Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[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 #include <linux/input.h>
41 #include <linux/input/sparse-keymap.h>
42 #include <linux/dmi.h>
43
44 #include <acpi/acpi_drivers.h>
45
46 MODULE_AUTHOR("Carlos Corbacho");
47 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
48 MODULE_LICENSE("GPL");
49
50 #define ACER_LOGPREFIX "acer-wmi: "
51 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
52 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
53 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
54 #define ACER_WARNING KERN_WARNING ACER_LOGPREFIX
55
56 /*
57  * Magic Number
58  * Meaning is unknown - this number is required for writing to ACPI for AMW0
59  * (it's also used in acerhk when directly accessing the BIOS)
60  */
61 #define ACER_AMW0_WRITE 0x9610
62
63 /*
64  * Bit masks for the AMW0 interface
65  */
66 #define ACER_AMW0_WIRELESS_MASK  0x35
67 #define ACER_AMW0_BLUETOOTH_MASK 0x34
68 #define ACER_AMW0_MAILLED_MASK   0x31
69
70 /*
71  * Method IDs for WMID interface
72  */
73 #define ACER_WMID_GET_WIRELESS_METHODID         1
74 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
75 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
76 #define ACER_WMID_SET_WIRELESS_METHODID         4
77 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
78 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
79 #define ACER_WMID_GET_THREEG_METHODID           10
80 #define ACER_WMID_SET_THREEG_METHODID           11
81
82 /*
83  * Acer ACPI method GUIDs
84  */
85 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
86 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
87 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
88 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
89 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
90
91 /*
92  * Acer ACPI event GUIDs
93  */
94 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
95
96 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
97 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
98 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
99
100 enum acer_wmi_event_ids {
101         WMID_HOTKEY_EVENT = 0x1,
102 };
103
104 static const struct key_entry acer_wmi_keymap[] = {
105         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
106         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
107         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
108         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
109         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
110         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
111         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
112         {KE_KEY, 0x82, {KEY_F22} },      /* Touch Pad On/Off */
113         {KE_END, 0}
114 };
115
116 static struct input_dev *acer_wmi_input_dev;
117
118 struct event_return_value {
119         u8 function;
120         u8 key_num;
121         u16 device_state;
122         u32 reserved;
123 } __attribute__((packed));
124
125 /*
126  * GUID3 Get Device Status device flags
127  */
128 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
129 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
130 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
131
132 struct lm_input_params {
133         u8 function_num;        /* Function Number */
134         u16 commun_devices;     /* Communication type devices default status */
135         u16 devices;            /* Other type devices default status */
136         u8 lm_status;           /* Launch Manager Status */
137         u16 reserved;
138 } __attribute__((packed));
139
140 struct lm_return_value {
141         u8 error_code;          /* Error Code */
142         u8 ec_return_value;     /* EC Return Value */
143         u16 reserved;
144 } __attribute__((packed));
145
146 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
147         u8 function_num;        /* Function Number */
148         u8 hotkey_number;       /* Hotkey Number */
149         u16 devices;            /* Get Device */
150 } __attribute__((packed));
151
152 struct wmid3_gds_return_value { /* Get Device Status return value*/
153         u8 error_code;          /* Error Code */
154         u8 ec_return_value;     /* EC Return Value */
155         u16 devices;            /* Current Device Status */
156         u32 reserved;
157 } __attribute__((packed));
158
159 struct hotkey_function_type_aa {
160         u8 type;
161         u8 length;
162         u16 handle;
163         u16 commun_func_bitmap;
164 } __attribute__((packed));
165
166 /*
167  * Interface capability flags
168  */
169 #define ACER_CAP_MAILLED                (1<<0)
170 #define ACER_CAP_WIRELESS               (1<<1)
171 #define ACER_CAP_BLUETOOTH              (1<<2)
172 #define ACER_CAP_BRIGHTNESS             (1<<3)
173 #define ACER_CAP_THREEG                 (1<<4)
174 #define ACER_CAP_ANY                    (0xFFFFFFFF)
175
176 /*
177  * Interface type flags
178  */
179 enum interface_flags {
180         ACER_AMW0,
181         ACER_AMW0_V2,
182         ACER_WMID,
183 };
184
185 #define ACER_DEFAULT_WIRELESS  0
186 #define ACER_DEFAULT_BLUETOOTH 0
187 #define ACER_DEFAULT_MAILLED   0
188 #define ACER_DEFAULT_THREEG    0
189
190 static int max_brightness = 0xF;
191
192 static int mailled = -1;
193 static int brightness = -1;
194 static int threeg = -1;
195 static int force_series;
196 static bool ec_raw_mode;
197 static bool has_type_aa;
198
199 module_param(mailled, int, 0444);
200 module_param(brightness, int, 0444);
201 module_param(threeg, int, 0444);
202 module_param(force_series, int, 0444);
203 module_param(ec_raw_mode, bool, 0444);
204 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
205 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
206 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
207 MODULE_PARM_DESC(force_series, "Force a different laptop series");
208 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
209
210 struct acer_data {
211         int mailled;
212         int threeg;
213         int brightness;
214 };
215
216 struct acer_debug {
217         struct dentry *root;
218         struct dentry *devices;
219         u32 wmid_devices;
220 };
221
222 static struct rfkill *wireless_rfkill;
223 static struct rfkill *bluetooth_rfkill;
224 static struct rfkill *threeg_rfkill;
225
226 /* Each low-level interface must define at least some of the following */
227 struct wmi_interface {
228         /* The WMI device type */
229         u32 type;
230
231         /* The capabilities this interface provides */
232         u32 capability;
233
234         /* Private data for the current interface */
235         struct acer_data data;
236
237         /* debugfs entries associated with this interface */
238         struct acer_debug debug;
239 };
240
241 /* The static interface pointer, points to the currently detected interface */
242 static struct wmi_interface *interface;
243
244 /*
245  * Embedded Controller quirks
246  * Some laptops require us to directly access the EC to either enable or query
247  * features that are not available through WMI.
248  */
249
250 struct quirk_entry {
251         u8 wireless;
252         u8 mailled;
253         s8 brightness;
254         u8 bluetooth;
255 };
256
257 static struct quirk_entry *quirks;
258
259 static void set_quirks(void)
260 {
261         if (!interface)
262                 return;
263
264         if (quirks->mailled)
265                 interface->capability |= ACER_CAP_MAILLED;
266
267         if (quirks->brightness)
268                 interface->capability |= ACER_CAP_BRIGHTNESS;
269 }
270
271 static int dmi_matched(const struct dmi_system_id *dmi)
272 {
273         quirks = dmi->driver_data;
274         return 1;
275 }
276
277 static struct quirk_entry quirk_unknown = {
278 };
279
280 static struct quirk_entry quirk_acer_aspire_1520 = {
281         .brightness = -1,
282 };
283
284 static struct quirk_entry quirk_acer_travelmate_2490 = {
285         .mailled = 1,
286 };
287
288 /* This AMW0 laptop has no bluetooth */
289 static struct quirk_entry quirk_medion_md_98300 = {
290         .wireless = 1,
291 };
292
293 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
294         .wireless = 2,
295 };
296
297 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
298 static struct dmi_system_id __devinitdata acer_blacklist[] = {
299         {
300                 .ident = "Acer Aspire One (SSD)",
301                 .matches = {
302                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
303                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
304                 },
305         },
306         {
307                 .ident = "Acer Aspire One (HDD)",
308                 .matches = {
309                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
310                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
311                 },
312         },
313         {}
314 };
315
316 static struct dmi_system_id acer_quirks[] = {
317         {
318                 .callback = dmi_matched,
319                 .ident = "Acer Aspire 1360",
320                 .matches = {
321                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
322                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
323                 },
324                 .driver_data = &quirk_acer_aspire_1520,
325         },
326         {
327                 .callback = dmi_matched,
328                 .ident = "Acer Aspire 1520",
329                 .matches = {
330                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
331                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
332                 },
333                 .driver_data = &quirk_acer_aspire_1520,
334         },
335         {
336                 .callback = dmi_matched,
337                 .ident = "Acer Aspire 3100",
338                 .matches = {
339                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
340                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
341                 },
342                 .driver_data = &quirk_acer_travelmate_2490,
343         },
344         {
345                 .callback = dmi_matched,
346                 .ident = "Acer Aspire 3610",
347                 .matches = {
348                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
349                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
350                 },
351                 .driver_data = &quirk_acer_travelmate_2490,
352         },
353         {
354                 .callback = dmi_matched,
355                 .ident = "Acer Aspire 5100",
356                 .matches = {
357                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
358                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
359                 },
360                 .driver_data = &quirk_acer_travelmate_2490,
361         },
362         {
363                 .callback = dmi_matched,
364                 .ident = "Acer Aspire 5610",
365                 .matches = {
366                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
367                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
368                 },
369                 .driver_data = &quirk_acer_travelmate_2490,
370         },
371         {
372                 .callback = dmi_matched,
373                 .ident = "Acer Aspire 5630",
374                 .matches = {
375                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
376                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
377                 },
378                 .driver_data = &quirk_acer_travelmate_2490,
379         },
380         {
381                 .callback = dmi_matched,
382                 .ident = "Acer Aspire 5650",
383                 .matches = {
384                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
385                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
386                 },
387                 .driver_data = &quirk_acer_travelmate_2490,
388         },
389         {
390                 .callback = dmi_matched,
391                 .ident = "Acer Aspire 5680",
392                 .matches = {
393                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
394                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
395                 },
396                 .driver_data = &quirk_acer_travelmate_2490,
397         },
398         {
399                 .callback = dmi_matched,
400                 .ident = "Acer Aspire 9110",
401                 .matches = {
402                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
403                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
404                 },
405                 .driver_data = &quirk_acer_travelmate_2490,
406         },
407         {
408                 .callback = dmi_matched,
409                 .ident = "Acer TravelMate 2490",
410                 .matches = {
411                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
412                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
413                 },
414                 .driver_data = &quirk_acer_travelmate_2490,
415         },
416         {
417                 .callback = dmi_matched,
418                 .ident = "Acer TravelMate 4200",
419                 .matches = {
420                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
421                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
422                 },
423                 .driver_data = &quirk_acer_travelmate_2490,
424         },
425         {
426                 .callback = dmi_matched,
427                 .ident = "Fujitsu Siemens Amilo Li 1718",
428                 .matches = {
429                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
430                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
431                 },
432                 .driver_data = &quirk_fujitsu_amilo_li_1718,
433         },
434         {
435                 .callback = dmi_matched,
436                 .ident = "Medion MD 98300",
437                 .matches = {
438                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
439                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
440                 },
441                 .driver_data = &quirk_medion_md_98300,
442         },
443         {}
444 };
445
446 /* Find which quirks are needed for a particular vendor/ model pair */
447 static void find_quirks(void)
448 {
449         if (!force_series) {
450                 dmi_check_system(acer_quirks);
451         } else if (force_series == 2490) {
452                 quirks = &quirk_acer_travelmate_2490;
453         }
454
455         if (quirks == NULL)
456                 quirks = &quirk_unknown;
457
458         set_quirks();
459 }
460
461 /*
462  * General interface convenience methods
463  */
464
465 static bool has_cap(u32 cap)
466 {
467         if ((interface->capability & cap) != 0)
468                 return 1;
469
470         return 0;
471 }
472
473 /*
474  * AMW0 (V1) interface
475  */
476 struct wmab_args {
477         u32 eax;
478         u32 ebx;
479         u32 ecx;
480         u32 edx;
481 };
482
483 struct wmab_ret {
484         u32 eax;
485         u32 ebx;
486         u32 ecx;
487         u32 edx;
488         u32 eex;
489 };
490
491 static acpi_status wmab_execute(struct wmab_args *regbuf,
492 struct acpi_buffer *result)
493 {
494         struct acpi_buffer input;
495         acpi_status status;
496         input.length = sizeof(struct wmab_args);
497         input.pointer = (u8 *)regbuf;
498
499         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
500
501         return status;
502 }
503
504 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
505 struct wmi_interface *iface)
506 {
507         int err;
508         u8 result;
509
510         switch (cap) {
511         case ACER_CAP_MAILLED:
512                 switch (quirks->mailled) {
513                 default:
514                         err = ec_read(0xA, &result);
515                         if (err)
516                                 return AE_ERROR;
517                         *value = (result >> 7) & 0x1;
518                         return AE_OK;
519                 }
520                 break;
521         case ACER_CAP_WIRELESS:
522                 switch (quirks->wireless) {
523                 case 1:
524                         err = ec_read(0x7B, &result);
525                         if (err)
526                                 return AE_ERROR;
527                         *value = result & 0x1;
528                         return AE_OK;
529                 case 2:
530                         err = ec_read(0x71, &result);
531                         if (err)
532                                 return AE_ERROR;
533                         *value = result & 0x1;
534                         return AE_OK;
535                 default:
536                         err = ec_read(0xA, &result);
537                         if (err)
538                                 return AE_ERROR;
539                         *value = (result >> 2) & 0x1;
540                         return AE_OK;
541                 }
542                 break;
543         case ACER_CAP_BLUETOOTH:
544                 switch (quirks->bluetooth) {
545                 default:
546                         err = ec_read(0xA, &result);
547                         if (err)
548                                 return AE_ERROR;
549                         *value = (result >> 4) & 0x1;
550                         return AE_OK;
551                 }
552                 break;
553         case ACER_CAP_BRIGHTNESS:
554                 switch (quirks->brightness) {
555                 default:
556                         err = ec_read(0x83, &result);
557                         if (err)
558                                 return AE_ERROR;
559                         *value = result;
560                         return AE_OK;
561                 }
562                 break;
563         default:
564                 return AE_ERROR;
565         }
566         return AE_OK;
567 }
568
569 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
570 {
571         struct wmab_args args;
572
573         args.eax = ACER_AMW0_WRITE;
574         args.ebx = value ? (1<<8) : 0;
575         args.ecx = args.edx = 0;
576
577         switch (cap) {
578         case ACER_CAP_MAILLED:
579                 if (value > 1)
580                         return AE_BAD_PARAMETER;
581                 args.ebx |= ACER_AMW0_MAILLED_MASK;
582                 break;
583         case ACER_CAP_WIRELESS:
584                 if (value > 1)
585                         return AE_BAD_PARAMETER;
586                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
587                 break;
588         case ACER_CAP_BLUETOOTH:
589                 if (value > 1)
590                         return AE_BAD_PARAMETER;
591                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
592                 break;
593         case ACER_CAP_BRIGHTNESS:
594                 if (value > max_brightness)
595                         return AE_BAD_PARAMETER;
596                 switch (quirks->brightness) {
597                 default:
598                         return ec_write(0x83, value);
599                         break;
600                 }
601         default:
602                 return AE_ERROR;
603         }
604
605         /* Actually do the set */
606         return wmab_execute(&args, NULL);
607 }
608
609 static acpi_status AMW0_find_mailled(void)
610 {
611         struct wmab_args args;
612         struct wmab_ret ret;
613         acpi_status status = AE_OK;
614         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
615         union acpi_object *obj;
616
617         args.eax = 0x86;
618         args.ebx = args.ecx = args.edx = 0;
619
620         status = wmab_execute(&args, &out);
621         if (ACPI_FAILURE(status))
622                 return status;
623
624         obj = (union acpi_object *) out.pointer;
625         if (obj && obj->type == ACPI_TYPE_BUFFER &&
626         obj->buffer.length == sizeof(struct wmab_ret)) {
627                 ret = *((struct wmab_ret *) obj->buffer.pointer);
628         } else {
629                 kfree(out.pointer);
630                 return AE_ERROR;
631         }
632
633         if (ret.eex & 0x1)
634                 interface->capability |= ACER_CAP_MAILLED;
635
636         kfree(out.pointer);
637
638         return AE_OK;
639 }
640
641 static acpi_status AMW0_set_capabilities(void)
642 {
643         struct wmab_args args;
644         struct wmab_ret ret;
645         acpi_status status;
646         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
647         union acpi_object *obj;
648
649         /*
650          * On laptops with this strange GUID (non Acer), normal probing doesn't
651          * work.
652          */
653         if (wmi_has_guid(AMW0_GUID2)) {
654                 interface->capability |= ACER_CAP_WIRELESS;
655                 return AE_OK;
656         }
657
658         args.eax = ACER_AMW0_WRITE;
659         args.ecx = args.edx = 0;
660
661         args.ebx = 0xa2 << 8;
662         args.ebx |= ACER_AMW0_WIRELESS_MASK;
663
664         status = wmab_execute(&args, &out);
665         if (ACPI_FAILURE(status))
666                 return status;
667
668         obj = out.pointer;
669         if (obj && obj->type == ACPI_TYPE_BUFFER &&
670         obj->buffer.length == sizeof(struct wmab_ret)) {
671                 ret = *((struct wmab_ret *) obj->buffer.pointer);
672         } else {
673                 status = AE_ERROR;
674                 goto out;
675         }
676
677         if (ret.eax & 0x1)
678                 interface->capability |= ACER_CAP_WIRELESS;
679
680         args.ebx = 2 << 8;
681         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
682
683         /*
684          * It's ok to use existing buffer for next wmab_execute call.
685          * But we need to kfree(out.pointer) if next wmab_execute fail.
686          */
687         status = wmab_execute(&args, &out);
688         if (ACPI_FAILURE(status))
689                 goto out;
690
691         obj = (union acpi_object *) out.pointer;
692         if (obj && obj->type == ACPI_TYPE_BUFFER
693         && obj->buffer.length == sizeof(struct wmab_ret)) {
694                 ret = *((struct wmab_ret *) obj->buffer.pointer);
695         } else {
696                 status = AE_ERROR;
697                 goto out;
698         }
699
700         if (ret.eax & 0x1)
701                 interface->capability |= ACER_CAP_BLUETOOTH;
702
703         /*
704          * This appears to be safe to enable, since all Wistron based laptops
705          * appear to use the same EC register for brightness, even if they
706          * differ for wireless, etc
707          */
708         if (quirks->brightness >= 0)
709                 interface->capability |= ACER_CAP_BRIGHTNESS;
710
711         status = AE_OK;
712 out:
713         kfree(out.pointer);
714         return status;
715 }
716
717 static struct wmi_interface AMW0_interface = {
718         .type = ACER_AMW0,
719 };
720
721 static struct wmi_interface AMW0_V2_interface = {
722         .type = ACER_AMW0_V2,
723 };
724
725 /*
726  * New interface (The WMID interface)
727  */
728 static acpi_status
729 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
730 {
731         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
732         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
733         union acpi_object *obj;
734         u32 tmp;
735         acpi_status status;
736
737         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
738
739         if (ACPI_FAILURE(status))
740                 return status;
741
742         obj = (union acpi_object *) result.pointer;
743         if (obj && obj->type == ACPI_TYPE_BUFFER &&
744                 obj->buffer.length == sizeof(u32)) {
745                 tmp = *((u32 *) obj->buffer.pointer);
746         } else {
747                 tmp = 0;
748         }
749
750         if (out)
751                 *out = tmp;
752
753         kfree(result.pointer);
754
755         return status;
756 }
757
758 static acpi_status WMID_get_u32(u32 *value, u32 cap,
759 struct wmi_interface *iface)
760 {
761         acpi_status status;
762         u8 tmp;
763         u32 result, method_id = 0;
764
765         switch (cap) {
766         case ACER_CAP_WIRELESS:
767                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
768                 break;
769         case ACER_CAP_BLUETOOTH:
770                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
771                 break;
772         case ACER_CAP_BRIGHTNESS:
773                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
774                 break;
775         case ACER_CAP_THREEG:
776                 method_id = ACER_WMID_GET_THREEG_METHODID;
777                 break;
778         case ACER_CAP_MAILLED:
779                 if (quirks->mailled == 1) {
780                         ec_read(0x9f, &tmp);
781                         *value = tmp & 0x1;
782                         return 0;
783                 }
784         default:
785                 return AE_ERROR;
786         }
787         status = WMI_execute_u32(method_id, 0, &result);
788
789         if (ACPI_SUCCESS(status))
790                 *value = (u8)result;
791
792         return status;
793 }
794
795 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
796 {
797         u32 method_id = 0;
798         char param;
799
800         switch (cap) {
801         case ACER_CAP_BRIGHTNESS:
802                 if (value > max_brightness)
803                         return AE_BAD_PARAMETER;
804                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
805                 break;
806         case ACER_CAP_WIRELESS:
807                 if (value > 1)
808                         return AE_BAD_PARAMETER;
809                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
810                 break;
811         case ACER_CAP_BLUETOOTH:
812                 if (value > 1)
813                         return AE_BAD_PARAMETER;
814                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
815                 break;
816         case ACER_CAP_THREEG:
817                 if (value > 1)
818                         return AE_BAD_PARAMETER;
819                 method_id = ACER_WMID_SET_THREEG_METHODID;
820                 break;
821         case ACER_CAP_MAILLED:
822                 if (value > 1)
823                         return AE_BAD_PARAMETER;
824                 if (quirks->mailled == 1) {
825                         param = value ? 0x92 : 0x93;
826                         i8042_lock_chip();
827                         i8042_command(&param, 0x1059);
828                         i8042_unlock_chip();
829                         return 0;
830                 }
831                 break;
832         default:
833                 return AE_ERROR;
834         }
835         return WMI_execute_u32(method_id, (u32)value, NULL);
836 }
837
838 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
839 {
840         struct hotkey_function_type_aa *type_aa;
841
842         /* We are looking for OEM-specific Type AAh */
843         if (header->type != 0xAA)
844                 return;
845
846         has_type_aa = true;
847         type_aa = (struct hotkey_function_type_aa *) header;
848
849         printk(ACER_INFO "Function bitmap for Communication Button: 0x%x\n",
850                 type_aa->commun_func_bitmap);
851
852         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
853                 interface->capability |= ACER_CAP_WIRELESS;
854         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
855                 interface->capability |= ACER_CAP_THREEG;
856         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
857                 interface->capability |= ACER_CAP_BLUETOOTH;
858 }
859
860 static acpi_status WMID_set_capabilities(void)
861 {
862         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
863         union acpi_object *obj;
864         acpi_status status;
865         u32 devices;
866
867         status = wmi_query_block(WMID_GUID2, 1, &out);
868         if (ACPI_FAILURE(status))
869                 return status;
870
871         obj = (union acpi_object *) out.pointer;
872         if (obj && obj->type == ACPI_TYPE_BUFFER &&
873                 obj->buffer.length == sizeof(u32)) {
874                 devices = *((u32 *) obj->buffer.pointer);
875         } else {
876                 kfree(out.pointer);
877                 return AE_ERROR;
878         }
879
880         dmi_walk(type_aa_dmi_decode, NULL);
881         if (!has_type_aa) {
882                 interface->capability |= ACER_CAP_WIRELESS;
883                 interface->capability |= ACER_CAP_THREEG;
884                 if (devices & 0x10)
885                         interface->capability |= ACER_CAP_BLUETOOTH;
886         }
887
888         /* WMID always provides brightness methods */
889         interface->capability |= ACER_CAP_BRIGHTNESS;
890
891         if (!(devices & 0x20))
892                 max_brightness = 0x9;
893
894         kfree(out.pointer);
895         return status;
896 }
897
898 static struct wmi_interface wmid_interface = {
899         .type = ACER_WMID,
900 };
901
902 /*
903  * Generic Device (interface-independent)
904  */
905
906 static acpi_status get_u32(u32 *value, u32 cap)
907 {
908         acpi_status status = AE_ERROR;
909
910         switch (interface->type) {
911         case ACER_AMW0:
912                 status = AMW0_get_u32(value, cap, interface);
913                 break;
914         case ACER_AMW0_V2:
915                 if (cap == ACER_CAP_MAILLED) {
916                         status = AMW0_get_u32(value, cap, interface);
917                         break;
918                 }
919         case ACER_WMID:
920                 status = WMID_get_u32(value, cap, interface);
921                 break;
922         }
923
924         return status;
925 }
926
927 static acpi_status set_u32(u32 value, u32 cap)
928 {
929         acpi_status status;
930
931         if (interface->capability & cap) {
932                 switch (interface->type) {
933                 case ACER_AMW0:
934                         return AMW0_set_u32(value, cap, interface);
935                 case ACER_AMW0_V2:
936                         if (cap == ACER_CAP_MAILLED)
937                                 return AMW0_set_u32(value, cap, interface);
938
939                         /*
940                          * On some models, some WMID methods don't toggle
941                          * properly. For those cases, we want to run the AMW0
942                          * method afterwards to be certain we've really toggled
943                          * the device state.
944                          */
945                         if (cap == ACER_CAP_WIRELESS ||
946                                 cap == ACER_CAP_BLUETOOTH) {
947                                 status = WMID_set_u32(value, cap, interface);
948                                 if (ACPI_FAILURE(status))
949                                         return status;
950
951                                 return AMW0_set_u32(value, cap, interface);
952                         }
953                 case ACER_WMID:
954                         return WMID_set_u32(value, cap, interface);
955                 default:
956                         return AE_BAD_PARAMETER;
957                 }
958         }
959         return AE_BAD_PARAMETER;
960 }
961
962 static void __init acer_commandline_init(void)
963 {
964         /*
965          * These will all fail silently if the value given is invalid, or the
966          * capability isn't available on the given interface
967          */
968         set_u32(mailled, ACER_CAP_MAILLED);
969         if (!has_type_aa)
970                 set_u32(threeg, ACER_CAP_THREEG);
971         set_u32(brightness, ACER_CAP_BRIGHTNESS);
972 }
973
974 /*
975  * LED device (Mail LED only, no other LEDs known yet)
976  */
977 static void mail_led_set(struct led_classdev *led_cdev,
978 enum led_brightness value)
979 {
980         set_u32(value, ACER_CAP_MAILLED);
981 }
982
983 static struct led_classdev mail_led = {
984         .name = "acer-wmi::mail",
985         .brightness_set = mail_led_set,
986 };
987
988 static int __devinit acer_led_init(struct device *dev)
989 {
990         return led_classdev_register(dev, &mail_led);
991 }
992
993 static void acer_led_exit(void)
994 {
995         led_classdev_unregister(&mail_led);
996 }
997
998 /*
999  * Backlight device
1000  */
1001 static struct backlight_device *acer_backlight_device;
1002
1003 static int read_brightness(struct backlight_device *bd)
1004 {
1005         u32 value;
1006         get_u32(&value, ACER_CAP_BRIGHTNESS);
1007         return value;
1008 }
1009
1010 static int update_bl_status(struct backlight_device *bd)
1011 {
1012         int intensity = bd->props.brightness;
1013
1014         if (bd->props.power != FB_BLANK_UNBLANK)
1015                 intensity = 0;
1016         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1017                 intensity = 0;
1018
1019         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1020
1021         return 0;
1022 }
1023
1024 static const struct backlight_ops acer_bl_ops = {
1025         .get_brightness = read_brightness,
1026         .update_status = update_bl_status,
1027 };
1028
1029 static int __devinit acer_backlight_init(struct device *dev)
1030 {
1031         struct backlight_properties props;
1032         struct backlight_device *bd;
1033
1034         memset(&props, 0, sizeof(struct backlight_properties));
1035         props.max_brightness = max_brightness;
1036         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1037                                        &props);
1038         if (IS_ERR(bd)) {
1039                 printk(ACER_ERR "Could not register Acer backlight device\n");
1040                 acer_backlight_device = NULL;
1041                 return PTR_ERR(bd);
1042         }
1043
1044         acer_backlight_device = bd;
1045
1046         bd->props.power = FB_BLANK_UNBLANK;
1047         bd->props.brightness = read_brightness(bd);
1048         backlight_update_status(bd);
1049         return 0;
1050 }
1051
1052 static void acer_backlight_exit(void)
1053 {
1054         backlight_device_unregister(acer_backlight_device);
1055 }
1056
1057 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1058 {
1059         struct wmid3_gds_return_value return_value;
1060         acpi_status status;
1061         union acpi_object *obj;
1062         struct wmid3_gds_input_param params = {
1063                 .function_num = 0x1,
1064                 .hotkey_number = 0x01,
1065                 .devices = device,
1066         };
1067         struct acpi_buffer input = {
1068                 sizeof(struct wmid3_gds_input_param),
1069                 &params
1070         };
1071         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1072
1073         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1074         if (ACPI_FAILURE(status))
1075                 return status;
1076
1077         obj = output.pointer;
1078
1079         if (!obj)
1080                 return AE_ERROR;
1081         else if (obj->type != ACPI_TYPE_BUFFER) {
1082                 kfree(obj);
1083                 return AE_ERROR;
1084         }
1085         if (obj->buffer.length != 8) {
1086                 printk(ACER_WARNING "Unknown buffer length %d\n",
1087                         obj->buffer.length);
1088                 kfree(obj);
1089                 return AE_ERROR;
1090         }
1091
1092         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1093         kfree(obj);
1094
1095         if (return_value.error_code || return_value.ec_return_value)
1096                 printk(ACER_WARNING "Get Device Status failed: "
1097                         "0x%x - 0x%x\n", return_value.error_code,
1098                         return_value.ec_return_value);
1099         else
1100                 *value = !!(return_value.devices & device);
1101
1102         return status;
1103 }
1104
1105 static acpi_status get_device_status(u32 *value, u32 cap)
1106 {
1107         if (wmi_has_guid(WMID_GUID3)) {
1108                 u16 device;
1109
1110                 switch (cap) {
1111                 case ACER_CAP_WIRELESS:
1112                         device = ACER_WMID3_GDS_WIRELESS;
1113                         break;
1114                 case ACER_CAP_BLUETOOTH:
1115                         device = ACER_WMID3_GDS_BLUETOOTH;
1116                         break;
1117                 case ACER_CAP_THREEG:
1118                         device = ACER_WMID3_GDS_THREEG;
1119                         break;
1120                 default:
1121                         return AE_ERROR;
1122                 }
1123                 return wmid3_get_device_status(value, device);
1124
1125         } else {
1126                 return get_u32(value, cap);
1127         }
1128 }
1129
1130 /*
1131  * Rfkill devices
1132  */
1133 static void acer_rfkill_update(struct work_struct *ignored);
1134 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1135 static void acer_rfkill_update(struct work_struct *ignored)
1136 {
1137         u32 state;
1138         acpi_status status;
1139
1140         status = get_u32(&state, ACER_CAP_WIRELESS);
1141         if (ACPI_SUCCESS(status))
1142                 rfkill_set_sw_state(wireless_rfkill, !state);
1143
1144         if (has_cap(ACER_CAP_BLUETOOTH)) {
1145                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1146                 if (ACPI_SUCCESS(status))
1147                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1148         }
1149
1150         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1151                 status = wmid3_get_device_status(&state,
1152                                 ACER_WMID3_GDS_THREEG);
1153                 if (ACPI_SUCCESS(status))
1154                         rfkill_set_sw_state(threeg_rfkill, !state);
1155         }
1156
1157         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1158 }
1159
1160 static int acer_rfkill_set(void *data, bool blocked)
1161 {
1162         acpi_status status;
1163         u32 cap = (unsigned long)data;
1164         status = set_u32(!blocked, cap);
1165         if (ACPI_FAILURE(status))
1166                 return -ENODEV;
1167         return 0;
1168 }
1169
1170 static const struct rfkill_ops acer_rfkill_ops = {
1171         .set_block = acer_rfkill_set,
1172 };
1173
1174 static struct rfkill *acer_rfkill_register(struct device *dev,
1175                                            enum rfkill_type type,
1176                                            char *name, u32 cap)
1177 {
1178         int err;
1179         struct rfkill *rfkill_dev;
1180         u32 state;
1181         acpi_status status;
1182
1183         rfkill_dev = rfkill_alloc(name, dev, type,
1184                                   &acer_rfkill_ops,
1185                                   (void *)(unsigned long)cap);
1186         if (!rfkill_dev)
1187                 return ERR_PTR(-ENOMEM);
1188
1189         status = get_device_status(&state, cap);
1190         if (ACPI_SUCCESS(status))
1191                 rfkill_init_sw_state(rfkill_dev, !state);
1192
1193         err = rfkill_register(rfkill_dev);
1194         if (err) {
1195                 rfkill_destroy(rfkill_dev);
1196                 return ERR_PTR(err);
1197         }
1198         return rfkill_dev;
1199 }
1200
1201 static int acer_rfkill_init(struct device *dev)
1202 {
1203         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1204                 "acer-wireless", ACER_CAP_WIRELESS);
1205         if (IS_ERR(wireless_rfkill))
1206                 return PTR_ERR(wireless_rfkill);
1207
1208         if (has_cap(ACER_CAP_BLUETOOTH)) {
1209                 bluetooth_rfkill = acer_rfkill_register(dev,
1210                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1211                         ACER_CAP_BLUETOOTH);
1212                 if (IS_ERR(bluetooth_rfkill)) {
1213                         rfkill_unregister(wireless_rfkill);
1214                         rfkill_destroy(wireless_rfkill);
1215                         return PTR_ERR(bluetooth_rfkill);
1216                 }
1217         }
1218
1219         if (has_cap(ACER_CAP_THREEG)) {
1220                 threeg_rfkill = acer_rfkill_register(dev,
1221                         RFKILL_TYPE_WWAN, "acer-threeg",
1222                         ACER_CAP_THREEG);
1223                 if (IS_ERR(threeg_rfkill)) {
1224                         rfkill_unregister(wireless_rfkill);
1225                         rfkill_destroy(wireless_rfkill);
1226                         rfkill_unregister(bluetooth_rfkill);
1227                         rfkill_destroy(bluetooth_rfkill);
1228                         return PTR_ERR(threeg_rfkill);
1229                 }
1230         }
1231
1232         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1233
1234         return 0;
1235 }
1236
1237 static void acer_rfkill_exit(void)
1238 {
1239         cancel_delayed_work_sync(&acer_rfkill_work);
1240
1241         rfkill_unregister(wireless_rfkill);
1242         rfkill_destroy(wireless_rfkill);
1243
1244         if (has_cap(ACER_CAP_BLUETOOTH)) {
1245                 rfkill_unregister(bluetooth_rfkill);
1246                 rfkill_destroy(bluetooth_rfkill);
1247         }
1248
1249         if (has_cap(ACER_CAP_THREEG)) {
1250                 rfkill_unregister(threeg_rfkill);
1251                 rfkill_destroy(threeg_rfkill);
1252         }
1253         return;
1254 }
1255
1256 /*
1257  * sysfs interface
1258  */
1259 static ssize_t show_bool_threeg(struct device *dev,
1260         struct device_attribute *attr, char *buf)
1261 {
1262         u32 result; \
1263         acpi_status status;
1264         if (wmi_has_guid(WMID_GUID3))
1265                 status = wmid3_get_device_status(&result,
1266                                 ACER_WMID3_GDS_THREEG);
1267         else
1268                 status = get_u32(&result, ACER_CAP_THREEG);
1269         if (ACPI_SUCCESS(status))
1270                 return sprintf(buf, "%u\n", result);
1271         return sprintf(buf, "Read error\n");
1272 }
1273
1274 static ssize_t set_bool_threeg(struct device *dev,
1275         struct device_attribute *attr, const char *buf, size_t count)
1276 {
1277         u32 tmp = simple_strtoul(buf, NULL, 10);
1278         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1279                 if (ACPI_FAILURE(status))
1280                         return -EINVAL;
1281         return count;
1282 }
1283 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1284         set_bool_threeg);
1285
1286 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1287         char *buf)
1288 {
1289         switch (interface->type) {
1290         case ACER_AMW0:
1291                 return sprintf(buf, "AMW0\n");
1292         case ACER_AMW0_V2:
1293                 return sprintf(buf, "AMW0 v2\n");
1294         case ACER_WMID:
1295                 return sprintf(buf, "WMID\n");
1296         default:
1297                 return sprintf(buf, "Error!\n");
1298         }
1299 }
1300
1301 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1302
1303 static void acer_wmi_notify(u32 value, void *context)
1304 {
1305         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1306         union acpi_object *obj;
1307         struct event_return_value return_value;
1308         acpi_status status;
1309
1310         status = wmi_get_event_data(value, &response);
1311         if (status != AE_OK) {
1312                 printk(ACER_WARNING "bad event status 0x%x\n", status);
1313                 return;
1314         }
1315
1316         obj = (union acpi_object *)response.pointer;
1317
1318         if (!obj)
1319                 return;
1320         if (obj->type != ACPI_TYPE_BUFFER) {
1321                 printk(ACER_WARNING "Unknown response received %d\n",
1322                         obj->type);
1323                 kfree(obj);
1324                 return;
1325         }
1326         if (obj->buffer.length != 8) {
1327                 printk(ACER_WARNING "Unknown buffer length %d\n",
1328                         obj->buffer.length);
1329                 kfree(obj);
1330                 return;
1331         }
1332
1333         return_value = *((struct event_return_value *)obj->buffer.pointer);
1334         kfree(obj);
1335
1336         switch (return_value.function) {
1337         case WMID_HOTKEY_EVENT:
1338                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1339                                 return_value.key_num, 1, true))
1340                         printk(ACER_WARNING "Unknown key number - 0x%x\n",
1341                                 return_value.key_num);
1342                 break;
1343         default:
1344                 printk(ACER_WARNING "Unknown function number - %d - %d\n",
1345                         return_value.function, return_value.key_num);
1346                 break;
1347         }
1348 }
1349
1350 static acpi_status
1351 wmid3_set_lm_mode(struct lm_input_params *params,
1352                   struct lm_return_value *return_value)
1353 {
1354         acpi_status status;
1355         union acpi_object *obj;
1356
1357         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1358         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1359
1360         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1361         if (ACPI_FAILURE(status))
1362                 return status;
1363
1364         obj = output.pointer;
1365
1366         if (!obj)
1367                 return AE_ERROR;
1368         else if (obj->type != ACPI_TYPE_BUFFER) {
1369                 kfree(obj);
1370                 return AE_ERROR;
1371         }
1372         if (obj->buffer.length != 4) {
1373                 printk(ACER_WARNING "Unknown buffer length %d\n",
1374                        obj->buffer.length);
1375                 kfree(obj);
1376                 return AE_ERROR;
1377         }
1378
1379         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1380         kfree(obj);
1381
1382         return status;
1383 }
1384
1385 static int acer_wmi_enable_ec_raw(void)
1386 {
1387         struct lm_return_value return_value;
1388         acpi_status status;
1389         struct lm_input_params params = {
1390                 .function_num = 0x1,
1391                 .commun_devices = 0xFFFF,
1392                 .devices = 0xFFFF,
1393                 .lm_status = 0x00,            /* Launch Manager Deactive */
1394         };
1395
1396         status = wmid3_set_lm_mode(&params, &return_value);
1397
1398         if (return_value.error_code || return_value.ec_return_value)
1399                 printk(ACER_WARNING "Enabling EC raw mode failed: "
1400                        "0x%x - 0x%x\n", return_value.error_code,
1401                        return_value.ec_return_value);
1402         else
1403                 printk(ACER_INFO "Enabled EC raw mode");
1404
1405         return status;
1406 }
1407
1408 static int acer_wmi_enable_lm(void)
1409 {
1410         struct lm_return_value return_value;
1411         acpi_status status;
1412         struct lm_input_params params = {
1413                 .function_num = 0x1,
1414                 .commun_devices = 0xFFFF,
1415                 .devices = 0xFFFF,
1416                 .lm_status = 0x01,            /* Launch Manager Active */
1417         };
1418
1419         status = wmid3_set_lm_mode(&params, &return_value);
1420
1421         if (return_value.error_code || return_value.ec_return_value)
1422                 printk(ACER_WARNING "Enabling Launch Manager failed: "
1423                        "0x%x - 0x%x\n", return_value.error_code,
1424                        return_value.ec_return_value);
1425
1426         return status;
1427 }
1428
1429 static int __init acer_wmi_input_setup(void)
1430 {
1431         acpi_status status;
1432         int err;
1433
1434         acer_wmi_input_dev = input_allocate_device();
1435         if (!acer_wmi_input_dev)
1436                 return -ENOMEM;
1437
1438         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1439         acer_wmi_input_dev->phys = "wmi/input0";
1440         acer_wmi_input_dev->id.bustype = BUS_HOST;
1441
1442         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1443         if (err)
1444                 goto err_free_dev;
1445
1446         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1447                                                 acer_wmi_notify, NULL);
1448         if (ACPI_FAILURE(status)) {
1449                 err = -EIO;
1450                 goto err_free_keymap;
1451         }
1452
1453         err = input_register_device(acer_wmi_input_dev);
1454         if (err)
1455                 goto err_uninstall_notifier;
1456
1457         return 0;
1458
1459 err_uninstall_notifier:
1460         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1461 err_free_keymap:
1462         sparse_keymap_free(acer_wmi_input_dev);
1463 err_free_dev:
1464         input_free_device(acer_wmi_input_dev);
1465         return err;
1466 }
1467
1468 static void acer_wmi_input_destroy(void)
1469 {
1470         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1471         sparse_keymap_free(acer_wmi_input_dev);
1472         input_unregister_device(acer_wmi_input_dev);
1473 }
1474
1475 /*
1476  * debugfs functions
1477  */
1478 static u32 get_wmid_devices(void)
1479 {
1480         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1481         union acpi_object *obj;
1482         acpi_status status;
1483         u32 devices = 0;
1484
1485         status = wmi_query_block(WMID_GUID2, 1, &out);
1486         if (ACPI_FAILURE(status))
1487                 return 0;
1488
1489         obj = (union acpi_object *) out.pointer;
1490         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1491                 obj->buffer.length == sizeof(u32)) {
1492                 devices = *((u32 *) obj->buffer.pointer);
1493         }
1494
1495         kfree(out.pointer);
1496         return devices;
1497 }
1498
1499 /*
1500  * Platform device
1501  */
1502 static int __devinit acer_platform_probe(struct platform_device *device)
1503 {
1504         int err;
1505
1506         if (has_cap(ACER_CAP_MAILLED)) {
1507                 err = acer_led_init(&device->dev);
1508                 if (err)
1509                         goto error_mailled;
1510         }
1511
1512         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1513                 err = acer_backlight_init(&device->dev);
1514                 if (err)
1515                         goto error_brightness;
1516         }
1517
1518         err = acer_rfkill_init(&device->dev);
1519         if (err)
1520                 goto error_rfkill;
1521
1522         return err;
1523
1524 error_rfkill:
1525         if (has_cap(ACER_CAP_BRIGHTNESS))
1526                 acer_backlight_exit();
1527 error_brightness:
1528         if (has_cap(ACER_CAP_MAILLED))
1529                 acer_led_exit();
1530 error_mailled:
1531         return err;
1532 }
1533
1534 static int acer_platform_remove(struct platform_device *device)
1535 {
1536         if (has_cap(ACER_CAP_MAILLED))
1537                 acer_led_exit();
1538         if (has_cap(ACER_CAP_BRIGHTNESS))
1539                 acer_backlight_exit();
1540
1541         acer_rfkill_exit();
1542         return 0;
1543 }
1544
1545 static int acer_platform_suspend(struct platform_device *dev,
1546 pm_message_t state)
1547 {
1548         u32 value;
1549         struct acer_data *data = &interface->data;
1550
1551         if (!data)
1552                 return -ENOMEM;
1553
1554         if (has_cap(ACER_CAP_MAILLED)) {
1555                 get_u32(&value, ACER_CAP_MAILLED);
1556                 data->mailled = value;
1557         }
1558
1559         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1560                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1561                 data->brightness = value;
1562         }
1563
1564         return 0;
1565 }
1566
1567 static int acer_platform_resume(struct platform_device *device)
1568 {
1569         struct acer_data *data = &interface->data;
1570
1571         if (!data)
1572                 return -ENOMEM;
1573
1574         if (has_cap(ACER_CAP_MAILLED))
1575                 set_u32(data->mailled, ACER_CAP_MAILLED);
1576
1577         if (has_cap(ACER_CAP_BRIGHTNESS))
1578                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1579
1580         return 0;
1581 }
1582
1583 static struct platform_driver acer_platform_driver = {
1584         .driver = {
1585                 .name = "acer-wmi",
1586                 .owner = THIS_MODULE,
1587         },
1588         .probe = acer_platform_probe,
1589         .remove = acer_platform_remove,
1590         .suspend = acer_platform_suspend,
1591         .resume = acer_platform_resume,
1592 };
1593
1594 static struct platform_device *acer_platform_device;
1595
1596 static int remove_sysfs(struct platform_device *device)
1597 {
1598         if (has_cap(ACER_CAP_THREEG))
1599                 device_remove_file(&device->dev, &dev_attr_threeg);
1600
1601         device_remove_file(&device->dev, &dev_attr_interface);
1602
1603         return 0;
1604 }
1605
1606 static int create_sysfs(void)
1607 {
1608         int retval = -ENOMEM;
1609
1610         if (has_cap(ACER_CAP_THREEG)) {
1611                 retval = device_create_file(&acer_platform_device->dev,
1612                         &dev_attr_threeg);
1613                 if (retval)
1614                         goto error_sysfs;
1615         }
1616
1617         retval = device_create_file(&acer_platform_device->dev,
1618                 &dev_attr_interface);
1619         if (retval)
1620                 goto error_sysfs;
1621
1622         return 0;
1623
1624 error_sysfs:
1625                 remove_sysfs(acer_platform_device);
1626         return retval;
1627 }
1628
1629 static void remove_debugfs(void)
1630 {
1631         debugfs_remove(interface->debug.devices);
1632         debugfs_remove(interface->debug.root);
1633 }
1634
1635 static int create_debugfs(void)
1636 {
1637         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1638         if (!interface->debug.root) {
1639                 printk(ACER_ERR "Failed to create debugfs directory");
1640                 return -ENOMEM;
1641         }
1642
1643         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1644                                         interface->debug.root,
1645                                         &interface->debug.wmid_devices);
1646         if (!interface->debug.devices)
1647                 goto error_debugfs;
1648
1649         return 0;
1650
1651 error_debugfs:
1652         remove_debugfs();
1653         return -ENOMEM;
1654 }
1655
1656 static int __init acer_wmi_init(void)
1657 {
1658         int err;
1659
1660         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1661
1662         if (dmi_check_system(acer_blacklist)) {
1663                 printk(ACER_INFO "Blacklisted hardware detected - "
1664                                 "not loading\n");
1665                 return -ENODEV;
1666         }
1667
1668         find_quirks();
1669
1670         /*
1671          * Detect which ACPI-WMI interface we're using.
1672          */
1673         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1674                 interface = &AMW0_V2_interface;
1675
1676         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1677                 interface = &wmid_interface;
1678
1679         if (wmi_has_guid(WMID_GUID2) && interface) {
1680                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1681                         printk(ACER_ERR "Unable to detect available WMID "
1682                                         "devices\n");
1683                         return -ENODEV;
1684                 }
1685         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1686                 printk(ACER_ERR "No WMID device detection method found\n");
1687                 return -ENODEV;
1688         }
1689
1690         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1691                 interface = &AMW0_interface;
1692
1693                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1694                         printk(ACER_ERR "Unable to detect available AMW0 "
1695                                         "devices\n");
1696                         return -ENODEV;
1697                 }
1698         }
1699
1700         if (wmi_has_guid(AMW0_GUID1))
1701                 AMW0_find_mailled();
1702
1703         if (!interface) {
1704                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1705                                 "load\n");
1706                 return -ENODEV;
1707         }
1708
1709         set_quirks();
1710
1711         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1712                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1713                 printk(ACER_INFO "Brightness must be controlled by "
1714                        "generic video driver\n");
1715         }
1716
1717         if (wmi_has_guid(WMID_GUID3)) {
1718                 if (ec_raw_mode) {
1719                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1720                                 printk(ACER_ERR "Cannot enable EC raw mode\n");
1721                                 return -ENODEV;
1722                         }
1723                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1724                         printk(ACER_ERR "Cannot enable Launch Manager mode\n");
1725                         return -ENODEV;
1726                 }
1727         } else if (ec_raw_mode) {
1728                 printk(ACER_INFO "No WMID EC raw mode enable method\n");
1729         }
1730
1731         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1732                 err = acer_wmi_input_setup();
1733                 if (err)
1734                         return err;
1735         }
1736
1737         err = platform_driver_register(&acer_platform_driver);
1738         if (err) {
1739                 printk(ACER_ERR "Unable to register platform driver.\n");
1740                 goto error_platform_register;
1741         }
1742
1743         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1744         if (!acer_platform_device) {
1745                 err = -ENOMEM;
1746                 goto error_device_alloc;
1747         }
1748
1749         err = platform_device_add(acer_platform_device);
1750         if (err)
1751                 goto error_device_add;
1752
1753         err = create_sysfs();
1754         if (err)
1755                 goto error_create_sys;
1756
1757         if (wmi_has_guid(WMID_GUID2)) {
1758                 interface->debug.wmid_devices = get_wmid_devices();
1759                 err = create_debugfs();
1760                 if (err)
1761                         goto error_create_debugfs;
1762         }
1763
1764         /* Override any initial settings with values from the commandline */
1765         acer_commandline_init();
1766
1767         return 0;
1768
1769 error_create_debugfs:
1770         remove_sysfs(acer_platform_device);
1771 error_create_sys:
1772         platform_device_del(acer_platform_device);
1773 error_device_add:
1774         platform_device_put(acer_platform_device);
1775 error_device_alloc:
1776         platform_driver_unregister(&acer_platform_driver);
1777 error_platform_register:
1778         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1779                 acer_wmi_input_destroy();
1780
1781         return err;
1782 }
1783
1784 static void __exit acer_wmi_exit(void)
1785 {
1786         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1787                 acer_wmi_input_destroy();
1788
1789         remove_sysfs(acer_platform_device);
1790         remove_debugfs();
1791         platform_device_unregister(acer_platform_device);
1792         platform_driver_unregister(&acer_platform_driver);
1793
1794         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1795         return;
1796 }
1797
1798 module_init(acer_wmi_init);
1799 module_exit(acer_wmi_exit);