2 * Eee PC WMI hotkey driver
4 * Copyright(C) 2010 Intel Corporation.
6 * Portions based on wistron_btns.c:
7 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
8 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
9 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/slab.h>
31 #include <linux/input.h>
32 #include <linux/input/sparse-keymap.h>
33 #include <acpi/acpi_bus.h>
34 #include <acpi/acpi_drivers.h>
36 MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
37 MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
38 MODULE_LICENSE("GPL");
40 #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000"
42 MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
44 #define NOTIFY_BRNUP_MIN 0x11
45 #define NOTIFY_BRNUP_MAX 0x1f
46 #define NOTIFY_BRNDOWN_MIN 0x20
47 #define NOTIFY_BRNDOWN_MAX 0x2e
49 static const struct key_entry eeepc_wmi_keymap[] = {
50 /* Sleep already handled via generic ACPI code */
51 { KE_KEY, 0x5d, { KEY_WLAN } },
52 { KE_KEY, 0x32, { KEY_MUTE } },
53 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
54 { KE_KEY, 0x30, { KEY_VOLUMEUP } },
55 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
56 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
57 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
61 static struct input_dev *eeepc_wmi_input_dev;
63 static void eeepc_wmi_notify(u32 value, void *context)
65 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
66 union acpi_object *obj;
70 status = wmi_get_event_data(value, &response);
71 if (status != AE_OK) {
72 pr_err("EEEPC WMI: bad event status 0x%x\n", status);
76 obj = (union acpi_object *)response.pointer;
78 if (obj && obj->type == ACPI_TYPE_INTEGER) {
79 code = obj->integer.value;
81 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
82 code = NOTIFY_BRNUP_MIN;
83 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
84 code = NOTIFY_BRNDOWN_MIN;
86 if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
88 pr_info("EEEPC WMI: Unknown key %x pressed\n", code);
94 static int eeepc_wmi_input_setup(void)
98 eeepc_wmi_input_dev = input_allocate_device();
99 if (!eeepc_wmi_input_dev)
102 eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
103 eeepc_wmi_input_dev->phys = "wmi/input0";
104 eeepc_wmi_input_dev->id.bustype = BUS_HOST;
106 err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
110 err = input_register_device(eeepc_wmi_input_dev);
112 goto err_free_keymap;
117 sparse_keymap_free(eeepc_wmi_input_dev);
119 input_free_device(eeepc_wmi_input_dev);
123 static int __init eeepc_wmi_init(void)
128 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
129 pr_warning("EEEPC WMI: No known WMI GUID found\n");
133 err = eeepc_wmi_input_setup();
137 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
138 eeepc_wmi_notify, NULL);
139 if (ACPI_FAILURE(status)) {
140 sparse_keymap_free(eeepc_wmi_input_dev);
141 input_unregister_device(eeepc_wmi_input_dev);
142 pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
150 static void __exit eeepc_wmi_exit(void)
152 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
153 sparse_keymap_free(eeepc_wmi_input_dev);
154 input_unregister_device(eeepc_wmi_input_dev);
157 module_init(eeepc_wmi_init);
158 module_exit(eeepc_wmi_exit);