diff options
| -rw-r--r-- | Documentation/thinkpad-acpi.txt | 89 | ||||
| -rw-r--r-- | drivers/misc/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 19 |
3 files changed, 70 insertions, 51 deletions
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt index 91d08921a4ca..5b59cf50b2e9 100644 --- a/Documentation/thinkpad-acpi.txt +++ b/Documentation/thinkpad-acpi.txt @@ -155,52 +155,47 @@ Hot keys procfs: /proc/acpi/ibm/hotkey sysfs device attribute: hotkey_* -Without this driver, only the Fn-F4 key (sleep button) generates an -ACPI event. With the driver loaded, the hotkey feature enabled and the -mask set (see below), the various hot keys generate ACPI events in the +In a ThinkPad, the ACPI HKEY handler is responsible for comunicating +some important events and also keyboard hot key presses to the operating +system. Enabling the hotkey functionality of thinkpad-acpi signals the +firmware that such a driver is present, and modifies how the ThinkPad +firmware will behave in many situations. + +When the hotkey feature is enabled and the hot key mask is set (see +below), the various hot keys either generate ACPI events in the following format: ibm/hotkey HKEY 00000080 0000xxxx -The last four digits vary depending on the key combination pressed. -All labeled Fn-Fx key combinations generate distinct events. In -addition, the lid microswitch and some docking station buttons may -also generate such events. - -Hot keys also generate regular keyboard key press/release events through -the input layer in addition to the ibm/hotkey ACPI events. The input -layer support accepts the standard IOCTLs to remap the keycodes assigned -to each hotkey. +or events over the input layer. The input layer support accepts the +standard IOCTLs to remap the keycodes assigned to each hotkey. When the input device is open, the driver will suppress any ACPI hot key events that get translated into a meaningful input layer event, in order to avoid sending duplicate events to userspace. Hot keys that are -mapped to KEY_RESERVED are not translated, and will always generate only -ACPI hot key event, and no input layer events. - -The bit mask allows some control over which hot keys generate ACPI -events. Not all bits in the mask can be modified. Not all bits that can -be modified do anything. Not all hot keys can be individually controlled -by the mask. Some models do not support the mask at all. On those -models, hot keys cannot be controlled individually. - -Note that enabling ACPI events for some keys prevents their default -behavior. For example, if events for Fn-F5 are enabled, that key will no -longer enable/disable Bluetooth by itself. This can still be done from -an acpid handler for the ibm/hotkey event. - -On some models, even enabling/disabling the entire hot key feature may -change the way some keys behave (e.g. in a T43, Fn+F4 will generate an -button/sleep ACPI event if hot keys are disabled, and it will ignore its -mask when hot keys are enabled, so the key always does something. On a -X40, Fn+F4 respects its mask status, but generates the button/sleep ACPI -event if masked off). - -Note also that not all Fn key combinations are supported through -ACPI. For example, on the X40, the brightness, volume and "Access IBM" -buttons do not generate ACPI events even with this driver. They *can* -be used through the "ThinkPad Buttons" utility, see -http://www.nongnu.org/tpb/ +mapped to KEY_RESERVED in the keymap are not translated, and will always +generate an ACPI ibm/hotkey HKEY event, and no input layer events. + +The hot key bit mask allows some control over which hot keys generate +events. If a key is "masked" (bit set to 0 in the mask), the firmware +will handle it. If it is "unmasked", it signals the firmware that +thinkpad-acpi would prefer to handle it, if the firmware would be so +kind to allow it (and it often doesn't!). + +Not all bits in the mask can be modified. Not all bits that can be +modified do anything. Not all hot keys can be individually controlled +by the mask. Some models do not support the mask at all, and in those +models, hot keys cannot be controlled individually. The behaviour of +the mask is, therefore, higly dependent on the ThinkPad model. + +Note that unmasking some keys prevents their default behavior. For +example, if Fn+F5 is unmasked, that key will no longer enable/disable +Bluetooth by itself. + +Note also that not all Fn key combinations are supported through ACPI. +For example, on the X40, the brightness, volume and "Access IBM" buttons +do not generate ACPI events even with this driver. They *can* be used +through the "ThinkPad Buttons" utility, see http://www.nongnu.org/tpb/ procfs notes: @@ -221,7 +216,7 @@ sysfs notes: key feature status will be restored to this value. 0: hot keys were disabled - 1: hot keys were enabled + 1: hot keys were enabled (unusual) hotkey_bios_mask: Returns the hot keys mask when thinkpad-acpi was loaded. @@ -236,9 +231,10 @@ sysfs notes: 1: enables the hot keys feature / feature enabled hotkey_mask: - bit mask to enable ACPI event generation for each hot - key (see above). Returns the current status of the hot - keys mask, and allows one to modify it. + bit mask to enable driver-handling and ACPI event + generation for each hot key (see above). Returns the + current status of the hot keys mask, and allows one to + modify it. hotkey_all_mask: bit mask that should enable event reporting for all @@ -250,8 +246,9 @@ sysfs notes: hotkey_recommended_mask: bit mask that should enable event reporting for all - supported hot keys, except those which are handled by - the firmware. Echo it to hotkey_mask above, to use. + supported hot keys, except those which are always + handled by the firmware anyway. Echo it to + hotkey_mask above, to use. hotkey_radio_sw: if the ThinkPad has a hardware radio switch, this @@ -390,10 +387,6 @@ ACPI hotkey event. If a key is mapped to anything else, it will only generate legacy thinkpad-acpi ACPI hotkey events if nobody has opened the input device. -For userspace backwards-compatibility purposes, the keycode map is -initially filled with KEY_RESERVED and KEY_UNKNOWN mappings for scan codes -0x00 to 0x10 (and maybe others). - Non hot-key ACPI HKEY event map: 0x5001 Lid closed 0x5002 Lid opened diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 1d516f24ba53..5197f9b9b65d 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -196,4 +196,17 @@ config THINKPAD_ACPI_BAY If you are not sure, say Y here. +config THINKPAD_ACPI_INPUT_ENABLED + bool "Enable input layer support by default" + depends on THINKPAD_ACPI + default y + ---help--- + Enables hot key handling over the input layer by default. If unset, + the driver does not enable any hot key handling by default, and also + starts up with a mostly empty keymap. + + If you are not sure, say Y here. Say N to retain the deprecated + behavior of ibm-acpi, and thinkpad-acpi for kernels up to 2.6.21. + + endif # MISC_DEVICES diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 5c1bea1a6c37..c86b228375cc 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -734,9 +734,9 @@ static u32 hotkey_reserved_mask; static u16 hotkey_keycode_map[] = { /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ - KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, - KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, - KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, + 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 */ @@ -977,6 +977,11 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) if (res) return res; +#ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED + for (i = 0; i < 12; i++) + hotkey_keycode_map[i] = KEY_UNKNOWN; +#endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */ + set_bit(EV_KEY, tpacpi_inputdev->evbit); set_bit(EV_MSC, tpacpi_inputdev->evbit); set_bit(MSC_SCAN, tpacpi_inputdev->mscbit); @@ -993,6 +998,14 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) } } +#ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED + dbg_printk(TPACPI_DBG_INIT, + "enabling hot key handling\n"); + res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask) + | hotkey_orig_mask); + if (res) + return res; +#endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */ } return (tp_features.hotkey)? 0 : 1; |