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TOMOYO Linux Cross Reference
Linux/sound/i2c/other/ak4114.c

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  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 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         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
101                 goto __fail;
102 
103         if (r_ak4114)
104                 *r_ak4114 = chip;
105         return 0;
106 
107       __fail:
108         snd_ak4114_free(chip);
109         return err;
110 }
111 EXPORT_SYMBOL(snd_ak4114_create);
112 
113 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
114 {
115         if (reg <= AK4114_REG_INT1_MASK)
116                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
117         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
118                 reg_write(chip, reg,
119                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
120 }
121 EXPORT_SYMBOL(snd_ak4114_reg_write);
122 
123 static void ak4114_init_regs(struct ak4114 *chip)
124 {
125         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
126 
127         /* bring the chip to reset state and powerdown state */
128         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
129         udelay(200);
130         /* release reset, but leave powerdown */
131         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
132         udelay(200);
133         for (reg = 1; reg < 6; reg++)
134                 reg_write(chip, reg, chip->regmap[reg]);
135         for (reg = 0; reg < 5; reg++)
136                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
137         /* release powerdown, everything is initialized now */
138         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
139 }
140 
141 void snd_ak4114_reinit(struct ak4114 *chip)
142 {
143         if (atomic_inc_return(&chip->wq_processing) == 1)
144                 cancel_delayed_work_sync(&chip->work);
145         mutex_lock(&chip->reinit_mutex);
146         ak4114_init_regs(chip);
147         mutex_unlock(&chip->reinit_mutex);
148         /* bring up statistics / event queing */
149         if (atomic_dec_and_test(&chip->wq_processing))
150                 schedule_delayed_work(&chip->work, HZ / 10);
151 }
152 EXPORT_SYMBOL(snd_ak4114_reinit);
153 
154 static unsigned int external_rate(unsigned char rcs1)
155 {
156         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
157         case AK4114_FS_32000HZ: return 32000;
158         case AK4114_FS_44100HZ: return 44100;
159         case AK4114_FS_48000HZ: return 48000;
160         case AK4114_FS_88200HZ: return 88200;
161         case AK4114_FS_96000HZ: return 96000;
162         case AK4114_FS_176400HZ: return 176400;
163         case AK4114_FS_192000HZ: return 192000;
164         default:                return 0;
165         }
166 }
167 
168 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
169                                     struct snd_ctl_elem_info *uinfo)
170 {
171         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
172         uinfo->count = 1;
173         uinfo->value.integer.min = 0;
174         uinfo->value.integer.max = LONG_MAX;
175         return 0;
176 }
177 
178 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
179                                    struct snd_ctl_elem_value *ucontrol)
180 {
181         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
182 
183         spin_lock_irq(&chip->lock);
184         ucontrol->value.integer.value[0] =
185                 chip->errors[kcontrol->private_value];
186         chip->errors[kcontrol->private_value] = 0;
187         spin_unlock_irq(&chip->lock);
188         return 0;
189 }
190 
191 #define snd_ak4114_in_bit_info          snd_ctl_boolean_mono_info
192 
193 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
194                                  struct snd_ctl_elem_value *ucontrol)
195 {
196         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
197         unsigned char reg = kcontrol->private_value & 0xff;
198         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
199         unsigned char inv = (kcontrol->private_value >> 31) & 1;
200 
201         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
202         return 0;
203 }
204 
205 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
206                                 struct snd_ctl_elem_info *uinfo)
207 {
208         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
209         uinfo->count = 1;
210         uinfo->value.integer.min = 0;
211         uinfo->value.integer.max = 192000;
212         return 0;
213 }
214 
215 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
216                                struct snd_ctl_elem_value *ucontrol)
217 {
218         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
219 
220         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
221         return 0;
222 }
223 
224 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
225 {
226         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
227         uinfo->count = 1;
228         return 0;
229 }
230 
231 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
232                                 struct snd_ctl_elem_value *ucontrol)
233 {
234         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
235         unsigned i;
236 
237         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
238                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
239         return 0;
240 }
241 
242 static int snd_ak4114_spdif_playback_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_TXCSB_SIZE; i++)
249                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
250         return 0;
251 }
252 
253 static int snd_ak4114_spdif_playback_put(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                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
261         return 0;
262 }
263 
264 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
265 {
266         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
267         uinfo->count = 1;
268         return 0;
269 }
270 
271 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
272                                       struct snd_ctl_elem_value *ucontrol)
273 {
274         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
275         return 0;
276 }
277 
278 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
279 {
280         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
281         uinfo->value.integer.min = 0;
282         uinfo->value.integer.max = 0xffff;
283         uinfo->count = 4;
284         return 0;
285 }
286 
287 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
288                                  struct snd_ctl_elem_value *ucontrol)
289 {
290         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
291         unsigned short tmp;
292 
293         ucontrol->value.integer.value[0] = 0xf8f2;
294         ucontrol->value.integer.value[1] = 0x4e1f;
295         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
296         ucontrol->value.integer.value[2] = tmp;
297         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
298         ucontrol->value.integer.value[3] = tmp;
299         return 0;
300 }
301 
302 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
303 {
304         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
305         uinfo->count = AK4114_REG_QSUB_SIZE;
306         return 0;
307 }
308 
309 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
310                                  struct snd_ctl_elem_value *ucontrol)
311 {
312         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
313         unsigned i;
314 
315         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
316                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
317         return 0;
318 }
319 
320 /* Don't forget to change AK4114_CONTROLS define!!! */
321 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
322 {
323         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
324         .name =         "IEC958 Parity Errors",
325         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
326         .info =         snd_ak4114_in_error_info,
327         .get =          snd_ak4114_in_error_get,
328         .private_value = AK4114_PARITY_ERRORS,
329 },
330 {
331         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
332         .name =         "IEC958 V-Bit Errors",
333         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
334         .info =         snd_ak4114_in_error_info,
335         .get =          snd_ak4114_in_error_get,
336         .private_value = AK4114_V_BIT_ERRORS,
337 },
338 {
339         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
340         .name =         "IEC958 C-CRC 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 = AK4114_CCRC_ERRORS,
345 },
346 {
347         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
348         .name =         "IEC958 Q-CRC 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 = AK4114_QCRC_ERRORS,
353 },
354 {
355         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
356         .name =         "IEC958 External Rate",
357         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
358         .info =         snd_ak4114_rate_info,
359         .get =          snd_ak4114_rate_get,
360 },
361 {
362         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
363         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
364         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
365         .info =         snd_ak4114_spdif_mask_info,
366         .get =          snd_ak4114_spdif_mask_get,
367 },
368 {
369         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
370         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
371         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
372         .info =         snd_ak4114_spdif_info,
373         .get =          snd_ak4114_spdif_playback_get,
374         .put =          snd_ak4114_spdif_playback_put,
375 },
376 {
377         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
378         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,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("",CAPTURE,DEFAULT),
386         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
387         .info =         snd_ak4114_spdif_info,
388         .get =          snd_ak4114_spdif_get,
389 },
390 {
391         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
392         .name =         "IEC958 Preamble Capture Default",
393         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
394         .info =         snd_ak4114_spdif_pinfo,
395         .get =          snd_ak4114_spdif_pget,
396 },
397 {
398         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
399         .name =         "IEC958 Q-subcode Capture Default",
400         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
401         .info =         snd_ak4114_spdif_qinfo,
402         .get =          snd_ak4114_spdif_qget,
403 },
404 {
405         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
406         .name =         "IEC958 Audio",
407         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
408         .info =         snd_ak4114_in_bit_info,
409         .get =          snd_ak4114_in_bit_get,
410         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
411 },
412 {
413         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
414         .name =         "IEC958 Non-PCM Bitstream",
415         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
416         .info =         snd_ak4114_in_bit_info,
417         .get =          snd_ak4114_in_bit_get,
418         .private_value = (6<<8) | AK4114_REG_RCS0,
419 },
420 {
421         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
422         .name =         "IEC958 DTS Bitstream",
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 = (3<<8) | AK4114_REG_RCS0,
427 },
428 {
429         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
430         .name =         "IEC958 PPL Lock Status",
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 = (1<<31) | (4<<8) | AK4114_REG_RCS0,
435 }
436 };
437 
438 
439 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
440                 struct snd_info_buffer *buffer)
441 {
442         struct ak4114 *ak4114 = entry->private_data;
443         int reg, val;
444         /* all ak4114 registers 0x00 - 0x1f */
445         for (reg = 0; reg < 0x20; reg++) {
446                 val = reg_read(ak4114, reg);
447                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
448         }
449 }
450 
451 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
452 {
453         snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
454                              snd_ak4114_proc_regs_read);
455 }
456 
457 int snd_ak4114_build(struct ak4114 *ak4114,
458                      struct snd_pcm_substream *ply_substream,
459                      struct snd_pcm_substream *cap_substream)
460 {
461         struct snd_kcontrol *kctl;
462         unsigned int idx;
463         int err;
464 
465         if (snd_BUG_ON(!cap_substream))
466                 return -EINVAL;
467         ak4114->playback_substream = ply_substream;
468         ak4114->capture_substream = cap_substream;
469         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
470                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
471                 if (kctl == NULL)
472                         return -ENOMEM;
473                 if (strstr(kctl->id.name, "Playback")) {
474                         if (ply_substream == NULL) {
475                                 snd_ctl_free_one(kctl);
476                                 ak4114->kctls[idx] = NULL;
477                                 continue;
478                         }
479                         kctl->id.device = ply_substream->pcm->device;
480                         kctl->id.subdevice = ply_substream->number;
481                 } else {
482                         kctl->id.device = cap_substream->pcm->device;
483                         kctl->id.subdevice = cap_substream->number;
484                 }
485                 err = snd_ctl_add(ak4114->card, kctl);
486                 if (err < 0)
487                         return err;
488                 ak4114->kctls[idx] = kctl;
489         }
490         snd_ak4114_proc_init(ak4114);
491         /* trigger workq */
492         schedule_delayed_work(&ak4114->work, HZ / 10);
493         return 0;
494 }
495 EXPORT_SYMBOL(snd_ak4114_build);
496 
497 /* notify kcontrols if any parameters are changed */
498 static void ak4114_notify(struct ak4114 *ak4114,
499                           unsigned char rcs0, unsigned char rcs1,
500                           unsigned char c0, unsigned char c1)
501 {
502         if (!ak4114->kctls[0])
503                 return;
504 
505         if (rcs0 & AK4114_PAR)
506                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
507                                &ak4114->kctls[0]->id);
508         if (rcs0 & AK4114_V)
509                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
510                                &ak4114->kctls[1]->id);
511         if (rcs1 & AK4114_CCRC)
512                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
513                                &ak4114->kctls[2]->id);
514         if (rcs1 & AK4114_QCRC)
515                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
516                                &ak4114->kctls[3]->id);
517 
518         /* rate change */
519         if (c1 & 0xf0)
520                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
521                                &ak4114->kctls[4]->id);
522 
523         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
524                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
525                                &ak4114->kctls[9]->id);
526         if (c0 & AK4114_QINT)
527                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
528                                &ak4114->kctls[10]->id);
529 
530         if (c0 & AK4114_AUDION)
531                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
532                                &ak4114->kctls[11]->id);
533         if (c0 & AK4114_AUTO)
534                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
535                                &ak4114->kctls[12]->id);
536         if (c0 & AK4114_DTSCD)
537                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
538                                &ak4114->kctls[13]->id);
539         if (c0 & AK4114_UNLCK)
540                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
541                                &ak4114->kctls[14]->id);
542 }
543 
544 int snd_ak4114_external_rate(struct ak4114 *ak4114)
545 {
546         unsigned char rcs1;
547 
548         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
549         return external_rate(rcs1);
550 }
551 EXPORT_SYMBOL(snd_ak4114_external_rate);
552 
553 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
554 {
555         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
556         unsigned long _flags;
557         int res = 0;
558         unsigned char rcs0, rcs1;
559         unsigned char c0, c1;
560 
561         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
562         if (flags & AK4114_CHECK_NO_STAT)
563                 goto __rate;
564         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
565         spin_lock_irqsave(&ak4114->lock, _flags);
566         if (rcs0 & AK4114_PAR)
567                 ak4114->errors[AK4114_PARITY_ERRORS]++;
568         if (rcs1 & AK4114_V)
569                 ak4114->errors[AK4114_V_BIT_ERRORS]++;
570         if (rcs1 & AK4114_CCRC)
571                 ak4114->errors[AK4114_CCRC_ERRORS]++;
572         if (rcs1 & AK4114_QCRC)
573                 ak4114->errors[AK4114_QCRC_ERRORS]++;
574         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
575                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
576         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
577         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
578         ak4114->rcs1 = rcs1;
579         spin_unlock_irqrestore(&ak4114->lock, _flags);
580 
581         ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
582         if (ak4114->change_callback && (c0 | c1) != 0)
583                 ak4114->change_callback(ak4114, c0, c1);
584 
585       __rate:
586         /* compare rate */
587         res = external_rate(rcs1);
588         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
589                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
590                 if (snd_pcm_running(ak4114->capture_substream)) {
591                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
592                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
593                         res = 1;
594                 }
595                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
596         }
597         return res;
598 }
599 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
600 
601 static void ak4114_stats(struct work_struct *work)
602 {
603         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
604 
605         if (atomic_inc_return(&chip->wq_processing) == 1)
606                 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
607         if (atomic_dec_and_test(&chip->wq_processing))
608                 schedule_delayed_work(&chip->work, HZ / 10);
609 }
610 
611 #ifdef CONFIG_PM
612 void snd_ak4114_suspend(struct ak4114 *chip)
613 {
614         atomic_inc(&chip->wq_processing); /* don't schedule new work */
615         cancel_delayed_work_sync(&chip->work);
616 }
617 EXPORT_SYMBOL(snd_ak4114_suspend);
618 
619 void snd_ak4114_resume(struct ak4114 *chip)
620 {
621         atomic_dec(&chip->wq_processing);
622         snd_ak4114_reinit(chip);
623 }
624 EXPORT_SYMBOL(snd_ak4114_resume);
625 #endif
626 

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