1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for Digigram VX soundcards
7 * Copyright (c) 2002,2003 by Takashi Iwai <tiwai@suse.de>
10 * for playback, we send series of "chunks", which size is equal with the
11 * IBL size, typically 126 samples. at each end of chunk, the end-of-buffer
12 * interrupt is notified, and the interrupt handler will feed the next chunk.
14 * the current position is calculated from the sample count RMH.
15 * pipe->transferred is the counter of data which has been already transferred.
16 * if this counter reaches to the period size, snd_pcm_period_elapsed() will
19 * for capture, the situation is much easier.
20 * to get a low latency response, we'll check the capture streams at each
21 * interrupt (capture stream has no EOB notification). if the pending
22 * data is accumulated to the period size, snd_pcm_period_elapsed() is
23 * called and the pointer is updated.
25 * the current point of read buffer is kept in pipe->hw_ptr. note that
29 * - linked trigger for full-duplex mode.
30 * - scheduled action on the stream.
33 #include <linux/slab.h>
34 #include <linux/delay.h>
35 #include <sound/core.h>
36 #include <sound/asoundef.h>
37 #include <sound/pcm.h>
38 #include <sound/vx_core.h>
43 * read three pending pcm bytes via inb()
45 static void vx_pcm_read_per_bytes(struct vx_core *chip, struct snd_pcm_runtime *runtime,
48 int offset = pipe->hw_ptr;
49 unsigned char *buf = (unsigned char *)(runtime->dma_area + offset);
50 *buf++ = vx_inb(chip, RXH);
51 if (++offset >= pipe->buffer_bytes) {
53 buf = (unsigned char *)runtime->dma_area;
55 *buf++ = vx_inb(chip, RXM);
56 if (++offset >= pipe->buffer_bytes) {
58 buf = (unsigned char *)runtime->dma_area;
60 *buf++ = vx_inb(chip, RXL);
61 if (++offset >= pipe->buffer_bytes) {
64 pipe->hw_ptr = offset;
68 * vx_set_pcx_time - convert from the PC time to the RMH status time.
69 * @pc_time: the pointer for the PC-time to set
70 * @dsp_time: the pointer for RMH status time array
72 static void vx_set_pcx_time(struct vx_core *chip, pcx_time_t *pc_time,
73 unsigned int *dsp_time)
75 dsp_time[0] = (unsigned int)((*pc_time) >> 24) & PCX_TIME_HI_MASK;
76 dsp_time[1] = (unsigned int)(*pc_time) & MASK_DSP_WORD;
80 * vx_set_differed_time - set the differed time if specified
81 * @rmh: the rmh record to modify
82 * @pipe: the pipe to be checked
84 * if the pipe is programmed with the differed time, set the DSP time
85 * on the rmh and changes its command length.
87 * returns the increase of the command length.
89 static int vx_set_differed_time(struct vx_core *chip, struct vx_rmh *rmh,
92 /* Update The length added to the RMH command by the timestamp */
93 if (! (pipe->differed_type & DC_DIFFERED_DELAY))
97 rmh->Cmd[0] |= DSP_DIFFERED_COMMAND_MASK;
99 /* Time stamp is the 1st following parameter */
100 vx_set_pcx_time(chip, &pipe->pcx_time, &rmh->Cmd[1]);
102 /* Add the flags to a notified differed command */
103 if (pipe->differed_type & DC_NOTIFY_DELAY)
104 rmh->Cmd[1] |= NOTIFY_MASK_TIME_HIGH ;
106 /* Add the flags to a multiple differed command */
107 if (pipe->differed_type & DC_MULTIPLE_DELAY)
108 rmh->Cmd[1] |= MULTIPLE_MASK_TIME_HIGH;
110 /* Add the flags to a stream-time differed command */
111 if (pipe->differed_type & DC_STREAM_TIME_DELAY)
112 rmh->Cmd[1] |= STREAM_MASK_TIME_HIGH;
119 * vx_set_stream_format - send the stream format command
120 * @pipe: the affected pipe
121 * @data: format bitmask
123 static int vx_set_stream_format(struct vx_core *chip, struct vx_pipe *pipe,
128 vx_init_rmh(&rmh, pipe->is_capture ?
129 CMD_FORMAT_STREAM_IN : CMD_FORMAT_STREAM_OUT);
130 rmh.Cmd[0] |= pipe->number << FIELD_SIZE;
132 /* Command might be longer since we may have to add a timestamp */
133 vx_set_differed_time(chip, &rmh, pipe);
135 rmh.Cmd[rmh.LgCmd] = (data & 0xFFFFFF00) >> 8;
136 rmh.Cmd[rmh.LgCmd + 1] = (data & 0xFF) << 16 /*| (datal & 0xFFFF00) >> 8*/;
139 return vx_send_msg(chip, &rmh);
144 * vx_set_format - set the format of a pipe
145 * @pipe: the affected pipe
146 * @runtime: pcm runtime instance to be referred
148 * returns 0 if successful, or a negative error code.
150 static int vx_set_format(struct vx_core *chip, struct vx_pipe *pipe,
151 struct snd_pcm_runtime *runtime)
153 unsigned int header = HEADER_FMT_BASE;
155 if (runtime->channels == 1)
156 header |= HEADER_FMT_MONO;
157 if (snd_pcm_format_little_endian(runtime->format))
158 header |= HEADER_FMT_INTEL;
159 if (runtime->rate < 32000 && runtime->rate > 11025)
160 header |= HEADER_FMT_UPTO32;
161 else if (runtime->rate <= 11025)
162 header |= HEADER_FMT_UPTO11;
164 switch (snd_pcm_format_physical_width(runtime->format)) {
166 case 16: header |= HEADER_FMT_16BITS; break;
167 case 24: header |= HEADER_FMT_24BITS; break;
173 return vx_set_stream_format(chip, pipe, header);
177 * set / query the IBL size
179 static int vx_set_ibl(struct vx_core *chip, struct vx_ibl_info *info)
184 vx_init_rmh(&rmh, CMD_IBL);
185 rmh.Cmd[0] |= info->size & 0x03ffff;
186 err = vx_send_msg(chip, &rmh);
189 info->size = rmh.Stat[0];
190 info->max_size = rmh.Stat[1];
191 info->min_size = rmh.Stat[2];
192 info->granularity = rmh.Stat[3];
193 snd_printdd(KERN_DEBUG "vx_set_ibl: size = %d, max = %d, min = %d, gran = %d\n",
194 info->size, info->max_size, info->min_size, info->granularity);
200 * vx_get_pipe_state - get the state of a pipe
201 * @pipe: the pipe to be checked
202 * @state: the pointer for the returned state
204 * checks the state of a given pipe, and stores the state (1 = running,
205 * 0 = paused) on the given pointer.
207 * called from trigger callback only
209 static int vx_get_pipe_state(struct vx_core *chip, struct vx_pipe *pipe, int *state)
214 vx_init_rmh(&rmh, CMD_PIPE_STATE);
215 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
216 err = vx_send_msg(chip, &rmh);
218 *state = (rmh.Stat[0] & (1 << pipe->number)) ? 1 : 0;
224 * vx_query_hbuffer_size - query available h-buffer size in bytes
225 * @pipe: the pipe to be checked
227 * return the available size on h-buffer in bytes,
228 * or a negative error code.
230 * NOTE: calling this function always switches to the stream mode.
231 * you'll need to disconnect the host to get back to the
234 static int vx_query_hbuffer_size(struct vx_core *chip, struct vx_pipe *pipe)
239 vx_init_rmh(&rmh, CMD_SIZE_HBUFFER);
240 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
241 if (pipe->is_capture)
242 rmh.Cmd[0] |= 0x00000001;
243 result = vx_send_msg(chip, &rmh);
245 result = rmh.Stat[0] & 0xffff;
251 * vx_pipe_can_start - query whether a pipe is ready for start
252 * @pipe: the pipe to be checked
254 * return 1 if ready, 0 if not ready, and negative value on error.
256 * called from trigger callback only
258 static int vx_pipe_can_start(struct vx_core *chip, struct vx_pipe *pipe)
263 vx_init_rmh(&rmh, CMD_CAN_START_PIPE);
264 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
267 err = vx_send_msg(chip, &rmh);
276 * vx_conf_pipe - tell the pipe to stand by and wait for IRQA.
277 * @pipe: the pipe to be configured
279 static int vx_conf_pipe(struct vx_core *chip, struct vx_pipe *pipe)
283 vx_init_rmh(&rmh, CMD_CONF_PIPE);
284 if (pipe->is_capture)
285 rmh.Cmd[0] |= COMMAND_RECORD_MASK;
286 rmh.Cmd[1] = 1 << pipe->number;
287 return vx_send_msg(chip, &rmh);
291 * vx_send_irqa - trigger IRQA
293 static int vx_send_irqa(struct vx_core *chip)
297 vx_init_rmh(&rmh, CMD_SEND_IRQA);
298 return vx_send_msg(chip, &rmh);
302 #define MAX_WAIT_FOR_DSP 250
304 * vx boards do not support inter-card sync, besides
305 * only 126 samples require to be prepared before a pipe can start
307 #define CAN_START_DELAY 2 /* wait 2ms only before asking if the pipe is ready*/
308 #define WAIT_STATE_DELAY 2 /* wait 2ms after irqA was requested and check if the pipe state toggled*/
311 * vx_toggle_pipe - start / pause a pipe
312 * @pipe: the pipe to be triggered
313 * @state: start = 1, pause = 0
315 * called from trigger callback only
318 static int vx_toggle_pipe(struct vx_core *chip, struct vx_pipe *pipe, int state)
320 int err, i, cur_state;
322 /* Check the pipe is not already in the requested state */
323 if (vx_get_pipe_state(chip, pipe, &cur_state) < 0)
325 if (state == cur_state)
328 /* If a start is requested, ask the DSP to get prepared
329 * and wait for a positive acknowledge (when there are
330 * enough sound buffer for this pipe)
333 for (i = 0 ; i < MAX_WAIT_FOR_DSP; i++) {
334 err = vx_pipe_can_start(chip, pipe);
337 /* Wait for a few, before asking again
338 * to avoid flooding the DSP with our requests
344 if ((err = vx_conf_pipe(chip, pipe)) < 0)
347 if ((err = vx_send_irqa(chip)) < 0)
350 /* If it completes successfully, wait for the pipes
351 * reaching the expected state before returning
352 * Check one pipe only (since they are synchronous)
354 for (i = 0; i < MAX_WAIT_FOR_DSP; i++) {
355 err = vx_get_pipe_state(chip, pipe, &cur_state);
356 if (err < 0 || cur_state == state)
361 return err < 0 ? -EIO : 0;
366 * vx_stop_pipe - stop a pipe
367 * @pipe: the pipe to be stopped
369 * called from trigger callback only
371 static int vx_stop_pipe(struct vx_core *chip, struct vx_pipe *pipe)
374 vx_init_rmh(&rmh, CMD_STOP_PIPE);
375 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
376 return vx_send_msg(chip, &rmh);
381 * vx_alloc_pipe - allocate a pipe and initialize the pipe instance
382 * @capture: 0 = playback, 1 = capture operation
383 * @audioid: the audio id to be assigned
384 * @num_audio: number of audio channels
385 * @pipep: the returned pipe instance
387 * return 0 on success, or a negative error code.
389 static int vx_alloc_pipe(struct vx_core *chip, int capture,
390 int audioid, int num_audio,
391 struct vx_pipe **pipep)
394 struct vx_pipe *pipe;
399 vx_init_rmh(&rmh, CMD_RES_PIPE);
400 vx_set_pipe_cmd_params(&rmh, capture, audioid, num_audio);
402 if (underrun_skip_sound)
403 rmh.Cmd[0] |= BIT_SKIP_SOUND;
405 data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
406 if (! capture && data_mode)
407 rmh.Cmd[0] |= BIT_DATA_MODE;
408 err = vx_send_msg(chip, &rmh);
412 /* initialize the pipe record */
413 pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
415 /* release the pipe */
416 vx_init_rmh(&rmh, CMD_FREE_PIPE);
417 vx_set_pipe_cmd_params(&rmh, capture, audioid, 0);
418 vx_send_msg(chip, &rmh);
422 /* the pipe index should be identical with the audio index */
423 pipe->number = audioid;
424 pipe->is_capture = capture;
425 pipe->channels = num_audio;
426 pipe->differed_type = 0;
428 pipe->data_mode = data_mode;
436 * vx_free_pipe - release a pipe
437 * @pipe: pipe to be released
439 static int vx_free_pipe(struct vx_core *chip, struct vx_pipe *pipe)
443 vx_init_rmh(&rmh, CMD_FREE_PIPE);
444 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
445 vx_send_msg(chip, &rmh);
453 * vx_start_stream - start the stream
455 * called from trigger callback only
457 static int vx_start_stream(struct vx_core *chip, struct vx_pipe *pipe)
461 vx_init_rmh(&rmh, CMD_START_ONE_STREAM);
462 vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
463 vx_set_differed_time(chip, &rmh, pipe);
464 return vx_send_msg(chip, &rmh);
469 * vx_stop_stream - stop the stream
471 * called from trigger callback only
473 static int vx_stop_stream(struct vx_core *chip, struct vx_pipe *pipe)
477 vx_init_rmh(&rmh, CMD_STOP_STREAM);
478 vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
479 return vx_send_msg(chip, &rmh);
484 * playback hw information
487 static const struct snd_pcm_hardware vx_pcm_playback_hw = {
488 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
489 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
490 /*SNDRV_PCM_INFO_RESUME*/),
491 .formats = (/*SNDRV_PCM_FMTBIT_U8 |*/
492 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
493 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
498 .buffer_bytes_max = (128*1024),
499 .period_bytes_min = 126,
500 .period_bytes_max = (128*1024),
502 .periods_max = VX_MAX_PERIODS,
508 * vx_pcm_playback_open - open callback for playback
510 static int vx_pcm_playback_open(struct snd_pcm_substream *subs)
512 struct snd_pcm_runtime *runtime = subs->runtime;
513 struct vx_core *chip = snd_pcm_substream_chip(subs);
514 struct vx_pipe *pipe = NULL;
518 if (chip->chip_status & VX_STAT_IS_STALE)
521 audio = subs->pcm->device * 2;
522 if (snd_BUG_ON(audio >= chip->audio_outs))
525 /* playback pipe may have been already allocated for monitoring */
526 pipe = chip->playback_pipes[audio];
528 /* not allocated yet */
529 err = vx_alloc_pipe(chip, 0, audio, 2, &pipe); /* stereo playback */
533 /* open for playback */
536 pipe->substream = subs;
537 chip->playback_pipes[audio] = pipe;
539 runtime->hw = vx_pcm_playback_hw;
540 runtime->hw.period_bytes_min = chip->ibl.size;
541 runtime->private_data = pipe;
543 /* align to 4 bytes (otherwise will be problematic when 24bit is used) */
544 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
545 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
551 * vx_pcm_playback_close - close callback for playback
553 static int vx_pcm_playback_close(struct snd_pcm_substream *subs)
555 struct vx_core *chip = snd_pcm_substream_chip(subs);
556 struct vx_pipe *pipe;
558 if (! subs->runtime->private_data)
561 pipe = subs->runtime->private_data;
563 if (--pipe->references == 0) {
564 chip->playback_pipes[pipe->number] = NULL;
565 vx_free_pipe(chip, pipe);
574 * vx_notify_end_of_buffer - send "end-of-buffer" notifier at the given pipe
575 * @pipe: the pipe to notify
577 * NB: call with a certain lock.
579 static int vx_notify_end_of_buffer(struct vx_core *chip, struct vx_pipe *pipe)
582 struct vx_rmh rmh; /* use a temporary rmh here */
584 /* Toggle Dsp Host Interface into Message mode */
585 vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
586 vx_init_rmh(&rmh, CMD_NOTIFY_END_OF_BUFFER);
587 vx_set_stream_cmd_params(&rmh, 0, pipe->number);
588 err = vx_send_msg_nolock(chip, &rmh);
591 /* Toggle Dsp Host Interface back to sound transfer mode */
592 vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
597 * vx_pcm_playback_transfer_chunk - transfer a single chunk
599 * @pipe: the pipe to transfer
600 * @size: chunk size in bytes
602 * transfer a single buffer chunk. EOB notificaton is added after that.
603 * called from the interrupt handler, too.
607 static int vx_pcm_playback_transfer_chunk(struct vx_core *chip,
608 struct snd_pcm_runtime *runtime,
609 struct vx_pipe *pipe, int size)
613 space = vx_query_hbuffer_size(chip, pipe);
615 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
616 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
617 snd_printd("error hbuffer\n");
621 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
622 snd_printd("no enough hbuffer space %d\n", space);
623 return -EIO; /* XRUN */
626 /* we don't need irqsave here, because this function
627 * is called from either trigger callback or irq handler
629 mutex_lock(&chip->lock);
630 vx_pseudo_dma_write(chip, runtime, pipe, size);
631 err = vx_notify_end_of_buffer(chip, pipe);
632 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
633 vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
634 mutex_unlock(&chip->lock);
639 * update the position of the given pipe.
640 * pipe->position is updated and wrapped within the buffer size.
641 * pipe->transferred is updated, too, but the size is not wrapped,
642 * so that the caller can check the total transferred size later
643 * (to call snd_pcm_period_elapsed).
645 static int vx_update_pipe_position(struct vx_core *chip,
646 struct snd_pcm_runtime *runtime,
647 struct vx_pipe *pipe)
653 vx_init_rmh(&rmh, CMD_STREAM_SAMPLE_COUNT);
654 vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
655 err = vx_send_msg(chip, &rmh);
659 count = ((u64)(rmh.Stat[0] & 0xfffff) << 24) | (u64)rmh.Stat[1];
660 update = (int)(count - pipe->cur_count);
661 pipe->cur_count = count;
662 pipe->position += update;
663 if (pipe->position >= (int)runtime->buffer_size)
664 pipe->position %= runtime->buffer_size;
665 pipe->transferred += update;
670 * transfer the pending playback buffer data to DSP
671 * called from interrupt handler
673 static void vx_pcm_playback_transfer(struct vx_core *chip,
674 struct snd_pcm_substream *subs,
675 struct vx_pipe *pipe, int nchunks)
678 struct snd_pcm_runtime *runtime = subs->runtime;
680 if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
682 for (i = 0; i < nchunks; i++) {
683 if ((err = vx_pcm_playback_transfer_chunk(chip, runtime, pipe,
684 chip->ibl.size)) < 0)
690 * update the playback position and call snd_pcm_period_elapsed() if necessary
691 * called from interrupt handler
693 static void vx_pcm_playback_update(struct vx_core *chip,
694 struct snd_pcm_substream *subs,
695 struct vx_pipe *pipe)
698 struct snd_pcm_runtime *runtime = subs->runtime;
700 if (pipe->running && ! (chip->chip_status & VX_STAT_IS_STALE)) {
701 if ((err = vx_update_pipe_position(chip, runtime, pipe)) < 0)
703 if (pipe->transferred >= (int)runtime->period_size) {
704 pipe->transferred %= runtime->period_size;
705 snd_pcm_period_elapsed(subs);
711 * vx_pcm_playback_trigger - trigger callback for playback
713 static int vx_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
715 struct vx_core *chip = snd_pcm_substream_chip(subs);
716 struct vx_pipe *pipe = subs->runtime->private_data;
719 if (chip->chip_status & VX_STAT_IS_STALE)
723 case SNDRV_PCM_TRIGGER_START:
724 case SNDRV_PCM_TRIGGER_RESUME:
725 if (! pipe->is_capture)
726 vx_pcm_playback_transfer(chip, subs, pipe, 2);
727 err = vx_start_stream(chip, pipe);
729 pr_debug("vx: cannot start stream\n");
732 err = vx_toggle_pipe(chip, pipe, 1);
734 pr_debug("vx: cannot start pipe\n");
735 vx_stop_stream(chip, pipe);
741 case SNDRV_PCM_TRIGGER_STOP:
742 case SNDRV_PCM_TRIGGER_SUSPEND:
743 vx_toggle_pipe(chip, pipe, 0);
744 vx_stop_pipe(chip, pipe);
745 vx_stop_stream(chip, pipe);
749 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
750 if ((err = vx_toggle_pipe(chip, pipe, 0)) < 0)
753 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
754 if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0)
764 * vx_pcm_playback_pointer - pointer callback for playback
766 static snd_pcm_uframes_t vx_pcm_playback_pointer(struct snd_pcm_substream *subs)
768 struct snd_pcm_runtime *runtime = subs->runtime;
769 struct vx_pipe *pipe = runtime->private_data;
770 return pipe->position;
774 * vx_pcm_prepare - prepare callback for playback and capture
776 static int vx_pcm_prepare(struct snd_pcm_substream *subs)
778 struct vx_core *chip = snd_pcm_substream_chip(subs);
779 struct snd_pcm_runtime *runtime = subs->runtime;
780 struct vx_pipe *pipe = runtime->private_data;
782 // int max_size, nchunks;
784 if (chip->chip_status & VX_STAT_IS_STALE)
787 data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
788 if (data_mode != pipe->data_mode && ! pipe->is_capture) {
789 /* IEC958 status (raw-mode) was changed */
790 /* we reopen the pipe */
792 snd_printdd(KERN_DEBUG "reopen the pipe with data_mode = %d\n", data_mode);
793 vx_init_rmh(&rmh, CMD_FREE_PIPE);
794 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, 0);
795 if ((err = vx_send_msg(chip, &rmh)) < 0)
797 vx_init_rmh(&rmh, CMD_RES_PIPE);
798 vx_set_pipe_cmd_params(&rmh, 0, pipe->number, pipe->channels);
800 rmh.Cmd[0] |= BIT_DATA_MODE;
801 if ((err = vx_send_msg(chip, &rmh)) < 0)
803 pipe->data_mode = data_mode;
806 if (chip->pcm_running && chip->freq != runtime->rate) {
807 snd_printk(KERN_ERR "vx: cannot set different clock %d "
808 "from the current %d\n", runtime->rate, chip->freq);
811 vx_set_clock(chip, runtime->rate);
813 if ((err = vx_set_format(chip, pipe, runtime)) < 0)
816 if (vx_is_pcmcia(chip)) {
817 pipe->align = 2; /* 16bit word */
819 pipe->align = 4; /* 32bit word */
822 pipe->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
823 pipe->period_bytes = frames_to_bytes(runtime, runtime->period_size);
826 /* set the timestamp */
827 vx_update_pipe_position(chip, runtime, pipe);
829 pipe->transferred = 0;
839 * operators for PCM playback
841 static const struct snd_pcm_ops vx_pcm_playback_ops = {
842 .open = vx_pcm_playback_open,
843 .close = vx_pcm_playback_close,
844 .prepare = vx_pcm_prepare,
845 .trigger = vx_pcm_trigger,
846 .pointer = vx_pcm_playback_pointer,
851 * playback hw information
854 static const struct snd_pcm_hardware vx_pcm_capture_hw = {
855 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
856 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
857 /*SNDRV_PCM_INFO_RESUME*/),
858 .formats = (/*SNDRV_PCM_FMTBIT_U8 |*/
859 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
860 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
865 .buffer_bytes_max = (128*1024),
866 .period_bytes_min = 126,
867 .period_bytes_max = (128*1024),
869 .periods_max = VX_MAX_PERIODS,
875 * vx_pcm_capture_open - open callback for capture
877 static int vx_pcm_capture_open(struct snd_pcm_substream *subs)
879 struct snd_pcm_runtime *runtime = subs->runtime;
880 struct vx_core *chip = snd_pcm_substream_chip(subs);
881 struct vx_pipe *pipe;
882 struct vx_pipe *pipe_out_monitoring = NULL;
886 if (chip->chip_status & VX_STAT_IS_STALE)
889 audio = subs->pcm->device * 2;
890 if (snd_BUG_ON(audio >= chip->audio_ins))
892 err = vx_alloc_pipe(chip, 1, audio, 2, &pipe);
895 pipe->substream = subs;
896 chip->capture_pipes[audio] = pipe;
898 /* check if monitoring is needed */
899 if (chip->audio_monitor_active[audio]) {
900 pipe_out_monitoring = chip->playback_pipes[audio];
901 if (! pipe_out_monitoring) {
902 /* allocate a pipe */
903 err = vx_alloc_pipe(chip, 0, audio, 2, &pipe_out_monitoring);
906 chip->playback_pipes[audio] = pipe_out_monitoring;
908 pipe_out_monitoring->references++;
910 if an output pipe is available, it's audios still may need to be
911 unmuted. hence we'll have to call a mixer entry point.
913 vx_set_monitor_level(chip, audio, chip->audio_monitor[audio],
914 chip->audio_monitor_active[audio]);
915 /* assuming stereo */
916 vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1],
917 chip->audio_monitor_active[audio+1]);
920 pipe->monitoring_pipe = pipe_out_monitoring; /* default value NULL */
922 runtime->hw = vx_pcm_capture_hw;
923 runtime->hw.period_bytes_min = chip->ibl.size;
924 runtime->private_data = pipe;
926 /* align to 4 bytes (otherwise will be problematic when 24bit is used) */
927 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
928 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
934 * vx_pcm_capture_close - close callback for capture
936 static int vx_pcm_capture_close(struct snd_pcm_substream *subs)
938 struct vx_core *chip = snd_pcm_substream_chip(subs);
939 struct vx_pipe *pipe;
940 struct vx_pipe *pipe_out_monitoring;
942 if (! subs->runtime->private_data)
944 pipe = subs->runtime->private_data;
945 chip->capture_pipes[pipe->number] = NULL;
947 pipe_out_monitoring = pipe->monitoring_pipe;
950 if an output pipe is attached to this input,
951 check if it needs to be released.
953 if (pipe_out_monitoring) {
954 if (--pipe_out_monitoring->references == 0) {
955 vx_free_pipe(chip, pipe_out_monitoring);
956 chip->playback_pipes[pipe->number] = NULL;
957 pipe->monitoring_pipe = NULL;
961 vx_free_pipe(chip, pipe);
967 #define DMA_READ_ALIGN 6 /* hardware alignment for read */
970 * vx_pcm_capture_update - update the capture buffer
972 static void vx_pcm_capture_update(struct vx_core *chip, struct snd_pcm_substream *subs,
973 struct vx_pipe *pipe)
975 int size, space, count;
976 struct snd_pcm_runtime *runtime = subs->runtime;
978 if (!pipe->running || (chip->chip_status & VX_STAT_IS_STALE))
981 size = runtime->buffer_size - snd_pcm_capture_avail(runtime);
984 size = frames_to_bytes(runtime, size);
985 space = vx_query_hbuffer_size(chip, pipe);
990 size = (size / 3) * 3; /* align to 3 bytes */
991 if (size < DMA_READ_ALIGN)
994 /* keep the last 6 bytes, they will be read after disconnection */
995 count = size - DMA_READ_ALIGN;
996 /* read bytes until the current pointer reaches to the aligned position
1000 if ((pipe->hw_ptr % pipe->align) == 0)
1002 if (vx_wait_for_rx_full(chip) < 0)
1004 vx_pcm_read_per_bytes(chip, runtime, pipe);
1008 /* ok, let's accelerate! */
1009 int align = pipe->align * 3;
1010 space = (count / align) * align;
1012 vx_pseudo_dma_read(chip, runtime, pipe, space);
1016 /* read the rest of bytes */
1018 if (vx_wait_for_rx_full(chip) < 0)
1020 vx_pcm_read_per_bytes(chip, runtime, pipe);
1023 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1024 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
1025 /* read the last pending 6 bytes */
1026 count = DMA_READ_ALIGN;
1028 vx_pcm_read_per_bytes(chip, runtime, pipe);
1031 /* update the position */
1032 pipe->transferred += size;
1033 if (pipe->transferred >= pipe->period_bytes) {
1034 pipe->transferred %= pipe->period_bytes;
1035 snd_pcm_period_elapsed(subs);
1040 /* disconnect the host, SIZE_HBUF command always switches to the stream mode */
1041 vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
1046 * vx_pcm_capture_pointer - pointer callback for capture
1048 static snd_pcm_uframes_t vx_pcm_capture_pointer(struct snd_pcm_substream *subs)
1050 struct snd_pcm_runtime *runtime = subs->runtime;
1051 struct vx_pipe *pipe = runtime->private_data;
1052 return bytes_to_frames(runtime, pipe->hw_ptr);
1056 * operators for PCM capture
1058 static const struct snd_pcm_ops vx_pcm_capture_ops = {
1059 .open = vx_pcm_capture_open,
1060 .close = vx_pcm_capture_close,
1061 .prepare = vx_pcm_prepare,
1062 .trigger = vx_pcm_trigger,
1063 .pointer = vx_pcm_capture_pointer,
1068 * interrupt handler for pcm streams
1070 void vx_pcm_update_intr(struct vx_core *chip, unsigned int events)
1073 struct vx_pipe *pipe;
1075 #define EVENT_MASK (END_OF_BUFFER_EVENTS_PENDING|ASYNC_EVENTS_PENDING)
1077 if (events & EVENT_MASK) {
1078 vx_init_rmh(&chip->irq_rmh, CMD_ASYNC);
1079 if (events & ASYNC_EVENTS_PENDING)
1080 chip->irq_rmh.Cmd[0] |= 0x00000001; /* SEL_ASYNC_EVENTS */
1081 if (events & END_OF_BUFFER_EVENTS_PENDING)
1082 chip->irq_rmh.Cmd[0] |= 0x00000002; /* SEL_END_OF_BUF_EVENTS */
1084 if (vx_send_msg(chip, &chip->irq_rmh) < 0) {
1085 snd_printdd(KERN_ERR "msg send error!!\n");
1090 while (i < chip->irq_rmh.LgStat) {
1091 int p, buf, capture, eob;
1092 p = chip->irq_rmh.Stat[i] & MASK_FIRST_FIELD;
1093 capture = (chip->irq_rmh.Stat[i] & 0x400000) ? 1 : 0;
1094 eob = (chip->irq_rmh.Stat[i] & 0x800000) ? 1 : 0;
1096 if (events & ASYNC_EVENTS_PENDING)
1098 buf = 1; /* force to transfer */
1099 if (events & END_OF_BUFFER_EVENTS_PENDING) {
1101 buf = chip->irq_rmh.Stat[i];
1106 if (snd_BUG_ON(p < 0 || p >= chip->audio_outs))
1108 pipe = chip->playback_pipes[p];
1109 if (pipe && pipe->substream) {
1110 vx_pcm_playback_update(chip, pipe->substream, pipe);
1111 vx_pcm_playback_transfer(chip, pipe->substream, pipe, buf);
1116 /* update the capture pcm pointers as frequently as possible */
1117 for (i = 0; i < chip->audio_ins; i++) {
1118 pipe = chip->capture_pipes[i];
1119 if (pipe && pipe->substream)
1120 vx_pcm_capture_update(chip, pipe->substream, pipe);
1126 * vx_init_audio_io - check the available audio i/o and allocate pipe arrays
1128 static int vx_init_audio_io(struct vx_core *chip)
1133 vx_init_rmh(&rmh, CMD_SUPPORTED);
1134 if (vx_send_msg(chip, &rmh) < 0) {
1135 snd_printk(KERN_ERR "vx: cannot get the supported audio data\n");
1139 chip->audio_outs = rmh.Stat[0] & MASK_FIRST_FIELD;
1140 chip->audio_ins = (rmh.Stat[0] >> (FIELD_SIZE*2)) & MASK_FIRST_FIELD;
1141 chip->audio_info = rmh.Stat[1];
1143 /* allocate pipes */
1144 chip->playback_pipes = kcalloc(chip->audio_outs, sizeof(struct vx_pipe *), GFP_KERNEL);
1145 if (!chip->playback_pipes)
1147 chip->capture_pipes = kcalloc(chip->audio_ins, sizeof(struct vx_pipe *), GFP_KERNEL);
1148 if (!chip->capture_pipes) {
1149 kfree(chip->playback_pipes);
1153 preferred = chip->ibl.size;
1155 vx_set_ibl(chip, &chip->ibl); /* query the info */
1156 if (preferred > 0) {
1157 chip->ibl.size = ((preferred + chip->ibl.granularity - 1) /
1158 chip->ibl.granularity) * chip->ibl.granularity;
1159 if (chip->ibl.size > chip->ibl.max_size)
1160 chip->ibl.size = chip->ibl.max_size;
1162 chip->ibl.size = chip->ibl.min_size; /* set to the minimum */
1163 vx_set_ibl(chip, &chip->ibl);
1170 * free callback for pcm
1172 static void snd_vx_pcm_free(struct snd_pcm *pcm)
1174 struct vx_core *chip = pcm->private_data;
1175 chip->pcm[pcm->device] = NULL;
1176 kfree(chip->playback_pipes);
1177 chip->playback_pipes = NULL;
1178 kfree(chip->capture_pipes);
1179 chip->capture_pipes = NULL;
1183 * snd_vx_pcm_new - create and initialize a pcm
1185 int snd_vx_pcm_new(struct vx_core *chip)
1187 struct snd_pcm *pcm;
1191 if ((err = vx_init_audio_io(chip)) < 0)
1194 for (i = 0; i < chip->hw->num_codecs; i++) {
1195 unsigned int outs, ins;
1196 outs = chip->audio_outs > i * 2 ? 1 : 0;
1197 ins = chip->audio_ins > i * 2 ? 1 : 0;
1198 if (! outs && ! ins)
1200 err = snd_pcm_new(chip->card, "VX PCM", i,
1205 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops);
1207 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops);
1208 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
1209 snd_dma_continuous_data(GFP_KERNEL | GFP_DMA32),
1212 pcm->private_data = chip;
1213 pcm->private_free = snd_vx_pcm_free;
1214 pcm->info_flags = 0;
1215 pcm->nonatomic = true;
1216 strcpy(pcm->name, chip->card->shortname);