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 <linux/module.h>
  26 #include <sound/core.h>
  27 #include <sound/control.h>
  28 #include <sound/pcm.h>
  29 #include <sound/ak4114.h>
  30 #include <sound/asoundef.h>
  31 #include <sound/info.h>
  32
  33 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  34 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
  35 MODULE_LICENSE("GPL");
  36
  37 #define AK4114_ADDR                     0x00 /* fixed address */
  38
  39 static void ak4114_stats(struct work_struct *work);
  40 static void ak4114_init_regs(struct ak4114 *chip);
  41
  42 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
  43 {
  44         ak4114->write(ak4114->private_data, reg, val);
  45         if (reg <= AK4114_REG_INT1_MASK)
  46                 ak4114->regmap[reg] = val;
  47         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
  48                 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
  49 }
  50
  51 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
  52 {
  53         return ak4114->read(ak4114->private_data, reg);
  54 }
  55
  56 #if 0
  57 static void reg_dump(struct ak4114 *ak4114)
  58 {
  59         int i;
  60
  61         printk(KERN_DEBUG "AK4114 REG DUMP:\n");
  62         for (i = 0; i < 0x20; i++)
  63                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0);
  64 }
  65 #endif
  66
  67 static void snd_ak4114_free(struct ak4114 *chip)
  68 {
  69         atomic_inc(&chip->wq_processing);       /* don't schedule new work */
  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[6], 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         atomic_set(&chip->wq_processing, 0);
 103
 104         for (reg = 0; reg < 6; reg++)
 105                 chip->regmap[reg] = pgm[reg];
 106         for (reg = 0; reg < 5; reg++)
 107                 chip->txcsb[reg] = txcsb[reg];
 108
 109         ak4114_init_regs(chip);
 110
 111         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
 112         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
 113
 114         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
 115                 goto __fail;
 116
 117         if (r_ak4114)
 118                 *r_ak4114 = chip;
 119         return 0;
 120
 121       __fail:
 122         snd_ak4114_free(chip);
 123         return err < 0 ? err : -EIO;
 124 }
 125 EXPORT_SYMBOL(snd_ak4114_create);
 126
 127 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 128 {
 129         if (reg <= AK4114_REG_INT1_MASK)
 130                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 131         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
 132                 reg_write(chip, reg,
 133                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
 134 }
 135 EXPORT_SYMBOL(snd_ak4114_reg_write);
 136
 137 static void ak4114_init_regs(struct ak4114 *chip)
 138 {
 139         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
 140
 141         /* bring the chip to reset state and powerdown state */
 142         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
 143         udelay(200);
 144         /* release reset, but leave powerdown */
 145         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
 146         udelay(200);
 147         for (reg = 1; reg < 6; reg++)
 148                 reg_write(chip, reg, chip->regmap[reg]);
 149         for (reg = 0; reg < 5; reg++)
 150                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
 151         /* release powerdown, everything is initialized now */
 152         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
 153 }
 154
 155 void snd_ak4114_reinit(struct ak4114 *chip)
 156 {
 157         if (atomic_inc_return(&chip->wq_processing) == 1)
 158                 cancel_delayed_work_sync(&chip->work);
 159         ak4114_init_regs(chip);
 160         /* bring up statistics / event queing */
 161         if (atomic_dec_and_test(&chip->wq_processing))
 162                 schedule_delayed_work(&chip->work, HZ / 10);
 163 }
 164 EXPORT_SYMBOL(snd_ak4114_reinit);
 165
 166 static unsigned int external_rate(unsigned char rcs1)
 167 {
 168         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
 169         case AK4114_FS_32000HZ: return 32000;
 170         case AK4114_FS_44100HZ: return 44100;
 171         case AK4114_FS_48000HZ: return 48000;
 172         case AK4114_FS_88200HZ: return 88200;
 173         case AK4114_FS_96000HZ: return 96000;
 174         case AK4114_FS_176400HZ: return 176400;
 175         case AK4114_FS_192000HZ: return 192000;
 176         default:                return 0;
 177         }
 178 }
 179
 180 static int snd_ak4114_in_error_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 = LONG_MAX;
 187         return 0;
 188 }
 189
 190 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
 191                                    struct snd_ctl_elem_value *ucontrol)
 192 {
 193         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 194         long *ptr;
 195
 196         spin_lock_irq(&chip->lock);
 197         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 198         ucontrol->value.integer.value[0] = *ptr;
 199         *ptr = 0;
 200         spin_unlock_irq(&chip->lock);
 201         return 0;
 202 }
 203
 204 #define snd_ak4114_in_bit_info          snd_ctl_boolean_mono_info
 205
 206 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
 207                                  struct snd_ctl_elem_value *ucontrol)
 208 {
 209         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 210         unsigned char reg = kcontrol->private_value & 0xff;
 211         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 212         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 213
 214         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 215         return 0;
 216 }
 217
 218 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
 219                                 struct snd_ctl_elem_info *uinfo)
 220 {
 221         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 222         uinfo->count = 1;
 223         uinfo->value.integer.min = 0;
 224         uinfo->value.integer.max = 192000;
 225         return 0;
 226 }
 227
 228 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
 229                                struct snd_ctl_elem_value *ucontrol)
 230 {
 231         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 232
 233         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
 234         return 0;
 235 }
 236
 237 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 238 {
 239         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 240         uinfo->count = 1;
 241         return 0;
 242 }
 243
 244 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
 245                                 struct snd_ctl_elem_value *ucontrol)
 246 {
 247         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 248         unsigned i;
 249
 250         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
 251                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
 252         return 0;
 253 }
 254
 255 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
 256                                          struct snd_ctl_elem_value *ucontrol)
 257 {
 258         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 259         unsigned i;
 260
 261         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 262                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
 263         return 0;
 264 }
 265
 266 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
 267                                          struct snd_ctl_elem_value *ucontrol)
 268 {
 269         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 270         unsigned i;
 271
 272         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 273                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
 274         return 0;
 275 }
 276
 277 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 278 {
 279         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 280         uinfo->count = 1;
 281         return 0;
 282 }
 283
 284 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
 285                                       struct snd_ctl_elem_value *ucontrol)
 286 {
 287         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
 288         return 0;
 289 }
 290
 291 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 292 {
 293         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 294         uinfo->value.integer.min = 0;
 295         uinfo->value.integer.max = 0xffff;
 296         uinfo->count = 4;
 297         return 0;
 298 }
 299
 300 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
 301                                  struct snd_ctl_elem_value *ucontrol)
 302 {
 303         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 304         unsigned short tmp;
 305
 306         ucontrol->value.integer.value[0] = 0xf8f2;
 307         ucontrol->value.integer.value[1] = 0x4e1f;
 308         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
 309         ucontrol->value.integer.value[2] = tmp;
 310         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
 311         ucontrol->value.integer.value[3] = tmp;
 312         return 0;
 313 }
 314
 315 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 316 {
 317         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 318         uinfo->count = AK4114_REG_QSUB_SIZE;
 319         return 0;
 320 }
 321
 322 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
 323                                  struct snd_ctl_elem_value *ucontrol)
 324 {
 325         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 326         unsigned i;
 327
 328         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
 329                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
 330         return 0;
 331 }
 332
 333 /* Don't forget to change AK4114_CONTROLS define!!! */
 334 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 335 {
 336         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 337         .name =         "IEC958 Parity Errors",
 338         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 339         .info =         snd_ak4114_in_error_info,
 340         .get =          snd_ak4114_in_error_get,
 341         .private_value = offsetof(struct ak4114, parity_errors),
 342 },
 343 {
 344         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 345         .name =         "IEC958 V-Bit Errors",
 346         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 347         .info =         snd_ak4114_in_error_info,
 348         .get =          snd_ak4114_in_error_get,
 349         .private_value = offsetof(struct ak4114, v_bit_errors),
 350 },
 351 {
 352         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 353         .name =         "IEC958 C-CRC Errors",
 354         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 355         .info =         snd_ak4114_in_error_info,
 356         .get =          snd_ak4114_in_error_get,
 357         .private_value = offsetof(struct ak4114, ccrc_errors),
 358 },
 359 {
 360         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 361         .name =         "IEC958 Q-CRC Errors",
 362         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 363         .info =         snd_ak4114_in_error_info,
 364         .get =          snd_ak4114_in_error_get,
 365         .private_value = offsetof(struct ak4114, qcrc_errors),
 366 },
 367 {
 368         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 369         .name =         "IEC958 External Rate",
 370         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 371         .info =         snd_ak4114_rate_info,
 372         .get =          snd_ak4114_rate_get,
 373 },
 374 {
 375         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 376         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 377         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 378         .info =         snd_ak4114_spdif_mask_info,
 379         .get =          snd_ak4114_spdif_mask_get,
 380 },
 381 {
 382         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 383         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 384         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 385         .info =         snd_ak4114_spdif_info,
 386         .get =          snd_ak4114_spdif_playback_get,
 387         .put =          snd_ak4114_spdif_playback_put,
 388 },
 389 {
 390         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 391         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 392         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 393         .info =         snd_ak4114_spdif_mask_info,
 394         .get =          snd_ak4114_spdif_mask_get,
 395 },
 396 {
 397         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 398         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 399         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 400         .info =         snd_ak4114_spdif_info,
 401         .get =          snd_ak4114_spdif_get,
 402 },
 403 {
 404         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 405         .name =         "IEC958 Preamble Capture Default",
 406         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 407         .info =         snd_ak4114_spdif_pinfo,
 408         .get =          snd_ak4114_spdif_pget,
 409 },
 410 {
 411         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 412         .name =         "IEC958 Q-subcode Capture Default",
 413         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 414         .info =         snd_ak4114_spdif_qinfo,
 415         .get =          snd_ak4114_spdif_qget,
 416 },
 417 {
 418         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 419         .name =         "IEC958 Audio",
 420         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 421         .info =         snd_ak4114_in_bit_info,
 422         .get =          snd_ak4114_in_bit_get,
 423         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
 424 },
 425 {
 426         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 427         .name =         "IEC958 Non-PCM Bitstream",
 428         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 429         .info =         snd_ak4114_in_bit_info,
 430         .get =          snd_ak4114_in_bit_get,
 431         .private_value = (6<<8) | AK4114_REG_RCS0,
 432 },
 433 {
 434         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 435         .name =         "IEC958 DTS Bitstream",
 436         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 437         .info =         snd_ak4114_in_bit_info,
 438         .get =          snd_ak4114_in_bit_get,
 439         .private_value = (3<<8) | AK4114_REG_RCS0,
 440 },
 441 {
 442         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 443         .name =         "IEC958 PPL Lock Status",
 444         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 445         .info =         snd_ak4114_in_bit_info,
 446         .get =          snd_ak4114_in_bit_get,
 447         .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
 448 }
 449 };
 450
 451
 452 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
 453                 struct snd_info_buffer *buffer)
 454 {
 455         struct ak4114 *ak4114 = entry->private_data;
 456         int reg, val;
 457         /* all ak4114 registers 0x00 - 0x1f */
 458         for (reg = 0; reg < 0x20; reg++) {
 459                 val = reg_read(ak4114, reg);
 460                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
 461         }
 462 }
 463
 464 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
 465 {
 466         struct snd_info_entry *entry;
 467         if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
 468                 snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
 469 }
 470
 471 int snd_ak4114_build(struct ak4114 *ak4114,
 472                      struct snd_pcm_substream *ply_substream,
 473                      struct snd_pcm_substream *cap_substream)
 474 {
 475         struct snd_kcontrol *kctl;
 476         unsigned int idx;
 477         int err;
 478
 479         if (snd_BUG_ON(!cap_substream))
 480                 return -EINVAL;
 481         ak4114->playback_substream = ply_substream;
 482         ak4114->capture_substream = cap_substream;
 483         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
 484                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
 485                 if (kctl == NULL)
 486                         return -ENOMEM;
 487                 if (strstr(kctl->id.name, "Playback")) {
 488                         if (ply_substream == NULL) {
 489                                 snd_ctl_free_one(kctl);
 490                                 ak4114->kctls[idx] = NULL;
 491                                 continue;
 492                         }
 493                         kctl->id.device = ply_substream->pcm->device;
 494                         kctl->id.subdevice = ply_substream->number;
 495                 } else {
 496                         kctl->id.device = cap_substream->pcm->device;
 497                         kctl->id.subdevice = cap_substream->number;
 498                 }
 499                 err = snd_ctl_add(ak4114->card, kctl);
 500                 if (err < 0)
 501                         return err;
 502                 ak4114->kctls[idx] = kctl;
 503         }
 504         snd_ak4114_proc_init(ak4114);
 505         /* trigger workq */
 506         schedule_delayed_work(&ak4114->work, HZ / 10);
 507         return 0;
 508 }
 509 EXPORT_SYMBOL(snd_ak4114_build);
 510
 511 /* notify kcontrols if any parameters are changed */
 512 static void ak4114_notify(struct ak4114 *ak4114,
 513                           unsigned char rcs0, unsigned char rcs1,
 514                           unsigned char c0, unsigned char c1)
 515 {
 516         if (!ak4114->kctls[0])
 517                 return;
 518
 519         if (rcs0 & AK4114_PAR)
 520                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 521                                &ak4114->kctls[0]->id);
 522         if (rcs0 & AK4114_V)
 523                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 524                                &ak4114->kctls[1]->id);
 525         if (rcs1 & AK4114_CCRC)
 526                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 527                                &ak4114->kctls[2]->id);
 528         if (rcs1 & AK4114_QCRC)
 529                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 530                                &ak4114->kctls[3]->id);
 531
 532         /* rate change */
 533         if (c1 & 0xf0)
 534                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 535                                &ak4114->kctls[4]->id);
 536
 537         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
 538                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 539                                &ak4114->kctls[9]->id);
 540         if (c0 & AK4114_QINT)
 541                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 542                                &ak4114->kctls[10]->id);
 543
 544         if (c0 & AK4114_AUDION)
 545                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 546                                &ak4114->kctls[11]->id);
 547         if (c0 & AK4114_AUTO)
 548                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 549                                &ak4114->kctls[12]->id);
 550         if (c0 & AK4114_DTSCD)
 551                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 552                                &ak4114->kctls[13]->id);
 553         if (c0 & AK4114_UNLCK)
 554                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 555                                &ak4114->kctls[14]->id);
 556 }
 557
 558 int snd_ak4114_external_rate(struct ak4114 *ak4114)
 559 {
 560         unsigned char rcs1;
 561
 562         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 563         return external_rate(rcs1);
 564 }
 565 EXPORT_SYMBOL(snd_ak4114_external_rate);
 566
 567 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
 568 {
 569         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
 570         unsigned long _flags;
 571         int res = 0;
 572         unsigned char rcs0, rcs1;
 573         unsigned char c0, c1;
 574
 575         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 576         if (flags & AK4114_CHECK_NO_STAT)
 577                 goto __rate;
 578         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
 579         spin_lock_irqsave(&ak4114->lock, _flags);
 580         if (rcs0 & AK4114_PAR)
 581                 ak4114->parity_errors++;
 582         if (rcs1 & AK4114_V)
 583                 ak4114->v_bit_errors++;
 584         if (rcs1 & AK4114_CCRC)
 585                 ak4114->ccrc_errors++;
 586         if (rcs1 & AK4114_QCRC)
 587                 ak4114->qcrc_errors++;
 588         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
 589                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
 590         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
 591         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
 592         ak4114->rcs1 = rcs1;
 593         spin_unlock_irqrestore(&ak4114->lock, _flags);
 594
 595         ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
 596         if (ak4114->change_callback && (c0 | c1) != 0)
 597                 ak4114->change_callback(ak4114, c0, c1);
 598
 599       __rate:
 600         /* compare rate */
 601         res = external_rate(rcs1);
 602         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 603                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
 604                 if (snd_pcm_running(ak4114->capture_substream)) {
 605                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 606                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
 607                         res = 1;
 608                 }
 609                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
 610         }
 611         return res;
 612 }
 613 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
 614
 615 static void ak4114_stats(struct work_struct *work)
 616 {
 617         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
 618
 619         if (atomic_inc_return(&chip->wq_processing) == 1)
 620                 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
 621         if (atomic_dec_and_test(&chip->wq_processing))
 622                 schedule_delayed_work(&chip->work, HZ / 10);
 623 }
 624
 625 #ifdef CONFIG_PM
 626 void snd_ak4114_suspend(struct ak4114 *chip)
 627 {
 628         atomic_inc(&chip->wq_processing); /* don't schedule new work */
 629         cancel_delayed_work_sync(&chip->work);
 630 }
 631 EXPORT_SYMBOL(snd_ak4114_suspend);
 632
 633 void snd_ak4114_resume(struct ak4114 *chip)
 634 {
 635         atomic_dec(&chip->wq_processing);
 636         snd_ak4114_reinit(chip);
 637 }
 638 EXPORT_SYMBOL(snd_ak4114_resume);
 639 #endif