-
Notifications
You must be signed in to change notification settings - Fork 53.4k
/
asus_acpi.c
1240 lines (1075 loc) · 34.7 KB
/
asus_acpi.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* asus_acpi.c - Asus Laptop ACPI Extras
*
*
* Copyright (C) 2002, 2003, 2004 Julien Lerouge, Karol Kozimor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* The development page for this driver is located at
* http://sourceforge.net/projects/acpi4asus/
*
* Credits:
* Pontus Fuchs - Helper functions, cleanup
* Johann Wiesner - Small compile fixes
* John Belmonte - ACPI code for Toshiba laptop was a good starting point.
*
* TODO:
* add Fn key status
* Add mode selection on module loading (parameter) -> still necessary?
* Complete display switching -- may require dirty hacks or calling _DOS?
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#define ASUS_ACPI_VERSION "0.29"
#define PROC_ASUS "asus" //the directory
#define PROC_MLED "mled"
#define PROC_WLED "wled"
#define PROC_TLED "tled"
#define PROC_INFO "info"
#define PROC_LCD "lcd"
#define PROC_BRN "brn"
#define PROC_DISP "disp"
#define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
#define ACPI_HOTK_CLASS "hotkey"
#define ACPI_HOTK_DEVICE_NAME "Hotkey"
#define ACPI_HOTK_HID "ATK0100"
/*
* Some events we use, same for all Asus
*/
#define BR_UP 0x10
#define BR_DOWN 0x20
/*
* Flags for hotk status
*/
#define MLED_ON 0x01 //is MLED ON ?
#define WLED_ON 0x02
#define TLED_ON 0x04
MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
MODULE_DESCRIPTION(ACPI_HOTK_NAME);
MODULE_LICENSE("GPL");
static uid_t asus_uid;
static gid_t asus_gid;
module_param(asus_uid, uint, 0);
MODULE_PARM_DESC(uid, "UID for entries in /proc/acpi/asus.\n");
module_param(asus_gid, uint, 0);
MODULE_PARM_DESC(gid, "GID for entries in /proc/acpi/asus.\n");
/* For each model, all features implemented,
* those marked with R are relative to HOTK, A for absolute */
struct model_data {
char *name; //name of the laptop________________A
char *mt_mled; //method to handle mled_____________R
char *mled_status; //node to handle mled reading_______A
char *mt_wled; //method to handle wled_____________R
char *wled_status; //node to handle wled reading_______A
char *mt_tled; //method to handle tled_____________R
char *tled_status; //node to handle tled reading_______A
char *mt_lcd_switch; //method to turn LCD ON/OFF_________A
char *lcd_status; //node to read LCD panel state______A
char *brightness_up; //method to set brightness up_______A
char *brightness_down; //guess what ?______________________A
char *brightness_set; //method to set absolute brightness_R
char *brightness_get; //method to get absolute brightness_R
char *brightness_status; //node to get brightness____________A
char *display_set; //method to set video output________R
char *display_get; //method to get video output________R
};
/*
* This is the main structure, we can use it to store anything interesting
* about the hotk device
*/
struct asus_hotk {
struct acpi_device *device; //the device we are in
acpi_handle handle; //the handle of the hotk device
char status; //status of the hotk, for LEDs, ...
struct model_data *methods; //methods available on the laptop
u8 brightness; //brightness level
enum {
A1x = 0, //A1340D, A1300F
A2x, //A2500H
D1x, //D1
L2D, //L2000D
L3C, //L3800C
L3D, //L3400D
L3H, //L3H, but also L2000E
L4R, //L4500R
L5x, //L5800C
L8L, //L8400L
M1A, //M1300A
M2E, //M2400E, L4400L
M6N, //M6800N
M6R, //M6700R
P30, //Samsung P30
S1x, //S1300A, but also L1400B and M2400A (L84F)
S2x, //S200 (J1 reported), Victor MP-XP7210
xxN, //M2400N, M3700N, M5200N, S1300N, S5200N, W1OOON
//(Centrino)
END_MODEL
} model; //Models currently supported
u16 event_count[128]; //count for each event TODO make this better
};
/* Here we go */
#define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
#define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
#define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
#define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
#define S1x_PREFIX "\\_SB.PCI0.PX40."
#define S2x_PREFIX A1x_PREFIX
#define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
static struct model_data model_conf[END_MODEL] = {
/*
* Those pathnames are relative to the HOTK / ATKD device :
* - mt_mled
* - mt_wled
* - brightness_set
* - brightness_get
* - display_set
* - display_get
*
* TODO I have seen a SWBX and AIBX method on some models, like L1400B,
* it seems to be a kind of switch, but what for ?
*
*/
{
.name = "A1x",
.mt_mled = "MLED",
.mled_status = "\\MAIL",
.mt_lcd_switch = A1x_PREFIX "_Q10",
.lcd_status = "\\BKLI",
.brightness_up = A1x_PREFIX "_Q0E",
.brightness_down = A1x_PREFIX "_Q0F"
},
{
.name = "A2x",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\SG66",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\BAOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "D1x",
.mt_mled = "MLED",
.mt_lcd_switch = "\\Q0D",
.lcd_status = "\\GP11",
.brightness_up = "\\Q0C",
.brightness_down = "\\Q0B",
.brightness_status = "\\BLVL",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "L2D",
.mt_mled = "MLED",
.mled_status = "\\SGP6",
.mt_wled = "WLED",
.wled_status = "\\RCP3",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\SGP0",
.brightness_up = "\\Q0E",
.brightness_down = "\\Q0F",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "L3C",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = L3C_PREFIX "_Q10",
.lcd_status = "\\GL32",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"
},
{
.name = "L3D",
.mt_mled = "MLED",
.mled_status = "\\MALD",
.mt_wled = "WLED",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\BKLG",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "L3H",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = "EHK",
.lcd_status = "\\_SB.PCI0.PM.PBC",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "L4R",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\_SB.PCI0.SBRG.SG13",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.PCI0.SBSM.SEO4",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\_SB.PCI0.P0P1.VGA.GETD"
},
{
.name = "L5x",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
.mt_tled = "TLED",
.mt_lcd_switch = "\\Q0D",
.lcd_status = "\\BAOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "L8L"
/* No features, but at least support the hotkeys */
},
{
.name = "M1A",
.mt_mled = "MLED",
.mt_lcd_switch = M1A_PREFIX "Q10",
.lcd_status = "\\PNOF",
.brightness_up = M1A_PREFIX "Q0E",
.brightness_down = M1A_PREFIX "Q0F",
.brightness_status = "\\BRIT",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "M2E",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\GP06",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
},
{
.name = "M6N",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\_SB.PCI0.SBRG.SG13",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\SSTE"
},
{
.name = "M6R",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.PCI0.SBSM.SEO4",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\SSTE"
},
{
.name = "P30",
.mt_wled = "WLED",
.mt_lcd_switch = P30_PREFIX "_Q0E",
.lcd_status = "\\BKLT",
.brightness_up = P30_PREFIX "_Q68",
.brightness_down = P30_PREFIX "_Q69",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\DNXT"
},
{
.name = "S1x",
.mt_mled = "MLED",
.mled_status = "\\EMLE",
.mt_wled = "WLED",
.mt_lcd_switch = S1x_PREFIX "Q10" ,
.lcd_status = "\\PNOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV"
},
{
.name = "S2x",
.mt_mled = "MLED",
.mled_status = "\\MAIL",
.mt_lcd_switch = S2x_PREFIX "_Q10",
.lcd_status = "\\BKLI",
.brightness_up = S2x_PREFIX "_Q0B",
.brightness_down = S2x_PREFIX "_Q0A"
},
{
.name = "xxN",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\ADVG"
}
};
/* procdir we use */
static struct proc_dir_entry *asus_proc_dir;
/*
* This header is made available to allow proper configuration given model,
* revision number , ... this info cannot go in struct asus_hotk because it is
* available before the hotk
*/
static struct acpi_table_header *asus_info;
/* The actual device the driver binds to */
static struct asus_hotk *hotk;
/*
* The hotkey driver declaration
*/
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
static struct acpi_driver asus_hotk_driver = {
.name = ACPI_HOTK_NAME,
.class = ACPI_HOTK_CLASS,
.ids = ACPI_HOTK_HID,
.ops = {
.add = asus_hotk_add,
.remove = asus_hotk_remove,
},
};
/*
* This function evaluates an ACPI method, given an int as parameter, the
* method is searched within the scope of the handle, can be NULL. The output
* of the method is written is output, which can also be NULL
*
* returns 1 if write is successful, 0 else.
*/
static int write_acpi_int(acpi_handle handle, const char *method, int val,
struct acpi_buffer *output)
{
struct acpi_object_list params; //list of input parameters (an int here)
union acpi_object in_obj; //the only param we use
acpi_status status;
params.count = 1;
params.pointer = &in_obj;
in_obj.type = ACPI_TYPE_INTEGER;
in_obj.integer.value = val;
status = acpi_evaluate_object(handle, (char *) method, ¶ms, output);
return (status == AE_OK);
}
static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
struct acpi_buffer output;
union acpi_object out_obj;
acpi_status status;
output.length = sizeof(out_obj);
output.pointer = &out_obj;
status = acpi_evaluate_object(handle, (char *) method, NULL, &output);
*val = out_obj.integer.value;
return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
}
/*
* We write our info in page, we begin at offset off and cannot write more
* than count bytes. We set eof to 1 if we handle those 2 values. We return the
* number of bytes written in page
*/
static int
proc_read_info(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
int len = 0;
int temp;
char buf[16]; //enough for all info
/*
* We use the easy way, we don't care of off and count, so we don't set eof
* to 1
*/
len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
len += sprintf(page + len, "Model reference : %s\n",
hotk->methods->name);
/*
* The SFUN method probably allows the original driver to get the list
* of features supported by a given model. For now, 0x0100 or 0x0800
* bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
* The significance of others is yet to be found.
*/
if (read_acpi_int(hotk->handle, "SFUN", &temp))
len += sprintf(page + len, "SFUN value : 0x%04x\n", temp);
/*
* Another value for userspace: the ASYM method returns 0x02 for
* battery low and 0x04 for battery critical, its readings tend to be
* more accurate than those provided by _BST.
* Note: since not all the laptops provide this method, errors are
* silently ignored.
*/
if (read_acpi_int(hotk->handle, "ASYM", &temp))
len += sprintf(page + len, "ASYM value : 0x%04x\n", temp);
if (asus_info) {
snprintf(buf, 16, "%d", asus_info->length);
len += sprintf(page + len, "DSDT length : %s\n", buf);
snprintf(buf, 16, "%d", asus_info->checksum);
len += sprintf(page + len, "DSDT checksum : %s\n", buf);
snprintf(buf, 16, "%d", asus_info->revision);
len += sprintf(page + len, "DSDT revision : %s\n", buf);
snprintf(buf, 7, "%s", asus_info->oem_id);
len += sprintf(page + len, "OEM id : %s\n", buf);
snprintf(buf, 9, "%s", asus_info->oem_table_id);
len += sprintf(page + len, "OEM table id : %s\n", buf);
snprintf(buf, 16, "%x", asus_info->oem_revision);
len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
}
return len;
}
/*
* /proc handlers
* We write our info in page, we begin at offset off and cannot write more
* than count bytes. We set eof to 1 if we handle those 2 values. We return the
* number of bytes written in page
*/
/* Generic LED functions */
static int
read_led(const char *ledname, int ledmask)
{
if (ledname) {
int led_status;
if (read_acpi_int(NULL, ledname, &led_status))
return led_status;
else
printk(KERN_WARNING "Asus ACPI: Error reading LED "
"status\n");
}
return (hotk->status & ledmask) ? 1 : 0;
}
static int parse_arg(const char __user *buf, unsigned long count, int *val)
{
char s[32];
if (!count)
return 0;
if (count > 31)
return -EINVAL;
if (copy_from_user(s, buf, count))
return -EFAULT;
s[count] = 0;
if (sscanf(s, "%i", val) != 1)
return -EINVAL;
return count;
}
/* FIXME: kill extraneous args so it can be called independently */
static int
write_led(const char __user *buffer, unsigned long count,
char *ledname, int ledmask, int invert)
{
int value;
int led_out = 0;
count = parse_arg(buffer, count, &value);
if (count > 0)
led_out = value ? 1 : 0;
hotk->status =
(led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
if (invert) /* invert target value */
led_out = !led_out & 0x1;
if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n", ledname);
return count;
}
/*
* Proc handlers for MLED
*/
static int
proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
return sprintf(page, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
}
static int
proc_write_mled(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
}
/*
* Proc handlers for WLED
*/
static int
proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
return sprintf(page, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
}
static int
proc_write_wled(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
}
/*
* Proc handlers for TLED
*/
static int
proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
return sprintf(page, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
}
static int
proc_write_tled(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
}
static int get_lcd_state(void)
{
int lcd = 0;
if (hotk->model != L3H) {
/* We don't have to check anything if we are here */
if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
printk(KERN_WARNING "Asus ACPI: Error reading LCD status\n");
if (hotk->model == L2D)
lcd = ~lcd;
} else { /* L3H and the like have to be handled differently */
acpi_status status = 0;
struct acpi_object_list input;
union acpi_object mt_params[2];
struct acpi_buffer output;
union acpi_object out_obj;
input.count = 2;
input.pointer = mt_params;
/* Note: the following values are partly guessed up, but
otherwise they seem to work */
mt_params[0].type = ACPI_TYPE_INTEGER;
mt_params[0].integer.value = 0x02;
mt_params[1].type = ACPI_TYPE_INTEGER;
mt_params[1].integer.value = 0x02;
output.length = sizeof(out_obj);
output.pointer = &out_obj;
status = acpi_evaluate_object(NULL, hotk->methods->lcd_status, &input, &output);
if (status != AE_OK)
return -1;
if (out_obj.type == ACPI_TYPE_INTEGER)
/* That's what the AML code does */
lcd = out_obj.integer.value >> 8;
}
return (lcd & 1);
}
static int set_lcd_state(int value)
{
int lcd = 0;
acpi_status status = 0;
lcd = value ? 1 : 0;
if (lcd != get_lcd_state()) {
/* switch */
if (hotk->model != L3H) {
status =
acpi_evaluate_object(NULL, hotk->methods->mt_lcd_switch,
NULL, NULL);
} else { /* L3H and the like have to be handled differently */
if (!write_acpi_int(hotk->handle, hotk->methods->mt_lcd_switch, 0x07, NULL))
status = AE_ERROR;
/* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
the exact behaviour is simulated here */
}
if (ACPI_FAILURE(status))
printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
}
return 0;
}
static int
proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
return sprintf(page, "%d\n", get_lcd_state());
}
static int
proc_write_lcd(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
int value;
count = parse_arg(buffer, count, &value);
if (count > 0)
set_lcd_state(value);
return count;
}
static int read_brightness(void)
{
int value;
if(hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
&value))
printk(KERN_WARNING "Asus ACPI: Error reading brightness\n");
} else if (hotk->methods->brightness_status) { /* For D1 for example */
if (!read_acpi_int(NULL, hotk->methods->brightness_status,
&value))
printk(KERN_WARNING "Asus ACPI: Error reading brightness\n");
} else /* No GPLV method */
value = hotk->brightness;
return value;
}
/*
* Change the brightness level
*/
static void set_brightness(int value)
{
acpi_status status = 0;
/* SPLV laptop */
if(hotk->methods->brightness_set) {
if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
value, NULL))
printk(KERN_WARNING "Asus ACPI: Error changing brightness\n");
return;
}
/* No SPLV method if we are here, act as appropriate */
value -= read_brightness();
while (value != 0) {
status = acpi_evaluate_object(NULL, (value > 0) ?
hotk->methods->brightness_up :
hotk->methods->brightness_down,
NULL, NULL);
(value > 0) ? value-- : value++;
if (ACPI_FAILURE(status))
printk(KERN_WARNING "Asus ACPI: Error changing brightness\n");
}
return;
}
static int
proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
return sprintf(page, "%d\n", read_brightness());
}
static int
proc_write_brn(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
int value;
count = parse_arg(buffer, count, &value);
if (count > 0) {
value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
/* 0 <= value <= 15 */
set_brightness(value);
} else if (count < 0) {
printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
}
return count;
}
static void set_display(int value)
{
/* no sanity check needed for now */
if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
value, NULL))
printk(KERN_WARNING "Asus ACPI: Error setting display\n");
return;
}
/*
* Now, *this* one could be more user-friendly, but so far, no-one has
* complained. The significance of bits is the same as in proc_write_disp()
*/
static int
proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
int value = 0;
if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
printk(KERN_WARNING "Asus ACPI: Error reading display status\n");
value &= 0x07; /* needed for some models, shouldn't hurt others */
return sprintf(page, "%d\n", value);
}
/*
* Experimental support for display switching. As of now: 1 should activate
* the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
* (bitwise) of these will suffice. I never actually tested 3 displays hooked up
* simultaneously, so be warned. See the acpi4asus README for more info.
*/
static int
proc_write_disp(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
int value;
count = parse_arg(buffer, count, &value);
if (count > 0)
set_display(value);
else if (count < 0)
printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
return count;
}
typedef int (proc_readfunc)(char *page, char **start, off_t off, int count,
int *eof, void *data);
typedef int (proc_writefunc)(struct file *file, const char __user *buffer,
unsigned long count, void *data);
static int
__init asus_proc_add(char *name, proc_writefunc *writefunc,
proc_readfunc *readfunc, mode_t mode,
struct acpi_device *device)
{
struct proc_dir_entry *proc = create_proc_entry(name, mode, acpi_device_dir(device));
if(!proc) {
printk(KERN_WARNING " Unable to create %s fs entry\n", name);
return -1;
}
proc->write_proc = writefunc;
proc->read_proc = readfunc;
proc->data = acpi_driver_data(device);
proc->owner = THIS_MODULE;
proc->uid = asus_uid;
proc->gid = asus_gid;
return 0;
}
static int __init asus_hotk_add_fs(struct acpi_device *device)
{
struct proc_dir_entry *proc;
mode_t mode;
/*
* If parameter uid or gid is not changed, keep the default setting for
* our proc entries (-rw-rw-rw-) else, it means we care about security,
* and then set to -rw-rw----
*/
if ((asus_uid == 0) && (asus_gid == 0)){
mode = S_IFREG | S_IRUGO | S_IWUGO;
} else {
mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
}
acpi_device_dir(device) = asus_proc_dir;
if (!acpi_device_dir(device))
return -ENODEV;
proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
if (proc) {
proc->read_proc = proc_read_info;
proc->data = acpi_driver_data(device);
proc->owner = THIS_MODULE;
proc->uid = asus_uid;
proc->gid = asus_gid;
} else {
printk(KERN_WARNING " Unable to create " PROC_INFO
" fs entry\n");
}
if (hotk->methods->mt_wled) {
asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled, mode, device);
}
if (hotk->methods->mt_mled) {
asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled, mode, device);
}
if (hotk->methods->mt_tled) {
asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled, mode, device);
}
/*
* We need both read node and write method as LCD switch is also accessible
* from keyboard
*/
if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode, device);
}
if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
(hotk->methods->brightness_get && hotk->methods->brightness_set)) {
asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode, device);
}
if (hotk->methods->display_set) {
asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp, mode, device);
}
return 0;
}
static int asus_hotk_remove_fs(struct acpi_device* device)
{
if(acpi_device_dir(device)) {
remove_proc_entry(PROC_INFO,acpi_device_dir(device));
if (hotk->methods->mt_wled)
remove_proc_entry(PROC_WLED,acpi_device_dir(device));
if (hotk->methods->mt_mled)
remove_proc_entry(PROC_MLED,acpi_device_dir(device));
if (hotk->methods->mt_tled)
remove_proc_entry(PROC_TLED,acpi_device_dir(device));
if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
remove_proc_entry(PROC_LCD, acpi_device_dir(device));
if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
(hotk->methods->brightness_get && hotk->methods->brightness_set))
remove_proc_entry(PROC_BRN, acpi_device_dir(device));
if (hotk->methods->display_set)
remove_proc_entry(PROC_DISP, acpi_device_dir(device));
}
return 0;
}
static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
{
/* TODO Find a better way to handle events count.*/
if (!hotk)
return;
if ((event & ~((u32) BR_UP)) < 16) {
hotk->brightness = (event & ~((u32) BR_UP));
} else if ((event & ~((u32) BR_DOWN)) < 16 ) {
hotk->brightness = (event & ~((u32) BR_DOWN));
}
acpi_bus_generate_event(hotk->device, event,
hotk->event_count[event % 128]++);
return;
}
/*
* This function is used to initialize the hotk with right values. In this
* method, we can make all the detection we want, and modify the hotk struct
*/
static int __init asus_hotk_get_info(void)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *model = NULL;
int bsts_result;
acpi_status status;
/*
* Get DSDT headers early enough to allow for differentiating between
* models, but late enough to allow acpi_bus_register_driver() to fail
* before doing anything ACPI-specific. Should we encounter a machine,
* which needs special handling (i.e. its hotkey device has a different
* HID), this bit will be moved. A global variable asus_info contains
* the DSDT header.
*/
status = acpi_get_table(ACPI_TABLE_DSDT, 1, &dsdt);
if (ACPI_FAILURE(status))
printk(KERN_WARNING " Couldn't get the DSDT table header\n");
else
asus_info = (struct acpi_table_header *) dsdt.pointer;
/* We have to write 0 on init this far for all ASUS models */
if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
printk(KERN_ERR " Hotkey initialization failed\n");
return -ENODEV;
}
/* This needs to be called for some laptops to init properly */
if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
printk(KERN_WARNING " Error calling BSTS\n");
else if (bsts_result)
printk(KERN_NOTICE " BSTS called, 0x%02x returned\n", bsts_result);
/* Samsung P30 has a device with a valid _HID whose INIT does not
* return anything. Catch this one and any similar here */
if (buffer.pointer == NULL) {
if (asus_info && /* Samsung P30 */
strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
hotk->model = P30;
printk(KERN_NOTICE " Samsung P30 detected, supported\n");
} else {