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>

1 files changed, 28 insertions, 12 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.