Merge branches 'core/futexes', 'core/locking', 'core/rcu' and 'linus' into core/urgent
[linux-2.6] / 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 <linux/slab.h>
49 #include <linux/vmalloc.h>
50 #include <linux/delay.h>
51 #include <sound/core.h>
52 #include <sound/asoundef.h>
53 #include <sound/pcm.h>
54 #include <sound/vx_core.h>
55 #include "vx_cmd.h"
56
57
58 /*
59  * we use a vmalloc'ed (sg-)buffer
60  */
61
62 /* get the physical page pointer on the given offset */
63 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
64                                              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(struct snd_pcm_substream *subs, size_t size)
76 {
77         struct snd_pcm_runtime *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(runtime->dma_area);
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(struct snd_pcm_substream *subs)
98 {
99         struct snd_pcm_runtime *runtime = subs->runtime;
100
101         vfree(runtime->dma_area);
102         runtime->dma_area = NULL;
103         return 0;
104 }
105
106
107 /*
108  * read three pending pcm bytes via inb()
109  */
110 static void vx_pcm_read_per_bytes(struct vx_core *chip, struct snd_pcm_runtime *runtime,
111                                   struct vx_pipe *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(struct vx_core *chip, pcx_time_t *pc_time,
139                             unsigned int *dsp_time)
140 {
141         dsp_time[0] = (unsigned int)((*pc_time) >> 24) & PCX_TIME_HI_MASK;
142         dsp_time[1] = (unsigned int)(*pc_time) &  MASK_DSP_WORD;
143 }
144
145 /*
146  * vx_set_differed_time - set the differed time if specified
147  * @rmh: the rmh record to modify
148  * @pipe: the pipe to be checked
149  *
150  * if the pipe is programmed with the differed time, set the DSP time
151  * on the rmh and changes its command length.
152  *
153  * returns the increase of the command length.
154  */
155 static int vx_set_differed_time(struct vx_core *chip, struct vx_rmh *rmh,
156                                 struct vx_pipe *pipe)
157 {
158         /* Update The length added to the RMH command by the timestamp */
159         if (! (pipe->differed_type & DC_DIFFERED_DELAY))
160                 return 0;
161                 
162         /* Set the T bit */
163         rmh->Cmd[0] |= DSP_DIFFERED_COMMAND_MASK;
164
165         /* Time stamp is the 1st following parameter */
166         vx_set_pcx_time(chip, &pipe->pcx_time, &rmh->Cmd[1]);
167
168         /* Add the flags to a notified differed command */
169         if (pipe->differed_type & DC_NOTIFY_DELAY)
170                 rmh->Cmd[1] |= NOTIFY_MASK_TIME_HIGH ;
171
172         /* Add the flags to a multiple differed command */
173         if (pipe->differed_type & DC_MULTIPLE_DELAY)
174                 rmh->Cmd[1] |= MULTIPLE_MASK_TIME_HIGH;
175
176         /* Add the flags to a stream-time differed command */
177         if (pipe->differed_type & DC_STREAM_TIME_DELAY)
178                 rmh->Cmd[1] |= STREAM_MASK_TIME_HIGH;
179                 
180         rmh->LgCmd += 2;
181         return 2;
182 }
183
184 /*
185  * vx_set_stream_format - send the stream format command
186  * @pipe: the affected pipe
187  * @data: format bitmask
188  */
189 static int vx_set_stream_format(struct vx_core *chip, struct vx_pipe *pipe,
190                                 unsigned int data)
191 {
192         struct vx_rmh rmh;
193
194         vx_init_rmh(&rmh, pipe->is_capture ?
195                     CMD_FORMAT_STREAM_IN : CMD_FORMAT_STREAM_OUT);
196         rmh.Cmd[0] |= pipe->number << FIELD_SIZE;
197
198         /* Command might be longer since we may have to add a timestamp */
199         vx_set_differed_time(chip, &rmh, pipe);
200
201         rmh.Cmd[rmh.LgCmd] = (data & 0xFFFFFF00) >> 8;
202         rmh.Cmd[rmh.LgCmd + 1] = (data & 0xFF) << 16 /*| (datal & 0xFFFF00) >> 8*/;
203         rmh.LgCmd += 2;
204     
205         return vx_send_msg(chip, &rmh);
206 }
207
208
209 /*
210  * vx_set_format - set the format of a pipe
211  * @pipe: the affected pipe
212  * @runtime: pcm runtime instance to be referred
213  *
214  * returns 0 if successful, or a negative error code.
215  */
216 static int vx_set_format(struct vx_core *chip, struct vx_pipe *pipe,
217                          struct snd_pcm_runtime *runtime)
218 {
219         unsigned int header = HEADER_FMT_BASE;
220
221         if (runtime->channels == 1)
222                 header |= HEADER_FMT_MONO;
223         if (snd_pcm_format_little_endian(runtime->format))
224                 header |= HEADER_FMT_INTEL;
225         if (runtime->rate < 32000 && runtime->rate > 11025)
226                 header |= HEADER_FMT_UPTO32;
227         else if (runtime->rate <= 11025)
228                 header |= HEADER_FMT_UPTO11;
229
230         switch (snd_pcm_format_physical_width(runtime->format)) {
231         // case 8: break;
232         case 16: header |= HEADER_FMT_16BITS; break;
233         case 24: header |= HEADER_FMT_24BITS; break;
234         default : 
235                 snd_BUG();
236                 return -EINVAL;
237         };
238
239         return vx_set_stream_format(chip, pipe, header);
240 }
241
242 /*
243  * set / query the IBL size
244  */
245 static int vx_set_ibl(struct vx_core *chip, struct vx_ibl_info *info)
246 {
247         int err;
248         struct vx_rmh rmh;
249
250         vx_init_rmh(&rmh, CMD_IBL);
251         rmh.Cmd[0] |= info->size & 0x03ffff;
252         err = vx_send_msg(chip, &rmh);
253         if (err < 0)
254                 return err;
255         info->size = rmh.Stat[0];
256         info->max_size = rmh.Stat[1];
257         info->min_size = rmh.Stat[2];
258         info->granularity = rmh.Stat[3];
259         snd_printdd(KERN_DEBUG "vx_set_ibl: size = %d, max = %d, min = %d, gran = %d\n",
260                    info->size, info->max_size, info->min_size, info->granularity);
261         return 0;
262 }
263
264
265 /*
266  * vx_get_pipe_state - get the state of a pipe
267  * @pipe: the pipe to be checked
268  * @state: the pointer for the returned state
269  *
270  * checks the state of a given pipe, and stores the state (1 = running,
271  * 0 = paused) on the given pointer.
272  *
273  * called from trigger callback only
274  */
275 static int vx_get_pipe_state(struct vx_core *chip, struct vx_pipe *pipe, int *state)
276 {
277         int err;
278         struct vx_rmh rmh;
279
280         vx_init_rmh(&rmh, CMD_PIPE_STATE);
281         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
282         err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
283         if (! err)
284                 *state = (rmh.Stat[0] & (1 << pipe->number)) ? 1 : 0;
285         return err;
286 }
287
288
289 /*
290  * vx_query_hbuffer_size - query available h-buffer size in bytes
291  * @pipe: the pipe to be checked
292  *
293  * return the available size on h-buffer in bytes,
294  * or a negative error code.
295  *
296  * NOTE: calling this function always switches to the stream mode.
297  *       you'll need to disconnect the host to get back to the
298  *       normal mode.
299  */
300 static int vx_query_hbuffer_size(struct vx_core *chip, struct vx_pipe *pipe)
301 {
302         int result;
303         struct vx_rmh rmh;
304
305         vx_init_rmh(&rmh, CMD_SIZE_HBUFFER);
306         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
307         if (pipe->is_capture)
308                 rmh.Cmd[0] |= 0x00000001;
309         result = vx_send_msg(chip, &rmh);
310         if (! result)
311                 result = rmh.Stat[0] & 0xffff;
312         return result;
313 }
314
315
316 /*
317  * vx_pipe_can_start - query whether a pipe is ready for start
318  * @pipe: the pipe to be checked
319  *
320  * return 1 if ready, 0 if not ready, and negative value on error.
321  *
322  * called from trigger callback only
323  */
324 static int vx_pipe_can_start(struct vx_core *chip, struct vx_pipe *pipe)
325 {
326         int err;
327         struct vx_rmh rmh;
328         
329         vx_init_rmh(&rmh, CMD_CAN_START_PIPE);
330         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
331         rmh.Cmd[0] |= 1;
332
333         err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
334         if (! err) {
335                 if (rmh.Stat[0])
336                         err = 1;
337         }
338         return err;
339 }
340
341 /*
342  * vx_conf_pipe - tell the pipe to stand by and wait for IRQA.
343  * @pipe: the pipe to be configured
344  */
345 static int vx_conf_pipe(struct vx_core *chip, struct vx_pipe *pipe)
346 {
347         struct vx_rmh rmh;
348
349         vx_init_rmh(&rmh, CMD_CONF_PIPE);
350         if (pipe->is_capture)
351                 rmh.Cmd[0] |= COMMAND_RECORD_MASK;
352         rmh.Cmd[1] = 1 << pipe->number;
353         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
354 }
355
356 /*
357  * vx_send_irqa - trigger IRQA
358  */
359 static int vx_send_irqa(struct vx_core *chip)
360 {
361         struct vx_rmh rmh;
362
363         vx_init_rmh(&rmh, CMD_SEND_IRQA);
364         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
365 }
366
367
368 #define MAX_WAIT_FOR_DSP        250
369 /*
370  * vx boards do not support inter-card sync, besides
371  * only 126 samples require to be prepared before a pipe can start
372  */
373 #define CAN_START_DELAY         2       /* wait 2ms only before asking if the pipe is ready*/
374 #define WAIT_STATE_DELAY        2       /* wait 2ms after irqA was requested and check if the pipe state toggled*/
375
376 /*
377  * vx_toggle_pipe - start / pause a pipe
378  * @pipe: the pipe to be triggered
379  * @state: start = 1, pause = 0
380  *
381  * called from trigger callback only
382  *
383  */
384 static int vx_toggle_pipe(struct vx_core *chip, struct vx_pipe *pipe, int state)
385 {
386         int err, i, cur_state;
387
388         /* Check the pipe is not already in the requested state */
389         if (vx_get_pipe_state(chip, pipe, &cur_state) < 0)
390                 return -EBADFD;
391         if (state == cur_state)
392                 return 0;
393
394         /* If a start is requested, ask the DSP to get prepared
395          * and wait for a positive acknowledge (when there are
396          * enough sound buffer for this pipe)
397          */
398         if (state) {
399                 for (i = 0 ; i < MAX_WAIT_FOR_DSP; i++) {
400                         err = vx_pipe_can_start(chip, pipe);
401                         if (err > 0)
402                                 break;
403                         /* Wait for a few, before asking again
404                          * to avoid flooding the DSP with our requests
405                          */
406                         mdelay(1);
407                 }
408         }
409     
410         if ((err = vx_conf_pipe(chip, pipe)) < 0)
411                 return err;
412
413         if ((err = vx_send_irqa(chip)) < 0)
414                 return err;
415     
416         /* If it completes successfully, wait for the pipes
417          * reaching the expected state before returning
418          * Check one pipe only (since they are synchronous)
419          */
420         for (i = 0; i < MAX_WAIT_FOR_DSP; i++) {
421                 err = vx_get_pipe_state(chip, pipe, &cur_state);
422                 if (err < 0 || cur_state == state)
423                         break;
424                 err = -EIO;
425                 mdelay(1);
426         }
427         return err < 0 ? -EIO : 0;
428 }
429
430     
431 /*
432  * vx_stop_pipe - stop a pipe
433  * @pipe: the pipe to be stopped
434  *
435  * called from trigger callback only
436  */
437 static int vx_stop_pipe(struct vx_core *chip, struct vx_pipe *pipe)
438 {
439         struct vx_rmh rmh;
440         vx_init_rmh(&rmh, CMD_STOP_PIPE);
441         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
442         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
443 }
444
445
446 /*
447  * vx_alloc_pipe - allocate a pipe and initialize the pipe instance
448  * @capture: 0 = playback, 1 = capture operation
449  * @audioid: the audio id to be assigned
450  * @num_audio: number of audio channels
451  * @pipep: the returned pipe instance
452  *
453  * return 0 on success, or a negative error code.
454  */
455 static int vx_alloc_pipe(struct vx_core *chip, int capture,
456                          int audioid, int num_audio,
457                          struct vx_pipe **pipep)
458 {
459         int err;
460         struct vx_pipe *pipe;
461         struct vx_rmh rmh;
462         int data_mode;
463
464         *pipep = NULL;
465         vx_init_rmh(&rmh, CMD_RES_PIPE);
466         vx_set_pipe_cmd_params(&rmh, capture, audioid, num_audio);
467 #if 0   // NYI
468         if (underrun_skip_sound)
469                 rmh.Cmd[0] |= BIT_SKIP_SOUND;
470 #endif  // NYI
471         data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
472         if (! capture && data_mode)
473                 rmh.Cmd[0] |= BIT_DATA_MODE;
474         err = vx_send_msg(chip, &rmh);
475         if (err < 0)
476                 return err;
477
478         /* initialize the pipe record */
479         pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
480         if (! pipe) {
481                 /* release the pipe */
482                 vx_init_rmh(&rmh, CMD_FREE_PIPE);
483                 vx_set_pipe_cmd_params(&rmh, capture, audioid, 0);
484                 vx_send_msg(chip, &rmh);
485                 return -ENOMEM;
486         }
487
488         /* the pipe index should be identical with the audio index */
489         pipe->number = audioid;
490         pipe->is_capture = capture;
491         pipe->channels = num_audio;
492         pipe->differed_type = 0;
493         pipe->pcx_time = 0;
494         pipe->data_mode = data_mode;
495         *pipep = pipe;
496
497         return 0;
498 }
499
500
501 /*
502  * vx_free_pipe - release a pipe
503  * @pipe: pipe to be released
504  */
505 static int vx_free_pipe(struct vx_core *chip, struct vx_pipe *pipe)
506 {
507         struct vx_rmh rmh;
508
509         vx_init_rmh(&rmh, CMD_FREE_PIPE);
510         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
511         vx_send_msg(chip, &rmh);
512
513         kfree(pipe);
514         return 0;
515 }
516
517
518 /*
519  * vx_start_stream - start the stream
520  *
521  * called from trigger callback only
522  */
523 static int vx_start_stream(struct vx_core *chip, struct vx_pipe *pipe)
524 {
525         struct vx_rmh rmh;
526
527         vx_init_rmh(&rmh, CMD_START_ONE_STREAM);
528         vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
529         vx_set_differed_time(chip, &rmh, pipe);
530         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
531 }
532
533
534 /*
535  * vx_stop_stream - stop the stream
536  *
537  * called from trigger callback only
538  */
539 static int vx_stop_stream(struct vx_core *chip, struct vx_pipe *pipe)
540 {
541         struct vx_rmh rmh;
542
543         vx_init_rmh(&rmh, CMD_STOP_STREAM);
544         vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
545         return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ 
546 }
547
548
549 /*
550  * playback hw information
551  */
552
553 static struct snd_pcm_hardware vx_pcm_playback_hw = {
554         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
555                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
556                                  /*SNDRV_PCM_INFO_RESUME*/),
557         .formats =              (/*SNDRV_PCM_FMTBIT_U8 |*/
558                                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
559         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
560         .rate_min =             5000,
561         .rate_max =             48000,
562         .channels_min =         1,
563         .channels_max =         2,
564         .buffer_bytes_max =     (128*1024),
565         .period_bytes_min =     126,
566         .period_bytes_max =     (128*1024),
567         .periods_min =          2,
568         .periods_max =          VX_MAX_PERIODS,
569         .fifo_size =            126,
570 };
571
572
573 static void vx_pcm_delayed_start(unsigned long arg);
574
575 /*
576  * vx_pcm_playback_open - open callback for playback
577  */
578 static int vx_pcm_playback_open(struct snd_pcm_substream *subs)
579 {
580         struct snd_pcm_runtime *runtime = subs->runtime;
581         struct vx_core *chip = snd_pcm_substream_chip(subs);
582         struct vx_pipe *pipe = NULL;
583         unsigned int audio;
584         int err;
585
586         if (chip->chip_status & VX_STAT_IS_STALE)
587                 return -EBUSY;
588
589         audio = subs->pcm->device * 2;
590         if (snd_BUG_ON(audio >= chip->audio_outs))
591                 return -EINVAL;
592         
593         /* playback pipe may have been already allocated for monitoring */
594         pipe = chip->playback_pipes[audio];
595         if (! pipe) {
596                 /* not allocated yet */
597                 err = vx_alloc_pipe(chip, 0, audio, 2, &pipe); /* stereo playback */
598                 if (err < 0)
599                         return err;
600                 chip->playback_pipes[audio] = pipe;
601         }
602         /* open for playback */
603         pipe->references++;
604
605         pipe->substream = subs;
606         tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
607         chip->playback_pipes[audio] = pipe;
608
609         runtime->hw = vx_pcm_playback_hw;
610         runtime->hw.period_bytes_min = chip->ibl.size;
611         runtime->private_data = pipe;
612
613         /* align to 4 bytes (otherwise will be problematic when 24bit is used) */ 
614         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
615         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
616
617         return 0;
618 }
619
620 /*
621  * vx_pcm_playback_close - close callback for playback
622  */
623 static int vx_pcm_playback_close(struct snd_pcm_substream *subs)
624 {
625         struct vx_core *chip = snd_pcm_substream_chip(subs);
626         struct vx_pipe *pipe;
627
628         if (! subs->runtime->private_data)
629                 return -EINVAL;
630
631         pipe = subs->runtime->private_data;
632
633         if (--pipe->references == 0) {
634                 chip->playback_pipes[pipe->number] = NULL;
635                 vx_free_pipe(chip, pipe);
636         }
637
638         return 0;
639
640 }
641
642
643 /*
644  * vx_notify_end_of_buffer - send "end-of-buffer" notifier at the given pipe
645  * @pipe: the pipe to notify
646  *
647  * NB: call with a certain lock.
648  */
649 static int vx_notify_end_of_buffer(struct vx_core *chip, struct vx_pipe *pipe)
650 {
651         int err;
652         struct vx_rmh rmh;  /* use a temporary rmh here */
653
654         /* Toggle Dsp Host Interface into Message mode */
655         vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
656         vx_init_rmh(&rmh, CMD_NOTIFY_END_OF_BUFFER);
657         vx_set_stream_cmd_params(&rmh, 0, pipe->number);
658         err = vx_send_msg_nolock(chip, &rmh);
659         if (err < 0)
660                 return err;
661         /* Toggle Dsp Host Interface back to sound transfer mode */
662         vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
663         return 0;
664 }
665
666 /*
667  * vx_pcm_playback_transfer_chunk - transfer a single chunk
668  * @subs: substream
669  * @pipe: the pipe to transfer
670  * @size: chunk size in bytes
671  *
672  * transfer a single buffer chunk.  EOB notificaton is added after that.
673  * called from the interrupt handler, too.
674  *
675  * return 0 if ok.
676  */
677 static int vx_pcm_playback_transfer_chunk(struct vx_core *chip,
678                                           struct snd_pcm_runtime *runtime,
679                                           struct vx_pipe *pipe, int size)
680 {
681         int space, err = 0;
682
683         space = vx_query_hbuffer_size(chip, pipe);
684         if (space < 0) {
685                 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
686                 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
687                 snd_printd("error hbuffer\n");
688                 return space;
689         }
690         if (space < size) {
691                 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
692                 snd_printd("no enough hbuffer space %d\n", space);
693                 return -EIO; /* XRUN */
694         }
695                 
696         /* we don't need irqsave here, because this function
697          * is called from either trigger callback or irq handler
698          */
699         spin_lock(&chip->lock); 
700         vx_pseudo_dma_write(chip, runtime, pipe, size);
701         err = vx_notify_end_of_buffer(chip, pipe);
702         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
703         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
704         spin_unlock(&chip->lock);
705         return err;
706 }
707
708 /*
709  * update the position of the given pipe.
710  * pipe->position is updated and wrapped within the buffer size.
711  * pipe->transferred is updated, too, but the size is not wrapped,
712  * so that the caller can check the total transferred size later
713  * (to call snd_pcm_period_elapsed).
714  */
715 static int vx_update_pipe_position(struct vx_core *chip,
716                                    struct snd_pcm_runtime *runtime,
717                                    struct vx_pipe *pipe)
718 {
719         struct vx_rmh rmh;
720         int err, update;
721         u64 count;
722
723         vx_init_rmh(&rmh, CMD_STREAM_SAMPLE_COUNT);
724         vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
725         err = vx_send_msg(chip, &rmh);
726         if (err < 0)
727                 return err;
728
729         count = ((u64)(rmh.Stat[0] & 0xfffff) << 24) | (u64)rmh.Stat[1];
730         update = (int)(count - pipe->cur_count);
731         pipe->cur_count = count;
732         pipe->position += update;
733         if (pipe->position >= (int)runtime->buffer_size)
734                 pipe->position %= runtime->buffer_size;
735         pipe->transferred += update;
736         return 0;
737 }
738
739 /*
740  * transfer the pending playback buffer data to DSP
741  * called from interrupt handler
742  */
743 static void vx_pcm_playback_transfer(struct vx_core *chip,
744                                      struct snd_pcm_substream *subs,
745                                      struct vx_pipe *pipe, int nchunks)
746 {
747         int i, err;
748         struct snd_pcm_runtime *runtime = subs->runtime;
749
750         if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
751                 return;
752         for (i = 0; i < nchunks; i++) {
753                 if ((err = vx_pcm_playback_transfer_chunk(chip, runtime, pipe,
754                                                           chip->ibl.size)) < 0)
755                         return;
756         }
757 }
758
759 /*
760  * update the playback position and call snd_pcm_period_elapsed() if necessary
761  * called from interrupt handler
762  */
763 static void vx_pcm_playback_update(struct vx_core *chip,
764                                    struct snd_pcm_substream *subs,
765                                    struct vx_pipe *pipe)
766 {
767         int err;
768         struct snd_pcm_runtime *runtime = subs->runtime;
769
770         if (pipe->running && ! (chip->chip_status & VX_STAT_IS_STALE)) {
771                 if ((err = vx_update_pipe_position(chip, runtime, pipe)) < 0)
772                         return;
773                 if (pipe->transferred >= (int)runtime->period_size) {
774                         pipe->transferred %= runtime->period_size;
775                         snd_pcm_period_elapsed(subs);
776                 }
777         }
778 }
779
780 /*
781  * start the stream and pipe.
782  * this function is called from tasklet, which is invoked by the trigger
783  * START callback.
784  */
785 static void vx_pcm_delayed_start(unsigned long arg)
786 {
787         struct snd_pcm_substream *subs = (struct snd_pcm_substream *)arg;
788         struct vx_core *chip = subs->pcm->private_data;
789         struct vx_pipe *pipe = subs->runtime->private_data;
790         int err;
791
792         /*  printk( KERN_DEBUG "DDDD tasklet delayed start jiffies = %ld\n", jiffies);*/
793
794         if ((err = vx_start_stream(chip, pipe)) < 0) {
795                 snd_printk(KERN_ERR "vx: cannot start stream\n");
796                 return;
797         }
798         if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0) {
799                 snd_printk(KERN_ERR "vx: cannot start pipe\n");
800                 return;
801         }
802         /*   printk( KERN_DEBUG "dddd tasklet delayed start jiffies = %ld \n", jiffies);*/
803 }
804
805 /*
806  * vx_pcm_playback_trigger - trigger callback for playback
807  */
808 static int vx_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
809 {
810         struct vx_core *chip = snd_pcm_substream_chip(subs);
811         struct vx_pipe *pipe = subs->runtime->private_data;
812         int err;
813
814         if (chip->chip_status & VX_STAT_IS_STALE)
815                 return -EBUSY;
816                 
817         switch (cmd) {
818         case SNDRV_PCM_TRIGGER_START:
819         case SNDRV_PCM_TRIGGER_RESUME:
820                 if (! pipe->is_capture)
821                         vx_pcm_playback_transfer(chip, subs, pipe, 2);
822                 /* FIXME:
823                  * we trigger the pipe using tasklet, so that the interrupts are
824                  * issued surely after the trigger is completed.
825                  */ 
826                 tasklet_schedule(&pipe->start_tq);
827                 chip->pcm_running++;
828                 pipe->running = 1;
829                 break;
830         case SNDRV_PCM_TRIGGER_STOP:
831         case SNDRV_PCM_TRIGGER_SUSPEND:
832                 vx_toggle_pipe(chip, pipe, 0);
833                 vx_stop_pipe(chip, pipe);
834                 vx_stop_stream(chip, pipe);
835                 chip->pcm_running--;
836                 pipe->running = 0;
837                 break;
838         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
839                 if ((err = vx_toggle_pipe(chip, pipe, 0)) < 0)
840                         return err;
841                 break;
842         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
843                 if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0)
844                         return err;
845                 break;
846         default:
847                 return -EINVAL;
848         }
849         return 0;
850 }
851
852 /*
853  * vx_pcm_playback_pointer - pointer callback for playback
854  */
855 static snd_pcm_uframes_t vx_pcm_playback_pointer(struct snd_pcm_substream *subs)
856 {
857         struct snd_pcm_runtime *runtime = subs->runtime;
858         struct vx_pipe *pipe = runtime->private_data;
859         return pipe->position;
860 }
861
862 /*
863  * vx_pcm_hw_params - hw_params callback for playback and capture
864  */
865 static int vx_pcm_hw_params(struct snd_pcm_substream *subs,
866                                      struct snd_pcm_hw_params *hw_params)
867 {
868         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
869 }
870
871 /*
872  * vx_pcm_hw_free - hw_free callback for playback and capture
873  */
874 static int vx_pcm_hw_free(struct snd_pcm_substream *subs)
875 {
876         return snd_pcm_free_vmalloc_buffer(subs);
877 }
878
879 /*
880  * vx_pcm_prepare - prepare callback for playback and capture
881  */
882 static int vx_pcm_prepare(struct snd_pcm_substream *subs)
883 {
884         struct vx_core *chip = snd_pcm_substream_chip(subs);
885         struct snd_pcm_runtime *runtime = subs->runtime;
886         struct vx_pipe *pipe = runtime->private_data;
887         int err, data_mode;
888         // int max_size, nchunks;
889
890         if (chip->chip_status & VX_STAT_IS_STALE)
891                 return -EBUSY;
892
893         data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
894         if (data_mode != pipe->data_mode && ! pipe->is_capture) {
895                 /* IEC958 status (raw-mode) was changed */
896                 /* we reopen the pipe */
897                 struct vx_rmh rmh;
898                 snd_printdd(KERN_DEBUG "reopen the pipe with data_mode = %d\n", data_mode);
899                 vx_init_rmh(&rmh, CMD_FREE_PIPE);
900                 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, 0);
901                 if ((err = vx_send_msg(chip, &rmh)) < 0)
902                         return err;
903                 vx_init_rmh(&rmh, CMD_RES_PIPE);
904                 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, pipe->channels);
905                 if (data_mode)
906                         rmh.Cmd[0] |= BIT_DATA_MODE;
907                 if ((err = vx_send_msg(chip, &rmh)) < 0)
908                         return err;
909                 pipe->data_mode = data_mode;
910         }
911
912         if (chip->pcm_running && chip->freq != runtime->rate) {
913                 snd_printk(KERN_ERR "vx: cannot set different clock %d "
914                            "from the current %d\n", runtime->rate, chip->freq);
915                 return -EINVAL;
916         }
917         vx_set_clock(chip, runtime->rate);
918
919         if ((err = vx_set_format(chip, pipe, runtime)) < 0)
920                 return err;
921
922         if (vx_is_pcmcia(chip)) {
923                 pipe->align = 2; /* 16bit word */
924         } else {
925                 pipe->align = 4; /* 32bit word */
926         }
927
928         pipe->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
929         pipe->period_bytes = frames_to_bytes(runtime, runtime->period_size);
930         pipe->hw_ptr = 0;
931
932         /* set the timestamp */
933         vx_update_pipe_position(chip, runtime, pipe);
934         /* clear again */
935         pipe->transferred = 0;
936         pipe->position = 0;
937
938         pipe->prepared = 1;
939
940         return 0;
941 }
942
943
944 /*
945  * operators for PCM playback
946  */
947 static struct snd_pcm_ops vx_pcm_playback_ops = {
948         .open =         vx_pcm_playback_open,
949         .close =        vx_pcm_playback_close,
950         .ioctl =        snd_pcm_lib_ioctl,
951         .hw_params =    vx_pcm_hw_params,
952         .hw_free =      vx_pcm_hw_free,
953         .prepare =      vx_pcm_prepare,
954         .trigger =      vx_pcm_trigger,
955         .pointer =      vx_pcm_playback_pointer,
956         .page =         snd_pcm_get_vmalloc_page,
957 };
958
959
960 /*
961  * playback hw information
962  */
963
964 static struct snd_pcm_hardware vx_pcm_capture_hw = {
965         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
966                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
967                                  /*SNDRV_PCM_INFO_RESUME*/),
968         .formats =              (/*SNDRV_PCM_FMTBIT_U8 |*/
969                                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
970         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
971         .rate_min =             5000,
972         .rate_max =             48000,
973         .channels_min =         1,
974         .channels_max =         2,
975         .buffer_bytes_max =     (128*1024),
976         .period_bytes_min =     126,
977         .period_bytes_max =     (128*1024),
978         .periods_min =          2,
979         .periods_max =          VX_MAX_PERIODS,
980         .fifo_size =            126,
981 };
982
983
984 /*
985  * vx_pcm_capture_open - open callback for capture
986  */
987 static int vx_pcm_capture_open(struct snd_pcm_substream *subs)
988 {
989         struct snd_pcm_runtime *runtime = subs->runtime;
990         struct vx_core *chip = snd_pcm_substream_chip(subs);
991         struct vx_pipe *pipe;
992         struct vx_pipe *pipe_out_monitoring = NULL;
993         unsigned int audio;
994         int err;
995
996         if (chip->chip_status & VX_STAT_IS_STALE)
997                 return -EBUSY;
998
999         audio = subs->pcm->device * 2;
1000         if (snd_BUG_ON(audio >= chip->audio_ins))
1001                 return -EINVAL;
1002         err = vx_alloc_pipe(chip, 1, audio, 2, &pipe);
1003         if (err < 0)
1004                 return err;
1005         pipe->substream = subs;
1006         tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
1007         chip->capture_pipes[audio] = pipe;
1008
1009         /* check if monitoring is needed */
1010         if (chip->audio_monitor_active[audio]) {
1011                 pipe_out_monitoring = chip->playback_pipes[audio];
1012                 if (! pipe_out_monitoring) {
1013                         /* allocate a pipe */
1014                         err = vx_alloc_pipe(chip, 0, audio, 2, &pipe_out_monitoring);
1015                         if (err < 0)
1016                                 return err;
1017                         chip->playback_pipes[audio] = pipe_out_monitoring;
1018                 }
1019                 pipe_out_monitoring->references++;
1020                 /* 
1021                    if an output pipe is available, it's audios still may need to be 
1022                    unmuted. hence we'll have to call a mixer entry point.
1023                 */
1024                 vx_set_monitor_level(chip, audio, chip->audio_monitor[audio],
1025                                      chip->audio_monitor_active[audio]);
1026                 /* assuming stereo */
1027                 vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1],
1028                                      chip->audio_monitor_active[audio+1]); 
1029         }
1030
1031         pipe->monitoring_pipe = pipe_out_monitoring; /* default value NULL */
1032
1033         runtime->hw = vx_pcm_capture_hw;
1034         runtime->hw.period_bytes_min = chip->ibl.size;
1035         runtime->private_data = pipe;
1036
1037         /* align to 4 bytes (otherwise will be problematic when 24bit is used) */ 
1038         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
1039         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
1040
1041         return 0;
1042 }
1043
1044 /*
1045  * vx_pcm_capture_close - close callback for capture
1046  */
1047 static int vx_pcm_capture_close(struct snd_pcm_substream *subs)
1048 {
1049         struct vx_core *chip = snd_pcm_substream_chip(subs);
1050         struct vx_pipe *pipe;
1051         struct vx_pipe *pipe_out_monitoring;
1052         
1053         if (! subs->runtime->private_data)
1054                 return -EINVAL;
1055         pipe = subs->runtime->private_data;
1056         chip->capture_pipes[pipe->number] = NULL;
1057
1058         pipe_out_monitoring = pipe->monitoring_pipe;
1059
1060         /*
1061           if an output pipe is attached to this input, 
1062           check if it needs to be released.
1063         */
1064         if (pipe_out_monitoring) {
1065                 if (--pipe_out_monitoring->references == 0) {
1066                         vx_free_pipe(chip, pipe_out_monitoring);
1067                         chip->playback_pipes[pipe->number] = NULL;
1068                         pipe->monitoring_pipe = NULL;
1069                 }
1070         }
1071         
1072         vx_free_pipe(chip, pipe);
1073         return 0;
1074 }
1075
1076
1077
1078 #define DMA_READ_ALIGN  6       /* hardware alignment for read */
1079
1080 /*
1081  * vx_pcm_capture_update - update the capture buffer
1082  */
1083 static void vx_pcm_capture_update(struct vx_core *chip, struct snd_pcm_substream *subs,
1084                                   struct vx_pipe *pipe)
1085 {
1086         int size, space, count;
1087         struct snd_pcm_runtime *runtime = subs->runtime;
1088
1089         if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
1090                 return;
1091
1092         size = runtime->buffer_size - snd_pcm_capture_avail(runtime);
1093         if (! size)
1094                 return;
1095         size = frames_to_bytes(runtime, size);
1096         space = vx_query_hbuffer_size(chip, pipe);
1097         if (space < 0)
1098                 goto _error;
1099         if (size > space)
1100                 size = space;
1101         size = (size / 3) * 3; /* align to 3 bytes */
1102         if (size < DMA_READ_ALIGN)
1103                 goto _error;
1104
1105         /* keep the last 6 bytes, they will be read after disconnection */
1106         count = size - DMA_READ_ALIGN;
1107         /* read bytes until the current pointer reaches to the aligned position
1108          * for word-transfer
1109          */
1110         while (count > 0) {
1111                 if ((pipe->hw_ptr % pipe->align) == 0)
1112                         break;
1113                 if (vx_wait_for_rx_full(chip) < 0)
1114                         goto _error;
1115                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1116                 count -= 3;
1117         }
1118         if (count > 0) {
1119                 /* ok, let's accelerate! */
1120                 int align = pipe->align * 3;
1121                 space = (count / align) * align;
1122                 vx_pseudo_dma_read(chip, runtime, pipe, space);
1123                 count -= space;
1124         }
1125         /* read the rest of bytes */
1126         while (count > 0) {
1127                 if (vx_wait_for_rx_full(chip) < 0)
1128                         goto _error;
1129                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1130                 count -= 3;
1131         }
1132         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1133         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
1134         /* read the last pending 6 bytes */
1135         count = DMA_READ_ALIGN;
1136         while (count > 0) {
1137                 vx_pcm_read_per_bytes(chip, runtime, pipe);
1138                 count -= 3;
1139         }
1140         /* update the position */
1141         pipe->transferred += size;
1142         if (pipe->transferred >= pipe->period_bytes) {
1143                 pipe->transferred %= pipe->period_bytes;
1144                 snd_pcm_period_elapsed(subs);
1145         }
1146         return;
1147
1148  _error:
1149         /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1150         vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
1151         return;
1152 }
1153
1154 /*
1155  * vx_pcm_capture_pointer - pointer callback for capture
1156  */
1157 static snd_pcm_uframes_t vx_pcm_capture_pointer(struct snd_pcm_substream *subs)
1158 {
1159         struct snd_pcm_runtime *runtime = subs->runtime;
1160         struct vx_pipe *pipe = runtime->private_data;
1161         return bytes_to_frames(runtime, pipe->hw_ptr);
1162 }
1163
1164 /*
1165  * operators for PCM capture
1166  */
1167 static struct snd_pcm_ops vx_pcm_capture_ops = {
1168         .open =         vx_pcm_capture_open,
1169         .close =        vx_pcm_capture_close,
1170         .ioctl =        snd_pcm_lib_ioctl,
1171         .hw_params =    vx_pcm_hw_params,
1172         .hw_free =      vx_pcm_hw_free,
1173         .prepare =      vx_pcm_prepare,
1174         .trigger =      vx_pcm_trigger,
1175         .pointer =      vx_pcm_capture_pointer,
1176         .page =         snd_pcm_get_vmalloc_page,
1177 };
1178
1179
1180 /*
1181  * interrupt handler for pcm streams
1182  */
1183 void vx_pcm_update_intr(struct vx_core *chip, unsigned int events)
1184 {
1185         unsigned int i;
1186         struct vx_pipe *pipe;
1187
1188 #define EVENT_MASK      (END_OF_BUFFER_EVENTS_PENDING|ASYNC_EVENTS_PENDING)
1189
1190         if (events & EVENT_MASK) {
1191                 vx_init_rmh(&chip->irq_rmh, CMD_ASYNC);
1192                 if (events & ASYNC_EVENTS_PENDING)
1193                         chip->irq_rmh.Cmd[0] |= 0x00000001;     /* SEL_ASYNC_EVENTS */
1194                 if (events & END_OF_BUFFER_EVENTS_PENDING)
1195                         chip->irq_rmh.Cmd[0] |= 0x00000002;     /* SEL_END_OF_BUF_EVENTS */
1196
1197                 if (vx_send_msg(chip, &chip->irq_rmh) < 0) {
1198                         snd_printdd(KERN_ERR "msg send error!!\n");
1199                         return;
1200                 }
1201
1202                 i = 1;
1203                 while (i < chip->irq_rmh.LgStat) {
1204                         int p, buf, capture, eob;
1205                         p = chip->irq_rmh.Stat[i] & MASK_FIRST_FIELD;
1206                         capture = (chip->irq_rmh.Stat[i] & 0x400000) ? 1 : 0;
1207                         eob = (chip->irq_rmh.Stat[i] & 0x800000) ? 1 : 0;
1208                         i++;
1209                         if (events & ASYNC_EVENTS_PENDING)
1210                                 i++;
1211                         buf = 1; /* force to transfer */
1212                         if (events & END_OF_BUFFER_EVENTS_PENDING) {
1213                                 if (eob)
1214                                         buf = chip->irq_rmh.Stat[i];
1215                                 i++;
1216                         }
1217                         if (capture)
1218                                 continue;
1219                         if (snd_BUG_ON(p < 0 || p >= chip->audio_outs))
1220                                 continue;
1221                         pipe = chip->playback_pipes[p];
1222                         if (pipe && pipe->substream) {
1223                                 vx_pcm_playback_update(chip, pipe->substream, pipe);
1224                                 vx_pcm_playback_transfer(chip, pipe->substream, pipe, buf);
1225                         }
1226                 }
1227         }
1228
1229         /* update the capture pcm pointers as frequently as possible */
1230         for (i = 0; i < chip->audio_ins; i++) {
1231                 pipe = chip->capture_pipes[i];
1232                 if (pipe && pipe->substream)
1233                         vx_pcm_capture_update(chip, pipe->substream, pipe);
1234         }
1235 }
1236
1237
1238 /*
1239  * vx_init_audio_io - check the availabe audio i/o and allocate pipe arrays
1240  */
1241 static int vx_init_audio_io(struct vx_core *chip)
1242 {
1243         struct vx_rmh rmh;
1244         int preferred;
1245
1246         vx_init_rmh(&rmh, CMD_SUPPORTED);
1247         if (vx_send_msg(chip, &rmh) < 0) {
1248                 snd_printk(KERN_ERR "vx: cannot get the supported audio data\n");
1249                 return -ENXIO;
1250         }
1251
1252         chip->audio_outs = rmh.Stat[0] & MASK_FIRST_FIELD;
1253         chip->audio_ins = (rmh.Stat[0] >> (FIELD_SIZE*2)) & MASK_FIRST_FIELD;
1254         chip->audio_info = rmh.Stat[1];
1255
1256         /* allocate pipes */
1257         chip->playback_pipes = kcalloc(chip->audio_outs, sizeof(struct vx_pipe *), GFP_KERNEL);
1258         if (!chip->playback_pipes)
1259                 return -ENOMEM;
1260         chip->capture_pipes = kcalloc(chip->audio_ins, sizeof(struct vx_pipe *), GFP_KERNEL);
1261         if (!chip->capture_pipes) {
1262                 kfree(chip->playback_pipes);
1263                 return -ENOMEM;
1264         }
1265
1266         preferred = chip->ibl.size;
1267         chip->ibl.size = 0;
1268         vx_set_ibl(chip, &chip->ibl); /* query the info */
1269         if (preferred > 0) {
1270                 chip->ibl.size = ((preferred + chip->ibl.granularity - 1) /
1271                                   chip->ibl.granularity) * chip->ibl.granularity;
1272                 if (chip->ibl.size > chip->ibl.max_size)
1273                         chip->ibl.size = chip->ibl.max_size;
1274         } else
1275                 chip->ibl.size = chip->ibl.min_size; /* set to the minimum */
1276         vx_set_ibl(chip, &chip->ibl);
1277
1278         return 0;
1279 }
1280
1281
1282 /*
1283  * free callback for pcm
1284  */
1285 static void snd_vx_pcm_free(struct snd_pcm *pcm)
1286 {
1287         struct vx_core *chip = pcm->private_data;
1288         chip->pcm[pcm->device] = NULL;
1289         kfree(chip->playback_pipes);
1290         chip->playback_pipes = NULL;
1291         kfree(chip->capture_pipes);
1292         chip->capture_pipes = NULL;
1293 }
1294
1295 /*
1296  * snd_vx_pcm_new - create and initialize a pcm
1297  */
1298 int snd_vx_pcm_new(struct vx_core *chip)
1299 {
1300         struct snd_pcm *pcm;
1301         unsigned int i;
1302         int err;
1303
1304         if ((err = vx_init_audio_io(chip)) < 0)
1305                 return err;
1306
1307         for (i = 0; i < chip->hw->num_codecs; i++) {
1308                 unsigned int outs, ins;
1309                 outs = chip->audio_outs > i * 2 ? 1 : 0;
1310                 ins = chip->audio_ins > i * 2 ? 1 : 0;
1311                 if (! outs && ! ins)
1312                         break;
1313                 err = snd_pcm_new(chip->card, "VX PCM", i,
1314                                   outs, ins, &pcm);
1315                 if (err < 0)
1316                         return err;
1317                 if (outs)
1318                         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops);
1319                 if (ins)
1320                         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops);
1321
1322                 pcm->private_data = chip;
1323                 pcm->private_free = snd_vx_pcm_free;
1324                 pcm->info_flags = 0;
1325                 strcpy(pcm->name, chip->card->shortname);
1326                 chip->pcm[i] = pcm;
1327         }
1328
1329         return 0;
1330 }