Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/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 #include <acpi/video.h>
 45 
 46 MODULE_AUTHOR("Carlos Corbacho");
 47 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
 48 MODULE_LICENSE("GPL");
 49 
 50 /*
 51  * Magic Number
 52  * Meaning is unknown - this number is required for writing to ACPI for AMW0
 53  * (it's also used in acerhk when directly accessing the BIOS)
 54  */
 55 #define ACER_AMW0_WRITE 0x9610
 56 
 57 /*
 58  * Bit masks for the AMW0 interface
 59  */
 60 #define ACER_AMW0_WIRELESS_MASK  0x35
 61 #define ACER_AMW0_BLUETOOTH_MASK 0x34
 62 #define ACER_AMW0_MAILLED_MASK   0x31
 63 
 64 /*
 65  * Method IDs for WMID interface
 66  */
 67 #define ACER_WMID_GET_WIRELESS_METHODID         1
 68 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
 69 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
 70 #define ACER_WMID_SET_WIRELESS_METHODID         4
 71 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
 72 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
 73 #define ACER_WMID_GET_THREEG_METHODID           10
 74 #define ACER_WMID_SET_THREEG_METHODID           11
 75 
 76 /*
 77  * Acer ACPI method GUIDs
 78  */
 79 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
 80 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
 81 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
 82 #define WMID_GUID2              "95764E09-FB56-4E83-B31A-37761F60994A"
 83 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
 84 
 85 /*
 86  * Acer ACPI event GUIDs
 87  */
 88 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
 89 
 90 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
 91 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
 92 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
 93 
 94 enum acer_wmi_event_ids {
 95         WMID_HOTKEY_EVENT = 0x1,
 96         WMID_ACCEL_EVENT = 0x5,
 97 };
 98 
 99 static const struct key_entry acer_wmi_keymap[] __initconst = {
100         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
101         {KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
102         {KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
103         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
104         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
105         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
106         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
107         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
108         {KE_KEY, 0x29, {KEY_PROG3} },    /* P_Key for TM8372 */
109         {KE_IGNORE, 0x41, {KEY_MUTE} },
110         {KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
111         {KE_IGNORE, 0x4d, {KEY_PREVIOUSSONG} },
112         {KE_IGNORE, 0x43, {KEY_NEXTSONG} },
113         {KE_IGNORE, 0x4e, {KEY_NEXTSONG} },
114         {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
115         {KE_IGNORE, 0x4f, {KEY_PLAYPAUSE} },
116         {KE_IGNORE, 0x45, {KEY_STOP} },
117         {KE_IGNORE, 0x50, {KEY_STOP} },
118         {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
119         {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
120         {KE_IGNORE, 0x4a, {KEY_VOLUMEDOWN} },
121         {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
122         {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
123         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
124         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
125         {KE_IGNORE, 0x81, {KEY_SLEEP} },
126         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad Toggle */
127         {KE_KEY, KEY_TOUCHPAD_ON, {KEY_TOUCHPAD_ON} },
128         {KE_KEY, KEY_TOUCHPAD_OFF, {KEY_TOUCHPAD_OFF} },
129         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
130         {KE_KEY, 0x85, {KEY_TOUCHPAD_TOGGLE} },
131         {KE_END, 0}
132 };
133 
134 static struct input_dev *acer_wmi_input_dev;
135 static struct input_dev *acer_wmi_accel_dev;
136 
137 struct event_return_value {
138         u8 function;
139         u8 key_num;
140         u16 device_state;
141         u32 reserved;
142 } __attribute__((packed));
143 
144 /*
145  * GUID3 Get Device Status device flags
146  */
147 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
148 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
149 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
150 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
151 #define ACER_WMID3_GDS_TOUCHPAD         (1<<1)  /* Touchpad */
152 
153 struct lm_input_params {
154         u8 function_num;        /* Function Number */
155         u16 commun_devices;     /* Communication type devices default status */
156         u16 devices;            /* Other type devices default status */
157         u8 lm_status;           /* Launch Manager Status */
158         u16 reserved;
159 } __attribute__((packed));
160 
161 struct lm_return_value {
162         u8 error_code;          /* Error Code */
163         u8 ec_return_value;     /* EC Return Value */
164         u16 reserved;
165 } __attribute__((packed));
166 
167 struct wmid3_gds_set_input_param {     /* Set Device Status input parameter */
168         u8 function_num;        /* Function Number */
169         u8 hotkey_number;       /* Hotkey Number */
170         u16 devices;            /* Set Device */
171         u8 volume_value;        /* Volume Value */
172 } __attribute__((packed));
173 
174 struct wmid3_gds_get_input_param {     /* Get Device Status input parameter */
175         u8 function_num;        /* Function Number */
176         u8 hotkey_number;       /* Hotkey Number */
177         u16 devices;            /* Get Device */
178 } __attribute__((packed));
179 
180 struct wmid3_gds_return_value { /* Get Device Status return value*/
181         u8 error_code;          /* Error Code */
182         u8 ec_return_value;     /* EC Return Value */
183         u16 devices;            /* Current Device Status */
184         u32 reserved;
185 } __attribute__((packed));
186 
187 struct hotkey_function_type_aa {
188         u8 type;
189         u8 length;
190         u16 handle;
191         u16 commun_func_bitmap;
192         u16 application_func_bitmap;
193         u16 media_func_bitmap;
194         u16 display_func_bitmap;
195         u16 others_func_bitmap;
196         u8 commun_fn_key_number;
197 } __attribute__((packed));
198 
199 /*
200  * Interface capability flags
201  */
202 #define ACER_CAP_MAILLED                (1<<0)
203 #define ACER_CAP_WIRELESS               (1<<1)
204 #define ACER_CAP_BLUETOOTH              (1<<2)
205 #define ACER_CAP_BRIGHTNESS             (1<<3)
206 #define ACER_CAP_THREEG                 (1<<4)
207 #define ACER_CAP_ACCEL                  (1<<5)
208 #define ACER_CAP_ANY                    (0xFFFFFFFF)
209 
210 /*
211  * Interface type flags
212  */
213 enum interface_flags {
214         ACER_AMW0,
215         ACER_AMW0_V2,
216         ACER_WMID,
217         ACER_WMID_v2,
218 };
219 
220 #define ACER_DEFAULT_WIRELESS  0
221 #define ACER_DEFAULT_BLUETOOTH 0
222 #define ACER_DEFAULT_MAILLED   0
223 #define ACER_DEFAULT_THREEG    0
224 
225 static int max_brightness = 0xF;
226 
227 static int mailled = -1;
228 static int brightness = -1;
229 static int threeg = -1;
230 static int force_series;
231 static bool ec_raw_mode;
232 static bool has_type_aa;
233 static u16 commun_func_bitmap;
234 static u8 commun_fn_key_number;
235 
236 module_param(mailled, int, 0444);
237 module_param(brightness, int, 0444);
238 module_param(threeg, int, 0444);
239 module_param(force_series, int, 0444);
240 module_param(ec_raw_mode, bool, 0444);
241 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
242 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
243 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
244 MODULE_PARM_DESC(force_series, "Force a different laptop series");
245 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
246 
247 struct acer_data {
248         int mailled;
249         int threeg;
250         int brightness;
251 };
252 
253 struct acer_debug {
254         struct dentry *root;
255         struct dentry *devices;
256         u32 wmid_devices;
257 };
258 
259 static struct rfkill *wireless_rfkill;
260 static struct rfkill *bluetooth_rfkill;
261 static struct rfkill *threeg_rfkill;
262 static bool rfkill_inited;
263 
264 /* Each low-level interface must define at least some of the following */
265 struct wmi_interface {
266         /* The WMI device type */
267         u32 type;
268 
269         /* The capabilities this interface provides */
270         u32 capability;
271 
272         /* Private data for the current interface */
273         struct acer_data data;
274 
275         /* debugfs entries associated with this interface */
276         struct acer_debug debug;
277 };
278 
279 /* The static interface pointer, points to the currently detected interface */
280 static struct wmi_interface *interface;
281 
282 /*
283  * Embedded Controller quirks
284  * Some laptops require us to directly access the EC to either enable or query
285  * features that are not available through WMI.
286  */
287 
288 struct quirk_entry {
289         u8 wireless;
290         u8 mailled;
291         s8 brightness;
292         u8 bluetooth;
293 };
294 
295 static struct quirk_entry *quirks;
296 
297 static void __init set_quirks(void)
298 {
299         if (!interface)
300                 return;
301 
302         if (quirks->mailled)
303                 interface->capability |= ACER_CAP_MAILLED;
304 
305         if (quirks->brightness)
306                 interface->capability |= ACER_CAP_BRIGHTNESS;
307 }
308 
309 static int __init dmi_matched(const struct dmi_system_id *dmi)
310 {
311         quirks = dmi->driver_data;
312         return 1;
313 }
314 
315 static struct quirk_entry quirk_unknown = {
316 };
317 
318 static struct quirk_entry quirk_acer_aspire_1520 = {
319         .brightness = -1,
320 };
321 
322 static struct quirk_entry quirk_acer_travelmate_2490 = {
323         .mailled = 1,
324 };
325 
326 /* This AMW0 laptop has no bluetooth */
327 static struct quirk_entry quirk_medion_md_98300 = {
328         .wireless = 1,
329 };
330 
331 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
332         .wireless = 2,
333 };
334 
335 static struct quirk_entry quirk_lenovo_ideapad_s205 = {
336         .wireless = 3,
337 };
338 
339 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
340 static const struct dmi_system_id acer_blacklist[] __initconst = {
341         {
342                 .ident = "Acer Aspire One (SSD)",
343                 .matches = {
344                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
345                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
346                 },
347         },
348         {
349                 .ident = "Acer Aspire One (HDD)",
350                 .matches = {
351                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
352                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
353                 },
354         },
355         {}
356 };
357 
358 static const struct dmi_system_id acer_quirks[] __initconst = {
359         {
360                 .callback = dmi_matched,
361                 .ident = "Acer Aspire 1360",
362                 .matches = {
363                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
364                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
365                 },
366                 .driver_data = &quirk_acer_aspire_1520,
367         },
368         {
369                 .callback = dmi_matched,
370                 .ident = "Acer Aspire 1520",
371                 .matches = {
372                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
373                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
374                 },
375                 .driver_data = &quirk_acer_aspire_1520,
376         },
377         {
378                 .callback = dmi_matched,
379                 .ident = "Acer Aspire 3100",
380                 .matches = {
381                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
382                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
383                 },
384                 .driver_data = &quirk_acer_travelmate_2490,
385         },
386         {
387                 .callback = dmi_matched,
388                 .ident = "Acer Aspire 3610",
389                 .matches = {
390                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
391                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
392                 },
393                 .driver_data = &quirk_acer_travelmate_2490,
394         },
395         {
396                 .callback = dmi_matched,
397                 .ident = "Acer Aspire 5100",
398                 .matches = {
399                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
400                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
401                 },
402                 .driver_data = &quirk_acer_travelmate_2490,
403         },
404         {
405                 .callback = dmi_matched,
406                 .ident = "Acer Aspire 5610",
407                 .matches = {
408                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
409                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
410                 },
411                 .driver_data = &quirk_acer_travelmate_2490,
412         },
413         {
414                 .callback = dmi_matched,
415                 .ident = "Acer Aspire 5630",
416                 .matches = {
417                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
418                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
419                 },
420                 .driver_data = &quirk_acer_travelmate_2490,
421         },
422         {
423                 .callback = dmi_matched,
424                 .ident = "Acer Aspire 5650",
425                 .matches = {
426                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
427                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
428                 },
429                 .driver_data = &quirk_acer_travelmate_2490,
430         },
431         {
432                 .callback = dmi_matched,
433                 .ident = "Acer Aspire 5680",
434                 .matches = {
435                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
436                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
437                 },
438                 .driver_data = &quirk_acer_travelmate_2490,
439         },
440         {
441                 .callback = dmi_matched,
442                 .ident = "Acer Aspire 9110",
443                 .matches = {
444                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
445                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
446                 },
447                 .driver_data = &quirk_acer_travelmate_2490,
448         },
449         {
450                 .callback = dmi_matched,
451                 .ident = "Acer TravelMate 2490",
452                 .matches = {
453                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
454                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
455                 },
456                 .driver_data = &quirk_acer_travelmate_2490,
457         },
458         {
459                 .callback = dmi_matched,
460                 .ident = "Acer TravelMate 4200",
461                 .matches = {
462                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
463                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
464                 },
465                 .driver_data = &quirk_acer_travelmate_2490,
466         },
467         {
468                 .callback = dmi_matched,
469                 .ident = "Fujitsu Siemens Amilo Li 1718",
470                 .matches = {
471                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
472                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
473                 },
474                 .driver_data = &quirk_fujitsu_amilo_li_1718,
475         },
476         {
477                 .callback = dmi_matched,
478                 .ident = "Medion MD 98300",
479                 .matches = {
480                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
481                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
482                 },
483                 .driver_data = &quirk_medion_md_98300,
484         },
485         {
486                 .callback = dmi_matched,
487                 .ident = "Lenovo Ideapad S205",
488                 .matches = {
489                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
490                         DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
491                 },
492                 .driver_data = &quirk_lenovo_ideapad_s205,
493         },
494         {
495                 .callback = dmi_matched,
496                 .ident = "Lenovo Ideapad S205 (Brazos)",
497                 .matches = {
498                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
499                         DMI_MATCH(DMI_PRODUCT_NAME, "Brazos"),
500                 },
501                 .driver_data = &quirk_lenovo_ideapad_s205,
502         },
503         {
504                 .callback = dmi_matched,
505                 .ident = "Lenovo 3000 N200",
506                 .matches = {
507                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
508                         DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
509                 },
510                 .driver_data = &quirk_fujitsu_amilo_li_1718,
511         },
512         {
513                 .callback = dmi_matched,
514                 .ident = "Lenovo Ideapad S205-10382JG",
515                 .matches = {
516                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
517                         DMI_MATCH(DMI_PRODUCT_NAME, "10382JG"),
518                 },
519                 .driver_data = &quirk_lenovo_ideapad_s205,
520         },
521         {
522                 .callback = dmi_matched,
523                 .ident = "Lenovo Ideapad S205-1038DPG",
524                 .matches = {
525                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
526                         DMI_MATCH(DMI_PRODUCT_NAME, "1038DPG"),
527                 },
528                 .driver_data = &quirk_lenovo_ideapad_s205,
529         },
530         {}
531 };
532 
533 static int __init
534 video_set_backlight_video_vendor(const struct dmi_system_id *d)
535 {
536         interface->capability &= ~ACER_CAP_BRIGHTNESS;
537         pr_info("Brightness must be controlled by generic video driver\n");
538         return 0;
539 }
540 
541 static const struct dmi_system_id video_vendor_dmi_table[] __initconst = {
542         {
543                 .callback = video_set_backlight_video_vendor,
544                 .ident = "Acer TravelMate 4750",
545                 .matches = {
546                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
547                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
548                 },
549         },
550         {
551                 .callback = video_set_backlight_video_vendor,
552                 .ident = "Acer Extensa 5235",
553                 .matches = {
554                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
555                         DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
556                 },
557         },
558         {
559                 .callback = video_set_backlight_video_vendor,
560                 .ident = "Acer TravelMate 5760",
561                 .matches = {
562                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
563                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
564                 },
565         },
566         {
567                 .callback = video_set_backlight_video_vendor,
568                 .ident = "Acer Aspire 5750",
569                 .matches = {
570                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
571                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
572                 },
573         },
574         {
575                 .callback = video_set_backlight_video_vendor,
576                 .ident = "Acer Aspire 5741",
577                 .matches = {
578                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
579                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
580                 },
581         },
582         {
583                 /*
584                  * Note no video_set_backlight_video_vendor, we must use the
585                  * acer interface, as there is no native backlight interface.
586                  */
587                 .ident = "Acer KAV80",
588                 .matches = {
589                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
590                         DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"),
591                 },
592         },
593         {}
594 };
595 
596 /* Find which quirks are needed for a particular vendor/ model pair */
597 static void __init find_quirks(void)
598 {
599         if (!force_series) {
600                 dmi_check_system(acer_quirks);
601         } else if (force_series == 2490) {
602                 quirks = &quirk_acer_travelmate_2490;
603         }
604 
605         if (quirks == NULL)
606                 quirks = &quirk_unknown;
607 
608         set_quirks();
609 }
610 
611 /*
612  * General interface convenience methods
613  */
614 
615 static bool has_cap(u32 cap)
616 {
617         if ((interface->capability & cap) != 0)
618                 return 1;
619 
620         return 0;
621 }
622 
623 /*
624  * AMW0 (V1) interface
625  */
626 struct wmab_args {
627         u32 eax;
628         u32 ebx;
629         u32 ecx;
630         u32 edx;
631 };
632 
633 struct wmab_ret {
634         u32 eax;
635         u32 ebx;
636         u32 ecx;
637         u32 edx;
638         u32 eex;
639 };
640 
641 static acpi_status wmab_execute(struct wmab_args *regbuf,
642 struct acpi_buffer *result)
643 {
644         struct acpi_buffer input;
645         acpi_status status;
646         input.length = sizeof(struct wmab_args);
647         input.pointer = (u8 *)regbuf;
648 
649         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
650 
651         return status;
652 }
653 
654 static acpi_status AMW0_get_u32(u32 *value, u32 cap)
655 {
656         int err;
657         u8 result;
658 
659         switch (cap) {
660         case ACER_CAP_MAILLED:
661                 switch (quirks->mailled) {
662                 default:
663                         err = ec_read(0xA, &result);
664                         if (err)
665                                 return AE_ERROR;
666                         *value = (result >> 7) & 0x1;
667                         return AE_OK;
668                 }
669                 break;
670         case ACER_CAP_WIRELESS:
671                 switch (quirks->wireless) {
672                 case 1:
673                         err = ec_read(0x7B, &result);
674                         if (err)
675                                 return AE_ERROR;
676                         *value = result & 0x1;
677                         return AE_OK;
678                 case 2:
679                         err = ec_read(0x71, &result);
680                         if (err)
681                                 return AE_ERROR;
682                         *value = result & 0x1;
683                         return AE_OK;
684                 case 3:
685                         err = ec_read(0x78, &result);
686                         if (err)
687                                 return AE_ERROR;
688                         *value = result & 0x1;
689                         return AE_OK;
690                 default:
691                         err = ec_read(0xA, &result);
692                         if (err)
693                                 return AE_ERROR;
694                         *value = (result >> 2) & 0x1;
695                         return AE_OK;
696                 }
697                 break;
698         case ACER_CAP_BLUETOOTH:
699                 switch (quirks->bluetooth) {
700                 default:
701                         err = ec_read(0xA, &result);
702                         if (err)
703                                 return AE_ERROR;
704                         *value = (result >> 4) & 0x1;
705                         return AE_OK;
706                 }
707                 break;
708         case ACER_CAP_BRIGHTNESS:
709                 switch (quirks->brightness) {
710                 default:
711                         err = ec_read(0x83, &result);
712                         if (err)
713                                 return AE_ERROR;
714                         *value = result;
715                         return AE_OK;
716                 }
717                 break;
718         default:
719                 return AE_ERROR;
720         }
721         return AE_OK;
722 }
723 
724 static acpi_status AMW0_set_u32(u32 value, u32 cap)
725 {
726         struct wmab_args args;
727 
728         args.eax = ACER_AMW0_WRITE;
729         args.ebx = value ? (1<<8) : 0;
730         args.ecx = args.edx = 0;
731 
732         switch (cap) {
733         case ACER_CAP_MAILLED:
734                 if (value > 1)
735                         return AE_BAD_PARAMETER;
736                 args.ebx |= ACER_AMW0_MAILLED_MASK;
737                 break;
738         case ACER_CAP_WIRELESS:
739                 if (value > 1)
740                         return AE_BAD_PARAMETER;
741                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
742                 break;
743         case ACER_CAP_BLUETOOTH:
744                 if (value > 1)
745                         return AE_BAD_PARAMETER;
746                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
747                 break;
748         case ACER_CAP_BRIGHTNESS:
749                 if (value > max_brightness)
750                         return AE_BAD_PARAMETER;
751                 switch (quirks->brightness) {
752                 default:
753                         return ec_write(0x83, value);
754                         break;
755                 }
756         default:
757                 return AE_ERROR;
758         }
759 
760         /* Actually do the set */
761         return wmab_execute(&args, NULL);
762 }
763 
764 static acpi_status __init AMW0_find_mailled(void)
765 {
766         struct wmab_args args;
767         struct wmab_ret ret;
768         acpi_status status = AE_OK;
769         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
770         union acpi_object *obj;
771 
772         args.eax = 0x86;
773         args.ebx = args.ecx = args.edx = 0;
774 
775         status = wmab_execute(&args, &out);
776         if (ACPI_FAILURE(status))
777                 return status;
778 
779         obj = (union acpi_object *) out.pointer;
780         if (obj && obj->type == ACPI_TYPE_BUFFER &&
781         obj->buffer.length == sizeof(struct wmab_ret)) {
782                 ret = *((struct wmab_ret *) obj->buffer.pointer);
783         } else {
784                 kfree(out.pointer);
785                 return AE_ERROR;
786         }
787 
788         if (ret.eex & 0x1)
789                 interface->capability |= ACER_CAP_MAILLED;
790 
791         kfree(out.pointer);
792 
793         return AE_OK;
794 }
795 
796 static const struct acpi_device_id norfkill_ids[] __initconst = {
797         { "VPC2004", 0},
798         { "IBM0068", 0},
799         { "LEN0068", 0},
800         { "SNY5001", 0},        /* sony-laptop in charge */
801         { "HPQ6601", 0},
802         { "", 0},
803 };
804 
805 static int __init AMW0_set_cap_acpi_check_device(void)
806 {
807         const struct acpi_device_id *id;
808 
809         for (id = norfkill_ids; id->id[0]; id++)
810                 if (acpi_dev_found(id->id))
811                         return true;
812 
813         return false;
814 }
815 
816 static acpi_status __init AMW0_set_capabilities(void)
817 {
818         struct wmab_args args;
819         struct wmab_ret ret;
820         acpi_status status;
821         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
822         union acpi_object *obj;
823 
824         /*
825          * On laptops with this strange GUID (non Acer), normal probing doesn't
826          * work.
827          */
828         if (wmi_has_guid(AMW0_GUID2)) {
829                 if ((quirks != &quirk_unknown) ||
830                     !AMW0_set_cap_acpi_check_device())
831                         interface->capability |= ACER_CAP_WIRELESS;
832                 return AE_OK;
833         }
834 
835         args.eax = ACER_AMW0_WRITE;
836         args.ecx = args.edx = 0;
837 
838         args.ebx = 0xa2 << 8;
839         args.ebx |= ACER_AMW0_WIRELESS_MASK;
840 
841         status = wmab_execute(&args, &out);
842         if (ACPI_FAILURE(status))
843                 return status;
844 
845         obj = out.pointer;
846         if (obj && obj->type == ACPI_TYPE_BUFFER &&
847         obj->buffer.length == sizeof(struct wmab_ret)) {
848                 ret = *((struct wmab_ret *) obj->buffer.pointer);
849         } else {
850                 status = AE_ERROR;
851                 goto out;
852         }
853 
854         if (ret.eax & 0x1)
855                 interface->capability |= ACER_CAP_WIRELESS;
856 
857         args.ebx = 2 << 8;
858         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
859 
860         /*
861          * It's ok to use existing buffer for next wmab_execute call.
862          * But we need to kfree(out.pointer) if next wmab_execute fail.
863          */
864         status = wmab_execute(&args, &out);
865         if (ACPI_FAILURE(status))
866                 goto out;
867 
868         obj = (union acpi_object *) out.pointer;
869         if (obj && obj->type == ACPI_TYPE_BUFFER
870         && obj->buffer.length == sizeof(struct wmab_ret)) {
871                 ret = *((struct wmab_ret *) obj->buffer.pointer);
872         } else {
873                 status = AE_ERROR;
874                 goto out;
875         }
876 
877         if (ret.eax & 0x1)
878                 interface->capability |= ACER_CAP_BLUETOOTH;
879 
880         /*
881          * This appears to be safe to enable, since all Wistron based laptops
882          * appear to use the same EC register for brightness, even if they
883          * differ for wireless, etc
884          */
885         if (quirks->brightness >= 0)
886                 interface->capability |= ACER_CAP_BRIGHTNESS;
887 
888         status = AE_OK;
889 out:
890         kfree(out.pointer);
891         return status;
892 }
893 
894 static struct wmi_interface AMW0_interface = {
895         .type = ACER_AMW0,
896 };
897 
898 static struct wmi_interface AMW0_V2_interface = {
899         .type = ACER_AMW0_V2,
900 };
901 
902 /*
903  * New interface (The WMID interface)
904  */
905 static acpi_status
906 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
907 {
908         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
909         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
910         union acpi_object *obj;
911         u32 tmp = 0;
912         acpi_status status;
913 
914         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
915 
916         if (ACPI_FAILURE(status))
917                 return status;
918 
919         obj = (union acpi_object *) result.pointer;
920         if (obj) {
921                 if (obj->type == ACPI_TYPE_BUFFER &&
922                         (obj->buffer.length == sizeof(u32) ||
923                         obj->buffer.length == sizeof(u64))) {
924                         tmp = *((u32 *) obj->buffer.pointer);
925                 } else if (obj->type == ACPI_TYPE_INTEGER) {
926                         tmp = (u32) obj->integer.value;
927                 }
928         }
929 
930         if (out)
931                 *out = tmp;
932 
933         kfree(result.pointer);
934 
935         return status;
936 }
937 
938 static acpi_status WMID_get_u32(u32 *value, u32 cap)
939 {
940         acpi_status status;
941         u8 tmp;
942         u32 result, method_id = 0;
943 
944         switch (cap) {
945         case ACER_CAP_WIRELESS:
946                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
947                 break;
948         case ACER_CAP_BLUETOOTH:
949                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
950                 break;
951         case ACER_CAP_BRIGHTNESS:
952                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
953                 break;
954         case ACER_CAP_THREEG:
955                 method_id = ACER_WMID_GET_THREEG_METHODID;
956                 break;
957         case ACER_CAP_MAILLED:
958                 if (quirks->mailled == 1) {
959                         ec_read(0x9f, &tmp);
960                         *value = tmp & 0x1;
961                         return 0;
962                 }
963         default:
964                 return AE_ERROR;
965         }
966         status = WMI_execute_u32(method_id, 0, &result);
967 
968         if (ACPI_SUCCESS(status))
969                 *value = (u8)result;
970 
971         return status;
972 }
973 
974 static acpi_status WMID_set_u32(u32 value, u32 cap)
975 {
976         u32 method_id = 0;
977         char param;
978 
979         switch (cap) {
980         case ACER_CAP_BRIGHTNESS:
981                 if (value > max_brightness)
982                         return AE_BAD_PARAMETER;
983                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
984                 break;
985         case ACER_CAP_WIRELESS:
986                 if (value > 1)
987                         return AE_BAD_PARAMETER;
988                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
989                 break;
990         case ACER_CAP_BLUETOOTH:
991                 if (value > 1)
992                         return AE_BAD_PARAMETER;
993                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
994                 break;
995         case ACER_CAP_THREEG:
996                 if (value > 1)
997                         return AE_BAD_PARAMETER;
998                 method_id = ACER_WMID_SET_THREEG_METHODID;
999                 break;
1000         case ACER_CAP_MAILLED:
1001                 if (value > 1)
1002                         return AE_BAD_PARAMETER;
1003                 if (quirks->mailled == 1) {
1004                         param = value ? 0x92 : 0x93;
1005                         i8042_lock_chip();
1006                         i8042_command(&param, 0x1059);
1007                         i8042_unlock_chip();
1008                         return 0;
1009                 }
1010                 break;
1011         default:
1012                 return AE_ERROR;
1013         }
1014         return WMI_execute_u32(method_id, (u32)value, NULL);
1015 }
1016 
1017 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1018 {
1019         struct wmid3_gds_return_value return_value;
1020         acpi_status status;
1021         union acpi_object *obj;
1022         struct wmid3_gds_get_input_param params = {
1023                 .function_num = 0x1,
1024                 .hotkey_number = commun_fn_key_number,
1025                 .devices = device,
1026         };
1027         struct acpi_buffer input = {
1028                 sizeof(struct wmid3_gds_get_input_param),
1029                 &params
1030         };
1031         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1032 
1033         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1034         if (ACPI_FAILURE(status))
1035                 return status;
1036 
1037         obj = output.pointer;
1038 
1039         if (!obj)
1040                 return AE_ERROR;
1041         else if (obj->type != ACPI_TYPE_BUFFER) {
1042                 kfree(obj);
1043                 return AE_ERROR;
1044         }
1045         if (obj->buffer.length != 8) {
1046                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1047                 kfree(obj);
1048                 return AE_ERROR;
1049         }
1050 
1051         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1052         kfree(obj);
1053 
1054         if (return_value.error_code || return_value.ec_return_value)
1055                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
1056                         device,
1057                         return_value.error_code,
1058                         return_value.ec_return_value);
1059         else
1060                 *value = !!(return_value.devices & device);
1061 
1062         return status;
1063 }
1064 
1065 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
1066 {
1067         u16 device;
1068 
1069         switch (cap) {
1070         case ACER_CAP_WIRELESS:
1071                 device = ACER_WMID3_GDS_WIRELESS;
1072                 break;
1073         case ACER_CAP_BLUETOOTH:
1074                 device = ACER_WMID3_GDS_BLUETOOTH;
1075                 break;
1076         case ACER_CAP_THREEG:
1077                 device = ACER_WMID3_GDS_THREEG;
1078                 break;
1079         default:
1080                 return AE_ERROR;
1081         }
1082         return wmid3_get_device_status(value, device);
1083 }
1084 
1085 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1086 {
1087         struct wmid3_gds_return_value return_value;
1088         acpi_status status;
1089         union acpi_object *obj;
1090         u16 devices;
1091         struct wmid3_gds_get_input_param get_params = {
1092                 .function_num = 0x1,
1093                 .hotkey_number = commun_fn_key_number,
1094                 .devices = commun_func_bitmap,
1095         };
1096         struct acpi_buffer get_input = {
1097                 sizeof(struct wmid3_gds_get_input_param),
1098                 &get_params
1099         };
1100         struct wmid3_gds_set_input_param set_params = {
1101                 .function_num = 0x2,
1102                 .hotkey_number = commun_fn_key_number,
1103                 .devices = commun_func_bitmap,
1104         };
1105         struct acpi_buffer set_input = {
1106                 sizeof(struct wmid3_gds_set_input_param),
1107                 &set_params
1108         };
1109         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1110         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1111 
1112         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
1113         if (ACPI_FAILURE(status))
1114                 return status;
1115 
1116         obj = output.pointer;
1117 
1118         if (!obj)
1119                 return AE_ERROR;
1120         else if (obj->type != ACPI_TYPE_BUFFER) {
1121                 kfree(obj);
1122                 return AE_ERROR;
1123         }
1124         if (obj->buffer.length != 8) {
1125                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1126                 kfree(obj);
1127                 return AE_ERROR;
1128         }
1129 
1130         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1131         kfree(obj);
1132 
1133         if (return_value.error_code || return_value.ec_return_value) {
1134                 pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1135                         return_value.error_code,
1136                         return_value.ec_return_value);
1137                 return status;
1138         }
1139 
1140         devices = return_value.devices;
1141         set_params.devices = (value) ? (devices | device) : (devices & ~device);
1142 
1143         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
1144         if (ACPI_FAILURE(status))
1145                 return status;
1146 
1147         obj = output2.pointer;
1148 
1149         if (!obj)
1150                 return AE_ERROR;
1151         else if (obj->type != ACPI_TYPE_BUFFER) {
1152                 kfree(obj);
1153                 return AE_ERROR;
1154         }
1155         if (obj->buffer.length != 4) {
1156                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1157                 kfree(obj);
1158                 return AE_ERROR;
1159         }
1160 
1161         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1162         kfree(obj);
1163 
1164         if (return_value.error_code || return_value.ec_return_value)
1165                 pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1166                         return_value.error_code,
1167                         return_value.ec_return_value);
1168 
1169         return status;
1170 }
1171 
1172 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1173 {
1174         u16 device;
1175 
1176         switch (cap) {
1177         case ACER_CAP_WIRELESS:
1178                 device = ACER_WMID3_GDS_WIRELESS;
1179                 break;
1180         case ACER_CAP_BLUETOOTH:
1181                 device = ACER_WMID3_GDS_BLUETOOTH;
1182                 break;
1183         case ACER_CAP_THREEG:
1184                 device = ACER_WMID3_GDS_THREEG;
1185                 break;
1186         default:
1187                 return AE_ERROR;
1188         }
1189         return wmid3_set_device_status(value, device);
1190 }
1191 
1192 static void __init type_aa_dmi_decode(const struct dmi_header *header, void *d)
1193 {
1194         struct hotkey_function_type_aa *type_aa;
1195 
1196         /* We are looking for OEM-specific Type AAh */
1197         if (header->type != 0xAA)
1198                 return;
1199 
1200         has_type_aa = true;
1201         type_aa = (struct hotkey_function_type_aa *) header;
1202 
1203         pr_info("Function bitmap for Communication Button: 0x%x\n",
1204                 type_aa->commun_func_bitmap);
1205         commun_func_bitmap = type_aa->commun_func_bitmap;
1206 
1207         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1208                 interface->capability |= ACER_CAP_WIRELESS;
1209         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1210                 interface->capability |= ACER_CAP_THREEG;
1211         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1212                 interface->capability |= ACER_CAP_BLUETOOTH;
1213 
1214         commun_fn_key_number = type_aa->commun_fn_key_number;
1215 }
1216 
1217 static acpi_status __init WMID_set_capabilities(void)
1218 {
1219         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1220         union acpi_object *obj;
1221         acpi_status status;
1222         u32 devices;
1223 
1224         status = wmi_query_block(WMID_GUID2, 1, &out);
1225         if (ACPI_FAILURE(status))
1226                 return status;
1227 
1228         obj = (union acpi_object *) out.pointer;
1229         if (obj) {
1230                 if (obj->type == ACPI_TYPE_BUFFER &&
1231                         (obj->buffer.length == sizeof(u32) ||
1232                         obj->buffer.length == sizeof(u64))) {
1233                         devices = *((u32 *) obj->buffer.pointer);
1234                 } else if (obj->type == ACPI_TYPE_INTEGER) {
1235                         devices = (u32) obj->integer.value;
1236                 } else {
1237                         kfree(out.pointer);
1238                         return AE_ERROR;
1239                 }
1240         } else {
1241                 kfree(out.pointer);
1242                 return AE_ERROR;
1243         }
1244 
1245         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1246         if (devices & 0x07)
1247                 interface->capability |= ACER_CAP_WIRELESS;
1248         if (devices & 0x40)
1249                 interface->capability |= ACER_CAP_THREEG;
1250         if (devices & 0x10)
1251                 interface->capability |= ACER_CAP_BLUETOOTH;
1252 
1253         if (!(devices & 0x20))
1254                 max_brightness = 0x9;
1255 
1256         kfree(out.pointer);
1257         return status;
1258 }
1259 
1260 static struct wmi_interface wmid_interface = {
1261         .type = ACER_WMID,
1262 };
1263 
1264 static struct wmi_interface wmid_v2_interface = {
1265         .type = ACER_WMID_v2,
1266 };
1267 
1268 /*
1269  * Generic Device (interface-independent)
1270  */
1271 
1272 static acpi_status get_u32(u32 *value, u32 cap)
1273 {
1274         acpi_status status = AE_ERROR;
1275 
1276         switch (interface->type) {
1277         case ACER_AMW0:
1278                 status = AMW0_get_u32(value, cap);
1279                 break;
1280         case ACER_AMW0_V2:
1281                 if (cap == ACER_CAP_MAILLED) {
1282                         status = AMW0_get_u32(value, cap);
1283                         break;
1284                 }
1285         case ACER_WMID:
1286                 status = WMID_get_u32(value, cap);
1287                 break;
1288         case ACER_WMID_v2:
1289                 if (cap & (ACER_CAP_WIRELESS |
1290                            ACER_CAP_BLUETOOTH |
1291                            ACER_CAP_THREEG))
1292                         status = wmid_v2_get_u32(value, cap);
1293                 else if (wmi_has_guid(WMID_GUID2))
1294                         status = WMID_get_u32(value, cap);
1295                 break;
1296         }
1297 
1298         return status;
1299 }
1300 
1301 static acpi_status set_u32(u32 value, u32 cap)
1302 {
1303         acpi_status status;
1304 
1305         if (interface->capability & cap) {
1306                 switch (interface->type) {
1307                 case ACER_AMW0:
1308                         return AMW0_set_u32(value, cap);
1309                 case ACER_AMW0_V2:
1310                         if (cap == ACER_CAP_MAILLED)
1311                                 return AMW0_set_u32(value, cap);
1312 
1313                         /*
1314                          * On some models, some WMID methods don't toggle
1315                          * properly. For those cases, we want to run the AMW0
1316                          * method afterwards to be certain we've really toggled
1317                          * the device state.
1318                          */
1319                         if (cap == ACER_CAP_WIRELESS ||
1320                                 cap == ACER_CAP_BLUETOOTH) {
1321                                 status = WMID_set_u32(value, cap);
1322                                 if (ACPI_FAILURE(status))
1323                                         return status;
1324 
1325                                 return AMW0_set_u32(value, cap);
1326                         }
1327                 case ACER_WMID:
1328                         return WMID_set_u32(value, cap);
1329                 case ACER_WMID_v2:
1330                         if (cap & (ACER_CAP_WIRELESS |
1331                                    ACER_CAP_BLUETOOTH |
1332                                    ACER_CAP_THREEG))
1333                                 return wmid_v2_set_u32(value, cap);
1334                         else if (wmi_has_guid(WMID_GUID2))
1335                                 return WMID_set_u32(value, cap);
1336                 default:
1337                         return AE_BAD_PARAMETER;
1338                 }
1339         }
1340         return AE_BAD_PARAMETER;
1341 }
1342 
1343 static void __init acer_commandline_init(void)
1344 {
1345         /*
1346          * These will all fail silently if the value given is invalid, or the
1347          * capability isn't available on the given interface
1348          */
1349         if (mailled >= 0)
1350                 set_u32(mailled, ACER_CAP_MAILLED);
1351         if (!has_type_aa && threeg >= 0)
1352                 set_u32(threeg, ACER_CAP_THREEG);
1353         if (brightness >= 0)
1354                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1355 }
1356 
1357 /*
1358  * LED device (Mail LED only, no other LEDs known yet)
1359  */
1360 static void mail_led_set(struct led_classdev *led_cdev,
1361 enum led_brightness value)
1362 {
1363         set_u32(value, ACER_CAP_MAILLED);
1364 }
1365 
1366 static struct led_classdev mail_led = {
1367         .name = "acer-wmi::mail",
1368         .brightness_set = mail_led_set,
1369 };
1370 
1371 static int acer_led_init(struct device *dev)
1372 {
1373         return led_classdev_register(dev, &mail_led);
1374 }
1375 
1376 static void acer_led_exit(void)
1377 {
1378         set_u32(LED_OFF, ACER_CAP_MAILLED);
1379         led_classdev_unregister(&mail_led);
1380 }
1381 
1382 /*
1383  * Backlight device
1384  */
1385 static struct backlight_device *acer_backlight_device;
1386 
1387 static int read_brightness(struct backlight_device *bd)
1388 {
1389         u32 value;
1390         get_u32(&value, ACER_CAP_BRIGHTNESS);
1391         return value;
1392 }
1393 
1394 static int update_bl_status(struct backlight_device *bd)
1395 {
1396         int intensity = bd->props.brightness;
1397 
1398         if (bd->props.power != FB_BLANK_UNBLANK)
1399                 intensity = 0;
1400         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1401                 intensity = 0;
1402 
1403         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1404 
1405         return 0;
1406 }
1407 
1408 static const struct backlight_ops acer_bl_ops = {
1409         .get_brightness = read_brightness,
1410         .update_status = update_bl_status,
1411 };
1412 
1413 static int acer_backlight_init(struct device *dev)
1414 {
1415         struct backlight_properties props;
1416         struct backlight_device *bd;
1417 
1418         memset(&props, 0, sizeof(struct backlight_properties));
1419         props.type = BACKLIGHT_PLATFORM;
1420         props.max_brightness = max_brightness;
1421         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1422                                        &props);
1423         if (IS_ERR(bd)) {
1424                 pr_err("Could not register Acer backlight device\n");
1425                 acer_backlight_device = NULL;
1426                 return PTR_ERR(bd);
1427         }
1428 
1429         acer_backlight_device = bd;
1430 
1431         bd->props.power = FB_BLANK_UNBLANK;
1432         bd->props.brightness = read_brightness(bd);
1433         backlight_update_status(bd);
1434         return 0;
1435 }
1436 
1437 static void acer_backlight_exit(void)
1438 {
1439         backlight_device_unregister(acer_backlight_device);
1440 }
1441 
1442 /*
1443  * Accelerometer device
1444  */
1445 static acpi_handle gsensor_handle;
1446 
1447 static int acer_gsensor_init(void)
1448 {
1449         acpi_status status;
1450         struct acpi_buffer output;
1451         union acpi_object out_obj;
1452 
1453         output.length = sizeof(out_obj);
1454         output.pointer = &out_obj;
1455         status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
1456         if (ACPI_FAILURE(status))
1457                 return -1;
1458 
1459         return 0;
1460 }
1461 
1462 static int acer_gsensor_open(struct input_dev *input)
1463 {
1464         return acer_gsensor_init();
1465 }
1466 
1467 static int acer_gsensor_event(void)
1468 {
1469         acpi_status status;
1470         struct acpi_buffer output;
1471         union acpi_object out_obj[5];
1472 
1473         if (!has_cap(ACER_CAP_ACCEL))
1474                 return -1;
1475 
1476         output.length = sizeof(out_obj);
1477         output.pointer = out_obj;
1478 
1479         status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
1480         if (ACPI_FAILURE(status))
1481                 return -1;
1482 
1483         if (out_obj->package.count != 4)
1484                 return -1;
1485 
1486         input_report_abs(acer_wmi_accel_dev, ABS_X,
1487                 (s16)out_obj->package.elements[0].integer.value);
1488         input_report_abs(acer_wmi_accel_dev, ABS_Y,
1489                 (s16)out_obj->package.elements[1].integer.value);
1490         input_report_abs(acer_wmi_accel_dev, ABS_Z,
1491                 (s16)out_obj->package.elements[2].integer.value);
1492         input_sync(acer_wmi_accel_dev);
1493         return 0;
1494 }
1495 
1496 /*
1497  * Rfkill devices
1498  */
1499 static void acer_rfkill_update(struct work_struct *ignored);
1500 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1501 static void acer_rfkill_update(struct work_struct *ignored)
1502 {
1503         u32 state;
1504         acpi_status status;
1505 
1506         if (has_cap(ACER_CAP_WIRELESS)) {
1507                 status = get_u32(&state, ACER_CAP_WIRELESS);
1508                 if (ACPI_SUCCESS(status)) {
1509                         if (quirks->wireless == 3)
1510                                 rfkill_set_hw_state(wireless_rfkill, !state);
1511                         else
1512                                 rfkill_set_sw_state(wireless_rfkill, !state);
1513                 }
1514         }
1515 
1516         if (has_cap(ACER_CAP_BLUETOOTH)) {
1517                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1518                 if (ACPI_SUCCESS(status))
1519                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1520         }
1521 
1522         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1523                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1524                 if (ACPI_SUCCESS(status))
1525                         rfkill_set_sw_state(threeg_rfkill, !state);
1526         }
1527 
1528         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1529 }
1530 
1531 static int acer_rfkill_set(void *data, bool blocked)
1532 {
1533         acpi_status status;
1534         u32 cap = (unsigned long)data;
1535 
1536         if (rfkill_inited) {
1537                 status = set_u32(!blocked, cap);
1538                 if (ACPI_FAILURE(status))
1539                         return -ENODEV;
1540         }
1541 
1542         return 0;
1543 }
1544 
1545 static const struct rfkill_ops acer_rfkill_ops = {
1546         .set_block = acer_rfkill_set,
1547 };
1548 
1549 static struct rfkill *acer_rfkill_register(struct device *dev,
1550                                            enum rfkill_type type,
1551                                            char *name, u32 cap)
1552 {
1553         int err;
1554         struct rfkill *rfkill_dev;
1555         u32 state;
1556         acpi_status status;
1557 
1558         rfkill_dev = rfkill_alloc(name, dev, type,
1559                                   &acer_rfkill_ops,
1560                                   (void *)(unsigned long)cap);
1561         if (!rfkill_dev)
1562                 return ERR_PTR(-ENOMEM);
1563 
1564         status = get_u32(&state, cap);
1565 
1566         err = rfkill_register(rfkill_dev);
1567         if (err) {
1568                 rfkill_destroy(rfkill_dev);
1569                 return ERR_PTR(err);
1570         }
1571 
1572         if (ACPI_SUCCESS(status))
1573                 rfkill_set_sw_state(rfkill_dev, !state);
1574 
1575         return rfkill_dev;
1576 }
1577 
1578 static int acer_rfkill_init(struct device *dev)
1579 {
1580         int err;
1581 
1582         if (has_cap(ACER_CAP_WIRELESS)) {
1583                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1584                         "acer-wireless", ACER_CAP_WIRELESS);
1585                 if (IS_ERR(wireless_rfkill)) {
1586                         err = PTR_ERR(wireless_rfkill);
1587                         goto error_wireless;
1588                 }
1589         }
1590 
1591         if (has_cap(ACER_CAP_BLUETOOTH)) {
1592                 bluetooth_rfkill = acer_rfkill_register(dev,
1593                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1594                         ACER_CAP_BLUETOOTH);
1595                 if (IS_ERR(bluetooth_rfkill)) {
1596                         err = PTR_ERR(bluetooth_rfkill);
1597                         goto error_bluetooth;
1598                 }
1599         }
1600 
1601         if (has_cap(ACER_CAP_THREEG)) {
1602                 threeg_rfkill = acer_rfkill_register(dev,
1603                         RFKILL_TYPE_WWAN, "acer-threeg",
1604                         ACER_CAP_THREEG);
1605                 if (IS_ERR(threeg_rfkill)) {
1606                         err = PTR_ERR(threeg_rfkill);
1607                         goto error_threeg;
1608                 }
1609         }
1610 
1611         rfkill_inited = true;
1612 
1613         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1614             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1615                 schedule_delayed_work(&acer_rfkill_work,
1616                         round_jiffies_relative(HZ));
1617 
1618         return 0;
1619 
1620 error_threeg:
1621         if (has_cap(ACER_CAP_BLUETOOTH)) {
1622                 rfkill_unregister(bluetooth_rfkill);
1623                 rfkill_destroy(bluetooth_rfkill);
1624         }
1625 error_bluetooth:
1626         if (has_cap(ACER_CAP_WIRELESS)) {
1627                 rfkill_unregister(wireless_rfkill);
1628                 rfkill_destroy(wireless_rfkill);
1629         }
1630 error_wireless:
1631         return err;
1632 }
1633 
1634 static void acer_rfkill_exit(void)
1635 {
1636         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1637             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1638                 cancel_delayed_work_sync(&acer_rfkill_work);
1639 
1640         if (has_cap(ACER_CAP_WIRELESS)) {
1641                 rfkill_unregister(wireless_rfkill);
1642                 rfkill_destroy(wireless_rfkill);
1643         }
1644 
1645         if (has_cap(ACER_CAP_BLUETOOTH)) {
1646                 rfkill_unregister(bluetooth_rfkill);
1647                 rfkill_destroy(bluetooth_rfkill);
1648         }
1649 
1650         if (has_cap(ACER_CAP_THREEG)) {
1651                 rfkill_unregister(threeg_rfkill);
1652                 rfkill_destroy(threeg_rfkill);
1653         }
1654         return;
1655 }
1656 
1657 static void acer_wmi_notify(u32 value, void *context)
1658 {
1659         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1660         union acpi_object *obj;
1661         struct event_return_value return_value;
1662         acpi_status status;
1663         u16 device_state;
1664         const struct key_entry *key;
1665         u32 scancode;
1666 
1667         status = wmi_get_event_data(value, &response);
1668         if (status != AE_OK) {
1669                 pr_warn("bad event status 0x%x\n", status);
1670                 return;
1671         }
1672 
1673         obj = (union acpi_object *)response.pointer;
1674 
1675         if (!obj)
1676                 return;
1677         if (obj->type != ACPI_TYPE_BUFFER) {
1678                 pr_warn("Unknown response received %d\n", obj->type);
1679                 kfree(obj);
1680                 return;
1681         }
1682         if (obj->buffer.length != 8) {
1683                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1684                 kfree(obj);
1685                 return;
1686         }
1687 
1688         return_value = *((struct event_return_value *)obj->buffer.pointer);
1689         kfree(obj);
1690 
1691         switch (return_value.function) {
1692         case WMID_HOTKEY_EVENT:
1693                 device_state = return_value.device_state;
1694                 pr_debug("device state: 0x%x\n", device_state);
1695 
1696                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1697                                                         return_value.key_num);
1698                 if (!key) {
1699                         pr_warn("Unknown key number - 0x%x\n",
1700                                 return_value.key_num);
1701                 } else {
1702                         scancode = return_value.key_num;
1703                         switch (key->keycode) {
1704                         case KEY_WLAN:
1705                         case KEY_BLUETOOTH:
1706                                 if (has_cap(ACER_CAP_WIRELESS))
1707                                         rfkill_set_sw_state(wireless_rfkill,
1708                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1709                                 if (has_cap(ACER_CAP_THREEG))
1710                                         rfkill_set_sw_state(threeg_rfkill,
1711                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1712                                 if (has_cap(ACER_CAP_BLUETOOTH))
1713                                         rfkill_set_sw_state(bluetooth_rfkill,
1714                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1715                                 break;
1716                         case KEY_TOUCHPAD_TOGGLE:
1717                                 scancode = (device_state & ACER_WMID3_GDS_TOUCHPAD) ?
1718                                                 KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF;
1719                         }
1720                         sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
1721                 }
1722                 break;
1723         case WMID_ACCEL_EVENT:
1724                 acer_gsensor_event();
1725                 break;
1726         default:
1727                 pr_warn("Unknown function number - %d - %d\n",
1728                         return_value.function, return_value.key_num);
1729                 break;
1730         }
1731 }
1732 
1733 static acpi_status __init
1734 wmid3_set_lm_mode(struct lm_input_params *params,
1735                   struct lm_return_value *return_value)
1736 {
1737         acpi_status status;
1738         union acpi_object *obj;
1739 
1740         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1741         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1742 
1743         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1744         if (ACPI_FAILURE(status))
1745                 return status;
1746 
1747         obj = output.pointer;
1748 
1749         if (!obj)
1750                 return AE_ERROR;
1751         else if (obj->type != ACPI_TYPE_BUFFER) {
1752                 kfree(obj);
1753                 return AE_ERROR;
1754         }
1755         if (obj->buffer.length != 4) {
1756                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1757                 kfree(obj);
1758                 return AE_ERROR;
1759         }
1760 
1761         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1762         kfree(obj);
1763 
1764         return status;
1765 }
1766 
1767 static int __init acer_wmi_enable_ec_raw(void)
1768 {
1769         struct lm_return_value return_value;
1770         acpi_status status;
1771         struct lm_input_params params = {
1772                 .function_num = 0x1,
1773                 .commun_devices = 0xFFFF,
1774                 .devices = 0xFFFF,
1775                 .lm_status = 0x00,            /* Launch Manager Deactive */
1776         };
1777 
1778         status = wmid3_set_lm_mode(&params, &return_value);
1779 
1780         if (return_value.error_code || return_value.ec_return_value)
1781                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1782                         return_value.error_code,
1783                         return_value.ec_return_value);
1784         else
1785                 pr_info("Enabled EC raw mode\n");
1786 
1787         return status;
1788 }
1789 
1790 static int __init acer_wmi_enable_lm(void)
1791 {
1792         struct lm_return_value return_value;
1793         acpi_status status;
1794         struct lm_input_params params = {
1795                 .function_num = 0x1,
1796                 .commun_devices = 0xFFFF,
1797                 .devices = 0xFFFF,
1798                 .lm_status = 0x01,            /* Launch Manager Active */
1799         };
1800 
1801         status = wmid3_set_lm_mode(&params, &return_value);
1802 
1803         if (return_value.error_code || return_value.ec_return_value)
1804                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1805                         return_value.error_code,
1806                         return_value.ec_return_value);
1807 
1808         return status;
1809 }
1810 
1811 static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
1812                                                 void *ctx, void **retval)
1813 {
1814         *(acpi_handle *)retval = ah;
1815         return AE_OK;
1816 }
1817 
1818 static int __init acer_wmi_get_handle(const char *name, const char *prop,
1819                                         acpi_handle *ah)
1820 {
1821         acpi_status status;
1822         acpi_handle handle;
1823 
1824         BUG_ON(!name || !ah);
1825 
1826         handle = NULL;
1827         status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
1828                                         (void *)name, &handle);
1829 
1830         if (ACPI_SUCCESS(status)) {
1831                 *ah = handle;
1832                 return 0;
1833         } else {
1834                 return -ENODEV;
1835         }
1836 }
1837 
1838 static int __init acer_wmi_accel_setup(void)
1839 {
1840         int err;
1841 
1842         err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
1843         if (err)
1844                 return err;
1845 
1846         interface->capability |= ACER_CAP_ACCEL;
1847 
1848         acer_wmi_accel_dev = input_allocate_device();
1849         if (!acer_wmi_accel_dev)
1850                 return -ENOMEM;
1851 
1852         acer_wmi_accel_dev->open = acer_gsensor_open;
1853 
1854         acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
1855         acer_wmi_accel_dev->phys = "wmi/input1";
1856         acer_wmi_accel_dev->id.bustype = BUS_HOST;
1857         acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
1858         input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
1859         input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
1860         input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);
1861 
1862         err = input_register_device(acer_wmi_accel_dev);
1863         if (err)
1864                 goto err_free_dev;
1865 
1866         return 0;
1867 
1868 err_free_dev:
1869         input_free_device(acer_wmi_accel_dev);
1870         return err;
1871 }
1872 
1873 static void acer_wmi_accel_destroy(void)
1874 {
1875         input_unregister_device(acer_wmi_accel_dev);
1876 }
1877 
1878 static int __init acer_wmi_input_setup(void)
1879 {
1880         acpi_status status;
1881         int err;
1882 
1883         acer_wmi_input_dev = input_allocate_device();
1884         if (!acer_wmi_input_dev)
1885                 return -ENOMEM;
1886 
1887         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1888         acer_wmi_input_dev->phys = "wmi/input0";
1889         acer_wmi_input_dev->id.bustype = BUS_HOST;
1890 
1891         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1892         if (err)
1893                 goto err_free_dev;
1894 
1895         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1896                                                 acer_wmi_notify, NULL);
1897         if (ACPI_FAILURE(status)) {
1898                 err = -EIO;
1899                 goto err_free_keymap;
1900         }
1901 
1902         err = input_register_device(acer_wmi_input_dev);
1903         if (err)
1904                 goto err_uninstall_notifier;
1905 
1906         return 0;
1907 
1908 err_uninstall_notifier:
1909         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1910 err_free_keymap:
1911         sparse_keymap_free(acer_wmi_input_dev);
1912 err_free_dev:
1913         input_free_device(acer_wmi_input_dev);
1914         return err;
1915 }
1916 
1917 static void acer_wmi_input_destroy(void)
1918 {
1919         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1920         sparse_keymap_free(acer_wmi_input_dev);
1921         input_unregister_device(acer_wmi_input_dev);
1922 }
1923 
1924 /*
1925  * debugfs functions
1926  */
1927 static u32 get_wmid_devices(void)
1928 {
1929         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1930         union acpi_object *obj;
1931         acpi_status status;
1932         u32 devices = 0;
1933 
1934         status = wmi_query_block(WMID_GUID2, 1, &out);
1935         if (ACPI_FAILURE(status))
1936                 return 0;
1937 
1938         obj = (union acpi_object *) out.pointer;
1939         if (obj) {
1940                 if (obj->type == ACPI_TYPE_BUFFER &&
1941                         (obj->buffer.length == sizeof(u32) ||
1942                         obj->buffer.length == sizeof(u64))) {
1943                         devices = *((u32 *) obj->buffer.pointer);
1944                 } else if (obj->type == ACPI_TYPE_INTEGER) {
1945                         devices = (u32) obj->integer.value;
1946                 }
1947         }
1948 
1949         kfree(out.pointer);
1950         return devices;
1951 }
1952 
1953 /*
1954  * Platform device
1955  */
1956 static int acer_platform_probe(struct platform_device *device)
1957 {
1958         int err;
1959 
1960         if (has_cap(ACER_CAP_MAILLED)) {
1961                 err = acer_led_init(&device->dev);
1962                 if (err)
1963                         goto error_mailled;
1964         }
1965 
1966         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1967                 err = acer_backlight_init(&device->dev);
1968                 if (err)
1969                         goto error_brightness;
1970         }
1971 
1972         err = acer_rfkill_init(&device->dev);
1973         if (err)
1974                 goto error_rfkill;
1975 
1976         return err;
1977 
1978 error_rfkill:
1979         if (has_cap(ACER_CAP_BRIGHTNESS))
1980                 acer_backlight_exit();
1981 error_brightness:
1982         if (has_cap(ACER_CAP_MAILLED))
1983                 acer_led_exit();
1984 error_mailled:
1985         return err;
1986 }
1987 
1988 static int acer_platform_remove(struct platform_device *device)
1989 {
1990         if (has_cap(ACER_CAP_MAILLED))
1991                 acer_led_exit();
1992         if (has_cap(ACER_CAP_BRIGHTNESS))
1993                 acer_backlight_exit();
1994 
1995         acer_rfkill_exit();
1996         return 0;
1997 }
1998 
1999 #ifdef CONFIG_PM_SLEEP
2000 static int acer_suspend(struct device *dev)
2001 {
2002         u32 value;
2003         struct acer_data *data = &interface->data;
2004 
2005         if (!data)
2006                 return -ENOMEM;
2007 
2008         if (has_cap(ACER_CAP_MAILLED)) {
2009                 get_u32(&value, ACER_CAP_MAILLED);
2010                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2011                 data->mailled = value;
2012         }
2013 
2014         if (has_cap(ACER_CAP_BRIGHTNESS)) {
2015                 get_u32(&value, ACER_CAP_BRIGHTNESS);
2016                 data->brightness = value;
2017         }
2018 
2019         return 0;
2020 }
2021 
2022 static int acer_resume(struct device *dev)
2023 {
2024         struct acer_data *data = &interface->data;
2025 
2026         if (!data)
2027                 return -ENOMEM;
2028 
2029         if (has_cap(ACER_CAP_MAILLED))
2030                 set_u32(data->mailled, ACER_CAP_MAILLED);
2031 
2032         if (has_cap(ACER_CAP_BRIGHTNESS))
2033                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
2034 
2035         if (has_cap(ACER_CAP_ACCEL))
2036                 acer_gsensor_init();
2037 
2038         return 0;
2039 }
2040 #else
2041 #define acer_suspend    NULL
2042 #define acer_resume     NULL
2043 #endif
2044 
2045 static SIMPLE_DEV_PM_OPS(acer_pm, acer_suspend, acer_resume);
2046 
2047 static void acer_platform_shutdown(struct platform_device *device)
2048 {
2049         struct acer_data *data = &interface->data;
2050 
2051         if (!data)
2052                 return;
2053 
2054         if (has_cap(ACER_CAP_MAILLED))
2055                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2056 }
2057 
2058 static struct platform_driver acer_platform_driver = {
2059         .driver = {
2060                 .name = "acer-wmi",
2061                 .pm = &acer_pm,
2062         },
2063         .probe = acer_platform_probe,
2064         .remove = acer_platform_remove,
2065         .shutdown = acer_platform_shutdown,
2066 };
2067 
2068 static struct platform_device *acer_platform_device;
2069 
2070 static void remove_debugfs(void)
2071 {
2072         debugfs_remove(interface->debug.devices);
2073         debugfs_remove(interface->debug.root);
2074 }
2075 
2076 static int __init create_debugfs(void)
2077 {
2078         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
2079         if (!interface->debug.root) {
2080                 pr_err("Failed to create debugfs directory");
2081                 return -ENOMEM;
2082         }
2083 
2084         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
2085                                         interface->debug.root,
2086                                         &interface->debug.wmid_devices);
2087         if (!interface->debug.devices)
2088                 goto error_debugfs;
2089 
2090         return 0;
2091 
2092 error_debugfs:
2093         remove_debugfs();
2094         return -ENOMEM;
2095 }
2096 
2097 static int __init acer_wmi_init(void)
2098 {
2099         int err;
2100 
2101         pr_info("Acer Laptop ACPI-WMI Extras\n");
2102 
2103         if (dmi_check_system(acer_blacklist)) {
2104                 pr_info("Blacklisted hardware detected - not loading\n");
2105                 return -ENODEV;
2106         }
2107 
2108         find_quirks();
2109 
2110         /*
2111          * Detect which ACPI-WMI interface we're using.
2112          */
2113         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2114                 interface = &AMW0_V2_interface;
2115 
2116         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2117                 interface = &wmid_interface;
2118 
2119         if (wmi_has_guid(WMID_GUID3))
2120                 interface = &wmid_v2_interface;
2121 
2122         if (interface)
2123                 dmi_walk(type_aa_dmi_decode, NULL);
2124 
2125         if (wmi_has_guid(WMID_GUID2) && interface) {
2126                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
2127                         pr_err("Unable to detect available WMID devices\n");
2128                         return -ENODEV;
2129                 }
2130                 /* WMID always provides brightness methods */
2131                 interface->capability |= ACER_CAP_BRIGHTNESS;
2132         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
2133                 pr_err("No WMID device detection method found\n");
2134                 return -ENODEV;
2135         }
2136 
2137         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
2138                 interface = &AMW0_interface;
2139 
2140                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
2141                         pr_err("Unable to detect available AMW0 devices\n");
2142                         return -ENODEV;
2143                 }
2144         }
2145 
2146         if (wmi_has_guid(AMW0_GUID1))
2147                 AMW0_find_mailled();
2148 
2149         if (!interface) {
2150                 pr_err("No or unsupported WMI interface, unable to load\n");
2151                 return -ENODEV;
2152         }
2153 
2154         set_quirks();
2155 
2156         if (dmi_check_system(video_vendor_dmi_table))
2157                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2158 
2159         if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2160                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
2161 
2162         if (wmi_has_guid(WMID_GUID3)) {
2163                 if (ec_raw_mode) {
2164                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
2165                                 pr_err("Cannot enable EC raw mode\n");
2166                                 return -ENODEV;
2167                         }
2168                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
2169                         pr_err("Cannot enable Launch Manager mode\n");
2170                         return -ENODEV;
2171                 }
2172         } else if (ec_raw_mode) {
2173                 pr_info("No WMID EC raw mode enable method\n");
2174         }
2175 
2176         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2177                 err = acer_wmi_input_setup();
2178                 if (err)
2179                         return err;
2180         }
2181 
2182         acer_wmi_accel_setup();
2183 
2184         err = platform_driver_register(&acer_platform_driver);
2185         if (err) {
2186                 pr_err("Unable to register platform driver\n");
2187                 goto error_platform_register;
2188         }
2189 
2190         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2191         if (!acer_platform_device) {
2192                 err = -ENOMEM;
2193                 goto error_device_alloc;
2194         }
2195 
2196         err = platform_device_add(acer_platform_device);
2197         if (err)
2198                 goto error_device_add;
2199 
2200         if (wmi_has_guid(WMID_GUID2)) {
2201                 interface->debug.wmid_devices = get_wmid_devices();
2202                 err = create_debugfs();
2203                 if (err)
2204                         goto error_create_debugfs;
2205         }
2206 
2207         /* Override any initial settings with values from the commandline */
2208         acer_commandline_init();
2209 
2210         return 0;
2211 
2212 error_create_debugfs:
2213         platform_device_del(acer_platform_device);
2214 error_device_add:
2215         platform_device_put(acer_platform_device);
2216 error_device_alloc:
2217         platform_driver_unregister(&acer_platform_driver);
2218 error_platform_register:
2219         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2220                 acer_wmi_input_destroy();
2221         if (has_cap(ACER_CAP_ACCEL))
2222                 acer_wmi_accel_destroy();
2223 
2224         return err;
2225 }
2226 
2227 static void __exit acer_wmi_exit(void)
2228 {
2229         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2230                 acer_wmi_input_destroy();
2231 
2232         if (has_cap(ACER_CAP_ACCEL))
2233                 acer_wmi_accel_destroy();
2234 
2235         remove_debugfs();
2236         platform_device_unregister(acer_platform_device);
2237         platform_driver_unregister(&acer_platform_driver);
2238 
2239         pr_info("Acer Laptop WMI Extras unloaded\n");
2240         return;
2241 }
2242 
2243 module_init(acer_wmi_init);
2244 module_exit(acer_wmi_exit);
2245 

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