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ASoC: rsnd: use union with rsnd_dmaen / rsnd_dmapp 

Renesas R-Car needs 2 DMACs.1st DMAC is DMAEngine, and 2nd DMAC is
implemented as local code. These 2 DMACs are never shared.
We can use union for these.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2015-02-20 10:29:13 +00:00 committed by Mark Brown
parent aaf4fce019
commit 0d00a52182
2 changed files with 39 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
sound/soc/sh/rcar/dma.c
View File

@ -76,11 +76,14 @@ static void rsnd_dmaen_of_name(struct rsnd_mod *mod_from,
static void rsnd_dmaen_stop(struct rsnd_dma *dma)
{
dmaengine_terminate_all(dma->chan);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
dmaengine_terminate_all(dmaen->chan);
}
static void rsnd_dmaen_start(struct rsnd_dma *dma)
{
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(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);
@ -89,7 +92,7 @@ static void rsnd_dmaen_start(struct rsnd_dma *dma)
struct dma_async_tx_descriptor *desc;
int is_play = rsnd_io_is_play(io);
desc = dmaengine_prep_dma_cyclic(dma->chan,
desc = dmaengine_prep_dma_cyclic(dmaen->chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream),
@ -109,12 +112,13 @@ static void rsnd_dmaen_start(struct rsnd_dma *dma)
return;
}
dma_async_issue_pending(dma->chan);
dma_async_issue_pending(dmaen->chan);
}
static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
{
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_slave_config cfg = {};
struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
@ -124,7 +128,7 @@ static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
dma_cap_mask_t mask;
int ret;
if (dma->chan) {
if (dmaen->chan) {
dev_err(dev, "it already has dma channel\n");
return -EIO;
}
@ -145,15 +149,15 @@ static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
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,
dmaen->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
(void *)id, dev,
dma_name);
if (!dma->chan) {
if (!dmaen->chan) {
dev_err(dev, "can't get dma channel\n");
goto rsnd_dma_channel_err;
}
ret = dmaengine_slave_config(dma->chan, &cfg);
ret = dmaengine_slave_config(dmaen->chan, &cfg);
if (ret < 0)
goto rsnd_dma_init_err;
@ -174,10 +178,12 @@ static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
static void rsnd_dmaen_quit(struct rsnd_dma *dma)
{
if (dma->chan)
dma_release_channel(dma->chan);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
dma->chan = NULL;
if (dmaen->chan)
dma_release_channel(dmaen->chan);
dmaen->chan = NULL;
}
static struct rsnd_dma_ops rsnd_dmaen_ops = {
@ -257,7 +263,8 @@ static u32 rsnd_dmapp_get_chcr(struct rsnd_mod *mod_from,
}
#define rsnd_dmapp_addr(dmac, dma, reg) \
(dmac->base + 0x20 + (0x10 * dma->dmapp_id) + reg)
(dmac->base + 0x20 + reg + \
(0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
{
struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
@ -294,28 +301,31 @@ static void rsnd_dmapp_stop(struct rsnd_dma *dma)
static void rsnd_dmapp_start(struct rsnd_dma *dma)
{
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
rsnd_dmapp_write(dma, dma->chcr, PDMACHCR);
rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
}
static int rsnd_dmapp_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
{
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
dev_dbg(dev, "Audio DMAC peri peri init\n");
dma->dmapp_id = dmac->dmapp_num;
dma->chcr = rsnd_dmapp_get_chcr(mod_from, mod_to) | PDMACHCR_DE;
dmapp->dmapp_id = dmac->dmapp_num;
dmapp->chcr = rsnd_dmapp_get_chcr(mod_from, mod_to) | PDMACHCR_DE;
dmac->dmapp_num++;
rsnd_dmapp_stop(dma);
dev_dbg(dev, "id/src/dst/chcr = %d/%x/%x/%08x\n",
dma->dmapp_id, dma->src_addr, dma->dst_addr, dma->chcr);
dmapp->dmapp_id, dma->src_addr, dma->dst_addr, dmapp->chcr);
return 0;
}

16
sound/soc/sh/rcar/rsnd.h
View File

@ -179,14 +179,26 @@ struct rsnd_dma_ops {
void (*quit)(struct rsnd_dma *dma);
};
struct rsnd_dma {
struct rsnd_dmaen {
struct dma_chan *chan;
struct rsnd_dma_ops *ops;
};
struct rsnd_dmapp {
int dmapp_id;
u32 chcr;
};
struct rsnd_dma {
struct rsnd_dma_ops *ops;
dma_addr_t src_addr;
dma_addr_t dst_addr;
union {
struct rsnd_dmaen en;
struct rsnd_dmapp pp;
} dma;
};
#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
void rsnd_dma_start(struct rsnd_dma *dma);
void rsnd_dma_stop(struct rsnd_dma *dma);