/* CAUTION: call it with irq disabled (due to internal call to snd_pcm_update_hw_ptr) */
static inline snd_pcm_uframes_t _ksnd_pcm_avail_update(snd_pcm_substream_t
*substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
/*NICK added if to remove real updates which we do not want*/
#if defined(__TDT__) \
&& (defined(FORTIS_HDBOX) \
|| defined(UFS922) \
|| defined(UFC960) \
|| defined(HL101) \
|| defined(VIP1_V2) \
|| defined(VIP2_V1) \
|| defined(OCTAGON1008) \
|| defined(IPBOX9900) \
|| defined(IPBOX99) \
|| defined(IPBOX55) \
|| defined(CUBEREVO_250HD) \
|| defined(CUBEREVO))
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
if (runtime->sleep_min == 0 &&
_ksnd_pcm_state(substream) == SNDRV_PCM_STATE_RUNNING)
snd_pcm_update_hw_ptr(substream);
#else
if (_ksnd_pcm_state(substream) == SNDRV_PCM_STATE_RUNNING)
snd_pcm_update_hw_ptr(substream);
#endif
#endif
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return snd_pcm_playback_avail(runtime);
else
return snd_pcm_capture_avail(runtime);
}
snd_pcm_sframes_t ksnd_pcm_mmap_commit(ksnd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t frames)
{
snd_pcm_substream_t *substream = pcm->substream;
snd_pcm_runtime_t *runtime = substream->runtime;
snd_pcm_uframes_t appl_ptr;
snd_pcm_sframes_t res = frames;
int err;
if (snd_BUG_ON(!substream))
return -EFAULT;
/* for SPDIF we need to run though the just committed PCM samples and
* add formating (unless raw mode is enabled)
*/
// BUG_ON(substream->pcm->card->number == 2); /* TODO: magic number */
snd_pcm_stream_lock_irq(substream);
switch (_ksnd_pcm_state(substream))
{
case SNDRV_PCM_STATE_XRUN:
res = -EPIPE;
goto _end_unlock;
case SNDRV_PCM_STATE_SUSPENDED:
res = -ESTRPIPE;
goto _end_unlock;
}
appl_ptr = runtime->control->appl_ptr;
/* verify no-one is interleaving access to the playback */
// TODO: what about capture?
BUG_ON(substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
(appl_ptr % runtime->buffer_size) != offset);
appl_ptr += frames;
if (appl_ptr >= runtime->boundary)
appl_ptr = 0;
err = _ksnd_pcm_update_appl_ptr(substream, appl_ptr);
if (err < 0)
res = err;
_end_unlock:
snd_pcm_stream_unlock_irq(substream);
return res;
}
static int _ksnd_pcm_wait(snd_pcm_substream_t *substream, int timeout)
{
snd_pcm_runtime_t *runtime = substream->runtime;
snd_pcm_uframes_t avail;
int res = 1; /* success is a positive integer */
snd_pcm_stream_lock_irq(substream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
if (avail < runtime->control->avail_min)
{
wait_queue_t wait;
long jiffies;
if (timeout >= 0)
jiffies = (timeout * HZ) / 1000;
else
jiffies = 10 * HZ;
init_waitqueue_entry(&wait, current);
add_wait_queue(&runtime->sleep, &wait);
do
{
if (signal_pending(current))
{
res = -ERESTARTSYS;
break;
}
set_current_state(TASK_INTERRUPTIBLE);
snd_pcm_stream_unlock_irq(substream);
jiffies = schedule_timeout(jiffies);
snd_pcm_stream_lock_irq(substream);
if (jiffies == 0)
{
if (timeout < 0)
{
snd_printd("ksnd: [hw:%d,%d] playback write error "
"(DMA or IRQ trouble?)\n",
substream->pcm->card->number,
substream->pcm->device);
jiffies = 10 * HZ;
}
else
{
res = 0; /* timeout */
}
}
switch (_ksnd_pcm_state(substream))
{
case SNDRV_PCM_STATE_SETUP:
case SNDRV_PCM_STATE_XRUN:
case SNDRV_PCM_STATE_DRAINING:
res = -EPIPE;
break;
case SNDRV_PCM_STATE_SUSPENDED:
printk("%s: result ESTRPIPE %d\n",
__FUNCTION__, __LINE__);
res = -ESTRPIPE;
break;
case SNDRV_PCM_STATE_PAUSED:
printk("%s: Waiting for buffer %d\n",
__FUNCTION__, __LINE__);
break;
default:
break;
}
if (1 != res)
break;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
}
while (avail < runtime->control->avail_min);
remove_wait_queue(&runtime->sleep, &wait);
}
snd_pcm_stream_unlock_irq(substream);
return res;
}
snd_pcm_state_t ksnd_pcm_state(ksnd_pcm_t *pcm)
{
return _ksnd_pcm_state(pcm->substream);
}
static int _ksnd_pcm_writei1(snd_pcm_substream_t *substream,
unsigned long data,
snd_pcm_uframes_t size,
int srcchannels, transfer_f transfer)
{
snd_pcm_runtime_t *runtime = substream->runtime;
snd_pcm_uframes_t xfer = 0;
snd_pcm_uframes_t offset = 0;
int err = 0;
if (size == 0)
return 0;
snd_pcm_stream_lock_irq(substream);
switch (_ksnd_pcm_state(substream))
{
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_RUNNING:
case SNDRV_PCM_STATE_PAUSED:
break;
case SNDRV_PCM_STATE_XRUN:
err = -EPIPE;
goto _end_unlock;
case SNDRV_PCM_STATE_SUSPENDED:
err = -ESTRPIPE;
goto _end_unlock;
default:
err = -EBADFD;
goto _end_unlock;
}
while (size > 0)
{
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
snd_pcm_uframes_t avail;
snd_pcm_uframes_t cont;
avail = _ksnd_pcm_avail_update(substream);
#if defined(__TDT__) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30))
// attribute xfer_align is not used any more
/* #warning Do we have to check the values 'size' and 'avail'? */
if ((avail < runtime->control->avail_min) && (size > avail))
{
#else
if (((avail < runtime->control->avail_min && size > avail) ||
(size >= runtime->xfer_align
&& avail < runtime->xfer_align)))
{
#endif
int res;
snd_pcm_stream_unlock_irq(substream);
do
{
res = _ksnd_pcm_wait(substream, 10000);
}
while (res == 0 &&
_ksnd_pcm_state(substream) !=
SNDRV_PCM_STATE_PREPARED
&& _ksnd_pcm_state(substream) !=
SNDRV_PCM_STATE_PAUSED);
snd_pcm_stream_lock_irq(substream);
if (res == 0) /* timeout */
{
if (_ksnd_pcm_state(substream) ==
SNDRV_PCM_STATE_SUSPENDED)
{
err = -ESTRPIPE;
goto _end_unlock;
}
else
{
snd_printd("playback write error "
"(DMA or IRQ trouble?)\n");
err = -EIO;
goto _end_unlock;
}
}
else if (res < 0) /* error */
{
err = res;
goto _end_unlock;
}
avail = snd_pcm_playback_avail(runtime);
}
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
frames = cont;
if (snd_BUG_ON(!frames))
{
snd_pcm_stream_unlock_irq(substream);
return -EINVAL;
}
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
err = transfer(substream, appl_ofs, data, offset, frames, srcchannels);
snd_pcm_stream_lock_irq(substream);
if (err < 0)
goto _end;
switch (_ksnd_pcm_state(substream))
{
case SNDRV_PCM_STATE_XRUN:
err = -EPIPE;
goto _end_unlock;
case SNDRV_PCM_STATE_SUSPENDED:
err = -ESTRPIPE;
goto _end_unlock;
default:
break;
}
appl_ptr += frames;
if (appl_ptr >= runtime->boundary)
{
runtime->control->appl_ptr = 0;
}
else
{
runtime->control->appl_ptr = appl_ptr;
}
if (substream->ops->ack)
substream->ops->ack(substream);
offset += frames;
size -= frames;
xfer += frames;
if (_ksnd_pcm_state(substream) == SNDRV_PCM_STATE_PREPARED &&
snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t) runtime->start_threshold)
{
err = snd_pcm_start(substream);
if (err < 0)
goto _end_unlock;
}
}
_end_unlock:
snd_pcm_stream_unlock_irq(substream);
_end:
return xfer > 0 ? (snd_pcm_sframes_t) xfer : err;
}
int ksnd_pcm_writei(ksnd_pcm_t *kpcm,
int *data, unsigned int size, unsigned int srcchannels)
{
snd_pcm_substream_t *substream = kpcm->substream;
snd_pcm_runtime_t *runtime;
int err;
transfer_f out_func = 0;
runtime = substream->runtime;
if (substream->pcm->card->number == 2)
{
out_func = _ksnd_pcm_IEC60958_transfer;
}
else
{
out_func = _ksnd_pcm_write_transfer;
}
if (_ksnd_pcm_state(substream) == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED
&& runtime->channels > 1)
return -EINVAL;
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -EINVAL;
if (size == 0)
return 0;
do
{
err =
_ksnd_pcm_writei1(substream, (unsigned long)data, size,
srcchannels, out_func);
if (err < 0)
{
if (err == -EAGAIN)
{
continue;
}
if (err == -EPIPE)
{
printk("ALSA Aud underrun for hw:%d,%d\n",
substream->pcm->card->number,
substream->pcm->device);
if ((err = ksnd_pcm_prepare(kpcm)) < 0)
return err;
continue;
}
return err;
}
else
{
data += samples_to_bytes(runtime, err * srcchannels);
size -= err;
}
}
while (size > 0);
return 0;
}