4 * Copyright (C) 2009 Novell <trenn@suse.de>
6 * Most stuff taken over from hp-wmi
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/kernel.h>
26 #include <linux/input.h>
27 #include <linux/acpi.h>
28 #include <linux/backlight.h>
30 MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
31 MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
32 MODULE_LICENSE("GPL");
34 MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
35 MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
37 /* Temporary workaround until the WMI sysfs interface goes in
38 { "svn", DMI_SYS_VENDOR },
39 { "pn", DMI_PRODUCT_NAME },
40 { "pvr", DMI_PRODUCT_VERSION },
41 { "rvn", DMI_BOARD_VENDOR },
42 { "rn", DMI_BOARD_NAME },
45 MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*");
47 #define DRV_NAME "msi-wmi"
48 #define DRV_PFX DRV_NAME ": "
50 #define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
51 #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
53 #define dprintk(msg...) pr_debug(DRV_PFX msg)
56 char type; /* See KE_* below */
64 * KE_KEY the only used key type, but keep this, others might also
65 * show up in the future. Compare with hp-wmi.c
67 enum { KE_KEY, KE_END };
69 static struct key_entry msi_wmi_keymap[] = {
70 { KE_KEY, 0xd0, KEY_BRIGHTNESSUP, 0, {0, } },
71 { KE_KEY, 0xd1, KEY_BRIGHTNESSDOWN, 1, {0, } },
72 { KE_KEY, 0xd2, KEY_VOLUMEUP, 2, {0, } },
73 { KE_KEY, 0xd3, KEY_VOLUMEDOWN, 3, {0, } },
77 struct backlight_device *backlight;
79 static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
81 static struct input_dev *msi_wmi_input_dev;
83 static int msi_wmi_query_block(int instance, int *ret)
86 union acpi_object *obj;
88 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
90 status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
94 if (!obj || obj->type != ACPI_TYPE_INTEGER) {
96 printk(KERN_ERR DRV_PFX "query block returned object "
97 "type: %d - buffer length:%d\n", obj->type,
98 obj->type == ACPI_TYPE_BUFFER ?
99 obj->buffer.length : 0);
104 *ret = obj->integer.value;
109 static int msi_wmi_set_block(int instance, int value)
113 struct acpi_buffer input = { sizeof(int), &value };
115 dprintk("Going to set block of instance: %d - value: %d\n",
118 status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
120 return ACPI_SUCCESS(status) ? 0 : 1;
123 static int bl_get(struct backlight_device *bd)
125 int level, err, ret = 0;
127 /* Instance 1 is "get backlight", cmp with DSDT */
128 err = msi_wmi_query_block(1, &ret);
130 printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err);
131 dprintk("Get: Query block returned: %d\n", ret);
132 for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
133 if (backlight_map[level] == ret) {
134 dprintk("Current backlight level: 0x%X - index: %d\n",
135 backlight_map[level], level);
139 if (level == ARRAY_SIZE(backlight_map)) {
140 printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n",
147 static int bl_set_status(struct backlight_device *bd)
149 int bright = bd->props.brightness;
150 if (bright >= ARRAY_SIZE(backlight_map) || bright < 0)
153 /* Instance 0 is "set backlight" */
154 return msi_wmi_set_block(0, backlight_map[bright]);
157 static struct backlight_ops msi_backlight_ops = {
158 .get_brightness = bl_get,
159 .update_status = bl_set_status,
162 static struct key_entry *msi_wmi_get_entry_by_scancode(int code)
164 struct key_entry *key;
166 for (key = msi_wmi_keymap; key->type != KE_END; key++)
167 if (code == key->code)
173 static struct key_entry *msi_wmi_get_entry_by_keycode(int keycode)
175 struct key_entry *key;
177 for (key = msi_wmi_keymap; key->type != KE_END; key++)
178 if (key->type == KE_KEY && keycode == key->keycode)
184 static int msi_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
186 struct key_entry *key = msi_wmi_get_entry_by_scancode(scancode);
188 if (key && key->type == KE_KEY) {
189 *keycode = key->keycode;
196 static int msi_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
198 struct key_entry *key;
201 if (keycode < 0 || keycode > KEY_MAX)
204 key = msi_wmi_get_entry_by_scancode(scancode);
205 if (key && key->type == KE_KEY) {
206 old_keycode = key->keycode;
207 key->keycode = keycode;
208 set_bit(keycode, dev->keybit);
209 if (!msi_wmi_get_entry_by_keycode(old_keycode))
210 clear_bit(old_keycode, dev->keybit);
217 static void msi_wmi_notify(u32 value, void *context)
219 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
220 static struct key_entry *key;
221 union acpi_object *obj;
224 wmi_get_event_data(value, &response);
226 obj = (union acpi_object *)response.pointer;
228 if (obj && obj->type == ACPI_TYPE_INTEGER) {
229 int eventcode = obj->integer.value;
230 dprintk("Eventcode: 0x%x\n", eventcode);
231 key = msi_wmi_get_entry_by_scancode(eventcode);
233 cur = ktime_get_real();
234 /* Ignore event if the same event happened in a 50 ms
235 timeframe -> Key press may result in 10-20 GPEs */
236 if (ktime_to_us(ktime_sub(cur, key->last_pressed))
238 dprintk("Suppressed key event 0x%X - "
239 "Last press was %lld us ago\n",
241 ktime_to_us(ktime_sub(cur,
242 key->last_pressed)));
245 key->last_pressed = cur;
249 /* Brightness is served via acpi video driver */
251 (key->keycode == KEY_BRIGHTNESSUP ||
252 key->keycode == KEY_BRIGHTNESSDOWN))
255 dprintk("Send key: 0x%X - "
256 "Input layer keycode: %d\n", key->code,
258 input_report_key(msi_wmi_input_dev,
260 input_sync(msi_wmi_input_dev);
261 input_report_key(msi_wmi_input_dev,
263 input_sync(msi_wmi_input_dev);
267 printk(KERN_INFO "Unknown key pressed - %x\n",
270 printk(KERN_INFO DRV_PFX "Unknown event received\n");
271 kfree(response.pointer);
274 static int __init msi_wmi_input_setup(void)
276 struct key_entry *key;
279 msi_wmi_input_dev = input_allocate_device();
280 if (!msi_wmi_input_dev)
283 msi_wmi_input_dev->name = "MSI WMI hotkeys";
284 msi_wmi_input_dev->phys = "wmi/input0";
285 msi_wmi_input_dev->id.bustype = BUS_HOST;
286 msi_wmi_input_dev->getkeycode = msi_wmi_getkeycode;
287 msi_wmi_input_dev->setkeycode = msi_wmi_setkeycode;
289 for (key = msi_wmi_keymap; key->type != KE_END; key++) {
292 set_bit(EV_KEY, msi_wmi_input_dev->evbit);
293 set_bit(key->keycode, msi_wmi_input_dev->keybit);
298 err = input_register_device(msi_wmi_input_dev);
301 input_free_device(msi_wmi_input_dev);
308 static int __init msi_wmi_init(void)
312 if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
314 "This machine doesn't have MSI-hotkeys through WMI\n");
317 err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
318 msi_wmi_notify, NULL);
322 err = msi_wmi_input_setup();
324 goto err_uninstall_notifier;
326 if (!acpi_video_backlight_support()) {
327 backlight = backlight_device_register(DRV_NAME,
328 NULL, NULL, &msi_backlight_ops);
329 if (IS_ERR(backlight))
332 backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
335 goto err_free_backlight;
337 backlight->props.brightness = err;
339 dprintk("Event handler installed\n");
344 backlight_device_unregister(backlight);
346 input_unregister_device(msi_wmi_input_dev);
347 err_uninstall_notifier:
348 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
352 static void __exit msi_wmi_exit(void)
354 if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
355 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
356 input_unregister_device(msi_wmi_input_dev);
357 backlight_device_unregister(backlight);
361 module_init(msi_wmi_init);
362 module_exit(msi_wmi_exit);