return mod->ops->name;
}
-char *rsnd_mod_dma_name(struct rsnd_mod *mod)
+struct dma_chan *rsnd_mod_dma_req(struct rsnd_mod *mod)
{
- if (!mod || !mod->ops)
- return "unknown";
-
- if (!mod->ops->dma_name)
- return mod->ops->name;
+ if (!mod || !mod->ops || !mod->ops->dma_req)
+ return NULL;
- return mod->ops->dma_name(mod);
+ return mod->ops->dma_req(mod);
}
- void rsnd_mod_init(struct rsnd_mod *mod,
+ int rsnd_mod_init(struct rsnd_mod *mod,
struct rsnd_mod_ops *ops,
struct clk *clk,
enum rsnd_mod_type type,
mod->ops = ops;
mod->type = type;
mod->clk = clk;
+
+ return ret;
+ }
+
+ void rsnd_mod_quit(struct rsnd_mod *mod)
+ {
+ if (mod->clk)
+ clk_unprepare(mod->clk);
}
-/*
- * rsnd_dma functions
- */
-void rsnd_dma_stop(struct rsnd_dma *dma)
-{
- dmaengine_terminate_all(dma->chan);
-}
-
-static void rsnd_dma_complete(void *data)
-{
- struct rsnd_dma *dma = (struct rsnd_dma *)data;
- struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
-
- /*
- * Renesas sound Gen1 needs 1 DMAC,
- * Gen2 needs 2 DMAC.
- * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
- * But, Audio-DMAC-peri-peri doesn't have interrupt,
- * and this driver is assuming that here.
- *
- * If Audio-DMAC-peri-peri has interrpt,
- * rsnd_dai_pointer_update() will be called twice,
- * ant it will breaks io->byte_pos
- */
-
- rsnd_dai_pointer_update(io, io->byte_per_period);
-}
-
-void rsnd_dma_start(struct rsnd_dma *dma)
-{
- struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
- struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
- struct snd_pcm_substream *substream = io->substream;
- struct device *dev = rsnd_priv_to_dev(priv);
- struct dma_async_tx_descriptor *desc;
-
- desc = dmaengine_prep_dma_cyclic(dma->chan,
- (dma->addr) ? dma->addr :
- substream->runtime->dma_addr,
- snd_pcm_lib_buffer_bytes(substream),
- snd_pcm_lib_period_bytes(substream),
- dma->dir,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
- if (!desc) {
- dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
- return;
- }
-
- desc->callback = rsnd_dma_complete;
- desc->callback_param = dma;
-
- if (dmaengine_submit(desc) < 0) {
- dev_err(dev, "dmaengine_submit() fail\n");
- return;
- }
-
- dma_async_issue_pending(dma->chan);
-}
-
-int rsnd_dma_available(struct rsnd_dma *dma)
-{
- return !!dma->chan;
-}
-
-#define DMA_NAME_SIZE 16
-#define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
-static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
-{
- if (mod)
- return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
- rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
- else
- return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
-
-}
-
-static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
- struct rsnd_mod *mod_to,
- char *dma_name)
-{
- int index = 0;
-
- index = _rsnd_dma_of_name(dma_name + index, mod_from);
- *(dma_name + index++) = '_';
- index = _rsnd_dma_of_name(dma_name + index, mod_to);
-}
-
-static void rsnd_dma_of_path(struct rsnd_dma *dma,
- int is_play,
- struct rsnd_mod **mod_from,
- struct rsnd_mod **mod_to)
-{
- struct rsnd_mod *this = rsnd_dma_to_mod(dma);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
- struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
- struct rsnd_mod *src = rsnd_io_to_mod_src(io);
- struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
- struct rsnd_mod *mod[MOD_MAX];
- int i, index;
-
-
- for (i = 0; i < MOD_MAX; i++)
- mod[i] = NULL;
-
- /*
- * in play case...
- *
- * src -> dst
- *
- * mem -> SSI
- * mem -> SRC -> SSI
- * mem -> SRC -> DVC -> SSI
- */
- mod[0] = NULL; /* for "mem" */
- index = 1;
- for (i = 1; i < MOD_MAX; i++) {
- if (!src) {
- mod[i] = ssi;
- } else if (!dvc) {
- mod[i] = src;
- src = NULL;
- } else {
- if ((!is_play) && (this == src))
- this = dvc;
-
- mod[i] = (is_play) ? src : dvc;
- i++;
- mod[i] = (is_play) ? dvc : src;
- src = NULL;
- dvc = NULL;
- }
-
- if (mod[i] == this)
- index = i;
-
- if (mod[i] == ssi)
- break;
- }
-
- if (is_play) {
- *mod_from = mod[index - 1];
- *mod_to = mod[index];
- } else {
- *mod_from = mod[index];
- *mod_to = mod[index - 1];
- }
-}
-
-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");
- goto rsnd_dma_channel_err;
- }
-
- 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);
-rsnd_dma_channel_err:
-
- /*
- * DMA failed. try to PIO mode
- * see
- * rsnd_ssi_fallback()
- * rsnd_rdai_continuance_probe()
- */
- return -EAGAIN;
-}
-
-void rsnd_dma_quit(struct rsnd_priv *priv,
- struct rsnd_dma *dma)
-{
- if (dma->chan)
- dma_release_channel(dma->chan);
-
- dma->chan = NULL;
-}
-
/*
* settting function
*/
projects / cascardo / linux.git / commitdiff