sound/i2c/other/ak4117.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Routines for control of the AK4117 via 4-wire serial interface
   4  *  IEC958 (S/PDIF) receiver by Asahi Kasei
   5  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   6  */
   7
   8 #include <linux/slab.h>
   9 #include <linux/delay.h>
  10 #include <linux/module.h>
  11 #include <sound/core.h>
  12 #include <sound/control.h>
  13 #include <sound/pcm.h>
  14 #include <sound/ak4117.h>
  15 #include <sound/asoundef.h>
  16
  17 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  18 MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei");
  19 MODULE_LICENSE("GPL");
  20
  21 #define AK4117_ADDR                     0x00 /* fixed address */
  22
  23 static void snd_ak4117_timer(struct timer_list *t);
  24
  25 static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val)
  26 {
  27         ak4117->write(ak4117->private_data, reg, val);
  28         if (reg < sizeof(ak4117->regmap))
  29                 ak4117->regmap[reg] = val;
  30 }
  31
  32 static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg)
  33 {
  34         return ak4117->read(ak4117->private_data, reg);
  35 }
  36
  37 #if 0
  38 static void reg_dump(struct ak4117 *ak4117)
  39 {
  40         int i;
  41
  42         printk(KERN_DEBUG "AK4117 REG DUMP:\n");
  43         for (i = 0; i < 0x1b; i++)
  44                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0);
  45 }
  46 #endif
  47
  48 static void snd_ak4117_free(struct ak4117 *chip)
  49 {
  50         del_timer_sync(&chip->timer);
  51         kfree(chip);
  52 }
  53
  54 static int snd_ak4117_dev_free(struct snd_device *device)
  55 {
  56         struct ak4117 *chip = device->device_data;
  57         snd_ak4117_free(chip);
  58         return 0;
  59 }
  60
  61 int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write,
  62                       const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117)
  63 {
  64         struct ak4117 *chip;
  65         int err = 0;
  66         unsigned char reg;
  67         static const struct snd_device_ops ops = {
  68                 .dev_free =     snd_ak4117_dev_free,
  69         };
  70
  71         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  72         if (chip == NULL)
  73                 return -ENOMEM;
  74         spin_lock_init(&chip->lock);
  75         chip->card = card;
  76         chip->read = read;
  77         chip->write = write;
  78         chip->private_data = private_data;
  79         timer_setup(&chip->timer, snd_ak4117_timer, 0);
  80
  81         for (reg = 0; reg < 5; reg++)
  82                 chip->regmap[reg] = pgm[reg];
  83         snd_ak4117_reinit(chip);
  84
  85         chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
  86         chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
  87         chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);
  88
  89         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
  90                 goto __fail;
  91
  92         if (r_ak4117)
  93                 *r_ak4117 = chip;
  94         return 0;
  95
  96       __fail:
  97         snd_ak4117_free(chip);
  98         return err;
  99 }
 100
 101 void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 102 {
 103         if (reg >= 5)
 104                 return;
 105         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 106 }
 107
 108 void snd_ak4117_reinit(struct ak4117 *chip)
 109 {
 110         unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
 111
 112         del_timer(&chip->timer);
 113         chip->init = 1;
 114         /* bring the chip to reset state and powerdown state */
 115         reg_write(chip, AK4117_REG_PWRDN, 0);
 116         udelay(200);
 117         /* release reset, but leave powerdown */
 118         reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
 119         udelay(200);
 120         for (reg = 1; reg < 5; reg++)
 121                 reg_write(chip, reg, chip->regmap[reg]);
 122         /* release powerdown, everything is initialized now */
 123         reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
 124         chip->init = 0;
 125         mod_timer(&chip->timer, 1 + jiffies);
 126 }
 127
 128 static unsigned int external_rate(unsigned char rcs1)
 129 {
 130         switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
 131         case AK4117_FS_32000HZ: return 32000;
 132         case AK4117_FS_44100HZ: return 44100;
 133         case AK4117_FS_48000HZ: return 48000;
 134         case AK4117_FS_88200HZ: return 88200;
 135         case AK4117_FS_96000HZ: return 96000;
 136         case AK4117_FS_176400HZ: return 176400;
 137         case AK4117_FS_192000HZ: return 192000;
 138         default:                return 0;
 139         }
 140 }
 141
 142 static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
 143                                     struct snd_ctl_elem_info *uinfo)
 144 {
 145         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 146         uinfo->count = 1;
 147         uinfo->value.integer.min = 0;
 148         uinfo->value.integer.max = LONG_MAX;
 149         return 0;
 150 }
 151
 152 static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
 153                                    struct snd_ctl_elem_value *ucontrol)
 154 {
 155         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 156
 157         spin_lock_irq(&chip->lock);
 158         ucontrol->value.integer.value[0] =
 159                        chip->errors[kcontrol->private_value];
 160         chip->errors[kcontrol->private_value] = 0;
 161         spin_unlock_irq(&chip->lock);
 162         return 0;
 163 }
 164
 165 #define snd_ak4117_in_bit_info          snd_ctl_boolean_mono_info
 166
 167 static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
 168                                  struct snd_ctl_elem_value *ucontrol)
 169 {
 170         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 171         unsigned char reg = kcontrol->private_value & 0xff;
 172         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 173         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 174
 175         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 176         return 0;
 177 }
 178
 179 static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
 180                               struct snd_ctl_elem_info *uinfo)
 181 {
 182         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 183         uinfo->count = 1;
 184         uinfo->value.integer.min = 0;
 185         uinfo->value.integer.max = 1;
 186         return 0;
 187 }
 188
 189 static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
 190                              struct snd_ctl_elem_value *ucontrol)
 191 {
 192         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 193
 194         ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
 195         return 0;
 196 }
 197
 198 static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
 199                              struct snd_ctl_elem_value *ucontrol)
 200 {
 201         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 202         int change;
 203         u8 old_val;
 204
 205         spin_lock_irq(&chip->lock);
 206         old_val = chip->regmap[AK4117_REG_IO];
 207         change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
 208         if (change)
 209                 reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
 210         spin_unlock_irq(&chip->lock);
 211         return change;
 212 }
 213
 214 static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
 215                                 struct snd_ctl_elem_info *uinfo)
 216 {
 217         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 218         uinfo->count = 1;
 219         uinfo->value.integer.min = 0;
 220         uinfo->value.integer.max = 192000;
 221         return 0;
 222 }
 223
 224 static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
 225                                struct snd_ctl_elem_value *ucontrol)
 226 {
 227         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 228
 229         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
 230         return 0;
 231 }
 232
 233 static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 234 {
 235         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 236         uinfo->count = 1;
 237         return 0;
 238 }
 239
 240 static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
 241                                 struct snd_ctl_elem_value *ucontrol)
 242 {
 243         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 244         unsigned i;
 245
 246         for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
 247                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
 248         return 0;
 249 }
 250
 251 static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 252 {
 253         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 254         uinfo->count = 1;
 255         return 0;
 256 }
 257
 258 static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
 259                                       struct snd_ctl_elem_value *ucontrol)
 260 {
 261         memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
 262         return 0;
 263 }
 264
 265 static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 266 {
 267         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 268         uinfo->value.integer.min = 0;
 269         uinfo->value.integer.max = 0xffff;
 270         uinfo->count = 4;
 271         return 0;
 272 }
 273
 274 static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
 275                                  struct snd_ctl_elem_value *ucontrol)
 276 {
 277         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 278         unsigned short tmp;
 279
 280         ucontrol->value.integer.value[0] = 0xf8f2;
 281         ucontrol->value.integer.value[1] = 0x4e1f;
 282         tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
 283         ucontrol->value.integer.value[2] = tmp;
 284         tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
 285         ucontrol->value.integer.value[3] = tmp;
 286         return 0;
 287 }
 288
 289 static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 290 {
 291         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 292         uinfo->count = AK4117_REG_QSUB_SIZE;
 293         return 0;
 294 }
 295
 296 static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
 297                                  struct snd_ctl_elem_value *ucontrol)
 298 {
 299         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 300         unsigned i;
 301
 302         for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
 303                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
 304         return 0;
 305 }
 306
 307 /* Don't forget to change AK4117_CONTROLS define!!! */
 308 static const struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
 309 {
 310         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 311         .name =         "IEC958 Parity Errors",
 312         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 313         .info =         snd_ak4117_in_error_info,
 314         .get =          snd_ak4117_in_error_get,
 315         .private_value = AK4117_PARITY_ERRORS,
 316 },
 317 {
 318         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 319         .name =         "IEC958 V-Bit Errors",
 320         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 321         .info =         snd_ak4117_in_error_info,
 322         .get =          snd_ak4117_in_error_get,
 323         .private_value = AK4117_V_BIT_ERRORS,
 324 },
 325 {
 326         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 327         .name =         "IEC958 C-CRC 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 = AK4117_CCRC_ERRORS,
 332 },
 333 {
 334         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 335         .name =         "IEC958 Q-CRC 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 = AK4117_QCRC_ERRORS,
 340 },
 341 {
 342         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 343         .name =         "IEC958 External Rate",
 344         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 345         .info =         snd_ak4117_rate_info,
 346         .get =          snd_ak4117_rate_get,
 347 },
 348 {
 349         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 350         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 351         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 352         .info =         snd_ak4117_spdif_mask_info,
 353         .get =          snd_ak4117_spdif_mask_get,
 354 },
 355 {
 356         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 357         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 358         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 359         .info =         snd_ak4117_spdif_info,
 360         .get =          snd_ak4117_spdif_get,
 361 },
 362 {
 363         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 364         .name =         "IEC958 Preamble Capture Default",
 365         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 366         .info =         snd_ak4117_spdif_pinfo,
 367         .get =          snd_ak4117_spdif_pget,
 368 },
 369 {
 370         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 371         .name =         "IEC958 Q-subcode Capture Default",
 372         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 373         .info =         snd_ak4117_spdif_qinfo,
 374         .get =          snd_ak4117_spdif_qget,
 375 },
 376 {
 377         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 378         .name =         "IEC958 Audio",
 379         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 380         .info =         snd_ak4117_in_bit_info,
 381         .get =          snd_ak4117_in_bit_get,
 382         .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
 383 },
 384 {
 385         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 386         .name =         "IEC958 Non-PCM Bitstream",
 387         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 388         .info =         snd_ak4117_in_bit_info,
 389         .get =          snd_ak4117_in_bit_get,
 390         .private_value = (5<<8) | AK4117_REG_RCS1,
 391 },
 392 {
 393         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 394         .name =         "IEC958 DTS Bitstream",
 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 = (6<<8) | AK4117_REG_RCS1,
 399 },
 400 {
 401         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 402         .name =         "AK4117 Input Select",
 403         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
 404         .info =         snd_ak4117_rx_info,
 405         .get =          snd_ak4117_rx_get,
 406         .put =          snd_ak4117_rx_put,
 407 }
 408 };
 409
 410 int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
 411 {
 412         struct snd_kcontrol *kctl;
 413         unsigned int idx;
 414         int err;
 415
 416         if (snd_BUG_ON(!cap_substream))
 417                 return -EINVAL;
 418         ak4117->substream = cap_substream;
 419         for (idx = 0; idx < AK4117_CONTROLS; idx++) {
 420                 kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
 421                 if (kctl == NULL)
 422                         return -ENOMEM;
 423                 kctl->id.device = cap_substream->pcm->device;
 424                 kctl->id.subdevice = cap_substream->number;
 425                 err = snd_ctl_add(ak4117->card, kctl);
 426                 if (err < 0)
 427                         return err;
 428                 ak4117->kctls[idx] = kctl;
 429         }
 430         return 0;
 431 }
 432
 433 int snd_ak4117_external_rate(struct ak4117 *ak4117)
 434 {
 435         unsigned char rcs1;
 436
 437         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 438         return external_rate(rcs1);
 439 }
 440
 441 int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
 442 {
 443         struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
 444         unsigned long _flags;
 445         int res = 0;
 446         unsigned char rcs0, rcs1, rcs2;
 447         unsigned char c0, c1;
 448
 449         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 450         if (flags & AK4117_CHECK_NO_STAT)
 451                 goto __rate;
 452         rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
 453         rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
 454         // printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
 455         spin_lock_irqsave(&ak4117->lock, _flags);
 456         if (rcs0 & AK4117_PAR)
 457                 ak4117->errors[AK4117_PARITY_ERRORS]++;
 458         if (rcs0 & AK4117_V)
 459                 ak4117->errors[AK4117_V_BIT_ERRORS]++;
 460         if (rcs2 & AK4117_CCRC)
 461                 ak4117->errors[AK4117_CCRC_ERRORS]++;
 462         if (rcs2 & AK4117_QCRC)
 463                 ak4117->errors[AK4117_QCRC_ERRORS]++;
 464         c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
 465                      (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
 466         c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
 467                      (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
 468         ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 469         ak4117->rcs1 = rcs1;
 470         ak4117->rcs2 = rcs2;
 471         spin_unlock_irqrestore(&ak4117->lock, _flags);
 472
 473         if (rcs0 & AK4117_PAR)
 474                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
 475         if (rcs0 & AK4117_V)
 476                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
 477         if (rcs2 & AK4117_CCRC)
 478                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
 479         if (rcs2 & AK4117_QCRC)
 480                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
 481
 482         /* rate change */
 483         if (c1 & 0x0f)
 484                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
 485
 486         if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
 487                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
 488         if (c0 & AK4117_QINT)
 489                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
 490
 491         if (c0 & AK4117_AUDION)
 492                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
 493         if (c1 & AK4117_NPCM)
 494                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
 495         if (c1 & AK4117_DTSCD)
 496                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
 497
 498         if (ak4117->change_callback && (c0 | c1) != 0)
 499                 ak4117->change_callback(ak4117, c0, c1);
 500
 501       __rate:
 502         /* compare rate */
 503         res = external_rate(rcs1);
 504         if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 505                 snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
 506                 if (snd_pcm_running(ak4117->substream)) {
 507                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 508                         snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
 509                         wake_up(&runtime->sleep);
 510                         res = 1;
 511                 }
 512                 snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
 513         }
 514         return res;
 515 }
 516
 517 static void snd_ak4117_timer(struct timer_list *t)
 518 {
 519         struct ak4117 *chip = from_timer(chip, t, timer);
 520
 521         if (chip->init)
 522                 return;
 523         snd_ak4117_check_rate_and_errors(chip, 0);
 524         mod_timer(&chip->timer, 1 + jiffies);
 525 }
 526
 527 EXPORT_SYMBOL(snd_ak4117_create);
 528 EXPORT_SYMBOL(snd_ak4117_reg_write);
 529 EXPORT_SYMBOL(snd_ak4117_reinit);
 530 EXPORT_SYMBOL(snd_ak4117_build);
 531 EXPORT_SYMBOL(snd_ak4117_external_rate);
 532 EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);