xref: /openbmc/linux/sound/i2c/other/ak4114.c (revision 4800cd83)
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@perex.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 <linux/slab.h>
24 #include <linux/delay.h>
25 #include <sound/core.h>
26 #include <sound/control.h>
27 #include <sound/pcm.h>
28 #include <sound/ak4114.h>
29 #include <sound/asoundef.h>
30 #include <sound/info.h>
31 
32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.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(struct work_struct *work);
39 static void ak4114_init_regs(struct ak4114 *chip);
40 
41 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
42 {
43 	ak4114->write(ak4114->private_data, reg, val);
44 	if (reg <= AK4114_REG_INT1_MASK)
45 		ak4114->regmap[reg] = val;
46 	else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
47 		ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
48 }
49 
50 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
51 {
52 	return ak4114->read(ak4114->private_data, reg);
53 }
54 
55 #if 0
56 static void reg_dump(struct ak4114 *ak4114)
57 {
58 	int i;
59 
60 	printk(KERN_DEBUG "AK4114 REG DUMP:\n");
61 	for (i = 0; i < 0x20; i++)
62 		printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
63 }
64 #endif
65 
66 static void snd_ak4114_free(struct ak4114 *chip)
67 {
68 	chip->init = 1;	/* don't schedule new work */
69 	mb();
70 	cancel_delayed_work_sync(&chip->work);
71 	kfree(chip);
72 }
73 
74 static int snd_ak4114_dev_free(struct snd_device *device)
75 {
76 	struct ak4114 *chip = device->device_data;
77 	snd_ak4114_free(chip);
78 	return 0;
79 }
80 
81 int snd_ak4114_create(struct snd_card *card,
82 		      ak4114_read_t *read, ak4114_write_t *write,
83 		      const unsigned char pgm[7], const unsigned char txcsb[5],
84 		      void *private_data, struct ak4114 **r_ak4114)
85 {
86 	struct ak4114 *chip;
87 	int err = 0;
88 	unsigned char reg;
89 	static struct snd_device_ops ops = {
90 		.dev_free =     snd_ak4114_dev_free,
91 	};
92 
93 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
94 	if (chip == NULL)
95 		return -ENOMEM;
96 	spin_lock_init(&chip->lock);
97 	chip->card = card;
98 	chip->read = read;
99 	chip->write = write;
100 	chip->private_data = private_data;
101 	INIT_DELAYED_WORK(&chip->work, ak4114_stats);
102 
103 	for (reg = 0; reg < 7; reg++)
104 		chip->regmap[reg] = pgm[reg];
105 	for (reg = 0; reg < 5; reg++)
106 		chip->txcsb[reg] = txcsb[reg];
107 
108 	ak4114_init_regs(chip);
109 
110 	chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
111 	chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
112 
113 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
114 		goto __fail;
115 
116 	if (r_ak4114)
117 		*r_ak4114 = chip;
118 	return 0;
119 
120       __fail:
121 	snd_ak4114_free(chip);
122 	return err < 0 ? err : -EIO;
123 }
124 
125 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
126 {
127 	if (reg <= AK4114_REG_INT1_MASK)
128 		reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
129 	else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
130 		reg_write(chip, reg,
131 			  (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
132 }
133 
134 static void ak4114_init_regs(struct ak4114 *chip)
135 {
136 	unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
137 
138 	/* bring the chip to reset state and powerdown state */
139 	reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
140 	udelay(200);
141 	/* release reset, but leave powerdown */
142 	reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
143 	udelay(200);
144 	for (reg = 1; reg < 7; reg++)
145 		reg_write(chip, reg, chip->regmap[reg]);
146 	for (reg = 0; reg < 5; reg++)
147 		reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
148 	/* release powerdown, everything is initialized now */
149 	reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
150 }
151 
152 void snd_ak4114_reinit(struct ak4114 *chip)
153 {
154 	chip->init = 1;
155 	mb();
156 	flush_delayed_work_sync(&chip->work);
157 	ak4114_init_regs(chip);
158 	/* bring up statistics / event queing */
159 	chip->init = 0;
160 	if (chip->kctls[0])
161 		schedule_delayed_work(&chip->work, HZ / 10);
162 }
163 
164 static unsigned int external_rate(unsigned char rcs1)
165 {
166 	switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
167 	case AK4114_FS_32000HZ: return 32000;
168 	case AK4114_FS_44100HZ: return 44100;
169 	case AK4114_FS_48000HZ: return 48000;
170 	case AK4114_FS_88200HZ: return 88200;
171 	case AK4114_FS_96000HZ: return 96000;
172 	case AK4114_FS_176400HZ: return 176400;
173 	case AK4114_FS_192000HZ: return 192000;
174 	default:		return 0;
175 	}
176 }
177 
178 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
179 				    struct snd_ctl_elem_info *uinfo)
180 {
181 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
182 	uinfo->count = 1;
183 	uinfo->value.integer.min = 0;
184 	uinfo->value.integer.max = LONG_MAX;
185 	return 0;
186 }
187 
188 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
189 				   struct snd_ctl_elem_value *ucontrol)
190 {
191 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
192 	long *ptr;
193 
194 	spin_lock_irq(&chip->lock);
195 	ptr = (long *)(((char *)chip) + kcontrol->private_value);
196 	ucontrol->value.integer.value[0] = *ptr;
197 	*ptr = 0;
198 	spin_unlock_irq(&chip->lock);
199 	return 0;
200 }
201 
202 #define snd_ak4114_in_bit_info		snd_ctl_boolean_mono_info
203 
204 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
205 				 struct snd_ctl_elem_value *ucontrol)
206 {
207 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
208 	unsigned char reg = kcontrol->private_value & 0xff;
209 	unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
210 	unsigned char inv = (kcontrol->private_value >> 31) & 1;
211 
212 	ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
213 	return 0;
214 }
215 
216 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
217 				struct snd_ctl_elem_info *uinfo)
218 {
219 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
220 	uinfo->count = 1;
221 	uinfo->value.integer.min = 0;
222 	uinfo->value.integer.max = 192000;
223 	return 0;
224 }
225 
226 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
227 			       struct snd_ctl_elem_value *ucontrol)
228 {
229 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
230 
231 	ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
232 	return 0;
233 }
234 
235 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
236 {
237 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
238 	uinfo->count = 1;
239 	return 0;
240 }
241 
242 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
243 				struct snd_ctl_elem_value *ucontrol)
244 {
245 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
246 	unsigned i;
247 
248 	for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
249 		ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
250 	return 0;
251 }
252 
253 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
254 					 struct snd_ctl_elem_value *ucontrol)
255 {
256 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
257 	unsigned i;
258 
259 	for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
260 		ucontrol->value.iec958.status[i] = chip->txcsb[i];
261 	return 0;
262 }
263 
264 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
265 					 struct snd_ctl_elem_value *ucontrol)
266 {
267 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
268 	unsigned i;
269 
270 	for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
271 		reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
272 	return 0;
273 }
274 
275 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
276 {
277 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
278 	uinfo->count = 1;
279 	return 0;
280 }
281 
282 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
283 				      struct snd_ctl_elem_value *ucontrol)
284 {
285 	memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
286 	return 0;
287 }
288 
289 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
290 {
291 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
292 	uinfo->value.integer.min = 0;
293 	uinfo->value.integer.max = 0xffff;
294 	uinfo->count = 4;
295 	return 0;
296 }
297 
298 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
299 				 struct snd_ctl_elem_value *ucontrol)
300 {
301 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
302 	unsigned short tmp;
303 
304 	ucontrol->value.integer.value[0] = 0xf8f2;
305 	ucontrol->value.integer.value[1] = 0x4e1f;
306 	tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
307 	ucontrol->value.integer.value[2] = tmp;
308 	tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
309 	ucontrol->value.integer.value[3] = tmp;
310 	return 0;
311 }
312 
313 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
314 {
315 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
316 	uinfo->count = AK4114_REG_QSUB_SIZE;
317 	return 0;
318 }
319 
320 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
321 				 struct snd_ctl_elem_value *ucontrol)
322 {
323 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
324 	unsigned i;
325 
326 	for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
327 		ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
328 	return 0;
329 }
330 
331 /* Don't forget to change AK4114_CONTROLS define!!! */
332 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
333 {
334 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
335 	.name =		"IEC958 Parity Errors",
336 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
337 	.info =		snd_ak4114_in_error_info,
338 	.get =		snd_ak4114_in_error_get,
339 	.private_value = offsetof(struct ak4114, parity_errors),
340 },
341 {
342 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
343 	.name =		"IEC958 V-Bit Errors",
344 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
345 	.info =		snd_ak4114_in_error_info,
346 	.get =		snd_ak4114_in_error_get,
347 	.private_value = offsetof(struct ak4114, v_bit_errors),
348 },
349 {
350 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
351 	.name =		"IEC958 C-CRC Errors",
352 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
353 	.info =		snd_ak4114_in_error_info,
354 	.get =		snd_ak4114_in_error_get,
355 	.private_value = offsetof(struct ak4114, ccrc_errors),
356 },
357 {
358 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
359 	.name =		"IEC958 Q-CRC Errors",
360 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
361 	.info =		snd_ak4114_in_error_info,
362 	.get =		snd_ak4114_in_error_get,
363 	.private_value = offsetof(struct ak4114, qcrc_errors),
364 },
365 {
366 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
367 	.name =		"IEC958 External Rate",
368 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
369 	.info =		snd_ak4114_rate_info,
370 	.get =		snd_ak4114_rate_get,
371 },
372 {
373 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
374 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
375 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
376 	.info =		snd_ak4114_spdif_mask_info,
377 	.get =		snd_ak4114_spdif_mask_get,
378 },
379 {
380 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
381 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
382 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
383 	.info =		snd_ak4114_spdif_info,
384 	.get =		snd_ak4114_spdif_playback_get,
385 	.put =		snd_ak4114_spdif_playback_put,
386 },
387 {
388 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
389 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
390 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
391 	.info =		snd_ak4114_spdif_mask_info,
392 	.get =		snd_ak4114_spdif_mask_get,
393 },
394 {
395 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
396 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
397 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
398 	.info =		snd_ak4114_spdif_info,
399 	.get =		snd_ak4114_spdif_get,
400 },
401 {
402 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
403 	.name =		"IEC958 Preample Capture Default",
404 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
405 	.info =		snd_ak4114_spdif_pinfo,
406 	.get =		snd_ak4114_spdif_pget,
407 },
408 {
409 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
410 	.name =		"IEC958 Q-subcode Capture Default",
411 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
412 	.info =		snd_ak4114_spdif_qinfo,
413 	.get =		snd_ak4114_spdif_qget,
414 },
415 {
416 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
417 	.name =		"IEC958 Audio",
418 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
419 	.info =		snd_ak4114_in_bit_info,
420 	.get =		snd_ak4114_in_bit_get,
421 	.private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
422 },
423 {
424 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
425 	.name =		"IEC958 Non-PCM Bitstream",
426 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
427 	.info =		snd_ak4114_in_bit_info,
428 	.get =		snd_ak4114_in_bit_get,
429 	.private_value = (6<<8) | AK4114_REG_RCS0,
430 },
431 {
432 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
433 	.name =		"IEC958 DTS Bitstream",
434 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
435 	.info =		snd_ak4114_in_bit_info,
436 	.get =		snd_ak4114_in_bit_get,
437 	.private_value = (3<<8) | AK4114_REG_RCS0,
438 },
439 {
440 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
441 	.name =		"IEC958 PPL Lock Status",
442 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
443 	.info =		snd_ak4114_in_bit_info,
444 	.get =		snd_ak4114_in_bit_get,
445 	.private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
446 }
447 };
448 
449 
450 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
451 		struct snd_info_buffer *buffer)
452 {
453 	struct ak4114 *ak4114 = entry->private_data;
454 	int reg, val;
455 	/* all ak4114 registers 0x00 - 0x1f */
456 	for (reg = 0; reg < 0x20; reg++) {
457 		val = reg_read(ak4114, reg);
458 		snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
459 	}
460 }
461 
462 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
463 {
464 	struct snd_info_entry *entry;
465 	if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
466 		snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
467 }
468 
469 int snd_ak4114_build(struct ak4114 *ak4114,
470 		     struct snd_pcm_substream *ply_substream,
471 		     struct snd_pcm_substream *cap_substream)
472 {
473 	struct snd_kcontrol *kctl;
474 	unsigned int idx;
475 	int err;
476 
477 	if (snd_BUG_ON(!cap_substream))
478 		return -EINVAL;
479 	ak4114->playback_substream = ply_substream;
480 	ak4114->capture_substream = cap_substream;
481 	for (idx = 0; idx < AK4114_CONTROLS; idx++) {
482 		kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
483 		if (kctl == NULL)
484 			return -ENOMEM;
485 		if (strstr(kctl->id.name, "Playback")) {
486 			if (ply_substream == NULL) {
487 				snd_ctl_free_one(kctl);
488 				ak4114->kctls[idx] = NULL;
489 				continue;
490 			}
491 			kctl->id.device = ply_substream->pcm->device;
492 			kctl->id.subdevice = ply_substream->number;
493 		} else {
494 			kctl->id.device = cap_substream->pcm->device;
495 			kctl->id.subdevice = cap_substream->number;
496 		}
497 		err = snd_ctl_add(ak4114->card, kctl);
498 		if (err < 0)
499 			return err;
500 		ak4114->kctls[idx] = kctl;
501 	}
502 	snd_ak4114_proc_init(ak4114);
503 	/* trigger workq */
504 	schedule_delayed_work(&ak4114->work, HZ / 10);
505 	return 0;
506 }
507 
508 /* notify kcontrols if any parameters are changed */
509 static void ak4114_notify(struct ak4114 *ak4114,
510 			  unsigned char rcs0, unsigned char rcs1,
511 			  unsigned char c0, unsigned char c1)
512 {
513 	if (!ak4114->kctls[0])
514 		return;
515 
516 	if (rcs0 & AK4114_PAR)
517 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
518 			       &ak4114->kctls[0]->id);
519 	if (rcs0 & AK4114_V)
520 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
521 			       &ak4114->kctls[1]->id);
522 	if (rcs1 & AK4114_CCRC)
523 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
524 			       &ak4114->kctls[2]->id);
525 	if (rcs1 & AK4114_QCRC)
526 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
527 			       &ak4114->kctls[3]->id);
528 
529 	/* rate change */
530 	if (c1 & 0xf0)
531 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
532 			       &ak4114->kctls[4]->id);
533 
534 	if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
535 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
536 			       &ak4114->kctls[9]->id);
537 	if (c0 & AK4114_QINT)
538 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
539 			       &ak4114->kctls[10]->id);
540 
541 	if (c0 & AK4114_AUDION)
542 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
543 			       &ak4114->kctls[11]->id);
544 	if (c0 & AK4114_AUTO)
545 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
546 			       &ak4114->kctls[12]->id);
547 	if (c0 & AK4114_DTSCD)
548 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
549 			       &ak4114->kctls[13]->id);
550 	if (c0 & AK4114_UNLCK)
551 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
552 			       &ak4114->kctls[14]->id);
553 }
554 
555 int snd_ak4114_external_rate(struct ak4114 *ak4114)
556 {
557 	unsigned char rcs1;
558 
559 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
560 	return external_rate(rcs1);
561 }
562 
563 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
564 {
565 	struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
566 	unsigned long _flags;
567 	int res = 0;
568 	unsigned char rcs0, rcs1;
569 	unsigned char c0, c1;
570 
571 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
572 	if (flags & AK4114_CHECK_NO_STAT)
573 		goto __rate;
574 	rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
575 	spin_lock_irqsave(&ak4114->lock, _flags);
576 	if (rcs0 & AK4114_PAR)
577 		ak4114->parity_errors++;
578 	if (rcs1 & AK4114_V)
579 		ak4114->v_bit_errors++;
580 	if (rcs1 & AK4114_CCRC)
581 		ak4114->ccrc_errors++;
582 	if (rcs1 & AK4114_QCRC)
583 		ak4114->qcrc_errors++;
584 	c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
585                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
586 	c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
587 	ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
588 	ak4114->rcs1 = rcs1;
589 	spin_unlock_irqrestore(&ak4114->lock, _flags);
590 
591 	ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
592 	if (ak4114->change_callback && (c0 | c1) != 0)
593 		ak4114->change_callback(ak4114, c0, c1);
594 
595       __rate:
596 	/* compare rate */
597 	res = external_rate(rcs1);
598 	if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
599 		snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
600 		if (snd_pcm_running(ak4114->capture_substream)) {
601 			// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
602 			snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
603 			res = 1;
604 		}
605 		snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
606 	}
607 	return res;
608 }
609 
610 static void ak4114_stats(struct work_struct *work)
611 {
612 	struct ak4114 *chip = container_of(work, struct ak4114, work.work);
613 
614 	if (!chip->init)
615 		snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
616 
617 	schedule_delayed_work(&chip->work, HZ / 10);
618 }
619 
620 EXPORT_SYMBOL(snd_ak4114_create);
621 EXPORT_SYMBOL(snd_ak4114_reg_write);
622 EXPORT_SYMBOL(snd_ak4114_reinit);
623 EXPORT_SYMBOL(snd_ak4114_build);
624 EXPORT_SYMBOL(snd_ak4114_external_rate);
625 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
626