input: Add keypad driver for w90p910

Dear Dmitry,

This is a latest keypad driver, according to your and H Hartley's advice, I fixed up my keypad driver again and merge this header file patch to keypad driver patch.

Hi Wan,

Quoted 6 lines · Wan ZongShun

Dear Dmitry,

This is a latest keypad driver, according to your and H Hartley's advice, I fixed up my keypad driver again and merge this header file patch to keypad driver patch.

I was waiting for the matrix_keypad code to settle before applying your drive; now that it has settled I ajusted w90p910_keypad to use definitions from include/linux/input/matrix_keypad.h and I am ready to apply it to my tree.

Could you please try the patch below to verify that I did not break anything (you'll have to pull the latest Linus tree to get the correct bits of matrix_keypad)?

Thanks!

--
Dmitry

Input: w90p910_keypad - adjust to use definitions from matrix_keypad.h

From: Dmitry Torokhov <[email protected]>

Also have the driver send MSC_SCAN events as most keyboards do to aid in updating keymap from userspace.

Signed-off-by Dmitry Torokhov <[email protected]>

---

 .../arm/mach-w90x900/include/mach/w90p910_keypad.h |    5 - drivers/input/keyboard/w90p910_keypad.c            |  144 +++++++++-----------

 2 files changed, 66 insertions(+), 83 deletions(-)

arch/arm/mach-w90x900/include/mach/w90p910_keypad.h +1 -4

index 79462fa..556778e 100644
@@ -6,13 +6,10 @@
  extern void mfp_set_groupi(struct device *dev);
 
  struct w90p910_keypad_platform_data {
+       const struct matrix_keymap_data *keymap_data;
 
        unsigned int    prescale;
        unsigned int    debounce;
-       unsigned int    matrix_key_rows;
-       unsigned int    matrix_key_cols;
-       unsigned int    *matrix_key_map;
-       int             matrix_key_map_size;
  };
 
  #endif /* __ASM_ARCH_W90P910_KEYPAD_H */

drivers/input/keyboard/w90p910_keypad.c +62 -74

index 472c705..24096cd 100644
@@ -41,58 +41,34 @@
  #define KGET_RAW(n)            (((n) & KEY0R) >> 3)
  #define KGET_COLUMN(n)         ((n) & KEY0C)
 
-#define MAX_MATRIX_KEY_NUM     (8 * 8)
+#define W90P910_MAX_KEY_NUM    (8 * 8)
+#define W90P910_ROW_SHIFT      3
 
  struct w90p910_keypad {
-       struct w90p910_keypad_platform_data *pdata;
+       const struct w90p910_keypad_platform_data *pdata;
        struct clk *clk;
        struct input_dev *input_dev;
        void __iomem *mmio_base;
        int irq;
-       unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
+       unsigned short keymap[W90P910_MAX_KEY_NUM];
  };
 
-static void w90p910_keypad_build_keycode(struct w90p910_keypad *keypad)
-{
-       struct w90p910_keypad_platform_data *pdata = keypad->pdata;
-       struct input_dev *input_dev = keypad->input_dev;
-       unsigned int *key;
-       int i;
-
-       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);
-       }
-}
-
-static inline unsigned int lookup_matrix_keycode(
-               struct w90p910_keypad *keypad, int row, int col)
-{
-       return keypad->matrix_keycodes[(row << 3) + col];
-}
-
  static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
                                                        unsigned int status)
  {
-       unsigned int row, col, val;
-
-       row = KGET_RAW(status);
-       col = KGET_COLUMN(status);
-
-       val = lookup_matrix_keycode(keypad, row, col);
-
-       input_report_key(keypad->input_dev, val, 1);
-
-       input_sync(keypad->input_dev);
-
-       input_report_key(keypad->input_dev, val, 0);
-
-       input_sync(keypad->input_dev);
+       struct input_dev *input_dev = keypad->input_dev;
+       unsigned int row = KGET_RAW(status);
+       unsigned int col = KGET_COLUMN(status);
+       unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
+       unsigned int key = keypad->keymap[code];
+
+       input_event(input_dev, EV_MSC, MSC_SCAN, code);
+       input_report_key(input_dev, key, 1);
+       input_sync(input_dev);
+
+       input_event(input_dev, EV_MSC, MSC_SCAN, code);
+       input_report_key(input_dev, key, 0);
+       input_sync(input_dev);
  }
 
  static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)

@@ -113,7 +89,7 @@ static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
  static int w90p910_keypad_open(struct input_dev *dev)
  {
        struct w90p910_keypad *keypad = input_get_drvdata(dev);
-       struct w90p910_keypad_platform_data *pdata = keypad->pdata;
+       const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
        unsigned int val, config;
 
        /* Enable unit clock */

@@ -142,31 +118,39 @@ static void w90p910_keypad_close(struct input_dev *dev)
 
  static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
  {
+       const struct w90p910_keypad_platform_data *pdata =
+                                               pdev->dev.platform_data;
+       const struct matrix_keymap_data *keymap_data = pdata->keymap_data;
        struct w90p910_keypad *keypad;
        struct input_dev *input_dev;
        struct resource *res;
-       int irq, error;
-
-       keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
-       if (keypad == NULL) {
-               dev_err(&pdev->dev, "failed to allocate driver data\n");
-               return -ENOMEM;
-       }
+       int irq;
+       int error;
+       int i;
 
-       keypad->pdata = pdev->dev.platform_data;
-       if (keypad->pdata == NULL) {
+       if (!pdata) {
                dev_err(&pdev->dev, "no platform data defined\n");
-               error = -EINVAL;
-               goto failed_free;
+               return -EINVAL;
        }
 
        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
                dev_err(&pdev->dev, "failed to get keypad irq\n");
-               error = -ENXIO;
+               return -ENXIO;
+       }
+
+       keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
+       input_dev = input_allocate_device();
+       if (!keypad || !input_dev) {
+               dev_err(&pdev->dev, "failed to allocate driver data\n");
+               error = -ENOMEM;
                goto failed_free;
        }
 
+       keypad->pdata = pdata;
+       keypad->input_dev = input_dev;
+       keypad->irq = irq;
+
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (res == NULL) {
                dev_err(&pdev->dev, "failed to get I/O memory\n");

@@ -185,7 +169,7 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
        if (keypad->mmio_base == NULL) {
                dev_err(&pdev->dev, "failed to remap I/O memory\n");
                error = -ENXIO;
-               goto failed_free_mem;
+               goto failed_free_res;
        }
 
        keypad->clk = clk_get(&pdev->dev, NULL);

@@ -195,14 +179,6 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
                goto failed_free_io;
        }
 
-       /* Create and register the input driver. */
-       input_dev = input_allocate_device();
-       if (!input_dev) {
-               dev_err(&pdev->dev, "failed to allocate input device\n");
-               error = -ENOMEM;
-               goto failed_put_clk;
-       }
-
        /* set multi-function pin for w90p910 kpi. */
        mfp_set_groupi(&pdev->dev);
 

@@ -211,26 +187,37 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
        input_dev->open = w90p910_keypad_open;
        input_dev->close = w90p910_keypad_close;
        input_dev->dev.parent = &pdev->dev;
-       input_dev->keycode = keypad->matrix_keycodes;
-       input_dev->keycodesize = sizeof(keypad->matrix_keycodes[0]);
-       input_dev->keycodemax = ARRAY_SIZE(keypad->matrix_keycodes);
 
-       keypad->input_dev = input_dev;
+       input_dev->keycode = keypad->keymap;
+       input_dev->keycodesize = sizeof(keypad->keymap[0]);
+       input_dev->keycodemax = ARRAY_SIZE(keypad->keymap);
+
        input_set_drvdata(input_dev, keypad);
 
        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
-       w90p910_keypad_build_keycode(keypad);
-       platform_set_drvdata(pdev, keypad);
+       input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+       for (i = 0; i < keymap_data->keymap_size; i++) {
+               unsigned int key = keymap_data->keymap[i];
+               unsigned int row = KEY_ROW(key);
+               unsigned int col = KEY_COL(key);
+               unsigned short keycode = KEY_VAL(key);
+               unsigned int scancode = MATRIX_SCAN_CODE(row, col,
+                                                        W90P910_ROW_SHIFT);
+
+               keypad->keymap[scancode] = keycode;
+               __set_bit(keycode, input_dev->keybit);
+       }
+       __clear_bit(KEY_RESERVED, input_dev->keybit);
+
 
-       error = request_irq(irq, w90p910_keypad_irq_handler, IRQF_DISABLED,
-                           pdev->name, keypad);
+       error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
+                           IRQF_DISABLED, pdev->name, keypad);
        if (error) {
                dev_err(&pdev->dev, "failed to request IRQ\n");
-               goto failed_free_dev;
+               goto failed_put_clk;
        }
 
-       keypad->irq = irq;
-
        /* Register the input device */
        error = input_register_device(input_dev);
        if (error) {

@@ -238,20 +225,19 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
                goto failed_free_irq;
        }
 
+       platform_set_drvdata(pdev, keypad);
        return 0;
 

 failed_free_irq:
       free_irq(irq, pdev);
-       platform_set_drvdata(pdev, NULL);
-failed_free_dev:
-       input_free_device(input_dev);
 failed_put_clk:
       clk_put(keypad->clk);
 failed_free_io:
       iounmap(keypad->mmio_base);

drivers/input/keyboard/w90p910_keypad.c +1 -1

-failed_free_mem:
+failed_free_res:

       release_mem_region(res->start, resource_size(res)); failed_free:
+       input_free_device(input_dev); kfree(keypad);
       return error;
 }

drivers/input/keyboard/w90p910_keypad.c +1 -1

@@ -268,12 +254,12 @@ static int __devexit w90p910_keypad_remove(struct platform_device *pdev)
        input_unregister_device(keypad->input_dev);
 
        iounmap(keypad->mmio_base);
-
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        release_mem_region(res->start, resource_size(res));
 
        platform_set_drvdata(pdev, NULL);
        kfree(keypad);
+
        return 0;
  }
 

Dear Dmitry,

I have tested this patch, and it work very well.
Thank you for helping me fix my keypad driver and I appreciate this kindness.