ASoC: rsnd: SSI + DMA can select BUSIF

Sound data needs to be sent to R-Car sound SSI when playback.
But, there are 2 interfaces for it.
1st is SSITDR/SSIRDR which are mapped on SSI.
2nd is SSIn_BUSIF which are mapped on SSIU.

2nd SSIn_BUSIF is used when DMA transfer,
and it is always used if sound data came from via SRC.
But, we can use it when SSI+DMA case too.
(Current driver is assuming 1st SSITDR/SSIRDR for it)

2nd SSIn_BUSIF can be used as FIFO.
This is very helpful/useful for SSI+DMA.

But DMA address / DMA ID are not same between 1st/2nd cases.
This patch care about these settings.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 27 insertions, 10 deletions

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index 200eda019bc7..4d39505c21cf 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -106,18 +106,17 @@ struct rsnd_src {
 /*
  *		Gen1/Gen2 common functions
  */
-int rsnd_src_ssi_mode_init(struct rsnd_mod *ssi_mod,
-			   struct rsnd_dai *rdai)
+int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
+			struct rsnd_dai *rdai,
+			int use_busif)
 {
-	struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
-	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 	int ssi_id = rsnd_mod_id(ssi_mod);
 
 	/*
 	 * SSI_MODE0
 	 */
 	rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
-		      src_mod ? 0 : (1 << ssi_id));
+		      !use_busif << ssi_id);
 
 	/*
 	 * SSI_MODE1
@@ -143,6 +142,29 @@ int rsnd_src_ssi_mode_init(struct rsnd_mod *ssi_mod,
 				      0x2 << shift : 0x1 << shift);
 	}
 
+	/*
+	 * DMA settings for SSIU
+	 */
+	if (use_busif) {
+		rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR,
+			       rsnd_get_adinr(ssi_mod));
+		rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE,  1);
+		rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1);
+	}
+
+	return 0;
+}
+
+int rsnd_src_ssiu_stop(struct rsnd_mod *ssi_mod,
+			struct rsnd_dai *rdai,
+			int use_busif)
+{
+	/*
+	 * DMA settings for SSIU
+	 */
+	if (use_busif)
+		rsnd_mod_write(ssi_mod, SSI_CTRL, 0);
+
 	return 0;
 }
 
@@ -467,9 +489,6 @@ static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
 	if (ret < 0)
 		return ret;
 
-	rsnd_mod_write(mod, SSI_BUSIF_ADINR, rsnd_get_adinr(mod));
-	rsnd_mod_write(mod, SSI_BUSIF_MODE,  1);
-
 	rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
 
 	rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
@@ -554,7 +573,6 @@ static int rsnd_src_start_gen2(struct rsnd_mod *mod,
 
 	rsnd_dma_start(rsnd_mod_to_dma(&src->mod));
 
-	rsnd_mod_write(mod, SSI_CTRL, 0x1);
 	rsnd_mod_write(mod, SRC_CTRL, val);
 
 	return rsnd_src_start(mod, rdai);
@@ -565,7 +583,6 @@ static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
 {
 	struct rsnd_src *src = rsnd_mod_to_src(mod);
 
-	rsnd_mod_write(mod, SSI_CTRL, 0);
 	rsnd_mod_write(mod, SRC_CTRL, 0);
 
 	rsnd_dma_stop(rsnd_mod_to_dma(&src->mod));