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23#include <linux/slab.h>
24#include <linux/delay.h>
25#include <linux/module.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#include <sound/info.h>
32
33MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
34MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
35MODULE_LICENSE("GPL");
36
37#define AK4114_ADDR 0x00
38
39static void ak4114_stats(struct work_struct *work);
40static void ak4114_init_regs(struct ak4114 *chip);
41
42static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
43{
44 ak4114->write(ak4114->private_data, reg, val);
45 if (reg <= AK4114_REG_INT1_MASK)
46 ak4114->regmap[reg] = val;
47 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
48 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
49}
50
51static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
52{
53 return ak4114->read(ak4114->private_data, reg);
54}
55
56#if 0
57static void reg_dump(struct ak4114 *ak4114)
58{
59 int i;
60
61 printk(KERN_DEBUG "AK4114 REG DUMP:\n");
62 for (i = 0; i < 0x20; i++)
63 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0);
64}
65#endif
66
67static void snd_ak4114_free(struct ak4114 *chip)
68{
69 atomic_inc(&chip->wq_processing);
70 cancel_delayed_work_sync(&chip->work);
71 kfree(chip);
72}
73
74static 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
81int snd_ak4114_create(struct snd_card *card,
82 ak4114_read_t *read, ak4114_write_t *write,
83 const unsigned char pgm[6], 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 atomic_set(&chip->wq_processing, 0);
103 mutex_init(&chip->reinit_mutex);
104
105 for (reg = 0; reg < 6; reg++)
106 chip->regmap[reg] = pgm[reg];
107 for (reg = 0; reg < 5; reg++)
108 chip->txcsb[reg] = txcsb[reg];
109
110 ak4114_init_regs(chip);
111
112 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
113 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
114
115 if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
116 goto __fail;
117
118 if (r_ak4114)
119 *r_ak4114 = chip;
120 return 0;
121
122 __fail:
123 snd_ak4114_free(chip);
124 return err;
125}
126EXPORT_SYMBOL(snd_ak4114_create);
127
128void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
129{
130 if (reg <= AK4114_REG_INT1_MASK)
131 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
132 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
133 reg_write(chip, reg,
134 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
135}
136EXPORT_SYMBOL(snd_ak4114_reg_write);
137
138static void ak4114_init_regs(struct ak4114 *chip)
139{
140 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
141
142
143 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
144 udelay(200);
145
146 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
147 udelay(200);
148 for (reg = 1; reg < 6; reg++)
149 reg_write(chip, reg, chip->regmap[reg]);
150 for (reg = 0; reg < 5; reg++)
151 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
152
153 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
154}
155
156void snd_ak4114_reinit(struct ak4114 *chip)
157{
158 if (atomic_inc_return(&chip->wq_processing) == 1)
159 cancel_delayed_work_sync(&chip->work);
160 mutex_lock(&chip->reinit_mutex);
161 ak4114_init_regs(chip);
162 mutex_unlock(&chip->reinit_mutex);
163
164 if (atomic_dec_and_test(&chip->wq_processing))
165 schedule_delayed_work(&chip->work, HZ / 10);
166}
167EXPORT_SYMBOL(snd_ak4114_reinit);
168
169static unsigned int external_rate(unsigned char rcs1)
170{
171 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
172 case AK4114_FS_32000HZ: return 32000;
173 case AK4114_FS_44100HZ: return 44100;
174 case AK4114_FS_48000HZ: return 48000;
175 case AK4114_FS_88200HZ: return 88200;
176 case AK4114_FS_96000HZ: return 96000;
177 case AK4114_FS_176400HZ: return 176400;
178 case AK4114_FS_192000HZ: return 192000;
179 default: return 0;
180 }
181}
182
183static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
184 struct snd_ctl_elem_info *uinfo)
185{
186 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
187 uinfo->count = 1;
188 uinfo->value.integer.min = 0;
189 uinfo->value.integer.max = LONG_MAX;
190 return 0;
191}
192
193static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
194 struct snd_ctl_elem_value *ucontrol)
195{
196 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
197 long *ptr;
198
199 spin_lock_irq(&chip->lock);
200 ptr = (long *)(((char *)chip) + kcontrol->private_value);
201 ucontrol->value.integer.value[0] = *ptr;
202 *ptr = 0;
203 spin_unlock_irq(&chip->lock);
204 return 0;
205}
206
207#define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info
208
209static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
210 struct snd_ctl_elem_value *ucontrol)
211{
212 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
213 unsigned char reg = kcontrol->private_value & 0xff;
214 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
215 unsigned char inv = (kcontrol->private_value >> 31) & 1;
216
217 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
218 return 0;
219}
220
221static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
222 struct snd_ctl_elem_info *uinfo)
223{
224 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
225 uinfo->count = 1;
226 uinfo->value.integer.min = 0;
227 uinfo->value.integer.max = 192000;
228 return 0;
229}
230
231static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
232 struct snd_ctl_elem_value *ucontrol)
233{
234 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
235
236 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
237 return 0;
238}
239
240static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
241{
242 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
243 uinfo->count = 1;
244 return 0;
245}
246
247static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
248 struct snd_ctl_elem_value *ucontrol)
249{
250 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
251 unsigned i;
252
253 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
254 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
255 return 0;
256}
257
258static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
259 struct snd_ctl_elem_value *ucontrol)
260{
261 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
262 unsigned i;
263
264 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
265 ucontrol->value.iec958.status[i] = chip->txcsb[i];
266 return 0;
267}
268
269static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
270 struct snd_ctl_elem_value *ucontrol)
271{
272 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
273 unsigned i;
274
275 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
276 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
277 return 0;
278}
279
280static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
281{
282 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
283 uinfo->count = 1;
284 return 0;
285}
286
287static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
288 struct snd_ctl_elem_value *ucontrol)
289{
290 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
291 return 0;
292}
293
294static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
295{
296 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
297 uinfo->value.integer.min = 0;
298 uinfo->value.integer.max = 0xffff;
299 uinfo->count = 4;
300 return 0;
301}
302
303static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
304 struct snd_ctl_elem_value *ucontrol)
305{
306 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
307 unsigned short tmp;
308
309 ucontrol->value.integer.value[0] = 0xf8f2;
310 ucontrol->value.integer.value[1] = 0x4e1f;
311 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
312 ucontrol->value.integer.value[2] = tmp;
313 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
314 ucontrol->value.integer.value[3] = tmp;
315 return 0;
316}
317
318static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
319{
320 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
321 uinfo->count = AK4114_REG_QSUB_SIZE;
322 return 0;
323}
324
325static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
326 struct snd_ctl_elem_value *ucontrol)
327{
328 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
329 unsigned i;
330
331 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
332 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
333 return 0;
334}
335
336
337static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
338{
339 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
340 .name = "IEC958 Parity Errors",
341 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
342 .info = snd_ak4114_in_error_info,
343 .get = snd_ak4114_in_error_get,
344 .private_value = offsetof(struct ak4114, parity_errors),
345},
346{
347 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
348 .name = "IEC958 V-Bit Errors",
349 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
350 .info = snd_ak4114_in_error_info,
351 .get = snd_ak4114_in_error_get,
352 .private_value = offsetof(struct ak4114, v_bit_errors),
353},
354{
355 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
356 .name = "IEC958 C-CRC Errors",
357 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
358 .info = snd_ak4114_in_error_info,
359 .get = snd_ak4114_in_error_get,
360 .private_value = offsetof(struct ak4114, ccrc_errors),
361},
362{
363 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
364 .name = "IEC958 Q-CRC Errors",
365 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
366 .info = snd_ak4114_in_error_info,
367 .get = snd_ak4114_in_error_get,
368 .private_value = offsetof(struct ak4114, qcrc_errors),
369},
370{
371 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
372 .name = "IEC958 External Rate",
373 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
374 .info = snd_ak4114_rate_info,
375 .get = snd_ak4114_rate_get,
376},
377{
378 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
379 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
380 .access = SNDRV_CTL_ELEM_ACCESS_READ,
381 .info = snd_ak4114_spdif_mask_info,
382 .get = snd_ak4114_spdif_mask_get,
383},
384{
385 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
386 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
387 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
388 .info = snd_ak4114_spdif_info,
389 .get = snd_ak4114_spdif_playback_get,
390 .put = snd_ak4114_spdif_playback_put,
391},
392{
393 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
394 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
395 .access = SNDRV_CTL_ELEM_ACCESS_READ,
396 .info = snd_ak4114_spdif_mask_info,
397 .get = snd_ak4114_spdif_mask_get,
398},
399{
400 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
401 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
402 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
403 .info = snd_ak4114_spdif_info,
404 .get = snd_ak4114_spdif_get,
405},
406{
407 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
408 .name = "IEC958 Preamble Capture Default",
409 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
410 .info = snd_ak4114_spdif_pinfo,
411 .get = snd_ak4114_spdif_pget,
412},
413{
414 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
415 .name = "IEC958 Q-subcode Capture Default",
416 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
417 .info = snd_ak4114_spdif_qinfo,
418 .get = snd_ak4114_spdif_qget,
419},
420{
421 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
422 .name = "IEC958 Audio",
423 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
424 .info = snd_ak4114_in_bit_info,
425 .get = snd_ak4114_in_bit_get,
426 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
427},
428{
429 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
430 .name = "IEC958 Non-PCM Bitstream",
431 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
432 .info = snd_ak4114_in_bit_info,
433 .get = snd_ak4114_in_bit_get,
434 .private_value = (6<<8) | AK4114_REG_RCS0,
435},
436{
437 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
438 .name = "IEC958 DTS Bitstream",
439 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
440 .info = snd_ak4114_in_bit_info,
441 .get = snd_ak4114_in_bit_get,
442 .private_value = (3<<8) | AK4114_REG_RCS0,
443},
444{
445 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
446 .name = "IEC958 PPL Lock Status",
447 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
448 .info = snd_ak4114_in_bit_info,
449 .get = snd_ak4114_in_bit_get,
450 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
451}
452};
453
454
455static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
456 struct snd_info_buffer *buffer)
457{
458 struct ak4114 *ak4114 = entry->private_data;
459 int reg, val;
460
461 for (reg = 0; reg < 0x20; reg++) {
462 val = reg_read(ak4114, reg);
463 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
464 }
465}
466
467static void snd_ak4114_proc_init(struct ak4114 *ak4114)
468{
469 struct snd_info_entry *entry;
470 if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
471 snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
472}
473
474int snd_ak4114_build(struct ak4114 *ak4114,
475 struct snd_pcm_substream *ply_substream,
476 struct snd_pcm_substream *cap_substream)
477{
478 struct snd_kcontrol *kctl;
479 unsigned int idx;
480 int err;
481
482 if (snd_BUG_ON(!cap_substream))
483 return -EINVAL;
484 ak4114->playback_substream = ply_substream;
485 ak4114->capture_substream = cap_substream;
486 for (idx = 0; idx < AK4114_CONTROLS; idx++) {
487 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
488 if (kctl == NULL)
489 return -ENOMEM;
490 if (strstr(kctl->id.name, "Playback")) {
491 if (ply_substream == NULL) {
492 snd_ctl_free_one(kctl);
493 ak4114->kctls[idx] = NULL;
494 continue;
495 }
496 kctl->id.device = ply_substream->pcm->device;
497 kctl->id.subdevice = ply_substream->number;
498 } else {
499 kctl->id.device = cap_substream->pcm->device;
500 kctl->id.subdevice = cap_substream->number;
501 }
502 err = snd_ctl_add(ak4114->card, kctl);
503 if (err < 0)
504 return err;
505 ak4114->kctls[idx] = kctl;
506 }
507 snd_ak4114_proc_init(ak4114);
508
509 schedule_delayed_work(&ak4114->work, HZ / 10);
510 return 0;
511}
512EXPORT_SYMBOL(snd_ak4114_build);
513
514
515static void ak4114_notify(struct ak4114 *ak4114,
516 unsigned char rcs0, unsigned char rcs1,
517 unsigned char c0, unsigned char c1)
518{
519 if (!ak4114->kctls[0])
520 return;
521
522 if (rcs0 & AK4114_PAR)
523 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
524 &ak4114->kctls[0]->id);
525 if (rcs0 & AK4114_V)
526 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
527 &ak4114->kctls[1]->id);
528 if (rcs1 & AK4114_CCRC)
529 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
530 &ak4114->kctls[2]->id);
531 if (rcs1 & AK4114_QCRC)
532 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
533 &ak4114->kctls[3]->id);
534
535
536 if (c1 & 0xf0)
537 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
538 &ak4114->kctls[4]->id);
539
540 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
541 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
542 &ak4114->kctls[9]->id);
543 if (c0 & AK4114_QINT)
544 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
545 &ak4114->kctls[10]->id);
546
547 if (c0 & AK4114_AUDION)
548 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
549 &ak4114->kctls[11]->id);
550 if (c0 & AK4114_AUTO)
551 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
552 &ak4114->kctls[12]->id);
553 if (c0 & AK4114_DTSCD)
554 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
555 &ak4114->kctls[13]->id);
556 if (c0 & AK4114_UNLCK)
557 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
558 &ak4114->kctls[14]->id);
559}
560
561int snd_ak4114_external_rate(struct ak4114 *ak4114)
562{
563 unsigned char rcs1;
564
565 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
566 return external_rate(rcs1);
567}
568EXPORT_SYMBOL(snd_ak4114_external_rate);
569
570int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
571{
572 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
573 unsigned long _flags;
574 int res = 0;
575 unsigned char rcs0, rcs1;
576 unsigned char c0, c1;
577
578 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
579 if (flags & AK4114_CHECK_NO_STAT)
580 goto __rate;
581 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
582 spin_lock_irqsave(&ak4114->lock, _flags);
583 if (rcs0 & AK4114_PAR)
584 ak4114->parity_errors++;
585 if (rcs1 & AK4114_V)
586 ak4114->v_bit_errors++;
587 if (rcs1 & AK4114_CCRC)
588 ak4114->ccrc_errors++;
589 if (rcs1 & AK4114_QCRC)
590 ak4114->qcrc_errors++;
591 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
592 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
593 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
594 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
595 ak4114->rcs1 = rcs1;
596 spin_unlock_irqrestore(&ak4114->lock, _flags);
597
598 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
599 if (ak4114->change_callback && (c0 | c1) != 0)
600 ak4114->change_callback(ak4114, c0, c1);
601
602 __rate:
603
604 res = external_rate(rcs1);
605 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
606 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
607 if (snd_pcm_running(ak4114->capture_substream)) {
608
609 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
610 res = 1;
611 }
612 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
613 }
614 return res;
615}
616EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
617
618static void ak4114_stats(struct work_struct *work)
619{
620 struct ak4114 *chip = container_of(work, struct ak4114, work.work);
621
622 if (atomic_inc_return(&chip->wq_processing) == 1)
623 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
624 if (atomic_dec_and_test(&chip->wq_processing))
625 schedule_delayed_work(&chip->work, HZ / 10);
626}
627
628#ifdef CONFIG_PM
629void snd_ak4114_suspend(struct ak4114 *chip)
630{
631 atomic_inc(&chip->wq_processing);
632 cancel_delayed_work_sync(&chip->work);
633}
634EXPORT_SYMBOL(snd_ak4114_suspend);
635
636void snd_ak4114_resume(struct ak4114 *chip)
637{
638 atomic_dec(&chip->wq_processing);
639 snd_ak4114_reinit(chip);
640}
641EXPORT_SYMBOL(snd_ak4114_resume);
642#endif
643
