int __devinit snd_ad1816a_pcm(struct snd_ad1816a *chip, int device, struct snd_pcm **rpcm)
{
int error;
struct snd_pcm *pcm;
if ((error = snd_pcm_new(chip->card, "AD1816A", device, 1, 1, &pcm)))
return error;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ad1816a_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ad1816a_capture_ops);
pcm->private_data = chip;
pcm->info_flags = (chip->dma1 == chip->dma2 ) ? SNDRV_PCM_INFO_JOINT_DUPLEX : 0;
strcpy(pcm->name, snd_ad1816a_chip_id(chip));
snd_ad1816a_init(chip);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_isa_data(),
64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);
chip->pcm = pcm;
if (rpcm)
*rpcm = pcm;
return 0;
}
/*
* Allocates some kernel memory that we can use for DMA.
* I think this means that the memory has to map to
* contiguous pages of physical memory.
*/
static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size)
{
if (buf) {
if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
size, buf) < 0) {
snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
return NULL;
}
}
return buf;
}
