Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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 int AMW0_set_cap_acpi_check_device_found __initdata;
797 
798 static acpi_status __init AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
799         u32 level, void *context, void **retval)
800 {
801         AMW0_set_cap_acpi_check_device_found = 1;
802         return AE_OK;
803 }
804 
805 static const struct acpi_device_id norfkill_ids[] __initconst = {
806         { "VPC2004", 0},
807         { "IBM0068", 0},
808         { "LEN0068", 0},
809         { "SNY5001", 0},        /* sony-laptop in charge */
810         { "", 0},
811 };
812 
813 static int __init AMW0_set_cap_acpi_check_device(void)
814 {
815         const struct acpi_device_id *id;
816 
817         for (id = norfkill_ids; id->id[0]; id++)
818                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
819                                 NULL, NULL);
820         return AMW0_set_cap_acpi_check_device_found;
821 }
822 
823 static acpi_status __init AMW0_set_capabilities(void)
824 {
825         struct wmab_args args;
826         struct wmab_ret ret;
827         acpi_status status;
828         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
829         union acpi_object *obj;
830 
831         /*
832          * On laptops with this strange GUID (non Acer), normal probing doesn't
833          * work.
834          */
835         if (wmi_has_guid(AMW0_GUID2)) {
836                 if ((quirks != &quirk_unknown) ||
837                     !AMW0_set_cap_acpi_check_device())
838                         interface->capability |= ACER_CAP_WIRELESS;
839                 return AE_OK;
840         }
841 
842         args.eax = ACER_AMW0_WRITE;
843         args.ecx = args.edx = 0;
844 
845         args.ebx = 0xa2 << 8;
846         args.ebx |= ACER_AMW0_WIRELESS_MASK;
847 
848         status = wmab_execute(&args, &out);
849         if (ACPI_FAILURE(status))
850                 return status;
851 
852         obj = out.pointer;
853         if (obj && obj->type == ACPI_TYPE_BUFFER &&
854         obj->buffer.length == sizeof(struct wmab_ret)) {
855                 ret = *((struct wmab_ret *) obj->buffer.pointer);
856         } else {
857                 status = AE_ERROR;
858                 goto out;
859         }
860 
861         if (ret.eax & 0x1)
862                 interface->capability |= ACER_CAP_WIRELESS;
863 
864         args.ebx = 2 << 8;
865         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
866 
867         /*
868          * It's ok to use existing buffer for next wmab_execute call.
869          * But we need to kfree(out.pointer) if next wmab_execute fail.
870          */
871         status = wmab_execute(&args, &out);
872         if (ACPI_FAILURE(status))
873                 goto out;
874 
875         obj = (union acpi_object *) out.pointer;
876         if (obj && obj->type == ACPI_TYPE_BUFFER
877         && obj->buffer.length == sizeof(struct wmab_ret)) {
878                 ret = *((struct wmab_ret *) obj->buffer.pointer);
879         } else {
880                 status = AE_ERROR;
881                 goto out;
882         }
883 
884         if (ret.eax & 0x1)
885                 interface->capability |= ACER_CAP_BLUETOOTH;
886 
887         /*
888          * This appears to be safe to enable, since all Wistron based laptops
889          * appear to use the same EC register for brightness, even if they
890          * differ for wireless, etc
891          */
892         if (quirks->brightness >= 0)
893                 interface->capability |= ACER_CAP_BRIGHTNESS;
894 
895         status = AE_OK;
896 out:
897         kfree(out.pointer);
898         return status;
899 }
900 
901 static struct wmi_interface AMW0_interface = {
902         .type = ACER_AMW0,
903 };
904 
905 static struct wmi_interface AMW0_V2_interface = {
906         .type = ACER_AMW0_V2,
907 };
908 
909 /*
910  * New interface (The WMID interface)
911  */
912 static acpi_status
913 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
914 {
915         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
916         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
917         union acpi_object *obj;
918         u32 tmp = 0;
919         acpi_status status;
920 
921         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
922 
923         if (ACPI_FAILURE(status))
924                 return status;
925 
926         obj = (union acpi_object *) result.pointer;
927         if (obj) {
928                 if (obj->type == ACPI_TYPE_BUFFER &&
929                         (obj->buffer.length == sizeof(u32) ||
930                         obj->buffer.length == sizeof(u64))) {
931                         tmp = *((u32 *) obj->buffer.pointer);
932                 } else if (obj->type == ACPI_TYPE_INTEGER) {
933                         tmp = (u32) obj->integer.value;
934                 }
935         }
936 
937         if (out)
938                 *out = tmp;
939 
940         kfree(result.pointer);
941 
942         return status;
943 }
944 
945 static acpi_status WMID_get_u32(u32 *value, u32 cap)
946 {
947         acpi_status status;
948         u8 tmp;
949         u32 result, method_id = 0;
950 
951         switch (cap) {
952         case ACER_CAP_WIRELESS:
953                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
954                 break;
955         case ACER_CAP_BLUETOOTH:
956                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
957                 break;
958         case ACER_CAP_BRIGHTNESS:
959                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
960                 break;
961         case ACER_CAP_THREEG:
962                 method_id = ACER_WMID_GET_THREEG_METHODID;
963                 break;
964         case ACER_CAP_MAILLED:
965                 if (quirks->mailled == 1) {
966                         ec_read(0x9f, &tmp);
967                         *value = tmp & 0x1;
968                         return 0;
969                 }
970         default:
971                 return AE_ERROR;
972         }
973         status = WMI_execute_u32(method_id, 0, &result);
974 
975         if (ACPI_SUCCESS(status))
976                 *value = (u8)result;
977 
978         return status;
979 }
980 
981 static acpi_status WMID_set_u32(u32 value, u32 cap)
982 {
983         u32 method_id = 0;
984         char param;
985 
986         switch (cap) {
987         case ACER_CAP_BRIGHTNESS:
988                 if (value > max_brightness)
989                         return AE_BAD_PARAMETER;
990                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
991                 break;
992         case ACER_CAP_WIRELESS:
993                 if (value > 1)
994                         return AE_BAD_PARAMETER;
995                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
996                 break;
997         case ACER_CAP_BLUETOOTH:
998                 if (value > 1)
999                         return AE_BAD_PARAMETER;
1000                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
1001                 break;
1002         case ACER_CAP_THREEG:
1003                 if (value > 1)
1004                         return AE_BAD_PARAMETER;
1005                 method_id = ACER_WMID_SET_THREEG_METHODID;
1006                 break;
1007         case ACER_CAP_MAILLED:
1008                 if (value > 1)
1009                         return AE_BAD_PARAMETER;
1010                 if (quirks->mailled == 1) {
1011                         param = value ? 0x92 : 0x93;
1012                         i8042_lock_chip();
1013                         i8042_command(&param, 0x1059);
1014                         i8042_unlock_chip();
1015                         return 0;
1016                 }
1017                 break;
1018         default:
1019                 return AE_ERROR;
1020         }
1021         return WMI_execute_u32(method_id, (u32)value, NULL);
1022 }
1023 
1024 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1025 {
1026         struct wmid3_gds_return_value return_value;
1027         acpi_status status;
1028         union acpi_object *obj;
1029         struct wmid3_gds_get_input_param params = {
1030                 .function_num = 0x1,
1031                 .hotkey_number = commun_fn_key_number,
1032                 .devices = device,
1033         };
1034         struct acpi_buffer input = {
1035                 sizeof(struct wmid3_gds_get_input_param),
1036                 &params
1037         };
1038         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1039 
1040         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1041         if (ACPI_FAILURE(status))
1042                 return status;
1043 
1044         obj = output.pointer;
1045 
1046         if (!obj)
1047                 return AE_ERROR;
1048         else if (obj->type != ACPI_TYPE_BUFFER) {
1049                 kfree(obj);
1050                 return AE_ERROR;
1051         }
1052         if (obj->buffer.length != 8) {
1053                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1054                 kfree(obj);
1055                 return AE_ERROR;
1056         }
1057 
1058         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1059         kfree(obj);
1060 
1061         if (return_value.error_code || return_value.ec_return_value)
1062                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
1063                         device,
1064                         return_value.error_code,
1065                         return_value.ec_return_value);
1066         else
1067                 *value = !!(return_value.devices & device);
1068 
1069         return status;
1070 }
1071 
1072 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
1073 {
1074         u16 device;
1075 
1076         switch (cap) {
1077         case ACER_CAP_WIRELESS:
1078                 device = ACER_WMID3_GDS_WIRELESS;
1079                 break;
1080         case ACER_CAP_BLUETOOTH:
1081                 device = ACER_WMID3_GDS_BLUETOOTH;
1082                 break;
1083         case ACER_CAP_THREEG:
1084                 device = ACER_WMID3_GDS_THREEG;
1085                 break;
1086         default:
1087                 return AE_ERROR;
1088         }
1089         return wmid3_get_device_status(value, device);
1090 }
1091 
1092 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1093 {
1094         struct wmid3_gds_return_value return_value;
1095         acpi_status status;
1096         union acpi_object *obj;
1097         u16 devices;
1098         struct wmid3_gds_get_input_param get_params = {
1099                 .function_num = 0x1,
1100                 .hotkey_number = commun_fn_key_number,
1101                 .devices = commun_func_bitmap,
1102         };
1103         struct acpi_buffer get_input = {
1104                 sizeof(struct wmid3_gds_get_input_param),
1105                 &get_params
1106         };
1107         struct wmid3_gds_set_input_param set_params = {
1108                 .function_num = 0x2,
1109                 .hotkey_number = commun_fn_key_number,
1110                 .devices = commun_func_bitmap,
1111         };
1112         struct acpi_buffer set_input = {
1113                 sizeof(struct wmid3_gds_set_input_param),
1114                 &set_params
1115         };
1116         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1117         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1118 
1119         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
1120         if (ACPI_FAILURE(status))
1121                 return status;
1122 
1123         obj = output.pointer;
1124 
1125         if (!obj)
1126                 return AE_ERROR;
1127         else if (obj->type != ACPI_TYPE_BUFFER) {
1128                 kfree(obj);
1129                 return AE_ERROR;
1130         }
1131         if (obj->buffer.length != 8) {
1132                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1133                 kfree(obj);
1134                 return AE_ERROR;
1135         }
1136 
1137         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1138         kfree(obj);
1139 
1140         if (return_value.error_code || return_value.ec_return_value) {
1141                 pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1142                         return_value.error_code,
1143                         return_value.ec_return_value);
1144                 return status;
1145         }
1146 
1147         devices = return_value.devices;
1148         set_params.devices = (value) ? (devices | device) : (devices & ~device);
1149 
1150         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
1151         if (ACPI_FAILURE(status))
1152                 return status;
1153 
1154         obj = output2.pointer;
1155 
1156         if (!obj)
1157                 return AE_ERROR;
1158         else if (obj->type != ACPI_TYPE_BUFFER) {
1159                 kfree(obj);
1160                 return AE_ERROR;
1161         }
1162         if (obj->buffer.length != 4) {
1163                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1164                 kfree(obj);
1165                 return AE_ERROR;
1166         }
1167 
1168         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1169         kfree(obj);
1170 
1171         if (return_value.error_code || return_value.ec_return_value)
1172                 pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1173                         return_value.error_code,
1174                         return_value.ec_return_value);
1175 
1176         return status;
1177 }
1178 
1179 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1180 {
1181         u16 device;
1182 
1183         switch (cap) {
1184         case ACER_CAP_WIRELESS:
1185                 device = ACER_WMID3_GDS_WIRELESS;
1186                 break;
1187         case ACER_CAP_BLUETOOTH:
1188                 device = ACER_WMID3_GDS_BLUETOOTH;
1189                 break;
1190         case ACER_CAP_THREEG:
1191                 device = ACER_WMID3_GDS_THREEG;
1192                 break;
1193         default:
1194                 return AE_ERROR;
1195         }
1196         return wmid3_set_device_status(value, device);
1197 }
1198 
1199 static void __init type_aa_dmi_decode(const struct dmi_header *header, void *d)
1200 {
1201         struct hotkey_function_type_aa *type_aa;
1202 
1203         /* We are looking for OEM-specific Type AAh */
1204         if (header->type != 0xAA)
1205                 return;
1206 
1207         has_type_aa = true;
1208         type_aa = (struct hotkey_function_type_aa *) header;
1209 
1210         pr_info("Function bitmap for Communication Button: 0x%x\n",
1211                 type_aa->commun_func_bitmap);
1212         commun_func_bitmap = type_aa->commun_func_bitmap;
1213 
1214         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1215                 interface->capability |= ACER_CAP_WIRELESS;
1216         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1217                 interface->capability |= ACER_CAP_THREEG;
1218         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1219                 interface->capability |= ACER_CAP_BLUETOOTH;
1220 
1221         commun_fn_key_number = type_aa->commun_fn_key_number;
1222 }
1223 
1224 static acpi_status __init WMID_set_capabilities(void)
1225 {
1226         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1227         union acpi_object *obj;
1228         acpi_status status;
1229         u32 devices;
1230 
1231         status = wmi_query_block(WMID_GUID2, 1, &out);
1232         if (ACPI_FAILURE(status))
1233                 return status;
1234 
1235         obj = (union acpi_object *) out.pointer;
1236         if (obj) {
1237                 if (obj->type == ACPI_TYPE_BUFFER &&
1238                         (obj->buffer.length == sizeof(u32) ||
1239                         obj->buffer.length == sizeof(u64))) {
1240                         devices = *((u32 *) obj->buffer.pointer);
1241                 } else if (obj->type == ACPI_TYPE_INTEGER) {
1242                         devices = (u32) obj->integer.value;
1243                 } else {
1244                         kfree(out.pointer);
1245                         return AE_ERROR;
1246                 }
1247         } else {
1248                 kfree(out.pointer);
1249                 return AE_ERROR;
1250         }
1251 
1252         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1253         if (devices & 0x07)
1254                 interface->capability |= ACER_CAP_WIRELESS;
1255         if (devices & 0x40)
1256                 interface->capability |= ACER_CAP_THREEG;
1257         if (devices & 0x10)
1258                 interface->capability |= ACER_CAP_BLUETOOTH;
1259 
1260         if (!(devices & 0x20))
1261                 max_brightness = 0x9;
1262 
1263         kfree(out.pointer);
1264         return status;
1265 }
1266 
1267 static struct wmi_interface wmid_interface = {
1268         .type = ACER_WMID,
1269 };
1270 
1271 static struct wmi_interface wmid_v2_interface = {
1272         .type = ACER_WMID_v2,
1273 };
1274 
1275 /*
1276  * Generic Device (interface-independent)
1277  */
1278 
1279 static acpi_status get_u32(u32 *value, u32 cap)
1280 {
1281         acpi_status status = AE_ERROR;
1282 
1283         switch (interface->type) {
1284         case ACER_AMW0:
1285                 status = AMW0_get_u32(value, cap);
1286                 break;
1287         case ACER_AMW0_V2:
1288                 if (cap == ACER_CAP_MAILLED) {
1289                         status = AMW0_get_u32(value, cap);
1290                         break;
1291                 }
1292         case ACER_WMID:
1293                 status = WMID_get_u32(value, cap);
1294                 break;
1295         case ACER_WMID_v2:
1296                 if (cap & (ACER_CAP_WIRELESS |
1297                            ACER_CAP_BLUETOOTH |
1298                            ACER_CAP_THREEG))
1299                         status = wmid_v2_get_u32(value, cap);
1300                 else if (wmi_has_guid(WMID_GUID2))
1301                         status = WMID_get_u32(value, cap);
1302                 break;
1303         }
1304 
1305         return status;
1306 }
1307 
1308 static acpi_status set_u32(u32 value, u32 cap)
1309 {
1310         acpi_status status;
1311 
1312         if (interface->capability & cap) {
1313                 switch (interface->type) {
1314                 case ACER_AMW0:
1315                         return AMW0_set_u32(value, cap);
1316                 case ACER_AMW0_V2:
1317                         if (cap == ACER_CAP_MAILLED)
1318                                 return AMW0_set_u32(value, cap);
1319 
1320                         /*
1321                          * On some models, some WMID methods don't toggle
1322                          * properly. For those cases, we want to run the AMW0
1323                          * method afterwards to be certain we've really toggled
1324                          * the device state.
1325                          */
1326                         if (cap == ACER_CAP_WIRELESS ||
1327                                 cap == ACER_CAP_BLUETOOTH) {
1328                                 status = WMID_set_u32(value, cap);
1329                                 if (ACPI_FAILURE(status))
1330                                         return status;
1331 
1332                                 return AMW0_set_u32(value, cap);
1333                         }
1334                 case ACER_WMID:
1335                         return WMID_set_u32(value, cap);
1336                 case ACER_WMID_v2:
1337                         if (cap & (ACER_CAP_WIRELESS |
1338                                    ACER_CAP_BLUETOOTH |
1339                                    ACER_CAP_THREEG))
1340                                 return wmid_v2_set_u32(value, cap);
1341                         else if (wmi_has_guid(WMID_GUID2))
1342                                 return WMID_set_u32(value, cap);
1343                 default:
1344                         return AE_BAD_PARAMETER;
1345                 }
1346         }
1347         return AE_BAD_PARAMETER;
1348 }
1349 
1350 static void __init acer_commandline_init(void)
1351 {
1352         /*
1353          * These will all fail silently if the value given is invalid, or the
1354          * capability isn't available on the given interface
1355          */
1356         if (mailled >= 0)
1357                 set_u32(mailled, ACER_CAP_MAILLED);
1358         if (!has_type_aa && threeg >= 0)
1359                 set_u32(threeg, ACER_CAP_THREEG);
1360         if (brightness >= 0)
1361                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1362 }
1363 
1364 /*
1365  * LED device (Mail LED only, no other LEDs known yet)
1366  */
1367 static void mail_led_set(struct led_classdev *led_cdev,
1368 enum led_brightness value)
1369 {
1370         set_u32(value, ACER_CAP_MAILLED);
1371 }
1372 
1373 static struct led_classdev mail_led = {
1374         .name = "acer-wmi::mail",
1375         .brightness_set = mail_led_set,
1376 };
1377 
1378 static int acer_led_init(struct device *dev)
1379 {
1380         return led_classdev_register(dev, &mail_led);
1381 }
1382 
1383 static void acer_led_exit(void)
1384 {
1385         set_u32(LED_OFF, ACER_CAP_MAILLED);
1386         led_classdev_unregister(&mail_led);
1387 }
1388 
1389 /*
1390  * Backlight device
1391  */
1392 static struct backlight_device *acer_backlight_device;
1393 
1394 static int read_brightness(struct backlight_device *bd)
1395 {
1396         u32 value;
1397         get_u32(&value, ACER_CAP_BRIGHTNESS);
1398         return value;
1399 }
1400 
1401 static int update_bl_status(struct backlight_device *bd)
1402 {
1403         int intensity = bd->props.brightness;
1404 
1405         if (bd->props.power != FB_BLANK_UNBLANK)
1406                 intensity = 0;
1407         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1408                 intensity = 0;
1409 
1410         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1411 
1412         return 0;
1413 }
1414 
1415 static const struct backlight_ops acer_bl_ops = {
1416         .get_brightness = read_brightness,
1417         .update_status = update_bl_status,
1418 };
1419 
1420 static int acer_backlight_init(struct device *dev)
1421 {
1422         struct backlight_properties props;
1423         struct backlight_device *bd;
1424 
1425         memset(&props, 0, sizeof(struct backlight_properties));
1426         props.type = BACKLIGHT_PLATFORM;
1427         props.max_brightness = max_brightness;
1428         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1429                                        &props);
1430         if (IS_ERR(bd)) {
1431                 pr_err("Could not register Acer backlight device\n");
1432                 acer_backlight_device = NULL;
1433                 return PTR_ERR(bd);
1434         }
1435 
1436         acer_backlight_device = bd;
1437 
1438         bd->props.power = FB_BLANK_UNBLANK;
1439         bd->props.brightness = read_brightness(bd);
1440         backlight_update_status(bd);
1441         return 0;
1442 }
1443 
1444 static void acer_backlight_exit(void)
1445 {
1446         backlight_device_unregister(acer_backlight_device);
1447 }
1448 
1449 /*
1450  * Accelerometer device
1451  */
1452 static acpi_handle gsensor_handle;
1453 
1454 static int acer_gsensor_init(void)
1455 {
1456         acpi_status status;
1457         struct acpi_buffer output;
1458         union acpi_object out_obj;
1459 
1460         output.length = sizeof(out_obj);
1461         output.pointer = &out_obj;
1462         status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
1463         if (ACPI_FAILURE(status))
1464                 return -1;
1465 
1466         return 0;
1467 }
1468 
1469 static int acer_gsensor_open(struct input_dev *input)
1470 {
1471         return acer_gsensor_init();
1472 }
1473 
1474 static int acer_gsensor_event(void)
1475 {
1476         acpi_status status;
1477         struct acpi_buffer output;
1478         union acpi_object out_obj[5];
1479 
1480         if (!has_cap(ACER_CAP_ACCEL))
1481                 return -1;
1482 
1483         output.length = sizeof(out_obj);
1484         output.pointer = out_obj;
1485 
1486         status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
1487         if (ACPI_FAILURE(status))
1488                 return -1;
1489 
1490         if (out_obj->package.count != 4)
1491                 return -1;
1492 
1493         input_report_abs(acer_wmi_accel_dev, ABS_X,
1494                 (s16)out_obj->package.elements[0].integer.value);
1495         input_report_abs(acer_wmi_accel_dev, ABS_Y,
1496                 (s16)out_obj->package.elements[1].integer.value);
1497         input_report_abs(acer_wmi_accel_dev, ABS_Z,
1498                 (s16)out_obj->package.elements[2].integer.value);
1499         input_sync(acer_wmi_accel_dev);
1500         return 0;
1501 }
1502 
1503 /*
1504  * Rfkill devices
1505  */
1506 static void acer_rfkill_update(struct work_struct *ignored);
1507 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1508 static void acer_rfkill_update(struct work_struct *ignored)
1509 {
1510         u32 state;
1511         acpi_status status;
1512 
1513         if (has_cap(ACER_CAP_WIRELESS)) {
1514                 status = get_u32(&state, ACER_CAP_WIRELESS);
1515                 if (ACPI_SUCCESS(status)) {
1516                         if (quirks->wireless == 3)
1517                                 rfkill_set_hw_state(wireless_rfkill, !state);
1518                         else
1519                                 rfkill_set_sw_state(wireless_rfkill, !state);
1520                 }
1521         }
1522 
1523         if (has_cap(ACER_CAP_BLUETOOTH)) {
1524                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1525                 if (ACPI_SUCCESS(status))
1526                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1527         }
1528 
1529         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1530                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1531                 if (ACPI_SUCCESS(status))
1532                         rfkill_set_sw_state(threeg_rfkill, !state);
1533         }
1534 
1535         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1536 }
1537 
1538 static int acer_rfkill_set(void *data, bool blocked)
1539 {
1540         acpi_status status;
1541         u32 cap = (unsigned long)data;
1542 
1543         if (rfkill_inited) {
1544                 status = set_u32(!blocked, cap);
1545                 if (ACPI_FAILURE(status))
1546                         return -ENODEV;
1547         }
1548 
1549         return 0;
1550 }
1551 
1552 static const struct rfkill_ops acer_rfkill_ops = {
1553         .set_block = acer_rfkill_set,
1554 };
1555 
1556 static struct rfkill *acer_rfkill_register(struct device *dev,
1557                                            enum rfkill_type type,
1558                                            char *name, u32 cap)
1559 {
1560         int err;
1561         struct rfkill *rfkill_dev;
1562         u32 state;
1563         acpi_status status;
1564 
1565         rfkill_dev = rfkill_alloc(name, dev, type,
1566                                   &acer_rfkill_ops,
1567                                   (void *)(unsigned long)cap);
1568         if (!rfkill_dev)
1569                 return ERR_PTR(-ENOMEM);
1570 
1571         status = get_u32(&state, cap);
1572 
1573         err = rfkill_register(rfkill_dev);
1574         if (err) {
1575                 rfkill_destroy(rfkill_dev);
1576                 return ERR_PTR(err);
1577         }
1578 
1579         if (ACPI_SUCCESS(status))
1580                 rfkill_set_sw_state(rfkill_dev, !state);
1581 
1582         return rfkill_dev;
1583 }
1584 
1585 static int acer_rfkill_init(struct device *dev)
1586 {
1587         int err;
1588 
1589         if (has_cap(ACER_CAP_WIRELESS)) {
1590                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1591                         "acer-wireless", ACER_CAP_WIRELESS);
1592                 if (IS_ERR(wireless_rfkill)) {
1593                         err = PTR_ERR(wireless_rfkill);
1594                         goto error_wireless;
1595                 }
1596         }
1597 
1598         if (has_cap(ACER_CAP_BLUETOOTH)) {
1599                 bluetooth_rfkill = acer_rfkill_register(dev,
1600                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1601                         ACER_CAP_BLUETOOTH);
1602                 if (IS_ERR(bluetooth_rfkill)) {
1603                         err = PTR_ERR(bluetooth_rfkill);
1604                         goto error_bluetooth;
1605                 }
1606         }
1607 
1608         if (has_cap(ACER_CAP_THREEG)) {
1609                 threeg_rfkill = acer_rfkill_register(dev,
1610                         RFKILL_TYPE_WWAN, "acer-threeg",
1611                         ACER_CAP_THREEG);
1612                 if (IS_ERR(threeg_rfkill)) {
1613                         err = PTR_ERR(threeg_rfkill);
1614                         goto error_threeg;
1615                 }
1616         }
1617 
1618         rfkill_inited = true;
1619 
1620         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1621             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1622                 schedule_delayed_work(&acer_rfkill_work,
1623                         round_jiffies_relative(HZ));
1624 
1625         return 0;
1626 
1627 error_threeg:
1628         if (has_cap(ACER_CAP_BLUETOOTH)) {
1629                 rfkill_unregister(bluetooth_rfkill);
1630                 rfkill_destroy(bluetooth_rfkill);
1631         }
1632 error_bluetooth:
1633         if (has_cap(ACER_CAP_WIRELESS)) {
1634                 rfkill_unregister(wireless_rfkill);
1635                 rfkill_destroy(wireless_rfkill);
1636         }
1637 error_wireless:
1638         return err;
1639 }
1640 
1641 static void acer_rfkill_exit(void)
1642 {
1643         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1644             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1645                 cancel_delayed_work_sync(&acer_rfkill_work);
1646 
1647         if (has_cap(ACER_CAP_WIRELESS)) {
1648                 rfkill_unregister(wireless_rfkill);
1649                 rfkill_destroy(wireless_rfkill);
1650         }
1651 
1652         if (has_cap(ACER_CAP_BLUETOOTH)) {
1653                 rfkill_unregister(bluetooth_rfkill);
1654                 rfkill_destroy(bluetooth_rfkill);
1655         }
1656 
1657         if (has_cap(ACER_CAP_THREEG)) {
1658                 rfkill_unregister(threeg_rfkill);
1659                 rfkill_destroy(threeg_rfkill);
1660         }
1661         return;
1662 }
1663 
1664 /*
1665  * sysfs interface
1666  */
1667 static ssize_t show_bool_threeg(struct device *dev,
1668         struct device_attribute *attr, char *buf)
1669 {
1670         u32 result; \
1671         acpi_status status;
1672 
1673         pr_info("This threeg sysfs will be removed in 2014 - used by: %s\n",
1674                 current->comm);
1675         status = get_u32(&result, ACER_CAP_THREEG);
1676         if (ACPI_SUCCESS(status))
1677                 return sprintf(buf, "%u\n", result);
1678         return sprintf(buf, "Read error\n");
1679 }
1680 
1681 static ssize_t set_bool_threeg(struct device *dev,
1682         struct device_attribute *attr, const char *buf, size_t count)
1683 {
1684         u32 tmp = simple_strtoul(buf, NULL, 10);
1685         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1686         pr_info("This threeg sysfs will be removed in 2014 - used by: %s\n",
1687                 current->comm);
1688         if (ACPI_FAILURE(status))
1689                 return -EINVAL;
1690         return count;
1691 }
1692 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1693         set_bool_threeg);
1694 
1695 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1696         char *buf)
1697 {
1698         pr_info("This interface sysfs will be removed in 2014 - used by: %s\n",
1699                 current->comm);
1700         switch (interface->type) {
1701         case ACER_AMW0:
1702                 return sprintf(buf, "AMW0\n");
1703         case ACER_AMW0_V2:
1704                 return sprintf(buf, "AMW0 v2\n");
1705         case ACER_WMID:
1706                 return sprintf(buf, "WMID\n");
1707         case ACER_WMID_v2:
1708                 return sprintf(buf, "WMID v2\n");
1709         default:
1710                 return sprintf(buf, "Error!\n");
1711         }
1712 }
1713 
1714 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1715 
1716 static void acer_wmi_notify(u32 value, void *context)
1717 {
1718         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1719         union acpi_object *obj;
1720         struct event_return_value return_value;
1721         acpi_status status;
1722         u16 device_state;
1723         const struct key_entry *key;
1724         u32 scancode;
1725 
1726         status = wmi_get_event_data(value, &response);
1727         if (status != AE_OK) {
1728                 pr_warn("bad event status 0x%x\n", status);
1729                 return;
1730         }
1731 
1732         obj = (union acpi_object *)response.pointer;
1733 
1734         if (!obj)
1735                 return;
1736         if (obj->type != ACPI_TYPE_BUFFER) {
1737                 pr_warn("Unknown response received %d\n", obj->type);
1738                 kfree(obj);
1739                 return;
1740         }
1741         if (obj->buffer.length != 8) {
1742                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1743                 kfree(obj);
1744                 return;
1745         }
1746 
1747         return_value = *((struct event_return_value *)obj->buffer.pointer);
1748         kfree(obj);
1749 
1750         switch (return_value.function) {
1751         case WMID_HOTKEY_EVENT:
1752                 device_state = return_value.device_state;
1753                 pr_debug("device state: 0x%x\n", device_state);
1754 
1755                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1756                                                         return_value.key_num);
1757                 if (!key) {
1758                         pr_warn("Unknown key number - 0x%x\n",
1759                                 return_value.key_num);
1760                 } else {
1761                         scancode = return_value.key_num;
1762                         switch (key->keycode) {
1763                         case KEY_WLAN:
1764                         case KEY_BLUETOOTH:
1765                                 if (has_cap(ACER_CAP_WIRELESS))
1766                                         rfkill_set_sw_state(wireless_rfkill,
1767                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1768                                 if (has_cap(ACER_CAP_THREEG))
1769                                         rfkill_set_sw_state(threeg_rfkill,
1770                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1771                                 if (has_cap(ACER_CAP_BLUETOOTH))
1772                                         rfkill_set_sw_state(bluetooth_rfkill,
1773                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1774                                 break;
1775                         case KEY_TOUCHPAD_TOGGLE:
1776                                 scancode = (device_state & ACER_WMID3_GDS_TOUCHPAD) ?
1777                                                 KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF;
1778                         }
1779                         sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
1780                 }
1781                 break;
1782         case WMID_ACCEL_EVENT:
1783                 acer_gsensor_event();
1784                 break;
1785         default:
1786                 pr_warn("Unknown function number - %d - %d\n",
1787                         return_value.function, return_value.key_num);
1788                 break;
1789         }
1790 }
1791 
1792 static acpi_status __init
1793 wmid3_set_lm_mode(struct lm_input_params *params,
1794                   struct lm_return_value *return_value)
1795 {
1796         acpi_status status;
1797         union acpi_object *obj;
1798 
1799         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1800         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1801 
1802         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1803         if (ACPI_FAILURE(status))
1804                 return status;
1805 
1806         obj = output.pointer;
1807 
1808         if (!obj)
1809                 return AE_ERROR;
1810         else if (obj->type != ACPI_TYPE_BUFFER) {
1811                 kfree(obj);
1812                 return AE_ERROR;
1813         }
1814         if (obj->buffer.length != 4) {
1815                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1816                 kfree(obj);
1817                 return AE_ERROR;
1818         }
1819 
1820         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1821         kfree(obj);
1822 
1823         return status;
1824 }
1825 
1826 static int __init acer_wmi_enable_ec_raw(void)
1827 {
1828         struct lm_return_value return_value;
1829         acpi_status status;
1830         struct lm_input_params params = {
1831                 .function_num = 0x1,
1832                 .commun_devices = 0xFFFF,
1833                 .devices = 0xFFFF,
1834                 .lm_status = 0x00,            /* Launch Manager Deactive */
1835         };
1836 
1837         status = wmid3_set_lm_mode(&params, &return_value);
1838 
1839         if (return_value.error_code || return_value.ec_return_value)
1840                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1841                         return_value.error_code,
1842                         return_value.ec_return_value);
1843         else
1844                 pr_info("Enabled EC raw mode\n");
1845 
1846         return status;
1847 }
1848 
1849 static int __init acer_wmi_enable_lm(void)
1850 {
1851         struct lm_return_value return_value;
1852         acpi_status status;
1853         struct lm_input_params params = {
1854                 .function_num = 0x1,
1855                 .commun_devices = 0xFFFF,
1856                 .devices = 0xFFFF,
1857                 .lm_status = 0x01,            /* Launch Manager Active */
1858         };
1859 
1860         status = wmid3_set_lm_mode(&params, &return_value);
1861 
1862         if (return_value.error_code || return_value.ec_return_value)
1863                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1864                         return_value.error_code,
1865                         return_value.ec_return_value);
1866 
1867         return status;
1868 }
1869 
1870 static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
1871                                                 void *ctx, void **retval)
1872 {
1873         *(acpi_handle *)retval = ah;
1874         return AE_OK;
1875 }
1876 
1877 static int __init acer_wmi_get_handle(const char *name, const char *prop,
1878                                         acpi_handle *ah)
1879 {
1880         acpi_status status;
1881         acpi_handle handle;
1882 
1883         BUG_ON(!name || !ah);
1884 
1885         handle = NULL;
1886         status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
1887                                         (void *)name, &handle);
1888 
1889         if (ACPI_SUCCESS(status)) {
1890                 *ah = handle;
1891                 return 0;
1892         } else {
1893                 return -ENODEV;
1894         }
1895 }
1896 
1897 static int __init acer_wmi_accel_setup(void)
1898 {
1899         int err;
1900 
1901         err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
1902         if (err)
1903                 return err;
1904 
1905         interface->capability |= ACER_CAP_ACCEL;
1906 
1907         acer_wmi_accel_dev = input_allocate_device();
1908         if (!acer_wmi_accel_dev)
1909                 return -ENOMEM;
1910 
1911         acer_wmi_accel_dev->open = acer_gsensor_open;
1912 
1913         acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
1914         acer_wmi_accel_dev->phys = "wmi/input1";
1915         acer_wmi_accel_dev->id.bustype = BUS_HOST;
1916         acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
1917         input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
1918         input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
1919         input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);
1920 
1921         err = input_register_device(acer_wmi_accel_dev);
1922         if (err)
1923                 goto err_free_dev;
1924 
1925         return 0;
1926 
1927 err_free_dev:
1928         input_free_device(acer_wmi_accel_dev);
1929         return err;
1930 }
1931 
1932 static void acer_wmi_accel_destroy(void)
1933 {
1934         input_unregister_device(acer_wmi_accel_dev);
1935 }
1936 
1937 static int __init acer_wmi_input_setup(void)
1938 {
1939         acpi_status status;
1940         int err;
1941 
1942         acer_wmi_input_dev = input_allocate_device();
1943         if (!acer_wmi_input_dev)
1944                 return -ENOMEM;
1945 
1946         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1947         acer_wmi_input_dev->phys = "wmi/input0";
1948         acer_wmi_input_dev->id.bustype = BUS_HOST;
1949 
1950         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1951         if (err)
1952                 goto err_free_dev;
1953 
1954         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1955                                                 acer_wmi_notify, NULL);
1956         if (ACPI_FAILURE(status)) {
1957                 err = -EIO;
1958                 goto err_free_keymap;
1959         }
1960 
1961         err = input_register_device(acer_wmi_input_dev);
1962         if (err)
1963                 goto err_uninstall_notifier;
1964 
1965         return 0;
1966 
1967 err_uninstall_notifier:
1968         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1969 err_free_keymap:
1970         sparse_keymap_free(acer_wmi_input_dev);
1971 err_free_dev:
1972         input_free_device(acer_wmi_input_dev);
1973         return err;
1974 }
1975 
1976 static void acer_wmi_input_destroy(void)
1977 {
1978         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1979         sparse_keymap_free(acer_wmi_input_dev);
1980         input_unregister_device(acer_wmi_input_dev);
1981 }
1982 
1983 /*
1984  * debugfs functions
1985  */
1986 static u32 get_wmid_devices(void)
1987 {
1988         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1989         union acpi_object *obj;
1990         acpi_status status;
1991         u32 devices = 0;
1992 
1993         status = wmi_query_block(WMID_GUID2, 1, &out);
1994         if (ACPI_FAILURE(status))
1995                 return 0;
1996 
1997         obj = (union acpi_object *) out.pointer;
1998         if (obj) {
1999                 if (obj->type == ACPI_TYPE_BUFFER &&
2000                         (obj->buffer.length == sizeof(u32) ||
2001                         obj->buffer.length == sizeof(u64))) {
2002                         devices = *((u32 *) obj->buffer.pointer);
2003                 } else if (obj->type == ACPI_TYPE_INTEGER) {
2004                         devices = (u32) obj->integer.value;
2005                 }
2006         }
2007 
2008         kfree(out.pointer);
2009         return devices;
2010 }
2011 
2012 /*
2013  * Platform device
2014  */
2015 static int acer_platform_probe(struct platform_device *device)
2016 {
2017         int err;
2018 
2019         if (has_cap(ACER_CAP_MAILLED)) {
2020                 err = acer_led_init(&device->dev);
2021                 if (err)
2022                         goto error_mailled;
2023         }
2024 
2025         if (has_cap(ACER_CAP_BRIGHTNESS)) {
2026                 err = acer_backlight_init(&device->dev);
2027                 if (err)
2028                         goto error_brightness;
2029         }
2030 
2031         err = acer_rfkill_init(&device->dev);
2032         if (err)
2033                 goto error_rfkill;
2034 
2035         return err;
2036 
2037 error_rfkill:
2038         if (has_cap(ACER_CAP_BRIGHTNESS))
2039                 acer_backlight_exit();
2040 error_brightness:
2041         if (has_cap(ACER_CAP_MAILLED))
2042                 acer_led_exit();
2043 error_mailled:
2044         return err;
2045 }
2046 
2047 static int acer_platform_remove(struct platform_device *device)
2048 {
2049         if (has_cap(ACER_CAP_MAILLED))
2050                 acer_led_exit();
2051         if (has_cap(ACER_CAP_BRIGHTNESS))
2052                 acer_backlight_exit();
2053 
2054         acer_rfkill_exit();
2055         return 0;
2056 }
2057 
2058 #ifdef CONFIG_PM_SLEEP
2059 static int acer_suspend(struct device *dev)
2060 {
2061         u32 value;
2062         struct acer_data *data = &interface->data;
2063 
2064         if (!data)
2065                 return -ENOMEM;
2066 
2067         if (has_cap(ACER_CAP_MAILLED)) {
2068                 get_u32(&value, ACER_CAP_MAILLED);
2069                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2070                 data->mailled = value;
2071         }
2072 
2073         if (has_cap(ACER_CAP_BRIGHTNESS)) {
2074                 get_u32(&value, ACER_CAP_BRIGHTNESS);
2075                 data->brightness = value;
2076         }
2077 
2078         return 0;
2079 }
2080 
2081 static int acer_resume(struct device *dev)
2082 {
2083         struct acer_data *data = &interface->data;
2084 
2085         if (!data)
2086                 return -ENOMEM;
2087 
2088         if (has_cap(ACER_CAP_MAILLED))
2089                 set_u32(data->mailled, ACER_CAP_MAILLED);
2090 
2091         if (has_cap(ACER_CAP_BRIGHTNESS))
2092                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
2093 
2094         if (has_cap(ACER_CAP_ACCEL))
2095                 acer_gsensor_init();
2096 
2097         return 0;
2098 }
2099 #else
2100 #define acer_suspend    NULL
2101 #define acer_resume     NULL
2102 #endif
2103 
2104 static SIMPLE_DEV_PM_OPS(acer_pm, acer_suspend, acer_resume);
2105 
2106 static void acer_platform_shutdown(struct platform_device *device)
2107 {
2108         struct acer_data *data = &interface->data;
2109 
2110         if (!data)
2111                 return;
2112 
2113         if (has_cap(ACER_CAP_MAILLED))
2114                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2115 }
2116 
2117 static struct platform_driver acer_platform_driver = {
2118         .driver = {
2119                 .name = "acer-wmi",
2120                 .owner = THIS_MODULE,
2121                 .pm = &acer_pm,
2122         },
2123         .probe = acer_platform_probe,
2124         .remove = acer_platform_remove,
2125         .shutdown = acer_platform_shutdown,
2126 };
2127 
2128 static struct platform_device *acer_platform_device;
2129 
2130 static int remove_sysfs(struct platform_device *device)
2131 {
2132         if (has_cap(ACER_CAP_THREEG))
2133                 device_remove_file(&device->dev, &dev_attr_threeg);
2134 
2135         device_remove_file(&device->dev, &dev_attr_interface);
2136 
2137         return 0;
2138 }
2139 
2140 static int __init create_sysfs(void)
2141 {
2142         int retval = -ENOMEM;
2143 
2144         if (has_cap(ACER_CAP_THREEG)) {
2145                 retval = device_create_file(&acer_platform_device->dev,
2146                         &dev_attr_threeg);
2147                 if (retval)
2148                         goto error_sysfs;
2149         }
2150 
2151         retval = device_create_file(&acer_platform_device->dev,
2152                 &dev_attr_interface);
2153         if (retval)
2154                 goto error_sysfs;
2155 
2156         return 0;
2157 
2158 error_sysfs:
2159                 remove_sysfs(acer_platform_device);
2160         return retval;
2161 }
2162 
2163 static void remove_debugfs(void)
2164 {
2165         debugfs_remove(interface->debug.devices);
2166         debugfs_remove(interface->debug.root);
2167 }
2168 
2169 static int __init create_debugfs(void)
2170 {
2171         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
2172         if (!interface->debug.root) {
2173                 pr_err("Failed to create debugfs directory");
2174                 return -ENOMEM;
2175         }
2176 
2177         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
2178                                         interface->debug.root,
2179                                         &interface->debug.wmid_devices);
2180         if (!interface->debug.devices)
2181                 goto error_debugfs;
2182 
2183         return 0;
2184 
2185 error_debugfs:
2186         remove_debugfs();
2187         return -ENOMEM;
2188 }
2189 
2190 static int __init acer_wmi_init(void)
2191 {
2192         int err;
2193 
2194         pr_info("Acer Laptop ACPI-WMI Extras\n");
2195 
2196         if (dmi_check_system(acer_blacklist)) {
2197                 pr_info("Blacklisted hardware detected - not loading\n");
2198                 return -ENODEV;
2199         }
2200 
2201         find_quirks();
2202 
2203         /*
2204          * Detect which ACPI-WMI interface we're using.
2205          */
2206         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2207                 interface = &AMW0_V2_interface;
2208 
2209         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2210                 interface = &wmid_interface;
2211 
2212         if (wmi_has_guid(WMID_GUID3))
2213                 interface = &wmid_v2_interface;
2214 
2215         if (interface)
2216                 dmi_walk(type_aa_dmi_decode, NULL);
2217 
2218         if (wmi_has_guid(WMID_GUID2) && interface) {
2219                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
2220                         pr_err("Unable to detect available WMID devices\n");
2221                         return -ENODEV;
2222                 }
2223                 /* WMID always provides brightness methods */
2224                 interface->capability |= ACER_CAP_BRIGHTNESS;
2225         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
2226                 pr_err("No WMID device detection method found\n");
2227                 return -ENODEV;
2228         }
2229 
2230         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
2231                 interface = &AMW0_interface;
2232 
2233                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
2234                         pr_err("Unable to detect available AMW0 devices\n");
2235                         return -ENODEV;
2236                 }
2237         }
2238 
2239         if (wmi_has_guid(AMW0_GUID1))
2240                 AMW0_find_mailled();
2241 
2242         if (!interface) {
2243                 pr_err("No or unsupported WMI interface, unable to load\n");
2244                 return -ENODEV;
2245         }
2246 
2247         set_quirks();
2248 
2249         if (dmi_check_system(video_vendor_dmi_table))
2250                 acpi_video_dmi_promote_vendor();
2251         if (acpi_video_backlight_support()) {
2252                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
2253                 pr_info("Brightness must be controlled by acpi video driver\n");
2254         } else {
2255                 pr_info("Disabling ACPI video driver\n");
2256                 acpi_video_unregister_backlight();
2257         }
2258 
2259         if (wmi_has_guid(WMID_GUID3)) {
2260                 if (ec_raw_mode) {
2261                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
2262                                 pr_err("Cannot enable EC raw mode\n");
2263                                 return -ENODEV;
2264                         }
2265                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
2266                         pr_err("Cannot enable Launch Manager mode\n");
2267                         return -ENODEV;
2268                 }
2269         } else if (ec_raw_mode) {
2270                 pr_info("No WMID EC raw mode enable method\n");
2271         }
2272 
2273         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2274                 err = acer_wmi_input_setup();
2275                 if (err)
2276                         return err;
2277         }
2278 
2279         acer_wmi_accel_setup();
2280 
2281         err = platform_driver_register(&acer_platform_driver);
2282         if (err) {
2283                 pr_err("Unable to register platform driver\n");
2284                 goto error_platform_register;
2285         }
2286 
2287         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2288         if (!acer_platform_device) {
2289                 err = -ENOMEM;
2290                 goto error_device_alloc;
2291         }
2292 
2293         err = platform_device_add(acer_platform_device);
2294         if (err)
2295                 goto error_device_add;
2296 
2297         err = create_sysfs();
2298         if (err)
2299                 goto error_create_sys;
2300 
2301         if (wmi_has_guid(WMID_GUID2)) {
2302                 interface->debug.wmid_devices = get_wmid_devices();
2303                 err = create_debugfs();
2304                 if (err)
2305                         goto error_create_debugfs;
2306         }
2307 
2308         /* Override any initial settings with values from the commandline */
2309         acer_commandline_init();
2310 
2311         return 0;
2312 
2313 error_create_debugfs:
2314         remove_sysfs(acer_platform_device);
2315 error_create_sys:
2316         platform_device_del(acer_platform_device);
2317 error_device_add:
2318         platform_device_put(acer_platform_device);
2319 error_device_alloc:
2320         platform_driver_unregister(&acer_platform_driver);
2321 error_platform_register:
2322         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2323                 acer_wmi_input_destroy();
2324         if (has_cap(ACER_CAP_ACCEL))
2325                 acer_wmi_accel_destroy();
2326 
2327         return err;
2328 }
2329 
2330 static void __exit acer_wmi_exit(void)
2331 {
2332         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2333                 acer_wmi_input_destroy();
2334 
2335         if (has_cap(ACER_CAP_ACCEL))
2336                 acer_wmi_accel_destroy();
2337 
2338         remove_sysfs(acer_platform_device);
2339         remove_debugfs();
2340         platform_device_unregister(acer_platform_device);
2341         platform_driver_unregister(&acer_platform_driver);
2342 
2343         pr_info("Acer Laptop WMI Extras unloaded\n");
2344         return;
2345 }
2346 
2347 module_init(acer_wmi_init);
2348 module_exit(acer_wmi_exit);
2349 

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