aboutsummaryrefslogtreecommitdiffstats
path: root/sound/oss/dmasound/tas3001c.c
blob: 2f21a3c00374ad2b40e40482ab1aff41594f9a09 (plain) (blame)
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
/*
 * Driver for the i2c/i2s based TA3004 sound chip used
 * on some Apple hardware. Also known as "snapper".
 *
 * Tobias Sargeant <tobias.sargeant@bigpond.com>
 * Based upon, tas3001c.c by Christopher C. Chimelis <chris@debian.org>:
 *
 *   TODO:
 *   -----
 *   * Enable control over input line 2 (is this connected?)
 *   * Implement sleep support (at least mute everything and
 *   * set gains to minimum during sleep)
 *   * Look into some of Darwin's tweaks regarding the mute
 *   * lines (delays & different behaviour on some HW)
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <linux/sysctl.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/soundcard.h>
#include <linux/workqueue.h>
#include <asm/uaccess.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/prom.h>

#include "dmasound.h"
#include "tas_common.h"
#include "tas3001c.h"

#include "tas_ioctl.h"

#define TAS3001C_BIQUAD_FILTER_COUNT  6
#define TAS3001C_BIQUAD_CHANNEL_COUNT 2

#define VOL_DEFAULT	(100 * 4 / 5)
#define INPUT_DEFAULT	(100 * 4 / 5)
#define BASS_DEFAULT	(100 / 2)
#define TREBLE_DEFAULT	(100 / 2)

struct tas3001c_data_t {
	struct tas_data_t super;
	int device_id;
	int output_id;
	int speaker_id;
	struct tas_drce_t drce_state;
	struct work_struct change;
};


static const union tas_biquad_t
tas3001c_eq_unity={
	.buf = { 0x100000, 0x000000, 0x000000, 0x000000, 0x000000 }
};


static inline unsigned char db_to_regval(short db) {
	int r=0;

	r=(db+0x59a0) / 0x60;

	if (r < 0x91) return 0x91;
	if (r > 0xef) return 0xef;
	return r;
}

static inline short quantize_db(short db) {
	return db_to_regval(db) * 0x60 - 0x59a0;
}


static inline int
register_width(enum tas3001c_reg_t r)
{
	switch(r) {
	case TAS3001C_REG_MCR:
 	case TAS3001C_REG_TREBLE:
	case TAS3001C_REG_BASS:
		return 1;

	case TAS3001C_REG_DRC:
		return 2;

	case TAS3001C_REG_MIXER1:
	case TAS3001C_REG_MIXER2:
		return 3;

	case TAS3001C_REG_VOLUME:
		return 6;

	case TAS3001C_REG_LEFT_BIQUAD0:
	case TAS3001C_REG_LEFT_BIQUAD1:
	case TAS3001C_REG_LEFT_BIQUAD2:
	case TAS3001C_REG_LEFT_BIQUAD3:
	case TAS3001C_REG_LEFT_BIQUAD4:
	case TAS3001C_REG_LEFT_BIQUAD5:
	case TAS3001C_REG_LEFT_BIQUAD6:

	case TAS3001C_REG_RIGHT_BIQUAD0:
	case TAS3001C_REG_RIGHT_BIQUAD1:
	case TAS3001C_REG_RIGHT_BIQUAD2:
	case TAS3001C_REG_RIGHT_BIQUAD3:
	case TAS3001C_REG_RIGHT_BIQUAD4:
	case TAS3001C_REG_RIGHT_BIQUAD5:
	case TAS3001C_REG_RIGHT_BIQUAD6:
		return 15;

	default:
		return 0;
	}
}

static int
tas3001c_write_register(	struct tas3001c_data_t *self,
				enum tas3001c_reg_t reg_num,
				char *data,
				uint write_mode)
{
	if (reg_num==TAS3001C_REG_MCR ||
	    reg_num==TAS3001C_REG_BASS ||
	    reg_num==TAS3001C_REG_TREBLE) {
		return tas_write_byte_register(&self->super,
					       (uint)reg_num,
					       *data,
					       write_mode);
	} else {
		return tas_write_register(&self->super,
					  (uint)reg_num,
					  register_width(reg_num),
					  data,
					  write_mode);
	}
}

static int
tas3001c_sync_register(	struct tas3001c_data_t *self,
			enum tas3001c_reg_t reg_num)
{
	if (reg_num==TAS3001C_REG_MCR ||
	    reg_num==TAS3001C_REG_BASS ||
	    reg_num==TAS3001C_REG_TREBLE) {
		return tas_sync_byte_register(&self->super,
					      (uint)reg_num,
					      register_width(reg_num));
	} else {
		return tas_sync_register(&self->super,
					 (uint)reg_num,
					 register_width(reg_num));
	}
}

static int
tas3001c_read_register(	struct tas3001c_data_t *self,
			enum tas3001c_reg_t reg_num,
			char *data,
			uint write_mode)
{
	return tas_read_register(&self->super,
				 (uint)reg_num,
				 register_width(reg_num),
				 data);
}

static inline int
tas3001c_fast_load(struct tas3001c_data_t *self, int fast)
{
	if (fast)
		self->super.shadow[TAS3001C_REG_MCR][0] |= 0x80;
	else
		self->super.shadow[TAS3001C_REG_MCR][0] &= 0x7f;
	return tas3001c_sync_register(self,TAS3001C_REG_MCR);
}

static uint
tas3001c_supported_mixers(struct tas3001c_data_t *self)
{
	return SOUND_MASK_VOLUME |
		SOUND_MASK_PCM |
		SOUND_MASK_ALTPCM |
		SOUND_MASK_TREBLE |
		SOUND_MASK_BASS;
}

static int
tas3001c_mixer_is_stereo(struct tas3001c_data_t *self,int mixer)
{
	switch(mixer) {
	case SOUND_MIXER_VOLUME:
		return 1;
	default:
		return 0;
	}
}

static uint
tas3001c_stereo_mixers(struct tas3001c_data_t *self)
{
	uint r=tas3001c_supported_mixers(self);
	uint i;
	
	for (i=1; i<SOUND_MIXER_NRDEVICES; i++)
		if (r&(1<<i) && !tas3001c_mixer_is_stereo(self,i))
			r &= ~(1<<i);
	return r;
}

static int
tas3001c_get_mixer_level(struct tas3001c_data_t *self,int mixer,uint *level)
{
	if (!self)
		return -1;
		
	*level=self->super.mixer[mixer];
	
	return 0;
}

static int
tas3001c_set_mixer_level(struct tas3001c_data_t *self,int mixer,uint level)
{
	int rc;
	tas_shadow_t *shadow;

	uint temp;
	uint offset=0;

	if (!self)
		return -1;
		
	shadow=self->super.shadow;

	if (!tas3001c_mixer_is_stereo(self,mixer))
		level = tas_mono_to_stereo(level);

	switch(mixer) {
	case SOUND_MIXER_VOLUME:
		temp = tas3001c_gain.master[level&0xff];
		shadow[TAS3001C_REG_VOLUME][0] = (temp >> 16) & 0xff;
		shadow[TAS3001C_REG_VOLUME][1] = (temp >> 8)  & 0xff;
		shadow[TAS3001C_REG_VOLUME][2] = (temp >> 0)  & 0xff;
		temp = tas3001c_gain.master[(level>>8)&0xff];
		shadow[TAS3001C_REG_VOLUME][3] = (temp >> 16) & 0xff;
		shadow[TAS3001C_REG_VOLUME][4] = (temp >> 8)  & 0xff;
		shadow[TAS3001C_REG_VOLUME][5] = (temp >> 0)  & 0xff;
		rc = tas3001c_sync_register(self,TAS3001C_REG_VOLUME);
		break;
	case SOUND_MIXER_ALTPCM:
		/* tas3001c_fast_load(self, 1); */
		level = tas_mono_to_stereo(level);
		temp = tas3001c_gain.mixer[level&0xff];
		shadow[TAS3001C_REG_MIXER2][offset+0] = (temp >> 16) & 0xff;
		shadow[TAS3001C_REG_MIXER2][offset+1] = (temp >> 8)  & 0xff;
		shadow[TAS3001C_REG_MIXER2][offset+2] = (temp >> 0)  & 0xff;
		rc = tas3001c_sync_register(self,TAS3001C_REG_MIXER2);
		/* tas3001c_fast_load(self, 0); */
		break;
	case SOUND_MIXER_PCM:
		/* tas3001c_fast_load(self, 1); */
		level = tas_mono_to_stereo(level);
		temp = tas3001c_gain.mixer[level&0xff];
		shadow[TAS3001C_REG_MIXER1][offset+0] = (temp >> 16) & 0xff;
		shadow[TAS3001C_REG_MIXER1][offset+1] = (temp >> 8)  & 0xff;
		shadow[TAS3001C_REG_MIXER1][offset+2] = (temp >> 0)  & 0xff;
		rc = tas3001c_sync_register(self,TAS3001C_REG_MIXER1);
		/* tas3001c_fast_load(self, 0); */
		break;
	case SOUND_MIXER_TREBLE:
		temp = tas3001c_gain.treble[level&0xff];
		shadow[TAS3001C_REG_TREBLE][0]=temp&0xff;
		rc = tas3001c_sync_register(self,TAS3001C_REG_TREBLE);
		break;
	case SOUND_MIXER_BASS:
		temp = tas3001c_gain.bass[level&0xff];
		shadow[TAS3001C_REG_BASS][0]=temp&0xff;
		rc = tas3001c_sync_register(self,TAS3001C_REG_BASS);
		break;
	default:
		rc = -1;
		break;
	}
	if (rc < 0)
		return rc;
	self->super.mixer[mixer]=level;
	return 0;
}

static int
tas3001c_leave_sleep(struct tas3001c_data_t *self)
{
	unsigned char mcr = (1<<6)+(2<<4)+(2<<2);

	if (!self)
		return -1;

	/* Make sure something answers on the i2c bus */
	if (tas3001c_write_register(self, TAS3001C_REG_MCR, &mcr,
	    WRITE_NORMAL|FORCE_WRITE) < 0)
	    	return -1;

	tas3001c_fast_load(self, 1);

	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD0);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD1);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD2);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD3);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD4);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD5);

	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD0);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD1);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD2);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD3);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD4);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD5);

	tas3001c_fast_load(self, 0);

	(void)tas3001c_sync_register(self,TAS3001C_REG_BASS);
	(void)tas3001c_sync_register(self,TAS3001C_REG_TREBLE);
	(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER1);
	(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER2);
	(void)tas3001c_sync_register(self,TAS3001C_REG_VOLUME);

	return 0;
}

static int
tas3001c_enter_sleep(struct tas3001c_data_t *self)
{
	/* Stub for now, but I have the details on low-power mode */
	if (!self)
		return -1; 
	return 0;
}

static int
tas3001c_sync_biquad(	struct tas3001c_data_t *self,
			u_int channel,
			u_int filter)
{
	enum tas3001c_reg_t reg;

	if (channel >= TAS3001C_BIQUAD_CHANNEL_COUNT ||
	    filter  >= TAS3001C_BIQUAD_FILTER_COUNT) return -EINVAL;

	reg=( channel ? TAS3001C_REG_RIGHT_BIQUAD0 : TAS3001C_REG_LEFT_BIQUAD0 ) + filter;

	return tas3001c_sync_register(self,reg);
}

static int
tas3001c_write_biquad_shadow(	struct tas3001c_data_t *self,
				u_int channel,
				u_int filter,
				const union tas_biquad_t *biquad)
{
	tas_shadow_t *shadow=self->super.shadow;
	enum tas3001c_reg_t reg;

	if (channel >= TAS3001C_BIQUAD_CHANNEL_COUNT ||
	    filter  >= TAS3001C_BIQUAD_FILTER_COUNT) return -EINVAL;

	reg=( channel ? TAS3001C_REG_RIGHT_BIQUAD0 : TAS3001C_REG_LEFT_BIQUAD0 ) + filter;

	SET_4_20(shadow[reg], 0,biquad->coeff.b0);
	SET_4_20(shadow[reg], 3,biquad->coeff.b1);
	SET_4_20(shadow[reg], 6,biquad->coeff.b2);
	SET_4_20(shadow[reg], 9,biquad->coeff.a1);
	SET_4_20(shadow[reg],12,biquad->coeff.a2);

	return 0;
}

static int
tas3001c_write_biquad(	struct tas3001c_data_t *self,
			u_int channel,
			u_int filter,
			const union tas_biquad_t *biquad)
{
	int rc;

	rc=tas3001c_write_biquad_shadow(self, channel, filter, biquad);
	if (rc < 0) return rc;

	return tas3001c_sync_biquad(self, channel, filter);
}

static int
tas3001c_write_biquad_list(	struct tas3001c_data_t *self,
				u_int filter_count,
				u_int flags,
				struct tas_biquad_ctrl_t *biquads)
{
	int i;
	int rc;

	if (flags & TAS_BIQUAD_FAST_LOAD) tas3001c_fast_load(self,1);

	for (i=0; i<filter_count; i++) {
		rc=tas3001c_write_biquad(self,
					 biquads[i].channel,
					 biquads[i].filter,
					 &biquads[i].data);
		if (rc < 0) break;
	}

	if (flags & TAS_BIQUAD_FAST_LOAD) {
		tas3001c_fast_load(self,0);

		(void)tas3001c_sync_register(self,TAS3001C_REG_BASS);
		(void)tas3001c_sync_register(self,TAS3001C_REG_TREBLE);
		(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER1);
		(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER2);
		(void)tas3001c_sync_register(self,TAS3001C_REG_VOLUME);
	}

	return rc;
}

static int
tas3001c_read_biquad(	struct tas3001c_data_t *self,
			u_int channel,
			u_int filter,
			union tas_biquad_t *biquad)
{
	tas_shadow_t *shadow=self->super.shadow;
	enum tas3001c_reg_t reg;

	if (channel >= TAS3001C_BIQUAD_CHANNEL_COUNT ||
	    filter  >= TAS3001C_BIQUAD_FILTER_COUNT) return -EINVAL;

	reg=( channel ? TAS3001C_REG_RIGHT_BIQUAD0 : TAS3001C_REG_LEFT_BIQUAD0 ) + filter;

	biquad->coeff.b0=GET_4_20(shadow[reg], 0);
	biquad->coeff.b1=GET_4_20(shadow[reg], 3);
	biquad->coeff.b2=GET_4_20(shadow[reg], 6);
	biquad->coeff.a1=GET_4_20(shadow[reg], 9);
	biquad->coeff.a2=GET_4_20(shadow[reg],12);
	
	return 0;	
}

static int
tas3001c_eq_rw(	struct tas3001c_data_t *self,
		u_int cmd,
		u_long arg)
{
	int rc;
	struct tas_biquad_ctrl_t biquad;
	void __user *argp = (void __user *)arg;

	if (copy_from_user(&biquad, argp, sizeof(struct tas_biquad_ctrl_t))) {
		return -EFAULT;
	}

	if (cmd & SIOC_IN) {
		rc=tas3001c_write_biquad(self, biquad.channel, biquad.filter, &biquad.data);
		if (rc != 0) return rc;
	}

	if (cmd & SIOC_OUT) {
		rc=tas3001c_read_biquad(self, biquad.channel, biquad.filter, &biquad.data);
		if (rc != 0) return rc;

		if (copy_to_user(argp, &biquad, sizeof(struct tas_biquad_ctrl_t))) {
			return -EFAULT;
		}

	}
	return 0;
}

static int
tas3001c_eq_list_rw(	struct tas3001c_data_t *self,
			u_int cmd,
			u_long arg)
{
	int rc;
	int filter_count;
	int flags;
	int i,j;
	char sync_required[2][6];
	struct tas_biquad_ctrl_t biquad;
	struct tas_biquad_ctrl_list_t __user *argp = (void __user *)arg;

	memset(sync_required,0,sizeof(sync_required));

	if (copy_from_user(&filter_count, &argp->filter_count, sizeof(int)))
		return -EFAULT;

	if (copy_from_user(&flags, &argp->flags, sizeof(int)))
		return -EFAULT;

	if (cmd & SIOC_IN) {
	}

	for (i=0; i < filter_count; i++) {
		if (copy_from_user(&biquad, &argp->biquads[i],
				   sizeof(struct tas_biquad_ctrl_t))) {
			return -EFAULT;
		}

		if (cmd & SIOC_IN) {
			sync_required[biquad.channel][biquad.filter]=1;
			rc=tas3001c_write_biquad_shadow(self, biquad.channel, biquad.filter, &biquad.data);
			if (rc != 0) return rc;
		}

		if (cmd & SIOC_OUT) {
			rc=tas3001c_read_biquad(self, biquad.channel, biquad.filter, &biquad.data);
			if (rc != 0) return rc;

			if (copy_to_user(&argp->biquads[i], &biquad,
					 sizeof(struct tas_biquad_ctrl_t))) {
				return -EFAULT;
			}
		}
	}

	if (cmd & SIOC_IN) {
		if (flags & TAS_BIQUAD_FAST_LOAD) tas3001c_fast_load(self,1);
		for (i=0; i<2; i++) {
			for (j=0; j<6; j++) {
				if (sync_required[i][j]) {
					rc=tas3001c_sync_biquad(self, i, j);
					if (rc < 0) return rc;
				}
			}
		}
		if (flags & TAS_BIQUAD_FAST_LOAD) {
			tas3001c_fast_load(self,0);
			/* now we need to set up the mixers again,
			   because leaving fast mode resets them. */
			(void)tas3001c_sync_register(self,TAS3001C_REG_BASS);
			(void)tas3001c_sync_register(self,TAS3001C_REG_TREBLE);
			(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER1);
			(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER2);
			(void)tas3001c_sync_register(self,TAS3001C_REG_VOLUME);
		}
	}

	return 0;
}

static int
tas3001c_update_drce(	struct tas3001c_data_t *self,
			int flags,
			struct tas_drce_t *drce)
{
	tas_shadow_t *shadow;
	shadow=self->super.shadow;

	shadow[TAS3001C_REG_DRC][1] = 0xc1;

	if (flags & TAS_DRCE_THRESHOLD) {
		self->drce_state.threshold=quantize_db(drce->threshold);
		shadow[TAS3001C_REG_DRC][2] = db_to_regval(self->drce_state.threshold);
	}

	if (flags & TAS_DRCE_ENABLE) {
		self->drce_state.enable = drce->enable;
	}

	if (!self->drce_state.enable) {
		shadow[TAS3001C_REG_DRC][0] = 0xf0;
	}

#ifdef DEBUG_DRCE
	printk("DRCE IOCTL: set [ ENABLE:%x THRESH:%x\n",
	       self->drce_state.enable,
	       self->drce_state.threshold);

	printk("DRCE IOCTL: reg [ %02x %02x ]\n",
	       (unsigned char)shadow[TAS3001C_REG_DRC][0],
	       (unsigned char)shadow[TAS3001C_REG_DRC][1]);
#endif

	return tas3001c_sync_register(self, TAS3001C_REG_DRC);
}

static int
tas3001c_drce_rw(	struct tas3001c_data_t *self,
			u_int cmd,
			u_long arg)
{
	int rc;
	struct tas_drce_ctrl_t drce_ctrl;
	void __user *argp = (void __user *)arg;

	if (copy_from_user(&drce_ctrl, argp, sizeof(struct tas_drce_ctrl_t)))
		return -EFAULT;

#ifdef DEBUG_DRCE
	printk("DRCE IOCTL: input [ FLAGS:%x ENABLE:%x THRESH:%x\n",
	       drce_ctrl.flags,
	       drce_ctrl.data.enable,
	       drce_ctrl.data.threshold);
#endif

	if (cmd & SIOC_IN) {
		rc = tas3001c_update_drce(self, drce_ctrl.flags, &drce_ctrl.data);
		if (rc < 0)
			return rc;
	}

	if (cmd & SIOC_OUT) {
		if (drce_ctrl.flags & TAS_DRCE_ENABLE)
			drce_ctrl.data.enable = self->drce_state.enable;

		if (drce_ctrl.flags & TAS_DRCE_THRESHOLD)
			drce_ctrl.data.threshold = self->drce_state.threshold;

		if (copy_to_user(argp, &drce_ctrl,
				 sizeof(struct tas_drce_ctrl_t))) {
			return -EFAULT;
		}
	}

	return 0;
}

static void
tas3001c_update_device_parameters(struct tas3001c_data_t *self)
{
	int i,j;

	if (!self) return;

	if (self->output_id == TAS_OUTPUT_HEADPHONES) {
		tas3001c_fast_load(self, 1);

		for (i=0; i<TAS3001C_BIQUAD_CHANNEL_COUNT; i++) {
			for (j=0; j<TAS3001C_BIQUAD_FILTER_COUNT; j++) {
				tas3001c_write_biquad(self, i, j, &tas3001c_eq_unity);
			}
		}

		tas3001c_fast_load(self, 0);

		(void)tas3001c_sync_register(self,TAS3001C_REG_BASS);
		(void)tas3001c_sync_register(self,TAS3001C_REG_TREBLE);
		(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER1);
		(void)tas3001c_sync_register(self,TAS3001C_REG_MIXER2);
		(void)tas3001c_sync_register(self,TAS3001C_REG_VOLUME);

		return;
	}

	for (i=0; tas3001c_eq_prefs[i]; i++) {
		struct tas_eq_pref_t *eq = tas3001c_eq_prefs[i];

		if (eq->device_id == self->device_id &&
		    (eq->output_id == 0 || eq->output_id == self->output_id) &&
		    (eq->speaker_id == 0 || eq->speaker_id == self->speaker_id)) {

			tas3001c_update_drce(self, TAS_DRCE_ALL, eq->drce);
			tas3001c_write_biquad_list(self, eq->filter_count, TAS_BIQUAD_FAST_LOAD, eq->biquads);

			break;
		}
	}
}

static void
tas3001c_device_change_handler(struct work_struct *work)
{
	struct tas3001c_data_t *self;
	self = container_of(work, struct tas3001c_data_t, change);
	tas3001c_update_device_parameters(self);
}

static int
tas3001c_output_device_change(	struct tas3001c_data_t *self,
				int device_id,
				int output_id,
				int speaker_id)
{
	self->device_id=device_id;
	self->output_id=output_id;
	self->speaker_id=speaker_id;

	schedule_work(&self->change);
	return 0;
}

static int
tas3001c_device_ioctl(	struct tas3001c_data_t *self,
			u_int cmd,
			u_long arg)
{
	uint __user *argp = (void __user *)arg;
	switch (cmd) {
	case TAS_READ_EQ:
	case TAS_WRITE_EQ:
		return tas3001c_eq_rw(self, cmd, arg);

	case TAS_READ_EQ_LIST:
	case TAS_WRITE_EQ_LIST:
		return tas3001c_eq_list_rw(self, cmd, arg);

	case TAS_READ_EQ_FILTER_COUNT:
		put_user(TAS3001C_BIQUAD_FILTER_COUNT, argp);
		return 0;

	case TAS_READ_EQ_CHANNEL_COUNT:
		put_user(TAS3001C_BIQUAD_CHANNEL_COUNT, argp);
		return 0;

	case TAS_READ_DRCE:
	case TAS_WRITE_DRCE:
		return tas3001c_drce_rw(self, cmd, arg);

	case TAS_READ_DRCE_CAPS:
		put_user(TAS_DRCE_ENABLE | TAS_DRCE_THRESHOLD, argp);
		return 0;

	case TAS_READ_DRCE_MIN:
	case TAS_READ_DRCE_MAX: {
		struct tas_drce_ctrl_t drce_ctrl;

		if (copy_from_user(&drce_ctrl, argp,
				   sizeof(struct tas_drce_ctrl_t))) {
			return -EFAULT;
		}

		if (drce_ctrl.flags & TAS_DRCE_THRESHOLD) {
			if (cmd == TAS_READ_DRCE_MIN) {
				drce_ctrl.data.threshold=-36<<8;
			} else {
				drce_ctrl.data.threshold=-6<<8;
			}
		}

		if (copy_to_user(argp, &drce_ctrl,
				 sizeof(struct tas_drce_ctrl_t))) {
			return -EFAULT;
		}
	}
	}

	return -EINVAL;
}

static int
tas3001c_init_mixer(struct tas3001c_data_t *self)
{
	unsigned char mcr = (1<<6)+(2<<4)+(2<<2);

	/* Make sure something answers on the i2c bus */
	if (tas3001c_write_register(self, TAS3001C_REG_MCR, &mcr,
	    WRITE_NORMAL|FORCE_WRITE) < 0)
		return -1;

	tas3001c_fast_load(self, 1);

	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD0);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD1);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD2);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD3);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD4);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD5);
	(void)tas3001c_sync_register(self,TAS3001C_REG_RIGHT_BIQUAD6);

	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD0);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD1);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD2);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD3);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD4);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD5);
	(void)tas3001c_sync_register(self,TAS3001C_REG_LEFT_BIQUAD6);

	tas3001c_fast_load(self, 0);

	tas3001c_set_mixer_level(self, SOUND_MIXER_VOLUME, VOL_DEFAULT<<8 | VOL_DEFAULT);
	tas3001c_set_mixer_level(self, SOUND_MIXER_PCM, INPUT_DEFAULT<<8 | INPUT_DEFAULT);
	tas3001c_set_mixer_level(self, SOUND_MIXER_ALTPCM, 0);

	tas3001c_set_mixer_level(self, SOUND_MIXER_BASS, BASS_DEFAULT);
	tas3001c_set_mixer_level(self, SOUND_MIXER_TREBLE, TREBLE_DEFAULT);

	return 0;
}

static int
tas3001c_uninit_mixer(struct tas3001c_data_t *self)
{
	tas3001c_set_mixer_level(self, SOUND_MIXER_VOLUME, 0);
	tas3001c_set_mixer_level(self, SOUND_MIXER_PCM,    0);
	tas3001c_set_mixer_level(self, SOUND_MIXER_ALTPCM, 0);

	tas3001c_set_mixer_level(self, SOUND_MIXER_BASS,   0);
	tas3001c_set_mixer_level(self, SOUND_MIXER_TREBLE, 0);

	return 0;
}

static int
tas3001c_init(struct i2c_client *client)
{
	struct tas3001c_data_t *self;
	size_t sz = sizeof(*self) + (TAS3001C_REG_MAX*sizeof(tas_shadow_t));
	int i, j;

	self = kmalloc(sz, GFP_KERNEL);
	if (!self)
		return -ENOMEM;
	memset(self, 0, sz);

	self->super.client = client;
	self->super.shadow = (tas_shadow_t *)(self+1);
	self->output_id = TAS_OUTPUT_HEADPHONES;

	dev_set_drvdata(&client->dev, self);

	for (i = 0; i < TAS3001C_BIQUAD_CHANNEL_COUNT; i++)
		for (j = 0; j < TAS3001C_BIQUAD_FILTER_COUNT; j++)
			tas3001c_write_biquad_shadow(self, i, j,
				&tas3001c_eq_unity);

	INIT_WORK(&self->change, tas3001c_device_change_handler);
	return 0;
}

static void
tas3001c_uninit(struct tas3001c_data_t *self)
{
	tas3001c_uninit_mixer(self);
	kfree(self);
}

struct tas_driver_hooks_t tas3001c_hooks = {
	.init			= (tas_hook_init_t)tas3001c_init,
	.post_init		= (tas_hook_post_init_t)tas3001c_init_mixer,
	.uninit			= (tas_hook_uninit_t)tas3001c_uninit,
	.get_mixer_level	= (tas_hook_get_mixer_level_t)tas3001c_get_mixer_level,
	.set_mixer_level	= (tas_hook_set_mixer_level_t)tas3001c_set_mixer_level,
	.enter_sleep		= (tas_hook_enter_sleep_t)tas3001c_enter_sleep,
	.leave_sleep		= (tas_hook_leave_sleep_t)tas3001c_leave_sleep,
	.supported_mixers	= (tas_hook_supported_mixers_t)tas3001c_supported_mixers,
	.mixer_is_stereo	= (tas_hook_mixer_is_stereo_t)tas3001c_mixer_is_stereo,
	.stereo_mixers		= (tas_hook_stereo_mixers_t)tas3001c_stereo_mixers,
	.output_device_change	= (tas_hook_output_device_change_t)tas3001c_output_device_change,
	.device_ioctl		= (tas_hook_device_ioctl_t)tas3001c_device_ioctl
};