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