Input: ati_remote2 - add loadable keymap support

Support for loadable keymaps. The driver now supports individual
keymaps for each of the five modes (AUX1-AUX4 and PC) of the
remote. To achieve this the keymap scancode is interpreted as a
combination of the mode and actual button scancode. The original
keycode patches were done by Peter Stokes <linux@dadeos.co.uk>
but I modified it quite a lot.

Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 101 insertions, 29 deletions

diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index a7fabafbd94c..f4918b9bb949 100644
--- a/drivers/input/misc/ati_remote2.c
+++ b/drivers/input/misc/ati_remote2.c
@@ -1,8 +1,8 @@
 /*
  * ati_remote2 - ATI/Philips USB RF remote driver
  *
- * Copyright (C) 2005 Ville Syrjala <syrjala@sci.fi>
- * Copyright (C) 2007 Peter Stokes <linux@dadeos.freeserve.co.uk>
+ * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
+ * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
@@ -12,7 +12,7 @@
 #include <linux/usb/input.h>
 
 #define DRIVER_DESC    "ATI/Philips USB RF remote driver"
-#define DRIVER_VERSION "0.2"
+#define DRIVER_VERSION "0.3"
 
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_VERSION(DRIVER_VERSION);
@@ -27,7 +27,7 @@ MODULE_LICENSE("GPL");
  * A remote's "channel" may be altered by pressing and holding the "PC" button for
  * approximately 3 seconds, after which the button will slowly flash the count of the
  * currently configured "channel", using the numeric keypad enter a number between 1 and
- * 16 and then the "PC" button again, the button will slowly flash the count of the
+ * 16 and then press the "PC" button again, the button will slowly flash the count of the
  * newly configured "channel".
  */
 
@@ -45,9 +45,18 @@ static struct usb_device_id ati_remote2_id_table[] = {
 };
 MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
 
-static struct {
-        int hw_code;
-        int key_code;
+enum {
+        ATI_REMOTE2_AUX1,
+        ATI_REMOTE2_AUX2,
+        ATI_REMOTE2_AUX3,
+        ATI_REMOTE2_AUX4,
+        ATI_REMOTE2_PC,
+        ATI_REMOTE2_MODES,
+};
+
+static const struct {
+        u8  hw_code;
+        u16 keycode;
 } ati_remote2_key_table[] = {
         { 0x00, KEY_0 },
         { 0x01, KEY_1 },
@@ -73,6 +82,7 @@ static struct {
         { 0x37, KEY_RECORD },
         { 0x38, KEY_DVD },
         { 0x39, KEY_TV },
+        { 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
         { 0x54, KEY_MENU },
         { 0x58, KEY_UP },
         { 0x59, KEY_DOWN },
@@ -91,15 +101,9 @@ static struct {
         { 0xa9, BTN_LEFT },
         { 0xaa, BTN_RIGHT },
         { 0xbe, KEY_QUESTION },
-        { 0xd5, KEY_FRONT },
         { 0xd0, KEY_EDIT },
+        { 0xd5, KEY_FRONT },
         { 0xf9, KEY_INFO },
-        { (0x00 << 8) | 0x3f, KEY_PROG1 },
-        { (0x01 << 8) | 0x3f, KEY_PROG2 },
-        { (0x02 << 8) | 0x3f, KEY_PROG3 },
-        { (0x03 << 8) | 0x3f, KEY_PROG4 },
-        { (0x04 << 8) | 0x3f, KEY_PC },
-        { 0, KEY_RESERVED }
 };
 
 struct ati_remote2 {
@@ -117,6 +121,9 @@ struct ati_remote2 {
 
         char name[64];
         char phys[64];
+
+        /* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
+        u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
 };
 
 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
@@ -172,7 +179,7 @@ static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
 
         mode = data[0] & 0x0F;
 
-        if (mode > 4) {
+        if (mode > ATI_REMOTE2_PC) {
                 dev_err(&ar2->intf[0]->dev,
                         "Unknown mode byte (%02x %02x %02x %02x)\n",
                         data[3], data[2], data[1], data[0]);
@@ -191,7 +198,7 @@ static int ati_remote2_lookup(unsigned int hw_code)
 {
         int i;
 
-        for (i = 0; ati_remote2_key_table[i].key_code != KEY_RESERVED; i++)
+        for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
                 if (ati_remote2_key_table[i].hw_code == hw_code)
                         return i;
 
@@ -211,7 +218,7 @@ static void ati_remote2_input_key(struct ati_remote2 *ar2)
 
         mode = data[0] & 0x0F;
 
-        if (mode > 4) {
+        if (mode > ATI_REMOTE2_PC) {
                 dev_err(&ar2->intf[1]->dev,
                         "Unknown mode byte (%02x %02x %02x %02x)\n",
                         data[3], data[2], data[1], data[0]);
@@ -219,10 +226,6 @@ static void ati_remote2_input_key(struct ati_remote2 *ar2)
         }
 
         hw_code = data[2];
-        /*
-         * Mode keys (AUX1-AUX4, PC) all generate the same code byte.
-         * Use the mode byte to figure out which one was pressed.
-         */
         if (hw_code == 0x3f) {
                 /*
                  * For some incomprehensible reason the mouse pad generates
@@ -236,8 +239,6 @@ static void ati_remote2_input_key(struct ati_remote2 *ar2)
 
                 if (data[1] == 0)
                         ar2->mode = mode;
-
-                hw_code |= mode << 8;
         }
 
         if (!((1 << mode) & mode_mask))
@@ -260,8 +261,8 @@ static void ati_remote2_input_key(struct ati_remote2 *ar2)
         case 2: /* repeat */
 
                 /* No repeat for mouse buttons. */
-                if (ati_remote2_key_table[index].key_code == BTN_LEFT ||
-                    ati_remote2_key_table[index].key_code == BTN_RIGHT)
+                if (ar2->keycode[mode][index] == BTN_LEFT ||
+                    ar2->keycode[mode][index] == BTN_RIGHT)
                         return;
 
                 if (!time_after_eq(jiffies, ar2->jiffies))
@@ -276,7 +277,7 @@ static void ati_remote2_input_key(struct ati_remote2 *ar2)
                 return;
         }
 
-        input_event(idev, EV_KEY, ati_remote2_key_table[index].key_code, data[1]);
+        input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
         input_sync(idev);
 }
 
@@ -334,10 +335,60 @@ static void ati_remote2_complete_key(struct urb *urb)
                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 }
 
+static int ati_remote2_getkeycode(struct input_dev *idev,
+                                  int scancode, int *keycode)
+{
+        struct ati_remote2 *ar2 = input_get_drvdata(idev);
+        int index, mode;
+
+        mode = scancode >> 8;
+        if (mode > ATI_REMOTE2_PC || !((1 << mode) & mode_mask))
+                return -EINVAL;
+
+        index = ati_remote2_lookup(scancode & 0xFF);
+        if (index < 0)
+                return -EINVAL;
+
+        *keycode = ar2->keycode[mode][index];
+        return 0;
+}
+
+static int ati_remote2_setkeycode(struct input_dev *idev, int scancode, int keycode)
+{
+        struct ati_remote2 *ar2 = input_get_drvdata(idev);
+        int index, mode, old_keycode;
+
+        mode = scancode >> 8;
+        if (mode > ATI_REMOTE2_PC || !((1 << mode) & mode_mask))
+                return -EINVAL;
+
+        index = ati_remote2_lookup(scancode & 0xFF);
+        if (index < 0)
+                return -EINVAL;
+
+        if (keycode < KEY_RESERVED || keycode > KEY_MAX)
+                return -EINVAL;
+
+        old_keycode = ar2->keycode[mode][index];
+        ar2->keycode[mode][index] = keycode;
+        set_bit(keycode, idev->keybit);
+
+        for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
+                for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
+                        if (ar2->keycode[mode][index] == old_keycode)
+                                return 0;
+                }
+        }
+
+        clear_bit(old_keycode, idev->keybit);
+
+        return 0;
+}
+
 static int ati_remote2_input_init(struct ati_remote2 *ar2)
 {
         struct input_dev *idev;
-        int i, retval;
+        int index, mode, retval;
 
         idev = input_allocate_device();
         if (!idev)
@@ -350,8 +401,26 @@ static int ati_remote2_input_init(struct ati_remote2 *ar2)
         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
                 BIT_MASK(BTN_RIGHT);
         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
-        for (i = 0; ati_remote2_key_table[i].key_code != KEY_RESERVED; i++)
-                set_bit(ati_remote2_key_table[i].key_code, idev->keybit);
+
+        for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
+                for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
+                        ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
+                        set_bit(ar2->keycode[mode][index], idev->keybit);
+                }
+        }
+
+        /* AUX1-AUX4 and PC generate the same scancode. */
+        index = ati_remote2_lookup(0x3f);
+        ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
+        ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
+        ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
+        ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
+        ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
+        set_bit(KEY_PROG1, idev->keybit);
+        set_bit(KEY_PROG2, idev->keybit);
+        set_bit(KEY_PROG3, idev->keybit);
+        set_bit(KEY_PROG4, idev->keybit);
+        set_bit(KEY_PC, idev->keybit);
 
         idev->rep[REP_DELAY]  = 250;
         idev->rep[REP_PERIOD] = 33;
@@ -359,6 +428,9 @@ static int ati_remote2_input_init(struct ati_remote2 *ar2)
         idev->open = ati_remote2_open;
         idev->close = ati_remote2_close;
 
+        idev->getkeycode = ati_remote2_getkeycode;
+        idev->setkeycode = ati_remote2_setkeycode;
+
         idev->name = ar2->name;
         idev->phys = ar2->phys;