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