xref: /linux/sound/i2c/other/ak4114.c (revision f3d9478b2ce468c3115b02ecae7e975990697f15)
1 /*
2  *  Routines for control of the AK4114 via I2C and 4-wire serial interface
3  *  IEC958 (S/PDIF) receiver by Asahi Kasei
4  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
5  *
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */
22 
23 #include <sound/driver.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <sound/core.h>
27 #include <sound/control.h>
28 #include <sound/pcm.h>
29 #include <sound/ak4114.h>
30 #include <sound/asoundef.h>
31 
32 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
33 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
34 MODULE_LICENSE("GPL");
35 
36 #define AK4114_ADDR			0x00 /* fixed address */
37 
38 static void ak4114_stats(void *);
39 
40 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
41 {
42 	ak4114->write(ak4114->private_data, reg, val);
43 	if (reg <= AK4114_REG_INT1_MASK)
44 		ak4114->regmap[reg] = val;
45 	else if (reg >= AK4114_REG_RXCSB0 && reg <= AK4114_REG_TXCSB4)
46 		ak4114->txcsb[reg-AK4114_REG_RXCSB0] = val;
47 }
48 
49 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
50 {
51 	return ak4114->read(ak4114->private_data, reg);
52 }
53 
54 #if 0
55 static void reg_dump(struct ak4114 *ak4114)
56 {
57 	int i;
58 
59 	printk(KERN_DEBUG "AK4114 REG DUMP:\n");
60 	for (i = 0; i < 0x20; i++)
61 		printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
62 }
63 #endif
64 
65 static void snd_ak4114_free(struct ak4114 *chip)
66 {
67 	chip->init = 1;	/* don't schedule new work */
68 	mb();
69 	if (chip->workqueue != NULL) {
70 		flush_workqueue(chip->workqueue);
71 		destroy_workqueue(chip->workqueue);
72 	}
73 	kfree(chip);
74 }
75 
76 static int snd_ak4114_dev_free(struct snd_device *device)
77 {
78 	struct ak4114 *chip = device->device_data;
79 	snd_ak4114_free(chip);
80 	return 0;
81 }
82 
83 int snd_ak4114_create(struct snd_card *card,
84 		      ak4114_read_t *read, ak4114_write_t *write,
85 		      unsigned char pgm[7], unsigned char txcsb[5],
86 		      void *private_data, struct ak4114 **r_ak4114)
87 {
88 	struct ak4114 *chip;
89 	int err = 0;
90 	unsigned char reg;
91 	static struct snd_device_ops ops = {
92 		.dev_free =     snd_ak4114_dev_free,
93 	};
94 
95 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
96 	if (chip == NULL)
97 		return -ENOMEM;
98 	spin_lock_init(&chip->lock);
99 	chip->card = card;
100 	chip->read = read;
101 	chip->write = write;
102 	chip->private_data = private_data;
103 
104 	for (reg = 0; reg < 7; reg++)
105 		chip->regmap[reg] = pgm[reg];
106 	for (reg = 0; reg < 5; reg++)
107 		chip->txcsb[reg] = txcsb[reg];
108 
109 	chip->workqueue = create_workqueue("snd-ak4114");
110 	if (chip->workqueue == NULL) {
111 		kfree(chip);
112 		return -ENOMEM;
113 	}
114 
115 	snd_ak4114_reinit(chip);
116 
117 	chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
118 	chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
119 
120 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
121 		goto __fail;
122 
123 	if (r_ak4114)
124 		*r_ak4114 = chip;
125 	return 0;
126 
127       __fail:
128 	snd_ak4114_free(chip);
129 	return err < 0 ? err : -EIO;
130 }
131 
132 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
133 {
134 	if (reg <= AK4114_REG_INT1_MASK)
135 		reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
136 	else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
137 		reg_write(chip, reg, (chip->txcsb[reg] & ~mask) | val);
138 }
139 
140 void snd_ak4114_reinit(struct ak4114 *chip)
141 {
142 	unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
143 
144 	chip->init = 1;
145 	mb();
146 	flush_workqueue(chip->workqueue);
147 	/* bring the chip to reset state and powerdown state */
148 	reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
149 	udelay(200);
150 	/* release reset, but leave powerdown */
151 	reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
152 	udelay(200);
153 	for (reg = 1; reg < 7; reg++)
154 		reg_write(chip, reg, chip->regmap[reg]);
155 	for (reg = 0; reg < 5; reg++)
156 		reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
157 	/* release powerdown, everything is initialized now */
158 	reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
159 	/* bring up statistics / event queing */
160 	chip->init = 0;
161 	INIT_WORK(&chip->work, ak4114_stats, chip);
162 	queue_delayed_work(chip->workqueue, &chip->work, HZ / 10);
163 }
164 
165 static unsigned int external_rate(unsigned char rcs1)
166 {
167 	switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
168 	case AK4114_FS_32000HZ: return 32000;
169 	case AK4114_FS_44100HZ: return 44100;
170 	case AK4114_FS_48000HZ: return 48000;
171 	case AK4114_FS_88200HZ: return 88200;
172 	case AK4114_FS_96000HZ: return 96000;
173 	case AK4114_FS_176400HZ: return 176400;
174 	case AK4114_FS_192000HZ: return 192000;
175 	default:		return 0;
176 	}
177 }
178 
179 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
180 				    struct snd_ctl_elem_info *uinfo)
181 {
182 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
183 	uinfo->count = 1;
184 	uinfo->value.integer.min = 0;
185 	uinfo->value.integer.max = LONG_MAX;
186 	return 0;
187 }
188 
189 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
190 				   struct snd_ctl_elem_value *ucontrol)
191 {
192 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
193 	long *ptr;
194 
195 	spin_lock_irq(&chip->lock);
196 	ptr = (long *)(((char *)chip) + kcontrol->private_value);
197 	ucontrol->value.integer.value[0] = *ptr;
198 	*ptr = 0;
199 	spin_unlock_irq(&chip->lock);
200 	return 0;
201 }
202 
203 static int snd_ak4114_in_bit_info(struct snd_kcontrol *kcontrol,
204 				  struct snd_ctl_elem_info *uinfo)
205 {
206 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
207 	uinfo->count = 1;
208 	uinfo->value.integer.min = 0;
209 	uinfo->value.integer.max = 1;
210 	return 0;
211 }
212 
213 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
214 				 struct snd_ctl_elem_value *ucontrol)
215 {
216 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
217 	unsigned char reg = kcontrol->private_value & 0xff;
218 	unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
219 	unsigned char inv = (kcontrol->private_value >> 31) & 1;
220 
221 	ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
222 	return 0;
223 }
224 
225 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
226 				struct snd_ctl_elem_info *uinfo)
227 {
228 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
229 	uinfo->count = 1;
230 	uinfo->value.integer.min = 0;
231 	uinfo->value.integer.max = 192000;
232 	return 0;
233 }
234 
235 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
236 			       struct snd_ctl_elem_value *ucontrol)
237 {
238 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
239 
240 	ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
241 	return 0;
242 }
243 
244 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
245 {
246 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
247 	uinfo->count = 1;
248 	return 0;
249 }
250 
251 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
252 				struct snd_ctl_elem_value *ucontrol)
253 {
254 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
255 	unsigned i;
256 
257 	for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
258 		ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
259 	return 0;
260 }
261 
262 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
263 					 struct snd_ctl_elem_value *ucontrol)
264 {
265 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
266 	unsigned i;
267 
268 	for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
269 		ucontrol->value.iec958.status[i] = chip->txcsb[i];
270 	return 0;
271 }
272 
273 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
274 					 struct snd_ctl_elem_value *ucontrol)
275 {
276 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
277 	unsigned i;
278 
279 	for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
280 		reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
281 	return 0;
282 }
283 
284 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
285 {
286 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
287 	uinfo->count = 1;
288 	return 0;
289 }
290 
291 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
292 				      struct snd_ctl_elem_value *ucontrol)
293 {
294 	memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
295 	return 0;
296 }
297 
298 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
299 {
300 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
301 	uinfo->value.integer.min = 0;
302 	uinfo->value.integer.max = 0xffff;
303 	uinfo->count = 4;
304 	return 0;
305 }
306 
307 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
308 				 struct snd_ctl_elem_value *ucontrol)
309 {
310 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
311 	unsigned short tmp;
312 
313 	ucontrol->value.integer.value[0] = 0xf8f2;
314 	ucontrol->value.integer.value[1] = 0x4e1f;
315 	tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
316 	ucontrol->value.integer.value[2] = tmp;
317 	tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
318 	ucontrol->value.integer.value[3] = tmp;
319 	return 0;
320 }
321 
322 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
323 {
324 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
325 	uinfo->count = AK4114_REG_QSUB_SIZE;
326 	return 0;
327 }
328 
329 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
330 				 struct snd_ctl_elem_value *ucontrol)
331 {
332 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
333 	unsigned i;
334 
335 	for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
336 		ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
337 	return 0;
338 }
339 
340 /* Don't forget to change AK4114_CONTROLS define!!! */
341 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
342 {
343 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
344 	.name =		"IEC958 Parity Errors",
345 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
346 	.info =		snd_ak4114_in_error_info,
347 	.get =		snd_ak4114_in_error_get,
348 	.private_value = offsetof(struct ak4114, parity_errors),
349 },
350 {
351 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
352 	.name =		"IEC958 V-Bit Errors",
353 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
354 	.info =		snd_ak4114_in_error_info,
355 	.get =		snd_ak4114_in_error_get,
356 	.private_value = offsetof(struct ak4114, v_bit_errors),
357 },
358 {
359 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
360 	.name =		"IEC958 C-CRC Errors",
361 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
362 	.info =		snd_ak4114_in_error_info,
363 	.get =		snd_ak4114_in_error_get,
364 	.private_value = offsetof(struct ak4114, ccrc_errors),
365 },
366 {
367 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
368 	.name =		"IEC958 Q-CRC Errors",
369 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
370 	.info =		snd_ak4114_in_error_info,
371 	.get =		snd_ak4114_in_error_get,
372 	.private_value = offsetof(struct ak4114, qcrc_errors),
373 },
374 {
375 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
376 	.name =		"IEC958 External Rate",
377 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
378 	.info =		snd_ak4114_rate_info,
379 	.get =		snd_ak4114_rate_get,
380 },
381 {
382 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
383 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
384 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
385 	.info =		snd_ak4114_spdif_mask_info,
386 	.get =		snd_ak4114_spdif_mask_get,
387 },
388 {
389 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
390 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
391 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
392 	.info =		snd_ak4114_spdif_info,
393 	.get =		snd_ak4114_spdif_playback_get,
394 	.put =		snd_ak4114_spdif_playback_put,
395 },
396 {
397 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
398 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
399 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
400 	.info =		snd_ak4114_spdif_mask_info,
401 	.get =		snd_ak4114_spdif_mask_get,
402 },
403 {
404 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
405 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
406 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
407 	.info =		snd_ak4114_spdif_info,
408 	.get =		snd_ak4114_spdif_get,
409 },
410 {
411 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
412 	.name =		"IEC958 Preample Capture Default",
413 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
414 	.info =		snd_ak4114_spdif_pinfo,
415 	.get =		snd_ak4114_spdif_pget,
416 },
417 {
418 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
419 	.name =		"IEC958 Q-subcode Capture Default",
420 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
421 	.info =		snd_ak4114_spdif_qinfo,
422 	.get =		snd_ak4114_spdif_qget,
423 },
424 {
425 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
426 	.name =		"IEC958 Audio",
427 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
428 	.info =		snd_ak4114_in_bit_info,
429 	.get =		snd_ak4114_in_bit_get,
430 	.private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
431 },
432 {
433 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
434 	.name =		"IEC958 Non-PCM Bitstream",
435 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
436 	.info =		snd_ak4114_in_bit_info,
437 	.get =		snd_ak4114_in_bit_get,
438 	.private_value = (6<<8) | AK4114_REG_RCS1,
439 },
440 {
441 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
442 	.name =		"IEC958 DTS Bitstream",
443 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
444 	.info =		snd_ak4114_in_bit_info,
445 	.get =		snd_ak4114_in_bit_get,
446 	.private_value = (3<<8) | AK4114_REG_RCS1,
447 }
448 };
449 
450 int snd_ak4114_build(struct ak4114 *ak4114,
451 		     struct snd_pcm_substream *ply_substream,
452 		     struct snd_pcm_substream *cap_substream)
453 {
454 	struct snd_kcontrol *kctl;
455 	unsigned int idx;
456 	int err;
457 
458 	snd_assert(cap_substream, return -EINVAL);
459 	ak4114->playback_substream = ply_substream;
460 	ak4114->capture_substream = cap_substream;
461 	for (idx = 0; idx < AK4114_CONTROLS; idx++) {
462 		kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
463 		if (kctl == NULL)
464 			return -ENOMEM;
465 		if (!strstr(kctl->id.name, "Playback")) {
466 			if (ply_substream == NULL) {
467 				snd_ctl_free_one(kctl);
468 				ak4114->kctls[idx] = NULL;
469 				continue;
470 			}
471 			kctl->id.device = ply_substream->pcm->device;
472 			kctl->id.subdevice = ply_substream->number;
473 		} else {
474 			kctl->id.device = cap_substream->pcm->device;
475 			kctl->id.subdevice = cap_substream->number;
476 		}
477 		err = snd_ctl_add(ak4114->card, kctl);
478 		if (err < 0)
479 			return err;
480 		ak4114->kctls[idx] = kctl;
481 	}
482 	return 0;
483 }
484 
485 int snd_ak4114_external_rate(struct ak4114 *ak4114)
486 {
487 	unsigned char rcs1;
488 
489 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
490 	return external_rate(rcs1);
491 }
492 
493 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
494 {
495 	struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
496 	unsigned long _flags;
497 	int res = 0;
498 	unsigned char rcs0, rcs1;
499 	unsigned char c0, c1;
500 
501 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
502 	if (flags & AK4114_CHECK_NO_STAT)
503 		goto __rate;
504 	rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
505 	spin_lock_irqsave(&ak4114->lock, _flags);
506 	if (rcs0 & AK4114_PAR)
507 		ak4114->parity_errors++;
508 	if (rcs1 & AK4114_V)
509 		ak4114->v_bit_errors++;
510 	if (rcs1 & AK4114_CCRC)
511 		ak4114->ccrc_errors++;
512 	if (rcs1 & AK4114_QCRC)
513 		ak4114->qcrc_errors++;
514 	c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
515                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
516 	c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
517 	ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
518 	ak4114->rcs1 = rcs1;
519 	spin_unlock_irqrestore(&ak4114->lock, _flags);
520 
521 	if (rcs0 & AK4114_PAR)
522 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[0]->id);
523 	if (rcs0 & AK4114_V)
524 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[1]->id);
525 	if (rcs1 & AK4114_CCRC)
526 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[2]->id);
527 	if (rcs1 & AK4114_QCRC)
528 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[3]->id);
529 
530 	/* rate change */
531 	if (c1 & 0xf0)
532 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[4]->id);
533 
534 	if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
535 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[9]->id);
536 	if (c0 & AK4114_QINT)
537 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[10]->id);
538 
539 	if (c0 & AK4114_AUDION)
540 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[11]->id);
541 	if (c0 & AK4114_AUTO)
542 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[12]->id);
543 	if (c0 & AK4114_DTSCD)
544 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[13]->id);
545 
546 	if (ak4114->change_callback && (c0 | c1) != 0)
547 		ak4114->change_callback(ak4114, c0, c1);
548 
549       __rate:
550 	/* compare rate */
551 	res = external_rate(rcs1);
552 	if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
553 		snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
554 		if (snd_pcm_running(ak4114->capture_substream)) {
555 			// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
556 			snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
557 			res = 1;
558 		}
559 		snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
560 	}
561 	return res;
562 }
563 
564 static void ak4114_stats(void *data)
565 {
566 	struct ak4114 *chip = (struct ak4114 *)data;
567 
568 	if (chip->init)
569 		return;
570 	snd_ak4114_check_rate_and_errors(chip, 0);
571 	queue_delayed_work(chip->workqueue, &chip->work, HZ / 10);
572 }
573 
574 EXPORT_SYMBOL(snd_ak4114_create);
575 EXPORT_SYMBOL(snd_ak4114_reg_write);
576 EXPORT_SYMBOL(snd_ak4114_reinit);
577 EXPORT_SYMBOL(snd_ak4114_build);
578 EXPORT_SYMBOL(snd_ak4114_external_rate);
579 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
580