- struct snd_pcm_runtime *runtime = substream->runtime;
- struct omap_runtime_data *prtd = runtime->private_data;
- struct omap_pcm_dma_data *dma_data = prtd->dma_data;
- struct omap_dma_channel_params dma_params;
- int bytes;
-
- /* return if this is a bufferless transfer e.g.
- * codec <--> BT codec or GSM modem -- lg FIXME */
- if (!prtd->dma_data)
- return 0;
-
- memset(&dma_params, 0, sizeof(dma_params));
- dma_params.data_type = dma_data->data_type;
- dma_params.trigger = dma_data->dma_req;
- dma_params.sync_mode = dma_data->sync_mode;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- dma_params.src_amode = OMAP_DMA_AMODE_POST_INC;
- dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT;
- dma_params.src_or_dst_synch = OMAP_DMA_DST_SYNC;
- dma_params.src_start = runtime->dma_addr;
- dma_params.dst_start = dma_data->port_addr;
- dma_params.dst_port = OMAP_DMA_PORT_MPUI;
- dma_params.dst_fi = dma_data->packet_size;
- } else {
- dma_params.src_amode = OMAP_DMA_AMODE_CONSTANT;
- dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC;
- dma_params.src_or_dst_synch = OMAP_DMA_SRC_SYNC;
- dma_params.src_start = dma_data->port_addr;
- dma_params.dst_start = runtime->dma_addr;
- dma_params.src_port = OMAP_DMA_PORT_MPUI;
- dma_params.src_fi = dma_data->packet_size;
- }
- /*
- * Set DMA transfer frame size equal to ALSA period size and frame
- * count as no. of ALSA periods. Then with DMA frame interrupt enabled,
- * we can transfer the whole ALSA buffer with single DMA transfer but
- * still can get an interrupt at each period bounary
- */
- bytes = snd_pcm_lib_period_bytes(substream);
- dma_params.elem_count = bytes >> dma_data->data_type;
- dma_params.frame_count = runtime->periods;
- omap_set_dma_params(prtd->dma_ch, &dma_params);
-
- if ((cpu_is_omap1510()))
- omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ |
- OMAP_DMA_LAST_IRQ | OMAP_DMA_BLOCK_IRQ);
- else if (!substream->runtime->no_period_wakeup)
- omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ);
- else {
- /*
- * No period wakeup:
- * we need to disable BLOCK_IRQ, which is enabled by the omap
- * dma core at request dma time.
- */
- omap_disable_dma_irq(prtd->dma_ch, OMAP_DMA_BLOCK_IRQ);
- }
-
- if (!(cpu_class_is_omap1())) {
- omap_set_dma_src_burst_mode(prtd->dma_ch,
- OMAP_DMA_DATA_BURST_16);
- omap_set_dma_dest_burst_mode(prtd->dma_ch,
- OMAP_DMA_DATA_BURST_16);
- }
-