ASoC: rsnd: add SSIU BUSIF support

Gen2 has BUSIF0-3, Gen3 has BUSIF0-7 on some SSIU.
Current driver is assuming it is using BUSIF0 as default.
Thus, SSI is attaching SSIU (with BUSIF0) by using rsnd_ssiu_attach().
But, TDM split mode also needs other BUSIF to use it.
This patch adds missing SSIU BUSIFx support.

BUSIF is handled by SSIU instead of SSI anymore.
Thus, its settings no longer needed on SSI node on DT.
This patch removes its settings from Document, but driver is still
keeping compatibility. Thus, old DT style is still working.
But, to avoid confusing, it doesn't indicate old compatibility things on
Document. New SoC should have SSIU on DT from this patch.

1) old style DT is still supported (= no rcar_sound,ssiu node on DT)
2) If ssiu is not indicated on playback/capture,
   BUSIF0 will be used as default
	playback = <&ssi3>; /* ssiu30 will be selected */
3) you can select own ssiu
	playback = <&ssi32 &ssi3>; /* ssiu32 will be selected */

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

1 files changed, 31 insertions, 6 deletions

diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index 5daa6c932fce..0324a5c39619 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -218,7 +218,7 @@ struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node,
 	int i = 0;
 
 	for_each_child_of_node(of_node, np) {
-		if (i == rsnd_mod_id(mod) && (!chan))
+		if (i == rsnd_mod_id_raw(mod) && (!chan))
 			chan = of_dma_request_slave_channel(np, name);
 		i++;
 	}
@@ -344,14 +344,16 @@ static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
 			     struct rsnd_mod *mod)
 {
 	struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
+	struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
 	struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 	struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 	const u8 *entry = NULL;
 	int id = 255;
 	int size = 0;
 
-	if (mod == ssi) {
-		int busif = rsnd_ssi_get_busif(io);
+	if ((mod == ssi) ||
+	    (mod == ssiu)) {
+		int busif = rsnd_mod_id_sub(ssiu);
 
 		entry = gen2_id_table_ssiu;
 		size = ARRAY_SIZE(gen2_id_table_ssiu);
@@ -530,13 +532,14 @@ rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
 	struct device *dev = rsnd_priv_to_dev(priv);
 	phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
 	phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
-	int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod);
+	int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
+		     !!(rsnd_io_to_mod_ssiu(io) == mod);
 	int use_src = !!rsnd_io_to_mod_src(io);
 	int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
 		      !!rsnd_io_to_mod_mix(io) ||
 		      !!rsnd_io_to_mod_ctu(io);
 	int id = rsnd_mod_id(mod);
-	int busif = rsnd_ssi_get_busif(io);
+	int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
 	struct dma_addr {
 		dma_addr_t out_addr;
 		dma_addr_t in_addr;
@@ -620,7 +623,7 @@ static void rsnd_dma_of_path(struct rsnd_mod *this,
 			     struct rsnd_mod **mod_from,
 			     struct rsnd_mod **mod_to)
 {
-	struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
+	struct rsnd_mod *ssi;
 	struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 	struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
 	struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
@@ -631,6 +634,28 @@ static void rsnd_dma_of_path(struct rsnd_mod *this,
 	struct device *dev = rsnd_priv_to_dev(priv);
 	int nr, i, idx;
 
+	/*
+	 * It should use "rcar_sound,ssiu" on DT.
+	 * But, we need to keep compatibility for old version.
+	 *
+	 * If it has "rcar_sound.ssiu", it will be used.
+	 * If not, "rcar_sound.ssi" will be used.
+	 * see
+	 *	rsnd_ssiu_dma_req()
+	 *	rsnd_ssi_dma_req()
+	 */
+	if (rsnd_ssiu_of_node(priv)) {
+		struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
+
+		/* use SSIU */
+		ssi = ssiu;
+		if (this == rsnd_io_to_mod_ssi(io))
+			this = ssiu;
+	} else {
+		/* keep compatible, use SSI */
+		ssi = rsnd_io_to_mod_ssi(io);
+	}
+
 	if (!ssi)
 		return;