summaryrefslogtreecommitdiffstats
path: root/drivers/misc/fujitsu-laptop.c
blob: 3e56203e494720fc4af8bb8f44ed047f81cf1b8a (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
/*-*-linux-c-*-*/

/*
  Copyright (C) 2007,2008 Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
  Copyright (C) 2008 Peter Gruber <nokos@gmx.net>
  Based on earlier work:
    Copyright (C) 2003 Shane Spencer <shane@bogomip.com>
    Adrian Yee <brewt-fujitsu@brewt.org>

  Templated from msi-laptop.c and thinkpad_acpi.c which is copyright
  by its respective authors.

  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., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.
 */

/*
 * fujitsu-laptop.c - Fujitsu laptop support, providing access to additional
 * features made available on a range of Fujitsu laptops including the
 * P2xxx/P5xxx/S6xxx/S7xxx series.
 *
 * This driver exports a few files in /sys/devices/platform/fujitsu-laptop/;
 * others may be added at a later date.
 *
 *   lcd_level - Screen brightness: contains a single integer in the
 *   range 0..7. (rw)
 *
 * In addition to these platform device attributes the driver
 * registers itself in the Linux backlight control subsystem and is
 * available to userspace under /sys/class/backlight/fujitsu-laptop/.
 *
 * Hotkeys present on certain Fujitsu laptops (eg: the S6xxx series) are
 * also supported by this driver.
 *
 * This driver has been tested on a Fujitsu Lifebook S6410 and S7020.  It
 * should work on most P-series and S-series Lifebooks, but YMMV.
 *
 * The module parameter use_alt_lcd_levels switches between different ACPI
 * brightness controls which are used by different Fujitsu laptops.  In most
 * cases the correct method is automatically detected. "use_alt_lcd_levels=1"
 * is applicable for a Fujitsu Lifebook S6410 if autodetection fails.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/backlight.h>
#include <linux/input.h>
#include <linux/kfifo.h>
#include <linux/video_output.h>
#include <linux/platform_device.h>

#define FUJITSU_DRIVER_VERSION "0.4.2"

#define FUJITSU_LCD_N_LEVELS 8

#define ACPI_FUJITSU_CLASS              "fujitsu"
#define ACPI_FUJITSU_HID                "FUJ02B1"
#define ACPI_FUJITSU_DRIVER_NAME	"Fujitsu laptop FUJ02B1 ACPI brightness driver"
#define ACPI_FUJITSU_DEVICE_NAME        "Fujitsu FUJ02B1"
#define ACPI_FUJITSU_HOTKEY_HID 	"FUJ02E3"
#define ACPI_FUJITSU_HOTKEY_DRIVER_NAME "Fujitsu laptop FUJ02E3 ACPI hotkeys driver"
#define ACPI_FUJITSU_HOTKEY_DEVICE_NAME "Fujitsu FUJ02E3"

#define ACPI_FUJITSU_NOTIFY_CODE1     0x80

#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS     0x86
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS     0x87

/* Hotkey details */
#define LOCK_KEY	0x410	/* codes for the keys in the GIRB register */
#define DISPLAY_KEY	0x411	/* keys are mapped to KEY_SCREENLOCK (the key with the key symbol) */
#define ENERGY_KEY	0x412	/* KEY_MEDIA (the key with the laptop symbol, KEY_EMAIL (E key)) */
#define REST_KEY	0x413	/* KEY_SUSPEND (R key) */

#define MAX_HOTKEY_RINGBUFFER_SIZE 100
#define RINGBUFFERSIZE 40

/* Debugging */
#define FUJLAPTOP_LOG	   ACPI_FUJITSU_HID ": "
#define FUJLAPTOP_ERR	   KERN_ERR FUJLAPTOP_LOG
#define FUJLAPTOP_NOTICE   KERN_NOTICE FUJLAPTOP_LOG
#define FUJLAPTOP_INFO	   KERN_INFO FUJLAPTOP_LOG
#define FUJLAPTOP_DEBUG    KERN_DEBUG FUJLAPTOP_LOG

#define FUJLAPTOP_DBG_ALL	  0xffff
#define FUJLAPTOP_DBG_ERROR	  0x0001
#define FUJLAPTOP_DBG_WARN	  0x0002
#define FUJLAPTOP_DBG_INFO	  0x0004
#define FUJLAPTOP_DBG_TRACE	  0x0008

#define dbg_printk(a_dbg_level, format, arg...) \
	do { if (dbg_level & a_dbg_level) \
		printk(FUJLAPTOP_DEBUG "%s: " format, __func__ , ## arg); \
	} while (0)
#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
#define vdbg_printk(a_dbg_level, format, arg...) \
	dbg_printk(a_dbg_level, format, ## arg)
#else
#define vdbg_printk(a_dbg_level, format, arg...)
#endif

/* Device controlling the backlight and associated keys */
struct fujitsu_t {
	acpi_handle acpi_handle;
	struct acpi_device *dev;
	struct input_dev *input;
	char phys[32];
	struct backlight_device *bl_device;
	struct platform_device *pf_device;

	unsigned int max_brightness;
	unsigned int brightness_changed;
	unsigned int brightness_level;
};

static struct fujitsu_t *fujitsu;
static int use_alt_lcd_levels = -1;
static int disable_brightness_keys = -1;
static int disable_brightness_adjust = -1;

/* Device used to access other hotkeys on the laptop */
struct fujitsu_hotkey_t {
	acpi_handle acpi_handle;
	struct acpi_device *dev;
	struct input_dev *input;
	char phys[32];
	struct platform_device *pf_device;
	struct kfifo *fifo;
	spinlock_t fifo_lock;

	unsigned int irb;	/* info about the pressed buttons */
};

static struct fujitsu_hotkey_t *fujitsu_hotkey;

static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
				       void *data);

#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
static u32 dbg_level = 0x03;
#endif

static void acpi_fujitsu_notify(acpi_handle handle, u32 event, void *data);

/* Hardware access for LCD brightness control */

static int set_lcd_level(int level)
{
	acpi_status status = AE_OK;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list arg_list = { 1, &arg0 };
	acpi_handle handle = NULL;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBLL [%d]\n",
		    level);

	if (level < 0 || level >= fujitsu->max_brightness)
		return -EINVAL;

	if (!fujitsu)
		return -EINVAL;

	status = acpi_get_handle(fujitsu->acpi_handle, "SBLL", &handle);
	if (ACPI_FAILURE(status)) {
		vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBLL not present\n");
		return -ENODEV;
	}

	arg0.integer.value = level;

	status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return 0;
}

static int set_lcd_level_alt(int level)
{
	acpi_status status = AE_OK;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list arg_list = { 1, &arg0 };
	acpi_handle handle = NULL;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBL2 [%d]\n",
		    level);

	if (level < 0 || level >= fujitsu->max_brightness)
		return -EINVAL;

	if (!fujitsu)
		return -EINVAL;

	status = acpi_get_handle(fujitsu->acpi_handle, "SBL2", &handle);
	if (ACPI_FAILURE(status)) {
		vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBL2 not present\n");
		return -ENODEV;
	}

	arg0.integer.value = level;

	status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return 0;
}

static int get_lcd_level(void)
{
	unsigned long state = 0;
	acpi_status status = AE_OK;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLL\n");

	status =
	    acpi_evaluate_integer(fujitsu->acpi_handle, "GBLL", NULL, &state);
	if (status < 0)
		return status;

	fujitsu->brightness_level = state & 0x0fffffff;

	if (state & 0x80000000)
		fujitsu->brightness_changed = 1;
	else
		fujitsu->brightness_changed = 0;

	return fujitsu->brightness_level;
}

static int get_max_brightness(void)
{
	unsigned long state = 0;
	acpi_status status = AE_OK;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get max lcd level via RBLL\n");

	status =
	    acpi_evaluate_integer(fujitsu->acpi_handle, "RBLL", NULL, &state);
	if (status < 0)
		return status;

	fujitsu->max_brightness = state;

	return fujitsu->max_brightness;
}

static int get_lcd_level_alt(void)
{
	unsigned long state = 0;
	acpi_status status = AE_OK;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLS\n");

	status =
	    acpi_evaluate_integer(fujitsu->acpi_handle, "GBLS", NULL, &state);
	if (status < 0)
		return status;

	fujitsu->brightness_level = state & 0x0fffffff;

	if (state & 0x80000000)
		fujitsu->brightness_changed = 1;
	else
		fujitsu->brightness_changed = 0;

	return fujitsu->brightness_level;
}

/* Backlight device stuff */

static int bl_get_brightness(struct backlight_device *b)
{
	if (use_alt_lcd_levels)
		return get_lcd_level_alt();
	else
		return get_lcd_level();
}

static int bl_update_status(struct backlight_device *b)
{
	if (use_alt_lcd_levels)
		return set_lcd_level_alt(b->props.brightness);
	else
		return set_lcd_level(b->props.brightness);
}

static struct backlight_ops fujitsubl_ops = {
	.get_brightness = bl_get_brightness,
	.update_status = bl_update_status,
};

/* Platform LCD brightness device */

static ssize_t
show_max_brightness(struct device *dev,
		    struct device_attribute *attr, char *buf)
{

	int ret;

	ret = get_max_brightness();
	if (ret < 0)
		return ret;

	return sprintf(buf, "%i\n", ret);
}

static ssize_t
show_brightness_changed(struct device *dev,
			struct device_attribute *attr, char *buf)
{

	int ret;

	ret = fujitsu->brightness_changed;
	if (ret < 0)
		return ret;

	return sprintf(buf, "%i\n", ret);
}

static ssize_t show_lcd_level(struct device *dev,
			      struct device_attribute *attr, char *buf)
{

	int ret;

	if (use_alt_lcd_levels)
		ret = get_lcd_level_alt();
	else
		ret = get_lcd_level();
	if (ret < 0)
		return ret;

	return sprintf(buf, "%i\n", ret);
}

static ssize_t store_lcd_level(struct device *dev,
			       struct device_attribute *attr, const char *buf,
			       size_t count)
{

	int level, ret;

	if (sscanf(buf, "%i", &level) != 1
	    || (level < 0 || level >= fujitsu->max_brightness))
		return -EINVAL;

	if (use_alt_lcd_levels)
		ret = set_lcd_level_alt(level);
	else
		ret = set_lcd_level(level);
	if (ret < 0)
		return ret;

	if (use_alt_lcd_levels)
		ret = get_lcd_level_alt();
	else
		ret = get_lcd_level();
	if (ret < 0)
		return ret;

	return count;
}

/* Hardware access for hotkey device */

static int get_irb(void)
{
	unsigned long state = 0;
	acpi_status status = AE_OK;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "Get irb\n");

	status =
	    acpi_evaluate_integer(fujitsu_hotkey->acpi_handle, "GIRB", NULL,
				  &state);
	if (status < 0)
		return status;

	fujitsu_hotkey->irb = state;

	return fujitsu_hotkey->irb;
}

static ssize_t
ignore_store(struct device *dev,
	     struct device_attribute *attr, const char *buf, size_t count)
{
	return count;
}

static DEVICE_ATTR(max_brightness, 0444, show_max_brightness, ignore_store);
static DEVICE_ATTR(brightness_changed, 0444, show_brightness_changed,
		   ignore_store);
static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);

static struct attribute *fujitsupf_attributes[] = {
	&dev_attr_brightness_changed.attr,
	&dev_attr_max_brightness.attr,
	&dev_attr_lcd_level.attr,
	NULL
};

static struct attribute_group fujitsupf_attribute_group = {
	.attrs = fujitsupf_attributes
};

static struct platform_driver fujitsupf_driver = {
	.driver = {
		   .name = "fujitsu-laptop",
		   .owner = THIS_MODULE,
		   }
};

static int dmi_check_cb_s6410(const struct dmi_system_id *id)
{
	acpi_handle handle;
	int have_blnf;
	printk(KERN_INFO "fujitsu-laptop: Identified laptop model '%s'.\n",
	       id->ident);
	have_blnf = ACPI_SUCCESS
	    (acpi_get_handle(NULL, "\\_SB.PCI0.GFX0.LCD.BLNF", &handle));
	if (use_alt_lcd_levels == -1) {
		vdbg_printk(FUJLAPTOP_DBG_TRACE, "auto-detecting usealt\n");
		use_alt_lcd_levels = 1;
	}
	if (disable_brightness_keys == -1) {
		vdbg_printk(FUJLAPTOP_DBG_TRACE,
			    "auto-detecting disable_keys\n");
		disable_brightness_keys = have_blnf ? 1 : 0;
	}
	if (disable_brightness_adjust == -1) {
		vdbg_printk(FUJLAPTOP_DBG_TRACE,
			    "auto-detecting disable_adjust\n");
		disable_brightness_adjust = have_blnf ? 0 : 1;
	}
	return 0;
}

static struct dmi_system_id __initdata fujitsu_dmi_table[] = {
	{
	 .ident = "Fujitsu Siemens",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
		     },
	 .callback = dmi_check_cb_s6410},
	{
	 .ident = "FUJITSU LifeBook P8010",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
		    },
	 .callback = dmi_check_cb_s6410},
	{}
};

/* ACPI device for LCD brightness control */

static int acpi_fujitsu_add(struct acpi_device *device)
{
	acpi_status status;
	acpi_handle handle;
	int result = 0;
	int state = 0;
	struct input_dev *input;
	int error;

	if (!device)
		return -EINVAL;

	fujitsu->acpi_handle = device->handle;
	sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_DEVICE_NAME);
	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
	acpi_driver_data(device) = fujitsu;

	status = acpi_install_notify_handler(device->handle,
					     ACPI_DEVICE_NOTIFY,
					     acpi_fujitsu_notify, fujitsu);

	if (ACPI_FAILURE(status)) {
		printk(KERN_ERR "Error installing notify handler\n");
		error = -ENODEV;
		goto err_stop;
	}

	fujitsu->input = input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto err_uninstall_notify;
	}

	snprintf(fujitsu->phys, sizeof(fujitsu->phys),
		 "%s/video/input0", acpi_device_hid(device));

	input->name = acpi_device_name(device);
	input->phys = fujitsu->phys;
	input->id.bustype = BUS_HOST;
	input->id.product = 0x06;
	input->dev.parent = &device->dev;
	input->evbit[0] = BIT(EV_KEY);
	set_bit(KEY_BRIGHTNESSUP, input->keybit);
	set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
	set_bit(KEY_UNKNOWN, input->keybit);

	error = input_register_device(input);
	if (error)
		goto err_free_input_dev;

	result = acpi_bus_get_power(fujitsu->acpi_handle, &state);
	if (result) {
		printk(KERN_ERR "Error reading power state\n");
		goto end;
	}

	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(device), acpi_device_bid(device),
	       !device->power.state ? "on" : "off");

	fujitsu->dev = device;

	if (ACPI_SUCCESS
	    (acpi_get_handle(device->handle, METHOD_NAME__INI, &handle))) {
		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
		if (ACPI_FAILURE
		    (acpi_evaluate_object
		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
			printk(KERN_ERR "_INI Method failed\n");
	}

	/* do config (detect defaults) */
	dmi_check_system(fujitsu_dmi_table);
	use_alt_lcd_levels = use_alt_lcd_levels == 1 ? 1 : 0;
	disable_brightness_keys = disable_brightness_keys == 1 ? 1 : 0;
	disable_brightness_adjust = disable_brightness_adjust == 1 ? 1 : 0;
	vdbg_printk(FUJLAPTOP_DBG_INFO,
		    "config: [alt interface: %d], [key disable: %d], [adjust disable: %d]\n",
		    use_alt_lcd_levels, disable_brightness_keys,
		    disable_brightness_adjust);

	if (get_max_brightness() <= 0)
		fujitsu->max_brightness = FUJITSU_LCD_N_LEVELS;
	if (use_alt_lcd_levels)
		get_lcd_level_alt();
	else
		get_lcd_level();

	return result;

end:
err_free_input_dev:
	input_free_device(input);
err_uninstall_notify:
	acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
				   acpi_fujitsu_notify);
err_stop:

	return result;
}

static int acpi_fujitsu_remove(struct acpi_device *device, int type)
{
	acpi_status status;
	struct fujitsu_t *fujitsu = NULL;

	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	fujitsu = acpi_driver_data(device);

	status = acpi_remove_notify_handler(fujitsu->acpi_handle,
					    ACPI_DEVICE_NOTIFY,
					    acpi_fujitsu_notify);

	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	fujitsu->acpi_handle = NULL;

	return 0;
}

/* Brightness notify */

static void acpi_fujitsu_notify(acpi_handle handle, u32 event, void *data)
{
	struct input_dev *input;
	int keycode;
	int oldb, newb;

	input = fujitsu->input;

	switch (event) {
	case ACPI_FUJITSU_NOTIFY_CODE1:
		keycode = 0;
		oldb = fujitsu->brightness_level;
		get_lcd_level();  /* the alt version always yields changed */
		newb = fujitsu->brightness_level;

		vdbg_printk(FUJLAPTOP_DBG_TRACE,
			    "brightness button event [%i -> %i (%i)]\n",
			    oldb, newb, fujitsu->brightness_changed);

		if (oldb == newb && fujitsu->brightness_changed) {
			keycode = 0;
			if (disable_brightness_keys != 1) {
				if (oldb == 0) {
					acpi_bus_generate_proc_event(fujitsu->
						dev,
						ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS,
						0);
					keycode = KEY_BRIGHTNESSDOWN;
				} else if (oldb ==
					   (fujitsu->max_brightness) - 1) {
					acpi_bus_generate_proc_event(fujitsu->
						dev,
						ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS,
						0);
					keycode = KEY_BRIGHTNESSUP;
				}
			}
		} else if (oldb < newb) {
			if (disable_brightness_adjust != 1) {
				if (use_alt_lcd_levels)
					set_lcd_level_alt(newb);
				else
					set_lcd_level(newb);
			}
			if (disable_brightness_keys != 1) {
				acpi_bus_generate_proc_event(fujitsu->dev,
					ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS,
					0);
				keycode = KEY_BRIGHTNESSUP;
			}
		} else if (oldb > newb) {
			if (disable_brightness_adjust != 1) {
				if (use_alt_lcd_levels)
					set_lcd_level_alt(newb);
				else
					set_lcd_level(newb);
			}
			if (disable_brightness_keys != 1) {
				acpi_bus_generate_proc_event(fujitsu->dev,
					ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS,
					0);
				keycode = KEY_BRIGHTNESSDOWN;
			}
		} else {
			keycode = KEY_UNKNOWN;
		}
		break;
	default:
		keycode = KEY_UNKNOWN;
		vdbg_printk(FUJLAPTOP_DBG_WARN,
			    "unsupported event [0x%x]\n", event);
		break;
	}

	if (keycode != 0) {
		input_report_key(input, keycode, 1);
		input_sync(input);
		input_report_key(input, keycode, 0);
		input_sync(input);
	}

	return;
}

/* ACPI device for hotkey handling */

static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
{
	acpi_status status;
	acpi_handle handle;
	int result = 0;
	int state = 0;
	struct input_dev *input;
	int error;
	int i;

	if (!device)
		return -EINVAL;

	fujitsu_hotkey->acpi_handle = device->handle;
	sprintf(acpi_device_name(device), "%s",
		ACPI_FUJITSU_HOTKEY_DEVICE_NAME);
	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
	acpi_driver_data(device) = fujitsu_hotkey;

	status = acpi_install_notify_handler(device->handle,
					     ACPI_DEVICE_NOTIFY,
					     acpi_fujitsu_hotkey_notify,
					     fujitsu_hotkey);

	if (ACPI_FAILURE(status)) {
		printk(KERN_ERR "Error installing notify handler\n");
		error = -ENODEV;
		goto err_stop;
	}

	/* kfifo */
	spin_lock_init(&fujitsu_hotkey->fifo_lock);
	fujitsu_hotkey->fifo =
	    kfifo_alloc(RINGBUFFERSIZE * sizeof(int), GFP_KERNEL,
			&fujitsu_hotkey->fifo_lock);
	if (IS_ERR(fujitsu_hotkey->fifo)) {
		printk(KERN_ERR "kfifo_alloc failed\n");
		error = PTR_ERR(fujitsu_hotkey->fifo);
		goto err_stop;
	}

	fujitsu_hotkey->input = input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto err_uninstall_notify;
	}

	snprintf(fujitsu_hotkey->phys, sizeof(fujitsu_hotkey->phys),
		 "%s/video/input0", acpi_device_hid(device));

	input->name = acpi_device_name(device);
	input->phys = fujitsu_hotkey->phys;
	input->id.bustype = BUS_HOST;
	input->id.product = 0x06;
	input->dev.parent = &device->dev;
	input->evbit[0] = BIT(EV_KEY);
	set_bit(KEY_SCREENLOCK, input->keybit);
	set_bit(KEY_MEDIA, input->keybit);
	set_bit(KEY_EMAIL, input->keybit);
	set_bit(KEY_SUSPEND, input->keybit);
	set_bit(KEY_UNKNOWN, input->keybit);

	error = input_register_device(input);
	if (error)
		goto err_free_input_dev;

	result = acpi_bus_get_power(fujitsu_hotkey->acpi_handle, &state);
	if (result) {
		printk(KERN_ERR "Error reading power state\n");
		goto end;
	}

	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(device), acpi_device_bid(device),
	       !device->power.state ? "on" : "off");

	fujitsu_hotkey->dev = device;

	if (ACPI_SUCCESS
	    (acpi_get_handle(device->handle, METHOD_NAME__INI, &handle))) {
		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
		if (ACPI_FAILURE
		    (acpi_evaluate_object
		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
			printk(KERN_ERR "_INI Method failed\n");
	}

	i = 0;			/* Discard hotkey ringbuffer */
	while (get_irb() != 0 && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) ;
	vdbg_printk(FUJLAPTOP_DBG_INFO, "Discarded %i ringbuffer entries\n", i);

	return result;

end:
err_free_input_dev:
	input_free_device(input);
err_uninstall_notify:
	acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
				   acpi_fujitsu_hotkey_notify);
	kfifo_free(fujitsu_hotkey->fifo);
err_stop:

	return result;
}

static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
{
	acpi_status status;
	struct fujitsu_hotkey_t *fujitsu_hotkey = NULL;

	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	fujitsu_hotkey = acpi_driver_data(device);

	status = acpi_remove_notify_handler(fujitsu_hotkey->acpi_handle,
					    ACPI_DEVICE_NOTIFY,
					    acpi_fujitsu_hotkey_notify);

	fujitsu_hotkey->acpi_handle = NULL;

	kfifo_free(fujitsu_hotkey->fifo);

	return 0;
}

static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
				       void *data)
{
	struct input_dev *input;
	int keycode, keycode_r;
	unsigned int irb = 1;
	int i, status;

	input = fujitsu_hotkey->input;

	vdbg_printk(FUJLAPTOP_DBG_TRACE, "Hotkey event\n");

	switch (event) {
	case ACPI_FUJITSU_NOTIFY_CODE1:
		i = 0;
		while ((irb = get_irb()) != 0
		       && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) {
			vdbg_printk(FUJLAPTOP_DBG_TRACE, "GIRB result [%x]\n",
				    irb);

			switch (irb & 0x4ff) {
			case LOCK_KEY:
				keycode = KEY_SCREENLOCK;
				break;
			case DISPLAY_KEY:
				keycode = KEY_MEDIA;
				break;
			case ENERGY_KEY:
				keycode = KEY_EMAIL;
				break;
			case REST_KEY:
				keycode = KEY_SUSPEND;
				break;
			case 0:
				keycode = 0;
				break;
			default:
				vdbg_printk(FUJLAPTOP_DBG_WARN,
					"Unknown GIRB result [%x]\n", irb);
				keycode = -1;
				break;
			}
			if (keycode > 0) {
				vdbg_printk(FUJLAPTOP_DBG_TRACE,
					"Push keycode into ringbuffer [%d]\n",
					keycode);
				status = kfifo_put(fujitsu_hotkey->fifo,
						(unsigned char *)&keycode,
						sizeof(keycode));
				if (status != sizeof(keycode)) {
					vdbg_printk(FUJLAPTOP_DBG_WARN,
						"Could not push keycode [0x%x]\n",
						keycode);
				} else {
					input_report_key(input, keycode, 1);
					input_sync(input);
				}
			} else if (keycode == 0) {
				while ((status =
					kfifo_get
					(fujitsu_hotkey->fifo, (unsigned char *)
					 &keycode_r,
					 sizeof
					 (keycode_r))) == sizeof(keycode_r)) {
					input_report_key(input, keycode_r, 0);
					input_sync(input);
					vdbg_printk(FUJLAPTOP_DBG_TRACE,
						    "Pop keycode from ringbuffer [%d]\n",
						    keycode_r);
				}
			}
		}

		break;
	default:
		keycode = KEY_UNKNOWN;
		vdbg_printk(FUJLAPTOP_DBG_WARN,
			    "Unsupported event [0x%x]\n", event);
		input_report_key(input, keycode, 1);
		input_sync(input);
		input_report_key(input, keycode, 0);
		input_sync(input);
		break;
	}

	return;
}

/* Initialization */

static const struct acpi_device_id fujitsu_device_ids[] = {
	{ACPI_FUJITSU_HID, 0},
	{"", 0},
};

static struct acpi_driver acpi_fujitsu_driver = {
	.name = ACPI_FUJITSU_DRIVER_NAME,
	.class = ACPI_FUJITSU_CLASS,
	.ids = fujitsu_device_ids,
	.ops = {
		.add = acpi_fujitsu_add,
		.remove = acpi_fujitsu_remove,
		},
};

static const struct acpi_device_id fujitsu_hotkey_device_ids[] = {
	{ACPI_FUJITSU_HOTKEY_HID, 0},
	{"", 0},
};

static struct acpi_driver acpi_fujitsu_hotkey_driver = {
	.name = ACPI_FUJITSU_HOTKEY_DRIVER_NAME,
	.class = ACPI_FUJITSU_CLASS,
	.ids = fujitsu_hotkey_device_ids,
	.ops = {
		.add = acpi_fujitsu_hotkey_add,
		.remove = acpi_fujitsu_hotkey_remove,
		},
};

static int __init fujitsu_init(void)
{
	int ret, result, max_brightness;

	if (acpi_disabled)
		return -ENODEV;

	fujitsu = kmalloc(sizeof(struct fujitsu_t), GFP_KERNEL);
	if (!fujitsu)
		return -ENOMEM;
	memset(fujitsu, 0, sizeof(struct fujitsu_t));

	result = acpi_bus_register_driver(&acpi_fujitsu_driver);
	if (result < 0) {
		ret = -ENODEV;
		goto fail_acpi;
	}

	/* Register platform stuff */

	fujitsu->pf_device = platform_device_alloc("fujitsu-laptop", -1);
	if (!fujitsu->pf_device) {
		ret = -ENOMEM;
		goto fail_platform_driver;
	}

	ret = platform_device_add(fujitsu->pf_device);
	if (ret)
		goto fail_platform_device1;

	ret =
	    sysfs_create_group(&fujitsu->pf_device->dev.kobj,
			       &fujitsupf_attribute_group);
	if (ret)
		goto fail_platform_device2;

	/* Register backlight stuff */

	fujitsu->bl_device =
	    backlight_device_register("fujitsu-laptop", NULL, NULL,
				      &fujitsubl_ops);
	if (IS_ERR(fujitsu->bl_device))
		return PTR_ERR(fujitsu->bl_device);

	max_brightness = fujitsu->max_brightness;

	fujitsu->bl_device->props.max_brightness = max_brightness - 1;
	fujitsu->bl_device->props.brightness = fujitsu->brightness_level;

	ret = platform_driver_register(&fujitsupf_driver);
	if (ret)
		goto fail_backlight;

	/* Register hotkey driver */

	fujitsu_hotkey = kmalloc(sizeof(struct fujitsu_hotkey_t), GFP_KERNEL);
	if (!fujitsu_hotkey) {
		ret = -ENOMEM;
		goto fail_hotkey;
	}
	memset(fujitsu_hotkey, 0, sizeof(struct fujitsu_hotkey_t));

	result = acpi_bus_register_driver(&acpi_fujitsu_hotkey_driver);
	if (result < 0) {
		ret = -ENODEV;
		goto fail_hotkey1;
	}

	printk(KERN_INFO "fujitsu-laptop: driver " FUJITSU_DRIVER_VERSION
	       " successfully loaded.\n");

	return 0;

fail_hotkey1:

	kfree(fujitsu_hotkey);

fail_hotkey:

	platform_driver_unregister(&fujitsupf_driver);

fail_backlight:

	backlight_device_unregister(fujitsu->bl_device);

fail_platform_device2:

	platform_device_del(fujitsu->pf_device);

fail_platform_device1:

	platform_device_put(fujitsu->pf_device);

fail_platform_driver:

	acpi_bus_unregister_driver(&acpi_fujitsu_driver);

fail_acpi:

	kfree(fujitsu);

	return ret;
}

static void __exit fujitsu_cleanup(void)
{
	sysfs_remove_group(&fujitsu->pf_device->dev.kobj,
			   &fujitsupf_attribute_group);
	platform_device_unregister(fujitsu->pf_device);
	platform_driver_unregister(&fujitsupf_driver);
	backlight_device_unregister(fujitsu->bl_device);

	acpi_bus_unregister_driver(&acpi_fujitsu_driver);

	kfree(fujitsu);

	acpi_bus_unregister_driver(&acpi_fujitsu_hotkey_driver);

	kfree(fujitsu_hotkey);

	printk(KERN_INFO "fujitsu-laptop: driver unloaded.\n");
}

module_init(fujitsu_init);
module_exit(fujitsu_cleanup);

module_param(use_alt_lcd_levels, uint, 0644);
MODULE_PARM_DESC(use_alt_lcd_levels,
		 "Use alternative interface for lcd_levels (needed for Lifebook s6410).");
module_param(disable_brightness_keys, uint, 0644);
MODULE_PARM_DESC(disable_brightness_keys,
		 "Disable brightness keys (eg. if they are already handled by the generic ACPI_VIDEO device).");
module_param(disable_brightness_adjust, uint, 0644);
MODULE_PARM_DESC(disable_brightness_adjust, "Disable brightness adjustment .");
#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
module_param_named(debug, dbg_level, uint, 0644);
MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
#endif

MODULE_AUTHOR("Jonathan Woithe, Peter Gruber");
MODULE_DESCRIPTION("Fujitsu laptop extras support");
MODULE_VERSION(FUJITSU_DRIVER_VERSION);
MODULE_LICENSE("GPL");

MODULE_ALIAS
    ("dmi:*:svnFUJITSUSIEMENS:*:pvr:rvnFUJITSU:rnFJNB1D3:*:cvrS6410:*");
MODULE_ALIAS
    ("dmi:*:svnFUJITSU:*:pvr:rvnFUJITSU:rnFJNB19C:*:cvrS7020:*");

static struct pnp_device_id pnp_ids[] = {
	{ .id = "FUJ02bf" },
	{ .id = "FUJ02B1" },
	{ .id = "FUJ02E3" },
	{ .id = "" }
};
MODULE_DEVICE_TABLE(pnp, pnp_ids);