ASoC: rsnd: DMA cleanup for flexible SSI/SRC selection

Current R-Car sound SSI/SRC/DVC selection has feature limit.
(It is assuming that SSI/SRC are using same index number)

So that enabling SSI/SRC flexible selection,
this patch modifies DMA settings.

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

sound/soc/sh/rcar/core.c

@@ -239,8 +239,21 @@ static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 
 }
 
-static void rsnd_dma_of_name(struct rsnd_dma *dma,
-			     int is_play, char *dma_name)
+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);
@@ -248,7 +261,6 @@ static void rsnd_dma_of_name(struct rsnd_dma *dma,
 	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];
-	struct rsnd_mod *src_mod, *dst_mod;
 	int i, index;
 
 
@@ -285,17 +297,12 @@ static void rsnd_dma_of_name(struct rsnd_dma *dma,
 	}
 
 	if (is_play) {
-		src_mod = mod[index - 1];
-		dst_mod = mod[index];
+		*mod_from = mod[index - 1];
+		*mod_to   = mod[index];
 	} else {
-		src_mod = mod[index];
-		dst_mod = mod[index - 1];
+		*mod_from = mod[index];
+		*mod_to   = mod[index - 1];
 	}
-
-	index = 0;
-	index = _rsnd_dma_of_name(dma_name + index, src_mod);
-	*(dma_name + index++) = '_';
-	index = _rsnd_dma_of_name(dma_name + index, dst_mod);
 }
 
 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
@@ -303,6 +310,8 @@ int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 {
 	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;
@@ -315,10 +324,16 @@ int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 	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);
+	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);
 
-	dev_dbg(dev, "dma name : %s\n", dma_name);
+	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,

sound/soc/sh/rcar/gen.c

@@ -168,7 +168,7 @@ static int rsnd_gen_regmap_init(struct rsnd_priv *priv,
  *	SSI : 0xec541000 / 0xec241008 / 0xec24100c
  *	SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
  *	SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
- *	CMD : 0xec500000 / 0xec008000                             0xec308000
+ *	CMD : 0xec500000 /            / 0xec008000                0xec308000
  */
 #define RDMA_SSI_I_N(addr, i)	(addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
 #define RDMA_SSI_O_N(addr, i)	(addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
@@ -188,14 +188,13 @@ static int rsnd_gen_regmap_init(struct rsnd_priv *priv,
 #define RDMA_CMD_O_N(addr, i)	(addr ##_reg - 0x004f8000 + (0x400 * i))
 #define RDMA_CMD_O_P(addr, i)	(addr ##_reg - 0x001f8000 + (0x400 * i))
 
-static void rsnd_gen2_dma_addr(struct rsnd_priv *priv,
-		       struct rsnd_dma *dma,
-		       struct dma_slave_config *cfg,
-		       int is_play, int slave_id)
+static dma_addr_t
+rsnd_gen2_dma_addr(struct rsnd_priv *priv,
+		   struct rsnd_mod *mod,
+		   int is_play, int is_from)
 {
 	struct platform_device *pdev = rsnd_priv_to_pdev(priv);
 	struct device *dev = rsnd_priv_to_dev(priv);
-	struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 	dma_addr_t ssi_reg = platform_get_resource(pdev,
 				IORESOURCE_MEM, RSND_GEN2_SSI)->start;
@@ -206,76 +205,68 @@ static void rsnd_gen2_dma_addr(struct rsnd_priv *priv,
 	int use_dvc = !!rsnd_io_to_mod_dvc(io);
 	int id = rsnd_mod_id(mod);
 	struct dma_addr {
-		dma_addr_t src_addr;
-		dma_addr_t dst_addr;
+		dma_addr_t out_addr;
+		dma_addr_t in_addr;
 	} dma_addrs[3][2][3] = {
 		/* SRC */
 		{{{ 0,				0 },
 		/* Capture */
-		  { RDMA_SRC_O_N(src, id),	0 },
-		  { RDMA_CMD_O_N(src, id),	0 } },
+		  { RDMA_SRC_O_N(src, id),	RDMA_SRC_I_P(src, id) },
+		  { RDMA_CMD_O_N(src, id),	RDMA_SRC_I_P(src, id) } },
 		 /* Playback */
 		 {{ 0,				0, },
-		  { 0,				RDMA_SRC_I_N(src, id) },
-		  { 0,				RDMA_SRC_I_N(src, id) } }
+		  { RDMA_SRC_O_P(src, id),	RDMA_SRC_I_N(src, id) },
+		  { RDMA_CMD_O_P(src, id),	RDMA_SRC_I_N(src, id) } }
 		},
 		/* SSI */
 		/* Capture */
 		{{{ RDMA_SSI_O_N(ssi, id),	0 },
-		  { 0,				0 },
-		  { 0,				0 } },
+		  { RDMA_SSIU_O_P(ssi, id),	0 },
+		  { RDMA_SSIU_O_P(ssi, id),	0 } },
 		 /* Playback */
 		 {{ 0,				RDMA_SSI_I_N(ssi, id) },
-		  { 0,				0 },
-		  { 0,				0 } }
+		  { 0,				RDMA_SSIU_I_P(ssi, id) },
+		  { 0,				RDMA_SSIU_I_P(ssi, id) } }
 		},
 		/* SSIU */
 		/* Capture */
 		{{{ RDMA_SSIU_O_N(ssi, id),	0 },
-		  { RDMA_SSIU_O_P(ssi, id),	RDMA_SRC_I_P(src, id) },
-		  { RDMA_SSIU_O_P(ssi, id),	RDMA_SRC_I_P(src, id) } },
+		  { RDMA_SSIU_O_P(ssi, id),	0 },
+		  { RDMA_SSIU_O_P(ssi, id),	0 } },
 		 /* Playback */
 		 {{ 0,				RDMA_SSIU_I_N(ssi, id) },
-		  { RDMA_SRC_O_P(src, id),	RDMA_SSIU_I_P(ssi, id) },
-		  { RDMA_CMD_O_P(src, id),	RDMA_SSIU_I_P(ssi, id) } } },
+		  { 0,				RDMA_SSIU_I_P(ssi, id) },
+		  { 0,				RDMA_SSIU_I_P(ssi, id) } } },
 	};
 
 	/* it shouldn't happen */
-	if (use_dvc & !use_src) {
+	if (use_dvc & !use_src)
 		dev_err(dev, "DVC is selected without SRC\n");
-		return;
-	}
 
 	/* use SSIU or SSI ? */
 	if (is_ssi && (0 == strcmp(rsnd_mod_dma_name(mod), "ssiu")))
 		is_ssi++;
 
-	cfg->src_addr = dma_addrs[is_ssi][is_play][use_src + use_dvc].src_addr;
-	cfg->dst_addr = dma_addrs[is_ssi][is_play][use_src + use_dvc].dst_addr;
-
-	dev_dbg(dev, "dma%d addr - src : %x / dst : %x\n",
-		id, cfg->src_addr, cfg->dst_addr);
+	return (is_from) ?
+		dma_addrs[is_ssi][is_play][use_src + use_dvc].out_addr :
+		dma_addrs[is_ssi][is_play][use_src + use_dvc].in_addr;
 }
 
-void rsnd_gen_dma_addr(struct rsnd_priv *priv,
-		       struct rsnd_dma *dma,
-		       struct dma_slave_config *cfg,
-		       int is_play, int slave_id)
+dma_addr_t rsnd_gen_dma_addr(struct rsnd_priv *priv,
+			     struct rsnd_mod *mod,
+			     int is_play, int is_from)
 {
-	cfg->slave_id   = slave_id;
-	cfg->src_addr   = 0;
-	cfg->dst_addr   = 0;
-	cfg->direction  = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
-
 	/*
 	 * gen1 uses default DMA addr
 	 */
 	if (rsnd_is_gen1(priv))
-		return;
+		return 0;
 
-	rsnd_gen2_dma_addr(priv, dma, cfg, is_play, slave_id);
-}
+	if (!mod)
+		return 0;
 
+	return rsnd_gen2_dma_addr(priv, mod, is_play, is_from);
+}
 
 /*
  *		Gen2

sound/soc/sh/rcar/rsnd.h

@@ -279,10 +279,9 @@ int rsnd_gen_probe(struct platform_device *pdev,
 void __iomem *rsnd_gen_reg_get(struct rsnd_priv *priv,
 			       struct rsnd_mod *mod,
 			       enum rsnd_reg reg);
-void rsnd_gen_dma_addr(struct rsnd_priv *priv,
-		       struct rsnd_dma *dma,
-		       struct dma_slave_config *cfg,
-		       int is_play,  int slave_id);
+dma_addr_t rsnd_gen_dma_addr(struct rsnd_priv *priv,
+		       struct rsnd_mod *mod,
+		       int is_play,  int is_from);
 
 #define rsnd_is_gen1(s)		(((s)->info->flags & RSND_GEN_MASK) == RSND_GEN1)
 #define rsnd_is_gen2(s)		(((s)->info->flags & RSND_GEN_MASK) == RSND_GEN2)