v4.19.13 snapshot.
diff --git a/drivers/phy/motorola/phy-cpcap-usb.c b/drivers/phy/motorola/phy-cpcap-usb.c
new file mode 100644
index 0000000..6601ad0
--- /dev/null
+++ b/drivers/phy/motorola/phy-cpcap-usb.c
@@ -0,0 +1,676 @@
+/*
+ * Motorola CPCAP PMIC USB PHY driver
+ * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
+ *
+ * Some parts based on earlier Motorola Linux kernel tree code in
+ * board-mapphone-usb.c and cpcap-usb-det.c:
+ * Copyright (C) 2007 - 2011 Motorola, Inc.
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/iio/consumer.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/motorola-cpcap.h>
+#include <linux/phy/omap_usb.h>
+#include <linux/phy/phy.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/musb.h>
+
+/* CPCAP_REG_USBC1 register bits */
+#define CPCAP_BIT_IDPULSE BIT(15)
+#define CPCAP_BIT_ID100KPU BIT(14)
+#define CPCAP_BIT_IDPUCNTRL BIT(13)
+#define CPCAP_BIT_IDPU BIT(12)
+#define CPCAP_BIT_IDPD BIT(11)
+#define CPCAP_BIT_VBUSCHRGTMR3 BIT(10)
+#define CPCAP_BIT_VBUSCHRGTMR2 BIT(9)
+#define CPCAP_BIT_VBUSCHRGTMR1 BIT(8)
+#define CPCAP_BIT_VBUSCHRGTMR0 BIT(7)
+#define CPCAP_BIT_VBUSPU BIT(6)
+#define CPCAP_BIT_VBUSPD BIT(5)
+#define CPCAP_BIT_DMPD BIT(4)
+#define CPCAP_BIT_DPPD BIT(3)
+#define CPCAP_BIT_DM1K5PU BIT(2)
+#define CPCAP_BIT_DP1K5PU BIT(1)
+#define CPCAP_BIT_DP150KPU BIT(0)
+
+/* CPCAP_REG_USBC2 register bits */
+#define CPCAP_BIT_ZHSDRV1 BIT(15)
+#define CPCAP_BIT_ZHSDRV0 BIT(14)
+#define CPCAP_BIT_DPLLCLKREQ BIT(13)
+#define CPCAP_BIT_SE0CONN BIT(12)
+#define CPCAP_BIT_UARTTXTRI BIT(11)
+#define CPCAP_BIT_UARTSWAP BIT(10)
+#define CPCAP_BIT_UARTMUX1 BIT(9)
+#define CPCAP_BIT_UARTMUX0 BIT(8)
+#define CPCAP_BIT_ULPISTPLOW BIT(7)
+#define CPCAP_BIT_TXENPOL BIT(6)
+#define CPCAP_BIT_USBXCVREN BIT(5)
+#define CPCAP_BIT_USBCNTRL BIT(4)
+#define CPCAP_BIT_USBSUSPEND BIT(3)
+#define CPCAP_BIT_EMUMODE2 BIT(2)
+#define CPCAP_BIT_EMUMODE1 BIT(1)
+#define CPCAP_BIT_EMUMODE0 BIT(0)
+
+/* CPCAP_REG_USBC3 register bits */
+#define CPCAP_BIT_SPARE_898_15 BIT(15)
+#define CPCAP_BIT_IHSTX03 BIT(14)
+#define CPCAP_BIT_IHSTX02 BIT(13)
+#define CPCAP_BIT_IHSTX01 BIT(12)
+#define CPCAP_BIT_IHSTX0 BIT(11)
+#define CPCAP_BIT_IDPU_SPI BIT(10)
+#define CPCAP_BIT_UNUSED_898_9 BIT(9)
+#define CPCAP_BIT_VBUSSTBY_EN BIT(8)
+#define CPCAP_BIT_VBUSEN_SPI BIT(7)
+#define CPCAP_BIT_VBUSPU_SPI BIT(6)
+#define CPCAP_BIT_VBUSPD_SPI BIT(5)
+#define CPCAP_BIT_DMPD_SPI BIT(4)
+#define CPCAP_BIT_DPPD_SPI BIT(3)
+#define CPCAP_BIT_SUSPEND_SPI BIT(2)
+#define CPCAP_BIT_PU_SPI BIT(1)
+#define CPCAP_BIT_ULPI_SPI_SEL BIT(0)
+
+struct cpcap_usb_ints_state {
+ bool id_ground;
+ bool id_float;
+ bool chrg_det;
+ bool rvrs_chrg;
+ bool vbusov;
+
+ bool chrg_se1b;
+ bool se0conn;
+ bool rvrs_mode;
+ bool chrgcurr1;
+ bool vbusvld;
+ bool sessvld;
+ bool sessend;
+ bool se1;
+
+ bool battdetb;
+ bool dm;
+ bool dp;
+};
+
+enum cpcap_gpio_mode {
+ CPCAP_DM_DP,
+ CPCAP_MDM_RX_TX,
+ CPCAP_UNKNOWN,
+ CPCAP_OTG_DM_DP,
+};
+
+struct cpcap_phy_ddata {
+ struct regmap *reg;
+ struct device *dev;
+ struct clk *refclk;
+ struct usb_phy phy;
+ struct delayed_work detect_work;
+ struct pinctrl *pins;
+ struct pinctrl_state *pins_ulpi;
+ struct pinctrl_state *pins_utmi;
+ struct pinctrl_state *pins_uart;
+ struct gpio_desc *gpio[2];
+ struct iio_channel *vbus;
+ struct iio_channel *id;
+ struct regulator *vusb;
+ atomic_t active;
+};
+
+static bool cpcap_usb_vbus_valid(struct cpcap_phy_ddata *ddata)
+{
+ int error, value = 0;
+
+ error = iio_read_channel_processed(ddata->vbus, &value);
+ if (error >= 0)
+ return value > 3900 ? true : false;
+
+ dev_err(ddata->dev, "error reading VBUS: %i\n", error);
+
+ return false;
+}
+
+static int cpcap_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ otg->host = host;
+ if (!host)
+ otg->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int cpcap_usb_phy_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ otg->gadget = gadget;
+ if (!gadget)
+ otg->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .owner = THIS_MODULE,
+};
+
+static int cpcap_phy_get_ints_state(struct cpcap_phy_ddata *ddata,
+ struct cpcap_usb_ints_state *s)
+{
+ int val, error;
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
+ if (error)
+ return error;
+
+ s->id_ground = val & BIT(15);
+ s->id_float = val & BIT(14);
+ s->vbusov = val & BIT(11);
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
+ if (error)
+ return error;
+
+ s->vbusvld = val & BIT(3);
+ s->sessvld = val & BIT(2);
+ s->sessend = val & BIT(1);
+ s->se1 = val & BIT(0);
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
+ if (error)
+ return error;
+
+ s->dm = val & BIT(1);
+ s->dp = val & BIT(0);
+
+ return 0;
+}
+
+static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata);
+static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata);
+
+static void cpcap_usb_detect(struct work_struct *work)
+{
+ struct cpcap_phy_ddata *ddata;
+ struct cpcap_usb_ints_state s;
+ bool vbus = false;
+ int error;
+
+ ddata = container_of(work, struct cpcap_phy_ddata, detect_work.work);
+
+ error = cpcap_phy_get_ints_state(ddata, &s);
+ if (error)
+ return;
+
+ if (s.id_ground) {
+ dev_dbg(ddata->dev, "id ground, USB host mode\n");
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+
+ error = musb_mailbox(MUSB_ID_GROUND);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_VBUSSTBY_EN,
+ CPCAP_BIT_VBUSSTBY_EN);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_VBUSSTBY_EN, 0);
+ if (error)
+ goto out_err;
+
+ vbus = cpcap_usb_vbus_valid(ddata);
+
+ if (vbus) {
+ /* Are we connected to a docking station with vbus? */
+ if (s.id_ground) {
+ dev_dbg(ddata->dev, "connected to a dock\n");
+
+ /* No VBUS needed with docks */
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+ error = musb_mailbox(MUSB_ID_GROUND);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ /* Otherwise assume we're connected to a USB host */
+ dev_dbg(ddata->dev, "connected to USB host\n");
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+ error = musb_mailbox(MUSB_VBUS_VALID);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ /* Default to debug UART mode */
+ error = cpcap_usb_set_uart_mode(ddata);
+ if (error)
+ goto out_err;
+
+ error = musb_mailbox(MUSB_VBUS_OFF);
+ if (error)
+ goto out_err;
+
+ dev_dbg(ddata->dev, "set UART mode\n");
+
+ return;
+
+out_err:
+ dev_err(ddata->dev, "error setting cable state: %i\n", error);
+}
+
+static irqreturn_t cpcap_phy_irq_thread(int irq, void *data)
+{
+ struct cpcap_phy_ddata *ddata = data;
+
+ if (!atomic_read(&ddata->active))
+ return IRQ_NONE;
+
+ schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));
+
+ return IRQ_HANDLED;
+}
+
+static int cpcap_usb_init_irq(struct platform_device *pdev,
+ struct cpcap_phy_ddata *ddata,
+ const char *name)
+{
+ int irq, error;
+
+ irq = platform_get_irq_byname(pdev, name);
+ if (irq < 0)
+ return -ENODEV;
+
+ error = devm_request_threaded_irq(ddata->dev, irq, NULL,
+ cpcap_phy_irq_thread,
+ IRQF_SHARED,
+ name, ddata);
+ if (error) {
+ dev_err(ddata->dev, "could not get irq %s: %i\n",
+ name, error);
+
+ return error;
+ }
+
+ return 0;
+}
+
+static const char * const cpcap_phy_irqs[] = {
+ /* REG_INT_0 */
+ "id_ground", "id_float",
+
+ /* REG_INT1 */
+ "se0conn", "vbusvld", "sessvld", "sessend", "se1",
+
+ /* REG_INT_3 */
+ "dm", "dp",
+};
+
+static int cpcap_usb_init_interrupts(struct platform_device *pdev,
+ struct cpcap_phy_ddata *ddata)
+{
+ int i, error;
+
+ for (i = 0; i < ARRAY_SIZE(cpcap_phy_irqs); i++) {
+ error = cpcap_usb_init_irq(pdev, ddata, cpcap_phy_irqs[i]);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+/*
+ * Optional pins and modes. At least Motorola mapphone devices
+ * are using two GPIOs and dynamic pinctrl to multiplex PHY pins
+ * to UART, ULPI or UTMI mode.
+ */
+
+static int cpcap_usb_gpio_set_mode(struct cpcap_phy_ddata *ddata,
+ enum cpcap_gpio_mode mode)
+{
+ if (!ddata->gpio[0] || !ddata->gpio[1])
+ return 0;
+
+ gpiod_set_value(ddata->gpio[0], mode & 1);
+ gpiod_set_value(ddata->gpio[1], mode >> 1);
+
+ return 0;
+}
+
+static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata)
+{
+ int error;
+
+ error = cpcap_usb_gpio_set_mode(ddata, CPCAP_DM_DP);
+ if (error)
+ goto out_err;
+
+ if (ddata->pins_uart) {
+ error = pinctrl_select_state(ddata->pins, ddata->pins_uart);
+ if (error)
+ goto out_err;
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,
+ CPCAP_BIT_VBUSPD,
+ CPCAP_BIT_VBUSPD);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ 0xffff, CPCAP_BIT_UARTMUX0 |
+ CPCAP_BIT_EMUMODE0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff,
+ CPCAP_BIT_IDPU_SPI);
+ if (error)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
+
+ return error;
+}
+
+static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata)
+{
+ int error;
+
+ error = cpcap_usb_gpio_set_mode(ddata, CPCAP_OTG_DM_DP);
+ if (error)
+ return error;
+
+ if (ddata->pins_utmi) {
+ error = pinctrl_select_state(ddata->pins, ddata->pins_utmi);
+ if (error) {
+ dev_err(ddata->dev, "could not set usb mode: %i\n",
+ error);
+
+ return error;
+ }
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,
+ CPCAP_BIT_VBUSPD, 0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ CPCAP_BIT_USBXCVREN,
+ CPCAP_BIT_USBXCVREN);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_PU_SPI |
+ CPCAP_BIT_DMPD_SPI |
+ CPCAP_BIT_DPPD_SPI |
+ CPCAP_BIT_SUSPEND_SPI |
+ CPCAP_BIT_ULPI_SPI_SEL, 0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ CPCAP_BIT_USBXCVREN,
+ CPCAP_BIT_USBXCVREN);
+ if (error)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
+
+ return error;
+}
+
+static int cpcap_usb_init_optional_pins(struct cpcap_phy_ddata *ddata)
+{
+ ddata->pins = devm_pinctrl_get(ddata->dev);
+ if (IS_ERR(ddata->pins)) {
+ dev_info(ddata->dev, "default pins not configured: %ld\n",
+ PTR_ERR(ddata->pins));
+ ddata->pins = NULL;
+
+ return 0;
+ }
+
+ ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi");
+ if (IS_ERR(ddata->pins_ulpi)) {
+ dev_info(ddata->dev, "ulpi pins not configured\n");
+ ddata->pins_ulpi = NULL;
+ }
+
+ ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi");
+ if (IS_ERR(ddata->pins_utmi)) {
+ dev_info(ddata->dev, "utmi pins not configured\n");
+ ddata->pins_utmi = NULL;
+ }
+
+ ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart");
+ if (IS_ERR(ddata->pins_uart)) {
+ dev_info(ddata->dev, "uart pins not configured\n");
+ ddata->pins_uart = NULL;
+ }
+
+ if (ddata->pins_uart)
+ return pinctrl_select_state(ddata->pins, ddata->pins_uart);
+
+ return 0;
+}
+
+static void cpcap_usb_init_optional_gpios(struct cpcap_phy_ddata *ddata)
+{
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
+ i, GPIOD_OUT_HIGH);
+ if (IS_ERR(ddata->gpio[i])) {
+ dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
+ i, PTR_ERR(ddata->gpio[i]));
+ ddata->gpio[i] = NULL;
+ }
+ }
+}
+
+static int cpcap_usb_init_iio(struct cpcap_phy_ddata *ddata)
+{
+ enum iio_chan_type type;
+ int error;
+
+ ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus");
+ if (IS_ERR(ddata->vbus)) {
+ error = PTR_ERR(ddata->vbus);
+ goto out_err;
+ }
+
+ if (!ddata->vbus->indio_dev) {
+ error = -ENXIO;
+ goto out_err;
+ }
+
+ error = iio_get_channel_type(ddata->vbus, &type);
+ if (error < 0)
+ goto out_err;
+
+ if (type != IIO_VOLTAGE) {
+ error = -EINVAL;
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+ error);
+
+ return error;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id cpcap_usb_phy_id_table[] = {
+ {
+ .compatible = "motorola,cpcap-usb-phy",
+ },
+ {
+ .compatible = "motorola,mapphone-cpcap-usb-phy",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cpcap_usb_phy_id_table);
+#endif
+
+static int cpcap_usb_phy_probe(struct platform_device *pdev)
+{
+ struct cpcap_phy_ddata *ddata;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct usb_otg *otg;
+ const struct of_device_id *of_id;
+ int error;
+
+ of_id = of_match_device(of_match_ptr(cpcap_usb_phy_id_table),
+ &pdev->dev);
+ if (!of_id)
+ return -EINVAL;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!ddata->reg)
+ return -ENODEV;
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ ddata->dev = &pdev->dev;
+ ddata->phy.dev = ddata->dev;
+ ddata->phy.label = "cpcap_usb_phy";
+ ddata->phy.otg = otg;
+ ddata->phy.type = USB_PHY_TYPE_USB2;
+ otg->set_host = cpcap_usb_phy_set_host;
+ otg->set_peripheral = cpcap_usb_phy_set_peripheral;
+ otg->usb_phy = &ddata->phy;
+ INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
+ platform_set_drvdata(pdev, ddata);
+
+ ddata->vusb = devm_regulator_get(&pdev->dev, "vusb");
+ if (IS_ERR(ddata->vusb))
+ return PTR_ERR(ddata->vusb);
+
+ error = regulator_enable(ddata->vusb);
+ if (error)
+ return error;
+
+ generic_phy = devm_phy_create(ddata->dev, NULL, &ops);
+ if (IS_ERR(generic_phy)) {
+ error = PTR_ERR(generic_phy);
+ return PTR_ERR(generic_phy);
+ }
+
+ phy_set_drvdata(generic_phy, ddata);
+
+ phy_provider = devm_of_phy_provider_register(ddata->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ error = cpcap_usb_init_optional_pins(ddata);
+ if (error)
+ return error;
+
+ cpcap_usb_init_optional_gpios(ddata);
+
+ error = cpcap_usb_init_iio(ddata);
+ if (error)
+ return error;
+
+ error = cpcap_usb_init_interrupts(pdev, ddata);
+ if (error)
+ return error;
+
+ usb_add_phy_dev(&ddata->phy);
+ atomic_set(&ddata->active, 1);
+ schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));
+
+ return 0;
+}
+
+static int cpcap_usb_phy_remove(struct platform_device *pdev)
+{
+ struct cpcap_phy_ddata *ddata = platform_get_drvdata(pdev);
+ int error;
+
+ atomic_set(&ddata->active, 0);
+ error = cpcap_usb_set_uart_mode(ddata);
+ if (error)
+ dev_err(ddata->dev, "could not set UART mode\n");
+
+ error = musb_mailbox(MUSB_VBUS_OFF);
+ if (error)
+ dev_err(ddata->dev, "could not set mailbox\n");
+
+ usb_remove_phy(&ddata->phy);
+ cancel_delayed_work_sync(&ddata->detect_work);
+ clk_unprepare(ddata->refclk);
+ regulator_disable(ddata->vusb);
+
+ return 0;
+}
+
+static struct platform_driver cpcap_usb_phy_driver = {
+ .probe = cpcap_usb_phy_probe,
+ .remove = cpcap_usb_phy_remove,
+ .driver = {
+ .name = "cpcap-usb-phy",
+ .of_match_table = of_match_ptr(cpcap_usb_phy_id_table),
+ },
+};
+
+module_platform_driver(cpcap_usb_phy_driver);
+
+MODULE_ALIAS("platform:cpcap_usb");
+MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
+MODULE_DESCRIPTION("CPCAP usb phy driver");
+MODULE_LICENSE("GPL v2");