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         timer_shutdown_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         err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
  90         if (err < 0)
  91                 goto __fail;
  92
  93         if (r_ak4117)
  94                 *r_ak4117 = chip;
  95         return 0;
  96
  97       __fail:
  98         snd_ak4117_free(chip);
  99         return err;
 100 }
 101
 102 void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 103 {
 104         if (reg >= 5)
 105                 return;
 106         reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 107 }
 108
 109 void snd_ak4117_reinit(struct ak4117 *chip)
 110 {
 111         unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
 112
 113         del_timer(&chip->timer);
 114         chip->init = 1;
 115         /* bring the chip to reset state and powerdown state */
 116         reg_write(chip, AK4117_REG_PWRDN, 0);
 117         udelay(200);
 118         /* release reset, but leave powerdown */
 119         reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
 120         udelay(200);
 121         for (reg = 1; reg < 5; reg++)
 122                 reg_write(chip, reg, chip->regmap[reg]);
 123         /* release powerdown, everything is initialized now */
 124         reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
 125         chip->init = 0;
 126         mod_timer(&chip->timer, 1 + jiffies);
 127 }
 128
 129 static unsigned int external_rate(unsigned char rcs1)
 130 {
 131         switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
 132         case AK4117_FS_32000HZ: return 32000;
 133         case AK4117_FS_44100HZ: return 44100;
 134         case AK4117_FS_48000HZ: return 48000;
 135         case AK4117_FS_88200HZ: return 88200;
 136         case AK4117_FS_96000HZ: return 96000;
 137         case AK4117_FS_176400HZ: return 176400;
 138         case AK4117_FS_192000HZ: return 192000;
 139         default:                return 0;
 140         }
 141 }
 142
 143 static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
 144                                     struct snd_ctl_elem_info *uinfo)
 145 {
 146         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 147         uinfo->count = 1;
 148         uinfo->value.integer.min = 0;
 149         uinfo->value.integer.max = LONG_MAX;
 150         return 0;
 151 }
 152
 153 static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
 154                                    struct snd_ctl_elem_value *ucontrol)
 155 {
 156         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 157
 158         spin_lock_irq(&chip->lock);
 159         ucontrol->value.integer.value[0] =
 160                        chip->errors[kcontrol->private_value];
 161         chip->errors[kcontrol->private_value] = 0;
 162         spin_unlock_irq(&chip->lock);
 163         return 0;
 164 }
 165
 166 #define snd_ak4117_in_bit_info          snd_ctl_boolean_mono_info
 167
 168 static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
 169                                  struct snd_ctl_elem_value *ucontrol)
 170 {
 171         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 172         unsigned char reg = kcontrol->private_value & 0xff;
 173         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 174         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 175
 176         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 177         return 0;
 178 }
 179
 180 static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
 181                               struct snd_ctl_elem_info *uinfo)
 182 {
 183         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 184         uinfo->count = 1;
 185         uinfo->value.integer.min = 0;
 186         uinfo->value.integer.max = 1;
 187         return 0;
 188 }
 189
 190 static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
 191                              struct snd_ctl_elem_value *ucontrol)
 192 {
 193         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 194
 195         ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
 196         return 0;
 197 }
 198
 199 static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
 200                              struct snd_ctl_elem_value *ucontrol)
 201 {
 202         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 203         int change;
 204         u8 old_val;
 205
 206         spin_lock_irq(&chip->lock);
 207         old_val = chip->regmap[AK4117_REG_IO];
 208         change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
 209         if (change)
 210                 reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
 211         spin_unlock_irq(&chip->lock);
 212         return change;
 213 }
 214
 215 static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
 216                                 struct snd_ctl_elem_info *uinfo)
 217 {
 218         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 219         uinfo->count = 1;
 220         uinfo->value.integer.min = 0;
 221         uinfo->value.integer.max = 192000;
 222         return 0;
 223 }
 224
 225 static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
 226                                struct snd_ctl_elem_value *ucontrol)
 227 {
 228         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 229
 230         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
 231         return 0;
 232 }
 233
 234 static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 235 {
 236         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 237         uinfo->count = 1;
 238         return 0;
 239 }
 240
 241 static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
 242                                 struct snd_ctl_elem_value *ucontrol)
 243 {
 244         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 245         unsigned i;
 246
 247         for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
 248                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
 249         return 0;
 250 }
 251
 252 static int snd_ak4117_spdif_mask_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_mask_get(struct snd_kcontrol *kcontrol,
 260                                       struct snd_ctl_elem_value *ucontrol)
 261 {
 262         memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
 263         return 0;
 264 }
 265
 266 static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 267 {
 268         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 269         uinfo->value.integer.min = 0;
 270         uinfo->value.integer.max = 0xffff;
 271         uinfo->count = 4;
 272         return 0;
 273 }
 274
 275 static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
 276                                  struct snd_ctl_elem_value *ucontrol)
 277 {
 278         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 279         unsigned short tmp;
 280
 281         ucontrol->value.integer.value[0] = 0xf8f2;
 282         ucontrol->value.integer.value[1] = 0x4e1f;
 283         tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
 284         ucontrol->value.integer.value[2] = tmp;
 285         tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
 286         ucontrol->value.integer.value[3] = tmp;
 287         return 0;
 288 }
 289
 290 static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 291 {
 292         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 293         uinfo->count = AK4117_REG_QSUB_SIZE;
 294         return 0;
 295 }
 296
 297 static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
 298                                  struct snd_ctl_elem_value *ucontrol)
 299 {
 300         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 301         unsigned i;
 302
 303         for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
 304                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
 305         return 0;
 306 }
 307
 308 /* Don't forget to change AK4117_CONTROLS define!!! */
 309 static const struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
 310 {
 311         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 312         .name =         "IEC958 Parity Errors",
 313         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 314         .info =         snd_ak4117_in_error_info,
 315         .get =          snd_ak4117_in_error_get,
 316         .private_value = AK4117_PARITY_ERRORS,
 317 },
 318 {
 319         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 320         .name =         "IEC958 V-Bit Errors",
 321         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 322         .info =         snd_ak4117_in_error_info,
 323         .get =          snd_ak4117_in_error_get,
 324         .private_value = AK4117_V_BIT_ERRORS,
 325 },
 326 {
 327         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 328         .name =         "IEC958 C-CRC Errors",
 329         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 330         .info =         snd_ak4117_in_error_info,
 331         .get =          snd_ak4117_in_error_get,
 332         .private_value = AK4117_CCRC_ERRORS,
 333 },
 334 {
 335         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 336         .name =         "IEC958 Q-CRC Errors",
 337         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 338         .info =         snd_ak4117_in_error_info,
 339         .get =          snd_ak4117_in_error_get,
 340         .private_value = AK4117_QCRC_ERRORS,
 341 },
 342 {
 343         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 344         .name =         "IEC958 External Rate",
 345         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 346         .info =         snd_ak4117_rate_info,
 347         .get =          snd_ak4117_rate_get,
 348 },
 349 {
 350         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 351         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 352         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 353         .info =         snd_ak4117_spdif_mask_info,
 354         .get =          snd_ak4117_spdif_mask_get,
 355 },
 356 {
 357         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 358         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 359         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 360         .info =         snd_ak4117_spdif_info,
 361         .get =          snd_ak4117_spdif_get,
 362 },
 363 {
 364         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 365         .name =         "IEC958 Preamble Capture Default",
 366         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 367         .info =         snd_ak4117_spdif_pinfo,
 368         .get =          snd_ak4117_spdif_pget,
 369 },
 370 {
 371         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 372         .name =         "IEC958 Q-subcode Capture Default",
 373         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 374         .info =         snd_ak4117_spdif_qinfo,
 375         .get =          snd_ak4117_spdif_qget,
 376 },
 377 {
 378         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 379         .name =         "IEC958 Audio",
 380         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 381         .info =         snd_ak4117_in_bit_info,
 382         .get =          snd_ak4117_in_bit_get,
 383         .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
 384 },
 385 {
 386         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 387         .name =         "IEC958 Non-PCM Bitstream",
 388         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 389         .info =         snd_ak4117_in_bit_info,
 390         .get =          snd_ak4117_in_bit_get,
 391         .private_value = (5<<8) | AK4117_REG_RCS1,
 392 },
 393 {
 394         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 395         .name =         "IEC958 DTS Bitstream",
 396         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 397         .info =         snd_ak4117_in_bit_info,
 398         .get =          snd_ak4117_in_bit_get,
 399         .private_value = (6<<8) | AK4117_REG_RCS1,
 400 },
 401 {
 402         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 403         .name =         "AK4117 Input Select",
 404         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
 405         .info =         snd_ak4117_rx_info,
 406         .get =          snd_ak4117_rx_get,
 407         .put =          snd_ak4117_rx_put,
 408 }
 409 };
 410
 411 int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
 412 {
 413         struct snd_kcontrol *kctl;
 414         unsigned int idx;
 415         int err;
 416
 417         if (snd_BUG_ON(!cap_substream))
 418                 return -EINVAL;
 419         ak4117->substream = cap_substream;
 420         for (idx = 0; idx < AK4117_CONTROLS; idx++) {
 421                 kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
 422                 if (kctl == NULL)
 423                         return -ENOMEM;
 424                 kctl->id.device = cap_substream->pcm->device;
 425                 kctl->id.subdevice = cap_substream->number;
 426                 err = snd_ctl_add(ak4117->card, kctl);
 427                 if (err < 0)
 428                         return err;
 429                 ak4117->kctls[idx] = kctl;
 430         }
 431         return 0;
 432 }
 433
 434 int snd_ak4117_external_rate(struct ak4117 *ak4117)
 435 {
 436         unsigned char rcs1;
 437
 438         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 439         return external_rate(rcs1);
 440 }
 441
 442 int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
 443 {
 444         struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
 445         unsigned long _flags;
 446         int res = 0;
 447         unsigned char rcs0, rcs1, rcs2;
 448         unsigned char c0, c1;
 449
 450         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 451         if (flags & AK4117_CHECK_NO_STAT)
 452                 goto __rate;
 453         rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
 454         rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
 455         // printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
 456         spin_lock_irqsave(&ak4117->lock, _flags);
 457         if (rcs0 & AK4117_PAR)
 458                 ak4117->errors[AK4117_PARITY_ERRORS]++;
 459         if (rcs0 & AK4117_V)
 460                 ak4117->errors[AK4117_V_BIT_ERRORS]++;
 461         if (rcs2 & AK4117_CCRC)
 462                 ak4117->errors[AK4117_CCRC_ERRORS]++;
 463         if (rcs2 & AK4117_QCRC)
 464                 ak4117->errors[AK4117_QCRC_ERRORS]++;
 465         c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
 466                      (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
 467         c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
 468                      (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
 469         ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 470         ak4117->rcs1 = rcs1;
 471         ak4117->rcs2 = rcs2;
 472         spin_unlock_irqrestore(&ak4117->lock, _flags);
 473
 474         if (rcs0 & AK4117_PAR)
 475                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
 476         if (rcs0 & AK4117_V)
 477                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
 478         if (rcs2 & AK4117_CCRC)
 479                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
 480         if (rcs2 & AK4117_QCRC)
 481                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
 482
 483         /* rate change */
 484         if (c1 & 0x0f)
 485                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
 486
 487         if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
 488                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
 489         if (c0 & AK4117_QINT)
 490                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
 491
 492         if (c0 & AK4117_AUDION)
 493                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
 494         if (c1 & AK4117_NPCM)
 495                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
 496         if (c1 & AK4117_DTSCD)
 497                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
 498
 499         if (ak4117->change_callback && (c0 | c1) != 0)
 500                 ak4117->change_callback(ak4117, c0, c1);
 501
 502       __rate:
 503         /* compare rate */
 504         res = external_rate(rcs1);
 505         if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 506                 snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
 507                 if (snd_pcm_running(ak4117->substream)) {
 508                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 509                         snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
 510                         wake_up(&runtime->sleep);
 511                         res = 1;
 512                 }
 513                 snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
 514         }
 515         return res;
 516 }
 517
 518 static void snd_ak4117_timer(struct timer_list *t)
 519 {
 520         struct ak4117 *chip = from_timer(chip, t, timer);
 521
 522         if (chip->init)
 523                 return;
 524         snd_ak4117_check_rate_and_errors(chip, 0);
 525         mod_timer(&chip->timer, 1 + jiffies);
 526 }
 527
 528 EXPORT_SYMBOL(snd_ak4117_create);
 529 EXPORT_SYMBOL(snd_ak4117_reg_write);
 530 EXPORT_SYMBOL(snd_ak4117_reinit);
 531 EXPORT_SYMBOL(snd_ak4117_build);
 532 EXPORT_SYMBOL(snd_ak4117_external_rate);
 533 EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);