-
-static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_PAUSE,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .period_bytes_min = 32,
- .period_bytes_max = 8192 - 32,
- .periods_min = 1,
- .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
- .buffer_bytes_max = 128 * 1024,
- .fifo_size = 32,
-};
-
-struct pxa2xx_runtime_data {
- int dma_ch;
- struct pxa2xx_pcm_dma_params *params;
- pxa_dma_desc *dma_desc_array;
- dma_addr_t dma_desc_array_phys;
-};
-
-static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct pxa2xx_runtime_data *rtd = runtime->private_data;
- size_t totsize = params_buffer_bytes(params);
- size_t period = params_period_bytes(params);
- pxa_dma_desc *dma_desc;
- dma_addr_t dma_buff_phys, next_desc_phys;
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = totsize;
-
- dma_desc = rtd->dma_desc_array;
- next_desc_phys = rtd->dma_desc_array_phys;
- dma_buff_phys = runtime->dma_addr;
- do {
- next_desc_phys += sizeof(pxa_dma_desc);
- dma_desc->ddadr = next_desc_phys;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- dma_desc->dsadr = dma_buff_phys;
- dma_desc->dtadr = rtd->params->dev_addr;
- } else {
- dma_desc->dsadr = rtd->params->dev_addr;
- dma_desc->dtadr = dma_buff_phys;
- }
- if (period > totsize)
- period = totsize;
- dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
- dma_desc++;
- dma_buff_phys += period;
- } while (totsize -= period);
- dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
-
- return 0;
-}
-
-static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
-
- *rtd->params->drcmr = 0;
- snd_pcm_set_runtime_buffer(substream, NULL);
- return 0;
-}
-