[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/keyboard/spear-keyboard.c b/src/kernel/linux/v4.14/drivers/input/keyboard/spear-keyboard.c
new file mode 100644
index 0000000..7d25fa3
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/keyboard/spear-keyboard.c
@@ -0,0 +1,392 @@
+/*
+ * SPEAr Keyboard Driver
+ * Based on omap-keypad driver
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar <rajeevkumar.linux@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeup.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/platform_data/keyboard-spear.h>
+
+/* Keyboard Registers */
+#define MODE_CTL_REG 0x00
+#define STATUS_REG 0x0C
+#define DATA_REG 0x10
+#define INTR_MASK 0x54
+
+/* Register Values */
+#define NUM_ROWS 16
+#define NUM_COLS 16
+#define MODE_CTL_PCLK_FREQ_SHIFT 9
+#define MODE_CTL_PCLK_FREQ_MSK 0x7F
+
+#define MODE_CTL_KEYBOARD (0x2 << 0)
+#define MODE_CTL_SCAN_RATE_10 (0x0 << 2)
+#define MODE_CTL_SCAN_RATE_20 (0x1 << 2)
+#define MODE_CTL_SCAN_RATE_40 (0x2 << 2)
+#define MODE_CTL_SCAN_RATE_80 (0x3 << 2)
+#define MODE_CTL_KEYNUM_SHIFT 6
+#define MODE_CTL_START_SCAN (0x1 << 8)
+
+#define STATUS_DATA_AVAIL (0x1 << 1)
+
+#define DATA_ROW_MASK 0xF0
+#define DATA_COLUMN_MASK 0x0F
+
+#define ROW_SHIFT 4
+
+struct spear_kbd {
+ struct input_dev *input;
+ void __iomem *io_base;
+ struct clk *clk;
+ unsigned int irq;
+ unsigned int mode;
+ unsigned int suspended_rate;
+ unsigned short last_key;
+ unsigned short keycodes[NUM_ROWS * NUM_COLS];
+ bool rep;
+ bool irq_wake_enabled;
+ u32 mode_ctl_reg;
+};
+
+static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
+{
+ struct spear_kbd *kbd = dev_id;
+ struct input_dev *input = kbd->input;
+ unsigned int key;
+ u32 sts, val;
+
+ sts = readl_relaxed(kbd->io_base + STATUS_REG);
+ if (!(sts & STATUS_DATA_AVAIL))
+ return IRQ_NONE;
+
+ if (kbd->last_key != KEY_RESERVED) {
+ input_report_key(input, kbd->last_key, 0);
+ kbd->last_key = KEY_RESERVED;
+ }
+
+ /* following reads active (row, col) pair */
+ val = readl_relaxed(kbd->io_base + DATA_REG) &
+ (DATA_ROW_MASK | DATA_COLUMN_MASK);
+ key = kbd->keycodes[val];
+
+ input_event(input, EV_MSC, MSC_SCAN, val);
+ input_report_key(input, key, 1);
+ input_sync(input);
+
+ kbd->last_key = key;
+
+ /* clear interrupt */
+ writel_relaxed(0, kbd->io_base + STATUS_REG);
+
+ return IRQ_HANDLED;
+}
+
+static int spear_kbd_open(struct input_dev *dev)
+{
+ struct spear_kbd *kbd = input_get_drvdata(dev);
+ int error;
+ u32 val;
+
+ kbd->last_key = KEY_RESERVED;
+
+ error = clk_enable(kbd->clk);
+ if (error)
+ return error;
+
+ /* keyboard rate to be programmed is input clock (in MHz) - 1 */
+ val = clk_get_rate(kbd->clk) / 1000000 - 1;
+ val = (val & MODE_CTL_PCLK_FREQ_MSK) << MODE_CTL_PCLK_FREQ_SHIFT;
+
+ /* program keyboard */
+ val = MODE_CTL_SCAN_RATE_80 | MODE_CTL_KEYBOARD | val |
+ (kbd->mode << MODE_CTL_KEYNUM_SHIFT);
+ writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
+ writel_relaxed(1, kbd->io_base + STATUS_REG);
+
+ /* start key scan */
+ val = readl_relaxed(kbd->io_base + MODE_CTL_REG);
+ val |= MODE_CTL_START_SCAN;
+ writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
+
+ return 0;
+}
+
+static void spear_kbd_close(struct input_dev *dev)
+{
+ struct spear_kbd *kbd = input_get_drvdata(dev);
+ u32 val;
+
+ /* stop key scan */
+ val = readl_relaxed(kbd->io_base + MODE_CTL_REG);
+ val &= ~MODE_CTL_START_SCAN;
+ writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
+
+ clk_disable(kbd->clk);
+
+ kbd->last_key = KEY_RESERVED;
+}
+
+#ifdef CONFIG_OF
+static int spear_kbd_parse_dt(struct platform_device *pdev,
+ struct spear_kbd *kbd)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int error;
+ u32 val, suspended_rate;
+
+ if (!np) {
+ dev_err(&pdev->dev, "Missing DT data\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_bool(np, "autorepeat"))
+ kbd->rep = true;
+
+ if (of_property_read_u32(np, "suspended_rate", &suspended_rate))
+ kbd->suspended_rate = suspended_rate;
+
+ error = of_property_read_u32(np, "st,mode", &val);
+ if (error) {
+ dev_err(&pdev->dev, "DT: Invalid or missing mode\n");
+ return error;
+ }
+
+ kbd->mode = val;
+ return 0;
+}
+#else
+static inline int spear_kbd_parse_dt(struct platform_device *pdev,
+ struct spear_kbd *kbd)
+{
+ return -ENOSYS;
+}
+#endif
+
+static int spear_kbd_probe(struct platform_device *pdev)
+{
+ struct kbd_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ const struct matrix_keymap_data *keymap = pdata ? pdata->keymap : NULL;
+ struct spear_kbd *kbd;
+ struct input_dev *input_dev;
+ struct resource *res;
+ int irq;
+ int error;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "not able to get irq for the device\n");
+ return irq;
+ }
+
+ kbd = devm_kzalloc(&pdev->dev, sizeof(*kbd), GFP_KERNEL);
+ if (!kbd) {
+ dev_err(&pdev->dev, "not enough memory for driver data\n");
+ return -ENOMEM;
+ }
+
+ input_dev = devm_input_allocate_device(&pdev->dev);
+ if (!input_dev) {
+ dev_err(&pdev->dev, "unable to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ kbd->input = input_dev;
+ kbd->irq = irq;
+
+ if (!pdata) {
+ error = spear_kbd_parse_dt(pdev, kbd);
+ if (error)
+ return error;
+ } else {
+ kbd->mode = pdata->mode;
+ kbd->rep = pdata->rep;
+ kbd->suspended_rate = pdata->suspended_rate;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ kbd->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(kbd->io_base))
+ return PTR_ERR(kbd->io_base);
+
+ kbd->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(kbd->clk))
+ return PTR_ERR(kbd->clk);
+
+ input_dev->name = "Spear Keyboard";
+ input_dev->phys = "keyboard/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0100;
+ input_dev->open = spear_kbd_open;
+ input_dev->close = spear_kbd_close;
+
+ error = matrix_keypad_build_keymap(keymap, NULL, NUM_ROWS, NUM_COLS,
+ kbd->keycodes, input_dev);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to build keymap\n");
+ return error;
+ }
+
+ if (kbd->rep)
+ __set_bit(EV_REP, input_dev->evbit);
+ input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+ input_set_drvdata(input_dev, kbd);
+
+ error = devm_request_irq(&pdev->dev, irq, spear_kbd_interrupt, 0,
+ "keyboard", kbd);
+ if (error) {
+ dev_err(&pdev->dev, "request_irq failed\n");
+ return error;
+ }
+
+ error = clk_prepare(kbd->clk);
+ if (error)
+ return error;
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(&pdev->dev, "Unable to register keyboard device\n");
+ clk_unprepare(kbd->clk);
+ return error;
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+ platform_set_drvdata(pdev, kbd);
+
+ return 0;
+}
+
+static int spear_kbd_remove(struct platform_device *pdev)
+{
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+
+ input_unregister_device(kbd->input);
+ clk_unprepare(kbd->clk);
+
+ return 0;
+}
+
+static int __maybe_unused spear_kbd_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = kbd->input;
+ unsigned int rate = 0, mode_ctl_reg, val;
+
+ mutex_lock(&input_dev->mutex);
+
+ /* explicitly enable clock as we may program device */
+ clk_enable(kbd->clk);
+
+ mode_ctl_reg = readl_relaxed(kbd->io_base + MODE_CTL_REG);
+
+ if (device_may_wakeup(&pdev->dev)) {
+ if (!enable_irq_wake(kbd->irq))
+ kbd->irq_wake_enabled = true;
+
+ /*
+ * reprogram the keyboard operating frequency as on some
+ * platform it may change during system suspended
+ */
+ if (kbd->suspended_rate)
+ rate = kbd->suspended_rate / 1000000 - 1;
+ else
+ rate = clk_get_rate(kbd->clk) / 1000000 - 1;
+
+ val = mode_ctl_reg &
+ ~(MODE_CTL_PCLK_FREQ_MSK << MODE_CTL_PCLK_FREQ_SHIFT);
+ val |= (rate & MODE_CTL_PCLK_FREQ_MSK)
+ << MODE_CTL_PCLK_FREQ_SHIFT;
+ writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
+
+ } else {
+ if (input_dev->users) {
+ writel_relaxed(mode_ctl_reg & ~MODE_CTL_START_SCAN,
+ kbd->io_base + MODE_CTL_REG);
+ clk_disable(kbd->clk);
+ }
+ }
+
+ /* store current configuration */
+ if (input_dev->users)
+ kbd->mode_ctl_reg = mode_ctl_reg;
+
+ /* restore previous clk state */
+ clk_disable(kbd->clk);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static int __maybe_unused spear_kbd_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = kbd->input;
+
+ mutex_lock(&input_dev->mutex);
+
+ if (device_may_wakeup(&pdev->dev)) {
+ if (kbd->irq_wake_enabled) {
+ kbd->irq_wake_enabled = false;
+ disable_irq_wake(kbd->irq);
+ }
+ } else {
+ if (input_dev->users)
+ clk_enable(kbd->clk);
+ }
+
+ /* restore current configuration */
+ if (input_dev->users)
+ writel_relaxed(kbd->mode_ctl_reg, kbd->io_base + MODE_CTL_REG);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops, spear_kbd_suspend, spear_kbd_resume);
+
+#ifdef CONFIG_OF
+static const struct of_device_id spear_kbd_id_table[] = {
+ { .compatible = "st,spear300-kbd" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, spear_kbd_id_table);
+#endif
+
+static struct platform_driver spear_kbd_driver = {
+ .probe = spear_kbd_probe,
+ .remove = spear_kbd_remove,
+ .driver = {
+ .name = "keyboard",
+ .pm = &spear_kbd_pm_ops,
+ .of_match_table = of_match_ptr(spear_kbd_id_table),
+ },
+};
+module_platform_driver(spear_kbd_driver);
+
+MODULE_AUTHOR("Rajeev Kumar");
+MODULE_DESCRIPTION("SPEAr Keyboard Driver");
+MODULE_LICENSE("GPL");