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_TXCSB0 && reg <= AK4114_REG_TXCSB4)
  46                 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = 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         cancel_delayed_work(&chip->work);
  70         flush_scheduled_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[7], 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
 103         for (reg = 0; reg < 7; reg++)
 104                 chip->regmap[reg] = pgm[reg];
 105         for (reg = 0; reg < 5; reg++)
 106                 chip->txcsb[reg] = txcsb[reg];
 107
 108         snd_ak4114_reinit(chip);
 109
 110         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
 111         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
 112
 113         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
 114                 goto __fail;
 115
 116         if (r_ak4114)
 117                 *r_ak4114 = chip;
 118         return 0;
 119
 120       __fail:
 121         snd_ak4114_free(chip);
 122         return err < 0 ? err : -EIO;
 123 }
 124
 125 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 126 {
 127         if (reg <= AK4114_REG_INT1_MASK)
 128                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 129         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
 130                 reg_write(chip, reg,
 131                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
 132 }
 133
 134 void snd_ak4114_reinit(struct ak4114 *chip)
 135 {
 136         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
 137
 138         chip->init = 1;
 139         mb();
 140         flush_scheduled_work();
 141         /* bring the chip to reset state and powerdown state */
 142         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
 143         udelay(200);
 144         /* release reset, but leave powerdown */
 145         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
 146         udelay(200);
 147         for (reg = 1; reg < 7; reg++)
 148                 reg_write(chip, reg, chip->regmap[reg]);
 149         for (reg = 0; reg < 5; reg++)
 150                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
 151         /* release powerdown, everything is initialized now */
 152         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
 153         /* bring up statistics / event queing */
 154         chip->init = 0;
 155         schedule_delayed_work(&chip->work, HZ / 10);
 156 }
 157
 158 static unsigned int external_rate(unsigned char rcs1)
 159 {
 160         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
 161         case AK4114_FS_32000HZ: return 32000;
 162         case AK4114_FS_44100HZ: return 44100;
 163         case AK4114_FS_48000HZ: return 48000;
 164         case AK4114_FS_88200HZ: return 88200;
 165         case AK4114_FS_96000HZ: return 96000;
 166         case AK4114_FS_176400HZ: return 176400;
 167         case AK4114_FS_192000HZ: return 192000;
 168         default:                return 0;
 169         }
 170 }
 171
 172 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
 173                                     struct snd_ctl_elem_info *uinfo)
 174 {
 175         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 176         uinfo->count = 1;
 177         uinfo->value.integer.min = 0;
 178         uinfo->value.integer.max = LONG_MAX;
 179         return 0;
 180 }
 181
 182 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
 183                                    struct snd_ctl_elem_value *ucontrol)
 184 {
 185         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 186         long *ptr;
 187
 188         spin_lock_irq(&chip->lock);
 189         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 190         ucontrol->value.integer.value[0] = *ptr;
 191         *ptr = 0;
 192         spin_unlock_irq(&chip->lock);
 193         return 0;
 194 }
 195
 196 static int snd_ak4114_in_bit_info(struct snd_kcontrol *kcontrol,
 197                                   struct snd_ctl_elem_info *uinfo)
 198 {
 199         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 200         uinfo->count = 1;
 201         uinfo->value.integer.min = 0;
 202         uinfo->value.integer.max = 1;
 203         return 0;
 204 }
 205
 206 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
 207                                  struct snd_ctl_elem_value *ucontrol)
 208 {
 209         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 210         unsigned char reg = kcontrol->private_value & 0xff;
 211         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 212         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 213
 214         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 215         return 0;
 216 }
 217
 218 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
 219                                 struct snd_ctl_elem_info *uinfo)
 220 {
 221         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 222         uinfo->count = 1;
 223         uinfo->value.integer.min = 0;
 224         uinfo->value.integer.max = 192000;
 225         return 0;
 226 }
 227
 228 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
 229                                struct snd_ctl_elem_value *ucontrol)
 230 {
 231         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 232
 233         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
 234         return 0;
 235 }
 236
 237 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 238 {
 239         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 240         uinfo->count = 1;
 241         return 0;
 242 }
 243
 244 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
 245                                 struct snd_ctl_elem_value *ucontrol)
 246 {
 247         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 248         unsigned i;
 249
 250         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
 251                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
 252         return 0;
 253 }
 254
 255 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
 256                                          struct snd_ctl_elem_value *ucontrol)
 257 {
 258         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 259         unsigned i;
 260
 261         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 262                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
 263         return 0;
 264 }
 265
 266 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
 267                                          struct snd_ctl_elem_value *ucontrol)
 268 {
 269         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 270         unsigned i;
 271
 272         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 273                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
 274         return 0;
 275 }
 276
 277 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 278 {
 279         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 280         uinfo->count = 1;
 281         return 0;
 282 }
 283
 284 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
 285                                       struct snd_ctl_elem_value *ucontrol)
 286 {
 287         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
 288         return 0;
 289 }
 290
 291 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 292 {
 293         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 294         uinfo->value.integer.min = 0;
 295         uinfo->value.integer.max = 0xffff;
 296         uinfo->count = 4;
 297         return 0;
 298 }
 299
 300 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
 301                                  struct snd_ctl_elem_value *ucontrol)
 302 {
 303         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 304         unsigned short tmp;
 305
 306         ucontrol->value.integer.value[0] = 0xf8f2;
 307         ucontrol->value.integer.value[1] = 0x4e1f;
 308         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
 309         ucontrol->value.integer.value[2] = tmp;
 310         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
 311         ucontrol->value.integer.value[3] = tmp;
 312         return 0;
 313 }
 314
 315 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 316 {
 317         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 318         uinfo->count = AK4114_REG_QSUB_SIZE;
 319         return 0;
 320 }
 321
 322 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
 323                                  struct snd_ctl_elem_value *ucontrol)
 324 {
 325         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 326         unsigned i;
 327
 328         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
 329                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
 330         return 0;
 331 }
 332
 333 /* Don't forget to change AK4114_CONTROLS define!!! */
 334 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 335 {
 336         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 337         .name =         "IEC958 Parity Errors",
 338         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 339         .info =         snd_ak4114_in_error_info,
 340         .get =          snd_ak4114_in_error_get,
 341         .private_value = offsetof(struct ak4114, parity_errors),
 342 },
 343 {
 344         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 345         .name =         "IEC958 V-Bit Errors",
 346         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 347         .info =         snd_ak4114_in_error_info,
 348         .get =          snd_ak4114_in_error_get,
 349         .private_value = offsetof(struct ak4114, v_bit_errors),
 350 },
 351 {
 352         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 353         .name =         "IEC958 C-CRC Errors",
 354         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 355         .info =         snd_ak4114_in_error_info,
 356         .get =          snd_ak4114_in_error_get,
 357         .private_value = offsetof(struct ak4114, ccrc_errors),
 358 },
 359 {
 360         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 361         .name =         "IEC958 Q-CRC Errors",
 362         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 363         .info =         snd_ak4114_in_error_info,
 364         .get =          snd_ak4114_in_error_get,
 365         .private_value = offsetof(struct ak4114, qcrc_errors),
 366 },
 367 {
 368         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 369         .name =         "IEC958 External Rate",
 370         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 371         .info =         snd_ak4114_rate_info,
 372         .get =          snd_ak4114_rate_get,
 373 },
 374 {
 375         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 376         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 377         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 378         .info =         snd_ak4114_spdif_mask_info,
 379         .get =          snd_ak4114_spdif_mask_get,
 380 },
 381 {
 382         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 383         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 384         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 385         .info =         snd_ak4114_spdif_info,
 386         .get =          snd_ak4114_spdif_playback_get,
 387         .put =          snd_ak4114_spdif_playback_put,
 388 },
 389 {
 390         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 391         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 392         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 393         .info =         snd_ak4114_spdif_mask_info,
 394         .get =          snd_ak4114_spdif_mask_get,
 395 },
 396 {
 397         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 398         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 399         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 400         .info =         snd_ak4114_spdif_info,
 401         .get =          snd_ak4114_spdif_get,
 402 },
 403 {
 404         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 405         .name =         "IEC958 Preample Capture Default",
 406         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 407         .info =         snd_ak4114_spdif_pinfo,
 408         .get =          snd_ak4114_spdif_pget,
 409 },
 410 {
 411         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 412         .name =         "IEC958 Q-subcode Capture Default",
 413         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 414         .info =         snd_ak4114_spdif_qinfo,
 415         .get =          snd_ak4114_spdif_qget,
 416 },
 417 {
 418         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 419         .name =         "IEC958 Audio",
 420         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 421         .info =         snd_ak4114_in_bit_info,
 422         .get =          snd_ak4114_in_bit_get,
 423         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
 424 },
 425 {
 426         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 427         .name =         "IEC958 Non-PCM Bitstream",
 428         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 429         .info =         snd_ak4114_in_bit_info,
 430         .get =          snd_ak4114_in_bit_get,
 431         .private_value = (6<<8) | AK4114_REG_RCS1,
 432 },
 433 {
 434         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 435         .name =         "IEC958 DTS Bitstream",
 436         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 437         .info =         snd_ak4114_in_bit_info,
 438         .get =          snd_ak4114_in_bit_get,
 439         .private_value = (3<<8) | AK4114_REG_RCS1,
 440 }
 441 };
 442
 443 int snd_ak4114_build(struct ak4114 *ak4114,
 444                      struct snd_pcm_substream *ply_substream,
 445                      struct snd_pcm_substream *cap_substream)
 446 {
 447         struct snd_kcontrol *kctl;
 448         unsigned int idx;
 449         int err;
 450
 451         snd_assert(cap_substream, return -EINVAL);
 452         ak4114->playback_substream = ply_substream;
 453         ak4114->capture_substream = cap_substream;
 454         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
 455                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
 456                 if (kctl == NULL)
 457                         return -ENOMEM;
 458                 if (!strstr(kctl->id.name, "Playback")) {
 459                         if (ply_substream == NULL) {
 460                                 snd_ctl_free_one(kctl);
 461                                 ak4114->kctls[idx] = NULL;
 462                                 continue;
 463                         }
 464                         kctl->id.device = ply_substream->pcm->device;
 465                         kctl->id.subdevice = ply_substream->number;
 466                 } else {
 467                         kctl->id.device = cap_substream->pcm->device;
 468                         kctl->id.subdevice = cap_substream->number;
 469                 }
 470                 err = snd_ctl_add(ak4114->card, kctl);
 471                 if (err < 0)
 472                         return err;
 473                 ak4114->kctls[idx] = kctl;
 474         }
 475         return 0;
 476 }
 477
 478 int snd_ak4114_external_rate(struct ak4114 *ak4114)
 479 {
 480         unsigned char rcs1;
 481
 482         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 483         return external_rate(rcs1);
 484 }
 485
 486 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
 487 {
 488         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
 489         unsigned long _flags;
 490         int res = 0;
 491         unsigned char rcs0, rcs1;
 492         unsigned char c0, c1;
 493
 494         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 495         if (flags & AK4114_CHECK_NO_STAT)
 496                 goto __rate;
 497         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
 498         spin_lock_irqsave(&ak4114->lock, _flags);
 499         if (rcs0 & AK4114_PAR)
 500                 ak4114->parity_errors++;
 501         if (rcs1 & AK4114_V)
 502                 ak4114->v_bit_errors++;
 503         if (rcs1 & AK4114_CCRC)
 504                 ak4114->ccrc_errors++;
 505         if (rcs1 & AK4114_QCRC)
 506                 ak4114->qcrc_errors++;
 507         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
 508                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
 509         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
 510         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
 511         ak4114->rcs1 = rcs1;
 512         spin_unlock_irqrestore(&ak4114->lock, _flags);
 513
 514         if (rcs0 & AK4114_PAR)
 515                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[0]->id);
 516         if (rcs0 & AK4114_V)
 517                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[1]->id);
 518         if (rcs1 & AK4114_CCRC)
 519                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[2]->id);
 520         if (rcs1 & AK4114_QCRC)
 521                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[3]->id);
 522
 523         /* rate change */
 524         if (c1 & 0xf0)
 525                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[4]->id);
 526
 527         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
 528                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[9]->id);
 529         if (c0 & AK4114_QINT)
 530                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[10]->id);
 531
 532         if (c0 & AK4114_AUDION)
 533                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[11]->id);
 534         if (c0 & AK4114_AUTO)
 535                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[12]->id);
 536         if (c0 & AK4114_DTSCD)
 537                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[13]->id);
 538
 539         if (ak4114->change_callback && (c0 | c1) != 0)
 540                 ak4114->change_callback(ak4114, c0, c1);
 541
 542       __rate:
 543         /* compare rate */
 544         res = external_rate(rcs1);
 545         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 546                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
 547                 if (snd_pcm_running(ak4114->capture_substream)) {
 548                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 549                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
 550                         res = 1;
 551                 }
 552                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
 553         }
 554         return res;
 555 }
 556
 557 static void ak4114_stats(struct work_struct *work)
 558 {
 559         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
 560
 561         if (chip->init)
 562                 return;
 563         snd_ak4114_check_rate_and_errors(chip, 0);
 564         schedule_delayed_work(&chip->work, HZ / 10);
 565 }
 566
 567 EXPORT_SYMBOL(snd_ak4114_create);
 568 EXPORT_SYMBOL(snd_ak4114_reg_write);
 569 EXPORT_SYMBOL(snd_ak4114_reinit);
 570 EXPORT_SYMBOL(snd_ak4114_build);
 571 EXPORT_SYMBOL(snd_ak4114_external_rate);
 572 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);