release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/au88x0/au88x0_pcm.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify
   3  *  it under the terms of the GNU General Public License as published by
   4  *  the Free Software Foundation; either version 2 of the License, or
   5  *  (at your option) any later version.
   6  *
   7  *  This program is distributed in the hope that it will be useful,
   8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *  GNU Library General Public License for more details.
  11  *
  12  *  You should have received a copy of the GNU General Public License
  13  *  along with this program; if not, write to the Free Software
  14  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  15  */
  16
  17 /*
  18  * Vortex PCM ALSA driver.
  19  *
  20  * Supports ADB and WT DMA. Unfortunately, WT channels do not run yet.
  21  * It remains stuck,and DMA transfers do not happen.
  22  */
  23 #include <sound/asoundef.h>
  24 #include <linux/time.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include "au88x0.h"
  29
  30 #define VORTEX_PCM_TYPE(x) (x->name[40])
  31
  32 /* hardware definition */
  33 static struct snd_pcm_hardware snd_vortex_playback_hw_adb = {
  34         .info =
  35             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  36              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  37              SNDRV_PCM_INFO_MMAP_VALID),
  38         .formats =
  39             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  40             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  41         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  42         .rate_min = 5000,
  43         .rate_max = 48000,
  44         .channels_min = 1,
  45         .channels_max = 2,
  46         .buffer_bytes_max = 0x10000,
  47         .period_bytes_min = 0x1,
  48         .period_bytes_max = 0x1000,
  49         .periods_min = 2,
  50         .periods_max = 32,
  51 };
  52
  53 #ifndef CHIP_AU8820
  54 static struct snd_pcm_hardware snd_vortex_playback_hw_a3d = {
  55         .info =
  56             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  57              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  58              SNDRV_PCM_INFO_MMAP_VALID),
  59         .formats =
  60             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  61             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  62         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  63         .rate_min = 5000,
  64         .rate_max = 48000,
  65         .channels_min = 1,
  66         .channels_max = 1,
  67         .buffer_bytes_max = 0x10000,
  68         .period_bytes_min = 0x100,
  69         .period_bytes_max = 0x1000,
  70         .periods_min = 2,
  71         .periods_max = 64,
  72 };
  73 #endif
  74 static struct snd_pcm_hardware snd_vortex_playback_hw_spdif = {
  75         .info =
  76             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  77              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  78              SNDRV_PCM_INFO_MMAP_VALID),
  79         .formats =
  80             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  81             SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | SNDRV_PCM_FMTBIT_MU_LAW |
  82             SNDRV_PCM_FMTBIT_A_LAW,
  83         .rates =
  84             SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
  85         .rate_min = 32000,
  86         .rate_max = 48000,
  87         .channels_min = 1,
  88         .channels_max = 2,
  89         .buffer_bytes_max = 0x10000,
  90         .period_bytes_min = 0x100,
  91         .period_bytes_max = 0x1000,
  92         .periods_min = 2,
  93         .periods_max = 64,
  94 };
  95
  96 #ifndef CHIP_AU8810
  97 static struct snd_pcm_hardware snd_vortex_playback_hw_wt = {
  98         .info = (SNDRV_PCM_INFO_MMAP |
  99                  SNDRV_PCM_INFO_INTERLEAVED |
 100                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
 101         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 102         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, // SNDRV_PCM_RATE_48000,
 103         .rate_min = 8000,
 104         .rate_max = 48000,
 105         .channels_min = 1,
 106         .channels_max = 2,
 107         .buffer_bytes_max = 0x10000,
 108         .period_bytes_min = 0x0400,
 109         .period_bytes_max = 0x1000,
 110         .periods_min = 2,
 111         .periods_max = 64,
 112 };
 113 #endif
 114 #ifdef CHIP_AU8830
 115 static unsigned int au8830_channels[3] = {
 116         1, 2, 4,
 117 };
 118
 119 static struct snd_pcm_hw_constraint_list hw_constraints_au8830_channels = {
 120         .count = ARRAY_SIZE(au8830_channels),
 121         .list = au8830_channels,
 122         .mask = 0,
 123 };
 124 #endif
 125 /* open callback */
 126 static int snd_vortex_pcm_open(struct snd_pcm_substream *substream)
 127 {
 128         vortex_t *vortex = snd_pcm_substream_chip(substream);
 129         struct snd_pcm_runtime *runtime = substream->runtime;
 130         int err;
 131
 132         /* Force equal size periods */
 133         if ((err =
 134              snd_pcm_hw_constraint_integer(runtime,
 135                                            SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 136                 return err;
 137         /* Avoid PAGE_SIZE boundary to fall inside of a period. */
 138         if ((err =
 139              snd_pcm_hw_constraint_pow2(runtime, 0,
 140                                         SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
 141                 return err;
 142
 143         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 144 #ifndef CHIP_AU8820
 145                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_A3D) {
 146                         runtime->hw = snd_vortex_playback_hw_a3d;
 147                 }
 148 #endif
 149                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_SPDIF) {
 150                         runtime->hw = snd_vortex_playback_hw_spdif;
 151                         switch (vortex->spdif_sr) {
 152                         case 32000:
 153                                 runtime->hw.rates = SNDRV_PCM_RATE_32000;
 154                                 break;
 155                         case 44100:
 156                                 runtime->hw.rates = SNDRV_PCM_RATE_44100;
 157                                 break;
 158                         case 48000:
 159                                 runtime->hw.rates = SNDRV_PCM_RATE_48000;
 160                                 break;
 161                         }
 162                 }
 163                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB
 164                     || VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_I2S)
 165                         runtime->hw = snd_vortex_playback_hw_adb;
 166 #ifdef CHIP_AU8830
 167                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 168                         VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB) {
 169                         runtime->hw.channels_max = 4;
 170                         snd_pcm_hw_constraint_list(runtime, 0,
 171                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 172                                 &hw_constraints_au8830_channels);
 173                 }
 174 #endif
 175                 substream->runtime->private_data = NULL;
 176         }
 177 #ifndef CHIP_AU8810
 178         else {
 179                 runtime->hw = snd_vortex_playback_hw_wt;
 180                 substream->runtime->private_data = NULL;
 181         }
 182 #endif
 183         return 0;
 184 }
 185
 186 /* close callback */
 187 static int snd_vortex_pcm_close(struct snd_pcm_substream *substream)
 188 {
 189         //vortex_t *chip = snd_pcm_substream_chip(substream);
 190         stream_t *stream = (stream_t *) substream->runtime->private_data;
 191
 192         // the hardware-specific codes will be here
 193         if (stream != NULL) {
 194                 stream->substream = NULL;
 195                 stream->nr_ch = 0;
 196         }
 197         substream->runtime->private_data = NULL;
 198         return 0;
 199 }
 200
 201 /* hw_params callback */
 202 static int
 203 snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 204                          struct snd_pcm_hw_params *hw_params)
 205 {
 206         vortex_t *chip = snd_pcm_substream_chip(substream);
 207         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 208         int err;
 209
 210         // Alloc buffer memory.
 211         err =
 212             snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 213         if (err < 0) {
 214                 printk(KERN_ERR "Vortex: pcm page alloc failed!\n");
 215                 return err;
 216         }
 217         /*
 218            printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params),
 219            params_period_bytes(hw_params), params_channels(hw_params));
 220          */
 221         spin_lock_irq(&chip->lock);
 222         // Make audio routes and config buffer DMA.
 223         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 224                 int dma, type = VORTEX_PCM_TYPE(substream->pcm);
 225                 /* Dealloc any routes. */
 226                 if (stream != NULL)
 227                         vortex_adb_allocroute(chip, stream->dma,
 228                                               stream->nr_ch, stream->dir,
 229                                               stream->type);
 230                 /* Alloc routes. */
 231                 dma =
 232                     vortex_adb_allocroute(chip, -1,
 233                                           params_channels(hw_params),
 234                                           substream->stream, type);
 235                 if (dma < 0) {
 236                         spin_unlock_irq(&chip->lock);
 237                         return dma;
 238                 }
 239                 stream = substream->runtime->private_data = &chip->dma_adb[dma];
 240                 stream->substream = substream;
 241                 /* Setup Buffers. */
 242                 vortex_adbdma_setbuffers(chip, dma,
 243                                          params_period_bytes(hw_params),
 244                                          params_periods(hw_params));
 245         }
 246 #ifndef CHIP_AU8810
 247         else {
 248                 /* if (stream != NULL)
 249                    vortex_wt_allocroute(chip, substream->number, 0); */
 250                 vortex_wt_allocroute(chip, substream->number,
 251                                      params_channels(hw_params));
 252                 stream = substream->runtime->private_data =
 253                     &chip->dma_wt[substream->number];
 254                 stream->dma = substream->number;
 255                 stream->substream = substream;
 256                 vortex_wtdma_setbuffers(chip, substream->number,
 257                                         params_period_bytes(hw_params),
 258                                         params_periods(hw_params));
 259         }
 260 #endif
 261         spin_unlock_irq(&chip->lock);
 262         return 0;
 263 }
 264
 265 /* hw_free callback */
 266 static int snd_vortex_pcm_hw_free(struct snd_pcm_substream *substream)
 267 {
 268         vortex_t *chip = snd_pcm_substream_chip(substream);
 269         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 270
 271         spin_lock_irq(&chip->lock);
 272         // Delete audio routes.
 273         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 274                 if (stream != NULL)
 275                         vortex_adb_allocroute(chip, stream->dma,
 276                                               stream->nr_ch, stream->dir,
 277                                               stream->type);
 278         }
 279 #ifndef CHIP_AU8810
 280         else {
 281                 if (stream != NULL)
 282                         vortex_wt_allocroute(chip, stream->dma, 0);
 283         }
 284 #endif
 285         substream->runtime->private_data = NULL;
 286         spin_unlock_irq(&chip->lock);
 287
 288         return snd_pcm_lib_free_pages(substream);
 289 }
 290
 291 /* prepare callback */
 292 static int snd_vortex_pcm_prepare(struct snd_pcm_substream *substream)
 293 {
 294         vortex_t *chip = snd_pcm_substream_chip(substream);
 295         struct snd_pcm_runtime *runtime = substream->runtime;
 296         stream_t *stream = (stream_t *) substream->runtime->private_data;
 297         int dma = stream->dma, fmt, dir;
 298
 299         // set up the hardware with the current configuration.
 300         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 301                 dir = 1;
 302         else
 303                 dir = 0;
 304         fmt = vortex_alsafmt_aspfmt(runtime->format);
 305         spin_lock_irq(&chip->lock);
 306         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 307                 vortex_adbdma_setmode(chip, dma, 1, dir, fmt, 0 /*? */ ,
 308                                       0);
 309                 vortex_adbdma_setstartbuffer(chip, dma, 0);
 310                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_SPDIF)
 311                         vortex_adb_setsrc(chip, dma, runtime->rate, dir);
 312         }
 313 #ifndef CHIP_AU8810
 314         else {
 315                 vortex_wtdma_setmode(chip, dma, 1, fmt, 0, 0);
 316                 vortex_wtdma_setstartbuffer(chip, dma, 0);
 317         }
 318 #endif
 319         spin_unlock_irq(&chip->lock);
 320         return 0;
 321 }
 322
 323 /* trigger callback */
 324 static int snd_vortex_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 325 {
 326         vortex_t *chip = snd_pcm_substream_chip(substream);
 327         stream_t *stream = (stream_t *) substream->runtime->private_data;
 328         int dma = stream->dma;
 329
 330         spin_lock(&chip->lock);
 331         switch (cmd) {
 332         case SNDRV_PCM_TRIGGER_START:
 333                 // do something to start the PCM engine
 334                 //printk(KERN_INFO "vortex: start %d\n", dma);
 335                 stream->fifo_enabled = 1;
 336                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 337                         vortex_adbdma_resetup(chip, dma);
 338                         vortex_adbdma_startfifo(chip, dma);
 339                 }
 340 #ifndef CHIP_AU8810
 341                 else {
 342                         printk(KERN_INFO "vortex: wt start %d\n", dma);
 343                         vortex_wtdma_startfifo(chip, dma);
 344                 }
 345 #endif
 346                 break;
 347         case SNDRV_PCM_TRIGGER_STOP:
 348                 // do something to stop the PCM engine
 349                 //printk(KERN_INFO "vortex: stop %d\n", dma);
 350                 stream->fifo_enabled = 0;
 351                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 352                         vortex_adbdma_pausefifo(chip, dma);
 353                 //vortex_adbdma_stopfifo(chip, dma);
 354 #ifndef CHIP_AU8810
 355                 else {
 356                         printk(KERN_INFO "vortex: wt stop %d\n", dma);
 357                         vortex_wtdma_stopfifo(chip, dma);
 358                 }
 359 #endif
 360                 break;
 361         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 362                 //printk(KERN_INFO "vortex: pause %d\n", dma);
 363                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 364                         vortex_adbdma_pausefifo(chip, dma);
 365 #ifndef CHIP_AU8810
 366                 else
 367                         vortex_wtdma_pausefifo(chip, dma);
 368 #endif
 369                 break;
 370         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 371                 //printk(KERN_INFO "vortex: resume %d\n", dma);
 372                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 373                         vortex_adbdma_resumefifo(chip, dma);
 374 #ifndef CHIP_AU8810
 375                 else
 376                         vortex_wtdma_resumefifo(chip, dma);
 377 #endif
 378                 break;
 379         default:
 380                 spin_unlock(&chip->lock);
 381                 return -EINVAL;
 382         }
 383         spin_unlock(&chip->lock);
 384         return 0;
 385 }
 386
 387 /* pointer callback */
 388 static snd_pcm_uframes_t snd_vortex_pcm_pointer(struct snd_pcm_substream *substream)
 389 {
 390         vortex_t *chip = snd_pcm_substream_chip(substream);
 391         stream_t *stream = (stream_t *) substream->runtime->private_data;
 392         int dma = stream->dma;
 393         snd_pcm_uframes_t current_ptr = 0;
 394
 395         spin_lock(&chip->lock);
 396         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 397                 current_ptr = vortex_adbdma_getlinearpos(chip, dma);
 398 #ifndef CHIP_AU8810
 399         else
 400                 current_ptr = vortex_wtdma_getlinearpos(chip, dma);
 401 #endif
 402         //printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
 403         spin_unlock(&chip->lock);
 404         return (bytes_to_frames(substream->runtime, current_ptr));
 405 }
 406
 407 /* operators */
 408 static struct snd_pcm_ops snd_vortex_playback_ops = {
 409         .open = snd_vortex_pcm_open,
 410         .close = snd_vortex_pcm_close,
 411         .ioctl = snd_pcm_lib_ioctl,
 412         .hw_params = snd_vortex_pcm_hw_params,
 413         .hw_free = snd_vortex_pcm_hw_free,
 414         .prepare = snd_vortex_pcm_prepare,
 415         .trigger = snd_vortex_pcm_trigger,
 416         .pointer = snd_vortex_pcm_pointer,
 417         .page = snd_pcm_sgbuf_ops_page,
 418 };
 419
 420 /*
 421 *  definitions of capture are omitted here...
 422 */
 423
 424 static char *vortex_pcm_prettyname[VORTEX_PCM_LAST] = {
 425         "AU88x0 ADB",
 426         "AU88x0 SPDIF",
 427         "AU88x0 A3D",
 428         "AU88x0 WT",
 429         "AU88x0 I2S",
 430 };
 431 static char *vortex_pcm_name[VORTEX_PCM_LAST] = {
 432         "adb",
 433         "spdif",
 434         "a3d",
 435         "wt",
 436         "i2s",
 437 };
 438
 439 /* SPDIF kcontrol */
 440
 441 static int snd_vortex_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 442 {
 443         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 444         uinfo->count = 1;
 445         return 0;
 446 }
 447
 448 static int snd_vortex_spdif_mask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 449 {
 450         ucontrol->value.iec958.status[0] = 0xff;
 451         ucontrol->value.iec958.status[1] = 0xff;
 452         ucontrol->value.iec958.status[2] = 0xff;
 453         ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
 454         return 0;
 455 }
 456
 457 static int snd_vortex_spdif_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 458 {
 459         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 460         ucontrol->value.iec958.status[0] = 0x00;
 461         ucontrol->value.iec958.status[1] = IEC958_AES1_CON_ORIGINAL|IEC958_AES1_CON_DIGDIGCONV_ID;
 462         ucontrol->value.iec958.status[2] = 0x00;
 463         switch (vortex->spdif_sr) {
 464         case 32000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_32000; break;
 465         case 44100: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_44100; break;
 466         case 48000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_48000; break;
 467         }
 468         return 0;
 469 }
 470
 471 static int snd_vortex_spdif_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 472 {
 473         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 474         int spdif_sr = 48000;
 475         switch (ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) {
 476         case IEC958_AES3_CON_FS_32000: spdif_sr = 32000; break;
 477         case IEC958_AES3_CON_FS_44100: spdif_sr = 44100; break;
 478         case IEC958_AES3_CON_FS_48000: spdif_sr = 48000; break;
 479         }
 480         if (spdif_sr == vortex->spdif_sr)
 481                 return 0;
 482         vortex->spdif_sr = spdif_sr;
 483         vortex_spdif_init(vortex, vortex->spdif_sr, 1);
 484         return 1;
 485 }
 486
 487 /* spdif controls */
 488 static struct snd_kcontrol_new snd_vortex_mixer_spdif[] __devinitdata = {
 489         {
 490                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 491                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 492                 .info =         snd_vortex_spdif_info,
 493                 .get =          snd_vortex_spdif_get,
 494                 .put =          snd_vortex_spdif_put,
 495         },
 496         {
 497                 .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 498                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 499                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
 500                 .info =         snd_vortex_spdif_info,
 501                 .get =          snd_vortex_spdif_mask_get
 502         },
 503 };
 504
 505 /* create a pcm device */
 506 static int __devinit snd_vortex_new_pcm(vortex_t *chip, int idx, int nr)
 507 {
 508         struct snd_pcm *pcm;
 509         struct snd_kcontrol *kctl;
 510         int i;
 511         int err, nr_capt;
 512
 513         if (!chip || idx < 0 || idx >= VORTEX_PCM_LAST)
 514                 return -ENODEV;
 515
 516         /* idx indicates which kind of PCM device. ADB, SPDIF, I2S and A3D share the
 517          * same dma engine. WT uses it own separate dma engine whcih cant capture. */
 518         if (idx == VORTEX_PCM_ADB)
 519                 nr_capt = nr;
 520         else
 521                 nr_capt = 0;
 522         err = snd_pcm_new(chip->card, vortex_pcm_prettyname[idx], idx, nr,
 523                           nr_capt, &pcm);
 524         if (err < 0)
 525                 return err;
 526         strcpy(pcm->name, vortex_pcm_name[idx]);
 527         chip->pcm[idx] = pcm;
 528         // This is an evil hack, but it saves a lot of duplicated code.
 529         VORTEX_PCM_TYPE(pcm) = idx;
 530         pcm->private_data = chip;
 531         /* set operators */
 532         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 533                         &snd_vortex_playback_ops);
 534         if (idx == VORTEX_PCM_ADB)
 535                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 536                                 &snd_vortex_playback_ops);
 537
 538         /* pre-allocation of Scatter-Gather buffers */
 539
 540         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 541                                               snd_dma_pci_data(chip->pci_dev),
 542                                               0x10000, 0x10000);
 543
 544         if (VORTEX_PCM_TYPE(pcm) == VORTEX_PCM_SPDIF) {
 545                 for (i = 0; i < ARRAY_SIZE(snd_vortex_mixer_spdif); i++) {
 546                         kctl = snd_ctl_new1(&snd_vortex_mixer_spdif[i], chip);
 547                         if (!kctl)
 548                                 return -ENOMEM;
 549                         if ((err = snd_ctl_add(chip->card, kctl)) < 0)
 550                                 return err;
 551                 }
 552         }
 553         return 0;
 554 }