git.oblomov.eu Git - linux-2.6/blob - sound/drivers/vx/vx_pcm.c

   1 /*
   2  * Driver for Digigram VX soundcards
   3  *
   4  * PCM part
   5  *
   6  * Copyright (c) 2002,2003 by Takashi Iwai <tiwai@suse.de>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  *
  23  * STRATEGY
  24  *  for playback, we send series of "chunks", which size is equal with the
  25  *  IBL size, typically 126 samples.  at each end of chunk, the end-of-buffer
  26  *  interrupt is notified, and the interrupt handler will feed the next chunk.
  27  *
  28  *  the current position is calculated from the sample count RMH.
  29  *  pipe->transferred is the counter of data which has been already transferred.
  30  *  if this counter reaches to the period size, snd_pcm_period_elapsed() will
  31  *  be issued.
  32  *
  33  *  for capture, the situation is much easier.
  34  *  to get a low latency response, we'll check the capture streams at each
  35  *  interrupt (capture stream has no EOB notification).  if the pending
  36  *  data is accumulated to the period size, snd_pcm_period_elapsed() is
  37  *  called and the pointer is updated.
  38  *
  39  *  the current point of read buffer is kept in pipe->hw_ptr.  note that
  40  *  this is in bytes.
  41  *
  42  *
  43  * TODO
  44  *  - linked trigger for full-duplex mode.
  45  *  - scheduled action on the stream.
  46  */
  47
  48 #include <sound/driver.h>
  49 #include <linux/slab.h>
  50 #include <linux/vmalloc.h>
  51 #include <linux/delay.h>
  52 #include <sound/core.h>
  53 #include <sound/asoundef.h>
  54 #include <sound/pcm.h>
  55 #include <sound/vx_core.h>
  56 #include "vx_cmd.h"
  57
  58
  59 /*
  60  * we use a vmalloc'ed (sg-)buffer
  61  */
  62
  63 /* get the physical page pointer on the given offset */
  64 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, unsigned long offset)
  65 {
  66         void *pageptr = subs->runtime->dma_area + offset;
  67         return vmalloc_to_page(pageptr);
  68 }
  69
  70 /*
  71  * allocate a buffer via vmalloc_32().
  72  * called from hw_params
  73  * NOTE: this may be called not only once per pcm open!
  74  */
  75 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
  76 {
  77         snd_pcm_runtime_t *runtime = subs->runtime;
  78         if (runtime->dma_area) {
  79                 /* already allocated */
  80                 if (runtime->dma_bytes >= size)
  81                         return 0; /* already enough large */
  82                 vfree_nocheck(runtime->dma_area); /* bypass the memory wrapper */
  83         }
  84         runtime->dma_area = vmalloc_32(size);
  85         if (! runtime->dma_area)
  86                 return -ENOMEM;
  87         memset(runtime->dma_area, 0, size);
  88         runtime->dma_bytes = size;
  89         return 1; /* changed */
  90 }
  91
  92 /*
  93  * free the buffer.
  94  * called from hw_free callback
  95  * NOTE: this may be called not only once per pcm open!
  96  */
  97 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
  98 {
  99         snd_pcm_runtime_t *runtime = subs->runtime;
 100         if (runtime->dma_area) {
 101                 vfree_nocheck(runtime->dma_area); /* bypass the memory wrapper */
 102                 runtime->dma_area = NULL;
 103         }
 104         return 0;
 105 }
 106
 107
 108 /*
 109  * read three pending pcm bytes via inb()
 110  */
 111 static void vx_pcm_read_per_bytes(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe)
 112 {
 113         int offset = pipe->hw_ptr;
 114         unsigned char *buf = (unsigned char *)(runtime->dma_area + offset);
 115         *buf++ = vx_inb(chip, RXH);
 116         if (++offset >= pipe->buffer_bytes) {
 117                 offset = 0;
 118                 buf = (unsigned char *)runtime->dma_area;
 119         }
 120         *buf++ = vx_inb(chip, RXM);
 121         if (++offset >= pipe->buffer_bytes) {
 122                 offset = 0;
 123                 buf = (unsigned char *)runtime->dma_area;
 124         }
 125         *buf++ = vx_inb(chip, RXL);
 126         if (++offset >= pipe->buffer_bytes) {
 127                 offset = 0;
 128                 buf = (unsigned char *)runtime->dma_area;
 129         }
 130         pipe->hw_ptr = offset;
 131 }
 132
 133 /*
 134  * vx_set_pcx_time - convert from the PC time to the RMH status time.
 135  * @pc_time: the pointer for the PC-time to set
 136  * @dsp_time: the pointer for RMH status time array
 137  */
 138 static void vx_set_pcx_time(vx_core_t *chip, pcx_time_t *pc_time, unsigned int *dsp_time)
 139 {
 140         dsp_time[0] = (unsigned int)((*pc_time) >> 24) & PCX_TIME_HI_MASK;
 141         dsp_time[1] = (unsigned int)(*pc_time) &  MASK_DSP_WORD;
 142 }
 143
 144 /*
 145  * vx_set_differed_time - set the differed time if specified
 146  * @rmh: the rmh record to modify
 147  * @pipe: the pipe to be checked
 148  *
 149  * if the pipe is programmed with the differed time, set the DSP time
 150  * on the rmh and changes its command length.
 151  *
 152  * returns the increase of the command length.
 153  */
 154 static int vx_set_differed_time(vx_core_t *chip, struct vx_rmh *rmh, vx_pipe_t *pipe)
 155 {
 156         /* Update The length added to the RMH command by the timestamp */
 157         if (! (pipe->differed_type & DC_DIFFERED_DELAY))
 158                 return 0;
 159
 160         /* Set the T bit */
 161         rmh->Cmd[0] |= DSP_DIFFERED_COMMAND_MASK;
 162
 163         /* Time stamp is the 1st following parameter */
 164         vx_set_pcx_time(chip, &pipe->pcx_time, &rmh->Cmd[1]);
 165
 166         /* Add the flags to a notified differed command */
 167         if (pipe->differed_type & DC_NOTIFY_DELAY)
 168                 rmh->Cmd[1] |= NOTIFY_MASK_TIME_HIGH ;
 169
 170         /* Add the flags to a multiple differed command */
 171         if (pipe->differed_type & DC_MULTIPLE_DELAY)
 172                 rmh->Cmd[1] |= MULTIPLE_MASK_TIME_HIGH;
 173
 174         /* Add the flags to a stream-time differed command */
 175         if (pipe->differed_type & DC_STREAM_TIME_DELAY)
 176                 rmh->Cmd[1] |= STREAM_MASK_TIME_HIGH;
 177
 178         rmh->LgCmd += 2;
 179         return 2;
 180 }
 181
 182 /*
 183  * vx_set_stream_format - send the stream format command
 184  * @pipe: the affected pipe
 185  * @data: format bitmask
 186  */
 187 static int vx_set_stream_format(vx_core_t *chip, vx_pipe_t *pipe, unsigned int data)
 188 {
 189         struct vx_rmh rmh;
 190
 191         vx_init_rmh(&rmh, pipe->is_capture ?
 192                     CMD_FORMAT_STREAM_IN : CMD_FORMAT_STREAM_OUT);
 193         rmh.Cmd[0] |= pipe->number << FIELD_SIZE;
 194
 195         /* Command might be longer since we may have to add a timestamp */
 196         vx_set_differed_time(chip, &rmh, pipe);
 197
 198         rmh.Cmd[rmh.LgCmd] = (data & 0xFFFFFF00) >> 8;
 199         rmh.Cmd[rmh.LgCmd + 1] = (data & 0xFF) << 16 /*| (datal & 0xFFFF00) >> 8*/;
 200         rmh.LgCmd += 2;
 201
 202         return vx_send_msg(chip, &rmh);
 203 }
 204
 205
 206 /*
 207  * vx_set_format - set the format of a pipe
 208  * @pipe: the affected pipe
 209  * @runtime: pcm runtime instance to be referred
 210  *
 211  * returns 0 if successful, or a negative error code.
 212  */
 213 static int vx_set_format(vx_core_t *chip, vx_pipe_t *pipe,
 214                          snd_pcm_runtime_t *runtime)
 215 {
 216         unsigned int header = HEADER_FMT_BASE;
 217
 218         if (runtime->channels == 1)
 219                 header |= HEADER_FMT_MONO;
 220         if (snd_pcm_format_little_endian(runtime->format))
 221                 header |= HEADER_FMT_INTEL;
 222         if (runtime->rate < 32000 && runtime->rate > 11025)
 223                 header |= HEADER_FMT_UPTO32;
 224         else if (runtime->rate <= 11025)
 225                 header |= HEADER_FMT_UPTO11;
 226
 227         switch (snd_pcm_format_physical_width(runtime->format)) {
 228         // case 8: break;
 229         case 16: header |= HEADER_FMT_16BITS; break;
 230         case 24: header |= HEADER_FMT_24BITS; break;
 231         default :
 232                 snd_BUG();
 233                 return -EINVAL;
 234         };
 235
 236         return vx_set_stream_format(chip, pipe, header);
 237 }
 238
 239 /*
 240  * set / query the IBL size
 241  */
 242 static int vx_set_ibl(vx_core_t *chip, struct vx_ibl_info *info)
 243 {
 244         int err;
 245         struct vx_rmh rmh;
 246
 247         vx_init_rmh(&rmh, CMD_IBL);
 248         rmh.Cmd[0] |= info->size & 0x03ffff;
 249         err = vx_send_msg(chip, &rmh);
 250         if (err < 0)
 251                 return err;
 252         info->size = rmh.Stat[0];
 253         info->max_size = rmh.Stat[1];
 254         info->min_size = rmh.Stat[2];
 255         info->granularity = rmh.Stat[3];
 256         snd_printdd(KERN_DEBUG "vx_set_ibl: size = %d, max = %d, min = %d, gran = %d\n",
 257                    info->size, info->max_size, info->min_size, info->granularity);
 258         return 0;
 259 }
 260
 261
 262 /*
 263  * vx_get_pipe_state - get the state of a pipe
 264  * @pipe: the pipe to be checked
 265  * @state: the pointer for the returned state
 266  *
 267  * checks the state of a given pipe, and stores the state (1 = running,
 268  * 0 = paused) on the given pointer.
 269  *
 270  * called from trigger callback only
 271  */
 272 static int vx_get_pipe_state(vx_core_t *chip, vx_pipe_t *pipe, int *state)
 273 {
 274         int err;
 275         struct vx_rmh rmh;
 276
 277         vx_init_rmh(&rmh, CMD_PIPE_STATE);
 278         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 279         err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 280         if (! err)
 281                 *state = (rmh.Stat[0] & (1 << pipe->number)) ? 1 : 0;
 282         return err;
 283 }
 284
 285
 286 /*
 287  * vx_query_hbuffer_size - query available h-buffer size in bytes
 288  * @pipe: the pipe to be checked
 289  *
 290  * return the available size on h-buffer in bytes,
 291  * or a negative error code.
 292  *
 293  * NOTE: calling this function always switches to the stream mode.
 294  *       you'll need to disconnect the host to get back to the
 295  *       normal mode.
 296  */
 297 static int vx_query_hbuffer_size(vx_core_t *chip, vx_pipe_t *pipe)
 298 {
 299         int result;
 300         struct vx_rmh rmh;
 301
 302         vx_init_rmh(&rmh, CMD_SIZE_HBUFFER);
 303         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 304         if (pipe->is_capture)
 305                 rmh.Cmd[0] |= 0x00000001;
 306         result = vx_send_msg(chip, &rmh);
 307         if (! result)
 308                 result = rmh.Stat[0] & 0xffff;
 309         return result;
 310 }
 311
 312
 313 /*
 314  * vx_pipe_can_start - query whether a pipe is ready for start
 315  * @pipe: the pipe to be checked
 316  *
 317  * return 1 if ready, 0 if not ready, and negative value on error.
 318  *
 319  * called from trigger callback only
 320  */
 321 static int vx_pipe_can_start(vx_core_t *chip, vx_pipe_t *pipe)
 322 {
 323         int err;
 324         struct vx_rmh rmh;
 325
 326         vx_init_rmh(&rmh, CMD_CAN_START_PIPE);
 327         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 328         rmh.Cmd[0] |= 1;
 329
 330         err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 331         if (! err) {
 332                 if (rmh.Stat[0])
 333                         err = 1;
 334         }
 335         return err;
 336 }
 337
 338 /*
 339  * vx_conf_pipe - tell the pipe to stand by and wait for IRQA.
 340  * @pipe: the pipe to be configured
 341  */
 342 static int vx_conf_pipe(vx_core_t *chip, vx_pipe_t *pipe)
 343 {
 344         struct vx_rmh rmh;
 345
 346         vx_init_rmh(&rmh, CMD_CONF_PIPE);
 347         if (pipe->is_capture)
 348                 rmh.Cmd[0] |= COMMAND_RECORD_MASK;
 349         rmh.Cmd[1] = 1 << pipe->number;
 350         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 351 }
 352
 353 /*
 354  * vx_send_irqa - trigger IRQA
 355  */
 356 static int vx_send_irqa(vx_core_t *chip)
 357 {
 358         struct vx_rmh rmh;
 359
 360         vx_init_rmh(&rmh, CMD_SEND_IRQA);
 361         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 362 }
 363
 364
 365 #define MAX_WAIT_FOR_DSP        250
 366 /*
 367  * vx boards do not support inter-card sync, besides
 368  * only 126 samples require to be prepared before a pipe can start
 369  */
 370 #define CAN_START_DELAY         2       /* wait 2ms only before asking if the pipe is ready*/
 371 #define WAIT_STATE_DELAY        2       /* wait 2ms after irqA was requested and check if the pipe state toggled*/
 372
 373 /*
 374  * vx_toggle_pipe - start / pause a pipe
 375  * @pipe: the pipe to be triggered
 376  * @state: start = 1, pause = 0
 377  *
 378  * called from trigger callback only
 379  *
 380  */
 381 static int vx_toggle_pipe(vx_core_t *chip, vx_pipe_t *pipe, int state)
 382 {
 383         int err, i, cur_state;
 384
 385         /* Check the pipe is not already in the requested state */
 386         if (vx_get_pipe_state(chip, pipe, &cur_state) < 0)
 387                 return -EBADFD;
 388         if (state == cur_state)
 389                 return 0;
 390
 391         /* If a start is requested, ask the DSP to get prepared
 392          * and wait for a positive acknowledge (when there are
 393          * enough sound buffer for this pipe)
 394          */
 395         if (state) {
 396                 for (i = 0 ; i < MAX_WAIT_FOR_DSP; i++) {
 397                         err = vx_pipe_can_start(chip, pipe);
 398                         if (err > 0)
 399                                 break;
 400                         /* Wait for a few, before asking again
 401                          * to avoid flooding the DSP with our requests
 402                          */
 403                         mdelay(1);
 404                 }
 405         }
 406
 407         if ((err = vx_conf_pipe(chip, pipe)) < 0)
 408                 return err;
 409
 410         if ((err = vx_send_irqa(chip)) < 0)
 411                 return err;
 412
 413         /* If it completes successfully, wait for the pipes
 414          * reaching the expected state before returning
 415          * Check one pipe only (since they are synchronous)
 416          */
 417         for (i = 0; i < MAX_WAIT_FOR_DSP; i++) {
 418                 err = vx_get_pipe_state(chip, pipe, &cur_state);
 419                 if (err < 0 || cur_state == state)
 420                         break;
 421                 err = -EIO;
 422                 mdelay(1);
 423         }
 424         return err < 0 ? -EIO : 0;
 425 }
 426
 427
 428 /*
 429  * vx_stop_pipe - stop a pipe
 430  * @pipe: the pipe to be stopped
 431  *
 432  * called from trigger callback only
 433  */
 434 static int vx_stop_pipe(vx_core_t *chip, vx_pipe_t *pipe)
 435 {
 436         struct vx_rmh rmh;
 437         vx_init_rmh(&rmh, CMD_STOP_PIPE);
 438         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 439         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 440 }
 441
 442
 443 /*
 444  * vx_alloc_pipe - allocate a pipe and initialize the pipe instance
 445  * @capture: 0 = playback, 1 = capture operation
 446  * @audioid: the audio id to be assigned
 447  * @num_audio: number of audio channels
 448  * @pipep: the returned pipe instance
 449  *
 450  * return 0 on success, or a negative error code.
 451  */
 452 static int vx_alloc_pipe(vx_core_t *chip, int capture,
 453                          int audioid, int num_audio,
 454                          vx_pipe_t **pipep)
 455 {
 456         int err;
 457         vx_pipe_t *pipe;
 458         struct vx_rmh rmh;
 459         int data_mode;
 460
 461         *pipep = NULL;
 462         vx_init_rmh(&rmh, CMD_RES_PIPE);
 463         vx_set_pipe_cmd_params(&rmh, capture, audioid, num_audio);
 464 #if 0   // NYI
 465         if (underrun_skip_sound)
 466                 rmh.Cmd[0] |= BIT_SKIP_SOUND;
 467 #endif  // NYI
 468         data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
 469         if (! capture && data_mode)
 470                 rmh.Cmd[0] |= BIT_DATA_MODE;
 471         err = vx_send_msg(chip, &rmh);
 472         if (err < 0)
 473                 return err;
 474
 475         /* initialize the pipe record */
 476         pipe = kcalloc(1, sizeof(*pipe), GFP_KERNEL);
 477         if (! pipe) {
 478                 /* release the pipe */
 479                 vx_init_rmh(&rmh, CMD_FREE_PIPE);
 480                 vx_set_pipe_cmd_params(&rmh, capture, audioid, 0);
 481                 vx_send_msg(chip, &rmh);
 482                 return -ENOMEM;
 483         }
 484
 485         /* the pipe index should be identical with the audio index */
 486         pipe->number = audioid;
 487         pipe->is_capture = capture;
 488         pipe->channels = num_audio;
 489         pipe->differed_type = 0;
 490         pipe->pcx_time = 0;
 491         pipe->data_mode = data_mode;
 492         *pipep = pipe;
 493
 494         return 0;
 495 }
 496
 497
 498 /*
 499  * vx_free_pipe - release a pipe
 500  * @pipe: pipe to be released
 501  */
 502 static int vx_free_pipe(vx_core_t *chip, vx_pipe_t *pipe)
 503 {
 504         struct vx_rmh rmh;
 505
 506         vx_init_rmh(&rmh, CMD_FREE_PIPE);
 507         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 508         vx_send_msg(chip, &rmh);
 509
 510         kfree(pipe);
 511         return 0;
 512 }
 513
 514
 515 /*
 516  * vx_start_stream - start the stream
 517  *
 518  * called from trigger callback only
 519  */
 520 static int vx_start_stream(vx_core_t *chip, vx_pipe_t *pipe)
 521 {
 522         struct vx_rmh rmh;
 523
 524         vx_init_rmh(&rmh, CMD_START_ONE_STREAM);
 525         vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
 526         vx_set_differed_time(chip, &rmh, pipe);
 527         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 528 }
 529
 530
 531 /*
 532  * vx_stop_stream - stop the stream
 533  *
 534  * called from trigger callback only
 535  */
 536 static int vx_stop_stream(vx_core_t *chip, vx_pipe_t *pipe)
 537 {
 538         struct vx_rmh rmh;
 539
 540         vx_init_rmh(&rmh, CMD_STOP_STREAM);
 541         vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
 542         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
 543 }
 544
 545
 546 /*
 547  * playback hw information
 548  */
 549
 550 static snd_pcm_hardware_t vx_pcm_playback_hw = {
 551         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 552                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID |
 553                                  SNDRV_PCM_INFO_RESUME),
 554         .formats =              /*SNDRV_PCM_FMTBIT_U8 |*/ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
 555         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 556         .rate_min =             5000,
 557         .rate_max =             48000,
 558         .channels_min =         1,
 559         .channels_max =         2,
 560         .buffer_bytes_max =     (128*1024),
 561         .period_bytes_min =     126,
 562         .period_bytes_max =     (128*1024),
 563         .periods_min =          2,
 564         .periods_max =          VX_MAX_PERIODS,
 565         .fifo_size =            126,
 566 };
 567
 568
 569 static void vx_pcm_delayed_start(unsigned long arg);
 570
 571 /*
 572  * vx_pcm_playback_open - open callback for playback
 573  */
 574 static int vx_pcm_playback_open(snd_pcm_substream_t *subs)
 575 {
 576         snd_pcm_runtime_t *runtime = subs->runtime;
 577         vx_core_t *chip = snd_pcm_substream_chip(subs);
 578         vx_pipe_t *pipe = NULL;
 579         unsigned int audio;
 580         int err;
 581
 582         if (chip->chip_status & VX_STAT_IS_STALE)
 583                 return -EBUSY;
 584
 585         audio = subs->pcm->device * 2;
 586         snd_assert(audio < chip->audio_outs, return -EINVAL);
 587
 588         /* playback pipe may have been already allocated for monitoring */
 589         pipe = chip->playback_pipes[audio];
 590         if (! pipe) {
 591                 /* not allocated yet */
 592                 err = vx_alloc_pipe(chip, 0, audio, 2, &pipe); /* stereo playback */
 593                 if (err < 0)
 594                         return err;
 595                 chip->playback_pipes[audio] = pipe;
 596         }
 597         /* open for playback */
 598         pipe->references++;
 599
 600         pipe->substream = subs;
 601         tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
 602         chip->playback_pipes[audio] = pipe;
 603
 604         runtime->hw = vx_pcm_playback_hw;
 605         runtime->hw.period_bytes_min = chip->ibl.size;
 606         runtime->private_data = pipe;
 607
 608         /* align to 4 bytes (otherwise will be problematic when 24bit is used) */
 609         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
 610         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
 611
 612         return 0;
 613 }
 614
 615 /*
 616  * vx_pcm_playback_close - close callback for playback
 617  */
 618 static int vx_pcm_playback_close(snd_pcm_substream_t *subs)
 619 {
 620         vx_core_t *chip = snd_pcm_substream_chip(subs);
 621         vx_pipe_t *pipe;
 622
 623         if (! subs->runtime->private_data)
 624                 return -EINVAL;
 625
 626         pipe = subs->runtime->private_data;
 627
 628         if (--pipe->references == 0) {
 629                 chip->playback_pipes[pipe->number] = NULL;
 630                 vx_free_pipe(chip, pipe);
 631         }
 632
 633         return 0;
 634
 635 }
 636
 637
 638 /*
 639  * vx_notify_end_of_buffer - send "end-of-buffer" notifier at the given pipe
 640  * @pipe: the pipe to notify
 641  *
 642  * NB: call with a certain lock.
 643  */
 644 static int vx_notify_end_of_buffer(vx_core_t *chip, vx_pipe_t *pipe)
 645 {
 646         int err;
 647         struct vx_rmh rmh;  /* use a temporary rmh here */
 648
 649         /* Toggle Dsp Host Interface into Message mode */
 650         vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
 651         vx_init_rmh(&rmh, CMD_NOTIFY_END_OF_BUFFER);
 652         vx_set_stream_cmd_params(&rmh, 0, pipe->number);
 653         err = vx_send_msg_nolock(chip, &rmh);
 654         if (err < 0)
 655                 return err;
 656         /* Toggle Dsp Host Interface back to sound transfer mode */
 657         vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
 658         return 0;
 659 }
 660
 661 /*
 662  * vx_pcm_playback_transfer_chunk - transfer a single chunk
 663  * @subs: substream
 664  * @pipe: the pipe to transfer
 665  * @size: chunk size in bytes
 666  *
 667  * transfer a single buffer chunk.  EOB notificaton is added after that.
 668  * called from the interrupt handler, too.
 669  *
 670  * return 0 if ok.
 671  */
 672 static int vx_pcm_playback_transfer_chunk(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe, int size)
 673 {
 674         int space, err = 0;
 675
 676         space = vx_query_hbuffer_size(chip, pipe);
 677         if (space < 0) {
 678                 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
 679                 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
 680                 snd_printd("error hbuffer\n");
 681                 return space;
 682         }
 683         if (space < size) {
 684                 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
 685                 snd_printd("no enough hbuffer space %d\n", space);
 686                 return -EIO; /* XRUN */
 687         }
 688
 689         /* we don't need irqsave here, because this function
 690          * is called from either trigger callback or irq handler
 691          */
 692         spin_lock(&chip->lock);
 693         vx_pseudo_dma_write(chip, runtime, pipe, size);
 694         err = vx_notify_end_of_buffer(chip, pipe);
 695         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
 696         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
 697         spin_unlock(&chip->lock);
 698         return err;
 699 }
 700
 701 /*
 702  * update the position of the given pipe.
 703  * pipe->position is updated and wrapped within the buffer size.
 704  * pipe->transferred is updated, too, but the size is not wrapped,
 705  * so that the caller can check the total transferred size later
 706  * (to call snd_pcm_period_elapsed).
 707  */
 708 static int vx_update_pipe_position(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe)
 709 {
 710         struct vx_rmh rmh;
 711         int err, update;
 712         u64 count;
 713
 714         vx_init_rmh(&rmh, CMD_STREAM_SAMPLE_COUNT);
 715         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
 716         err = vx_send_msg(chip, &rmh);
 717         if (err < 0)
 718                 return err;
 719
 720         count = ((u64)(rmh.Stat[0] & 0xfffff) << 24) | (u64)rmh.Stat[1];
 721         update = (int)(count - pipe->cur_count);
 722         pipe->cur_count = count;
 723         pipe->position += update;
 724         if (pipe->position >= (int)runtime->buffer_size)
 725                 pipe->position %= runtime->buffer_size;
 726         pipe->transferred += update;
 727         return 0;
 728 }
 729
 730 /*
 731  * transfer the pending playback buffer data to DSP
 732  * called from interrupt handler
 733  */
 734 static void vx_pcm_playback_transfer(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe, int nchunks)
 735 {
 736         int i, err;
 737         snd_pcm_runtime_t *runtime = subs->runtime;
 738
 739         if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
 740                 return;
 741         for (i = 0; i < nchunks; i++) {
 742                 if ((err = vx_pcm_playback_transfer_chunk(chip, runtime, pipe,
 743                                                           chip->ibl.size)) < 0)
 744                         return;
 745         }
 746 }
 747
 748 /*
 749  * update the playback position and call snd_pcm_period_elapsed() if necessary
 750  * called from interrupt handler
 751  */
 752 static void vx_pcm_playback_update(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe)
 753 {
 754         int err;
 755         snd_pcm_runtime_t *runtime = subs->runtime;
 756
 757         if (pipe->running && ! (chip->chip_status & VX_STAT_IS_STALE)) {
 758                 if ((err = vx_update_pipe_position(chip, runtime, pipe)) < 0)
 759                         return;
 760                 if (pipe->transferred >= (int)runtime->period_size) {
 761                         pipe->transferred %= runtime->period_size;
 762                         snd_pcm_period_elapsed(subs);
 763                 }
 764         }
 765 }
 766
 767 /*
 768  * start the stream and pipe.
 769  * this function is called from tasklet, which is invoked by the trigger
 770  * START callback.
 771  */
 772 static void vx_pcm_delayed_start(unsigned long arg)
 773 {
 774         snd_pcm_substream_t *subs = (snd_pcm_substream_t *)arg;
 775         vx_core_t *chip = subs->pcm->private_data;
 776         vx_pipe_t *pipe = subs->runtime->private_data;
 777         int err;
 778
 779         /*  printk( KERN_DEBUG "DDDD tasklet delayed start jiffies = %ld\n", jiffies);*/
 780
 781         if ((err = vx_start_stream(chip, pipe)) < 0) {
 782                 snd_printk(KERN_ERR "vx: cannot start stream\n");
 783                 return;
 784         }
 785         if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0) {
 786                 snd_printk(KERN_ERR "vx: cannot start pipe\n");
 787                 return;
 788         }
 789         /*   printk( KERN_DEBUG "dddd tasklet delayed start jiffies = %ld \n", jiffies);*/
 790 }
 791
 792 /*
 793  * vx_pcm_playback_trigger - trigger callback for playback
 794  */
 795 static int vx_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
 796 {
 797         vx_core_t *chip = snd_pcm_substream_chip(subs);
 798         vx_pipe_t *pipe = subs->runtime->private_data;
 799         int err;
 800
 801         if (chip->chip_status & VX_STAT_IS_STALE)
 802                 return -EBUSY;
 803
 804         switch (cmd) {
 805         case SNDRV_PCM_TRIGGER_START:
 806         case SNDRV_PCM_TRIGGER_RESUME:
 807                 if (! pipe->is_capture)
 808                         vx_pcm_playback_transfer(chip, subs, pipe, 2);
 809                 /* FIXME:
 810                  * we trigger the pipe using tasklet, so that the interrupts are
 811                  * issued surely after the trigger is completed.
 812                  */
 813                 tasklet_hi_schedule(&pipe->start_tq);
 814                 chip->pcm_running++;
 815                 pipe->running = 1;
 816                 break;
 817         case SNDRV_PCM_TRIGGER_STOP:
 818         case SNDRV_PCM_TRIGGER_SUSPEND:
 819                 vx_toggle_pipe(chip, pipe, 0);
 820                 vx_stop_pipe(chip, pipe);
 821                 vx_stop_stream(chip, pipe);
 822                 chip->pcm_running--;
 823                 pipe->running = 0;
 824                 break;
 825         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 826                 if ((err = vx_toggle_pipe(chip, pipe, 0)) < 0)
 827                         return err;
 828                 break;
 829         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 830                 if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0)
 831                         return err;
 832                 break;
 833         default:
 834                 return -EINVAL;
 835         }
 836         return 0;
 837 }
 838
 839 /*
 840  * vx_pcm_playback_pointer - pointer callback for playback
 841  */
 842 static snd_pcm_uframes_t vx_pcm_playback_pointer(snd_pcm_substream_t *subs)
 843 {
 844         snd_pcm_runtime_t *runtime = subs->runtime;
 845         vx_pipe_t *pipe = runtime->private_data;
 846         return pipe->position;
 847 }
 848
 849 /*
 850  * vx_pcm_hw_params - hw_params callback for playback and capture
 851  */
 852 static int vx_pcm_hw_params(snd_pcm_substream_t *subs,
 853                                      snd_pcm_hw_params_t *hw_params)
 854 {
 855         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
 856 }
 857
 858 /*
 859  * vx_pcm_hw_free - hw_free callback for playback and capture
 860  */
 861 static int vx_pcm_hw_free(snd_pcm_substream_t *subs)
 862 {
 863         return snd_pcm_free_vmalloc_buffer(subs);
 864 }
 865
 866 /*
 867  * vx_pcm_prepare - prepare callback for playback and capture
 868  */
 869 static int vx_pcm_prepare(snd_pcm_substream_t *subs)
 870 {
 871         vx_core_t *chip = snd_pcm_substream_chip(subs);
 872         snd_pcm_runtime_t *runtime = subs->runtime;
 873         vx_pipe_t *pipe = runtime->private_data;
 874         int err, data_mode;
 875         // int max_size, nchunks;
 876
 877         if (chip->chip_status & VX_STAT_IS_STALE)
 878                 return -EBUSY;
 879
 880         data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
 881         if (data_mode != pipe->data_mode && ! pipe->is_capture) {
 882                 /* IEC958 status (raw-mode) was changed */
 883                 /* we reopen the pipe */
 884                 struct vx_rmh rmh;
 885                 snd_printdd(KERN_DEBUG "reopen the pipe with data_mode = %d\n", data_mode);
 886                 vx_init_rmh(&rmh, CMD_FREE_PIPE);
 887                 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, 0);
 888                 if ((err = vx_send_msg(chip, &rmh)) < 0)
 889                         return err;
 890                 vx_init_rmh(&rmh, CMD_RES_PIPE);
 891                 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, pipe->channels);
 892                 if (data_mode)
 893                         rmh.Cmd[0] |= BIT_DATA_MODE;
 894                 if ((err = vx_send_msg(chip, &rmh)) < 0)
 895                         return err;
 896                 pipe->data_mode = data_mode;
 897         }
 898
 899         if (chip->pcm_running && chip->freq != runtime->rate) {
 900                 snd_printk(KERN_ERR "vx: cannot set different clock %d from the current %d\n", runtime->rate, chip->freq);
 901                 return -EINVAL;
 902         }
 903         vx_set_clock(chip, runtime->rate);
 904
 905         if ((err = vx_set_format(chip, pipe, runtime)) < 0)
 906                 return err;
 907
 908         if (vx_is_pcmcia(chip)) {
 909                 pipe->align = 2; /* 16bit word */
 910         } else {
 911                 pipe->align = 4; /* 32bit word */
 912         }
 913
 914         pipe->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
 915         pipe->period_bytes = frames_to_bytes(runtime, runtime->period_size);
 916         pipe->hw_ptr = 0;
 917
 918         /* set the timestamp */
 919         vx_update_pipe_position(chip, runtime, pipe);
 920         /* clear again */
 921         pipe->transferred = 0;
 922         pipe->position = 0;
 923
 924         pipe->prepared = 1;
 925
 926         return 0;
 927 }
 928
 929
 930 /*
 931  * operators for PCM playback
 932  */
 933 static snd_pcm_ops_t vx_pcm_playback_ops = {
 934         .open =         vx_pcm_playback_open,
 935         .close =        vx_pcm_playback_close,
 936         .ioctl =        snd_pcm_lib_ioctl,
 937         .hw_params =    vx_pcm_hw_params,
 938         .hw_free =      vx_pcm_hw_free,
 939         .prepare =      vx_pcm_prepare,
 940         .trigger =      vx_pcm_trigger,
 941         .pointer =      vx_pcm_playback_pointer,
 942         .page =         snd_pcm_get_vmalloc_page,
 943 };
 944
 945
 946 /*
 947  * playback hw information
 948  */
 949
 950 static snd_pcm_hardware_t vx_pcm_capture_hw = {
 951         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 952                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID |
 953                                  SNDRV_PCM_INFO_RESUME),
 954         .formats =              /*SNDRV_PCM_FMTBIT_U8 |*/ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
 955         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 956         .rate_min =             5000,
 957         .rate_max =             48000,
 958         .channels_min =         1,
 959         .channels_max =         2,
 960         .buffer_bytes_max =     (128*1024),
 961         .period_bytes_min =     126,
 962         .period_bytes_max =     (128*1024),
 963         .periods_min =          2,
 964         .periods_max =          VX_MAX_PERIODS,
 965         .fifo_size =            126,
 966 };
 967
 968
 969 /*
 970  * vx_pcm_capture_open - open callback for capture
 971  */
 972 static int vx_pcm_capture_open(snd_pcm_substream_t *subs)
 973 {
 974         snd_pcm_runtime_t *runtime = subs->runtime;
 975         vx_core_t *chip = snd_pcm_substream_chip(subs);
 976         vx_pipe_t *pipe;
 977         vx_pipe_t *pipe_out_monitoring = NULL;
 978         unsigned int audio;
 979         int err;
 980
 981         if (chip->chip_status & VX_STAT_IS_STALE)
 982                 return -EBUSY;
 983
 984         audio = subs->pcm->device * 2;
 985         snd_assert(audio < chip->audio_ins, return -EINVAL);
 986         err = vx_alloc_pipe(chip, 1, audio, 2, &pipe);
 987         if (err < 0)
 988                 return err;
 989         pipe->substream = subs;
 990         tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
 991         chip->capture_pipes[audio] = pipe;
 992
 993         /* check if monitoring is needed */
 994         if (chip->audio_monitor_active[audio]) {
 995                 pipe_out_monitoring = chip->playback_pipes[audio];
 996                 if (! pipe_out_monitoring) {
 997                         /* allocate a pipe */
 998                         err = vx_alloc_pipe(chip, 0, audio, 2, &pipe_out_monitoring);
 999                         if (err < 0)
1000                                 return err;
1001                         chip->playback_pipes[audio] = pipe_out_monitoring;
1002                 }
1003                 pipe_out_monitoring->references++;
1004                 /*
1005                    if an output pipe is available, it's audios still may need to be
1006                    unmuted. hence we'll have to call a mixer entry point.
1007                 */
1008                 vx_set_monitor_level(chip, audio, chip->audio_monitor[audio], chip->audio_monitor_active[audio]);
1009                 /* assuming stereo */
1010                 vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1], chip->audio_monitor_active[audio+1]);
1011         }
1012
1013         pipe->monitoring_pipe = pipe_out_monitoring; /* default value NULL */
1014
1015         runtime->hw = vx_pcm_capture_hw;
1016         runtime->hw.period_bytes_min = chip->ibl.size;
1017         runtime->private_data = pipe;
1018
1019         /* align to 4 bytes (otherwise will be problematic when 24bit is used) */
1020         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
1021         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
1022
1023         return 0;
1024 }
1025
1026 /*
1027  * vx_pcm_capture_close - close callback for capture
1028  */
1029 static int vx_pcm_capture_close(snd_pcm_substream_t *subs)
1030 {
1031         vx_core_t *chip = snd_pcm_substream_chip(subs);
1032         vx_pipe_t *pipe;
1033         vx_pipe_t *pipe_out_monitoring;
1034
1035         if (! subs->runtime->private_data)
1036                 return -EINVAL;
1037         pipe = subs->runtime->private_data;
1038         chip->capture_pipes[pipe->number] = NULL;
1039
1040         pipe_out_monitoring = pipe->monitoring_pipe;
1041
1042         /*
1043           if an output pipe is attached to this input,
1044           check if it needs to be released.
1045         */
1046         if (pipe_out_monitoring) {
1047                 if (--pipe_out_monitoring->references == 0) {
1048                         vx_free_pipe(chip, pipe_out_monitoring);
1049                         chip->playback_pipes[pipe->number] = NULL;
1050                         pipe->monitoring_pipe = NULL;
1051                 }
1052         }
1053
1054         vx_free_pipe(chip, pipe);
1055         return 0;
1056 }
1057
1058
1059
1060 #define DMA_READ_ALIGN  6       /* hardware alignment for read */
1061
1062 /*
1063  * vx_pcm_capture_update - update the capture buffer
1064  */
1065 static void vx_pcm_capture_update(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe)
1066 {
1067         int size, space, count;
1068         snd_pcm_runtime_t *runtime = subs->runtime;
1069
1070         if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
1071                 return;
1072
1073         size = runtime->buffer_size - snd_pcm_capture_avail(runtime);
1074         if (! size)
1075                 return;
1076         size = frames_to_bytes(runtime, size);
1077         space = vx_query_hbuffer_size(chip, pipe);
1078         if (space < 0)
1079                 goto _error;
1080         if (size > space)
1081                 size = space;
1082         size = (size / 3) * 3; /* align to 3 bytes */
1083         if (size < DMA_READ_ALIGN)
1084                 goto _error;
1085
1086         /* keep the last 6 bytes, they will be read after disconnection */
1087         count = size - DMA_READ_ALIGN;
1088         /* read bytes until the current pointer reaches to the aligned position
1089          * for word-transfer
1090          */
1091         while (count > 0) {
1092                 if ((pipe->hw_ptr % pipe->align) == 0)
1093                         break;
1094                 if (vx_wait_for_rx_full(chip) < 0)
1095                         goto _error;
1096                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1097                 count -= 3;
1098         }
1099         if (count > 0) {
1100                 /* ok, let's accelerate! */
1101                 int align = pipe->align * 3;
1102                 space = (count / align) * align;
1103                 vx_pseudo_dma_read(chip, runtime, pipe, space);
1104                 count -= space;
1105         }
1106         /* read the rest of bytes */
1107         while (count > 0) {
1108                 if (vx_wait_for_rx_full(chip) < 0)
1109                         goto _error;
1110                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1111                 count -= 3;
1112         }
1113         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1114         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
1115         /* read the last pending 6 bytes */
1116         count = DMA_READ_ALIGN;
1117         while (count > 0) {
1118                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1119                 count -= 3;
1120         }
1121         /* update the position */
1122         pipe->transferred += size;
1123         if (pipe->transferred >= pipe->period_bytes) {
1124                 pipe->transferred %= pipe->period_bytes;
1125                 snd_pcm_period_elapsed(subs);
1126         }
1127         return;
1128
1129  _error:
1130         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1131         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
1132         return;
1133 }
1134
1135 /*
1136  * vx_pcm_capture_pointer - pointer callback for capture
1137  */
1138 static snd_pcm_uframes_t vx_pcm_capture_pointer(snd_pcm_substream_t *subs)
1139 {
1140         snd_pcm_runtime_t *runtime = subs->runtime;
1141         vx_pipe_t *pipe = runtime->private_data;
1142         return bytes_to_frames(runtime, pipe->hw_ptr);
1143 }
1144
1145 /*
1146  * operators for PCM capture
1147  */
1148 static snd_pcm_ops_t vx_pcm_capture_ops = {
1149         .open =         vx_pcm_capture_open,
1150         .close =        vx_pcm_capture_close,
1151         .ioctl =        snd_pcm_lib_ioctl,
1152         .hw_params =    vx_pcm_hw_params,
1153         .hw_free =      vx_pcm_hw_free,
1154         .prepare =      vx_pcm_prepare,
1155         .trigger =      vx_pcm_trigger,
1156         .pointer =      vx_pcm_capture_pointer,
1157         .page =         snd_pcm_get_vmalloc_page,
1158 };
1159
1160
1161 /*
1162  * interrupt handler for pcm streams
1163  */
1164 void vx_pcm_update_intr(vx_core_t *chip, unsigned int events)
1165 {
1166         unsigned int i;
1167         vx_pipe_t *pipe;
1168
1169 #define EVENT_MASK      (END_OF_BUFFER_EVENTS_PENDING|ASYNC_EVENTS_PENDING)
1170
1171         if (events & EVENT_MASK) {
1172                 vx_init_rmh(&chip->irq_rmh, CMD_ASYNC);
1173                 if (events & ASYNC_EVENTS_PENDING)
1174                         chip->irq_rmh.Cmd[0] |= 0x00000001;     /* SEL_ASYNC_EVENTS */
1175                 if (events & END_OF_BUFFER_EVENTS_PENDING)
1176                         chip->irq_rmh.Cmd[0] |= 0x00000002;     /* SEL_END_OF_BUF_EVENTS */
1177
1178                 if (vx_send_msg(chip, &chip->irq_rmh) < 0) {
1179                         snd_printdd(KERN_ERR "msg send error!!\n");
1180                         return;
1181                 }
1182
1183                 i = 1;
1184                 while (i < chip->irq_rmh.LgStat) {
1185                         int p, buf, capture, eob;
1186                         p = chip->irq_rmh.Stat[i] & MASK_FIRST_FIELD;
1187                         capture = (chip->irq_rmh.Stat[i] & 0x400000) ? 1 : 0;
1188                         eob = (chip->irq_rmh.Stat[i] & 0x800000) ? 1 : 0;
1189                         i++;
1190                         if (events & ASYNC_EVENTS_PENDING)
1191                                 i++;
1192                         buf = 1; /* force to transfer */
1193                         if (events & END_OF_BUFFER_EVENTS_PENDING) {
1194                                 if (eob)
1195                                         buf = chip->irq_rmh.Stat[i];
1196                                 i++;
1197                         }
1198                         if (capture)
1199                                 continue;
1200                         snd_assert(p >= 0 && (unsigned int)p < chip->audio_outs,);
1201                         pipe = chip->playback_pipes[p];
1202                         if (pipe && pipe->substream) {
1203                                 vx_pcm_playback_update(chip, pipe->substream, pipe);
1204                                 vx_pcm_playback_transfer(chip, pipe->substream, pipe, buf);
1205                         }
1206                 }
1207         }
1208
1209         /* update the capture pcm pointers as frequently as possible */
1210         for (i = 0; i < chip->audio_ins; i++) {
1211                 pipe = chip->capture_pipes[i];
1212                 if (pipe && pipe->substream)
1213                         vx_pcm_capture_update(chip, pipe->substream, pipe);
1214         }
1215 }
1216
1217
1218 /*
1219  * vx_init_audio_io - check the availabe audio i/o and allocate pipe arrays
1220  */
1221 static int vx_init_audio_io(vx_core_t *chip)
1222 {
1223         struct vx_rmh rmh;
1224         int preferred;
1225
1226         vx_init_rmh(&rmh, CMD_SUPPORTED);
1227         if (vx_send_msg(chip, &rmh) < 0) {
1228                 snd_printk(KERN_ERR "vx: cannot get the supported audio data\n");
1229                 return -ENXIO;
1230         }
1231
1232         chip->audio_outs = rmh.Stat[0] & MASK_FIRST_FIELD;
1233         chip->audio_ins = (rmh.Stat[0] >> (FIELD_SIZE*2)) & MASK_FIRST_FIELD;
1234         chip->audio_info = rmh.Stat[1];
1235
1236         /* allocate pipes */
1237         chip->playback_pipes = kmalloc(sizeof(vx_pipe_t *) * chip->audio_outs, GFP_KERNEL);
1238         chip->capture_pipes = kmalloc(sizeof(vx_pipe_t *) * chip->audio_ins, GFP_KERNEL);
1239         if (! chip->playback_pipes || ! chip->capture_pipes)
1240                 return -ENOMEM;
1241
1242         memset(chip->playback_pipes, 0, sizeof(vx_pipe_t *) * chip->audio_outs);
1243         memset(chip->capture_pipes, 0, sizeof(vx_pipe_t *) * chip->audio_ins);
1244
1245         preferred = chip->ibl.size;
1246         chip->ibl.size = 0;
1247         vx_set_ibl(chip, &chip->ibl); /* query the info */
1248         if (preferred > 0) {
1249                 chip->ibl.size = ((preferred + chip->ibl.granularity - 1) / chip->ibl.granularity) * chip->ibl.granularity;
1250                 if (chip->ibl.size > chip->ibl.max_size)
1251                         chip->ibl.size = chip->ibl.max_size;
1252         } else
1253                 chip->ibl.size = chip->ibl.min_size; /* set to the minimum */
1254         vx_set_ibl(chip, &chip->ibl);
1255
1256         return 0;
1257 }
1258
1259
1260 /*
1261  * free callback for pcm
1262  */
1263 static void snd_vx_pcm_free(snd_pcm_t *pcm)
1264 {
1265         vx_core_t *chip = pcm->private_data;
1266         chip->pcm[pcm->device] = NULL;
1267         kfree(chip->playback_pipes);
1268         chip->playback_pipes = NULL;
1269         kfree(chip->capture_pipes);
1270         chip->capture_pipes = NULL;
1271 }
1272
1273 /*
1274  * snd_vx_pcm_new - create and initialize a pcm
1275  */
1276 int snd_vx_pcm_new(vx_core_t *chip)
1277 {
1278         snd_pcm_t *pcm;
1279         unsigned int i;
1280         int err;
1281
1282         if ((err = vx_init_audio_io(chip)) < 0)
1283                 return err;
1284
1285         for (i = 0; i < chip->hw->num_codecs; i++) {
1286                 unsigned int outs, ins;
1287                 outs = chip->audio_outs > i * 2 ? 1 : 0;
1288                 ins = chip->audio_ins > i * 2 ? 1 : 0;
1289                 if (! outs && ! ins)
1290                         break;
1291                 err = snd_pcm_new(chip->card, "VX PCM", i,
1292                                   outs, ins, &pcm);
1293                 if (err < 0)
1294                         return err;
1295                 if (outs)
1296                         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops);
1297                 if (ins)
1298                         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops);
1299
1300                 pcm->private_data = chip;
1301                 pcm->private_free = snd_vx_pcm_free;
1302                 pcm->info_flags = 0;
1303                 strcpy(pcm->name, chip->card->shortname);
1304                 chip->pcm[i] = pcm;
1305         }
1306
1307         return 0;
1308 }