Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 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

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[] = {
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 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 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 struct dmi_system_id acer_blacklist[] = {
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 struct dmi_system_id acer_quirks[] = {
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 video_set_backlight_video_vendor(const struct dmi_system_id *d)
534 {
535         interface->capability &= ~ACER_CAP_BRIGHTNESS;
536         pr_info("Brightness must be controlled by generic video driver\n");
537         return 0;
538 }
539 
540 static const struct dmi_system_id video_vendor_dmi_table[] = {
541         {
542                 .callback = video_set_backlight_video_vendor,
543                 .ident = "Acer TravelMate 4750",
544                 .matches = {
545                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
546                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
547                 },
548         },
549         {
550                 .callback = video_set_backlight_video_vendor,
551                 .ident = "Acer Extensa 5235",
552                 .matches = {
553                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
554                         DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
555                 },
556         },
557         {
558                 .callback = video_set_backlight_video_vendor,
559                 .ident = "Acer TravelMate 5760",
560                 .matches = {
561                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
562                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
563                 },
564         },
565         {
566                 .callback = video_set_backlight_video_vendor,
567                 .ident = "Acer Aspire 5750",
568                 .matches = {
569                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
570                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
571                 },
572         },
573         {}
574 };
575 
576 /* Find which quirks are needed for a particular vendor/ model pair */
577 static void find_quirks(void)
578 {
579         if (!force_series) {
580                 dmi_check_system(acer_quirks);
581         } else if (force_series == 2490) {
582                 quirks = &quirk_acer_travelmate_2490;
583         }
584 
585         if (quirks == NULL)
586                 quirks = &quirk_unknown;
587 
588         set_quirks();
589 }
590 
591 /*
592  * General interface convenience methods
593  */
594 
595 static bool has_cap(u32 cap)
596 {
597         if ((interface->capability & cap) != 0)
598                 return 1;
599 
600         return 0;
601 }
602 
603 /*
604  * AMW0 (V1) interface
605  */
606 struct wmab_args {
607         u32 eax;
608         u32 ebx;
609         u32 ecx;
610         u32 edx;
611 };
612 
613 struct wmab_ret {
614         u32 eax;
615         u32 ebx;
616         u32 ecx;
617         u32 edx;
618         u32 eex;
619 };
620 
621 static acpi_status wmab_execute(struct wmab_args *regbuf,
622 struct acpi_buffer *result)
623 {
624         struct acpi_buffer input;
625         acpi_status status;
626         input.length = sizeof(struct wmab_args);
627         input.pointer = (u8 *)regbuf;
628 
629         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
630 
631         return status;
632 }
633 
634 static acpi_status AMW0_get_u32(u32 *value, u32 cap)
635 {
636         int err;
637         u8 result;
638 
639         switch (cap) {
640         case ACER_CAP_MAILLED:
641                 switch (quirks->mailled) {
642                 default:
643                         err = ec_read(0xA, &result);
644                         if (err)
645                                 return AE_ERROR;
646                         *value = (result >> 7) & 0x1;
647                         return AE_OK;
648                 }
649                 break;
650         case ACER_CAP_WIRELESS:
651                 switch (quirks->wireless) {
652                 case 1:
653                         err = ec_read(0x7B, &result);
654                         if (err)
655                                 return AE_ERROR;
656                         *value = result & 0x1;
657                         return AE_OK;
658                 case 2:
659                         err = ec_read(0x71, &result);
660                         if (err)
661                                 return AE_ERROR;
662                         *value = result & 0x1;
663                         return AE_OK;
664                 case 3:
665                         err = ec_read(0x78, &result);
666                         if (err)
667                                 return AE_ERROR;
668                         *value = result & 0x1;
669                         return AE_OK;
670                 default:
671                         err = ec_read(0xA, &result);
672                         if (err)
673                                 return AE_ERROR;
674                         *value = (result >> 2) & 0x1;
675                         return AE_OK;
676                 }
677                 break;
678         case ACER_CAP_BLUETOOTH:
679                 switch (quirks->bluetooth) {
680                 default:
681                         err = ec_read(0xA, &result);
682                         if (err)
683                                 return AE_ERROR;
684                         *value = (result >> 4) & 0x1;
685                         return AE_OK;
686                 }
687                 break;
688         case ACER_CAP_BRIGHTNESS:
689                 switch (quirks->brightness) {
690                 default:
691                         err = ec_read(0x83, &result);
692                         if (err)
693                                 return AE_ERROR;
694                         *value = result;
695                         return AE_OK;
696                 }
697                 break;
698         default:
699                 return AE_ERROR;
700         }
701         return AE_OK;
702 }
703 
704 static acpi_status AMW0_set_u32(u32 value, u32 cap)
705 {
706         struct wmab_args args;
707 
708         args.eax = ACER_AMW0_WRITE;
709         args.ebx = value ? (1<<8) : 0;
710         args.ecx = args.edx = 0;
711 
712         switch (cap) {
713         case ACER_CAP_MAILLED:
714                 if (value > 1)
715                         return AE_BAD_PARAMETER;
716                 args.ebx |= ACER_AMW0_MAILLED_MASK;
717                 break;
718         case ACER_CAP_WIRELESS:
719                 if (value > 1)
720                         return AE_BAD_PARAMETER;
721                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
722                 break;
723         case ACER_CAP_BLUETOOTH:
724                 if (value > 1)
725                         return AE_BAD_PARAMETER;
726                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
727                 break;
728         case ACER_CAP_BRIGHTNESS:
729                 if (value > max_brightness)
730                         return AE_BAD_PARAMETER;
731                 switch (quirks->brightness) {
732                 default:
733                         return ec_write(0x83, value);
734                         break;
735                 }
736         default:
737                 return AE_ERROR;
738         }
739 
740         /* Actually do the set */
741         return wmab_execute(&args, NULL);
742 }
743 
744 static acpi_status AMW0_find_mailled(void)
745 {
746         struct wmab_args args;
747         struct wmab_ret ret;
748         acpi_status status = AE_OK;
749         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
750         union acpi_object *obj;
751 
752         args.eax = 0x86;
753         args.ebx = args.ecx = args.edx = 0;
754 
755         status = wmab_execute(&args, &out);
756         if (ACPI_FAILURE(status))
757                 return status;
758 
759         obj = (union acpi_object *) out.pointer;
760         if (obj && obj->type == ACPI_TYPE_BUFFER &&
761         obj->buffer.length == sizeof(struct wmab_ret)) {
762                 ret = *((struct wmab_ret *) obj->buffer.pointer);
763         } else {
764                 kfree(out.pointer);
765                 return AE_ERROR;
766         }
767 
768         if (ret.eex & 0x1)
769                 interface->capability |= ACER_CAP_MAILLED;
770 
771         kfree(out.pointer);
772 
773         return AE_OK;
774 }
775 
776 static int AMW0_set_cap_acpi_check_device_found;
777 
778 static acpi_status AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
779         u32 level, void *context, void **retval)
780 {
781         AMW0_set_cap_acpi_check_device_found = 1;
782         return AE_OK;
783 }
784 
785 static const struct acpi_device_id norfkill_ids[] = {
786         { "VPC2004", 0},
787         { "IBM0068", 0},
788         { "LEN0068", 0},
789         { "SNY5001", 0},        /* sony-laptop in charge */
790         { "", 0},
791 };
792 
793 static int AMW0_set_cap_acpi_check_device(void)
794 {
795         const struct acpi_device_id *id;
796 
797         for (id = norfkill_ids; id->id[0]; id++)
798                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
799                                 NULL, NULL);
800         return AMW0_set_cap_acpi_check_device_found;
801 }
802 
803 static acpi_status AMW0_set_capabilities(void)
804 {
805         struct wmab_args args;
806         struct wmab_ret ret;
807         acpi_status status;
808         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
809         union acpi_object *obj;
810 
811         /*
812          * On laptops with this strange GUID (non Acer), normal probing doesn't
813          * work.
814          */
815         if (wmi_has_guid(AMW0_GUID2)) {
816                 if ((quirks != &quirk_unknown) ||
817                     !AMW0_set_cap_acpi_check_device())
818                         interface->capability |= ACER_CAP_WIRELESS;
819                 return AE_OK;
820         }
821 
822         args.eax = ACER_AMW0_WRITE;
823         args.ecx = args.edx = 0;
824 
825         args.ebx = 0xa2 << 8;
826         args.ebx |= ACER_AMW0_WIRELESS_MASK;
827 
828         status = wmab_execute(&args, &out);
829         if (ACPI_FAILURE(status))
830                 return status;
831 
832         obj = out.pointer;
833         if (obj && obj->type == ACPI_TYPE_BUFFER &&
834         obj->buffer.length == sizeof(struct wmab_ret)) {
835                 ret = *((struct wmab_ret *) obj->buffer.pointer);
836         } else {
837                 status = AE_ERROR;
838                 goto out;
839         }
840 
841         if (ret.eax & 0x1)
842                 interface->capability |= ACER_CAP_WIRELESS;
843 
844         args.ebx = 2 << 8;
845         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
846 
847         /*
848          * It's ok to use existing buffer for next wmab_execute call.
849          * But we need to kfree(out.pointer) if next wmab_execute fail.
850          */
851         status = wmab_execute(&args, &out);
852         if (ACPI_FAILURE(status))
853                 goto out;
854 
855         obj = (union acpi_object *) out.pointer;
856         if (obj && obj->type == ACPI_TYPE_BUFFER
857         && obj->buffer.length == sizeof(struct wmab_ret)) {
858                 ret = *((struct wmab_ret *) obj->buffer.pointer);
859         } else {
860                 status = AE_ERROR;
861                 goto out;
862         }
863 
864         if (ret.eax & 0x1)
865                 interface->capability |= ACER_CAP_BLUETOOTH;
866 
867         /*
868          * This appears to be safe to enable, since all Wistron based laptops
869          * appear to use the same EC register for brightness, even if they
870          * differ for wireless, etc
871          */
872         if (quirks->brightness >= 0)
873                 interface->capability |= ACER_CAP_BRIGHTNESS;
874 
875         status = AE_OK;
876 out:
877         kfree(out.pointer);
878         return status;
879 }
880 
881 static struct wmi_interface AMW0_interface = {
882         .type = ACER_AMW0,
883 };
884 
885 static struct wmi_interface AMW0_V2_interface = {
886         .type = ACER_AMW0_V2,
887 };
888 
889 /*
890  * New interface (The WMID interface)
891  */
892 static acpi_status
893 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
894 {
895         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
896         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
897         union acpi_object *obj;
898         u32 tmp = 0;
899         acpi_status status;
900 
901         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
902 
903         if (ACPI_FAILURE(status))
904                 return status;
905 
906         obj = (union acpi_object *) result.pointer;
907         if (obj) {
908                 if (obj->type == ACPI_TYPE_BUFFER &&
909                         (obj->buffer.length == sizeof(u32) ||
910                         obj->buffer.length == sizeof(u64))) {
911                         tmp = *((u32 *) obj->buffer.pointer);
912                 } else if (obj->type == ACPI_TYPE_INTEGER) {
913                         tmp = (u32) obj->integer.value;
914                 }
915         }
916 
917         if (out)
918                 *out = tmp;
919 
920         kfree(result.pointer);
921 
922         return status;
923 }
924 
925 static acpi_status WMID_get_u32(u32 *value, u32 cap)
926 {
927         acpi_status status;
928         u8 tmp;
929         u32 result, method_id = 0;
930 
931         switch (cap) {
932         case ACER_CAP_WIRELESS:
933                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
934                 break;
935         case ACER_CAP_BLUETOOTH:
936                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
937                 break;
938         case ACER_CAP_BRIGHTNESS:
939                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
940                 break;
941         case ACER_CAP_THREEG:
942                 method_id = ACER_WMID_GET_THREEG_METHODID;
943                 break;
944         case ACER_CAP_MAILLED:
945                 if (quirks->mailled == 1) {
946                         ec_read(0x9f, &tmp);
947                         *value = tmp & 0x1;
948                         return 0;
949                 }
950         default:
951                 return AE_ERROR;
952         }
953         status = WMI_execute_u32(method_id, 0, &result);
954 
955         if (ACPI_SUCCESS(status))
956                 *value = (u8)result;
957 
958         return status;
959 }
960 
961 static acpi_status WMID_set_u32(u32 value, u32 cap)
962 {
963         u32 method_id = 0;
964         char param;
965 
966         switch (cap) {
967         case ACER_CAP_BRIGHTNESS:
968                 if (value > max_brightness)
969                         return AE_BAD_PARAMETER;
970                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
971                 break;
972         case ACER_CAP_WIRELESS:
973                 if (value > 1)
974                         return AE_BAD_PARAMETER;
975                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
976                 break;
977         case ACER_CAP_BLUETOOTH:
978                 if (value > 1)
979                         return AE_BAD_PARAMETER;
980                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
981                 break;
982         case ACER_CAP_THREEG:
983                 if (value > 1)
984                         return AE_BAD_PARAMETER;
985                 method_id = ACER_WMID_SET_THREEG_METHODID;
986                 break;
987         case ACER_CAP_MAILLED:
988                 if (value > 1)
989                         return AE_BAD_PARAMETER;
990                 if (quirks->mailled == 1) {
991                         param = value ? 0x92 : 0x93;
992                         i8042_lock_chip();
993                         i8042_command(&param, 0x1059);
994                         i8042_unlock_chip();
995                         return 0;
996                 }
997                 break;
998         default:
999                 return AE_ERROR;
1000         }
1001         return WMI_execute_u32(method_id, (u32)value, NULL);
1002 }
1003 
1004 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1005 {
1006         struct wmid3_gds_return_value return_value;
1007         acpi_status status;
1008         union acpi_object *obj;
1009         struct wmid3_gds_get_input_param params = {
1010                 .function_num = 0x1,
1011                 .hotkey_number = commun_fn_key_number,
1012                 .devices = device,
1013         };
1014         struct acpi_buffer input = {
1015                 sizeof(struct wmid3_gds_get_input_param),
1016                 &params
1017         };
1018         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1019 
1020         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1021         if (ACPI_FAILURE(status))
1022                 return status;
1023 
1024         obj = output.pointer;
1025 
1026         if (!obj)
1027                 return AE_ERROR;
1028         else if (obj->type != ACPI_TYPE_BUFFER) {
1029                 kfree(obj);
1030                 return AE_ERROR;
1031         }
1032         if (obj->buffer.length != 8) {
1033                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1034                 kfree(obj);
1035                 return AE_ERROR;
1036         }
1037 
1038         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1039         kfree(obj);
1040 
1041         if (return_value.error_code || return_value.ec_return_value)
1042                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
1043                         device,
1044                         return_value.error_code,
1045                         return_value.ec_return_value);
1046         else
1047                 *value = !!(return_value.devices & device);
1048 
1049         return status;
1050 }
1051 
1052 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
1053 {
1054         u16 device;
1055 
1056         switch (cap) {
1057         case ACER_CAP_WIRELESS:
1058                 device = ACER_WMID3_GDS_WIRELESS;
1059                 break;
1060         case ACER_CAP_BLUETOOTH:
1061                 device = ACER_WMID3_GDS_BLUETOOTH;
1062                 break;
1063         case ACER_CAP_THREEG:
1064                 device = ACER_WMID3_GDS_THREEG;
1065                 break;
1066         default:
1067                 return AE_ERROR;
1068         }
1069         return wmid3_get_device_status(value, device);
1070 }
1071 
1072 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1073 {
1074         struct wmid3_gds_return_value return_value;
1075         acpi_status status;
1076         union acpi_object *obj;
1077         u16 devices;
1078         struct wmid3_gds_get_input_param get_params = {
1079                 .function_num = 0x1,
1080                 .hotkey_number = commun_fn_key_number,
1081                 .devices = commun_func_bitmap,
1082         };
1083         struct acpi_buffer get_input = {
1084                 sizeof(struct wmid3_gds_get_input_param),
1085                 &get_params
1086         };
1087         struct wmid3_gds_set_input_param set_params = {
1088                 .function_num = 0x2,
1089                 .hotkey_number = commun_fn_key_number,
1090                 .devices = commun_func_bitmap,
1091         };
1092         struct acpi_buffer set_input = {
1093                 sizeof(struct wmid3_gds_set_input_param),
1094                 &set_params
1095         };
1096         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1097         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1098 
1099         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
1100         if (ACPI_FAILURE(status))
1101                 return status;
1102 
1103         obj = output.pointer;
1104 
1105         if (!obj)
1106                 return AE_ERROR;
1107         else if (obj->type != ACPI_TYPE_BUFFER) {
1108                 kfree(obj);
1109                 return AE_ERROR;
1110         }
1111         if (obj->buffer.length != 8) {
1112                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1113                 kfree(obj);
1114                 return AE_ERROR;
1115         }
1116 
1117         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1118         kfree(obj);
1119 
1120         if (return_value.error_code || return_value.ec_return_value) {
1121                 pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1122                         return_value.error_code,
1123                         return_value.ec_return_value);
1124                 return status;
1125         }
1126 
1127         devices = return_value.devices;
1128         set_params.devices = (value) ? (devices | device) : (devices & ~device);
1129 
1130         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
1131         if (ACPI_FAILURE(status))
1132                 return status;
1133 
1134         obj = output2.pointer;
1135 
1136         if (!obj)
1137                 return AE_ERROR;
1138         else if (obj->type != ACPI_TYPE_BUFFER) {
1139                 kfree(obj);
1140                 return AE_ERROR;
1141         }
1142         if (obj->buffer.length != 4) {
1143                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1144                 kfree(obj);
1145                 return AE_ERROR;
1146         }
1147 
1148         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1149         kfree(obj);
1150 
1151         if (return_value.error_code || return_value.ec_return_value)
1152                 pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1153                         return_value.error_code,
1154                         return_value.ec_return_value);
1155 
1156         return status;
1157 }
1158 
1159 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1160 {
1161         u16 device;
1162 
1163         switch (cap) {
1164         case ACER_CAP_WIRELESS:
1165                 device = ACER_WMID3_GDS_WIRELESS;
1166                 break;
1167         case ACER_CAP_BLUETOOTH:
1168                 device = ACER_WMID3_GDS_BLUETOOTH;
1169                 break;
1170         case ACER_CAP_THREEG:
1171                 device = ACER_WMID3_GDS_THREEG;
1172                 break;
1173         default:
1174                 return AE_ERROR;
1175         }
1176         return wmid3_set_device_status(value, device);
1177 }
1178 
1179 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1180 {
1181         struct hotkey_function_type_aa *type_aa;
1182 
1183         /* We are looking for OEM-specific Type AAh */
1184         if (header->type != 0xAA)
1185                 return;
1186 
1187         has_type_aa = true;
1188         type_aa = (struct hotkey_function_type_aa *) header;
1189 
1190         pr_info("Function bitmap for Communication Button: 0x%x\n",
1191                 type_aa->commun_func_bitmap);
1192         commun_func_bitmap = type_aa->commun_func_bitmap;
1193 
1194         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1195                 interface->capability |= ACER_CAP_WIRELESS;
1196         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1197                 interface->capability |= ACER_CAP_THREEG;
1198         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1199                 interface->capability |= ACER_CAP_BLUETOOTH;
1200 
1201         commun_fn_key_number = type_aa->commun_fn_key_number;
1202 }
1203 
1204 static acpi_status WMID_set_capabilities(void)
1205 {
1206         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1207         union acpi_object *obj;
1208         acpi_status status;
1209         u32 devices;
1210 
1211         status = wmi_query_block(WMID_GUID2, 1, &out);
1212         if (ACPI_FAILURE(status))
1213                 return status;
1214 
1215         obj = (union acpi_object *) out.pointer;
1216         if (obj) {
1217                 if (obj->type == ACPI_TYPE_BUFFER &&
1218                         (obj->buffer.length == sizeof(u32) ||
1219                         obj->buffer.length == sizeof(u64))) {
1220                         devices = *((u32 *) obj->buffer.pointer);
1221                 } else if (obj->type == ACPI_TYPE_INTEGER) {
1222                         devices = (u32) obj->integer.value;
1223                 } else {
1224                         kfree(out.pointer);
1225                         return AE_ERROR;
1226                 }
1227         } else {
1228                 kfree(out.pointer);
1229                 return AE_ERROR;
1230         }
1231 
1232         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1233         if (devices & 0x07)
1234                 interface->capability |= ACER_CAP_WIRELESS;
1235         if (devices & 0x40)
1236                 interface->capability |= ACER_CAP_THREEG;
1237         if (devices & 0x10)
1238                 interface->capability |= ACER_CAP_BLUETOOTH;
1239 
1240         if (!(devices & 0x20))
1241                 max_brightness = 0x9;
1242 
1243         kfree(out.pointer);
1244         return status;
1245 }
1246 
1247 static struct wmi_interface wmid_interface = {
1248         .type = ACER_WMID,
1249 };
1250 
1251 static struct wmi_interface wmid_v2_interface = {
1252         .type = ACER_WMID_v2,
1253 };
1254 
1255 /*
1256  * Generic Device (interface-independent)
1257  */
1258 
1259 static acpi_status get_u32(u32 *value, u32 cap)
1260 {
1261         acpi_status status = AE_ERROR;
1262 
1263         switch (interface->type) {
1264         case ACER_AMW0:
1265                 status = AMW0_get_u32(value, cap);
1266                 break;
1267         case ACER_AMW0_V2:
1268                 if (cap == ACER_CAP_MAILLED) {
1269                         status = AMW0_get_u32(value, cap);
1270                         break;
1271                 }
1272         case ACER_WMID:
1273                 status = WMID_get_u32(value, cap);
1274                 break;
1275         case ACER_WMID_v2:
1276                 if (cap & (ACER_CAP_WIRELESS |
1277                            ACER_CAP_BLUETOOTH |
1278                            ACER_CAP_THREEG))
1279                         status = wmid_v2_get_u32(value, cap);
1280                 else if (wmi_has_guid(WMID_GUID2))
1281                         status = WMID_get_u32(value, cap);
1282                 break;
1283         }
1284 
1285         return status;
1286 }
1287 
1288 static acpi_status set_u32(u32 value, u32 cap)
1289 {
1290         acpi_status status;
1291 
1292         if (interface->capability & cap) {
1293                 switch (interface->type) {
1294                 case ACER_AMW0:
1295                         return AMW0_set_u32(value, cap);
1296                 case ACER_AMW0_V2:
1297                         if (cap == ACER_CAP_MAILLED)
1298                                 return AMW0_set_u32(value, cap);
1299 
1300                         /*
1301                          * On some models, some WMID methods don't toggle
1302                          * properly. For those cases, we want to run the AMW0
1303                          * method afterwards to be certain we've really toggled
1304                          * the device state.
1305                          */
1306                         if (cap == ACER_CAP_WIRELESS ||
1307                                 cap == ACER_CAP_BLUETOOTH) {
1308                                 status = WMID_set_u32(value, cap);
1309                                 if (ACPI_FAILURE(status))
1310                                         return status;
1311 
1312                                 return AMW0_set_u32(value, cap);
1313                         }
1314                 case ACER_WMID:
1315                         return WMID_set_u32(value, cap);
1316                 case ACER_WMID_v2:
1317                         if (cap & (ACER_CAP_WIRELESS |
1318                                    ACER_CAP_BLUETOOTH |
1319                                    ACER_CAP_THREEG))
1320                                 return wmid_v2_set_u32(value, cap);
1321                         else if (wmi_has_guid(WMID_GUID2))
1322                                 return WMID_set_u32(value, cap);
1323                 default:
1324                         return AE_BAD_PARAMETER;
1325                 }
1326         }
1327         return AE_BAD_PARAMETER;
1328 }
1329 
1330 static void __init acer_commandline_init(void)
1331 {
1332         /*
1333          * These will all fail silently if the value given is invalid, or the
1334          * capability isn't available on the given interface
1335          */
1336         if (mailled >= 0)
1337                 set_u32(mailled, ACER_CAP_MAILLED);
1338         if (!has_type_aa && threeg >= 0)
1339                 set_u32(threeg, ACER_CAP_THREEG);
1340         if (brightness >= 0)
1341                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1342 }
1343 
1344 /*
1345  * LED device (Mail LED only, no other LEDs known yet)
1346  */
1347 static void mail_led_set(struct led_classdev *led_cdev,
1348 enum led_brightness value)
1349 {
1350         set_u32(value, ACER_CAP_MAILLED);
1351 }
1352 
1353 static struct led_classdev mail_led = {
1354         .name = "acer-wmi::mail",
1355         .brightness_set = mail_led_set,
1356 };
1357 
1358 static int acer_led_init(struct device *dev)
1359 {
1360         return led_classdev_register(dev, &mail_led);
1361 }
1362 
1363 static void acer_led_exit(void)
1364 {
1365         set_u32(LED_OFF, ACER_CAP_MAILLED);
1366         led_classdev_unregister(&mail_led);
1367 }
1368 
1369 /*
1370  * Backlight device
1371  */
1372 static struct backlight_device *acer_backlight_device;
1373 
1374 static int read_brightness(struct backlight_device *bd)
1375 {
1376         u32 value;
1377         get_u32(&value, ACER_CAP_BRIGHTNESS);
1378         return value;
1379 }
1380 
1381 static int update_bl_status(struct backlight_device *bd)
1382 {
1383         int intensity = bd->props.brightness;
1384 
1385         if (bd->props.power != FB_BLANK_UNBLANK)
1386                 intensity = 0;
1387         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1388                 intensity = 0;
1389 
1390         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1391 
1392         return 0;
1393 }
1394 
1395 static const struct backlight_ops acer_bl_ops = {
1396         .get_brightness = read_brightness,
1397         .update_status = update_bl_status,
1398 };
1399 
1400 static int acer_backlight_init(struct device *dev)
1401 {
1402         struct backlight_properties props;
1403         struct backlight_device *bd;
1404 
1405         memset(&props, 0, sizeof(struct backlight_properties));
1406         props.type = BACKLIGHT_PLATFORM;
1407         props.max_brightness = max_brightness;
1408         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1409                                        &props);
1410         if (IS_ERR(bd)) {
1411                 pr_err("Could not register Acer backlight device\n");
1412                 acer_backlight_device = NULL;
1413                 return PTR_ERR(bd);
1414         }
1415 
1416         acer_backlight_device = bd;
1417 
1418         bd->props.power = FB_BLANK_UNBLANK;
1419         bd->props.brightness = read_brightness(bd);
1420         backlight_update_status(bd);
1421         return 0;
1422 }
1423 
1424 static void acer_backlight_exit(void)
1425 {
1426         backlight_device_unregister(acer_backlight_device);
1427 }
1428 
1429 /*
1430  * Accelerometer device
1431  */
1432 static acpi_handle gsensor_handle;
1433 
1434 static int acer_gsensor_init(void)
1435 {
1436         acpi_status status;
1437         struct acpi_buffer output;
1438         union acpi_object out_obj;
1439 
1440         output.length = sizeof(out_obj);
1441         output.pointer = &out_obj;
1442         status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
1443         if (ACPI_FAILURE(status))
1444                 return -1;
1445 
1446         return 0;
1447 }
1448 
1449 static int acer_gsensor_open(struct input_dev *input)
1450 {
1451         return acer_gsensor_init();
1452 }
1453 
1454 static int acer_gsensor_event(void)
1455 {
1456         acpi_status status;
1457         struct acpi_buffer output;
1458         union acpi_object out_obj[5];
1459 
1460         if (!has_cap(ACER_CAP_ACCEL))
1461                 return -1;
1462 
1463         output.length = sizeof(out_obj);
1464         output.pointer = out_obj;
1465 
1466         status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
1467         if (ACPI_FAILURE(status))
1468                 return -1;
1469 
1470         if (out_obj->package.count != 4)
1471                 return -1;
1472 
1473         input_report_abs(acer_wmi_accel_dev, ABS_X,
1474                 (s16)out_obj->package.elements[0].integer.value);
1475         input_report_abs(acer_wmi_accel_dev, ABS_Y,
1476                 (s16)out_obj->package.elements[1].integer.value);
1477         input_report_abs(acer_wmi_accel_dev, ABS_Z,
1478                 (s16)out_obj->package.elements[2].integer.value);
1479         input_sync(acer_wmi_accel_dev);
1480         return 0;
1481 }
1482 
1483 /*
1484  * Rfkill devices
1485  */
1486 static void acer_rfkill_update(struct work_struct *ignored);
1487 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1488 static void acer_rfkill_update(struct work_struct *ignored)
1489 {
1490         u32 state;
1491         acpi_status status;
1492 
1493         if (has_cap(ACER_CAP_WIRELESS)) {
1494                 status = get_u32(&state, ACER_CAP_WIRELESS);
1495                 if (ACPI_SUCCESS(status)) {
1496                         if (quirks->wireless == 3)
1497                                 rfkill_set_hw_state(wireless_rfkill, !state);
1498                         else
1499                                 rfkill_set_sw_state(wireless_rfkill, !state);
1500                 }
1501         }
1502 
1503         if (has_cap(ACER_CAP_BLUETOOTH)) {
1504                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1505                 if (ACPI_SUCCESS(status))
1506                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1507         }
1508 
1509         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1510                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1511                 if (ACPI_SUCCESS(status))
1512                         rfkill_set_sw_state(threeg_rfkill, !state);
1513         }
1514 
1515         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1516 }
1517 
1518 static int acer_rfkill_set(void *data, bool blocked)
1519 {
1520         acpi_status status;
1521         u32 cap = (unsigned long)data;
1522 
1523         if (rfkill_inited) {
1524                 status = set_u32(!blocked, cap);
1525                 if (ACPI_FAILURE(status))
1526                         return -ENODEV;
1527         }
1528 
1529         return 0;
1530 }
1531 
1532 static const struct rfkill_ops acer_rfkill_ops = {
1533         .set_block = acer_rfkill_set,
1534 };
1535 
1536 static struct rfkill *acer_rfkill_register(struct device *dev,
1537                                            enum rfkill_type type,
1538                                            char *name, u32 cap)
1539 {
1540         int err;
1541         struct rfkill *rfkill_dev;
1542         u32 state;
1543         acpi_status status;
1544 
1545         rfkill_dev = rfkill_alloc(name, dev, type,
1546                                   &acer_rfkill_ops,
1547                                   (void *)(unsigned long)cap);
1548         if (!rfkill_dev)
1549                 return ERR_PTR(-ENOMEM);
1550 
1551         status = get_u32(&state, cap);
1552 
1553         err = rfkill_register(rfkill_dev);
1554         if (err) {
1555                 rfkill_destroy(rfkill_dev);
1556                 return ERR_PTR(err);
1557         }
1558 
1559         if (ACPI_SUCCESS(status))
1560                 rfkill_set_sw_state(rfkill_dev, !state);
1561 
1562         return rfkill_dev;
1563 }
1564 
1565 static int acer_rfkill_init(struct device *dev)
1566 {
1567         int err;
1568 
1569         if (has_cap(ACER_CAP_WIRELESS)) {
1570                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1571                         "acer-wireless", ACER_CAP_WIRELESS);
1572                 if (IS_ERR(wireless_rfkill)) {
1573                         err = PTR_ERR(wireless_rfkill);
1574                         goto error_wireless;
1575                 }
1576         }
1577 
1578         if (has_cap(ACER_CAP_BLUETOOTH)) {
1579                 bluetooth_rfkill = acer_rfkill_register(dev,
1580                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1581                         ACER_CAP_BLUETOOTH);
1582                 if (IS_ERR(bluetooth_rfkill)) {
1583                         err = PTR_ERR(bluetooth_rfkill);
1584                         goto error_bluetooth;
1585                 }
1586         }
1587 
1588         if (has_cap(ACER_CAP_THREEG)) {
1589                 threeg_rfkill = acer_rfkill_register(dev,
1590                         RFKILL_TYPE_WWAN, "acer-threeg",
1591                         ACER_CAP_THREEG);
1592                 if (IS_ERR(threeg_rfkill)) {
1593                         err = PTR_ERR(threeg_rfkill);
1594                         goto error_threeg;
1595                 }
1596         }
1597 
1598         rfkill_inited = true;
1599 
1600         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1601             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1602                 schedule_delayed_work(&acer_rfkill_work,
1603                         round_jiffies_relative(HZ));
1604 
1605         return 0;
1606 
1607 error_threeg:
1608         if (has_cap(ACER_CAP_BLUETOOTH)) {
1609                 rfkill_unregister(bluetooth_rfkill);
1610                 rfkill_destroy(bluetooth_rfkill);
1611         }
1612 error_bluetooth:
1613         if (has_cap(ACER_CAP_WIRELESS)) {
1614                 rfkill_unregister(wireless_rfkill);
1615                 rfkill_destroy(wireless_rfkill);
1616         }
1617 error_wireless:
1618         return err;
1619 }
1620 
1621 static void acer_rfkill_exit(void)
1622 {
1623         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1624             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1625                 cancel_delayed_work_sync(&acer_rfkill_work);
1626 
1627         if (has_cap(ACER_CAP_WIRELESS)) {
1628                 rfkill_unregister(wireless_rfkill);
1629                 rfkill_destroy(wireless_rfkill);
1630         }
1631 
1632         if (has_cap(ACER_CAP_BLUETOOTH)) {
1633                 rfkill_unregister(bluetooth_rfkill);
1634                 rfkill_destroy(bluetooth_rfkill);
1635         }
1636 
1637         if (has_cap(ACER_CAP_THREEG)) {
1638                 rfkill_unregister(threeg_rfkill);
1639                 rfkill_destroy(threeg_rfkill);
1640         }
1641         return;
1642 }
1643 
1644 /*
1645  * sysfs interface
1646  */
1647 static ssize_t show_bool_threeg(struct device *dev,
1648         struct device_attribute *attr, char *buf)
1649 {
1650         u32 result; \
1651         acpi_status status;
1652 
1653         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1654                 current->comm);
1655         status = get_u32(&result, ACER_CAP_THREEG);
1656         if (ACPI_SUCCESS(status))
1657                 return sprintf(buf, "%u\n", result);
1658         return sprintf(buf, "Read error\n");
1659 }
1660 
1661 static ssize_t set_bool_threeg(struct device *dev,
1662         struct device_attribute *attr, const char *buf, size_t count)
1663 {
1664         u32 tmp = simple_strtoul(buf, NULL, 10);
1665         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1666         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1667                 current->comm);
1668         if (ACPI_FAILURE(status))
1669                 return -EINVAL;
1670         return count;
1671 }
1672 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1673         set_bool_threeg);
1674 
1675 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1676         char *buf)
1677 {
1678         pr_info("This interface sysfs will be removed in 2012 - used by: %s\n",
1679                 current->comm);
1680         switch (interface->type) {
1681         case ACER_AMW0:
1682                 return sprintf(buf, "AMW0\n");
1683         case ACER_AMW0_V2:
1684                 return sprintf(buf, "AMW0 v2\n");
1685         case ACER_WMID:
1686                 return sprintf(buf, "WMID\n");
1687         case ACER_WMID_v2:
1688                 return sprintf(buf, "WMID v2\n");
1689         default:
1690                 return sprintf(buf, "Error!\n");
1691         }
1692 }
1693 
1694 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1695 
1696 static void acer_wmi_notify(u32 value, void *context)
1697 {
1698         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1699         union acpi_object *obj;
1700         struct event_return_value return_value;
1701         acpi_status status;
1702         u16 device_state;
1703         const struct key_entry *key;
1704         u32 scancode;
1705 
1706         status = wmi_get_event_data(value, &response);
1707         if (status != AE_OK) {
1708                 pr_warn("bad event status 0x%x\n", status);
1709                 return;
1710         }
1711 
1712         obj = (union acpi_object *)response.pointer;
1713 
1714         if (!obj)
1715                 return;
1716         if (obj->type != ACPI_TYPE_BUFFER) {
1717                 pr_warn("Unknown response received %d\n", obj->type);
1718                 kfree(obj);
1719                 return;
1720         }
1721         if (obj->buffer.length != 8) {
1722                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1723                 kfree(obj);
1724                 return;
1725         }
1726 
1727         return_value = *((struct event_return_value *)obj->buffer.pointer);
1728         kfree(obj);
1729 
1730         switch (return_value.function) {
1731         case WMID_HOTKEY_EVENT:
1732                 device_state = return_value.device_state;
1733                 pr_debug("device state: 0x%x\n", device_state);
1734 
1735                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1736                                                         return_value.key_num);
1737                 if (!key) {
1738                         pr_warn("Unknown key number - 0x%x\n",
1739                                 return_value.key_num);
1740                 } else {
1741                         scancode = return_value.key_num;
1742                         switch (key->keycode) {
1743                         case KEY_WLAN:
1744                         case KEY_BLUETOOTH:
1745                                 if (has_cap(ACER_CAP_WIRELESS))
1746                                         rfkill_set_sw_state(wireless_rfkill,
1747                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1748                                 if (has_cap(ACER_CAP_THREEG))
1749                                         rfkill_set_sw_state(threeg_rfkill,
1750                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1751                                 if (has_cap(ACER_CAP_BLUETOOTH))
1752                                         rfkill_set_sw_state(bluetooth_rfkill,
1753                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1754                                 break;
1755                         case KEY_TOUCHPAD_TOGGLE:
1756                                 scancode = (device_state & ACER_WMID3_GDS_TOUCHPAD) ?
1757                                                 KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF;
1758                         }
1759                         sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
1760                 }
1761                 break;
1762         case WMID_ACCEL_EVENT:
1763                 acer_gsensor_event();
1764                 break;
1765         default:
1766                 pr_warn("Unknown function number - %d - %d\n",
1767                         return_value.function, return_value.key_num);
1768                 break;
1769         }
1770 }
1771 
1772 static acpi_status
1773 wmid3_set_lm_mode(struct lm_input_params *params,
1774                   struct lm_return_value *return_value)
1775 {
1776         acpi_status status;
1777         union acpi_object *obj;
1778 
1779         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1780         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1781 
1782         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1783         if (ACPI_FAILURE(status))
1784                 return status;
1785 
1786         obj = output.pointer;
1787 
1788         if (!obj)
1789                 return AE_ERROR;
1790         else if (obj->type != ACPI_TYPE_BUFFER) {
1791                 kfree(obj);
1792                 return AE_ERROR;
1793         }
1794         if (obj->buffer.length != 4) {
1795                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1796                 kfree(obj);
1797                 return AE_ERROR;
1798         }
1799 
1800         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1801         kfree(obj);
1802 
1803         return status;
1804 }
1805 
1806 static int acer_wmi_enable_ec_raw(void)
1807 {
1808         struct lm_return_value return_value;
1809         acpi_status status;
1810         struct lm_input_params params = {
1811                 .function_num = 0x1,
1812                 .commun_devices = 0xFFFF,
1813                 .devices = 0xFFFF,
1814                 .lm_status = 0x00,            /* Launch Manager Deactive */
1815         };
1816 
1817         status = wmid3_set_lm_mode(&params, &return_value);
1818 
1819         if (return_value.error_code || return_value.ec_return_value)
1820                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1821                         return_value.error_code,
1822                         return_value.ec_return_value);
1823         else
1824                 pr_info("Enabled EC raw mode\n");
1825 
1826         return status;
1827 }
1828 
1829 static int acer_wmi_enable_lm(void)
1830 {
1831         struct lm_return_value return_value;
1832         acpi_status status;
1833         struct lm_input_params params = {
1834                 .function_num = 0x1,
1835                 .commun_devices = 0xFFFF,
1836                 .devices = 0xFFFF,
1837                 .lm_status = 0x01,            /* Launch Manager Active */
1838         };
1839 
1840         status = wmid3_set_lm_mode(&params, &return_value);
1841 
1842         if (return_value.error_code || return_value.ec_return_value)
1843                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1844                         return_value.error_code,
1845                         return_value.ec_return_value);
1846 
1847         return status;
1848 }
1849 
1850 static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
1851                                                 void *ctx, void **retval)
1852 {
1853         *(acpi_handle *)retval = ah;
1854         return AE_OK;
1855 }
1856 
1857 static int __init acer_wmi_get_handle(const char *name, const char *prop,
1858                                         acpi_handle *ah)
1859 {
1860         acpi_status status;
1861         acpi_handle handle;
1862 
1863         BUG_ON(!name || !ah);
1864 
1865         handle = NULL;
1866         status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
1867                                         (void *)name, &handle);
1868 
1869         if (ACPI_SUCCESS(status)) {
1870                 *ah = handle;
1871                 return 0;
1872         } else {
1873                 return -ENODEV;
1874         }
1875 }
1876 
1877 static int __init acer_wmi_accel_setup(void)
1878 {
1879         int err;
1880 
1881         err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
1882         if (err)
1883                 return err;
1884 
1885         interface->capability |= ACER_CAP_ACCEL;
1886 
1887         acer_wmi_accel_dev = input_allocate_device();
1888         if (!acer_wmi_accel_dev)
1889                 return -ENOMEM;
1890 
1891         acer_wmi_accel_dev->open = acer_gsensor_open;
1892 
1893         acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
1894         acer_wmi_accel_dev->phys = "wmi/input1";
1895         acer_wmi_accel_dev->id.bustype = BUS_HOST;
1896         acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
1897         input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
1898         input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
1899         input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);
1900 
1901         err = input_register_device(acer_wmi_accel_dev);
1902         if (err)
1903                 goto err_free_dev;
1904 
1905         return 0;
1906 
1907 err_free_dev:
1908         input_free_device(acer_wmi_accel_dev);
1909         return err;
1910 }
1911 
1912 static void acer_wmi_accel_destroy(void)
1913 {
1914         input_unregister_device(acer_wmi_accel_dev);
1915 }
1916 
1917 static int __init acer_wmi_input_setup(void)
1918 {
1919         acpi_status status;
1920         int err;
1921 
1922         acer_wmi_input_dev = input_allocate_device();
1923         if (!acer_wmi_input_dev)
1924                 return -ENOMEM;
1925 
1926         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1927         acer_wmi_input_dev->phys = "wmi/input0";
1928         acer_wmi_input_dev->id.bustype = BUS_HOST;
1929 
1930         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1931         if (err)
1932                 goto err_free_dev;
1933 
1934         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1935                                                 acer_wmi_notify, NULL);
1936         if (ACPI_FAILURE(status)) {
1937                 err = -EIO;
1938                 goto err_free_keymap;
1939         }
1940 
1941         err = input_register_device(acer_wmi_input_dev);
1942         if (err)
1943                 goto err_uninstall_notifier;
1944 
1945         return 0;
1946 
1947 err_uninstall_notifier:
1948         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1949 err_free_keymap:
1950         sparse_keymap_free(acer_wmi_input_dev);
1951 err_free_dev:
1952         input_free_device(acer_wmi_input_dev);
1953         return err;
1954 }
1955 
1956 static void acer_wmi_input_destroy(void)
1957 {
1958         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1959         sparse_keymap_free(acer_wmi_input_dev);
1960         input_unregister_device(acer_wmi_input_dev);
1961 }
1962 
1963 /*
1964  * debugfs functions
1965  */
1966 static u32 get_wmid_devices(void)
1967 {
1968         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1969         union acpi_object *obj;
1970         acpi_status status;
1971         u32 devices = 0;
1972 
1973         status = wmi_query_block(WMID_GUID2, 1, &out);
1974         if (ACPI_FAILURE(status))
1975                 return 0;
1976 
1977         obj = (union acpi_object *) out.pointer;
1978         if (obj) {
1979                 if (obj->type == ACPI_TYPE_BUFFER &&
1980                         (obj->buffer.length == sizeof(u32) ||
1981                         obj->buffer.length == sizeof(u64))) {
1982                         devices = *((u32 *) obj->buffer.pointer);
1983                 } else if (obj->type == ACPI_TYPE_INTEGER) {
1984                         devices = (u32) obj->integer.value;
1985                 }
1986         }
1987 
1988         kfree(out.pointer);
1989         return devices;
1990 }
1991 
1992 /*
1993  * Platform device
1994  */
1995 static int acer_platform_probe(struct platform_device *device)
1996 {
1997         int err;
1998 
1999         if (has_cap(ACER_CAP_MAILLED)) {
2000                 err = acer_led_init(&device->dev);
2001                 if (err)
2002                         goto error_mailled;
2003         }
2004 
2005         if (has_cap(ACER_CAP_BRIGHTNESS)) {
2006                 err = acer_backlight_init(&device->dev);
2007                 if (err)
2008                         goto error_brightness;
2009         }
2010 
2011         err = acer_rfkill_init(&device->dev);
2012         if (err)
2013                 goto error_rfkill;
2014 
2015         return err;
2016 
2017 error_rfkill:
2018         if (has_cap(ACER_CAP_BRIGHTNESS))
2019                 acer_backlight_exit();
2020 error_brightness:
2021         if (has_cap(ACER_CAP_MAILLED))
2022                 acer_led_exit();
2023 error_mailled:
2024         return err;
2025 }
2026 
2027 static int acer_platform_remove(struct platform_device *device)
2028 {
2029         if (has_cap(ACER_CAP_MAILLED))
2030                 acer_led_exit();
2031         if (has_cap(ACER_CAP_BRIGHTNESS))
2032                 acer_backlight_exit();
2033 
2034         acer_rfkill_exit();
2035         return 0;
2036 }
2037 
2038 static int acer_suspend(struct device *dev)
2039 {
2040         u32 value;
2041         struct acer_data *data = &interface->data;
2042 
2043         if (!data)
2044                 return -ENOMEM;
2045 
2046         if (has_cap(ACER_CAP_MAILLED)) {
2047                 get_u32(&value, ACER_CAP_MAILLED);
2048                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2049                 data->mailled = value;
2050         }
2051 
2052         if (has_cap(ACER_CAP_BRIGHTNESS)) {
2053                 get_u32(&value, ACER_CAP_BRIGHTNESS);
2054                 data->brightness = value;
2055         }
2056 
2057         return 0;
2058 }
2059 
2060 static int acer_resume(struct device *dev)
2061 {
2062         struct acer_data *data = &interface->data;
2063 
2064         if (!data)
2065                 return -ENOMEM;
2066 
2067         if (has_cap(ACER_CAP_MAILLED))
2068                 set_u32(data->mailled, ACER_CAP_MAILLED);
2069 
2070         if (has_cap(ACER_CAP_BRIGHTNESS))
2071                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
2072 
2073         if (has_cap(ACER_CAP_ACCEL))
2074                 acer_gsensor_init();
2075 
2076         return 0;
2077 }
2078 
2079 static SIMPLE_DEV_PM_OPS(acer_pm, acer_suspend, acer_resume);
2080 
2081 static void acer_platform_shutdown(struct platform_device *device)
2082 {
2083         struct acer_data *data = &interface->data;
2084 
2085         if (!data)
2086                 return;
2087 
2088         if (has_cap(ACER_CAP_MAILLED))
2089                 set_u32(LED_OFF, ACER_CAP_MAILLED);
2090 }
2091 
2092 static struct platform_driver acer_platform_driver = {
2093         .driver = {
2094                 .name = "acer-wmi",
2095                 .owner = THIS_MODULE,
2096                 .pm = &acer_pm,
2097         },
2098         .probe = acer_platform_probe,
2099         .remove = acer_platform_remove,
2100         .shutdown = acer_platform_shutdown,
2101 };
2102 
2103 static struct platform_device *acer_platform_device;
2104 
2105 static int remove_sysfs(struct platform_device *device)
2106 {
2107         if (has_cap(ACER_CAP_THREEG))
2108                 device_remove_file(&device->dev, &dev_attr_threeg);
2109 
2110         device_remove_file(&device->dev, &dev_attr_interface);
2111 
2112         return 0;
2113 }
2114 
2115 static int create_sysfs(void)
2116 {
2117         int retval = -ENOMEM;
2118 
2119         if (has_cap(ACER_CAP_THREEG)) {
2120                 retval = device_create_file(&acer_platform_device->dev,
2121                         &dev_attr_threeg);
2122                 if (retval)
2123                         goto error_sysfs;
2124         }
2125 
2126         retval = device_create_file(&acer_platform_device->dev,
2127                 &dev_attr_interface);
2128         if (retval)
2129                 goto error_sysfs;
2130 
2131         return 0;
2132 
2133 error_sysfs:
2134                 remove_sysfs(acer_platform_device);
2135         return retval;
2136 }
2137 
2138 static void remove_debugfs(void)
2139 {
2140         debugfs_remove(interface->debug.devices);
2141         debugfs_remove(interface->debug.root);
2142 }
2143 
2144 static int create_debugfs(void)
2145 {
2146         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
2147         if (!interface->debug.root) {
2148                 pr_err("Failed to create debugfs directory");
2149                 return -ENOMEM;
2150         }
2151 
2152         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
2153                                         interface->debug.root,
2154                                         &interface->debug.wmid_devices);
2155         if (!interface->debug.devices)
2156                 goto error_debugfs;
2157 
2158         return 0;
2159 
2160 error_debugfs:
2161         remove_debugfs();
2162         return -ENOMEM;
2163 }
2164 
2165 static int __init acer_wmi_init(void)
2166 {
2167         int err;
2168 
2169         pr_info("Acer Laptop ACPI-WMI Extras\n");
2170 
2171         if (dmi_check_system(acer_blacklist)) {
2172                 pr_info("Blacklisted hardware detected - not loading\n");
2173                 return -ENODEV;
2174         }
2175 
2176         find_quirks();
2177 
2178         /*
2179          * Detect which ACPI-WMI interface we're using.
2180          */
2181         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2182                 interface = &AMW0_V2_interface;
2183 
2184         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2185                 interface = &wmid_interface;
2186 
2187         if (wmi_has_guid(WMID_GUID3))
2188                 interface = &wmid_v2_interface;
2189 
2190         if (interface)
2191                 dmi_walk(type_aa_dmi_decode, NULL);
2192 
2193         if (wmi_has_guid(WMID_GUID2) && interface) {
2194                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
2195                         pr_err("Unable to detect available WMID devices\n");
2196                         return -ENODEV;
2197                 }
2198                 /* WMID always provides brightness methods */
2199                 interface->capability |= ACER_CAP_BRIGHTNESS;
2200         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
2201                 pr_err("No WMID device detection method found\n");
2202                 return -ENODEV;
2203         }
2204 
2205         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
2206                 interface = &AMW0_interface;
2207 
2208                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
2209                         pr_err("Unable to detect available AMW0 devices\n");
2210                         return -ENODEV;
2211                 }
2212         }
2213 
2214         if (wmi_has_guid(AMW0_GUID1))
2215                 AMW0_find_mailled();
2216 
2217         if (!interface) {
2218                 pr_err("No or unsupported WMI interface, unable to load\n");
2219                 return -ENODEV;
2220         }
2221 
2222         set_quirks();
2223 
2224         if (dmi_check_system(video_vendor_dmi_table))
2225                 acpi_video_dmi_promote_vendor();
2226         if (acpi_video_backlight_support()) {
2227                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
2228                 pr_info("Brightness must be controlled by acpi video driver\n");
2229         } else {
2230                 pr_info("Disabling ACPI video driver\n");
2231                 acpi_video_unregister();
2232         }
2233 
2234         if (wmi_has_guid(WMID_GUID3)) {
2235                 if (ec_raw_mode) {
2236                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
2237                                 pr_err("Cannot enable EC raw mode\n");
2238                                 return -ENODEV;
2239                         }
2240                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
2241                         pr_err("Cannot enable Launch Manager mode\n");
2242                         return -ENODEV;
2243                 }
2244         } else if (ec_raw_mode) {
2245                 pr_info("No WMID EC raw mode enable method\n");
2246         }
2247 
2248         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2249                 err = acer_wmi_input_setup();
2250                 if (err)
2251                         return err;
2252         }
2253 
2254         acer_wmi_accel_setup();
2255 
2256         err = platform_driver_register(&acer_platform_driver);
2257         if (err) {
2258                 pr_err("Unable to register platform driver\n");
2259                 goto error_platform_register;
2260         }
2261 
2262         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2263         if (!acer_platform_device) {
2264                 err = -ENOMEM;
2265                 goto error_device_alloc;
2266         }
2267 
2268         err = platform_device_add(acer_platform_device);
2269         if (err)
2270                 goto error_device_add;
2271 
2272         err = create_sysfs();
2273         if (err)
2274                 goto error_create_sys;
2275 
2276         if (wmi_has_guid(WMID_GUID2)) {
2277                 interface->debug.wmid_devices = get_wmid_devices();
2278                 err = create_debugfs();
2279                 if (err)
2280                         goto error_create_debugfs;
2281         }
2282 
2283         /* Override any initial settings with values from the commandline */
2284         acer_commandline_init();
2285 
2286         return 0;
2287 
2288 error_create_debugfs:
2289         remove_sysfs(acer_platform_device);
2290 error_create_sys:
2291         platform_device_del(acer_platform_device);
2292 error_device_add:
2293         platform_device_put(acer_platform_device);
2294 error_device_alloc:
2295         platform_driver_unregister(&acer_platform_driver);
2296 error_platform_register:
2297         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2298                 acer_wmi_input_destroy();
2299         if (has_cap(ACER_CAP_ACCEL))
2300                 acer_wmi_accel_destroy();
2301 
2302         return err;
2303 }
2304 
2305 static void __exit acer_wmi_exit(void)
2306 {
2307         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2308                 acer_wmi_input_destroy();
2309 
2310         if (has_cap(ACER_CAP_ACCEL))
2311                 acer_wmi_accel_destroy();
2312 
2313         remove_sysfs(acer_platform_device);
2314         remove_debugfs();
2315         platform_device_unregister(acer_platform_device);
2316         platform_driver_unregister(&acer_platform_driver);
2317 
2318         pr_info("Acer Laptop WMI Extras unloaded\n");
2319         return;
2320 }
2321 
2322 module_init(acer_wmi_init);
2323 module_exit(acer_wmi_exit);
2324 

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