ACPI: thinkpad-acpi: react to Lenovo ThinkPad differences in hot key

Lenovo ThinkPads have a slightly different key map layout from IBM
ThinkPads (fn+f2 and fn+f3 are swapped).  Knowing which one we are dealing
with, we can properly set a few more hot keys up by default.

Also, export the correct vendor in the input device, as that information
might be useful to userspace.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 109 insertions, 40 deletions

diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index c145bcce2339..5d827ded34d1 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -270,7 +270,8 @@ remapping KEY_UNKNOWN keys.
 The events are available in an input device, with the following id:
 
         Bus:            BUS_HOST
-        vendor:         0x1014 (PCI_VENDOR_ID_IBM)
+        vendor:         0x1014 (PCI_VENDOR_ID_IBM)  or
+                        0x17aa (PCI_VENDOR_ID_LENOVO)
         product:        0x5054 ("TP")
         version:        0x4101
 
@@ -290,12 +291,15 @@ ACPI	Scan
 event   code    Key             Notes
 
 0x1001  0x00    FN+F1           -
-0x1002  0x01    FN+F2           -
+0x1002  0x01    FN+F2           IBM: battery (rare)
+                                Lenovo: Screen lock
 
-0x1003  0x02    FN+F3           Many models always report this
-                                hot key, even with hot keys
+0x1003  0x02    FN+F3           Many IBM models always report
+                                this hot key, even with hot keys
                                 disabled or with Fn+F3 masked
                                 off
+                                IBM: screen lock
+                                Lenovo: battery
 
 0x1004  0x03    FN+F4           Sleep button (ACPI sleep button
                                 semanthics, i.e. sleep-to-RAM).
@@ -313,13 +317,19 @@ event	code	Key		Notes
                                 and W-WAN card if left in control
                                 of the firmware.  Does not affect
                                 the WLAN card.
+                                Should be used to turn on/off all
+                                radios (bluetooth+W-WAN+WLAN),
+                                really.
 
 0x1006  0x05    FN+F6           -
 
 0x1007  0x06    FN+F7           Video output cycle.
                                 Do you feel lucky today?
 
-0x1008  0x07    FN+F8           -
+0x1008  0x07    FN+F8           IBM: toggle screen expand
+                                Lenovo: configure ultranav
+
+0x1009  0x08    FN+F9           -
         ..      ..              ..
 0x100B  0x0A    FN+F11          -
 
@@ -338,13 +348,15 @@ event	code	Key		Notes
 0x100F  0x0E    FN+DELETE       -
 
 0x1010  0x0F    FN+HOME         Brightness up.  This key is
-                                always handled by the firmware,
-                                even when unmasked.  Just leave
-                                it alone.
-0x1011  0x10    FN+END          Brightness down. This key is
-                                always handled by the firmware,
-                                even when unmasked.  Just leave
-                                it alone.
+                                always handled by the firmware
+                                in IBM ThinkPads, even when
+                                unmasked.  Just leave it alone.
+                                For Lenovo ThinkPads with a new
+                                BIOS, it has to be handled either
+                                by the ACPI OSI, or by userspace.
+0x1011  0x10    FN+END          Brightness down.  See brightness
+                                up for details.
+
 0x1012  0x11    FN+PGUP         Thinklight toggle.  This key is
                                 always handled by the firmware,
                                 even when unmasked.
@@ -356,9 +368,13 @@ event	code	Key		Notes
 0x1015  0x14    VOLUME UP       Internal mixer volume up. This
                                 key is always handled by the
                                 firmware, even when unmasked.
+                                NOTE: Lenovo seems to be changing
+                                this.
 0x1016  0x15    VOLUME DOWN     Internal mixer volume up. This
                                 key is always handled by the
                                 firmware, even when unmasked.
+                                NOTE: Lenovo seems to be changing
+                                this.
 0x1017  0x16    MUTE            Mute internal mixer. This
                                 key is always handled by the
                                 firmware, even when unmasked.
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 5318eb272c61..623d36fd8dbe 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -758,29 +758,7 @@ static u32 hotkey_orig_mask;
 static u32 hotkey_all_mask;
 static u32 hotkey_reserved_mask;
 
-static u16 hotkey_keycode_map[] = {
-        /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
-        KEY_FN_F1,      KEY_FN_F2,      KEY_FN_F3,      KEY_SLEEP,
-        KEY_FN_F5,      KEY_FN_F6,      KEY_FN_F7,      KEY_FN_F8,
-        KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
-        /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
-        KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
-        KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
-        KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
-        KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
-        /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
-        KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
-        KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
-        KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
-        KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
-        KEY_RESERVED,   /* 0x14: VOLUME UP */
-        KEY_RESERVED,   /* 0x15: VOLUME DOWN */
-        KEY_RESERVED,   /* 0x16: MUTE */
-        KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
-        /* (assignments unknown, please report if found) */
-        KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
-        KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
-};
+static u16 *hotkey_keycode_map;
 
 static struct attribute_set *hotkey_dev_attributes;
 
@@ -939,6 +917,58 @@ static struct attribute *hotkey_mask_attributes[] = {
 
 static int __init hotkey_init(struct ibm_init_struct *iibm)
 {
+
+        static u16 ibm_keycode_map[] __initdata = {
+                /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
+                KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
+                KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
+                KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
+                /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
+                KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
+                KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
+                KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
+                KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
+                /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
+                KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
+                KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
+                KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
+                KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
+                KEY_RESERVED,   /* 0x14: VOLUME UP */
+                KEY_RESERVED,   /* 0x15: VOLUME DOWN */
+                KEY_RESERVED,   /* 0x16: MUTE */
+                KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
+                /* (assignments unknown, please report if found) */
+                KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+                KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+        };
+        static u16 lenovo_keycode_map[] __initdata = {
+                /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
+                KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
+                KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
+                KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
+                /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
+                KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
+                KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
+                KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
+                KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
+                /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
+                KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
+                KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
+                KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
+                KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
+                KEY_RESERVED,   /* 0x14: VOLUME UP */
+                KEY_RESERVED,   /* 0x15: VOLUME DOWN */
+                KEY_RESERVED,   /* 0x16: MUTE */
+                KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
+                /* (assignments unknown, please report if found) */
+                KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+                KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+        };
+
+#define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
+#define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
+#define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
+
         int res, i;
         int status;
 
@@ -1003,6 +1033,27 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                 if (res)
                         return res;
 
+                /* Set up key map */
+
+                hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
+                                                GFP_KERNEL);
+                if (!hotkey_keycode_map) {
+                        printk(IBM_ERR "failed to allocate memory for key map\n");
+                        return -ENOMEM;
+                }
+
+                if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
+                        dbg_printk(TPACPI_DBG_INIT,
+                                   "using Lenovo default hot key map\n");
+                        memcpy(hotkey_keycode_map, &lenovo_keycode_map,
+                                TPACPI_HOTKEY_MAP_SIZE);
+                } else {
+                        dbg_printk(TPACPI_DBG_INIT,
+                                   "using IBM default hot key map\n");
+                        memcpy(hotkey_keycode_map, &ibm_keycode_map,
+                                TPACPI_HOTKEY_MAP_SIZE);
+                }
+
 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
                 for (i = 0; i < 12; i++)
                         hotkey_keycode_map[i] = KEY_UNKNOWN;
@@ -1011,10 +1062,10 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
-                tpacpi_inputdev->keycodesize = sizeof(hotkey_keycode_map[0]);
-                tpacpi_inputdev->keycodemax = ARRAY_SIZE(hotkey_keycode_map);
-                tpacpi_inputdev->keycode = &hotkey_keycode_map;
-                for (i = 0; i < ARRAY_SIZE(hotkey_keycode_map); i++) {
+                tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
+                tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
+                tpacpi_inputdev->keycode = hotkey_keycode_map;
+                for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
                                 set_bit(hotkey_keycode_map[i],
                                         tpacpi_inputdev->keybit);
@@ -4618,7 +4669,9 @@ static int __init thinkpad_acpi_module_init(void)
                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
                 tpacpi_inputdev->id.bustype = BUS_HOST;
-                tpacpi_inputdev->id.vendor = TPACPI_HKEY_INPUT_VENDOR;
+                tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
+                                                thinkpad_id.vendor :
+                                                PCI_VENDOR_ID_IBM;
                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
         }