/* * Dell WMI hotkeys * * Copyright (C) 2008 Red Hat * * Portions based on wistron_btns.c: * Copyright (C) 2005 Miloslav Trmac * Copyright (C) 2005 Bernhard Rosenkraenzer * Copyright (C) 2005 Dmitry Torokhov * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Matthew Garrett "); 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); /* * 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 const struct key_entry dell_wmi_legacy_keymap[] __initconst = { { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } }, { 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 } }, /* Shortcut and audio panel keys */ { KE_IGNORE, 0xe025, { KEY_RESERVED } }, { KE_IGNORE, 0xe026, { KEY_RESERVED } }, { 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_IGNORE, 0xe0f7, { KEY_MUTE } }, { KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } }, { KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } }, { KE_END, 0 } }; static bool dell_new_hk_type; struct dell_bios_keymap_entry { u16 scancode; u16 keycode; }; struct dell_bios_hotkey_table { struct dmi_header header; struct dell_bios_keymap_entry keymap[]; }; static const struct dell_bios_hotkey_table *dell_bios_hotkey_table; static const u16 bios_to_linux_keycode[256] __initconst = { 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 input_dev *dell_wmi_input_dev; static void dell_wmi_notify(u32 value, void *context) { struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; acpi_status status; status = wmi_get_event_data(value, &response); if (status != AE_OK) { pr_info("bad event status 0x%x\n", status); return; } obj = (union acpi_object *)response.pointer; if (obj && obj->type == ACPI_TYPE_BUFFER) { const struct key_entry *key; int reported_key; u16 *buffer_entry = (u16 *)obj->buffer.pointer; if (dell_new_hk_type && (buffer_entry[1] != 0x10)) { pr_info("Received unknown WMI event (0x%x)\n", buffer_entry[1]); kfree(obj); return; } if (dell_new_hk_type || buffer_entry[1] == 0x0) reported_key = (int)buffer_entry[2]; else reported_key = (int)buffer_entry[1] & 0xffff; key = sparse_keymap_entry_from_scancode(dell_wmi_input_dev, reported_key); if (!key) { pr_info("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 */ ; } else { sparse_keymap_report_entry(dell_wmi_input_dev, key, 1, true); } } kfree(obj); } static const struct key_entry * __init dell_wmi_prepare_new_keymap(void) { int hotkey_num = (dell_bios_hotkey_table->header.length - 4) / sizeof(struct dell_bios_keymap_entry); struct key_entry *keymap; int i; keymap = kcalloc(hotkey_num + 1, sizeof(struct key_entry), GFP_KERNEL); if (!keymap) return NULL; for (i = 0; i < hotkey_num; i++) { const struct dell_bios_keymap_entry *bios_entry = &dell_bios_hotkey_table->keymap[i]; keymap[i].type = KE_KEY; keymap[i].code = bios_entry->scancode; keymap[i].keycode = bios_entry->keycode < 256 ? bios_to_linux_keycode[bios_entry->keycode] : KEY_RESERVED; } keymap[hotkey_num].type = KE_END; return keymap; } static int __init dell_wmi_input_setup(void) { 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; if (dell_new_hk_type) { const struct key_entry *keymap = dell_wmi_prepare_new_keymap(); if (!keymap) { err = -ENOMEM; goto err_free_dev; } err = sparse_keymap_setup(dell_wmi_input_dev, keymap, NULL); /* * Sparse keymap library makes a copy of keymap so we * don't need the original one that was allocated. */ kfree(keymap); } else { err = sparse_keymap_setup(dell_wmi_input_dev, dell_wmi_legacy_keymap, NULL); } if (err) goto err_free_dev; err = input_register_device(dell_wmi_input_dev); if (err) goto err_free_keymap; return 0; err_free_keymap: sparse_keymap_free(dell_wmi_input_dev); err_free_dev: input_free_device(dell_wmi_input_dev); return err; } static void dell_wmi_input_destroy(void) { sparse_keymap_free(dell_wmi_input_dev); input_unregister_device(dell_wmi_input_dev); } static void __init find_hk_type(const struct dmi_header *dm, void *dummy) { if (dm->type == 0xb2 && dm->length > 6) { dell_new_hk_type = true; dell_bios_hotkey_table = container_of(dm, struct dell_bios_hotkey_table, header); } } static int __init dell_wmi_init(void) { int err; acpi_status status; if (!wmi_has_guid(DELL_EVENT_GUID)) { pr_warn("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)) { dell_wmi_input_destroy(); pr_err("Unable to register notify handler - %d\n", status); return -ENODEV; } return 0; } module_init(dell_wmi_init); static void __exit dell_wmi_exit(void) { wmi_remove_notify_handler(DELL_EVENT_GUID); dell_wmi_input_destroy(); } module_exit(dell_wmi_exit);