git.oblomov.eu Git - linux-2.6/blob - 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 <sound/driver.h>
  25 #include <linux/time.h>
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include "au88x0.h"
  30
  31 #define VORTEX_PCM_TYPE(x) (x->name[40])
  32
  33 /* hardware definition */
  34 static snd_pcm_hardware_t snd_vortex_playback_hw_adb = {
  35         .info =
  36             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  37              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  38              SNDRV_PCM_INFO_MMAP_VALID),
  39         .formats =
  40             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  41             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  42         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  43         .rate_min = 5000,
  44         .rate_max = 48000,
  45         .channels_min = 1,
  46 #ifdef CHIP_AU8830
  47         .channels_max = 4,
  48 #else
  49         .channels_max = 2,
  50 #endif
  51         .buffer_bytes_max = 0x10000,
  52         .period_bytes_min = 0x1,
  53         .period_bytes_max = 0x1000,
  54         .periods_min = 2,
  55         .periods_max = 32,
  56 };
  57
  58 #ifndef CHIP_AU8820
  59 static snd_pcm_hardware_t snd_vortex_playback_hw_a3d = {
  60         .info =
  61             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  62              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  63              SNDRV_PCM_INFO_MMAP_VALID),
  64         .formats =
  65             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  66             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  67         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  68         .rate_min = 5000,
  69         .rate_max = 48000,
  70         .channels_min = 1,
  71         .channels_max = 1,
  72         .buffer_bytes_max = 0x10000,
  73         .period_bytes_min = 0x100,
  74         .period_bytes_max = 0x1000,
  75         .periods_min = 2,
  76         .periods_max = 64,
  77 };
  78 #endif
  79 static snd_pcm_hardware_t snd_vortex_playback_hw_spdif = {
  80         .info =
  81             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  82              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  83              SNDRV_PCM_INFO_MMAP_VALID),
  84         .formats =
  85             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  86             SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | SNDRV_PCM_FMTBIT_MU_LAW |
  87             SNDRV_PCM_FMTBIT_A_LAW,
  88         .rates =
  89             SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
  90         .rate_min = 32000,
  91         .rate_max = 48000,
  92         .channels_min = 1,
  93         .channels_max = 2,
  94         .buffer_bytes_max = 0x10000,
  95         .period_bytes_min = 0x100,
  96         .period_bytes_max = 0x1000,
  97         .periods_min = 2,
  98         .periods_max = 64,
  99 };
 100
 101 #ifndef CHIP_AU8810
 102 static snd_pcm_hardware_t snd_vortex_playback_hw_wt = {
 103         .info = (SNDRV_PCM_INFO_MMAP |
 104                  SNDRV_PCM_INFO_INTERLEAVED |
 105                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
 106         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 107         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, // SNDRV_PCM_RATE_48000,
 108         .rate_min = 8000,
 109         .rate_max = 48000,
 110         .channels_min = 1,
 111         .channels_max = 2,
 112         .buffer_bytes_max = 0x10000,
 113         .period_bytes_min = 0x0400,
 114         .period_bytes_max = 0x1000,
 115         .periods_min = 2,
 116         .periods_max = 64,
 117 };
 118 #endif
 119 /* open callback */
 120 static int snd_vortex_pcm_open(snd_pcm_substream_t * substream)
 121 {
 122         vortex_t *vortex = snd_pcm_substream_chip(substream);
 123         snd_pcm_runtime_t *runtime = substream->runtime;
 124         int err;
 125
 126         /* Force equal size periods */
 127         if ((err =
 128              snd_pcm_hw_constraint_integer(runtime,
 129                                            SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 130                 return err;
 131         /* Avoid PAGE_SIZE boundary to fall inside of a period. */
 132         if ((err =
 133              snd_pcm_hw_constraint_pow2(runtime, 0,
 134                                         SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
 135                 return err;
 136
 137         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 138 #ifndef CHIP_AU8820
 139                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_A3D) {
 140                         runtime->hw = snd_vortex_playback_hw_a3d;
 141                 }
 142 #endif
 143                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_SPDIF) {
 144                         runtime->hw = snd_vortex_playback_hw_spdif;
 145                         switch (vortex->spdif_sr) {
 146                         case 32000:
 147                                 runtime->hw.rates = SNDRV_PCM_RATE_32000;
 148                                 break;
 149                         case 44100:
 150                                 runtime->hw.rates = SNDRV_PCM_RATE_44100;
 151                                 break;
 152                         case 48000:
 153                                 runtime->hw.rates = SNDRV_PCM_RATE_48000;
 154                                 break;
 155                         }
 156                 }
 157                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB
 158                     || VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_I2S)
 159                         runtime->hw = snd_vortex_playback_hw_adb;
 160                 substream->runtime->private_data = NULL;
 161         }
 162 #ifndef CHIP_AU8810
 163         else {
 164                 runtime->hw = snd_vortex_playback_hw_wt;
 165                 substream->runtime->private_data = NULL;
 166         }
 167 #endif
 168         return 0;
 169 }
 170
 171 /* close callback */
 172 static int snd_vortex_pcm_close(snd_pcm_substream_t * substream)
 173 {
 174         //vortex_t *chip = snd_pcm_substream_chip(substream);
 175         stream_t *stream = (stream_t *) substream->runtime->private_data;
 176
 177         // the hardware-specific codes will be here
 178         if (stream != NULL) {
 179                 stream->substream = NULL;
 180                 stream->nr_ch = 0;
 181         }
 182         substream->runtime->private_data = NULL;
 183         return 0;
 184 }
 185
 186 /* hw_params callback */
 187 static int
 188 snd_vortex_pcm_hw_params(snd_pcm_substream_t * substream,
 189                          snd_pcm_hw_params_t * hw_params)
 190 {
 191         vortex_t *chip = snd_pcm_substream_chip(substream);
 192         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 193         snd_pcm_sgbuf_t *sgbuf;
 194         int err;
 195
 196         // Alloc buffer memory.
 197         err =
 198             snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 199         if (err < 0) {
 200                 printk(KERN_ERR "Vortex: pcm page alloc failed!\n");
 201                 return err;
 202         }
 203         //sgbuf = (snd_pcm_sgbuf_t *) substream->runtime->dma_private;
 204         sgbuf = snd_pcm_substream_sgbuf(substream);
 205         /*
 206            printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params),
 207            params_period_bytes(hw_params), params_channels(hw_params));
 208          */
 209         spin_lock_irq(&chip->lock);
 210         // Make audio routes and config buffer DMA.
 211         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 212                 int dma, type = VORTEX_PCM_TYPE(substream->pcm);
 213                 /* Dealloc any routes. */
 214                 if (stream != NULL)
 215                         vortex_adb_allocroute(chip, stream->dma,
 216                                               stream->nr_ch, stream->dir,
 217                                               stream->type);
 218                 /* Alloc routes. */
 219                 dma =
 220                     vortex_adb_allocroute(chip, -1,
 221                                           params_channels(hw_params),
 222                                           substream->stream, type);
 223                 if (dma < 0) {
 224                         spin_unlock_irq(&chip->lock);
 225                         return dma;
 226                 }
 227                 stream = substream->runtime->private_data = &chip->dma_adb[dma];
 228                 stream->substream = substream;
 229                 /* Setup Buffers. */
 230                 vortex_adbdma_setbuffers(chip, dma, sgbuf,
 231                                          params_period_bytes(hw_params),
 232                                          params_periods(hw_params));
 233         }
 234 #ifndef CHIP_AU8810
 235         else {
 236                 /* if (stream != NULL)
 237                    vortex_wt_allocroute(chip, substream->number, 0); */
 238                 vortex_wt_allocroute(chip, substream->number,
 239                                      params_channels(hw_params));
 240                 stream = substream->runtime->private_data =
 241                     &chip->dma_wt[substream->number];
 242                 stream->dma = substream->number;
 243                 stream->substream = substream;
 244                 vortex_wtdma_setbuffers(chip, substream->number, sgbuf,
 245                                         params_period_bytes(hw_params),
 246                                         params_periods(hw_params));
 247         }
 248 #endif
 249         spin_unlock_irq(&chip->lock);
 250         return 0;
 251 }
 252
 253 /* hw_free callback */
 254 static int snd_vortex_pcm_hw_free(snd_pcm_substream_t * substream)
 255 {
 256         vortex_t *chip = snd_pcm_substream_chip(substream);
 257         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 258
 259         spin_lock_irq(&chip->lock);
 260         // Delete audio routes.
 261         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 262                 if (stream != NULL)
 263                         vortex_adb_allocroute(chip, stream->dma,
 264                                               stream->nr_ch, stream->dir,
 265                                               stream->type);
 266         }
 267 #ifndef CHIP_AU8810
 268         else {
 269                 if (stream != NULL)
 270                         vortex_wt_allocroute(chip, stream->dma, 0);
 271         }
 272 #endif
 273         substream->runtime->private_data = NULL;
 274         spin_unlock_irq(&chip->lock);
 275
 276         return snd_pcm_lib_free_pages(substream);
 277 }
 278
 279 /* prepare callback */
 280 static int snd_vortex_pcm_prepare(snd_pcm_substream_t * substream)
 281 {
 282         vortex_t *chip = snd_pcm_substream_chip(substream);
 283         snd_pcm_runtime_t *runtime = substream->runtime;
 284         stream_t *stream = (stream_t *) substream->runtime->private_data;
 285         int dma = stream->dma, fmt, dir;
 286
 287         // set up the hardware with the current configuration.
 288         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 289                 dir = 1;
 290         else
 291                 dir = 0;
 292         fmt = vortex_alsafmt_aspfmt(runtime->format);
 293         spin_lock_irq(&chip->lock);
 294         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 295                 vortex_adbdma_setmode(chip, dma, 1, dir, fmt, 0 /*? */ ,
 296                                       0);
 297                 vortex_adbdma_setstartbuffer(chip, dma, 0);
 298                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_SPDIF)
 299                         vortex_adb_setsrc(chip, dma, runtime->rate, dir);
 300         }
 301 #ifndef CHIP_AU8810
 302         else {
 303                 vortex_wtdma_setmode(chip, dma, 1, fmt, 0, 0);
 304                 // FIXME: Set rate (i guess using vortex_wt_writereg() somehow).
 305                 vortex_wtdma_setstartbuffer(chip, dma, 0);
 306         }
 307 #endif
 308         spin_unlock_irq(&chip->lock);
 309         return 0;
 310 }
 311
 312 /* trigger callback */
 313 static int snd_vortex_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
 314 {
 315         vortex_t *chip = snd_pcm_substream_chip(substream);
 316         stream_t *stream = (stream_t *) substream->runtime->private_data;
 317         int dma = stream->dma;
 318
 319         spin_lock(&chip->lock);
 320         switch (cmd) {
 321         case SNDRV_PCM_TRIGGER_START:
 322                 // do something to start the PCM engine
 323                 //printk(KERN_INFO "vortex: start %d\n", dma);
 324                 stream->fifo_enabled = 1;
 325                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 326                         vortex_adbdma_resetup(chip, dma);
 327                         vortex_adbdma_startfifo(chip, dma);
 328                 }
 329 #ifndef CHIP_AU8810
 330                 else {
 331                         printk(KERN_INFO "vortex: wt start %d\n", dma);
 332                         vortex_wtdma_startfifo(chip, dma);
 333                 }
 334 #endif
 335                 break;
 336         case SNDRV_PCM_TRIGGER_STOP:
 337                 // do something to stop the PCM engine
 338                 //printk(KERN_INFO "vortex: stop %d\n", dma);
 339                 stream->fifo_enabled = 0;
 340                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 341                         vortex_adbdma_pausefifo(chip, dma);
 342                 //vortex_adbdma_stopfifo(chip, dma);
 343 #ifndef CHIP_AU8810
 344                 else {
 345                         printk(KERN_INFO "vortex: wt stop %d\n", dma);
 346                         vortex_wtdma_stopfifo(chip, dma);
 347                 }
 348 #endif
 349                 break;
 350         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 351                 //printk(KERN_INFO "vortex: pause %d\n", dma);
 352                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 353                         vortex_adbdma_pausefifo(chip, dma);
 354 #ifndef CHIP_AU8810
 355                 else
 356                         vortex_wtdma_pausefifo(chip, dma);
 357 #endif
 358                 break;
 359         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 360                 //printk(KERN_INFO "vortex: resume %d\n", dma);
 361                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 362                         vortex_adbdma_resumefifo(chip, dma);
 363 #ifndef CHIP_AU8810
 364                 else
 365                         vortex_wtdma_resumefifo(chip, dma);
 366 #endif
 367                 break;
 368         default:
 369                 spin_unlock(&chip->lock);
 370                 return -EINVAL;
 371         }
 372         spin_unlock(&chip->lock);
 373         return 0;
 374 }
 375
 376 /* pointer callback */
 377 static snd_pcm_uframes_t snd_vortex_pcm_pointer(snd_pcm_substream_t * substream)
 378 {
 379         vortex_t *chip = snd_pcm_substream_chip(substream);
 380         stream_t *stream = (stream_t *) substream->runtime->private_data;
 381         int dma = stream->dma;
 382         snd_pcm_uframes_t current_ptr = 0;
 383
 384         spin_lock(&chip->lock);
 385         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 386                 current_ptr = vortex_adbdma_getlinearpos(chip, dma);
 387 #ifndef CHIP_AU8810
 388         else
 389                 current_ptr = vortex_wtdma_getlinearpos(chip, dma);
 390 #endif
 391         //printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
 392         spin_unlock(&chip->lock);
 393         return (bytes_to_frames(substream->runtime, current_ptr));
 394 }
 395
 396 /* Page callback. */
 397 /*
 398 static struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset) {
 399
 400
 401 }
 402 */
 403 /* operators */
 404 static snd_pcm_ops_t snd_vortex_playback_ops = {
 405         .open = snd_vortex_pcm_open,
 406         .close = snd_vortex_pcm_close,
 407         .ioctl = snd_pcm_lib_ioctl,
 408         .hw_params = snd_vortex_pcm_hw_params,
 409         .hw_free = snd_vortex_pcm_hw_free,
 410         .prepare = snd_vortex_pcm_prepare,
 411         .trigger = snd_vortex_pcm_trigger,
 412         .pointer = snd_vortex_pcm_pointer,
 413         .page = snd_pcm_sgbuf_ops_page,
 414 };
 415
 416 /*
 417 *  definitions of capture are omitted here...
 418 */
 419
 420 static char *vortex_pcm_prettyname[VORTEX_PCM_LAST] = {
 421         "AU88x0 ADB",
 422         "AU88x0 SPDIF",
 423         "AU88x0 A3D",
 424         "AU88x0 WT",
 425         "AU88x0 I2S",
 426 };
 427 static char *vortex_pcm_name[VORTEX_PCM_LAST] = {
 428         "adb",
 429         "spdif",
 430         "a3d",
 431         "wt",
 432         "i2s",
 433 };
 434
 435 /* SPDIF kcontrol */
 436
 437 static int snd_vortex_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 438 {
 439         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 440         uinfo->count = 1;
 441         return 0;
 442 }
 443
 444 static int snd_vortex_spdif_mask_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 445 {
 446         ucontrol->value.iec958.status[0] = 0xff;
 447         ucontrol->value.iec958.status[1] = 0xff;
 448         ucontrol->value.iec958.status[2] = 0xff;
 449         ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
 450         return 0;
 451 }
 452
 453 static int snd_vortex_spdif_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 454 {
 455         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 456         ucontrol->value.iec958.status[0] = 0x00;
 457         ucontrol->value.iec958.status[1] = IEC958_AES1_CON_ORIGINAL|IEC958_AES1_CON_DIGDIGCONV_ID;
 458         ucontrol->value.iec958.status[2] = 0x00;
 459         switch (vortex->spdif_sr) {
 460         case 32000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_32000; break;
 461         case 44100: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_44100; break;
 462         case 48000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_48000; break;
 463         }
 464         return 0;
 465 }
 466
 467 static int snd_vortex_spdif_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 468 {
 469         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 470         int spdif_sr = 48000;
 471         switch (ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) {
 472         case IEC958_AES3_CON_FS_32000: spdif_sr = 32000; break;
 473         case IEC958_AES3_CON_FS_44100: spdif_sr = 44100; break;
 474         case IEC958_AES3_CON_FS_48000: spdif_sr = 48000; break;
 475         }
 476         if (spdif_sr == vortex->spdif_sr)
 477                 return 0;
 478         vortex->spdif_sr = spdif_sr;
 479         vortex_spdif_init(vortex, vortex->spdif_sr, 1);
 480         return 1;
 481 }
 482
 483 /* spdif controls */
 484 static snd_kcontrol_new_t snd_vortex_mixer_spdif[] __devinitdata = {
 485         {
 486                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 487                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 488                 .info =         snd_vortex_spdif_info,
 489                 .get =          snd_vortex_spdif_get,
 490                 .put =          snd_vortex_spdif_put,
 491         },
 492         {
 493                 .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 494                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 495                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
 496                 .info =         snd_vortex_spdif_info,
 497                 .get =          snd_vortex_spdif_mask_get
 498         },
 499 };
 500
 501 /* create a pcm device */
 502 static int __devinit snd_vortex_new_pcm(vortex_t * chip, int idx, int nr)
 503 {
 504         snd_pcm_t *pcm;
 505         snd_kcontrol_t *kctl;
 506         int i;
 507         int err, nr_capt;
 508
 509         if ((chip == 0) || (idx < 0) || (idx > VORTEX_PCM_LAST))
 510                 return -ENODEV;
 511
 512         /* idx indicates which kind of PCM device. ADB, SPDIF, I2S and A3D share the
 513          * same dma engine. WT uses it own separate dma engine whcih cant capture. */
 514         if (idx == VORTEX_PCM_ADB)
 515                 nr_capt = nr;
 516         else
 517                 nr_capt = 0;
 518         if ((err =
 519              snd_pcm_new(chip->card, vortex_pcm_prettyname[idx], idx, nr,
 520                          nr_capt, &pcm)) < 0)
 521                 return err;
 522         strcpy(pcm->name, vortex_pcm_name[idx]);
 523         chip->pcm[idx] = pcm;
 524         // This is an evil hack, but it saves a lot of duplicated code.
 525         VORTEX_PCM_TYPE(pcm) = idx;
 526         pcm->private_data = chip;
 527         /* set operators */
 528         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 529                         &snd_vortex_playback_ops);
 530         if (idx == VORTEX_PCM_ADB)
 531                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 532                                 &snd_vortex_playback_ops);
 533
 534         /* pre-allocation of Scatter-Gather buffers */
 535
 536         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 537                                               snd_dma_pci_data(chip->pci_dev),
 538                                               0x10000, 0x10000);
 539
 540         if (VORTEX_PCM_TYPE(pcm) == VORTEX_PCM_SPDIF) {
 541                 for (i = 0; i < ARRAY_SIZE(snd_vortex_mixer_spdif); i++) {
 542                         kctl = snd_ctl_new1(&snd_vortex_mixer_spdif[i], chip);
 543                         if (!kctl)
 544                                 return -ENOMEM;
 545                         if ((err = snd_ctl_add(chip->card, kctl)) < 0)
 546                                 return err;
 547                 }
 548         }
 549         return 0;
 550 }