sound/i2c/other/ak4117.c

   1 /*
   2  *  Routines for control of the AK4117 via 4-wire serial interface
   3  *  IEC958 (S/PDIF) receiver by Asahi Kasei
   4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <linux/slab.h>
  24 #include <linux/delay.h>
  25 #include <linux/module.h>
  26 #include <sound/core.h>
  27 #include <sound/control.h>
  28 #include <sound/pcm.h>
  29 #include <sound/ak4117.h>
  30 #include <sound/asoundef.h>
  31
  32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  33 MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei");
  34 MODULE_LICENSE("GPL");
  35
  36 #define AK4117_ADDR                     0x00 /* fixed address */
  37
  38 static void snd_ak4117_timer(unsigned long data);
  39
  40 static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val)
  41 {
  42         ak4117->write(ak4117->private_data, reg, val);
  43         if (reg < sizeof(ak4117->regmap))
  44                 ak4117->regmap[reg] = val;
  45 }
  46
  47 static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg)
  48 {
  49         return ak4117->read(ak4117->private_data, reg);
  50 }
  51
  52 #if 0
  53 static void reg_dump(struct ak4117 *ak4117)
  54 {
  55         int i;
  56
  57         printk(KERN_DEBUG "AK4117 REG DUMP:\n");
  58         for (i = 0; i < 0x1b; i++)
  59                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0);
  60 }
  61 #endif
  62
  63 static void snd_ak4117_free(struct ak4117 *chip)
  64 {
  65         del_timer_sync(&chip->timer);
  66         kfree(chip);
  67 }
  68
  69 static int snd_ak4117_dev_free(struct snd_device *device)
  70 {
  71         struct ak4117 *chip = device->device_data;
  72         snd_ak4117_free(chip);
  73         return 0;
  74 }
  75
  76 int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write,
  77                       const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117)
  78 {
  79         struct ak4117 *chip;
  80         int err = 0;
  81         unsigned char reg;
  82         static struct snd_device_ops ops = {
  83                 .dev_free =     snd_ak4117_dev_free,
  84         };
  85
  86         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  87         if (chip == NULL)
  88                 return -ENOMEM;
  89         spin_lock_init(&chip->lock);
  90         chip->card = card;
  91         chip->read = read;
  92         chip->write = write;
  93         chip->private_data = private_data;
  94         init_timer(&chip->timer);
  95         chip->timer.data = (unsigned long)chip;
  96         chip->timer.function = snd_ak4117_timer;
  97
  98         for (reg = 0; reg < 5; reg++)
  99                 chip->regmap[reg] = pgm[reg];
 100         snd_ak4117_reinit(chip);
 101
 102         chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 103         chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
 104         chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);
 105
 106         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
 107                 goto __fail;
 108
 109         if (r_ak4117)
 110                 *r_ak4117 = chip;
 111         return 0;
 112
 113       __fail:
 114         snd_ak4117_free(chip);
 115         return err < 0 ? err : -EIO;
 116 }
 117
 118 void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 119 {
 120         if (reg >= 5)
 121                 return;
 122         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 123 }
 124
 125 void snd_ak4117_reinit(struct ak4117 *chip)
 126 {
 127         unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
 128
 129         del_timer(&chip->timer);
 130         chip->init = 1;
 131         /* bring the chip to reset state and powerdown state */
 132         reg_write(chip, AK4117_REG_PWRDN, 0);
 133         udelay(200);
 134         /* release reset, but leave powerdown */
 135         reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
 136         udelay(200);
 137         for (reg = 1; reg < 5; reg++)
 138                 reg_write(chip, reg, chip->regmap[reg]);
 139         /* release powerdown, everything is initialized now */
 140         reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
 141         chip->init = 0;
 142         chip->timer.expires = 1 + jiffies;
 143         add_timer(&chip->timer);
 144 }
 145
 146 static unsigned int external_rate(unsigned char rcs1)
 147 {
 148         switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
 149         case AK4117_FS_32000HZ: return 32000;
 150         case AK4117_FS_44100HZ: return 44100;
 151         case AK4117_FS_48000HZ: return 48000;
 152         case AK4117_FS_88200HZ: return 88200;
 153         case AK4117_FS_96000HZ: return 96000;
 154         case AK4117_FS_176400HZ: return 176400;
 155         case AK4117_FS_192000HZ: return 192000;
 156         default:                return 0;
 157         }
 158 }
 159
 160 static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
 161                                     struct snd_ctl_elem_info *uinfo)
 162 {
 163         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 164         uinfo->count = 1;
 165         uinfo->value.integer.min = 0;
 166         uinfo->value.integer.max = LONG_MAX;
 167         return 0;
 168 }
 169
 170 static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
 171                                    struct snd_ctl_elem_value *ucontrol)
 172 {
 173         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 174         long *ptr;
 175
 176         spin_lock_irq(&chip->lock);
 177         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 178         ucontrol->value.integer.value[0] = *ptr;
 179         *ptr = 0;
 180         spin_unlock_irq(&chip->lock);
 181         return 0;
 182 }
 183
 184 #define snd_ak4117_in_bit_info          snd_ctl_boolean_mono_info
 185
 186 static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
 187                                  struct snd_ctl_elem_value *ucontrol)
 188 {
 189         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 190         unsigned char reg = kcontrol->private_value & 0xff;
 191         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 192         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 193
 194         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 195         return 0;
 196 }
 197
 198 static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
 199                               struct snd_ctl_elem_info *uinfo)
 200 {
 201         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 202         uinfo->count = 1;
 203         uinfo->value.integer.min = 0;
 204         uinfo->value.integer.max = 1;
 205         return 0;
 206 }
 207
 208 static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
 209                              struct snd_ctl_elem_value *ucontrol)
 210 {
 211         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 212
 213         ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
 214         return 0;
 215 }
 216
 217 static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
 218                              struct snd_ctl_elem_value *ucontrol)
 219 {
 220         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 221         int change;
 222         u8 old_val;
 223
 224         spin_lock_irq(&chip->lock);
 225         old_val = chip->regmap[AK4117_REG_IO];
 226         change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
 227         if (change)
 228                 reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
 229         spin_unlock_irq(&chip->lock);
 230         return change;
 231 }
 232
 233 static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
 234                                 struct snd_ctl_elem_info *uinfo)
 235 {
 236         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 237         uinfo->count = 1;
 238         uinfo->value.integer.min = 0;
 239         uinfo->value.integer.max = 192000;
 240         return 0;
 241 }
 242
 243 static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
 244                                struct snd_ctl_elem_value *ucontrol)
 245 {
 246         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 247
 248         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
 249         return 0;
 250 }
 251
 252 static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 253 {
 254         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 255         uinfo->count = 1;
 256         return 0;
 257 }
 258
 259 static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
 260                                 struct snd_ctl_elem_value *ucontrol)
 261 {
 262         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 263         unsigned i;
 264
 265         for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
 266                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
 267         return 0;
 268 }
 269
 270 static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 271 {
 272         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 273         uinfo->count = 1;
 274         return 0;
 275 }
 276
 277 static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
 278                                       struct snd_ctl_elem_value *ucontrol)
 279 {
 280         memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
 281         return 0;
 282 }
 283
 284 static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 285 {
 286         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 287         uinfo->value.integer.min = 0;
 288         uinfo->value.integer.max = 0xffff;
 289         uinfo->count = 4;
 290         return 0;
 291 }
 292
 293 static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
 294                                  struct snd_ctl_elem_value *ucontrol)
 295 {
 296         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 297         unsigned short tmp;
 298
 299         ucontrol->value.integer.value[0] = 0xf8f2;
 300         ucontrol->value.integer.value[1] = 0x4e1f;
 301         tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
 302         ucontrol->value.integer.value[2] = tmp;
 303         tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
 304         ucontrol->value.integer.value[3] = tmp;
 305         return 0;
 306 }
 307
 308 static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 309 {
 310         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 311         uinfo->count = AK4117_REG_QSUB_SIZE;
 312         return 0;
 313 }
 314
 315 static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
 316                                  struct snd_ctl_elem_value *ucontrol)
 317 {
 318         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 319         unsigned i;
 320
 321         for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
 322                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
 323         return 0;
 324 }
 325
 326 /* Don't forget to change AK4117_CONTROLS define!!! */
 327 static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
 328 {
 329         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 330         .name =         "IEC958 Parity Errors",
 331         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 332         .info =         snd_ak4117_in_error_info,
 333         .get =          snd_ak4117_in_error_get,
 334         .private_value = offsetof(struct ak4117, parity_errors),
 335 },
 336 {
 337         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 338         .name =         "IEC958 V-Bit Errors",
 339         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 340         .info =         snd_ak4117_in_error_info,
 341         .get =          snd_ak4117_in_error_get,
 342         .private_value = offsetof(struct ak4117, v_bit_errors),
 343 },
 344 {
 345         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 346         .name =         "IEC958 C-CRC Errors",
 347         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 348         .info =         snd_ak4117_in_error_info,
 349         .get =          snd_ak4117_in_error_get,
 350         .private_value = offsetof(struct ak4117, ccrc_errors),
 351 },
 352 {
 353         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 354         .name =         "IEC958 Q-CRC Errors",
 355         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 356         .info =         snd_ak4117_in_error_info,
 357         .get =          snd_ak4117_in_error_get,
 358         .private_value = offsetof(struct ak4117, qcrc_errors),
 359 },
 360 {
 361         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 362         .name =         "IEC958 External Rate",
 363         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 364         .info =         snd_ak4117_rate_info,
 365         .get =          snd_ak4117_rate_get,
 366 },
 367 {
 368         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 369         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 370         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 371         .info =         snd_ak4117_spdif_mask_info,
 372         .get =          snd_ak4117_spdif_mask_get,
 373 },
 374 {
 375         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 376         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 377         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 378         .info =         snd_ak4117_spdif_info,
 379         .get =          snd_ak4117_spdif_get,
 380 },
 381 {
 382         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 383         .name =         "IEC958 Preamble Capture Default",
 384         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 385         .info =         snd_ak4117_spdif_pinfo,
 386         .get =          snd_ak4117_spdif_pget,
 387 },
 388 {
 389         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 390         .name =         "IEC958 Q-subcode Capture Default",
 391         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 392         .info =         snd_ak4117_spdif_qinfo,
 393         .get =          snd_ak4117_spdif_qget,
 394 },
 395 {
 396         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 397         .name =         "IEC958 Audio",
 398         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 399         .info =         snd_ak4117_in_bit_info,
 400         .get =          snd_ak4117_in_bit_get,
 401         .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
 402 },
 403 {
 404         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 405         .name =         "IEC958 Non-PCM Bitstream",
 406         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 407         .info =         snd_ak4117_in_bit_info,
 408         .get =          snd_ak4117_in_bit_get,
 409         .private_value = (5<<8) | AK4117_REG_RCS1,
 410 },
 411 {
 412         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 413         .name =         "IEC958 DTS Bitstream",
 414         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 415         .info =         snd_ak4117_in_bit_info,
 416         .get =          snd_ak4117_in_bit_get,
 417         .private_value = (6<<8) | AK4117_REG_RCS1,
 418 },
 419 {
 420         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 421         .name =         "AK4117 Input Select",
 422         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
 423         .info =         snd_ak4117_rx_info,
 424         .get =          snd_ak4117_rx_get,
 425         .put =          snd_ak4117_rx_put,
 426 }
 427 };
 428
 429 int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
 430 {
 431         struct snd_kcontrol *kctl;
 432         unsigned int idx;
 433         int err;
 434
 435         if (snd_BUG_ON(!cap_substream))
 436                 return -EINVAL;
 437         ak4117->substream = cap_substream;
 438         for (idx = 0; idx < AK4117_CONTROLS; idx++) {
 439                 kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
 440                 if (kctl == NULL)
 441                         return -ENOMEM;
 442                 kctl->id.device = cap_substream->pcm->device;
 443                 kctl->id.subdevice = cap_substream->number;
 444                 err = snd_ctl_add(ak4117->card, kctl);
 445                 if (err < 0)
 446                         return err;
 447                 ak4117->kctls[idx] = kctl;
 448         }
 449         return 0;
 450 }
 451
 452 int snd_ak4117_external_rate(struct ak4117 *ak4117)
 453 {
 454         unsigned char rcs1;
 455
 456         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 457         return external_rate(rcs1);
 458 }
 459
 460 int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
 461 {
 462         struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
 463         unsigned long _flags;
 464         int res = 0;
 465         unsigned char rcs0, rcs1, rcs2;
 466         unsigned char c0, c1;
 467
 468         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 469         if (flags & AK4117_CHECK_NO_STAT)
 470                 goto __rate;
 471         rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
 472         rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
 473         // printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
 474         spin_lock_irqsave(&ak4117->lock, _flags);
 475         if (rcs0 & AK4117_PAR)
 476                 ak4117->parity_errors++;
 477         if (rcs0 & AK4117_V)
 478                 ak4117->v_bit_errors++;
 479         if (rcs2 & AK4117_CCRC)
 480                 ak4117->ccrc_errors++;
 481         if (rcs2 & AK4117_QCRC)
 482                 ak4117->qcrc_errors++;
 483         c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
 484                      (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
 485         c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
 486                      (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
 487         ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 488         ak4117->rcs1 = rcs1;
 489         ak4117->rcs2 = rcs2;
 490         spin_unlock_irqrestore(&ak4117->lock, _flags);
 491
 492         if (rcs0 & AK4117_PAR)
 493                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
 494         if (rcs0 & AK4117_V)
 495                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
 496         if (rcs2 & AK4117_CCRC)
 497                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
 498         if (rcs2 & AK4117_QCRC)
 499                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
 500
 501         /* rate change */
 502         if (c1 & 0x0f)
 503                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
 504
 505         if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
 506                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
 507         if (c0 & AK4117_QINT)
 508                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
 509
 510         if (c0 & AK4117_AUDION)
 511                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
 512         if (c1 & AK4117_NPCM)
 513                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
 514         if (c1 & AK4117_DTSCD)
 515                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
 516
 517         if (ak4117->change_callback && (c0 | c1) != 0)
 518                 ak4117->change_callback(ak4117, c0, c1);
 519
 520       __rate:
 521         /* compare rate */
 522         res = external_rate(rcs1);
 523         if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 524                 snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
 525                 if (snd_pcm_running(ak4117->substream)) {
 526                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 527                         snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
 528                         wake_up(&runtime->sleep);
 529                         res = 1;
 530                 }
 531                 snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
 532         }
 533         return res;
 534 }
 535
 536 static void snd_ak4117_timer(unsigned long data)
 537 {
 538         struct ak4117 *chip = (struct ak4117 *)data;
 539
 540         if (chip->init)
 541                 return;
 542         snd_ak4117_check_rate_and_errors(chip, 0);
 543         chip->timer.expires = 1 + jiffies;
 544         add_timer(&chip->timer);
 545 }
 546
 547 EXPORT_SYMBOL(snd_ak4117_create);
 548 EXPORT_SYMBOL(snd_ak4117_reg_write);
 549 EXPORT_SYMBOL(snd_ak4117_reinit);
 550 EXPORT_SYMBOL(snd_ak4117_build);
 551 EXPORT_SYMBOL(snd_ak4117_external_rate);
 552 EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);