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path: root/drivers/input/keyboard/ep93xx_keypad.c
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Diffstat (limited to 'drivers/input/keyboard/ep93xx_keypad.c')
-rw-r--r--drivers/input/keyboard/ep93xx_keypad.c150
1 files changed, 49 insertions, 101 deletions
diff --git a/drivers/input/keyboard/ep93xx_keypad.c b/drivers/input/keyboard/ep93xx_keypad.c
index 181d30e3018..e45740429f7 100644
--- a/drivers/input/keyboard/ep93xx_keypad.c
+++ b/drivers/input/keyboard/ep93xx_keypad.c
@@ -22,11 +22,11 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
-#include <linux/input.h>
#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/input/matrix_keypad.h>
#include <mach/hardware.h>
-#include <mach/gpio.h>
#include <mach/ep93xx_keypad.h>
/*
@@ -60,38 +60,37 @@
#define KEY_REG_KEY1_MASK (0x0000003f)
#define KEY_REG_KEY1_SHIFT (0)
-#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
-#define keypad_writel(v, off) __raw_writel((v), keypad->mmio_base + (off))
-
-#define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
+#define EP93XX_MATRIX_SIZE (EP93XX_MATRIX_ROWS * EP93XX_MATRIX_COLS)
struct ep93xx_keypad {
struct ep93xx_keypad_platform_data *pdata;
-
- struct clk *clk;
struct input_dev *input_dev;
+ struct clk *clk;
+
void __iomem *mmio_base;
- int irq;
- int enabled;
+ unsigned int matrix_keycodes[EP93XX_MATRIX_SIZE];
int key1;
int key2;
- unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
+ int irq;
+
+ bool enabled;
};
static void ep93xx_keypad_build_keycode(struct ep93xx_keypad *keypad)
{
struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
struct input_dev *input_dev = keypad->input_dev;
+ unsigned int *key;
int i;
- for (i = 0; i < pdata->matrix_key_map_size; i++) {
- unsigned int key = pdata->matrix_key_map[i];
- int row = (key >> 28) & 0xf;
- int col = (key >> 24) & 0xf;
- int code = key & 0xffffff;
+ key = &pdata->matrix_key_map[0];
+ for (i = 0; i < pdata->matrix_key_map_size; i++, key++) {
+ int row = KEY_ROW(*key);
+ int col = KEY_COL(*key);
+ int code = KEY_VAL(*key);
keypad->matrix_keycodes[(row << 3) + col] = code;
__set_bit(code, input_dev->keybit);
@@ -102,9 +101,11 @@ static irqreturn_t ep93xx_keypad_irq_handler(int irq, void *dev_id)
{
struct ep93xx_keypad *keypad = dev_id;
struct input_dev *input_dev = keypad->input_dev;
- unsigned int status = keypad_readl(KEY_REG);
+ unsigned int status;
int keycode, key1, key2;
+ status = __raw_readl(keypad->mmio_base + KEY_REG);
+
keycode = (status & KEY_REG_KEY1_MASK) >> KEY_REG_KEY1_SHIFT;
key1 = keypad->matrix_keycodes[keycode];
@@ -152,7 +153,10 @@ static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
unsigned int val = 0;
- clk_set_rate(keypad->clk, pdata->flags & EP93XX_KEYPAD_KDIV);
+ if (pdata->flags & EP93XX_KEYPAD_KDIV)
+ clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV4);
+ else
+ clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV16);
if (pdata->flags & EP93XX_KEYPAD_DISABLE_3_KEY)
val |= KEY_INIT_DIS3KY;
@@ -167,7 +171,7 @@ static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
val |= ((pdata->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);
- keypad_writel(val, KEY_INIT);
+ __raw_writel(val, keypad->mmio_base + KEY_INIT);
}
static int ep93xx_keypad_open(struct input_dev *pdev)
@@ -177,7 +181,7 @@ static int ep93xx_keypad_open(struct input_dev *pdev)
if (!keypad->enabled) {
ep93xx_keypad_config(keypad);
clk_enable(keypad->clk);
- keypad->enabled = 1;
+ keypad->enabled = true;
}
return 0;
@@ -189,7 +193,7 @@ static void ep93xx_keypad_close(struct input_dev *pdev)
if (keypad->enabled) {
clk_disable(keypad->clk);
- keypad->enabled = 0;
+ keypad->enabled = false;
}
}
@@ -211,7 +215,7 @@ static int ep93xx_keypad_suspend(struct platform_device *pdev,
if (keypad->enabled) {
clk_disable(keypad->clk);
- keypad->enabled = 0;
+ keypad->enabled = false;
}
mutex_unlock(&input_dev->mutex);
@@ -236,7 +240,7 @@ static int ep93xx_keypad_resume(struct platform_device *pdev)
if (!keypad->enabled) {
ep93xx_keypad_config(keypad);
clk_enable(keypad->clk);
- keypad->enabled = 1;
+ keypad->enabled = true;
}
}
@@ -252,88 +256,56 @@ static int ep93xx_keypad_resume(struct platform_device *pdev)
static int __devinit ep93xx_keypad_probe(struct platform_device *pdev)
{
struct ep93xx_keypad *keypad;
- struct ep93xx_keypad_platform_data *pdata = pdev->dev.platform_data;
struct input_dev *input_dev;
struct resource *res;
- int irq, err, i, gpio;
-
- if (!pdata ||
- !pdata->matrix_key_rows ||
- pdata->matrix_key_rows > MAX_MATRIX_KEY_ROWS ||
- !pdata->matrix_key_cols ||
- pdata->matrix_key_cols > MAX_MATRIX_KEY_COLS) {
- dev_err(&pdev->dev, "invalid or missing platform data\n");
- return -EINVAL;
- }
+ int err;
keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);
- if (!keypad) {
- dev_err(&pdev->dev, "failed to allocate driver data\n");
+ if (!keypad)
return -ENOMEM;
- }
- keypad->pdata = pdata;
+ keypad->pdata = pdev->dev.platform_data;
+ if (!keypad->pdata) {
+ err = -EINVAL;
+ goto failed_free;
+ }
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- dev_err(&pdev->dev, "failed to get keypad irq\n");
+ keypad->irq = platform_get_irq(pdev, 0);
+ if (!keypad->irq) {
err = -ENXIO;
goto failed_free;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
- dev_err(&pdev->dev, "failed to get I/O memory\n");
err = -ENXIO;
goto failed_free;
}
res = request_mem_region(res->start, resource_size(res), pdev->name);
if (!res) {
- dev_err(&pdev->dev, "failed to request I/O memory\n");
err = -EBUSY;
goto failed_free;
}
keypad->mmio_base = ioremap(res->start, resource_size(res));
if (keypad->mmio_base == NULL) {
- dev_err(&pdev->dev, "failed to remap I/O memory\n");
err = -ENXIO;
goto failed_free_mem;
}
- /* Request the needed GPIO's */
- gpio = EP93XX_GPIO_LINE_ROW0;
- for (i = 0; i < keypad->pdata->matrix_key_rows; i++, gpio++) {
- err = gpio_request(gpio, pdev->name);
- if (err) {
- dev_err(&pdev->dev, "failed to request gpio-%d\n",
- gpio);
- goto failed_free_rows;
- }
- }
-
- gpio = EP93XX_GPIO_LINE_COL0;
- for (i = 0; i < keypad->pdata->matrix_key_cols; i++, gpio++) {
- err = gpio_request(gpio, pdev->name);
- if (err) {
- dev_err(&pdev->dev, "failed to request gpio-%d\n",
- gpio);
- goto failed_free_cols;
- }
- }
+ err = ep93xx_keypad_acquire_gpio(pdev);
+ if (err)
+ goto failed_free_io;
- keypad->clk = clk_get(&pdev->dev, "key_clk");
+ keypad->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(keypad->clk)) {
- dev_err(&pdev->dev, "failed to get keypad clock\n");
err = PTR_ERR(keypad->clk);
- goto failed_free_io;
+ goto failed_free_gpio;
}
- /* Create and register the input driver */
input_dev = input_allocate_device();
if (!input_dev) {
- dev_err(&pdev->dev, "failed to allocate input device\n");
err = -ENOMEM;
goto failed_put_clk;
}
@@ -358,44 +330,29 @@ static int __devinit ep93xx_keypad_probe(struct platform_device *pdev)
ep93xx_keypad_build_keycode(keypad);
platform_set_drvdata(pdev, keypad);
- err = request_irq(irq, ep93xx_keypad_irq_handler, IRQF_DISABLED,
- pdev->name, keypad);
- if (err) {
- dev_err(&pdev->dev, "failed to request IRQ\n");
+ err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,
+ IRQF_DISABLED, pdev->name, keypad);
+ if (err)
goto failed_free_dev;
- }
-
- keypad->irq = irq;
- /* Register the input device */
err = input_register_device(input_dev);
- if (err) {
- dev_err(&pdev->dev, "failed to register input device\n");
+ if (err)
goto failed_free_irq;
- }
device_init_wakeup(&pdev->dev, 1);
return 0;
failed_free_irq:
- free_irq(irq, pdev);
+ free_irq(keypad->irq, pdev);
platform_set_drvdata(pdev, NULL);
failed_free_dev:
input_free_device(input_dev);
failed_put_clk:
clk_put(keypad->clk);
+failed_free_gpio:
+ ep93xx_keypad_release_gpio(pdev);
failed_free_io:
- i = keypad->pdata->matrix_key_cols - 1;
- gpio = EP93XX_GPIO_LINE_COL0 + i;
-failed_free_cols:
- for ( ; i >= 0; i--, gpio--)
- gpio_free(gpio);
- i = keypad->pdata->matrix_key_rows - 1;
- gpio = EP93XX_GPIO_LINE_ROW0 + i;
-failed_free_rows:
- for ( ; i >= 0; i--, gpio--)
- gpio_free(gpio);
iounmap(keypad->mmio_base);
failed_free_mem:
release_mem_region(res->start, resource_size(res));
@@ -408,7 +365,6 @@ static int __devexit ep93xx_keypad_remove(struct platform_device *pdev)
{
struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
struct resource *res;
- int i, gpio;
free_irq(keypad->irq, pdev);
@@ -420,15 +376,7 @@ static int __devexit ep93xx_keypad_remove(struct platform_device *pdev)
input_unregister_device(keypad->input_dev);
- i = keypad->pdata->matrix_key_cols - 1;
- gpio = EP93XX_GPIO_LINE_COL0 + i;
- for ( ; i >= 0; i--, gpio--)
- gpio_free(gpio);
-
- i = keypad->pdata->matrix_key_rows - 1;
- gpio = EP93XX_GPIO_LINE_ROW0 + i;
- for ( ; i >= 0; i--, gpio--)
- gpio_free(gpio);
+ ep93xx_keypad_release_gpio(pdev);
iounmap(keypad->mmio_base);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 08:48:26 +0000