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(struct timer_list *t);
  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         timer_setup(&chip->timer, snd_ak4117_timer, 0);
  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;
 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
 172         spin_lock_irq(&chip->lock);
 173         ucontrol->value.integer.value[0] =
 174                        chip->errors[kcontrol->private_value];
 175         chip->errors[kcontrol->private_value] = 0;
 176         spin_unlock_irq(&chip->lock);
 177         return 0;
 178 }
 179
 180 #define snd_ak4117_in_bit_info          snd_ctl_boolean_mono_info
 181
 182 static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
 183                                  struct snd_ctl_elem_value *ucontrol)
 184 {
 185         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 186         unsigned char reg = kcontrol->private_value & 0xff;
 187         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 188         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 189
 190         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 191         return 0;
 192 }
 193
 194 static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
 195                               struct snd_ctl_elem_info *uinfo)
 196 {
 197         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 198         uinfo->count = 1;
 199         uinfo->value.integer.min = 0;
 200         uinfo->value.integer.max = 1;
 201         return 0;
 202 }
 203
 204 static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
 205                              struct snd_ctl_elem_value *ucontrol)
 206 {
 207         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 208
 209         ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
 210         return 0;
 211 }
 212
 213 static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
 214                              struct snd_ctl_elem_value *ucontrol)
 215 {
 216         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 217         int change;
 218         u8 old_val;
 219
 220         spin_lock_irq(&chip->lock);
 221         old_val = chip->regmap[AK4117_REG_IO];
 222         change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
 223         if (change)
 224                 reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
 225         spin_unlock_irq(&chip->lock);
 226         return change;
 227 }
 228
 229 static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
 230                                 struct snd_ctl_elem_info *uinfo)
 231 {
 232         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 233         uinfo->count = 1;
 234         uinfo->value.integer.min = 0;
 235         uinfo->value.integer.max = 192000;
 236         return 0;
 237 }
 238
 239 static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
 240                                struct snd_ctl_elem_value *ucontrol)
 241 {
 242         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 243
 244         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
 245         return 0;
 246 }
 247
 248 static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 249 {
 250         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 251         uinfo->count = 1;
 252         return 0;
 253 }
 254
 255 static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
 256                                 struct snd_ctl_elem_value *ucontrol)
 257 {
 258         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 259         unsigned i;
 260
 261         for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
 262                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
 263         return 0;
 264 }
 265
 266 static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 267 {
 268         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 269         uinfo->count = 1;
 270         return 0;
 271 }
 272
 273 static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
 274                                       struct snd_ctl_elem_value *ucontrol)
 275 {
 276         memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
 277         return 0;
 278 }
 279
 280 static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 281 {
 282         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 283         uinfo->value.integer.min = 0;
 284         uinfo->value.integer.max = 0xffff;
 285         uinfo->count = 4;
 286         return 0;
 287 }
 288
 289 static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
 290                                  struct snd_ctl_elem_value *ucontrol)
 291 {
 292         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 293         unsigned short tmp;
 294
 295         ucontrol->value.integer.value[0] = 0xf8f2;
 296         ucontrol->value.integer.value[1] = 0x4e1f;
 297         tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
 298         ucontrol->value.integer.value[2] = tmp;
 299         tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
 300         ucontrol->value.integer.value[3] = tmp;
 301         return 0;
 302 }
 303
 304 static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 305 {
 306         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 307         uinfo->count = AK4117_REG_QSUB_SIZE;
 308         return 0;
 309 }
 310
 311 static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
 312                                  struct snd_ctl_elem_value *ucontrol)
 313 {
 314         struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
 315         unsigned i;
 316
 317         for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
 318                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
 319         return 0;
 320 }
 321
 322 /* Don't forget to change AK4117_CONTROLS define!!! */
 323 static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
 324 {
 325         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 326         .name =         "IEC958 Parity Errors",
 327         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 328         .info =         snd_ak4117_in_error_info,
 329         .get =          snd_ak4117_in_error_get,
 330         .private_value = AK4117_PARITY_ERRORS,
 331 },
 332 {
 333         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 334         .name =         "IEC958 V-Bit Errors",
 335         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 336         .info =         snd_ak4117_in_error_info,
 337         .get =          snd_ak4117_in_error_get,
 338         .private_value = AK4117_V_BIT_ERRORS,
 339 },
 340 {
 341         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 342         .name =         "IEC958 C-CRC Errors",
 343         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 344         .info =         snd_ak4117_in_error_info,
 345         .get =          snd_ak4117_in_error_get,
 346         .private_value = AK4117_CCRC_ERRORS,
 347 },
 348 {
 349         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 350         .name =         "IEC958 Q-CRC Errors",
 351         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 352         .info =         snd_ak4117_in_error_info,
 353         .get =          snd_ak4117_in_error_get,
 354         .private_value = AK4117_QCRC_ERRORS,
 355 },
 356 {
 357         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 358         .name =         "IEC958 External Rate",
 359         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 360         .info =         snd_ak4117_rate_info,
 361         .get =          snd_ak4117_rate_get,
 362 },
 363 {
 364         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 365         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 366         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 367         .info =         snd_ak4117_spdif_mask_info,
 368         .get =          snd_ak4117_spdif_mask_get,
 369 },
 370 {
 371         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 372         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 373         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 374         .info =         snd_ak4117_spdif_info,
 375         .get =          snd_ak4117_spdif_get,
 376 },
 377 {
 378         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 379         .name =         "IEC958 Preamble Capture Default",
 380         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 381         .info =         snd_ak4117_spdif_pinfo,
 382         .get =          snd_ak4117_spdif_pget,
 383 },
 384 {
 385         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 386         .name =         "IEC958 Q-subcode Capture Default",
 387         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 388         .info =         snd_ak4117_spdif_qinfo,
 389         .get =          snd_ak4117_spdif_qget,
 390 },
 391 {
 392         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 393         .name =         "IEC958 Audio",
 394         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 395         .info =         snd_ak4117_in_bit_info,
 396         .get =          snd_ak4117_in_bit_get,
 397         .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
 398 },
 399 {
 400         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 401         .name =         "IEC958 Non-PCM Bitstream",
 402         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 403         .info =         snd_ak4117_in_bit_info,
 404         .get =          snd_ak4117_in_bit_get,
 405         .private_value = (5<<8) | AK4117_REG_RCS1,
 406 },
 407 {
 408         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 409         .name =         "IEC958 DTS Bitstream",
 410         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 411         .info =         snd_ak4117_in_bit_info,
 412         .get =          snd_ak4117_in_bit_get,
 413         .private_value = (6<<8) | AK4117_REG_RCS1,
 414 },
 415 {
 416         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 417         .name =         "AK4117 Input Select",
 418         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
 419         .info =         snd_ak4117_rx_info,
 420         .get =          snd_ak4117_rx_get,
 421         .put =          snd_ak4117_rx_put,
 422 }
 423 };
 424
 425 int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
 426 {
 427         struct snd_kcontrol *kctl;
 428         unsigned int idx;
 429         int err;
 430
 431         if (snd_BUG_ON(!cap_substream))
 432                 return -EINVAL;
 433         ak4117->substream = cap_substream;
 434         for (idx = 0; idx < AK4117_CONTROLS; idx++) {
 435                 kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
 436                 if (kctl == NULL)
 437                         return -ENOMEM;
 438                 kctl->id.device = cap_substream->pcm->device;
 439                 kctl->id.subdevice = cap_substream->number;
 440                 err = snd_ctl_add(ak4117->card, kctl);
 441                 if (err < 0)
 442                         return err;
 443                 ak4117->kctls[idx] = kctl;
 444         }
 445         return 0;
 446 }
 447
 448 int snd_ak4117_external_rate(struct ak4117 *ak4117)
 449 {
 450         unsigned char rcs1;
 451
 452         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 453         return external_rate(rcs1);
 454 }
 455
 456 int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
 457 {
 458         struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
 459         unsigned long _flags;
 460         int res = 0;
 461         unsigned char rcs0, rcs1, rcs2;
 462         unsigned char c0, c1;
 463
 464         rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
 465         if (flags & AK4117_CHECK_NO_STAT)
 466                 goto __rate;
 467         rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
 468         rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
 469         // printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
 470         spin_lock_irqsave(&ak4117->lock, _flags);
 471         if (rcs0 & AK4117_PAR)
 472                 ak4117->errors[AK4117_PARITY_ERRORS]++;
 473         if (rcs0 & AK4117_V)
 474                 ak4117->errors[AK4117_V_BIT_ERRORS]++;
 475         if (rcs2 & AK4117_CCRC)
 476                 ak4117->errors[AK4117_CCRC_ERRORS]++;
 477         if (rcs2 & AK4117_QCRC)
 478                 ak4117->errors[AK4117_QCRC_ERRORS]++;
 479         c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
 480                      (rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
 481         c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
 482                      (rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
 483         ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
 484         ak4117->rcs1 = rcs1;
 485         ak4117->rcs2 = rcs2;
 486         spin_unlock_irqrestore(&ak4117->lock, _flags);
 487
 488         if (rcs0 & AK4117_PAR)
 489                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
 490         if (rcs0 & AK4117_V)
 491                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
 492         if (rcs2 & AK4117_CCRC)
 493                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
 494         if (rcs2 & AK4117_QCRC)
 495                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
 496
 497         /* rate change */
 498         if (c1 & 0x0f)
 499                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
 500
 501         if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
 502                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
 503         if (c0 & AK4117_QINT)
 504                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
 505
 506         if (c0 & AK4117_AUDION)
 507                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
 508         if (c1 & AK4117_NPCM)
 509                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
 510         if (c1 & AK4117_DTSCD)
 511                 snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
 512
 513         if (ak4117->change_callback && (c0 | c1) != 0)
 514                 ak4117->change_callback(ak4117, c0, c1);
 515
 516       __rate:
 517         /* compare rate */
 518         res = external_rate(rcs1);
 519         if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 520                 snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
 521                 if (snd_pcm_running(ak4117->substream)) {
 522                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 523                         snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
 524                         wake_up(&runtime->sleep);
 525                         res = 1;
 526                 }
 527                 snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
 528         }
 529         return res;
 530 }
 531
 532 static void snd_ak4117_timer(struct timer_list *t)
 533 {
 534         struct ak4117 *chip = from_timer(chip, t, timer);
 535
 536         if (chip->init)
 537                 return;
 538         snd_ak4117_check_rate_and_errors(chip, 0);
 539         mod_timer(&chip->timer, 1 + jiffies);
 540 }
 541
 542 EXPORT_SYMBOL(snd_ak4117_create);
 543 EXPORT_SYMBOL(snd_ak4117_reg_write);
 544 EXPORT_SYMBOL(snd_ak4117_reinit);
 545 EXPORT_SYMBOL(snd_ak4117_build);
 546 EXPORT_SYMBOL(snd_ak4117_external_rate);
 547 EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);