summaryrefslogtreecommitdiffstats
path: root/sound/i2c/other/ak4117.c
blob: b923342cadf4e4bb451fc514fa389cf578d3f0f1 (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
/*
 *  Routines for control of the AK4117 via 4-wire serial interface
 *  IEC958 (S/PDIF) receiver by Asahi Kasei
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   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
 *
 */

#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/ak4117.h>
#include <sound/asoundef.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei");
MODULE_LICENSE("GPL");

#define AK4117_ADDR			0x00 /* fixed address */

static void snd_ak4117_timer(struct timer_list *t);

static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val)
{
	ak4117->write(ak4117->private_data, reg, val);
	if (reg < sizeof(ak4117->regmap))
		ak4117->regmap[reg] = val;
}

static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg)
{
	return ak4117->read(ak4117->private_data, reg);
}

#if 0
static void reg_dump(struct ak4117 *ak4117)
{
	int i;

	printk(KERN_DEBUG "AK4117 REG DUMP:\n");
	for (i = 0; i < 0x1b; i++)
		printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0);
}
#endif

static void snd_ak4117_free(struct ak4117 *chip)
{
	del_timer_sync(&chip->timer);
	kfree(chip);
}

static int snd_ak4117_dev_free(struct snd_device *device)
{
	struct ak4117 *chip = device->device_data;
	snd_ak4117_free(chip);
	return 0;
}

int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write,
		      const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117)
{
	struct ak4117 *chip;
	int err = 0;
	unsigned char reg;
	static struct snd_device_ops ops = {
		.dev_free =     snd_ak4117_dev_free,
	};

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;
	spin_lock_init(&chip->lock);
	chip->card = card;
	chip->read = read;
	chip->write = write;
	chip->private_data = private_data;
	timer_setup(&chip->timer, snd_ak4117_timer, 0);

	for (reg = 0; reg < 5; reg++)
		chip->regmap[reg] = pgm[reg];
	snd_ak4117_reinit(chip);

	chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
	chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
	chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);

	if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
		goto __fail;

	if (r_ak4117)
		*r_ak4117 = chip;
	return 0;

      __fail:
	snd_ak4117_free(chip);
	return err;
}

void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
{
	if (reg >= 5)
		return;
	reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
}

void snd_ak4117_reinit(struct ak4117 *chip)
{
	unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;

	del_timer(&chip->timer);
	chip->init = 1;
	/* bring the chip to reset state and powerdown state */
	reg_write(chip, AK4117_REG_PWRDN, 0);
	udelay(200);
	/* release reset, but leave powerdown */
	reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
	udelay(200);
	for (reg = 1; reg < 5; reg++)
		reg_write(chip, reg, chip->regmap[reg]);
	/* release powerdown, everything is initialized now */
	reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
	chip->init = 0;
	mod_timer(&chip->timer, 1 + jiffies);
}

static unsigned int external_rate(unsigned char rcs1)
{
	switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
	case AK4117_FS_32000HZ: return 32000;
	case AK4117_FS_44100HZ: return 44100;
	case AK4117_FS_48000HZ: return 48000;
	case AK4117_FS_88200HZ: return 88200;
	case AK4117_FS_96000HZ: return 96000;
	case AK4117_FS_176400HZ: return 176400;
	case AK4117_FS_192000HZ: return 192000;
	default:		return 0;
	}
}

static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = LONG_MAX;
	return 0;
}

static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);

	spin_lock_irq(&chip->lock);
	ucontrol->value.integer.value[0] =
		       chip->errors[kcontrol->private_value];
	chip->errors[kcontrol->private_value] = 0;
	spin_unlock_irq(&chip->lock);
	return 0;
}

#define snd_ak4117_in_bit_info		snd_ctl_boolean_mono_info

static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
	unsigned char reg = kcontrol->private_value & 0xff;
	unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
	unsigned char inv = (kcontrol->private_value >> 31) & 1;

	ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
	return 0;
}

static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);

	ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
	return 0;
}

static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
	int change;
	u8 old_val;
	
	spin_lock_irq(&chip->lock);
	old_val = chip->regmap[AK4117_REG_IO];
	change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
	if (change)
		reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
	spin_unlock_irq(&chip->lock);
	return change;
}

static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 192000;
	return 0;
}

static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);

	ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
	return 0;
}

static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}

static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
	unsigned i;

	for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
		ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
	return 0;
}

static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}

static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
	return 0;
}

static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 0xffff;
	uinfo->count = 4;
	return 0;
}

static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
	unsigned short tmp;

	ucontrol->value.integer.value[0] = 0xf8f2;
	ucontrol->value.integer.value[1] = 0x4e1f;
	tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
	ucontrol->value.integer.value[2] = tmp;
	tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
	ucontrol->value.integer.value[3] = tmp;
	return 0;
}

static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
	uinfo->count = AK4117_REG_QSUB_SIZE;
	return 0;
}

static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
	unsigned i;

	for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
		ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
	return 0;
}

/* Don't forget to change AK4117_CONTROLS define!!! */
static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Parity Errors",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_error_info,
	.get =		snd_ak4117_in_error_get,
	.private_value = AK4117_PARITY_ERRORS,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 V-Bit Errors",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_error_info,
	.get =		snd_ak4117_in_error_get,
	.private_value = AK4117_V_BIT_ERRORS,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 C-CRC Errors",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_error_info,
	.get =		snd_ak4117_in_error_get,
	.private_value = AK4117_CCRC_ERRORS,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Q-CRC Errors",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_error_info,
	.get =		snd_ak4117_in_error_get,
	.private_value = AK4117_QCRC_ERRORS,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 External Rate",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_rate_info,
	.get =		snd_ak4117_rate_get,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
	.info =		snd_ak4117_spdif_mask_info,
	.get =		snd_ak4117_spdif_mask_get,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_spdif_info,
	.get =		snd_ak4117_spdif_get,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Preamble Capture Default",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_spdif_pinfo,
	.get =		snd_ak4117_spdif_pget,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Q-subcode Capture Default",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_spdif_qinfo,
	.get =		snd_ak4117_spdif_qget,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Audio",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_bit_info,
	.get =		snd_ak4117_in_bit_get,
	.private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 Non-PCM Bitstream",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_bit_info,
	.get =		snd_ak4117_in_bit_get,
	.private_value = (5<<8) | AK4117_REG_RCS1,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"IEC958 DTS Bitstream",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.info =		snd_ak4117_in_bit_info,
	.get =		snd_ak4117_in_bit_get,
	.private_value = (6<<8) | AK4117_REG_RCS1,
},
{
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		"AK4117 Input Select",
	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
	.info =		snd_ak4117_rx_info,
	.get =		snd_ak4117_rx_get,
	.put =		snd_ak4117_rx_put,
}
};

int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
{
	struct snd_kcontrol *kctl;
	unsigned int idx;
	int err;

	if (snd_BUG_ON(!cap_substream))
		return -EINVAL;
	ak4117->substream = cap_substream;
	for (idx = 0; idx < AK4117_CONTROLS; idx++) {
		kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
		if (kctl == NULL)
			return -ENOMEM;
		kctl->id.device = cap_substream->pcm->device;
		kctl->id.subdevice = cap_substream->number;
		err = snd_ctl_add(ak4117->card, kctl);
		if (err < 0)
			return err;
		ak4117->kctls[idx] = kctl;
	}
	return 0;
}

int snd_ak4117_external_rate(struct ak4117 *ak4117)
{
	unsigned char rcs1;

	rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
	return external_rate(rcs1);
}

int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
{
	struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
	unsigned long _flags;
	int res = 0;
	unsigned char rcs0, rcs1, rcs2;
	unsigned char c0, c1;

	rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
	if (flags & AK4117_CHECK_NO_STAT)
		goto __rate;
	rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
	rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
	// printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
	spin_lock_irqsave(&ak4117->lock, _flags);
	if (rcs0 & AK4117_PAR)
		ak4117->errors[AK4117_PARITY_ERRORS]++;
	if (rcs0 & AK4117_V)
		ak4117->errors[AK4117_V_BIT_ERRORS]++;
	if (rcs2 & AK4117_CCRC)
		ak4117->errors[AK4117_CCRC_ERRORS]++;
	if (rcs2 & AK4117_QCRC)
		ak4117->errors[AK4117_QCRC_ERRORS]++;
	c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
                     (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
	c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
	             (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
	ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
	ak4117->rcs1 = rcs1;
	ak4117->rcs2 = rcs2;
	spin_unlock_irqrestore(&ak4117->lock, _flags);

	if (rcs0 & AK4117_PAR)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
	if (rcs0 & AK4117_V)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
	if (rcs2 & AK4117_CCRC)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
	if (rcs2 & AK4117_QCRC)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);

	/* rate change */
	if (c1 & 0x0f)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);

	if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
	if (c0 & AK4117_QINT)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);

	if (c0 & AK4117_AUDION)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
	if (c1 & AK4117_NPCM)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
	if (c1 & AK4117_DTSCD)
		snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
		
	if (ak4117->change_callback && (c0 | c1) != 0)
		ak4117->change_callback(ak4117, c0, c1);

      __rate:
	/* compare rate */
	res = external_rate(rcs1);
	if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
		snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
		if (snd_pcm_running(ak4117->substream)) {
			// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
			snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
			wake_up(&runtime->sleep);
			res = 1;
		}
		snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
	}
	return res;
}

static void snd_ak4117_timer(struct timer_list *t)
{
	struct ak4117 *chip = from_timer(chip, t, timer);

	if (chip->init)
		return;
	snd_ak4117_check_rate_and_errors(chip, 0);
	mod_timer(&chip->timer, 1 + jiffies);
}

EXPORT_SYMBOL(snd_ak4117_create);
EXPORT_SYMBOL(snd_ak4117_reg_write);
EXPORT_SYMBOL(snd_ak4117_reinit);
EXPORT_SYMBOL(snd_ak4117_build);
EXPORT_SYMBOL(snd_ak4117_external_rate);
EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);