static void audio_clear_buf(audio_stream_t * s)
{
DPRINTK("audio_clear_buf\n");
/* ensure DMA won't run anymore */
s->active = 0;
s->stopped = 0;
sa1100_dma_flush_all(s->dma_ch);
if (s->buffers) {
int frag;
for (frag = 0; frag < s->nbfrags; frag++) {
if (!s->buffers[frag].master)
continue;
consistent_free(s->buffers[frag].start,
s->buffers[frag].master,
s->buffers[frag].dma_addr);
}
kfree(s->buffers);
s->buffers = NULL;
}
s->buf_idx = 0;
s->buf = NULL;
}
static void audio_reset_buf(audio_stream_t * s)
{
int frag;
s->active = 0;
s->stopped = 0;
sa1100_dma_flush_all(s->dma_ch);
if (s->buffers) {
for (frag = 0; frag < s->nbfrags; frag++) {
audio_buf_t *b = &s->buffers[frag];
b->size = 0;
sema_init(&b->sem, 1);
}
}
s->bytecount = 0;
s->fragcount = 0;
}
/*
* We want to get here as soon as possible, and get the receiver setup.
* We use the existing buffer.
*/
static void sa1100_irda_rx_dma_start(struct sa1100_irda *si)
{
if (!si->rxskb) {
printk(KERN_ERR "sa1100_ir: rx buffer went missing\n");
return;
}
/*
* First empty receive FIFO
*/
Ser2HSCR0 = si->hscr0 | HSCR0_HSSP;
/*
* Enable the DMA, receiver and recieve interrupt.
*/
sa1100_dma_flush_all(si->rxdma);
sa1100_dma_queue_buffer(si->rxdma, NULL, si->rxbuf_dma, HPSIR_MAX_RXLEN);
Ser2HSCR0 = si->hscr0 | HSCR0_HSSP | HSCR0_RXE;
}