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; }