v4.19.13 snapshot.
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
new file mode 100644
index 0000000..a7dc286
--- /dev/null
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -0,0 +1,480 @@
+/*
+ * OMAP4 Keypad Driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ *
+ * Author: Abraham Arce <x0066660@ti.com>
+ * Initial Code: Syed Rafiuddin <rafiuddin.syed@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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/input.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+
+/* OMAP4 registers */
+#define OMAP4_KBD_REVISION 0x00
+#define OMAP4_KBD_SYSCONFIG 0x10
+#define OMAP4_KBD_SYSSTATUS 0x14
+#define OMAP4_KBD_IRQSTATUS 0x18
+#define OMAP4_KBD_IRQENABLE 0x1C
+#define OMAP4_KBD_WAKEUPENABLE 0x20
+#define OMAP4_KBD_PENDING 0x24
+#define OMAP4_KBD_CTRL 0x28
+#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
+#define OMAP4_KBD_LONGKEYTIME 0x30
+#define OMAP4_KBD_TIMEOUT 0x34
+#define OMAP4_KBD_STATEMACHINE 0x38
+#define OMAP4_KBD_ROWINPUTS 0x3C
+#define OMAP4_KBD_COLUMNOUTPUTS 0x40
+#define OMAP4_KBD_FULLCODE31_0 0x44
+#define OMAP4_KBD_FULLCODE63_32 0x48
+
+/* OMAP4 bit definitions */
+#define OMAP4_DEF_IRQENABLE_EVENTEN BIT(0)
+#define OMAP4_DEF_IRQENABLE_LONGKEY BIT(1)
+#define OMAP4_DEF_WUP_EVENT_ENA BIT(0)
+#define OMAP4_DEF_WUP_LONG_KEY_ENA BIT(1)
+#define OMAP4_DEF_CTRL_NOSOFTMODE BIT(1)
+#define OMAP4_DEF_CTRL_PTV_SHIFT 2
+
+/* OMAP4 values */
+#define OMAP4_VAL_IRQDISABLE 0x0
+
+/*
+ * Errata i689: If a key is released for a time shorter than debounce time,
+ * the keyboard will idle and never detect the key release. The workaround
+ * is to use at least a 12ms debounce time. See omap5432 TRM chapter
+ * "26.4.6.2 Keyboard Controller Timer" for more information.
+ */
+#define OMAP4_KEYPAD_PTV_DIV_128 0x6
+#define OMAP4_KEYPAD_DEBOUNCINGTIME_MS(dbms, ptv) \
+ ((((dbms) * 1000) / ((1 << ((ptv) + 1)) * (1000000 / 32768))) - 1)
+#define OMAP4_VAL_DEBOUNCINGTIME_16MS \
+ OMAP4_KEYPAD_DEBOUNCINGTIME_MS(16, OMAP4_KEYPAD_PTV_DIV_128)
+
+enum {
+ KBD_REVISION_OMAP4 = 0,
+ KBD_REVISION_OMAP5,
+};
+
+struct omap4_keypad {
+ struct input_dev *input;
+
+ void __iomem *base;
+ bool irq_wake_enabled;
+ unsigned int irq;
+
+ unsigned int rows;
+ unsigned int cols;
+ u32 reg_offset;
+ u32 irqreg_offset;
+ unsigned int row_shift;
+ bool no_autorepeat;
+ unsigned char key_state[8];
+ unsigned short *keymap;
+};
+
+static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
+{
+ return __raw_readl(keypad_data->base +
+ keypad_data->reg_offset + offset);
+}
+
+static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
+{
+ __raw_writel(value,
+ keypad_data->base + keypad_data->reg_offset + offset);
+}
+
+static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
+{
+ return __raw_readl(keypad_data->base +
+ keypad_data->irqreg_offset + offset);
+}
+
+static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
+ u32 offset, u32 value)
+{
+ __raw_writel(value,
+ keypad_data->base + keypad_data->irqreg_offset + offset);
+}
+
+
+/* Interrupt handlers */
+static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
+{
+ struct omap4_keypad *keypad_data = dev_id;
+
+ if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) {
+ /* Disable interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
+ OMAP4_VAL_IRQDISABLE);
+ return IRQ_WAKE_THREAD;
+ }
+
+ return IRQ_NONE;
+}
+
+static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
+{
+ struct omap4_keypad *keypad_data = dev_id;
+ struct input_dev *input_dev = keypad_data->input;
+ unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
+ unsigned int col, row, code, changed;
+ u32 *new_state = (u32 *) key_state;
+
+ *new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
+ *(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
+
+ for (row = 0; row < keypad_data->rows; row++) {
+ changed = key_state[row] ^ keypad_data->key_state[row];
+ if (!changed)
+ continue;
+
+ for (col = 0; col < keypad_data->cols; col++) {
+ if (changed & (1 << col)) {
+ code = MATRIX_SCAN_CODE(row, col,
+ keypad_data->row_shift);
+ input_event(input_dev, EV_MSC, MSC_SCAN, code);
+ input_report_key(input_dev,
+ keypad_data->keymap[code],
+ key_state[row] & (1 << col));
+ }
+ }
+ }
+
+ input_sync(input_dev);
+
+ memcpy(keypad_data->key_state, key_state,
+ sizeof(keypad_data->key_state));
+
+ /* clear pending interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
+ kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
+
+ /* enable interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
+ OMAP4_DEF_IRQENABLE_EVENTEN |
+ OMAP4_DEF_IRQENABLE_LONGKEY);
+
+ return IRQ_HANDLED;
+}
+
+static int omap4_keypad_open(struct input_dev *input)
+{
+ struct omap4_keypad *keypad_data = input_get_drvdata(input);
+
+ pm_runtime_get_sync(input->dev.parent);
+
+ disable_irq(keypad_data->irq);
+
+ kbd_writel(keypad_data, OMAP4_KBD_CTRL,
+ OMAP4_DEF_CTRL_NOSOFTMODE |
+ (OMAP4_KEYPAD_PTV_DIV_128 << OMAP4_DEF_CTRL_PTV_SHIFT));
+ kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
+ OMAP4_VAL_DEBOUNCINGTIME_16MS);
+ /* clear pending interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
+ kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
+ OMAP4_DEF_IRQENABLE_EVENTEN |
+ OMAP4_DEF_IRQENABLE_LONGKEY);
+ kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
+ OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);
+
+ enable_irq(keypad_data->irq);
+
+ return 0;
+}
+
+static void omap4_keypad_close(struct input_dev *input)
+{
+ struct omap4_keypad *keypad_data = input_get_drvdata(input);
+
+ disable_irq(keypad_data->irq);
+
+ /* Disable interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
+ OMAP4_VAL_IRQDISABLE);
+
+ /* clear pending interrupts */
+ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
+ kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
+
+ enable_irq(keypad_data->irq);
+
+ pm_runtime_put_sync(input->dev.parent);
+}
+
+static int omap4_keypad_parse_dt(struct device *dev,
+ struct omap4_keypad *keypad_data)
+{
+ struct device_node *np = dev->of_node;
+ int err;
+
+ err = matrix_keypad_parse_properties(dev, &keypad_data->rows,
+ &keypad_data->cols);
+ if (err)
+ return err;
+
+ if (of_get_property(np, "linux,input-no-autorepeat", NULL))
+ keypad_data->no_autorepeat = true;
+
+ return 0;
+}
+
+static int omap4_keypad_probe(struct platform_device *pdev)
+{
+ struct omap4_keypad *keypad_data;
+ struct input_dev *input_dev;
+ struct resource *res;
+ unsigned int max_keys;
+ int rev;
+ int irq;
+ int error;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no base address specified\n");
+ return -EINVAL;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (!irq) {
+ dev_err(&pdev->dev, "no keyboard irq assigned\n");
+ return -EINVAL;
+ }
+
+ keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
+ if (!keypad_data) {
+ dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
+ return -ENOMEM;
+ }
+
+ keypad_data->irq = irq;
+
+ error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
+ if (error)
+ goto err_free_keypad;
+
+ res = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!res) {
+ dev_err(&pdev->dev, "can't request mem region\n");
+ error = -EBUSY;
+ goto err_free_keypad;
+ }
+
+ keypad_data->base = ioremap(res->start, resource_size(res));
+ if (!keypad_data->base) {
+ dev_err(&pdev->dev, "can't ioremap mem resource\n");
+ error = -ENOMEM;
+ goto err_release_mem;
+ }
+
+
+ /*
+ * Enable clocks for the keypad module so that we can read
+ * revision register.
+ */
+ pm_runtime_enable(&pdev->dev);
+ error = pm_runtime_get_sync(&pdev->dev);
+ if (error) {
+ dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
+ goto err_unmap;
+ }
+ rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
+ rev &= 0x03 << 30;
+ rev >>= 30;
+ switch (rev) {
+ case KBD_REVISION_OMAP4:
+ keypad_data->reg_offset = 0x00;
+ keypad_data->irqreg_offset = 0x00;
+ break;
+ case KBD_REVISION_OMAP5:
+ keypad_data->reg_offset = 0x10;
+ keypad_data->irqreg_offset = 0x0c;
+ break;
+ default:
+ dev_err(&pdev->dev,
+ "Keypad reports unsupported revision %d", rev);
+ error = -EINVAL;
+ goto err_pm_put_sync;
+ }
+
+ /* input device allocation */
+ keypad_data->input = input_dev = input_allocate_device();
+ if (!input_dev) {
+ error = -ENOMEM;
+ goto err_pm_put_sync;
+ }
+
+ input_dev->name = pdev->name;
+ input_dev->dev.parent = &pdev->dev;
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0001;
+
+ input_dev->open = omap4_keypad_open;
+ input_dev->close = omap4_keypad_close;
+
+ input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+ if (!keypad_data->no_autorepeat)
+ __set_bit(EV_REP, input_dev->evbit);
+
+ input_set_drvdata(input_dev, keypad_data);
+
+ keypad_data->row_shift = get_count_order(keypad_data->cols);
+ max_keys = keypad_data->rows << keypad_data->row_shift;
+ keypad_data->keymap = kcalloc(max_keys,
+ sizeof(keypad_data->keymap[0]),
+ GFP_KERNEL);
+ if (!keypad_data->keymap) {
+ dev_err(&pdev->dev, "Not enough memory for keymap\n");
+ error = -ENOMEM;
+ goto err_free_input;
+ }
+
+ error = matrix_keypad_build_keymap(NULL, NULL,
+ keypad_data->rows, keypad_data->cols,
+ keypad_data->keymap, input_dev);
+ if (error) {
+ dev_err(&pdev->dev, "failed to build keymap\n");
+ goto err_free_keymap;
+ }
+
+ error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
+ omap4_keypad_irq_thread_fn, 0,
+ "omap4-keypad", keypad_data);
+ if (error) {
+ dev_err(&pdev->dev, "failed to register interrupt\n");
+ goto err_free_keymap;
+ }
+
+ device_init_wakeup(&pdev->dev, true);
+ pm_runtime_put_sync(&pdev->dev);
+
+ error = input_register_device(keypad_data->input);
+ if (error < 0) {
+ dev_err(&pdev->dev, "failed to register input device\n");
+ goto err_pm_disable;
+ }
+
+ platform_set_drvdata(pdev, keypad_data);
+ return 0;
+
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+ free_irq(keypad_data->irq, keypad_data);
+err_free_keymap:
+ kfree(keypad_data->keymap);
+err_free_input:
+ input_free_device(input_dev);
+err_pm_put_sync:
+ pm_runtime_put_sync(&pdev->dev);
+err_unmap:
+ iounmap(keypad_data->base);
+err_release_mem:
+ release_mem_region(res->start, resource_size(res));
+err_free_keypad:
+ kfree(keypad_data);
+ return error;
+}
+
+static int omap4_keypad_remove(struct platform_device *pdev)
+{
+ struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
+ struct resource *res;
+
+ free_irq(keypad_data->irq, keypad_data);
+
+ pm_runtime_disable(&pdev->dev);
+
+ input_unregister_device(keypad_data->input);
+
+ iounmap(keypad_data->base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(keypad_data->keymap);
+ kfree(keypad_data);
+
+ return 0;
+}
+
+static const struct of_device_id omap_keypad_dt_match[] = {
+ { .compatible = "ti,omap4-keypad" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int omap4_keypad_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
+ int error;
+
+ if (device_may_wakeup(&pdev->dev)) {
+ error = enable_irq_wake(keypad_data->irq);
+ if (!error)
+ keypad_data->irq_wake_enabled = true;
+ }
+
+ return 0;
+}
+
+static int omap4_keypad_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
+ disable_irq_wake(keypad_data->irq);
+ keypad_data->irq_wake_enabled = false;
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
+ omap4_keypad_suspend, omap4_keypad_resume);
+
+static struct platform_driver omap4_keypad_driver = {
+ .probe = omap4_keypad_probe,
+ .remove = omap4_keypad_remove,
+ .driver = {
+ .name = "omap4-keypad",
+ .pm = &omap4_keypad_pm_ops,
+ .of_match_table = omap_keypad_dt_match,
+ },
+};
+module_platform_driver(omap4_keypad_driver);
+
+MODULE_AUTHOR("Texas Instruments");
+MODULE_DESCRIPTION("OMAP4 Keypad Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:omap4-keypad");