diff options
Diffstat (limited to 'drivers/platform/x86/sony-laptop.c')
| -rw-r--r-- | drivers/platform/x86/sony-laptop.c | 65 |
1 files changed, 53 insertions, 12 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index e642f5f29504..8f709aec4da0 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -138,6 +138,8 @@ MODULE_PARM_DESC(kbd_backlight_timeout, "1 for 30 seconds, 2 for 60 seconds and 3 to disable timeout " "(default: 0)"); +static void sony_nc_kbd_backlight_resume(void); + enum sony_nc_rfkill { SONY_WIFI, SONY_BLUETOOTH, @@ -771,11 +773,6 @@ static int sony_nc_handles_setup(struct platform_device *pd) if (!handles) return -ENOMEM; - sysfs_attr_init(&handles->devattr.attr); - handles->devattr.attr.name = "handles"; - handles->devattr.attr.mode = S_IRUGO; - handles->devattr.show = sony_nc_handles_show; - for (i = 0; i < ARRAY_SIZE(handles->cap); i++) { if (!acpi_callsetfunc(sony_nc_acpi_handle, "SN00", i + 0x20, &result)) { @@ -785,11 +782,18 @@ static int sony_nc_handles_setup(struct platform_device *pd) } } - /* allow reading capabilities via sysfs */ - if (device_create_file(&pd->dev, &handles->devattr)) { - kfree(handles); - handles = NULL; - return -1; + if (debug) { + sysfs_attr_init(&handles->devattr.attr); + handles->devattr.attr.name = "handles"; + handles->devattr.attr.mode = S_IRUGO; + handles->devattr.show = sony_nc_handles_show; + + /* allow reading capabilities via sysfs */ + if (device_create_file(&pd->dev, &handles->devattr)) { + kfree(handles); + handles = NULL; + return -1; + } } return 0; @@ -798,7 +802,8 @@ static int sony_nc_handles_setup(struct platform_device *pd) static int sony_nc_handles_cleanup(struct platform_device *pd) { if (handles) { - device_remove_file(&pd->dev, &handles->devattr); + if (debug) + device_remove_file(&pd->dev, &handles->devattr); kfree(handles); handles = NULL; } @@ -808,6 +813,11 @@ static int sony_nc_handles_cleanup(struct platform_device *pd) static int sony_find_snc_handle(int handle) { int i; + + /* not initialized yet, return early */ + if (!handles) + return -1; + for (i = 0; i < 0x10; i++) { if (handles->cap[i] == handle) { dprintk("found handle 0x%.4x (offset: 0x%.2x)\n", @@ -1168,6 +1178,9 @@ static int sony_nc_resume(struct acpi_device *device) /* re-read rfkill state */ sony_nc_rfkill_update(); + /* restore kbd backlight states */ + sony_nc_kbd_backlight_resume(); + return 0; } @@ -1355,6 +1368,7 @@ out_no_enum: #define KBDBL_HANDLER 0x137 #define KBDBL_PRESENT 0xB00 #define SET_MODE 0xC00 +#define SET_STATE 0xD00 #define SET_TIMEOUT 0xE00 struct kbd_backlight { @@ -1377,6 +1391,10 @@ static ssize_t __sony_nc_kbd_backlight_mode_set(u8 value) (value << 0x10) | SET_MODE, &result)) return -EIO; + /* Try to turn the light on/off immediately */ + sony_call_snc_handle(KBDBL_HANDLER, (value << 0x10) | SET_STATE, + &result); + kbdbl_handle->mode = value; return 0; @@ -1458,7 +1476,7 @@ static int sony_nc_kbd_backlight_setup(struct platform_device *pd) { int result; - if (sony_call_snc_handle(0x137, KBDBL_PRESENT, &result)) + if (sony_call_snc_handle(KBDBL_HANDLER, KBDBL_PRESENT, &result)) return 0; if (!(result & 0x02)) return 0; @@ -1501,13 +1519,36 @@ outkzalloc: static int sony_nc_kbd_backlight_cleanup(struct platform_device *pd) { if (kbdbl_handle) { + int result; + device_remove_file(&pd->dev, &kbdbl_handle->mode_attr); device_remove_file(&pd->dev, &kbdbl_handle->timeout_attr); + + /* restore the default hw behaviour */ + sony_call_snc_handle(KBDBL_HANDLER, 0x1000 | SET_MODE, &result); + sony_call_snc_handle(KBDBL_HANDLER, SET_TIMEOUT, &result); + kfree(kbdbl_handle); } return 0; } +static void sony_nc_kbd_backlight_resume(void) +{ + int ignore = 0; + + if (!kbdbl_handle) + return; + + if (kbdbl_handle->mode == 0) + sony_call_snc_handle(KBDBL_HANDLER, SET_MODE, &ignore); + + if (kbdbl_handle->timeout != 0) + sony_call_snc_handle(KBDBL_HANDLER, + (kbdbl_handle->timeout << 0x10) | SET_TIMEOUT, + &ignore); +} + static void sony_nc_backlight_setup(void) { acpi_handle unused; |