v4.19.13 snapshot.
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
new file mode 100644
index 0000000..de15bf5
--- /dev/null
+++ b/drivers/extcon/Kconfig
@@ -0,0 +1,161 @@
+menuconfig EXTCON
+ tristate "External Connector Class (extcon) support"
+ help
+ Say Y here to enable external connector class (extcon) support.
+ This allows monitoring external connectors by userspace
+ via sysfs and uevent and supports external connectors with
+ multiple states; i.e., an extcon that may have multiple
+ cables attached. For example, an external connector of a device
+ may be used to connect an HDMI cable and a AC adaptor, and to
+ host USB ports. Many of 30-pin connectors including PDMI are
+ also good examples.
+
+if EXTCON
+
+comment "Extcon Device Drivers"
+
+config EXTCON_ADC_JACK
+ tristate "ADC Jack extcon support"
+ depends on IIO
+ help
+ Say Y here to enable extcon device driver based on ADC values.
+
+config EXTCON_ARIZONA
+ tristate "Wolfson Arizona EXTCON support"
+ depends on MFD_ARIZONA && INPUT && SND_SOC
+ help
+ Say Y here to enable support for external accessory detection
+ with Wolfson Arizona devices. These are audio CODECs with
+ advanced audio accessory detection support.
+
+config EXTCON_AXP288
+ tristate "X-Power AXP288 EXTCON support"
+ depends on MFD_AXP20X && USB_SUPPORT && X86
+ select USB_ROLE_SWITCH
+ help
+ Say Y here to enable support for USB peripheral detection
+ and USB MUX switching by X-Power AXP288 PMIC.
+
+config EXTCON_GPIO
+ tristate "GPIO extcon support"
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ Say Y here to enable GPIO based extcon support. Note that GPIO
+ extcon supports single state per extcon instance.
+
+config EXTCON_INTEL_INT3496
+ tristate "Intel INT3496 ACPI device extcon driver"
+ depends on GPIOLIB && ACPI && (X86 || COMPILE_TEST)
+ help
+ Say Y here to enable extcon support for USB OTG ports controlled by
+ an Intel INT3496 ACPI device.
+
+ This ACPI device is typically found on Intel Baytrail or Cherrytrail
+ based tablets, or other Baytrail / Cherrytrail devices.
+
+config EXTCON_INTEL_CHT_WC
+ tristate "Intel Cherrytrail Whiskey Cove PMIC extcon driver"
+ depends on INTEL_SOC_PMIC_CHTWC
+ help
+ Say Y here to enable extcon support for charger detection / control
+ on the Intel Cherrytrail Whiskey Cove PMIC.
+
+config EXTCON_MAX14577
+ tristate "Maxim MAX14577/77836 EXTCON Support"
+ depends on MFD_MAX14577
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX14577/77836. The MAX14577/77836 MUIC is a USB port accessory
+ detector and switch.
+
+config EXTCON_MAX3355
+ tristate "Maxim MAX3355 USB OTG EXTCON Support"
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ If you say yes here you get support for the USB OTG role detection by
+ MAX3355. The MAX3355 chip integrates a charge pump and comparators to
+ enable a system with an integrated USB OTG dual-role transceiver to
+ function as an USB OTG dual-role device.
+
+config EXTCON_MAX77693
+ tristate "Maxim MAX77693 EXTCON Support"
+ depends on MFD_MAX77693 && INPUT
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX77693 PMIC. The MAX77693 MUIC is a USB port accessory
+ detector and switch.
+
+config EXTCON_MAX77843
+ tristate "Maxim MAX77843 EXTCON Support"
+ depends on MFD_MAX77843
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX77843. The MAX77843 MUIC is a USB port accessory
+ detector add switch.
+
+config EXTCON_MAX8997
+ tristate "Maxim MAX8997 EXTCON Support"
+ depends on MFD_MAX8997 && IRQ_DOMAIN
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory
+ detector and switch.
+
+config EXTCON_PALMAS
+ tristate "Palmas USB EXTCON support"
+ depends on MFD_PALMAS
+ help
+ Say Y here to enable support for USB peripheral and USB host
+ detection by palmas usb.
+
+config EXTCON_QCOM_SPMI_MISC
+ tristate "Qualcomm USB extcon support"
+ depends on ARCH_QCOM || COMPILE_TEST
+ help
+ Say Y here to enable SPMI PMIC based USB cable detection
+ support on Qualcomm PMICs such as PM8941.
+
+config EXTCON_RT8973A
+ tristate "Richtek RT8973A EXTCON support"
+ depends on I2C
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ help
+ If you say yes here you get support for the MUIC device of
+ Richtek RT8973A. The RT8973A is a USB port accessory detector
+ and switch that is optimized to protect low voltage system
+ from abnormal high input voltage (up to 28V).
+
+config EXTCON_SM5502
+ tristate "Silicon Mitus SM5502 EXTCON support"
+ depends on I2C
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ help
+ If you say yes here you get support for the MUIC device of
+ Silicon Mitus SM5502. The SM5502 is a USB port accessory
+ detector and switch.
+
+config EXTCON_USB_GPIO
+ tristate "USB GPIO extcon support"
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ Say Y here to enable GPIO based USB cable detection extcon support.
+ Used typically if GPIO is used for USB ID pin detection.
+
+config EXTCON_USBC_CROS_EC
+ tristate "ChromeOS Embedded Controller EXTCON support"
+ depends on MFD_CROS_EC
+ help
+ Say Y here to enable USB Type C cable detection extcon support when
+ using Chrome OS EC based USB Type-C ports.
+
+endif
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
new file mode 100644
index 0000000..0888fde
--- /dev/null
+++ b/drivers/extcon/Makefile
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Makefile for external connector class (extcon) devices
+#
+
+obj-$(CONFIG_EXTCON) += extcon-core.o
+extcon-core-objs += extcon.o devres.o
+obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o
+obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
+obj-$(CONFIG_EXTCON_AXP288) += extcon-axp288.o
+obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
+obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o
+obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o
+obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
+obj-$(CONFIG_EXTCON_MAX3355) += extcon-max3355.o
+obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
+obj-$(CONFIG_EXTCON_MAX77843) += extcon-max77843.o
+obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
+obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o
+obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) += extcon-qcom-spmi-misc.o
+obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
+obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
+obj-$(CONFIG_EXTCON_USB_GPIO) += extcon-usb-gpio.o
+obj-$(CONFIG_EXTCON_USBC_CROS_EC) += extcon-usbc-cros-ec.o
diff --git a/drivers/extcon/devres.c b/drivers/extcon/devres.c
new file mode 100644
index 0000000..f599aed
--- /dev/null
+++ b/drivers/extcon/devres.c
@@ -0,0 +1,275 @@
+/*
+ * drivers/extcon/devres.c - EXTCON device's resource management
+ *
+ * Copyright (C) 2016 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "extcon.h"
+
+static int devm_extcon_dev_match(struct device *dev, void *res, void *data)
+{
+ struct extcon_dev **r = res;
+
+ if (WARN_ON(!r || !*r))
+ return 0;
+
+ return *r == data;
+}
+
+static void devm_extcon_dev_release(struct device *dev, void *res)
+{
+ extcon_dev_free(*(struct extcon_dev **)res);
+}
+
+
+static void devm_extcon_dev_unreg(struct device *dev, void *res)
+{
+ extcon_dev_unregister(*(struct extcon_dev **)res);
+}
+
+struct extcon_dev_notifier_devres {
+ struct extcon_dev *edev;
+ unsigned int id;
+ struct notifier_block *nb;
+};
+
+static void devm_extcon_dev_notifier_unreg(struct device *dev, void *res)
+{
+ struct extcon_dev_notifier_devres *this = res;
+
+ extcon_unregister_notifier(this->edev, this->id, this->nb);
+}
+
+static void devm_extcon_dev_notifier_all_unreg(struct device *dev, void *res)
+{
+ struct extcon_dev_notifier_devres *this = res;
+
+ extcon_unregister_notifier_all(this->edev, this->nb);
+}
+
+/**
+ * devm_extcon_dev_allocate - Allocate managed extcon device
+ * @dev: the device owning the extcon device being created
+ * @supported_cable: the array of the supported external connectors
+ * ending with EXTCON_NONE.
+ *
+ * This function manages automatically the memory of extcon device using device
+ * resource management and simplify the control of freeing the memory of extcon
+ * device.
+ *
+ * Returns the pointer memory of allocated extcon_dev if success
+ * or ERR_PTR(err) if fail
+ */
+struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
+ const unsigned int *supported_cable)
+{
+ struct extcon_dev **ptr, *edev;
+
+ ptr = devres_alloc(devm_extcon_dev_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ edev = extcon_dev_allocate(supported_cable);
+ if (IS_ERR(edev)) {
+ devres_free(ptr);
+ return edev;
+ }
+
+ edev->dev.parent = dev;
+
+ *ptr = edev;
+ devres_add(dev, ptr);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devm_extcon_dev_allocate);
+
+/**
+ * devm_extcon_dev_free() - Resource-managed extcon_dev_unregister()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device to be freed
+ *
+ * Free the memory that is allocated with devm_extcon_dev_allocate()
+ * function.
+ */
+void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev)
+{
+ WARN_ON(devres_release(dev, devm_extcon_dev_release,
+ devm_extcon_dev_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_extcon_dev_free);
+
+/**
+ * devm_extcon_dev_register() - Resource-managed extcon_dev_register()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device to be registered
+ *
+ * this function, that extcon device is automatically unregistered on driver
+ * detach. Internally this function calls extcon_dev_register() function.
+ * To get more information, refer that function.
+ *
+ * If extcon device is registered with this function and the device needs to be
+ * unregistered separately, devm_extcon_dev_unregister() should be used.
+ *
+ * Returns 0 if success or negaive error number if failure.
+ */
+int devm_extcon_dev_register(struct device *dev, struct extcon_dev *edev)
+{
+ struct extcon_dev **ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_extcon_dev_unreg, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = extcon_dev_register(edev);
+ if (ret) {
+ devres_free(ptr);
+ return ret;
+ }
+
+ *ptr = edev;
+ devres_add(dev, ptr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_extcon_dev_register);
+
+/**
+ * devm_extcon_dev_unregister() - Resource-managed extcon_dev_unregister()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device to unregistered
+ *
+ * Unregister extcon device that is registered with devm_extcon_dev_register()
+ * function.
+ */
+void devm_extcon_dev_unregister(struct device *dev, struct extcon_dev *edev)
+{
+ WARN_ON(devres_release(dev, devm_extcon_dev_unreg,
+ devm_extcon_dev_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_extcon_dev_unregister);
+
+/**
+ * devm_extcon_register_notifier() - Resource-managed extcon_register_notifier()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device
+ * @id: the unique id among the extcon enumeration
+ * @nb: a notifier block to be registered
+ *
+ * This function manages automatically the notifier of extcon device using
+ * device resource management and simplify the control of unregistering
+ * the notifier of extcon device.
+ *
+ * Note that the second parameter given to the callback of nb (val) is
+ * "old_state", not the current state. The current state can be retrieved
+ * by looking at the third pameter (edev pointer)'s state value.
+ *
+ * Returns 0 if success or negaive error number if failure.
+ */
+int devm_extcon_register_notifier(struct device *dev, struct extcon_dev *edev,
+ unsigned int id, struct notifier_block *nb)
+{
+ struct extcon_dev_notifier_devres *ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_extcon_dev_notifier_unreg, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = extcon_register_notifier(edev, id, nb);
+ if (ret) {
+ devres_free(ptr);
+ return ret;
+ }
+
+ ptr->edev = edev;
+ ptr->id = id;
+ ptr->nb = nb;
+ devres_add(dev, ptr);
+
+ return 0;
+}
+EXPORT_SYMBOL(devm_extcon_register_notifier);
+
+/**
+ * devm_extcon_unregister_notifier()
+ - Resource-managed extcon_unregister_notifier()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device
+ * @id: the unique id among the extcon enumeration
+ * @nb: a notifier block to be registered
+ */
+void devm_extcon_unregister_notifier(struct device *dev,
+ struct extcon_dev *edev, unsigned int id,
+ struct notifier_block *nb)
+{
+ WARN_ON(devres_release(dev, devm_extcon_dev_notifier_unreg,
+ devm_extcon_dev_match, edev));
+}
+EXPORT_SYMBOL(devm_extcon_unregister_notifier);
+
+/**
+ * devm_extcon_register_notifier_all()
+ * - Resource-managed extcon_register_notifier_all()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device
+ * @nb: a notifier block to be registered
+ *
+ * This function manages automatically the notifier of extcon device using
+ * device resource management and simplify the control of unregistering
+ * the notifier of extcon device. To get more information, refer that function.
+ *
+ * Returns 0 if success or negaive error number if failure.
+ */
+int devm_extcon_register_notifier_all(struct device *dev, struct extcon_dev *edev,
+ struct notifier_block *nb)
+{
+ struct extcon_dev_notifier_devres *ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_extcon_dev_notifier_all_unreg, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = extcon_register_notifier_all(edev, nb);
+ if (ret) {
+ devres_free(ptr);
+ return ret;
+ }
+
+ ptr->edev = edev;
+ ptr->nb = nb;
+ devres_add(dev, ptr);
+
+ return 0;
+}
+EXPORT_SYMBOL(devm_extcon_register_notifier_all);
+
+/**
+ * devm_extcon_unregister_notifier_all()
+ * - Resource-managed extcon_unregister_notifier_all()
+ * @dev: the device owning the extcon device being created
+ * @edev: the extcon device
+ * @nb: a notifier block to be registered
+ */
+void devm_extcon_unregister_notifier_all(struct device *dev,
+ struct extcon_dev *edev,
+ struct notifier_block *nb)
+{
+ WARN_ON(devres_release(dev, devm_extcon_dev_notifier_all_unreg,
+ devm_extcon_dev_match, edev));
+}
+EXPORT_SYMBOL(devm_extcon_unregister_notifier_all);
diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c
new file mode 100644
index 0000000..1802635
--- /dev/null
+++ b/drivers/extcon/extcon-adc-jack.c
@@ -0,0 +1,217 @@
+/*
+ * drivers/extcon/extcon-adc-jack.c
+ *
+ * Analog Jack extcon driver with ADC-based detection capability.
+ *
+ * Copyright (C) 2016 Samsung Electronics
+ * Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * Modified for calling to IIO to get adc by <anish.singh@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/iio/consumer.h>
+#include <linux/extcon/extcon-adc-jack.h>
+#include <linux/extcon-provider.h>
+
+/**
+ * struct adc_jack_data - internal data for adc_jack device driver
+ * @edev: extcon device.
+ * @cable_names: list of supported cables.
+ * @adc_conditions: list of adc value conditions.
+ * @num_conditions: size of adc_conditions.
+ * @irq: irq number of attach/detach event (0 if not exist).
+ * @handling_delay: interrupt handler will schedule extcon event
+ * handling at handling_delay jiffies.
+ * @handler: extcon event handler called by interrupt handler.
+ * @chan: iio channel being queried.
+ */
+struct adc_jack_data {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ const unsigned int **cable_names;
+ struct adc_jack_cond *adc_conditions;
+ int num_conditions;
+
+ int irq;
+ unsigned long handling_delay; /* in jiffies */
+ struct delayed_work handler;
+
+ struct iio_channel *chan;
+ bool wakeup_source;
+};
+
+static void adc_jack_handler(struct work_struct *work)
+{
+ struct adc_jack_data *data = container_of(to_delayed_work(work),
+ struct adc_jack_data,
+ handler);
+ struct adc_jack_cond *def;
+ int ret, adc_val;
+ int i;
+
+ ret = iio_read_channel_raw(data->chan, &adc_val);
+ if (ret < 0) {
+ dev_err(data->dev, "read channel() error: %d\n", ret);
+ return;
+ }
+
+ /* Get state from adc value with adc_conditions */
+ for (i = 0; i < data->num_conditions; i++) {
+ def = &data->adc_conditions[i];
+ if (def->min_adc <= adc_val && def->max_adc >= adc_val) {
+ extcon_set_state_sync(data->edev, def->id, true);
+ return;
+ }
+ }
+
+ /* Set the detached state if adc value is not included in the range */
+ for (i = 0; i < data->num_conditions; i++) {
+ def = &data->adc_conditions[i];
+ extcon_set_state_sync(data->edev, def->id, false);
+ }
+}
+
+static irqreturn_t adc_jack_irq_thread(int irq, void *_data)
+{
+ struct adc_jack_data *data = _data;
+
+ queue_delayed_work(system_power_efficient_wq,
+ &data->handler, data->handling_delay);
+ return IRQ_HANDLED;
+}
+
+static int adc_jack_probe(struct platform_device *pdev)
+{
+ struct adc_jack_data *data;
+ struct adc_jack_pdata *pdata = dev_get_platdata(&pdev->dev);
+ int i, err = 0;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ if (!pdata->cable_names) {
+ dev_err(&pdev->dev, "error: cable_names not defined.\n");
+ return -EINVAL;
+ }
+
+ data->dev = &pdev->dev;
+ data->edev = devm_extcon_dev_allocate(&pdev->dev, pdata->cable_names);
+ if (IS_ERR(data->edev)) {
+ dev_err(&pdev->dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ if (!pdata->adc_conditions) {
+ dev_err(&pdev->dev, "error: adc_conditions not defined.\n");
+ return -EINVAL;
+ }
+ data->adc_conditions = pdata->adc_conditions;
+
+ /* Check the length of array and set num_conditions */
+ for (i = 0; data->adc_conditions[i].id != EXTCON_NONE; i++);
+ data->num_conditions = i;
+
+ data->chan = iio_channel_get(&pdev->dev, pdata->consumer_channel);
+ if (IS_ERR(data->chan))
+ return PTR_ERR(data->chan);
+
+ data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms);
+ data->wakeup_source = pdata->wakeup_source;
+
+ INIT_DEFERRABLE_WORK(&data->handler, adc_jack_handler);
+
+ platform_set_drvdata(pdev, data);
+
+ err = devm_extcon_dev_register(&pdev->dev, data->edev);
+ if (err)
+ return err;
+
+ data->irq = platform_get_irq(pdev, 0);
+ if (data->irq < 0) {
+ dev_err(&pdev->dev, "platform_get_irq failed\n");
+ return -ENODEV;
+ }
+
+ err = request_any_context_irq(data->irq, adc_jack_irq_thread,
+ pdata->irq_flags, pdata->name, data);
+
+ if (err < 0) {
+ dev_err(&pdev->dev, "error: irq %d\n", data->irq);
+ return err;
+ }
+
+ if (data->wakeup_source)
+ device_init_wakeup(&pdev->dev, 1);
+
+ adc_jack_handler(&data->handler.work);
+ return 0;
+}
+
+static int adc_jack_remove(struct platform_device *pdev)
+{
+ struct adc_jack_data *data = platform_get_drvdata(pdev);
+
+ free_irq(data->irq, data);
+ cancel_work_sync(&data->handler.work);
+ iio_channel_release(data->chan);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int adc_jack_suspend(struct device *dev)
+{
+ struct adc_jack_data *data = dev_get_drvdata(dev);
+
+ cancel_delayed_work_sync(&data->handler);
+ if (device_may_wakeup(data->dev))
+ enable_irq_wake(data->irq);
+
+ return 0;
+}
+
+static int adc_jack_resume(struct device *dev)
+{
+ struct adc_jack_data *data = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(data->dev))
+ disable_irq_wake(data->irq);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(adc_jack_pm_ops,
+ adc_jack_suspend, adc_jack_resume);
+
+static struct platform_driver adc_jack_driver = {
+ .probe = adc_jack_probe,
+ .remove = adc_jack_remove,
+ .driver = {
+ .name = "adc-jack",
+ .pm = &adc_jack_pm_ops,
+ },
+};
+
+module_platform_driver(adc_jack_driver);
+
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_DESCRIPTION("ADC Jack extcon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
new file mode 100644
index 0000000..da0e9bc
--- /dev/null
+++ b/drivers/extcon/extcon-arizona.c
@@ -0,0 +1,1773 @@
+/*
+ * extcon-arizona.c - Extcon driver Wolfson Arizona devices
+ *
+ * Copyright (C) 2012-2014 Wolfson Microelectronics plc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/extcon-provider.h>
+
+#include <sound/soc.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+#include <dt-bindings/mfd/arizona.h>
+
+#define ARIZONA_MAX_MICD_RANGE 8
+
+#define ARIZONA_MICD_CLAMP_MODE_JDL 0x4
+#define ARIZONA_MICD_CLAMP_MODE_JDH 0x5
+#define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9
+#define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb
+
+#define ARIZONA_TST_CAP_DEFAULT 0x3
+#define ARIZONA_TST_CAP_CLAMP 0x1
+
+#define ARIZONA_HPDET_MAX 10000
+
+#define HPDET_DEBOUNCE 500
+#define DEFAULT_MICD_TIMEOUT 2000
+
+#define ARIZONA_HPDET_WAIT_COUNT 15
+#define ARIZONA_HPDET_WAIT_DELAY_MS 20
+
+#define QUICK_HEADPHONE_MAX_OHM 3
+#define MICROPHONE_MIN_OHM 1257
+#define MICROPHONE_MAX_OHM 30000
+
+#define MICD_DBTIME_TWO_READINGS 2
+#define MICD_DBTIME_FOUR_READINGS 4
+
+#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
+ ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
+ ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
+ ARIZONA_MICD_LVL_7)
+
+#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7)
+
+#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8)
+
+struct arizona_extcon_info {
+ struct device *dev;
+ struct arizona *arizona;
+ struct mutex lock;
+ struct regulator *micvdd;
+ struct input_dev *input;
+
+ u16 last_jackdet;
+
+ int micd_mode;
+ const struct arizona_micd_config *micd_modes;
+ int micd_num_modes;
+
+ const struct arizona_micd_range *micd_ranges;
+ int num_micd_ranges;
+
+ int micd_timeout;
+
+ bool micd_reva;
+ bool micd_clamp;
+
+ struct delayed_work hpdet_work;
+ struct delayed_work micd_detect_work;
+ struct delayed_work micd_timeout_work;
+
+ bool hpdet_active;
+ bool hpdet_done;
+ bool hpdet_retried;
+
+ int num_hpdet_res;
+ unsigned int hpdet_res[3];
+
+ bool mic;
+ bool detecting;
+ int jack_flips;
+
+ int hpdet_ip_version;
+
+ struct extcon_dev *edev;
+
+ struct gpio_desc *micd_pol_gpio;
+};
+
+static const struct arizona_micd_config micd_default_modes[] = {
+ { ARIZONA_ACCDET_SRC, 1, 0 },
+ { 0, 2, 1 },
+};
+
+static const struct arizona_micd_range micd_default_ranges[] = {
+ { .max = 11, .key = BTN_0 },
+ { .max = 28, .key = BTN_1 },
+ { .max = 54, .key = BTN_2 },
+ { .max = 100, .key = BTN_3 },
+ { .max = 186, .key = BTN_4 },
+ { .max = 430, .key = BTN_5 },
+};
+
+/* The number of levels in arizona_micd_levels valid for button thresholds */
+#define ARIZONA_NUM_MICD_BUTTON_LEVELS 64
+
+static const int arizona_micd_levels[] = {
+ 3, 6, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 34, 36, 39, 41, 44, 46,
+ 49, 52, 54, 57, 60, 62, 65, 67, 70, 73, 75, 78, 81, 83, 89, 94, 100,
+ 105, 111, 116, 122, 127, 139, 150, 161, 173, 186, 196, 209, 220, 245,
+ 270, 295, 321, 348, 375, 402, 430, 489, 550, 614, 681, 752, 903, 1071,
+ 1257, 30000,
+};
+
+static const unsigned int arizona_cable[] = {
+ EXTCON_MECHANICAL,
+ EXTCON_JACK_MICROPHONE,
+ EXTCON_JACK_HEADPHONE,
+ EXTCON_JACK_LINE_OUT,
+ EXTCON_NONE,
+};
+
+static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info);
+
+static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
+ bool clamp)
+{
+ struct arizona *arizona = info->arizona;
+ unsigned int mask = 0, val = 0;
+ unsigned int cap_sel = 0;
+ int ret;
+
+ switch (arizona->type) {
+ case WM8998:
+ case WM1814:
+ mask = 0;
+ break;
+ case WM5110:
+ case WM8280:
+ mask = ARIZONA_HP1L_SHRTO | ARIZONA_HP1L_FLWR |
+ ARIZONA_HP1L_SHRTI;
+ if (clamp) {
+ val = ARIZONA_HP1L_SHRTO;
+ cap_sel = ARIZONA_TST_CAP_CLAMP;
+ } else {
+ val = ARIZONA_HP1L_FLWR | ARIZONA_HP1L_SHRTI;
+ cap_sel = ARIZONA_TST_CAP_DEFAULT;
+ }
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_HP_TEST_CTRL_1,
+ ARIZONA_HP1_TST_CAP_SEL_MASK,
+ cap_sel);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to set TST_CAP_SEL: %d\n", ret);
+ break;
+ default:
+ mask = ARIZONA_RMV_SHRT_HP1L;
+ if (clamp)
+ val = ARIZONA_RMV_SHRT_HP1L;
+ break;
+ }
+
+ snd_soc_dapm_mutex_lock(arizona->dapm);
+
+ arizona->hpdet_clamp = clamp;
+
+ /* Keep the HP output stages disabled while doing the clamp */
+ if (clamp) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_OUTPUT_ENABLES_1,
+ ARIZONA_OUT1L_ENA |
+ ARIZONA_OUT1R_ENA, 0);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to disable headphone outputs: %d\n",
+ ret);
+ }
+
+ if (mask) {
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1L,
+ mask, val);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do clamp: %d\n",
+ ret);
+
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1R,
+ mask, val);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do clamp: %d\n",
+ ret);
+ }
+
+ /* Restore the desired state while not doing the clamp */
+ if (!clamp) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_OUTPUT_ENABLES_1,
+ ARIZONA_OUT1L_ENA |
+ ARIZONA_OUT1R_ENA, arizona->hp_ena);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to restore headphone outputs: %d\n",
+ ret);
+ }
+
+ snd_soc_dapm_mutex_unlock(arizona->dapm);
+}
+
+static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
+{
+ struct arizona *arizona = info->arizona;
+
+ mode %= info->micd_num_modes;
+
+ gpiod_set_value_cansleep(info->micd_pol_gpio,
+ info->micd_modes[mode].gpio);
+
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_SRC_MASK,
+ info->micd_modes[mode].bias <<
+ ARIZONA_MICD_BIAS_SRC_SHIFT);
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
+
+ info->micd_mode = mode;
+
+ dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
+}
+
+static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info)
+{
+ switch (info->micd_modes[0].bias) {
+ case 1:
+ return "MICBIAS1";
+ case 2:
+ return "MICBIAS2";
+ case 3:
+ return "MICBIAS3";
+ default:
+ return "MICVDD";
+ }
+}
+
+static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
+ struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
+ int ret;
+
+ ret = snd_soc_component_force_enable_pin(component, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to enable %s: %d\n",
+ widget, ret);
+
+ snd_soc_dapm_sync(dapm);
+
+ if (!arizona->pdata.micd_force_micbias) {
+ ret = snd_soc_component_disable_pin(component, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to disable %s: %d\n",
+ widget, ret);
+
+ snd_soc_dapm_sync(dapm);
+ }
+}
+
+static void arizona_start_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ bool change;
+ int ret;
+ unsigned int mode;
+
+ /* Microphone detection can't use idle mode */
+ pm_runtime_get(info->dev);
+
+ if (info->detecting) {
+ ret = regulator_allow_bypass(info->micvdd, false);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to regulate MICVDD: %d\n",
+ ret);
+ }
+ }
+
+ ret = regulator_enable(info->micvdd);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
+ ret);
+ }
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 0);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ if (info->detecting && arizona->pdata.micd_software_compare)
+ mode = ARIZONA_ACCDET_MODE_ADC;
+ else
+ mode = ARIZONA_ACCDET_MODE_MIC;
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, mode);
+
+ arizona_extcon_pulse_micbias(info);
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
+ &change);
+ if (!change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static void arizona_stop_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
+ struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
+ bool change;
+ int ret;
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0,
+ &change);
+
+ ret = snd_soc_component_disable_pin(component, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to disable %s: %d\n",
+ widget, ret);
+
+ snd_soc_dapm_sync(dapm);
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 2);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ ret = regulator_allow_bypass(info->micvdd, true);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
+ if (change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_mark_last_busy(info->dev);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static struct {
+ unsigned int threshold;
+ unsigned int factor_a;
+ unsigned int factor_b;
+} arizona_hpdet_b_ranges[] = {
+ { 100, 5528, 362464 },
+ { 169, 11084, 6186851 },
+ { 169, 11065, 65460395 },
+};
+
+#define ARIZONA_HPDET_B_RANGE_MAX 0x3fb
+
+static struct {
+ int min;
+ int max;
+} arizona_hpdet_c_ranges[] = {
+ { 0, 30 },
+ { 8, 100 },
+ { 100, 1000 },
+ { 1000, 10000 },
+};
+
+static int arizona_hpdet_read(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ unsigned int val, range;
+ int ret;
+
+ ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read HPDET status: %d\n",
+ ret);
+ return ret;
+ }
+
+ switch (info->hpdet_ip_version) {
+ case 0:
+ if (!(val & ARIZONA_HP_DONE)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ val &= ARIZONA_HP_LVL_MASK;
+ break;
+
+ case 1:
+ if (!(val & ARIZONA_HP_DONE_B)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ ret = regmap_read(arizona->regmap, ARIZONA_HP_DACVAL, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read HP value: %d\n",
+ ret);
+ return -EAGAIN;
+ }
+
+ regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ &range);
+ range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
+ >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
+
+ if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 &&
+ (val < arizona_hpdet_b_ranges[range].threshold ||
+ val >= ARIZONA_HPDET_B_RANGE_MAX)) {
+ range++;
+ dev_dbg(arizona->dev, "Moving to HPDET range %d\n",
+ range);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK,
+ range <<
+ ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
+ return -EAGAIN;
+ }
+
+ /* If we go out of range report top of range */
+ if (val < arizona_hpdet_b_ranges[range].threshold ||
+ val >= ARIZONA_HPDET_B_RANGE_MAX) {
+ dev_dbg(arizona->dev, "Measurement out of range\n");
+ return ARIZONA_HPDET_MAX;
+ }
+
+ dev_dbg(arizona->dev, "HPDET read %d in range %d\n",
+ val, range);
+
+ val = arizona_hpdet_b_ranges[range].factor_b
+ / ((val * 100) -
+ arizona_hpdet_b_ranges[range].factor_a);
+ break;
+
+ case 2:
+ if (!(val & ARIZONA_HP_DONE_B)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ val &= ARIZONA_HP_LVL_B_MASK;
+ /* Convert to ohms, the value is in 0.5 ohm increments */
+ val /= 2;
+
+ regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ &range);
+ range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
+ >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
+
+ /* Skip up a range, or report? */
+ if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
+ (val >= arizona_hpdet_c_ranges[range].max)) {
+ range++;
+ dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
+ arizona_hpdet_c_ranges[range].min,
+ arizona_hpdet_c_ranges[range].max);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK,
+ range <<
+ ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
+ return -EAGAIN;
+ }
+
+ if (range && (val < arizona_hpdet_c_ranges[range].min)) {
+ dev_dbg(arizona->dev, "Reporting range boundary %d\n",
+ arizona_hpdet_c_ranges[range].min);
+ val = arizona_hpdet_c_ranges[range].min;
+ }
+ break;
+
+ default:
+ dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n",
+ info->hpdet_ip_version);
+ return -EINVAL;
+ }
+
+ dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);
+ return val;
+}
+
+static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading,
+ bool *mic)
+{
+ struct arizona *arizona = info->arizona;
+ int id_gpio = arizona->pdata.hpdet_id_gpio;
+
+ /*
+ * If we're using HPDET for accessory identification we need
+ * to take multiple measurements, step through them in sequence.
+ */
+ if (arizona->pdata.hpdet_acc_id) {
+ info->hpdet_res[info->num_hpdet_res++] = *reading;
+
+ /* Only check the mic directly if we didn't already ID it */
+ if (id_gpio && info->num_hpdet_res == 1) {
+ dev_dbg(arizona->dev, "Measuring mic\n");
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK |
+ ARIZONA_ACCDET_SRC,
+ ARIZONA_ACCDET_MODE_HPR |
+ info->micd_modes[0].src);
+
+ gpio_set_value_cansleep(id_gpio, 1);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ return -EAGAIN;
+ }
+
+ /* OK, got both. Now, compare... */
+ dev_dbg(arizona->dev, "HPDET measured %d %d\n",
+ info->hpdet_res[0], info->hpdet_res[1]);
+
+ /* Take the headphone impedance for the main report */
+ *reading = info->hpdet_res[0];
+
+ /* Sometimes we get false readings due to slow insert */
+ if (*reading >= ARIZONA_HPDET_MAX && !info->hpdet_retried) {
+ dev_dbg(arizona->dev, "Retrying high impedance\n");
+ info->num_hpdet_res = 0;
+ info->hpdet_retried = true;
+ arizona_start_hpdet_acc_id(info);
+ pm_runtime_put(info->dev);
+ return -EAGAIN;
+ }
+
+ /*
+ * If we measure the mic as high impedance
+ */
+ if (!id_gpio || info->hpdet_res[1] > 50) {
+ dev_dbg(arizona->dev, "Detected mic\n");
+ *mic = true;
+ info->detecting = true;
+ } else {
+ dev_dbg(arizona->dev, "Detected headphone\n");
+ }
+
+ /* Make sure everything is reset back to the real polarity */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC,
+ info->micd_modes[0].src);
+ }
+
+ return 0;
+}
+
+static irqreturn_t arizona_hpdet_irq(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ int id_gpio = arizona->pdata.hpdet_id_gpio;
+ unsigned int report = EXTCON_JACK_HEADPHONE;
+ int ret, reading;
+ bool mic = false;
+
+ mutex_lock(&info->lock);
+
+ /* If we got a spurious IRQ for some reason then ignore it */
+ if (!info->hpdet_active) {
+ dev_warn(arizona->dev, "Spurious HPDET IRQ\n");
+ mutex_unlock(&info->lock);
+ return IRQ_NONE;
+ }
+
+ /* If the cable was removed while measuring ignore the result */
+ ret = extcon_get_state(info->edev, EXTCON_MECHANICAL);
+ if (ret < 0) {
+ dev_err(arizona->dev, "Failed to check cable state: %d\n",
+ ret);
+ goto out;
+ } else if (!ret) {
+ dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n");
+ goto done;
+ }
+
+ ret = arizona_hpdet_read(info);
+ if (ret == -EAGAIN)
+ goto out;
+ else if (ret < 0)
+ goto done;
+ reading = ret;
+
+ /* Reset back to starting range */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
+ 0);
+
+ ret = arizona_hpdet_do_id(info, &reading, &mic);
+ if (ret == -EAGAIN)
+ goto out;
+ else if (ret < 0)
+ goto done;
+
+ /* Report high impedence cables as line outputs */
+ if (reading >= 5000)
+ report = EXTCON_JACK_LINE_OUT;
+ else
+ report = EXTCON_JACK_HEADPHONE;
+
+ ret = extcon_set_state_sync(info->edev, report, true);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report HP/line: %d\n",
+ ret);
+
+done:
+ /* Reset back to starting range */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
+ 0);
+
+ arizona_extcon_hp_clamp(info, false);
+
+ if (id_gpio)
+ gpio_set_value_cansleep(id_gpio, 0);
+
+ /* Revert back to MICDET mode */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* If we have a mic then reenable MICDET */
+ if (mic || info->mic)
+ arizona_start_mic(info);
+
+ if (info->hpdet_active) {
+ pm_runtime_put_autosuspend(info->dev);
+ info->hpdet_active = false;
+ }
+
+ info->hpdet_done = true;
+
+out:
+ mutex_unlock(&info->lock);
+
+ return IRQ_HANDLED;
+}
+
+static void arizona_identify_headphone(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ int ret;
+
+ if (info->hpdet_done)
+ return;
+
+ dev_dbg(arizona->dev, "Starting HPDET\n");
+
+ /* Make sure we keep the device enabled during the measurement */
+ pm_runtime_get(info->dev);
+
+ info->hpdet_active = true;
+
+ if (info->mic)
+ arizona_stop_mic(info);
+
+ arizona_extcon_hp_clamp(info, true);
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK,
+ arizona->pdata.hpdet_channel);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret);
+ goto err;
+ }
+
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
+ ret);
+ goto err;
+ }
+
+ return;
+
+err:
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* Just report headphone */
+ ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
+
+ if (info->mic)
+ arizona_start_mic(info);
+
+ info->hpdet_active = false;
+}
+
+static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ int hp_reading = 32;
+ bool mic;
+ int ret;
+
+ dev_dbg(arizona->dev, "Starting identification via HPDET\n");
+
+ /* Make sure we keep the device enabled during the measurement */
+ pm_runtime_get_sync(info->dev);
+
+ info->hpdet_active = true;
+
+ arizona_extcon_hp_clamp(info, true);
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK,
+ info->micd_modes[0].src |
+ arizona->pdata.hpdet_channel);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret);
+ goto err;
+ }
+
+ if (arizona->pdata.hpdet_acc_id_line) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Can't start HPDETL measurement: %d\n",
+ ret);
+ goto err;
+ }
+ } else {
+ arizona_hpdet_do_id(info, &hp_reading, &mic);
+ }
+
+ return;
+
+err:
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* Just report headphone */
+ ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
+
+ info->hpdet_active = false;
+}
+
+static void arizona_micd_timeout_work(struct work_struct *work)
+{
+ struct arizona_extcon_info *info = container_of(work,
+ struct arizona_extcon_info,
+ micd_timeout_work.work);
+
+ mutex_lock(&info->lock);
+
+ dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
+
+ info->detecting = false;
+
+ arizona_identify_headphone(info);
+
+ arizona_stop_mic(info);
+
+ mutex_unlock(&info->lock);
+}
+
+static void arizona_micd_detect(struct work_struct *work)
+{
+ struct arizona_extcon_info *info = container_of(work,
+ struct arizona_extcon_info,
+ micd_detect_work.work);
+ struct arizona *arizona = info->arizona;
+ unsigned int val = 0, lvl;
+ int ret, i, key;
+
+ cancel_delayed_work_sync(&info->micd_timeout_work);
+
+ mutex_lock(&info->lock);
+
+ /* If the cable was removed while measuring ignore the result */
+ ret = extcon_get_state(info->edev, EXTCON_MECHANICAL);
+ if (ret < 0) {
+ dev_err(arizona->dev, "Failed to check cable state: %d\n",
+ ret);
+ mutex_unlock(&info->lock);
+ return;
+ } else if (!ret) {
+ dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n");
+ mutex_unlock(&info->lock);
+ return;
+ }
+
+ if (info->detecting && arizona->pdata.micd_software_compare) {
+ /* Must disable MICD before we read the ADCVAL */
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0);
+ ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_4, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to read MICDET_ADCVAL: %d\n",
+ ret);
+ mutex_unlock(&info->lock);
+ return;
+ }
+
+ dev_dbg(arizona->dev, "MICDET_ADCVAL: %x\n", val);
+
+ val &= ARIZONA_MICDET_ADCVAL_MASK;
+ if (val < ARRAY_SIZE(arizona_micd_levels))
+ val = arizona_micd_levels[val];
+ else
+ val = INT_MAX;
+
+ if (val <= QUICK_HEADPHONE_MAX_OHM)
+ val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_0;
+ else if (val <= MICROPHONE_MIN_OHM)
+ val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_1;
+ else if (val <= MICROPHONE_MAX_OHM)
+ val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_8;
+ else
+ val = ARIZONA_MICD_LVL_8;
+ }
+
+ for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) {
+ ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to read MICDET: %d\n", ret);
+ mutex_unlock(&info->lock);
+ return;
+ }
+
+ dev_dbg(arizona->dev, "MICDET: %x\n", val);
+
+ if (!(val & ARIZONA_MICD_VALID)) {
+ dev_warn(arizona->dev,
+ "Microphone detection state invalid\n");
+ mutex_unlock(&info->lock);
+ return;
+ }
+ }
+
+ if (i == 10 && !(val & MICD_LVL_0_TO_8)) {
+ dev_err(arizona->dev, "Failed to get valid MICDET value\n");
+ mutex_unlock(&info->lock);
+ return;
+ }
+
+ /* Due to jack detect this should never happen */
+ if (!(val & ARIZONA_MICD_STS)) {
+ dev_warn(arizona->dev, "Detected open circuit\n");
+ info->mic = false;
+ arizona_stop_mic(info);
+ info->detecting = false;
+ arizona_identify_headphone(info);
+ goto handled;
+ }
+
+ /* If we got a high impedence we should have a headset, report it. */
+ if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
+ info->mic = true;
+ info->detecting = false;
+
+ arizona_identify_headphone(info);
+
+ ret = extcon_set_state_sync(info->edev,
+ EXTCON_JACK_MICROPHONE, true);
+ if (ret != 0)
+ dev_err(arizona->dev, "Headset report failed: %d\n",
+ ret);
+
+ /* Don't need to regulate for button detection */
+ ret = regulator_allow_bypass(info->micvdd, true);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
+ goto handled;
+ }
+
+ /* If we detected a lower impedence during initial startup
+ * then we probably have the wrong polarity, flip it. Don't
+ * do this for the lowest impedences to speed up detection of
+ * plain headphones. If both polarities report a low
+ * impedence then give up and report headphones.
+ */
+ if (info->detecting && (val & MICD_LVL_1_TO_7)) {
+ if (info->jack_flips >= info->micd_num_modes * 10) {
+ dev_dbg(arizona->dev, "Detected HP/line\n");
+
+ info->detecting = false;
+
+ arizona_identify_headphone(info);
+
+ arizona_stop_mic(info);
+ } else {
+ info->micd_mode++;
+ if (info->micd_mode == info->micd_num_modes)
+ info->micd_mode = 0;
+ arizona_extcon_set_mode(info, info->micd_mode);
+
+ info->jack_flips++;
+ }
+
+ goto handled;
+ }
+
+ /*
+ * If we're still detecting and we detect a short then we've
+ * got a headphone. Otherwise it's a button press.
+ */
+ if (val & MICD_LVL_0_TO_7) {
+ if (info->mic) {
+ dev_dbg(arizona->dev, "Mic button detected\n");
+
+ lvl = val & ARIZONA_MICD_LVL_MASK;
+ lvl >>= ARIZONA_MICD_LVL_SHIFT;
+
+ for (i = 0; i < info->num_micd_ranges; i++)
+ input_report_key(info->input,
+ info->micd_ranges[i].key, 0);
+
+ WARN_ON(!lvl);
+ WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges);
+ if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) {
+ key = info->micd_ranges[ffs(lvl) - 1].key;
+ input_report_key(info->input, key, 1);
+ input_sync(info->input);
+ }
+
+ } else if (info->detecting) {
+ dev_dbg(arizona->dev, "Headphone detected\n");
+ info->detecting = false;
+ arizona_stop_mic(info);
+
+ arizona_identify_headphone(info);
+ } else {
+ dev_warn(arizona->dev, "Button with no mic: %x\n",
+ val);
+ }
+ } else {
+ dev_dbg(arizona->dev, "Mic button released\n");
+ for (i = 0; i < info->num_micd_ranges; i++)
+ input_report_key(info->input,
+ info->micd_ranges[i].key, 0);
+ input_sync(info->input);
+ arizona_extcon_pulse_micbias(info);
+ }
+
+handled:
+ if (info->detecting) {
+ if (arizona->pdata.micd_software_compare)
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA,
+ ARIZONA_MICD_ENA);
+
+ queue_delayed_work(system_power_efficient_wq,
+ &info->micd_timeout_work,
+ msecs_to_jiffies(info->micd_timeout));
+ }
+
+ pm_runtime_mark_last_busy(info->dev);
+ mutex_unlock(&info->lock);
+}
+
+static irqreturn_t arizona_micdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ int debounce = arizona->pdata.micd_detect_debounce;
+
+ cancel_delayed_work_sync(&info->micd_detect_work);
+ cancel_delayed_work_sync(&info->micd_timeout_work);
+
+ mutex_lock(&info->lock);
+ if (!info->detecting)
+ debounce = 0;
+ mutex_unlock(&info->lock);
+
+ if (debounce)
+ queue_delayed_work(system_power_efficient_wq,
+ &info->micd_detect_work,
+ msecs_to_jiffies(debounce));
+ else
+ arizona_micd_detect(&info->micd_detect_work.work);
+
+ return IRQ_HANDLED;
+}
+
+static void arizona_hpdet_work(struct work_struct *work)
+{
+ struct arizona_extcon_info *info = container_of(work,
+ struct arizona_extcon_info,
+ hpdet_work.work);
+
+ mutex_lock(&info->lock);
+ arizona_start_hpdet_acc_id(info);
+ mutex_unlock(&info->lock);
+}
+
+static int arizona_hpdet_wait(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int i, ret;
+
+ for (i = 0; i < ARIZONA_HPDET_WAIT_COUNT; i++) {
+ ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2,
+ &val);
+ if (ret) {
+ dev_err(arizona->dev,
+ "Failed to read HPDET state: %d\n", ret);
+ return ret;
+ }
+
+ switch (info->hpdet_ip_version) {
+ case 0:
+ if (val & ARIZONA_HP_DONE)
+ return 0;
+ break;
+ default:
+ if (val & ARIZONA_HP_DONE_B)
+ return 0;
+ break;
+ }
+
+ msleep(ARIZONA_HPDET_WAIT_DELAY_MS);
+ }
+
+ dev_warn(arizona->dev, "HPDET did not appear to complete\n");
+
+ return -ETIMEDOUT;
+}
+
+static irqreturn_t arizona_jackdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ unsigned int val, present, mask;
+ bool cancelled_hp, cancelled_mic;
+ int ret, i;
+
+ cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work);
+ cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work);
+
+ pm_runtime_get_sync(info->dev);
+
+ mutex_lock(&info->lock);
+
+ if (info->micd_clamp) {
+ mask = ARIZONA_MICD_CLAMP_STS;
+ present = 0;
+ } else {
+ mask = ARIZONA_JD1_STS;
+ if (arizona->pdata.jd_invert)
+ present = 0;
+ else
+ present = ARIZONA_JD1_STS;
+ }
+
+ ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
+ ret);
+ mutex_unlock(&info->lock);
+ pm_runtime_put_autosuspend(info->dev);
+ return IRQ_NONE;
+ }
+
+ val &= mask;
+ if (val == info->last_jackdet) {
+ dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n");
+ if (cancelled_hp)
+ queue_delayed_work(system_power_efficient_wq,
+ &info->hpdet_work,
+ msecs_to_jiffies(HPDET_DEBOUNCE));
+
+ if (cancelled_mic) {
+ int micd_timeout = info->micd_timeout;
+
+ queue_delayed_work(system_power_efficient_wq,
+ &info->micd_timeout_work,
+ msecs_to_jiffies(micd_timeout));
+ }
+
+ goto out;
+ }
+ info->last_jackdet = val;
+
+ if (info->last_jackdet == present) {
+ dev_dbg(arizona->dev, "Detected jack\n");
+ ret = extcon_set_state_sync(info->edev,
+ EXTCON_MECHANICAL, true);
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Mechanical report failed: %d\n",
+ ret);
+
+ if (!arizona->pdata.hpdet_acc_id) {
+ info->detecting = true;
+ info->mic = false;
+ info->jack_flips = 0;
+
+ arizona_start_mic(info);
+ } else {
+ queue_delayed_work(system_power_efficient_wq,
+ &info->hpdet_work,
+ msecs_to_jiffies(HPDET_DEBOUNCE));
+ }
+
+ if (info->micd_clamp || !arizona->pdata.jd_invert)
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB |
+ ARIZONA_JD1_DB, 0);
+ } else {
+ dev_dbg(arizona->dev, "Detected jack removal\n");
+
+ arizona_stop_mic(info);
+
+ info->num_hpdet_res = 0;
+ for (i = 0; i < ARRAY_SIZE(info->hpdet_res); i++)
+ info->hpdet_res[i] = 0;
+ info->mic = false;
+ info->hpdet_done = false;
+ info->hpdet_retried = false;
+
+ for (i = 0; i < info->num_micd_ranges; i++)
+ input_report_key(info->input,
+ info->micd_ranges[i].key, 0);
+ input_sync(info->input);
+
+ for (i = 0; i < ARRAY_SIZE(arizona_cable) - 1; i++) {
+ ret = extcon_set_state_sync(info->edev,
+ arizona_cable[i], false);
+ if (ret != 0)
+ dev_err(arizona->dev,
+ "Removal report failed: %d\n", ret);
+ }
+
+ /*
+ * If the jack was removed during a headphone detection we
+ * need to wait for the headphone detection to finish, as
+ * it can not be aborted. We don't want to be able to start
+ * a new headphone detection from a fresh insert until this
+ * one is finished.
+ */
+ arizona_hpdet_wait(info);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB,
+ ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB);
+ }
+
+ if (arizona->pdata.micd_timeout)
+ info->micd_timeout = arizona->pdata.micd_timeout;
+ else
+ info->micd_timeout = DEFAULT_MICD_TIMEOUT;
+
+out:
+ /* Clear trig_sts to make sure DCVDD is not forced up */
+ regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG,
+ ARIZONA_MICD_CLAMP_FALL_TRIG_STS |
+ ARIZONA_MICD_CLAMP_RISE_TRIG_STS |
+ ARIZONA_JD1_FALL_TRIG_STS |
+ ARIZONA_JD1_RISE_TRIG_STS);
+
+ mutex_unlock(&info->lock);
+
+ pm_runtime_mark_last_busy(info->dev);
+ pm_runtime_put_autosuspend(info->dev);
+
+ return IRQ_HANDLED;
+}
+
+/* Map a level onto a slot in the register bank */
+static void arizona_micd_set_level(struct arizona *arizona, int index,
+ unsigned int level)
+{
+ int reg;
+ unsigned int mask;
+
+ reg = ARIZONA_MIC_DETECT_LEVEL_4 - (index / 2);
+
+ if (!(index % 2)) {
+ mask = 0x3f00;
+ level <<= 8;
+ } else {
+ mask = 0x3f;
+ }
+
+ /* Program the level itself */
+ regmap_update_bits(arizona->regmap, reg, mask, level);
+}
+
+static int arizona_extcon_get_micd_configs(struct device *dev,
+ struct arizona *arizona)
+{
+ const char * const prop = "wlf,micd-configs";
+ const int entries_per_config = 3;
+ struct arizona_micd_config *micd_configs;
+ int nconfs, ret;
+ int i, j;
+ u32 *vals;
+
+ nconfs = device_property_read_u32_array(arizona->dev, prop, NULL, 0);
+ if (nconfs <= 0)
+ return 0;
+
+ vals = kcalloc(nconfs, sizeof(u32), GFP_KERNEL);
+ if (!vals)
+ return -ENOMEM;
+
+ ret = device_property_read_u32_array(arizona->dev, prop, vals, nconfs);
+ if (ret < 0)
+ goto out;
+
+ nconfs /= entries_per_config;
+ micd_configs = devm_kcalloc(dev, nconfs, sizeof(*micd_configs),
+ GFP_KERNEL);
+ if (!micd_configs) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0, j = 0; i < nconfs; ++i) {
+ micd_configs[i].src = vals[j++] ? ARIZONA_ACCDET_SRC : 0;
+ micd_configs[i].bias = vals[j++];
+ micd_configs[i].gpio = vals[j++];
+ }
+
+ arizona->pdata.micd_configs = micd_configs;
+ arizona->pdata.num_micd_configs = nconfs;
+
+out:
+ kfree(vals);
+ return ret;
+}
+
+static int arizona_extcon_device_get_pdata(struct device *dev,
+ struct arizona *arizona)
+{
+ struct arizona_pdata *pdata = &arizona->pdata;
+ unsigned int val = ARIZONA_ACCDET_MODE_HPL;
+ int ret;
+
+ device_property_read_u32(arizona->dev, "wlf,hpdet-channel", &val);
+ switch (val) {
+ case ARIZONA_ACCDET_MODE_HPL:
+ case ARIZONA_ACCDET_MODE_HPR:
+ pdata->hpdet_channel = val;
+ break;
+ default:
+ dev_err(arizona->dev,
+ "Wrong wlf,hpdet-channel DT value %d\n", val);
+ pdata->hpdet_channel = ARIZONA_ACCDET_MODE_HPL;
+ }
+
+ device_property_read_u32(arizona->dev, "wlf,micd-detect-debounce",
+ &pdata->micd_detect_debounce);
+
+ device_property_read_u32(arizona->dev, "wlf,micd-bias-start-time",
+ &pdata->micd_bias_start_time);
+
+ device_property_read_u32(arizona->dev, "wlf,micd-rate",
+ &pdata->micd_rate);
+
+ device_property_read_u32(arizona->dev, "wlf,micd-dbtime",
+ &pdata->micd_dbtime);
+
+ device_property_read_u32(arizona->dev, "wlf,micd-timeout-ms",
+ &pdata->micd_timeout);
+
+ pdata->micd_force_micbias = device_property_read_bool(arizona->dev,
+ "wlf,micd-force-micbias");
+
+ pdata->micd_software_compare = device_property_read_bool(arizona->dev,
+ "wlf,micd-software-compare");
+
+ pdata->jd_invert = device_property_read_bool(arizona->dev,
+ "wlf,jd-invert");
+
+ device_property_read_u32(arizona->dev, "wlf,gpsw", &pdata->gpsw);
+
+ pdata->jd_gpio5 = device_property_read_bool(arizona->dev,
+ "wlf,use-jd2");
+ pdata->jd_gpio5_nopull = device_property_read_bool(arizona->dev,
+ "wlf,use-jd2-nopull");
+
+ ret = arizona_extcon_get_micd_configs(dev, arizona);
+ if (ret < 0)
+ dev_err(arizona->dev, "Failed to read micd configs: %d\n", ret);
+
+ return 0;
+}
+
+static int arizona_extcon_probe(struct platform_device *pdev)
+{
+ struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
+ struct arizona_pdata *pdata = &arizona->pdata;
+ struct arizona_extcon_info *info;
+ unsigned int val;
+ unsigned int clamp_mode;
+ int jack_irq_fall, jack_irq_rise;
+ int ret, mode, i, j;
+
+ if (!arizona->dapm || !arizona->dapm->card)
+ return -EPROBE_DEFER;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (!dev_get_platdata(arizona->dev))
+ arizona_extcon_device_get_pdata(&pdev->dev, arizona);
+
+ info->micvdd = devm_regulator_get(&pdev->dev, "MICVDD");
+ if (IS_ERR(info->micvdd)) {
+ ret = PTR_ERR(info->micvdd);
+ dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
+ return ret;
+ }
+
+ mutex_init(&info->lock);
+ info->arizona = arizona;
+ info->dev = &pdev->dev;
+ info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS);
+ INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
+ INIT_DELAYED_WORK(&info->micd_detect_work, arizona_micd_detect);
+ INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work);
+ platform_set_drvdata(pdev, info);
+
+ switch (arizona->type) {
+ case WM5102:
+ switch (arizona->rev) {
+ case 0:
+ info->micd_reva = true;
+ break;
+ default:
+ info->micd_clamp = true;
+ info->hpdet_ip_version = 1;
+ break;
+ }
+ break;
+ case WM5110:
+ case WM8280:
+ switch (arizona->rev) {
+ case 0 ... 2:
+ break;
+ default:
+ info->micd_clamp = true;
+ info->hpdet_ip_version = 2;
+ break;
+ }
+ break;
+ case WM8998:
+ case WM1814:
+ info->micd_clamp = true;
+ info->hpdet_ip_version = 2;
+ break;
+ default:
+ break;
+ }
+
+ info->edev = devm_extcon_dev_allocate(&pdev->dev, arizona_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret < 0) {
+ dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
+ ret);
+ return ret;
+ }
+
+ info->input = devm_input_allocate_device(&pdev->dev);
+ if (!info->input) {
+ dev_err(arizona->dev, "Can't allocate input dev\n");
+ ret = -ENOMEM;
+ goto err_register;
+ }
+
+ info->input->name = "Headset";
+ info->input->phys = "arizona/extcon";
+
+ if (pdata->num_micd_configs) {
+ info->micd_modes = pdata->micd_configs;
+ info->micd_num_modes = pdata->num_micd_configs;
+ } else {
+ info->micd_modes = micd_default_modes;
+ info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
+ }
+
+ if (arizona->pdata.gpsw > 0)
+ regmap_update_bits(arizona->regmap, ARIZONA_GP_SWITCH_1,
+ ARIZONA_SW1_MODE_MASK, arizona->pdata.gpsw);
+
+ if (pdata->micd_pol_gpio > 0) {
+ if (info->micd_modes[0].gpio)
+ mode = GPIOF_OUT_INIT_HIGH;
+ else
+ mode = GPIOF_OUT_INIT_LOW;
+
+ ret = devm_gpio_request_one(&pdev->dev, pdata->micd_pol_gpio,
+ mode, "MICD polarity");
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
+ pdata->micd_pol_gpio, ret);
+ goto err_register;
+ }
+
+ info->micd_pol_gpio = gpio_to_desc(pdata->micd_pol_gpio);
+ } else {
+ if (info->micd_modes[0].gpio)
+ mode = GPIOD_OUT_HIGH;
+ else
+ mode = GPIOD_OUT_LOW;
+
+ /* We can't use devm here because we need to do the get
+ * against the MFD device, as that is where the of_node
+ * will reside, but if we devm against that the GPIO
+ * will not be freed if the extcon driver is unloaded.
+ */
+ info->micd_pol_gpio = gpiod_get_optional(arizona->dev,
+ "wlf,micd-pol",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(info->micd_pol_gpio)) {
+ ret = PTR_ERR(info->micd_pol_gpio);
+ dev_err(arizona->dev,
+ "Failed to get microphone polarity GPIO: %d\n",
+ ret);
+ goto err_register;
+ }
+ }
+
+ if (arizona->pdata.hpdet_id_gpio > 0) {
+ ret = devm_gpio_request_one(&pdev->dev,
+ arizona->pdata.hpdet_id_gpio,
+ GPIOF_OUT_INIT_LOW,
+ "HPDET");
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
+ arizona->pdata.hpdet_id_gpio, ret);
+ goto err_gpio;
+ }
+ }
+
+ if (arizona->pdata.micd_bias_start_time)
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_STARTTIME_MASK,
+ arizona->pdata.micd_bias_start_time
+ << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
+
+ if (arizona->pdata.micd_rate)
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_RATE_MASK,
+ arizona->pdata.micd_rate
+ << ARIZONA_MICD_RATE_SHIFT);
+
+ switch (arizona->pdata.micd_dbtime) {
+ case MICD_DBTIME_FOUR_READINGS:
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_DBTIME_MASK,
+ ARIZONA_MICD_DBTIME);
+ break;
+ case MICD_DBTIME_TWO_READINGS:
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_DBTIME_MASK, 0);
+ break;
+ default:
+ break;
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) <
+ ARIZONA_NUM_MICD_BUTTON_LEVELS);
+
+ if (arizona->pdata.num_micd_ranges) {
+ info->micd_ranges = pdata->micd_ranges;
+ info->num_micd_ranges = pdata->num_micd_ranges;
+ } else {
+ info->micd_ranges = micd_default_ranges;
+ info->num_micd_ranges = ARRAY_SIZE(micd_default_ranges);
+ }
+
+ if (arizona->pdata.num_micd_ranges > ARIZONA_MAX_MICD_RANGE) {
+ dev_err(arizona->dev, "Too many MICD ranges: %d\n",
+ arizona->pdata.num_micd_ranges);
+ }
+
+ if (info->num_micd_ranges > 1) {
+ for (i = 1; i < info->num_micd_ranges; i++) {
+ if (info->micd_ranges[i - 1].max >
+ info->micd_ranges[i].max) {
+ dev_err(arizona->dev,
+ "MICD ranges must be sorted\n");
+ ret = -EINVAL;
+ goto err_gpio;
+ }
+ }
+ }
+
+ /* Disable all buttons by default */
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
+ ARIZONA_MICD_LVL_SEL_MASK, 0x81);
+
+ /* Set up all the buttons the user specified */
+ for (i = 0; i < info->num_micd_ranges; i++) {
+ for (j = 0; j < ARIZONA_NUM_MICD_BUTTON_LEVELS; j++)
+ if (arizona_micd_levels[j] >= info->micd_ranges[i].max)
+ break;
+
+ if (j == ARIZONA_NUM_MICD_BUTTON_LEVELS) {
+ dev_err(arizona->dev, "Unsupported MICD level %d\n",
+ info->micd_ranges[i].max);
+ ret = -EINVAL;
+ goto err_gpio;
+ }
+
+ dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n",
+ arizona_micd_levels[j], i);
+
+ arizona_micd_set_level(arizona, i, j);
+ input_set_capability(info->input, EV_KEY,
+ info->micd_ranges[i].key);
+
+ /* Enable reporting of that range */
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
+ 1 << i, 1 << i);
+ }
+
+ /* Set all the remaining keys to a maximum */
+ for (; i < ARIZONA_MAX_MICD_RANGE; i++)
+ arizona_micd_set_level(arizona, i, 0x3f);
+
+ /*
+ * If we have a clamp use it, activating in conjunction with
+ * GPIO5 if that is connected for jack detect operation.
+ */
+ if (info->micd_clamp) {
+ if (arizona->pdata.jd_gpio5) {
+ /* Put the GPIO into input mode with optional pull */
+ val = 0xc101;
+ if (arizona->pdata.jd_gpio5_nopull)
+ val &= ~ARIZONA_GPN_PU;
+
+ regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
+ val);
+
+ if (arizona->pdata.jd_invert)
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH_GP5H;
+ else
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL_GP5H;
+ } else {
+ if (arizona->pdata.jd_invert)
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH;
+ else
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL;
+ }
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, clamp_mode);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB,
+ ARIZONA_MICD_CLAMP_DB);
+ }
+
+ arizona_extcon_set_mode(info, 0);
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_idle(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ if (info->micd_clamp) {
+ jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
+ jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
+ } else {
+ jack_irq_rise = ARIZONA_IRQ_JD_RISE;
+ jack_irq_fall = ARIZONA_IRQ_JD_FALL;
+ }
+
+ ret = arizona_request_irq(arizona, jack_irq_rise,
+ "JACKDET rise", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
+ ret);
+ goto err_gpio;
+ }
+
+ ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
+ ret);
+ goto err_rise;
+ }
+
+ ret = arizona_request_irq(arizona, jack_irq_fall,
+ "JACKDET fall", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
+ goto err_rise_wake;
+ }
+
+ ret = arizona_set_irq_wake(arizona, jack_irq_fall, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
+ ret);
+ goto err_fall;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
+ "MICDET", arizona_micdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
+ goto err_fall_wake;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_HPDET,
+ "HPDET", arizona_hpdet_irq, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get HPDET IRQ: %d\n", ret);
+ goto err_micdet;
+ }
+
+ arizona_clk32k_enable(arizona);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_JD1_DB, ARIZONA_JD1_DB);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
+
+ ret = regulator_allow_bypass(info->micvdd, true);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
+ ret);
+
+ pm_runtime_put(&pdev->dev);
+
+ ret = input_register_device(info->input);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
+ goto err_hpdet;
+ }
+
+ return 0;
+
+err_hpdet:
+ arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
+err_micdet:
+ arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
+err_fall_wake:
+ arizona_set_irq_wake(arizona, jack_irq_fall, 0);
+err_fall:
+ arizona_free_irq(arizona, jack_irq_fall, info);
+err_rise_wake:
+ arizona_set_irq_wake(arizona, jack_irq_rise, 0);
+err_rise:
+ arizona_free_irq(arizona, jack_irq_rise, info);
+err_gpio:
+ gpiod_put(info->micd_pol_gpio);
+err_register:
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static int arizona_extcon_remove(struct platform_device *pdev)
+{
+ struct arizona_extcon_info *info = platform_get_drvdata(pdev);
+ struct arizona *arizona = info->arizona;
+ int jack_irq_rise, jack_irq_fall;
+
+ gpiod_put(info->micd_pol_gpio);
+
+ pm_runtime_disable(&pdev->dev);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, 0);
+
+ if (info->micd_clamp) {
+ jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
+ jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
+ } else {
+ jack_irq_rise = ARIZONA_IRQ_JD_RISE;
+ jack_irq_fall = ARIZONA_IRQ_JD_FALL;
+ }
+
+ arizona_set_irq_wake(arizona, jack_irq_rise, 0);
+ arizona_set_irq_wake(arizona, jack_irq_fall, 0);
+ arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
+ arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
+ arizona_free_irq(arizona, jack_irq_rise, info);
+ arizona_free_irq(arizona, jack_irq_fall, info);
+ cancel_delayed_work_sync(&info->hpdet_work);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, 0);
+ arizona_clk32k_disable(arizona);
+
+ return 0;
+}
+
+static struct platform_driver arizona_extcon_driver = {
+ .driver = {
+ .name = "arizona-extcon",
+ },
+ .probe = arizona_extcon_probe,
+ .remove = arizona_extcon_remove,
+};
+
+module_platform_driver(arizona_extcon_driver);
+
+MODULE_DESCRIPTION("Arizona Extcon driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-arizona");
diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
new file mode 100644
index 0000000..a983708
--- /dev/null
+++ b/drivers/extcon/extcon-axp288.c
@@ -0,0 +1,475 @@
+/*
+ * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
+ *
+ * Copyright (c) 2017-2018 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (C) 2015 Intel Corporation
+ * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/notifier.h>
+#include <linux/extcon-provider.h>
+#include <linux/regmap.h>
+#include <linux/mfd/axp20x.h>
+#include <linux/usb/role.h>
+#include <linux/workqueue.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+
+/* Power source status register */
+#define PS_STAT_VBUS_TRIGGER BIT(0)
+#define PS_STAT_BAT_CHRG_DIR BIT(2)
+#define PS_STAT_VBUS_ABOVE_VHOLD BIT(3)
+#define PS_STAT_VBUS_VALID BIT(4)
+#define PS_STAT_VBUS_PRESENT BIT(5)
+
+/* BC module global register */
+#define BC_GLOBAL_RUN BIT(0)
+#define BC_GLOBAL_DET_STAT BIT(2)
+#define BC_GLOBAL_DBP_TOUT BIT(3)
+#define BC_GLOBAL_VLGC_COM_SEL BIT(4)
+#define BC_GLOBAL_DCD_TOUT_MASK (BIT(6)|BIT(5))
+#define BC_GLOBAL_DCD_TOUT_300MS 0
+#define BC_GLOBAL_DCD_TOUT_100MS 1
+#define BC_GLOBAL_DCD_TOUT_500MS 2
+#define BC_GLOBAL_DCD_TOUT_900MS 3
+#define BC_GLOBAL_DCD_DET_SEL BIT(7)
+
+/* BC module vbus control and status register */
+#define VBUS_CNTL_DPDM_PD_EN BIT(4)
+#define VBUS_CNTL_DPDM_FD_EN BIT(5)
+#define VBUS_CNTL_FIRST_PO_STAT BIT(6)
+
+/* BC USB status register */
+#define USB_STAT_BUS_STAT_MASK (BIT(3)|BIT(2)|BIT(1)|BIT(0))
+#define USB_STAT_BUS_STAT_SHIFT 0
+#define USB_STAT_BUS_STAT_ATHD 0
+#define USB_STAT_BUS_STAT_CONN 1
+#define USB_STAT_BUS_STAT_SUSP 2
+#define USB_STAT_BUS_STAT_CONF 3
+#define USB_STAT_USB_SS_MODE BIT(4)
+#define USB_STAT_DEAD_BAT_DET BIT(6)
+#define USB_STAT_DBP_UNCFG BIT(7)
+
+/* BC detect status register */
+#define DET_STAT_MASK (BIT(7)|BIT(6)|BIT(5))
+#define DET_STAT_SHIFT 5
+#define DET_STAT_SDP 1
+#define DET_STAT_CDP 2
+#define DET_STAT_DCP 3
+
+enum axp288_extcon_reg {
+ AXP288_PS_STAT_REG = 0x00,
+ AXP288_PS_BOOT_REASON_REG = 0x02,
+ AXP288_BC_GLOBAL_REG = 0x2c,
+ AXP288_BC_VBUS_CNTL_REG = 0x2d,
+ AXP288_BC_USB_STAT_REG = 0x2e,
+ AXP288_BC_DET_STAT_REG = 0x2f,
+};
+
+enum axp288_extcon_irq {
+ VBUS_FALLING_IRQ = 0,
+ VBUS_RISING_IRQ,
+ MV_CHNG_IRQ,
+ BC_USB_CHNG_IRQ,
+ EXTCON_IRQ_END,
+};
+
+static const unsigned int axp288_extcon_cables[] = {
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_USB,
+ EXTCON_NONE,
+};
+
+struct axp288_extcon_info {
+ struct device *dev;
+ struct regmap *regmap;
+ struct regmap_irq_chip_data *regmap_irqc;
+ struct usb_role_switch *role_sw;
+ struct work_struct role_work;
+ int irq[EXTCON_IRQ_END];
+ struct extcon_dev *edev;
+ struct extcon_dev *id_extcon;
+ struct notifier_block id_nb;
+ unsigned int previous_cable;
+ bool vbus_attach;
+};
+
+static const struct x86_cpu_id cherry_trail_cpu_ids[] = {
+ { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT, X86_FEATURE_ANY },
+ {}
+};
+
+/* Power up/down reason string array */
+static const char * const axp288_pwr_up_down_info[] = {
+ "Last wake caused by user pressing the power button",
+ "Last wake caused by a charger insertion",
+ "Last wake caused by a battery insertion",
+ "Last wake caused by SOC initiated global reset",
+ "Last wake caused by cold reset",
+ "Last shutdown caused by PMIC UVLO threshold",
+ "Last shutdown caused by SOC initiated cold off",
+ "Last shutdown caused by user pressing the power button",
+ NULL,
+};
+
+/*
+ * Decode and log the given "reset source indicator" (rsi)
+ * register and then clear it.
+ */
+static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
+{
+ const char * const *rsi;
+ unsigned int val, i, clear_mask = 0;
+ int ret;
+
+ ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
+ for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
+ if (val & BIT(i)) {
+ dev_dbg(info->dev, "%s\n", *rsi);
+ clear_mask |= BIT(i);
+ }
+ }
+
+ /* Clear the register value for next reboot (write 1 to clear bit) */
+ regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
+}
+
+/*
+ * The below code to control the USB role-switch on devices with an AXP288
+ * may seem out of place, but there are 2 reasons why this is the best place
+ * to control the USB role-switch on such devices:
+ * 1) On many devices the USB role is controlled by AML code, but the AML code
+ * only switches between the host and none roles, because of Windows not
+ * really using device mode. To make device mode work we need to toggle
+ * between the none/device roles based on Vbus presence, and this driver
+ * gets interrupts on Vbus insertion / removal.
+ * 2) In order for our BC1.2 charger detection to work properly the role
+ * mux must be properly set to device mode before we do the detection.
+ */
+
+/* Returns the id-pin value, note pulled low / false == host-mode */
+static bool axp288_get_id_pin(struct axp288_extcon_info *info)
+{
+ enum usb_role role;
+
+ if (info->id_extcon)
+ return extcon_get_state(info->id_extcon, EXTCON_USB_HOST) <= 0;
+
+ /* We cannot access the id-pin, see what mode the AML code has set */
+ role = usb_role_switch_get_role(info->role_sw);
+ return role != USB_ROLE_HOST;
+}
+
+static void axp288_usb_role_work(struct work_struct *work)
+{
+ struct axp288_extcon_info *info =
+ container_of(work, struct axp288_extcon_info, role_work);
+ enum usb_role role;
+ bool id_pin;
+ int ret;
+
+ id_pin = axp288_get_id_pin(info);
+ if (!id_pin)
+ role = USB_ROLE_HOST;
+ else if (info->vbus_attach)
+ role = USB_ROLE_DEVICE;
+ else
+ role = USB_ROLE_NONE;
+
+ ret = usb_role_switch_set_role(info->role_sw, role);
+ if (ret)
+ dev_err(info->dev, "failed to set role: %d\n", ret);
+}
+
+static bool axp288_get_vbus_attach(struct axp288_extcon_info *info)
+{
+ int ret, pwr_stat;
+
+ ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to read vbus status\n");
+ return false;
+ }
+
+ return !!(pwr_stat & PS_STAT_VBUS_VALID);
+}
+
+static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
+{
+ int ret, stat, cfg;
+ u8 chrg_type;
+ unsigned int cable = info->previous_cable;
+ bool vbus_attach = false;
+
+ vbus_attach = axp288_get_vbus_attach(info);
+ if (!vbus_attach)
+ goto no_vbus;
+
+ /* Check charger detection completion status */
+ ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg);
+ if (ret < 0)
+ goto dev_det_ret;
+ if (cfg & BC_GLOBAL_DET_STAT) {
+ dev_dbg(info->dev, "can't complete the charger detection\n");
+ goto dev_det_ret;
+ }
+
+ ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat);
+ if (ret < 0)
+ goto dev_det_ret;
+
+ chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT;
+
+ switch (chrg_type) {
+ case DET_STAT_SDP:
+ dev_dbg(info->dev, "sdp cable is connected\n");
+ cable = EXTCON_CHG_USB_SDP;
+ break;
+ case DET_STAT_CDP:
+ dev_dbg(info->dev, "cdp cable is connected\n");
+ cable = EXTCON_CHG_USB_CDP;
+ break;
+ case DET_STAT_DCP:
+ dev_dbg(info->dev, "dcp cable is connected\n");
+ cable = EXTCON_CHG_USB_DCP;
+ break;
+ default:
+ dev_warn(info->dev, "unknown (reserved) bc detect result\n");
+ cable = EXTCON_CHG_USB_SDP;
+ }
+
+no_vbus:
+ extcon_set_state_sync(info->edev, info->previous_cable, false);
+ if (info->previous_cable == EXTCON_CHG_USB_SDP)
+ extcon_set_state_sync(info->edev, EXTCON_USB, false);
+
+ if (vbus_attach) {
+ extcon_set_state_sync(info->edev, cable, vbus_attach);
+ if (cable == EXTCON_CHG_USB_SDP)
+ extcon_set_state_sync(info->edev, EXTCON_USB,
+ vbus_attach);
+
+ info->previous_cable = cable;
+ }
+
+ if (info->role_sw && info->vbus_attach != vbus_attach) {
+ info->vbus_attach = vbus_attach;
+ /* Setting the role can take a while */
+ queue_work(system_long_wq, &info->role_work);
+ }
+
+ return 0;
+
+dev_det_ret:
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect BC Mod\n");
+
+ return ret;
+}
+
+static int axp288_extcon_id_evt(struct notifier_block *nb,
+ unsigned long event, void *param)
+{
+ struct axp288_extcon_info *info =
+ container_of(nb, struct axp288_extcon_info, id_nb);
+
+ /* We may not sleep and setting the role can take a while */
+ queue_work(system_long_wq, &info->role_work);
+
+ return NOTIFY_OK;
+}
+
+static irqreturn_t axp288_extcon_isr(int irq, void *data)
+{
+ struct axp288_extcon_info *info = data;
+ int ret;
+
+ ret = axp288_handle_chrg_det_event(info);
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle the interrupt\n");
+
+ return IRQ_HANDLED;
+}
+
+static void axp288_extcon_enable(struct axp288_extcon_info *info)
+{
+ regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
+ BC_GLOBAL_RUN, 0);
+ /* Enable the charger detection logic */
+ regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
+ BC_GLOBAL_RUN, BC_GLOBAL_RUN);
+}
+
+static void axp288_put_role_sw(void *data)
+{
+ struct axp288_extcon_info *info = data;
+
+ cancel_work_sync(&info->role_work);
+ usb_role_switch_put(info->role_sw);
+}
+
+static int axp288_extcon_probe(struct platform_device *pdev)
+{
+ struct axp288_extcon_info *info;
+ struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ const char *name;
+ int ret, i, pirq;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->regmap = axp20x->regmap;
+ info->regmap_irqc = axp20x->regmap_irqc;
+ info->previous_cable = EXTCON_NONE;
+ INIT_WORK(&info->role_work, axp288_usb_role_work);
+ info->id_nb.notifier_call = axp288_extcon_id_evt;
+
+ platform_set_drvdata(pdev, info);
+
+ info->role_sw = usb_role_switch_get(dev);
+ if (IS_ERR(info->role_sw))
+ return PTR_ERR(info->role_sw);
+ if (info->role_sw) {
+ ret = devm_add_action_or_reset(dev, axp288_put_role_sw, info);
+ if (ret)
+ return ret;
+
+ name = acpi_dev_get_first_match_name("INT3496", NULL, -1);
+ if (name) {
+ info->id_extcon = extcon_get_extcon_dev(name);
+ if (!info->id_extcon)
+ return -EPROBE_DEFER;
+
+ dev_info(dev, "controlling USB role\n");
+ } else {
+ dev_info(dev, "controlling USB role based on Vbus presence\n");
+ }
+ }
+
+ info->vbus_attach = axp288_get_vbus_attach(info);
+
+ axp288_extcon_log_rsi(info);
+
+ /* Initialize extcon device */
+ info->edev = devm_extcon_dev_allocate(&pdev->dev,
+ axp288_extcon_cables);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ return PTR_ERR(info->edev);
+ }
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ for (i = 0; i < EXTCON_IRQ_END; i++) {
+ pirq = platform_get_irq(pdev, i);
+ if (pirq < 0)
+ return pirq;
+
+ info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
+ if (info->irq[i] < 0) {
+ dev_err(&pdev->dev,
+ "failed to get virtual interrupt=%d\n", pirq);
+ ret = info->irq[i];
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, info->irq[i],
+ NULL, axp288_extcon_isr,
+ IRQF_ONESHOT | IRQF_NO_SUSPEND,
+ pdev->name, info);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request interrupt=%d\n",
+ info->irq[i]);
+ return ret;
+ }
+ }
+
+ if (info->id_extcon) {
+ ret = devm_extcon_register_notifier_all(dev, info->id_extcon,
+ &info->id_nb);
+ if (ret)
+ return ret;
+ }
+
+ /* Make sure the role-sw is set correctly before doing BC detection */
+ if (info->role_sw) {
+ queue_work(system_long_wq, &info->role_work);
+ flush_work(&info->role_work);
+ }
+
+ /* Start charger cable type detection */
+ axp288_extcon_enable(info);
+
+ return 0;
+}
+
+static const struct platform_device_id axp288_extcon_table[] = {
+ { .name = "axp288_extcon" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, axp288_extcon_table);
+
+static struct platform_driver axp288_extcon_driver = {
+ .probe = axp288_extcon_probe,
+ .id_table = axp288_extcon_table,
+ .driver = {
+ .name = "axp288_extcon",
+ },
+};
+
+static struct device_connection axp288_extcon_role_sw_conn = {
+ .endpoint[0] = "axp288_extcon",
+ .endpoint[1] = "intel_xhci_usb_sw-role-switch",
+ .id = "usb-role-switch",
+};
+
+static int __init axp288_extcon_init(void)
+{
+ if (x86_match_cpu(cherry_trail_cpu_ids))
+ device_connection_add(&axp288_extcon_role_sw_conn);
+
+ return platform_driver_register(&axp288_extcon_driver);
+}
+module_init(axp288_extcon_init);
+
+static void __exit axp288_extcon_exit(void)
+{
+ if (x86_match_cpu(cherry_trail_cpu_ids))
+ device_connection_remove(&axp288_extcon_role_sw_conn);
+
+ platform_driver_unregister(&axp288_extcon_driver);
+}
+module_exit(axp288_extcon_exit);
+
+MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
new file mode 100644
index 0000000..13ba3a6
--- /dev/null
+++ b/drivers/extcon/extcon-gpio.c
@@ -0,0 +1,171 @@
+/*
+ * extcon_gpio.c - Single-state GPIO extcon driver based on extcon class
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * Modified by MyungJoo Ham <myungjoo.ham@samsung.com> to support extcon
+ * (originally switch class is supported)
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+/**
+ * struct gpio_extcon_data - A simple GPIO-controlled extcon device state container.
+ * @edev: Extcon device.
+ * @irq: Interrupt line for the external connector.
+ * @work: Work fired by the interrupt.
+ * @debounce_jiffies: Number of jiffies to wait for the GPIO to stabilize, from the debounce
+ * value.
+ * @gpiod: GPIO descriptor for this external connector.
+ * @extcon_id: The unique id of specific external connector.
+ * @debounce: Debounce time for GPIO IRQ in ms.
+ * @irq_flags: IRQ Flags (e.g., IRQF_TRIGGER_LOW).
+ * @check_on_resume: Boolean describing whether to check the state of gpio
+ * while resuming from sleep.
+ */
+struct gpio_extcon_data {
+ struct extcon_dev *edev;
+ int irq;
+ struct delayed_work work;
+ unsigned long debounce_jiffies;
+ struct gpio_desc *gpiod;
+ unsigned int extcon_id;
+ unsigned long debounce;
+ unsigned long irq_flags;
+ bool check_on_resume;
+};
+
+static void gpio_extcon_work(struct work_struct *work)
+{
+ int state;
+ struct gpio_extcon_data *data =
+ container_of(to_delayed_work(work), struct gpio_extcon_data,
+ work);
+
+ state = gpiod_get_value_cansleep(data->gpiod);
+ extcon_set_state_sync(data->edev, data->extcon_id, state);
+}
+
+static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
+{
+ struct gpio_extcon_data *data = dev_id;
+
+ queue_delayed_work(system_power_efficient_wq, &data->work,
+ data->debounce_jiffies);
+ return IRQ_HANDLED;
+}
+
+static int gpio_extcon_probe(struct platform_device *pdev)
+{
+ struct gpio_extcon_data *data;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ data = devm_kzalloc(dev, sizeof(struct gpio_extcon_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /*
+ * FIXME: extcon_id represents the unique identifier of external
+ * connectors such as EXTCON_USB, EXTCON_DISP_HDMI and so on. extcon_id
+ * is necessary to register the extcon device. But, it's not yet
+ * developed to get the extcon id from device-tree or others.
+ * On later, it have to be solved.
+ */
+ if (!data->irq_flags || data->extcon_id > EXTCON_NONE)
+ return -EINVAL;
+
+ data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN);
+ if (IS_ERR(data->gpiod))
+ return PTR_ERR(data->gpiod);
+ data->irq = gpiod_to_irq(data->gpiod);
+ if (data->irq <= 0)
+ return data->irq;
+
+ /* Allocate the memory of extcon devie and register extcon device */
+ data->edev = devm_extcon_dev_allocate(dev, &data->extcon_id);
+ if (IS_ERR(data->edev)) {
+ dev_err(dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(dev, data->edev);
+ if (ret < 0)
+ return ret;
+
+ INIT_DELAYED_WORK(&data->work, gpio_extcon_work);
+
+ /*
+ * Request the interrupt of gpio to detect whether external connector
+ * is attached or detached.
+ */
+ ret = devm_request_any_context_irq(dev, data->irq,
+ gpio_irq_handler, data->irq_flags,
+ pdev->name, data);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, data);
+ /* Perform initial detection */
+ gpio_extcon_work(&data->work.work);
+
+ return 0;
+}
+
+static int gpio_extcon_remove(struct platform_device *pdev)
+{
+ struct gpio_extcon_data *data = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&data->work);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int gpio_extcon_resume(struct device *dev)
+{
+ struct gpio_extcon_data *data;
+
+ data = dev_get_drvdata(dev);
+ if (data->check_on_resume)
+ queue_delayed_work(system_power_efficient_wq,
+ &data->work, data->debounce_jiffies);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume);
+
+static struct platform_driver gpio_extcon_driver = {
+ .probe = gpio_extcon_probe,
+ .remove = gpio_extcon_remove,
+ .driver = {
+ .name = "extcon-gpio",
+ .pm = &gpio_extcon_pm_ops,
+ },
+};
+
+module_platform_driver(gpio_extcon_driver);
+
+MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
+MODULE_DESCRIPTION("GPIO extcon driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c
new file mode 100644
index 0000000..5e1dd27
--- /dev/null
+++ b/drivers/extcon/extcon-intel-cht-wc.c
@@ -0,0 +1,399 @@
+/*
+ * Extcon charger detection driver for Intel Cherrytrail Whiskey Cove PMIC
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
+ * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define CHT_WC_PHYCTRL 0x5e07
+
+#define CHT_WC_CHGRCTRL0 0x5e16
+#define CHT_WC_CHGRCTRL0_CHGRRESET BIT(0)
+#define CHT_WC_CHGRCTRL0_EMRGCHREN BIT(1)
+#define CHT_WC_CHGRCTRL0_EXTCHRDIS BIT(2)
+#define CHT_WC_CHGRCTRL0_SWCONTROL BIT(3)
+#define CHT_WC_CHGRCTRL0_TTLCK_MASK BIT(4)
+#define CHT_WC_CHGRCTRL0_CCSM_OFF_MASK BIT(5)
+#define CHT_WC_CHGRCTRL0_DBPOFF_MASK BIT(6)
+#define CHT_WC_CHGRCTRL0_WDT_NOKICK BIT(7)
+
+#define CHT_WC_CHGRCTRL1 0x5e17
+
+#define CHT_WC_USBSRC 0x5e29
+#define CHT_WC_USBSRC_STS_MASK GENMASK(1, 0)
+#define CHT_WC_USBSRC_STS_SUCCESS 2
+#define CHT_WC_USBSRC_STS_FAIL 3
+#define CHT_WC_USBSRC_TYPE_SHIFT 2
+#define CHT_WC_USBSRC_TYPE_MASK GENMASK(5, 2)
+#define CHT_WC_USBSRC_TYPE_NONE 0
+#define CHT_WC_USBSRC_TYPE_SDP 1
+#define CHT_WC_USBSRC_TYPE_DCP 2
+#define CHT_WC_USBSRC_TYPE_CDP 3
+#define CHT_WC_USBSRC_TYPE_ACA 4
+#define CHT_WC_USBSRC_TYPE_SE1 5
+#define CHT_WC_USBSRC_TYPE_MHL 6
+#define CHT_WC_USBSRC_TYPE_FLOAT_DP_DN 7
+#define CHT_WC_USBSRC_TYPE_OTHER 8
+#define CHT_WC_USBSRC_TYPE_DCP_EXTPHY 9
+
+#define CHT_WC_PWRSRC_IRQ 0x6e03
+#define CHT_WC_PWRSRC_IRQ_MASK 0x6e0f
+#define CHT_WC_PWRSRC_STS 0x6e1e
+#define CHT_WC_PWRSRC_VBUS BIT(0)
+#define CHT_WC_PWRSRC_DC BIT(1)
+#define CHT_WC_PWRSRC_BAT BIT(2)
+#define CHT_WC_PWRSRC_ID_GND BIT(3)
+#define CHT_WC_PWRSRC_ID_FLOAT BIT(4)
+
+#define CHT_WC_VBUS_GPIO_CTLO 0x6e2d
+#define CHT_WC_VBUS_GPIO_CTLO_OUTPUT BIT(0)
+#define CHT_WC_VBUS_GPIO_CTLO_DRV_OD BIT(4)
+#define CHT_WC_VBUS_GPIO_CTLO_DIR_OUT BIT(5)
+
+enum cht_wc_usb_id {
+ USB_ID_OTG,
+ USB_ID_GND,
+ USB_ID_FLOAT,
+ USB_RID_A,
+ USB_RID_B,
+ USB_RID_C,
+};
+
+enum cht_wc_mux_select {
+ MUX_SEL_PMIC = 0,
+ MUX_SEL_SOC,
+};
+
+static const unsigned int cht_wc_extcon_cables[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_ACA,
+ EXTCON_NONE,
+};
+
+struct cht_wc_extcon_data {
+ struct device *dev;
+ struct regmap *regmap;
+ struct extcon_dev *edev;
+ unsigned int previous_cable;
+ bool usb_host;
+};
+
+static int cht_wc_extcon_get_id(struct cht_wc_extcon_data *ext, int pwrsrc_sts)
+{
+ if (pwrsrc_sts & CHT_WC_PWRSRC_ID_GND)
+ return USB_ID_GND;
+ if (pwrsrc_sts & CHT_WC_PWRSRC_ID_FLOAT)
+ return USB_ID_FLOAT;
+
+ /*
+ * Once we have iio support for the gpadc we should read the USBID
+ * gpadc channel here and determine ACA role based on that.
+ */
+ return USB_ID_FLOAT;
+}
+
+static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext,
+ bool ignore_errors)
+{
+ int ret, usbsrc, status;
+ unsigned long timeout;
+
+ /* Charger detection can take upto 600ms, wait 800ms max. */
+ timeout = jiffies + msecs_to_jiffies(800);
+ do {
+ ret = regmap_read(ext->regmap, CHT_WC_USBSRC, &usbsrc);
+ if (ret) {
+ dev_err(ext->dev, "Error reading usbsrc: %d\n", ret);
+ return ret;
+ }
+
+ status = usbsrc & CHT_WC_USBSRC_STS_MASK;
+ if (status == CHT_WC_USBSRC_STS_SUCCESS ||
+ status == CHT_WC_USBSRC_STS_FAIL)
+ break;
+
+ msleep(50); /* Wait a bit before retrying */
+ } while (time_before(jiffies, timeout));
+
+ if (status != CHT_WC_USBSRC_STS_SUCCESS) {
+ if (ignore_errors)
+ return EXTCON_CHG_USB_SDP; /* Save fallback */
+
+ if (status == CHT_WC_USBSRC_STS_FAIL)
+ dev_warn(ext->dev, "Could not detect charger type\n");
+ else
+ dev_warn(ext->dev, "Timeout detecting charger type\n");
+ return EXTCON_CHG_USB_SDP; /* Save fallback */
+ }
+
+ usbsrc = (usbsrc & CHT_WC_USBSRC_TYPE_MASK) >> CHT_WC_USBSRC_TYPE_SHIFT;
+ switch (usbsrc) {
+ default:
+ dev_warn(ext->dev,
+ "Unhandled charger type %d, defaulting to SDP\n",
+ ret);
+ /* Fall through, treat as SDP */
+ case CHT_WC_USBSRC_TYPE_SDP:
+ case CHT_WC_USBSRC_TYPE_FLOAT_DP_DN:
+ case CHT_WC_USBSRC_TYPE_OTHER:
+ return EXTCON_CHG_USB_SDP;
+ case CHT_WC_USBSRC_TYPE_CDP:
+ return EXTCON_CHG_USB_CDP;
+ case CHT_WC_USBSRC_TYPE_DCP:
+ case CHT_WC_USBSRC_TYPE_DCP_EXTPHY:
+ case CHT_WC_USBSRC_TYPE_MHL: /* MHL2+ delivers upto 2A, treat as DCP */
+ return EXTCON_CHG_USB_DCP;
+ case CHT_WC_USBSRC_TYPE_ACA:
+ return EXTCON_CHG_USB_ACA;
+ }
+}
+
+static void cht_wc_extcon_set_phymux(struct cht_wc_extcon_data *ext, u8 state)
+{
+ int ret;
+
+ ret = regmap_write(ext->regmap, CHT_WC_PHYCTRL, state);
+ if (ret)
+ dev_err(ext->dev, "Error writing phyctrl: %d\n", ret);
+}
+
+static void cht_wc_extcon_set_5v_boost(struct cht_wc_extcon_data *ext,
+ bool enable)
+{
+ int ret, val;
+
+ /*
+ * The 5V boost converter is enabled through a gpio on the PMIC, since
+ * there currently is no gpio driver we access the gpio reg directly.
+ */
+ val = CHT_WC_VBUS_GPIO_CTLO_DRV_OD | CHT_WC_VBUS_GPIO_CTLO_DIR_OUT;
+ if (enable)
+ val |= CHT_WC_VBUS_GPIO_CTLO_OUTPUT;
+
+ ret = regmap_write(ext->regmap, CHT_WC_VBUS_GPIO_CTLO, val);
+ if (ret)
+ dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret);
+}
+
+/* Small helper to sync EXTCON_CHG_USB_SDP and EXTCON_USB state */
+static void cht_wc_extcon_set_state(struct cht_wc_extcon_data *ext,
+ unsigned int cable, bool state)
+{
+ extcon_set_state_sync(ext->edev, cable, state);
+ if (cable == EXTCON_CHG_USB_SDP)
+ extcon_set_state_sync(ext->edev, EXTCON_USB, state);
+}
+
+static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext)
+{
+ int ret, pwrsrc_sts, id;
+ unsigned int cable = EXTCON_NONE;
+ /* Ignore errors in host mode, as the 5v boost converter is on then */
+ bool ignore_get_charger_errors = ext->usb_host;
+
+ ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts);
+ if (ret) {
+ dev_err(ext->dev, "Error reading pwrsrc status: %d\n", ret);
+ return;
+ }
+
+ id = cht_wc_extcon_get_id(ext, pwrsrc_sts);
+ if (id == USB_ID_GND) {
+ /* The 5v boost causes a false VBUS / SDP detect, skip */
+ goto charger_det_done;
+ }
+
+ /* Plugged into a host/charger or not connected? */
+ if (!(pwrsrc_sts & CHT_WC_PWRSRC_VBUS)) {
+ /* Route D+ and D- to PMIC for future charger detection */
+ cht_wc_extcon_set_phymux(ext, MUX_SEL_PMIC);
+ goto set_state;
+ }
+
+ ret = cht_wc_extcon_get_charger(ext, ignore_get_charger_errors);
+ if (ret >= 0)
+ cable = ret;
+
+charger_det_done:
+ /* Route D+ and D- to SoC for the host or gadget controller */
+ cht_wc_extcon_set_phymux(ext, MUX_SEL_SOC);
+
+set_state:
+ if (cable != ext->previous_cable) {
+ cht_wc_extcon_set_state(ext, cable, true);
+ cht_wc_extcon_set_state(ext, ext->previous_cable, false);
+ ext->previous_cable = cable;
+ }
+
+ ext->usb_host = ((id == USB_ID_GND) || (id == USB_RID_A));
+ extcon_set_state_sync(ext->edev, EXTCON_USB_HOST, ext->usb_host);
+}
+
+static irqreturn_t cht_wc_extcon_isr(int irq, void *data)
+{
+ struct cht_wc_extcon_data *ext = data;
+ int ret, irqs;
+
+ ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_IRQ, &irqs);
+ if (ret) {
+ dev_err(ext->dev, "Error reading irqs: %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ cht_wc_extcon_pwrsrc_event(ext);
+
+ ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ, irqs);
+ if (ret) {
+ dev_err(ext->dev, "Error writing irqs: %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int cht_wc_extcon_sw_control(struct cht_wc_extcon_data *ext, bool enable)
+{
+ int ret, mask, val;
+
+ mask = CHT_WC_CHGRCTRL0_SWCONTROL | CHT_WC_CHGRCTRL0_CCSM_OFF_MASK;
+ val = enable ? mask : 0;
+ ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL0, mask, val);
+ if (ret)
+ dev_err(ext->dev, "Error setting sw control: %d\n", ret);
+
+ return ret;
+}
+
+static int cht_wc_extcon_probe(struct platform_device *pdev)
+{
+ struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
+ struct cht_wc_extcon_data *ext;
+ int irq, ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ext = devm_kzalloc(&pdev->dev, sizeof(*ext), GFP_KERNEL);
+ if (!ext)
+ return -ENOMEM;
+
+ ext->dev = &pdev->dev;
+ ext->regmap = pmic->regmap;
+ ext->previous_cable = EXTCON_NONE;
+
+ /* Initialize extcon device */
+ ext->edev = devm_extcon_dev_allocate(ext->dev, cht_wc_extcon_cables);
+ if (IS_ERR(ext->edev))
+ return PTR_ERR(ext->edev);
+
+ /*
+ * When a host-cable is detected the BIOS enables an external 5v boost
+ * converter to power connected devices there are 2 problems with this:
+ * 1) This gets seen by the external battery charger as a valid Vbus
+ * supply and it then tries to feed Vsys from this creating a
+ * feedback loop which causes aprox. 300 mA extra battery drain
+ * (and unless we drive the external-charger-disable pin high it
+ * also tries to charge the battery causing even more feedback).
+ * 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply
+ * Since the external battery charger has its own 5v boost converter
+ * which does not have these issues, we simply turn the separate
+ * external 5v boost converter off and leave it off entirely.
+ */
+ cht_wc_extcon_set_5v_boost(ext, false);
+
+ /* Enable sw control */
+ ret = cht_wc_extcon_sw_control(ext, true);
+ if (ret)
+ return ret;
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(ext->dev, ext->edev);
+ if (ret) {
+ dev_err(ext->dev, "Error registering extcon device: %d\n", ret);
+ goto disable_sw_control;
+ }
+
+ /* Route D+ and D- to PMIC for initial charger detection */
+ cht_wc_extcon_set_phymux(ext, MUX_SEL_PMIC);
+
+ /* Get initial state */
+ cht_wc_extcon_pwrsrc_event(ext);
+
+ ret = devm_request_threaded_irq(ext->dev, irq, NULL, cht_wc_extcon_isr,
+ IRQF_ONESHOT, pdev->name, ext);
+ if (ret) {
+ dev_err(ext->dev, "Error requesting interrupt: %d\n", ret);
+ goto disable_sw_control;
+ }
+
+ /* Unmask irqs */
+ ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ_MASK,
+ (int)~(CHT_WC_PWRSRC_VBUS | CHT_WC_PWRSRC_ID_GND |
+ CHT_WC_PWRSRC_ID_FLOAT));
+ if (ret) {
+ dev_err(ext->dev, "Error writing irq-mask: %d\n", ret);
+ goto disable_sw_control;
+ }
+
+ platform_set_drvdata(pdev, ext);
+
+ return 0;
+
+disable_sw_control:
+ cht_wc_extcon_sw_control(ext, false);
+ return ret;
+}
+
+static int cht_wc_extcon_remove(struct platform_device *pdev)
+{
+ struct cht_wc_extcon_data *ext = platform_get_drvdata(pdev);
+
+ cht_wc_extcon_sw_control(ext, false);
+
+ return 0;
+}
+
+static const struct platform_device_id cht_wc_extcon_table[] = {
+ { .name = "cht_wcove_pwrsrc" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, cht_wc_extcon_table);
+
+static struct platform_driver cht_wc_extcon_driver = {
+ .probe = cht_wc_extcon_probe,
+ .remove = cht_wc_extcon_remove,
+ .id_table = cht_wc_extcon_table,
+ .driver = {
+ .name = "cht_wcove_pwrsrc",
+ },
+};
+module_platform_driver(cht_wc_extcon_driver);
+
+MODULE_DESCRIPTION("Intel Cherrytrail Whiskey Cove PMIC extcon driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-intel-int3496.c b/drivers/extcon/extcon-intel-int3496.c
new file mode 100644
index 0000000..fd24deb
--- /dev/null
+++ b/drivers/extcon/extcon-intel-int3496.c
@@ -0,0 +1,195 @@
+/*
+ * Intel INT3496 ACPI device extcon driver
+ *
+ * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on android x86 kernel code which is:
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ * Author: David Cohen <david.a.cohen@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/acpi.h>
+#include <linux/extcon-provider.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#define INT3496_GPIO_USB_ID 0
+#define INT3496_GPIO_VBUS_EN 1
+#define INT3496_GPIO_USB_MUX 2
+#define DEBOUNCE_TIME msecs_to_jiffies(50)
+
+struct int3496_data {
+ struct device *dev;
+ struct extcon_dev *edev;
+ struct delayed_work work;
+ struct gpio_desc *gpio_usb_id;
+ struct gpio_desc *gpio_vbus_en;
+ struct gpio_desc *gpio_usb_mux;
+ int usb_id_irq;
+};
+
+static const unsigned int int3496_cable[] = {
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static const struct acpi_gpio_params id_gpios = { INT3496_GPIO_USB_ID, 0, false };
+static const struct acpi_gpio_params vbus_gpios = { INT3496_GPIO_VBUS_EN, 0, false };
+static const struct acpi_gpio_params mux_gpios = { INT3496_GPIO_USB_MUX, 0, false };
+
+static const struct acpi_gpio_mapping acpi_int3496_default_gpios[] = {
+ /*
+ * Some platforms have a bug in ACPI GPIO description making IRQ
+ * GPIO to be output only. Ask the GPIO core to ignore this limit.
+ */
+ { "id-gpios", &id_gpios, 1, ACPI_GPIO_QUIRK_NO_IO_RESTRICTION },
+ { "vbus-gpios", &vbus_gpios, 1 },
+ { "mux-gpios", &mux_gpios, 1 },
+ { },
+};
+
+static void int3496_do_usb_id(struct work_struct *work)
+{
+ struct int3496_data *data =
+ container_of(work, struct int3496_data, work.work);
+ int id = gpiod_get_value_cansleep(data->gpio_usb_id);
+
+ /* id == 1: PERIPHERAL, id == 0: HOST */
+ dev_dbg(data->dev, "Connected %s cable\n", id ? "PERIPHERAL" : "HOST");
+
+ /*
+ * Peripheral: set USB mux to peripheral and disable VBUS
+ * Host: set USB mux to host and enable VBUS
+ */
+ if (!IS_ERR(data->gpio_usb_mux))
+ gpiod_direction_output(data->gpio_usb_mux, id);
+
+ if (!IS_ERR(data->gpio_vbus_en))
+ gpiod_direction_output(data->gpio_vbus_en, !id);
+
+ extcon_set_state_sync(data->edev, EXTCON_USB_HOST, !id);
+}
+
+static irqreturn_t int3496_thread_isr(int irq, void *priv)
+{
+ struct int3496_data *data = priv;
+
+ /* Let the pin settle before processing it */
+ mod_delayed_work(system_wq, &data->work, DEBOUNCE_TIME);
+
+ return IRQ_HANDLED;
+}
+
+static int int3496_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct int3496_data *data;
+ int ret;
+
+ ret = devm_acpi_dev_add_driver_gpios(dev, acpi_int3496_default_gpios);
+ if (ret) {
+ dev_err(dev, "can't add GPIO ACPI mapping\n");
+ return ret;
+ }
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->dev = dev;
+ INIT_DELAYED_WORK(&data->work, int3496_do_usb_id);
+
+ data->gpio_usb_id = devm_gpiod_get(dev, "id", GPIOD_IN);
+ if (IS_ERR(data->gpio_usb_id)) {
+ ret = PTR_ERR(data->gpio_usb_id);
+ dev_err(dev, "can't request USB ID GPIO: %d\n", ret);
+ return ret;
+ }
+
+ data->usb_id_irq = gpiod_to_irq(data->gpio_usb_id);
+ if (data->usb_id_irq < 0) {
+ dev_err(dev, "can't get USB ID IRQ: %d\n", data->usb_id_irq);
+ return data->usb_id_irq;
+ }
+
+ data->gpio_vbus_en = devm_gpiod_get(dev, "vbus", GPIOD_ASIS);
+ if (IS_ERR(data->gpio_vbus_en))
+ dev_info(dev, "can't request VBUS EN GPIO\n");
+
+ data->gpio_usb_mux = devm_gpiod_get(dev, "mux", GPIOD_ASIS);
+ if (IS_ERR(data->gpio_usb_mux))
+ dev_info(dev, "can't request USB MUX GPIO\n");
+
+ /* register extcon device */
+ data->edev = devm_extcon_dev_allocate(dev, int3496_cable);
+ if (IS_ERR(data->edev))
+ return -ENOMEM;
+
+ ret = devm_extcon_dev_register(dev, data->edev);
+ if (ret < 0) {
+ dev_err(dev, "can't register extcon device: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(dev, data->usb_id_irq,
+ NULL, int3496_thread_isr,
+ IRQF_SHARED | IRQF_ONESHOT |
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING,
+ dev_name(dev), data);
+ if (ret < 0) {
+ dev_err(dev, "can't request IRQ for USB ID GPIO: %d\n", ret);
+ return ret;
+ }
+
+ /* process id-pin so that we start with the right status */
+ queue_delayed_work(system_wq, &data->work, 0);
+ flush_delayed_work(&data->work);
+
+ platform_set_drvdata(pdev, data);
+
+ return 0;
+}
+
+static int int3496_remove(struct platform_device *pdev)
+{
+ struct int3496_data *data = platform_get_drvdata(pdev);
+
+ devm_free_irq(&pdev->dev, data->usb_id_irq, data);
+ cancel_delayed_work_sync(&data->work);
+
+ return 0;
+}
+
+static const struct acpi_device_id int3496_acpi_match[] = {
+ { "INT3496" },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, int3496_acpi_match);
+
+static struct platform_driver int3496_driver = {
+ .driver = {
+ .name = "intel-int3496",
+ .acpi_match_table = int3496_acpi_match,
+ },
+ .probe = int3496_probe,
+ .remove = int3496_remove,
+};
+
+module_platform_driver(int3496_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Intel INT3496 ACPI device extcon driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
new file mode 100644
index 0000000..b871836
--- /dev/null
+++ b/drivers/extcon/extcon-max14577.c
@@ -0,0 +1,798 @@
+/*
+ * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
+ *
+ * Copyright (C) 2013,2014 Samsung Electronics
+ * Chanwoo Choi <cw00.choi@samsung.com>
+ * Krzysztof Kozlowski <krzk@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max14577.h>
+#include <linux/mfd/max14577-private.h>
+#include <linux/extcon-provider.h>
+
+#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
+
+enum max14577_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_5MS = 0,
+ ADC_DEBOUNCE_TIME_10MS,
+ ADC_DEBOUNCE_TIME_25MS,
+ ADC_DEBOUNCE_TIME_38_62MS,
+};
+
+enum max14577_muic_status {
+ MAX14577_MUIC_STATUS1 = 0,
+ MAX14577_MUIC_STATUS2 = 1,
+ MAX14577_MUIC_STATUS_END,
+};
+
+/**
+ * struct max14577_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max14577_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max14577_muic_irq max14577_muic_irqs[] = {
+ { MAX14577_IRQ_INT1_ADC, "muic-ADC" },
+ { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
+ { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
+ { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
+ { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
+ { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
+ { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
+ { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
+};
+
+static struct max14577_muic_irq max77836_muic_irqs[] = {
+ { MAX14577_IRQ_INT1_ADC, "muic-ADC" },
+ { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
+ { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
+ { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" },
+ { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
+ { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
+ { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
+ { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
+ { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
+ { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" },
+};
+
+struct max14577_muic_info {
+ struct device *dev;
+ struct max14577 *max14577;
+ struct extcon_dev *edev;
+ int prev_cable_type;
+ int prev_chg_type;
+ u8 status[MAX14577_MUIC_STATUS_END];
+
+ struct max14577_muic_irq *muic_irqs;
+ unsigned int muic_irqs_num;
+ bool irq_adc;
+ bool irq_chg;
+ struct work_struct irq_work;
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
+
+enum max14577_muic_cable_group {
+ MAX14577_CABLE_GROUP_ADC = 0,
+ MAX14577_CABLE_GROUP_CHG,
+};
+
+/* Define supported accessory type */
+enum max14577_muic_acc_type {
+ MAX14577_MUIC_ADC_GROUND = 0x0,
+ MAX14577_MUIC_ADC_SEND_END_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX14577_MUIC_ADC_RESERVED_ACC_1,
+ MAX14577_MUIC_ADC_RESERVED_ACC_2,
+ MAX14577_MUIC_ADC_RESERVED_ACC_3,
+ MAX14577_MUIC_ADC_RESERVED_ACC_4,
+ MAX14577_MUIC_ADC_RESERVED_ACC_5,
+ MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
+ MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX14577_MUIC_ADC_TTY_CONVERTER,
+ MAX14577_MUIC_ADC_UART_CABLE,
+ MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
+ MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
+ MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
+ MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
+ MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
+ MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
+ MAX14577_MUIC_ADC_OPEN,
+};
+
+static const unsigned int max14577_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_FAST,
+ EXTCON_CHG_USB_SLOW,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_JIG,
+ EXTCON_NONE,
+};
+
+/*
+ * max14577_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max14577 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
+ enum max14577_muic_adc_debounce_time time)
+{
+ u8 ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max14577_update_reg(info->max14577->regmap,
+ MAX14577_MUIC_REG_CONTROL3,
+ CTRL3_ADCDBSET_MASK,
+ time << CTRL3_ADCDBSET_SHIFT);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
+ * max14577_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max14577 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max14577 MUIC device share outside H/W line among a varity of cables
+ * so, this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max14577_muic_set_path(struct max14577_muic_info *info,
+ u8 val, bool attached)
+{
+ u8 ctrl1, ctrl2 = 0;
+ int ret;
+
+ /* Set open state to path before changing hw path */
+ ret = max14577_update_reg(info->max14577->regmap,
+ MAX14577_MUIC_REG_CONTROL1,
+ CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CTRL1_SW_OPEN;
+
+ ret = max14577_update_reg(info->max14577->regmap,
+ MAX14577_MUIC_REG_CONTROL1,
+ CLEAR_IDBEN_MICEN_MASK, ctrl1);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ if (attached)
+ ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max14577_update_reg(info->max14577->regmap,
+ MAX14577_REG_CONTROL2,
+ CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ dev_dbg(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+/*
+ * max14577_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max14577 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - max14577_CABLE_GROUP_ADC
+ * - max14577_CABLE_GROUP_CHG
+ */
+static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
+ enum max14577_muic_cable_group group, bool *attached)
+{
+ int cable_type = 0;
+ int adc;
+ int chg_type;
+
+ switch (group) {
+ case MAX14577_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX14577_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX14577_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[MAX14577_MUIC_STATUS2] &
+ STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
+static int max14577_muic_jig_handler(struct max14577_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret = 0;
+ u8 path = CTRL1_SW_OPEN;
+
+ dev_dbg(info->dev,
+ "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
+ /* PATH:AP_USB */
+ path = CTRL1_SW_USB;
+ break;
+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
+ /* PATH:AP_UART */
+ path = CTRL1_SW_UART;
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s jig cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ ret = max14577_muic_set_path(info, path, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
+
+ return 0;
+}
+
+static int max14577_muic_adc_handler(struct max14577_muic_info *info)
+{
+ int cable_type;
+ bool attached;
+ int ret = 0;
+
+ /* Check accessory state which is either detached or attached */
+ cable_type = max14577_muic_get_cable_type(info,
+ MAX14577_CABLE_GROUP_ADC, &attached);
+
+ dev_dbg(info->dev,
+ "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type,
+ info->prev_cable_type);
+
+ switch (cable_type) {
+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ /* JIG */
+ ret = max14577_muic_jig_handler(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX14577_MUIC_ADC_GROUND:
+ case MAX14577_MUIC_ADC_SEND_END_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX14577_MUIC_ADC_RESERVED_ACC_1:
+ case MAX14577_MUIC_ADC_RESERVED_ACC_2:
+ case MAX14577_MUIC_ADC_RESERVED_ACC_3:
+ case MAX14577_MUIC_ADC_RESERVED_ACC_4:
+ case MAX14577_MUIC_ADC_RESERVED_ACC_5:
+ case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
+ case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX14577_MUIC_ADC_TTY_CONVERTER:
+ case MAX14577_MUIC_ADC_UART_CABLE:
+ case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
+ case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
+ /*
+ * This accessory isn't used in general case if it is specially
+ * needed to detect additional accessory, should implement
+ * proper operation when this accessory is attached/detached.
+ */
+ dev_info(info->dev,
+ "accessory is %s but it isn't used (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max14577_muic_chg_handler(struct max14577_muic_info *info)
+{
+ int chg_type;
+ bool attached;
+ int ret = 0;
+
+ chg_type = max14577_muic_get_cable_type(info,
+ MAX14577_CABLE_GROUP_CHG, &attached);
+
+ dev_dbg(info->dev,
+ "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+ attached ? "attached" : "detached",
+ chg_type, info->prev_chg_type);
+
+ switch (chg_type) {
+ case MAX14577_CHARGER_TYPE_USB:
+ /* PATH:AP_USB */
+ ret = max14577_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB, attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+ break;
+ case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ attached);
+ break;
+ case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
+ attached);
+ break;
+ case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
+ attached);
+ break;
+ case MAX14577_CHARGER_TYPE_SPECIAL_1A:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
+ attached);
+ break;
+ case MAX14577_CHARGER_TYPE_NONE:
+ case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (chg_type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void max14577_muic_irq_work(struct work_struct *work)
+{
+ struct max14577_muic_info *info = container_of(work,
+ struct max14577_muic_info, irq_work);
+ int ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ ret = max14577_bulk_read(info->max14577->regmap,
+ MAX14577_MUIC_REG_STATUS1, info->status, 2);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ if (info->irq_adc) {
+ ret = max14577_muic_adc_handler(info);
+ info->irq_adc = false;
+ }
+ if (info->irq_chg) {
+ ret = max14577_muic_chg_handler(info);
+ info->irq_chg = false;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
+{
+ switch (irq_type) {
+ case MAX14577_IRQ_INT1_ADC:
+ case MAX14577_IRQ_INT1_ADCLOW:
+ case MAX14577_IRQ_INT1_ADCERR:
+ /*
+ * Handle all of accessory except for
+ * type of charger accessory.
+ */
+ info->irq_adc = true;
+ return 1;
+ case MAX14577_IRQ_INT2_CHGTYP:
+ case MAX14577_IRQ_INT2_CHGDETRUN:
+ case MAX14577_IRQ_INT2_DCDTMR:
+ case MAX14577_IRQ_INT2_DBCHG:
+ case MAX14577_IRQ_INT2_VBVOLT:
+ /* Handle charger accessory */
+ info->irq_chg = true;
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
+{
+ /* First check common max14577 interrupts */
+ if (max14577_parse_irq(info, irq_type))
+ return 1;
+
+ switch (irq_type) {
+ case MAX77836_IRQ_INT1_ADC1K:
+ info->irq_adc = true;
+ return 1;
+ case MAX77836_IRQ_INT2_VIDRM:
+ /* Handle charger accessory */
+ info->irq_chg = true;
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
+{
+ struct max14577_muic_info *info = data;
+ int i, irq_type = -1;
+ bool irq_parsed;
+
+ /*
+ * We may be called multiple times for different nested IRQ-s.
+ * Including changes in INT1_ADC and INT2_CGHTYP at once.
+ * However we only need to know whether it was ADC, charger
+ * or both interrupts so decode IRQ and turn on proper flags.
+ */
+ for (i = 0; i < info->muic_irqs_num; i++)
+ if (irq == info->muic_irqs[i].virq)
+ irq_type = info->muic_irqs[i].irq;
+
+ switch (info->max14577->dev_type) {
+ case MAXIM_DEVICE_TYPE_MAX77836:
+ irq_parsed = max77836_parse_irq(info, irq_type);
+ break;
+ case MAXIM_DEVICE_TYPE_MAX14577:
+ default:
+ irq_parsed = max14577_parse_irq(info, irq_type);
+ break;
+ }
+
+ if (!irq_parsed) {
+ dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
+ irq_type);
+ return IRQ_HANDLED;
+ }
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
+{
+ int ret = 0;
+ int adc;
+ int chg_type;
+ bool attached;
+
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max14577_bulk_read(info->max14577->regmap,
+ MAX14577_MUIC_REG_STATUS1, info->status, 2);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+
+ adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
+ ret = max14577_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
+ ret = max14577_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
+
+static void max14577_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max14577_muic_info *info = container_of(to_delayed_work(work),
+ struct max14577_muic_info, wq_detcable);
+
+ max14577_muic_detect_accessory(info);
+}
+
+static int max14577_muic_probe(struct platform_device *pdev)
+{
+ struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
+ struct max14577_muic_info *info;
+ int delay_jiffies;
+ int ret;
+ int i;
+ u8 id;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->max14577 = max14577;
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, max14577_muic_irq_work);
+
+ switch (max14577->dev_type) {
+ case MAXIM_DEVICE_TYPE_MAX77836:
+ info->muic_irqs = max77836_muic_irqs;
+ info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
+ break;
+ case MAXIM_DEVICE_TYPE_MAX14577:
+ default:
+ info->muic_irqs = max14577_muic_irqs;
+ info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
+ }
+
+ /* Support irq domain for max14577 MUIC device */
+ for (i = 0; i < info->muic_irqs_num; i++) {
+ struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
+ int virq = 0;
+
+ virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+ max14577_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Initialize extcon device */
+ info->edev = devm_extcon_dev_allocate(&pdev->dev,
+ max14577_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /* Default h/w line path */
+ info->path_usb = CTRL1_SW_USB;
+ info->path_uart = CTRL1_SW_UART;
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+
+ /* Set initial path for UART */
+ max14577_muic_set_path(info, info->path_uart, true);
+
+ /* Check revision number of MUIC device*/
+ ret = max14577_read_reg(info->max14577->regmap,
+ MAX14577_REG_DEVICEID, &id);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to read revision number\n");
+ return ret;
+ }
+ dev_info(info->dev, "device ID : 0x%x\n", id);
+
+ /* Set ADC debounce time */
+ max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ delay_jiffies);
+
+ return ret;
+}
+
+static int max14577_muic_remove(struct platform_device *pdev)
+{
+ struct max14577_muic_info *info = platform_get_drvdata(pdev);
+
+ cancel_work_sync(&info->irq_work);
+
+ return 0;
+}
+
+static const struct platform_device_id max14577_muic_id[] = {
+ { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
+ { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, max14577_muic_id);
+
+static struct platform_driver max14577_muic_driver = {
+ .driver = {
+ .name = "max14577-muic",
+ },
+ .probe = max14577_muic_probe,
+ .remove = max14577_muic_remove,
+ .id_table = max14577_muic_id,
+};
+
+module_platform_driver(max14577_muic_driver);
+
+MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max14577");
diff --git a/drivers/extcon/extcon-max3355.c b/drivers/extcon/extcon-max3355.c
new file mode 100644
index 0000000..1335a47
--- /dev/null
+++ b/drivers/extcon/extcon-max3355.c
@@ -0,0 +1,147 @@
+/*
+ * Maxim Integrated MAX3355 USB OTG chip extcon driver
+ *
+ * Copyright (C) 2014-2015 Cogent Embedded, Inc.
+ * Author: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+
+struct max3355_data {
+ struct extcon_dev *edev;
+ struct gpio_desc *id_gpiod;
+ struct gpio_desc *shdn_gpiod;
+};
+
+static const unsigned int max3355_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static irqreturn_t max3355_id_irq(int irq, void *dev_id)
+{
+ struct max3355_data *data = dev_id;
+ int id = gpiod_get_value_cansleep(data->id_gpiod);
+
+ if (id) {
+ /*
+ * ID = 1 means USB HOST cable detached.
+ * As we don't have event for USB peripheral cable attached,
+ * we simulate USB peripheral attach here.
+ */
+ extcon_set_state_sync(data->edev, EXTCON_USB_HOST, false);
+ extcon_set_state_sync(data->edev, EXTCON_USB, true);
+ } else {
+ /*
+ * ID = 0 means USB HOST cable attached.
+ * As we don't have event for USB peripheral cable detached,
+ * we simulate USB peripheral detach here.
+ */
+ extcon_set_state_sync(data->edev, EXTCON_USB, false);
+ extcon_set_state_sync(data->edev, EXTCON_USB_HOST, true);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int max3355_probe(struct platform_device *pdev)
+{
+ struct max3355_data *data;
+ struct gpio_desc *gpiod;
+ int irq, err;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct max3355_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ gpiod = devm_gpiod_get(&pdev->dev, "id", GPIOD_IN);
+ if (IS_ERR(gpiod)) {
+ dev_err(&pdev->dev, "failed to get ID_OUT GPIO\n");
+ return PTR_ERR(gpiod);
+ }
+ data->id_gpiod = gpiod;
+
+ gpiod = devm_gpiod_get(&pdev->dev, "maxim,shdn", GPIOD_OUT_HIGH);
+ if (IS_ERR(gpiod)) {
+ dev_err(&pdev->dev, "failed to get SHDN# GPIO\n");
+ return PTR_ERR(gpiod);
+ }
+ data->shdn_gpiod = gpiod;
+
+ data->edev = devm_extcon_dev_allocate(&pdev->dev, max3355_cable);
+ if (IS_ERR(data->edev)) {
+ dev_err(&pdev->dev, "failed to allocate extcon device\n");
+ return PTR_ERR(data->edev);
+ }
+
+ err = devm_extcon_dev_register(&pdev->dev, data->edev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ return err;
+ }
+
+ irq = gpiod_to_irq(data->id_gpiod);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to translate ID_OUT GPIO to IRQ\n");
+ return irq;
+ }
+
+ err = devm_request_threaded_irq(&pdev->dev, irq, NULL, max3355_id_irq,
+ IRQF_ONESHOT | IRQF_NO_SUSPEND |
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING,
+ pdev->name, data);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to request ID_OUT IRQ\n");
+ return err;
+ }
+
+ platform_set_drvdata(pdev, data);
+
+ /* Perform initial detection */
+ max3355_id_irq(irq, data);
+
+ return 0;
+}
+
+static int max3355_remove(struct platform_device *pdev)
+{
+ struct max3355_data *data = platform_get_drvdata(pdev);
+
+ gpiod_set_value_cansleep(data->shdn_gpiod, 0);
+
+ return 0;
+}
+
+static const struct of_device_id max3355_match_table[] = {
+ { .compatible = "maxim,max3355", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max3355_match_table);
+
+static struct platform_driver max3355_driver = {
+ .probe = max3355_probe,
+ .remove = max3355_remove,
+ .driver = {
+ .name = "extcon-max3355",
+ .of_match_table = max3355_match_table,
+ },
+};
+
+module_platform_driver(max3355_driver);
+
+MODULE_AUTHOR("Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>");
+MODULE_DESCRIPTION("Maxim MAX3355 extcon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
new file mode 100644
index 0000000..227651f
--- /dev/null
+++ b/drivers/extcon/extcon-max77693.c
@@ -0,0 +1,1278 @@
+/*
+ * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
+ *
+ * Copyright (C) 2012 Samsung Electrnoics
+ * Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/extcon-provider.h>
+#include <linux/regmap.h>
+#include <linux/irqdomain.h>
+
+#define DEV_NAME "max77693-muic"
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
+
+/*
+ * Default value of MAX77693 register to bring up MUIC device.
+ * If user don't set some initial value for MUIC device through platform data,
+ * extcon-max77693 driver use 'default_init_data' to bring up base operation
+ * of MAX77693 MUIC device.
+ */
+static struct max77693_reg_data default_init_data[] = {
+ {
+ /* STATUS2 - [3]ChgDetRun */
+ .addr = MAX77693_MUIC_REG_STATUS2,
+ .data = MAX77693_STATUS2_CHGDETRUN_MASK,
+ }, {
+ /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
+ .addr = MAX77693_MUIC_REG_INTMASK1,
+ .data = INTMASK1_ADC1K_MASK
+ | INTMASK1_ADC_MASK,
+ }, {
+ /* INTMASK2 - Unmask [0]ChgTypM */
+ .addr = MAX77693_MUIC_REG_INTMASK2,
+ .data = INTMASK2_CHGTYP_MASK,
+ }, {
+ /* INTMASK3 - Mask all of interrupts */
+ .addr = MAX77693_MUIC_REG_INTMASK3,
+ .data = 0x0,
+ }, {
+ /* CDETCTRL2 */
+ .addr = MAX77693_MUIC_REG_CDETCTRL2,
+ .data = CDETCTRL2_VIDRMEN_MASK
+ | CDETCTRL2_DXOVPEN_MASK,
+ },
+};
+
+enum max77693_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_5MS = 0,
+ ADC_DEBOUNCE_TIME_10MS,
+ ADC_DEBOUNCE_TIME_25MS,
+ ADC_DEBOUNCE_TIME_38_62MS,
+};
+
+struct max77693_muic_info {
+ struct device *dev;
+ struct max77693_dev *max77693;
+ struct extcon_dev *edev;
+ int prev_cable_type;
+ int prev_cable_type_gnd;
+ int prev_chg_type;
+ int prev_button_type;
+ u8 status[2];
+
+ int irq;
+ struct work_struct irq_work;
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+
+ /* Button of dock device */
+ struct input_dev *dock;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
+
+enum max77693_muic_cable_group {
+ MAX77693_CABLE_GROUP_ADC = 0,
+ MAX77693_CABLE_GROUP_ADC_GND,
+ MAX77693_CABLE_GROUP_CHG,
+ MAX77693_CABLE_GROUP_VBVOLT,
+};
+
+enum max77693_muic_charger_type {
+ MAX77693_CHARGER_TYPE_NONE = 0,
+ MAX77693_CHARGER_TYPE_USB,
+ MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX77693_CHARGER_TYPE_DEDICATED_CHG,
+ MAX77693_CHARGER_TYPE_APPLE_500MA,
+ MAX77693_CHARGER_TYPE_APPLE_1A_2A,
+ MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
+};
+
+/**
+ * struct max77693_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max77693_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max77693_muic_irq muic_irqs[] = {
+ { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
+ { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
+ { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
+ { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
+ { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
+ { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
+ { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
+ { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
+ { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
+ { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
+ { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
+ { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
+ { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
+ { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
+};
+
+/* Define supported accessory type */
+enum max77693_muic_acc_type {
+ MAX77693_MUIC_ADC_GROUND = 0x0,
+ MAX77693_MUIC_ADC_SEND_END_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX77693_MUIC_ADC_RESERVED_ACC_1,
+ MAX77693_MUIC_ADC_RESERVED_ACC_2,
+ MAX77693_MUIC_ADC_RESERVED_ACC_3,
+ MAX77693_MUIC_ADC_RESERVED_ACC_4,
+ MAX77693_MUIC_ADC_RESERVED_ACC_5,
+ MAX77693_MUIC_ADC_CEA936_AUDIO,
+ MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX77693_MUIC_ADC_TTY_CONVERTER,
+ MAX77693_MUIC_ADC_UART_CABLE,
+ MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
+ MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
+ MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
+ MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX77693_MUIC_ADC_OPEN,
+
+ /*
+ * The below accessories have same ADC value so ADCLow and
+ * ADC1K bit is used to separate specific accessory.
+ */
+ /* ADC|VBVolot|ADCLow|ADC1K| */
+ MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
+ MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
+ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
+ MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
+ MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
+};
+
+/*
+ * MAX77693 MUIC device support below list of accessories(external connector)
+ */
+static const unsigned int max77693_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_FAST,
+ EXTCON_CHG_USB_SLOW,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_DISP_MHL,
+ EXTCON_JIG,
+ EXTCON_DOCK,
+ EXTCON_NONE,
+};
+
+/*
+ * max77693_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max77693 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
+ enum max77693_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ /*
+ * Don't touch BTLDset, JIGset when you want to change adc
+ * debounce time. If it writes other than 0 to BTLDset, JIGset
+ * muic device will be reset and loose current state.
+ */
+ ret = regmap_write(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL3,
+ time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
+ * max77693_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max77693 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max77693 MUIC device share outside H/W line among a varity of cables
+ * so, this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max77693_muic_set_path(struct max77693_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret;
+ unsigned int ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = MAX77693_CONTROL1_SW_OPEN;
+
+ ret = regmap_update_bits(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ if (attached)
+ ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = regmap_update_bits(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL2,
+ MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
+ ctrl2);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+/*
+ * max77693_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max77693 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - MAX77693_CABLE_GROUP_ADC
+ * - MAX77693_CABLE_GROUP_ADC_GND
+ * - MAX77693_CABLE_GROUP_CHG
+ * - MAX77693_CABLE_GROUP_VBVOLT
+ */
+static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
+ enum max77693_muic_cable_group group, bool *attached)
+{
+ int cable_type = 0;
+ int adc;
+ int adc1k;
+ int adclow;
+ int vbvolt;
+ int chg_type;
+
+ switch (group) {
+ case MAX77693_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
+ adc >>= MAX77693_STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX77693_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX77693_CABLE_GROUP_ADC_GND:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
+ adc >>= MAX77693_STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type/_gnd) for handling cable when cable
+ * is detached.
+ */
+ if (adc == MAX77693_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type_gnd;
+ info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
+ adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
+ adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
+ adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
+
+ vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
+ vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
+
+ /**
+ * [0x1|VBVolt|ADCLow|ADC1K]
+ * [0x1| 0| 0| 0] USB_HOST
+ * [0x1| 1| 0| 0] USB_HSOT_VB
+ * [0x1| 0| 1| 0] Audio Video cable with load
+ * [0x1| 0| 1| 1] MHL without charging cable
+ * [0x1| 1| 1| 1] MHL with charging cable
+ */
+ cable_type = ((0x1 << 8)
+ | (vbvolt << 2)
+ | (adclow << 1)
+ | adc1k);
+
+ info->prev_cable_type = adc;
+ info->prev_cable_type_gnd = cable_type;
+ }
+
+ break;
+ case MAX77693_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
+ chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ case MAX77693_CABLE_GROUP_VBVOLT:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
+ adc >>= MAX77693_STATUS1_ADC_SHIFT;
+ chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
+ chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
+
+ if (adc == MAX77693_MUIC_ADC_OPEN
+ && chg_type == MAX77693_CHARGER_TYPE_NONE)
+ *attached = false;
+ else
+ *attached = true;
+
+ /*
+ * Read vbvolt field, if vbvolt is 1,
+ * this cable is used for charging.
+ */
+ vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
+ vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
+
+ cable_type = vbvolt;
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
+static int max77693_muic_dock_handler(struct max77693_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret = 0;
+ int vbvolt;
+ bool cable_attached;
+ unsigned int dock_id;
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ /*
+ * Check power cable whether attached or detached state.
+ * The Dock-Smart device need surely external power supply.
+ * If power cable(USB/TA) isn't connected to Dock device,
+ * user can't use Dock-Smart for desktop mode.
+ */
+ vbvolt = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
+ if (attached && !vbvolt) {
+ dev_warn(info->dev,
+ "Cannot detect external power supply\n");
+ return 0;
+ }
+
+ /*
+ * Notify Dock/MHL state.
+ * - Dock device include three type of cable which
+ * are HDMI, USB for mouse/keyboard and micro-usb port
+ * for USB/TA cable. Dock device need always exteranl
+ * power supply(USB/TA cable through micro-usb cable). Dock
+ * device support screen output of target to separate
+ * monitor and mouse/keyboard for desktop mode.
+ *
+ * Features of 'USB/TA cable with Dock device'
+ * - Support MHL
+ * - Support external output feature of audio
+ * - Support charging through micro-usb port without data
+ * connection if TA cable is connected to target.
+ * - Support charging and data connection through micro-usb port
+ * if USB cable is connected between target and host
+ * device.
+ * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
+ */
+ ret = max77693_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
+ goto out;
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
+ dock_id = EXTCON_DOCK;
+ break;
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ dock_id = EXTCON_DOCK;
+ if (!attached) {
+ extcon_set_state_sync(info->edev, EXTCON_USB, false);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ false);
+ }
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s dock device\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ /* Dock-Car/Desk/Audio, PATH:AUDIO */
+ ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
+ attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_state_sync(info->edev, dock_id, attached);
+
+out:
+ return 0;
+}
+
+static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
+ int button_type, bool attached)
+{
+ struct input_dev *dock = info->dock;
+ unsigned int code;
+
+ switch (button_type) {
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
+ /* DOCK_KEY_PREV */
+ code = KEY_PREVIOUSSONG;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
+ /* DOCK_KEY_NEXT */
+ code = KEY_NEXTSONG;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
+ /* DOCK_VOL_DOWN */
+ code = KEY_VOLUMEDOWN;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
+ /* DOCK_VOL_UP */
+ code = KEY_VOLUMEUP;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
+ /* DOCK_KEY_PLAY_PAUSE */
+ code = KEY_PLAYPAUSE;
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s key (adc:0x%x)\n",
+ attached ? "pressed" : "released", button_type);
+ return -EINVAL;
+ }
+
+ input_event(dock, EV_KEY, code, attached);
+ input_sync(dock);
+
+ return 0;
+}
+
+static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
+{
+ int cable_type_gnd;
+ int ret = 0;
+ bool attached;
+
+ cable_type_gnd = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC_GND, &attached);
+
+ switch (cable_type_gnd) {
+ case MAX77693_MUIC_GND_USB_HOST:
+ case MAX77693_MUIC_GND_USB_HOST_VB:
+ /* USB_HOST, PATH: AP_USB */
+ ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
+ attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
+ break;
+ case MAX77693_MUIC_GND_AV_CABLE_LOAD:
+ /* Audio Video Cable with load, PATH:AUDIO */
+ ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
+ attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_state_sync(info->edev, EXTCON_USB, attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+ break;
+ case MAX77693_MUIC_GND_MHL:
+ case MAX77693_MUIC_GND_MHL_VB:
+ /* MHL or MHL with USB/TA cable */
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s cable of gnd type\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77693_muic_jig_handler(struct max77693_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret = 0;
+ u8 path = MAX77693_CONTROL1_SW_OPEN;
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
+ /* PATH:AP_USB */
+ path = MAX77693_CONTROL1_SW_USB;
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
+ /* PATH:AP_UART */
+ path = MAX77693_CONTROL1_SW_UART;
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s jig cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ ret = max77693_muic_set_path(info, path, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
+
+ return 0;
+}
+
+static int max77693_muic_adc_handler(struct max77693_muic_info *info)
+{
+ int cable_type;
+ int button_type;
+ bool attached;
+ int ret = 0;
+
+ /* Check accessory state which is either detached or attached */
+ cable_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC, &attached);
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type,
+ info->prev_cable_type);
+
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_GROUND:
+ /* USB_HOST/MHL/Audio */
+ max77693_muic_adc_ground_handler(info);
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
+ /* JIG */
+ ret = max77693_muic_jig_handler(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ /*
+ * DOCK device
+ *
+ * The MAX77693 MUIC device can detect total 34 cable type
+ * except of charger cable and MUIC device didn't define
+ * specfic role of cable in the range of from 0x01 to 0x12
+ * of ADC value. So, can use/define cable with no role according
+ * to schema of hardware board.
+ */
+ ret = max77693_muic_dock_handler(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
+ /*
+ * Button of DOCK device
+ * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
+ *
+ * The MAX77693 MUIC device can detect total 34 cable type
+ * except of charger cable and MUIC device didn't define
+ * specfic role of cable in the range of from 0x01 to 0x12
+ * of ADC value. So, can use/define cable with no role according
+ * to schema of hardware board.
+ */
+ if (attached)
+ button_type = info->prev_button_type = cable_type;
+ else
+ button_type = info->prev_button_type;
+
+ ret = max77693_muic_dock_button_handler(info, button_type,
+ attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77693_MUIC_ADC_SEND_END_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_1:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_2:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_4:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_5:
+ case MAX77693_MUIC_ADC_CEA936_AUDIO:
+ case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX77693_MUIC_ADC_TTY_CONVERTER:
+ case MAX77693_MUIC_ADC_UART_CABLE:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
+ /*
+ * This accessory isn't used in general case if it is specially
+ * needed to detect additional accessory, should implement
+ * proper operation when this accessory is attached/detached.
+ */
+ dev_info(info->dev,
+ "accessory is %s but it isn't used (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77693_muic_chg_handler(struct max77693_muic_info *info)
+{
+ int chg_type;
+ int cable_type_gnd;
+ int cable_type;
+ bool attached;
+ bool cable_attached;
+ int ret = 0;
+
+ chg_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_CHG, &attached);
+
+ dev_info(info->dev,
+ "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+ attached ? "attached" : "detached",
+ chg_type, info->prev_chg_type);
+
+ switch (chg_type) {
+ case MAX77693_CHARGER_TYPE_USB:
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ case MAX77693_CHARGER_TYPE_NONE:
+ /* Check MAX77693_CABLE_GROUP_ADC_GND type */
+ cable_type_gnd = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC_GND,
+ &cable_attached);
+ switch (cable_type_gnd) {
+ case MAX77693_MUIC_GND_MHL:
+ case MAX77693_MUIC_GND_MHL_VB:
+ /*
+ * MHL cable with USB/TA cable
+ * - MHL cable include two port(HDMI line and separate
+ * micro-usb port. When the target connect MHL cable,
+ * extcon driver check whether USB/TA cable is
+ * connected. If USB/TA cable is connected, extcon
+ * driver notify state to notifiee for charging battery.
+ *
+ * Features of 'USB/TA with MHL cable'
+ * - Support MHL
+ * - Support charging through micro-usb port without
+ * data connection
+ */
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ attached);
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
+ cable_attached);
+ break;
+ }
+
+ /* Check MAX77693_CABLE_GROUP_ADC type */
+ cable_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC,
+ &cable_attached);
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ /*
+ * Dock-Audio device with USB/TA cable
+ * - Dock device include two port(Dock-Audio and micro-
+ * usb port). When the target connect Dock-Audio device,
+ * extcon driver check whether USB/TA cable is connected
+ * or not. If USB/TA cable is connected, extcon driver
+ * notify state to notifiee for charging battery.
+ *
+ * Features of 'USB/TA cable with Dock-Audio device'
+ * - Support external output feature of audio.
+ * - Support charging through micro-usb port without
+ * data connection.
+ */
+ extcon_set_state_sync(info->edev, EXTCON_USB,
+ attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+
+ if (!cable_attached)
+ extcon_set_state_sync(info->edev, EXTCON_DOCK,
+ cable_attached);
+ break;
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ /*
+ * Dock-Smart device with USB/TA cable
+ * - Dock-Desk device include three type of cable which
+ * are HDMI, USB for mouse/keyboard and micro-usb port
+ * for USB/TA cable. Dock-Smart device need always
+ * exteranl power supply(USB/TA cable through micro-usb
+ * cable). Dock-Smart device support screen output of
+ * target to separate monitor and mouse/keyboard for
+ * desktop mode.
+ *
+ * Features of 'USB/TA cable with Dock-Smart device'
+ * - Support MHL
+ * - Support external output feature of audio
+ * - Support charging through micro-usb port without
+ * data connection if TA cable is connected to target.
+ * - Support charging and data connection through micro-
+ * usb port if USB cable is connected between target
+ * and host device
+ * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
+ */
+ ret = max77693_muic_set_path(info, info->path_usb,
+ attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_DOCK,
+ attached);
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
+ attached);
+ break;
+ }
+
+ /* Check MAX77693_CABLE_GROUP_CHG type */
+ switch (chg_type) {
+ case MAX77693_CHARGER_TYPE_NONE:
+ /*
+ * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
+ * cable is attached, muic device happen below two irq.
+ * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
+ * MHL/Dock-Audio.
+ * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
+ * USB/TA cable connected to MHL or Dock-Audio.
+ * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
+ * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
+ *
+ * If user attach MHL (with USB/TA cable and immediately
+ * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
+ * _INT2_CHGTYP irq is happened, USB/TA cable remain
+ * connected state to target. But USB/TA cable isn't
+ * connected to target. The user be face with unusual
+ * action. So, driver should check this situation in
+ * spite of, that previous charger type is N/A.
+ */
+ break;
+ case MAX77693_CHARGER_TYPE_USB:
+ /* Only USB cable, PATH:AP_USB */
+ ret = max77693_muic_set_path(info, info->path_usb,
+ attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB,
+ attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ /* Only TA cable */
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ attached);
+ break;
+ }
+ break;
+ case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
+ attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_500MA:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
+ attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
+ attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (chg_type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void max77693_muic_irq_work(struct work_struct *work)
+{
+ struct max77693_muic_info *info = container_of(work,
+ struct max77693_muic_info, irq_work);
+ int irq_type = -1;
+ int i, ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
+ ret = regmap_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, info->status, 2);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ switch (irq_type) {
+ case MAX77693_MUIC_IRQ_INT1_ADC:
+ case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
+ case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
+ case MAX77693_MUIC_IRQ_INT1_ADC1K:
+ /*
+ * Handle all of accessory except for
+ * type of charger accessory.
+ */
+ ret = max77693_muic_adc_handler(info);
+ break;
+ case MAX77693_MUIC_IRQ_INT2_CHGTYP:
+ case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
+ case MAX77693_MUIC_IRQ_INT2_DCDTMR:
+ case MAX77693_MUIC_IRQ_INT2_DXOVP:
+ case MAX77693_MUIC_IRQ_INT2_VBVOLT:
+ case MAX77693_MUIC_IRQ_INT2_VIDRM:
+ /* Handle charger accessory */
+ ret = max77693_muic_chg_handler(info);
+ break;
+ case MAX77693_MUIC_IRQ_INT3_EOC:
+ case MAX77693_MUIC_IRQ_INT3_CGMBC:
+ case MAX77693_MUIC_IRQ_INT3_OVP:
+ case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
+ case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
+ case MAX77693_MUIC_IRQ_INT3_BAT_DET:
+ break;
+ default:
+ dev_err(info->dev, "muic interrupt: irq %d occurred\n",
+ irq_type);
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
+{
+ struct max77693_muic_info *info = data;
+
+ info->irq = irq;
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static const struct regmap_config max77693_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
+{
+ int ret = 0;
+ int adc;
+ int chg_type;
+ bool attached;
+
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = regmap_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, info->status, 2);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+
+ adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
+ ret = max77693_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
+ ret = max77693_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
+
+static void max77693_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max77693_muic_info *info = container_of(to_delayed_work(work),
+ struct max77693_muic_info, wq_detcable);
+
+ max77693_muic_detect_accessory(info);
+}
+
+static int max77693_muic_probe(struct platform_device *pdev)
+{
+ struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
+ struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
+ struct max77693_muic_info *info;
+ struct max77693_reg_data *init_data;
+ int num_init_data;
+ int delay_jiffies;
+ int ret;
+ int i;
+ unsigned int id;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->max77693 = max77693;
+ if (info->max77693->regmap_muic) {
+ dev_dbg(&pdev->dev, "allocate register map\n");
+ } else {
+ info->max77693->regmap_muic = devm_regmap_init_i2c(
+ info->max77693->i2c_muic,
+ &max77693_muic_regmap_config);
+ if (IS_ERR(info->max77693->regmap_muic)) {
+ ret = PTR_ERR(info->max77693->regmap_muic);
+ dev_err(max77693->dev,
+ "failed to allocate register map: %d\n", ret);
+ return ret;
+ }
+ }
+
+ /* Register input device for button of dock device */
+ info->dock = devm_input_allocate_device(&pdev->dev);
+ if (!info->dock) {
+ dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
+ return -ENOMEM;
+ }
+ info->dock->name = "max77693-muic/dock";
+ info->dock->phys = "max77693-muic/extcon";
+ info->dock->dev.parent = &pdev->dev;
+
+ __set_bit(EV_REP, info->dock->evbit);
+
+ input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
+ input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
+ input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
+ input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
+ input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
+
+ ret = input_register_device(info->dock);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
+ ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, max77693_muic_irq_work);
+
+ /* Support irq domain for MAX77693 MUIC device */
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+ struct max77693_muic_irq *muic_irq = &muic_irqs[i];
+ int virq;
+
+ virq = regmap_irq_get_virq(max77693->irq_data_muic,
+ muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+ max77693_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Initialize extcon device */
+ info->edev = devm_extcon_dev_allocate(&pdev->dev,
+ max77693_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /* Initialize MUIC register by using platform data or default data */
+ if (pdata && pdata->muic_data) {
+ init_data = pdata->muic_data->init_data;
+ num_init_data = pdata->muic_data->num_init_data;
+ } else {
+ init_data = default_init_data;
+ num_init_data = ARRAY_SIZE(default_init_data);
+ }
+
+ for (i = 0; i < num_init_data; i++) {
+ regmap_write(info->max77693->regmap_muic,
+ init_data[i].addr,
+ init_data[i].data);
+ }
+
+ if (pdata && pdata->muic_data) {
+ struct max77693_muic_platform_data *muic_pdata
+ = pdata->muic_data;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ if (muic_pdata->path_uart)
+ info->path_uart = muic_pdata->path_uart;
+ else
+ info->path_uart = MAX77693_CONTROL1_SW_UART;
+
+ if (muic_pdata->path_usb)
+ info->path_usb = muic_pdata->path_usb;
+ else
+ info->path_usb = MAX77693_CONTROL1_SW_USB;
+
+ /*
+ * Default delay time for detecting cable state
+ * after certain time.
+ */
+ if (muic_pdata->detcable_delay_ms)
+ delay_jiffies =
+ msecs_to_jiffies(muic_pdata->detcable_delay_ms);
+ else
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ } else {
+ info->path_usb = MAX77693_CONTROL1_SW_USB;
+ info->path_uart = MAX77693_CONTROL1_SW_UART;
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ }
+
+ /* Set initial path for UART */
+ max77693_muic_set_path(info, info->path_uart, true);
+
+ /* Check revision number of MUIC device*/
+ ret = regmap_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_ID, &id);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to read revision number\n");
+ return ret;
+ }
+ dev_info(info->dev, "device ID : 0x%x\n", id);
+
+ /* Set ADC debounce time */
+ max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ delay_jiffies);
+
+ return ret;
+}
+
+static int max77693_muic_remove(struct platform_device *pdev)
+{
+ struct max77693_muic_info *info = platform_get_drvdata(pdev);
+
+ cancel_work_sync(&info->irq_work);
+ input_unregister_device(info->dock);
+
+ return 0;
+}
+
+static struct platform_driver max77693_muic_driver = {
+ .driver = {
+ .name = DEV_NAME,
+ },
+ .probe = max77693_muic_probe,
+ .remove = max77693_muic_remove,
+};
+
+module_platform_driver(max77693_muic_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max77693");
diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c
new file mode 100644
index 0000000..c9fcd6c
--- /dev/null
+++ b/drivers/extcon/extcon-max77843.c
@@ -0,0 +1,960 @@
+/*
+ * extcon-max77843.c - Maxim MAX77843 extcon driver to support
+ * MUIC(Micro USB Interface Controller)
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Jaewon Kim <jaewon02.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77843-private.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+
+#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */
+
+enum max77843_muic_status {
+ MAX77843_MUIC_STATUS1 = 0,
+ MAX77843_MUIC_STATUS2,
+ MAX77843_MUIC_STATUS3,
+
+ MAX77843_MUIC_STATUS_NUM,
+};
+
+struct max77843_muic_info {
+ struct device *dev;
+ struct max77693_dev *max77843;
+ struct extcon_dev *edev;
+
+ struct mutex mutex;
+ struct work_struct irq_work;
+ struct delayed_work wq_detcable;
+
+ u8 status[MAX77843_MUIC_STATUS_NUM];
+ int prev_cable_type;
+ int prev_chg_type;
+ int prev_gnd_type;
+
+ bool irq_adc;
+ bool irq_chg;
+};
+
+enum max77843_muic_cable_group {
+ MAX77843_CABLE_GROUP_ADC = 0,
+ MAX77843_CABLE_GROUP_ADC_GND,
+ MAX77843_CABLE_GROUP_CHG,
+};
+
+enum max77843_muic_adc_debounce_time {
+ MAX77843_DEBOUNCE_TIME_5MS = 0,
+ MAX77843_DEBOUNCE_TIME_10MS,
+ MAX77843_DEBOUNCE_TIME_25MS,
+ MAX77843_DEBOUNCE_TIME_38_62MS,
+};
+
+/* Define accessory cable type */
+enum max77843_muic_accessory_type {
+ MAX77843_MUIC_ADC_GROUND = 0,
+ MAX77843_MUIC_ADC_SEND_END_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX77843_MUIC_ADC_RESERVED_ACC_1,
+ MAX77843_MUIC_ADC_RESERVED_ACC_2,
+ MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */
+ MAX77843_MUIC_ADC_RESERVED_ACC_4,
+ MAX77843_MUIC_ADC_RESERVED_ACC_5,
+ MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
+ MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX77843_MUIC_ADC_TTY_CONVERTER,
+ MAX77843_MUIC_ADC_UART_CABLE,
+ MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
+ MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
+ MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
+ MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
+ MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
+ MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
+ MAX77843_MUIC_ADC_OPEN,
+
+ /*
+ * The below accessories should check
+ * not only ADC value but also ADC1K and VBVolt value.
+ */
+ /* Offset|ADC1K|VBVolt| */
+ MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
+ MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
+ MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
+ MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
+};
+
+/* Define charger cable type */
+enum max77843_muic_charger_type {
+ MAX77843_MUIC_CHG_NONE = 0,
+ MAX77843_MUIC_CHG_USB,
+ MAX77843_MUIC_CHG_DOWNSTREAM,
+ MAX77843_MUIC_CHG_DEDICATED,
+ MAX77843_MUIC_CHG_SPECIAL_500MA,
+ MAX77843_MUIC_CHG_SPECIAL_1A,
+ MAX77843_MUIC_CHG_SPECIAL_BIAS,
+ MAX77843_MUIC_CHG_RESERVED,
+ MAX77843_MUIC_CHG_GND,
+ MAX77843_MUIC_CHG_DOCK,
+};
+
+static const unsigned int max77843_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_CHG_USB_FAST,
+ EXTCON_CHG_USB_SLOW,
+ EXTCON_DISP_MHL,
+ EXTCON_DOCK,
+ EXTCON_JIG,
+ EXTCON_NONE,
+};
+
+struct max77843_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max77843_muic_irq max77843_muic_irqs[] = {
+ { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
+ { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
+ { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
+ { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
+ { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
+ { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
+ { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
+ { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
+ { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
+ { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
+ { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
+ { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
+ { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
+ { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
+ { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
+ { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
+};
+
+static const struct regmap_config max77843_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77843_MUIC_REG_END,
+};
+
+static const struct regmap_irq max77843_muic_irq[] = {
+ /* INT1 interrupt */
+ { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
+ { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
+ { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
+
+ /* INT2 interrupt */
+ { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
+ { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
+ { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
+ { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
+ { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
+
+ /* INT3 interrupt */
+ { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
+ { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
+};
+
+static const struct regmap_irq_chip max77843_muic_irq_chip = {
+ .name = "max77843-muic",
+ .status_base = MAX77843_MUIC_REG_INT1,
+ .mask_base = MAX77843_MUIC_REG_INTMASK1,
+ .mask_invert = true,
+ .num_regs = 3,
+ .irqs = max77843_muic_irq,
+ .num_irqs = ARRAY_SIZE(max77843_muic_irq),
+};
+
+static int max77843_muic_set_path(struct max77843_muic_info *info,
+ u8 val, bool attached, bool nobccomp)
+{
+ struct max77693_dev *max77843 = info->max77843;
+ int ret = 0;
+ unsigned int ctrl1, ctrl2;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
+ if (nobccomp) {
+ /* Disable BC1.2 protocol and force manual switch control */
+ ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
+ }
+
+ ret = regmap_update_bits(max77843->regmap_muic,
+ MAX77843_MUIC_REG_CONTROL1,
+ MAX77843_MUIC_CONTROL1_COM_SW |
+ MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
+ ctrl1);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot switch MUIC port\n");
+ return ret;
+ }
+
+ if (attached)
+ ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
+ else
+ ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
+
+ ret = regmap_update_bits(max77843->regmap_muic,
+ MAX77843_MUIC_REG_CONTROL2,
+ MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
+ MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot update lowpower mode\n");
+ return ret;
+ }
+
+ dev_dbg(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
+ bool on)
+{
+ struct max77693_dev *max77843 = info->max77843;
+ unsigned int cnfg00;
+
+ if (on)
+ cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
+ else
+ cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
+
+ regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
+ MAX77843_CHG_MODE_MASK, cnfg00);
+}
+
+static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
+ enum max77843_muic_cable_group group, bool *attached)
+{
+ int adc, chg_type, cable_type, gnd_type;
+
+ adc = info->status[MAX77843_MUIC_STATUS1] &
+ MAX77843_MUIC_STATUS1_ADC_MASK;
+ adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
+
+ switch (group) {
+ case MAX77843_CABLE_GROUP_ADC:
+ if (adc == MAX77843_MUIC_ADC_OPEN) {
+ *attached = false;
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX77843_CABLE_GROUP_CHG:
+ chg_type = info->status[MAX77843_MUIC_STATUS2] &
+ MAX77843_MUIC_STATUS2_CHGTYP_MASK;
+
+ /* Check GROUND accessory with charger cable */
+ if (adc == MAX77843_MUIC_ADC_GROUND) {
+ if (chg_type == MAX77843_MUIC_CHG_NONE) {
+ /*
+ * The following state when charger cable is
+ * disconnected but the GROUND accessory still
+ * connected.
+ */
+ *attached = false;
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
+ } else {
+
+ /*
+ * The following state when charger cable is
+ * connected on the GROUND accessory.
+ */
+ *attached = true;
+ cable_type = MAX77843_MUIC_CHG_GND;
+ info->prev_chg_type = MAX77843_MUIC_CHG_GND;
+ }
+ break;
+ }
+
+ if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
+ if (chg_type == MAX77843_MUIC_CHG_NONE) {
+ *attached = false;
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
+ } else {
+ *attached = true;
+ cable_type = MAX77843_MUIC_CHG_DOCK;
+ info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
+ }
+ break;
+ }
+
+ if (chg_type == MAX77843_MUIC_CHG_NONE) {
+ *attached = false;
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
+ } else {
+ *attached = true;
+ cable_type = info->prev_chg_type = chg_type;
+ }
+ break;
+ case MAX77843_CABLE_GROUP_ADC_GND:
+ if (adc == MAX77843_MUIC_ADC_OPEN) {
+ *attached = false;
+ cable_type = info->prev_gnd_type;
+ info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ /*
+ * Offset|ADC1K|VBVolt|
+ * 0x1| 0| 0| USB-HOST
+ * 0x1| 0| 1| USB-HOST with VB
+ * 0x1| 1| 0| MHL
+ * 0x1| 1| 1| MHL with VB
+ */
+ /* Get ADC1K register bit */
+ gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
+ MAX77843_MUIC_STATUS1_ADC1K_MASK);
+
+ /* Get VBVolt register bit */
+ gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
+ MAX77843_MUIC_STATUS2_VBVOLT_MASK);
+ gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
+
+ /* Offset of GND cable */
+ gnd_type |= MAX77843_MUIC_GND_USB_HOST;
+ cable_type = info->prev_gnd_type = gnd_type;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
+static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
+{
+ int ret, gnd_cable_type;
+ bool attached;
+
+ gnd_cable_type = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_ADC_GND, &attached);
+ dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
+ attached ? "attached" : "detached", gnd_cable_type);
+
+ switch (gnd_cable_type) {
+ case MAX77843_MUIC_GND_USB_HOST:
+ case MAX77843_MUIC_GND_USB_HOST_VB:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_USB,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
+ max77843_charger_set_otg_vbus(info, attached);
+ break;
+ case MAX77843_MUIC_GND_MHL_VB:
+ case MAX77843_MUIC_GND_MHL:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
+ attached ? "attached" : "detached", gnd_cable_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77843_muic_jig_handler(struct max77843_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret;
+ u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
+
+ dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
+ path = MAX77843_MUIC_CONTROL1_SW_USB;
+ break;
+ case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ path = MAX77843_MUIC_CONTROL1_SW_UART;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = max77843_muic_set_path(info, path, attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
+
+ return 0;
+}
+
+static int max77843_muic_dock_handler(struct max77843_muic_info *info,
+ bool attached)
+{
+ int ret;
+
+ dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
+ attached ? "attached" : "detached");
+
+ ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
+ attached, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
+ extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
+
+ return 0;
+}
+
+static int max77843_muic_adc_handler(struct max77843_muic_info *info)
+{
+ int ret, cable_type;
+ bool attached;
+
+ cable_type = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_ADC, &attached);
+
+ dev_dbg(info->dev,
+ "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type,
+ info->prev_cable_type);
+
+ switch (cable_type) {
+ case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
+ ret = max77843_muic_dock_handler(info, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77843_MUIC_ADC_GROUND:
+ ret = max77843_muic_adc_gnd_handler(info);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
+ case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ ret = max77843_muic_jig_handler(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX77843_MUIC_ADC_SEND_END_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX77843_MUIC_ADC_RESERVED_ACC_1:
+ case MAX77843_MUIC_ADC_RESERVED_ACC_2:
+ case MAX77843_MUIC_ADC_RESERVED_ACC_4:
+ case MAX77843_MUIC_ADC_RESERVED_ACC_5:
+ case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
+ case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX77843_MUIC_ADC_TTY_CONVERTER:
+ case MAX77843_MUIC_ADC_UART_CABLE:
+ case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
+ case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
+ case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
+ case MAX77843_MUIC_ADC_OPEN:
+ dev_err(info->dev,
+ "accessory is %s but it isn't used (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (adc:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77843_muic_chg_handler(struct max77843_muic_info *info)
+{
+ int ret, chg_type, gnd_type;
+ bool attached;
+
+ chg_type = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_CHG, &attached);
+
+ dev_dbg(info->dev,
+ "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+ attached ? "attached" : "detached",
+ chg_type, info->prev_chg_type);
+
+ switch (chg_type) {
+ case MAX77843_MUIC_CHG_USB:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_USB,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB, attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+ break;
+ case MAX77843_MUIC_CHG_DOWNSTREAM:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
+ attached);
+ break;
+ case MAX77843_MUIC_CHG_DEDICATED:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ attached);
+ break;
+ case MAX77843_MUIC_CHG_SPECIAL_500MA:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
+ attached);
+ break;
+ case MAX77843_MUIC_CHG_SPECIAL_1A:
+ ret = max77843_muic_set_path(info,
+ MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
+ attached);
+ break;
+ case MAX77843_MUIC_CHG_GND:
+ gnd_type = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_ADC_GND, &attached);
+
+ /* Charger cable on MHL accessory is attach or detach */
+ if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ true);
+ else if (gnd_type == MAX77843_MUIC_GND_MHL)
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ false);
+ break;
+ case MAX77843_MUIC_CHG_DOCK:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
+ break;
+ case MAX77843_MUIC_CHG_NONE:
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (chg_type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+
+ max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
+ attached, false);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void max77843_muic_irq_work(struct work_struct *work)
+{
+ struct max77843_muic_info *info = container_of(work,
+ struct max77843_muic_info, irq_work);
+ struct max77693_dev *max77843 = info->max77843;
+ int ret = 0;
+
+ mutex_lock(&info->mutex);
+
+ ret = regmap_bulk_read(max77843->regmap_muic,
+ MAX77843_MUIC_REG_STATUS1, info->status,
+ MAX77843_MUIC_STATUS_NUM);
+ if (ret) {
+ dev_err(info->dev, "Cannot read STATUS registers\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ if (info->irq_adc) {
+ ret = max77843_muic_adc_handler(info);
+ if (ret)
+ dev_err(info->dev, "Unknown cable type\n");
+ info->irq_adc = false;
+ }
+
+ if (info->irq_chg) {
+ ret = max77843_muic_chg_handler(info);
+ if (ret)
+ dev_err(info->dev, "Unknown charger type\n");
+ info->irq_chg = false;
+ }
+
+ mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
+{
+ struct max77843_muic_info *info = data;
+ int i, irq_type = -1;
+
+ for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
+ if (irq == max77843_muic_irqs[i].virq)
+ irq_type = max77843_muic_irqs[i].irq;
+
+ switch (irq_type) {
+ case MAX77843_MUIC_IRQ_INT1_ADC:
+ case MAX77843_MUIC_IRQ_INT1_ADCERROR:
+ case MAX77843_MUIC_IRQ_INT1_ADC1K:
+ info->irq_adc = true;
+ break;
+ case MAX77843_MUIC_IRQ_INT2_CHGTYP:
+ case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
+ case MAX77843_MUIC_IRQ_INT2_DCDTMR:
+ case MAX77843_MUIC_IRQ_INT2_DXOVP:
+ case MAX77843_MUIC_IRQ_INT2_VBVOLT:
+ info->irq_chg = true;
+ break;
+ case MAX77843_MUIC_IRQ_INT3_VBADC:
+ case MAX77843_MUIC_IRQ_INT3_VDNMON:
+ case MAX77843_MUIC_IRQ_INT3_DNRES:
+ case MAX77843_MUIC_IRQ_INT3_MPNACK:
+ case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
+ case MAX77843_MUIC_IRQ_INT3_MRXTRF:
+ case MAX77843_MUIC_IRQ_INT3_MRXPERR:
+ case MAX77843_MUIC_IRQ_INT3_MRXRDY:
+ break;
+ default:
+ dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
+ break;
+ }
+
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void max77843_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max77843_muic_info *info = container_of(to_delayed_work(work),
+ struct max77843_muic_info, wq_detcable);
+ struct max77693_dev *max77843 = info->max77843;
+ int chg_type, adc, ret;
+ bool attached;
+
+ mutex_lock(&info->mutex);
+
+ ret = regmap_bulk_read(max77843->regmap_muic,
+ MAX77843_MUIC_REG_STATUS1, info->status,
+ MAX77843_MUIC_STATUS_NUM);
+ if (ret) {
+ dev_err(info->dev, "Cannot read STATUS registers\n");
+ goto err_cable_wq;
+ }
+
+ adc = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_ADC, &attached);
+ if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
+ ret = max77843_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect accessory\n");
+ goto err_cable_wq;
+ }
+ }
+
+ chg_type = max77843_muic_get_cable_type(info,
+ MAX77843_CABLE_GROUP_CHG, &attached);
+ if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
+ ret = max77843_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger accessory\n");
+ goto err_cable_wq;
+ }
+ }
+
+err_cable_wq:
+ mutex_unlock(&info->mutex);
+}
+
+static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
+ enum max77843_muic_adc_debounce_time time)
+{
+ struct max77693_dev *max77843 = info->max77843;
+ int ret;
+
+ switch (time) {
+ case MAX77843_DEBOUNCE_TIME_5MS:
+ case MAX77843_DEBOUNCE_TIME_10MS:
+ case MAX77843_DEBOUNCE_TIME_25MS:
+ case MAX77843_DEBOUNCE_TIME_38_62MS:
+ ret = regmap_update_bits(max77843->regmap_muic,
+ MAX77843_MUIC_REG_CONTROL4,
+ MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
+ time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot write MUIC regmap\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77843_init_muic_regmap(struct max77693_dev *max77843)
+{
+ int ret;
+
+ max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
+ I2C_ADDR_MUIC);
+ if (!max77843->i2c_muic) {
+ dev_err(&max77843->i2c->dev,
+ "Cannot allocate I2C device for MUIC\n");
+ return -ENOMEM;
+ }
+
+ i2c_set_clientdata(max77843->i2c_muic, max77843);
+
+ max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
+ &max77843_muic_regmap_config);
+ if (IS_ERR(max77843->regmap_muic)) {
+ ret = PTR_ERR(max77843->regmap_muic);
+ goto err_muic_i2c;
+ }
+
+ ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
+ 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
+ if (ret < 0) {
+ dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
+ goto err_muic_i2c;
+ }
+
+ return 0;
+
+err_muic_i2c:
+ i2c_unregister_device(max77843->i2c_muic);
+
+ return ret;
+}
+
+static int max77843_muic_probe(struct platform_device *pdev)
+{
+ struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
+ struct max77843_muic_info *info;
+ unsigned int id;
+ int i, ret;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->max77843 = max77843;
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ /* Initialize i2c and regmap */
+ ret = max77843_init_muic_regmap(max77843);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
+ return ret;
+ }
+
+ /* Turn off auto detection configuration */
+ ret = regmap_update_bits(max77843->regmap_muic,
+ MAX77843_MUIC_REG_CONTROL4,
+ MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
+ MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
+ CONTROL4_AUTO_DISABLE);
+
+ /* Initialize extcon device */
+ info->edev = devm_extcon_dev_allocate(&pdev->dev,
+ max77843_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
+ ret = -ENODEV;
+ goto err_muic_irq;
+ }
+
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register extcon device\n");
+ goto err_muic_irq;
+ }
+
+ /* Set ADC debounce time */
+ max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
+
+ /* Set initial path for UART */
+ max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true,
+ false);
+
+ /* Check revision number of MUIC device */
+ ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to read revision number\n");
+ goto err_muic_irq;
+ }
+ dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
+
+ /* Support virtual irq domain for max77843 MUIC device */
+ INIT_WORK(&info->irq_work, max77843_muic_irq_work);
+
+ /* Clear IRQ bits before request IRQs */
+ ret = regmap_bulk_read(max77843->regmap_muic,
+ MAX77843_MUIC_REG_INT1, info->status,
+ MAX77843_MUIC_STATUS_NUM);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
+ goto err_muic_irq;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
+ struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
+ int virq = 0;
+
+ virq = regmap_irq_get_virq(max77843->irq_data_muic,
+ muic_irq->irq);
+ if (virq <= 0) {
+ ret = -EINVAL;
+ goto err_muic_irq;
+ }
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+ max77843_muic_irq_handler, IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to request irq (IRQ: %d, error: %d)\n",
+ muic_irq->irq, ret);
+ goto err_muic_irq;
+ }
+ }
+
+ /* Detect accessory after completing the initialization of platform */
+ INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq,
+ &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+ return 0;
+
+err_muic_irq:
+ regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
+ i2c_unregister_device(max77843->i2c_muic);
+
+ return ret;
+}
+
+static int max77843_muic_remove(struct platform_device *pdev)
+{
+ struct max77843_muic_info *info = platform_get_drvdata(pdev);
+ struct max77693_dev *max77843 = info->max77843;
+
+ cancel_work_sync(&info->irq_work);
+ regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
+ i2c_unregister_device(max77843->i2c_muic);
+
+ return 0;
+}
+
+static const struct platform_device_id max77843_muic_id[] = {
+ { "max77843-muic", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(platform, max77843_muic_id);
+
+static struct platform_driver max77843_muic_driver = {
+ .driver = {
+ .name = "max77843-muic",
+ },
+ .probe = max77843_muic_probe,
+ .remove = max77843_muic_remove,
+ .id_table = max77843_muic_id,
+};
+
+static int __init max77843_muic_init(void)
+{
+ return platform_driver_register(&max77843_muic_driver);
+}
+subsys_initcall(max77843_muic_init);
+
+MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
+MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
new file mode 100644
index 0000000..9f30f49
--- /dev/null
+++ b/drivers/extcon/extcon-max8997.c
@@ -0,0 +1,787 @@
+/*
+ * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Donggeun Kim <dg77.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/kobject.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+#include <linux/extcon-provider.h>
+#include <linux/irqdomain.h>
+
+#define DEV_NAME "max8997-muic"
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
+
+enum max8997_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
+ ADC_DEBOUNCE_TIME_10MS, /* 10ms */
+ ADC_DEBOUNCE_TIME_25MS, /* 25ms */
+ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
+};
+
+struct max8997_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max8997_muic_irq muic_irqs[] = {
+ { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
+ { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
+ { MAX8997_MUICIRQ_ADC, "muic-ADC" },
+ { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
+ { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
+ { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
+ { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
+ { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
+ { MAX8997_MUICIRQ_OVP, "muic-OVP" },
+};
+
+/* Define supported cable type */
+enum max8997_muic_acc_type {
+ MAX8997_MUIC_ADC_GROUND = 0x0,
+ MAX8997_MUIC_ADC_MHL, /* MHL*/
+ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX8997_MUIC_ADC_RESERVED_ACC_1,
+ MAX8997_MUIC_ADC_RESERVED_ACC_2,
+ MAX8997_MUIC_ADC_RESERVED_ACC_3,
+ MAX8997_MUIC_ADC_RESERVED_ACC_4,
+ MAX8997_MUIC_ADC_RESERVED_ACC_5,
+ MAX8997_MUIC_ADC_CEA936_AUDIO,
+ MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX8997_MUIC_ADC_TTY_CONVERTER,
+ MAX8997_MUIC_ADC_UART_CABLE,
+ MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
+ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
+ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
+ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX8997_MUIC_ADC_OPEN, /* OPEN */
+};
+
+enum max8997_muic_cable_group {
+ MAX8997_CABLE_GROUP_ADC = 0,
+ MAX8997_CABLE_GROUP_ADC_GND,
+ MAX8997_CABLE_GROUP_CHG,
+ MAX8997_CABLE_GROUP_VBVOLT,
+};
+
+enum max8997_muic_usb_type {
+ MAX8997_USB_HOST,
+ MAX8997_USB_DEVICE,
+};
+
+enum max8997_muic_charger_type {
+ MAX8997_CHARGER_TYPE_NONE = 0,
+ MAX8997_CHARGER_TYPE_USB,
+ MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX8997_CHARGER_TYPE_DEDICATED_CHG,
+ MAX8997_CHARGER_TYPE_500MA,
+ MAX8997_CHARGER_TYPE_1A,
+ MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
+};
+
+struct max8997_muic_info {
+ struct device *dev;
+ struct i2c_client *muic;
+ struct extcon_dev *edev;
+ int prev_cable_type;
+ int prev_chg_type;
+ u8 status[2];
+
+ int irq;
+ struct work_struct irq_work;
+ struct mutex mutex;
+
+ struct max8997_muic_platform_data *muic_pdata;
+ enum max8997_muic_charger_type pre_charger_type;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
+
+static const unsigned int max8997_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_CHG_USB_FAST,
+ EXTCON_CHG_USB_SLOW,
+ EXTCON_CHG_USB_CDP,
+ EXTCON_DISP_MHL,
+ EXTCON_DOCK,
+ EXTCON_JIG,
+ EXTCON_NONE,
+};
+
+/*
+ * max8997_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max8997 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
+ enum max8997_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_0_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL3,
+ time << CONTROL3_ADCDBSET_SHIFT,
+ CONTROL3_ADCDBSET_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
+ * max8997_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max8997 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max8997 MUIC device share outside H/W line among a varity of cables,
+ * so this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max8997_muic_set_path(struct max8997_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return ret;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+/*
+ * max8997_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max8997 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - MAX8997_CABLE_GROUP_ADC
+ * - MAX8997_CABLE_GROUP_CHG
+ */
+static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
+ enum max8997_muic_cable_group group, bool *attached)
+{
+ int cable_type = 0;
+ int adc;
+ int chg_type;
+
+ switch (group) {
+ case MAX8997_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX8997_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX8997_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
+static int max8997_muic_handle_usb(struct max8997_muic_info *info,
+ enum max8997_muic_usb_type usb_type, bool attached)
+{
+ int ret = 0;
+
+ if (usb_type == MAX8997_USB_HOST) {
+ ret = max8997_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update muic register\n");
+ return ret;
+ }
+ }
+
+ switch (usb_type) {
+ case MAX8997_USB_HOST:
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
+ break;
+ case MAX8997_USB_DEVICE:
+ extcon_set_state_sync(info->edev, EXTCON_USB, attached);
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s usb cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max8997_muic_handle_dock(struct max8997_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret = 0;
+
+ ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret) {
+ dev_err(info->dev, "failed to update muic register\n");
+ return ret;
+ }
+
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
+ extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s dock device\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
+ bool attached)
+{
+ int ret = 0;
+
+ /* switch to UART */
+ ret = max8997_muic_set_path(info, info->path_uart, attached);
+ if (ret) {
+ dev_err(info->dev, "failed to update muic register\n");
+ return ret;
+ }
+
+ extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
+
+ return 0;
+}
+
+static int max8997_muic_adc_handler(struct max8997_muic_info *info)
+{
+ int cable_type;
+ bool attached;
+ int ret = 0;
+
+ /* Check cable state which is either detached or attached */
+ cable_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_ADC, &attached);
+
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_GROUND:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_MHL:
+ extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
+ ret = max8997_muic_handle_usb(info,
+ MAX8997_USB_DEVICE, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
+ ret = max8997_muic_handle_dock(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ ret = max8997_muic_handle_jig_uart(info, attached);
+ break;
+ case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_1:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_2:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_3:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_4:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_5:
+ case MAX8997_MUIC_ADC_CEA936_AUDIO:
+ case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX8997_MUIC_ADC_TTY_CONVERTER:
+ case MAX8997_MUIC_ADC_UART_CABLE:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
+ case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
+ /*
+ * This cable isn't used in general case if it is specially
+ * needed to detect additional cable, should implement
+ * proper operation when this cable is attached/detached.
+ */
+ dev_info(info->dev,
+ "cable is %s but it isn't used (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s unknown cable (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max8997_muic_chg_handler(struct max8997_muic_info *info)
+{
+ int chg_type;
+ bool attached;
+ int adc;
+
+ chg_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_CHG, &attached);
+
+ switch (chg_type) {
+ case MAX8997_CHARGER_TYPE_NONE:
+ break;
+ case MAX8997_CHARGER_TYPE_USB:
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
+ max8997_muic_handle_usb(info,
+ MAX8997_USB_DEVICE, attached);
+ }
+ break;
+ case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
+ attached);
+ break;
+ case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
+ attached);
+ break;
+ case MAX8997_CHARGER_TYPE_500MA:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
+ attached);
+ break;
+ case MAX8997_CHARGER_TYPE_1A:
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
+ attached);
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s unknown chg cable (type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void max8997_muic_irq_work(struct work_struct *work)
+{
+ struct max8997_muic_info *info = container_of(work,
+ struct max8997_muic_info, irq_work);
+ int irq_type = 0;
+ int i, ret;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
+ ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
+ 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read muic register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ switch (irq_type) {
+ case MAX8997_MUICIRQ_ADCError:
+ case MAX8997_MUICIRQ_ADCLow:
+ case MAX8997_MUICIRQ_ADC:
+ /* Handle all of cable except for charger cable */
+ ret = max8997_muic_adc_handler(info);
+ break;
+ case MAX8997_MUICIRQ_VBVolt:
+ case MAX8997_MUICIRQ_DBChg:
+ case MAX8997_MUICIRQ_DCDTmr:
+ case MAX8997_MUICIRQ_ChgDetRun:
+ case MAX8997_MUICIRQ_ChgTyp:
+ /* Handle charger cable */
+ ret = max8997_muic_chg_handler(info);
+ break;
+ case MAX8997_MUICIRQ_OVP:
+ break;
+ default:
+ dev_info(info->dev, "misc interrupt: irq %d occurred\n",
+ irq_type);
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
+{
+ struct max8997_muic_info *info = data;
+
+ dev_dbg(info->dev, "irq:%d\n", irq);
+ info->irq = irq;
+
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static int max8997_muic_detect_dev(struct max8997_muic_info *info)
+{
+ int ret = 0;
+ int adc;
+ int chg_type;
+ bool attached;
+
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max8997_bulk_read(info->muic,
+ MAX8997_MUIC_REG_STATUS1, 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+
+ adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
+ ret = max8997_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect ADC cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
+ ret = max8997_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
+
+static void max8997_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max8997_muic_info *info = container_of(to_delayed_work(work),
+ struct max8997_muic_info, wq_detcable);
+ int ret;
+
+ ret = max8997_muic_detect_dev(info);
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect cable type\n");
+}
+
+static int max8997_muic_probe(struct platform_device *pdev)
+{
+ struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
+ struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
+ struct max8997_muic_info *info;
+ int delay_jiffies;
+ int ret, i;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->muic = max8997->muic;
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, max8997_muic_irq_work);
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+ struct max8997_muic_irq *muic_irq = &muic_irqs[i];
+ unsigned int virq = 0;
+
+ virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
+ if (!virq) {
+ ret = -EINVAL;
+ goto err_irq;
+ }
+ muic_irq->virq = virq;
+
+ ret = request_threaded_irq(virq, NULL,
+ max8997_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ goto err_irq;
+ }
+ }
+
+ /* External connector */
+ info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ ret = -ENOMEM;
+ goto err_irq;
+ }
+
+ ret = devm_extcon_dev_register(&pdev->dev, info->edev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ goto err_irq;
+ }
+
+ if (pdata && pdata->muic_pdata) {
+ struct max8997_muic_platform_data *muic_pdata
+ = pdata->muic_pdata;
+
+ /* Initialize registers according to platform data */
+ for (i = 0; i < muic_pdata->num_init_data; i++) {
+ max8997_write_reg(info->muic,
+ muic_pdata->init_data[i].addr,
+ muic_pdata->init_data[i].data);
+ }
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ if (muic_pdata->path_uart)
+ info->path_uart = muic_pdata->path_uart;
+ else
+ info->path_uart = CONTROL1_SW_UART;
+
+ if (muic_pdata->path_usb)
+ info->path_usb = muic_pdata->path_usb;
+ else
+ info->path_usb = CONTROL1_SW_USB;
+
+ /*
+ * Default delay time for detecting cable state
+ * after certain time.
+ */
+ if (muic_pdata->detcable_delay_ms)
+ delay_jiffies =
+ msecs_to_jiffies(muic_pdata->detcable_delay_ms);
+ else
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ } else {
+ info->path_uart = CONTROL1_SW_UART;
+ info->path_usb = CONTROL1_SW_USB;
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ }
+
+ /* Set initial path for UART */
+ max8997_muic_set_path(info, info->path_uart, true);
+
+ /* Set ADC debounce time */
+ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ delay_jiffies);
+
+ return 0;
+
+err_irq:
+ while (--i >= 0)
+ free_irq(muic_irqs[i].virq, info);
+ return ret;
+}
+
+static int max8997_muic_remove(struct platform_device *pdev)
+{
+ struct max8997_muic_info *info = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ free_irq(muic_irqs[i].virq, info);
+ cancel_work_sync(&info->irq_work);
+
+ return 0;
+}
+
+static struct platform_driver max8997_muic_driver = {
+ .driver = {
+ .name = DEV_NAME,
+ },
+ .probe = max8997_muic_probe,
+ .remove = max8997_muic_remove,
+};
+
+module_platform_driver(max8997_muic_driver);
+
+MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
+MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
new file mode 100644
index 0000000..2af4369
--- /dev/null
+++ b/drivers/extcon/extcon-palmas.c
@@ -0,0 +1,452 @@
+/*
+ * Palmas USB transceiver driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Graeme Gregory <gg@slimlogic.co.uk>
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * Based on twl6030_usb.c
+ *
+ * Author: Hema HK <hemahk@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/mfd/palmas.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/workqueue.h>
+
+#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
+
+static const unsigned int palmas_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static void palmas_usb_wakeup(struct palmas *palmas, int enable)
+{
+ if (enable)
+ palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP,
+ PALMAS_USB_WAKEUP_ID_WK_UP_COMP);
+ else
+ palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, 0);
+}
+
+static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb)
+{
+ struct palmas_usb *palmas_usb = _palmas_usb;
+ struct extcon_dev *edev = palmas_usb->edev;
+ unsigned int vbus_line_state;
+
+ palmas_read(palmas_usb->palmas, PALMAS_INTERRUPT_BASE,
+ PALMAS_INT3_LINE_STATE, &vbus_line_state);
+
+ if (vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS) {
+ if (palmas_usb->linkstat != PALMAS_USB_STATE_VBUS) {
+ palmas_usb->linkstat = PALMAS_USB_STATE_VBUS;
+ extcon_set_state_sync(edev, EXTCON_USB, true);
+ dev_dbg(palmas_usb->dev, "USB cable is attached\n");
+ } else {
+ dev_dbg(palmas_usb->dev,
+ "Spurious connect event detected\n");
+ }
+ } else if (!(vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS)) {
+ if (palmas_usb->linkstat == PALMAS_USB_STATE_VBUS) {
+ palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
+ extcon_set_state_sync(edev, EXTCON_USB, false);
+ dev_dbg(palmas_usb->dev, "USB cable is detached\n");
+ } else {
+ dev_dbg(palmas_usb->dev,
+ "Spurious disconnect event detected\n");
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
+{
+ unsigned int set, id_src;
+ struct palmas_usb *palmas_usb = _palmas_usb;
+ struct extcon_dev *edev = palmas_usb->edev;
+
+ palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_LATCH_SET, &set);
+ palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_SRC, &id_src);
+
+ if ((set & PALMAS_USB_ID_INT_SRC_ID_GND) &&
+ (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_LATCH_CLR,
+ PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND);
+ palmas_usb->linkstat = PALMAS_USB_STATE_ID;
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
+ dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n");
+ } else if ((set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) &&
+ (id_src & PALMAS_USB_ID_INT_SRC_ID_FLOAT)) {
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_LATCH_CLR,
+ PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT);
+ palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
+ dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
+ } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_ID) &&
+ (!(set & PALMAS_USB_ID_INT_SRC_ID_GND))) {
+ palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
+ dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
+ } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_DISCONNECT) &&
+ (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
+ palmas_usb->linkstat = PALMAS_USB_STATE_ID;
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
+ dev_dbg(palmas_usb->dev, " USB-HOST cable is attached\n");
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void palmas_gpio_id_detect(struct work_struct *work)
+{
+ int id;
+ struct palmas_usb *palmas_usb = container_of(to_delayed_work(work),
+ struct palmas_usb,
+ wq_detectid);
+ struct extcon_dev *edev = palmas_usb->edev;
+
+ if (!palmas_usb->id_gpiod)
+ return;
+
+ id = gpiod_get_value_cansleep(palmas_usb->id_gpiod);
+
+ if (id) {
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
+ dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
+ } else {
+ extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
+ dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n");
+ }
+}
+
+static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb)
+{
+ struct palmas_usb *palmas_usb = _palmas_usb;
+
+ queue_delayed_work(system_power_efficient_wq, &palmas_usb->wq_detectid,
+ palmas_usb->sw_debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
+static void palmas_enable_irq(struct palmas_usb *palmas_usb)
+{
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_VBUS_CTRL_SET,
+ PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
+
+ if (palmas_usb->enable_id_detection) {
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_CTRL_SET,
+ PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
+
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_EN_HI_SET,
+ PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
+ PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
+ }
+
+ if (palmas_usb->enable_vbus_detection)
+ palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
+
+ /* cold plug for host mode needs this delay */
+ if (palmas_usb->enable_id_detection) {
+ msleep(30);
+ palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
+ }
+}
+
+static int palmas_usb_probe(struct platform_device *pdev)
+{
+ struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
+ struct palmas_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device_node *node = pdev->dev.of_node;
+ struct palmas_usb *palmas_usb;
+ int status;
+
+ if (!palmas) {
+ dev_err(&pdev->dev, "failed to get valid parent\n");
+ return -EINVAL;
+ }
+
+ palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
+ if (!palmas_usb)
+ return -ENOMEM;
+
+ if (node && !pdata) {
+ palmas_usb->wakeup = of_property_read_bool(node, "ti,wakeup");
+ palmas_usb->enable_id_detection = of_property_read_bool(node,
+ "ti,enable-id-detection");
+ palmas_usb->enable_vbus_detection = of_property_read_bool(node,
+ "ti,enable-vbus-detection");
+ } else {
+ palmas_usb->wakeup = true;
+ palmas_usb->enable_id_detection = true;
+ palmas_usb->enable_vbus_detection = true;
+
+ if (pdata)
+ palmas_usb->wakeup = pdata->wakeup;
+ }
+
+ palmas_usb->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id",
+ GPIOD_IN);
+ if (IS_ERR(palmas_usb->id_gpiod)) {
+ dev_err(&pdev->dev, "failed to get id gpio\n");
+ return PTR_ERR(palmas_usb->id_gpiod);
+ }
+
+ palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus",
+ GPIOD_IN);
+ if (IS_ERR(palmas_usb->vbus_gpiod)) {
+ dev_err(&pdev->dev, "failed to get vbus gpio\n");
+ return PTR_ERR(palmas_usb->vbus_gpiod);
+ }
+
+ if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
+ palmas_usb->enable_id_detection = false;
+ palmas_usb->enable_gpio_id_detection = true;
+ }
+
+ if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) {
+ palmas_usb->enable_vbus_detection = false;
+ palmas_usb->enable_gpio_vbus_detection = true;
+ }
+
+ if (palmas_usb->enable_gpio_id_detection) {
+ u32 debounce;
+
+ if (of_property_read_u32(node, "debounce-delay-ms", &debounce))
+ debounce = USB_GPIO_DEBOUNCE_MS;
+
+ status = gpiod_set_debounce(palmas_usb->id_gpiod,
+ debounce * 1000);
+ if (status < 0)
+ palmas_usb->sw_debounce_jiffies = msecs_to_jiffies(debounce);
+ }
+
+ INIT_DELAYED_WORK(&palmas_usb->wq_detectid, palmas_gpio_id_detect);
+
+ palmas->usb = palmas_usb;
+ palmas_usb->palmas = palmas;
+
+ palmas_usb->dev = &pdev->dev;
+
+ palmas_usb_wakeup(palmas, palmas_usb->wakeup);
+
+ platform_set_drvdata(pdev, palmas_usb);
+
+ palmas_usb->edev = devm_extcon_dev_allocate(&pdev->dev,
+ palmas_extcon_cable);
+ if (IS_ERR(palmas_usb->edev)) {
+ dev_err(&pdev->dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ status = devm_extcon_dev_register(&pdev->dev, palmas_usb->edev);
+ if (status) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ return status;
+ }
+
+ if (palmas_usb->enable_id_detection) {
+ palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_ID_OTG_IRQ);
+ palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_ID_IRQ);
+ status = devm_request_threaded_irq(palmas_usb->dev,
+ palmas_usb->id_irq,
+ NULL, palmas_id_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT,
+ "palmas_usb_id", palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ palmas_usb->id_irq, status);
+ return status;
+ }
+ } else if (palmas_usb->enable_gpio_id_detection) {
+ palmas_usb->gpio_id_irq = gpiod_to_irq(palmas_usb->id_gpiod);
+ if (palmas_usb->gpio_id_irq < 0) {
+ dev_err(&pdev->dev, "failed to get id irq\n");
+ return palmas_usb->gpio_id_irq;
+ }
+ status = devm_request_threaded_irq(&pdev->dev,
+ palmas_usb->gpio_id_irq,
+ NULL,
+ palmas_gpio_id_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "palmas_usb_id",
+ palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev,
+ "failed to request handler for id irq\n");
+ return status;
+ }
+ }
+
+ if (palmas_usb->enable_vbus_detection) {
+ palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_OTG_IRQ);
+ palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_IRQ);
+ status = devm_request_threaded_irq(palmas_usb->dev,
+ palmas_usb->vbus_irq, NULL,
+ palmas_vbus_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT,
+ "palmas_usb_vbus", palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ palmas_usb->vbus_irq, status);
+ return status;
+ }
+ } else if (palmas_usb->enable_gpio_vbus_detection) {
+ /* remux GPIO_1 as VBUSDET */
+ status = palmas_update_bits(palmas,
+ PALMAS_PU_PD_OD_BASE,
+ PALMAS_PRIMARY_SECONDARY_PAD1,
+ PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK,
+ (1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT));
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't remux GPIO1\n");
+ return status;
+ }
+
+ palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_OTG_IRQ);
+ palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod);
+ if (palmas_usb->gpio_vbus_irq < 0) {
+ dev_err(&pdev->dev, "failed to get vbus irq\n");
+ return palmas_usb->gpio_vbus_irq;
+ }
+ status = devm_request_threaded_irq(&pdev->dev,
+ palmas_usb->gpio_vbus_irq,
+ NULL,
+ palmas_vbus_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT,
+ "palmas_usb_vbus",
+ palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev,
+ "failed to request handler for vbus irq\n");
+ return status;
+ }
+ }
+
+ palmas_enable_irq(palmas_usb);
+ /* perform initial detection */
+ if (palmas_usb->enable_gpio_vbus_detection)
+ palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb);
+ palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
+ device_set_wakeup_capable(&pdev->dev, true);
+ return 0;
+}
+
+static int palmas_usb_remove(struct platform_device *pdev)
+{
+ struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&palmas_usb->wq_detectid);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int palmas_usb_suspend(struct device *dev)
+{
+ struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev)) {
+ if (palmas_usb->enable_vbus_detection)
+ enable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_gpio_vbus_detection)
+ enable_irq_wake(palmas_usb->gpio_vbus_irq);
+ if (palmas_usb->enable_id_detection)
+ enable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_gpio_id_detection)
+ enable_irq_wake(palmas_usb->gpio_id_irq);
+ }
+ return 0;
+}
+
+static int palmas_usb_resume(struct device *dev)
+{
+ struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev)) {
+ if (palmas_usb->enable_vbus_detection)
+ disable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_gpio_vbus_detection)
+ disable_irq_wake(palmas_usb->gpio_vbus_irq);
+ if (palmas_usb->enable_id_detection)
+ disable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_gpio_id_detection)
+ disable_irq_wake(palmas_usb->gpio_id_irq);
+ }
+
+ /* check if GPIO states changed while suspend/resume */
+ if (palmas_usb->enable_gpio_vbus_detection)
+ palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb);
+ palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
+
+ return 0;
+};
+#endif
+
+static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume);
+
+static const struct of_device_id of_palmas_match_tbl[] = {
+ { .compatible = "ti,palmas-usb", },
+ { .compatible = "ti,palmas-usb-vid", },
+ { .compatible = "ti,twl6035-usb", },
+ { .compatible = "ti,twl6035-usb-vid", },
+ { /* end */ }
+};
+
+static struct platform_driver palmas_usb_driver = {
+ .probe = palmas_usb_probe,
+ .remove = palmas_usb_remove,
+ .driver = {
+ .name = "palmas-usb",
+ .of_match_table = of_palmas_match_tbl,
+ .pm = &palmas_pm_ops,
+ },
+};
+
+module_platform_driver(palmas_usb_driver);
+
+MODULE_ALIAS("platform:palmas-usb");
+MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
+MODULE_DESCRIPTION("Palmas USB transceiver driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
diff --git a/drivers/extcon/extcon-qcom-spmi-misc.c b/drivers/extcon/extcon-qcom-spmi-misc.c
new file mode 100644
index 0000000..72bc0f2
--- /dev/null
+++ b/drivers/extcon/extcon-qcom-spmi-misc.c
@@ -0,0 +1,171 @@
+/**
+ * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID
+ * detection based on extcon-usb-gpio.c.
+ *
+ * Copyright (C) 2016 Linaro, Ltd.
+ * Stephen Boyd <stephen.boyd@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#define USB_ID_DEBOUNCE_MS 5 /* ms */
+
+struct qcom_usb_extcon_info {
+ struct extcon_dev *edev;
+ int irq;
+ struct delayed_work wq_detcable;
+ unsigned long debounce_jiffies;
+};
+
+static const unsigned int qcom_usb_extcon_cable[] = {
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static void qcom_usb_extcon_detect_cable(struct work_struct *work)
+{
+ bool id;
+ int ret;
+ struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work),
+ struct qcom_usb_extcon_info,
+ wq_detcable);
+
+ /* check ID and update cable state */
+ ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id);
+ if (ret)
+ return;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id);
+}
+
+static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id)
+{
+ struct qcom_usb_extcon_info *info = dev_id;
+
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ info->debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
+static int qcom_usb_extcon_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct qcom_usb_extcon_info *info;
+ int ret;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->edev = devm_extcon_dev_allocate(dev, qcom_usb_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(dev, info->edev);
+ if (ret < 0) {
+ dev_err(dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS);
+ INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable);
+
+ info->irq = platform_get_irq_byname(pdev, "usb_id");
+ if (info->irq < 0)
+ return info->irq;
+
+ ret = devm_request_threaded_irq(dev, info->irq, NULL,
+ qcom_usb_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request handler for ID IRQ\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, info);
+ device_init_wakeup(dev, 1);
+
+ /* Perform initial detection */
+ qcom_usb_extcon_detect_cable(&info->wq_detcable.work);
+
+ return 0;
+}
+
+static int qcom_usb_extcon_remove(struct platform_device *pdev)
+{
+ struct qcom_usb_extcon_info *info = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&info->wq_detcable);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int qcom_usb_extcon_suspend(struct device *dev)
+{
+ struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (device_may_wakeup(dev))
+ ret = enable_irq_wake(info->irq);
+
+ return ret;
+}
+
+static int qcom_usb_extcon_resume(struct device *dev)
+{
+ struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (device_may_wakeup(dev))
+ ret = disable_irq_wake(info->irq);
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(qcom_usb_extcon_pm_ops,
+ qcom_usb_extcon_suspend, qcom_usb_extcon_resume);
+
+static const struct of_device_id qcom_usb_extcon_dt_match[] = {
+ { .compatible = "qcom,pm8941-misc", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_usb_extcon_dt_match);
+
+static struct platform_driver qcom_usb_extcon_driver = {
+ .probe = qcom_usb_extcon_probe,
+ .remove = qcom_usb_extcon_remove,
+ .driver = {
+ .name = "extcon-pm8941-misc",
+ .pm = &qcom_usb_extcon_pm_ops,
+ .of_match_table = qcom_usb_extcon_dt_match,
+ },
+};
+module_platform_driver(qcom_usb_extcon_driver);
+
+MODULE_DESCRIPTION("QCOM USB ID extcon driver");
+MODULE_AUTHOR("Stephen Boyd <stephen.boyd@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
new file mode 100644
index 0000000..e059bd5
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -0,0 +1,719 @@
+/*
+ * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon-provider.h>
+
+#include "extcon-rt8973a.h"
+
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
+
+struct muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+struct reg_data {
+ u8 reg;
+ u8 mask;
+ u8 val;
+ bool invert;
+};
+
+struct rt8973a_muic_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+
+ struct regmap_irq_chip_data *irq_data;
+ struct muic_irq *muic_irqs;
+ unsigned int num_muic_irqs;
+ int irq;
+ bool irq_attach;
+ bool irq_detach;
+ bool irq_ovp;
+ bool irq_otp;
+ struct work_struct irq_work;
+
+ struct reg_data *reg_data;
+ unsigned int num_reg_data;
+ bool auto_config;
+
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+};
+
+/* Default value of RT8973A register to bring up MUIC device. */
+static struct reg_data rt8973a_reg_data[] = {
+ {
+ .reg = RT8973A_REG_CONTROL1,
+ .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
+ | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+ | RT8973A_REG_CONTROL1_CHGTYP_MASK
+ | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
+ | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
+ | RT8973A_REG_CONTROL1_INTM_MASK,
+ .val = RT8973A_REG_CONTROL1_ADC_EN_MASK
+ | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+ | RT8973A_REG_CONTROL1_CHGTYP_MASK,
+ .invert = false,
+ },
+ { /* sentinel */ }
+};
+
+/* List of detectable cables */
+static const unsigned int rt8973a_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_JIG,
+ EXTCON_NONE,
+};
+
+/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
+enum rt8973a_event_type {
+ RT8973A_EVENT_ATTACH = 1,
+ RT8973A_EVENT_DETACH,
+ RT8973A_EVENT_OVP,
+ RT8973A_EVENT_OTP,
+};
+
+/* Define supported accessory type */
+enum rt8973a_muic_acc_type {
+ RT8973A_MUIC_ADC_OTG = 0x0,
+ RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
+ RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
+ RT8973A_MUIC_ADC_RESERVED_ACC_1,
+ RT8973A_MUIC_ADC_RESERVED_ACC_2,
+ RT8973A_MUIC_ADC_RESERVED_ACC_3,
+ RT8973A_MUIC_ADC_RESERVED_ACC_4,
+ RT8973A_MUIC_ADC_RESERVED_ACC_5,
+ RT8973A_MUIC_ADC_AUDIO_TYPE2,
+ RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
+ RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
+ RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
+ RT8973A_MUIC_ADC_TA,
+ RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+ RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+ RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
+ RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
+ RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+ RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+ RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
+ RT8973A_MUIC_ADC_OPEN = 0x1f,
+
+ /*
+ * The below accessories has same ADC value (0x1f).
+ * So, Device type1 is used to separate specific accessory.
+ */
+ /* |---------|--ADC| */
+ /* | [7:5]|[4:0]| */
+ RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */
+};
+
+/* List of supported interrupt for RT8973A */
+static struct muic_irq rt8973a_muic_irqs[] = {
+ { RT8973A_INT1_ATTACH, "muic-attach" },
+ { RT8973A_INT1_DETACH, "muic-detach" },
+ { RT8973A_INT1_CHGDET, "muic-chgdet" },
+ { RT8973A_INT1_DCD_T, "muic-dcd-t" },
+ { RT8973A_INT1_OVP, "muic-ovp" },
+ { RT8973A_INT1_CONNECT, "muic-connect" },
+ { RT8973A_INT1_ADC_CHG, "muic-adc-chg" },
+ { RT8973A_INT1_OTP, "muic-otp" },
+ { RT8973A_INT2_UVLO, "muic-uvlo" },
+ { RT8973A_INT2_POR, "muic-por" },
+ { RT8973A_INT2_OTP_FET, "muic-otp-fet" },
+ { RT8973A_INT2_OVP_FET, "muic-ovp-fet" },
+ { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" },
+ { RT8973A_INT2_OCP, "muic-ocp" },
+ { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },
+};
+
+/* Define interrupt list of RT8973A to register regmap_irq */
+static const struct regmap_irq rt8973a_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
+ { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
+
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
+ { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
+ { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
+ { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
+ { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
+ { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
+ { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
+};
+
+static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
+ .name = "rt8973a",
+ .status_base = RT8973A_REG_INT1,
+ .mask_base = RT8973A_REG_INTM1,
+ .mask_invert = false,
+ .num_regs = 2,
+ .irqs = rt8973a_irqs,
+ .num_irqs = ARRAY_SIZE(rt8973a_irqs),
+};
+
+/* Define regmap configuration of RT8973A for I2C communication */
+static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RT8973A_REG_INTM1:
+ case RT8973A_REG_INTM2:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+static const struct regmap_config rt8973a_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = rt8973a_muic_volatile_reg,
+ .max_register = RT8973A_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
+ unsigned int con_sw, bool attached)
+{
+ int ret;
+
+ /*
+ * Don't need to set h/w path according to cable type
+ * if Auto-configuration mode of CONTROL1 register is true.
+ */
+ if (info->auto_config)
+ return 0;
+
+ if (!attached)
+ con_sw = DM_DP_SWITCH_UART;
+
+ switch (con_sw) {
+ case DM_DP_SWITCH_OPEN:
+ case DM_DP_SWITCH_USB:
+ case DM_DP_SWITCH_UART:
+ ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
+ RT8973A_REG_MANUAL_SW1_DP_MASK |
+ RT8973A_REG_MANUAL_SW1_DM_MASK,
+ con_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update DM_CON/DP_CON switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+ con_sw);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
+{
+ unsigned int adc, dev1;
+ int ret, cable_type;
+
+ /* Read ADC value according to external cable or button */
+ ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
+ if (ret) {
+ dev_err(info->dev, "failed to read ADC register\n");
+ return ret;
+ }
+ cable_type = adc & RT8973A_REG_ADC_MASK;
+
+ /* Read Device 1 reigster to identify correct cable type */
+ ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEV1 register\n");
+ return ret;
+ }
+
+ switch (adc) {
+ case RT8973A_MUIC_ADC_OPEN:
+ if (dev1 & RT8973A_REG_DEV1_USB_MASK)
+ cable_type = RT8973A_MUIC_ADC_USB;
+ else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
+ cable_type = RT8973A_MUIC_ADC_TA;
+ else
+ cable_type = RT8973A_MUIC_ADC_OPEN;
+ break;
+ default:
+ break;
+ }
+
+ return cable_type;
+}
+
+static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
+ enum rt8973a_event_type event)
+{
+ static unsigned int prev_cable_type;
+ unsigned int con_sw = DM_DP_SWITCH_UART;
+ int ret, cable_type;
+ unsigned int id;
+ bool attached = false;
+
+ switch (event) {
+ case RT8973A_EVENT_ATTACH:
+ cable_type = rt8973a_muic_get_cable_type(info);
+ attached = true;
+ break;
+ case RT8973A_EVENT_DETACH:
+ cable_type = prev_cable_type;
+ attached = false;
+ break;
+ case RT8973A_EVENT_OVP:
+ case RT8973A_EVENT_OTP:
+ dev_warn(info->dev,
+ "happen Over %s issue. Need to disconnect all cables\n",
+ event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
+ cable_type = prev_cable_type;
+ attached = false;
+ break;
+ default:
+ dev_err(info->dev,
+ "Cannot handle this event (event:%d)\n", event);
+ return -EINVAL;
+ }
+ prev_cable_type = cable_type;
+
+ switch (cable_type) {
+ case RT8973A_MUIC_ADC_OTG:
+ id = EXTCON_USB_HOST;
+ con_sw = DM_DP_SWITCH_USB;
+ break;
+ case RT8973A_MUIC_ADC_TA:
+ id = EXTCON_CHG_USB_DCP;
+ con_sw = DM_DP_SWITCH_OPEN;
+ break;
+ case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+ case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+ id = EXTCON_JIG;
+ con_sw = DM_DP_SWITCH_USB;
+ break;
+ case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+ case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+ id = EXTCON_JIG;
+ con_sw = DM_DP_SWITCH_UART;
+ break;
+ case RT8973A_MUIC_ADC_USB:
+ id = EXTCON_USB;
+ con_sw = DM_DP_SWITCH_USB;
+ break;
+ case RT8973A_MUIC_ADC_OPEN:
+ return 0;
+ case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
+ case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
+ case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
+ case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
+ case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
+ dev_warn(info->dev,
+ "Unknown accessory type (adc:0x%x)\n", cable_type);
+ return 0;
+ case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
+ case RT8973A_MUIC_ADC_AUDIO_TYPE2:
+ dev_warn(info->dev,
+ "Audio device/button type (adc:0x%x)\n", cable_type);
+ return 0;
+ case RT8973A_MUIC_ADC_RESERVED_ACC_1:
+ case RT8973A_MUIC_ADC_RESERVED_ACC_2:
+ case RT8973A_MUIC_ADC_RESERVED_ACC_3:
+ case RT8973A_MUIC_ADC_RESERVED_ACC_4:
+ case RT8973A_MUIC_ADC_RESERVED_ACC_5:
+ case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
+ return 0;
+ default:
+ dev_err(info->dev,
+ "Cannot handle this cable_type (adc:0x%x)\n",
+ cable_type);
+ return -EINVAL;
+ }
+
+ /* Change internal hardware path(DM_CON/DP_CON) */
+ ret = rt8973a_muic_set_path(info, con_sw, attached);
+ if (ret < 0)
+ return ret;
+
+ /* Change the state of external accessory */
+ extcon_set_state_sync(info->edev, id, attached);
+ if (id == EXTCON_USB)
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+
+ return 0;
+}
+
+static void rt8973a_muic_irq_work(struct work_struct *work)
+{
+ struct rt8973a_muic_info *info = container_of(work,
+ struct rt8973a_muic_info, irq_work);
+ int ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ /* Detect attached or detached cables */
+ if (info->irq_attach) {
+ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+ info->irq_attach = false;
+ }
+
+ if (info->irq_detach) {
+ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
+ info->irq_detach = false;
+ }
+
+ if (info->irq_ovp) {
+ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
+ info->irq_ovp = false;
+ }
+
+ if (info->irq_otp) {
+ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
+ info->irq_otp = false;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
+{
+ struct rt8973a_muic_info *info = data;
+ int i, irq_type = -1;
+
+ for (i = 0; i < info->num_muic_irqs; i++)
+ if (irq == info->muic_irqs[i].virq)
+ irq_type = info->muic_irqs[i].irq;
+
+ switch (irq_type) {
+ case RT8973A_INT1_ATTACH:
+ info->irq_attach = true;
+ break;
+ case RT8973A_INT1_DETACH:
+ info->irq_detach = true;
+ break;
+ case RT8973A_INT1_OVP:
+ info->irq_ovp = true;
+ break;
+ case RT8973A_INT1_OTP:
+ info->irq_otp = true;
+ break;
+ case RT8973A_INT1_CHGDET:
+ case RT8973A_INT1_DCD_T:
+ case RT8973A_INT1_CONNECT:
+ case RT8973A_INT1_ADC_CHG:
+ case RT8973A_INT2_UVLO:
+ case RT8973A_INT2_POR:
+ case RT8973A_INT2_OTP_FET:
+ case RT8973A_INT2_OVP_FET:
+ case RT8973A_INT2_OCP_LATCH:
+ case RT8973A_INT2_OCP:
+ case RT8973A_INT2_OVP_OCP:
+ default:
+ dev_dbg(info->dev,
+ "Cannot handle this interrupt (%d)\n", irq_type);
+ break;
+ }
+
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
+ struct rt8973a_muic_info, wq_detcable);
+ int ret;
+
+ /* Notify the state of connector cable or not */
+ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+ if (ret < 0)
+ dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
+{
+ unsigned int data, vendor_id, version_id;
+ int i, ret;
+
+ /* To test I2C, Print version_id and vendor_id of RT8973A */
+ ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read DEVICE_ID register: %d\n", ret);
+ return;
+ }
+
+ vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
+ RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
+ version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
+ RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
+
+ dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+ version_id, vendor_id);
+
+ /* Initiazle the register of RT8973A device to bring-up */
+ for (i = 0; i < info->num_reg_data; i++) {
+ u8 reg = info->reg_data[i].reg;
+ u8 mask = info->reg_data[i].mask;
+ u8 val = 0;
+
+ if (info->reg_data[i].invert)
+ val = ~info->reg_data[i].val;
+ else
+ val = info->reg_data[i].val;
+
+ regmap_update_bits(info->regmap, reg, mask, val);
+ }
+
+ /* Check whether RT8973A is auto switching mode or not */
+ ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read CONTROL1 register: %d\n", ret);
+ return;
+ }
+
+ data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
+ if (data) {
+ info->auto_config = true;
+ dev_info(info->dev,
+ "Enable Auto-configuration for internal path\n");
+ }
+}
+
+static int rt8973a_muic_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct device_node *np = i2c->dev.of_node;
+ struct rt8973a_muic_info *info;
+ int i, ret, irq_flags;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i2c_set_clientdata(i2c, info);
+
+ info->dev = &i2c->dev;
+ info->i2c = i2c;
+ info->irq = i2c->irq;
+ info->muic_irqs = rt8973a_muic_irqs;
+ info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
+ info->reg_data = rt8973a_reg_data;
+ info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
+
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
+
+ info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(info->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Support irq domain for RT8973A MUIC device */
+ irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+ ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+ &rt8973a_muic_irq_chip, &info->irq_data);
+ if (ret != 0) {
+ dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
+ info->irq, ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->num_muic_irqs; i++) {
+ struct muic_irq *muic_irq = &info->muic_irqs[i];
+ int virq = 0;
+
+ virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(info->dev, virq, NULL,
+ rt8973a_muic_irq_handler,
+ IRQF_NO_SUSPEND | IRQF_ONESHOT,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(info->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Allocate extcon device */
+ info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(info->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(info->dev, info->edev);
+ if (ret) {
+ dev_err(info->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+ /* Initialize RT8973A device and print vendor id and version id */
+ rt8973a_init_dev_type(info);
+
+ return 0;
+}
+
+static int rt8973a_muic_i2c_remove(struct i2c_client *i2c)
+{
+ struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+ regmap_del_irq_chip(info->irq, info->irq_data);
+
+ return 0;
+}
+
+static const struct of_device_id rt8973a_dt_match[] = {
+ { .compatible = "richtek,rt8973a-muic" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int rt8973a_muic_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+ enable_irq_wake(info->irq);
+
+ return 0;
+}
+
+static int rt8973a_muic_resume(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+ disable_irq_wake(info->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
+ rt8973a_muic_suspend, rt8973a_muic_resume);
+
+static const struct i2c_device_id rt8973a_i2c_id[] = {
+ { "rt8973a", TYPE_RT8973A },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
+
+static struct i2c_driver rt8973a_muic_i2c_driver = {
+ .driver = {
+ .name = "rt8973a",
+ .pm = &rt8973a_muic_pm_ops,
+ .of_match_table = rt8973a_dt_match,
+ },
+ .probe = rt8973a_muic_i2c_probe,
+ .remove = rt8973a_muic_i2c_remove,
+ .id_table = rt8973a_i2c_id,
+};
+
+static int __init rt8973a_muic_i2c_init(void)
+{
+ return i2c_add_driver(&rt8973a_muic_i2c_driver);
+}
+subsys_initcall(rt8973a_muic_i2c_init);
+
+MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-rt8973a.h b/drivers/extcon/extcon-rt8973a.h
new file mode 100644
index 0000000..9dc3e02
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.h
@@ -0,0 +1,203 @@
+/*
+ * rt8973a.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __LINUX_EXTCON_RT8973A_H
+#define __LINUX_EXTCON_RT8973A_H
+
+enum rt8973a_types {
+ TYPE_RT8973A,
+};
+
+/* RT8973A registers */
+enum rt8973A_reg {
+ RT8973A_REG_DEVICE_ID = 0x1,
+ RT8973A_REG_CONTROL1,
+ RT8973A_REG_INT1,
+ RT8973A_REG_INT2,
+ RT8973A_REG_INTM1,
+ RT8973A_REG_INTM2,
+ RT8973A_REG_ADC,
+ RT8973A_REG_RSVD_1,
+ RT8973A_REG_RSVD_2,
+ RT8973A_REG_DEV1,
+ RT8973A_REG_DEV2,
+ RT8973A_REG_RSVD_3,
+ RT8973A_REG_RSVD_4,
+ RT8973A_REG_RSVD_5,
+ RT8973A_REG_RSVD_6,
+ RT8973A_REG_RSVD_7,
+ RT8973A_REG_RSVD_8,
+ RT8973A_REG_RSVD_9,
+ RT8973A_REG_MANUAL_SW1,
+ RT8973A_REG_MANUAL_SW2,
+ RT8973A_REG_RSVD_10,
+ RT8973A_REG_RSVD_11,
+ RT8973A_REG_RSVD_12,
+ RT8973A_REG_RSVD_13,
+ RT8973A_REG_RSVD_14,
+ RT8973A_REG_RSVD_15,
+ RT8973A_REG_RESET,
+
+ RT8973A_REG_END,
+};
+
+/* Define RT8973A MASK/SHIFT constant */
+#define RT8973A_REG_DEVICE_ID_VENDOR_SHIFT 0
+#define RT8973A_REG_DEVICE_ID_VERSION_SHIFT 3
+#define RT8973A_REG_DEVICE_ID_VENDOR_MASK (0x7 << RT8973A_REG_DEVICE_ID_VENDOR_SHIFT)
+#define RT8973A_REG_DEVICE_ID_VERSION_MASK (0x1f << RT8973A_REG_DEVICE_ID_VERSION_SHIFT)
+
+#define RT8973A_REG_CONTROL1_INTM_SHIFT 0
+#define RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT 2
+#define RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT 3
+#define RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT 4
+#define RT8973A_REG_CONTROL1_CHGTYP_SHIFT 5
+#define RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT 6
+#define RT8973A_REG_CONTROL1_ADC_EN_SHIFT 7
+#define RT8973A_REG_CONTROL1_INTM_MASK (0x1 << RT8973A_REG_CONTROL1_INTM_SHIFT)
+#define RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK (0x1 << RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT)
+#define RT8973A_REG_CONTROL1_I2C_RST_EN_MASK (0x1 << RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT)
+#define RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK (0x1 << RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT)
+#define RT8973A_REG_CONTROL1_CHGTYP_MASK (0x1 << RT8973A_REG_CONTROL1_CHGTYP_SHIFT)
+#define RT8973A_REG_CONTROL1_USB_CHD_EN_MASK (0x1 << RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT)
+#define RT8973A_REG_CONTROL1_ADC_EN_MASK (0x1 << RT8973A_REG_CONTROL1_ADC_EN_SHIFT)
+
+#define RT9873A_REG_INTM1_ATTACH_SHIFT 0
+#define RT9873A_REG_INTM1_DETACH_SHIFT 1
+#define RT9873A_REG_INTM1_CHGDET_SHIFT 2
+#define RT9873A_REG_INTM1_DCD_T_SHIFT 3
+#define RT9873A_REG_INTM1_OVP_SHIFT 4
+#define RT9873A_REG_INTM1_CONNECT_SHIFT 5
+#define RT9873A_REG_INTM1_ADC_CHG_SHIFT 6
+#define RT9873A_REG_INTM1_OTP_SHIFT 7
+#define RT9873A_REG_INTM1_ATTACH_MASK (0x1 << RT9873A_REG_INTM1_ATTACH_SHIFT)
+#define RT9873A_REG_INTM1_DETACH_MASK (0x1 << RT9873A_REG_INTM1_DETACH_SHIFT)
+#define RT9873A_REG_INTM1_CHGDET_MASK (0x1 << RT9873A_REG_INTM1_CHGDET_SHIFT)
+#define RT9873A_REG_INTM1_DCD_T_MASK (0x1 << RT9873A_REG_INTM1_DCD_T_SHIFT)
+#define RT9873A_REG_INTM1_OVP_MASK (0x1 << RT9873A_REG_INTM1_OVP_SHIFT)
+#define RT9873A_REG_INTM1_CONNECT_MASK (0x1 << RT9873A_REG_INTM1_CONNECT_SHIFT)
+#define RT9873A_REG_INTM1_ADC_CHG_MASK (0x1 << RT9873A_REG_INTM1_ADC_CHG_SHIFT)
+#define RT9873A_REG_INTM1_OTP_MASK (0x1 << RT9873A_REG_INTM1_OTP_SHIFT)
+
+#define RT9873A_REG_INTM2_UVLO_SHIFT 1
+#define RT9873A_REG_INTM2_POR_SHIFT 2
+#define RT9873A_REG_INTM2_OTP_FET_SHIFT 3
+#define RT9873A_REG_INTM2_OVP_FET_SHIFT 4
+#define RT9873A_REG_INTM2_OCP_LATCH_SHIFT 5
+#define RT9873A_REG_INTM2_OCP_SHIFT 6
+#define RT9873A_REG_INTM2_OVP_OCP_SHIFT 7
+#define RT9873A_REG_INTM2_UVLO_MASK (0x1 << RT9873A_REG_INTM2_UVLO_SHIFT)
+#define RT9873A_REG_INTM2_POR_MASK (0x1 << RT9873A_REG_INTM2_POR_SHIFT)
+#define RT9873A_REG_INTM2_OTP_FET_MASK (0x1 << RT9873A_REG_INTM2_OTP_FET_SHIFT)
+#define RT9873A_REG_INTM2_OVP_FET_MASK (0x1 << RT9873A_REG_INTM2_OVP_FET_SHIFT)
+#define RT9873A_REG_INTM2_OCP_LATCH_MASK (0x1 << RT9873A_REG_INTM2_OCP_LATCH_SHIFT)
+#define RT9873A_REG_INTM2_OCP_MASK (0x1 << RT9873A_REG_INTM2_OCP_SHIFT)
+#define RT9873A_REG_INTM2_OVP_OCP_MASK (0x1 << RT9873A_REG_INTM2_OVP_OCP_SHIFT)
+
+#define RT8973A_REG_ADC_SHIFT 0
+#define RT8973A_REG_ADC_MASK (0x1f << RT8973A_REG_ADC_SHIFT)
+
+#define RT8973A_REG_DEV1_OTG_SHIFT 0
+#define RT8973A_REG_DEV1_SDP_SHIFT 2
+#define RT8973A_REG_DEV1_UART_SHIFT 3
+#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT 4
+#define RT8973A_REG_DEV1_CDPORT_SHIFT 5
+#define RT8973A_REG_DEV1_DCPORT_SHIFT 6
+#define RT8973A_REG_DEV1_OTG_MASK (0x1 << RT8973A_REG_DEV1_OTG_SHIFT)
+#define RT8973A_REG_DEV1_SDP_MASK (0x1 << RT8973A_REG_DEV1_SDP_SHIFT)
+#define RT8973A_REG_DEV1_UART_MASK (0x1 << RT8973A_REG_DEV1_UART_SHIFT)
+#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_MASK (0x1 << RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT)
+#define RT8973A_REG_DEV1_CDPORT_MASK (0x1 << RT8973A_REG_DEV1_CDPORT_SHIFT)
+#define RT8973A_REG_DEV1_DCPORT_MASK (0x1 << RT8973A_REG_DEV1_DCPORT_SHIFT)
+#define RT8973A_REG_DEV1_USB_MASK (RT8973A_REG_DEV1_SDP_MASK \
+ | RT8973A_REG_DEV1_CDPORT_MASK)
+
+#define RT8973A_REG_DEV2_JIG_USB_ON_SHIFT 0
+#define RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT 1
+#define RT8973A_REG_DEV2_JIG_UART_ON_SHIFT 2
+#define RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT 3
+#define RT8973A_REG_DEV2_JIG_USB_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_ON_SHIFT)
+#define RT8973A_REG_DEV2_JIG_USB_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT)
+#define RT8973A_REG_DEV2_JIG_UART_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_ON_SHIFT)
+#define RT8973A_REG_DEV2_JIG_UART_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT)
+
+#define RT8973A_REG_MANUAL_SW1_DP_SHIFT 2
+#define RT8973A_REG_MANUAL_SW1_DM_SHIFT 5
+#define RT8973A_REG_MANUAL_SW1_DP_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DP_SHIFT)
+#define RT8973A_REG_MANUAL_SW1_DM_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DM_SHIFT)
+#define DM_DP_CON_SWITCH_OPEN 0x0
+#define DM_DP_CON_SWITCH_USB 0x1
+#define DM_DP_CON_SWITCH_UART 0x3
+#define DM_DP_SWITCH_OPEN ((DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
+#define DM_DP_SWITCH_USB ((DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
+#define DM_DP_SWITCH_UART ((DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
+
+#define RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT 0
+#define RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT 2
+#define RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT 3
+#define RT8973A_REG_MANUAL_SW2_FET_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT)
+#define RT8973A_REG_MANUAL_SW2_JIG_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT)
+#define RT8973A_REG_MANUAL_SW2_BOOT_SW_MASK (0x1 << RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT)
+#define RT8973A_REG_MANUAL_SW2_FET_ON 0
+#define RT8973A_REG_MANUAL_SW2_FET_OFF 0x1
+#define RT8973A_REG_MANUAL_SW2_JIG_OFF 0
+#define RT8973A_REG_MANUAL_SW2_JIG_ON 0x1
+#define RT8973A_REG_MANUAL_SW2_BOOT_SW_ON 0
+#define RT8973A_REG_MANUAL_SW2_BOOT_SW_OFF 0x1
+
+#define RT8973A_REG_RESET_SHIFT 0
+#define RT8973A_REG_RESET_MASK (0x1 << RT8973A_REG_RESET_SHIFT)
+#define RT8973A_REG_RESET 0x1
+
+/* RT8973A Interrupts */
+enum rt8973a_irq {
+ /* Interrupt1*/
+ RT8973A_INT1_ATTACH,
+ RT8973A_INT1_DETACH,
+ RT8973A_INT1_CHGDET,
+ RT8973A_INT1_DCD_T,
+ RT8973A_INT1_OVP,
+ RT8973A_INT1_CONNECT,
+ RT8973A_INT1_ADC_CHG,
+ RT8973A_INT1_OTP,
+
+ /* Interrupt2*/
+ RT8973A_INT2_UVLO,
+ RT8973A_INT2_POR,
+ RT8973A_INT2_OTP_FET,
+ RT8973A_INT2_OVP_FET,
+ RT8973A_INT2_OCP_LATCH,
+ RT8973A_INT2_OCP,
+ RT8973A_INT2_OVP_OCP,
+
+ RT8973A_NUM,
+};
+
+#define RT8973A_INT1_ATTACH_MASK BIT(0)
+#define RT8973A_INT1_DETACH_MASK BIT(1)
+#define RT8973A_INT1_CHGDET_MASK BIT(2)
+#define RT8973A_INT1_DCD_T_MASK BIT(3)
+#define RT8973A_INT1_OVP_MASK BIT(4)
+#define RT8973A_INT1_CONNECT_MASK BIT(5)
+#define RT8973A_INT1_ADC_CHG_MASK BIT(6)
+#define RT8973A_INT1_OTP_MASK BIT(7)
+#define RT8973A_INT2_UVLOT_MASK BIT(0)
+#define RT8973A_INT2_POR_MASK BIT(1)
+#define RT8973A_INT2_OTP_FET_MASK BIT(2)
+#define RT8973A_INT2_OVP_FET_MASK BIT(3)
+#define RT8973A_INT2_OCP_LATCH_MASK BIT(4)
+#define RT8973A_INT2_OCP_MASK BIT(5)
+#define RT8973A_INT2_OVP_OCP_MASK BIT(6)
+
+#endif /* __LINUX_EXTCON_RT8973A_H */
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644
index 0000000..0cfb5a3
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.c
@@ -0,0 +1,711 @@
+/*
+ * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon-provider.h>
+
+#include "extcon-sm5502.h"
+
+#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
+
+struct muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+struct reg_data {
+ u8 reg;
+ unsigned int val;
+ bool invert;
+};
+
+struct sm5502_muic_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+
+ struct regmap_irq_chip_data *irq_data;
+ struct muic_irq *muic_irqs;
+ unsigned int num_muic_irqs;
+ int irq;
+ bool irq_attach;
+ bool irq_detach;
+ struct work_struct irq_work;
+
+ struct reg_data *reg_data;
+ unsigned int num_reg_data;
+
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+};
+
+/* Default value of SM5502 register to bring up MUIC device. */
+static struct reg_data sm5502_reg_data[] = {
+ {
+ .reg = SM5502_REG_CONTROL,
+ .val = SM5502_REG_CONTROL_MASK_INT_MASK,
+ .invert = false,
+ }, {
+ .reg = SM5502_REG_INTMASK1,
+ .val = SM5502_REG_INTM1_KP_MASK
+ | SM5502_REG_INTM1_LKP_MASK
+ | SM5502_REG_INTM1_LKR_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_INTMASK2,
+ .val = SM5502_REG_INTM2_VBUS_DET_MASK
+ | SM5502_REG_INTM2_REV_ACCE_MASK
+ | SM5502_REG_INTM2_ADC_CHG_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
+ | SM5502_REG_INTM2_MHL_MASK,
+ .invert = true,
+ },
+ { }
+};
+
+/* List of detectable cables */
+static const unsigned int sm5502_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_NONE,
+};
+
+/* Define supported accessory type */
+enum sm5502_muic_acc_type {
+ SM5502_MUIC_ADC_GROUND = 0x0,
+ SM5502_MUIC_ADC_SEND_END_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
+ SM5502_MUIC_ADC_RESERVED_ACC_1,
+ SM5502_MUIC_ADC_RESERVED_ACC_2,
+ SM5502_MUIC_ADC_RESERVED_ACC_3,
+ SM5502_MUIC_ADC_RESERVED_ACC_4,
+ SM5502_MUIC_ADC_RESERVED_ACC_5,
+ SM5502_MUIC_ADC_AUDIO_TYPE2,
+ SM5502_MUIC_ADC_PHONE_POWERED_DEV,
+ SM5502_MUIC_ADC_TTY_CONVERTER,
+ SM5502_MUIC_ADC_UART_CABLE,
+ SM5502_MUIC_ADC_TYPE1_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+ SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
+ SM5502_MUIC_ADC_TYPE2_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+ SM5502_MUIC_ADC_AUDIO_TYPE1,
+ SM5502_MUIC_ADC_OPEN = 0x1f,
+
+ /*
+ * The below accessories have same ADC value (0x1f or 0x1e).
+ * So, Device type1 is used to separate specific accessory.
+ */
+ /* |---------|--ADC| */
+ /* | [7:5]|[4:0]| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
+ /* |Dev Type1|--ADC| */
+ SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
+ SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
+ SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
+};
+
+/* List of supported interrupt for SM5502 */
+static struct muic_irq sm5502_muic_irqs[] = {
+ { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
+ { SM5502_IRQ_INT1_DETACH, "muic-detach" },
+ { SM5502_IRQ_INT1_KP, "muic-kp" },
+ { SM5502_IRQ_INT1_LKP, "muic-lkp" },
+ { SM5502_IRQ_INT1_LKR, "muic-lkr" },
+ { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
+ { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
+ { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
+ { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
+ { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
+ { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
+ { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
+ { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
+ { SM5502_IRQ_INT2_MHL, "muic-mhl" },
+};
+
+/* Define interrupt list of SM5502 to register regmap_irq */
+static const struct regmap_irq sm5502_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
+
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
+};
+
+static const struct regmap_irq_chip sm5502_muic_irq_chip = {
+ .name = "sm5502",
+ .status_base = SM5502_REG_INT1,
+ .mask_base = SM5502_REG_INTMASK1,
+ .mask_invert = false,
+ .num_regs = 2,
+ .irqs = sm5502_irqs,
+ .num_irqs = ARRAY_SIZE(sm5502_irqs),
+};
+
+/* Define regmap configuration of SM5502 for I2C communication */
+static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SM5502_REG_INTMASK1:
+ case SM5502_REG_INTMASK2:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+static const struct regmap_config sm5502_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = sm5502_muic_volatile_reg,
+ .max_register = SM5502_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int sm5502_muic_set_path(struct sm5502_muic_info *info,
+ unsigned int con_sw, unsigned int vbus_sw,
+ bool attached)
+{
+ int ret;
+
+ if (!attached) {
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ }
+
+ switch (con_sw) {
+ case DM_DP_SWITCH_OPEN:
+ case DM_DP_SWITCH_USB:
+ case DM_DP_SWITCH_AUDIO:
+ case DM_DP_SWITCH_UART:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_DP_MASK |
+ SM5502_REG_MANUAL_SW1_DM_MASK,
+ con_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update DM_CON/DP_CON switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+ con_sw);
+ return -EINVAL;
+ };
+
+ switch (vbus_sw) {
+ case VBUSIN_SWITCH_OPEN:
+ case VBUSIN_SWITCH_VBUSOUT:
+ case VBUSIN_SWITCH_MIC:
+ case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
+ vbus_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update VBUSIN switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+/* Return cable type of attached or detached accessories */
+static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
+{
+ unsigned int cable_type = -1, adc, dev_type1;
+ int ret;
+
+ /* Read ADC value according to external cable or button */
+ ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
+ if (ret) {
+ dev_err(info->dev, "failed to read ADC register\n");
+ return ret;
+ }
+
+ /*
+ * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
+ * connected with to MUIC device.
+ */
+ cable_type = adc & SM5502_REG_ADC_MASK;
+ if (cable_type == SM5502_MUIC_ADC_GROUND)
+ return SM5502_MUIC_ADC_GROUND;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_GROUND:
+ case SM5502_MUIC_ADC_SEND_END_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
+ case SM5502_MUIC_ADC_RESERVED_ACC_1:
+ case SM5502_MUIC_ADC_RESERVED_ACC_2:
+ case SM5502_MUIC_ADC_RESERVED_ACC_3:
+ case SM5502_MUIC_ADC_RESERVED_ACC_4:
+ case SM5502_MUIC_ADC_RESERVED_ACC_5:
+ case SM5502_MUIC_ADC_AUDIO_TYPE2:
+ case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
+ case SM5502_MUIC_ADC_TTY_CONVERTER:
+ case SM5502_MUIC_ADC_UART_CABLE:
+ case SM5502_MUIC_ADC_TYPE1_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+ case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
+ case SM5502_MUIC_ADC_TYPE2_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+ break;
+ case SM5502_MUIC_ADC_AUDIO_TYPE1:
+ /*
+ * Check whether cable type is
+ * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
+ * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
+ * by using Button event.
+ */
+ break;
+ case SM5502_MUIC_ADC_OPEN:
+ ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
+ &dev_type1);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
+ return ret;
+ }
+
+ switch (dev_type1) {
+ case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_USB;
+ break;
+ case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_TA;
+ break;
+ case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot identify the cable type: adc(0x%x)\n",
+ adc);
+ return -EINVAL;
+ };
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to identify the cable type: adc(0x%x)\n", adc);
+ return -EINVAL;
+ };
+
+ return cable_type;
+}
+
+static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
+ bool attached)
+{
+ static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
+ unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
+ unsigned int con_sw = DM_DP_SWITCH_OPEN;
+ unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
+ unsigned int id;
+ int ret;
+
+ /* Get the type of attached or detached cable */
+ if (attached)
+ cable_type = sm5502_muic_get_cable_type(info);
+ else
+ cable_type = prev_cable_type;
+ prev_cable_type = cable_type;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_OPEN_USB:
+ id = EXTCON_USB;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
+ break;
+ case SM5502_MUIC_ADC_OPEN_TA:
+ id = EXTCON_CHG_USB_DCP;
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT;
+ break;
+ case SM5502_MUIC_ADC_OPEN_USB_OTG:
+ id = EXTCON_USB_HOST;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot handle this cable_type (0x%x)\n", cable_type);
+ return 0;
+ };
+
+ /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
+ ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
+ if (ret < 0)
+ return ret;
+
+ /* Change the state of external accessory */
+ extcon_set_state_sync(info->edev, id, attached);
+ if (id == EXTCON_USB)
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+
+ return 0;
+}
+
+static void sm5502_muic_irq_work(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(work,
+ struct sm5502_muic_info, irq_work);
+ int ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ /* Detect attached or detached cables */
+ if (info->irq_attach) {
+ ret = sm5502_muic_cable_handler(info, true);
+ info->irq_attach = false;
+ }
+ if (info->irq_detach) {
+ ret = sm5502_muic_cable_handler(info, false);
+ info->irq_detach = false;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+/*
+ * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
+ * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
+ */
+static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
+{
+ switch (irq_type) {
+ case SM5502_IRQ_INT1_ATTACH:
+ info->irq_attach = true;
+ break;
+ case SM5502_IRQ_INT1_DETACH:
+ info->irq_detach = true;
+ break;
+ case SM5502_IRQ_INT1_KP:
+ case SM5502_IRQ_INT1_LKP:
+ case SM5502_IRQ_INT1_LKR:
+ case SM5502_IRQ_INT1_OVP_EVENT:
+ case SM5502_IRQ_INT1_OCP_EVENT:
+ case SM5502_IRQ_INT1_OVP_OCP_DIS:
+ case SM5502_IRQ_INT2_VBUS_DET:
+ case SM5502_IRQ_INT2_REV_ACCE:
+ case SM5502_IRQ_INT2_ADC_CHG:
+ case SM5502_IRQ_INT2_STUCK_KEY:
+ case SM5502_IRQ_INT2_STUCK_KEY_RCV:
+ case SM5502_IRQ_INT2_MHL:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
+{
+ struct sm5502_muic_info *info = data;
+ int i, irq_type = -1, ret;
+
+ for (i = 0; i < info->num_muic_irqs; i++)
+ if (irq == info->muic_irqs[i].virq)
+ irq_type = info->muic_irqs[i].irq;
+
+ ret = sm5502_parse_irq(info, irq_type);
+ if (ret < 0) {
+ dev_warn(info->dev, "cannot handle is interrupt:%d\n",
+ irq_type);
+ return IRQ_HANDLED;
+ }
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void sm5502_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(to_delayed_work(work),
+ struct sm5502_muic_info, wq_detcable);
+ int ret;
+
+ /* Notify the state of connector cable or not */
+ ret = sm5502_muic_cable_handler(info, true);
+ if (ret < 0)
+ dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void sm5502_init_dev_type(struct sm5502_muic_info *info)
+{
+ unsigned int reg_data, vendor_id, version_id;
+ int i, ret;
+
+ /* To test I2C, Print version_id and vendor_id of SM5502 */
+ ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read DEVICE_ID register: %d\n", ret);
+ return;
+ }
+
+ vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
+ SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
+ version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
+ SM5502_REG_DEVICE_ID_VERSION_SHIFT);
+
+ dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+ version_id, vendor_id);
+
+ /* Initiazle the register of SM5502 device to bring-up */
+ for (i = 0; i < info->num_reg_data; i++) {
+ unsigned int val = 0;
+
+ if (!info->reg_data[i].invert)
+ val |= ~info->reg_data[i].val;
+ else
+ val = info->reg_data[i].val;
+ regmap_write(info->regmap, info->reg_data[i].reg, val);
+ }
+}
+
+static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct device_node *np = i2c->dev.of_node;
+ struct sm5502_muic_info *info;
+ int i, ret, irq_flags;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i2c_set_clientdata(i2c, info);
+
+ info->dev = &i2c->dev;
+ info->i2c = i2c;
+ info->irq = i2c->irq;
+ info->muic_irqs = sm5502_muic_irqs;
+ info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
+ info->reg_data = sm5502_reg_data;
+ info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
+
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
+
+ info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(info->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Support irq domain for SM5502 MUIC device */
+ irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+ ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+ &sm5502_muic_irq_chip, &info->irq_data);
+ if (ret != 0) {
+ dev_err(info->dev, "failed to request IRQ %d: %d\n",
+ info->irq, ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->num_muic_irqs; i++) {
+ struct muic_irq *muic_irq = &info->muic_irqs[i];
+ int virq = 0;
+
+ virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(info->dev, virq, NULL,
+ sm5502_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(info->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Allocate extcon device */
+ info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(info->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(info->dev, info->edev);
+ if (ret) {
+ dev_err(info->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+ /* Initialize SM5502 device and print vendor id and version id */
+ sm5502_init_dev_type(info);
+
+ return 0;
+}
+
+static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
+{
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ regmap_del_irq_chip(info->irq, info->irq_data);
+
+ return 0;
+}
+
+static const struct of_device_id sm5502_dt_match[] = {
+ { .compatible = "siliconmitus,sm5502-muic" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sm5502_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int sm5502_muic_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ enable_irq_wake(info->irq);
+
+ return 0;
+}
+
+static int sm5502_muic_resume(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ disable_irq_wake(info->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
+ sm5502_muic_suspend, sm5502_muic_resume);
+
+static const struct i2c_device_id sm5502_i2c_id[] = {
+ { "sm5502", TYPE_SM5502 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
+
+static struct i2c_driver sm5502_muic_i2c_driver = {
+ .driver = {
+ .name = "sm5502",
+ .pm = &sm5502_muic_pm_ops,
+ .of_match_table = sm5502_dt_match,
+ },
+ .probe = sm5022_muic_i2c_probe,
+ .remove = sm5502_muic_i2c_remove,
+ .id_table = sm5502_i2c_id,
+};
+
+static int __init sm5502_muic_i2c_init(void)
+{
+ return i2c_add_driver(&sm5502_muic_i2c_driver);
+}
+subsys_initcall(sm5502_muic_i2c_init);
+
+MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-sm5502.h b/drivers/extcon/extcon-sm5502.h
new file mode 100644
index 0000000..974b532
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.h
@@ -0,0 +1,282 @@
+/*
+ * sm5502.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __LINUX_EXTCON_SM5502_H
+#define __LINUX_EXTCON_SM5502_H
+
+enum sm5502_types {
+ TYPE_SM5502,
+};
+
+/* SM5502 registers */
+enum sm5502_reg {
+ SM5502_REG_DEVICE_ID = 0x01,
+ SM5502_REG_CONTROL,
+ SM5502_REG_INT1,
+ SM5502_REG_INT2,
+ SM5502_REG_INTMASK1,
+ SM5502_REG_INTMASK2,
+ SM5502_REG_ADC,
+ SM5502_REG_TIMING_SET1,
+ SM5502_REG_TIMING_SET2,
+ SM5502_REG_DEV_TYPE1,
+ SM5502_REG_DEV_TYPE2,
+ SM5502_REG_BUTTON1,
+ SM5502_REG_BUTTON2,
+ SM5502_REG_CAR_KIT_STATUS,
+ SM5502_REG_RSVD1,
+ SM5502_REG_RSVD2,
+ SM5502_REG_RSVD3,
+ SM5502_REG_RSVD4,
+ SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW2,
+ SM5502_REG_DEV_TYPE3,
+ SM5502_REG_RSVD5,
+ SM5502_REG_RSVD6,
+ SM5502_REG_RSVD7,
+ SM5502_REG_RSVD8,
+ SM5502_REG_RSVD9,
+ SM5502_REG_RESET,
+ SM5502_REG_RSVD10,
+ SM5502_REG_RESERVED_ID1,
+ SM5502_REG_RSVD11,
+ SM5502_REG_RSVD12,
+ SM5502_REG_RESERVED_ID2,
+ SM5502_REG_RSVD13,
+ SM5502_REG_OCP,
+ SM5502_REG_RSVD14,
+ SM5502_REG_RSVD15,
+ SM5502_REG_RSVD16,
+ SM5502_REG_RSVD17,
+ SM5502_REG_RSVD18,
+ SM5502_REG_RSVD19,
+ SM5502_REG_RSVD20,
+ SM5502_REG_RSVD21,
+ SM5502_REG_RSVD22,
+ SM5502_REG_RSVD23,
+ SM5502_REG_RSVD24,
+ SM5502_REG_RSVD25,
+ SM5502_REG_RSVD26,
+ SM5502_REG_RSVD27,
+ SM5502_REG_RSVD28,
+ SM5502_REG_RSVD29,
+ SM5502_REG_RSVD30,
+ SM5502_REG_RSVD31,
+ SM5502_REG_RSVD32,
+ SM5502_REG_RSVD33,
+ SM5502_REG_RSVD34,
+ SM5502_REG_RSVD35,
+ SM5502_REG_RSVD36,
+ SM5502_REG_RESERVED_ID3,
+
+ SM5502_REG_END,
+};
+
+/* Define SM5502 MASK/SHIFT constant */
+#define SM5502_REG_DEVICE_ID_VENDOR_SHIFT 0
+#define SM5502_REG_DEVICE_ID_VERSION_SHIFT 3
+#define SM5502_REG_DEVICE_ID_VENDOR_MASK (0x3 << SM5502_REG_DEVICE_ID_VENDOR_SHIFT)
+#define SM5502_REG_DEVICE_ID_VERSION_MASK (0x1f << SM5502_REG_DEVICE_ID_VERSION_SHIFT)
+
+#define SM5502_REG_CONTROL_MASK_INT_SHIFT 0
+#define SM5502_REG_CONTROL_WAIT_SHIFT 1
+#define SM5502_REG_CONTROL_MANUAL_SW_SHIFT 2
+#define SM5502_REG_CONTROL_RAW_DATA_SHIFT 3
+#define SM5502_REG_CONTROL_SW_OPEN_SHIFT 4
+#define SM5502_REG_CONTROL_MASK_INT_MASK (0x1 << SM5502_REG_CONTROL_MASK_INT_SHIFT)
+#define SM5502_REG_CONTROL_WAIT_MASK (0x1 << SM5502_REG_CONTROL_WAIT_SHIFT)
+#define SM5502_REG_CONTROL_MANUAL_SW_MASK (0x1 << SM5502_REG_CONTROL_MANUAL_SW_SHIFT)
+#define SM5502_REG_CONTROL_RAW_DATA_MASK (0x1 << SM5502_REG_CONTROL_RAW_DATA_SHIFT)
+#define SM5502_REG_CONTROL_SW_OPEN_MASK (0x1 << SM5502_REG_CONTROL_SW_OPEN_SHIFT)
+
+#define SM5502_REG_INTM1_ATTACH_SHIFT 0
+#define SM5502_REG_INTM1_DETACH_SHIFT 1
+#define SM5502_REG_INTM1_KP_SHIFT 2
+#define SM5502_REG_INTM1_LKP_SHIFT 3
+#define SM5502_REG_INTM1_LKR_SHIFT 4
+#define SM5502_REG_INTM1_OVP_EVENT_SHIFT 5
+#define SM5502_REG_INTM1_OCP_EVENT_SHIFT 6
+#define SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT 7
+#define SM5502_REG_INTM1_ATTACH_MASK (0x1 << SM5502_REG_INTM1_ATTACH_SHIFT)
+#define SM5502_REG_INTM1_DETACH_MASK (0x1 << SM5502_REG_INTM1_DETACH_SHIFT)
+#define SM5502_REG_INTM1_KP_MASK (0x1 << SM5502_REG_INTM1_KP_SHIFT)
+#define SM5502_REG_INTM1_LKP_MASK (0x1 << SM5502_REG_INTM1_LKP_SHIFT)
+#define SM5502_REG_INTM1_LKR_MASK (0x1 << SM5502_REG_INTM1_LKR_SHIFT)
+#define SM5502_REG_INTM1_OVP_EVENT_MASK (0x1 << SM5502_REG_INTM1_OVP_EVENT_SHIFT)
+#define SM5502_REG_INTM1_OCP_EVENT_MASK (0x1 << SM5502_REG_INTM1_OCP_EVENT_SHIFT)
+#define SM5502_REG_INTM1_OVP_OCP_DIS_MASK (0x1 << SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT)
+
+#define SM5502_REG_INTM2_VBUS_DET_SHIFT 0
+#define SM5502_REG_INTM2_REV_ACCE_SHIFT 1
+#define SM5502_REG_INTM2_ADC_CHG_SHIFT 2
+#define SM5502_REG_INTM2_STUCK_KEY_SHIFT 3
+#define SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT 4
+#define SM5502_REG_INTM2_MHL_SHIFT 5
+#define SM5502_REG_INTM2_VBUS_DET_MASK (0x1 << SM5502_REG_INTM2_VBUS_DET_SHIFT)
+#define SM5502_REG_INTM2_REV_ACCE_MASK (0x1 << SM5502_REG_INTM2_REV_ACCE_SHIFT)
+#define SM5502_REG_INTM2_ADC_CHG_MASK (0x1 << SM5502_REG_INTM2_ADC_CHG_SHIFT)
+#define SM5502_REG_INTM2_STUCK_KEY_MASK (0x1 << SM5502_REG_INTM2_STUCK_KEY_SHIFT)
+#define SM5502_REG_INTM2_STUCK_KEY_RCV_MASK (0x1 << SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT)
+#define SM5502_REG_INTM2_MHL_MASK (0x1 << SM5502_REG_INTM2_MHL_SHIFT)
+
+#define SM5502_REG_ADC_SHIFT 0
+#define SM5502_REG_ADC_MASK (0x1f << SM5502_REG_ADC_SHIFT)
+
+#define SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT 4
+#define SM5502_REG_TIMING_SET1_KEY_PRESS_MASK (0xf << SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT)
+#define TIMING_KEY_PRESS_100MS 0x0
+#define TIMING_KEY_PRESS_200MS 0x1
+#define TIMING_KEY_PRESS_300MS 0x2
+#define TIMING_KEY_PRESS_400MS 0x3
+#define TIMING_KEY_PRESS_500MS 0x4
+#define TIMING_KEY_PRESS_600MS 0x5
+#define TIMING_KEY_PRESS_700MS 0x6
+#define TIMING_KEY_PRESS_800MS 0x7
+#define TIMING_KEY_PRESS_900MS 0x8
+#define TIMING_KEY_PRESS_1000MS 0x9
+#define SM5502_REG_TIMING_SET1_ADC_DET_SHIFT 0
+#define SM5502_REG_TIMING_SET1_ADC_DET_MASK (0xf << SM5502_REG_TIMING_SET1_ADC_DET_SHIFT)
+#define TIMING_ADC_DET_50MS 0x0
+#define TIMING_ADC_DET_100MS 0x1
+#define TIMING_ADC_DET_150MS 0x2
+#define TIMING_ADC_DET_200MS 0x3
+#define TIMING_ADC_DET_300MS 0x4
+#define TIMING_ADC_DET_400MS 0x5
+#define TIMING_ADC_DET_500MS 0x6
+#define TIMING_ADC_DET_600MS 0x7
+#define TIMING_ADC_DET_700MS 0x8
+#define TIMING_ADC_DET_800MS 0x9
+#define TIMING_ADC_DET_900MS 0xA
+#define TIMING_ADC_DET_1000MS 0xB
+
+#define SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT 4
+#define SM5502_REG_TIMING_SET2_SW_WAIT_MASK (0xf << SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT)
+#define TIMING_SW_WAIT_10MS 0x0
+#define TIMING_SW_WAIT_30MS 0x1
+#define TIMING_SW_WAIT_50MS 0x2
+#define TIMING_SW_WAIT_70MS 0x3
+#define TIMING_SW_WAIT_90MS 0x4
+#define TIMING_SW_WAIT_110MS 0x5
+#define TIMING_SW_WAIT_130MS 0x6
+#define TIMING_SW_WAIT_150MS 0x7
+#define TIMING_SW_WAIT_170MS 0x8
+#define TIMING_SW_WAIT_190MS 0x9
+#define TIMING_SW_WAIT_210MS 0xA
+#define SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT 0
+#define SM5502_REG_TIMING_SET2_LONG_KEY_MASK (0xf << SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT)
+#define TIMING_LONG_KEY_300MS 0x0
+#define TIMING_LONG_KEY_400MS 0x1
+#define TIMING_LONG_KEY_500MS 0x2
+#define TIMING_LONG_KEY_600MS 0x3
+#define TIMING_LONG_KEY_700MS 0x4
+#define TIMING_LONG_KEY_800MS 0x5
+#define TIMING_LONG_KEY_900MS 0x6
+#define TIMING_LONG_KEY_1000MS 0x7
+#define TIMING_LONG_KEY_1100MS 0x8
+#define TIMING_LONG_KEY_1200MS 0x9
+#define TIMING_LONG_KEY_1300MS 0xA
+#define TIMING_LONG_KEY_1400MS 0xB
+#define TIMING_LONG_KEY_1500MS 0xC
+
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT 0
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT 1
+#define SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT 2
+#define SM5502_REG_DEV_TYPE1_UART_SHIFT 3
+#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT 4
+#define SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT 5
+#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT 6
+#define SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT 7
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_MASK (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT)
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1__MASK (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_SDP_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT)
+#define SM5502_REG_DEV_TYPE1_UART_MASK (0x1 << SM5502_REG_DEV_TYPE1_UART_SHIFT)
+#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_MASK (0x1 << SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_CHG_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT)
+#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK (0x1 << SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_OTG_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT)
+
+#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT 0
+#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT 1
+#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT 2
+#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT 3
+#define SM5502_REG_DEV_TYPE2_PPD_SHIFT 4
+#define SM5502_REG_DEV_TYPE2_TTY_SHIFT 5
+#define SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT 6
+#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT)
+#define SM5502_REG_DEV_TYPE2_PPD_MASK (0x1 << SM5502_REG_DEV_TYPE2_PPD_SHIFT)
+#define SM5502_REG_DEV_TYPE2_TTY_MASK (0x1 << SM5502_REG_DEV_TYPE2_TTY_SHIFT)
+#define SM5502_REG_DEV_TYPE2_AV_CABLE_MASK (0x1 << SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT)
+
+#define SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT 0
+#define SM5502_REG_MANUAL_SW1_DP_SHIFT 2
+#define SM5502_REG_MANUAL_SW1_DM_SHIFT 5
+#define SM5502_REG_MANUAL_SW1_VBUSIN_MASK (0x3 << SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT)
+#define SM5502_REG_MANUAL_SW1_DP_MASK (0x7 << SM5502_REG_MANUAL_SW1_DP_SHIFT)
+#define SM5502_REG_MANUAL_SW1_DM_MASK (0x7 << SM5502_REG_MANUAL_SW1_DM_SHIFT)
+#define VBUSIN_SWITCH_OPEN 0x0
+#define VBUSIN_SWITCH_VBUSOUT 0x1
+#define VBUSIN_SWITCH_MIC 0x2
+#define VBUSIN_SWITCH_VBUSOUT_WITH_USB 0x3
+#define DM_DP_CON_SWITCH_OPEN 0x0
+#define DM_DP_CON_SWITCH_USB 0x1
+#define DM_DP_CON_SWITCH_AUDIO 0x2
+#define DM_DP_CON_SWITCH_UART 0x3
+#define DM_DP_SWITCH_OPEN ((DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DM_SHIFT))
+#define DM_DP_SWITCH_USB ((DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DM_SHIFT))
+#define DM_DP_SWITCH_AUDIO ((DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DM_SHIFT))
+#define DM_DP_SWITCH_UART ((DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \
+ | (DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DM_SHIFT))
+
+/* SM5502 Interrupts */
+enum sm5502_irq {
+ /* INT1 */
+ SM5502_IRQ_INT1_ATTACH,
+ SM5502_IRQ_INT1_DETACH,
+ SM5502_IRQ_INT1_KP,
+ SM5502_IRQ_INT1_LKP,
+ SM5502_IRQ_INT1_LKR,
+ SM5502_IRQ_INT1_OVP_EVENT,
+ SM5502_IRQ_INT1_OCP_EVENT,
+ SM5502_IRQ_INT1_OVP_OCP_DIS,
+
+ /* INT2 */
+ SM5502_IRQ_INT2_VBUS_DET,
+ SM5502_IRQ_INT2_REV_ACCE,
+ SM5502_IRQ_INT2_ADC_CHG,
+ SM5502_IRQ_INT2_STUCK_KEY,
+ SM5502_IRQ_INT2_STUCK_KEY_RCV,
+ SM5502_IRQ_INT2_MHL,
+
+ SM5502_IRQ_NUM,
+};
+
+#define SM5502_IRQ_INT1_ATTACH_MASK BIT(0)
+#define SM5502_IRQ_INT1_DETACH_MASK BIT(1)
+#define SM5502_IRQ_INT1_KP_MASK BIT(2)
+#define SM5502_IRQ_INT1_LKP_MASK BIT(3)
+#define SM5502_IRQ_INT1_LKR_MASK BIT(4)
+#define SM5502_IRQ_INT1_OVP_EVENT_MASK BIT(5)
+#define SM5502_IRQ_INT1_OCP_EVENT_MASK BIT(6)
+#define SM5502_IRQ_INT1_OVP_OCP_DIS_MASK BIT(7)
+#define SM5502_IRQ_INT2_VBUS_DET_MASK BIT(0)
+#define SM5502_IRQ_INT2_REV_ACCE_MASK BIT(1)
+#define SM5502_IRQ_INT2_ADC_CHG_MASK BIT(2)
+#define SM5502_IRQ_INT2_STUCK_KEY_MASK BIT(3)
+#define SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK BIT(4)
+#define SM5502_IRQ_INT2_MHL_MASK BIT(5)
+
+#endif /* __LINUX_EXTCON_SM5502_H */
diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
new file mode 100644
index 0000000..5376286
--- /dev/null
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -0,0 +1,321 @@
+/**
+ * drivers/extcon/extcon-usb-gpio.c - USB GPIO extcon driver
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Roger Quadros <rogerq@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/pinctrl/consumer.h>
+
+#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
+
+struct usb_extcon_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ struct gpio_desc *id_gpiod;
+ struct gpio_desc *vbus_gpiod;
+ int id_irq;
+ int vbus_irq;
+
+ unsigned long debounce_jiffies;
+ struct delayed_work wq_detcable;
+};
+
+static const unsigned int usb_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+/*
+ * "USB" = VBUS and "USB-HOST" = !ID, so we have:
+ * Both "USB" and "USB-HOST" can't be set as active at the
+ * same time so if "USB-HOST" is active (i.e. ID is 0) we keep "USB" inactive
+ * even if VBUS is on.
+ *
+ * State | ID | VBUS
+ * ----------------------------------------
+ * [1] USB | H | H
+ * [2] none | H | L
+ * [3] USB-HOST | L | H
+ * [4] USB-HOST | L | L
+ *
+ * In case we have only one of these signals:
+ * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1.
+ * - ID only - we want to distinguish between [1] and [4], so VBUS = ID.
+*/
+static void usb_extcon_detect_cable(struct work_struct *work)
+{
+ int id, vbus;
+ struct usb_extcon_info *info = container_of(to_delayed_work(work),
+ struct usb_extcon_info,
+ wq_detcable);
+
+ /* check ID and VBUS and update cable state */
+ id = info->id_gpiod ?
+ gpiod_get_value_cansleep(info->id_gpiod) : 1;
+ vbus = info->vbus_gpiod ?
+ gpiod_get_value_cansleep(info->vbus_gpiod) : id;
+
+ /* at first we clean states which are no longer active */
+ if (id)
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false);
+ if (!vbus)
+ extcon_set_state_sync(info->edev, EXTCON_USB, false);
+
+ if (!id) {
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, true);
+ } else {
+ if (vbus)
+ extcon_set_state_sync(info->edev, EXTCON_USB, true);
+ }
+}
+
+static irqreturn_t usb_irq_handler(int irq, void *dev_id)
+{
+ struct usb_extcon_info *info = dev_id;
+
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ info->debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
+static int usb_extcon_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct usb_extcon_info *info;
+ int ret;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = dev;
+ info->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id", GPIOD_IN);
+ info->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus",
+ GPIOD_IN);
+
+ if (!info->id_gpiod && !info->vbus_gpiod) {
+ dev_err(dev, "failed to get gpios\n");
+ return -ENODEV;
+ }
+
+ if (IS_ERR(info->id_gpiod))
+ return PTR_ERR(info->id_gpiod);
+
+ if (IS_ERR(info->vbus_gpiod))
+ return PTR_ERR(info->vbus_gpiod);
+
+ info->edev = devm_extcon_dev_allocate(dev, usb_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(dev, info->edev);
+ if (ret < 0) {
+ dev_err(dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ if (info->id_gpiod)
+ ret = gpiod_set_debounce(info->id_gpiod,
+ USB_GPIO_DEBOUNCE_MS * 1000);
+ if (!ret && info->vbus_gpiod)
+ ret = gpiod_set_debounce(info->vbus_gpiod,
+ USB_GPIO_DEBOUNCE_MS * 1000);
+
+ if (ret < 0)
+ info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEBOUNCE_MS);
+
+ INIT_DELAYED_WORK(&info->wq_detcable, usb_extcon_detect_cable);
+
+ if (info->id_gpiod) {
+ info->id_irq = gpiod_to_irq(info->id_gpiod);
+ if (info->id_irq < 0) {
+ dev_err(dev, "failed to get ID IRQ\n");
+ return info->id_irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
+ usb_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request handler for ID IRQ\n");
+ return ret;
+ }
+ }
+
+ if (info->vbus_gpiod) {
+ info->vbus_irq = gpiod_to_irq(info->vbus_gpiod);
+ if (info->vbus_irq < 0) {
+ dev_err(dev, "failed to get VBUS IRQ\n");
+ return info->vbus_irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
+ usb_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request handler for VBUS IRQ\n");
+ return ret;
+ }
+ }
+
+ platform_set_drvdata(pdev, info);
+ device_set_wakeup_capable(&pdev->dev, true);
+
+ /* Perform initial detection */
+ usb_extcon_detect_cable(&info->wq_detcable.work);
+
+ return 0;
+}
+
+static int usb_extcon_remove(struct platform_device *pdev)
+{
+ struct usb_extcon_info *info = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&info->wq_detcable);
+ device_init_wakeup(&pdev->dev, false);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int usb_extcon_suspend(struct device *dev)
+{
+ struct usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (device_may_wakeup(dev)) {
+ if (info->id_gpiod) {
+ ret = enable_irq_wake(info->id_irq);
+ if (ret)
+ return ret;
+ }
+ if (info->vbus_gpiod) {
+ ret = enable_irq_wake(info->vbus_irq);
+ if (ret) {
+ if (info->id_gpiod)
+ disable_irq_wake(info->id_irq);
+
+ return ret;
+ }
+ }
+ }
+
+ /*
+ * We don't want to process any IRQs after this point
+ * as GPIOs used behind I2C subsystem might not be
+ * accessible until resume completes. So disable IRQ.
+ */
+ if (info->id_gpiod)
+ disable_irq(info->id_irq);
+ if (info->vbus_gpiod)
+ disable_irq(info->vbus_irq);
+
+ if (!device_may_wakeup(dev))
+ pinctrl_pm_select_sleep_state(dev);
+
+ return ret;
+}
+
+static int usb_extcon_resume(struct device *dev)
+{
+ struct usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (!device_may_wakeup(dev))
+ pinctrl_pm_select_default_state(dev);
+
+ if (device_may_wakeup(dev)) {
+ if (info->id_gpiod) {
+ ret = disable_irq_wake(info->id_irq);
+ if (ret)
+ return ret;
+ }
+ if (info->vbus_gpiod) {
+ ret = disable_irq_wake(info->vbus_irq);
+ if (ret) {
+ if (info->id_gpiod)
+ enable_irq_wake(info->id_irq);
+
+ return ret;
+ }
+ }
+ }
+
+ if (info->id_gpiod)
+ enable_irq(info->id_irq);
+ if (info->vbus_gpiod)
+ enable_irq(info->vbus_irq);
+
+ queue_delayed_work(system_power_efficient_wq,
+ &info->wq_detcable, 0);
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(usb_extcon_pm_ops,
+ usb_extcon_suspend, usb_extcon_resume);
+
+static const struct of_device_id usb_extcon_dt_match[] = {
+ { .compatible = "linux,extcon-usb-gpio", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, usb_extcon_dt_match);
+
+static const struct platform_device_id usb_extcon_platform_ids[] = {
+ { .name = "extcon-usb-gpio", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, usb_extcon_platform_ids);
+
+static struct platform_driver usb_extcon_driver = {
+ .probe = usb_extcon_probe,
+ .remove = usb_extcon_remove,
+ .driver = {
+ .name = "extcon-usb-gpio",
+ .pm = &usb_extcon_pm_ops,
+ .of_match_table = usb_extcon_dt_match,
+ },
+ .id_table = usb_extcon_platform_ids,
+};
+
+module_platform_driver(usb_extcon_driver);
+
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
+MODULE_DESCRIPTION("USB GPIO extcon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon-usbc-cros-ec.c b/drivers/extcon/extcon-usbc-cros-ec.c
new file mode 100644
index 0000000..43c0a93
--- /dev/null
+++ b/drivers/extcon/extcon-usbc-cros-ec.c
@@ -0,0 +1,541 @@
+// SPDX-License-Identifier: GPL-2.0
+// ChromeOS Embedded Controller extcon
+//
+// Copyright (C) 2017 Google, Inc.
+// Author: Benson Leung <bleung@chromium.org>
+
+#include <linux/extcon-provider.h>
+#include <linux/kernel.h>
+#include <linux/mfd/cros_ec.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+struct cros_ec_extcon_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ int port_id;
+
+ struct cros_ec_device *ec;
+
+ struct notifier_block notifier;
+
+ unsigned int dr; /* data role */
+ bool pr; /* power role (true if VBUS enabled) */
+ bool dp; /* DisplayPort enabled */
+ bool mux; /* SuperSpeed (usb3) enabled */
+ unsigned int power_type;
+};
+
+static const unsigned int usb_type_c_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_DISP_DP,
+ EXTCON_NONE,
+};
+
+enum usb_data_roles {
+ DR_NONE,
+ DR_HOST,
+ DR_DEVICE,
+};
+
+/**
+ * cros_ec_pd_command() - Send a command to the EC.
+ * @info: pointer to struct cros_ec_extcon_info
+ * @command: EC command
+ * @version: EC command version
+ * @outdata: EC command output data
+ * @outsize: Size of outdata
+ * @indata: EC command input data
+ * @insize: Size of indata
+ *
+ * Return: 0 on success, <0 on failure.
+ */
+static int cros_ec_pd_command(struct cros_ec_extcon_info *info,
+ unsigned int command,
+ unsigned int version,
+ void *outdata,
+ unsigned int outsize,
+ void *indata,
+ unsigned int insize)
+{
+ struct cros_ec_command *msg;
+ int ret;
+
+ msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->version = version;
+ msg->command = command;
+ msg->outsize = outsize;
+ msg->insize = insize;
+
+ if (outsize)
+ memcpy(msg->data, outdata, outsize);
+
+ ret = cros_ec_cmd_xfer_status(info->ec, msg);
+ if (ret >= 0 && insize)
+ memcpy(indata, msg->data, insize);
+
+ kfree(msg);
+ return ret;
+}
+
+/**
+ * cros_ec_usb_get_power_type() - Get power type info about PD device attached
+ * to given port.
+ * @info: pointer to struct cros_ec_extcon_info
+ *
+ * Return: power type on success, <0 on failure.
+ */
+static int cros_ec_usb_get_power_type(struct cros_ec_extcon_info *info)
+{
+ struct ec_params_usb_pd_power_info req;
+ struct ec_response_usb_pd_power_info resp;
+ int ret;
+
+ req.port = info->port_id;
+ ret = cros_ec_pd_command(info, EC_CMD_USB_PD_POWER_INFO, 0,
+ &req, sizeof(req), &resp, sizeof(resp));
+ if (ret < 0)
+ return ret;
+
+ return resp.type;
+}
+
+/**
+ * cros_ec_usb_get_pd_mux_state() - Get PD mux state for given port.
+ * @info: pointer to struct cros_ec_extcon_info
+ *
+ * Return: PD mux state on success, <0 on failure.
+ */
+static int cros_ec_usb_get_pd_mux_state(struct cros_ec_extcon_info *info)
+{
+ struct ec_params_usb_pd_mux_info req;
+ struct ec_response_usb_pd_mux_info resp;
+ int ret;
+
+ req.port = info->port_id;
+ ret = cros_ec_pd_command(info, EC_CMD_USB_PD_MUX_INFO, 0,
+ &req, sizeof(req),
+ &resp, sizeof(resp));
+ if (ret < 0)
+ return ret;
+
+ return resp.flags;
+}
+
+/**
+ * cros_ec_usb_get_role() - Get role info about possible PD device attached to a
+ * given port.
+ * @info: pointer to struct cros_ec_extcon_info
+ * @polarity: pointer to cable polarity (return value)
+ *
+ * Return: role info on success, -ENOTCONN if no cable is connected, <0 on
+ * failure.
+ */
+static int cros_ec_usb_get_role(struct cros_ec_extcon_info *info,
+ bool *polarity)
+{
+ struct ec_params_usb_pd_control pd_control;
+ struct ec_response_usb_pd_control_v1 resp;
+ int ret;
+
+ pd_control.port = info->port_id;
+ pd_control.role = USB_PD_CTRL_ROLE_NO_CHANGE;
+ pd_control.mux = USB_PD_CTRL_MUX_NO_CHANGE;
+ pd_control.swap = USB_PD_CTRL_SWAP_NONE;
+ ret = cros_ec_pd_command(info, EC_CMD_USB_PD_CONTROL, 1,
+ &pd_control, sizeof(pd_control),
+ &resp, sizeof(resp));
+ if (ret < 0)
+ return ret;
+
+ if (!(resp.enabled & PD_CTRL_RESP_ENABLED_CONNECTED))
+ return -ENOTCONN;
+
+ *polarity = resp.polarity;
+
+ return resp.role;
+}
+
+/**
+ * cros_ec_pd_get_num_ports() - Get number of EC charge ports.
+ * @info: pointer to struct cros_ec_extcon_info
+ *
+ * Return: number of ports on success, <0 on failure.
+ */
+static int cros_ec_pd_get_num_ports(struct cros_ec_extcon_info *info)
+{
+ struct ec_response_usb_pd_ports resp;
+ int ret;
+
+ ret = cros_ec_pd_command(info, EC_CMD_USB_PD_PORTS,
+ 0, NULL, 0, &resp, sizeof(resp));
+ if (ret < 0)
+ return ret;
+
+ return resp.num_ports;
+}
+
+static const char *cros_ec_usb_role_string(unsigned int role)
+{
+ return role == DR_NONE ? "DISCONNECTED" :
+ (role == DR_HOST ? "DFP" : "UFP");
+}
+
+static const char *cros_ec_usb_power_type_string(unsigned int type)
+{
+ switch (type) {
+ case USB_CHG_TYPE_NONE:
+ return "USB_CHG_TYPE_NONE";
+ case USB_CHG_TYPE_PD:
+ return "USB_CHG_TYPE_PD";
+ case USB_CHG_TYPE_PROPRIETARY:
+ return "USB_CHG_TYPE_PROPRIETARY";
+ case USB_CHG_TYPE_C:
+ return "USB_CHG_TYPE_C";
+ case USB_CHG_TYPE_BC12_DCP:
+ return "USB_CHG_TYPE_BC12_DCP";
+ case USB_CHG_TYPE_BC12_CDP:
+ return "USB_CHG_TYPE_BC12_CDP";
+ case USB_CHG_TYPE_BC12_SDP:
+ return "USB_CHG_TYPE_BC12_SDP";
+ case USB_CHG_TYPE_OTHER:
+ return "USB_CHG_TYPE_OTHER";
+ case USB_CHG_TYPE_VBUS:
+ return "USB_CHG_TYPE_VBUS";
+ case USB_CHG_TYPE_UNKNOWN:
+ return "USB_CHG_TYPE_UNKNOWN";
+ default:
+ return "USB_CHG_TYPE_UNKNOWN";
+ }
+}
+
+static bool cros_ec_usb_power_type_is_wall_wart(unsigned int type,
+ unsigned int role)
+{
+ switch (type) {
+ /* FIXME : Guppy, Donnettes, and other chargers will be miscategorized
+ * because they identify with USB_CHG_TYPE_C, but we can't return true
+ * here from that code because that breaks Suzy-Q and other kinds of
+ * USB Type-C cables and peripherals.
+ */
+ case USB_CHG_TYPE_PROPRIETARY:
+ case USB_CHG_TYPE_BC12_DCP:
+ return true;
+ case USB_CHG_TYPE_PD:
+ case USB_CHG_TYPE_C:
+ case USB_CHG_TYPE_BC12_CDP:
+ case USB_CHG_TYPE_BC12_SDP:
+ case USB_CHG_TYPE_OTHER:
+ case USB_CHG_TYPE_VBUS:
+ case USB_CHG_TYPE_UNKNOWN:
+ case USB_CHG_TYPE_NONE:
+ default:
+ return false;
+ }
+}
+
+static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info,
+ bool force)
+{
+ struct device *dev = info->dev;
+ int role, power_type;
+ unsigned int dr = DR_NONE;
+ bool pr = false;
+ bool polarity = false;
+ bool dp = false;
+ bool mux = false;
+ bool hpd = false;
+
+ power_type = cros_ec_usb_get_power_type(info);
+ if (power_type < 0) {
+ dev_err(dev, "failed getting power type err = %d\n",
+ power_type);
+ return power_type;
+ }
+
+ role = cros_ec_usb_get_role(info, &polarity);
+ if (role < 0) {
+ if (role != -ENOTCONN) {
+ dev_err(dev, "failed getting role err = %d\n", role);
+ return role;
+ }
+ dev_dbg(dev, "disconnected\n");
+ } else {
+ int pd_mux_state;
+
+ dr = (role & PD_CTRL_RESP_ROLE_DATA) ? DR_HOST : DR_DEVICE;
+ pr = (role & PD_CTRL_RESP_ROLE_POWER);
+ pd_mux_state = cros_ec_usb_get_pd_mux_state(info);
+ if (pd_mux_state < 0)
+ pd_mux_state = USB_PD_MUX_USB_ENABLED;
+
+ dp = pd_mux_state & USB_PD_MUX_DP_ENABLED;
+ mux = pd_mux_state & USB_PD_MUX_USB_ENABLED;
+ hpd = pd_mux_state & USB_PD_MUX_HPD_IRQ;
+
+ dev_dbg(dev,
+ "connected role 0x%x pwr type %d dr %d pr %d pol %d mux %d dp %d hpd %d\n",
+ role, power_type, dr, pr, polarity, mux, dp, hpd);
+ }
+
+ /*
+ * When there is no USB host (e.g. USB PD charger),
+ * we are not really a UFP for the AP.
+ */
+ if (dr == DR_DEVICE &&
+ cros_ec_usb_power_type_is_wall_wart(power_type, role))
+ dr = DR_NONE;
+
+ if (force || info->dr != dr || info->pr != pr || info->dp != dp ||
+ info->mux != mux || info->power_type != power_type) {
+ bool host_connected = false, device_connected = false;
+
+ dev_dbg(dev, "Type/Role switch! type = %s role = %s\n",
+ cros_ec_usb_power_type_string(power_type),
+ cros_ec_usb_role_string(dr));
+ info->dr = dr;
+ info->pr = pr;
+ info->dp = dp;
+ info->mux = mux;
+ info->power_type = power_type;
+
+ if (dr == DR_DEVICE)
+ device_connected = true;
+ else if (dr == DR_HOST)
+ host_connected = true;
+
+ extcon_set_state(info->edev, EXTCON_USB, device_connected);
+ extcon_set_state(info->edev, EXTCON_USB_HOST, host_connected);
+ extcon_set_state(info->edev, EXTCON_DISP_DP, dp);
+ extcon_set_property(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_VBUS,
+ (union extcon_property_value)(int)pr);
+ extcon_set_property(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_VBUS,
+ (union extcon_property_value)(int)pr);
+ extcon_set_property(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_TYPEC_POLARITY,
+ (union extcon_property_value)(int)polarity);
+ extcon_set_property(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_TYPEC_POLARITY,
+ (union extcon_property_value)(int)polarity);
+ extcon_set_property(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_TYPEC_POLARITY,
+ (union extcon_property_value)(int)polarity);
+ extcon_set_property(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_SS,
+ (union extcon_property_value)(int)mux);
+ extcon_set_property(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_SS,
+ (union extcon_property_value)(int)mux);
+ extcon_set_property(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_SS,
+ (union extcon_property_value)(int)mux);
+ extcon_set_property(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_DISP_HPD,
+ (union extcon_property_value)(int)hpd);
+
+ extcon_sync(info->edev, EXTCON_USB);
+ extcon_sync(info->edev, EXTCON_USB_HOST);
+ extcon_sync(info->edev, EXTCON_DISP_DP);
+
+ } else if (hpd) {
+ extcon_set_property(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_DISP_HPD,
+ (union extcon_property_value)(int)hpd);
+ extcon_sync(info->edev, EXTCON_DISP_DP);
+ }
+
+ return 0;
+}
+
+static int extcon_cros_ec_event(struct notifier_block *nb,
+ unsigned long queued_during_suspend,
+ void *_notify)
+{
+ struct cros_ec_extcon_info *info;
+ struct cros_ec_device *ec;
+ u32 host_event;
+
+ info = container_of(nb, struct cros_ec_extcon_info, notifier);
+ ec = info->ec;
+
+ host_event = cros_ec_get_host_event(ec);
+ if (host_event & (EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU) |
+ EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX))) {
+ extcon_cros_ec_detect_cable(info, false);
+ return NOTIFY_OK;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int extcon_cros_ec_probe(struct platform_device *pdev)
+{
+ struct cros_ec_extcon_info *info;
+ struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int numports, ret;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = dev;
+ info->ec = ec;
+
+ if (np) {
+ u32 port;
+
+ ret = of_property_read_u32(np, "google,usb-port-id", &port);
+ if (ret < 0) {
+ dev_err(dev, "Missing google,usb-port-id property\n");
+ return ret;
+ }
+ info->port_id = port;
+ } else {
+ info->port_id = pdev->id;
+ }
+
+ numports = cros_ec_pd_get_num_ports(info);
+ if (numports < 0) {
+ dev_err(dev, "failed getting number of ports! ret = %d\n",
+ numports);
+ return numports;
+ }
+
+ if (info->port_id >= numports) {
+ dev_err(dev, "This system only supports %d ports\n", numports);
+ return -ENODEV;
+ }
+
+ info->edev = devm_extcon_dev_allocate(dev, usb_type_c_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(dev, info->edev);
+ if (ret < 0) {
+ dev_err(dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ extcon_set_property_capability(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_VBUS);
+ extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_VBUS);
+ extcon_set_property_capability(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+ extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+ extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+ extcon_set_property_capability(info->edev, EXTCON_USB,
+ EXTCON_PROP_USB_SS);
+ extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_SS);
+ extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_SS);
+ extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
+ EXTCON_PROP_DISP_HPD);
+
+ info->dr = DR_NONE;
+ info->pr = false;
+
+ platform_set_drvdata(pdev, info);
+
+ /* Get PD events from the EC */
+ info->notifier.notifier_call = extcon_cros_ec_event;
+ ret = blocking_notifier_chain_register(&info->ec->event_notifier,
+ &info->notifier);
+ if (ret < 0) {
+ dev_err(dev, "failed to register notifier\n");
+ return ret;
+ }
+
+ /* Perform initial detection */
+ ret = extcon_cros_ec_detect_cable(info, true);
+ if (ret < 0) {
+ dev_err(dev, "failed to detect initial cable state\n");
+ goto unregister_notifier;
+ }
+
+ return 0;
+
+unregister_notifier:
+ blocking_notifier_chain_unregister(&info->ec->event_notifier,
+ &info->notifier);
+ return ret;
+}
+
+static int extcon_cros_ec_remove(struct platform_device *pdev)
+{
+ struct cros_ec_extcon_info *info = platform_get_drvdata(pdev);
+
+ blocking_notifier_chain_unregister(&info->ec->event_notifier,
+ &info->notifier);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int extcon_cros_ec_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int extcon_cros_ec_resume(struct device *dev)
+{
+ int ret;
+ struct cros_ec_extcon_info *info = dev_get_drvdata(dev);
+
+ ret = extcon_cros_ec_detect_cable(info, true);
+ if (ret < 0)
+ dev_err(dev, "failed to detect cable state on resume\n");
+
+ return 0;
+}
+
+static const struct dev_pm_ops extcon_cros_ec_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(extcon_cros_ec_suspend, extcon_cros_ec_resume)
+};
+
+#define DEV_PM_OPS (&extcon_cros_ec_dev_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_OF
+static const struct of_device_id extcon_cros_ec_of_match[] = {
+ { .compatible = "google,extcon-usbc-cros-ec" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, extcon_cros_ec_of_match);
+#endif /* CONFIG_OF */
+
+static struct platform_driver extcon_cros_ec_driver = {
+ .driver = {
+ .name = "extcon-usbc-cros-ec",
+ .of_match_table = of_match_ptr(extcon_cros_ec_of_match),
+ .pm = DEV_PM_OPS,
+ },
+ .remove = extcon_cros_ec_remove,
+ .probe = extcon_cros_ec_probe,
+};
+
+module_platform_driver(extcon_cros_ec_driver);
+
+MODULE_DESCRIPTION("ChromeOS Embedded Controller extcon driver");
+MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
new file mode 100644
index 0000000..b9d27c8
--- /dev/null
+++ b/drivers/extcon/extcon.c
@@ -0,0 +1,1440 @@
+/*
+ * drivers/extcon/extcon.c - External Connector (extcon) framework.
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Author: Donggeun Kim <dg77.kim@samsung.com>
+ * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * based on android/drivers/switch/switch_class.c
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+#include "extcon.h"
+
+#define SUPPORTED_CABLE_MAX 32
+
+static const struct __extcon_info {
+ unsigned int type;
+ unsigned int id;
+ const char *name;
+
+} extcon_info[] = {
+ [EXTCON_NONE] = {
+ .type = EXTCON_TYPE_MISC,
+ .id = EXTCON_NONE,
+ .name = "NONE",
+ },
+
+ /* USB external connector */
+ [EXTCON_USB] = {
+ .type = EXTCON_TYPE_USB,
+ .id = EXTCON_USB,
+ .name = "USB",
+ },
+ [EXTCON_USB_HOST] = {
+ .type = EXTCON_TYPE_USB,
+ .id = EXTCON_USB_HOST,
+ .name = "USB-HOST",
+ },
+
+ /* Charging external connector */
+ [EXTCON_CHG_USB_SDP] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_SDP,
+ .name = "SDP",
+ },
+ [EXTCON_CHG_USB_DCP] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_DCP,
+ .name = "DCP",
+ },
+ [EXTCON_CHG_USB_CDP] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_CDP,
+ .name = "CDP",
+ },
+ [EXTCON_CHG_USB_ACA] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_ACA,
+ .name = "ACA",
+ },
+ [EXTCON_CHG_USB_FAST] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_FAST,
+ .name = "FAST-CHARGER",
+ },
+ [EXTCON_CHG_USB_SLOW] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_SLOW,
+ .name = "SLOW-CHARGER",
+ },
+ [EXTCON_CHG_WPT] = {
+ .type = EXTCON_TYPE_CHG,
+ .id = EXTCON_CHG_WPT,
+ .name = "WPT",
+ },
+ [EXTCON_CHG_USB_PD] = {
+ .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+ .id = EXTCON_CHG_USB_PD,
+ .name = "PD",
+ },
+
+ /* Jack external connector */
+ [EXTCON_JACK_MICROPHONE] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_MICROPHONE,
+ .name = "MICROPHONE",
+ },
+ [EXTCON_JACK_HEADPHONE] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_HEADPHONE,
+ .name = "HEADPHONE",
+ },
+ [EXTCON_JACK_LINE_IN] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_LINE_IN,
+ .name = "LINE-IN",
+ },
+ [EXTCON_JACK_LINE_OUT] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_LINE_OUT,
+ .name = "LINE-OUT",
+ },
+ [EXTCON_JACK_VIDEO_IN] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_VIDEO_IN,
+ .name = "VIDEO-IN",
+ },
+ [EXTCON_JACK_VIDEO_OUT] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_VIDEO_OUT,
+ .name = "VIDEO-OUT",
+ },
+ [EXTCON_JACK_SPDIF_IN] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_SPDIF_IN,
+ .name = "SPDIF-IN",
+ },
+ [EXTCON_JACK_SPDIF_OUT] = {
+ .type = EXTCON_TYPE_JACK,
+ .id = EXTCON_JACK_SPDIF_OUT,
+ .name = "SPDIF-OUT",
+ },
+
+ /* Display external connector */
+ [EXTCON_DISP_HDMI] = {
+ .type = EXTCON_TYPE_DISP,
+ .id = EXTCON_DISP_HDMI,
+ .name = "HDMI",
+ },
+ [EXTCON_DISP_MHL] = {
+ .type = EXTCON_TYPE_DISP,
+ .id = EXTCON_DISP_MHL,
+ .name = "MHL",
+ },
+ [EXTCON_DISP_DVI] = {
+ .type = EXTCON_TYPE_DISP,
+ .id = EXTCON_DISP_DVI,
+ .name = "DVI",
+ },
+ [EXTCON_DISP_VGA] = {
+ .type = EXTCON_TYPE_DISP,
+ .id = EXTCON_DISP_VGA,
+ .name = "VGA",
+ },
+ [EXTCON_DISP_DP] = {
+ .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB,
+ .id = EXTCON_DISP_DP,
+ .name = "DP",
+ },
+ [EXTCON_DISP_HMD] = {
+ .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB,
+ .id = EXTCON_DISP_HMD,
+ .name = "HMD",
+ },
+
+ /* Miscellaneous external connector */
+ [EXTCON_DOCK] = {
+ .type = EXTCON_TYPE_MISC,
+ .id = EXTCON_DOCK,
+ .name = "DOCK",
+ },
+ [EXTCON_JIG] = {
+ .type = EXTCON_TYPE_MISC,
+ .id = EXTCON_JIG,
+ .name = "JIG",
+ },
+ [EXTCON_MECHANICAL] = {
+ .type = EXTCON_TYPE_MISC,
+ .id = EXTCON_MECHANICAL,
+ .name = "MECHANICAL",
+ },
+
+ { /* sentinel */ }
+};
+
+/**
+ * struct extcon_cable - An internal data for an external connector.
+ * @edev: the extcon device
+ * @cable_index: the index of this cable in the edev
+ * @attr_g: the attribute group for the cable
+ * @attr_name: "name" sysfs entry
+ * @attr_state: "state" sysfs entry
+ * @attrs: the array pointing to attr_name and attr_state for attr_g
+ */
+struct extcon_cable {
+ struct extcon_dev *edev;
+ int cable_index;
+
+ struct attribute_group attr_g;
+ struct device_attribute attr_name;
+ struct device_attribute attr_state;
+
+ struct attribute *attrs[3]; /* to be fed to attr_g.attrs */
+
+ union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT];
+ union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT];
+ union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT];
+ union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT];
+
+ unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)];
+ unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)];
+ unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)];
+ unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)];
+};
+
+static struct class *extcon_class;
+
+static LIST_HEAD(extcon_dev_list);
+static DEFINE_MUTEX(extcon_dev_list_lock);
+
+static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state)
+{
+ int i = 0;
+
+ if (!edev->mutually_exclusive)
+ return 0;
+
+ for (i = 0; edev->mutually_exclusive[i]; i++) {
+ int weight;
+ u32 correspondants = new_state & edev->mutually_exclusive[i];
+
+ /* calculate the total number of bits set */
+ weight = hweight32(correspondants);
+ if (weight > 1)
+ return i + 1;
+ }
+
+ return 0;
+}
+
+static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id)
+{
+ int i;
+
+ /* Find the the index of extcon cable in edev->supported_cable */
+ for (i = 0; i < edev->max_supported; i++) {
+ if (edev->supported_cable[i] == id)
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int get_extcon_type(unsigned int prop)
+{
+ switch (prop) {
+ case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX:
+ return EXTCON_TYPE_USB;
+ case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX:
+ return EXTCON_TYPE_CHG;
+ case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX:
+ return EXTCON_TYPE_JACK;
+ case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX:
+ return EXTCON_TYPE_DISP;
+ default:
+ return -EINVAL;
+ }
+}
+
+static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index)
+{
+ return !!(edev->state & BIT(index));
+}
+
+static bool is_extcon_changed(struct extcon_dev *edev, int index,
+ bool new_state)
+{
+ int state = !!(edev->state & BIT(index));
+ return (state != new_state);
+}
+
+static bool is_extcon_property_supported(unsigned int id, unsigned int prop)
+{
+ int type;
+
+ /* Check whether the property is supported or not. */
+ type = get_extcon_type(prop);
+ if (type < 0)
+ return false;
+
+ /* Check whether a specific extcon id supports the property or not. */
+ return !!(extcon_info[id].type & type);
+}
+
+static int is_extcon_property_capability(struct extcon_dev *edev,
+ unsigned int id, int index,unsigned int prop)
+{
+ struct extcon_cable *cable;
+ int type, ret;
+
+ /* Check whether the property is supported or not. */
+ type = get_extcon_type(prop);
+ if (type < 0)
+ return type;
+
+ cable = &edev->cables[index];
+
+ switch (type) {
+ case EXTCON_TYPE_USB:
+ ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);
+ break;
+ case EXTCON_TYPE_CHG:
+ ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);
+ break;
+ case EXTCON_TYPE_JACK:
+ ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);
+ break;
+ case EXTCON_TYPE_DISP:
+ ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static void init_property(struct extcon_dev *edev, unsigned int id, int index)
+{
+ unsigned int type = extcon_info[id].type;
+ struct extcon_cable *cable = &edev->cables[index];
+
+ if (EXTCON_TYPE_USB & type)
+ memset(cable->usb_propval, 0, sizeof(cable->usb_propval));
+ if (EXTCON_TYPE_CHG & type)
+ memset(cable->chg_propval, 0, sizeof(cable->chg_propval));
+ if (EXTCON_TYPE_JACK & type)
+ memset(cable->jack_propval, 0, sizeof(cable->jack_propval));
+ if (EXTCON_TYPE_DISP & type)
+ memset(cable->disp_propval, 0, sizeof(cable->disp_propval));
+}
+
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int i, count = 0;
+ struct extcon_dev *edev = dev_get_drvdata(dev);
+
+ if (edev->max_supported == 0)
+ return sprintf(buf, "%u\n", edev->state);
+
+ for (i = 0; i < edev->max_supported; i++) {
+ count += sprintf(buf + count, "%s=%d\n",
+ extcon_info[edev->supported_cable[i]].name,
+ !!(edev->state & BIT(i)));
+ }
+
+ return count;
+}
+static DEVICE_ATTR_RO(state);
+
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct extcon_dev *edev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", edev->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t cable_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct extcon_cable *cable = container_of(attr, struct extcon_cable,
+ attr_name);
+ int i = cable->cable_index;
+
+ return sprintf(buf, "%s\n",
+ extcon_info[cable->edev->supported_cable[i]].name);
+}
+
+static ssize_t cable_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct extcon_cable *cable = container_of(attr, struct extcon_cable,
+ attr_state);
+
+ int i = cable->cable_index;
+
+ return sprintf(buf, "%d\n",
+ extcon_get_state(cable->edev, cable->edev->supported_cable[i]));
+}
+
+/**
+ * extcon_sync() - Synchronize the state for an external connector.
+ * @edev: the extcon device
+ *
+ * Note that this function send a notification in order to synchronize
+ * the state and property of an external connector.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_sync(struct extcon_dev *edev, unsigned int id)
+{
+ char name_buf[120];
+ char state_buf[120];
+ char *prop_buf;
+ char *envp[3];
+ int env_offset = 0;
+ int length;
+ int index;
+ int state;
+ unsigned long flags;
+
+ if (!edev)
+ return -EINVAL;
+
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ state = !!(edev->state & BIT(index));
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ /*
+ * Call functions in a raw notifier chain for the specific one
+ * external connector.
+ */
+ raw_notifier_call_chain(&edev->nh[index], state, edev);
+
+ /*
+ * Call functions in a raw notifier chain for the all supported
+ * external connectors.
+ */
+ raw_notifier_call_chain(&edev->nh_all, state, edev);
+
+ spin_lock_irqsave(&edev->lock, flags);
+ /* This could be in interrupt handler */
+ prop_buf = (char *)get_zeroed_page(GFP_ATOMIC);
+ if (!prop_buf) {
+ /* Unlock early before uevent */
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ dev_err(&edev->dev, "out of memory in extcon_set_state\n");
+ kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE);
+
+ return -ENOMEM;
+ }
+
+ length = name_show(&edev->dev, NULL, prop_buf);
+ if (length > 0) {
+ if (prop_buf[length - 1] == '\n')
+ prop_buf[length - 1] = 0;
+ snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf);
+ envp[env_offset++] = name_buf;
+ }
+
+ length = state_show(&edev->dev, NULL, prop_buf);
+ if (length > 0) {
+ if (prop_buf[length - 1] == '\n')
+ prop_buf[length - 1] = 0;
+ snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf);
+ envp[env_offset++] = state_buf;
+ }
+ envp[env_offset] = NULL;
+
+ /* Unlock early before uevent */
+ spin_unlock_irqrestore(&edev->lock, flags);
+ kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp);
+ free_page((unsigned long)prop_buf);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(extcon_sync);
+
+/**
+ * extcon_get_state() - Get the state of an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_get_state(struct extcon_dev *edev, const unsigned int id)
+{
+ int index, state;
+ unsigned long flags;
+
+ if (!edev)
+ return -EINVAL;
+
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ state = is_extcon_attached(edev, index);
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return state;
+}
+EXPORT_SYMBOL_GPL(extcon_get_state);
+
+/**
+ * extcon_set_state() - Set the state of an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @state: the new state of an external connector.
+ * the default semantics is true: attached / false: detached.
+ *
+ * Note that this function set the state of an external connector without
+ * a notification. To synchronize the state of an external connector,
+ * have to use extcon_set_state_sync() and extcon_sync().
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state)
+{
+ unsigned long flags;
+ int index, ret = 0;
+
+ if (!edev)
+ return -EINVAL;
+
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ spin_lock_irqsave(&edev->lock, flags);
+
+ /* Check whether the external connector's state is changed. */
+ if (!is_extcon_changed(edev, index, state))
+ goto out;
+
+ if (check_mutually_exclusive(edev,
+ (edev->state & ~BIT(index)) | (state & BIT(index)))) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ /*
+ * Initialize the value of extcon property before setting
+ * the detached state for an external connector.
+ */
+ if (!state)
+ init_property(edev, id, index);
+
+ /* Update the state for an external connector. */
+ if (state)
+ edev->state |= BIT(index);
+ else
+ edev->state &= ~(BIT(index));
+out:
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_set_state);
+
+/**
+ * extcon_set_state_sync() - Set the state of an external connector with sync.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @state: the new state of external connector.
+ * the default semantics is true: attached / false: detached.
+ *
+ * Note that this function set the state of external connector
+ * and synchronize the state by sending a notification.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state)
+{
+ int ret, index;
+ unsigned long flags;
+
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ /* Check whether the external connector's state is changed. */
+ spin_lock_irqsave(&edev->lock, flags);
+ ret = is_extcon_changed(edev, index, state);
+ spin_unlock_irqrestore(&edev->lock, flags);
+ if (!ret)
+ return 0;
+
+ ret = extcon_set_state(edev, id, state);
+ if (ret < 0)
+ return ret;
+
+ return extcon_sync(edev, id);
+}
+EXPORT_SYMBOL_GPL(extcon_set_state_sync);
+
+/**
+ * extcon_get_property() - Get the property value of an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @prop: the property id indicating an extcon property
+ * @prop_val: the pointer which store the value of extcon property
+ *
+ * Note that when getting the property value of external connector,
+ * the external connector should be attached. If detached state, function
+ * return 0 without property value. Also, the each property should be
+ * included in the list of supported properties according to extcon type.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_get_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value *prop_val)
+{
+ struct extcon_cable *cable;
+ unsigned long flags;
+ int index, ret = 0;
+
+ *prop_val = (union extcon_property_value)(0);
+
+ if (!edev)
+ return -EINVAL;
+
+ /* Check whether the property is supported or not */
+ if (!is_extcon_property_supported(id, prop))
+ return -EINVAL;
+
+ /* Find the cable index of external connector by using id */
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ spin_lock_irqsave(&edev->lock, flags);
+
+ /* Check whether the property is available or not. */
+ if (!is_extcon_property_capability(edev, id, index, prop)) {
+ spin_unlock_irqrestore(&edev->lock, flags);
+ return -EPERM;
+ }
+
+ /*
+ * Check whether the external connector is attached.
+ * If external connector is detached, the user can not
+ * get the property value.
+ */
+ if (!is_extcon_attached(edev, index)) {
+ spin_unlock_irqrestore(&edev->lock, flags);
+ return 0;
+ }
+
+ cable = &edev->cables[index];
+
+ /* Get the property value according to extcon type */
+ switch (prop) {
+ case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX:
+ *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN];
+ break;
+ case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX:
+ *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN];
+ break;
+ case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX:
+ *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN];
+ break;
+ case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX:
+ *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN];
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_get_property);
+
+/**
+ * extcon_set_property() - Set the property value of an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @prop: the property id indicating an extcon property
+ * @prop_val: the pointer including the new value of extcon property
+ *
+ * Note that each property should be included in the list of supported
+ * properties according to the extcon type.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_set_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value prop_val)
+{
+ struct extcon_cable *cable;
+ unsigned long flags;
+ int index, ret = 0;
+
+ if (!edev)
+ return -EINVAL;
+
+ /* Check whether the property is supported or not */
+ if (!is_extcon_property_supported(id, prop))
+ return -EINVAL;
+
+ /* Find the cable index of external connector by using id */
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ spin_lock_irqsave(&edev->lock, flags);
+
+ /* Check whether the property is available or not. */
+ if (!is_extcon_property_capability(edev, id, index, prop)) {
+ spin_unlock_irqrestore(&edev->lock, flags);
+ return -EPERM;
+ }
+
+ cable = &edev->cables[index];
+
+ /* Set the property value according to extcon type */
+ switch (prop) {
+ case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX:
+ cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val;
+ break;
+ case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX:
+ cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val;
+ break;
+ case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX:
+ cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val;
+ break;
+ case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX:
+ cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_set_property);
+
+/**
+ * extcon_set_property_sync() - Set property of an external connector with sync.
+ * @prop_val: the pointer including the new value of extcon property
+ *
+ * Note that when setting the property value of external connector,
+ * the external connector should be attached. The each property should
+ * be included in the list of supported properties according to extcon type.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value prop_val)
+{
+ int ret;
+
+ ret = extcon_set_property(edev, id, prop, prop_val);
+ if (ret < 0)
+ return ret;
+
+ return extcon_sync(edev, id);
+}
+EXPORT_SYMBOL_GPL(extcon_set_property_sync);
+
+/**
+ * extcon_get_property_capability() - Get the capability of the property
+ * for an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @prop: the property id indicating an extcon property
+ *
+ * Returns 1 if the property is available or 0 if not available.
+ */
+int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop)
+{
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ /* Check whether the property is supported or not */
+ if (!is_extcon_property_supported(id, prop))
+ return -EINVAL;
+
+ /* Find the cable index of external connector by using id */
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ return is_extcon_property_capability(edev, id, index, prop);
+}
+EXPORT_SYMBOL_GPL(extcon_get_property_capability);
+
+/**
+ * extcon_set_property_capability() - Set the capability of the property
+ * for an external connector.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @prop: the property id indicating an extcon property
+ *
+ * Note that this function set the capability of the property
+ * for an external connector in order to mark the bit in capability
+ * bitmap which mean the available state of the property.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop)
+{
+ struct extcon_cable *cable;
+ int index, type, ret = 0;
+
+ if (!edev)
+ return -EINVAL;
+
+ /* Check whether the property is supported or not. */
+ if (!is_extcon_property_supported(id, prop))
+ return -EINVAL;
+
+ /* Find the cable index of external connector by using id. */
+ index = find_cable_index_by_id(edev, id);
+ if (index < 0)
+ return index;
+
+ type = get_extcon_type(prop);
+ if (type < 0)
+ return type;
+
+ cable = &edev->cables[index];
+
+ switch (type) {
+ case EXTCON_TYPE_USB:
+ __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);
+ break;
+ case EXTCON_TYPE_CHG:
+ __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);
+ break;
+ case EXTCON_TYPE_JACK:
+ __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);
+ break;
+ case EXTCON_TYPE_DISP:
+ __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_set_property_capability);
+
+/**
+ * extcon_get_extcon_dev() - Get the extcon device instance from the name.
+ * @extcon_name: the extcon name provided with extcon_dev_register()
+ *
+ * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
+ */
+struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
+{
+ struct extcon_dev *sd;
+
+ if (!extcon_name)
+ return ERR_PTR(-EINVAL);
+
+ mutex_lock(&extcon_dev_list_lock);
+ list_for_each_entry(sd, &extcon_dev_list, entry) {
+ if (!strcmp(sd->name, extcon_name))
+ goto out;
+ }
+ sd = NULL;
+out:
+ mutex_unlock(&extcon_dev_list_lock);
+ return sd;
+}
+EXPORT_SYMBOL_GPL(extcon_get_extcon_dev);
+
+/**
+ * extcon_register_notifier() - Register a notifier block to get notified by
+ * any state changes from the extcon.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @nb: a notifier block to be registered
+ *
+ * Note that the second parameter given to the callback of nb (val) is
+ * the current state of an external connector and the third pameter
+ * is the pointer of extcon device.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
+ struct notifier_block *nb)
+{
+ unsigned long flags;
+ int ret, idx = -EINVAL;
+
+ if (!edev || !nb)
+ return -EINVAL;
+
+ idx = find_cable_index_by_id(edev, id);
+ if (idx < 0)
+ return idx;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ ret = raw_notifier_chain_register(&edev->nh[idx], nb);
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_register_notifier);
+
+/**
+ * extcon_unregister_notifier() - Unregister a notifier block from the extcon.
+ * @edev: the extcon device
+ * @id: the unique id indicating an external connector
+ * @nb: a notifier block to be registered
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
+ struct notifier_block *nb)
+{
+ unsigned long flags;
+ int ret, idx;
+
+ if (!edev || !nb)
+ return -EINVAL;
+
+ idx = find_cable_index_by_id(edev, id);
+ if (idx < 0)
+ return idx;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ ret = raw_notifier_chain_unregister(&edev->nh[idx], nb);
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_unregister_notifier);
+
+/**
+ * extcon_register_notifier_all() - Register a notifier block for all connectors.
+ * @edev: the extcon device
+ * @nb: a notifier block to be registered
+ *
+ * Note that this function registers a notifier block in order to receive
+ * the state change of all supported external connectors from extcon device.
+ * And the second parameter given to the callback of nb (val) is
+ * the current state and the third pameter is the pointer of extcon device.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_register_notifier_all(struct extcon_dev *edev,
+ struct notifier_block *nb)
+{
+ unsigned long flags;
+ int ret;
+
+ if (!edev || !nb)
+ return -EINVAL;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ ret = raw_notifier_chain_register(&edev->nh_all, nb);
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_register_notifier_all);
+
+/**
+ * extcon_unregister_notifier_all() - Unregister a notifier block from extcon.
+ * @edev: the extcon device
+ * @nb: a notifier block to be registered
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_unregister_notifier_all(struct extcon_dev *edev,
+ struct notifier_block *nb)
+{
+ unsigned long flags;
+ int ret;
+
+ if (!edev || !nb)
+ return -EINVAL;
+
+ spin_lock_irqsave(&edev->lock, flags);
+ ret = raw_notifier_chain_unregister(&edev->nh_all, nb);
+ spin_unlock_irqrestore(&edev->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all);
+
+static struct attribute *extcon_attrs[] = {
+ &dev_attr_state.attr,
+ &dev_attr_name.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(extcon);
+
+static int create_extcon_class(void)
+{
+ if (!extcon_class) {
+ extcon_class = class_create(THIS_MODULE, "extcon");
+ if (IS_ERR(extcon_class))
+ return PTR_ERR(extcon_class);
+ extcon_class->dev_groups = extcon_groups;
+ }
+
+ return 0;
+}
+
+static void extcon_dev_release(struct device *dev)
+{
+}
+
+static const char *muex_name = "mutually_exclusive";
+static void dummy_sysfs_dev_release(struct device *dev)
+{
+}
+
+/*
+ * extcon_dev_allocate() - Allocate the memory of extcon device.
+ * @supported_cable: the array of the supported external connectors
+ * ending with EXTCON_NONE.
+ *
+ * Note that this function allocates the memory for extcon device
+ * and initialize default setting for the extcon device.
+ *
+ * Returns the pointer memory of allocated extcon_dev if success
+ * or ERR_PTR(err) if fail.
+ */
+struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable)
+{
+ struct extcon_dev *edev;
+
+ if (!supported_cable)
+ return ERR_PTR(-EINVAL);
+
+ edev = kzalloc(sizeof(*edev), GFP_KERNEL);
+ if (!edev)
+ return ERR_PTR(-ENOMEM);
+
+ edev->max_supported = 0;
+ edev->supported_cable = supported_cable;
+
+ return edev;
+}
+
+/*
+ * extcon_dev_free() - Free the memory of extcon device.
+ * @edev: the extcon device
+ */
+void extcon_dev_free(struct extcon_dev *edev)
+{
+ kfree(edev);
+}
+EXPORT_SYMBOL_GPL(extcon_dev_free);
+
+/**
+ * extcon_dev_register() - Register an new extcon device
+ * @edev: the extcon device to be registered
+ *
+ * Among the members of edev struct, please set the "user initializing data"
+ * do not set the values of "internal data", which are initialized by
+ * this function.
+ *
+ * Note that before calling this funciton, have to allocate the memory
+ * of an extcon device by using the extcon_dev_allocate(). And the extcon
+ * dev should include the supported_cable information.
+ *
+ * Returns 0 if success or error number if fail.
+ */
+int extcon_dev_register(struct extcon_dev *edev)
+{
+ int ret, index = 0;
+ static atomic_t edev_no = ATOMIC_INIT(-1);
+
+ if (!extcon_class) {
+ ret = create_extcon_class();
+ if (ret < 0)
+ return ret;
+ }
+
+ if (!edev || !edev->supported_cable)
+ return -EINVAL;
+
+ for (; edev->supported_cable[index] != EXTCON_NONE; index++);
+
+ edev->max_supported = index;
+ if (index > SUPPORTED_CABLE_MAX) {
+ dev_err(&edev->dev,
+ "exceed the maximum number of supported cables\n");
+ return -EINVAL;
+ }
+
+ edev->dev.class = extcon_class;
+ edev->dev.release = extcon_dev_release;
+
+ edev->name = dev_name(edev->dev.parent);
+ if (IS_ERR_OR_NULL(edev->name)) {
+ dev_err(&edev->dev,
+ "extcon device name is null\n");
+ return -EINVAL;
+ }
+ dev_set_name(&edev->dev, "extcon%lu",
+ (unsigned long)atomic_inc_return(&edev_no));
+
+ if (edev->max_supported) {
+ char buf[10];
+ char *str;
+ struct extcon_cable *cable;
+
+ edev->cables = kcalloc(edev->max_supported,
+ sizeof(struct extcon_cable),
+ GFP_KERNEL);
+ if (!edev->cables) {
+ ret = -ENOMEM;
+ goto err_sysfs_alloc;
+ }
+ for (index = 0; index < edev->max_supported; index++) {
+ cable = &edev->cables[index];
+
+ snprintf(buf, 10, "cable.%d", index);
+ str = kzalloc(strlen(buf) + 1,
+ GFP_KERNEL);
+ if (!str) {
+ for (index--; index >= 0; index--) {
+ cable = &edev->cables[index];
+ kfree(cable->attr_g.name);
+ }
+ ret = -ENOMEM;
+
+ goto err_alloc_cables;
+ }
+ strcpy(str, buf);
+
+ cable->edev = edev;
+ cable->cable_index = index;
+ cable->attrs[0] = &cable->attr_name.attr;
+ cable->attrs[1] = &cable->attr_state.attr;
+ cable->attrs[2] = NULL;
+ cable->attr_g.name = str;
+ cable->attr_g.attrs = cable->attrs;
+
+ sysfs_attr_init(&cable->attr_name.attr);
+ cable->attr_name.attr.name = "name";
+ cable->attr_name.attr.mode = 0444;
+ cable->attr_name.show = cable_name_show;
+
+ sysfs_attr_init(&cable->attr_state.attr);
+ cable->attr_state.attr.name = "state";
+ cable->attr_state.attr.mode = 0444;
+ cable->attr_state.show = cable_state_show;
+ }
+ }
+
+ if (edev->max_supported && edev->mutually_exclusive) {
+ char buf[80];
+ char *name;
+
+ /* Count the size of mutually_exclusive array */
+ for (index = 0; edev->mutually_exclusive[index]; index++)
+ ;
+
+ edev->attrs_muex = kcalloc(index + 1,
+ sizeof(struct attribute *),
+ GFP_KERNEL);
+ if (!edev->attrs_muex) {
+ ret = -ENOMEM;
+ goto err_muex;
+ }
+
+ edev->d_attrs_muex = kcalloc(index,
+ sizeof(struct device_attribute),
+ GFP_KERNEL);
+ if (!edev->d_attrs_muex) {
+ ret = -ENOMEM;
+ kfree(edev->attrs_muex);
+ goto err_muex;
+ }
+
+ for (index = 0; edev->mutually_exclusive[index]; index++) {
+ sprintf(buf, "0x%x", edev->mutually_exclusive[index]);
+ name = kzalloc(strlen(buf) + 1,
+ GFP_KERNEL);
+ if (!name) {
+ for (index--; index >= 0; index--) {
+ kfree(edev->d_attrs_muex[index].attr.
+ name);
+ }
+ kfree(edev->d_attrs_muex);
+ kfree(edev->attrs_muex);
+ ret = -ENOMEM;
+ goto err_muex;
+ }
+ strcpy(name, buf);
+ sysfs_attr_init(&edev->d_attrs_muex[index].attr);
+ edev->d_attrs_muex[index].attr.name = name;
+ edev->d_attrs_muex[index].attr.mode = 0000;
+ edev->attrs_muex[index] = &edev->d_attrs_muex[index]
+ .attr;
+ }
+ edev->attr_g_muex.name = muex_name;
+ edev->attr_g_muex.attrs = edev->attrs_muex;
+
+ }
+
+ if (edev->max_supported) {
+ edev->extcon_dev_type.groups =
+ kcalloc(edev->max_supported + 2,
+ sizeof(struct attribute_group *),
+ GFP_KERNEL);
+ if (!edev->extcon_dev_type.groups) {
+ ret = -ENOMEM;
+ goto err_alloc_groups;
+ }
+
+ edev->extcon_dev_type.name = dev_name(&edev->dev);
+ edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+
+ for (index = 0; index < edev->max_supported; index++)
+ edev->extcon_dev_type.groups[index] =
+ &edev->cables[index].attr_g;
+ if (edev->mutually_exclusive)
+ edev->extcon_dev_type.groups[index] =
+ &edev->attr_g_muex;
+
+ edev->dev.type = &edev->extcon_dev_type;
+ }
+
+ ret = device_register(&edev->dev);
+ if (ret) {
+ put_device(&edev->dev);
+ goto err_dev;
+ }
+
+ spin_lock_init(&edev->lock);
+ edev->nh = devm_kcalloc(&edev->dev, edev->max_supported,
+ sizeof(*edev->nh), GFP_KERNEL);
+ if (!edev->nh) {
+ ret = -ENOMEM;
+ goto err_dev;
+ }
+
+ for (index = 0; index < edev->max_supported; index++)
+ RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]);
+
+ RAW_INIT_NOTIFIER_HEAD(&edev->nh_all);
+
+ dev_set_drvdata(&edev->dev, edev);
+ edev->state = 0;
+
+ mutex_lock(&extcon_dev_list_lock);
+ list_add(&edev->entry, &extcon_dev_list);
+ mutex_unlock(&extcon_dev_list_lock);
+
+ return 0;
+
+err_dev:
+ if (edev->max_supported)
+ kfree(edev->extcon_dev_type.groups);
+err_alloc_groups:
+ if (edev->max_supported && edev->mutually_exclusive) {
+ for (index = 0; edev->mutually_exclusive[index]; index++)
+ kfree(edev->d_attrs_muex[index].attr.name);
+ kfree(edev->d_attrs_muex);
+ kfree(edev->attrs_muex);
+ }
+err_muex:
+ for (index = 0; index < edev->max_supported; index++)
+ kfree(edev->cables[index].attr_g.name);
+err_alloc_cables:
+ if (edev->max_supported)
+ kfree(edev->cables);
+err_sysfs_alloc:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(extcon_dev_register);
+
+/**
+ * extcon_dev_unregister() - Unregister the extcon device.
+ * @edev: the extcon device to be unregistered.
+ *
+ * Note that this does not call kfree(edev) because edev was not allocated
+ * by this class.
+ */
+void extcon_dev_unregister(struct extcon_dev *edev)
+{
+ int index;
+
+ if (!edev)
+ return;
+
+ mutex_lock(&extcon_dev_list_lock);
+ list_del(&edev->entry);
+ mutex_unlock(&extcon_dev_list_lock);
+
+ if (IS_ERR_OR_NULL(get_device(&edev->dev))) {
+ dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n",
+ dev_name(&edev->dev));
+ return;
+ }
+
+ device_unregister(&edev->dev);
+
+ if (edev->mutually_exclusive && edev->max_supported) {
+ for (index = 0; edev->mutually_exclusive[index];
+ index++)
+ kfree(edev->d_attrs_muex[index].attr.name);
+ kfree(edev->d_attrs_muex);
+ kfree(edev->attrs_muex);
+ }
+
+ for (index = 0; index < edev->max_supported; index++)
+ kfree(edev->cables[index].attr_g.name);
+
+ if (edev->max_supported) {
+ kfree(edev->extcon_dev_type.groups);
+ kfree(edev->cables);
+ }
+
+ put_device(&edev->dev);
+}
+EXPORT_SYMBOL_GPL(extcon_dev_unregister);
+
+#ifdef CONFIG_OF
+
+/*
+ * extcon_find_edev_by_node - Find the extcon device from devicetree.
+ * @node : OF node identifying edev
+ *
+ * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
+ */
+struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
+{
+ struct extcon_dev *edev;
+
+ mutex_lock(&extcon_dev_list_lock);
+ list_for_each_entry(edev, &extcon_dev_list, entry)
+ if (edev->dev.parent && edev->dev.parent->of_node == node)
+ goto out;
+ edev = ERR_PTR(-EPROBE_DEFER);
+out:
+ mutex_unlock(&extcon_dev_list_lock);
+
+ return edev;
+}
+
+/*
+ * extcon_get_edev_by_phandle - Get the extcon device from devicetree.
+ * @dev : the instance to the given device
+ * @index : the index into list of extcon_dev
+ *
+ * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
+ */
+struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
+{
+ struct device_node *node;
+ struct extcon_dev *edev;
+
+ if (!dev)
+ return ERR_PTR(-EINVAL);
+
+ if (!dev->of_node) {
+ dev_dbg(dev, "device does not have a device node entry\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ node = of_parse_phandle(dev->of_node, "extcon", index);
+ if (!node) {
+ dev_dbg(dev, "failed to get phandle in %pOF node\n",
+ dev->of_node);
+ return ERR_PTR(-ENODEV);
+ }
+
+ edev = extcon_find_edev_by_node(node);
+ of_node_put(node);
+
+ return edev;
+}
+
+#else
+
+struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+#endif /* CONFIG_OF */
+
+EXPORT_SYMBOL_GPL(extcon_find_edev_by_node);
+EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle);
+
+/**
+ * extcon_get_edev_name() - Get the name of the extcon device.
+ * @edev: the extcon device
+ */
+const char *extcon_get_edev_name(struct extcon_dev *edev)
+{
+ return !edev ? NULL : edev->name;
+}
+
+static int __init extcon_class_init(void)
+{
+ return create_extcon_class();
+}
+module_init(extcon_class_init);
+
+static void __exit extcon_class_exit(void)
+{
+ class_destroy(extcon_class);
+}
+module_exit(extcon_class_exit);
+
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_DESCRIPTION("External Connector (extcon) framework");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h
new file mode 100644
index 0000000..93b5e03
--- /dev/null
+++ b/drivers/extcon/extcon.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_EXTCON_INTERNAL_H__
+#define __LINUX_EXTCON_INTERNAL_H__
+
+#include <linux/extcon-provider.h>
+
+/**
+ * struct extcon_dev - An extcon device represents one external connector.
+ * @name: The name of this extcon device. Parent device name is
+ * used if NULL.
+ * @supported_cable: Array of supported cable names ending with EXTCON_NONE.
+ * If supported_cable is NULL, cable name related APIs
+ * are disabled.
+ * @mutually_exclusive: Array of mutually exclusive set of cables that cannot
+ * be attached simultaneously. The array should be
+ * ending with NULL or be NULL (no mutually exclusive
+ * cables). For example, if it is { 0x7, 0x30, 0}, then,
+ * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
+ * be attached simulataneously. {0x7, 0} is equivalent to
+ * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
+ * can be no simultaneous connections.
+ * @dev: Device of this extcon.
+ * @state: Attach/detach state of this extcon. Do not provide at
+ * register-time.
+ * @nh_all: Notifier for the state change events for all supported
+ * external connectors from this extcon.
+ * @nh: Notifier for the state change events from this extcon
+ * @entry: To support list of extcon devices so that users can
+ * search for extcon devices based on the extcon name.
+ * @lock:
+ * @max_supported: Internal value to store the number of cables.
+ * @extcon_dev_type: Device_type struct to provide attribute_groups
+ * customized for each extcon device.
+ * @cables: Sysfs subdirectories. Each represents one cable.
+ *
+ * In most cases, users only need to provide "User initializing data" of
+ * this struct when registering an extcon. In some exceptional cases,
+ * optional callbacks may be needed. However, the values in "internal data"
+ * are overwritten by register function.
+ */
+struct extcon_dev {
+ /* Optional user initializing data */
+ const char *name;
+ const unsigned int *supported_cable;
+ const u32 *mutually_exclusive;
+
+ /* Internal data. Please do not set. */
+ struct device dev;
+ struct raw_notifier_head nh_all;
+ struct raw_notifier_head *nh;
+ struct list_head entry;
+ int max_supported;
+ spinlock_t lock; /* could be called by irq handler */
+ u32 state;
+
+ /* /sys/class/extcon/.../cable.n/... */
+ struct device_type extcon_dev_type;
+ struct extcon_cable *cables;
+
+ /* /sys/class/extcon/.../mutually_exclusive/... */
+ struct attribute_group attr_g_muex;
+ struct attribute **attrs_muex;
+ struct device_attribute *d_attrs_muex;
+};
+
+#endif /* __LINUX_EXTCON_INTERNAL_H__ */