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

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  1 /*
  2  *  Routines for control of the AK4114 via I2C and 4-wire serial interface
  3  *  IEC958 (S/PDIF) receiver by Asahi Kasei
  4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  5  *
  6  *
  7  *   This program is free software; you can redistribute it and/or modify
  8  *   it under the terms of the GNU General Public License as published by
  9  *   the Free Software Foundation; either version 2 of the License, or
 10  *   (at your option) any later version.
 11  *
 12  *   This program is distributed in the hope that it will be useful,
 13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  *   GNU General Public License for more details.
 16  *
 17  *   You should have received a copy of the GNU General Public License
 18  *   along with this program; if not, write to the Free Software
 19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 20  *
 21  */
 22 
 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 
 33 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 34 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
 35 MODULE_LICENSE("GPL");
 36 
 37 #define AK4114_ADDR                     0x00 /* fixed address */
 38 
 39 static void ak4114_stats(struct work_struct *work);
 40 static void ak4114_init_regs(struct ak4114 *chip);
 41 
 42 static 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 
 51 static 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
 57 static 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 
 67 static void snd_ak4114_free(struct ak4114 *chip)
 68 {
 69         atomic_inc(&chip->wq_processing);       /* don't schedule new work */
 70         cancel_delayed_work_sync(&chip->work);
 71         kfree(chip);
 72 }
 73 
 74 static 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 
 81 int 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 < 0 ? err : -EIO;
125 }
126 EXPORT_SYMBOL(snd_ak4114_create);
127 
128 void 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 }
136 EXPORT_SYMBOL(snd_ak4114_reg_write);
137 
138 static void ak4114_init_regs(struct ak4114 *chip)
139 {
140         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
141 
142         /* bring the chip to reset state and powerdown state */
143         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
144         udelay(200);
145         /* release reset, but leave powerdown */
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         /* release powerdown, everything is initialized now */
153         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
154 }
155 
156 void 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         /* bring up statistics / event queing */
164         if (atomic_dec_and_test(&chip->wq_processing))
165                 schedule_delayed_work(&chip->work, HZ / 10);
166 }
167 EXPORT_SYMBOL(snd_ak4114_reinit);
168 
169 static 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 
183 static 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 
193 static 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 
209 static 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 
221 static 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 
231 static 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 
240 static 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 
247 static 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 
258 static 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 
269 static 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 
280 static 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 
287 static 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 
294 static 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 
303 static 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 
318 static 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 
325 static 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 /* Don't forget to change AK4114_CONTROLS define!!! */
337 static 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 
455 static 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         /* all ak4114 registers 0x00 - 0x1f */
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 
467 static 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 
474 int 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         /* trigger workq */
509         schedule_delayed_work(&ak4114->work, HZ / 10);
510         return 0;
511 }
512 EXPORT_SYMBOL(snd_ak4114_build);
513 
514 /* notify kcontrols if any parameters are changed */
515 static 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         /* rate change */
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 
561 int 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 }
568 EXPORT_SYMBOL(snd_ak4114_external_rate);
569 
570 int 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         /* compare rate */
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                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
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 }
616 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
617 
618 static 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
629 void snd_ak4114_suspend(struct ak4114 *chip)
630 {
631         atomic_inc(&chip->wq_processing); /* don't schedule new work */
632         cancel_delayed_work_sync(&chip->work);
633 }
634 EXPORT_SYMBOL(snd_ak4114_suspend);
635 
636 void snd_ak4114_resume(struct ak4114 *chip)
637 {
638         atomic_dec(&chip->wq_processing);
639         snd_ak4114_reinit(chip);
640 }
641 EXPORT_SYMBOL(snd_ak4114_resume);
642 #endif
643 

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