e1c4938b301bbcdacbcc1303e9b8cde5bf288585
[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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/dmi.h>
32 #include <linux/fb.h>
33 #include <linux/backlight.h>
34 #include <linux/leds.h>
35 #include <linux/platform_device.h>
36 #include <linux/acpi.h>
37 #include <linux/i8042.h>
38 #include <linux/rfkill.h>
39 #include <linux/workqueue.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <linux/input.h>
43 #include <linux/input/sparse-keymap.h>
44
45 #include <acpi/acpi_drivers.h>
46
47 MODULE_AUTHOR("Carlos Corbacho");
48 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
49 MODULE_LICENSE("GPL");
50
51 /*
52  * Magic Number
53  * Meaning is unknown - this number is required for writing to ACPI for AMW0
54  * (it's also used in acerhk when directly accessing the BIOS)
55  */
56 #define ACER_AMW0_WRITE 0x9610
57
58 /*
59  * Bit masks for the AMW0 interface
60  */
61 #define ACER_AMW0_WIRELESS_MASK  0x35
62 #define ACER_AMW0_BLUETOOTH_MASK 0x34
63 #define ACER_AMW0_MAILLED_MASK   0x31
64
65 /*
66  * Method IDs for WMID interface
67  */
68 #define ACER_WMID_GET_WIRELESS_METHODID         1
69 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
70 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
71 #define ACER_WMID_SET_WIRELESS_METHODID         4
72 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
73 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
74 #define ACER_WMID_GET_THREEG_METHODID           10
75 #define ACER_WMID_SET_THREEG_METHODID           11
76
77 /*
78  * Acer ACPI method GUIDs
79  */
80 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
81 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
82 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
83 #define WMID_GUID2              "95764E09-FB56-4E83-B31A-37761F60994A"
84 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
85
86 /*
87  * Acer ACPI event GUIDs
88  */
89 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
90
91 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
92 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
93 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
94
95 enum acer_wmi_event_ids {
96         WMID_HOTKEY_EVENT = 0x1,
97 };
98
99 static const struct key_entry acer_wmi_keymap[] = {
100         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
101         {KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
102         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
103         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
104         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
105         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
106         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
107         {KE_IGNORE, 0x41, {KEY_MUTE} },
108         {KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
109         {KE_IGNORE, 0x43, {KEY_NEXTSONG} },
110         {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
111         {KE_IGNORE, 0x45, {KEY_STOP} },
112         {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
113         {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
114         {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
115         {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
116         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
117         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
118         {KE_IGNORE, 0x81, {KEY_SLEEP} },
119         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
120         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
121         {KE_END, 0}
122 };
123
124 static struct input_dev *acer_wmi_input_dev;
125
126 struct event_return_value {
127         u8 function;
128         u8 key_num;
129         u16 device_state;
130         u32 reserved;
131 } __attribute__((packed));
132
133 /*
134  * GUID3 Get Device Status device flags
135  */
136 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
137 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
138 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
139 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
140
141 struct lm_input_params {
142         u8 function_num;        /* Function Number */
143         u16 commun_devices;     /* Communication type devices default status */
144         u16 devices;            /* Other type devices default status */
145         u8 lm_status;           /* Launch Manager Status */
146         u16 reserved;
147 } __attribute__((packed));
148
149 struct lm_return_value {
150         u8 error_code;          /* Error Code */
151         u8 ec_return_value;     /* EC Return Value */
152         u16 reserved;
153 } __attribute__((packed));
154
155 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
156         u8 function_num;        /* Function Number */
157         u8 hotkey_number;       /* Hotkey Number */
158         u16 devices;            /* Get Device */
159 } __attribute__((packed));
160
161 struct wmid3_gds_return_value { /* Get Device Status return value*/
162         u8 error_code;          /* Error Code */
163         u8 ec_return_value;     /* EC Return Value */
164         u16 devices;            /* Current Device Status */
165         u32 reserved;
166 } __attribute__((packed));
167
168 struct hotkey_function_type_aa {
169         u8 type;
170         u8 length;
171         u16 handle;
172         u16 commun_func_bitmap;
173 } __attribute__((packed));
174
175 /*
176  * Interface capability flags
177  */
178 #define ACER_CAP_MAILLED                (1<<0)
179 #define ACER_CAP_WIRELESS               (1<<1)
180 #define ACER_CAP_BLUETOOTH              (1<<2)
181 #define ACER_CAP_BRIGHTNESS             (1<<3)
182 #define ACER_CAP_THREEG                 (1<<4)
183 #define ACER_CAP_ANY                    (0xFFFFFFFF)
184
185 /*
186  * Interface type flags
187  */
188 enum interface_flags {
189         ACER_AMW0,
190         ACER_AMW0_V2,
191         ACER_WMID,
192 };
193
194 #define ACER_DEFAULT_WIRELESS  0
195 #define ACER_DEFAULT_BLUETOOTH 0
196 #define ACER_DEFAULT_MAILLED   0
197 #define ACER_DEFAULT_THREEG    0
198
199 static int max_brightness = 0xF;
200
201 static int mailled = -1;
202 static int brightness = -1;
203 static int threeg = -1;
204 static int force_series;
205 static bool ec_raw_mode;
206 static bool has_type_aa;
207
208 module_param(mailled, int, 0444);
209 module_param(brightness, int, 0444);
210 module_param(threeg, int, 0444);
211 module_param(force_series, int, 0444);
212 module_param(ec_raw_mode, bool, 0444);
213 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
214 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
215 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
216 MODULE_PARM_DESC(force_series, "Force a different laptop series");
217 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
218
219 struct acer_data {
220         int mailled;
221         int threeg;
222         int brightness;
223 };
224
225 struct acer_debug {
226         struct dentry *root;
227         struct dentry *devices;
228         u32 wmid_devices;
229 };
230
231 static struct rfkill *wireless_rfkill;
232 static struct rfkill *bluetooth_rfkill;
233 static struct rfkill *threeg_rfkill;
234 static bool rfkill_inited;
235
236 /* Each low-level interface must define at least some of the following */
237 struct wmi_interface {
238         /* The WMI device type */
239         u32 type;
240
241         /* The capabilities this interface provides */
242         u32 capability;
243
244         /* Private data for the current interface */
245         struct acer_data data;
246
247         /* debugfs entries associated with this interface */
248         struct acer_debug debug;
249 };
250
251 /* The static interface pointer, points to the currently detected interface */
252 static struct wmi_interface *interface;
253
254 /*
255  * Embedded Controller quirks
256  * Some laptops require us to directly access the EC to either enable or query
257  * features that are not available through WMI.
258  */
259
260 struct quirk_entry {
261         u8 wireless;
262         u8 mailled;
263         s8 brightness;
264         u8 bluetooth;
265 };
266
267 static struct quirk_entry *quirks;
268
269 static void set_quirks(void)
270 {
271         if (!interface)
272                 return;
273
274         if (quirks->mailled)
275                 interface->capability |= ACER_CAP_MAILLED;
276
277         if (quirks->brightness)
278                 interface->capability |= ACER_CAP_BRIGHTNESS;
279 }
280
281 static int dmi_matched(const struct dmi_system_id *dmi)
282 {
283         quirks = dmi->driver_data;
284         return 1;
285 }
286
287 static struct quirk_entry quirk_unknown = {
288 };
289
290 static struct quirk_entry quirk_acer_aspire_1520 = {
291         .brightness = -1,
292 };
293
294 static struct quirk_entry quirk_acer_travelmate_2490 = {
295         .mailled = 1,
296 };
297
298 /* This AMW0 laptop has no bluetooth */
299 static struct quirk_entry quirk_medion_md_98300 = {
300         .wireless = 1,
301 };
302
303 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
304         .wireless = 2,
305 };
306
307 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
308 static struct dmi_system_id __devinitdata acer_blacklist[] = {
309         {
310                 .ident = "Acer Aspire One (SSD)",
311                 .matches = {
312                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
313                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
314                 },
315         },
316         {
317                 .ident = "Acer Aspire One (HDD)",
318                 .matches = {
319                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
320                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
321                 },
322         },
323         {}
324 };
325
326 static struct dmi_system_id acer_quirks[] = {
327         {
328                 .callback = dmi_matched,
329                 .ident = "Acer Aspire 1360",
330                 .matches = {
331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
333                 },
334                 .driver_data = &quirk_acer_aspire_1520,
335         },
336         {
337                 .callback = dmi_matched,
338                 .ident = "Acer Aspire 1520",
339                 .matches = {
340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
341                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
342                 },
343                 .driver_data = &quirk_acer_aspire_1520,
344         },
345         {
346                 .callback = dmi_matched,
347                 .ident = "Acer Aspire 3100",
348                 .matches = {
349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
350                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
351                 },
352                 .driver_data = &quirk_acer_travelmate_2490,
353         },
354         {
355                 .callback = dmi_matched,
356                 .ident = "Acer Aspire 3610",
357                 .matches = {
358                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
359                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
360                 },
361                 .driver_data = &quirk_acer_travelmate_2490,
362         },
363         {
364                 .callback = dmi_matched,
365                 .ident = "Acer Aspire 5100",
366                 .matches = {
367                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
368                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
369                 },
370                 .driver_data = &quirk_acer_travelmate_2490,
371         },
372         {
373                 .callback = dmi_matched,
374                 .ident = "Acer Aspire 5610",
375                 .matches = {
376                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
377                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
378                 },
379                 .driver_data = &quirk_acer_travelmate_2490,
380         },
381         {
382                 .callback = dmi_matched,
383                 .ident = "Acer Aspire 5630",
384                 .matches = {
385                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
386                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
387                 },
388                 .driver_data = &quirk_acer_travelmate_2490,
389         },
390         {
391                 .callback = dmi_matched,
392                 .ident = "Acer Aspire 5650",
393                 .matches = {
394                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
395                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
396                 },
397                 .driver_data = &quirk_acer_travelmate_2490,
398         },
399         {
400                 .callback = dmi_matched,
401                 .ident = "Acer Aspire 5680",
402                 .matches = {
403                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
404                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
405                 },
406                 .driver_data = &quirk_acer_travelmate_2490,
407         },
408         {
409                 .callback = dmi_matched,
410                 .ident = "Acer Aspire 9110",
411                 .matches = {
412                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
413                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
414                 },
415                 .driver_data = &quirk_acer_travelmate_2490,
416         },
417         {
418                 .callback = dmi_matched,
419                 .ident = "Acer TravelMate 2490",
420                 .matches = {
421                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
422                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
423                 },
424                 .driver_data = &quirk_acer_travelmate_2490,
425         },
426         {
427                 .callback = dmi_matched,
428                 .ident = "Acer TravelMate 4200",
429                 .matches = {
430                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
431                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
432                 },
433                 .driver_data = &quirk_acer_travelmate_2490,
434         },
435         {
436                 .callback = dmi_matched,
437                 .ident = "Fujitsu Siemens Amilo Li 1718",
438                 .matches = {
439                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
440                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
441                 },
442                 .driver_data = &quirk_fujitsu_amilo_li_1718,
443         },
444         {
445                 .callback = dmi_matched,
446                 .ident = "Medion MD 98300",
447                 .matches = {
448                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
449                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
450                 },
451                 .driver_data = &quirk_medion_md_98300,
452         },
453         {}
454 };
455
456 /* Find which quirks are needed for a particular vendor/ model pair */
457 static void find_quirks(void)
458 {
459         if (!force_series) {
460                 dmi_check_system(acer_quirks);
461         } else if (force_series == 2490) {
462                 quirks = &quirk_acer_travelmate_2490;
463         }
464
465         if (quirks == NULL)
466                 quirks = &quirk_unknown;
467
468         set_quirks();
469 }
470
471 /*
472  * General interface convenience methods
473  */
474
475 static bool has_cap(u32 cap)
476 {
477         if ((interface->capability & cap) != 0)
478                 return 1;
479
480         return 0;
481 }
482
483 /*
484  * AMW0 (V1) interface
485  */
486 struct wmab_args {
487         u32 eax;
488         u32 ebx;
489         u32 ecx;
490         u32 edx;
491 };
492
493 struct wmab_ret {
494         u32 eax;
495         u32 ebx;
496         u32 ecx;
497         u32 edx;
498         u32 eex;
499 };
500
501 static acpi_status wmab_execute(struct wmab_args *regbuf,
502 struct acpi_buffer *result)
503 {
504         struct acpi_buffer input;
505         acpi_status status;
506         input.length = sizeof(struct wmab_args);
507         input.pointer = (u8 *)regbuf;
508
509         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
510
511         return status;
512 }
513
514 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
515 struct wmi_interface *iface)
516 {
517         int err;
518         u8 result;
519
520         switch (cap) {
521         case ACER_CAP_MAILLED:
522                 switch (quirks->mailled) {
523                 default:
524                         err = ec_read(0xA, &result);
525                         if (err)
526                                 return AE_ERROR;
527                         *value = (result >> 7) & 0x1;
528                         return AE_OK;
529                 }
530                 break;
531         case ACER_CAP_WIRELESS:
532                 switch (quirks->wireless) {
533                 case 1:
534                         err = ec_read(0x7B, &result);
535                         if (err)
536                                 return AE_ERROR;
537                         *value = result & 0x1;
538                         return AE_OK;
539                 case 2:
540                         err = ec_read(0x71, &result);
541                         if (err)
542                                 return AE_ERROR;
543                         *value = result & 0x1;
544                         return AE_OK;
545                 default:
546                         err = ec_read(0xA, &result);
547                         if (err)
548                                 return AE_ERROR;
549                         *value = (result >> 2) & 0x1;
550                         return AE_OK;
551                 }
552                 break;
553         case ACER_CAP_BLUETOOTH:
554                 switch (quirks->bluetooth) {
555                 default:
556                         err = ec_read(0xA, &result);
557                         if (err)
558                                 return AE_ERROR;
559                         *value = (result >> 4) & 0x1;
560                         return AE_OK;
561                 }
562                 break;
563         case ACER_CAP_BRIGHTNESS:
564                 switch (quirks->brightness) {
565                 default:
566                         err = ec_read(0x83, &result);
567                         if (err)
568                                 return AE_ERROR;
569                         *value = result;
570                         return AE_OK;
571                 }
572                 break;
573         default:
574                 return AE_ERROR;
575         }
576         return AE_OK;
577 }
578
579 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
580 {
581         struct wmab_args args;
582
583         args.eax = ACER_AMW0_WRITE;
584         args.ebx = value ? (1<<8) : 0;
585         args.ecx = args.edx = 0;
586
587         switch (cap) {
588         case ACER_CAP_MAILLED:
589                 if (value > 1)
590                         return AE_BAD_PARAMETER;
591                 args.ebx |= ACER_AMW0_MAILLED_MASK;
592                 break;
593         case ACER_CAP_WIRELESS:
594                 if (value > 1)
595                         return AE_BAD_PARAMETER;
596                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
597                 break;
598         case ACER_CAP_BLUETOOTH:
599                 if (value > 1)
600                         return AE_BAD_PARAMETER;
601                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
602                 break;
603         case ACER_CAP_BRIGHTNESS:
604                 if (value > max_brightness)
605                         return AE_BAD_PARAMETER;
606                 switch (quirks->brightness) {
607                 default:
608                         return ec_write(0x83, value);
609                         break;
610                 }
611         default:
612                 return AE_ERROR;
613         }
614
615         /* Actually do the set */
616         return wmab_execute(&args, NULL);
617 }
618
619 static acpi_status AMW0_find_mailled(void)
620 {
621         struct wmab_args args;
622         struct wmab_ret ret;
623         acpi_status status = AE_OK;
624         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
625         union acpi_object *obj;
626
627         args.eax = 0x86;
628         args.ebx = args.ecx = args.edx = 0;
629
630         status = wmab_execute(&args, &out);
631         if (ACPI_FAILURE(status))
632                 return status;
633
634         obj = (union acpi_object *) out.pointer;
635         if (obj && obj->type == ACPI_TYPE_BUFFER &&
636         obj->buffer.length == sizeof(struct wmab_ret)) {
637                 ret = *((struct wmab_ret *) obj->buffer.pointer);
638         } else {
639                 kfree(out.pointer);
640                 return AE_ERROR;
641         }
642
643         if (ret.eex & 0x1)
644                 interface->capability |= ACER_CAP_MAILLED;
645
646         kfree(out.pointer);
647
648         return AE_OK;
649 }
650
651 static acpi_status AMW0_set_capabilities(void)
652 {
653         struct wmab_args args;
654         struct wmab_ret ret;
655         acpi_status status;
656         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
657         union acpi_object *obj;
658
659         /*
660          * On laptops with this strange GUID (non Acer), normal probing doesn't
661          * work.
662          */
663         if (wmi_has_guid(AMW0_GUID2)) {
664                 interface->capability |= ACER_CAP_WIRELESS;
665                 return AE_OK;
666         }
667
668         args.eax = ACER_AMW0_WRITE;
669         args.ecx = args.edx = 0;
670
671         args.ebx = 0xa2 << 8;
672         args.ebx |= ACER_AMW0_WIRELESS_MASK;
673
674         status = wmab_execute(&args, &out);
675         if (ACPI_FAILURE(status))
676                 return status;
677
678         obj = out.pointer;
679         if (obj && obj->type == ACPI_TYPE_BUFFER &&
680         obj->buffer.length == sizeof(struct wmab_ret)) {
681                 ret = *((struct wmab_ret *) obj->buffer.pointer);
682         } else {
683                 status = AE_ERROR;
684                 goto out;
685         }
686
687         if (ret.eax & 0x1)
688                 interface->capability |= ACER_CAP_WIRELESS;
689
690         args.ebx = 2 << 8;
691         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
692
693         /*
694          * It's ok to use existing buffer for next wmab_execute call.
695          * But we need to kfree(out.pointer) if next wmab_execute fail.
696          */
697         status = wmab_execute(&args, &out);
698         if (ACPI_FAILURE(status))
699                 goto out;
700
701         obj = (union acpi_object *) out.pointer;
702         if (obj && obj->type == ACPI_TYPE_BUFFER
703         && obj->buffer.length == sizeof(struct wmab_ret)) {
704                 ret = *((struct wmab_ret *) obj->buffer.pointer);
705         } else {
706                 status = AE_ERROR;
707                 goto out;
708         }
709
710         if (ret.eax & 0x1)
711                 interface->capability |= ACER_CAP_BLUETOOTH;
712
713         /*
714          * This appears to be safe to enable, since all Wistron based laptops
715          * appear to use the same EC register for brightness, even if they
716          * differ for wireless, etc
717          */
718         if (quirks->brightness >= 0)
719                 interface->capability |= ACER_CAP_BRIGHTNESS;
720
721         status = AE_OK;
722 out:
723         kfree(out.pointer);
724         return status;
725 }
726
727 static struct wmi_interface AMW0_interface = {
728         .type = ACER_AMW0,
729 };
730
731 static struct wmi_interface AMW0_V2_interface = {
732         .type = ACER_AMW0_V2,
733 };
734
735 /*
736  * New interface (The WMID interface)
737  */
738 static acpi_status
739 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
740 {
741         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
742         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
743         union acpi_object *obj;
744         u32 tmp;
745         acpi_status status;
746
747         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
748
749         if (ACPI_FAILURE(status))
750                 return status;
751
752         obj = (union acpi_object *) result.pointer;
753         if (obj && obj->type == ACPI_TYPE_BUFFER &&
754                 (obj->buffer.length == sizeof(u32) ||
755                 obj->buffer.length == sizeof(u64))) {
756                 tmp = *((u32 *) obj->buffer.pointer);
757         } else if (obj->type == ACPI_TYPE_INTEGER) {
758                 tmp = (u32) obj->integer.value;
759         } else {
760                 tmp = 0;
761         }
762
763         if (out)
764                 *out = tmp;
765
766         kfree(result.pointer);
767
768         return status;
769 }
770
771 static acpi_status WMID_get_u32(u32 *value, u32 cap,
772 struct wmi_interface *iface)
773 {
774         acpi_status status;
775         u8 tmp;
776         u32 result, method_id = 0;
777
778         switch (cap) {
779         case ACER_CAP_WIRELESS:
780                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
781                 break;
782         case ACER_CAP_BLUETOOTH:
783                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
784                 break;
785         case ACER_CAP_BRIGHTNESS:
786                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
787                 break;
788         case ACER_CAP_THREEG:
789                 method_id = ACER_WMID_GET_THREEG_METHODID;
790                 break;
791         case ACER_CAP_MAILLED:
792                 if (quirks->mailled == 1) {
793                         ec_read(0x9f, &tmp);
794                         *value = tmp & 0x1;
795                         return 0;
796                 }
797         default:
798                 return AE_ERROR;
799         }
800         status = WMI_execute_u32(method_id, 0, &result);
801
802         if (ACPI_SUCCESS(status))
803                 *value = (u8)result;
804
805         return status;
806 }
807
808 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
809 {
810         u32 method_id = 0;
811         char param;
812
813         switch (cap) {
814         case ACER_CAP_BRIGHTNESS:
815                 if (value > max_brightness)
816                         return AE_BAD_PARAMETER;
817                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
818                 break;
819         case ACER_CAP_WIRELESS:
820                 if (value > 1)
821                         return AE_BAD_PARAMETER;
822                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
823                 break;
824         case ACER_CAP_BLUETOOTH:
825                 if (value > 1)
826                         return AE_BAD_PARAMETER;
827                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
828                 break;
829         case ACER_CAP_THREEG:
830                 if (value > 1)
831                         return AE_BAD_PARAMETER;
832                 method_id = ACER_WMID_SET_THREEG_METHODID;
833                 break;
834         case ACER_CAP_MAILLED:
835                 if (value > 1)
836                         return AE_BAD_PARAMETER;
837                 if (quirks->mailled == 1) {
838                         param = value ? 0x92 : 0x93;
839                         i8042_lock_chip();
840                         i8042_command(&param, 0x1059);
841                         i8042_unlock_chip();
842                         return 0;
843                 }
844                 break;
845         default:
846                 return AE_ERROR;
847         }
848         return WMI_execute_u32(method_id, (u32)value, NULL);
849 }
850
851 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
852 {
853         struct hotkey_function_type_aa *type_aa;
854
855         /* We are looking for OEM-specific Type AAh */
856         if (header->type != 0xAA)
857                 return;
858
859         has_type_aa = true;
860         type_aa = (struct hotkey_function_type_aa *) header;
861
862         pr_info("Function bitmap for Communication Button: 0x%x\n",
863                 type_aa->commun_func_bitmap);
864
865         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
866                 interface->capability |= ACER_CAP_WIRELESS;
867         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
868                 interface->capability |= ACER_CAP_THREEG;
869         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
870                 interface->capability |= ACER_CAP_BLUETOOTH;
871 }
872
873 static acpi_status WMID_set_capabilities(void)
874 {
875         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
876         union acpi_object *obj;
877         acpi_status status;
878         u32 devices;
879
880         status = wmi_query_block(WMID_GUID2, 1, &out);
881         if (ACPI_FAILURE(status))
882                 return status;
883
884         obj = (union acpi_object *) out.pointer;
885         if (obj && obj->type == ACPI_TYPE_BUFFER &&
886                 (obj->buffer.length == sizeof(u32) ||
887                 obj->buffer.length == sizeof(u64))) {
888                 devices = *((u32 *) obj->buffer.pointer);
889         } else if (obj->type == ACPI_TYPE_INTEGER) {
890                 devices = (u32) obj->integer.value;
891         } else {
892                 kfree(out.pointer);
893                 return AE_ERROR;
894         }
895
896         dmi_walk(type_aa_dmi_decode, NULL);
897         if (!has_type_aa) {
898                 interface->capability |= ACER_CAP_WIRELESS;
899                 if (devices & 0x40)
900                         interface->capability |= ACER_CAP_THREEG;
901                 if (devices & 0x10)
902                         interface->capability |= ACER_CAP_BLUETOOTH;
903         }
904
905         /* WMID always provides brightness methods */
906         interface->capability |= ACER_CAP_BRIGHTNESS;
907
908         if (!(devices & 0x20))
909                 max_brightness = 0x9;
910
911         kfree(out.pointer);
912         return status;
913 }
914
915 static struct wmi_interface wmid_interface = {
916         .type = ACER_WMID,
917 };
918
919 /*
920  * Generic Device (interface-independent)
921  */
922
923 static acpi_status get_u32(u32 *value, u32 cap)
924 {
925         acpi_status status = AE_ERROR;
926
927         switch (interface->type) {
928         case ACER_AMW0:
929                 status = AMW0_get_u32(value, cap, interface);
930                 break;
931         case ACER_AMW0_V2:
932                 if (cap == ACER_CAP_MAILLED) {
933                         status = AMW0_get_u32(value, cap, interface);
934                         break;
935                 }
936         case ACER_WMID:
937                 status = WMID_get_u32(value, cap, interface);
938                 break;
939         }
940
941         return status;
942 }
943
944 static acpi_status set_u32(u32 value, u32 cap)
945 {
946         acpi_status status;
947
948         if (interface->capability & cap) {
949                 switch (interface->type) {
950                 case ACER_AMW0:
951                         return AMW0_set_u32(value, cap, interface);
952                 case ACER_AMW0_V2:
953                         if (cap == ACER_CAP_MAILLED)
954                                 return AMW0_set_u32(value, cap, interface);
955
956                         /*
957                          * On some models, some WMID methods don't toggle
958                          * properly. For those cases, we want to run the AMW0
959                          * method afterwards to be certain we've really toggled
960                          * the device state.
961                          */
962                         if (cap == ACER_CAP_WIRELESS ||
963                                 cap == ACER_CAP_BLUETOOTH) {
964                                 status = WMID_set_u32(value, cap, interface);
965                                 if (ACPI_FAILURE(status))
966                                         return status;
967
968                                 return AMW0_set_u32(value, cap, interface);
969                         }
970                 case ACER_WMID:
971                         return WMID_set_u32(value, cap, interface);
972                 default:
973                         return AE_BAD_PARAMETER;
974                 }
975         }
976         return AE_BAD_PARAMETER;
977 }
978
979 static void __init acer_commandline_init(void)
980 {
981         /*
982          * These will all fail silently if the value given is invalid, or the
983          * capability isn't available on the given interface
984          */
985         if (mailled >= 0)
986                 set_u32(mailled, ACER_CAP_MAILLED);
987         if (!has_type_aa && threeg >= 0)
988                 set_u32(threeg, ACER_CAP_THREEG);
989         if (brightness >= 0)
990                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
991 }
992
993 /*
994  * LED device (Mail LED only, no other LEDs known yet)
995  */
996 static void mail_led_set(struct led_classdev *led_cdev,
997 enum led_brightness value)
998 {
999         set_u32(value, ACER_CAP_MAILLED);
1000 }
1001
1002 static struct led_classdev mail_led = {
1003         .name = "acer-wmi::mail",
1004         .brightness_set = mail_led_set,
1005 };
1006
1007 static int __devinit acer_led_init(struct device *dev)
1008 {
1009         return led_classdev_register(dev, &mail_led);
1010 }
1011
1012 static void acer_led_exit(void)
1013 {
1014         set_u32(LED_OFF, ACER_CAP_MAILLED);
1015         led_classdev_unregister(&mail_led);
1016 }
1017
1018 /*
1019  * Backlight device
1020  */
1021 static struct backlight_device *acer_backlight_device;
1022
1023 static int read_brightness(struct backlight_device *bd)
1024 {
1025         u32 value;
1026         get_u32(&value, ACER_CAP_BRIGHTNESS);
1027         return value;
1028 }
1029
1030 static int update_bl_status(struct backlight_device *bd)
1031 {
1032         int intensity = bd->props.brightness;
1033
1034         if (bd->props.power != FB_BLANK_UNBLANK)
1035                 intensity = 0;
1036         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1037                 intensity = 0;
1038
1039         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1040
1041         return 0;
1042 }
1043
1044 static const struct backlight_ops acer_bl_ops = {
1045         .get_brightness = read_brightness,
1046         .update_status = update_bl_status,
1047 };
1048
1049 static int __devinit acer_backlight_init(struct device *dev)
1050 {
1051         struct backlight_properties props;
1052         struct backlight_device *bd;
1053
1054         memset(&props, 0, sizeof(struct backlight_properties));
1055         props.type = BACKLIGHT_PLATFORM;
1056         props.max_brightness = max_brightness;
1057         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1058                                        &props);
1059         if (IS_ERR(bd)) {
1060                 pr_err("Could not register Acer backlight device\n");
1061                 acer_backlight_device = NULL;
1062                 return PTR_ERR(bd);
1063         }
1064
1065         acer_backlight_device = bd;
1066
1067         bd->props.power = FB_BLANK_UNBLANK;
1068         bd->props.brightness = read_brightness(bd);
1069         backlight_update_status(bd);
1070         return 0;
1071 }
1072
1073 static void acer_backlight_exit(void)
1074 {
1075         backlight_device_unregister(acer_backlight_device);
1076 }
1077
1078 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1079 {
1080         struct wmid3_gds_return_value return_value;
1081         acpi_status status;
1082         union acpi_object *obj;
1083         struct wmid3_gds_input_param params = {
1084                 .function_num = 0x1,
1085                 .hotkey_number = 0x01,
1086                 .devices = device,
1087         };
1088         struct acpi_buffer input = {
1089                 sizeof(struct wmid3_gds_input_param),
1090                 &params
1091         };
1092         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1093
1094         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1095         if (ACPI_FAILURE(status))
1096                 return status;
1097
1098         obj = output.pointer;
1099
1100         if (!obj)
1101                 return AE_ERROR;
1102         else if (obj->type != ACPI_TYPE_BUFFER) {
1103                 kfree(obj);
1104                 return AE_ERROR;
1105         }
1106         if (obj->buffer.length != 8) {
1107                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1108                 kfree(obj);
1109                 return AE_ERROR;
1110         }
1111
1112         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1113         kfree(obj);
1114
1115         if (return_value.error_code || return_value.ec_return_value)
1116                 pr_warn("Get Device Status failed: 0x%x - 0x%x\n",
1117                         return_value.error_code,
1118                         return_value.ec_return_value);
1119         else
1120                 *value = !!(return_value.devices & device);
1121
1122         return status;
1123 }
1124
1125 static acpi_status get_device_status(u32 *value, u32 cap)
1126 {
1127         if (wmi_has_guid(WMID_GUID3)) {
1128                 u16 device;
1129
1130                 switch (cap) {
1131                 case ACER_CAP_WIRELESS:
1132                         device = ACER_WMID3_GDS_WIRELESS;
1133                         break;
1134                 case ACER_CAP_BLUETOOTH:
1135                         device = ACER_WMID3_GDS_BLUETOOTH;
1136                         break;
1137                 case ACER_CAP_THREEG:
1138                         device = ACER_WMID3_GDS_THREEG;
1139                         break;
1140                 default:
1141                         return AE_ERROR;
1142                 }
1143                 return wmid3_get_device_status(value, device);
1144
1145         } else {
1146                 return get_u32(value, cap);
1147         }
1148 }
1149
1150 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1151 {
1152         struct wmid3_gds_return_value return_value;
1153         acpi_status status;
1154         union acpi_object *obj;
1155         u16 devices;
1156         struct wmid3_gds_input_param params = {
1157                 .function_num = 0x1,
1158                 .hotkey_number = 0x01,
1159                 .devices = ACER_WMID3_GDS_WIRELESS |
1160                                 ACER_WMID3_GDS_THREEG |
1161                                 ACER_WMID3_GDS_WIMAX |
1162                                 ACER_WMID3_GDS_BLUETOOTH,
1163         };
1164         struct acpi_buffer input = {
1165                 sizeof(struct wmid3_gds_input_param),
1166                 &params
1167         };
1168         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1169         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1170
1171         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1172         if (ACPI_FAILURE(status))
1173                 return status;
1174
1175         obj = output.pointer;
1176
1177         if (!obj)
1178                 return AE_ERROR;
1179         else if (obj->type != ACPI_TYPE_BUFFER) {
1180                 kfree(obj);
1181                 return AE_ERROR;
1182         }
1183         if (obj->buffer.length != 8) {
1184                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1185                 kfree(obj);
1186                 return AE_ERROR;
1187         }
1188
1189         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1190         kfree(obj);
1191
1192         if (return_value.error_code || return_value.ec_return_value) {
1193                 pr_warning("Get Current Device Status failed: "
1194                         "0x%x - 0x%x\n", return_value.error_code,
1195                         return_value.ec_return_value);
1196                 return status;
1197         }
1198
1199         devices = return_value.devices;
1200         params.function_num = 0x2;
1201         params.hotkey_number = 0x01;
1202         params.devices = (value) ? (devices | device) : (devices & ~device);
1203
1204         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1205         if (ACPI_FAILURE(status))
1206                 return status;
1207
1208         obj = output2.pointer;
1209
1210         if (!obj)
1211                 return AE_ERROR;
1212         else if (obj->type != ACPI_TYPE_BUFFER) {
1213                 kfree(obj);
1214                 return AE_ERROR;
1215         }
1216         if (obj->buffer.length != 4) {
1217                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1218                 kfree(obj);
1219                 return AE_ERROR;
1220         }
1221
1222         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1223         kfree(obj);
1224
1225         if (return_value.error_code || return_value.ec_return_value)
1226                 pr_warning("Set Device Status failed: "
1227                         "0x%x - 0x%x\n", return_value.error_code,
1228                         return_value.ec_return_value);
1229
1230         return status;
1231 }
1232
1233 static acpi_status set_device_status(u32 value, u32 cap)
1234 {
1235         if (wmi_has_guid(WMID_GUID3)) {
1236                 u16 device;
1237
1238                 switch (cap) {
1239                 case ACER_CAP_WIRELESS:
1240                         device = ACER_WMID3_GDS_WIRELESS;
1241                         break;
1242                 case ACER_CAP_BLUETOOTH:
1243                         device = ACER_WMID3_GDS_BLUETOOTH;
1244                         break;
1245                 case ACER_CAP_THREEG:
1246                         device = ACER_WMID3_GDS_THREEG;
1247                         break;
1248                 default:
1249                         return AE_ERROR;
1250                 }
1251                 return wmid3_set_device_status(value, device);
1252
1253         } else {
1254                 return set_u32(value, cap);
1255         }
1256 }
1257
1258 /*
1259  * Rfkill devices
1260  */
1261 static void acer_rfkill_update(struct work_struct *ignored);
1262 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1263 static void acer_rfkill_update(struct work_struct *ignored)
1264 {
1265         u32 state;
1266         acpi_status status;
1267
1268         status = get_u32(&state, ACER_CAP_WIRELESS);
1269         if (ACPI_SUCCESS(status))
1270                 rfkill_set_sw_state(wireless_rfkill, !state);
1271
1272         if (has_cap(ACER_CAP_BLUETOOTH)) {
1273                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1274                 if (ACPI_SUCCESS(status))
1275                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1276         }
1277
1278         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1279                 status = wmid3_get_device_status(&state,
1280                                 ACER_WMID3_GDS_THREEG);
1281                 if (ACPI_SUCCESS(status))
1282                         rfkill_set_sw_state(threeg_rfkill, !state);
1283         }
1284
1285         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1286 }
1287
1288 static int acer_rfkill_set(void *data, bool blocked)
1289 {
1290         acpi_status status;
1291         u32 cap = (unsigned long)data;
1292
1293         if (rfkill_inited) {
1294                 status = set_device_status(!blocked, cap);
1295                 if (ACPI_FAILURE(status))
1296                         return -ENODEV;
1297         }
1298
1299         return 0;
1300 }
1301
1302 static const struct rfkill_ops acer_rfkill_ops = {
1303         .set_block = acer_rfkill_set,
1304 };
1305
1306 static struct rfkill *acer_rfkill_register(struct device *dev,
1307                                            enum rfkill_type type,
1308                                            char *name, u32 cap)
1309 {
1310         int err;
1311         struct rfkill *rfkill_dev;
1312         u32 state;
1313         acpi_status status;
1314
1315         rfkill_dev = rfkill_alloc(name, dev, type,
1316                                   &acer_rfkill_ops,
1317                                   (void *)(unsigned long)cap);
1318         if (!rfkill_dev)
1319                 return ERR_PTR(-ENOMEM);
1320
1321         status = get_device_status(&state, cap);
1322
1323         err = rfkill_register(rfkill_dev);
1324         if (err) {
1325                 rfkill_destroy(rfkill_dev);
1326                 return ERR_PTR(err);
1327         }
1328
1329         if (ACPI_SUCCESS(status))
1330                 rfkill_set_sw_state(rfkill_dev, !state);
1331
1332         return rfkill_dev;
1333 }
1334
1335 static int acer_rfkill_init(struct device *dev)
1336 {
1337         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1338                 "acer-wireless", ACER_CAP_WIRELESS);
1339         if (IS_ERR(wireless_rfkill))
1340                 return PTR_ERR(wireless_rfkill);
1341
1342         if (has_cap(ACER_CAP_BLUETOOTH)) {
1343                 bluetooth_rfkill = acer_rfkill_register(dev,
1344                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1345                         ACER_CAP_BLUETOOTH);
1346                 if (IS_ERR(bluetooth_rfkill)) {
1347                         rfkill_unregister(wireless_rfkill);
1348                         rfkill_destroy(wireless_rfkill);
1349                         return PTR_ERR(bluetooth_rfkill);
1350                 }
1351         }
1352
1353         if (has_cap(ACER_CAP_THREEG)) {
1354                 threeg_rfkill = acer_rfkill_register(dev,
1355                         RFKILL_TYPE_WWAN, "acer-threeg",
1356                         ACER_CAP_THREEG);
1357                 if (IS_ERR(threeg_rfkill)) {
1358                         rfkill_unregister(wireless_rfkill);
1359                         rfkill_destroy(wireless_rfkill);
1360                         rfkill_unregister(bluetooth_rfkill);
1361                         rfkill_destroy(bluetooth_rfkill);
1362                         return PTR_ERR(threeg_rfkill);
1363                 }
1364         }
1365
1366         rfkill_inited = true;
1367
1368         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1369                 schedule_delayed_work(&acer_rfkill_work,
1370                         round_jiffies_relative(HZ));
1371
1372         return 0;
1373 }
1374
1375 static void acer_rfkill_exit(void)
1376 {
1377         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1378                 cancel_delayed_work_sync(&acer_rfkill_work);
1379
1380         rfkill_unregister(wireless_rfkill);
1381         rfkill_destroy(wireless_rfkill);
1382
1383         if (has_cap(ACER_CAP_BLUETOOTH)) {
1384                 rfkill_unregister(bluetooth_rfkill);
1385                 rfkill_destroy(bluetooth_rfkill);
1386         }
1387
1388         if (has_cap(ACER_CAP_THREEG)) {
1389                 rfkill_unregister(threeg_rfkill);
1390                 rfkill_destroy(threeg_rfkill);
1391         }
1392         return;
1393 }
1394
1395 /*
1396  * sysfs interface
1397  */
1398 static ssize_t show_bool_threeg(struct device *dev,
1399         struct device_attribute *attr, char *buf)
1400 {
1401         u32 result; \
1402         acpi_status status;
1403         if (wmi_has_guid(WMID_GUID3))
1404                 status = wmid3_get_device_status(&result,
1405                                 ACER_WMID3_GDS_THREEG);
1406         else
1407                 status = get_u32(&result, ACER_CAP_THREEG);
1408         if (ACPI_SUCCESS(status))
1409                 return sprintf(buf, "%u\n", result);
1410         return sprintf(buf, "Read error\n");
1411 }
1412
1413 static ssize_t set_bool_threeg(struct device *dev,
1414         struct device_attribute *attr, const char *buf, size_t count)
1415 {
1416         u32 tmp = simple_strtoul(buf, NULL, 10);
1417         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1418                 if (ACPI_FAILURE(status))
1419                         return -EINVAL;
1420         return count;
1421 }
1422 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1423         set_bool_threeg);
1424
1425 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1426         char *buf)
1427 {
1428         switch (interface->type) {
1429         case ACER_AMW0:
1430                 return sprintf(buf, "AMW0\n");
1431         case ACER_AMW0_V2:
1432                 return sprintf(buf, "AMW0 v2\n");
1433         case ACER_WMID:
1434                 return sprintf(buf, "WMID\n");
1435         default:
1436                 return sprintf(buf, "Error!\n");
1437         }
1438 }
1439
1440 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1441
1442 static void acer_wmi_notify(u32 value, void *context)
1443 {
1444         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1445         union acpi_object *obj;
1446         struct event_return_value return_value;
1447         acpi_status status;
1448         u16 device_state;
1449         const struct key_entry *key;
1450
1451         status = wmi_get_event_data(value, &response);
1452         if (status != AE_OK) {
1453                 pr_warn("bad event status 0x%x\n", status);
1454                 return;
1455         }
1456
1457         obj = (union acpi_object *)response.pointer;
1458
1459         if (!obj)
1460                 return;
1461         if (obj->type != ACPI_TYPE_BUFFER) {
1462                 pr_warn("Unknown response received %d\n", obj->type);
1463                 kfree(obj);
1464                 return;
1465         }
1466         if (obj->buffer.length != 8) {
1467                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1468                 kfree(obj);
1469                 return;
1470         }
1471
1472         return_value = *((struct event_return_value *)obj->buffer.pointer);
1473         kfree(obj);
1474
1475         switch (return_value.function) {
1476         case WMID_HOTKEY_EVENT:
1477                 device_state = return_value.device_state;
1478                 pr_debug("device state: 0x%x\n", device_state);
1479
1480                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1481                                                         return_value.key_num);
1482                 if (!key) {
1483                         pr_warn("Unknown key number - 0x%x\n",
1484                                 return_value.key_num);
1485                 } else {
1486                         switch (key->keycode) {
1487                         case KEY_WLAN:
1488                         case KEY_BLUETOOTH:
1489                                 if (has_cap(ACER_CAP_WIRELESS))
1490                                         rfkill_set_sw_state(wireless_rfkill,
1491                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1492                                 if (has_cap(ACER_CAP_THREEG))
1493                                         rfkill_set_sw_state(threeg_rfkill,
1494                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1495                                 if (has_cap(ACER_CAP_BLUETOOTH))
1496                                         rfkill_set_sw_state(bluetooth_rfkill,
1497                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1498                                 break;
1499                         }
1500                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1501                                                    1, true);
1502                 }
1503                 break;
1504         default:
1505                 pr_warn("Unknown function number - %d - %d\n",
1506                         return_value.function, return_value.key_num);
1507                 break;
1508         }
1509 }
1510
1511 static acpi_status
1512 wmid3_set_lm_mode(struct lm_input_params *params,
1513                   struct lm_return_value *return_value)
1514 {
1515         acpi_status status;
1516         union acpi_object *obj;
1517
1518         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1519         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1520
1521         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1522         if (ACPI_FAILURE(status))
1523                 return status;
1524
1525         obj = output.pointer;
1526
1527         if (!obj)
1528                 return AE_ERROR;
1529         else if (obj->type != ACPI_TYPE_BUFFER) {
1530                 kfree(obj);
1531                 return AE_ERROR;
1532         }
1533         if (obj->buffer.length != 4) {
1534                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1535                 kfree(obj);
1536                 return AE_ERROR;
1537         }
1538
1539         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1540         kfree(obj);
1541
1542         return status;
1543 }
1544
1545 static int acer_wmi_enable_ec_raw(void)
1546 {
1547         struct lm_return_value return_value;
1548         acpi_status status;
1549         struct lm_input_params params = {
1550                 .function_num = 0x1,
1551                 .commun_devices = 0xFFFF,
1552                 .devices = 0xFFFF,
1553                 .lm_status = 0x00,            /* Launch Manager Deactive */
1554         };
1555
1556         status = wmid3_set_lm_mode(&params, &return_value);
1557
1558         if (return_value.error_code || return_value.ec_return_value)
1559                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1560                         return_value.error_code,
1561                         return_value.ec_return_value);
1562         else
1563                 pr_info("Enabled EC raw mode\n");
1564
1565         return status;
1566 }
1567
1568 static int acer_wmi_enable_lm(void)
1569 {
1570         struct lm_return_value return_value;
1571         acpi_status status;
1572         struct lm_input_params params = {
1573                 .function_num = 0x1,
1574                 .commun_devices = 0xFFFF,
1575                 .devices = 0xFFFF,
1576                 .lm_status = 0x01,            /* Launch Manager Active */
1577         };
1578
1579         status = wmid3_set_lm_mode(&params, &return_value);
1580
1581         if (return_value.error_code || return_value.ec_return_value)
1582                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1583                         return_value.error_code,
1584                         return_value.ec_return_value);
1585
1586         return status;
1587 }
1588
1589 static int __init acer_wmi_input_setup(void)
1590 {
1591         acpi_status status;
1592         int err;
1593
1594         acer_wmi_input_dev = input_allocate_device();
1595         if (!acer_wmi_input_dev)
1596                 return -ENOMEM;
1597
1598         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1599         acer_wmi_input_dev->phys = "wmi/input0";
1600         acer_wmi_input_dev->id.bustype = BUS_HOST;
1601
1602         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1603         if (err)
1604                 goto err_free_dev;
1605
1606         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1607                                                 acer_wmi_notify, NULL);
1608         if (ACPI_FAILURE(status)) {
1609                 err = -EIO;
1610                 goto err_free_keymap;
1611         }
1612
1613         err = input_register_device(acer_wmi_input_dev);
1614         if (err)
1615                 goto err_uninstall_notifier;
1616
1617         return 0;
1618
1619 err_uninstall_notifier:
1620         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1621 err_free_keymap:
1622         sparse_keymap_free(acer_wmi_input_dev);
1623 err_free_dev:
1624         input_free_device(acer_wmi_input_dev);
1625         return err;
1626 }
1627
1628 static void acer_wmi_input_destroy(void)
1629 {
1630         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1631         sparse_keymap_free(acer_wmi_input_dev);
1632         input_unregister_device(acer_wmi_input_dev);
1633 }
1634
1635 /*
1636  * debugfs functions
1637  */
1638 static u32 get_wmid_devices(void)
1639 {
1640         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1641         union acpi_object *obj;
1642         acpi_status status;
1643         u32 devices = 0;
1644
1645         status = wmi_query_block(WMID_GUID2, 1, &out);
1646         if (ACPI_FAILURE(status))
1647                 return 0;
1648
1649         obj = (union acpi_object *) out.pointer;
1650         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1651                 (obj->buffer.length == sizeof(u32) ||
1652                 obj->buffer.length == sizeof(u64))) {
1653                 devices = *((u32 *) obj->buffer.pointer);
1654         } else if (obj->type == ACPI_TYPE_INTEGER) {
1655                 devices = (u32) obj->integer.value;
1656         }
1657
1658         kfree(out.pointer);
1659         return devices;
1660 }
1661
1662 /*
1663  * Platform device
1664  */
1665 static int __devinit acer_platform_probe(struct platform_device *device)
1666 {
1667         int err;
1668
1669         if (has_cap(ACER_CAP_MAILLED)) {
1670                 err = acer_led_init(&device->dev);
1671                 if (err)
1672                         goto error_mailled;
1673         }
1674
1675         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1676                 err = acer_backlight_init(&device->dev);
1677                 if (err)
1678                         goto error_brightness;
1679         }
1680
1681         err = acer_rfkill_init(&device->dev);
1682         if (err)
1683                 goto error_rfkill;
1684
1685         return err;
1686
1687 error_rfkill:
1688         if (has_cap(ACER_CAP_BRIGHTNESS))
1689                 acer_backlight_exit();
1690 error_brightness:
1691         if (has_cap(ACER_CAP_MAILLED))
1692                 acer_led_exit();
1693 error_mailled:
1694         return err;
1695 }
1696
1697 static int acer_platform_remove(struct platform_device *device)
1698 {
1699         if (has_cap(ACER_CAP_MAILLED))
1700                 acer_led_exit();
1701         if (has_cap(ACER_CAP_BRIGHTNESS))
1702                 acer_backlight_exit();
1703
1704         acer_rfkill_exit();
1705         return 0;
1706 }
1707
1708 static int acer_platform_suspend(struct platform_device *dev,
1709 pm_message_t state)
1710 {
1711         u32 value;
1712         struct acer_data *data = &interface->data;
1713
1714         if (!data)
1715                 return -ENOMEM;
1716
1717         if (has_cap(ACER_CAP_MAILLED)) {
1718                 get_u32(&value, ACER_CAP_MAILLED);
1719                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1720                 data->mailled = value;
1721         }
1722
1723         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1724                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1725                 data->brightness = value;
1726         }
1727
1728         return 0;
1729 }
1730
1731 static int acer_platform_resume(struct platform_device *device)
1732 {
1733         struct acer_data *data = &interface->data;
1734
1735         if (!data)
1736                 return -ENOMEM;
1737
1738         if (has_cap(ACER_CAP_MAILLED))
1739                 set_u32(data->mailled, ACER_CAP_MAILLED);
1740
1741         if (has_cap(ACER_CAP_BRIGHTNESS))
1742                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1743
1744         return 0;
1745 }
1746
1747 static void acer_platform_shutdown(struct platform_device *device)
1748 {
1749         struct acer_data *data = &interface->data;
1750
1751         if (!data)
1752                 return;
1753
1754         if (has_cap(ACER_CAP_MAILLED))
1755                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1756 }
1757
1758 static struct platform_driver acer_platform_driver = {
1759         .driver = {
1760                 .name = "acer-wmi",
1761                 .owner = THIS_MODULE,
1762         },
1763         .probe = acer_platform_probe,
1764         .remove = acer_platform_remove,
1765         .suspend = acer_platform_suspend,
1766         .resume = acer_platform_resume,
1767         .shutdown = acer_platform_shutdown,
1768 };
1769
1770 static struct platform_device *acer_platform_device;
1771
1772 static int remove_sysfs(struct platform_device *device)
1773 {
1774         if (has_cap(ACER_CAP_THREEG))
1775                 device_remove_file(&device->dev, &dev_attr_threeg);
1776
1777         device_remove_file(&device->dev, &dev_attr_interface);
1778
1779         return 0;
1780 }
1781
1782 static int create_sysfs(void)
1783 {
1784         int retval = -ENOMEM;
1785
1786         if (has_cap(ACER_CAP_THREEG)) {
1787                 retval = device_create_file(&acer_platform_device->dev,
1788                         &dev_attr_threeg);
1789                 if (retval)
1790                         goto error_sysfs;
1791         }
1792
1793         retval = device_create_file(&acer_platform_device->dev,
1794                 &dev_attr_interface);
1795         if (retval)
1796                 goto error_sysfs;
1797
1798         return 0;
1799
1800 error_sysfs:
1801                 remove_sysfs(acer_platform_device);
1802         return retval;
1803 }
1804
1805 static void remove_debugfs(void)
1806 {
1807         debugfs_remove(interface->debug.devices);
1808         debugfs_remove(interface->debug.root);
1809 }
1810
1811 static int create_debugfs(void)
1812 {
1813         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1814         if (!interface->debug.root) {
1815                 pr_err("Failed to create debugfs directory");
1816                 return -ENOMEM;
1817         }
1818
1819         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1820                                         interface->debug.root,
1821                                         &interface->debug.wmid_devices);
1822         if (!interface->debug.devices)
1823                 goto error_debugfs;
1824
1825         return 0;
1826
1827 error_debugfs:
1828         remove_debugfs();
1829         return -ENOMEM;
1830 }
1831
1832 static int __init acer_wmi_init(void)
1833 {
1834         int err;
1835
1836         pr_info("Acer Laptop ACPI-WMI Extras\n");
1837
1838         if (dmi_check_system(acer_blacklist)) {
1839                 pr_info("Blacklisted hardware detected - not loading\n");
1840                 return -ENODEV;
1841         }
1842
1843         find_quirks();
1844
1845         /*
1846          * Detect which ACPI-WMI interface we're using.
1847          */
1848         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1849                 interface = &AMW0_V2_interface;
1850
1851         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1852                 interface = &wmid_interface;
1853
1854         if (wmi_has_guid(WMID_GUID2) && interface) {
1855                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1856                         pr_err("Unable to detect available WMID devices\n");
1857                         return -ENODEV;
1858                 }
1859         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1860                 pr_err("No WMID device detection method found\n");
1861                 return -ENODEV;
1862         }
1863
1864         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1865                 interface = &AMW0_interface;
1866
1867                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1868                         pr_err("Unable to detect available AMW0 devices\n");
1869                         return -ENODEV;
1870                 }
1871         }
1872
1873         if (wmi_has_guid(AMW0_GUID1))
1874                 AMW0_find_mailled();
1875
1876         if (!interface) {
1877                 pr_err("No or unsupported WMI interface, unable to load\n");
1878                 return -ENODEV;
1879         }
1880
1881         set_quirks();
1882
1883         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1884                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1885                 pr_info("Brightness must be controlled by "
1886                        "generic video driver\n");
1887         }
1888
1889         if (wmi_has_guid(WMID_GUID3)) {
1890                 if (ec_raw_mode) {
1891                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1892                                 pr_err("Cannot enable EC raw mode\n");
1893                                 return -ENODEV;
1894                         }
1895                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1896                         pr_err("Cannot enable Launch Manager mode\n");
1897                         return -ENODEV;
1898                 }
1899         } else if (ec_raw_mode) {
1900                 pr_info("No WMID EC raw mode enable method\n");
1901         }
1902
1903         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1904                 err = acer_wmi_input_setup();
1905                 if (err)
1906                         return err;
1907         }
1908
1909         err = platform_driver_register(&acer_platform_driver);
1910         if (err) {
1911                 pr_err("Unable to register platform driver.\n");
1912                 goto error_platform_register;
1913         }
1914
1915         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1916         if (!acer_platform_device) {
1917                 err = -ENOMEM;
1918                 goto error_device_alloc;
1919         }
1920
1921         err = platform_device_add(acer_platform_device);
1922         if (err)
1923                 goto error_device_add;
1924
1925         err = create_sysfs();
1926         if (err)
1927                 goto error_create_sys;
1928
1929         if (wmi_has_guid(WMID_GUID2)) {
1930                 interface->debug.wmid_devices = get_wmid_devices();
1931                 err = create_debugfs();
1932                 if (err)
1933                         goto error_create_debugfs;
1934         }
1935
1936         /* Override any initial settings with values from the commandline */
1937         acer_commandline_init();
1938
1939         return 0;
1940
1941 error_create_debugfs:
1942         remove_sysfs(acer_platform_device);
1943 error_create_sys:
1944         platform_device_del(acer_platform_device);
1945 error_device_add:
1946         platform_device_put(acer_platform_device);
1947 error_device_alloc:
1948         platform_driver_unregister(&acer_platform_driver);
1949 error_platform_register:
1950         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1951                 acer_wmi_input_destroy();
1952
1953         return err;
1954 }
1955
1956 static void __exit acer_wmi_exit(void)
1957 {
1958         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1959                 acer_wmi_input_destroy();
1960
1961         remove_sysfs(acer_platform_device);
1962         remove_debugfs();
1963         platform_device_unregister(acer_platform_device);
1964         platform_driver_unregister(&acer_platform_driver);
1965
1966         pr_info("Acer Laptop WMI Extras unloaded\n");
1967         return;
1968 }
1969
1970 module_init(acer_wmi_init);
1971 module_exit(acer_wmi_exit);