| /* |
| * Dell WMI hotkeys |
| * |
| * Copyright (C) 2008 Red Hat <mjg@redhat.com> |
| * |
| * Portions based on wistron_btns.c: |
| * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> |
| * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> |
| * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/input.h> |
| #include <acpi/acpi_drivers.h> |
| #include <linux/acpi.h> |
| #include <linux/string.h> |
| #include <linux/dmi.h> |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); |
| MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver"); |
| MODULE_LICENSE("GPL"); |
| |
| #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492" |
| |
| static int acpi_video; |
| |
| MODULE_ALIAS("wmi:"DELL_EVENT_GUID); |
| |
| struct key_entry { |
| char type; /* See KE_* below */ |
| u16 code; |
| u16 keycode; |
| }; |
| |
| enum { KE_KEY, KE_SW, KE_IGNORE, KE_END }; |
| |
| /* |
| * Certain keys are flagged as KE_IGNORE. All of these are either |
| * notifications (rather than requests for change) or are also sent |
| * via the keyboard controller so should not be sent again. |
| */ |
| |
| static struct key_entry dell_legacy_wmi_keymap[] = { |
| {KE_KEY, 0xe045, KEY_PROG1}, |
| {KE_KEY, 0xe009, KEY_EJECTCD}, |
| |
| /* These also contain the brightness level at offset 6 */ |
| {KE_KEY, 0xe006, KEY_BRIGHTNESSUP}, |
| {KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN}, |
| |
| /* Battery health status button */ |
| {KE_KEY, 0xe007, KEY_BATTERY}, |
| |
| /* This is actually for all radios. Although physically a |
| * switch, the notification does not provide an indication of |
| * state and so it should be reported as a key */ |
| {KE_KEY, 0xe008, KEY_WLAN}, |
| |
| /* The next device is at offset 6, the active devices are at |
| offset 8 and the attached devices at offset 10 */ |
| {KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE}, |
| |
| {KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE}, |
| |
| /* BIOS error detected */ |
| {KE_IGNORE, 0xe00d, KEY_RESERVED}, |
| |
| /* Wifi Catcher */ |
| {KE_KEY, 0xe011, KEY_PROG2}, |
| |
| /* Ambient light sensor toggle */ |
| {KE_IGNORE, 0xe013, KEY_RESERVED}, |
| |
| {KE_IGNORE, 0xe020, KEY_MUTE}, |
| {KE_IGNORE, 0xe02e, KEY_VOLUMEDOWN}, |
| {KE_IGNORE, 0xe030, KEY_VOLUMEUP}, |
| {KE_IGNORE, 0xe033, KEY_KBDILLUMUP}, |
| {KE_IGNORE, 0xe034, KEY_KBDILLUMDOWN}, |
| {KE_IGNORE, 0xe03a, KEY_CAPSLOCK}, |
| {KE_IGNORE, 0xe045, KEY_NUMLOCK}, |
| {KE_IGNORE, 0xe046, KEY_SCROLLLOCK}, |
| {KE_END, 0} |
| }; |
| |
| static bool dell_new_hk_type; |
| |
| struct dell_new_keymap_entry { |
| u16 scancode; |
| u16 keycode; |
| }; |
| |
| struct dell_hotkey_table { |
| struct dmi_header header; |
| struct dell_new_keymap_entry keymap[]; |
| |
| }; |
| |
| static struct key_entry *dell_new_wmi_keymap; |
| |
| static u16 bios_to_linux_keycode[256] = { |
| |
| KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG, |
| KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, |
| KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE, |
| KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD, |
| KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN, |
| KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE, |
| KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, |
| KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2, |
| KEY_UNKNOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| KEY_PROG3 |
| }; |
| |
| |
| static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap; |
| |
| static struct input_dev *dell_wmi_input_dev; |
| |
| static struct key_entry *dell_wmi_get_entry_by_scancode(int code) |
| { |
| struct key_entry *key; |
| |
| for (key = dell_wmi_keymap; key->type != KE_END; key++) |
| if (code == key->code) |
| return key; |
| |
| return NULL; |
| } |
| |
| static struct key_entry *dell_wmi_get_entry_by_keycode(int keycode) |
| { |
| struct key_entry *key; |
| |
| for (key = dell_wmi_keymap; key->type != KE_END; key++) |
| if (key->type == KE_KEY && keycode == key->keycode) |
| return key; |
| |
| return NULL; |
| } |
| |
| static int dell_wmi_getkeycode(struct input_dev *dev, int scancode, |
| int *keycode) |
| { |
| struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode); |
| |
| if (key && key->type == KE_KEY) { |
| *keycode = key->keycode; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int dell_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) |
| { |
| struct key_entry *key; |
| int old_keycode; |
| |
| if (keycode < 0 || keycode > KEY_MAX) |
| return -EINVAL; |
| |
| key = dell_wmi_get_entry_by_scancode(scancode); |
| if (key && key->type == KE_KEY) { |
| old_keycode = key->keycode; |
| key->keycode = keycode; |
| set_bit(keycode, dev->keybit); |
| if (!dell_wmi_get_entry_by_keycode(old_keycode)) |
| clear_bit(old_keycode, dev->keybit); |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| static void dell_wmi_notify(u32 value, void *context) |
| { |
| struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; |
| static struct key_entry *key; |
| union acpi_object *obj; |
| |
| wmi_get_event_data(value, &response); |
| |
| obj = (union acpi_object *)response.pointer; |
| |
| if (obj && obj->type == ACPI_TYPE_BUFFER) { |
| int reported_key; |
| u16 *buffer_entry = (u16 *)obj->buffer.pointer; |
| if (dell_new_hk_type && (buffer_entry[1] != 0x10)) { |
| printk(KERN_INFO "dell-wmi: Received unknown WMI event" |
| " (0x%x)\n", buffer_entry[1]); |
| return; |
| } |
| |
| if (dell_new_hk_type) |
| reported_key = (int)buffer_entry[2]; |
| else |
| reported_key = (int)buffer_entry[1] & 0xffff; |
| |
| key = dell_wmi_get_entry_by_scancode(reported_key); |
| |
| if (!key) { |
| printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n", |
| reported_key); |
| } else if ((key->keycode == KEY_BRIGHTNESSUP || |
| key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) { |
| /* Don't report brightness notifications that will also |
| * come via ACPI */ |
| return; |
| } else { |
| input_report_key(dell_wmi_input_dev, key->keycode, 1); |
| input_sync(dell_wmi_input_dev); |
| input_report_key(dell_wmi_input_dev, key->keycode, 0); |
| input_sync(dell_wmi_input_dev); |
| } |
| } |
| kfree(obj); |
| } |
| |
| |
| static void setup_new_hk_map(const struct dmi_header *dm) |
| { |
| |
| int i; |
| int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry); |
| struct dell_hotkey_table *table = |
| container_of(dm, struct dell_hotkey_table, header); |
| |
| dell_new_wmi_keymap = kzalloc((hotkey_num+1) * |
| sizeof(struct key_entry), GFP_KERNEL); |
| |
| for (i = 0; i < hotkey_num; i++) { |
| dell_new_wmi_keymap[i].type = KE_KEY; |
| dell_new_wmi_keymap[i].code = table->keymap[i].scancode; |
| dell_new_wmi_keymap[i].keycode = |
| (table->keymap[i].keycode > 255) ? 0 : |
| bios_to_linux_keycode[table->keymap[i].keycode]; |
| } |
| |
| dell_new_wmi_keymap[i].type = KE_END; |
| dell_new_wmi_keymap[i].code = 0; |
| dell_new_wmi_keymap[i].keycode = 0; |
| |
| dell_wmi_keymap = dell_new_wmi_keymap; |
| |
| } |
| |
| |
| static void find_hk_type(const struct dmi_header *dm, void *dummy) |
| { |
| |
| if ((dm->type == 0xb2) && (dm->length > 6)) { |
| dell_new_hk_type = true; |
| setup_new_hk_map(dm); |
| } |
| |
| } |
| |
| |
| static int __init dell_wmi_input_setup(void) |
| { |
| struct key_entry *key; |
| int err; |
| |
| dell_wmi_input_dev = input_allocate_device(); |
| |
| if (!dell_wmi_input_dev) |
| return -ENOMEM; |
| |
| dell_wmi_input_dev->name = "Dell WMI hotkeys"; |
| dell_wmi_input_dev->phys = "wmi/input0"; |
| dell_wmi_input_dev->id.bustype = BUS_HOST; |
| dell_wmi_input_dev->getkeycode = dell_wmi_getkeycode; |
| dell_wmi_input_dev->setkeycode = dell_wmi_setkeycode; |
| |
| for (key = dell_wmi_keymap; key->type != KE_END; key++) { |
| switch (key->type) { |
| case KE_KEY: |
| set_bit(EV_KEY, dell_wmi_input_dev->evbit); |
| set_bit(key->keycode, dell_wmi_input_dev->keybit); |
| break; |
| case KE_SW: |
| set_bit(EV_SW, dell_wmi_input_dev->evbit); |
| set_bit(key->keycode, dell_wmi_input_dev->swbit); |
| break; |
| } |
| } |
| |
| err = input_register_device(dell_wmi_input_dev); |
| |
| if (err) { |
| input_free_device(dell_wmi_input_dev); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int __init dell_wmi_init(void) |
| { |
| int err; |
| acpi_status status; |
| |
| if (wmi_has_guid(DELL_EVENT_GUID)) { |
| printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n"); |
| return -ENODEV; |
| } |
| |
| dmi_walk(find_hk_type, NULL); |
| acpi_video = acpi_video_backlight_support(); |
| |
| err = dell_wmi_input_setup(); |
| if (err) |
| return err; |
| |
| status = wmi_install_notify_handler(DELL_EVENT_GUID, |
| dell_wmi_notify, NULL); |
| if (ACPI_FAILURE(status)) { |
| input_unregister_device(dell_wmi_input_dev); |
| printk(KERN_ERR |
| "dell-wmi: Unable to register notify handler - %d\n", |
| status); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit dell_wmi_exit(void) |
| { |
| wmi_remove_notify_handler(DELL_EVENT_GUID); |
| input_unregister_device(dell_wmi_input_dev); |
| } |
| |
| module_init(dell_wmi_init); |
| module_exit(dell_wmi_exit); |