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DEFINITIONS
This source file includes following definitions.
- snd_pcm_get_vmalloc_page
- snd_pcm_alloc_vmalloc_buffer
- snd_pcm_free_vmalloc_buffer
- vx_pcm_read_per_bytes
- vx_set_pcx_time
- vx_set_differed_time
- vx_set_stream_format
- vx_set_format
- vx_set_ibl
- vx_get_pipe_state
- vx_query_hbuffer_size
- vx_pipe_can_start
- vx_conf_pipe
- vx_send_irqa
- vx_toggle_pipe
- vx_stop_pipe
- vx_alloc_pipe
- vx_free_pipe
- vx_start_stream
- vx_stop_stream
- vx_pcm_playback_open
- vx_pcm_playback_close
- vx_notify_end_of_buffer
- vx_pcm_playback_transfer_chunk
- vx_update_pipe_position
- vx_pcm_playback_transfer
- vx_pcm_playback_update
- vx_pcm_delayed_start
- vx_pcm_trigger
- vx_pcm_playback_pointer
- vx_pcm_hw_params
- vx_pcm_hw_free
- vx_pcm_prepare
- vx_pcm_capture_open
- vx_pcm_capture_close
- vx_pcm_capture_update
- vx_pcm_capture_pointer
- vx_pcm_update_intr
- vx_init_audio_io
- snd_vx_pcm_free
- snd_vx_pcm_new
/*
* Driver for Digigram VX soundcards
*
* PCM part
*
* Copyright (c) 2002,2003 by Takashi Iwai <tiwai@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* STRATEGY
* for playback, we send series of "chunks", which size is equal with the
* IBL size, typically 126 samples. at each end of chunk, the end-of-buffer
* interrupt is notified, and the interrupt handler will feed the next chunk.
*
* the current position is calculated from the sample count RMH.
* pipe->transferred is the counter of data which has been already transferred.
* if this counter reaches to the period size, snd_pcm_period_elapsed() will
* be issued.
*
* for capture, the situation is much easier.
* to get a low latency response, we'll check the capture streams at each
* interrupt (capture stream has no EOB notification). if the pending
* data is accumulated to the period size, snd_pcm_period_elapsed() is
* called and the pointer is updated.
*
* the current point of read buffer is kept in pipe->hw_ptr. note that
* this is in bytes.
*
*
* TODO
* - linked trigger for full-duplex mode.
* - scheduled action on the stream.
*/
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/asoundef.h>
#include <sound/pcm.h>
#include <sound/vx_core.h>
#include "vx_cmd.h"
/*
* we use a vmalloc'ed (sg-)buffer
*/
/* get the physical page pointer on the given offset */
static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
unsigned long offset)
{
void *pageptr = subs->runtime->dma_area + offset;
return vmalloc_to_page(pageptr);
}
/*
* allocate a buffer via vmalloc_32().
* called from hw_params
* NOTE: this may be called not only once per pcm open!
*/
static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
{
struct snd_pcm_runtime *runtime = subs->runtime;
if (runtime->dma_area) {
/* already allocated */
if (runtime->dma_bytes >= size)
return 0; /* already enough large */
vfree(runtime->dma_area);
}
runtime->dma_area = vmalloc_32(size);
if (! runtime->dma_area)
return -ENOMEM;
memset(runtime->dma_area, 0, size);
runtime->dma_bytes = size;
return 1; /* changed */
}
/*
* free the buffer.
* called from hw_free callback
* NOTE: this may be called not only once per pcm open!
*/
static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
vfree(runtime->dma_area);
runtime->dma_area = NULL;
return 0;
}
/*
* read three pending pcm bytes via inb()
*/
static void vx_pcm_read_per_bytes(struct vx_core *chip, struct snd_pcm_runtime *runtime,
struct vx_pipe *pipe)
{
int offset = pipe->hw_ptr;
unsigned char *buf = (unsigned char *)(runtime->dma_area + offset);
*buf++ = vx_inb(chip, RXH);
if (++offset >= pipe->buffer_bytes) {
offset = 0;
buf = (unsigned char *)runtime->dma_area;
}
*buf++ = vx_inb(chip, RXM);
if (++offset >= pipe->buffer_bytes) {
offset = 0;
buf = (unsigned char *)runtime->dma_area;
}
*buf++ = vx_inb(chip, RXL);
if (++offset >= pipe->buffer_bytes) {
offset = 0;
buf = (unsigned char *)runtime->dma_area;
}
pipe->hw_ptr = offset;
}
/*
* vx_set_pcx_time - convert from the PC time to the RMH status time.
* @pc_time: the pointer for the PC-time to set
* @dsp_time: the pointer for RMH status time array
*/
static void vx_set_pcx_time(struct vx_core *chip, pcx_time_t *pc_time,
unsigned int *dsp_time)
{
dsp_time[0] = (unsigned int)((*pc_time) >> 24) & PCX_TIME_HI_MASK;
dsp_time[1] = (unsigned int)(*pc_time) & MASK_DSP_WORD;
}
/*
* vx_set_differed_time - set the differed time if specified
* @rmh: the rmh record to modify
* @pipe: the pipe to be checked
*
* if the pipe is programmed with the differed time, set the DSP time
* on the rmh and changes its command length.
*
* returns the increase of the command length.
*/
static int vx_set_differed_time(struct vx_core *chip, struct vx_rmh *rmh,
struct vx_pipe *pipe)
{
/* Update The length added to the RMH command by the timestamp */
if (! (pipe->differed_type & DC_DIFFERED_DELAY))
return 0;
/* Set the T bit */
rmh->Cmd[0] |= DSP_DIFFERED_COMMAND_MASK;
/* Time stamp is the 1st following parameter */
vx_set_pcx_time(chip, &pipe->pcx_time, &rmh->Cmd[1]);
/* Add the flags to a notified differed command */
if (pipe->differed_type & DC_NOTIFY_DELAY)
rmh->Cmd[1] |= NOTIFY_MASK_TIME_HIGH ;
/* Add the flags to a multiple differed command */
if (pipe->differed_type & DC_MULTIPLE_DELAY)
rmh->Cmd[1] |= MULTIPLE_MASK_TIME_HIGH;
/* Add the flags to a stream-time differed command */
if (pipe->differed_type & DC_STREAM_TIME_DELAY)
rmh->Cmd[1] |= STREAM_MASK_TIME_HIGH;
rmh->LgCmd += 2;
return 2;
}
/*
* vx_set_stream_format - send the stream format command
* @pipe: the affected pipe
* @data: format bitmask
*/
static int vx_set_stream_format(struct vx_core *chip, struct vx_pipe *pipe,
unsigned int data)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, pipe->is_capture ?
CMD_FORMAT_STREAM_IN : CMD_FORMAT_STREAM_OUT);
rmh.Cmd[0] |= pipe->number << FIELD_SIZE;
/* Command might be longer since we may have to add a timestamp */
vx_set_differed_time(chip, &rmh, pipe);
rmh.Cmd[rmh.LgCmd] = (data & 0xFFFFFF00) >> 8;
rmh.Cmd[rmh.LgCmd + 1] = (data & 0xFF) << 16 /*| (datal & 0xFFFF00) >> 8*/;
rmh.LgCmd += 2;
return vx_send_msg(chip, &rmh);
}
/*
* vx_set_format - set the format of a pipe
* @pipe: the affected pipe
* @runtime: pcm runtime instance to be referred
*
* returns 0 if successful, or a negative error code.
*/
static int vx_set_format(struct vx_core *chip, struct vx_pipe *pipe,
struct snd_pcm_runtime *runtime)
{
unsigned int header = HEADER_FMT_BASE;
if (runtime->channels == 1)
header |= HEADER_FMT_MONO;
if (snd_pcm_format_little_endian(runtime->format))
header |= HEADER_FMT_INTEL;
if (runtime->rate < 32000 && runtime->rate > 11025)
header |= HEADER_FMT_UPTO32;
else if (runtime->rate <= 11025)
header |= HEADER_FMT_UPTO11;
switch (snd_pcm_format_physical_width(runtime->format)) {
// case 8: break;
case 16: header |= HEADER_FMT_16BITS; break;
case 24: header |= HEADER_FMT_24BITS; break;
default :
snd_BUG();
return -EINVAL;
};
return vx_set_stream_format(chip, pipe, header);
}
/*
* set / query the IBL size
*/
static int vx_set_ibl(struct vx_core *chip, struct vx_ibl_info *info)
{
int err;
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_IBL);
rmh.Cmd[0] |= info->size & 0x03ffff;
err = vx_send_msg(chip, &rmh);
if (err < 0)
return err;
info->size = rmh.Stat[0];
info->max_size = rmh.Stat[1];
info->min_size = rmh.Stat[2];
info->granularity = rmh.Stat[3];
snd_printdd(KERN_DEBUG "vx_set_ibl: size = %d, max = %d, min = %d, gran = %d\n",
info->size, info->max_size, info->min_size, info->granularity);
return 0;
}
/*
* vx_get_pipe_state - get the state of a pipe
* @pipe: the pipe to be checked
* @state: the pointer for the returned state
*
* checks the state of a given pipe, and stores the state (1 = running,
* 0 = paused) on the given pointer.
*
* called from trigger callback only
*/
static int vx_get_pipe_state(struct vx_core *chip, struct vx_pipe *pipe, int *state)
{
int err;
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_PIPE_STATE);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
if (! err)
*state = (rmh.Stat[0] & (1 << pipe->number)) ? 1 : 0;
return err;
}
/*
* vx_query_hbuffer_size - query available h-buffer size in bytes
* @pipe: the pipe to be checked
*
* return the available size on h-buffer in bytes,
* or a negative error code.
*
* NOTE: calling this function always switches to the stream mode.
* you'll need to disconnect the host to get back to the
* normal mode.
*/
static int vx_query_hbuffer_size(struct vx_core *chip, struct vx_pipe *pipe)
{
int result;
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_SIZE_HBUFFER);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
if (pipe->is_capture)
rmh.Cmd[0] |= 0x00000001;
result = vx_send_msg(chip, &rmh);
if (! result)
result = rmh.Stat[0] & 0xffff;
return result;
}
/*
* vx_pipe_can_start - query whether a pipe is ready for start
* @pipe: the pipe to be checked
*
* return 1 if ready, 0 if not ready, and negative value on error.
*
* called from trigger callback only
*/
static int vx_pipe_can_start(struct vx_core *chip, struct vx_pipe *pipe)
{
int err;
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_CAN_START_PIPE);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
rmh.Cmd[0] |= 1;
err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
if (! err) {
if (rmh.Stat[0])
err = 1;
}
return err;
}
/*
* vx_conf_pipe - tell the pipe to stand by and wait for IRQA.
* @pipe: the pipe to be configured
*/
static int vx_conf_pipe(struct vx_core *chip, struct vx_pipe *pipe)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_CONF_PIPE);
if (pipe->is_capture)
rmh.Cmd[0] |= COMMAND_RECORD_MASK;
rmh.Cmd[1] = 1 << pipe->number;
return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
}
/*
* vx_send_irqa - trigger IRQA
*/
static int vx_send_irqa(struct vx_core *chip)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_SEND_IRQA);
return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
}
#define MAX_WAIT_FOR_DSP 250
/*
* vx boards do not support inter-card sync, besides
* only 126 samples require to be prepared before a pipe can start
*/
#define CAN_START_DELAY 2 /* wait 2ms only before asking if the pipe is ready*/
#define WAIT_STATE_DELAY 2 /* wait 2ms after irqA was requested and check if the pipe state toggled*/
/*
* vx_toggle_pipe - start / pause a pipe
* @pipe: the pipe to be triggered
* @state: start = 1, pause = 0
*
* called from trigger callback only
*
*/
static int vx_toggle_pipe(struct vx_core *chip, struct vx_pipe *pipe, int state)
{
int err, i, cur_state;
/* Check the pipe is not already in the requested state */
if (vx_get_pipe_state(chip, pipe, &cur_state) < 0)
return -EBADFD;
if (state == cur_state)
return 0;
/* If a start is requested, ask the DSP to get prepared
* and wait for a positive acknowledge (when there are
* enough sound buffer for this pipe)
*/
if (state) {
for (i = 0 ; i < MAX_WAIT_FOR_DSP; i++) {
err = vx_pipe_can_start(chip, pipe);
if (err > 0)
break;
/* Wait for a few, before asking again
* to avoid flooding the DSP with our requests
*/
mdelay(1);
}
}
if ((err = vx_conf_pipe(chip, pipe)) < 0)
return err;
if ((err = vx_send_irqa(chip)) < 0)
return err;
/* If it completes successfully, wait for the pipes
* reaching the expected state before returning
* Check one pipe only (since they are synchronous)
*/
for (i = 0; i < MAX_WAIT_FOR_DSP; i++) {
err = vx_get_pipe_state(chip, pipe, &cur_state);
if (err < 0 || cur_state == state)
break;
err = -EIO;
mdelay(1);
}
return err < 0 ? -EIO : 0;
}
/*
* vx_stop_pipe - stop a pipe
* @pipe: the pipe to be stopped
*
* called from trigger callback only
*/
static int vx_stop_pipe(struct vx_core *chip, struct vx_pipe *pipe)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_STOP_PIPE);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
}
/*
* vx_alloc_pipe - allocate a pipe and initialize the pipe instance
* @capture: 0 = playback, 1 = capture operation
* @audioid: the audio id to be assigned
* @num_audio: number of audio channels
* @pipep: the returned pipe instance
*
* return 0 on success, or a negative error code.
*/
static int vx_alloc_pipe(struct vx_core *chip, int capture,
int audioid, int num_audio,
struct vx_pipe **pipep)
{
int err;
struct vx_pipe *pipe;
struct vx_rmh rmh;
int data_mode;
*pipep = NULL;
vx_init_rmh(&rmh, CMD_RES_PIPE);
vx_set_pipe_cmd_params(&rmh, capture, audioid, num_audio);
#if 0 // NYI
if (underrun_skip_sound)
rmh.Cmd[0] |= BIT_SKIP_SOUND;
#endif // NYI
data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
if (! capture && data_mode)
rmh.Cmd[0] |= BIT_DATA_MODE;
err = vx_send_msg(chip, &rmh);
if (err < 0)
return err;
/* initialize the pipe record */
pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
if (! pipe) {
/* release the pipe */
vx_init_rmh(&rmh, CMD_FREE_PIPE);
vx_set_pipe_cmd_params(&rmh, capture, audioid, 0);
vx_send_msg(chip, &rmh);
return -ENOMEM;
}
/* the pipe index should be identical with the audio index */
pipe->number = audioid;
pipe->is_capture = capture;
pipe->channels = num_audio;
pipe->differed_type = 0;
pipe->pcx_time = 0;
pipe->data_mode = data_mode;
*pipep = pipe;
return 0;
}
/*
* vx_free_pipe - release a pipe
* @pipe: pipe to be released
*/
static int vx_free_pipe(struct vx_core *chip, struct vx_pipe *pipe)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_FREE_PIPE);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
vx_send_msg(chip, &rmh);
kfree(pipe);
return 0;
}
/*
* vx_start_stream - start the stream
*
* called from trigger callback only
*/
static int vx_start_stream(struct vx_core *chip, struct vx_pipe *pipe)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_START_ONE_STREAM);
vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
vx_set_differed_time(chip, &rmh, pipe);
return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
}
/*
* vx_stop_stream - stop the stream
*
* called from trigger callback only
*/
static int vx_stop_stream(struct vx_core *chip, struct vx_pipe *pipe)
{
struct vx_rmh rmh;
vx_init_rmh(&rmh, CMD_STOP_STREAM);
vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number);
return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */
}
/*
* playback hw information
*/
static struct snd_pcm_hardware vx_pcm_playback_hw = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
/*SNDRV_PCM_INFO_RESUME*/),
.formats = (/*SNDRV_PCM_FMTBIT_U8 |*/
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 5000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (128*1024),
.period_bytes_min = 126,
.period_bytes_max = (128*1024),
.periods_min = 2,
.periods_max = VX_MAX_PERIODS,
.fifo_size = 126,
};
static void vx_pcm_delayed_start(unsigned long arg);
/*
* vx_pcm_playback_open - open callback for playback
*/
static int vx_pcm_playback_open(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct vx_pipe *pipe = NULL;
unsigned int audio;
int err;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
audio = subs->pcm->device * 2;
if (snd_BUG_ON(audio >= chip->audio_outs))
return -EINVAL;
/* playback pipe may have been already allocated for monitoring */
pipe = chip->playback_pipes[audio];
if (! pipe) {
/* not allocated yet */
err = vx_alloc_pipe(chip, 0, audio, 2, &pipe); /* stereo playback */
if (err < 0)
return err;
chip->playback_pipes[audio] = pipe;
}
/* open for playback */
pipe->references++;
pipe->substream = subs;
tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
chip->playback_pipes[audio] = pipe;
runtime->hw = vx_pcm_playback_hw;
runtime->hw.period_bytes_min = chip->ibl.size;
runtime->private_data = pipe;
/* align to 4 bytes (otherwise will be problematic when 24bit is used) */
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
return 0;
}
/*
* vx_pcm_playback_close - close callback for playback
*/
static int vx_pcm_playback_close(struct snd_pcm_substream *subs)
{
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct vx_pipe *pipe;
if (! subs->runtime->private_data)
return -EINVAL;
pipe = subs->runtime->private_data;
if (--pipe->references == 0) {
chip->playback_pipes[pipe->number] = NULL;
vx_free_pipe(chip, pipe);
}
return 0;
}
/*
* vx_notify_end_of_buffer - send "end-of-buffer" notifier at the given pipe
* @pipe: the pipe to notify
*
* NB: call with a certain lock.
*/
static int vx_notify_end_of_buffer(struct vx_core *chip, struct vx_pipe *pipe)
{
int err;
struct vx_rmh rmh; /* use a temporary rmh here */
/* Toggle Dsp Host Interface into Message mode */
vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
vx_init_rmh(&rmh, CMD_NOTIFY_END_OF_BUFFER);
vx_set_stream_cmd_params(&rmh, 0, pipe->number);
err = vx_send_msg_nolock(chip, &rmh);
if (err < 0)
return err;
/* Toggle Dsp Host Interface back to sound transfer mode */
vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT);
return 0;
}
/*
* vx_pcm_playback_transfer_chunk - transfer a single chunk
* @subs: substream
* @pipe: the pipe to transfer
* @size: chunk size in bytes
*
* transfer a single buffer chunk. EOB notificaton is added after that.
* called from the interrupt handler, too.
*
* return 0 if ok.
*/
static int vx_pcm_playback_transfer_chunk(struct vx_core *chip,
struct snd_pcm_runtime *runtime,
struct vx_pipe *pipe, int size)
{
int space, err = 0;
space = vx_query_hbuffer_size(chip, pipe);
if (space < 0) {
/* disconnect the host, SIZE_HBUF command always switches to the stream mode */
vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
snd_printd("error hbuffer\n");
return space;
}
if (space < size) {
vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT);
snd_printd("no enough hbuffer space %d\n", space);
return -EIO; /* XRUN */
}
/* we don't need irqsave here, because this function
* is called from either trigger callback or irq handler
*/
spin_lock(&chip->lock);
vx_pseudo_dma_write(chip, runtime, pipe, size);
err = vx_notify_end_of_buffer(chip, pipe);
/* disconnect the host, SIZE_HBUF command always switches to the stream mode */
vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
spin_unlock(&chip->lock);
return err;
}
/*
* update the position of the given pipe.
* pipe->position is updated and wrapped within the buffer size.
* pipe->transferred is updated, too, but the size is not wrapped,
* so that the caller can check the total transferred size later
* (to call snd_pcm_period_elapsed).
*/
static int vx_update_pipe_position(struct vx_core *chip,
struct snd_pcm_runtime *runtime,
struct vx_pipe *pipe)
{
struct vx_rmh rmh;
int err, update;
u64 count;
vx_init_rmh(&rmh, CMD_STREAM_SAMPLE_COUNT);
vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0);
err = vx_send_msg(chip, &rmh);
if (err < 0)
return err;
count = ((u64)(rmh.Stat[0] & 0xfffff) << 24) | (u64)rmh.Stat[1];
update = (int)(count - pipe->cur_count);
pipe->cur_count = count;
pipe->position += update;
if (pipe->position >= (int)runtime->buffer_size)
pipe->position %= runtime->buffer_size;
pipe->transferred += update;
return 0;
}
/*
* transfer the pending playback buffer data to DSP
* called from interrupt handler
*/
static void vx_pcm_playback_transfer(struct vx_core *chip,
struct snd_pcm_substream *subs,
struct vx_pipe *pipe, int nchunks)
{
int i, err;
struct snd_pcm_runtime *runtime = subs->runtime;
if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
return;
for (i = 0; i < nchunks; i++) {
if ((err = vx_pcm_playback_transfer_chunk(chip, runtime, pipe,
chip->ibl.size)) < 0)
return;
}
}
/*
* update the playback position and call snd_pcm_period_elapsed() if necessary
* called from interrupt handler
*/
static void vx_pcm_playback_update(struct vx_core *chip,
struct snd_pcm_substream *subs,
struct vx_pipe *pipe)
{
int err;
struct snd_pcm_runtime *runtime = subs->runtime;
if (pipe->running && ! (chip->chip_status & VX_STAT_IS_STALE)) {
if ((err = vx_update_pipe_position(chip, runtime, pipe)) < 0)
return;
if (pipe->transferred >= (int)runtime->period_size) {
pipe->transferred %= runtime->period_size;
snd_pcm_period_elapsed(subs);
}
}
}
/*
* start the stream and pipe.
* this function is called from tasklet, which is invoked by the trigger
* START callback.
*/
static void vx_pcm_delayed_start(unsigned long arg)
{
struct snd_pcm_substream *subs = (struct snd_pcm_substream *)arg;
struct vx_core *chip = subs->pcm->private_data;
struct vx_pipe *pipe = subs->runtime->private_data;
int err;
/* printk( KERN_DEBUG "DDDD tasklet delayed start jiffies = %ld\n", jiffies);*/
if ((err = vx_start_stream(chip, pipe)) < 0) {
snd_printk(KERN_ERR "vx: cannot start stream\n");
return;
}
if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0) {
snd_printk(KERN_ERR "vx: cannot start pipe\n");
return;
}
/* printk( KERN_DEBUG "dddd tasklet delayed start jiffies = %ld \n", jiffies);*/
}
/*
* vx_pcm_playback_trigger - trigger callback for playback
*/
static int vx_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
{
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct vx_pipe *pipe = subs->runtime->private_data;
int err;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
if (! pipe->is_capture)
vx_pcm_playback_transfer(chip, subs, pipe, 2);
/* FIXME:
* we trigger the pipe using tasklet, so that the interrupts are
* issued surely after the trigger is completed.
*/
tasklet_hi_schedule(&pipe->start_tq);
chip->pcm_running++;
pipe->running = 1;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
vx_toggle_pipe(chip, pipe, 0);
vx_stop_pipe(chip, pipe);
vx_stop_stream(chip, pipe);
chip->pcm_running--;
pipe->running = 0;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if ((err = vx_toggle_pipe(chip, pipe, 0)) < 0)
return err;
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0)
return err;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* vx_pcm_playback_pointer - pointer callback for playback
*/
static snd_pcm_uframes_t vx_pcm_playback_pointer(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
struct vx_pipe *pipe = runtime->private_data;
return pipe->position;
}
/*
* vx_pcm_hw_params - hw_params callback for playback and capture
*/
static int vx_pcm_hw_params(struct snd_pcm_substream *subs,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
}
/*
* vx_pcm_hw_free - hw_free callback for playback and capture
*/
static int vx_pcm_hw_free(struct snd_pcm_substream *subs)
{
return snd_pcm_free_vmalloc_buffer(subs);
}
/*
* vx_pcm_prepare - prepare callback for playback and capture
*/
static int vx_pcm_prepare(struct snd_pcm_substream *subs)
{
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct snd_pcm_runtime *runtime = subs->runtime;
struct vx_pipe *pipe = runtime->private_data;
int err, data_mode;
// int max_size, nchunks;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0;
if (data_mode != pipe->data_mode && ! pipe->is_capture) {
/* IEC958 status (raw-mode) was changed */
/* we reopen the pipe */
struct vx_rmh rmh;
snd_printdd(KERN_DEBUG "reopen the pipe with data_mode = %d\n", data_mode);
vx_init_rmh(&rmh, CMD_FREE_PIPE);
vx_set_pipe_cmd_params(&rmh, 0, pipe->number, 0);
if ((err = vx_send_msg(chip, &rmh)) < 0)
return err;
vx_init_rmh(&rmh, CMD_RES_PIPE);
vx_set_pipe_cmd_params(&rmh, 0, pipe->number, pipe->channels);
if (data_mode)
rmh.Cmd[0] |= BIT_DATA_MODE;
if ((err = vx_send_msg(chip, &rmh)) < 0)
return err;
pipe->data_mode = data_mode;
}
if (chip->pcm_running && chip->freq != runtime->rate) {
snd_printk(KERN_ERR "vx: cannot set different clock %d "
"from the current %d\n", runtime->rate, chip->freq);
return -EINVAL;
}
vx_set_clock(chip, runtime->rate);
if ((err = vx_set_format(chip, pipe, runtime)) < 0)
return err;
if (vx_is_pcmcia(chip)) {
pipe->align = 2; /* 16bit word */
} else {
pipe->align = 4; /* 32bit word */
}
pipe->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
pipe->period_bytes = frames_to_bytes(runtime, runtime->period_size);
pipe->hw_ptr = 0;
/* set the timestamp */
vx_update_pipe_position(chip, runtime, pipe);
/* clear again */
pipe->transferred = 0;
pipe->position = 0;
pipe->prepared = 1;
return 0;
}
/*
* operators for PCM playback
*/
static struct snd_pcm_ops vx_pcm_playback_ops = {
.open = vx_pcm_playback_open,
.close = vx_pcm_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = vx_pcm_hw_params,
.hw_free = vx_pcm_hw_free,
.prepare = vx_pcm_prepare,
.trigger = vx_pcm_trigger,
.pointer = vx_pcm_playback_pointer,
.page = snd_pcm_get_vmalloc_page,
};
/*
* playback hw information
*/
static struct snd_pcm_hardware vx_pcm_capture_hw = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID /*|*/
/*SNDRV_PCM_INFO_RESUME*/),
.formats = (/*SNDRV_PCM_FMTBIT_U8 |*/
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE),
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 5000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (128*1024),
.period_bytes_min = 126,
.period_bytes_max = (128*1024),
.periods_min = 2,
.periods_max = VX_MAX_PERIODS,
.fifo_size = 126,
};
/*
* vx_pcm_capture_open - open callback for capture
*/
static int vx_pcm_capture_open(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct vx_pipe *pipe;
struct vx_pipe *pipe_out_monitoring = NULL;
unsigned int audio;
int err;
if (chip->chip_status & VX_STAT_IS_STALE)
return -EBUSY;
audio = subs->pcm->device * 2;
if (snd_BUG_ON(audio >= chip->audio_ins))
return -EINVAL;
err = vx_alloc_pipe(chip, 1, audio, 2, &pipe);
if (err < 0)
return err;
pipe->substream = subs;
tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs);
chip->capture_pipes[audio] = pipe;
/* check if monitoring is needed */
if (chip->audio_monitor_active[audio]) {
pipe_out_monitoring = chip->playback_pipes[audio];
if (! pipe_out_monitoring) {
/* allocate a pipe */
err = vx_alloc_pipe(chip, 0, audio, 2, &pipe_out_monitoring);
if (err < 0)
return err;
chip->playback_pipes[audio] = pipe_out_monitoring;
}
pipe_out_monitoring->references++;
/*
if an output pipe is available, it's audios still may need to be
unmuted. hence we'll have to call a mixer entry point.
*/
vx_set_monitor_level(chip, audio, chip->audio_monitor[audio],
chip->audio_monitor_active[audio]);
/* assuming stereo */
vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1],
chip->audio_monitor_active[audio+1]);
}
pipe->monitoring_pipe = pipe_out_monitoring; /* default value NULL */
runtime->hw = vx_pcm_capture_hw;
runtime->hw.period_bytes_min = chip->ibl.size;
runtime->private_data = pipe;
/* align to 4 bytes (otherwise will be problematic when 24bit is used) */
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
return 0;
}
/*
* vx_pcm_capture_close - close callback for capture
*/
static int vx_pcm_capture_close(struct snd_pcm_substream *subs)
{
struct vx_core *chip = snd_pcm_substream_chip(subs);
struct vx_pipe *pipe;
struct vx_pipe *pipe_out_monitoring;
if (! subs->runtime->private_data)
return -EINVAL;
pipe = subs->runtime->private_data;
chip->capture_pipes[pipe->number] = NULL;
pipe_out_monitoring = pipe->monitoring_pipe;
/*
if an output pipe is attached to this input,
check if it needs to be released.
*/
if (pipe_out_monitoring) {
if (--pipe_out_monitoring->references == 0) {
vx_free_pipe(chip, pipe_out_monitoring);
chip->playback_pipes[pipe->number] = NULL;
pipe->monitoring_pipe = NULL;
}
}
vx_free_pipe(chip, pipe);
return 0;
}
#define DMA_READ_ALIGN 6 /* hardware alignment for read */
/*
* vx_pcm_capture_update - update the capture buffer
*/
static void vx_pcm_capture_update(struct vx_core *chip, struct snd_pcm_substream *subs,
struct vx_pipe *pipe)
{
int size, space, count;
struct snd_pcm_runtime *runtime = subs->runtime;
if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
return;
size = runtime->buffer_size - snd_pcm_capture_avail(runtime);
if (! size)
return;
size = frames_to_bytes(runtime, size);
space = vx_query_hbuffer_size(chip, pipe);
if (space < 0)
goto _error;
if (size > space)
size = space;
size = (size / 3) * 3; /* align to 3 bytes */
if (size < DMA_READ_ALIGN)
goto _error;
/* keep the last 6 bytes, they will be read after disconnection */
count = size - DMA_READ_ALIGN;
/* read bytes until the current pointer reaches to the aligned position
* for word-transfer
*/
while (count > 0) {
if ((pipe->hw_ptr % pipe->align) == 0)
break;
if (vx_wait_for_rx_full(chip) < 0)
goto _error;
vx_pcm_read_per_bytes(chip, runtime, pipe);
count -= 3;
}
if (count > 0) {
/* ok, let's accelerate! */
int align = pipe->align * 3;
space = (count / align) * align;
vx_pseudo_dma_read(chip, runtime, pipe, space);
count -= space;
}
/* read the rest of bytes */
while (count > 0) {
if (vx_wait_for_rx_full(chip) < 0)
goto _error;
vx_pcm_read_per_bytes(chip, runtime, pipe);
count -= 3;
}
/* disconnect the host, SIZE_HBUF command always switches to the stream mode */
vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
/* read the last pending 6 bytes */
count = DMA_READ_ALIGN;
while (count > 0) {
vx_pcm_read_per_bytes(chip, runtime, pipe);
count -= 3;
}
/* update the position */
pipe->transferred += size;
if (pipe->transferred >= pipe->period_bytes) {
pipe->transferred %= pipe->period_bytes;
snd_pcm_period_elapsed(subs);
}
return;
_error:
/* disconnect the host, SIZE_HBUF command always switches to the stream mode */
vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT);
return;
}
/*
* vx_pcm_capture_pointer - pointer callback for capture
*/
static snd_pcm_uframes_t vx_pcm_capture_pointer(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
struct vx_pipe *pipe = runtime->private_data;
return bytes_to_frames(runtime, pipe->hw_ptr);
}
/*
* operators for PCM capture
*/
static struct snd_pcm_ops vx_pcm_capture_ops = {
.open = vx_pcm_capture_open,
.close = vx_pcm_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = vx_pcm_hw_params,
.hw_free = vx_pcm_hw_free,
.prepare = vx_pcm_prepare,
.trigger = vx_pcm_trigger,
.pointer = vx_pcm_capture_pointer,
.page = snd_pcm_get_vmalloc_page,
};
/*
* interrupt handler for pcm streams
*/
void vx_pcm_update_intr(struct vx_core *chip, unsigned int events)
{
unsigned int i;
struct vx_pipe *pipe;
#define EVENT_MASK (END_OF_BUFFER_EVENTS_PENDING|ASYNC_EVENTS_PENDING)
if (events & EVENT_MASK) {
vx_init_rmh(&chip->irq_rmh, CMD_ASYNC);
if (events & ASYNC_EVENTS_PENDING)
chip->irq_rmh.Cmd[0] |= 0x00000001; /* SEL_ASYNC_EVENTS */
if (events & END_OF_BUFFER_EVENTS_PENDING)
chip->irq_rmh.Cmd[0] |= 0x00000002; /* SEL_END_OF_BUF_EVENTS */
if (vx_send_msg(chip, &chip->irq_rmh) < 0) {
snd_printdd(KERN_ERR "msg send error!!\n");
return;
}
i = 1;
while (i < chip->irq_rmh.LgStat) {
int p, buf, capture, eob;
p = chip->irq_rmh.Stat[i] & MASK_FIRST_FIELD;
capture = (chip->irq_rmh.Stat[i] & 0x400000) ? 1 : 0;
eob = (chip->irq_rmh.Stat[i] & 0x800000) ? 1 : 0;
i++;
if (events & ASYNC_EVENTS_PENDING)
i++;
buf = 1; /* force to transfer */
if (events & END_OF_BUFFER_EVENTS_PENDING) {
if (eob)
buf = chip->irq_rmh.Stat[i];
i++;
}
if (capture)
continue;
if (snd_BUG_ON(p < 0 || p >= chip->audio_outs))
continue;
pipe = chip->playback_pipes[p];
if (pipe && pipe->substream) {
vx_pcm_playback_update(chip, pipe->substream, pipe);
vx_pcm_playback_transfer(chip, pipe->substream, pipe, buf);
}
}
}
/* update the capture pcm pointers as frequently as possible */
for (i = 0; i < chip->audio_ins; i++) {
pipe = chip->capture_pipes[i];
if (pipe && pipe->substream)
vx_pcm_capture_update(chip, pipe->substream, pipe);
}
}
/*
* vx_init_audio_io - check the availabe audio i/o and allocate pipe arrays
*/
static int vx_init_audio_io(struct vx_core *chip)
{
struct vx_rmh rmh;
int preferred;
vx_init_rmh(&rmh, CMD_SUPPORTED);
if (vx_send_msg(chip, &rmh) < 0) {
snd_printk(KERN_ERR "vx: cannot get the supported audio data\n");
return -ENXIO;
}
chip->audio_outs = rmh.Stat[0] & MASK_FIRST_FIELD;
chip->audio_ins = (rmh.Stat[0] >> (FIELD_SIZE*2)) & MASK_FIRST_FIELD;
chip->audio_info = rmh.Stat[1];
/* allocate pipes */
chip->playback_pipes = kcalloc(chip->audio_outs, sizeof(struct vx_pipe *), GFP_KERNEL);
if (!chip->playback_pipes)
return -ENOMEM;
chip->capture_pipes = kcalloc(chip->audio_ins, sizeof(struct vx_pipe *), GFP_KERNEL);
if (!chip->capture_pipes) {
kfree(chip->playback_pipes);
return -ENOMEM;
}
preferred = chip->ibl.size;
chip->ibl.size = 0;
vx_set_ibl(chip, &chip->ibl); /* query the info */
if (preferred > 0) {
chip->ibl.size = ((preferred + chip->ibl.granularity - 1) /
chip->ibl.granularity) * chip->ibl.granularity;
if (chip->ibl.size > chip->ibl.max_size)
chip->ibl.size = chip->ibl.max_size;
} else
chip->ibl.size = chip->ibl.min_size; /* set to the minimum */
vx_set_ibl(chip, &chip->ibl);
return 0;
}
/*
* free callback for pcm
*/
static void snd_vx_pcm_free(struct snd_pcm *pcm)
{
struct vx_core *chip = pcm->private_data;
chip->pcm[pcm->device] = NULL;
kfree(chip->playback_pipes);
chip->playback_pipes = NULL;
kfree(chip->capture_pipes);
chip->capture_pipes = NULL;
}
/*
* snd_vx_pcm_new - create and initialize a pcm
*/
int snd_vx_pcm_new(struct vx_core *chip)
{
struct snd_pcm *pcm;
unsigned int i;
int err;
if ((err = vx_init_audio_io(chip)) < 0)
return err;
for (i = 0; i < chip->hw->num_codecs; i++) {
unsigned int outs, ins;
outs = chip->audio_outs > i * 2 ? 1 : 0;
ins = chip->audio_ins > i * 2 ? 1 : 0;
if (! outs && ! ins)
break;
err = snd_pcm_new(chip->card, "VX PCM", i,
outs, ins, &pcm);
if (err < 0)
return err;
if (outs)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops);
if (ins)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops);
pcm->private_data = chip;
pcm->private_free = snd_vx_pcm_free;
pcm->info_flags = 0;
strcpy(pcm->name, chip->card->shortname);
chip->pcm[i] = pcm;
}
return 0;
}