Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...
[linux-2.6] / drivers / misc / acer-wmi.c
1 /*
2  *  Acer WMI Laptop Extras
3  *
4  *  Copyright (C) 2007-2008     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 #define ACER_WMI_VERSION        "0.1"
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/dmi.h>
32 #include <linux/backlight.h>
33 #include <linux/leds.h>
34 #include <linux/platform_device.h>
35 #include <linux/acpi.h>
36 #include <linux/i8042.h>
37
38 #include <acpi/acpi_drivers.h>
39
40 MODULE_AUTHOR("Carlos Corbacho");
41 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
42 MODULE_LICENSE("GPL");
43
44 #define ACER_LOGPREFIX "acer-wmi: "
45 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
46 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
47 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
48
49 /*
50  * The following defines quirks to get some specific functions to work
51  * which are known to not be supported over ACPI-WMI (such as the mail LED
52  * on WMID based Acer's)
53  */
54 struct acer_quirks {
55         const char *vendor;
56         const char *model;
57         u16 quirks;
58 };
59
60 /*
61  * Magic Number
62  * Meaning is unknown - this number is required for writing to ACPI for AMW0
63  * (it's also used in acerhk when directly accessing the BIOS)
64  */
65 #define ACER_AMW0_WRITE 0x9610
66
67 /*
68  * Bit masks for the AMW0 interface
69  */
70 #define ACER_AMW0_WIRELESS_MASK  0x35
71 #define ACER_AMW0_BLUETOOTH_MASK 0x34
72 #define ACER_AMW0_MAILLED_MASK   0x31
73
74 /*
75  * Method IDs for WMID interface
76  */
77 #define ACER_WMID_GET_WIRELESS_METHODID         1
78 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
79 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
80 #define ACER_WMID_SET_WIRELESS_METHODID         4
81 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
82 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
83 #define ACER_WMID_GET_THREEG_METHODID           10
84 #define ACER_WMID_SET_THREEG_METHODID           11
85
86 /*
87  * Acer ACPI method GUIDs
88  */
89 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
90 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
91 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
92
93 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
94 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
95
96 /* Temporary workaround until the WMI sysfs interface goes in */
97 MODULE_ALIAS("dmi:*:*Acer*:*:");
98
99 /*
100  * Interface capability flags
101  */
102 #define ACER_CAP_MAILLED                (1<<0)
103 #define ACER_CAP_WIRELESS               (1<<1)
104 #define ACER_CAP_BLUETOOTH              (1<<2)
105 #define ACER_CAP_BRIGHTNESS             (1<<3)
106 #define ACER_CAP_THREEG                 (1<<4)
107 #define ACER_CAP_ANY                    (0xFFFFFFFF)
108
109 /*
110  * Interface type flags
111  */
112 enum interface_flags {
113         ACER_AMW0,
114         ACER_AMW0_V2,
115         ACER_WMID,
116 };
117
118 #define ACER_DEFAULT_WIRELESS  0
119 #define ACER_DEFAULT_BLUETOOTH 0
120 #define ACER_DEFAULT_MAILLED   0
121 #define ACER_DEFAULT_THREEG    0
122
123 static int max_brightness = 0xF;
124
125 static int wireless = -1;
126 static int bluetooth = -1;
127 static int mailled = -1;
128 static int brightness = -1;
129 static int threeg = -1;
130 static int force_series;
131
132 module_param(mailled, int, 0444);
133 module_param(wireless, int, 0444);
134 module_param(bluetooth, int, 0444);
135 module_param(brightness, int, 0444);
136 module_param(threeg, int, 0444);
137 module_param(force_series, int, 0444);
138 MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
139 MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
140 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
141 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
142 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
143 MODULE_PARM_DESC(force_series, "Force a different laptop series");
144
145 struct acer_data {
146         int mailled;
147         int wireless;
148         int bluetooth;
149         int threeg;
150         int brightness;
151 };
152
153 /* Each low-level interface must define at least some of the following */
154 struct wmi_interface {
155         /* The WMI device type */
156         u32 type;
157
158         /* The capabilities this interface provides */
159         u32 capability;
160
161         /* Private data for the current interface */
162         struct acer_data data;
163 };
164
165 /* The static interface pointer, points to the currently detected interface */
166 static struct wmi_interface *interface;
167
168 /*
169  * Embedded Controller quirks
170  * Some laptops require us to directly access the EC to either enable or query
171  * features that are not available through WMI.
172  */
173
174 struct quirk_entry {
175         u8 wireless;
176         u8 mailled;
177         u8 brightness;
178         u8 bluetooth;
179 };
180
181 static struct quirk_entry *quirks;
182
183 static void set_quirks(void)
184 {
185         if (quirks->mailled)
186                 interface->capability |= ACER_CAP_MAILLED;
187
188         if (quirks->brightness)
189                 interface->capability |= ACER_CAP_BRIGHTNESS;
190 }
191
192 static int dmi_matched(const struct dmi_system_id *dmi)
193 {
194         quirks = dmi->driver_data;
195         return 0;
196 }
197
198 static struct quirk_entry quirk_unknown = {
199 };
200
201 static struct quirk_entry quirk_acer_travelmate_2490 = {
202         .mailled = 1,
203 };
204
205 /* This AMW0 laptop has no bluetooth */
206 static struct quirk_entry quirk_medion_md_98300 = {
207         .wireless = 1,
208 };
209
210 static struct dmi_system_id acer_quirks[] = {
211         {
212                 .callback = dmi_matched,
213                 .ident = "Acer Aspire 3100",
214                 .matches = {
215                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
216                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
217                 },
218                 .driver_data = &quirk_acer_travelmate_2490,
219         },
220         {
221                 .callback = dmi_matched,
222                 .ident = "Acer Aspire 5100",
223                 .matches = {
224                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
225                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
226                 },
227                 .driver_data = &quirk_acer_travelmate_2490,
228         },
229         {
230                 .callback = dmi_matched,
231                 .ident = "Acer Aspire 5630",
232                 .matches = {
233                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
234                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
235                 },
236                 .driver_data = &quirk_acer_travelmate_2490,
237         },
238         {
239                 .callback = dmi_matched,
240                 .ident = "Acer Aspire 5650",
241                 .matches = {
242                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
243                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
244                 },
245                 .driver_data = &quirk_acer_travelmate_2490,
246         },
247         {
248                 .callback = dmi_matched,
249                 .ident = "Acer Aspire 5680",
250                 .matches = {
251                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
252                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
253                 },
254                 .driver_data = &quirk_acer_travelmate_2490,
255         },
256         {
257                 .callback = dmi_matched,
258                 .ident = "Acer Aspire 9110",
259                 .matches = {
260                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
261                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
262                 },
263                 .driver_data = &quirk_acer_travelmate_2490,
264         },
265         {
266                 .callback = dmi_matched,
267                 .ident = "Acer TravelMate 2490",
268                 .matches = {
269                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
270                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
271                 },
272                 .driver_data = &quirk_acer_travelmate_2490,
273         },
274         {
275                 .callback = dmi_matched,
276                 .ident = "Medion MD 98300",
277                 .matches = {
278                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
279                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
280                 },
281                 .driver_data = &quirk_medion_md_98300,
282         },
283         {}
284 };
285
286 /* Find which quirks are needed for a particular vendor/ model pair */
287 static void find_quirks(void)
288 {
289         if (!force_series) {
290                 dmi_check_system(acer_quirks);
291         } else if (force_series == 2490) {
292                 quirks = &quirk_acer_travelmate_2490;
293         }
294
295         if (quirks == NULL)
296                 quirks = &quirk_unknown;
297
298         set_quirks();
299 }
300
301 /*
302  * General interface convenience methods
303  */
304
305 static bool has_cap(u32 cap)
306 {
307         if ((interface->capability & cap) != 0)
308                 return 1;
309
310         return 0;
311 }
312
313 /*
314  * AMW0 (V1) interface
315  */
316 struct wmab_args {
317         u32 eax;
318         u32 ebx;
319         u32 ecx;
320         u32 edx;
321 };
322
323 struct wmab_ret {
324         u32 eax;
325         u32 ebx;
326         u32 ecx;
327         u32 edx;
328         u32 eex;
329 };
330
331 static acpi_status wmab_execute(struct wmab_args *regbuf,
332 struct acpi_buffer *result)
333 {
334         struct acpi_buffer input;
335         acpi_status status;
336         input.length = sizeof(struct wmab_args);
337         input.pointer = (u8 *)regbuf;
338
339         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
340
341         return status;
342 }
343
344 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
345 struct wmi_interface *iface)
346 {
347         int err;
348         u8 result;
349
350         switch (cap) {
351         case ACER_CAP_MAILLED:
352                 switch (quirks->mailled) {
353                 default:
354                         err = ec_read(0xA, &result);
355                         if (err)
356                                 return AE_ERROR;
357                         *value = (result >> 7) & 0x1;
358                         return AE_OK;
359                 }
360                 break;
361         case ACER_CAP_WIRELESS:
362                 switch (quirks->wireless) {
363                 case 1:
364                         err = ec_read(0x7B, &result);
365                         if (err)
366                                 return AE_ERROR;
367                         *value = result & 0x1;
368                         return AE_OK;
369                 default:
370                         err = ec_read(0xA, &result);
371                         if (err)
372                                 return AE_ERROR;
373                         *value = (result >> 2) & 0x1;
374                         return AE_OK;
375                 }
376                 break;
377         case ACER_CAP_BLUETOOTH:
378                 switch (quirks->bluetooth) {
379                 default:
380                         err = ec_read(0xA, &result);
381                         if (err)
382                                 return AE_ERROR;
383                         *value = (result >> 4) & 0x1;
384                         return AE_OK;
385                 }
386                 break;
387         case ACER_CAP_BRIGHTNESS:
388                 switch (quirks->brightness) {
389                 default:
390                         err = ec_read(0x83, &result);
391                         if (err)
392                                 return AE_ERROR;
393                         *value = result;
394                         return AE_OK;
395                 }
396                 break;
397         default:
398                 return AE_BAD_ADDRESS;
399         }
400         return AE_OK;
401 }
402
403 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
404 {
405         struct wmab_args args;
406
407         args.eax = ACER_AMW0_WRITE;
408         args.ebx = value ? (1<<8) : 0;
409         args.ecx = args.edx = 0;
410
411         switch (cap) {
412         case ACER_CAP_MAILLED:
413                 if (value > 1)
414                         return AE_BAD_PARAMETER;
415                 args.ebx |= ACER_AMW0_MAILLED_MASK;
416                 break;
417         case ACER_CAP_WIRELESS:
418                 if (value > 1)
419                         return AE_BAD_PARAMETER;
420                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
421                 break;
422         case ACER_CAP_BLUETOOTH:
423                 if (value > 1)
424                         return AE_BAD_PARAMETER;
425                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
426                 break;
427         case ACER_CAP_BRIGHTNESS:
428                 if (value > max_brightness)
429                         return AE_BAD_PARAMETER;
430                 switch (quirks->brightness) {
431                 case 1:
432                         return ec_write(0x83, value);
433                 default:
434                         return AE_BAD_ADDRESS;
435                 break;
436                 }
437         default:
438                 return AE_BAD_ADDRESS;
439         }
440
441         /* Actually do the set */
442         return wmab_execute(&args, NULL);
443 }
444
445 static acpi_status AMW0_find_mailled(void)
446 {
447         struct wmab_args args;
448         struct wmab_ret ret;
449         acpi_status status = AE_OK;
450         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
451         union acpi_object *obj;
452
453         args.eax = 0x86;
454         args.ebx = args.ecx = args.edx = 0;
455
456         status = wmab_execute(&args, &out);
457         if (ACPI_FAILURE(status))
458                 return status;
459
460         obj = (union acpi_object *) out.pointer;
461         if (obj && obj->type == ACPI_TYPE_BUFFER &&
462         obj->buffer.length == sizeof(struct wmab_ret)) {
463                 ret = *((struct wmab_ret *) obj->buffer.pointer);
464         } else {
465                 return AE_ERROR;
466         }
467
468         if (ret.eex & 0x1)
469                 interface->capability |= ACER_CAP_MAILLED;
470
471         kfree(out.pointer);
472
473         return AE_OK;
474 }
475
476 static acpi_status AMW0_set_capabilities(void)
477 {
478         struct wmab_args args;
479         struct wmab_ret ret;
480         acpi_status status = AE_OK;
481         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
482         union acpi_object *obj;
483
484         args.eax = ACER_AMW0_WRITE;
485         args.ecx = args.edx = 0;
486
487         args.ebx = 0xa2 << 8;
488         args.ebx |= ACER_AMW0_WIRELESS_MASK;
489
490         status = wmab_execute(&args, &out);
491         if (ACPI_FAILURE(status))
492                 return status;
493
494         obj = (union acpi_object *) out.pointer;
495         if (obj && obj->type == ACPI_TYPE_BUFFER &&
496         obj->buffer.length == sizeof(struct wmab_ret)) {
497                 ret = *((struct wmab_ret *) obj->buffer.pointer);
498         } else {
499                 return AE_ERROR;
500         }
501
502         if (ret.eax & 0x1)
503                 interface->capability |= ACER_CAP_WIRELESS;
504
505         args.ebx = 2 << 8;
506         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
507
508         status = wmab_execute(&args, &out);
509         if (ACPI_FAILURE(status))
510                 return status;
511
512         obj = (union acpi_object *) out.pointer;
513         if (obj && obj->type == ACPI_TYPE_BUFFER
514         && obj->buffer.length == sizeof(struct wmab_ret)) {
515                 ret = *((struct wmab_ret *) obj->buffer.pointer);
516         } else {
517                 return AE_ERROR;
518         }
519
520         if (ret.eax & 0x1)
521                 interface->capability |= ACER_CAP_BLUETOOTH;
522
523         kfree(out.pointer);
524
525         /*
526          * This appears to be safe to enable, since all Wistron based laptops
527          * appear to use the same EC register for brightness, even if they
528          * differ for wireless, etc
529          */
530         interface->capability |= ACER_CAP_BRIGHTNESS;
531
532         return AE_OK;
533 }
534
535 static struct wmi_interface AMW0_interface = {
536         .type = ACER_AMW0,
537 };
538
539 static struct wmi_interface AMW0_V2_interface = {
540         .type = ACER_AMW0_V2,
541 };
542
543 /*
544  * New interface (The WMID interface)
545  */
546 static acpi_status
547 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
548 {
549         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
550         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
551         union acpi_object *obj;
552         u32 tmp;
553         acpi_status status;
554
555         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
556
557         if (ACPI_FAILURE(status))
558                 return status;
559
560         obj = (union acpi_object *) result.pointer;
561         if (obj && obj->type == ACPI_TYPE_BUFFER &&
562                 obj->buffer.length == sizeof(u32)) {
563                 tmp = *((u32 *) obj->buffer.pointer);
564         } else {
565                 tmp = 0;
566         }
567
568         if (out)
569                 *out = tmp;
570
571         kfree(result.pointer);
572
573         return status;
574 }
575
576 static acpi_status WMID_get_u32(u32 *value, u32 cap,
577 struct wmi_interface *iface)
578 {
579         acpi_status status;
580         u8 tmp;
581         u32 result, method_id = 0;
582
583         switch (cap) {
584         case ACER_CAP_WIRELESS:
585                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
586                 break;
587         case ACER_CAP_BLUETOOTH:
588                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
589                 break;
590         case ACER_CAP_BRIGHTNESS:
591                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
592                 break;
593         case ACER_CAP_THREEG:
594                 method_id = ACER_WMID_GET_THREEG_METHODID;
595                 break;
596         case ACER_CAP_MAILLED:
597                 if (quirks->mailled == 1) {
598                         ec_read(0x9f, &tmp);
599                         *value = tmp & 0x1;
600                         return 0;
601                 }
602         default:
603                 return AE_BAD_ADDRESS;
604         }
605         status = WMI_execute_u32(method_id, 0, &result);
606
607         if (ACPI_SUCCESS(status))
608                 *value = (u8)result;
609
610         return status;
611 }
612
613 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
614 {
615         u32 method_id = 0;
616         char param;
617
618         switch (cap) {
619         case ACER_CAP_BRIGHTNESS:
620                 if (value > max_brightness)
621                         return AE_BAD_PARAMETER;
622                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
623                 break;
624         case ACER_CAP_WIRELESS:
625                 if (value > 1)
626                         return AE_BAD_PARAMETER;
627                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
628                 break;
629         case ACER_CAP_BLUETOOTH:
630                 if (value > 1)
631                         return AE_BAD_PARAMETER;
632                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
633                 break;
634         case ACER_CAP_THREEG:
635                 if (value > 1)
636                         return AE_BAD_PARAMETER;
637                 method_id = ACER_WMID_SET_THREEG_METHODID;
638                 break;
639         case ACER_CAP_MAILLED:
640                 if (value > 1)
641                         return AE_BAD_PARAMETER;
642                 if (quirks->mailled == 1) {
643                         param = value ? 0x92 : 0x93;
644                         i8042_command(&param, 0x1059);
645                         return 0;
646                 }
647                 break;
648         default:
649                 return AE_BAD_ADDRESS;
650         }
651         return WMI_execute_u32(method_id, (u32)value, NULL);
652 }
653
654 static acpi_status WMID_set_capabilities(void)
655 {
656         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
657         union acpi_object *obj;
658         acpi_status status;
659         u32 devices;
660
661         status = wmi_query_block(WMID_GUID2, 1, &out);
662         if (ACPI_FAILURE(status))
663                 return status;
664
665         obj = (union acpi_object *) out.pointer;
666         if (obj && obj->type == ACPI_TYPE_BUFFER &&
667                 obj->buffer.length == sizeof(u32)) {
668                 devices = *((u32 *) obj->buffer.pointer);
669         } else {
670                 return AE_ERROR;
671         }
672
673         /* Not sure on the meaning of the relevant bits yet to detect these */
674         interface->capability |= ACER_CAP_WIRELESS;
675         interface->capability |= ACER_CAP_THREEG;
676
677         /* WMID always provides brightness methods */
678         interface->capability |= ACER_CAP_BRIGHTNESS;
679
680         if (devices & 0x10)
681                 interface->capability |= ACER_CAP_BLUETOOTH;
682
683         if (!(devices & 0x20))
684                 max_brightness = 0x9;
685
686         return status;
687 }
688
689 static struct wmi_interface wmid_interface = {
690         .type = ACER_WMID,
691 };
692
693 /*
694  * Generic Device (interface-independent)
695  */
696
697 static acpi_status get_u32(u32 *value, u32 cap)
698 {
699         acpi_status status = AE_BAD_ADDRESS;
700
701         switch (interface->type) {
702         case ACER_AMW0:
703                 status = AMW0_get_u32(value, cap, interface);
704                 break;
705         case ACER_AMW0_V2:
706                 if (cap == ACER_CAP_MAILLED) {
707                         status = AMW0_get_u32(value, cap, interface);
708                         break;
709                 }
710         case ACER_WMID:
711                 status = WMID_get_u32(value, cap, interface);
712                 break;
713         }
714
715         return status;
716 }
717
718 static acpi_status set_u32(u32 value, u32 cap)
719 {
720         if (interface->capability & cap) {
721                 switch (interface->type) {
722                 case ACER_AMW0:
723                         return AMW0_set_u32(value, cap, interface);
724                 case ACER_AMW0_V2:
725                 case ACER_WMID:
726                         return WMID_set_u32(value, cap, interface);
727                 default:
728                         return AE_BAD_PARAMETER;
729                 }
730         }
731         return AE_BAD_PARAMETER;
732 }
733
734 static void __init acer_commandline_init(void)
735 {
736         /*
737          * These will all fail silently if the value given is invalid, or the
738          * capability isn't available on the given interface
739          */
740         set_u32(mailled, ACER_CAP_MAILLED);
741         set_u32(wireless, ACER_CAP_WIRELESS);
742         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
743         set_u32(threeg, ACER_CAP_THREEG);
744         set_u32(brightness, ACER_CAP_BRIGHTNESS);
745 }
746
747 /*
748  * LED device (Mail LED only, no other LEDs known yet)
749  */
750 static void mail_led_set(struct led_classdev *led_cdev,
751 enum led_brightness value)
752 {
753         set_u32(value, ACER_CAP_MAILLED);
754 }
755
756 static struct led_classdev mail_led = {
757         .name = "acer-mail:green",
758         .brightness_set = mail_led_set,
759 };
760
761 static int __init acer_led_init(struct device *dev)
762 {
763         return led_classdev_register(dev, &mail_led);
764 }
765
766 static void acer_led_exit(void)
767 {
768         led_classdev_unregister(&mail_led);
769 }
770
771 /*
772  * Backlight device
773  */
774 static struct backlight_device *acer_backlight_device;
775
776 static int read_brightness(struct backlight_device *bd)
777 {
778         u32 value;
779         get_u32(&value, ACER_CAP_BRIGHTNESS);
780         return value;
781 }
782
783 static int update_bl_status(struct backlight_device *bd)
784 {
785         set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
786         return 0;
787 }
788
789 static struct backlight_ops acer_bl_ops = {
790         .get_brightness = read_brightness,
791         .update_status = update_bl_status,
792 };
793
794 static int __init acer_backlight_init(struct device *dev)
795 {
796         struct backlight_device *bd;
797
798         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
799         if (IS_ERR(bd)) {
800                 printk(ACER_ERR "Could not register Acer backlight device\n");
801                 acer_backlight_device = NULL;
802                 return PTR_ERR(bd);
803         }
804
805         acer_backlight_device = bd;
806
807         bd->props.max_brightness = max_brightness;
808         bd->props.brightness = read_brightness(NULL);
809         backlight_update_status(bd);
810         return 0;
811 }
812
813 static void __exit acer_backlight_exit(void)
814 {
815         backlight_device_unregister(acer_backlight_device);
816 }
817
818 /*
819  * Read/ write bool sysfs macro
820  */
821 #define show_set_bool(value, cap) \
822 static ssize_t \
823 show_bool_##value(struct device *dev, struct device_attribute *attr, \
824         char *buf) \
825 { \
826         u32 result; \
827         acpi_status status = get_u32(&result, cap); \
828         if (ACPI_SUCCESS(status)) \
829                 return sprintf(buf, "%u\n", result); \
830         return sprintf(buf, "Read error\n"); \
831 } \
832 \
833 static ssize_t \
834 set_bool_##value(struct device *dev, struct device_attribute *attr, \
835         const char *buf, size_t count) \
836 { \
837         u32 tmp = simple_strtoul(buf, NULL, 10); \
838         acpi_status status = set_u32(tmp, cap); \
839                 if (ACPI_FAILURE(status)) \
840                         return -EINVAL; \
841         return count; \
842 } \
843 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
844         show_bool_##value, set_bool_##value);
845
846 show_set_bool(wireless, ACER_CAP_WIRELESS);
847 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
848 show_set_bool(threeg, ACER_CAP_THREEG);
849
850 /*
851  * Read interface sysfs macro
852  */
853 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
854         char *buf)
855 {
856         switch (interface->type) {
857         case ACER_AMW0:
858                 return sprintf(buf, "AMW0\n");
859         case ACER_AMW0_V2:
860                 return sprintf(buf, "AMW0 v2\n");
861         case ACER_WMID:
862                 return sprintf(buf, "WMID\n");
863         default:
864                 return sprintf(buf, "Error!\n");
865         }
866 }
867
868 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
869         show_interface, NULL);
870
871 /*
872  * Platform device
873  */
874 static int __devinit acer_platform_probe(struct platform_device *device)
875 {
876         int err;
877
878         if (has_cap(ACER_CAP_MAILLED)) {
879                 err = acer_led_init(&device->dev);
880                 if (err)
881                         goto error_mailled;
882         }
883
884         if (has_cap(ACER_CAP_BRIGHTNESS)) {
885                 err = acer_backlight_init(&device->dev);
886                 if (err)
887                         goto error_brightness;
888         }
889
890         return 0;
891
892 error_brightness:
893         acer_led_exit();
894 error_mailled:
895         return err;
896 }
897
898 static int acer_platform_remove(struct platform_device *device)
899 {
900         if (has_cap(ACER_CAP_MAILLED))
901                 acer_led_exit();
902         if (has_cap(ACER_CAP_BRIGHTNESS))
903                 acer_backlight_exit();
904         return 0;
905 }
906
907 static int acer_platform_suspend(struct platform_device *dev,
908 pm_message_t state)
909 {
910         u32 value;
911         struct acer_data *data = &interface->data;
912
913         if (!data)
914                 return -ENOMEM;
915
916         if (has_cap(ACER_CAP_WIRELESS)) {
917                 get_u32(&value, ACER_CAP_WIRELESS);
918                 data->wireless = value;
919         }
920
921         if (has_cap(ACER_CAP_BLUETOOTH)) {
922                 get_u32(&value, ACER_CAP_BLUETOOTH);
923                 data->bluetooth = value;
924         }
925
926         if (has_cap(ACER_CAP_MAILLED)) {
927                 get_u32(&value, ACER_CAP_MAILLED);
928                 data->mailled = value;
929         }
930
931         if (has_cap(ACER_CAP_BRIGHTNESS)) {
932                 get_u32(&value, ACER_CAP_BRIGHTNESS);
933                 data->brightness = value;
934         }
935
936         return 0;
937 }
938
939 static int acer_platform_resume(struct platform_device *device)
940 {
941         struct acer_data *data = &interface->data;
942
943         if (!data)
944                 return -ENOMEM;
945
946         if (has_cap(ACER_CAP_WIRELESS))
947                 set_u32(data->wireless, ACER_CAP_WIRELESS);
948
949         if (has_cap(ACER_CAP_BLUETOOTH))
950                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
951
952         if (has_cap(ACER_CAP_THREEG))
953                 set_u32(data->threeg, ACER_CAP_THREEG);
954
955         if (has_cap(ACER_CAP_MAILLED))
956                 set_u32(data->mailled, ACER_CAP_MAILLED);
957
958         if (has_cap(ACER_CAP_BRIGHTNESS))
959                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
960
961         return 0;
962 }
963
964 static struct platform_driver acer_platform_driver = {
965         .driver = {
966                 .name = "acer-wmi",
967                 .owner = THIS_MODULE,
968         },
969         .probe = acer_platform_probe,
970         .remove = acer_platform_remove,
971         .suspend = acer_platform_suspend,
972         .resume = acer_platform_resume,
973 };
974
975 static struct platform_device *acer_platform_device;
976
977 static int remove_sysfs(struct platform_device *device)
978 {
979         if (has_cap(ACER_CAP_WIRELESS))
980                 device_remove_file(&device->dev, &dev_attr_wireless);
981
982         if (has_cap(ACER_CAP_BLUETOOTH))
983                 device_remove_file(&device->dev, &dev_attr_bluetooth);
984
985         if (has_cap(ACER_CAP_THREEG))
986                 device_remove_file(&device->dev, &dev_attr_threeg);
987
988         device_remove_file(&device->dev, &dev_attr_interface);
989
990         return 0;
991 }
992
993 static int create_sysfs(void)
994 {
995         int retval = -ENOMEM;
996
997         if (has_cap(ACER_CAP_WIRELESS)) {
998                 retval = device_create_file(&acer_platform_device->dev,
999                         &dev_attr_wireless);
1000                 if (retval)
1001                         goto error_sysfs;
1002         }
1003
1004         if (has_cap(ACER_CAP_BLUETOOTH)) {
1005                 retval = device_create_file(&acer_platform_device->dev,
1006                         &dev_attr_bluetooth);
1007                 if (retval)
1008                         goto error_sysfs;
1009         }
1010
1011         if (has_cap(ACER_CAP_THREEG)) {
1012                 retval = device_create_file(&acer_platform_device->dev,
1013                         &dev_attr_threeg);
1014                 if (retval)
1015                         goto error_sysfs;
1016         }
1017
1018         retval = device_create_file(&acer_platform_device->dev,
1019                 &dev_attr_interface);
1020         if (retval)
1021                 goto error_sysfs;
1022
1023         return 0;
1024
1025 error_sysfs:
1026                 remove_sysfs(acer_platform_device);
1027         return retval;
1028 }
1029
1030 static int __init acer_wmi_init(void)
1031 {
1032         int err;
1033
1034         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1035                         ACER_WMI_VERSION);
1036
1037         /*
1038          * Detect which ACPI-WMI interface we're using.
1039          */
1040         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1041                 interface = &AMW0_V2_interface;
1042
1043         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1044                 interface = &wmid_interface;
1045
1046         if (wmi_has_guid(WMID_GUID2) && interface) {
1047                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1048                         printk(ACER_ERR "Unable to detect available devices\n");
1049                         return -ENODEV;
1050                 }
1051         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1052                 printk(ACER_ERR "Unable to detect available devices\n");
1053                 return -ENODEV;
1054         }
1055
1056         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1057                 interface = &AMW0_interface;
1058
1059                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1060                         printk(ACER_ERR "Unable to detect available devices\n");
1061                         return -ENODEV;
1062                 }
1063         }
1064
1065         if (wmi_has_guid(AMW0_GUID1)) {
1066                 if (ACPI_FAILURE(AMW0_find_mailled()))
1067                         printk(ACER_ERR "Unable to detect mail LED\n");
1068         }
1069
1070         find_quirks();
1071
1072         if (!interface) {
1073                 printk(ACER_ERR "No or unsupported WMI interface, unable to ");
1074                 printk(KERN_CONT "load.\n");
1075                 return -ENODEV;
1076         }
1077
1078         if (platform_driver_register(&acer_platform_driver)) {
1079                 printk(ACER_ERR "Unable to register platform driver.\n");
1080                 goto error_platform_register;
1081         }
1082         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1083         platform_device_add(acer_platform_device);
1084
1085         err = create_sysfs();
1086         if (err)
1087                 return err;
1088
1089         /* Override any initial settings with values from the commandline */
1090         acer_commandline_init();
1091
1092         return 0;
1093
1094 error_platform_register:
1095         return -ENODEV;
1096 }
1097
1098 static void __exit acer_wmi_exit(void)
1099 {
1100         remove_sysfs(acer_platform_device);
1101         platform_device_del(acer_platform_device);
1102         platform_driver_unregister(&acer_platform_driver);
1103
1104         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1105         return;
1106 }
1107
1108 module_init(acer_wmi_init);
1109 module_exit(acer_wmi_exit);