sound/i2c/other/ak4114.c

   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