nvidiafb: fix boot-time printk string
[linux-2.6.git] / drivers / platform / x86 / hp-wmi.c
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
52 #define HPWMI_HOTKEY_QUERY 0xc
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);
56 static int hp_wmi_resume_handler(struct platform_device *device);
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 */
74         u16 code;
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},
84         {KE_KEY, 0x20e6, KEY_PROG1},
85         {KE_KEY, 0x2142, KEY_MEDIA},
86         {KE_KEY, 0x213b, KEY_INFO},
87         {KE_KEY, 0x231b, KEY_HELP},
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,
105         .resume = hp_wmi_resume_handler,
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_set_block(void *data, bool blocked)
158 {
159         unsigned long b = (unsigned long) data;
160         int query = BIT(b + 8) | ((!!blocked) << b);
161
162         return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
163 }
164
165 static const struct rfkill_ops hp_wmi_rfkill_ops = {
166         .set_block = hp_wmi_set_block,
167 };
168
169 static bool hp_wmi_wifi_state(void)
170 {
171         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
172
173         if (wireless & 0x100)
174                 return false;
175         else
176                 return true;
177 }
178
179 static bool hp_wmi_bluetooth_state(void)
180 {
181         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
182
183         if (wireless & 0x10000)
184                 return false;
185         else
186                 return true;
187 }
188
189 static bool hp_wmi_wwan_state(void)
190 {
191         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
192
193         if (wireless & 0x1000000)
194                 return false;
195         else
196                 return true;
197 }
198
199 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
200                             char *buf)
201 {
202         int value = hp_wmi_display_state();
203         if (value < 0)
204                 return -EINVAL;
205         return sprintf(buf, "%d\n", value);
206 }
207
208 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
209                             char *buf)
210 {
211         int value = hp_wmi_hddtemp_state();
212         if (value < 0)
213                 return -EINVAL;
214         return sprintf(buf, "%d\n", value);
215 }
216
217 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
218                         char *buf)
219 {
220         int value = hp_wmi_als_state();
221         if (value < 0)
222                 return -EINVAL;
223         return sprintf(buf, "%d\n", value);
224 }
225
226 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
227                          char *buf)
228 {
229         int value = hp_wmi_dock_state();
230         if (value < 0)
231                 return -EINVAL;
232         return sprintf(buf, "%d\n", value);
233 }
234
235 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
236                        const char *buf, size_t count)
237 {
238         u32 tmp = simple_strtoul(buf, NULL, 10);
239         hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
240         return count;
241 }
242
243 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
244 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
245 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
246 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
247
248 static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
249 {
250         struct key_entry *key;
251
252         for (key = hp_wmi_keymap; key->type != KE_END; key++)
253                 if (code == key->code)
254                         return key;
255
256         return NULL;
257 }
258
259 static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
260 {
261         struct key_entry *key;
262
263         for (key = hp_wmi_keymap; key->type != KE_END; key++)
264                 if (key->type == KE_KEY && keycode == key->keycode)
265                         return key;
266
267         return NULL;
268 }
269
270 static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
271 {
272         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
273
274         if (key && key->type == KE_KEY) {
275                 *keycode = key->keycode;
276                 return 0;
277         }
278
279         return -EINVAL;
280 }
281
282 static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
283 {
284         struct key_entry *key;
285         int old_keycode;
286
287         if (keycode < 0 || keycode > KEY_MAX)
288                 return -EINVAL;
289
290         key = hp_wmi_get_entry_by_scancode(scancode);
291         if (key && key->type == KE_KEY) {
292                 old_keycode = key->keycode;
293                 key->keycode = keycode;
294                 set_bit(keycode, dev->keybit);
295                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
296                         clear_bit(old_keycode, dev->keybit);
297                 return 0;
298         }
299
300         return -EINVAL;
301 }
302
303 static void hp_wmi_notify(u32 value, void *context)
304 {
305         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
306         static struct key_entry *key;
307         union acpi_object *obj;
308
309         wmi_get_event_data(value, &response);
310
311         obj = (union acpi_object *)response.pointer;
312
313         if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
314                 int eventcode = *((u8 *) obj->buffer.pointer);
315                 if (eventcode == 0x4)
316                         eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
317                                                          0);
318                 key = hp_wmi_get_entry_by_scancode(eventcode);
319                 if (key) {
320                         switch (key->type) {
321                         case KE_KEY:
322                                 input_report_key(hp_wmi_input_dev,
323                                                  key->keycode, 1);
324                                 input_sync(hp_wmi_input_dev);
325                                 input_report_key(hp_wmi_input_dev,
326                                                  key->keycode, 0);
327                                 input_sync(hp_wmi_input_dev);
328                                 break;
329                         case KE_SW:
330                                 input_report_switch(hp_wmi_input_dev,
331                                                     key->keycode,
332                                                     hp_wmi_dock_state());
333                                 input_sync(hp_wmi_input_dev);
334                                 break;
335                         }
336                 } else if (eventcode == 0x5) {
337                         if (wifi_rfkill)
338                                 rfkill_set_sw_state(wifi_rfkill,
339                                                     hp_wmi_wifi_state());
340                         if (bluetooth_rfkill)
341                                 rfkill_set_sw_state(bluetooth_rfkill,
342                                                     hp_wmi_bluetooth_state());
343                         if (wwan_rfkill)
344                                 rfkill_set_sw_state(wwan_rfkill,
345                                                     hp_wmi_wwan_state());
346                 } else
347                         printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
348                                eventcode);
349         } else
350                 printk(KERN_INFO "HP WMI: Unknown response received\n");
351 }
352
353 static int __init hp_wmi_input_setup(void)
354 {
355         struct key_entry *key;
356         int err;
357
358         hp_wmi_input_dev = input_allocate_device();
359
360         hp_wmi_input_dev->name = "HP WMI hotkeys";
361         hp_wmi_input_dev->phys = "wmi/input0";
362         hp_wmi_input_dev->id.bustype = BUS_HOST;
363         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
364         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
365
366         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
367                 switch (key->type) {
368                 case KE_KEY:
369                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
370                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
371                         break;
372                 case KE_SW:
373                         set_bit(EV_SW, hp_wmi_input_dev->evbit);
374                         set_bit(key->keycode, hp_wmi_input_dev->swbit);
375
376                         /* Set initial dock state */
377                         input_report_switch(hp_wmi_input_dev, key->keycode,
378                                             hp_wmi_dock_state());
379                         input_sync(hp_wmi_input_dev);
380                         break;
381                 }
382         }
383
384         err = input_register_device(hp_wmi_input_dev);
385
386         if (err) {
387                 input_free_device(hp_wmi_input_dev);
388                 return err;
389         }
390
391         return 0;
392 }
393
394 static void cleanup_sysfs(struct platform_device *device)
395 {
396         device_remove_file(&device->dev, &dev_attr_display);
397         device_remove_file(&device->dev, &dev_attr_hddtemp);
398         device_remove_file(&device->dev, &dev_attr_als);
399         device_remove_file(&device->dev, &dev_attr_dock);
400 }
401
402 static int __init hp_wmi_bios_setup(struct platform_device *device)
403 {
404         int err;
405         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
406
407         err = device_create_file(&device->dev, &dev_attr_display);
408         if (err)
409                 goto add_sysfs_error;
410         err = device_create_file(&device->dev, &dev_attr_hddtemp);
411         if (err)
412                 goto add_sysfs_error;
413         err = device_create_file(&device->dev, &dev_attr_als);
414         if (err)
415                 goto add_sysfs_error;
416         err = device_create_file(&device->dev, &dev_attr_dock);
417         if (err)
418                 goto add_sysfs_error;
419
420         if (wireless & 0x1) {
421                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
422                                            RFKILL_TYPE_WLAN,
423                                            &hp_wmi_rfkill_ops,
424                                            (void *) 0);
425                 err = rfkill_register(wifi_rfkill);
426                 if (err)
427                         goto register_wifi_error;
428         }
429
430         if (wireless & 0x2) {
431                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
432                                                 RFKILL_TYPE_BLUETOOTH,
433                                                 &hp_wmi_rfkill_ops,
434                                                 (void *) 1);
435                 err = rfkill_register(bluetooth_rfkill);
436                 if (err)
437                         goto register_bluetooth_error;
438         }
439
440         if (wireless & 0x4) {
441                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
442                                            RFKILL_TYPE_WWAN,
443                                            &hp_wmi_rfkill_ops,
444                                            (void *) 2);
445                 err = rfkill_register(wwan_rfkill);
446                 if (err)
447                         goto register_wwan_err;
448         }
449
450         return 0;
451 register_wwan_err:
452         rfkill_destroy(wwan_rfkill);
453         if (bluetooth_rfkill)
454                 rfkill_unregister(bluetooth_rfkill);
455 register_bluetooth_error:
456         rfkill_destroy(bluetooth_rfkill);
457         if (wifi_rfkill)
458                 rfkill_unregister(wifi_rfkill);
459 register_wifi_error:
460         rfkill_destroy(wifi_rfkill);
461 add_sysfs_error:
462         cleanup_sysfs(device);
463         return err;
464 }
465
466 static int __exit hp_wmi_bios_remove(struct platform_device *device)
467 {
468         cleanup_sysfs(device);
469
470         if (wifi_rfkill) {
471                 rfkill_unregister(wifi_rfkill);
472                 rfkill_destroy(wifi_rfkill);
473         }
474         if (bluetooth_rfkill) {
475                 rfkill_unregister(bluetooth_rfkill);
476                 rfkill_destroy(wifi_rfkill);
477         }
478         if (wwan_rfkill) {
479                 rfkill_unregister(wwan_rfkill);
480                 rfkill_destroy(wwan_rfkill);
481         }
482
483         return 0;
484 }
485
486 static int hp_wmi_resume_handler(struct platform_device *device)
487 {
488         struct key_entry *key;
489
490         /*
491          * Docking state may have changed while suspended, so trigger
492          * an input event for the current state. As this is a switch,
493          * the input layer will only actually pass it on if the state
494          * changed.
495          */
496         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
497                 switch (key->type) {
498                 case KE_SW:
499                         input_report_switch(hp_wmi_input_dev, key->keycode,
500                                             hp_wmi_dock_state());
501                         input_sync(hp_wmi_input_dev);
502                         break;
503                 }
504         }
505
506         return 0;
507 }
508
509 static int __init hp_wmi_init(void)
510 {
511         int err;
512
513         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
514                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
515                                                  hp_wmi_notify, NULL);
516                 if (!err)
517                         hp_wmi_input_setup();
518         }
519
520         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
521                 err = platform_driver_register(&hp_wmi_driver);
522                 if (err)
523                         return 0;
524                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
525                 if (!hp_wmi_platform_dev) {
526                         platform_driver_unregister(&hp_wmi_driver);
527                         return 0;
528                 }
529                 platform_device_add(hp_wmi_platform_dev);
530         }
531
532         return 0;
533 }
534
535 static void __exit hp_wmi_exit(void)
536 {
537         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
538                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
539                 input_unregister_device(hp_wmi_input_dev);
540         }
541         if (hp_wmi_platform_dev) {
542                 platform_device_del(hp_wmi_platform_dev);
543                 platform_driver_unregister(&hp_wmi_driver);
544         }
545 }
546
547 module_init(hp_wmi_init);
548 module_exit(hp_wmi_exit);