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d12d8baf TR |
1 | /* |
2 | * MSI WMI hotkeys | |
3 | * | |
4 | * Copyright (C) 2009 Novell <trenn@suse.de> | |
5 | * | |
6 | * Most stuff taken over from hp-wmi | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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 | |
21 | */ | |
22 | ||
23 | ||
24 | ||
25 | #include <linux/kernel.h> | |
d12d8baf | 26 | #include <linux/input.h> |
d12d8baf | 27 | #include <linux/acpi.h> |
d12d8baf TR |
28 | #include <linux/backlight.h> |
29 | ||
30 | MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>"); | |
31 | MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
d12d8baf TR |
34 | MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45"); |
35 | MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"); | |
36 | ||
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 }, | |
43 | */ | |
44 | ||
45 | MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*"); | |
46 | ||
47 | #define DRV_NAME "msi-wmi" | |
48 | #define DRV_PFX DRV_NAME ": " | |
49 | ||
50 | #define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45" | |
51 | #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2" | |
52 | ||
822ddc04 | 53 | #define dprintk(msg...) pr_debug(DRV_PFX msg) |
d12d8baf TR |
54 | |
55 | struct key_entry { | |
56 | char type; /* See KE_* below */ | |
57 | u16 code; | |
58 | u16 keycode; | |
d12d8baf TR |
59 | ktime_t last_pressed; |
60 | }; | |
61 | ||
62 | /* | |
63 | * KE_KEY the only used key type, but keep this, others might also | |
64 | * show up in the future. Compare with hp-wmi.c | |
65 | */ | |
66 | enum { KE_KEY, KE_END }; | |
67 | ||
68 | static struct key_entry msi_wmi_keymap[] = { | |
977f9b92 AA |
69 | { KE_KEY, 0xd0, KEY_BRIGHTNESSUP, {0, } }, |
70 | { KE_KEY, 0xd1, KEY_BRIGHTNESSDOWN, {0, } }, | |
71 | { KE_KEY, 0xd2, KEY_VOLUMEUP, {0, } }, | |
72 | { KE_KEY, 0xd3, KEY_VOLUMEDOWN, {0, } }, | |
d12d8baf TR |
73 | { KE_END, 0} |
74 | }; | |
75 | ||
76 | struct backlight_device *backlight; | |
77 | ||
78 | static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF }; | |
79 | ||
80 | static struct input_dev *msi_wmi_input_dev; | |
81 | ||
82 | static int msi_wmi_query_block(int instance, int *ret) | |
83 | { | |
84 | acpi_status status; | |
85 | union acpi_object *obj; | |
86 | ||
87 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
88 | ||
89 | status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output); | |
90 | ||
91 | obj = output.pointer; | |
92 | ||
93 | if (!obj || obj->type != ACPI_TYPE_INTEGER) { | |
94 | if (obj) { | |
95 | printk(KERN_ERR DRV_PFX "query block returned object " | |
96 | "type: %d - buffer length:%d\n", obj->type, | |
97 | obj->type == ACPI_TYPE_BUFFER ? | |
98 | obj->buffer.length : 0); | |
99 | } | |
100 | kfree(obj); | |
101 | return -EINVAL; | |
102 | } | |
103 | *ret = obj->integer.value; | |
104 | kfree(obj); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int msi_wmi_set_block(int instance, int value) | |
109 | { | |
110 | acpi_status status; | |
111 | ||
112 | struct acpi_buffer input = { sizeof(int), &value }; | |
113 | ||
114 | dprintk("Going to set block of instance: %d - value: %d\n", | |
115 | instance, value); | |
116 | ||
117 | status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input); | |
118 | ||
119 | return ACPI_SUCCESS(status) ? 0 : 1; | |
120 | } | |
121 | ||
122 | static int bl_get(struct backlight_device *bd) | |
123 | { | |
124 | int level, err, ret = 0; | |
125 | ||
126 | /* Instance 1 is "get backlight", cmp with DSDT */ | |
127 | err = msi_wmi_query_block(1, &ret); | |
128 | if (err) | |
129 | printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err); | |
130 | dprintk("Get: Query block returned: %d\n", ret); | |
131 | for (level = 0; level < ARRAY_SIZE(backlight_map); level++) { | |
132 | if (backlight_map[level] == ret) { | |
133 | dprintk("Current backlight level: 0x%X - index: %d\n", | |
134 | backlight_map[level], level); | |
135 | break; | |
136 | } | |
137 | } | |
138 | if (level == ARRAY_SIZE(backlight_map)) { | |
139 | printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n", | |
140 | ret); | |
141 | return -EINVAL; | |
142 | } | |
143 | return level; | |
144 | } | |
145 | ||
146 | static int bl_set_status(struct backlight_device *bd) | |
147 | { | |
148 | int bright = bd->props.brightness; | |
149 | if (bright >= ARRAY_SIZE(backlight_map) || bright < 0) | |
150 | return -EINVAL; | |
151 | ||
152 | /* Instance 0 is "set backlight" */ | |
153 | return msi_wmi_set_block(0, backlight_map[bright]); | |
154 | } | |
155 | ||
156 | static struct backlight_ops msi_backlight_ops = { | |
157 | .get_brightness = bl_get, | |
158 | .update_status = bl_set_status, | |
159 | }; | |
160 | ||
161 | static struct key_entry *msi_wmi_get_entry_by_scancode(int code) | |
162 | { | |
163 | struct key_entry *key; | |
164 | ||
165 | for (key = msi_wmi_keymap; key->type != KE_END; key++) | |
166 | if (code == key->code) | |
167 | return key; | |
168 | ||
169 | return NULL; | |
170 | } | |
171 | ||
172 | static struct key_entry *msi_wmi_get_entry_by_keycode(int keycode) | |
173 | { | |
174 | struct key_entry *key; | |
175 | ||
176 | for (key = msi_wmi_keymap; key->type != KE_END; key++) | |
177 | if (key->type == KE_KEY && keycode == key->keycode) | |
178 | return key; | |
179 | ||
180 | return NULL; | |
181 | } | |
182 | ||
183 | static int msi_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) | |
184 | { | |
185 | struct key_entry *key = msi_wmi_get_entry_by_scancode(scancode); | |
186 | ||
187 | if (key && key->type == KE_KEY) { | |
188 | *keycode = key->keycode; | |
189 | return 0; | |
190 | } | |
191 | ||
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | static int msi_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) | |
196 | { | |
197 | struct key_entry *key; | |
198 | int old_keycode; | |
199 | ||
200 | if (keycode < 0 || keycode > KEY_MAX) | |
201 | return -EINVAL; | |
202 | ||
203 | key = msi_wmi_get_entry_by_scancode(scancode); | |
204 | if (key && key->type == KE_KEY) { | |
205 | old_keycode = key->keycode; | |
206 | key->keycode = keycode; | |
207 | set_bit(keycode, dev->keybit); | |
208 | if (!msi_wmi_get_entry_by_keycode(old_keycode)) | |
209 | clear_bit(old_keycode, dev->keybit); | |
210 | return 0; | |
211 | } | |
212 | ||
213 | return -EINVAL; | |
214 | } | |
215 | ||
216 | static void msi_wmi_notify(u32 value, void *context) | |
217 | { | |
218 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
219 | static struct key_entry *key; | |
220 | union acpi_object *obj; | |
221 | ktime_t cur; | |
222 | ||
223 | wmi_get_event_data(value, &response); | |
224 | ||
225 | obj = (union acpi_object *)response.pointer; | |
226 | ||
227 | if (obj && obj->type == ACPI_TYPE_INTEGER) { | |
228 | int eventcode = obj->integer.value; | |
229 | dprintk("Eventcode: 0x%x\n", eventcode); | |
230 | key = msi_wmi_get_entry_by_scancode(eventcode); | |
231 | if (key) { | |
232 | cur = ktime_get_real(); | |
233 | /* Ignore event if the same event happened in a 50 ms | |
234 | timeframe -> Key press may result in 10-20 GPEs */ | |
235 | if (ktime_to_us(ktime_sub(cur, key->last_pressed)) | |
236 | < 1000 * 50) { | |
237 | dprintk("Suppressed key event 0x%X - " | |
238 | "Last press was %lld us ago\n", | |
239 | key->code, | |
240 | ktime_to_us(ktime_sub(cur, | |
241 | key->last_pressed))); | |
242 | return; | |
243 | } | |
244 | key->last_pressed = cur; | |
245 | ||
d607af93 AA |
246 | if (key->type == KE_KEY && |
247 | /* Brightness is served via acpi video driver */ | |
248 | (backlight || (key->keycode != KEY_BRIGHTNESSUP && | |
249 | key->keycode != KEY_BRIGHTNESSDOWN))) { | |
d12d8baf TR |
250 | dprintk("Send key: 0x%X - " |
251 | "Input layer keycode: %d\n", key->code, | |
252 | key->keycode); | |
253 | input_report_key(msi_wmi_input_dev, | |
254 | key->keycode, 1); | |
255 | input_sync(msi_wmi_input_dev); | |
256 | input_report_key(msi_wmi_input_dev, | |
257 | key->keycode, 0); | |
258 | input_sync(msi_wmi_input_dev); | |
d12d8baf TR |
259 | } |
260 | } else | |
261 | printk(KERN_INFO "Unknown key pressed - %x\n", | |
262 | eventcode); | |
263 | } else | |
264 | printk(KERN_INFO DRV_PFX "Unknown event received\n"); | |
265 | kfree(response.pointer); | |
266 | } | |
267 | ||
268 | static int __init msi_wmi_input_setup(void) | |
269 | { | |
270 | struct key_entry *key; | |
271 | int err; | |
272 | ||
273 | msi_wmi_input_dev = input_allocate_device(); | |
46b51eb9 AA |
274 | if (!msi_wmi_input_dev) |
275 | return -ENOMEM; | |
d12d8baf TR |
276 | |
277 | msi_wmi_input_dev->name = "MSI WMI hotkeys"; | |
278 | msi_wmi_input_dev->phys = "wmi/input0"; | |
279 | msi_wmi_input_dev->id.bustype = BUS_HOST; | |
280 | msi_wmi_input_dev->getkeycode = msi_wmi_getkeycode; | |
281 | msi_wmi_input_dev->setkeycode = msi_wmi_setkeycode; | |
282 | ||
283 | for (key = msi_wmi_keymap; key->type != KE_END; key++) { | |
284 | switch (key->type) { | |
285 | case KE_KEY: | |
286 | set_bit(EV_KEY, msi_wmi_input_dev->evbit); | |
287 | set_bit(key->keycode, msi_wmi_input_dev->keybit); | |
288 | break; | |
289 | } | |
290 | } | |
291 | ||
292 | err = input_register_device(msi_wmi_input_dev); | |
293 | ||
294 | if (err) { | |
295 | input_free_device(msi_wmi_input_dev); | |
296 | return err; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int __init msi_wmi_init(void) | |
303 | { | |
304 | int err; | |
305 | ||
46b51eb9 AA |
306 | if (!wmi_has_guid(MSIWMI_EVENT_GUID)) { |
307 | printk(KERN_ERR | |
308 | "This machine doesn't have MSI-hotkeys through WMI\n"); | |
309 | return -ENODEV; | |
310 | } | |
311 | err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, | |
312 | msi_wmi_notify, NULL); | |
313 | if (err) | |
314 | return -EINVAL; | |
d12d8baf | 315 | |
46b51eb9 AA |
316 | err = msi_wmi_input_setup(); |
317 | if (err) | |
318 | goto err_uninstall_notifier; | |
d12d8baf | 319 | |
46b51eb9 AA |
320 | if (!acpi_video_backlight_support()) { |
321 | backlight = backlight_device_register(DRV_NAME, | |
322 | NULL, NULL, &msi_backlight_ops); | |
323 | if (IS_ERR(backlight)) | |
324 | goto err_free_input; | |
325 | ||
326 | backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1; | |
327 | err = bl_get(NULL); | |
328 | if (err < 0) | |
329 | goto err_free_backlight; | |
330 | ||
331 | backlight->props.brightness = err; | |
d12d8baf | 332 | } |
822ddc04 | 333 | dprintk("Event handler installed\n"); |
46b51eb9 | 334 | |
d12d8baf | 335 | return 0; |
46b51eb9 AA |
336 | |
337 | err_free_backlight: | |
338 | backlight_device_unregister(backlight); | |
339 | err_free_input: | |
340 | input_unregister_device(msi_wmi_input_dev); | |
341 | err_uninstall_notifier: | |
342 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
343 | return err; | |
d12d8baf TR |
344 | } |
345 | ||
346 | static void __exit msi_wmi_exit(void) | |
347 | { | |
348 | if (wmi_has_guid(MSIWMI_EVENT_GUID)) { | |
349 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
350 | input_unregister_device(msi_wmi_input_dev); | |
351 | backlight_device_unregister(backlight); | |
352 | } | |
353 | } | |
354 | ||
355 | module_init(msi_wmi_init); | |
356 | module_exit(msi_wmi_exit); |