sound/i2c/other/ak4113.c

   1 /*
   2  *  Routines for control of the AK4113 via I2C/4-wire serial interface
   3  *  IEC958 (S/PDIF) receiver by Asahi Kasei
   4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   5  *  Copyright (c) by Pavel Hofman <pavel.hofman@ivitera.com>
   6  *
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/delay.h>
  26 #include <sound/core.h>
  27 #include <sound/control.h>
  28 #include <sound/pcm.h>
  29 #include <sound/ak4113.h>
  30 #include <sound/asoundef.h>
  31 #include <sound/info.h>
  32
  33 MODULE_AUTHOR("Pavel Hofman <pavel.hofman@ivitera.com>");
  34 MODULE_DESCRIPTION("AK4113 IEC958 (S/PDIF) receiver by Asahi Kasei");
  35 MODULE_LICENSE("GPL");
  36
  37 #define AK4113_ADDR                     0x00 /* fixed address */
  38
  39 static void ak4113_stats(struct work_struct *work);
  40 static void ak4113_init_regs(struct ak4113 *chip);
  41
  42
  43 static void reg_write(struct ak4113 *ak4113, unsigned char reg,
  44                 unsigned char val)
  45 {
  46         ak4113->write(ak4113->private_data, reg, val);
  47         if (reg < sizeof(ak4113->regmap))
  48                 ak4113->regmap[reg] = val;
  49 }
  50
  51 static inline unsigned char reg_read(struct ak4113 *ak4113, unsigned char reg)
  52 {
  53         return ak4113->read(ak4113->private_data, reg);
  54 }
  55
  56 static void snd_ak4113_free(struct ak4113 *chip)
  57 {
  58         chip->init = 1; /* don't schedule new work */
  59         mb();
  60         cancel_delayed_work_sync(&chip->work);
  61         kfree(chip);
  62 }
  63
  64 static int snd_ak4113_dev_free(struct snd_device *device)
  65 {
  66         struct ak4113 *chip = device->device_data;
  67         snd_ak4113_free(chip);
  68         return 0;
  69 }
  70
  71 int snd_ak4113_create(struct snd_card *card, ak4113_read_t *read,
  72                 ak4113_write_t *write, const unsigned char *pgm,
  73                 void *private_data, struct ak4113 **r_ak4113)
  74 {
  75         struct ak4113 *chip;
  76         int err = 0;
  77         unsigned char reg;
  78         static struct snd_device_ops ops = {
  79                 .dev_free =     snd_ak4113_dev_free,
  80         };
  81
  82         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  83         if (chip == NULL)
  84                 return -ENOMEM;
  85         spin_lock_init(&chip->lock);
  86         chip->card = card;
  87         chip->read = read;
  88         chip->write = write;
  89         chip->private_data = private_data;
  90         INIT_DELAYED_WORK(&chip->work, ak4113_stats);
  91
  92         for (reg = 0; reg < AK4113_WRITABLE_REGS ; reg++)
  93                 chip->regmap[reg] = pgm[reg];
  94         ak4113_init_regs(chip);
  95
  96         chip->rcs0 = reg_read(chip, AK4113_REG_RCS0) & ~(AK4113_QINT |
  97                         AK4113_CINT | AK4113_STC);
  98         chip->rcs1 = reg_read(chip, AK4113_REG_RCS1);
  99         chip->rcs2 = reg_read(chip, AK4113_REG_RCS2);
 100         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 101         if (err < 0)
 102                 goto __fail;
 103
 104         if (r_ak4113)
 105                 *r_ak4113 = chip;
 106         return 0;
 107
 108 __fail:
 109         snd_ak4113_free(chip);
 110         return err < 0 ? err : -EIO;
 111 }
 112 EXPORT_SYMBOL_GPL(snd_ak4113_create);
 113
 114 void snd_ak4113_reg_write(struct ak4113 *chip, unsigned char reg,
 115                 unsigned char mask, unsigned char val)
 116 {
 117         if (reg >= AK4113_WRITABLE_REGS)
 118                 return;
 119         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 120 }
 121 EXPORT_SYMBOL_GPL(snd_ak4113_reg_write);
 122
 123 static void ak4113_init_regs(struct ak4113 *chip)
 124 {
 125         unsigned char old = chip->regmap[AK4113_REG_PWRDN], reg;
 126
 127         /* bring the chip to reset state and powerdown state */
 128         reg_write(chip, AK4113_REG_PWRDN, old & ~(AK4113_RST|AK4113_PWN));
 129         udelay(200);
 130         /* release reset, but leave powerdown */
 131         reg_write(chip, AK4113_REG_PWRDN, (old | AK4113_RST) & ~AK4113_PWN);
 132         udelay(200);
 133         for (reg = 1; reg < AK4113_WRITABLE_REGS; reg++)
 134                 reg_write(chip, reg, chip->regmap[reg]);
 135         /* release powerdown, everything is initialized now */
 136         reg_write(chip, AK4113_REG_PWRDN, old | AK4113_RST | AK4113_PWN);
 137 }
 138
 139 void snd_ak4113_reinit(struct ak4113 *chip)
 140 {
 141         chip->init = 1;
 142         mb();
 143         flush_delayed_work_sync(&chip->work);
 144         ak4113_init_regs(chip);
 145         /* bring up statistics / event queing */
 146         chip->init = 0;
 147         if (chip->kctls[0])
 148                 schedule_delayed_work(&chip->work, HZ / 10);
 149 }
 150 EXPORT_SYMBOL_GPL(snd_ak4113_reinit);
 151
 152 static unsigned int external_rate(unsigned char rcs1)
 153 {
 154         switch (rcs1 & (AK4113_FS0|AK4113_FS1|AK4113_FS2|AK4113_FS3)) {
 155         case AK4113_FS_8000HZ:
 156                 return 8000;
 157         case AK4113_FS_11025HZ:
 158                 return 11025;
 159         case AK4113_FS_16000HZ:
 160                 return 16000;
 161         case AK4113_FS_22050HZ:
 162                 return 22050;
 163         case AK4113_FS_24000HZ:
 164                 return 24000;
 165         case AK4113_FS_32000HZ:
 166                 return 32000;
 167         case AK4113_FS_44100HZ:
 168                 return 44100;
 169         case AK4113_FS_48000HZ:
 170                 return 48000;
 171         case AK4113_FS_64000HZ:
 172                 return 64000;
 173         case AK4113_FS_88200HZ:
 174                 return 88200;
 175         case AK4113_FS_96000HZ:
 176                 return 96000;
 177         case AK4113_FS_176400HZ:
 178                 return 176400;
 179         case AK4113_FS_192000HZ:
 180                 return 192000;
 181         default:
 182                 return 0;
 183         }
 184 }
 185
 186 static int snd_ak4113_in_error_info(struct snd_kcontrol *kcontrol,
 187                                     struct snd_ctl_elem_info *uinfo)
 188 {
 189         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 190         uinfo->count = 1;
 191         uinfo->value.integer.min = 0;
 192         uinfo->value.integer.max = LONG_MAX;
 193         return 0;
 194 }
 195
 196 static int snd_ak4113_in_error_get(struct snd_kcontrol *kcontrol,
 197                                    struct snd_ctl_elem_value *ucontrol)
 198 {
 199         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 200         long *ptr;
 201
 202         spin_lock_irq(&chip->lock);
 203         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 204         ucontrol->value.integer.value[0] = *ptr;
 205         *ptr = 0;
 206         spin_unlock_irq(&chip->lock);
 207         return 0;
 208 }
 209
 210 #define snd_ak4113_in_bit_info          snd_ctl_boolean_mono_info
 211
 212 static int snd_ak4113_in_bit_get(struct snd_kcontrol *kcontrol,
 213                                  struct snd_ctl_elem_value *ucontrol)
 214 {
 215         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 216         unsigned char reg = kcontrol->private_value & 0xff;
 217         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 218         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 219
 220         ucontrol->value.integer.value[0] =
 221                 ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 222         return 0;
 223 }
 224
 225 static int snd_ak4113_rx_info(struct snd_kcontrol *kcontrol,
 226                               struct snd_ctl_elem_info *uinfo)
 227 {
 228         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 229         uinfo->count = 1;
 230         uinfo->value.integer.min = 0;
 231         uinfo->value.integer.max = 5;
 232         return 0;
 233 }
 234
 235 static int snd_ak4113_rx_get(struct snd_kcontrol *kcontrol,
 236                              struct snd_ctl_elem_value *ucontrol)
 237 {
 238         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 239
 240         ucontrol->value.integer.value[0] =
 241                 (AK4113_IPS(chip->regmap[AK4113_REG_IO1]));
 242         return 0;
 243 }
 244
 245 static int snd_ak4113_rx_put(struct snd_kcontrol *kcontrol,
 246                              struct snd_ctl_elem_value *ucontrol)
 247 {
 248         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 249         int change;
 250         u8 old_val;
 251
 252         spin_lock_irq(&chip->lock);
 253         old_val = chip->regmap[AK4113_REG_IO1];
 254         change = ucontrol->value.integer.value[0] != AK4113_IPS(old_val);
 255         if (change)
 256                 reg_write(chip, AK4113_REG_IO1,
 257                                 (old_val & (~AK4113_IPS(0xff))) |
 258                                 (AK4113_IPS(ucontrol->value.integer.value[0])));
 259         spin_unlock_irq(&chip->lock);
 260         return change;
 261 }
 262
 263 static int snd_ak4113_rate_info(struct snd_kcontrol *kcontrol,
 264                                 struct snd_ctl_elem_info *uinfo)
 265 {
 266         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 267         uinfo->count = 1;
 268         uinfo->value.integer.min = 0;
 269         uinfo->value.integer.max = 192000;
 270         return 0;
 271 }
 272
 273 static int snd_ak4113_rate_get(struct snd_kcontrol *kcontrol,
 274                                struct snd_ctl_elem_value *ucontrol)
 275 {
 276         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 277
 278         ucontrol->value.integer.value[0] = external_rate(reg_read(chip,
 279                                 AK4113_REG_RCS1));
 280         return 0;
 281 }
 282
 283 static int snd_ak4113_spdif_info(struct snd_kcontrol *kcontrol,
 284                 struct snd_ctl_elem_info *uinfo)
 285 {
 286         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 287         uinfo->count = 1;
 288         return 0;
 289 }
 290
 291 static int snd_ak4113_spdif_get(struct snd_kcontrol *kcontrol,
 292                                 struct snd_ctl_elem_value *ucontrol)
 293 {
 294         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 295         unsigned i;
 296
 297         for (i = 0; i < AK4113_REG_RXCSB_SIZE; i++)
 298                 ucontrol->value.iec958.status[i] = reg_read(chip,
 299                                 AK4113_REG_RXCSB0 + i);
 300         return 0;
 301 }
 302
 303 static int snd_ak4113_spdif_mask_info(struct snd_kcontrol *kcontrol,
 304                 struct snd_ctl_elem_info *uinfo)
 305 {
 306         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 307         uinfo->count = 1;
 308         return 0;
 309 }
 310
 311 static int snd_ak4113_spdif_mask_get(struct snd_kcontrol *kcontrol,
 312                                       struct snd_ctl_elem_value *ucontrol)
 313 {
 314         memset(ucontrol->value.iec958.status, 0xff, AK4113_REG_RXCSB_SIZE);
 315         return 0;
 316 }
 317
 318 static int snd_ak4113_spdif_pinfo(struct snd_kcontrol *kcontrol,
 319                 struct snd_ctl_elem_info *uinfo)
 320 {
 321         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 322         uinfo->value.integer.min = 0;
 323         uinfo->value.integer.max = 0xffff;
 324         uinfo->count = 4;
 325         return 0;
 326 }
 327
 328 static int snd_ak4113_spdif_pget(struct snd_kcontrol *kcontrol,
 329                                  struct snd_ctl_elem_value *ucontrol)
 330 {
 331         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 332         unsigned short tmp;
 333
 334         ucontrol->value.integer.value[0] = 0xf8f2;
 335         ucontrol->value.integer.value[1] = 0x4e1f;
 336         tmp = reg_read(chip, AK4113_REG_Pc0) |
 337                 (reg_read(chip, AK4113_REG_Pc1) << 8);
 338         ucontrol->value.integer.value[2] = tmp;
 339         tmp = reg_read(chip, AK4113_REG_Pd0) |
 340                 (reg_read(chip, AK4113_REG_Pd1) << 8);
 341         ucontrol->value.integer.value[3] = tmp;
 342         return 0;
 343 }
 344
 345 static int snd_ak4113_spdif_qinfo(struct snd_kcontrol *kcontrol,
 346                 struct snd_ctl_elem_info *uinfo)
 347 {
 348         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 349         uinfo->count = AK4113_REG_QSUB_SIZE;
 350         return 0;
 351 }
 352
 353 static int snd_ak4113_spdif_qget(struct snd_kcontrol *kcontrol,
 354                                  struct snd_ctl_elem_value *ucontrol)
 355 {
 356         struct ak4113 *chip = snd_kcontrol_chip(kcontrol);
 357         unsigned i;
 358
 359         for (i = 0; i < AK4113_REG_QSUB_SIZE; i++)
 360                 ucontrol->value.bytes.data[i] = reg_read(chip,
 361                                 AK4113_REG_QSUB_ADDR + i);
 362         return 0;
 363 }
 364
 365 /* Don't forget to change AK4113_CONTROLS define!!! */
 366 static struct snd_kcontrol_new snd_ak4113_iec958_controls[] = {
 367 {
 368         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 369         .name =         "IEC958 Parity Errors",
 370         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 371                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 372         .info =         snd_ak4113_in_error_info,
 373         .get =          snd_ak4113_in_error_get,
 374         .private_value = offsetof(struct ak4113, parity_errors),
 375 },
 376 {
 377         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 378         .name =         "IEC958 V-Bit Errors",
 379         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 380                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 381         .info =         snd_ak4113_in_error_info,
 382         .get =          snd_ak4113_in_error_get,
 383         .private_value = offsetof(struct ak4113, v_bit_errors),
 384 },
 385 {
 386         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 387         .name =         "IEC958 C-CRC Errors",
 388         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 389                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 390         .info =         snd_ak4113_in_error_info,
 391         .get =          snd_ak4113_in_error_get,
 392         .private_value = offsetof(struct ak4113, ccrc_errors),
 393 },
 394 {
 395         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 396         .name =         "IEC958 Q-CRC Errors",
 397         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 398                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 399         .info =         snd_ak4113_in_error_info,
 400         .get =          snd_ak4113_in_error_get,
 401         .private_value = offsetof(struct ak4113, qcrc_errors),
 402 },
 403 {
 404         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 405         .name =         "IEC958 External Rate",
 406         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 407                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 408         .info =         snd_ak4113_rate_info,
 409         .get =          snd_ak4113_rate_get,
 410 },
 411 {
 412         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 413         .name =         SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
 414         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 415         .info =         snd_ak4113_spdif_mask_info,
 416         .get =          snd_ak4113_spdif_mask_get,
 417 },
 418 {
 419         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 420         .name =         SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
 421         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 422                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 423         .info =         snd_ak4113_spdif_info,
 424         .get =          snd_ak4113_spdif_get,
 425 },
 426 {
 427         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 428         .name =         "IEC958 Preample Capture Default",
 429         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 430                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 431         .info =         snd_ak4113_spdif_pinfo,
 432         .get =          snd_ak4113_spdif_pget,
 433 },
 434 {
 435         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 436         .name =         "IEC958 Q-subcode Capture Default",
 437         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 438                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 439         .info =         snd_ak4113_spdif_qinfo,
 440         .get =          snd_ak4113_spdif_qget,
 441 },
 442 {
 443         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 444         .name =         "IEC958 Audio",
 445         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 446                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 447         .info =         snd_ak4113_in_bit_info,
 448         .get =          snd_ak4113_in_bit_get,
 449         .private_value = (1<<31) | (1<<8) | AK4113_REG_RCS0,
 450 },
 451 {
 452         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 453         .name =         "IEC958 Non-PCM Bitstream",
 454         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 455                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 456         .info =         snd_ak4113_in_bit_info,
 457         .get =          snd_ak4113_in_bit_get,
 458         .private_value = (0<<8) | AK4113_REG_RCS1,
 459 },
 460 {
 461         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 462         .name =         "IEC958 DTS Bitstream",
 463         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 464                 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 465         .info =         snd_ak4113_in_bit_info,
 466         .get =          snd_ak4113_in_bit_get,
 467         .private_value = (1<<8) | AK4113_REG_RCS1,
 468 },
 469 {
 470         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 471         .name =         "AK4113 Input Select",
 472         .access =       SNDRV_CTL_ELEM_ACCESS_READ |
 473                 SNDRV_CTL_ELEM_ACCESS_WRITE,
 474         .info =         snd_ak4113_rx_info,
 475         .get =          snd_ak4113_rx_get,
 476         .put =          snd_ak4113_rx_put,
 477 }
 478 };
 479
 480 static void snd_ak4113_proc_regs_read(struct snd_info_entry *entry,
 481                 struct snd_info_buffer *buffer)
 482 {
 483         struct ak4113 *ak4113 = entry->private_data;
 484         int reg, val;
 485         /* all ak4113 registers 0x00 - 0x1c */
 486         for (reg = 0; reg < 0x1d; reg++) {
 487                 val = reg_read(ak4113, reg);
 488                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
 489         }
 490 }
 491
 492 static void snd_ak4113_proc_init(struct ak4113 *ak4113)
 493 {
 494         struct snd_info_entry *entry;
 495         if (!snd_card_proc_new(ak4113->card, "ak4113", &entry))
 496                 snd_info_set_text_ops(entry, ak4113, snd_ak4113_proc_regs_read);
 497 }
 498
 499 int snd_ak4113_build(struct ak4113 *ak4113,
 500                 struct snd_pcm_substream *cap_substream)
 501 {
 502         struct snd_kcontrol *kctl;
 503         unsigned int idx;
 504         int err;
 505
 506         if (snd_BUG_ON(!cap_substream))
 507                 return -EINVAL;
 508         ak4113->substream = cap_substream;
 509         for (idx = 0; idx < AK4113_CONTROLS; idx++) {
 510                 kctl = snd_ctl_new1(&snd_ak4113_iec958_controls[idx], ak4113);
 511                 if (kctl == NULL)
 512                         return -ENOMEM;
 513                 kctl->id.device = cap_substream->pcm->device;
 514                 kctl->id.subdevice = cap_substream->number;
 515                 err = snd_ctl_add(ak4113->card, kctl);
 516                 if (err < 0)
 517                         return err;
 518                 ak4113->kctls[idx] = kctl;
 519         }
 520         snd_ak4113_proc_init(ak4113);
 521         /* trigger workq */
 522         schedule_delayed_work(&ak4113->work, HZ / 10);
 523         return 0;
 524 }
 525 EXPORT_SYMBOL_GPL(snd_ak4113_build);
 526
 527 int snd_ak4113_external_rate(struct ak4113 *ak4113)
 528 {
 529         unsigned char rcs1;
 530
 531         rcs1 = reg_read(ak4113, AK4113_REG_RCS1);
 532         return external_rate(rcs1);
 533 }
 534 EXPORT_SYMBOL_GPL(snd_ak4113_external_rate);
 535
 536 int snd_ak4113_check_rate_and_errors(struct ak4113 *ak4113, unsigned int flags)
 537 {
 538         struct snd_pcm_runtime *runtime =
 539                 ak4113->substream ? ak4113->substream->runtime : NULL;
 540         unsigned long _flags;
 541         int res = 0;
 542         unsigned char rcs0, rcs1, rcs2;
 543         unsigned char c0, c1;
 544
 545         rcs1 = reg_read(ak4113, AK4113_REG_RCS1);
 546         if (flags & AK4113_CHECK_NO_STAT)
 547                 goto __rate;
 548         rcs0 = reg_read(ak4113, AK4113_REG_RCS0);
 549         rcs2 = reg_read(ak4113, AK4113_REG_RCS2);
 550         spin_lock_irqsave(&ak4113->lock, _flags);
 551         if (rcs0 & AK4113_PAR)
 552                 ak4113->parity_errors++;
 553         if (rcs0 & AK4113_V)
 554                 ak4113->v_bit_errors++;
 555         if (rcs2 & AK4113_CCRC)
 556                 ak4113->ccrc_errors++;
 557         if (rcs2 & AK4113_QCRC)
 558                 ak4113->qcrc_errors++;
 559         c0 = (ak4113->rcs0 & (AK4113_QINT | AK4113_CINT | AK4113_STC |
 560                                 AK4113_AUDION | AK4113_AUTO | AK4113_UNLCK)) ^
 561                 (rcs0 & (AK4113_QINT | AK4113_CINT | AK4113_STC |
 562                          AK4113_AUDION | AK4113_AUTO | AK4113_UNLCK));
 563         c1 = (ak4113->rcs1 & (AK4113_DTSCD | AK4113_NPCM | AK4113_PEM |
 564                                 AK4113_DAT | 0xf0)) ^
 565                 (rcs1 & (AK4113_DTSCD | AK4113_NPCM | AK4113_PEM |
 566                          AK4113_DAT | 0xf0));
 567         ak4113->rcs0 = rcs0 & ~(AK4113_QINT | AK4113_CINT | AK4113_STC);
 568         ak4113->rcs1 = rcs1;
 569         ak4113->rcs2 = rcs2;
 570         spin_unlock_irqrestore(&ak4113->lock, _flags);
 571
 572         if (rcs0 & AK4113_PAR)
 573                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 574                                 &ak4113->kctls[0]->id);
 575         if (rcs0 & AK4113_V)
 576                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 577                                 &ak4113->kctls[1]->id);
 578         if (rcs2 & AK4113_CCRC)
 579                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 580                                 &ak4113->kctls[2]->id);
 581         if (rcs2 & AK4113_QCRC)
 582                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 583                                 &ak4113->kctls[3]->id);
 584
 585         /* rate change */
 586         if (c1 & 0xf0)
 587                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 588                                 &ak4113->kctls[4]->id);
 589
 590         if ((c1 & AK4113_PEM) | (c0 & AK4113_CINT))
 591                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 592                                 &ak4113->kctls[6]->id);
 593         if (c0 & AK4113_QINT)
 594                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 595                                 &ak4113->kctls[8]->id);
 596
 597         if (c0 & AK4113_AUDION)
 598                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 599                                 &ak4113->kctls[9]->id);
 600         if (c1 & AK4113_NPCM)
 601                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 602                                 &ak4113->kctls[10]->id);
 603         if (c1 & AK4113_DTSCD)
 604                 snd_ctl_notify(ak4113->card, SNDRV_CTL_EVENT_MASK_VALUE,
 605                                 &ak4113->kctls[11]->id);
 606
 607         if (ak4113->change_callback && (c0 | c1) != 0)
 608                 ak4113->change_callback(ak4113, c0, c1);
 609
 610 __rate:
 611         /* compare rate */
 612         res = external_rate(rcs1);
 613         if (!(flags & AK4113_CHECK_NO_RATE) && runtime &&
 614                         (runtime->rate != res)) {
 615                 snd_pcm_stream_lock_irqsave(ak4113->substream, _flags);
 616                 if (snd_pcm_running(ak4113->substream)) {
 617                         /*printk(KERN_DEBUG "rate changed (%i <- %i)\n",
 618                          * runtime->rate, res); */
 619                         snd_pcm_stop(ak4113->substream,
 620                                         SNDRV_PCM_STATE_DRAINING);
 621                         wake_up(&runtime->sleep);
 622                         res = 1;
 623                 }
 624                 snd_pcm_stream_unlock_irqrestore(ak4113->substream, _flags);
 625         }
 626         return res;
 627 }
 628 EXPORT_SYMBOL_GPL(snd_ak4113_check_rate_and_errors);
 629
 630 static void ak4113_stats(struct work_struct *work)
 631 {
 632         struct ak4113 *chip = container_of(work, struct ak4113, work.work);
 633
 634         if (!chip->init)
 635                 snd_ak4113_check_rate_and_errors(chip, chip->check_flags);
 636
 637         schedule_delayed_work(&chip->work, HZ / 10);
 638 }