static void au1000_dma_start(struct audio_stream *stream)
{
if (!stream->buffer)
return;
init_dma(stream->dma);
if (get_dma_active_buffer(stream->dma) == 0) {
clear_dma_done0(stream->dma);
set_dma_addr0(stream->dma, stream->buffer->start);
set_dma_count0(stream->dma, stream->period_size >> 1);
set_dma_addr1(stream->dma, stream->buffer->next->start);
set_dma_count1(stream->dma, stream->period_size >> 1);
} else {
static void
au1000_dma_start(audio_stream_t *stream)
{
snd_pcm_substream_t *substream = stream->substream;
snd_pcm_runtime_t *runtime = substream->runtime;
unsigned long flags, dma_start;
int i;
au1000_period_t * pointer;
if (stream->buffer == NULL) {
dma_start = virt_to_phys(runtime->dma_area);
stream->period_size = frames_to_bytes(runtime,
runtime->period_size);
stream->buffer = kmalloc(sizeof(au1000_period_t), GFP_KERNEL);
pointer = stream->buffer;
for (i = 0 ; i < runtime->periods ; i++) {
pointer->start = (u32)(dma_start +
(i * stream->period_size));
pointer->relative_end = (u32)
(((i+1) * stream->period_size) - 0x1);
if ( i < runtime->periods - 1) {
pointer->next = kmalloc(sizeof(au1000_period_t)
, GFP_KERNEL);
pointer = pointer->next;
}
}
pointer->next = stream->buffer;
spin_lock_irqsave(&stream->dma_lock, flags);
init_dma(stream->dma);
if (get_dma_active_buffer(stream->dma) == 0) {
clear_dma_done0(stream->dma);
set_dma_addr0(stream->dma, stream->buffer->start);
set_dma_count0(stream->dma, stream->period_size >> 1);
set_dma_addr1(stream->dma, stream->buffer->next->start);
set_dma_count1(stream->dma, stream->period_size >> 1);
} else {
