sound/i2c/cs8427.c

   1 /*
   2  *  Routines for control of the CS8427 via i2c bus
   3  *  IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic
   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/init.h>
  26 #include <linux/bitrev.h>
  27 #include <asm/unaligned.h>
  28 #include <sound/core.h>
  29 #include <sound/control.h>
  30 #include <sound/pcm.h>
  31 #include <sound/cs8427.h>
  32 #include <sound/asoundef.h>
  33
  34 static void snd_cs8427_reset(struct snd_i2c_device *cs8427);
  35
  36 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  37 MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic");
  38 MODULE_LICENSE("GPL");
  39
  40 #define CS8427_ADDR                     (0x20>>1) /* fixed address */
  41
  42 struct cs8427_stream {
  43         struct snd_pcm_substream *substream;
  44         char hw_status[24];             /* hardware status */
  45         char def_status[24];            /* default status */
  46         char pcm_status[24];            /* PCM private status */
  47         char hw_udata[32];
  48         struct snd_kcontrol *pcm_ctl;
  49 };
  50
  51 struct cs8427 {
  52         unsigned char regmap[0x14];     /* map of first 1 + 13 registers */
  53         unsigned int rate;
  54         unsigned int reset_timeout;
  55         struct cs8427_stream playback;
  56         struct cs8427_stream capture;
  57 };
  58
  59 int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
  60                          unsigned char val)
  61 {
  62         int err;
  63         unsigned char buf[2];
  64
  65         buf[0] = reg & 0x7f;
  66         buf[1] = val;
  67         if ((err = snd_i2c_sendbytes(device, buf, 2)) != 2) {
  68                 snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x "
  69                            "to CS8427 (%i)\n", buf[0], buf[1], err);
  70                 return err < 0 ? err : -EIO;
  71         }
  72         return 0;
  73 }
  74
  75 EXPORT_SYMBOL(snd_cs8427_reg_write);
  76
  77 static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
  78 {
  79         int err;
  80         unsigned char buf;
  81
  82         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
  83                 snd_printk(KERN_ERR "unable to send register 0x%x byte "
  84                            "to CS8427\n", reg);
  85                 return err < 0 ? err : -EIO;
  86         }
  87         if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) {
  88                 snd_printk(KERN_ERR "unable to read register 0x%x byte "
  89                            "from CS8427\n", reg);
  90                 return err < 0 ? err : -EIO;
  91         }
  92         return buf;
  93 }
  94
  95 static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata)
  96 {
  97         struct cs8427 *chip = device->private_data;
  98         int err;
  99
 100         udata = udata ? CS8427_BSEL : 0;
 101         if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) {
 102                 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL;
 103                 chip->regmap[CS8427_REG_CSDATABUF] |= udata;
 104                 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF,
 105                                            chip->regmap[CS8427_REG_CSDATABUF]);
 106                 if (err < 0)
 107                         return err;
 108         }
 109         return 0;
 110 }
 111
 112 static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
 113                                     int udata,
 114                                     unsigned char *ndata,
 115                                     int count)
 116 {
 117         struct cs8427 *chip = device->private_data;
 118         char *hw_data = udata ?
 119                 chip->playback.hw_udata : chip->playback.hw_status;
 120         char data[32];
 121         int err, idx;
 122
 123         if (!memcmp(hw_data, ndata, count))
 124                 return 0;
 125         if ((err = snd_cs8427_select_corudata(device, udata)) < 0)
 126                 return err;
 127         memcpy(hw_data, ndata, count);
 128         if (udata) {
 129                 memset(data, 0, sizeof(data));
 130                 if (memcmp(hw_data, data, count) == 0) {
 131                         chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
 132                         chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS |
 133                                 CS8427_EFTUI;
 134                         err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
 135                                                    chip->regmap[CS8427_REG_UDATABUF]);
 136                         return err < 0 ? err : 0;
 137                 }
 138         }
 139         data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
 140         for (idx = 0; idx < count; idx++)
 141                 data[idx + 1] = bitrev8(ndata[idx]);
 142         if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
 143                 return -EIO;
 144         return 1;
 145 }
 146
 147 static void snd_cs8427_free(struct snd_i2c_device *device)
 148 {
 149         kfree(device->private_data);
 150 }
 151
 152 int snd_cs8427_create(struct snd_i2c_bus *bus,
 153                       unsigned char addr,
 154                       unsigned int reset_timeout,
 155                       struct snd_i2c_device **r_cs8427)
 156 {
 157         static unsigned char initvals1[] = {
 158           CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
 159           /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes,
 160              TCBL=output */
 161           CS8427_SWCLK | CS8427_TCBLDIR,
 162           /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs,
 163              normal stereo operation */
 164           0x00,
 165           /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial,
 166              Rx=>serial */
 167           CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
 168           /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs,
 169              output time base = OMCK, input time base = recovered input clock,
 170              recovered input clock source is ILRCK changed to AES3INPUT
 171              (workaround, see snd_cs8427_reset) */
 172           CS8427_RXDILRCK,
 173           /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S,
 174              24-bit, 64*Fsi */
 175           CS8427_SIDEL | CS8427_SILRPOL,
 176           /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format
 177              = I2S, 24-bit, 64*Fsi */
 178           CS8427_SODEL | CS8427_SOLRPOL,
 179         };
 180         static unsigned char initvals2[] = {
 181           CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
 182           /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence,
 183              biphase, parity status bits */
 184           /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/
 185           0xff, /* set everything */
 186           /* CS8427_REG_CSDATABUF:
 187              Registers 32-55 window to CS buffer
 188              Inhibit D->E transfers from overwriting first 5 bytes of CS data.
 189              Inhibit D->E transfers (all) of CS data.
 190              Allow E->F transfer of CS data.
 191              One byte mode; both A/B channels get same written CB data.
 192              A channel info is output to chip's EMPH* pin. */
 193           CS8427_CBMR | CS8427_DETCI,
 194           /* CS8427_REG_UDATABUF:
 195              Use internal buffer to transmit User (U) data.
 196              Chip's U pin is an output.
 197              Transmit all O's for user data.
 198              Inhibit D->E transfers.
 199              Inhibit E->F transfers. */
 200           CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
 201         };
 202         int err;
 203         struct cs8427 *chip;
 204         struct snd_i2c_device *device;
 205         unsigned char buf[24];
 206
 207         if ((err = snd_i2c_device_create(bus, "CS8427",
 208                                          CS8427_ADDR | (addr & 7),
 209                                          &device)) < 0)
 210                 return err;
 211         chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
 212         if (chip == NULL) {
 213                 snd_i2c_device_free(device);
 214                 return -ENOMEM;
 215         }
 216         device->private_free = snd_cs8427_free;
 217
 218         snd_i2c_lock(bus);
 219         err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
 220         if (err != CS8427_VER8427A) {
 221                 /* give second chance */
 222                 snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: "
 223                            "let me try again...\n", err);
 224                 err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
 225         }
 226         if (err != CS8427_VER8427A) {
 227                 snd_i2c_unlock(bus);
 228                 snd_printk(KERN_ERR "unable to find CS8427 signature "
 229                            "(expected 0x%x, read 0x%x),\n",
 230                            CS8427_VER8427A, err);
 231                 snd_printk(KERN_ERR "   initialization is not completed\n");
 232                 return -EFAULT;
 233         }
 234         /* turn off run bit while making changes to configuration */
 235         err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00);
 236         if (err < 0)
 237                 goto __fail;
 238         /* send initial values */
 239         memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
 240         if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
 241                 err = err < 0 ? err : -EIO;
 242                 goto __fail;
 243         }
 244         /* Turn off CS8427 interrupt stuff that is not used in hardware */
 245         memset(buf, 0, 7);
 246         /* from address 9 to 15 */
 247         buf[0] = 9;     /* register */
 248         if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
 249                 goto __fail;
 250         /* send transfer initialization sequence */
 251         memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
 252         if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
 253                 err = err < 0 ? err : -EIO;
 254                 goto __fail;
 255         }
 256         /* write default channel status bytes */
 257         put_unaligned_le32(SNDRV_PCM_DEFAULT_CON_SPDIF, buf);
 258         memset(buf + 4, 0, 24 - 4);
 259         if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
 260                 goto __fail;
 261         memcpy(chip->playback.def_status, buf, 24);
 262         memcpy(chip->playback.pcm_status, buf, 24);
 263         snd_i2c_unlock(bus);
 264
 265         /* turn on run bit and rock'n'roll */
 266         if (reset_timeout < 1)
 267                 reset_timeout = 1;
 268         chip->reset_timeout = reset_timeout;
 269         snd_cs8427_reset(device);
 270
 271 #if 0   // it's nice for read tests
 272         {
 273         char buf[128];
 274         int xx;
 275         buf[0] = 0x81;
 276         snd_i2c_sendbytes(device, buf, 1);
 277         snd_i2c_readbytes(device, buf, 127);
 278         for (xx = 0; xx < 127; xx++)
 279                 printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
 280         }
 281 #endif
 282
 283         if (r_cs8427)
 284                 *r_cs8427 = device;
 285         return 0;
 286
 287       __fail:
 288         snd_i2c_unlock(bus);
 289         snd_i2c_device_free(device);
 290         return err < 0 ? err : -EIO;
 291 }
 292
 293 EXPORT_SYMBOL(snd_cs8427_create);
 294
 295 /*
 296  * Reset the chip using run bit, also lock PLL using ILRCK and
 297  * put back AES3INPUT. This workaround is described in latest
 298  * CS8427 datasheet, otherwise TXDSERIAL will not work.
 299  */
 300 static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
 301 {
 302         struct cs8427 *chip;
 303         unsigned long end_time;
 304         int data, aes3input = 0;
 305
 306         if (snd_BUG_ON(!cs8427))
 307                 return;
 308         chip = cs8427->private_data;
 309         snd_i2c_lock(cs8427->bus);
 310         if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) ==
 311             CS8427_RXDAES3INPUT)  /* AES3 bit is set */
 312                 aes3input = 1;
 313         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
 314         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
 315                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
 316         udelay(200);
 317         chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
 318         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
 319                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
 320         udelay(200);
 321         snd_i2c_unlock(cs8427->bus);
 322         end_time = jiffies + chip->reset_timeout;
 323         while (time_after_eq(end_time, jiffies)) {
 324                 snd_i2c_lock(cs8427->bus);
 325                 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
 326                 snd_i2c_unlock(cs8427->bus);
 327                 if (!(data & CS8427_UNLOCK))
 328                         break;
 329                 schedule_timeout_uninterruptible(1);
 330         }
 331         snd_i2c_lock(cs8427->bus);
 332         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
 333         if (aes3input)
 334                 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
 335         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
 336                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
 337         snd_i2c_unlock(cs8427->bus);
 338 }
 339
 340 static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol,
 341                                      struct snd_ctl_elem_info *uinfo)
 342 {
 343         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 344         uinfo->count = 1;
 345         uinfo->value.integer.min = 0;
 346         uinfo->value.integer.max = 255;
 347         return 0;
 348 }
 349
 350 static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
 351                                     struct snd_ctl_elem_value *ucontrol)
 352 {
 353         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
 354         int data;
 355
 356         snd_i2c_lock(device->bus);
 357         data = snd_cs8427_reg_read(device, kcontrol->private_value);
 358         snd_i2c_unlock(device->bus);
 359         if (data < 0)
 360                 return data;
 361         ucontrol->value.integer.value[0] = data;
 362         return 0;
 363 }
 364
 365 static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol,
 366                                     struct snd_ctl_elem_info *uinfo)
 367 {
 368         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 369         uinfo->count = 10;
 370         return 0;
 371 }
 372
 373 static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
 374                                    struct snd_ctl_elem_value *ucontrol)
 375 {
 376         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
 377         unsigned char reg = CS8427_REG_QSUBCODE;
 378         int err;
 379
 380         snd_i2c_lock(device->bus);
 381         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
 382                 snd_printk(KERN_ERR "unable to send register 0x%x byte "
 383                            "to CS8427\n", reg);
 384                 snd_i2c_unlock(device->bus);
 385                 return err < 0 ? err : -EIO;
 386         }
 387         err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10);
 388         if (err != 10) {
 389                 snd_printk(KERN_ERR "unable to read Q-subcode bytes "
 390                            "from CS8427\n");
 391                 snd_i2c_unlock(device->bus);
 392                 return err < 0 ? err : -EIO;
 393         }
 394         snd_i2c_unlock(device->bus);
 395         return 0;
 396 }
 397
 398 static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol,
 399                                  struct snd_ctl_elem_info *uinfo)
 400 {
 401         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 402         uinfo->count = 1;
 403         return 0;
 404 }
 405
 406 static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol,
 407                                 struct snd_ctl_elem_value *ucontrol)
 408 {
 409         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
 410         struct cs8427 *chip = device->private_data;
 411
 412         snd_i2c_lock(device->bus);
 413         memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24);
 414         snd_i2c_unlock(device->bus);
 415         return 0;
 416 }
 417
 418 static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
 419                                 struct snd_ctl_elem_value *ucontrol)
 420 {
 421         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
 422         struct cs8427 *chip = device->private_data;
 423         unsigned char *status = kcontrol->private_value ?
 424                 chip->playback.pcm_status : chip->playback.def_status;
 425         struct snd_pcm_runtime *runtime = chip->playback.substream ?
 426                 chip->playback.substream->runtime : NULL;
 427         int err, change;
 428
 429         snd_i2c_lock(device->bus);
 430         change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
 431         memcpy(status, ucontrol->value.iec958.status, 24);
 432         if (change && (kcontrol->private_value ?
 433                        runtime != NULL : runtime == NULL)) {
 434                 err = snd_cs8427_send_corudata(device, 0, status, 24);
 435                 if (err < 0)
 436                         change = err;
 437         }
 438         snd_i2c_unlock(device->bus);
 439         return change;
 440 }
 441
 442 static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol,
 443                                       struct snd_ctl_elem_info *uinfo)
 444 {
 445         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 446         uinfo->count = 1;
 447         return 0;
 448 }
 449
 450 static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol,
 451                                       struct snd_ctl_elem_value *ucontrol)
 452 {
 453         memset(ucontrol->value.iec958.status, 0xff, 24);
 454         return 0;
 455 }
 456
 457 static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
 458 {
 459         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 460         .info =         snd_cs8427_in_status_info,
 461         .name =         "IEC958 CS8427 Input Status",
 462         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
 463                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
 464         .get =          snd_cs8427_in_status_get,
 465         .private_value = 15,
 466 },
 467 {
 468         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 469         .info =         snd_cs8427_in_status_info,
 470         .name =         "IEC958 CS8427 Error Status",
 471         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
 472                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
 473         .get =          snd_cs8427_in_status_get,
 474         .private_value = 16,
 475 },
 476 {
 477         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 478         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 479         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
 480         .info =         snd_cs8427_spdif_mask_info,
 481         .get =          snd_cs8427_spdif_mask_get,
 482 },
 483 {
 484         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 485         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 486         .info =         snd_cs8427_spdif_info,
 487         .get =          snd_cs8427_spdif_get,
 488         .put =          snd_cs8427_spdif_put,
 489         .private_value = 0
 490 },
 491 {
 492         .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
 493                          SNDRV_CTL_ELEM_ACCESS_INACTIVE),
 494         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 495         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
 496         .info =         snd_cs8427_spdif_info,
 497         .get =          snd_cs8427_spdif_get,
 498         .put =          snd_cs8427_spdif_put,
 499         .private_value = 1
 500 },
 501 {
 502         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 503         .info =         snd_cs8427_qsubcode_info,
 504         .name =         "IEC958 Q-subcode Capture Default",
 505         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
 506                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
 507         .get =          snd_cs8427_qsubcode_get
 508 }};
 509
 510 int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
 511                             struct snd_pcm_substream *play_substream,
 512                             struct snd_pcm_substream *cap_substream)
 513 {
 514         struct cs8427 *chip = cs8427->private_data;
 515         struct snd_kcontrol *kctl;
 516         unsigned int idx;
 517         int err;
 518
 519         if (snd_BUG_ON(!play_substream || !cap_substream))
 520                 return -EINVAL;
 521         for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
 522                 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
 523                 if (kctl == NULL)
 524                         return -ENOMEM;
 525                 kctl->id.device = play_substream->pcm->device;
 526                 kctl->id.subdevice = play_substream->number;
 527                 err = snd_ctl_add(cs8427->bus->card, kctl);
 528                 if (err < 0)
 529                         return err;
 530                 if (! strcmp(kctl->id.name,
 531                              SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
 532                         chip->playback.pcm_ctl = kctl;
 533         }
 534
 535         chip->playback.substream = play_substream;
 536         chip->capture.substream = cap_substream;
 537         if (snd_BUG_ON(!chip->playback.pcm_ctl))
 538                 return -EIO;
 539         return 0;
 540 }
 541
 542 EXPORT_SYMBOL(snd_cs8427_iec958_build);
 543
 544 int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
 545 {
 546         struct cs8427 *chip;
 547
 548         if (snd_BUG_ON(!cs8427))
 549                 return -ENXIO;
 550         chip = cs8427->private_data;
 551         if (active)
 552                 memcpy(chip->playback.pcm_status,
 553                        chip->playback.def_status, 24);
 554         chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
 555         snd_ctl_notify(cs8427->bus->card,
 556                        SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
 557                        &chip->playback.pcm_ctl->id);
 558         return 0;
 559 }
 560
 561 EXPORT_SYMBOL(snd_cs8427_iec958_active);
 562
 563 int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
 564 {
 565         struct cs8427 *chip;
 566         char *status;
 567         int err, reset;
 568
 569         if (snd_BUG_ON(!cs8427))
 570                 return -ENXIO;
 571         chip = cs8427->private_data;
 572         status = chip->playback.pcm_status;
 573         snd_i2c_lock(cs8427->bus);
 574         if (status[0] & IEC958_AES0_PROFESSIONAL) {
 575                 status[0] &= ~IEC958_AES0_PRO_FS;
 576                 switch (rate) {
 577                 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break;
 578                 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break;
 579                 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break;
 580                 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
 581                 }
 582         } else {
 583                 status[3] &= ~IEC958_AES3_CON_FS;
 584                 switch (rate) {
 585                 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break;
 586                 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break;
 587                 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break;
 588                 }
 589         }
 590         err = snd_cs8427_send_corudata(cs8427, 0, status, 24);
 591         if (err > 0)
 592                 snd_ctl_notify(cs8427->bus->card,
 593                                SNDRV_CTL_EVENT_MASK_VALUE,
 594                                &chip->playback.pcm_ctl->id);
 595         reset = chip->rate != rate;
 596         chip->rate = rate;
 597         snd_i2c_unlock(cs8427->bus);
 598         if (reset)
 599                 snd_cs8427_reset(cs8427);
 600         return err < 0 ? err : 0;
 601 }
 602
 603 EXPORT_SYMBOL(snd_cs8427_iec958_pcm);
 604
 605 static int __init alsa_cs8427_module_init(void)
 606 {
 607         return 0;
 608 }
 609
 610 static void __exit alsa_cs8427_module_exit(void)
 611 {
 612 }
 613
 614 module_init(alsa_cs8427_module_init)
 615 module_exit(alsa_cs8427_module_exit)