/* * 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 */ #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" 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_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_DISPLAYTOGGLE}, {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 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 *buffer = (int *)obj->buffer.pointer; /* * The upper bytes of the event may contain * additional information, so mask them off for the * scancode lookup */ key = dell_wmi_get_entry_by_scancode(buffer[1] & 0xFFFF); if (key) { 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); } else if (buffer[1] & 0xFFFF) printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n", buffer[1] & 0xFFFF); } } 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; if (wmi_has_guid(DELL_EVENT_GUID)) { err = dell_wmi_input_setup(); if (err) return err; err = wmi_install_notify_handler(DELL_EVENT_GUID, dell_wmi_notify, NULL); if (err) { input_unregister_device(dell_wmi_input_dev); printk(KERN_ERR "dell-wmi: Unable to register" " notify handler - %d\n", err); return err; } } else printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n"); return 0; } static void __exit dell_wmi_exit(void) { if (wmi_has_guid(DELL_EVENT_GUID)) { wmi_remove_notify_handler(DELL_EVENT_GUID); input_unregister_device(dell_wmi_input_dev); } } module_init(dell_wmi_init); module_exit(dell_wmi_exit);