acer-wmi: set permissions on interface file to S_IRUGO
[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 #include <linux/slab.h>
40
41 #include <acpi/acpi_drivers.h>
42
43 MODULE_AUTHOR("Carlos Corbacho");
44 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
45 MODULE_LICENSE("GPL");
46
47 #define ACER_LOGPREFIX "acer-wmi: "
48 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
49 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
50 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
51
52 /*
53  * The following defines quirks to get some specific functions to work
54  * which are known to not be supported over ACPI-WMI (such as the mail LED
55  * on WMID based Acer's)
56  */
57 struct acer_quirks {
58         const char *vendor;
59         const char *model;
60         u16 quirks;
61 };
62
63 /*
64  * Magic Number
65  * Meaning is unknown - this number is required for writing to ACPI for AMW0
66  * (it's also used in acerhk when directly accessing the BIOS)
67  */
68 #define ACER_AMW0_WRITE 0x9610
69
70 /*
71  * Bit masks for the AMW0 interface
72  */
73 #define ACER_AMW0_WIRELESS_MASK  0x35
74 #define ACER_AMW0_BLUETOOTH_MASK 0x34
75 #define ACER_AMW0_MAILLED_MASK   0x31
76
77 /*
78  * Method IDs for WMID interface
79  */
80 #define ACER_WMID_GET_WIRELESS_METHODID         1
81 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
82 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
83 #define ACER_WMID_SET_WIRELESS_METHODID         4
84 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
85 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
86 #define ACER_WMID_GET_THREEG_METHODID           10
87 #define ACER_WMID_SET_THREEG_METHODID           11
88
89 /*
90  * Acer ACPI method GUIDs
91  */
92 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
93 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
94 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
95 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
96
97 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
98 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
99
100 /*
101  * Interface capability flags
102  */
103 #define ACER_CAP_MAILLED                (1<<0)
104 #define ACER_CAP_WIRELESS               (1<<1)
105 #define ACER_CAP_BLUETOOTH              (1<<2)
106 #define ACER_CAP_BRIGHTNESS             (1<<3)
107 #define ACER_CAP_THREEG                 (1<<4)
108 #define ACER_CAP_ANY                    (0xFFFFFFFF)
109
110 /*
111  * Interface type flags
112  */
113 enum interface_flags {
114         ACER_AMW0,
115         ACER_AMW0_V2,
116         ACER_WMID,
117 };
118
119 #define ACER_DEFAULT_WIRELESS  0
120 #define ACER_DEFAULT_BLUETOOTH 0
121 #define ACER_DEFAULT_MAILLED   0
122 #define ACER_DEFAULT_THREEG    0
123
124 static int max_brightness = 0xF;
125
126 static int mailled = -1;
127 static int brightness = -1;
128 static int threeg = -1;
129 static int force_series;
130
131 module_param(mailled, int, 0444);
132 module_param(brightness, int, 0444);
133 module_param(threeg, int, 0444);
134 module_param(force_series, int, 0444);
135 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
136 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
137 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
138 MODULE_PARM_DESC(force_series, "Force a different laptop series");
139
140 struct acer_data {
141         int mailled;
142         int threeg;
143         int brightness;
144 };
145
146 struct acer_debug {
147         struct dentry *root;
148         struct dentry *devices;
149         u32 wmid_devices;
150 };
151
152 static struct rfkill *wireless_rfkill;
153 static struct rfkill *bluetooth_rfkill;
154
155 /* Each low-level interface must define at least some of the following */
156 struct wmi_interface {
157         /* The WMI device type */
158         u32 type;
159
160         /* The capabilities this interface provides */
161         u32 capability;
162
163         /* Private data for the current interface */
164         struct acer_data data;
165
166         /* debugfs entries associated with this interface */
167         struct acer_debug debug;
168 };
169
170 /* The static interface pointer, points to the currently detected interface */
171 static struct wmi_interface *interface;
172
173 /*
174  * Embedded Controller quirks
175  * Some laptops require us to directly access the EC to either enable or query
176  * features that are not available through WMI.
177  */
178
179 struct quirk_entry {
180         u8 wireless;
181         u8 mailled;
182         s8 brightness;
183         u8 bluetooth;
184 };
185
186 static struct quirk_entry *quirks;
187
188 static void set_quirks(void)
189 {
190         if (!interface)
191                 return;
192
193         if (quirks->mailled)
194                 interface->capability |= ACER_CAP_MAILLED;
195
196         if (quirks->brightness)
197                 interface->capability |= ACER_CAP_BRIGHTNESS;
198 }
199
200 static int dmi_matched(const struct dmi_system_id *dmi)
201 {
202         quirks = dmi->driver_data;
203         return 0;
204 }
205
206 static struct quirk_entry quirk_unknown = {
207 };
208
209 static struct quirk_entry quirk_acer_aspire_1520 = {
210         .brightness = -1,
211 };
212
213 static struct quirk_entry quirk_acer_travelmate_2490 = {
214         .mailled = 1,
215 };
216
217 /* This AMW0 laptop has no bluetooth */
218 static struct quirk_entry quirk_medion_md_98300 = {
219         .wireless = 1,
220 };
221
222 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
223         .wireless = 2,
224 };
225
226 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
227 static struct dmi_system_id __devinitdata acer_blacklist[] = {
228         {
229                 .ident = "Acer Aspire One (SSD)",
230                 .matches = {
231                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
232                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
233                 },
234         },
235         {
236                 .ident = "Acer Aspire One (HDD)",
237                 .matches = {
238                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
239                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
240                 },
241         },
242         {}
243 };
244
245 static struct dmi_system_id acer_quirks[] = {
246         {
247                 .callback = dmi_matched,
248                 .ident = "Acer Aspire 1360",
249                 .matches = {
250                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
251                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
252                 },
253                 .driver_data = &quirk_acer_aspire_1520,
254         },
255         {
256                 .callback = dmi_matched,
257                 .ident = "Acer Aspire 1520",
258                 .matches = {
259                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
260                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
261                 },
262                 .driver_data = &quirk_acer_aspire_1520,
263         },
264         {
265                 .callback = dmi_matched,
266                 .ident = "Acer Aspire 3100",
267                 .matches = {
268                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
269                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
270                 },
271                 .driver_data = &quirk_acer_travelmate_2490,
272         },
273         {
274                 .callback = dmi_matched,
275                 .ident = "Acer Aspire 3610",
276                 .matches = {
277                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
278                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
279                 },
280                 .driver_data = &quirk_acer_travelmate_2490,
281         },
282         {
283                 .callback = dmi_matched,
284                 .ident = "Acer Aspire 5100",
285                 .matches = {
286                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
287                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
288                 },
289                 .driver_data = &quirk_acer_travelmate_2490,
290         },
291         {
292                 .callback = dmi_matched,
293                 .ident = "Acer Aspire 5610",
294                 .matches = {
295                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
296                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
297                 },
298                 .driver_data = &quirk_acer_travelmate_2490,
299         },
300         {
301                 .callback = dmi_matched,
302                 .ident = "Acer Aspire 5630",
303                 .matches = {
304                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
305                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
306                 },
307                 .driver_data = &quirk_acer_travelmate_2490,
308         },
309         {
310                 .callback = dmi_matched,
311                 .ident = "Acer Aspire 5650",
312                 .matches = {
313                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
314                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
315                 },
316                 .driver_data = &quirk_acer_travelmate_2490,
317         },
318         {
319                 .callback = dmi_matched,
320                 .ident = "Acer Aspire 5680",
321                 .matches = {
322                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
323                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
324                 },
325                 .driver_data = &quirk_acer_travelmate_2490,
326         },
327         {
328                 .callback = dmi_matched,
329                 .ident = "Acer Aspire 9110",
330                 .matches = {
331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
333                 },
334                 .driver_data = &quirk_acer_travelmate_2490,
335         },
336         {
337                 .callback = dmi_matched,
338                 .ident = "Acer TravelMate 2490",
339                 .matches = {
340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
341                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
342                 },
343                 .driver_data = &quirk_acer_travelmate_2490,
344         },
345         {
346                 .callback = dmi_matched,
347                 .ident = "Acer TravelMate 4200",
348                 .matches = {
349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
350                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
351                 },
352                 .driver_data = &quirk_acer_travelmate_2490,
353         },
354         {
355                 .callback = dmi_matched,
356                 .ident = "Fujitsu Siemens Amilo Li 1718",
357                 .matches = {
358                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
359                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
360                 },
361                 .driver_data = &quirk_fujitsu_amilo_li_1718,
362         },
363         {
364                 .callback = dmi_matched,
365                 .ident = "Medion MD 98300",
366                 .matches = {
367                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
368                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
369                 },
370                 .driver_data = &quirk_medion_md_98300,
371         },
372         {}
373 };
374
375 /* Find which quirks are needed for a particular vendor/ model pair */
376 static void find_quirks(void)
377 {
378         if (!force_series) {
379                 dmi_check_system(acer_quirks);
380         } else if (force_series == 2490) {
381                 quirks = &quirk_acer_travelmate_2490;
382         }
383
384         if (quirks == NULL)
385                 quirks = &quirk_unknown;
386
387         set_quirks();
388 }
389
390 /*
391  * General interface convenience methods
392  */
393
394 static bool has_cap(u32 cap)
395 {
396         if ((interface->capability & cap) != 0)
397                 return 1;
398
399         return 0;
400 }
401
402 /*
403  * AMW0 (V1) interface
404  */
405 struct wmab_args {
406         u32 eax;
407         u32 ebx;
408         u32 ecx;
409         u32 edx;
410 };
411
412 struct wmab_ret {
413         u32 eax;
414         u32 ebx;
415         u32 ecx;
416         u32 edx;
417         u32 eex;
418 };
419
420 static acpi_status wmab_execute(struct wmab_args *regbuf,
421 struct acpi_buffer *result)
422 {
423         struct acpi_buffer input;
424         acpi_status status;
425         input.length = sizeof(struct wmab_args);
426         input.pointer = (u8 *)regbuf;
427
428         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
429
430         return status;
431 }
432
433 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
434 struct wmi_interface *iface)
435 {
436         int err;
437         u8 result;
438
439         switch (cap) {
440         case ACER_CAP_MAILLED:
441                 switch (quirks->mailled) {
442                 default:
443                         err = ec_read(0xA, &result);
444                         if (err)
445                                 return AE_ERROR;
446                         *value = (result >> 7) & 0x1;
447                         return AE_OK;
448                 }
449                 break;
450         case ACER_CAP_WIRELESS:
451                 switch (quirks->wireless) {
452                 case 1:
453                         err = ec_read(0x7B, &result);
454                         if (err)
455                                 return AE_ERROR;
456                         *value = result & 0x1;
457                         return AE_OK;
458                 case 2:
459                         err = ec_read(0x71, &result);
460                         if (err)
461                                 return AE_ERROR;
462                         *value = result & 0x1;
463                         return AE_OK;
464                 default:
465                         err = ec_read(0xA, &result);
466                         if (err)
467                                 return AE_ERROR;
468                         *value = (result >> 2) & 0x1;
469                         return AE_OK;
470                 }
471                 break;
472         case ACER_CAP_BLUETOOTH:
473                 switch (quirks->bluetooth) {
474                 default:
475                         err = ec_read(0xA, &result);
476                         if (err)
477                                 return AE_ERROR;
478                         *value = (result >> 4) & 0x1;
479                         return AE_OK;
480                 }
481                 break;
482         case ACER_CAP_BRIGHTNESS:
483                 switch (quirks->brightness) {
484                 default:
485                         err = ec_read(0x83, &result);
486                         if (err)
487                                 return AE_ERROR;
488                         *value = result;
489                         return AE_OK;
490                 }
491                 break;
492         default:
493                 return AE_ERROR;
494         }
495         return AE_OK;
496 }
497
498 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
499 {
500         struct wmab_args args;
501
502         args.eax = ACER_AMW0_WRITE;
503         args.ebx = value ? (1<<8) : 0;
504         args.ecx = args.edx = 0;
505
506         switch (cap) {
507         case ACER_CAP_MAILLED:
508                 if (value > 1)
509                         return AE_BAD_PARAMETER;
510                 args.ebx |= ACER_AMW0_MAILLED_MASK;
511                 break;
512         case ACER_CAP_WIRELESS:
513                 if (value > 1)
514                         return AE_BAD_PARAMETER;
515                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
516                 break;
517         case ACER_CAP_BLUETOOTH:
518                 if (value > 1)
519                         return AE_BAD_PARAMETER;
520                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
521                 break;
522         case ACER_CAP_BRIGHTNESS:
523                 if (value > max_brightness)
524                         return AE_BAD_PARAMETER;
525                 switch (quirks->brightness) {
526                 default:
527                         return ec_write(0x83, value);
528                         break;
529                 }
530         default:
531                 return AE_ERROR;
532         }
533
534         /* Actually do the set */
535         return wmab_execute(&args, NULL);
536 }
537
538 static acpi_status AMW0_find_mailled(void)
539 {
540         struct wmab_args args;
541         struct wmab_ret ret;
542         acpi_status status = AE_OK;
543         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
544         union acpi_object *obj;
545
546         args.eax = 0x86;
547         args.ebx = args.ecx = args.edx = 0;
548
549         status = wmab_execute(&args, &out);
550         if (ACPI_FAILURE(status))
551                 return status;
552
553         obj = (union acpi_object *) out.pointer;
554         if (obj && obj->type == ACPI_TYPE_BUFFER &&
555         obj->buffer.length == sizeof(struct wmab_ret)) {
556                 ret = *((struct wmab_ret *) obj->buffer.pointer);
557         } else {
558                 return AE_ERROR;
559         }
560
561         if (ret.eex & 0x1)
562                 interface->capability |= ACER_CAP_MAILLED;
563
564         kfree(out.pointer);
565
566         return AE_OK;
567 }
568
569 static acpi_status AMW0_set_capabilities(void)
570 {
571         struct wmab_args args;
572         struct wmab_ret ret;
573         acpi_status status = AE_OK;
574         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
575         union acpi_object *obj;
576
577         /*
578          * On laptops with this strange GUID (non Acer), normal probing doesn't
579          * work.
580          */
581         if (wmi_has_guid(AMW0_GUID2)) {
582                 interface->capability |= ACER_CAP_WIRELESS;
583                 return AE_OK;
584         }
585
586         args.eax = ACER_AMW0_WRITE;
587         args.ecx = args.edx = 0;
588
589         args.ebx = 0xa2 << 8;
590         args.ebx |= ACER_AMW0_WIRELESS_MASK;
591
592         status = wmab_execute(&args, &out);
593         if (ACPI_FAILURE(status))
594                 return status;
595
596         obj = (union acpi_object *) out.pointer;
597         if (obj && obj->type == ACPI_TYPE_BUFFER &&
598         obj->buffer.length == sizeof(struct wmab_ret)) {
599                 ret = *((struct wmab_ret *) obj->buffer.pointer);
600         } else {
601                 return AE_ERROR;
602         }
603
604         if (ret.eax & 0x1)
605                 interface->capability |= ACER_CAP_WIRELESS;
606
607         args.ebx = 2 << 8;
608         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
609
610         status = wmab_execute(&args, &out);
611         if (ACPI_FAILURE(status))
612                 return status;
613
614         obj = (union acpi_object *) out.pointer;
615         if (obj && obj->type == ACPI_TYPE_BUFFER
616         && obj->buffer.length == sizeof(struct wmab_ret)) {
617                 ret = *((struct wmab_ret *) obj->buffer.pointer);
618         } else {
619                 return AE_ERROR;
620         }
621
622         if (ret.eax & 0x1)
623                 interface->capability |= ACER_CAP_BLUETOOTH;
624
625         kfree(out.pointer);
626
627         /*
628          * This appears to be safe to enable, since all Wistron based laptops
629          * appear to use the same EC register for brightness, even if they
630          * differ for wireless, etc
631          */
632         if (quirks->brightness >= 0)
633                 interface->capability |= ACER_CAP_BRIGHTNESS;
634
635         return AE_OK;
636 }
637
638 static struct wmi_interface AMW0_interface = {
639         .type = ACER_AMW0,
640 };
641
642 static struct wmi_interface AMW0_V2_interface = {
643         .type = ACER_AMW0_V2,
644 };
645
646 /*
647  * New interface (The WMID interface)
648  */
649 static acpi_status
650 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
651 {
652         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
653         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
654         union acpi_object *obj;
655         u32 tmp;
656         acpi_status status;
657
658         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
659
660         if (ACPI_FAILURE(status))
661                 return status;
662
663         obj = (union acpi_object *) result.pointer;
664         if (obj && obj->type == ACPI_TYPE_BUFFER &&
665                 obj->buffer.length == sizeof(u32)) {
666                 tmp = *((u32 *) obj->buffer.pointer);
667         } else {
668                 tmp = 0;
669         }
670
671         if (out)
672                 *out = tmp;
673
674         kfree(result.pointer);
675
676         return status;
677 }
678
679 static acpi_status WMID_get_u32(u32 *value, u32 cap,
680 struct wmi_interface *iface)
681 {
682         acpi_status status;
683         u8 tmp;
684         u32 result, method_id = 0;
685
686         switch (cap) {
687         case ACER_CAP_WIRELESS:
688                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
689                 break;
690         case ACER_CAP_BLUETOOTH:
691                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
692                 break;
693         case ACER_CAP_BRIGHTNESS:
694                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
695                 break;
696         case ACER_CAP_THREEG:
697                 method_id = ACER_WMID_GET_THREEG_METHODID;
698                 break;
699         case ACER_CAP_MAILLED:
700                 if (quirks->mailled == 1) {
701                         ec_read(0x9f, &tmp);
702                         *value = tmp & 0x1;
703                         return 0;
704                 }
705         default:
706                 return AE_ERROR;
707         }
708         status = WMI_execute_u32(method_id, 0, &result);
709
710         if (ACPI_SUCCESS(status))
711                 *value = (u8)result;
712
713         return status;
714 }
715
716 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
717 {
718         u32 method_id = 0;
719         char param;
720
721         switch (cap) {
722         case ACER_CAP_BRIGHTNESS:
723                 if (value > max_brightness)
724                         return AE_BAD_PARAMETER;
725                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
726                 break;
727         case ACER_CAP_WIRELESS:
728                 if (value > 1)
729                         return AE_BAD_PARAMETER;
730                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
731                 break;
732         case ACER_CAP_BLUETOOTH:
733                 if (value > 1)
734                         return AE_BAD_PARAMETER;
735                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
736                 break;
737         case ACER_CAP_THREEG:
738                 if (value > 1)
739                         return AE_BAD_PARAMETER;
740                 method_id = ACER_WMID_SET_THREEG_METHODID;
741                 break;
742         case ACER_CAP_MAILLED:
743                 if (value > 1)
744                         return AE_BAD_PARAMETER;
745                 if (quirks->mailled == 1) {
746                         param = value ? 0x92 : 0x93;
747                         i8042_lock_chip();
748                         i8042_command(&param, 0x1059);
749                         i8042_unlock_chip();
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_properties props;
927         struct backlight_device *bd;
928
929         memset(&props, 0, sizeof(struct backlight_properties));
930         props.max_brightness = max_brightness;
931         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
932                                        &props);
933         if (IS_ERR(bd)) {
934                 printk(ACER_ERR "Could not register Acer backlight device\n");
935                 acer_backlight_device = NULL;
936                 return PTR_ERR(bd);
937         }
938
939         acer_backlight_device = bd;
940
941         bd->props.power = FB_BLANK_UNBLANK;
942         bd->props.brightness = read_brightness(bd);
943         backlight_update_status(bd);
944         return 0;
945 }
946
947 static void acer_backlight_exit(void)
948 {
949         backlight_device_unregister(acer_backlight_device);
950 }
951
952 /*
953  * Rfkill devices
954  */
955 static void acer_rfkill_update(struct work_struct *ignored);
956 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
957 static void acer_rfkill_update(struct work_struct *ignored)
958 {
959         u32 state;
960         acpi_status status;
961
962         status = get_u32(&state, ACER_CAP_WIRELESS);
963         if (ACPI_SUCCESS(status))
964                 rfkill_set_sw_state(wireless_rfkill, !state);
965
966         if (has_cap(ACER_CAP_BLUETOOTH)) {
967                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
968                 if (ACPI_SUCCESS(status))
969                         rfkill_set_sw_state(bluetooth_rfkill, !state);
970         }
971
972         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
973 }
974
975 static int acer_rfkill_set(void *data, bool blocked)
976 {
977         acpi_status status;
978         u32 cap = (unsigned long)data;
979         status = set_u32(!blocked, cap);
980         if (ACPI_FAILURE(status))
981                 return -ENODEV;
982         return 0;
983 }
984
985 static const struct rfkill_ops acer_rfkill_ops = {
986         .set_block = acer_rfkill_set,
987 };
988
989 static struct rfkill *acer_rfkill_register(struct device *dev,
990                                            enum rfkill_type type,
991                                            char *name, u32 cap)
992 {
993         int err;
994         struct rfkill *rfkill_dev;
995
996         rfkill_dev = rfkill_alloc(name, dev, type,
997                                   &acer_rfkill_ops,
998                                   (void *)(unsigned long)cap);
999         if (!rfkill_dev)
1000                 return ERR_PTR(-ENOMEM);
1001
1002         err = rfkill_register(rfkill_dev);
1003         if (err) {
1004                 rfkill_destroy(rfkill_dev);
1005                 return ERR_PTR(err);
1006         }
1007         return rfkill_dev;
1008 }
1009
1010 static int acer_rfkill_init(struct device *dev)
1011 {
1012         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1013                 "acer-wireless", ACER_CAP_WIRELESS);
1014         if (IS_ERR(wireless_rfkill))
1015                 return PTR_ERR(wireless_rfkill);
1016
1017         if (has_cap(ACER_CAP_BLUETOOTH)) {
1018                 bluetooth_rfkill = acer_rfkill_register(dev,
1019                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1020                         ACER_CAP_BLUETOOTH);
1021                 if (IS_ERR(bluetooth_rfkill)) {
1022                         rfkill_unregister(wireless_rfkill);
1023                         rfkill_destroy(wireless_rfkill);
1024                         return PTR_ERR(bluetooth_rfkill);
1025                 }
1026         }
1027
1028         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1029
1030         return 0;
1031 }
1032
1033 static void acer_rfkill_exit(void)
1034 {
1035         cancel_delayed_work_sync(&acer_rfkill_work);
1036
1037         rfkill_unregister(wireless_rfkill);
1038         rfkill_destroy(wireless_rfkill);
1039
1040         if (has_cap(ACER_CAP_BLUETOOTH)) {
1041                 rfkill_unregister(bluetooth_rfkill);
1042                 rfkill_destroy(bluetooth_rfkill);
1043         }
1044         return;
1045 }
1046
1047 /*
1048  * sysfs interface
1049  */
1050 static ssize_t show_bool_threeg(struct device *dev,
1051         struct device_attribute *attr, char *buf)
1052 {
1053         u32 result; \
1054         acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1055         if (ACPI_SUCCESS(status))
1056                 return sprintf(buf, "%u\n", result);
1057         return sprintf(buf, "Read error\n");
1058 }
1059
1060 static ssize_t set_bool_threeg(struct device *dev,
1061         struct device_attribute *attr, const char *buf, size_t count)
1062 {
1063         u32 tmp = simple_strtoul(buf, NULL, 10);
1064         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1065                 if (ACPI_FAILURE(status))
1066                         return -EINVAL;
1067         return count;
1068 }
1069 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1070         set_bool_threeg);
1071
1072 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1073         char *buf)
1074 {
1075         switch (interface->type) {
1076         case ACER_AMW0:
1077                 return sprintf(buf, "AMW0\n");
1078         case ACER_AMW0_V2:
1079                 return sprintf(buf, "AMW0 v2\n");
1080         case ACER_WMID:
1081                 return sprintf(buf, "WMID\n");
1082         default:
1083                 return sprintf(buf, "Error!\n");
1084         }
1085 }
1086
1087 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1088
1089 /*
1090  * debugfs functions
1091  */
1092 static u32 get_wmid_devices(void)
1093 {
1094         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1095         union acpi_object *obj;
1096         acpi_status status;
1097
1098         status = wmi_query_block(WMID_GUID2, 1, &out);
1099         if (ACPI_FAILURE(status))
1100                 return 0;
1101
1102         obj = (union acpi_object *) out.pointer;
1103         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1104                 obj->buffer.length == sizeof(u32)) {
1105                 return *((u32 *) obj->buffer.pointer);
1106         } else {
1107                 return 0;
1108         }
1109 }
1110
1111 /*
1112  * Platform device
1113  */
1114 static int __devinit acer_platform_probe(struct platform_device *device)
1115 {
1116         int err;
1117
1118         if (has_cap(ACER_CAP_MAILLED)) {
1119                 err = acer_led_init(&device->dev);
1120                 if (err)
1121                         goto error_mailled;
1122         }
1123
1124         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1125                 err = acer_backlight_init(&device->dev);
1126                 if (err)
1127                         goto error_brightness;
1128         }
1129
1130         err = acer_rfkill_init(&device->dev);
1131         if (err)
1132                 goto error_rfkill;
1133
1134         return err;
1135
1136 error_rfkill:
1137         if (has_cap(ACER_CAP_BRIGHTNESS))
1138                 acer_backlight_exit();
1139 error_brightness:
1140         if (has_cap(ACER_CAP_MAILLED))
1141                 acer_led_exit();
1142 error_mailled:
1143         return err;
1144 }
1145
1146 static int acer_platform_remove(struct platform_device *device)
1147 {
1148         if (has_cap(ACER_CAP_MAILLED))
1149                 acer_led_exit();
1150         if (has_cap(ACER_CAP_BRIGHTNESS))
1151                 acer_backlight_exit();
1152
1153         acer_rfkill_exit();
1154         return 0;
1155 }
1156
1157 static int acer_platform_suspend(struct platform_device *dev,
1158 pm_message_t state)
1159 {
1160         u32 value;
1161         struct acer_data *data = &interface->data;
1162
1163         if (!data)
1164                 return -ENOMEM;
1165
1166         if (has_cap(ACER_CAP_MAILLED)) {
1167                 get_u32(&value, ACER_CAP_MAILLED);
1168                 data->mailled = value;
1169         }
1170
1171         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1172                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1173                 data->brightness = value;
1174         }
1175
1176         return 0;
1177 }
1178
1179 static int acer_platform_resume(struct platform_device *device)
1180 {
1181         struct acer_data *data = &interface->data;
1182
1183         if (!data)
1184                 return -ENOMEM;
1185
1186         if (has_cap(ACER_CAP_MAILLED))
1187                 set_u32(data->mailled, ACER_CAP_MAILLED);
1188
1189         if (has_cap(ACER_CAP_BRIGHTNESS))
1190                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1191
1192         return 0;
1193 }
1194
1195 static struct platform_driver acer_platform_driver = {
1196         .driver = {
1197                 .name = "acer-wmi",
1198                 .owner = THIS_MODULE,
1199         },
1200         .probe = acer_platform_probe,
1201         .remove = acer_platform_remove,
1202         .suspend = acer_platform_suspend,
1203         .resume = acer_platform_resume,
1204 };
1205
1206 static struct platform_device *acer_platform_device;
1207
1208 static int remove_sysfs(struct platform_device *device)
1209 {
1210         if (has_cap(ACER_CAP_THREEG))
1211                 device_remove_file(&device->dev, &dev_attr_threeg);
1212
1213         device_remove_file(&device->dev, &dev_attr_interface);
1214
1215         return 0;
1216 }
1217
1218 static int create_sysfs(void)
1219 {
1220         int retval = -ENOMEM;
1221
1222         if (has_cap(ACER_CAP_THREEG)) {
1223                 retval = device_create_file(&acer_platform_device->dev,
1224                         &dev_attr_threeg);
1225                 if (retval)
1226                         goto error_sysfs;
1227         }
1228
1229         retval = device_create_file(&acer_platform_device->dev,
1230                 &dev_attr_interface);
1231         if (retval)
1232                 goto error_sysfs;
1233
1234         return 0;
1235
1236 error_sysfs:
1237                 remove_sysfs(acer_platform_device);
1238         return retval;
1239 }
1240
1241 static void remove_debugfs(void)
1242 {
1243         debugfs_remove(interface->debug.devices);
1244         debugfs_remove(interface->debug.root);
1245 }
1246
1247 static int create_debugfs(void)
1248 {
1249         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1250         if (!interface->debug.root) {
1251                 printk(ACER_ERR "Failed to create debugfs directory");
1252                 return -ENOMEM;
1253         }
1254
1255         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1256                                         interface->debug.root,
1257                                         &interface->debug.wmid_devices);
1258         if (!interface->debug.devices)
1259                 goto error_debugfs;
1260
1261         return 0;
1262
1263 error_debugfs:
1264         remove_debugfs();
1265         return -ENOMEM;
1266 }
1267
1268 static int __init acer_wmi_init(void)
1269 {
1270         int err;
1271
1272         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1273
1274         if (dmi_check_system(acer_blacklist)) {
1275                 printk(ACER_INFO "Blacklisted hardware detected - "
1276                                 "not loading\n");
1277                 return -ENODEV;
1278         }
1279
1280         find_quirks();
1281
1282         /*
1283          * Detect which ACPI-WMI interface we're using.
1284          */
1285         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1286                 interface = &AMW0_V2_interface;
1287
1288         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1289                 interface = &wmid_interface;
1290
1291         if (wmi_has_guid(WMID_GUID2) && interface) {
1292                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1293                         printk(ACER_ERR "Unable to detect available WMID "
1294                                         "devices\n");
1295                         return -ENODEV;
1296                 }
1297         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1298                 printk(ACER_ERR "No WMID device detection method found\n");
1299                 return -ENODEV;
1300         }
1301
1302         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1303                 interface = &AMW0_interface;
1304
1305                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1306                         printk(ACER_ERR "Unable to detect available AMW0 "
1307                                         "devices\n");
1308                         return -ENODEV;
1309                 }
1310         }
1311
1312         if (wmi_has_guid(AMW0_GUID1))
1313                 AMW0_find_mailled();
1314
1315         if (!interface) {
1316                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1317                                 "load\n");
1318                 return -ENODEV;
1319         }
1320
1321         set_quirks();
1322
1323         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1324                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1325                 printk(ACER_INFO "Brightness must be controlled by "
1326                        "generic video driver\n");
1327         }
1328
1329         err = platform_driver_register(&acer_platform_driver);
1330         if (err) {
1331                 printk(ACER_ERR "Unable to register platform driver.\n");
1332                 goto error_platform_register;
1333         }
1334
1335         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1336         if (!acer_platform_device) {
1337                 err = -ENOMEM;
1338                 goto error_device_alloc;
1339         }
1340
1341         err = platform_device_add(acer_platform_device);
1342         if (err)
1343                 goto error_device_add;
1344
1345         err = create_sysfs();
1346         if (err)
1347                 goto error_create_sys;
1348
1349         if (wmi_has_guid(WMID_GUID2)) {
1350                 interface->debug.wmid_devices = get_wmid_devices();
1351                 err = create_debugfs();
1352                 if (err)
1353                         goto error_create_debugfs;
1354         }
1355
1356         /* Override any initial settings with values from the commandline */
1357         acer_commandline_init();
1358
1359         return 0;
1360
1361 error_create_debugfs:
1362         remove_sysfs(acer_platform_device);
1363 error_create_sys:
1364         platform_device_del(acer_platform_device);
1365 error_device_add:
1366         platform_device_put(acer_platform_device);
1367 error_device_alloc:
1368         platform_driver_unregister(&acer_platform_driver);
1369 error_platform_register:
1370         return err;
1371 }
1372
1373 static void __exit acer_wmi_exit(void)
1374 {
1375         remove_sysfs(acer_platform_device);
1376         remove_debugfs();
1377         platform_device_unregister(acer_platform_device);
1378         platform_driver_unregister(&acer_platform_driver);
1379
1380         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1381         return;
1382 }
1383
1384 module_init(acer_wmi_init);
1385 module_exit(acer_wmi_exit);