-static int spear_pcm_mmap(struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- return dma_mmap_writecombine(substream->pcm->card->dev, vma,
- runtime->dma_area, runtime->dma_addr,
- runtime->dma_bytes);
-}
-
-static struct snd_pcm_ops spear_pcm_ops = {
- .open = spear_pcm_open,
- .close = snd_dmaengine_pcm_close_release_chan,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = spear_pcm_hw_params,
- .hw_free = spear_pcm_hw_free,
- .trigger = snd_dmaengine_pcm_trigger,
- .pointer = snd_dmaengine_pcm_pointer,
- .mmap = spear_pcm_mmap,
-};
-
-static int
-spear_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream,
- size_t size)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
-
- buf->area = dma_alloc_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- if (!buf->area)
- return -ENOMEM;
-
- dev_info(buf->dev.dev,
- " preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *)buf->area, (void *)buf->addr, size);
-
- buf->bytes = size;
- return 0;
-}
-
-static void spear_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < 2; stream++) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf || !buf->area)
- continue;
-
- dma_free_writecombine(pcm->card->dev, buf->bytes,
- buf->area, buf->addr);
- buf->area = NULL;
- }
-}
-
-static u64 spear_pcm_dmamask = DMA_BIT_MASK(32);
-
-static int spear_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
- struct snd_card *card = rtd->card->snd_card;
- int ret;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &spear_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
- if (rtd->cpu_dai->driver->playback.channels_min) {
- ret = spear_pcm_preallocate_dma_buffer(rtd->pcm,
- SNDRV_PCM_STREAM_PLAYBACK,
- spear_pcm_hardware.buffer_bytes_max);
- if (ret)
- return ret;
- }
-
- if (rtd->cpu_dai->driver->capture.channels_min) {
- ret = spear_pcm_preallocate_dma_buffer(rtd->pcm,
- SNDRV_PCM_STREAM_CAPTURE,
- spear_pcm_hardware.buffer_bytes_max);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static struct snd_soc_platform_driver spear_soc_platform = {
- .ops = &spear_pcm_ops,
- .pcm_new = spear_pcm_new,
- .pcm_free = spear_pcm_free,