rfkill: remove user_claim stuff
[linux-2.6.git] / drivers / platform / x86 / acer-wmi.c
1 /*
2  *  Acer WMI Laptop Extras
3  *
4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
5  *
6  *  Based on acer_acpi:
7  *    Copyright (C) 2005-2007   E.M. Smith
8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; either version 2 of the License, or
13  *  (at your option) any later version.
14  *
15  *  This program is distributed in the hope that it will be useful,
16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *  GNU General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License
21  *  along with this program; if not, write to the Free Software
22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23  */
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/dmi.h>
30 #include <linux/fb.h>
31 #include <linux/backlight.h>
32 #include <linux/leds.h>
33 #include <linux/platform_device.h>
34 #include <linux/acpi.h>
35 #include <linux/i8042.h>
36 #include <linux/rfkill.h>
37 #include <linux/workqueue.h>
38 #include <linux/debugfs.h>
39
40 #include <acpi/acpi_drivers.h>
41
42 MODULE_AUTHOR("Carlos Corbacho");
43 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
44 MODULE_LICENSE("GPL");
45
46 #define ACER_LOGPREFIX "acer-wmi: "
47 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
48 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
49 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
50
51 /*
52  * The following defines quirks to get some specific functions to work
53  * which are known to not be supported over ACPI-WMI (such as the mail LED
54  * on WMID based Acer's)
55  */
56 struct acer_quirks {
57         const char *vendor;
58         const char *model;
59         u16 quirks;
60 };
61
62 /*
63  * Magic Number
64  * Meaning is unknown - this number is required for writing to ACPI for AMW0
65  * (it's also used in acerhk when directly accessing the BIOS)
66  */
67 #define ACER_AMW0_WRITE 0x9610
68
69 /*
70  * Bit masks for the AMW0 interface
71  */
72 #define ACER_AMW0_WIRELESS_MASK  0x35
73 #define ACER_AMW0_BLUETOOTH_MASK 0x34
74 #define ACER_AMW0_MAILLED_MASK   0x31
75
76 /*
77  * Method IDs for WMID interface
78  */
79 #define ACER_WMID_GET_WIRELESS_METHODID         1
80 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
81 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
82 #define ACER_WMID_SET_WIRELESS_METHODID         4
83 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
84 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
85 #define ACER_WMID_GET_THREEG_METHODID           10
86 #define ACER_WMID_SET_THREEG_METHODID           11
87
88 /*
89  * Acer ACPI method GUIDs
90  */
91 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
92 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
93 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
94 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
95
96 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
97 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
98
99 /* Temporary workaround until the WMI sysfs interface goes in */
100 MODULE_ALIAS("dmi:*:*Acer*:*:");
101
102 /*
103  * Interface capability flags
104  */
105 #define ACER_CAP_MAILLED                (1<<0)
106 #define ACER_CAP_WIRELESS               (1<<1)
107 #define ACER_CAP_BLUETOOTH              (1<<2)
108 #define ACER_CAP_BRIGHTNESS             (1<<3)
109 #define ACER_CAP_THREEG                 (1<<4)
110 #define ACER_CAP_ANY                    (0xFFFFFFFF)
111
112 /*
113  * Interface type flags
114  */
115 enum interface_flags {
116         ACER_AMW0,
117         ACER_AMW0_V2,
118         ACER_WMID,
119 };
120
121 #define ACER_DEFAULT_WIRELESS  0
122 #define ACER_DEFAULT_BLUETOOTH 0
123 #define ACER_DEFAULT_MAILLED   0
124 #define ACER_DEFAULT_THREEG    0
125
126 static int max_brightness = 0xF;
127
128 static int mailled = -1;
129 static int brightness = -1;
130 static int threeg = -1;
131 static int force_series;
132
133 module_param(mailled, int, 0444);
134 module_param(brightness, int, 0444);
135 module_param(threeg, int, 0444);
136 module_param(force_series, int, 0444);
137 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
138 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
139 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
140 MODULE_PARM_DESC(force_series, "Force a different laptop series");
141
142 struct acer_data {
143         int mailled;
144         int threeg;
145         int brightness;
146 };
147
148 struct acer_debug {
149         struct dentry *root;
150         struct dentry *devices;
151         u32 wmid_devices;
152 };
153
154 static struct rfkill *wireless_rfkill;
155 static struct rfkill *bluetooth_rfkill;
156
157 /* Each low-level interface must define at least some of the following */
158 struct wmi_interface {
159         /* The WMI device type */
160         u32 type;
161
162         /* The capabilities this interface provides */
163         u32 capability;
164
165         /* Private data for the current interface */
166         struct acer_data data;
167
168         /* debugfs entries associated with this interface */
169         struct acer_debug debug;
170 };
171
172 /* The static interface pointer, points to the currently detected interface */
173 static struct wmi_interface *interface;
174
175 /*
176  * Embedded Controller quirks
177  * Some laptops require us to directly access the EC to either enable or query
178  * features that are not available through WMI.
179  */
180
181 struct quirk_entry {
182         u8 wireless;
183         u8 mailled;
184         s8 brightness;
185         u8 bluetooth;
186 };
187
188 static struct quirk_entry *quirks;
189
190 static void set_quirks(void)
191 {
192         if (!interface)
193                 return;
194
195         if (quirks->mailled)
196                 interface->capability |= ACER_CAP_MAILLED;
197
198         if (quirks->brightness)
199                 interface->capability |= ACER_CAP_BRIGHTNESS;
200 }
201
202 static int dmi_matched(const struct dmi_system_id *dmi)
203 {
204         quirks = dmi->driver_data;
205         return 0;
206 }
207
208 static struct quirk_entry quirk_unknown = {
209 };
210
211 static struct quirk_entry quirk_acer_aspire_1520 = {
212         .brightness = -1,
213 };
214
215 static struct quirk_entry quirk_acer_travelmate_2490 = {
216         .mailled = 1,
217 };
218
219 /* This AMW0 laptop has no bluetooth */
220 static struct quirk_entry quirk_medion_md_98300 = {
221         .wireless = 1,
222 };
223
224 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
225         .wireless = 2,
226 };
227
228 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
229 static struct dmi_system_id __devinitdata acer_blacklist[] = {
230         {
231                 .ident = "Acer Aspire One (SSD)",
232                 .matches = {
233                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
234                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
235                 },
236         },
237         {
238                 .ident = "Acer Aspire One (HDD)",
239                 .matches = {
240                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
241                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
242                 },
243         },
244         {}
245 };
246
247 static struct dmi_system_id acer_quirks[] = {
248         {
249                 .callback = dmi_matched,
250                 .ident = "Acer Aspire 1360",
251                 .matches = {
252                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
253                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
254                 },
255                 .driver_data = &quirk_acer_aspire_1520,
256         },
257         {
258                 .callback = dmi_matched,
259                 .ident = "Acer Aspire 1520",
260                 .matches = {
261                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
262                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
263                 },
264                 .driver_data = &quirk_acer_aspire_1520,
265         },
266         {
267                 .callback = dmi_matched,
268                 .ident = "Acer Aspire 3100",
269                 .matches = {
270                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
271                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
272                 },
273                 .driver_data = &quirk_acer_travelmate_2490,
274         },
275         {
276                 .callback = dmi_matched,
277                 .ident = "Acer Aspire 3610",
278                 .matches = {
279                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
280                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
281                 },
282                 .driver_data = &quirk_acer_travelmate_2490,
283         },
284         {
285                 .callback = dmi_matched,
286                 .ident = "Acer Aspire 5100",
287                 .matches = {
288                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
289                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
290                 },
291                 .driver_data = &quirk_acer_travelmate_2490,
292         },
293         {
294                 .callback = dmi_matched,
295                 .ident = "Acer Aspire 5610",
296                 .matches = {
297                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
298                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
299                 },
300                 .driver_data = &quirk_acer_travelmate_2490,
301         },
302         {
303                 .callback = dmi_matched,
304                 .ident = "Acer Aspire 5630",
305                 .matches = {
306                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
307                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
308                 },
309                 .driver_data = &quirk_acer_travelmate_2490,
310         },
311         {
312                 .callback = dmi_matched,
313                 .ident = "Acer Aspire 5650",
314                 .matches = {
315                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
316                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
317                 },
318                 .driver_data = &quirk_acer_travelmate_2490,
319         },
320         {
321                 .callback = dmi_matched,
322                 .ident = "Acer Aspire 5680",
323                 .matches = {
324                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
325                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
326                 },
327                 .driver_data = &quirk_acer_travelmate_2490,
328         },
329         {
330                 .callback = dmi_matched,
331                 .ident = "Acer Aspire 9110",
332                 .matches = {
333                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
334                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
335                 },
336                 .driver_data = &quirk_acer_travelmate_2490,
337         },
338         {
339                 .callback = dmi_matched,
340                 .ident = "Acer TravelMate 2490",
341                 .matches = {
342                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
343                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
344                 },
345                 .driver_data = &quirk_acer_travelmate_2490,
346         },
347         {
348                 .callback = dmi_matched,
349                 .ident = "Acer TravelMate 4200",
350                 .matches = {
351                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
352                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
353                 },
354                 .driver_data = &quirk_acer_travelmate_2490,
355         },
356         {
357                 .callback = dmi_matched,
358                 .ident = "Fujitsu Siemens Amilo Li 1718",
359                 .matches = {
360                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
361                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
362                 },
363                 .driver_data = &quirk_fujitsu_amilo_li_1718,
364         },
365         {
366                 .callback = dmi_matched,
367                 .ident = "Medion MD 98300",
368                 .matches = {
369                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
370                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
371                 },
372                 .driver_data = &quirk_medion_md_98300,
373         },
374         {}
375 };
376
377 /* Find which quirks are needed for a particular vendor/ model pair */
378 static void find_quirks(void)
379 {
380         if (!force_series) {
381                 dmi_check_system(acer_quirks);
382         } else if (force_series == 2490) {
383                 quirks = &quirk_acer_travelmate_2490;
384         }
385
386         if (quirks == NULL)
387                 quirks = &quirk_unknown;
388
389         set_quirks();
390 }
391
392 /*
393  * General interface convenience methods
394  */
395
396 static bool has_cap(u32 cap)
397 {
398         if ((interface->capability & cap) != 0)
399                 return 1;
400
401         return 0;
402 }
403
404 /*
405  * AMW0 (V1) interface
406  */
407 struct wmab_args {
408         u32 eax;
409         u32 ebx;
410         u32 ecx;
411         u32 edx;
412 };
413
414 struct wmab_ret {
415         u32 eax;
416         u32 ebx;
417         u32 ecx;
418         u32 edx;
419         u32 eex;
420 };
421
422 static acpi_status wmab_execute(struct wmab_args *regbuf,
423 struct acpi_buffer *result)
424 {
425         struct acpi_buffer input;
426         acpi_status status;
427         input.length = sizeof(struct wmab_args);
428         input.pointer = (u8 *)regbuf;
429
430         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
431
432         return status;
433 }
434
435 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
436 struct wmi_interface *iface)
437 {
438         int err;
439         u8 result;
440
441         switch (cap) {
442         case ACER_CAP_MAILLED:
443                 switch (quirks->mailled) {
444                 default:
445                         err = ec_read(0xA, &result);
446                         if (err)
447                                 return AE_ERROR;
448                         *value = (result >> 7) & 0x1;
449                         return AE_OK;
450                 }
451                 break;
452         case ACER_CAP_WIRELESS:
453                 switch (quirks->wireless) {
454                 case 1:
455                         err = ec_read(0x7B, &result);
456                         if (err)
457                                 return AE_ERROR;
458                         *value = result & 0x1;
459                         return AE_OK;
460                 case 2:
461                         err = ec_read(0x71, &result);
462                         if (err)
463                                 return AE_ERROR;
464                         *value = result & 0x1;
465                         return AE_OK;
466                 default:
467                         err = ec_read(0xA, &result);
468                         if (err)
469                                 return AE_ERROR;
470                         *value = (result >> 2) & 0x1;
471                         return AE_OK;
472                 }
473                 break;
474         case ACER_CAP_BLUETOOTH:
475                 switch (quirks->bluetooth) {
476                 default:
477                         err = ec_read(0xA, &result);
478                         if (err)
479                                 return AE_ERROR;
480                         *value = (result >> 4) & 0x1;
481                         return AE_OK;
482                 }
483                 break;
484         case ACER_CAP_BRIGHTNESS:
485                 switch (quirks->brightness) {
486                 default:
487                         err = ec_read(0x83, &result);
488                         if (err)
489                                 return AE_ERROR;
490                         *value = result;
491                         return AE_OK;
492                 }
493                 break;
494         default:
495                 return AE_ERROR;
496         }
497         return AE_OK;
498 }
499
500 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
501 {
502         struct wmab_args args;
503
504         args.eax = ACER_AMW0_WRITE;
505         args.ebx = value ? (1<<8) : 0;
506         args.ecx = args.edx = 0;
507
508         switch (cap) {
509         case ACER_CAP_MAILLED:
510                 if (value > 1)
511                         return AE_BAD_PARAMETER;
512                 args.ebx |= ACER_AMW0_MAILLED_MASK;
513                 break;
514         case ACER_CAP_WIRELESS:
515                 if (value > 1)
516                         return AE_BAD_PARAMETER;
517                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
518                 break;
519         case ACER_CAP_BLUETOOTH:
520                 if (value > 1)
521                         return AE_BAD_PARAMETER;
522                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
523                 break;
524         case ACER_CAP_BRIGHTNESS:
525                 if (value > max_brightness)
526                         return AE_BAD_PARAMETER;
527                 switch (quirks->brightness) {
528                 default:
529                         return ec_write(0x83, value);
530                         break;
531                 }
532         default:
533                 return AE_ERROR;
534         }
535
536         /* Actually do the set */
537         return wmab_execute(&args, NULL);
538 }
539
540 static acpi_status AMW0_find_mailled(void)
541 {
542         struct wmab_args args;
543         struct wmab_ret ret;
544         acpi_status status = AE_OK;
545         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
546         union acpi_object *obj;
547
548         args.eax = 0x86;
549         args.ebx = args.ecx = args.edx = 0;
550
551         status = wmab_execute(&args, &out);
552         if (ACPI_FAILURE(status))
553                 return status;
554
555         obj = (union acpi_object *) out.pointer;
556         if (obj && obj->type == ACPI_TYPE_BUFFER &&
557         obj->buffer.length == sizeof(struct wmab_ret)) {
558                 ret = *((struct wmab_ret *) obj->buffer.pointer);
559         } else {
560                 return AE_ERROR;
561         }
562
563         if (ret.eex & 0x1)
564                 interface->capability |= ACER_CAP_MAILLED;
565
566         kfree(out.pointer);
567
568         return AE_OK;
569 }
570
571 static acpi_status AMW0_set_capabilities(void)
572 {
573         struct wmab_args args;
574         struct wmab_ret ret;
575         acpi_status status = AE_OK;
576         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
577         union acpi_object *obj;
578
579         /*
580          * On laptops with this strange GUID (non Acer), normal probing doesn't
581          * work.
582          */
583         if (wmi_has_guid(AMW0_GUID2)) {
584                 interface->capability |= ACER_CAP_WIRELESS;
585                 return AE_OK;
586         }
587
588         args.eax = ACER_AMW0_WRITE;
589         args.ecx = args.edx = 0;
590
591         args.ebx = 0xa2 << 8;
592         args.ebx |= ACER_AMW0_WIRELESS_MASK;
593
594         status = wmab_execute(&args, &out);
595         if (ACPI_FAILURE(status))
596                 return status;
597
598         obj = (union acpi_object *) out.pointer;
599         if (obj && obj->type == ACPI_TYPE_BUFFER &&
600         obj->buffer.length == sizeof(struct wmab_ret)) {
601                 ret = *((struct wmab_ret *) obj->buffer.pointer);
602         } else {
603                 return AE_ERROR;
604         }
605
606         if (ret.eax & 0x1)
607                 interface->capability |= ACER_CAP_WIRELESS;
608
609         args.ebx = 2 << 8;
610         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
611
612         status = wmab_execute(&args, &out);
613         if (ACPI_FAILURE(status))
614                 return status;
615
616         obj = (union acpi_object *) out.pointer;
617         if (obj && obj->type == ACPI_TYPE_BUFFER
618         && obj->buffer.length == sizeof(struct wmab_ret)) {
619                 ret = *((struct wmab_ret *) obj->buffer.pointer);
620         } else {
621                 return AE_ERROR;
622         }
623
624         if (ret.eax & 0x1)
625                 interface->capability |= ACER_CAP_BLUETOOTH;
626
627         kfree(out.pointer);
628
629         /*
630          * This appears to be safe to enable, since all Wistron based laptops
631          * appear to use the same EC register for brightness, even if they
632          * differ for wireless, etc
633          */
634         if (quirks->brightness >= 0)
635                 interface->capability |= ACER_CAP_BRIGHTNESS;
636
637         return AE_OK;
638 }
639
640 static struct wmi_interface AMW0_interface = {
641         .type = ACER_AMW0,
642 };
643
644 static struct wmi_interface AMW0_V2_interface = {
645         .type = ACER_AMW0_V2,
646 };
647
648 /*
649  * New interface (The WMID interface)
650  */
651 static acpi_status
652 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
653 {
654         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
655         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
656         union acpi_object *obj;
657         u32 tmp;
658         acpi_status status;
659
660         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
661
662         if (ACPI_FAILURE(status))
663                 return status;
664
665         obj = (union acpi_object *) result.pointer;
666         if (obj && obj->type == ACPI_TYPE_BUFFER &&
667                 obj->buffer.length == sizeof(u32)) {
668                 tmp = *((u32 *) obj->buffer.pointer);
669         } else {
670                 tmp = 0;
671         }
672
673         if (out)
674                 *out = tmp;
675
676         kfree(result.pointer);
677
678         return status;
679 }
680
681 static acpi_status WMID_get_u32(u32 *value, u32 cap,
682 struct wmi_interface *iface)
683 {
684         acpi_status status;
685         u8 tmp;
686         u32 result, method_id = 0;
687
688         switch (cap) {
689         case ACER_CAP_WIRELESS:
690                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
691                 break;
692         case ACER_CAP_BLUETOOTH:
693                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
694                 break;
695         case ACER_CAP_BRIGHTNESS:
696                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
697                 break;
698         case ACER_CAP_THREEG:
699                 method_id = ACER_WMID_GET_THREEG_METHODID;
700                 break;
701         case ACER_CAP_MAILLED:
702                 if (quirks->mailled == 1) {
703                         ec_read(0x9f, &tmp);
704                         *value = tmp & 0x1;
705                         return 0;
706                 }
707         default:
708                 return AE_ERROR;
709         }
710         status = WMI_execute_u32(method_id, 0, &result);
711
712         if (ACPI_SUCCESS(status))
713                 *value = (u8)result;
714
715         return status;
716 }
717
718 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
719 {
720         u32 method_id = 0;
721         char param;
722
723         switch (cap) {
724         case ACER_CAP_BRIGHTNESS:
725                 if (value > max_brightness)
726                         return AE_BAD_PARAMETER;
727                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
728                 break;
729         case ACER_CAP_WIRELESS:
730                 if (value > 1)
731                         return AE_BAD_PARAMETER;
732                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
733                 break;
734         case ACER_CAP_BLUETOOTH:
735                 if (value > 1)
736                         return AE_BAD_PARAMETER;
737                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
738                 break;
739         case ACER_CAP_THREEG:
740                 if (value > 1)
741                         return AE_BAD_PARAMETER;
742                 method_id = ACER_WMID_SET_THREEG_METHODID;
743                 break;
744         case ACER_CAP_MAILLED:
745                 if (value > 1)
746                         return AE_BAD_PARAMETER;
747                 if (quirks->mailled == 1) {
748                         param = value ? 0x92 : 0x93;
749                         i8042_command(&param, 0x1059);
750                         return 0;
751                 }
752                 break;
753         default:
754                 return AE_ERROR;
755         }
756         return WMI_execute_u32(method_id, (u32)value, NULL);
757 }
758
759 static acpi_status WMID_set_capabilities(void)
760 {
761         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
762         union acpi_object *obj;
763         acpi_status status;
764         u32 devices;
765
766         status = wmi_query_block(WMID_GUID2, 1, &out);
767         if (ACPI_FAILURE(status))
768                 return status;
769
770         obj = (union acpi_object *) out.pointer;
771         if (obj && obj->type == ACPI_TYPE_BUFFER &&
772                 obj->buffer.length == sizeof(u32)) {
773                 devices = *((u32 *) obj->buffer.pointer);
774         } else {
775                 return AE_ERROR;
776         }
777
778         /* Not sure on the meaning of the relevant bits yet to detect these */
779         interface->capability |= ACER_CAP_WIRELESS;
780         interface->capability |= ACER_CAP_THREEG;
781
782         /* WMID always provides brightness methods */
783         interface->capability |= ACER_CAP_BRIGHTNESS;
784
785         if (devices & 0x10)
786                 interface->capability |= ACER_CAP_BLUETOOTH;
787
788         if (!(devices & 0x20))
789                 max_brightness = 0x9;
790
791         return status;
792 }
793
794 static struct wmi_interface wmid_interface = {
795         .type = ACER_WMID,
796 };
797
798 /*
799  * Generic Device (interface-independent)
800  */
801
802 static acpi_status get_u32(u32 *value, u32 cap)
803 {
804         acpi_status status = AE_ERROR;
805
806         switch (interface->type) {
807         case ACER_AMW0:
808                 status = AMW0_get_u32(value, cap, interface);
809                 break;
810         case ACER_AMW0_V2:
811                 if (cap == ACER_CAP_MAILLED) {
812                         status = AMW0_get_u32(value, cap, interface);
813                         break;
814                 }
815         case ACER_WMID:
816                 status = WMID_get_u32(value, cap, interface);
817                 break;
818         }
819
820         return status;
821 }
822
823 static acpi_status set_u32(u32 value, u32 cap)
824 {
825         acpi_status status;
826
827         if (interface->capability & cap) {
828                 switch (interface->type) {
829                 case ACER_AMW0:
830                         return AMW0_set_u32(value, cap, interface);
831                 case ACER_AMW0_V2:
832                         if (cap == ACER_CAP_MAILLED)
833                                 return AMW0_set_u32(value, cap, interface);
834
835                         /*
836                          * On some models, some WMID methods don't toggle
837                          * properly. For those cases, we want to run the AMW0
838                          * method afterwards to be certain we've really toggled
839                          * the device state.
840                          */
841                         if (cap == ACER_CAP_WIRELESS ||
842                                 cap == ACER_CAP_BLUETOOTH) {
843                                 status = WMID_set_u32(value, cap, interface);
844                                 if (ACPI_FAILURE(status))
845                                         return status;
846
847                                 return AMW0_set_u32(value, cap, interface);
848                         }
849                 case ACER_WMID:
850                         return WMID_set_u32(value, cap, interface);
851                 default:
852                         return AE_BAD_PARAMETER;
853                 }
854         }
855         return AE_BAD_PARAMETER;
856 }
857
858 static void __init acer_commandline_init(void)
859 {
860         /*
861          * These will all fail silently if the value given is invalid, or the
862          * capability isn't available on the given interface
863          */
864         set_u32(mailled, ACER_CAP_MAILLED);
865         set_u32(threeg, ACER_CAP_THREEG);
866         set_u32(brightness, ACER_CAP_BRIGHTNESS);
867 }
868
869 /*
870  * LED device (Mail LED only, no other LEDs known yet)
871  */
872 static void mail_led_set(struct led_classdev *led_cdev,
873 enum led_brightness value)
874 {
875         set_u32(value, ACER_CAP_MAILLED);
876 }
877
878 static struct led_classdev mail_led = {
879         .name = "acer-wmi::mail",
880         .brightness_set = mail_led_set,
881 };
882
883 static int __devinit acer_led_init(struct device *dev)
884 {
885         return led_classdev_register(dev, &mail_led);
886 }
887
888 static void acer_led_exit(void)
889 {
890         led_classdev_unregister(&mail_led);
891 }
892
893 /*
894  * Backlight device
895  */
896 static struct backlight_device *acer_backlight_device;
897
898 static int read_brightness(struct backlight_device *bd)
899 {
900         u32 value;
901         get_u32(&value, ACER_CAP_BRIGHTNESS);
902         return value;
903 }
904
905 static int update_bl_status(struct backlight_device *bd)
906 {
907         int intensity = bd->props.brightness;
908
909         if (bd->props.power != FB_BLANK_UNBLANK)
910                 intensity = 0;
911         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
912                 intensity = 0;
913
914         set_u32(intensity, ACER_CAP_BRIGHTNESS);
915
916         return 0;
917 }
918
919 static struct backlight_ops acer_bl_ops = {
920         .get_brightness = read_brightness,
921         .update_status = update_bl_status,
922 };
923
924 static int __devinit acer_backlight_init(struct device *dev)
925 {
926         struct backlight_device *bd;
927
928         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
929         if (IS_ERR(bd)) {
930                 printk(ACER_ERR "Could not register Acer backlight device\n");
931                 acer_backlight_device = NULL;
932                 return PTR_ERR(bd);
933         }
934
935         acer_backlight_device = bd;
936
937         bd->props.power = FB_BLANK_UNBLANK;
938         bd->props.brightness = max_brightness;
939         bd->props.max_brightness = max_brightness;
940         backlight_update_status(bd);
941         return 0;
942 }
943
944 static void acer_backlight_exit(void)
945 {
946         backlight_device_unregister(acer_backlight_device);
947 }
948
949 /*
950  * Rfkill devices
951  */
952 static void acer_rfkill_update(struct work_struct *ignored);
953 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
954 static void acer_rfkill_update(struct work_struct *ignored)
955 {
956         u32 state;
957         acpi_status status;
958
959         status = get_u32(&state, ACER_CAP_WIRELESS);
960         if (ACPI_SUCCESS(status))
961                 rfkill_force_state(wireless_rfkill, state ?
962                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED);
963
964         if (has_cap(ACER_CAP_BLUETOOTH)) {
965                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
966                 if (ACPI_SUCCESS(status))
967                         rfkill_force_state(bluetooth_rfkill, state ?
968                                 RFKILL_STATE_UNBLOCKED :
969                                 RFKILL_STATE_SOFT_BLOCKED);
970         }
971
972         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
973 }
974
975 static int acer_rfkill_set(void *data, enum rfkill_state state)
976 {
977         acpi_status status;
978         u32 *cap = data;
979         status = set_u32((u32) (state == RFKILL_STATE_UNBLOCKED), *cap);
980         if (ACPI_FAILURE(status))
981                 return -ENODEV;
982         return 0;
983 }
984
985 static struct rfkill * acer_rfkill_register(struct device *dev,
986 enum rfkill_type type, char *name, u32 cap)
987 {
988         int err;
989         u32 state;
990         u32 *data;
991         struct rfkill *rfkill_dev;
992
993         rfkill_dev = rfkill_allocate(dev, type);
994         if (!rfkill_dev)
995                 return ERR_PTR(-ENOMEM);
996         rfkill_dev->name = name;
997         get_u32(&state, cap);
998         rfkill_dev->state = state ? RFKILL_STATE_UNBLOCKED :
999                 RFKILL_STATE_SOFT_BLOCKED;
1000         data = kzalloc(sizeof(u32), GFP_KERNEL);
1001         if (!data) {
1002                 rfkill_free(rfkill_dev);
1003                 return ERR_PTR(-ENOMEM);
1004         }
1005         *data = cap;
1006         rfkill_dev->data = data;
1007         rfkill_dev->toggle_radio = acer_rfkill_set;
1008
1009         err = rfkill_register(rfkill_dev);
1010         if (err) {
1011                 kfree(rfkill_dev->data);
1012                 rfkill_free(rfkill_dev);
1013                 return ERR_PTR(err);
1014         }
1015         return rfkill_dev;
1016 }
1017
1018 static int acer_rfkill_init(struct device *dev)
1019 {
1020         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1021                 "acer-wireless", ACER_CAP_WIRELESS);
1022         if (IS_ERR(wireless_rfkill))
1023                 return PTR_ERR(wireless_rfkill);
1024
1025         if (has_cap(ACER_CAP_BLUETOOTH)) {
1026                 bluetooth_rfkill = acer_rfkill_register(dev,
1027                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1028                         ACER_CAP_BLUETOOTH);
1029                 if (IS_ERR(bluetooth_rfkill)) {
1030                         kfree(wireless_rfkill->data);
1031                         rfkill_unregister(wireless_rfkill);
1032                         return PTR_ERR(bluetooth_rfkill);
1033                 }
1034         }
1035
1036         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1037
1038         return 0;
1039 }
1040
1041 static void acer_rfkill_exit(void)
1042 {
1043         cancel_delayed_work_sync(&acer_rfkill_work);
1044         kfree(wireless_rfkill->data);
1045         rfkill_unregister(wireless_rfkill);
1046         if (has_cap(ACER_CAP_BLUETOOTH)) {
1047                 kfree(bluetooth_rfkill->data);
1048                 rfkill_unregister(bluetooth_rfkill);
1049         }
1050         return;
1051 }
1052
1053 /*
1054  * sysfs interface
1055  */
1056 static ssize_t show_bool_threeg(struct device *dev,
1057         struct device_attribute *attr, char *buf)
1058 {
1059         u32 result; \
1060         acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1061         if (ACPI_SUCCESS(status))
1062                 return sprintf(buf, "%u\n", result);
1063         return sprintf(buf, "Read error\n");
1064 }
1065
1066 static ssize_t set_bool_threeg(struct device *dev,
1067         struct device_attribute *attr, const char *buf, size_t count)
1068 {
1069         u32 tmp = simple_strtoul(buf, NULL, 10);
1070         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1071                 if (ACPI_FAILURE(status))
1072                         return -EINVAL;
1073         return count;
1074 }
1075 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1076         set_bool_threeg);
1077
1078 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1079         char *buf)
1080 {
1081         switch (interface->type) {
1082         case ACER_AMW0:
1083                 return sprintf(buf, "AMW0\n");
1084         case ACER_AMW0_V2:
1085                 return sprintf(buf, "AMW0 v2\n");
1086         case ACER_WMID:
1087                 return sprintf(buf, "WMID\n");
1088         default:
1089                 return sprintf(buf, "Error!\n");
1090         }
1091 }
1092
1093 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
1094         show_interface, NULL);
1095
1096 /*
1097  * debugfs functions
1098  */
1099 static u32 get_wmid_devices(void)
1100 {
1101         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1102         union acpi_object *obj;
1103         acpi_status status;
1104
1105         status = wmi_query_block(WMID_GUID2, 1, &out);
1106         if (ACPI_FAILURE(status))
1107                 return 0;
1108
1109         obj = (union acpi_object *) out.pointer;
1110         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1111                 obj->buffer.length == sizeof(u32)) {
1112                 return *((u32 *) obj->buffer.pointer);
1113         } else {
1114                 return 0;
1115         }
1116 }
1117
1118 /*
1119  * Platform device
1120  */
1121 static int __devinit acer_platform_probe(struct platform_device *device)
1122 {
1123         int err;
1124
1125         if (has_cap(ACER_CAP_MAILLED)) {
1126                 err = acer_led_init(&device->dev);
1127                 if (err)
1128                         goto error_mailled;
1129         }
1130
1131         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1132                 err = acer_backlight_init(&device->dev);
1133                 if (err)
1134                         goto error_brightness;
1135         }
1136
1137         err = acer_rfkill_init(&device->dev);
1138         if (err)
1139                 goto error_rfkill;
1140
1141         return err;
1142
1143 error_rfkill:
1144         if (has_cap(ACER_CAP_BRIGHTNESS))
1145                 acer_backlight_exit();
1146 error_brightness:
1147         if (has_cap(ACER_CAP_MAILLED))
1148                 acer_led_exit();
1149 error_mailled:
1150         return err;
1151 }
1152
1153 static int acer_platform_remove(struct platform_device *device)
1154 {
1155         if (has_cap(ACER_CAP_MAILLED))
1156                 acer_led_exit();
1157         if (has_cap(ACER_CAP_BRIGHTNESS))
1158                 acer_backlight_exit();
1159
1160         acer_rfkill_exit();
1161         return 0;
1162 }
1163
1164 static int acer_platform_suspend(struct platform_device *dev,
1165 pm_message_t state)
1166 {
1167         u32 value;
1168         struct acer_data *data = &interface->data;
1169
1170         if (!data)
1171                 return -ENOMEM;
1172
1173         if (has_cap(ACER_CAP_MAILLED)) {
1174                 get_u32(&value, ACER_CAP_MAILLED);
1175                 data->mailled = value;
1176         }
1177
1178         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1179                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1180                 data->brightness = value;
1181         }
1182
1183         return 0;
1184 }
1185
1186 static int acer_platform_resume(struct platform_device *device)
1187 {
1188         struct acer_data *data = &interface->data;
1189
1190         if (!data)
1191                 return -ENOMEM;
1192
1193         if (has_cap(ACER_CAP_MAILLED))
1194                 set_u32(data->mailled, ACER_CAP_MAILLED);
1195
1196         if (has_cap(ACER_CAP_BRIGHTNESS))
1197                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1198
1199         return 0;
1200 }
1201
1202 static struct platform_driver acer_platform_driver = {
1203         .driver = {
1204                 .name = "acer-wmi",
1205                 .owner = THIS_MODULE,
1206         },
1207         .probe = acer_platform_probe,
1208         .remove = acer_platform_remove,
1209         .suspend = acer_platform_suspend,
1210         .resume = acer_platform_resume,
1211 };
1212
1213 static struct platform_device *acer_platform_device;
1214
1215 static int remove_sysfs(struct platform_device *device)
1216 {
1217         if (has_cap(ACER_CAP_THREEG))
1218                 device_remove_file(&device->dev, &dev_attr_threeg);
1219
1220         device_remove_file(&device->dev, &dev_attr_interface);
1221
1222         return 0;
1223 }
1224
1225 static int create_sysfs(void)
1226 {
1227         int retval = -ENOMEM;
1228
1229         if (has_cap(ACER_CAP_THREEG)) {
1230                 retval = device_create_file(&acer_platform_device->dev,
1231                         &dev_attr_threeg);
1232                 if (retval)
1233                         goto error_sysfs;
1234         }
1235
1236         retval = device_create_file(&acer_platform_device->dev,
1237                 &dev_attr_interface);
1238         if (retval)
1239                 goto error_sysfs;
1240
1241         return 0;
1242
1243 error_sysfs:
1244                 remove_sysfs(acer_platform_device);
1245         return retval;
1246 }
1247
1248 static void remove_debugfs(void)
1249 {
1250         debugfs_remove(interface->debug.devices);
1251         debugfs_remove(interface->debug.root);
1252 }
1253
1254 static int create_debugfs(void)
1255 {
1256         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1257         if (!interface->debug.root) {
1258                 printk(ACER_ERR "Failed to create debugfs directory");
1259                 return -ENOMEM;
1260         }
1261
1262         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1263                                         interface->debug.root,
1264                                         &interface->debug.wmid_devices);
1265         if (!interface->debug.devices)
1266                 goto error_debugfs;
1267
1268         return 0;
1269
1270 error_debugfs:
1271         remove_debugfs();
1272         return -ENOMEM;
1273 }
1274
1275 static int __init acer_wmi_init(void)
1276 {
1277         int err;
1278
1279         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1280
1281         if (dmi_check_system(acer_blacklist)) {
1282                 printk(ACER_INFO "Blacklisted hardware detected - "
1283                                 "not loading\n");
1284                 return -ENODEV;
1285         }
1286
1287         find_quirks();
1288
1289         /*
1290          * Detect which ACPI-WMI interface we're using.
1291          */
1292         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1293                 interface = &AMW0_V2_interface;
1294
1295         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1296                 interface = &wmid_interface;
1297
1298         if (wmi_has_guid(WMID_GUID2) && interface) {
1299                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1300                         printk(ACER_ERR "Unable to detect available WMID "
1301                                         "devices\n");
1302                         return -ENODEV;
1303                 }
1304         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1305                 printk(ACER_ERR "No WMID device detection method found\n");
1306                 return -ENODEV;
1307         }
1308
1309         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1310                 interface = &AMW0_interface;
1311
1312                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1313                         printk(ACER_ERR "Unable to detect available AMW0 "
1314                                         "devices\n");
1315                         return -ENODEV;
1316                 }
1317         }
1318
1319         if (wmi_has_guid(AMW0_GUID1))
1320                 AMW0_find_mailled();
1321
1322         if (!interface) {
1323                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1324                                 "load\n");
1325                 return -ENODEV;
1326         }
1327
1328         set_quirks();
1329
1330         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1331                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1332                 printk(ACER_INFO "Brightness must be controlled by "
1333                        "generic video driver\n");
1334         }
1335
1336         if (platform_driver_register(&acer_platform_driver)) {
1337                 printk(ACER_ERR "Unable to register platform driver.\n");
1338                 goto error_platform_register;
1339         }
1340         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1341         platform_device_add(acer_platform_device);
1342
1343         err = create_sysfs();
1344         if (err)
1345                 return err;
1346
1347         if (wmi_has_guid(WMID_GUID2)) {
1348                 interface->debug.wmid_devices = get_wmid_devices();
1349                 err = create_debugfs();
1350                 if (err)
1351                         return err;
1352         }
1353
1354         /* Override any initial settings with values from the commandline */
1355         acer_commandline_init();
1356
1357         return 0;
1358
1359 error_platform_register:
1360         return -ENODEV;
1361 }
1362
1363 static void __exit acer_wmi_exit(void)
1364 {
1365         remove_sysfs(acer_platform_device);
1366         remove_debugfs();
1367         platform_device_del(acer_platform_device);
1368         platform_driver_unregister(&acer_platform_driver);
1369
1370         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1371         return;
1372 }
1373
1374 module_init(acer_wmi_init);
1375 module_exit(acer_wmi_exit);