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acer-wmi: Add driver for newer Acer laptops
[deliverable/linux.git] / drivers / misc / acer-wmi.c
CommitLineData
745a5d21
CC		 1/*
2 * Acer WMI Laptop Extras
3 *
4 * Copyright (C) 2007-2008 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 ACER_WMI_VERSION "0.1"
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/backlight.h>
33#include <linux/leds.h>
34#include <linux/platform_device.h>
35#include <linux/acpi.h>
36#include <linux/i8042.h>
37
38#include <acpi/acpi_drivers.h>
39
40MODULE_AUTHOR("Carlos Corbacho");
41MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
42MODULE_LICENSE("GPL");
43
44#define ACER_LOGPREFIX "acer-wmi: "
45#define ACER_ERR KERN_ERR ACER_LOGPREFIX
46#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
47#define ACER_INFO KERN_INFO ACER_LOGPREFIX
48
49/*
50 * The following defines quirks to get some specific functions to work
51 * which are known to not be supported over ACPI-WMI (such as the mail LED
52 * on WMID based Acer's)
53 */
54struct acer_quirks {
55 const char *vendor;
56 const char *model;
57 u16 quirks;
58};
59
60/*
61 * Magic Number
62 * Meaning is unknown - this number is required for writing to ACPI for AMW0
63 * (it's also used in acerhk when directly accessing the BIOS)
64 */
65#define ACER_AMW0_WRITE 0x9610
66
67/*
68 * Bit masks for the AMW0 interface
69 */
70#define ACER_AMW0_WIRELESS_MASK 0x35
71#define ACER_AMW0_BLUETOOTH_MASK 0x34
72#define ACER_AMW0_MAILLED_MASK 0x31
73
74/*
75 * Method IDs for WMID interface
76 */
77#define ACER_WMID_GET_WIRELESS_METHODID 1
78#define ACER_WMID_GET_BLUETOOTH_METHODID 2
79#define ACER_WMID_GET_BRIGHTNESS_METHODID 3
80#define ACER_WMID_SET_WIRELESS_METHODID 4
81#define ACER_WMID_SET_BLUETOOTH_METHODID 5
82#define ACER_WMID_SET_BRIGHTNESS_METHODID 6
83#define ACER_WMID_GET_THREEG_METHODID 10
84#define ACER_WMID_SET_THREEG_METHODID 11
85
86/*
87 * Acer ACPI method GUIDs
88 */
89#define AMW0_GUID1 "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
90#define WMID_GUID1 "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
91#define WMID_GUID2 "95764E09-FB56-4e83-B31A-37761F60994A"
92
93MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
94MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
95
96/* Temporary workaround until the WMI sysfs interface goes in */
97MODULE_ALIAS("dmi:*:*Acer*:*:");
98
99/*
100 * Interface capability flags
101 */
102#define ACER_CAP_MAILLED (1<<0)
103#define ACER_CAP_WIRELESS (1<<1)
104#define ACER_CAP_BLUETOOTH (1<<2)
105#define ACER_CAP_BRIGHTNESS (1<<3)
106#define ACER_CAP_THREEG (1<<4)
107#define ACER_CAP_ANY (0xFFFFFFFF)
108
109/*
110 * Interface type flags
111 */
112enum interface_flags {
113 ACER_AMW0,
114 ACER_AMW0_V2,
115 ACER_WMID,
116};
117
118#define ACER_DEFAULT_WIRELESS 0
119#define ACER_DEFAULT_BLUETOOTH 0
120#define ACER_DEFAULT_MAILLED 0
121#define ACER_DEFAULT_THREEG 0
122
123static int max_brightness = 0xF;
124
125static int wireless = -1;
126static int bluetooth = -1;
127static int mailled = -1;
128static int brightness = -1;
129static int threeg = -1;
130static int force_series;
131
132module_param(mailled, int, 0444);
133module_param(wireless, int, 0444);
134module_param(bluetooth, int, 0444);
135module_param(brightness, int, 0444);
136module_param(threeg, int, 0444);
137module_param(force_series, int, 0444);
138MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
139MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
140MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
141MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
142MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
143MODULE_PARM_DESC(force_series, "Force a different laptop series");
144
145struct acer_data {
146 int mailled;
147 int wireless;
148 int bluetooth;
149 int threeg;
150 int brightness;
151};
152
153/* Each low-level interface must define at least some of the following */
154struct wmi_interface {
155 /* The WMI device type */
156 u32 type;
157
158 /* The capabilities this interface provides */
159 u32 capability;
160
161 /* Private data for the current interface */
162 struct acer_data data;
163};
164
165/* The static interface pointer, points to the currently detected interface */
166static struct wmi_interface *interface;
167
168/*
169 * Embedded Controller quirks
170 * Some laptops require us to directly access the EC to either enable or query
171 * features that are not available through WMI.
172 */
173
174struct quirk_entry {
175 u8 wireless;
176 u8 mailled;
177 u8 brightness;
178 u8 bluetooth;
179};
180
181static struct quirk_entry *quirks;
182
183static void set_quirks(void)
184{
185 if (quirks->mailled)
186 interface->capability |= ACER_CAP_MAILLED;
187
188 if (quirks->brightness)
189 interface->capability |= ACER_CAP_BRIGHTNESS;
190}
191
192static int dmi_matched(const struct dmi_system_id *dmi)
193{
194 quirks = dmi->driver_data;
195 return 0;
196}
197
198static struct quirk_entry quirk_unknown = {
199};
200
201static struct quirk_entry quirk_acer_travelmate_2490 = {
202 .mailled = 1,
203};
204
205/* This AMW0 laptop has no bluetooth */
206static struct quirk_entry quirk_medion_md_98300 = {
207 .wireless = 1,
208};
209
210static struct dmi_system_id acer_quirks[] = {
211 {
212 .callback = dmi_matched,
213 .ident = "Acer Aspire 3100",
214 .matches = {
215 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
216 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
217 },
218 .driver_data = &quirk_acer_travelmate_2490,
219 },
220 {
221 .callback = dmi_matched,
222 .ident = "Acer Aspire 5100",
223 .matches = {
224 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
225 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
226 },
227 .driver_data = &quirk_acer_travelmate_2490,
228 },
229 {
230 .callback = dmi_matched,
231 .ident = "Acer Aspire 5630",
232 .matches = {
233 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
234 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
235 },
236 .driver_data = &quirk_acer_travelmate_2490,
237 },
238 {
239 .callback = dmi_matched,
240 .ident = "Acer Aspire 5650",
241 .matches = {
242 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
243 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
244 },
245 .driver_data = &quirk_acer_travelmate_2490,
246 },
247 {
248 .callback = dmi_matched,
249 .ident = "Acer Aspire 5680",
250 .matches = {
251 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
252 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
253 },
254 .driver_data = &quirk_acer_travelmate_2490,
255 },
256 {
257 .callback = dmi_matched,
258 .ident = "Acer Aspire 9110",
259 .matches = {
260 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
261 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
262 },
263 .driver_data = &quirk_acer_travelmate_2490,
264 },
265 {
266 .callback = dmi_matched,
267 .ident = "Acer TravelMate 2490",
268 .matches = {
269 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
270 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
271 },
272 .driver_data = &quirk_acer_travelmate_2490,
273 },
274 {
275 .callback = dmi_matched,
276 .ident = "Medion MD 98300",
277 .matches = {
278 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
279 DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
280 },
281 .driver_data = &quirk_medion_md_98300,
282 },
283 {}
284};
285
286/* Find which quirks are needed for a particular vendor/ model pair */
287static void find_quirks(void)
288{
289 if (!force_series) {
290 dmi_check_system(acer_quirks);
291 } else if (force_series == 2490) {
292 quirks = &quirk_acer_travelmate_2490;
293 }
294
295 if (quirks == NULL)
296 quirks = &quirk_unknown;
297
298 set_quirks();
299}
300
301/*
302 * General interface convenience methods
303 */
304
305static bool has_cap(u32 cap)
306{
307 if ((interface->capability & cap) != 0)
308 return 1;
309
310 return 0;
311}
312
313/*
314 * AMW0 (V1) interface
315 */
316struct wmab_args {
317 u32 eax;
318 u32 ebx;
319 u32 ecx;
320 u32 edx;
321};
322
323struct wmab_ret {
324 u32 eax;
325 u32 ebx;
326 u32 ecx;
327 u32 edx;
328 u32 eex;
329};
330
331static acpi_status wmab_execute(struct wmab_args *regbuf,
332struct acpi_buffer *result)
333{
334 struct acpi_buffer input;
335 acpi_status status;
336 input.length = sizeof(struct wmab_args);
337 input.pointer = (u8 *)regbuf;
338
339 status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
340
341 return status;
342}
343
344static acpi_status AMW0_get_u32(u32 *value, u32 cap,
345struct wmi_interface *iface)
346{
347 int err;
348 u8 result;
349
350 switch (cap) {
351 case ACER_CAP_MAILLED:
352 switch (quirks->mailled) {
353 default:
354 err = ec_read(0xA, &result);
355 if (err)
356 return AE_ERROR;
357 *value = (result >> 7) & 0x1;
358 return AE_OK;
359 }
360 break;
361 case ACER_CAP_WIRELESS:
362 switch (quirks->wireless) {
363 case 1:
364 err = ec_read(0x7B, &result);
365 if (err)
366 return AE_ERROR;
367 *value = result & 0x1;
368 return AE_OK;
369 default:
370 err = ec_read(0xA, &result);
371 if (err)
372 return AE_ERROR;
373 *value = (result >> 2) & 0x1;
374 return AE_OK;
375 }
376 break;
377 case ACER_CAP_BLUETOOTH:
378 switch (quirks->bluetooth) {
379 default:
380 err = ec_read(0xA, &result);
381 if (err)
382 return AE_ERROR;
383 *value = (result >> 4) & 0x1;
384 return AE_OK;
385 }
386 break;
387 case ACER_CAP_BRIGHTNESS:
388 switch (quirks->brightness) {
389 default:
390 err = ec_read(0x83, &result);
391 if (err)
392 return AE_ERROR;
393 *value = result;
394 return AE_OK;
395 }
396 break;
397 default:
398 return AE_BAD_ADDRESS;
399 }
400 return AE_OK;
401}
402
403static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
404{
405 struct wmab_args args;
406
407 args.eax = ACER_AMW0_WRITE;
408 args.ebx = value ? (1<<8) : 0;
409 args.ecx = args.edx = 0;
410
411 switch (cap) {
412 case ACER_CAP_MAILLED:
413 if (value > 1)
414 return AE_BAD_PARAMETER;
415 args.ebx |= ACER_AMW0_MAILLED_MASK;
416 break;
417 case ACER_CAP_WIRELESS:
418 if (value > 1)
419 return AE_BAD_PARAMETER;
420 args.ebx |= ACER_AMW0_WIRELESS_MASK;
421 break;
422 case ACER_CAP_BLUETOOTH:
423 if (value > 1)
424 return AE_BAD_PARAMETER;
425 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
426 break;
427 case ACER_CAP_BRIGHTNESS:
428 if (value > max_brightness)
429 return AE_BAD_PARAMETER;
430 switch (quirks->brightness) {
431 case 1:
432 return ec_write(0x83, value);
433 default:
434 return AE_BAD_ADDRESS;
435 break;
436 }
437 default:
438 return AE_BAD_ADDRESS;
439 }
440
441 /* Actually do the set */
442 return wmab_execute(&args, NULL);
443}
444
445static acpi_status AMW0_find_mailled(void)
446{
447 struct wmab_args args;
448 struct wmab_ret ret;
449 acpi_status status = AE_OK;
450 struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
451 union acpi_object *obj;
452
453 args.eax = 0x86;
454 args.ebx = args.ecx = args.edx = 0;
455
456 status = wmab_execute(&args, &out);
457 if (ACPI_FAILURE(status))
458 return status;
459
460 obj = (union acpi_object *) out.pointer;
461 if (obj && obj->type == ACPI_TYPE_BUFFER &&
462 obj->buffer.length == sizeof(struct wmab_ret)) {
463 ret = *((struct wmab_ret *) obj->buffer.pointer);
464 } else {
465 return AE_ERROR;
466 }
467
468 if (ret.eex & 0x1)
469 interface->capability |= ACER_CAP_MAILLED;
470
471 kfree(out.pointer);
472
473 return AE_OK;
474}
475
476static acpi_status AMW0_set_capabilities(void)
477{
478 struct wmab_args args;
479 struct wmab_ret ret;
480 acpi_status status = AE_OK;
481 struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
482 union acpi_object *obj;
483
484 args.eax = ACER_AMW0_WRITE;
485 args.ecx = args.edx = 0;
486
487 args.ebx = 0xa2 << 8;
488 args.ebx |= ACER_AMW0_WIRELESS_MASK;
489
490 status = wmab_execute(&args, &out);
491 if (ACPI_FAILURE(status))
492 return status;
493
494 obj = (union acpi_object *) out.pointer;
495 if (obj && obj->type == ACPI_TYPE_BUFFER &&
496 obj->buffer.length == sizeof(struct wmab_ret)) {
497 ret = *((struct wmab_ret *) obj->buffer.pointer);
498 } else {
499 return AE_ERROR;
500 }
501
502 if (ret.eax & 0x1)
503 interface->capability |= ACER_CAP_WIRELESS;
504
505 args.ebx = 2 << 8;
506 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
507
508 status = wmab_execute(&args, &out);
509 if (ACPI_FAILURE(status))
510 return status;
511
512 obj = (union acpi_object *) out.pointer;
513 if (obj && obj->type == ACPI_TYPE_BUFFER
514 && obj->buffer.length == sizeof(struct wmab_ret)) {
515 ret = *((struct wmab_ret *) obj->buffer.pointer);
516 } else {
517 return AE_ERROR;
518 }
519
520 if (ret.eax & 0x1)
521 interface->capability |= ACER_CAP_BLUETOOTH;
522
523 kfree(out.pointer);
524
525 /*
526 * This appears to be safe to enable, since all Wistron based laptops
527 * appear to use the same EC register for brightness, even if they
528 * differ for wireless, etc
529 */
530 interface->capability |= ACER_CAP_BRIGHTNESS;
531
532 return AE_OK;
533}
534
535static struct wmi_interface AMW0_interface = {
536 .type = ACER_AMW0,
537};
538
539static struct wmi_interface AMW0_V2_interface = {
540 .type = ACER_AMW0_V2,
541};
542
543/*
544 * New interface (The WMID interface)
545 */
546static acpi_status
547WMI_execute_u32(u32 method_id, u32 in, u32 *out)
548{
549 struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
550 struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
551 union acpi_object *obj;
552 u32 tmp;
553 acpi_status status;
554
555 status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
556
557 if (ACPI_FAILURE(status))
558 return status;
559
560 obj = (union acpi_object *) result.pointer;
561 if (obj && obj->type == ACPI_TYPE_BUFFER &&
562 obj->buffer.length == sizeof(u32)) {
563 tmp = *((u32 *) obj->buffer.pointer);
564 } else {
565 tmp = 0;
566 }
567
568 if (out)
569 *out = tmp;
570
571 kfree(result.pointer);
572
573 return status;
574}
575
576static acpi_status WMID_get_u32(u32 *value, u32 cap,
577struct wmi_interface *iface)
578{
579 acpi_status status;
580 u8 tmp;
581 u32 result, method_id = 0;
582
583 switch (cap) {
584 case ACER_CAP_WIRELESS:
585 method_id = ACER_WMID_GET_WIRELESS_METHODID;
586 break;
587 case ACER_CAP_BLUETOOTH:
588 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
589 break;
590 case ACER_CAP_BRIGHTNESS:
591 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
592 break;
593 case ACER_CAP_THREEG:
594 method_id = ACER_WMID_GET_THREEG_METHODID;
595 break;
596 case ACER_CAP_MAILLED:
597 if (quirks->mailled == 1) {
598 ec_read(0x9f, &tmp);
599 *value = tmp & 0x1;
600 return 0;
601 }
602 default:
603 return AE_BAD_ADDRESS;
604 }
605 status = WMI_execute_u32(method_id, 0, &result);
606
607 if (ACPI_SUCCESS(status))
608 *value = (u8)result;
609
610 return status;
611}
612
613static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
614{
615 u32 method_id = 0;
616 char param;
617
618 switch (cap) {
619 case ACER_CAP_BRIGHTNESS:
620 if (value > max_brightness)
621 return AE_BAD_PARAMETER;
622 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
623 break;
624 case ACER_CAP_WIRELESS:
625 if (value > 1)
626 return AE_BAD_PARAMETER;
627 method_id = ACER_WMID_SET_WIRELESS_METHODID;
628 break;
629 case ACER_CAP_BLUETOOTH:
630 if (value > 1)
631 return AE_BAD_PARAMETER;
632 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
633 break;
634 case ACER_CAP_THREEG:
635 if (value > 1)
636 return AE_BAD_PARAMETER;
637 method_id = ACER_WMID_SET_THREEG_METHODID;
638 break;
639 case ACER_CAP_MAILLED:
640 if (value > 1)
641 return AE_BAD_PARAMETER;
642 if (quirks->mailled == 1) {
643 param = value ? 0x92 : 0x93;
644 i8042_command(&param, 0x1059);
645 return 0;
646 }
647 break;
648 default:
649 return AE_BAD_ADDRESS;
650 }
651 return WMI_execute_u32(method_id, (u32)value, NULL);
652}
653
654static acpi_status WMID_set_capabilities(void)
655{
656 struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
657 union acpi_object *obj;
658 acpi_status status;
659 u32 devices;
660
661 status = wmi_query_block(WMID_GUID2, 1, &out);
662 if (ACPI_FAILURE(status))
663 return status;
664
665 obj = (union acpi_object *) out.pointer;
666 if (obj && obj->type == ACPI_TYPE_BUFFER &&
667 obj->buffer.length == sizeof(u32)) {
668 devices = *((u32 *) obj->buffer.pointer);
669 } else {
670 return AE_ERROR;
671 }
672
673 /* Not sure on the meaning of the relevant bits yet to detect these */
674 interface->capability |= ACER_CAP_WIRELESS;
675 interface->capability |= ACER_CAP_THREEG;
676
677 /* WMID always provides brightness methods */
678 interface->capability |= ACER_CAP_BRIGHTNESS;
679
680 if (devices & 0x10)
681 interface->capability |= ACER_CAP_BLUETOOTH;
682
683 if (!(devices & 0x20))
684 max_brightness = 0x9;
685
686 return status;
687}
688
689static struct wmi_interface wmid_interface = {
690 .type = ACER_WMID,
691};
692
693/*
694 * Generic Device (interface-independent)
695 */
696
697static acpi_status get_u32(u32 *value, u32 cap)
698{
699 acpi_status status = AE_BAD_ADDRESS;
700
701 switch (interface->type) {
702 case ACER_AMW0:
703 status = AMW0_get_u32(value, cap, interface);
704 break;
705 case ACER_AMW0_V2:
706 if (cap == ACER_CAP_MAILLED) {
707 status = AMW0_get_u32(value, cap, interface);
708 break;
709 }
710 case ACER_WMID:
711 status = WMID_get_u32(value, cap, interface);
712 break;
713 }
714
715 return status;
716}
717
718static acpi_status set_u32(u32 value, u32 cap)
719{
720 if (interface->capability & cap) {
721 switch (interface->type) {
722 case ACER_AMW0:
723 return AMW0_set_u32(value, cap, interface);
724 case ACER_AMW0_V2:
725 case ACER_WMID:
726 return WMID_set_u32(value, cap, interface);
727 default:
728 return AE_BAD_PARAMETER;
729 }
730 }
731 return AE_BAD_PARAMETER;
732}
733
734static void __init acer_commandline_init(void)
735{
736 /*
737 * These will all fail silently if the value given is invalid, or the
738 * capability isn't available on the given interface
739 */
740 set_u32(mailled, ACER_CAP_MAILLED);
741 set_u32(wireless, ACER_CAP_WIRELESS);
742 set_u32(bluetooth, ACER_CAP_BLUETOOTH);
743 set_u32(threeg, ACER_CAP_THREEG);
744 set_u32(brightness, ACER_CAP_BRIGHTNESS);
745}
746
747/*
748 * LED device (Mail LED only, no other LEDs known yet)
749 */
750static void mail_led_set(struct led_classdev *led_cdev,
751enum led_brightness value)
752{
753 set_u32(value, ACER_CAP_MAILLED);
754}
755
756static struct led_classdev mail_led = {
757 .name = "acer-mail:green",
758 .brightness_set = mail_led_set,
759};
760
761static int __init acer_led_init(struct device *dev)
762{
763 return led_classdev_register(dev, &mail_led);
764}
765
766static void acer_led_exit(void)
767{
768 led_classdev_unregister(&mail_led);
769}
770
771/*
772 * Backlight device
773 */
774static struct backlight_device *acer_backlight_device;
775
776static int read_brightness(struct backlight_device *bd)
777{
778 u32 value;
779 get_u32(&value, ACER_CAP_BRIGHTNESS);
780 return value;
781}
782
783static int update_bl_status(struct backlight_device *bd)
784{
785 set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
786 return 0;
787}
788
789static struct backlight_ops acer_bl_ops = {
790 .get_brightness = read_brightness,
791 .update_status = update_bl_status,
792};
793
794static int __init acer_backlight_init(struct device *dev)
795{
796 struct backlight_device *bd;
797
798 bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
799 if (IS_ERR(bd)) {
800 printk(ACER_ERR "Could not register Acer backlight device\n");
801 acer_backlight_device = NULL;
802 return PTR_ERR(bd);
803 }
804
805 acer_backlight_device = bd;
806
807 bd->props.max_brightness = max_brightness;
808 bd->props.brightness = read_brightness(NULL);
809 backlight_update_status(bd);
810 return 0;
811}
812
813static void __exit acer_backlight_exit(void)
814{
815 backlight_device_unregister(acer_backlight_device);
816}
817
818/*
819 * Read/ write bool sysfs macro
820 */
821#define show_set_bool(value, cap) \
822static ssize_t \
823show_bool_##value(struct device *dev, struct device_attribute *attr, \
824 char *buf) \
825{ \
826 u32 result; \
827 acpi_status status = get_u32(&result, cap); \
828 if (ACPI_SUCCESS(status)) \
829 return sprintf(buf, "%u\n", result); \
830 return sprintf(buf, "Read error\n"); \
831} \
832\
833static ssize_t \
834set_bool_##value(struct device *dev, struct device_attribute *attr, \
835 const char *buf, size_t count) \
836{ \
837 u32 tmp = simple_strtoul(buf, NULL, 10); \
838 acpi_status status = set_u32(tmp, cap); \
839 if (ACPI_FAILURE(status)) \
840 return -EINVAL; \
841 return count; \
842} \
843static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
844 show_bool_##value, set_bool_##value);
845
846show_set_bool(wireless, ACER_CAP_WIRELESS);
847show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
848show_set_bool(threeg, ACER_CAP_THREEG);
849
850/*
851 * Read interface sysfs macro
852 */
853static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
854 char *buf)
855{
856 switch (interface->type) {
857 case ACER_AMW0:
858 return sprintf(buf, "AMW0\n");
859 case ACER_AMW0_V2:
860 return sprintf(buf, "AMW0 v2\n");
861 case ACER_WMID:
862 return sprintf(buf, "WMID\n");
863 default:
864 return sprintf(buf, "Error!\n");
865 }
866}
867
868static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
869 show_interface, NULL);
870
871/*
872 * Platform device
873 */
874static int __devinit acer_platform_probe(struct platform_device *device)
875{
876 int err;
877
878 if (has_cap(ACER_CAP_MAILLED)) {
879 err = acer_led_init(&device->dev);
880 if (err)
881 goto error_mailled;
882 }
883
884 if (has_cap(ACER_CAP_BRIGHTNESS)) {
885 err = acer_backlight_init(&device->dev);
886 if (err)
887 goto error_brightness;
888 }
889
890 return 0;
891
892error_brightness:
893 acer_led_exit();
894error_mailled:
895 return err;
896}
897
898static int acer_platform_remove(struct platform_device *device)
899{
900 if (has_cap(ACER_CAP_MAILLED))
901 acer_led_exit();
902 if (has_cap(ACER_CAP_BRIGHTNESS))
903 acer_backlight_exit();
904 return 0;
905}
906
907static int acer_platform_suspend(struct platform_device *dev,
908pm_message_t state)
909{
910 u32 value;
911 struct acer_data *data = &interface->data;
912
913 if (!data)
914 return -ENOMEM;
915
916 if (has_cap(ACER_CAP_WIRELESS)) {
917 get_u32(&value, ACER_CAP_WIRELESS);
918 data->wireless = value;
919 }
920
921 if (has_cap(ACER_CAP_BLUETOOTH)) {
922 get_u32(&value, ACER_CAP_BLUETOOTH);
923 data->bluetooth = value;
924 }
925
926 if (has_cap(ACER_CAP_MAILLED)) {
927 get_u32(&value, ACER_CAP_MAILLED);
928 data->mailled = value;
929 }
930
931 if (has_cap(ACER_CAP_BRIGHTNESS)) {
932 get_u32(&value, ACER_CAP_BRIGHTNESS);
933 data->brightness = value;
934 }
935
936 return 0;
937}
938
939static int acer_platform_resume(struct platform_device *device)
940{
941 struct acer_data *data = &interface->data;
942
943 if (!data)
944 return -ENOMEM;
945
946 if (has_cap(ACER_CAP_WIRELESS))
947 set_u32(data->wireless, ACER_CAP_WIRELESS);
948
949 if (has_cap(ACER_CAP_BLUETOOTH))
950 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
951
952 if (has_cap(ACER_CAP_THREEG))
953 set_u32(data->threeg, ACER_CAP_THREEG);
954
955 if (has_cap(ACER_CAP_MAILLED))
956 set_u32(data->mailled, ACER_CAP_MAILLED);
957
958 if (has_cap(ACER_CAP_BRIGHTNESS))
959 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
960
961 return 0;
962}
963
964static struct platform_driver acer_platform_driver = {
965 .driver = {
966 .name = "acer-wmi",
967 .owner = THIS_MODULE,
968 },
969 .probe = acer_platform_probe,
970 .remove = acer_platform_remove,
971 .suspend = acer_platform_suspend,
972 .resume = acer_platform_resume,
973};
974
975static struct platform_device *acer_platform_device;
976
977static int remove_sysfs(struct platform_device *device)
978{
979 if (has_cap(ACER_CAP_WIRELESS))
980 device_remove_file(&device->dev, &dev_attr_wireless);
981
982 if (has_cap(ACER_CAP_BLUETOOTH))
983 device_remove_file(&device->dev, &dev_attr_bluetooth);
984
985 if (has_cap(ACER_CAP_THREEG))
986 device_remove_file(&device->dev, &dev_attr_threeg);
987
988 device_remove_file(&device->dev, &dev_attr_interface);
989
990 return 0;
991}
992
993static int create_sysfs(void)
994{
995 int retval = -ENOMEM;
996
997 if (has_cap(ACER_CAP_WIRELESS)) {
998 retval = device_create_file(&acer_platform_device->dev,
999 &dev_attr_wireless);
1000 if (retval)
1001 goto error_sysfs;
1002 }
1003
1004 if (has_cap(ACER_CAP_BLUETOOTH)) {
1005 retval = device_create_file(&acer_platform_device->dev,
1006 &dev_attr_bluetooth);
1007 if (retval)
1008 goto error_sysfs;
1009 }
1010
1011 if (has_cap(ACER_CAP_THREEG)) {
1012 retval = device_create_file(&acer_platform_device->dev,
1013 &dev_attr_threeg);
1014 if (retval)
1015 goto error_sysfs;
1016 }
1017
1018 retval = device_create_file(&acer_platform_device->dev,
1019 &dev_attr_interface);
1020 if (retval)
1021 goto error_sysfs;
1022
1023 return 0;
1024
1025error_sysfs:
1026 remove_sysfs(acer_platform_device);
1027 return retval;
1028}
1029
1030static int __init acer_wmi_init(void)
1031{
1032 int err;
1033
1034 printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1035 ACER_WMI_VERSION);
1036
1037 /*
1038 * Detect which ACPI-WMI interface we're using.
1039 */
1040 if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1041 interface = &AMW0_V2_interface;
1042
1043 if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1044 interface = &wmid_interface;
1045
1046 if (wmi_has_guid(WMID_GUID2) && interface) {
1047 if (ACPI_FAILURE(WMID_set_capabilities())) {
1048 printk(ACER_ERR "Unable to detect available devices\n");
1049 return -ENODEV;
1050 }
1051 } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1052 printk(ACER_ERR "Unable to detect available devices\n");
1053 return -ENODEV;
1054 }
1055
1056 if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1057 interface = &AMW0_interface;
1058
1059 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1060 printk(ACER_ERR "Unable to detect available devices\n");
1061 return -ENODEV;
1062 }
1063 }
1064
1065 if (wmi_has_guid(AMW0_GUID1)) {
1066 if (ACPI_FAILURE(AMW0_find_mailled()))
1067 printk(ACER_ERR "Unable to detect mail LED\n");
1068 }
1069
1070 find_quirks();
1071
1072 if (!interface) {
1073 printk(ACER_ERR "No or unsupported WMI interface, unable to ");
1074 printk(KERN_CONT "load.\n");
1075 return -ENODEV;
1076 }
1077
1078 if (platform_driver_register(&acer_platform_driver)) {
1079 printk(ACER_ERR "Unable to register platform driver.\n");
1080 goto error_platform_register;
1081 }
1082 acer_platform_device = platform_device_alloc("acer-wmi", -1);
1083 platform_device_add(acer_platform_device);
1084
1085 err = create_sysfs();
1086 if (err)
1087 return err;
1088
1089 /* Override any initial settings with values from the commandline */
1090 acer_commandline_init();
1091
1092 return 0;
1093
1094error_platform_register:
1095 return -ENODEV;
1096}
1097
1098static void __exit acer_wmi_exit(void)
1099{
1100 remove_sysfs(acer_platform_device);
1101 platform_device_del(acer_platform_device);
1102 platform_driver_unregister(&acer_platform_driver);
1103
1104 printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1105 return;
1106}
1107
1108module_init(acer_wmi_init);
1109module_exit(acer_wmi_exit);
Linux kernel - Deliverables
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