ALSA: i2c: Constify snd_kcontrol_new items
[muen/linux.git] / sound / i2c / other / ak4113.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Routines for control of the AK4113 via I2C/4-wire serial interface
4  *  IEC958 (S/PDIF) receiver by Asahi Kasei
5  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6  *  Copyright (c) by Pavel Hofman <pavel.hofman@ivitera.com>
7  */
8
9 #include <linux/slab.h>
10 #include <linux/delay.h>
11 #include <linux/module.h>
12 #include <sound/core.h>
13 #include <sound/control.h>
14 #include <sound/pcm.h>
15 #include <sound/ak4113.h>
16 #include <sound/asoundef.h>
17 #include <sound/info.h>
18
19 MODULE_AUTHOR("Pavel Hofman <pavel.hofman@ivitera.com>");
20 MODULE_DESCRIPTION("AK4113 IEC958 (S/PDIF) receiver by Asahi Kasei");
21 MODULE_LICENSE("GPL");
22
23 #define AK4113_ADDR                     0x00 /* fixed address */
24
25 static void ak4113_stats(struct work_struct *work);
26 static void ak4113_init_regs(struct ak4113 *chip);
27
28
29 static void reg_write(struct ak4113 *ak4113, unsigned char reg,
30                 unsigned char val)
31 {
32         ak4113->write(ak4113->private_data, reg, val);
33         if (reg < sizeof(ak4113->regmap))
34                 ak4113->regmap[reg] = val;
35 }
36
37 static inline unsigned char reg_read(struct ak4113 *ak4113, unsigned char reg)
38 {
39         return ak4113->read(ak4113->private_data, reg);
40 }
41
42 static void snd_ak4113_free(struct ak4113 *chip)
43 {
44         atomic_inc(&chip->wq_processing);       /* don't schedule new work */
45         cancel_delayed_work_sync(&chip->work);
46         kfree(chip);
47 }
48
49 static int snd_ak4113_dev_free(struct snd_device *device)
50 {
51         struct ak4113 *chip = device->device_data;
52         snd_ak4113_free(chip);
53         return 0;
54 }
55
56 int snd_ak4113_create(struct snd_card *card, ak4113_read_t *read,
57                 ak4113_write_t *write, const unsigned char *pgm,
58                 void *private_data, struct ak4113 **r_ak4113)
59 {
60         struct ak4113 *chip;
61         int err;
62         unsigned char reg;
63         static const struct snd_device_ops ops = {
64                 .dev_free =     snd_ak4113_dev_free,
65         };
66
67         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
68         if (chip == NULL)
69                 return -ENOMEM;
70         spin_lock_init(&chip->lock);
71         chip->card = card;
72         chip->read = read;
73         chip->write = write;
74         chip->private_data = private_data;
75         INIT_DELAYED_WORK(&chip->work, ak4113_stats);
76         atomic_set(&chip->wq_processing, 0);
77         mutex_init(&chip->reinit_mutex);
78
79         for (reg = 0; reg < AK4113_WRITABLE_REGS ; reg++)
80                 chip->regmap[reg] = pgm[reg];
81         ak4113_init_regs(chip);
82
83         chip->rcs0 = reg_read(chip, AK4113_REG_RCS0) & ~(AK4113_QINT |
84                         AK4113_CINT | AK4113_STC);
85         chip->rcs1 = reg_read(chip, AK4113_REG_RCS1);
86         chip->rcs2 = reg_read(chip, AK4113_REG_RCS2);
87         err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
88         if (err < 0)
89                 goto __fail;
90
91         if (r_ak4113)
92                 *r_ak4113 = chip;
93         return 0;
94
95 __fail:
96         snd_ak4113_free(chip);
97         return err;
98 }
99 EXPORT_SYMBOL_GPL(snd_ak4113_create);
100
101 void snd_ak4113_reg_write(struct ak4113 *chip, unsigned char reg,
102                 unsigned char mask, unsigned char val)
103 {
104         if (reg >= AK4113_WRITABLE_REGS)
105                 return;
106         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
107 }
108 EXPORT_SYMBOL_GPL(snd_ak4113_reg_write);
109
110 static void ak4113_init_regs(struct ak4113 *chip)
111 {
112         unsigned char old = chip->regmap[AK4113_REG_PWRDN], reg;
113
114         /* bring the chip to reset state and powerdown state */
115         reg_write(chip, AK4113_REG_PWRDN, old & ~(AK4113_RST|AK4113_PWN));
116         udelay(200);
117         /* release reset, but leave powerdown */
118         reg_write(chip, AK4113_REG_PWRDN, (old | AK4113_RST) & ~AK4113_PWN);
119         udelay(200);
120         for (reg = 1; reg < AK4113_WRITABLE_REGS; reg++)
121                 reg_write(chip, reg, chip->regmap[reg]);
122         /* release powerdown, everything is initialized now */
123         reg_write(chip, AK4113_REG_PWRDN, old | AK4113_RST | AK4113_PWN);
124 }
125
126 void snd_ak4113_reinit(struct ak4113 *chip)
127 {
128         if (atomic_inc_return(&chip->wq_processing) == 1)
129                 cancel_delayed_work_sync(&chip->work);
130         mutex_lock(&chip->reinit_mutex);
131         ak4113_init_regs(chip);
132         mutex_unlock(&chip->reinit_mutex);
133         /* bring up statistics / event queing */
134         if (atomic_dec_and_test(&chip->wq_processing))
135                 schedule_delayed_work(&chip->work, HZ / 10);
136 }
137 EXPORT_SYMBOL_GPL(snd_ak4113_reinit);
138
139 static unsigned int external_rate(unsigned char rcs1)
140 {
141         switch (rcs1 & (AK4113_FS0|AK4113_FS1|AK4113_FS2|AK4113_FS3)) {
142         case AK4113_FS_8000HZ:
143                 return 8000;
144         case AK4113_FS_11025HZ:
145                 return 11025;
146         case AK4113_FS_16000HZ:
147                 return 16000;
148         case AK4113_FS_22050HZ:
149                 return 22050;
150         case AK4113_FS_24000HZ:
151                 return 24000;
152         case AK4113_FS_32000HZ:
153                 return 32000;
154         case AK4113_FS_44100HZ:
155                 return 44100;
156         case AK4113_FS_48000HZ:
157                 return 48000;
158         case AK4113_FS_64000HZ:
159                 return 64000;
160         case AK4113_FS_88200HZ:
161                 return 88200;
162         case AK4113_FS_96000HZ:
163                 return 96000;
164         case AK4113_FS_176400HZ:
165                 return 176400;
166         case AK4113_FS_192000HZ:
167                 return 192000;
168         default:
169                 return 0;
170         }
171 }
172
173 static int snd_ak4113_in_error_info(struct snd_kcontrol *kcontrol,
174                                     struct snd_ctl_elem_info *uinfo)
175 {
176         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
177         uinfo->count = 1;
178         uinfo->value.integer.min = 0;
179         uinfo->value.integer.max = LONG_MAX;
180         return 0;
181 }
182
183 static int snd_ak4113_in_error_get(struct snd_kcontrol *kcontrol,
184                                    struct snd_ctl_elem_value *ucontrol)
185 {
186         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
187
188         spin_lock_irq(&chip->lock);
189         ucontrol->value.integer.value[0] =
190                 chip->errors[kcontrol->private_value];
191         chip->errors[kcontrol->private_value] = 0;
192         spin_unlock_irq(&chip->lock);
193         return 0;
194 }
195
196 #define snd_ak4113_in_bit_info          snd_ctl_boolean_mono_info
197
198 static int snd_ak4113_in_bit_get(struct snd_kcontrol *kcontrol,
199                                  struct snd_ctl_elem_value *ucontrol)
200 {
201         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
202         unsigned char reg = kcontrol->private_value & 0xff;
203         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
204         unsigned char inv = (kcontrol->private_value >> 31) & 1;
205
206         ucontrol->value.integer.value[0] =
207                 ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
208         return 0;
209 }
210
211 static int snd_ak4113_rx_info(struct snd_kcontrol *kcontrol,
212                               struct snd_ctl_elem_info *uinfo)
213 {
214         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
215         uinfo->count = 1;
216         uinfo->value.integer.min = 0;
217         uinfo->value.integer.max = 5;
218         return 0;
219 }
220
221 static int snd_ak4113_rx_get(struct snd_kcontrol *kcontrol,
222                              struct snd_ctl_elem_value *ucontrol)
223 {
224         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
225
226         ucontrol->value.integer.value[0] =
227                 (AK4113_IPS(chip->regmap[AK4113_REG_IO1]));
228         return 0;
229 }
230
231 static int snd_ak4113_rx_put(struct snd_kcontrol *kcontrol,
232                              struct snd_ctl_elem_value *ucontrol)
233 {
234         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
235         int change;
236         u8 old_val;
237
238         spin_lock_irq(&chip->lock);
239         old_val = chip->regmap[AK4113_REG_IO1];
240         change = ucontrol->value.integer.value[0] != AK4113_IPS(old_val);
241         if (change)
242                 reg_write(chip, AK4113_REG_IO1,
243                                 (old_val & (~AK4113_IPS(0xff))) |
244                                 (AK4113_IPS(ucontrol->value.integer.value[0])));
245         spin_unlock_irq(&chip->lock);
246         return change;
247 }
248
249 static int snd_ak4113_rate_info(struct snd_kcontrol *kcontrol,
250                                 struct snd_ctl_elem_info *uinfo)
251 {
252         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
253         uinfo->count = 1;
254         uinfo->value.integer.min = 0;
255         uinfo->value.integer.max = 192000;
256         return 0;
257 }
258
259 static int snd_ak4113_rate_get(struct snd_kcontrol *kcontrol,
260                                struct snd_ctl_elem_value *ucontrol)
261 {
262         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
263
264         ucontrol->value.integer.value[0] = external_rate(reg_read(chip,
265                                 AK4113_REG_RCS1));
266         return 0;
267 }
268
269 static int snd_ak4113_spdif_info(struct snd_kcontrol *kcontrol,
270                 struct snd_ctl_elem_info *uinfo)
271 {
272         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
273         uinfo->count = 1;
274         return 0;
275 }
276
277 static int snd_ak4113_spdif_get(struct snd_kcontrol *kcontrol,
278                                 struct snd_ctl_elem_value *ucontrol)
279 {
280         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
281         unsigned i;
282
283         for (i = 0; i < AK4113_REG_RXCSB_SIZE; i++)
284                 ucontrol->value.iec958.status[i] = reg_read(chip,
285                                 AK4113_REG_RXCSB0 + i);
286         return 0;
287 }
288
289 static int snd_ak4113_spdif_mask_info(struct snd_kcontrol *kcontrol,
290                 struct snd_ctl_elem_info *uinfo)
291 {
292         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
293         uinfo->count = 1;
294         return 0;
295 }
296
297 static int snd_ak4113_spdif_mask_get(struct snd_kcontrol *kcontrol,
298                                       struct snd_ctl_elem_value *ucontrol)
299 {
300         memset(ucontrol->value.iec958.status, 0xff, AK4113_REG_RXCSB_SIZE);
301         return 0;
302 }
303
304 static int snd_ak4113_spdif_pinfo(struct snd_kcontrol *kcontrol,
305                 struct snd_ctl_elem_info *uinfo)
306 {
307         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
308         uinfo->value.integer.min = 0;
309         uinfo->value.integer.max = 0xffff;
310         uinfo->count = 4;
311         return 0;
312 }
313
314 static int snd_ak4113_spdif_pget(struct snd_kcontrol *kcontrol,
315                                  struct snd_ctl_elem_value *ucontrol)
316 {
317         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
318         unsigned short tmp;
319
320         ucontrol->value.integer.value[0] = 0xf8f2;
321         ucontrol->value.integer.value[1] = 0x4e1f;
322         tmp = reg_read(chip, AK4113_REG_Pc0) |
323                 (reg_read(chip, AK4113_REG_Pc1) << 8);
324         ucontrol->value.integer.value[2] = tmp;
325         tmp = reg_read(chip, AK4113_REG_Pd0) |
326                 (reg_read(chip, AK4113_REG_Pd1) << 8);
327         ucontrol->value.integer.value[3] = tmp;
328         return 0;
329 }
330
331 static int snd_ak4113_spdif_qinfo(struct snd_kcontrol *kcontrol,
332                 struct snd_ctl_elem_info *uinfo)
333 {
334         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
335         uinfo->count = AK4113_REG_QSUB_SIZE;
336         return 0;
337 }
338
339 static int snd_ak4113_spdif_qget(struct snd_kcontrol *kcontrol,
340                                  struct snd_ctl_elem_value *ucontrol)
341 {
342         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
343         unsigned i;
344
345         for (i = 0; i < AK4113_REG_QSUB_SIZE; i++)
346                 ucontrol->value.bytes.data[i] = reg_read(chip,
347                                 AK4113_REG_QSUB_ADDR + i);
348         return 0;
349 }
350
351 /* Don't forget to change AK4113_CONTROLS define!!! */
352 static const struct snd_kcontrol_new snd_ak4113_iec958_controls[] = {
353 {
354         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
355         .name =         "IEC958 Parity Errors",
356         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
357                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
358         .info =         snd_ak4113_in_error_info,
359         .get =          snd_ak4113_in_error_get,
360         .private_value = AK4113_PARITY_ERRORS,
361 },
362 {
363         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
364         .name =         "IEC958 V-Bit Errors",
365         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
366                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
367         .info =         snd_ak4113_in_error_info,
368         .get =          snd_ak4113_in_error_get,
369         .private_value = AK4113_V_BIT_ERRORS,
370 },
371 {
372         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
373         .name =         "IEC958 C-CRC Errors",
374         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
375                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
376         .info =         snd_ak4113_in_error_info,
377         .get =          snd_ak4113_in_error_get,
378         .private_value = AK4113_CCRC_ERRORS,
379 },
380 {
381         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
382         .name =         "IEC958 Q-CRC Errors",
383         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
384                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
385         .info =         snd_ak4113_in_error_info,
386         .get =          snd_ak4113_in_error_get,
387         .private_value = AK4113_QCRC_ERRORS,
388 },
389 {
390         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
391         .name =         "IEC958 External Rate",
392         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
393                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
394         .info =         snd_ak4113_rate_info,
395         .get =          snd_ak4113_rate_get,
396 },
397 {
398         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
399         .name =         SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
400         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
401         .info =         snd_ak4113_spdif_mask_info,
402         .get =          snd_ak4113_spdif_mask_get,
403 },
404 {
405         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
406         .name =         SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
407         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
408                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
409         .info =         snd_ak4113_spdif_info,
410         .get =          snd_ak4113_spdif_get,
411 },
412 {
413         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
414         .name =         "IEC958 Preamble Capture Default",
415         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
416                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
417         .info =         snd_ak4113_spdif_pinfo,
418         .get =          snd_ak4113_spdif_pget,
419 },
420 {
421         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
422         .name =         "IEC958 Q-subcode Capture Default",
423         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
424                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
425         .info =         snd_ak4113_spdif_qinfo,
426         .get =          snd_ak4113_spdif_qget,
427 },
428 {
429         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
430         .name =         "IEC958 Audio",
431         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
432                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
433         .info =         snd_ak4113_in_bit_info,
434         .get =          snd_ak4113_in_bit_get,
435         .private_value = (1<<31) | (1<<8) | AK4113_REG_RCS0,
436 },
437 {
438         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
439         .name =         "IEC958 Non-PCM Bitstream",
440         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
441                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
442         .info =         snd_ak4113_in_bit_info,
443         .get =          snd_ak4113_in_bit_get,
444         .private_value = (0<<8) | AK4113_REG_RCS1,
445 },
446 {
447         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
448         .name =         "IEC958 DTS Bitstream",
449         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
450                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
451         .info =         snd_ak4113_in_bit_info,
452         .get =          snd_ak4113_in_bit_get,
453         .private_value = (1<<8) | AK4113_REG_RCS1,
454 },
455 {
456         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
457         .name =         "AK4113 Input Select",
458         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
459                 SNDRV_CTL_ELEM_ACCESS_WRITE,
460         .info =         snd_ak4113_rx_info,
461         .get =          snd_ak4113_rx_get,
462         .put =          snd_ak4113_rx_put,
463 }
464 };
465
466 static void snd_ak4113_proc_regs_read(struct snd_info_entry *entry,
467                 struct snd_info_buffer *buffer)
468 {
469         struct ak4113 *ak4113 = entry->private_data;
470         int reg, val;
471         /* all ak4113 registers 0x00 - 0x1c */
472         for (reg = 0; reg < 0x1d; reg++) {
473                 val = reg_read(ak4113, reg);
474                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
475         }
476 }
477
478 static void snd_ak4113_proc_init(struct ak4113 *ak4113)
479 {
480         snd_card_ro_proc_new(ak4113->card, "ak4113", ak4113,
481                              snd_ak4113_proc_regs_read);
482 }
483
484 int snd_ak4113_build(struct ak4113 *ak4113,
485                 struct snd_pcm_substream *cap_substream)
486 {
487         struct snd_kcontrol *kctl;
488         unsigned int idx;
489         int err;
490
491         if (snd_BUG_ON(!cap_substream))
492                 return -EINVAL;
493         ak4113->substream = cap_substream;
494         for (idx = 0; idx < AK4113_CONTROLS; idx++) {
495                 kctl = snd_ctl_new1(&snd_ak4113_iec958_controls[idx], ak4113);
496                 if (kctl == NULL)
497                         return -ENOMEM;
498                 kctl->id.device = cap_substream->pcm->device;
499                 kctl->id.subdevice = cap_substream->number;
500                 err = snd_ctl_add(ak4113->card, kctl);
501                 if (err < 0)
502                         return err;
503                 ak4113->kctls[idx] = kctl;
504         }
505         snd_ak4113_proc_init(ak4113);
506         /* trigger workq */
507         schedule_delayed_work(&ak4113->work, HZ / 10);
508         return 0;
509 }
510 EXPORT_SYMBOL_GPL(snd_ak4113_build);
511
512 int snd_ak4113_external_rate(struct ak4113 *ak4113)
513 {
514         unsigned char rcs1;
515
516         rcs1 = reg_read(ak4113, AK4113_REG_RCS1);
517         return external_rate(rcs1);
518 }
519 EXPORT_SYMBOL_GPL(snd_ak4113_external_rate);
520
521 int snd_ak4113_check_rate_and_errors(struct ak4113 *ak4113, unsigned int flags)
522 {
523         struct snd_pcm_runtime *runtime =
524                 ak4113->substream ? ak4113->substream->runtime : NULL;
525         unsigned long _flags;
526         int res = 0;
527         unsigned char rcs0, rcs1, rcs2;
528         unsigned char c0, c1;
529
530         rcs1 = reg_read(ak4113, AK4113_REG_RCS1);
531         if (flags & AK4113_CHECK_NO_STAT)
532                 goto __rate;
533         rcs0 = reg_read(ak4113, AK4113_REG_RCS0);
534         rcs2 = reg_read(ak4113, AK4113_REG_RCS2);
535         spin_lock_irqsave(&ak4113->lock, _flags);
536         if (rcs0 & AK4113_PAR)
537                 ak4113->errors[AK4113_PARITY_ERRORS]++;
538         if (rcs0 & AK4113_V)
539                 ak4113->errors[AK4113_V_BIT_ERRORS]++;
540         if (rcs2 & AK4113_CCRC)
541                 ak4113->errors[AK4113_CCRC_ERRORS]++;
542         if (rcs2 & AK4113_QCRC)
543                 ak4113->errors[AK4113_QCRC_ERRORS]++;
544         c0 = (ak4113->rcs0 & (AK4113_QINT | AK4113_CINT | AK4113_STC |
545                                 AK4113_AUDION | AK4113_AUTO | AK4113_UNLCK)) ^
546                 (rcs0 & (AK4113_QINT | AK4113_CINT | AK4113_STC |
547                          AK4113_AUDION | AK4113_AUTO | AK4113_UNLCK));
548         c1 = (ak4113->rcs1 & (AK4113_DTSCD | AK4113_NPCM | AK4113_PEM |
549                                 AK4113_DAT | 0xf0)) ^
550                 (rcs1 & (AK4113_DTSCD | AK4113_NPCM | AK4113_PEM |
551                          AK4113_DAT | 0xf0));
552         ak4113->rcs0 = rcs0 & ~(AK4113_QINT | AK4113_CINT | AK4113_STC);
553         ak4113->rcs1 = rcs1;
554         ak4113->rcs2 = rcs2;
555         spin_unlock_irqrestore(&ak4113->lock, _flags);
556
557         if (rcs0 & AK4113_PAR)
558                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
559                                 &ak4113->kctls[0]->id);
560         if (rcs0 & AK4113_V)
561                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
562                                 &ak4113->kctls[1]->id);
563         if (rcs2 & AK4113_CCRC)
564                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
565                                 &ak4113->kctls[2]->id);
566         if (rcs2 & AK4113_QCRC)
567                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
568                                 &ak4113->kctls[3]->id);
569
570         /* rate change */
571         if (c1 & 0xf0)
572                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
573                                 &ak4113->kctls[4]->id);
574
575         if ((c1 & AK4113_PEM) | (c0 & AK4113_CINT))
576                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
577                                 &ak4113->kctls[6]->id);
578         if (c0 & AK4113_QINT)
579                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
580                                 &ak4113->kctls[8]->id);
581
582         if (c0 & AK4113_AUDION)
583                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
584                                 &ak4113->kctls[9]->id);
585         if (c1 & AK4113_NPCM)
586                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
587                                 &ak4113->kctls[10]->id);
588         if (c1 & AK4113_DTSCD)
589                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
590                                 &ak4113->kctls[11]->id);
591
592         if (ak4113->change_callback && (c0 | c1) != 0)
593                 ak4113->change_callback(ak4113, c0, c1);
594
595 __rate:
596         /* compare rate */
597         res = external_rate(rcs1);
598         if (!(flags & AK4113_CHECK_NO_RATE) && runtime &&
599                         (runtime->rate != res)) {
600                 snd_pcm_stream_lock_irqsave(ak4113->substream, _flags);
601                 if (snd_pcm_running(ak4113->substream)) {
602                         /*printk(KERN_DEBUG "rate changed (%i <- %i)\n",
603                          * runtime->rate, res); */
604                         snd_pcm_stop(ak4113->substream,
605                                         SNDRV_PCM_STATE_DRAINING);
606                         wake_up(&runtime->sleep);
607                         res = 1;
608                 }
609                 snd_pcm_stream_unlock_irqrestore(ak4113->substream, _flags);
610         }
611         return res;
612 }
613 EXPORT_SYMBOL_GPL(snd_ak4113_check_rate_and_errors);
614
615 static void ak4113_stats(struct work_struct *work)
616 {
617         struct ak4113 *chip = container_of(work, struct ak4113, work.work);
618
619         if (atomic_inc_return(&chip->wq_processing) == 1)
620                 snd_ak4113_check_rate_and_errors(chip, chip->check_flags);
621
622         if (atomic_dec_and_test(&chip->wq_processing))
623                 schedule_delayed_work(&chip->work, HZ / 10);
624 }
625
626 #ifdef CONFIG_PM
627 void snd_ak4113_suspend(struct ak4113 *chip)
628 {
629         atomic_inc(&chip->wq_processing); /* don't schedule new work */
630         cancel_delayed_work_sync(&chip->work);
631 }
632 EXPORT_SYMBOL(snd_ak4113_suspend);
633
634 void snd_ak4113_resume(struct ak4113 *chip)
635 {
636         atomic_dec(&chip->wq_processing);
637         snd_ak4113_reinit(chip);
638 }
639 EXPORT_SYMBOL(snd_ak4113_resume);
640 #endif