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support Thinkpad X1 Carbon 2nd generation's adaptive keyboard

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Submit patch V4 to support Adaptive Keyboard on Thinkpad X1 Carbon 2nd
generation according to Tobias's comments.

Thanks,
Shuduo

>From b153a7b14791c6e01892c0e274e23eefd625fb8d Mon Sep 17 00:00:00 2001
From: Shuduo Sang <shuduo.sang@canonical.com>
Date: Mon, 3 Mar 2014 14:29:32 +0800
Subject: [PATCH] support thinkpad X1 Carbon's adaptive keyboard

Thinkpad X1 Carbon's adaptive keyboard has five modes including Home
mode, Web browser mode, Web conference mode, Function mode and Lay-flat
mode. We support Home mode and Function mode currently.

Signed-off-by: Bruce Ma <bruce.ma@canonical.com>
Signed-off-by: Shuduo Sang <shuduo.sang@canonical.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Shuduo Sang 2014-03-06 18:20:46 +08:00 committed by Matthew Garrett
parent ea6b31f494
commit 3a9d20bda1
1 changed files with 102 additions and 0 deletions
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102
drivers/platform/x86/thinkpad_acpi.c
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@ -3437,6 +3437,106 @@ err_exit:
return (res < 0)? res : 1; return (res < 0)? res : 1;
} }
/* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
* mode, Web conference mode, Function mode and Lay-flat mode.
* We support Home mode and Function mode currently.
*
* Will consider support rest of modes in future.
*
*/
enum ADAPTIVE_KEY_MODE {
HOME_MODE,
WEB_BROWSER_MODE,
WEB_CONFERENCE_MODE,
FUNCTION_MODE,
LAYFLAT_MODE
};
const int adaptive_keyboard_modes[] = {
HOME_MODE,
/* WEB_BROWSER_MODE = 2,
WEB_CONFERENCE_MODE = 3, */
FUNCTION_MODE
};
#define DFR_CHANGE_ROW 0x101
#define DFR_SHOW_QUICKVIEW_ROW 0x102
/* press Fn key a while second, it will switch to Function Mode. Then
* release Fn key, previous mode be restored.
*/
static bool adaptive_keyboard_mode_is_saved;
static int adaptive_keyboard_prev_mode;
static int adaptive_keyboard_get_next_mode(int mode)
{
size_t i;
size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
for (i = 0; i <= max_mode; i++) {
if (adaptive_keyboard_modes[i] == mode)
break;
}
if (i >= max_mode)
i = 0;
else
i++;
return adaptive_keyboard_modes[i];
}
static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
{
u32 current_mode = 0;
int new_mode = 0;
switch (scancode) {
case DFR_CHANGE_ROW:
if (adaptive_keyboard_mode_is_saved) {
new_mode = adaptive_keyboard_prev_mode;
adaptive_keyboard_mode_is_saved = false;
} else {
if (!acpi_evalf(
hkey_handle, &current_mode,
"GTRW", "dd", 0)) {
pr_err("Cannot read adaptive keyboard mode\n");
return false;
} else {
new_mode = adaptive_keyboard_get_next_mode(
current_mode);
}
}
if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
pr_err("Cannot set adaptive keyboard mode\n");
return false;
}
return true;
case DFR_SHOW_QUICKVIEW_ROW:
if (!acpi_evalf(hkey_handle,
&adaptive_keyboard_prev_mode,
"GTRW", "dd", 0)) {
pr_err("Cannot read adaptive keyboard mode\n");
return false;
} else {
adaptive_keyboard_mode_is_saved = true;
if (!acpi_evalf(hkey_handle,
NULL, "STRW", "vd", FUNCTION_MODE)) {
pr_err("Cannot set adaptive keyboard mode\n");
return false;
}
}
return true;
default:
return false;
}
}
static bool hotkey_notify_hotkey(const u32 hkey, static bool hotkey_notify_hotkey(const u32 hkey,
bool *send_acpi_ev, bool *send_acpi_ev,
bool *ignore_acpi_ev) bool *ignore_acpi_ev)
@ -3456,6 +3556,8 @@ static bool hotkey_notify_hotkey(const u32 hkey,
*ignore_acpi_ev = true; *ignore_acpi_ev = true;
} }
return true; return true;
} else {
return adaptive_keyboard_hotkey_notify_hotkey(scancode);
} }
return false; return false;
} }