sound/i2c/other/ak4114.c

   1 /*
   2  *  Routines for control of the AK4114 via I2C and 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 <sound/core.h>
  26 #include <sound/control.h>
  27 #include <sound/pcm.h>
  28 #include <sound/ak4114.h>
  29 #include <sound/asoundef.h>
  30 #include <sound/info.h>
  31
  32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  33 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
  34 MODULE_LICENSE("GPL");
  35
  36 #define AK4114_ADDR                     0x00 /* fixed address */
  37
  38 static void ak4114_stats(struct work_struct *work);
  39 static void ak4114_init_regs(struct ak4114 *chip);
  40
  41 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
  42 {
  43         ak4114->write(ak4114->private_data, reg, val);
  44         if (reg <= AK4114_REG_INT1_MASK)
  45                 ak4114->regmap[reg] = val;
  46         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
  47                 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
  48 }
  49
  50 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
  51 {
  52         return ak4114->read(ak4114->private_data, reg);
  53 }
  54
  55 #if 0
  56 static void reg_dump(struct ak4114 *ak4114)
  57 {
  58         int i;
  59
  60         printk(KERN_DEBUG "AK4114 REG DUMP:\n");
  61         for (i = 0; i < 0x20; i++)
  62                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
  63 }
  64 #endif
  65
  66 static void snd_ak4114_free(struct ak4114 *chip)
  67 {
  68         chip->init = 1; /* don't schedule new work */
  69         mb();
  70         cancel_delayed_work_sync(&chip->work);
  71         kfree(chip);
  72 }
  73
  74 static int snd_ak4114_dev_free(struct snd_device *device)
  75 {
  76         struct ak4114 *chip = device->device_data;
  77         snd_ak4114_free(chip);
  78         return 0;
  79 }
  80
  81 int snd_ak4114_create(struct snd_card *card,
  82                       ak4114_read_t *read, ak4114_write_t *write,
  83                       const unsigned char pgm[7], const unsigned char txcsb[5],
  84                       void *private_data, struct ak4114 **r_ak4114)
  85 {
  86         struct ak4114 *chip;
  87         int err = 0;
  88         unsigned char reg;
  89         static struct snd_device_ops ops = {
  90                 .dev_free =     snd_ak4114_dev_free,
  91         };
  92
  93         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  94         if (chip == NULL)
  95                 return -ENOMEM;
  96         spin_lock_init(&chip->lock);
  97         chip->card = card;
  98         chip->read = read;
  99         chip->write = write;
 100         chip->private_data = private_data;
 101         INIT_DELAYED_WORK(&chip->work, ak4114_stats);
 102
 103         for (reg = 0; reg < 7; reg++)
 104                 chip->regmap[reg] = pgm[reg];
 105         for (reg = 0; reg < 5; reg++)
 106                 chip->txcsb[reg] = txcsb[reg];
 107
 108         ak4114_init_regs(chip);
 109
 110         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
 111         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
 112
 113         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
 114                 goto __fail;
 115
 116         if (r_ak4114)
 117                 *r_ak4114 = chip;
 118         return 0;
 119
 120       __fail:
 121         snd_ak4114_free(chip);
 122         return err < 0 ? err : -EIO;
 123 }
 124
 125 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 126 {
 127         if (reg <= AK4114_REG_INT1_MASK)
 128                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 129         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
 130                 reg_write(chip, reg,
 131                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
 132 }
 133
 134 static void ak4114_init_regs(struct ak4114 *chip)
 135 {
 136         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
 137
 138         /* bring the chip to reset state and powerdown state */
 139         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
 140         udelay(200);
 141         /* release reset, but leave powerdown */
 142         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
 143         udelay(200);
 144         for (reg = 1; reg < 7; reg++)
 145                 reg_write(chip, reg, chip->regmap[reg]);
 146         for (reg = 0; reg < 5; reg++)
 147                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
 148         /* release powerdown, everything is initialized now */
 149         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
 150 }
 151
 152 void snd_ak4114_reinit(struct ak4114 *chip)
 153 {
 154         chip->init = 1;
 155         mb();
 156         flush_delayed_work_sync(&chip->work);
 157         ak4114_init_regs(chip);
 158         /* bring up statistics / event queing */
 159         chip->init = 0;
 160         if (chip->kctls[0])
 161                 schedule_delayed_work(&chip->work, HZ / 10);
 162 }
 163
 164 static unsigned int external_rate(unsigned char rcs1)
 165 {
 166         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
 167         case AK4114_FS_32000HZ: return 32000;
 168         case AK4114_FS_44100HZ: return 44100;
 169         case AK4114_FS_48000HZ: return 48000;
 170         case AK4114_FS_88200HZ: return 88200;
 171         case AK4114_FS_96000HZ: return 96000;
 172         case AK4114_FS_176400HZ: return 176400;
 173         case AK4114_FS_192000HZ: return 192000;
 174         default:                return 0;
 175         }
 176 }
 177
 178 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
 179                                     struct snd_ctl_elem_info *uinfo)
 180 {
 181         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 182         uinfo->count = 1;
 183         uinfo->value.integer.min = 0;
 184         uinfo->value.integer.max = LONG_MAX;
 185         return 0;
 186 }
 187
 188 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
 189                                    struct snd_ctl_elem_value *ucontrol)
 190 {
 191         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 192         long *ptr;
 193
 194         spin_lock_irq(&chip->lock);
 195         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 196         ucontrol->value.integer.value[0] = *ptr;
 197         *ptr = 0;
 198         spin_unlock_irq(&chip->lock);
 199         return 0;
 200 }
 201
 202 #define snd_ak4114_in_bit_info          snd_ctl_boolean_mono_info
 203
 204 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
 205                                  struct snd_ctl_elem_value *ucontrol)
 206 {
 207         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 208         unsigned char reg = kcontrol->private_value & 0xff;
 209         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 210         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 211
 212         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 213         return 0;
 214 }
 215
 216 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
 217                                 struct snd_ctl_elem_info *uinfo)
 218 {
 219         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 220         uinfo->count = 1;
 221         uinfo->value.integer.min = 0;
 222         uinfo->value.integer.max = 192000;
 223         return 0;
 224 }
 225
 226 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
 227                                struct snd_ctl_elem_value *ucontrol)
 228 {
 229         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 230
 231         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
 232         return 0;
 233 }
 234
 235 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 236 {
 237         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 238         uinfo->count = 1;
 239         return 0;
 240 }
 241
 242 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
 243                                 struct snd_ctl_elem_value *ucontrol)
 244 {
 245         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 246         unsigned i;
 247
 248         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
 249                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
 250         return 0;
 251 }
 252
 253 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
 254                                          struct snd_ctl_elem_value *ucontrol)
 255 {
 256         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 257         unsigned i;
 258
 259         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 260                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
 261         return 0;
 262 }
 263
 264 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
 265                                          struct snd_ctl_elem_value *ucontrol)
 266 {
 267         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 268         unsigned i;
 269
 270         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 271                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
 272         return 0;
 273 }
 274
 275 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 276 {
 277         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 278         uinfo->count = 1;
 279         return 0;
 280 }
 281
 282 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
 283                                       struct snd_ctl_elem_value *ucontrol)
 284 {
 285         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
 286         return 0;
 287 }
 288
 289 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 290 {
 291         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 292         uinfo->value.integer.min = 0;
 293         uinfo->value.integer.max = 0xffff;
 294         uinfo->count = 4;
 295         return 0;
 296 }
 297
 298 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
 299                                  struct snd_ctl_elem_value *ucontrol)
 300 {
 301         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 302         unsigned short tmp;
 303
 304         ucontrol->value.integer.value[0] = 0xf8f2;
 305         ucontrol->value.integer.value[1] = 0x4e1f;
 306         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
 307         ucontrol->value.integer.value[2] = tmp;
 308         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
 309         ucontrol->value.integer.value[3] = tmp;
 310         return 0;
 311 }
 312
 313 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 314 {
 315         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 316         uinfo->count = AK4114_REG_QSUB_SIZE;
 317         return 0;
 318 }
 319
 320 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
 321                                  struct snd_ctl_elem_value *ucontrol)
 322 {
 323         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 324         unsigned i;
 325
 326         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
 327                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
 328         return 0;
 329 }
 330
 331 /* Don't forget to change AK4114_CONTROLS define!!! */
 332 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 333 {
 334         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 335         .name =         "IEC958 Parity Errors",
 336         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 337         .info =         snd_ak4114_in_error_info,
 338         .get =          snd_ak4114_in_error_get,
 339         .private_value = offsetof(struct ak4114, parity_errors),
 340 },
 341 {
 342         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 343         .name =         "IEC958 V-Bit Errors",
 344         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 345         .info =         snd_ak4114_in_error_info,
 346         .get =          snd_ak4114_in_error_get,
 347         .private_value = offsetof(struct ak4114, v_bit_errors),
 348 },
 349 {
 350         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 351         .name =         "IEC958 C-CRC Errors",
 352         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 353         .info =         snd_ak4114_in_error_info,
 354         .get =          snd_ak4114_in_error_get,
 355         .private_value = offsetof(struct ak4114, ccrc_errors),
 356 },
 357 {
 358         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 359         .name =         "IEC958 Q-CRC Errors",
 360         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 361         .info =         snd_ak4114_in_error_info,
 362         .get =          snd_ak4114_in_error_get,
 363         .private_value = offsetof(struct ak4114, qcrc_errors),
 364 },
 365 {
 366         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 367         .name =         "IEC958 External Rate",
 368         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 369         .info =         snd_ak4114_rate_info,
 370         .get =          snd_ak4114_rate_get,
 371 },
 372 {
 373         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 374         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 375         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 376         .info =         snd_ak4114_spdif_mask_info,
 377         .get =          snd_ak4114_spdif_mask_get,
 378 },
 379 {
 380         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 381         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 382         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 383         .info =         snd_ak4114_spdif_info,
 384         .get =          snd_ak4114_spdif_playback_get,
 385         .put =          snd_ak4114_spdif_playback_put,
 386 },
 387 {
 388         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 389         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 390         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 391         .info =         snd_ak4114_spdif_mask_info,
 392         .get =          snd_ak4114_spdif_mask_get,
 393 },
 394 {
 395         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 396         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 397         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 398         .info =         snd_ak4114_spdif_info,
 399         .get =          snd_ak4114_spdif_get,
 400 },
 401 {
 402         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 403         .name =         "IEC958 Preample Capture Default",
 404         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 405         .info =         snd_ak4114_spdif_pinfo,
 406         .get =          snd_ak4114_spdif_pget,
 407 },
 408 {
 409         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 410         .name =         "IEC958 Q-subcode Capture Default",
 411         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 412         .info =         snd_ak4114_spdif_qinfo,
 413         .get =          snd_ak4114_spdif_qget,
 414 },
 415 {
 416         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 417         .name =         "IEC958 Audio",
 418         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 419         .info =         snd_ak4114_in_bit_info,
 420         .get =          snd_ak4114_in_bit_get,
 421         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
 422 },
 423 {
 424         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 425         .name =         "IEC958 Non-PCM Bitstream",
 426         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 427         .info =         snd_ak4114_in_bit_info,
 428         .get =          snd_ak4114_in_bit_get,
 429         .private_value = (6<<8) | AK4114_REG_RCS0,
 430 },
 431 {
 432         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 433         .name =         "IEC958 DTS Bitstream",
 434         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 435         .info =         snd_ak4114_in_bit_info,
 436         .get =          snd_ak4114_in_bit_get,
 437         .private_value = (3<<8) | AK4114_REG_RCS0,
 438 },
 439 {
 440         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 441         .name =         "IEC958 PPL Lock Status",
 442         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 443         .info =         snd_ak4114_in_bit_info,
 444         .get =          snd_ak4114_in_bit_get,
 445         .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
 446 }
 447 };
 448
 449
 450 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
 451                 struct snd_info_buffer *buffer)
 452 {
 453         struct ak4114 *ak4114 = entry->private_data;
 454         int reg, val;
 455         /* all ak4114 registers 0x00 - 0x1f */
 456         for (reg = 0; reg < 0x20; reg++) {
 457                 val = reg_read(ak4114, reg);
 458                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
 459         }
 460 }
 461
 462 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
 463 {
 464         struct snd_info_entry *entry;
 465         if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
 466                 snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
 467 }
 468
 469 int snd_ak4114_build(struct ak4114 *ak4114,
 470                      struct snd_pcm_substream *ply_substream,
 471                      struct snd_pcm_substream *cap_substream)
 472 {
 473         struct snd_kcontrol *kctl;
 474         unsigned int idx;
 475         int err;
 476
 477         if (snd_BUG_ON(!cap_substream))
 478                 return -EINVAL;
 479         ak4114->playback_substream = ply_substream;
 480         ak4114->capture_substream = cap_substream;
 481         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
 482                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
 483                 if (kctl == NULL)
 484                         return -ENOMEM;
 485                 if (strstr(kctl->id.name, "Playback")) {
 486                         if (ply_substream == NULL) {
 487                                 snd_ctl_free_one(kctl);
 488                                 ak4114->kctls[idx] = NULL;
 489                                 continue;
 490                         }
 491                         kctl->id.device = ply_substream->pcm->device;
 492                         kctl->id.subdevice = ply_substream->number;
 493                 } else {
 494                         kctl->id.device = cap_substream->pcm->device;
 495                         kctl->id.subdevice = cap_substream->number;
 496                 }
 497                 err = snd_ctl_add(ak4114->card, kctl);
 498                 if (err < 0)
 499                         return err;
 500                 ak4114->kctls[idx] = kctl;
 501         }
 502         snd_ak4114_proc_init(ak4114);
 503         /* trigger workq */
 504         schedule_delayed_work(&ak4114->work, HZ / 10);
 505         return 0;
 506 }
 507
 508 /* notify kcontrols if any parameters are changed */
 509 static void ak4114_notify(struct ak4114 *ak4114,
 510                           unsigned char rcs0, unsigned char rcs1,
 511                           unsigned char c0, unsigned char c1)
 512 {
 513         if (!ak4114->kctls[0])
 514                 return;
 515
 516         if (rcs0 & AK4114_PAR)
 517                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 518                                &ak4114->kctls[0]->id);
 519         if (rcs0 & AK4114_V)
 520                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 521                                &ak4114->kctls[1]->id);
 522         if (rcs1 & AK4114_CCRC)
 523                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 524                                &ak4114->kctls[2]->id);
 525         if (rcs1 & AK4114_QCRC)
 526                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 527                                &ak4114->kctls[3]->id);
 528
 529         /* rate change */
 530         if (c1 & 0xf0)
 531                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 532                                &ak4114->kctls[4]->id);
 533
 534         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
 535                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 536                                &ak4114->kctls[9]->id);
 537         if (c0 & AK4114_QINT)
 538                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 539                                &ak4114->kctls[10]->id);
 540
 541         if (c0 & AK4114_AUDION)
 542                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 543                                &ak4114->kctls[11]->id);
 544         if (c0 & AK4114_AUTO)
 545                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 546                                &ak4114->kctls[12]->id);
 547         if (c0 & AK4114_DTSCD)
 548                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 549                                &ak4114->kctls[13]->id);
 550         if (c0 & AK4114_UNLCK)
 551                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 552                                &ak4114->kctls[14]->id);
 553 }
 554
 555 int snd_ak4114_external_rate(struct ak4114 *ak4114)
 556 {
 557         unsigned char rcs1;
 558
 559         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 560         return external_rate(rcs1);
 561 }
 562
 563 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
 564 {
 565         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
 566         unsigned long _flags;
 567         int res = 0;
 568         unsigned char rcs0, rcs1;
 569         unsigned char c0, c1;
 570
 571         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 572         if (flags & AK4114_CHECK_NO_STAT)
 573                 goto __rate;
 574         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
 575         spin_lock_irqsave(&ak4114->lock, _flags);
 576         if (rcs0 & AK4114_PAR)
 577                 ak4114->parity_errors++;
 578         if (rcs1 & AK4114_V)
 579                 ak4114->v_bit_errors++;
 580         if (rcs1 & AK4114_CCRC)
 581                 ak4114->ccrc_errors++;
 582         if (rcs1 & AK4114_QCRC)
 583                 ak4114->qcrc_errors++;
 584         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
 585                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
 586         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
 587         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
 588         ak4114->rcs1 = rcs1;
 589         spin_unlock_irqrestore(&ak4114->lock, _flags);
 590
 591         ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
 592         if (ak4114->change_callback && (c0 | c1) != 0)
 593                 ak4114->change_callback(ak4114, c0, c1);
 594
 595       __rate:
 596         /* compare rate */
 597         res = external_rate(rcs1);
 598         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 599                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
 600                 if (snd_pcm_running(ak4114->capture_substream)) {
 601                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 602                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
 603                         res = 1;
 604                 }
 605                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
 606         }
 607         return res;
 608 }
 609
 610 static void ak4114_stats(struct work_struct *work)
 611 {
 612         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
 613
 614         if (!chip->init)
 615                 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
 616
 617         schedule_delayed_work(&chip->work, HZ / 10);
 618 }
 619
 620 EXPORT_SYMBOL(snd_ak4114_create);
 621 EXPORT_SYMBOL(snd_ak4114_reg_write);
 622 EXPORT_SYMBOL(snd_ak4114_reinit);
 623 EXPORT_SYMBOL(snd_ak4114_build);
 624 EXPORT_SYMBOL(snd_ak4114_external_rate);
 625 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);