sound/i2c/other/ak4114.c

   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@suse.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 <sound/driver.h>
  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/ak4114.h>
  30 #include <sound/asoundef.h>
  31
  32 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  33 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
  34 MODULE_LICENSE("GPL");
  35
  36 #define AK4114_ADDR                     0x00 /* fixed address */
  37
  38 static void ak4114_stats(struct work_struct *work);
  39
  40 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
  41 {
  42         ak4114->write(ak4114->private_data, reg, val);
  43         if (reg <= AK4114_REG_INT1_MASK)
  44                 ak4114->regmap[reg] = val;
  45         else if (reg >= AK4114_REG_RXCSB0 && reg <= AK4114_REG_TXCSB4)
  46                 ak4114->txcsb[reg-AK4114_REG_RXCSB0] = val;
  47 }
  48
  49 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
  50 {
  51         return ak4114->read(ak4114->private_data, reg);
  52 }
  53
  54 #if 0
  55 static void reg_dump(struct ak4114 *ak4114)
  56 {
  57         int i;
  58
  59         printk(KERN_DEBUG "AK4114 REG DUMP:\n");
  60         for (i = 0; i < 0x20; i++)
  61                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
  62 }
  63 #endif
  64
  65 static void snd_ak4114_free(struct ak4114 *chip)
  66 {
  67         chip->init = 1; /* don't schedule new work */
  68         mb();
  69         flush_scheduled_work();
  70         kfree(chip);
  71 }
  72
  73 static int snd_ak4114_dev_free(struct snd_device *device)
  74 {
  75         struct ak4114 *chip = device->device_data;
  76         snd_ak4114_free(chip);
  77         return 0;
  78 }
  79
  80 int snd_ak4114_create(struct snd_card *card,
  81                       ak4114_read_t *read, ak4114_write_t *write,
  82                       const unsigned char pgm[7], const unsigned char txcsb[5],
  83                       void *private_data, struct ak4114 **r_ak4114)
  84 {
  85         struct ak4114 *chip;
  86         int err = 0;
  87         unsigned char reg;
  88         static struct snd_device_ops ops = {
  89                 .dev_free =     snd_ak4114_dev_free,
  90         };
  91
  92         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  93         if (chip == NULL)
  94                 return -ENOMEM;
  95         spin_lock_init(&chip->lock);
  96         chip->card = card;
  97         chip->read = read;
  98         chip->write = write;
  99         chip->private_data = private_data;
 100
 101         for (reg = 0; reg < 7; reg++)
 102                 chip->regmap[reg] = pgm[reg];
 103         for (reg = 0; reg < 5; reg++)
 104                 chip->txcsb[reg] = txcsb[reg];
 105
 106         snd_ak4114_reinit(chip);
 107
 108         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
 109         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
 110
 111         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
 112                 goto __fail;
 113
 114         if (r_ak4114)
 115                 *r_ak4114 = chip;
 116         return 0;
 117
 118       __fail:
 119         snd_ak4114_free(chip);
 120         return err < 0 ? err : -EIO;
 121 }
 122
 123 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 124 {
 125         if (reg <= AK4114_REG_INT1_MASK)
 126                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 127         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
 128                 reg_write(chip, reg, (chip->txcsb[reg] & ~mask) | val);
 129 }
 130
 131 void snd_ak4114_reinit(struct ak4114 *chip)
 132 {
 133         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
 134
 135         chip->init = 1;
 136         mb();
 137         flush_scheduled_work();
 138         /* bring the chip to reset state and powerdown state */
 139         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
 140         udelay(200);
 141         /* release reset, but leave powerdown */
 142         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
 143         udelay(200);
 144         for (reg = 1; reg < 7; reg++)
 145                 reg_write(chip, reg, chip->regmap[reg]);
 146         for (reg = 0; reg < 5; reg++)
 147                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
 148         /* release powerdown, everything is initialized now */
 149         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
 150         /* bring up statistics / event queing */
 151         chip->init = 0;
 152         INIT_DELAYED_WORK(&chip->work, ak4114_stats);
 153         schedule_delayed_work(&chip->work, HZ / 10);
 154 }
 155
 156 static unsigned int external_rate(unsigned char rcs1)
 157 {
 158         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
 159         case AK4114_FS_32000HZ: return 32000;
 160         case AK4114_FS_44100HZ: return 44100;
 161         case AK4114_FS_48000HZ: return 48000;
 162         case AK4114_FS_88200HZ: return 88200;
 163         case AK4114_FS_96000HZ: return 96000;
 164         case AK4114_FS_176400HZ: return 176400;
 165         case AK4114_FS_192000HZ: return 192000;
 166         default:                return 0;
 167         }
 168 }
 169
 170 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
 171                                     struct snd_ctl_elem_info *uinfo)
 172 {
 173         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 174         uinfo->count = 1;
 175         uinfo->value.integer.min = 0;
 176         uinfo->value.integer.max = LONG_MAX;
 177         return 0;
 178 }
 179
 180 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
 181                                    struct snd_ctl_elem_value *ucontrol)
 182 {
 183         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 184         long *ptr;
 185
 186         spin_lock_irq(&chip->lock);
 187         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 188         ucontrol->value.integer.value[0] = *ptr;
 189         *ptr = 0;
 190         spin_unlock_irq(&chip->lock);
 191         return 0;
 192 }
 193
 194 static int snd_ak4114_in_bit_info(struct snd_kcontrol *kcontrol,
 195                                   struct snd_ctl_elem_info *uinfo)
 196 {
 197         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 198         uinfo->count = 1;
 199         uinfo->value.integer.min = 0;
 200         uinfo->value.integer.max = 1;
 201         return 0;
 202 }
 203
 204 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
 205                                  struct snd_ctl_elem_value *ucontrol)
 206 {
 207         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 208         unsigned char reg = kcontrol->private_value & 0xff;
 209         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 210         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 211
 212         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 213         return 0;
 214 }
 215
 216 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
 217                                 struct snd_ctl_elem_info *uinfo)
 218 {
 219         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 220         uinfo->count = 1;
 221         uinfo->value.integer.min = 0;
 222         uinfo->value.integer.max = 192000;
 223         return 0;
 224 }
 225
 226 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
 227                                struct snd_ctl_elem_value *ucontrol)
 228 {
 229         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 230
 231         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
 232         return 0;
 233 }
 234
 235 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 236 {
 237         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 238         uinfo->count = 1;
 239         return 0;
 240 }
 241
 242 static int snd_ak4114_spdif_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_RXCSB_SIZE; i++)
 249                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
 250         return 0;
 251 }
 252
 253 static int snd_ak4114_spdif_playback_get(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                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
 261         return 0;
 262 }
 263
 264 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
 265                                          struct snd_ctl_elem_value *ucontrol)
 266 {
 267         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 268         unsigned i;
 269
 270         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 271                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
 272         return 0;
 273 }
 274
 275 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 276 {
 277         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 278         uinfo->count = 1;
 279         return 0;
 280 }
 281
 282 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
 283                                       struct snd_ctl_elem_value *ucontrol)
 284 {
 285         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
 286         return 0;
 287 }
 288
 289 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 290 {
 291         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 292         uinfo->value.integer.min = 0;
 293         uinfo->value.integer.max = 0xffff;
 294         uinfo->count = 4;
 295         return 0;
 296 }
 297
 298 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
 299                                  struct snd_ctl_elem_value *ucontrol)
 300 {
 301         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 302         unsigned short tmp;
 303
 304         ucontrol->value.integer.value[0] = 0xf8f2;
 305         ucontrol->value.integer.value[1] = 0x4e1f;
 306         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
 307         ucontrol->value.integer.value[2] = tmp;
 308         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
 309         ucontrol->value.integer.value[3] = tmp;
 310         return 0;
 311 }
 312
 313 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 314 {
 315         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 316         uinfo->count = AK4114_REG_QSUB_SIZE;
 317         return 0;
 318 }
 319
 320 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
 321                                  struct snd_ctl_elem_value *ucontrol)
 322 {
 323         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 324         unsigned i;
 325
 326         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
 327                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
 328         return 0;
 329 }
 330
 331 /* Don't forget to change AK4114_CONTROLS define!!! */
 332 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 333 {
 334         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 335         .name =         "IEC958 Parity Errors",
 336         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 337         .info =         snd_ak4114_in_error_info,
 338         .get =          snd_ak4114_in_error_get,
 339         .private_value = offsetof(struct ak4114, parity_errors),
 340 },
 341 {
 342         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 343         .name =         "IEC958 V-Bit Errors",
 344         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 345         .info =         snd_ak4114_in_error_info,
 346         .get =          snd_ak4114_in_error_get,
 347         .private_value = offsetof(struct ak4114, v_bit_errors),
 348 },
 349 {
 350         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 351         .name =         "IEC958 C-CRC Errors",
 352         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 353         .info =         snd_ak4114_in_error_info,
 354         .get =          snd_ak4114_in_error_get,
 355         .private_value = offsetof(struct ak4114, ccrc_errors),
 356 },
 357 {
 358         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 359         .name =         "IEC958 Q-CRC Errors",
 360         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 361         .info =         snd_ak4114_in_error_info,
 362         .get =          snd_ak4114_in_error_get,
 363         .private_value = offsetof(struct ak4114, qcrc_errors),
 364 },
 365 {
 366         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 367         .name =         "IEC958 External Rate",
 368         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 369         .info =         snd_ak4114_rate_info,
 370         .get =          snd_ak4114_rate_get,
 371 },
 372 {
 373         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 374         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 375         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 376         .info =         snd_ak4114_spdif_mask_info,
 377         .get =          snd_ak4114_spdif_mask_get,
 378 },
 379 {
 380         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 381         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 382         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 383         .info =         snd_ak4114_spdif_info,
 384         .get =          snd_ak4114_spdif_playback_get,
 385         .put =          snd_ak4114_spdif_playback_put,
 386 },
 387 {
 388         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 389         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 390         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 391         .info =         snd_ak4114_spdif_mask_info,
 392         .get =          snd_ak4114_spdif_mask_get,
 393 },
 394 {
 395         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 396         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 397         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 398         .info =         snd_ak4114_spdif_info,
 399         .get =          snd_ak4114_spdif_get,
 400 },
 401 {
 402         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 403         .name =         "IEC958 Preample Capture Default",
 404         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 405         .info =         snd_ak4114_spdif_pinfo,
 406         .get =          snd_ak4114_spdif_pget,
 407 },
 408 {
 409         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 410         .name =         "IEC958 Q-subcode Capture Default",
 411         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 412         .info =         snd_ak4114_spdif_qinfo,
 413         .get =          snd_ak4114_spdif_qget,
 414 },
 415 {
 416         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 417         .name =         "IEC958 Audio",
 418         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 419         .info =         snd_ak4114_in_bit_info,
 420         .get =          snd_ak4114_in_bit_get,
 421         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
 422 },
 423 {
 424         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 425         .name =         "IEC958 Non-PCM Bitstream",
 426         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 427         .info =         snd_ak4114_in_bit_info,
 428         .get =          snd_ak4114_in_bit_get,
 429         .private_value = (6<<8) | AK4114_REG_RCS1,
 430 },
 431 {
 432         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 433         .name =         "IEC958 DTS Bitstream",
 434         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 435         .info =         snd_ak4114_in_bit_info,
 436         .get =          snd_ak4114_in_bit_get,
 437         .private_value = (3<<8) | AK4114_REG_RCS1,
 438 }
 439 };
 440
 441 int snd_ak4114_build(struct ak4114 *ak4114,
 442                      struct snd_pcm_substream *ply_substream,
 443                      struct snd_pcm_substream *cap_substream)
 444 {
 445         struct snd_kcontrol *kctl;
 446         unsigned int idx;
 447         int err;
 448
 449         snd_assert(cap_substream, return -EINVAL);
 450         ak4114->playback_substream = ply_substream;
 451         ak4114->capture_substream = cap_substream;
 452         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
 453                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
 454                 if (kctl == NULL)
 455                         return -ENOMEM;
 456                 if (!strstr(kctl->id.name, "Playback")) {
 457                         if (ply_substream == NULL) {
 458                                 snd_ctl_free_one(kctl);
 459                                 ak4114->kctls[idx] = NULL;
 460                                 continue;
 461                         }
 462                         kctl->id.device = ply_substream->pcm->device;
 463                         kctl->id.subdevice = ply_substream->number;
 464                 } else {
 465                         kctl->id.device = cap_substream->pcm->device;
 466                         kctl->id.subdevice = cap_substream->number;
 467                 }
 468                 err = snd_ctl_add(ak4114->card, kctl);
 469                 if (err < 0)
 470                         return err;
 471                 ak4114->kctls[idx] = kctl;
 472         }
 473         return 0;
 474 }
 475
 476 int snd_ak4114_external_rate(struct ak4114 *ak4114)
 477 {
 478         unsigned char rcs1;
 479
 480         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 481         return external_rate(rcs1);
 482 }
 483
 484 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
 485 {
 486         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
 487         unsigned long _flags;
 488         int res = 0;
 489         unsigned char rcs0, rcs1;
 490         unsigned char c0, c1;
 491
 492         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 493         if (flags & AK4114_CHECK_NO_STAT)
 494                 goto __rate;
 495         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
 496         spin_lock_irqsave(&ak4114->lock, _flags);
 497         if (rcs0 & AK4114_PAR)
 498                 ak4114->parity_errors++;
 499         if (rcs1 & AK4114_V)
 500                 ak4114->v_bit_errors++;
 501         if (rcs1 & AK4114_CCRC)
 502                 ak4114->ccrc_errors++;
 503         if (rcs1 & AK4114_QCRC)
 504                 ak4114->qcrc_errors++;
 505         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
 506                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
 507         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
 508         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
 509         ak4114->rcs1 = rcs1;
 510         spin_unlock_irqrestore(&ak4114->lock, _flags);
 511
 512         if (rcs0 & AK4114_PAR)
 513                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[0]->id);
 514         if (rcs0 & AK4114_V)
 515                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[1]->id);
 516         if (rcs1 & AK4114_CCRC)
 517                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[2]->id);
 518         if (rcs1 & AK4114_QCRC)
 519                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[3]->id);
 520
 521         /* rate change */
 522         if (c1 & 0xf0)
 523                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[4]->id);
 524
 525         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
 526                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[9]->id);
 527         if (c0 & AK4114_QINT)
 528                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[10]->id);
 529
 530         if (c0 & AK4114_AUDION)
 531                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[11]->id);
 532         if (c0 & AK4114_AUTO)
 533                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[12]->id);
 534         if (c0 & AK4114_DTSCD)
 535                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[13]->id);
 536
 537         if (ak4114->change_callback && (c0 | c1) != 0)
 538                 ak4114->change_callback(ak4114, c0, c1);
 539
 540       __rate:
 541         /* compare rate */
 542         res = external_rate(rcs1);
 543         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 544                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
 545                 if (snd_pcm_running(ak4114->capture_substream)) {
 546                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 547                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
 548                         res = 1;
 549                 }
 550                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
 551         }
 552         return res;
 553 }
 554
 555 static void ak4114_stats(struct work_struct *work)
 556 {
 557         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
 558
 559         if (chip->init)
 560                 return;
 561         snd_ak4114_check_rate_and_errors(chip, 0);
 562         schedule_delayed_work(&chip->work, HZ / 10);
 563 }
 564
 565 EXPORT_SYMBOL(snd_ak4114_create);
 566 EXPORT_SYMBOL(snd_ak4114_reg_write);
 567 EXPORT_SYMBOL(snd_ak4114_reinit);
 568 EXPORT_SYMBOL(snd_ak4114_build);
 569 EXPORT_SYMBOL(snd_ak4114_external_rate);
 570 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);