Commit | Line | Data |
---|---|---|
62ec30d4 MG |
1 | /* |
2 | * HP WMI hotkeys | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat <mjg@redhat.com> | |
5 | * | |
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> | |
10 | * | |
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. | |
15 | * | |
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. | |
20 | * | |
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 | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/input.h> | |
31 | #include <acpi/acpi_drivers.h> | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/acpi.h> | |
34 | #include <linux/rfkill.h> | |
35 | #include <linux/string.h> | |
36 | ||
37 | MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>"); | |
38 | MODULE_DESCRIPTION("HP laptop WMI hotkeys driver"); | |
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); | |
42 | MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); | |
43 | ||
44 | #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" | |
45 | #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4" | |
46 | ||
47 | #define HPWMI_DISPLAY_QUERY 0x1 | |
48 | #define HPWMI_HDDTEMP_QUERY 0x2 | |
49 | #define HPWMI_ALS_QUERY 0x3 | |
50 | #define HPWMI_DOCK_QUERY 0x4 | |
51 | #define HPWMI_WIRELESS_QUERY 0x5 | |
a8823aef | 52 | #define HPWMI_HOTKEY_QUERY 0xc |
62ec30d4 MG |
53 | |
54 | static int __init hp_wmi_bios_setup(struct platform_device *device); | |
55 | static int __exit hp_wmi_bios_remove(struct platform_device *device); | |
4c395bdd | 56 | static int hp_wmi_resume_handler(struct platform_device *device); |
62ec30d4 MG |
57 | |
58 | struct bios_args { | |
59 | u32 signature; | |
60 | u32 command; | |
61 | u32 commandtype; | |
62 | u32 datasize; | |
63 | u32 data; | |
64 | }; | |
65 | ||
66 | struct bios_return { | |
67 | u32 sigpass; | |
68 | u32 return_code; | |
69 | u32 value; | |
70 | }; | |
71 | ||
72 | struct key_entry { | |
73 | char type; /* See KE_* below */ | |
a8823aef | 74 | u16 code; |
62ec30d4 MG |
75 | u16 keycode; |
76 | }; | |
77 | ||
78 | enum { KE_KEY, KE_SW, KE_END }; | |
79 | ||
80 | static struct key_entry hp_wmi_keymap[] = { | |
81 | {KE_SW, 0x01, SW_DOCK}, | |
82 | {KE_KEY, 0x02, KEY_BRIGHTNESSUP}, | |
83 | {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN}, | |
a8823aef MG |
84 | {KE_KEY, 0x20e6, KEY_PROG1}, |
85 | {KE_KEY, 0x2142, KEY_MEDIA}, | |
5c624841 | 86 | {KE_KEY, 0x213b, KEY_INFO}, |
a8823aef | 87 | {KE_KEY, 0x231b, KEY_HELP}, |
62ec30d4 MG |
88 | {KE_END, 0} |
89 | }; | |
90 | ||
91 | static struct input_dev *hp_wmi_input_dev; | |
92 | static struct platform_device *hp_wmi_platform_dev; | |
93 | ||
94 | static struct rfkill *wifi_rfkill; | |
95 | static struct rfkill *bluetooth_rfkill; | |
96 | static struct rfkill *wwan_rfkill; | |
97 | ||
98 | static struct platform_driver hp_wmi_driver = { | |
99 | .driver = { | |
100 | .name = "hp-wmi", | |
101 | .owner = THIS_MODULE, | |
102 | }, | |
103 | .probe = hp_wmi_bios_setup, | |
104 | .remove = hp_wmi_bios_remove, | |
4c395bdd | 105 | .resume = hp_wmi_resume_handler, |
62ec30d4 MG |
106 | }; |
107 | ||
108 | static int hp_wmi_perform_query(int query, int write, int value) | |
109 | { | |
110 | struct bios_return bios_return; | |
111 | acpi_status status; | |
112 | union acpi_object *obj; | |
113 | struct bios_args args = { | |
114 | .signature = 0x55434553, | |
115 | .command = write ? 0x2 : 0x1, | |
116 | .commandtype = query, | |
117 | .datasize = write ? 0x4 : 0, | |
118 | .data = value, | |
119 | }; | |
120 | struct acpi_buffer input = { sizeof(struct bios_args), &args }; | |
121 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
122 | ||
123 | status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output); | |
124 | ||
125 | obj = output.pointer; | |
126 | ||
127 | if (!obj || obj->type != ACPI_TYPE_BUFFER) | |
128 | return -EINVAL; | |
129 | ||
130 | bios_return = *((struct bios_return *)obj->buffer.pointer); | |
131 | if (bios_return.return_code > 0) | |
132 | return bios_return.return_code * -1; | |
133 | else | |
134 | return bios_return.value; | |
135 | } | |
136 | ||
137 | static int hp_wmi_display_state(void) | |
138 | { | |
139 | return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0); | |
140 | } | |
141 | ||
142 | static int hp_wmi_hddtemp_state(void) | |
143 | { | |
144 | return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0); | |
145 | } | |
146 | ||
147 | static int hp_wmi_als_state(void) | |
148 | { | |
149 | return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0); | |
150 | } | |
151 | ||
152 | static int hp_wmi_dock_state(void) | |
153 | { | |
154 | return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0); | |
155 | } | |
156 | ||
157 | static int hp_wmi_wifi_set(void *data, enum rfkill_state state) | |
158 | { | |
159 | if (state) | |
160 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101); | |
161 | else | |
162 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100); | |
163 | } | |
164 | ||
165 | static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state) | |
166 | { | |
167 | if (state) | |
168 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202); | |
169 | else | |
170 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200); | |
171 | } | |
172 | ||
173 | static int hp_wmi_wwan_set(void *data, enum rfkill_state state) | |
174 | { | |
175 | if (state) | |
176 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404); | |
177 | else | |
178 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400); | |
179 | } | |
180 | ||
181 | static int hp_wmi_wifi_state(void) | |
182 | { | |
183 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
184 | ||
185 | if (wireless & 0x100) | |
3f6e2f13 | 186 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 187 | else |
3f6e2f13 | 188 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
189 | } |
190 | ||
191 | static int hp_wmi_bluetooth_state(void) | |
192 | { | |
193 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
194 | ||
195 | if (wireless & 0x10000) | |
3f6e2f13 | 196 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 197 | else |
3f6e2f13 | 198 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
199 | } |
200 | ||
201 | static int hp_wmi_wwan_state(void) | |
202 | { | |
203 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
204 | ||
205 | if (wireless & 0x1000000) | |
3f6e2f13 | 206 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 207 | else |
3f6e2f13 | 208 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
209 | } |
210 | ||
211 | static ssize_t show_display(struct device *dev, struct device_attribute *attr, | |
212 | char *buf) | |
213 | { | |
214 | int value = hp_wmi_display_state(); | |
215 | if (value < 0) | |
216 | return -EINVAL; | |
217 | return sprintf(buf, "%d\n", value); | |
218 | } | |
219 | ||
220 | static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr, | |
221 | char *buf) | |
222 | { | |
223 | int value = hp_wmi_hddtemp_state(); | |
224 | if (value < 0) | |
225 | return -EINVAL; | |
226 | return sprintf(buf, "%d\n", value); | |
227 | } | |
228 | ||
229 | static ssize_t show_als(struct device *dev, struct device_attribute *attr, | |
230 | char *buf) | |
231 | { | |
232 | int value = hp_wmi_als_state(); | |
233 | if (value < 0) | |
234 | return -EINVAL; | |
235 | return sprintf(buf, "%d\n", value); | |
236 | } | |
237 | ||
238 | static ssize_t show_dock(struct device *dev, struct device_attribute *attr, | |
239 | char *buf) | |
240 | { | |
241 | int value = hp_wmi_dock_state(); | |
242 | if (value < 0) | |
243 | return -EINVAL; | |
244 | return sprintf(buf, "%d\n", value); | |
245 | } | |
246 | ||
247 | static ssize_t set_als(struct device *dev, struct device_attribute *attr, | |
248 | const char *buf, size_t count) | |
249 | { | |
250 | u32 tmp = simple_strtoul(buf, NULL, 10); | |
251 | hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp); | |
252 | return count; | |
253 | } | |
254 | ||
255 | static DEVICE_ATTR(display, S_IRUGO, show_display, NULL); | |
256 | static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL); | |
257 | static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als); | |
258 | static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL); | |
259 | ||
260 | static struct key_entry *hp_wmi_get_entry_by_scancode(int code) | |
261 | { | |
262 | struct key_entry *key; | |
263 | ||
264 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
265 | if (code == key->code) | |
266 | return key; | |
267 | ||
268 | return NULL; | |
269 | } | |
270 | ||
271 | static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode) | |
272 | { | |
273 | struct key_entry *key; | |
274 | ||
275 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
276 | if (key->type == KE_KEY && keycode == key->keycode) | |
277 | return key; | |
278 | ||
279 | return NULL; | |
280 | } | |
281 | ||
282 | static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) | |
283 | { | |
284 | struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode); | |
285 | ||
286 | if (key && key->type == KE_KEY) { | |
287 | *keycode = key->keycode; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | return -EINVAL; | |
292 | } | |
293 | ||
294 | static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) | |
295 | { | |
296 | struct key_entry *key; | |
297 | int old_keycode; | |
298 | ||
299 | if (keycode < 0 || keycode > KEY_MAX) | |
300 | return -EINVAL; | |
301 | ||
302 | key = hp_wmi_get_entry_by_scancode(scancode); | |
303 | if (key && key->type == KE_KEY) { | |
304 | old_keycode = key->keycode; | |
305 | key->keycode = keycode; | |
306 | set_bit(keycode, dev->keybit); | |
307 | if (!hp_wmi_get_entry_by_keycode(old_keycode)) | |
308 | clear_bit(old_keycode, dev->keybit); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | return -EINVAL; | |
313 | } | |
314 | ||
88429a10 | 315 | static void hp_wmi_notify(u32 value, void *context) |
62ec30d4 MG |
316 | { |
317 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
318 | static struct key_entry *key; | |
319 | union acpi_object *obj; | |
320 | ||
321 | wmi_get_event_data(value, &response); | |
322 | ||
323 | obj = (union acpi_object *)response.pointer; | |
324 | ||
325 | if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) { | |
326 | int eventcode = *((u8 *) obj->buffer.pointer); | |
a8823aef MG |
327 | if (eventcode == 0x4) |
328 | eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, | |
329 | 0); | |
62ec30d4 MG |
330 | key = hp_wmi_get_entry_by_scancode(eventcode); |
331 | if (key) { | |
332 | switch (key->type) { | |
333 | case KE_KEY: | |
334 | input_report_key(hp_wmi_input_dev, | |
335 | key->keycode, 1); | |
336 | input_sync(hp_wmi_input_dev); | |
337 | input_report_key(hp_wmi_input_dev, | |
338 | key->keycode, 0); | |
339 | input_sync(hp_wmi_input_dev); | |
340 | break; | |
341 | case KE_SW: | |
342 | input_report_switch(hp_wmi_input_dev, | |
343 | key->keycode, | |
344 | hp_wmi_dock_state()); | |
345 | input_sync(hp_wmi_input_dev); | |
346 | break; | |
347 | } | |
348 | } else if (eventcode == 0x5) { | |
349 | if (wifi_rfkill) | |
3f6e2f13 MG |
350 | rfkill_force_state(wifi_rfkill, |
351 | hp_wmi_wifi_state()); | |
62ec30d4 | 352 | if (bluetooth_rfkill) |
3f6e2f13 MG |
353 | rfkill_force_state(bluetooth_rfkill, |
354 | hp_wmi_bluetooth_state()); | |
62ec30d4 | 355 | if (wwan_rfkill) |
3f6e2f13 MG |
356 | rfkill_force_state(wwan_rfkill, |
357 | hp_wmi_wwan_state()); | |
62ec30d4 MG |
358 | } else |
359 | printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n", | |
360 | eventcode); | |
361 | } else | |
362 | printk(KERN_INFO "HP WMI: Unknown response received\n"); | |
363 | } | |
364 | ||
365 | static int __init hp_wmi_input_setup(void) | |
366 | { | |
367 | struct key_entry *key; | |
368 | int err; | |
369 | ||
370 | hp_wmi_input_dev = input_allocate_device(); | |
371 | ||
372 | hp_wmi_input_dev->name = "HP WMI hotkeys"; | |
373 | hp_wmi_input_dev->phys = "wmi/input0"; | |
374 | hp_wmi_input_dev->id.bustype = BUS_HOST; | |
375 | hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode; | |
376 | hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode; | |
377 | ||
378 | for (key = hp_wmi_keymap; key->type != KE_END; key++) { | |
379 | switch (key->type) { | |
380 | case KE_KEY: | |
381 | set_bit(EV_KEY, hp_wmi_input_dev->evbit); | |
382 | set_bit(key->keycode, hp_wmi_input_dev->keybit); | |
383 | break; | |
384 | case KE_SW: | |
385 | set_bit(EV_SW, hp_wmi_input_dev->evbit); | |
386 | set_bit(key->keycode, hp_wmi_input_dev->swbit); | |
3095eb87 FP |
387 | |
388 | /* Set initial dock state */ | |
389 | input_report_switch(hp_wmi_input_dev, key->keycode, | |
390 | hp_wmi_dock_state()); | |
391 | input_sync(hp_wmi_input_dev); | |
62ec30d4 MG |
392 | break; |
393 | } | |
394 | } | |
395 | ||
396 | err = input_register_device(hp_wmi_input_dev); | |
397 | ||
398 | if (err) { | |
399 | input_free_device(hp_wmi_input_dev); | |
400 | return err; | |
401 | } | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static void cleanup_sysfs(struct platform_device *device) | |
407 | { | |
408 | device_remove_file(&device->dev, &dev_attr_display); | |
409 | device_remove_file(&device->dev, &dev_attr_hddtemp); | |
410 | device_remove_file(&device->dev, &dev_attr_als); | |
411 | device_remove_file(&device->dev, &dev_attr_dock); | |
412 | } | |
413 | ||
414 | static int __init hp_wmi_bios_setup(struct platform_device *device) | |
415 | { | |
416 | int err; | |
3f6e2f13 | 417 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
62ec30d4 MG |
418 | |
419 | err = device_create_file(&device->dev, &dev_attr_display); | |
420 | if (err) | |
421 | goto add_sysfs_error; | |
422 | err = device_create_file(&device->dev, &dev_attr_hddtemp); | |
423 | if (err) | |
424 | goto add_sysfs_error; | |
425 | err = device_create_file(&device->dev, &dev_attr_als); | |
426 | if (err) | |
427 | goto add_sysfs_error; | |
428 | err = device_create_file(&device->dev, &dev_attr_dock); | |
429 | if (err) | |
430 | goto add_sysfs_error; | |
431 | ||
3f6e2f13 MG |
432 | if (wireless & 0x1) { |
433 | wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN); | |
434 | wifi_rfkill->name = "hp-wifi"; | |
435 | wifi_rfkill->state = hp_wmi_wifi_state(); | |
436 | wifi_rfkill->toggle_radio = hp_wmi_wifi_set; | |
437 | wifi_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 LF |
438 | err = rfkill_register(wifi_rfkill); |
439 | if (err) | |
440 | goto add_sysfs_error; | |
3f6e2f13 MG |
441 | } |
442 | ||
443 | if (wireless & 0x2) { | |
444 | bluetooth_rfkill = rfkill_allocate(&device->dev, | |
445 | RFKILL_TYPE_BLUETOOTH); | |
446 | bluetooth_rfkill->name = "hp-bluetooth"; | |
447 | bluetooth_rfkill->state = hp_wmi_bluetooth_state(); | |
448 | bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set; | |
449 | bluetooth_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 | 450 | err = rfkill_register(bluetooth_rfkill); |
6989d565 | 451 | if (err) |
fe8e4e03 | 452 | goto register_bluetooth_error; |
3f6e2f13 MG |
453 | } |
454 | ||
455 | if (wireless & 0x4) { | |
456 | wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN); | |
457 | wwan_rfkill->name = "hp-wwan"; | |
458 | wwan_rfkill->state = hp_wmi_wwan_state(); | |
459 | wwan_rfkill->toggle_radio = hp_wmi_wwan_set; | |
460 | wwan_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 LF |
461 | err = rfkill_register(wwan_rfkill); |
462 | if (err) | |
463 | goto register_wwan_err; | |
3f6e2f13 | 464 | } |
62ec30d4 MG |
465 | |
466 | return 0; | |
fe8e4e03 | 467 | register_wwan_err: |
44f0606d AM |
468 | if (bluetooth_rfkill) |
469 | rfkill_unregister(bluetooth_rfkill); | |
fe8e4e03 | 470 | register_bluetooth_error: |
44f0606d AM |
471 | if (wifi_rfkill) |
472 | rfkill_unregister(wifi_rfkill); | |
62ec30d4 MG |
473 | add_sysfs_error: |
474 | cleanup_sysfs(device); | |
475 | return err; | |
476 | } | |
477 | ||
478 | static int __exit hp_wmi_bios_remove(struct platform_device *device) | |
479 | { | |
480 | cleanup_sysfs(device); | |
481 | ||
3f6e2f13 MG |
482 | if (wifi_rfkill) |
483 | rfkill_unregister(wifi_rfkill); | |
484 | if (bluetooth_rfkill) | |
485 | rfkill_unregister(bluetooth_rfkill); | |
486 | if (wwan_rfkill) | |
487 | rfkill_unregister(wwan_rfkill); | |
62ec30d4 MG |
488 | |
489 | return 0; | |
490 | } | |
491 | ||
4c395bdd FP |
492 | static int hp_wmi_resume_handler(struct platform_device *device) |
493 | { | |
494 | struct key_entry *key; | |
495 | ||
496 | /* | |
497 | * Docking state may have changed while suspended, so trigger | |
498 | * an input event for the current state. As this is a switch, | |
499 | * the input layer will only actually pass it on if the state | |
500 | * changed. | |
501 | */ | |
502 | for (key = hp_wmi_keymap; key->type != KE_END; key++) { | |
503 | switch (key->type) { | |
504 | case KE_SW: | |
505 | input_report_switch(hp_wmi_input_dev, key->keycode, | |
506 | hp_wmi_dock_state()); | |
507 | input_sync(hp_wmi_input_dev); | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
62ec30d4 MG |
515 | static int __init hp_wmi_init(void) |
516 | { | |
517 | int err; | |
518 | ||
519 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
520 | err = wmi_install_notify_handler(HPWMI_EVENT_GUID, | |
521 | hp_wmi_notify, NULL); | |
522 | if (!err) | |
523 | hp_wmi_input_setup(); | |
524 | } | |
525 | ||
526 | if (wmi_has_guid(HPWMI_BIOS_GUID)) { | |
527 | err = platform_driver_register(&hp_wmi_driver); | |
528 | if (err) | |
529 | return 0; | |
530 | hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); | |
531 | if (!hp_wmi_platform_dev) { | |
532 | platform_driver_unregister(&hp_wmi_driver); | |
533 | return 0; | |
534 | } | |
535 | platform_device_add(hp_wmi_platform_dev); | |
536 | } | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static void __exit hp_wmi_exit(void) | |
542 | { | |
543 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
544 | wmi_remove_notify_handler(HPWMI_EVENT_GUID); | |
545 | input_unregister_device(hp_wmi_input_dev); | |
546 | } | |
547 | if (hp_wmi_platform_dev) { | |
548 | platform_device_del(hp_wmi_platform_dev); | |
549 | platform_driver_unregister(&hp_wmi_driver); | |
550 | } | |
551 | } | |
552 | ||
553 | module_init(hp_wmi_init); | |
554 | module_exit(hp_wmi_exit); |