acer-wmi: support to set communication device state by new wmid method
[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 {
758                 tmp = 0;
759         }
760
761         if (out)
762                 *out = tmp;
763
764         kfree(result.pointer);
765
766         return status;
767 }
768
769 static acpi_status WMID_get_u32(u32 *value, u32 cap,
770 struct wmi_interface *iface)
771 {
772         acpi_status status;
773         u8 tmp;
774         u32 result, method_id = 0;
775
776         switch (cap) {
777         case ACER_CAP_WIRELESS:
778                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
779                 break;
780         case ACER_CAP_BLUETOOTH:
781                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
782                 break;
783         case ACER_CAP_BRIGHTNESS:
784                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
785                 break;
786         case ACER_CAP_THREEG:
787                 method_id = ACER_WMID_GET_THREEG_METHODID;
788                 break;
789         case ACER_CAP_MAILLED:
790                 if (quirks->mailled == 1) {
791                         ec_read(0x9f, &tmp);
792                         *value = tmp & 0x1;
793                         return 0;
794                 }
795         default:
796                 return AE_ERROR;
797         }
798         status = WMI_execute_u32(method_id, 0, &result);
799
800         if (ACPI_SUCCESS(status))
801                 *value = (u8)result;
802
803         return status;
804 }
805
806 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
807 {
808         u32 method_id = 0;
809         char param;
810
811         switch (cap) {
812         case ACER_CAP_BRIGHTNESS:
813                 if (value > max_brightness)
814                         return AE_BAD_PARAMETER;
815                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
816                 break;
817         case ACER_CAP_WIRELESS:
818                 if (value > 1)
819                         return AE_BAD_PARAMETER;
820                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
821                 break;
822         case ACER_CAP_BLUETOOTH:
823                 if (value > 1)
824                         return AE_BAD_PARAMETER;
825                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
826                 break;
827         case ACER_CAP_THREEG:
828                 if (value > 1)
829                         return AE_BAD_PARAMETER;
830                 method_id = ACER_WMID_SET_THREEG_METHODID;
831                 break;
832         case ACER_CAP_MAILLED:
833                 if (value > 1)
834                         return AE_BAD_PARAMETER;
835                 if (quirks->mailled == 1) {
836                         param = value ? 0x92 : 0x93;
837                         i8042_lock_chip();
838                         i8042_command(&param, 0x1059);
839                         i8042_unlock_chip();
840                         return 0;
841                 }
842                 break;
843         default:
844                 return AE_ERROR;
845         }
846         return WMI_execute_u32(method_id, (u32)value, NULL);
847 }
848
849 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
850 {
851         struct hotkey_function_type_aa *type_aa;
852
853         /* We are looking for OEM-specific Type AAh */
854         if (header->type != 0xAA)
855                 return;
856
857         has_type_aa = true;
858         type_aa = (struct hotkey_function_type_aa *) header;
859
860         pr_info("Function bitmap for Communication Button: 0x%x\n",
861                 type_aa->commun_func_bitmap);
862
863         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
864                 interface->capability |= ACER_CAP_WIRELESS;
865         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
866                 interface->capability |= ACER_CAP_THREEG;
867         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
868                 interface->capability |= ACER_CAP_BLUETOOTH;
869 }
870
871 static acpi_status WMID_set_capabilities(void)
872 {
873         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
874         union acpi_object *obj;
875         acpi_status status;
876         u32 devices;
877
878         status = wmi_query_block(WMID_GUID2, 1, &out);
879         if (ACPI_FAILURE(status))
880                 return status;
881
882         obj = (union acpi_object *) out.pointer;
883         if (obj && obj->type == ACPI_TYPE_BUFFER &&
884                 (obj->buffer.length == sizeof(u32) ||
885                 obj->buffer.length == sizeof(u64))) {
886                 devices = *((u32 *) obj->buffer.pointer);
887         } else {
888                 kfree(out.pointer);
889                 return AE_ERROR;
890         }
891
892         dmi_walk(type_aa_dmi_decode, NULL);
893         if (!has_type_aa) {
894                 interface->capability |= ACER_CAP_WIRELESS;
895                 if (devices & 0x40)
896                         interface->capability |= ACER_CAP_THREEG;
897                 if (devices & 0x10)
898                         interface->capability |= ACER_CAP_BLUETOOTH;
899         }
900
901         /* WMID always provides brightness methods */
902         interface->capability |= ACER_CAP_BRIGHTNESS;
903
904         if (!(devices & 0x20))
905                 max_brightness = 0x9;
906
907         kfree(out.pointer);
908         return status;
909 }
910
911 static struct wmi_interface wmid_interface = {
912         .type = ACER_WMID,
913 };
914
915 /*
916  * Generic Device (interface-independent)
917  */
918
919 static acpi_status get_u32(u32 *value, u32 cap)
920 {
921         acpi_status status = AE_ERROR;
922
923         switch (interface->type) {
924         case ACER_AMW0:
925                 status = AMW0_get_u32(value, cap, interface);
926                 break;
927         case ACER_AMW0_V2:
928                 if (cap == ACER_CAP_MAILLED) {
929                         status = AMW0_get_u32(value, cap, interface);
930                         break;
931                 }
932         case ACER_WMID:
933                 status = WMID_get_u32(value, cap, interface);
934                 break;
935         }
936
937         return status;
938 }
939
940 static acpi_status set_u32(u32 value, u32 cap)
941 {
942         acpi_status status;
943
944         if (interface->capability & cap) {
945                 switch (interface->type) {
946                 case ACER_AMW0:
947                         return AMW0_set_u32(value, cap, interface);
948                 case ACER_AMW0_V2:
949                         if (cap == ACER_CAP_MAILLED)
950                                 return AMW0_set_u32(value, cap, interface);
951
952                         /*
953                          * On some models, some WMID methods don't toggle
954                          * properly. For those cases, we want to run the AMW0
955                          * method afterwards to be certain we've really toggled
956                          * the device state.
957                          */
958                         if (cap == ACER_CAP_WIRELESS ||
959                                 cap == ACER_CAP_BLUETOOTH) {
960                                 status = WMID_set_u32(value, cap, interface);
961                                 if (ACPI_FAILURE(status))
962                                         return status;
963
964                                 return AMW0_set_u32(value, cap, interface);
965                         }
966                 case ACER_WMID:
967                         return WMID_set_u32(value, cap, interface);
968                 default:
969                         return AE_BAD_PARAMETER;
970                 }
971         }
972         return AE_BAD_PARAMETER;
973 }
974
975 static void __init acer_commandline_init(void)
976 {
977         /*
978          * These will all fail silently if the value given is invalid, or the
979          * capability isn't available on the given interface
980          */
981         if (mailled >= 0)
982                 set_u32(mailled, ACER_CAP_MAILLED);
983         if (!has_type_aa && threeg >= 0)
984                 set_u32(threeg, ACER_CAP_THREEG);
985         if (brightness >= 0)
986                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
987 }
988
989 /*
990  * LED device (Mail LED only, no other LEDs known yet)
991  */
992 static void mail_led_set(struct led_classdev *led_cdev,
993 enum led_brightness value)
994 {
995         set_u32(value, ACER_CAP_MAILLED);
996 }
997
998 static struct led_classdev mail_led = {
999         .name = "acer-wmi::mail",
1000         .brightness_set = mail_led_set,
1001 };
1002
1003 static int __devinit acer_led_init(struct device *dev)
1004 {
1005         return led_classdev_register(dev, &mail_led);
1006 }
1007
1008 static void acer_led_exit(void)
1009 {
1010         set_u32(LED_OFF, ACER_CAP_MAILLED);
1011         led_classdev_unregister(&mail_led);
1012 }
1013
1014 /*
1015  * Backlight device
1016  */
1017 static struct backlight_device *acer_backlight_device;
1018
1019 static int read_brightness(struct backlight_device *bd)
1020 {
1021         u32 value;
1022         get_u32(&value, ACER_CAP_BRIGHTNESS);
1023         return value;
1024 }
1025
1026 static int update_bl_status(struct backlight_device *bd)
1027 {
1028         int intensity = bd->props.brightness;
1029
1030         if (bd->props.power != FB_BLANK_UNBLANK)
1031                 intensity = 0;
1032         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1033                 intensity = 0;
1034
1035         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1036
1037         return 0;
1038 }
1039
1040 static const struct backlight_ops acer_bl_ops = {
1041         .get_brightness = read_brightness,
1042         .update_status = update_bl_status,
1043 };
1044
1045 static int __devinit acer_backlight_init(struct device *dev)
1046 {
1047         struct backlight_properties props;
1048         struct backlight_device *bd;
1049
1050         memset(&props, 0, sizeof(struct backlight_properties));
1051         props.type = BACKLIGHT_PLATFORM;
1052         props.max_brightness = max_brightness;
1053         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1054                                        &props);
1055         if (IS_ERR(bd)) {
1056                 pr_err("Could not register Acer backlight device\n");
1057                 acer_backlight_device = NULL;
1058                 return PTR_ERR(bd);
1059         }
1060
1061         acer_backlight_device = bd;
1062
1063         bd->props.power = FB_BLANK_UNBLANK;
1064         bd->props.brightness = read_brightness(bd);
1065         backlight_update_status(bd);
1066         return 0;
1067 }
1068
1069 static void acer_backlight_exit(void)
1070 {
1071         backlight_device_unregister(acer_backlight_device);
1072 }
1073
1074 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1075 {
1076         struct wmid3_gds_return_value return_value;
1077         acpi_status status;
1078         union acpi_object *obj;
1079         struct wmid3_gds_input_param params = {
1080                 .function_num = 0x1,
1081                 .hotkey_number = 0x01,
1082                 .devices = device,
1083         };
1084         struct acpi_buffer input = {
1085                 sizeof(struct wmid3_gds_input_param),
1086                 &params
1087         };
1088         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1089
1090         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1091         if (ACPI_FAILURE(status))
1092                 return status;
1093
1094         obj = output.pointer;
1095
1096         if (!obj)
1097                 return AE_ERROR;
1098         else if (obj->type != ACPI_TYPE_BUFFER) {
1099                 kfree(obj);
1100                 return AE_ERROR;
1101         }
1102         if (obj->buffer.length != 8) {
1103                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1104                 kfree(obj);
1105                 return AE_ERROR;
1106         }
1107
1108         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1109         kfree(obj);
1110
1111         if (return_value.error_code || return_value.ec_return_value)
1112                 pr_warn("Get Device Status failed: 0x%x - 0x%x\n",
1113                         return_value.error_code,
1114                         return_value.ec_return_value);
1115         else
1116                 *value = !!(return_value.devices & device);
1117
1118         return status;
1119 }
1120
1121 static acpi_status get_device_status(u32 *value, u32 cap)
1122 {
1123         if (wmi_has_guid(WMID_GUID3)) {
1124                 u16 device;
1125
1126                 switch (cap) {
1127                 case ACER_CAP_WIRELESS:
1128                         device = ACER_WMID3_GDS_WIRELESS;
1129                         break;
1130                 case ACER_CAP_BLUETOOTH:
1131                         device = ACER_WMID3_GDS_BLUETOOTH;
1132                         break;
1133                 case ACER_CAP_THREEG:
1134                         device = ACER_WMID3_GDS_THREEG;
1135                         break;
1136                 default:
1137                         return AE_ERROR;
1138                 }
1139                 return wmid3_get_device_status(value, device);
1140
1141         } else {
1142                 return get_u32(value, cap);
1143         }
1144 }
1145
1146 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1147 {
1148         struct wmid3_gds_return_value return_value;
1149         acpi_status status;
1150         union acpi_object *obj;
1151         u16 devices;
1152         struct wmid3_gds_input_param params = {
1153                 .function_num = 0x1,
1154                 .hotkey_number = 0x01,
1155                 .devices = ACER_WMID3_GDS_WIRELESS &
1156                                 ACER_WMID3_GDS_THREEG &
1157                                 ACER_WMID3_GDS_WIMAX &
1158                                 ACER_WMID3_GDS_BLUETOOTH,
1159         };
1160         struct acpi_buffer input = {
1161                 sizeof(struct wmid3_gds_input_param),
1162                 &params
1163         };
1164         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1165         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1166
1167         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1168         if (ACPI_FAILURE(status))
1169                 return status;
1170
1171         obj = output.pointer;
1172
1173         if (!obj)
1174                 return AE_ERROR;
1175         else if (obj->type != ACPI_TYPE_BUFFER) {
1176                 kfree(obj);
1177                 return AE_ERROR;
1178         }
1179         if (obj->buffer.length != 8) {
1180                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1181                 kfree(obj);
1182                 return AE_ERROR;
1183         }
1184
1185         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1186         kfree(obj);
1187
1188         if (return_value.error_code || return_value.ec_return_value) {
1189                 pr_warning("Get Current Device Status failed: "
1190                         "0x%x - 0x%x\n", return_value.error_code,
1191                         return_value.ec_return_value);
1192                 return status;
1193         }
1194
1195         devices = return_value.devices;
1196         params.function_num = 0x2;
1197         params.hotkey_number = 0x01;
1198         params.devices = (value) ? (devices | device) : (devices & ~device);
1199
1200         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1201         if (ACPI_FAILURE(status))
1202                 return status;
1203
1204         obj = output2.pointer;
1205
1206         if (!obj)
1207                 return AE_ERROR;
1208         else if (obj->type != ACPI_TYPE_BUFFER) {
1209                 kfree(obj);
1210                 return AE_ERROR;
1211         }
1212         if (obj->buffer.length != 4) {
1213                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1214                 kfree(obj);
1215                 return AE_ERROR;
1216         }
1217
1218         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1219         kfree(obj);
1220
1221         if (return_value.error_code || return_value.ec_return_value)
1222                 pr_warning("Set Device Status failed: "
1223                         "0x%x - 0x%x\n", return_value.error_code,
1224                         return_value.ec_return_value);
1225
1226         return status;
1227 }
1228
1229 static acpi_status set_device_status(u32 value, u32 cap)
1230 {
1231         if (wmi_has_guid(WMID_GUID3)) {
1232                 u16 device;
1233
1234                 switch (cap) {
1235                 case ACER_CAP_WIRELESS:
1236                         device = ACER_WMID3_GDS_WIRELESS;
1237                         break;
1238                 case ACER_CAP_BLUETOOTH:
1239                         device = ACER_WMID3_GDS_BLUETOOTH;
1240                         break;
1241                 case ACER_CAP_THREEG:
1242                         device = ACER_WMID3_GDS_THREEG;
1243                         break;
1244                 default:
1245                         return AE_ERROR;
1246                 }
1247                 return wmid3_set_device_status(value, device);
1248
1249         } else {
1250                 return set_u32(value, cap);
1251         }
1252 }
1253
1254 /*
1255  * Rfkill devices
1256  */
1257 static void acer_rfkill_update(struct work_struct *ignored);
1258 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1259 static void acer_rfkill_update(struct work_struct *ignored)
1260 {
1261         u32 state;
1262         acpi_status status;
1263
1264         status = get_u32(&state, ACER_CAP_WIRELESS);
1265         if (ACPI_SUCCESS(status))
1266                 rfkill_set_sw_state(wireless_rfkill, !state);
1267
1268         if (has_cap(ACER_CAP_BLUETOOTH)) {
1269                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1270                 if (ACPI_SUCCESS(status))
1271                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1272         }
1273
1274         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1275                 status = wmid3_get_device_status(&state,
1276                                 ACER_WMID3_GDS_THREEG);
1277                 if (ACPI_SUCCESS(status))
1278                         rfkill_set_sw_state(threeg_rfkill, !state);
1279         }
1280
1281         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1282 }
1283
1284 static int acer_rfkill_set(void *data, bool blocked)
1285 {
1286         acpi_status status;
1287         u32 cap = (unsigned long)data;
1288
1289         if (rfkill_inited) {
1290                 status = set_device_status(!blocked, cap);
1291                 if (ACPI_FAILURE(status))
1292                         return -ENODEV;
1293         }
1294
1295         return 0;
1296 }
1297
1298 static const struct rfkill_ops acer_rfkill_ops = {
1299         .set_block = acer_rfkill_set,
1300 };
1301
1302 static struct rfkill *acer_rfkill_register(struct device *dev,
1303                                            enum rfkill_type type,
1304                                            char *name, u32 cap)
1305 {
1306         int err;
1307         struct rfkill *rfkill_dev;
1308         u32 state;
1309         acpi_status status;
1310
1311         rfkill_dev = rfkill_alloc(name, dev, type,
1312                                   &acer_rfkill_ops,
1313                                   (void *)(unsigned long)cap);
1314         if (!rfkill_dev)
1315                 return ERR_PTR(-ENOMEM);
1316
1317         status = get_device_status(&state, cap);
1318
1319         err = rfkill_register(rfkill_dev);
1320         if (err) {
1321                 rfkill_destroy(rfkill_dev);
1322                 return ERR_PTR(err);
1323         }
1324
1325         if (ACPI_SUCCESS(status))
1326                 rfkill_set_sw_state(rfkill_dev, !state);
1327
1328         return rfkill_dev;
1329 }
1330
1331 static int acer_rfkill_init(struct device *dev)
1332 {
1333         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1334                 "acer-wireless", ACER_CAP_WIRELESS);
1335         if (IS_ERR(wireless_rfkill))
1336                 return PTR_ERR(wireless_rfkill);
1337
1338         if (has_cap(ACER_CAP_BLUETOOTH)) {
1339                 bluetooth_rfkill = acer_rfkill_register(dev,
1340                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1341                         ACER_CAP_BLUETOOTH);
1342                 if (IS_ERR(bluetooth_rfkill)) {
1343                         rfkill_unregister(wireless_rfkill);
1344                         rfkill_destroy(wireless_rfkill);
1345                         return PTR_ERR(bluetooth_rfkill);
1346                 }
1347         }
1348
1349         if (has_cap(ACER_CAP_THREEG)) {
1350                 threeg_rfkill = acer_rfkill_register(dev,
1351                         RFKILL_TYPE_WWAN, "acer-threeg",
1352                         ACER_CAP_THREEG);
1353                 if (IS_ERR(threeg_rfkill)) {
1354                         rfkill_unregister(wireless_rfkill);
1355                         rfkill_destroy(wireless_rfkill);
1356                         rfkill_unregister(bluetooth_rfkill);
1357                         rfkill_destroy(bluetooth_rfkill);
1358                         return PTR_ERR(threeg_rfkill);
1359                 }
1360         }
1361
1362         rfkill_inited = true;
1363
1364         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1365                 schedule_delayed_work(&acer_rfkill_work,
1366                         round_jiffies_relative(HZ));
1367
1368         return 0;
1369 }
1370
1371 static void acer_rfkill_exit(void)
1372 {
1373         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1374                 cancel_delayed_work_sync(&acer_rfkill_work);
1375
1376         rfkill_unregister(wireless_rfkill);
1377         rfkill_destroy(wireless_rfkill);
1378
1379         if (has_cap(ACER_CAP_BLUETOOTH)) {
1380                 rfkill_unregister(bluetooth_rfkill);
1381                 rfkill_destroy(bluetooth_rfkill);
1382         }
1383
1384         if (has_cap(ACER_CAP_THREEG)) {
1385                 rfkill_unregister(threeg_rfkill);
1386                 rfkill_destroy(threeg_rfkill);
1387         }
1388         return;
1389 }
1390
1391 /*
1392  * sysfs interface
1393  */
1394 static ssize_t show_bool_threeg(struct device *dev,
1395         struct device_attribute *attr, char *buf)
1396 {
1397         u32 result; \
1398         acpi_status status;
1399         if (wmi_has_guid(WMID_GUID3))
1400                 status = wmid3_get_device_status(&result,
1401                                 ACER_WMID3_GDS_THREEG);
1402         else
1403                 status = get_u32(&result, ACER_CAP_THREEG);
1404         if (ACPI_SUCCESS(status))
1405                 return sprintf(buf, "%u\n", result);
1406         return sprintf(buf, "Read error\n");
1407 }
1408
1409 static ssize_t set_bool_threeg(struct device *dev,
1410         struct device_attribute *attr, const char *buf, size_t count)
1411 {
1412         u32 tmp = simple_strtoul(buf, NULL, 10);
1413         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1414                 if (ACPI_FAILURE(status))
1415                         return -EINVAL;
1416         return count;
1417 }
1418 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1419         set_bool_threeg);
1420
1421 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1422         char *buf)
1423 {
1424         switch (interface->type) {
1425         case ACER_AMW0:
1426                 return sprintf(buf, "AMW0\n");
1427         case ACER_AMW0_V2:
1428                 return sprintf(buf, "AMW0 v2\n");
1429         case ACER_WMID:
1430                 return sprintf(buf, "WMID\n");
1431         default:
1432                 return sprintf(buf, "Error!\n");
1433         }
1434 }
1435
1436 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1437
1438 static void acer_wmi_notify(u32 value, void *context)
1439 {
1440         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1441         union acpi_object *obj;
1442         struct event_return_value return_value;
1443         acpi_status status;
1444
1445         status = wmi_get_event_data(value, &response);
1446         if (status != AE_OK) {
1447                 pr_warn("bad event status 0x%x\n", status);
1448                 return;
1449         }
1450
1451         obj = (union acpi_object *)response.pointer;
1452
1453         if (!obj)
1454                 return;
1455         if (obj->type != ACPI_TYPE_BUFFER) {
1456                 pr_warn("Unknown response received %d\n", obj->type);
1457                 kfree(obj);
1458                 return;
1459         }
1460         if (obj->buffer.length != 8) {
1461                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1462                 kfree(obj);
1463                 return;
1464         }
1465
1466         return_value = *((struct event_return_value *)obj->buffer.pointer);
1467         kfree(obj);
1468
1469         switch (return_value.function) {
1470         case WMID_HOTKEY_EVENT:
1471                 if (return_value.device_state) {
1472                         u16 device_state = return_value.device_state;
1473                         pr_debug("device state: 0x%x\n", device_state);
1474                         if (has_cap(ACER_CAP_WIRELESS))
1475                                 rfkill_set_sw_state(wireless_rfkill,
1476                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1477                         if (has_cap(ACER_CAP_BLUETOOTH))
1478                                 rfkill_set_sw_state(bluetooth_rfkill,
1479                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1480                         if (has_cap(ACER_CAP_THREEG))
1481                                 rfkill_set_sw_state(threeg_rfkill,
1482                                 !(device_state & ACER_WMID3_GDS_THREEG));
1483                 }
1484                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1485                                 return_value.key_num, 1, true))
1486                         pr_warn("Unknown key number - 0x%x\n",
1487                                 return_value.key_num);
1488                 break;
1489         default:
1490                 pr_warn("Unknown function number - %d - %d\n",
1491                         return_value.function, return_value.key_num);
1492                 break;
1493         }
1494 }
1495
1496 static acpi_status
1497 wmid3_set_lm_mode(struct lm_input_params *params,
1498                   struct lm_return_value *return_value)
1499 {
1500         acpi_status status;
1501         union acpi_object *obj;
1502
1503         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1504         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1505
1506         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1507         if (ACPI_FAILURE(status))
1508                 return status;
1509
1510         obj = output.pointer;
1511
1512         if (!obj)
1513                 return AE_ERROR;
1514         else if (obj->type != ACPI_TYPE_BUFFER) {
1515                 kfree(obj);
1516                 return AE_ERROR;
1517         }
1518         if (obj->buffer.length != 4) {
1519                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1520                 kfree(obj);
1521                 return AE_ERROR;
1522         }
1523
1524         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1525         kfree(obj);
1526
1527         return status;
1528 }
1529
1530 static int acer_wmi_enable_ec_raw(void)
1531 {
1532         struct lm_return_value return_value;
1533         acpi_status status;
1534         struct lm_input_params params = {
1535                 .function_num = 0x1,
1536                 .commun_devices = 0xFFFF,
1537                 .devices = 0xFFFF,
1538                 .lm_status = 0x00,            /* Launch Manager Deactive */
1539         };
1540
1541         status = wmid3_set_lm_mode(&params, &return_value);
1542
1543         if (return_value.error_code || return_value.ec_return_value)
1544                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1545                         return_value.error_code,
1546                         return_value.ec_return_value);
1547         else
1548                 pr_info("Enabled EC raw mode\n");
1549
1550         return status;
1551 }
1552
1553 static int acer_wmi_enable_lm(void)
1554 {
1555         struct lm_return_value return_value;
1556         acpi_status status;
1557         struct lm_input_params params = {
1558                 .function_num = 0x1,
1559                 .commun_devices = 0xFFFF,
1560                 .devices = 0xFFFF,
1561                 .lm_status = 0x01,            /* Launch Manager Active */
1562         };
1563
1564         status = wmid3_set_lm_mode(&params, &return_value);
1565
1566         if (return_value.error_code || return_value.ec_return_value)
1567                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1568                         return_value.error_code,
1569                         return_value.ec_return_value);
1570
1571         return status;
1572 }
1573
1574 static int __init acer_wmi_input_setup(void)
1575 {
1576         acpi_status status;
1577         int err;
1578
1579         acer_wmi_input_dev = input_allocate_device();
1580         if (!acer_wmi_input_dev)
1581                 return -ENOMEM;
1582
1583         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1584         acer_wmi_input_dev->phys = "wmi/input0";
1585         acer_wmi_input_dev->id.bustype = BUS_HOST;
1586
1587         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1588         if (err)
1589                 goto err_free_dev;
1590
1591         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1592                                                 acer_wmi_notify, NULL);
1593         if (ACPI_FAILURE(status)) {
1594                 err = -EIO;
1595                 goto err_free_keymap;
1596         }
1597
1598         err = input_register_device(acer_wmi_input_dev);
1599         if (err)
1600                 goto err_uninstall_notifier;
1601
1602         return 0;
1603
1604 err_uninstall_notifier:
1605         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1606 err_free_keymap:
1607         sparse_keymap_free(acer_wmi_input_dev);
1608 err_free_dev:
1609         input_free_device(acer_wmi_input_dev);
1610         return err;
1611 }
1612
1613 static void acer_wmi_input_destroy(void)
1614 {
1615         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1616         sparse_keymap_free(acer_wmi_input_dev);
1617         input_unregister_device(acer_wmi_input_dev);
1618 }
1619
1620 /*
1621  * debugfs functions
1622  */
1623 static u32 get_wmid_devices(void)
1624 {
1625         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1626         union acpi_object *obj;
1627         acpi_status status;
1628         u32 devices = 0;
1629
1630         status = wmi_query_block(WMID_GUID2, 1, &out);
1631         if (ACPI_FAILURE(status))
1632                 return 0;
1633
1634         obj = (union acpi_object *) out.pointer;
1635         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1636                 (obj->buffer.length == sizeof(u32) ||
1637                 obj->buffer.length == sizeof(u64))) {
1638                 devices = *((u32 *) obj->buffer.pointer);
1639         }
1640
1641         kfree(out.pointer);
1642         return devices;
1643 }
1644
1645 /*
1646  * Platform device
1647  */
1648 static int __devinit acer_platform_probe(struct platform_device *device)
1649 {
1650         int err;
1651
1652         if (has_cap(ACER_CAP_MAILLED)) {
1653                 err = acer_led_init(&device->dev);
1654                 if (err)
1655                         goto error_mailled;
1656         }
1657
1658         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1659                 err = acer_backlight_init(&device->dev);
1660                 if (err)
1661                         goto error_brightness;
1662         }
1663
1664         err = acer_rfkill_init(&device->dev);
1665         if (err)
1666                 goto error_rfkill;
1667
1668         return err;
1669
1670 error_rfkill:
1671         if (has_cap(ACER_CAP_BRIGHTNESS))
1672                 acer_backlight_exit();
1673 error_brightness:
1674         if (has_cap(ACER_CAP_MAILLED))
1675                 acer_led_exit();
1676 error_mailled:
1677         return err;
1678 }
1679
1680 static int acer_platform_remove(struct platform_device *device)
1681 {
1682         if (has_cap(ACER_CAP_MAILLED))
1683                 acer_led_exit();
1684         if (has_cap(ACER_CAP_BRIGHTNESS))
1685                 acer_backlight_exit();
1686
1687         acer_rfkill_exit();
1688         return 0;
1689 }
1690
1691 static int acer_platform_suspend(struct platform_device *dev,
1692 pm_message_t state)
1693 {
1694         u32 value;
1695         struct acer_data *data = &interface->data;
1696
1697         if (!data)
1698                 return -ENOMEM;
1699
1700         if (has_cap(ACER_CAP_MAILLED)) {
1701                 get_u32(&value, ACER_CAP_MAILLED);
1702                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1703                 data->mailled = value;
1704         }
1705
1706         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1707                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1708                 data->brightness = value;
1709         }
1710
1711         return 0;
1712 }
1713
1714 static int acer_platform_resume(struct platform_device *device)
1715 {
1716         struct acer_data *data = &interface->data;
1717
1718         if (!data)
1719                 return -ENOMEM;
1720
1721         if (has_cap(ACER_CAP_MAILLED))
1722                 set_u32(data->mailled, ACER_CAP_MAILLED);
1723
1724         if (has_cap(ACER_CAP_BRIGHTNESS))
1725                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1726
1727         return 0;
1728 }
1729
1730 static void acer_platform_shutdown(struct platform_device *device)
1731 {
1732         struct acer_data *data = &interface->data;
1733
1734         if (!data)
1735                 return;
1736
1737         if (has_cap(ACER_CAP_MAILLED))
1738                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1739 }
1740
1741 static struct platform_driver acer_platform_driver = {
1742         .driver = {
1743                 .name = "acer-wmi",
1744                 .owner = THIS_MODULE,
1745         },
1746         .probe = acer_platform_probe,
1747         .remove = acer_platform_remove,
1748         .suspend = acer_platform_suspend,
1749         .resume = acer_platform_resume,
1750         .shutdown = acer_platform_shutdown,
1751 };
1752
1753 static struct platform_device *acer_platform_device;
1754
1755 static int remove_sysfs(struct platform_device *device)
1756 {
1757         if (has_cap(ACER_CAP_THREEG))
1758                 device_remove_file(&device->dev, &dev_attr_threeg);
1759
1760         device_remove_file(&device->dev, &dev_attr_interface);
1761
1762         return 0;
1763 }
1764
1765 static int create_sysfs(void)
1766 {
1767         int retval = -ENOMEM;
1768
1769         if (has_cap(ACER_CAP_THREEG)) {
1770                 retval = device_create_file(&acer_platform_device->dev,
1771                         &dev_attr_threeg);
1772                 if (retval)
1773                         goto error_sysfs;
1774         }
1775
1776         retval = device_create_file(&acer_platform_device->dev,
1777                 &dev_attr_interface);
1778         if (retval)
1779                 goto error_sysfs;
1780
1781         return 0;
1782
1783 error_sysfs:
1784                 remove_sysfs(acer_platform_device);
1785         return retval;
1786 }
1787
1788 static void remove_debugfs(void)
1789 {
1790         debugfs_remove(interface->debug.devices);
1791         debugfs_remove(interface->debug.root);
1792 }
1793
1794 static int create_debugfs(void)
1795 {
1796         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1797         if (!interface->debug.root) {
1798                 pr_err("Failed to create debugfs directory");
1799                 return -ENOMEM;
1800         }
1801
1802         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1803                                         interface->debug.root,
1804                                         &interface->debug.wmid_devices);
1805         if (!interface->debug.devices)
1806                 goto error_debugfs;
1807
1808         return 0;
1809
1810 error_debugfs:
1811         remove_debugfs();
1812         return -ENOMEM;
1813 }
1814
1815 static int __init acer_wmi_init(void)
1816 {
1817         int err;
1818
1819         pr_info("Acer Laptop ACPI-WMI Extras\n");
1820
1821         if (dmi_check_system(acer_blacklist)) {
1822                 pr_info("Blacklisted hardware detected - not loading\n");
1823                 return -ENODEV;
1824         }
1825
1826         find_quirks();
1827
1828         /*
1829          * Detect which ACPI-WMI interface we're using.
1830          */
1831         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1832                 interface = &AMW0_V2_interface;
1833
1834         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1835                 interface = &wmid_interface;
1836
1837         if (wmi_has_guid(WMID_GUID2) && interface) {
1838                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1839                         pr_err("Unable to detect available WMID devices\n");
1840                         return -ENODEV;
1841                 }
1842         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1843                 pr_err("No WMID device detection method found\n");
1844                 return -ENODEV;
1845         }
1846
1847         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1848                 interface = &AMW0_interface;
1849
1850                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1851                         pr_err("Unable to detect available AMW0 devices\n");
1852                         return -ENODEV;
1853                 }
1854         }
1855
1856         if (wmi_has_guid(AMW0_GUID1))
1857                 AMW0_find_mailled();
1858
1859         if (!interface) {
1860                 pr_err("No or unsupported WMI interface, unable to load\n");
1861                 return -ENODEV;
1862         }
1863
1864         set_quirks();
1865
1866         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1867                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1868                 pr_info("Brightness must be controlled by "
1869                        "generic video driver\n");
1870         }
1871
1872         if (wmi_has_guid(WMID_GUID3)) {
1873                 if (ec_raw_mode) {
1874                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1875                                 pr_err("Cannot enable EC raw mode\n");
1876                                 return -ENODEV;
1877                         }
1878                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1879                         pr_err("Cannot enable Launch Manager mode\n");
1880                         return -ENODEV;
1881                 }
1882         } else if (ec_raw_mode) {
1883                 pr_info("No WMID EC raw mode enable method\n");
1884         }
1885
1886         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1887                 err = acer_wmi_input_setup();
1888                 if (err)
1889                         return err;
1890         }
1891
1892         err = platform_driver_register(&acer_platform_driver);
1893         if (err) {
1894                 pr_err("Unable to register platform driver.\n");
1895                 goto error_platform_register;
1896         }
1897
1898         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1899         if (!acer_platform_device) {
1900                 err = -ENOMEM;
1901                 goto error_device_alloc;
1902         }
1903
1904         err = platform_device_add(acer_platform_device);
1905         if (err)
1906                 goto error_device_add;
1907
1908         err = create_sysfs();
1909         if (err)
1910                 goto error_create_sys;
1911
1912         if (wmi_has_guid(WMID_GUID2)) {
1913                 interface->debug.wmid_devices = get_wmid_devices();
1914                 err = create_debugfs();
1915                 if (err)
1916                         goto error_create_debugfs;
1917         }
1918
1919         /* Override any initial settings with values from the commandline */
1920         acer_commandline_init();
1921
1922         return 0;
1923
1924 error_create_debugfs:
1925         remove_sysfs(acer_platform_device);
1926 error_create_sys:
1927         platform_device_del(acer_platform_device);
1928 error_device_add:
1929         platform_device_put(acer_platform_device);
1930 error_device_alloc:
1931         platform_driver_unregister(&acer_platform_driver);
1932 error_platform_register:
1933         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1934                 acer_wmi_input_destroy();
1935
1936         return err;
1937 }
1938
1939 static void __exit acer_wmi_exit(void)
1940 {
1941         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1942                 acer_wmi_input_destroy();
1943
1944         remove_sysfs(acer_platform_device);
1945         remove_debugfs();
1946         platform_device_unregister(acer_platform_device);
1947         platform_driver_unregister(&acer_platform_driver);
1948
1949         pr_info("Acer Laptop WMI Extras unloaded\n");
1950         return;
1951 }
1952
1953 module_init(acer_wmi_init);
1954 module_exit(acer_wmi_exit);