1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Routines for control of the AK4114 via I2C and 4-wire serial interface
4 * IEC958 (S/PDIF) receiver by Asahi Kasei
5 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 */
7
8 #include <linux/slab.h>
9 #include <linux/delay.h>
10 #include <linux/module.h>
11 #include <sound/core.h>
12 #include <sound/control.h>
13 #include <sound/pcm.h>
14 #include <sound/ak4114.h>
15 #include <sound/asoundef.h>
16 #include <sound/info.h>
17
18 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
19 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
20 MODULE_LICENSE("GPL");
21
22 #define AK4114_ADDR 0x00 /* fixed address */
23
24 static void ak4114_stats(struct work_struct *work);
25 static void ak4114_init_regs(struct ak4114 *chip);
26
27 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
28 {
29 ak4114->write(ak4114->private_data, reg, val);
30 if (reg <= AK4114_REG_INT1_MASK)
31 ak4114->regmap[reg] = val;
32 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
33 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
34 }
35
36 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
37 {
38 return ak4114->read(ak4114->private_data, reg);
39 }
40
41 #if 0
42 static void reg_dump(struct ak4114 *ak4114)
43 {
44 int i;
45
46 printk(KERN_DEBUG "AK4114 REG DUMP:\n");
47 for (i = 0; i < 0x20; i++)
48 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0);
49 }
50 #endif
51
52 static void snd_ak4114_free(struct ak4114 *chip)
53 {
54 atomic_inc(&chip->wq_processing); /* don't schedule new work */
55 cancel_delayed_work_sync(&chip->work);
56 kfree(chip);
57 }
58
59 static int snd_ak4114_dev_free(struct snd_device *device)
60 {
61 struct ak4114 *chip = device->device_data;
62 snd_ak4114_free(chip);
63 return 0;
64 }
65
66 int snd_ak4114_create(struct snd_card *card,
67 ak4114_read_t *read, ak4114_write_t *write,
68 const unsigned char pgm[6], const unsigned char txcsb[5],
69 void *private_data, struct ak4114 **r_ak4114)
70 {
71 struct ak4114 *chip;
72 int err = 0;
73 unsigned char reg;
74 static const struct snd_device_ops ops = {
75 .dev_free = snd_ak4114_dev_free,
76 };
77
78 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
79 if (chip == NULL)
80 return -ENOMEM;
81 spin_lock_init(&chip->lock);
82 chip->card = card;
83 chip->read = read;
84 chip->write = write;
85 chip->private_data = private_data;
86 INIT_DELAYED_WORK(&chip->work, ak4114_stats);
87 atomic_set(&chip->wq_processing, 0);
88 mutex_init(&chip->reinit_mutex);
89
90 for (reg = 0; reg < 6; reg++)
91 chip->regmap[reg] = pgm[reg];
92 for (reg = 0; reg < 5; reg++)
93 chip->txcsb[reg] = txcsb[reg];
94
95 ak4114_init_regs(chip);
96
97 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
98 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
99
100 err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
101 if (err < 0)
102 goto __fail;
103
104 if (r_ak4114)
105 *r_ak4114 = chip;
106 return 0;
107
108 __fail:
109 snd_ak4114_free(chip);
110 return err;
111 }
112 EXPORT_SYMBOL(snd_ak4114_create);
113
114 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
115 {
116 if (reg <= AK4114_REG_INT1_MASK)
117 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
118 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
119 reg_write(chip, reg,
120 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
121 }
122 EXPORT_SYMBOL(snd_ak4114_reg_write);
123
124 static void ak4114_init_regs(struct ak4114 *chip)
125 {
126 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
127
128 /* bring the chip to reset state and powerdown state */
129 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
130 udelay(200);
131 /* release reset, but leave powerdown */
132 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
133 udelay(200);
134 for (reg = 1; reg < 6; reg++)
135 reg_write(chip, reg, chip->regmap[reg]);
136 for (reg = 0; reg < 5; reg++)
137 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
138 /* release powerdown, everything is initialized now */
139 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
140 }
141
142 void snd_ak4114_reinit(struct ak4114 *chip)
143 {
144 if (atomic_inc_return(&chip->wq_processing) == 1)
145 cancel_delayed_work_sync(&chip->work);
146 mutex_lock(&chip->reinit_mutex);
147 ak4114_init_regs(chip);
148 mutex_unlock(&chip->reinit_mutex);
149 /* bring up statistics / event queing */
150 if (atomic_dec_and_test(&chip->wq_processing))
151 schedule_delayed_work(&chip->work, HZ / 10);
152 }
153 EXPORT_SYMBOL(snd_ak4114_reinit);
154
155 static unsigned int external_rate(unsigned char rcs1)
156 {
157 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
158 case AK4114_FS_32000HZ: return 32000;
159 case AK4114_FS_44100HZ: return 44100;
160 case AK4114_FS_48000HZ: return 48000;
161 case AK4114_FS_88200HZ: return 88200;
162 case AK4114_FS_96000HZ: return 96000;
163 case AK4114_FS_176400HZ: return 176400;
164 case AK4114_FS_192000HZ: return 192000;
165 default: return 0;
166 }
167 }
168
169 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
170 struct snd_ctl_elem_info *uinfo)
171 {
172 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
173 uinfo->count = 1;
174 uinfo->value.integer.min = 0;
175 uinfo->value.integer.max = LONG_MAX;
176 return 0;
177 }
178
179 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
180 struct snd_ctl_elem_value *ucontrol)
181 {
182 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
183
184 spin_lock_irq(&chip->lock);
185 ucontrol->value.integer.value[0] =
186 chip->errors[kcontrol->private_value];
187 chip->errors[kcontrol->private_value] = 0;
188 spin_unlock_irq(&chip->lock);
189 return 0;
190 }
191
192 #define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info
193
194 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
195 struct snd_ctl_elem_value *ucontrol)
196 {
197 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
198 unsigned char reg = kcontrol->private_value & 0xff;
199 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
200 unsigned char inv = (kcontrol->private_value >> 31) & 1;
201
202 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
203 return 0;
204 }
205
206 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
207 struct snd_ctl_elem_info *uinfo)
208 {
209 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
210 uinfo->count = 1;
211 uinfo->value.integer.min = 0;
212 uinfo->value.integer.max = 192000;
213 return 0;
214 }
215
216 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
217 struct snd_ctl_elem_value *ucontrol)
218 {
219 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
220
221 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
222 return 0;
223 }
224
225 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
226 {
227 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
228 uinfo->count = 1;
229 return 0;
230 }
231
232 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
233 struct snd_ctl_elem_value *ucontrol)
234 {
235 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
236 unsigned i;
237
238 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
239 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
240 return 0;
241 }
242
243 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
244 struct snd_ctl_elem_value *ucontrol)
245 {
246 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
247 unsigned i;
248
249 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
250 ucontrol->value.iec958.status[i] = chip->txcsb[i];
251 return 0;
252 }
253
254 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
255 struct snd_ctl_elem_value *ucontrol)
256 {
257 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
258 unsigned i;
259
260 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
261 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
262 return 0;
263 }
264
265 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
266 {
267 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
268 uinfo->count = 1;
269 return 0;
270 }
271
272 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
273 struct snd_ctl_elem_value *ucontrol)
274 {
275 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
276 return 0;
277 }
278
279 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
280 {
281 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
282 uinfo->value.integer.min = 0;
283 uinfo->value.integer.max = 0xffff;
284 uinfo->count = 4;
285 return 0;
286 }
287
288 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
289 struct snd_ctl_elem_value *ucontrol)
290 {
291 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
292 unsigned short tmp;
293
294 ucontrol->value.integer.value[0] = 0xf8f2;
295 ucontrol->value.integer.value[1] = 0x4e1f;
296 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
297 ucontrol->value.integer.value[2] = tmp;
298 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
299 ucontrol->value.integer.value[3] = tmp;
300 return 0;
301 }
302
303 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
304 {
305 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
306 uinfo->count = AK4114_REG_QSUB_SIZE;
307 return 0;
308 }
309
310 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
311 struct snd_ctl_elem_value *ucontrol)
312 {
313 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
314 unsigned i;
315
316 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
317 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
318 return 0;
319 }
320
321 /* Don't forget to change AK4114_CONTROLS define!!! */
322 static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
323 {
324 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
325 .name = "IEC958 Parity Errors",
326 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
327 .info = snd_ak4114_in_error_info,
328 .get = snd_ak4114_in_error_get,
329 .private_value = AK4114_PARITY_ERRORS,
330 },
331 {
332 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
333 .name = "IEC958 V-Bit Errors",
334 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
335 .info = snd_ak4114_in_error_info,
336 .get = snd_ak4114_in_error_get,
337 .private_value = AK4114_V_BIT_ERRORS,
338 },
339 {
340 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
341 .name = "IEC958 C-CRC Errors",
342 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
343 .info = snd_ak4114_in_error_info,
344 .get = snd_ak4114_in_error_get,
345 .private_value = AK4114_CCRC_ERRORS,
346 },
347 {
348 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
349 .name = "IEC958 Q-CRC Errors",
350 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
351 .info = snd_ak4114_in_error_info,
352 .get = snd_ak4114_in_error_get,
353 .private_value = AK4114_QCRC_ERRORS,
354 },
355 {
356 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
357 .name = "IEC958 External Rate",
358 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
359 .info = snd_ak4114_rate_info,
360 .get = snd_ak4114_rate_get,
361 },
362 {
363 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
364 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
365 .access = SNDRV_CTL_ELEM_ACCESS_READ,
366 .info = snd_ak4114_spdif_mask_info,
367 .get = snd_ak4114_spdif_mask_get,
368 },
369 {
370 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
371 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
372 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
373 .info = snd_ak4114_spdif_info,
374 .get = snd_ak4114_spdif_playback_get,
375 .put = snd_ak4114_spdif_playback_put,
376 },
377 {
378 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
379 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,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("",CAPTURE,DEFAULT),
387 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
388 .info = snd_ak4114_spdif_info,
389 .get = snd_ak4114_spdif_get,
390 },
391 {
392 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
393 .name = "IEC958 Preamble Capture Default",
394 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
395 .info = snd_ak4114_spdif_pinfo,
396 .get = snd_ak4114_spdif_pget,
397 },
398 {
399 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
400 .name = "IEC958 Q-subcode Capture Default",
401 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
402 .info = snd_ak4114_spdif_qinfo,
403 .get = snd_ak4114_spdif_qget,
404 },
405 {
406 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
407 .name = "IEC958 Audio",
408 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
409 .info = snd_ak4114_in_bit_info,
410 .get = snd_ak4114_in_bit_get,
411 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
412 },
413 {
414 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
415 .name = "IEC958 Non-PCM Bitstream",
416 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
417 .info = snd_ak4114_in_bit_info,
418 .get = snd_ak4114_in_bit_get,
419 .private_value = (6<<8) | AK4114_REG_RCS0,
420 },
421 {
422 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
423 .name = "IEC958 DTS Bitstream",
424 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
425 .info = snd_ak4114_in_bit_info,
426 .get = snd_ak4114_in_bit_get,
427 .private_value = (3<<8) | AK4114_REG_RCS0,
428 },
429 {
430 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
431 .name = "IEC958 PPL Lock Status",
432 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
433 .info = snd_ak4114_in_bit_info,
434 .get = snd_ak4114_in_bit_get,
435 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
436 }
437 };
438
439
440 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
441 struct snd_info_buffer *buffer)
442 {
443 struct ak4114 *ak4114 = entry->private_data;
444 int reg, val;
445 /* all ak4114 registers 0x00 - 0x1f */
446 for (reg = 0; reg < 0x20; reg++) {
447 val = reg_read(ak4114, reg);
448 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
449 }
450 }
451
452 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
453 {
454 snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
455 snd_ak4114_proc_regs_read);
456 }
457
458 int snd_ak4114_build(struct ak4114 *ak4114,
459 struct snd_pcm_substream *ply_substream,
460 struct snd_pcm_substream *cap_substream)
461 {
462 struct snd_kcontrol *kctl;
463 unsigned int idx;
464 int err;
465
466 if (snd_BUG_ON(!cap_substream))
467 return -EINVAL;
468 ak4114->playback_substream = ply_substream;
469 ak4114->capture_substream = cap_substream;
470 for (idx = 0; idx < AK4114_CONTROLS; idx++) {
471 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
472 if (kctl == NULL)
473 return -ENOMEM;
474 if (strstr(kctl->id.name, "Playback")) {
475 if (ply_substream == NULL) {
476 snd_ctl_free_one(kctl);
477 ak4114->kctls[idx] = NULL;
478 continue;
479 }
480 kctl->id.device = ply_substream->pcm->device;
481 kctl->id.subdevice = ply_substream->number;
482 } else {
483 kctl->id.device = cap_substream->pcm->device;
484 kctl->id.subdevice = cap_substream->number;
485 }
486 err = snd_ctl_add(ak4114->card, kctl);
487 if (err < 0)
488 return err;
489 ak4114->kctls[idx] = kctl;
490 }
491 snd_ak4114_proc_init(ak4114);
492 /* trigger workq */
493 schedule_delayed_work(&ak4114->work, HZ / 10);
494 return 0;
495 }
496 EXPORT_SYMBOL(snd_ak4114_build);
497
498 /* notify kcontrols if any parameters are changed */
499 static void ak4114_notify(struct ak4114 *ak4114,
500 unsigned char rcs0, unsigned char rcs1,
501 unsigned char c0, unsigned char c1)
502 {
503 if (!ak4114->kctls[0])
504 return;
505
506 if (rcs0 & AK4114_PAR)
507 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
508 &ak4114->kctls[0]->id);
509 if (rcs0 & AK4114_V)
510 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
511 &ak4114->kctls[1]->id);
512 if (rcs1 & AK4114_CCRC)
513 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
514 &ak4114->kctls[2]->id);
515 if (rcs1 & AK4114_QCRC)
516 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
517 &ak4114->kctls[3]->id);
518
519 /* rate change */
520 if (c1 & 0xf0)
521 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
522 &ak4114->kctls[4]->id);
523
524 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
525 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
526 &ak4114->kctls[9]->id);
527 if (c0 & AK4114_QINT)
528 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
529 &ak4114->kctls[10]->id);
530
531 if (c0 & AK4114_AUDION)
532 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
533 &ak4114->kctls[11]->id);
534 if (c0 & AK4114_AUTO)
535 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
536 &ak4114->kctls[12]->id);
537 if (c0 & AK4114_DTSCD)
538 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
539 &ak4114->kctls[13]->id);
540 if (c0 & AK4114_UNLCK)
541 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
542 &ak4114->kctls[14]->id);
543 }
544
545 int snd_ak4114_external_rate(struct ak4114 *ak4114)
546 {
547 unsigned char rcs1;
548
549 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
550 return external_rate(rcs1);
551 }
552 EXPORT_SYMBOL(snd_ak4114_external_rate);
553
554 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
555 {
556 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
557 unsigned long _flags;
558 int res = 0;
559 unsigned char rcs0, rcs1;
560 unsigned char c0, c1;
561
562 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
563 if (flags & AK4114_CHECK_NO_STAT)
564 goto __rate;
565 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
566 spin_lock_irqsave(&ak4114->lock, _flags);
567 if (rcs0 & AK4114_PAR)
568 ak4114->errors[AK4114_PARITY_ERRORS]++;
569 if (rcs1 & AK4114_V)
570 ak4114->errors[AK4114_V_BIT_ERRORS]++;
571 if (rcs1 & AK4114_CCRC)
572 ak4114->errors[AK4114_CCRC_ERRORS]++;
573 if (rcs1 & AK4114_QCRC)
574 ak4114->errors[AK4114_QCRC_ERRORS]++;
575 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
576 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
577 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
578 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
579 ak4114->rcs1 = rcs1;
580 spin_unlock_irqrestore(&ak4114->lock, _flags);
581
582 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
583 if (ak4114->change_callback && (c0 | c1) != 0)
584 ak4114->change_callback(ak4114, c0, c1);
585
586 __rate:
587 /* compare rate */
588 res = external_rate(rcs1);
589 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
590 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
591 if (snd_pcm_running(ak4114->capture_substream)) {
592 // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
593 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
594 res = 1;
595 }
596 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
597 }
598 return res;
599 }
600 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
601
602 static void ak4114_stats(struct work_struct *work)
603 {
604 struct ak4114 *chip = container_of(work, struct ak4114, work.work);
605
606 if (atomic_inc_return(&chip->wq_processing) == 1)
607 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
608 if (atomic_dec_and_test(&chip->wq_processing))
609 schedule_delayed_work(&chip->work, HZ / 10);
610 }
611
612 #ifdef CONFIG_PM
613 void snd_ak4114_suspend(struct ak4114 *chip)
614 {
615 atomic_inc(&chip->wq_processing); /* don't schedule new work */
616 cancel_delayed_work_sync(&chip->work);
617 }
618 EXPORT_SYMBOL(snd_ak4114_suspend);
619
620 void snd_ak4114_resume(struct ak4114 *chip)
621 {
622 atomic_dec(&chip->wq_processing);
623 snd_ak4114_reinit(chip);
624 }
625 EXPORT_SYMBOL(snd_ak4114_resume);
626 #endif
627
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