kernel/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         setup_timer(&chip->timer, snd_ak4117_timer, (unsigned long)chip);
  95
  96         for (reg = 0; reg < 5; reg++)
  97                 chip->regmap[reg] = pgm[reg];
  98         snd_ak4117_reinit(chip);
  99
 100         chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 101         chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
 102         chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);
 103
 104         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
 105                 goto __fail;
 106
 107         if (r_ak4117)
 108                 *r_ak4117 = chip;
 109         return 0;
 110
 111       __fail:
 112         snd_ak4117_free(chip);
 113         return err < 0 ? err : -EIO;
 114 }
 115
 116 void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 117 {
 118         if (reg >= 5)
 119                 return;
 120         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 121 }
 122
 123 void snd_ak4117_reinit(struct ak4117 *chip)
 124 {
 125         unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
 126
 127         del_timer(&chip->timer);
 128         chip->init = 1;
 129         /* bring the chip to reset state and powerdown state */
 130         reg_write(chip, AK4117_REG_PWRDN, 0);
 131         udelay(200);
 132         /* release reset, but leave powerdown */
 133         reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
 134         udelay(200);
 135         for (reg = 1; reg < 5; reg++)
 136                 reg_write(chip, reg, chip->regmap[reg]);
 137         /* release powerdown, everything is initialized now */
 138         reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
 139         chip->init = 0;
 140         mod_timer(&chip->timer, 1 + jiffies);
 141 }
 142
 143 static unsigned int external_rate(unsigned char rcs1)
 144 {
 145         switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
 146         case AK4117_FS_32000HZ: return 32000;
 147         case AK4117_FS_44100HZ: return 44100;
 148         case AK4117_FS_48000HZ: return 48000;
 149         case AK4117_FS_88200HZ: return 88200;
 150         case AK4117_FS_96000HZ: return 96000;
 151         case AK4117_FS_176400HZ: return 176400;
 152         case AK4117_FS_192000HZ: return 192000;
 153         default:                return 0;
 154         }
 155 }
 156
 157 static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
 158                                     struct snd_ctl_elem_info *uinfo)
 159 {
 160         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 161         uinfo->count = 1;
 162         uinfo->value.integer.min = 0;
 163         uinfo->value.integer.max = LONG_MAX;
 164         return 0;
 165 }
 166
 167 static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
 168                                    struct snd_ctl_elem_value *ucontrol)
 169 {
 170         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 171         long *ptr;
 172
 173         spin_lock_irq(&chip->lock);
 174         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 175         ucontrol->value.integer.value[0] = *ptr;
 176         *ptr = 0;
 177         spin_unlock_irq(&chip->lock);
 178         return 0;
 179 }
 180
 181 #define snd_ak4117_in_bit_info          snd_ctl_boolean_mono_info
 182
 183 static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
 184                                  struct snd_ctl_elem_value *ucontrol)
 185 {
 186         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 187         unsigned char reg = kcontrol->private_value & 0xff;
 188         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 189         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 190
 191         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 192         return 0;
 193 }
 194
 195 static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
 196                               struct snd_ctl_elem_info *uinfo)
 197 {
 198         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 199         uinfo->count = 1;
 200         uinfo->value.integer.min = 0;
 201         uinfo->value.integer.max = 1;
 202         return 0;
 203 }
 204
 205 static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
 206                              struct snd_ctl_elem_value *ucontrol)
 207 {
 208         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 209
 210         ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
 211         return 0;
 212 }
 213
 214 static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
 215                              struct snd_ctl_elem_value *ucontrol)
 216 {
 217         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 218         int change;
 219         u8 old_val;
 220
 221         spin_lock_irq(&chip->lock);
 222         old_val = chip->regmap[AK4117_REG_IO];
 223         change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
 224         if (change)
 225                 reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
 226         spin_unlock_irq(&chip->lock);
 227         return change;
 228 }
 229
 230 static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
 231                                 struct snd_ctl_elem_info *uinfo)
 232 {
 233         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 234         uinfo->count = 1;
 235         uinfo->value.integer.min = 0;
 236         uinfo->value.integer.max = 192000;
 237         return 0;
 238 }
 239
 240 static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
 241                                struct snd_ctl_elem_value *ucontrol)
 242 {
 243         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 244
 245         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
 246         return 0;
 247 }
 248
 249 static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 250 {
 251         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 252         uinfo->count = 1;
 253         return 0;
 254 }
 255
 256 static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
 257                                 struct snd_ctl_elem_value *ucontrol)
 258 {
 259         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 260         unsigned i;
 261
 262         for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
 263                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
 264         return 0;
 265 }
 266
 267 static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 268 {
 269         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 270         uinfo->count = 1;
 271         return 0;
 272 }
 273
 274 static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
 275                                       struct snd_ctl_elem_value *ucontrol)
 276 {
 277         memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
 278         return 0;
 279 }
 280
 281 static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 282 {
 283         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 284         uinfo->value.integer.min = 0;
 285         uinfo->value.integer.max = 0xffff;
 286         uinfo->count = 4;
 287         return 0;
 288 }
 289
 290 static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
 291                                  struct snd_ctl_elem_value *ucontrol)
 292 {
 293         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 294         unsigned short tmp;
 295
 296         ucontrol->value.integer.value[0] = 0xf8f2;
 297         ucontrol->value.integer.value[1] = 0x4e1f;
 298         tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
 299         ucontrol->value.integer.value[2] = tmp;
 300         tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
 301         ucontrol->value.integer.value[3] = tmp;
 302         return 0;
 303 }
 304
 305 static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 306 {
 307         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 308         uinfo->count = AK4117_REG_QSUB_SIZE;
 309         return 0;
 310 }
 311
 312 static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
 313                                  struct snd_ctl_elem_value *ucontrol)
 314 {
 315         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 316         unsigned i;
 317
 318         for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
 319                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
 320         return 0;
 321 }
 322
 323 /* Don't forget to change AK4117_CONTROLS define!!! */
 324 static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
 325 {
 326         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 327         .name =         "IEC958 Parity Errors",
 328         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 329         .info =         snd_ak4117_in_error_info,
 330         .get =          snd_ak4117_in_error_get,
 331         .private_value = offsetof(struct ak4117, parity_errors),
 332 },
 333 {
 334         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 335         .name =         "IEC958 V-Bit Errors",
 336         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 337         .info =         snd_ak4117_in_error_info,
 338         .get =          snd_ak4117_in_error_get,
 339         .private_value = offsetof(struct ak4117, v_bit_errors),
 340 },
 341 {
 342         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 343         .name =         "IEC958 C-CRC Errors",
 344         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 345         .info =         snd_ak4117_in_error_info,
 346         .get =          snd_ak4117_in_error_get,
 347         .private_value = offsetof(struct ak4117, ccrc_errors),
 348 },
 349 {
 350         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 351         .name =         "IEC958 Q-CRC Errors",
 352         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 353         .info =         snd_ak4117_in_error_info,
 354         .get =          snd_ak4117_in_error_get,
 355         .private_value = offsetof(struct ak4117, qcrc_errors),
 356 },
 357 {
 358         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 359         .name =         "IEC958 External Rate",
 360         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 361         .info =         snd_ak4117_rate_info,
 362         .get =          snd_ak4117_rate_get,
 363 },
 364 {
 365         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 366         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 367         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 368         .info =         snd_ak4117_spdif_mask_info,
 369         .get =          snd_ak4117_spdif_mask_get,
 370 },
 371 {
 372         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 373         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 374         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 375         .info =         snd_ak4117_spdif_info,
 376         .get =          snd_ak4117_spdif_get,
 377 },
 378 {
 379         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 380         .name =         "IEC958 Preamble Capture Default",
 381         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 382         .info =         snd_ak4117_spdif_pinfo,
 383         .get =          snd_ak4117_spdif_pget,
 384 },
 385 {
 386         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 387         .name =         "IEC958 Q-subcode Capture Default",
 388         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 389         .info =         snd_ak4117_spdif_qinfo,
 390         .get =          snd_ak4117_spdif_qget,
 391 },
 392 {
 393         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 394         .name =         "IEC958 Audio",
 395         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 396         .info =         snd_ak4117_in_bit_info,
 397         .get =          snd_ak4117_in_bit_get,
 398         .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
 399 },
 400 {
 401         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 402         .name =         "IEC958 Non-PCM Bitstream",
 403         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 404         .info =         snd_ak4117_in_bit_info,
 405         .get =          snd_ak4117_in_bit_get,
 406         .private_value = (5<<8) | AK4117_REG_RCS1,
 407 },
 408 {
 409         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 410         .name =         "IEC958 DTS Bitstream",
 411         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 412         .info =         snd_ak4117_in_bit_info,
 413         .get =          snd_ak4117_in_bit_get,
 414         .private_value = (6<<8) | AK4117_REG_RCS1,
 415 },
 416 {
 417         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 418         .name =         "AK4117 Input Select",
 419         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
 420         .info =         snd_ak4117_rx_info,
 421         .get =          snd_ak4117_rx_get,
 422         .put =          snd_ak4117_rx_put,
 423 }
 424 };
 425
 426 int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
 427 {
 428         struct snd_kcontrol *kctl;
 429         unsigned int idx;
 430         int err;
 431
 432         if (snd_BUG_ON(!cap_substream))
 433                 return -EINVAL;
 434         ak4117->substream = cap_substream;
 435         for (idx = 0; idx < AK4117_CONTROLS; idx++) {
 436                 kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
 437                 if (kctl == NULL)
 438                         return -ENOMEM;
 439                 kctl->id.device = cap_substream->pcm->device;
 440                 kctl->id.subdevice = cap_substream->number;
 441                 err = snd_ctl_add(ak4117->card, kctl);
 442                 if (err < 0)
 443                         return err;
 444                 ak4117->kctls[idx] = kctl;
 445         }
 446         return 0;
 447 }
 448
 449 int snd_ak4117_external_rate(struct ak4117 *ak4117)
 450 {
 451         unsigned char rcs1;
 452
 453         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 454         return external_rate(rcs1);
 455 }
 456
 457 int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
 458 {
 459         struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
 460         unsigned long _flags;
 461         int res = 0;
 462         unsigned char rcs0, rcs1, rcs2;
 463         unsigned char c0, c1;
 464
 465         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 466         if (flags & AK4117_CHECK_NO_STAT)
 467                 goto __rate;
 468         rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
 469         rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
 470         // printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
 471         spin_lock_irqsave(&ak4117->lock, _flags);
 472         if (rcs0 & AK4117_PAR)
 473                 ak4117->parity_errors++;
 474         if (rcs0 & AK4117_V)
 475                 ak4117->v_bit_errors++;
 476         if (rcs2 & AK4117_CCRC)
 477                 ak4117->ccrc_errors++;
 478         if (rcs2 & AK4117_QCRC)
 479                 ak4117->qcrc_errors++;
 480         c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
 481                      (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
 482         c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
 483                      (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
 484         ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 485         ak4117->rcs1 = rcs1;
 486         ak4117->rcs2 = rcs2;
 487         spin_unlock_irqrestore(&ak4117->lock, _flags);
 488
 489         if (rcs0 & AK4117_PAR)
 490                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
 491         if (rcs0 & AK4117_V)
 492                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
 493         if (rcs2 & AK4117_CCRC)
 494                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
 495         if (rcs2 & AK4117_QCRC)
 496                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
 497
 498         /* rate change */
 499         if (c1 & 0x0f)
 500                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
 501
 502         if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
 503                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
 504         if (c0 & AK4117_QINT)
 505                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
 506
 507         if (c0 & AK4117_AUDION)
 508                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
 509         if (c1 & AK4117_NPCM)
 510                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
 511         if (c1 & AK4117_DTSCD)
 512                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
 513
 514         if (ak4117->change_callback && (c0 | c1) != 0)
 515                 ak4117->change_callback(ak4117, c0, c1);
 516
 517       __rate:
 518         /* compare rate */
 519         res = external_rate(rcs1);
 520         if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 521                 snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
 522                 if (snd_pcm_running(ak4117->substream)) {
 523                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 524                         snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
 525                         wake_up(&runtime->sleep);
 526                         res = 1;
 527                 }
 528                 snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
 529         }
 530         return res;
 531 }
 532
 533 static void snd_ak4117_timer(unsigned long data)
 534 {
 535         struct ak4117 *chip = (struct ak4117 *)data;
 536
 537         if (chip->init)
 538                 return;
 539         snd_ak4117_check_rate_and_errors(chip, 0);
 540         mod_timer(&chip->timer, 1 + jiffies);
 541 }
 542
 543 EXPORT_SYMBOL(snd_ak4117_create);
 544 EXPORT_SYMBOL(snd_ak4117_reg_write);
 545 EXPORT_SYMBOL(snd_ak4117_reinit);
 546 EXPORT_SYMBOL(snd_ak4117_build);
 547 EXPORT_SYMBOL(snd_ak4117_external_rate);
 548 EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);