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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
198 spin_lock_irq(&chip->lock);
199 ucontrol->value.integer.value[0] =
200 chip->errors[kcontrol->private_value];
201 chip->errors[kcontrol->private_value] = 0;
202 spin_unlock_irq(&chip->lock);
203 return 0;
204}
205
206#define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info
207
208static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
209 struct snd_ctl_elem_value *ucontrol)
210{
211 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
212 unsigned char reg = kcontrol->private_value & 0xff;
213 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
214 unsigned char inv = (kcontrol->private_value >> 31) & 1;
215
216 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
217 return 0;
218}
219
220static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
221 struct snd_ctl_elem_info *uinfo)
222{
223 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
224 uinfo->count = 1;
225 uinfo->value.integer.min = 0;
226 uinfo->value.integer.max = 192000;
227 return 0;
228}
229
230static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
231 struct snd_ctl_elem_value *ucontrol)
232{
233 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
234
235 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
236 return 0;
237}
238
239static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
240{
241 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
242 uinfo->count = 1;
243 return 0;
244}
245
246static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
247 struct snd_ctl_elem_value *ucontrol)
248{
249 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
250 unsigned i;
251
252 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
253 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
254 return 0;
255}
256
257static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
258 struct snd_ctl_elem_value *ucontrol)
259{
260 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
261 unsigned i;
262
263 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
264 ucontrol->value.iec958.status[i] = chip->txcsb[i];
265 return 0;
266}
267
268static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
269 struct snd_ctl_elem_value *ucontrol)
270{
271 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
272 unsigned i;
273
274 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
275 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
276 return 0;
277}
278
279static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
280{
281 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
282 uinfo->count = 1;
283 return 0;
284}
285
286static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
287 struct snd_ctl_elem_value *ucontrol)
288{
289 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
290 return 0;
291}
292
293static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
294{
295 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
296 uinfo->value.integer.min = 0;
297 uinfo->value.integer.max = 0xffff;
298 uinfo->count = 4;
299 return 0;
300}
301
302static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
303 struct snd_ctl_elem_value *ucontrol)
304{
305 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
306 unsigned short tmp;
307
308 ucontrol->value.integer.value[0] = 0xf8f2;
309 ucontrol->value.integer.value[1] = 0x4e1f;
310 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
311 ucontrol->value.integer.value[2] = tmp;
312 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
313 ucontrol->value.integer.value[3] = tmp;
314 return 0;
315}
316
317static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
318{
319 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
320 uinfo->count = AK4114_REG_QSUB_SIZE;
321 return 0;
322}
323
324static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
325 struct snd_ctl_elem_value *ucontrol)
326{
327 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
328 unsigned i;
329
330 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
331 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
332 return 0;
333}
334
335
336static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
337{
338 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
339 .name = "IEC958 Parity Errors",
340 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
341 .info = snd_ak4114_in_error_info,
342 .get = snd_ak4114_in_error_get,
343 .private_value = AK4114_PARITY_ERRORS,
344},
345{
346 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
347 .name = "IEC958 V-Bit Errors",
348 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
349 .info = snd_ak4114_in_error_info,
350 .get = snd_ak4114_in_error_get,
351 .private_value = AK4114_V_BIT_ERRORS,
352},
353{
354 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
355 .name = "IEC958 C-CRC Errors",
356 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
357 .info = snd_ak4114_in_error_info,
358 .get = snd_ak4114_in_error_get,
359 .private_value = AK4114_CCRC_ERRORS,
360},
361{
362 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
363 .name = "IEC958 Q-CRC Errors",
364 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
365 .info = snd_ak4114_in_error_info,
366 .get = snd_ak4114_in_error_get,
367 .private_value = AK4114_QCRC_ERRORS,
368},
369{
370 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
371 .name = "IEC958 External Rate",
372 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
373 .info = snd_ak4114_rate_info,
374 .get = snd_ak4114_rate_get,
375},
376{
377 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
378 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
379 .access = SNDRV_CTL_ELEM_ACCESS_READ,
380 .info = snd_ak4114_spdif_mask_info,
381 .get = snd_ak4114_spdif_mask_get,
382},
383{
384 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
385 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
386 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
387 .info = snd_ak4114_spdif_info,
388 .get = snd_ak4114_spdif_playback_get,
389 .put = snd_ak4114_spdif_playback_put,
390},
391{
392 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
393 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
394 .access = SNDRV_CTL_ELEM_ACCESS_READ,
395 .info = snd_ak4114_spdif_mask_info,
396 .get = snd_ak4114_spdif_mask_get,
397},
398{
399 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
400 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
401 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
402 .info = snd_ak4114_spdif_info,
403 .get = snd_ak4114_spdif_get,
404},
405{
406 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
407 .name = "IEC958 Preamble Capture Default",
408 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
409 .info = snd_ak4114_spdif_pinfo,
410 .get = snd_ak4114_spdif_pget,
411},
412{
413 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
414 .name = "IEC958 Q-subcode Capture Default",
415 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
416 .info = snd_ak4114_spdif_qinfo,
417 .get = snd_ak4114_spdif_qget,
418},
419{
420 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
421 .name = "IEC958 Audio",
422 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
423 .info = snd_ak4114_in_bit_info,
424 .get = snd_ak4114_in_bit_get,
425 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
426},
427{
428 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
429 .name = "IEC958 Non-PCM Bitstream",
430 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
431 .info = snd_ak4114_in_bit_info,
432 .get = snd_ak4114_in_bit_get,
433 .private_value = (6<<8) | AK4114_REG_RCS0,
434},
435{
436 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
437 .name = "IEC958 DTS Bitstream",
438 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
439 .info = snd_ak4114_in_bit_info,
440 .get = snd_ak4114_in_bit_get,
441 .private_value = (3<<8) | AK4114_REG_RCS0,
442},
443{
444 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
445 .name = "IEC958 PPL Lock Status",
446 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
447 .info = snd_ak4114_in_bit_info,
448 .get = snd_ak4114_in_bit_get,
449 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
450}
451};
452
453
454static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
455 struct snd_info_buffer *buffer)
456{
457 struct ak4114 *ak4114 = entry->private_data;
458 int reg, val;
459
460 for (reg = 0; reg < 0x20; reg++) {
461 val = reg_read(ak4114, reg);
462 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
463 }
464}
465
466static void snd_ak4114_proc_init(struct ak4114 *ak4114)
467{
468 struct snd_info_entry *entry;
469 if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
470 snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
471}
472
473int snd_ak4114_build(struct ak4114 *ak4114,
474 struct snd_pcm_substream *ply_substream,
475 struct snd_pcm_substream *cap_substream)
476{
477 struct snd_kcontrol *kctl;
478 unsigned int idx;
479 int err;
480
481 if (snd_BUG_ON(!cap_substream))
482 return -EINVAL;
483 ak4114->playback_substream = ply_substream;
484 ak4114->capture_substream = cap_substream;
485 for (idx = 0; idx < AK4114_CONTROLS; idx++) {
486 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
487 if (kctl == NULL)
488 return -ENOMEM;
489 if (strstr(kctl->id.name, "Playback")) {
490 if (ply_substream == NULL) {
491 snd_ctl_free_one(kctl);
492 ak4114->kctls[idx] = NULL;
493 continue;
494 }
495 kctl->id.device = ply_substream->pcm->device;
496 kctl->id.subdevice = ply_substream->number;
497 } else {
498 kctl->id.device = cap_substream->pcm->device;
499 kctl->id.subdevice = cap_substream->number;
500 }
501 err = snd_ctl_add(ak4114->card, kctl);
502 if (err < 0)
503 return err;
504 ak4114->kctls[idx] = kctl;
505 }
506 snd_ak4114_proc_init(ak4114);
507
508 schedule_delayed_work(&ak4114->work, HZ / 10);
509 return 0;
510}
511EXPORT_SYMBOL(snd_ak4114_build);
512
513
514static void ak4114_notify(struct ak4114 *ak4114,
515 unsigned char rcs0, unsigned char rcs1,
516 unsigned char c0, unsigned char c1)
517{
518 if (!ak4114->kctls[0])
519 return;
520
521 if (rcs0 & AK4114_PAR)
522 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
523 &ak4114->kctls[0]->id);
524 if (rcs0 & AK4114_V)
525 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
526 &ak4114->kctls[1]->id);
527 if (rcs1 & AK4114_CCRC)
528 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
529 &ak4114->kctls[2]->id);
530 if (rcs1 & AK4114_QCRC)
531 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
532 &ak4114->kctls[3]->id);
533
534
535 if (c1 & 0xf0)
536 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
537 &ak4114->kctls[4]->id);
538
539 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
540 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
541 &ak4114->kctls[9]->id);
542 if (c0 & AK4114_QINT)
543 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
544 &ak4114->kctls[10]->id);
545
546 if (c0 & AK4114_AUDION)
547 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
548 &ak4114->kctls[11]->id);
549 if (c0 & AK4114_AUTO)
550 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
551 &ak4114->kctls[12]->id);
552 if (c0 & AK4114_DTSCD)
553 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
554 &ak4114->kctls[13]->id);
555 if (c0 & AK4114_UNLCK)
556 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
557 &ak4114->kctls[14]->id);
558}
559
560int snd_ak4114_external_rate(struct ak4114 *ak4114)
561{
562 unsigned char rcs1;
563
564 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
565 return external_rate(rcs1);
566}
567EXPORT_SYMBOL(snd_ak4114_external_rate);
568
569int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
570{
571 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
572 unsigned long _flags;
573 int res = 0;
574 unsigned char rcs0, rcs1;
575 unsigned char c0, c1;
576
577 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
578 if (flags & AK4114_CHECK_NO_STAT)
579 goto __rate;
580 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
581 spin_lock_irqsave(&ak4114->lock, _flags);
582 if (rcs0 & AK4114_PAR)
583 ak4114->errors[AK4114_PARITY_ERRORS]++;
584 if (rcs1 & AK4114_V)
585 ak4114->errors[AK4114_V_BIT_ERRORS]++;
586 if (rcs1 & AK4114_CCRC)
587 ak4114->errors[AK4114_CCRC_ERRORS]++;
588 if (rcs1 & AK4114_QCRC)
589 ak4114->errors[AK4114_QCRC_ERRORS]++;
590 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
591 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
592 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
593 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
594 ak4114->rcs1 = rcs1;
595 spin_unlock_irqrestore(&ak4114->lock, _flags);
596
597 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
598 if (ak4114->change_callback && (c0 | c1) != 0)
599 ak4114->change_callback(ak4114, c0, c1);
600
601 __rate:
602
603 res = external_rate(rcs1);
604 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
605 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
606 if (snd_pcm_running(ak4114->capture_substream)) {
607
608 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
609 res = 1;
610 }
611 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
612 }
613 return res;
614}
615EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
616
617static void ak4114_stats(struct work_struct *work)
618{
619 struct ak4114 *chip = container_of(work, struct ak4114, work.work);
620
621 if (atomic_inc_return(&chip->wq_processing) == 1)
622 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
623 if (atomic_dec_and_test(&chip->wq_processing))
624 schedule_delayed_work(&chip->work, HZ / 10);
625}
626
627#ifdef CONFIG_PM
628void snd_ak4114_suspend(struct ak4114 *chip)
629{
630 atomic_inc(&chip->wq_processing);
631 cancel_delayed_work_sync(&chip->work);
632}
633EXPORT_SYMBOL(snd_ak4114_suspend);
634
635void snd_ak4114_resume(struct ak4114 *chip)
636{
637 atomic_dec(&chip->wq_processing);
638 snd_ak4114_reinit(chip);
639}
640EXPORT_SYMBOL(snd_ak4114_resume);
641#endif
642
