kernel/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         mutex_init(&chip->reinit_mutex);
 104
 105         for (reg = 0; reg < 6; reg++)
 106                 chip->regmap[reg] = pgm[reg];
 107         for (reg = 0; reg < 5; reg++)
 108                 chip->txcsb[reg] = txcsb[reg];
 109
 110         ak4114_init_regs(chip);
 111
 112         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
 113         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
 114
 115         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
 116                 goto __fail;
 117
 118         if (r_ak4114)
 119                 *r_ak4114 = chip;
 120         return 0;
 121
 122       __fail:
 123         snd_ak4114_free(chip);
 124         return err < 0 ? err : -EIO;
 125 }
 126 EXPORT_SYMBOL(snd_ak4114_create);
 127
 128 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
 129 {
 130         if (reg <= AK4114_REG_INT1_MASK)
 131                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
 132         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
 133                 reg_write(chip, reg,
 134                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
 135 }
 136 EXPORT_SYMBOL(snd_ak4114_reg_write);
 137
 138 static void ak4114_init_regs(struct ak4114 *chip)
 139 {
 140         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
 141
 142         /* bring the chip to reset state and powerdown state */
 143         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
 144         udelay(200);
 145         /* release reset, but leave powerdown */
 146         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
 147         udelay(200);
 148         for (reg = 1; reg < 6; reg++)
 149                 reg_write(chip, reg, chip->regmap[reg]);
 150         for (reg = 0; reg < 5; reg++)
 151                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
 152         /* release powerdown, everything is initialized now */
 153         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
 154 }
 155
 156 void snd_ak4114_reinit(struct ak4114 *chip)
 157 {
 158         if (atomic_inc_return(&chip->wq_processing) == 1)
 159                 cancel_delayed_work_sync(&chip->work);
 160         mutex_lock(&chip->reinit_mutex);
 161         ak4114_init_regs(chip);
 162         mutex_unlock(&chip->reinit_mutex);
 163         /* bring up statistics / event queing */
 164         if (atomic_dec_and_test(&chip->wq_processing))
 165                 schedule_delayed_work(&chip->work, HZ / 10);
 166 }
 167 EXPORT_SYMBOL(snd_ak4114_reinit);
 168
 169 static unsigned int external_rate(unsigned char rcs1)
 170 {
 171         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
 172         case AK4114_FS_32000HZ: return 32000;
 173         case AK4114_FS_44100HZ: return 44100;
 174         case AK4114_FS_48000HZ: return 48000;
 175         case AK4114_FS_88200HZ: return 88200;
 176         case AK4114_FS_96000HZ: return 96000;
 177         case AK4114_FS_176400HZ: return 176400;
 178         case AK4114_FS_192000HZ: return 192000;
 179         default:                return 0;
 180         }
 181 }
 182
 183 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
 184                                     struct snd_ctl_elem_info *uinfo)
 185 {
 186         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 187         uinfo->count = 1;
 188         uinfo->value.integer.min = 0;
 189         uinfo->value.integer.max = LONG_MAX;
 190         return 0;
 191 }
 192
 193 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
 194                                    struct snd_ctl_elem_value *ucontrol)
 195 {
 196         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 197         long *ptr;
 198
 199         spin_lock_irq(&chip->lock);
 200         ptr = (long *)(((char *)chip) + kcontrol->private_value);
 201         ucontrol->value.integer.value[0] = *ptr;
 202         *ptr = 0;
 203         spin_unlock_irq(&chip->lock);
 204         return 0;
 205 }
 206
 207 #define snd_ak4114_in_bit_info          snd_ctl_boolean_mono_info
 208
 209 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
 210                                  struct snd_ctl_elem_value *ucontrol)
 211 {
 212         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 213         unsigned char reg = kcontrol->private_value & 0xff;
 214         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
 215         unsigned char inv = (kcontrol->private_value >> 31) & 1;
 216
 217         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
 218         return 0;
 219 }
 220
 221 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
 222                                 struct snd_ctl_elem_info *uinfo)
 223 {
 224         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 225         uinfo->count = 1;
 226         uinfo->value.integer.min = 0;
 227         uinfo->value.integer.max = 192000;
 228         return 0;
 229 }
 230
 231 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
 232                                struct snd_ctl_elem_value *ucontrol)
 233 {
 234         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 235
 236         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
 237         return 0;
 238 }
 239
 240 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 241 {
 242         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 243         uinfo->count = 1;
 244         return 0;
 245 }
 246
 247 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
 248                                 struct snd_ctl_elem_value *ucontrol)
 249 {
 250         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 251         unsigned i;
 252
 253         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
 254                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
 255         return 0;
 256 }
 257
 258 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
 259                                          struct snd_ctl_elem_value *ucontrol)
 260 {
 261         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 262         unsigned i;
 263
 264         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 265                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
 266         return 0;
 267 }
 268
 269 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
 270                                          struct snd_ctl_elem_value *ucontrol)
 271 {
 272         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 273         unsigned i;
 274
 275         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
 276                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
 277         return 0;
 278 }
 279
 280 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 281 {
 282         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 283         uinfo->count = 1;
 284         return 0;
 285 }
 286
 287 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
 288                                       struct snd_ctl_elem_value *ucontrol)
 289 {
 290         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
 291         return 0;
 292 }
 293
 294 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 295 {
 296         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 297         uinfo->value.integer.min = 0;
 298         uinfo->value.integer.max = 0xffff;
 299         uinfo->count = 4;
 300         return 0;
 301 }
 302
 303 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
 304                                  struct snd_ctl_elem_value *ucontrol)
 305 {
 306         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 307         unsigned short tmp;
 308
 309         ucontrol->value.integer.value[0] = 0xf8f2;
 310         ucontrol->value.integer.value[1] = 0x4e1f;
 311         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
 312         ucontrol->value.integer.value[2] = tmp;
 313         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
 314         ucontrol->value.integer.value[3] = tmp;
 315         return 0;
 316 }
 317
 318 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 319 {
 320         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 321         uinfo->count = AK4114_REG_QSUB_SIZE;
 322         return 0;
 323 }
 324
 325 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
 326                                  struct snd_ctl_elem_value *ucontrol)
 327 {
 328         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
 329         unsigned i;
 330
 331         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
 332                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
 333         return 0;
 334 }
 335
 336 /* Don't forget to change AK4114_CONTROLS define!!! */
 337 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 338 {
 339         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 340         .name =         "IEC958 Parity Errors",
 341         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 342         .info =         snd_ak4114_in_error_info,
 343         .get =          snd_ak4114_in_error_get,
 344         .private_value = offsetof(struct ak4114, parity_errors),
 345 },
 346 {
 347         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 348         .name =         "IEC958 V-Bit Errors",
 349         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 350         .info =         snd_ak4114_in_error_info,
 351         .get =          snd_ak4114_in_error_get,
 352         .private_value = offsetof(struct ak4114, v_bit_errors),
 353 },
 354 {
 355         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 356         .name =         "IEC958 C-CRC Errors",
 357         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 358         .info =         snd_ak4114_in_error_info,
 359         .get =          snd_ak4114_in_error_get,
 360         .private_value = offsetof(struct ak4114, ccrc_errors),
 361 },
 362 {
 363         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 364         .name =         "IEC958 Q-CRC Errors",
 365         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 366         .info =         snd_ak4114_in_error_info,
 367         .get =          snd_ak4114_in_error_get,
 368         .private_value = offsetof(struct ak4114, qcrc_errors),
 369 },
 370 {
 371         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 372         .name =         "IEC958 External Rate",
 373         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 374         .info =         snd_ak4114_rate_info,
 375         .get =          snd_ak4114_rate_get,
 376 },
 377 {
 378         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 379         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 380         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 381         .info =         snd_ak4114_spdif_mask_info,
 382         .get =          snd_ak4114_spdif_mask_get,
 383 },
 384 {
 385         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 386         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 387         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 388         .info =         snd_ak4114_spdif_info,
 389         .get =          snd_ak4114_spdif_playback_get,
 390         .put =          snd_ak4114_spdif_playback_put,
 391 },
 392 {
 393         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 394         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
 395         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 396         .info =         snd_ak4114_spdif_mask_info,
 397         .get =          snd_ak4114_spdif_mask_get,
 398 },
 399 {
 400         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 401         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
 402         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 403         .info =         snd_ak4114_spdif_info,
 404         .get =          snd_ak4114_spdif_get,
 405 },
 406 {
 407         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 408         .name =         "IEC958 Preamble Capture Default",
 409         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 410         .info =         snd_ak4114_spdif_pinfo,
 411         .get =          snd_ak4114_spdif_pget,
 412 },
 413 {
 414         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 415         .name =         "IEC958 Q-subcode Capture Default",
 416         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 417         .info =         snd_ak4114_spdif_qinfo,
 418         .get =          snd_ak4114_spdif_qget,
 419 },
 420 {
 421         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 422         .name =         "IEC958 Audio",
 423         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 424         .info =         snd_ak4114_in_bit_info,
 425         .get =          snd_ak4114_in_bit_get,
 426         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
 427 },
 428 {
 429         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 430         .name =         "IEC958 Non-PCM Bitstream",
 431         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 432         .info =         snd_ak4114_in_bit_info,
 433         .get =          snd_ak4114_in_bit_get,
 434         .private_value = (6<<8) | AK4114_REG_RCS0,
 435 },
 436 {
 437         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 438         .name =         "IEC958 DTS Bitstream",
 439         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 440         .info =         snd_ak4114_in_bit_info,
 441         .get =          snd_ak4114_in_bit_get,
 442         .private_value = (3<<8) | AK4114_REG_RCS0,
 443 },
 444 {
 445         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 446         .name =         "IEC958 PPL Lock Status",
 447         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 448         .info =         snd_ak4114_in_bit_info,
 449         .get =          snd_ak4114_in_bit_get,
 450         .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
 451 }
 452 };
 453
 454
 455 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
 456                 struct snd_info_buffer *buffer)
 457 {
 458         struct ak4114 *ak4114 = entry->private_data;
 459         int reg, val;
 460         /* all ak4114 registers 0x00 - 0x1f */
 461         for (reg = 0; reg < 0x20; reg++) {
 462                 val = reg_read(ak4114, reg);
 463                 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
 464         }
 465 }
 466
 467 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
 468 {
 469         struct snd_info_entry *entry;
 470         if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
 471                 snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
 472 }
 473
 474 int snd_ak4114_build(struct ak4114 *ak4114,
 475                      struct snd_pcm_substream *ply_substream,
 476                      struct snd_pcm_substream *cap_substream)
 477 {
 478         struct snd_kcontrol *kctl;
 479         unsigned int idx;
 480         int err;
 481
 482         if (snd_BUG_ON(!cap_substream))
 483                 return -EINVAL;
 484         ak4114->playback_substream = ply_substream;
 485         ak4114->capture_substream = cap_substream;
 486         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
 487                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
 488                 if (kctl == NULL)
 489                         return -ENOMEM;
 490                 if (strstr(kctl->id.name, "Playback")) {
 491                         if (ply_substream == NULL) {
 492                                 snd_ctl_free_one(kctl);
 493                                 ak4114->kctls[idx] = NULL;
 494                                 continue;
 495                         }
 496                         kctl->id.device = ply_substream->pcm->device;
 497                         kctl->id.subdevice = ply_substream->number;
 498                 } else {
 499                         kctl->id.device = cap_substream->pcm->device;
 500                         kctl->id.subdevice = cap_substream->number;
 501                 }
 502                 err = snd_ctl_add(ak4114->card, kctl);
 503                 if (err < 0)
 504                         return err;
 505                 ak4114->kctls[idx] = kctl;
 506         }
 507         snd_ak4114_proc_init(ak4114);
 508         /* trigger workq */
 509         schedule_delayed_work(&ak4114->work, HZ / 10);
 510         return 0;
 511 }
 512 EXPORT_SYMBOL(snd_ak4114_build);
 513
 514 /* notify kcontrols if any parameters are changed */
 515 static void ak4114_notify(struct ak4114 *ak4114,
 516                           unsigned char rcs0, unsigned char rcs1,
 517                           unsigned char c0, unsigned char c1)
 518 {
 519         if (!ak4114->kctls[0])
 520                 return;
 521
 522         if (rcs0 & AK4114_PAR)
 523                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 524                                &ak4114->kctls[0]->id);
 525         if (rcs0 & AK4114_V)
 526                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 527                                &ak4114->kctls[1]->id);
 528         if (rcs1 & AK4114_CCRC)
 529                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 530                                &ak4114->kctls[2]->id);
 531         if (rcs1 & AK4114_QCRC)
 532                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 533                                &ak4114->kctls[3]->id);
 534
 535         /* rate change */
 536         if (c1 & 0xf0)
 537                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 538                                &ak4114->kctls[4]->id);
 539
 540         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
 541                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 542                                &ak4114->kctls[9]->id);
 543         if (c0 & AK4114_QINT)
 544                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 545                                &ak4114->kctls[10]->id);
 546
 547         if (c0 & AK4114_AUDION)
 548                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 549                                &ak4114->kctls[11]->id);
 550         if (c0 & AK4114_AUTO)
 551                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 552                                &ak4114->kctls[12]->id);
 553         if (c0 & AK4114_DTSCD)
 554                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 555                                &ak4114->kctls[13]->id);
 556         if (c0 & AK4114_UNLCK)
 557                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
 558                                &ak4114->kctls[14]->id);
 559 }
 560
 561 int snd_ak4114_external_rate(struct ak4114 *ak4114)
 562 {
 563         unsigned char rcs1;
 564
 565         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 566         return external_rate(rcs1);
 567 }
 568 EXPORT_SYMBOL(snd_ak4114_external_rate);
 569
 570 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
 571 {
 572         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
 573         unsigned long _flags;
 574         int res = 0;
 575         unsigned char rcs0, rcs1;
 576         unsigned char c0, c1;
 577
 578         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
 579         if (flags & AK4114_CHECK_NO_STAT)
 580                 goto __rate;
 581         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
 582         spin_lock_irqsave(&ak4114->lock, _flags);
 583         if (rcs0 & AK4114_PAR)
 584                 ak4114->parity_errors++;
 585         if (rcs1 & AK4114_V)
 586                 ak4114->v_bit_errors++;
 587         if (rcs1 & AK4114_CCRC)
 588                 ak4114->ccrc_errors++;
 589         if (rcs1 & AK4114_QCRC)
 590                 ak4114->qcrc_errors++;
 591         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
 592                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
 593         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
 594         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
 595         ak4114->rcs1 = rcs1;
 596         spin_unlock_irqrestore(&ak4114->lock, _flags);
 597
 598         ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
 599         if (ak4114->change_callback && (c0 | c1) != 0)
 600                 ak4114->change_callback(ak4114, c0, c1);
 601
 602       __rate:
 603         /* compare rate */
 604         res = external_rate(rcs1);
 605         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
 606                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
 607                 if (snd_pcm_running(ak4114->capture_substream)) {
 608                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
 609                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
 610                         res = 1;
 611                 }
 612                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
 613         }
 614         return res;
 615 }
 616 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
 617
 618 static void ak4114_stats(struct work_struct *work)
 619 {
 620         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
 621
 622         if (atomic_inc_return(&chip->wq_processing) == 1)
 623                 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
 624         if (atomic_dec_and_test(&chip->wq_processing))
 625                 schedule_delayed_work(&chip->work, HZ / 10);
 626 }
 627
 628 #ifdef CONFIG_PM
 629 void snd_ak4114_suspend(struct ak4114 *chip)
 630 {
 631         atomic_inc(&chip->wq_processing); /* don't schedule new work */
 632         cancel_delayed_work_sync(&chip->work);
 633 }
 634 EXPORT_SYMBOL(snd_ak4114_suspend);
 635
 636 void snd_ak4114_resume(struct ak4114 *chip)
 637 {
 638         atomic_dec(&chip->wq_processing);
 639         snd_ak4114_reinit(chip);
 640 }
 641 EXPORT_SYMBOL(snd_ak4114_resume);
 642 #endif