int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
int is_play, int id)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_slave_config cfg;
struct rsnd_mod *mod_from;
struct rsnd_mod *mod_to;
char dma_name[DMA_NAME_SIZE];
dma_cap_mask_t mask;
int ret;
if (dma->chan) {
dev_err(dev, "it already has dma channel\n");
return -EIO;
}
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
rsnd_dma_of_name(mod_from, mod_to, dma_name);
cfg.slave_id = id;
cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
cfg.src_addr = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
cfg.dst_addr = rsnd_gen_dma_addr(priv, mod_to, is_play, 0);
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dev_dbg(dev, "dma : %s %pad -> %pad\n",
dma_name, &cfg.src_addr, &cfg.dst_addr);
dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
(void *)id, dev,
dma_name);
if (!dma->chan) {
dev_err(dev, "can't get dma channel\n");
return -EIO;
}
ret = dmaengine_slave_config(dma->chan, &cfg);
if (ret < 0)
goto rsnd_dma_init_err;
dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
return 0;
rsnd_dma_init_err:
rsnd_dma_quit(priv, dma);
return ret;
}
int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
int is_play, int id)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_slave_config cfg;
char dma_name[DMA_NAME_SIZE];
dma_cap_mask_t mask;
int ret;
if (dma->chan) {
dev_err(dev, "it already has dma channel\n");
return -EIO;
}
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
rsnd_dma_of_name(dma, is_play, dma_name);
rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id);
dev_dbg(dev, "dma name : %s\n", dma_name);
dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
(void *)id, dev,
dma_name);
if (!dma->chan) {
dev_err(dev, "can't get dma channel\n");
return -EIO;
}
ret = dmaengine_slave_config(dma->chan, &cfg);
if (ret < 0)
goto rsnd_dma_init_err;
dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
return 0;
rsnd_dma_init_err:
rsnd_dma_quit(priv, dma);
return ret;
}
