ASoC: rsnd: add DVC support

This patch adds DVC (Digital Volume Controller)
support which is member of CMD unit.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit bff58ea4f43d9b4a9fd6fb05fabc8f50f68131f5)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

7 files changed, 366 insertions, 2 deletions

diff --git a/sound/soc/sh/rcar/Makefile b/sound/soc/sh/rcar/Makefile
index 7d0051ced838..9ac536429800 100644
--- a/sound/soc/sh/rcar/Makefile
+++ b/sound/soc/sh/rcar/Makefile
@@ -1,2 +1,2 @@
-snd-soc-rcar-objs	:= core.o gen.o src.o adg.o ssi.o
+snd-soc-rcar-objs	:= core.o gen.o src.o adg.o ssi.o dvc.o
 obj-$(CONFIG_SND_SOC_RCAR)	+= snd-soc-rcar.o
\ No newline at end of file
diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index 41556b2ef21e..fc41a0e8b09f 100644
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -57,6 +57,24 @@ static u32 rsnd_adg_ssi_ws_timing_gen2(struct rsnd_dai_stream *io)
 	return (0x6 + ws) << 8;
 }
 
+int rsnd_adg_set_cmd_timsel_gen2(struct rsnd_dai *rdai,
+				 struct rsnd_mod *mod,
+				 struct rsnd_dai_stream *io)
+{
+	int id = rsnd_mod_id(mod);
+	int shift = (id % 2) ? 16 : 0;
+	u32 mask, val;
+
+	val = rsnd_adg_ssi_ws_timing_gen2(io);
+
+	val  = val	<< shift;
+	mask = 0xffff	<< shift;
+
+	rsnd_mod_bset(mod, CMDOUT_TIMSEL, mask, val);
+
+	return 0;
+}
+
 static int rsnd_adg_set_src_timsel_gen2(struct rsnd_dai *rdai,
 					struct rsnd_mod *mod,
 					struct rsnd_dai_stream *io,
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 4880ecacb5f3..bacdfb7f1266 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -644,6 +644,11 @@ static int rsnd_path_init(struct rsnd_priv *priv,
 	if (ret < 0)
 		return ret;
 
+	/* DVC */
+	ret = rsnd_path_parse(priv, io, dvc);
+	if (ret < 0)
+		return ret;
+
 	return ret;
 }
 
@@ -867,6 +872,20 @@ static struct snd_pcm_ops rsnd_pcm_ops = {
 
 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
+	struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+	struct rsnd_dai *rdai;
+	int i, ret;
+
+	for_each_rsnd_dai(rdai, priv, i) {
+		ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
+		if (ret)
+			return ret;
+
+		ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
+		if (ret)
+			return ret;
+	}
+
 	return snd_pcm_lib_preallocate_pages_for_all(
 		rtd->pcm,
 		SNDRV_DMA_TYPE_DEV,
@@ -906,6 +925,7 @@ static int rsnd_probe(struct platform_device *pdev)
 		rsnd_gen_probe,
 		rsnd_ssi_probe,
 		rsnd_src_probe,
+		rsnd_dvc_probe,
 		rsnd_adg_probe,
 		rsnd_dai_probe,
 	};
diff --git a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
new file mode 100644
index 000000000000..74769b1be005
--- /dev/null
+++ b/sound/soc/sh/rcar/dvc.c
@@ -0,0 +1,273 @@
+/*
+ * Renesas R-Car DVC support
+ *
+ * Copyright (C) 2014 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include "rsnd.h"
+
+#define RSND_DVC_NAME_SIZE	16
+#define RSND_DVC_VOLUME_MAX	100
+#define RSND_DVC_VOLUME_NUM	2
+struct rsnd_dvc {
+	struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
+	struct rsnd_mod mod;
+	struct clk *clk;
+	long volume[RSND_DVC_VOLUME_NUM];
+};
+
+#define rsnd_mod_to_dvc(_mod)	\
+	container_of((_mod), struct rsnd_dvc, mod)
+
+#define for_each_rsnd_dvc(pos, priv, i)				\
+	for ((i) = 0;						\
+	     ((i) < rsnd_dvc_nr(priv)) &&			\
+	     ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);	\
+	     i++)
+
+static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	u32 max = (0x00800000 - 1);
+	u32 vol[RSND_DVC_VOLUME_NUM];
+	int i;
+
+	for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
+		vol[i] = max / RSND_DVC_VOLUME_MAX * dvc->volume[i];
+
+	rsnd_mod_write(mod, DVC_VOL0R, vol[0]);
+	rsnd_mod_write(mod, DVC_VOL1R, vol[1]);
+}
+
+static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
+			 struct rsnd_dai *rdai)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
+	struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
+	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	int dvc_id = rsnd_mod_id(dvc_mod);
+	int src_id = rsnd_mod_id(src_mod);
+	u32 route[] = {
+		[0] = 0x30000,
+		[1] = 0x30001,
+		[2] = 0x40000,
+		[3] = 0x10000,
+		[4] = 0x20000,
+		[5] = 0x40100
+	};
+
+	if (src_id >= ARRAY_SIZE(route)) {
+		dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
+		return -EINVAL;
+	}
+
+	clk_prepare_enable(dvc->clk);
+
+	/*
+	 * fixme
+	 * it doesn't support CTU/MIX
+	 */
+	rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
+
+	rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
+	rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
+
+	rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
+
+	rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
+
+	/*  enable Volume  */
+	rsnd_mod_write(dvc_mod, DVC_DVUCR, 0x100);
+
+	/* ch0/ch1 Volume */
+	rsnd_dvc_volume_update(dvc_mod);
+
+	rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
+
+	rsnd_mod_write(dvc_mod, DVC_DVUER, 1);
+
+	rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
+
+	return 0;
+}
+
+static int rsnd_dvc_quit(struct rsnd_mod *mod,
+			 struct rsnd_dai *rdai)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+
+	clk_disable_unprepare(dvc->clk);
+
+	return 0;
+}
+
+static int rsnd_dvc_start(struct rsnd_mod *mod,
+			  struct rsnd_dai *rdai)
+{
+	rsnd_mod_write(mod, CMD_CTRL, 0x10);
+
+	return 0;
+}
+
+static int rsnd_dvc_stop(struct rsnd_mod *mod,
+			 struct rsnd_dai *rdai)
+{
+	rsnd_mod_write(mod, CMD_CTRL, 0);
+
+	return 0;
+}
+
+static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
+			       struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = RSND_DVC_VOLUME_NUM;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = RSND_DVC_VOLUME_MAX;
+
+	return 0;
+}
+
+static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	int i;
+
+	for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
+		ucontrol->value.integer.value[i] = dvc->volume[i];
+
+	return 0;
+}
+
+static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	int i, change = 0;
+
+	for (i = 0; i < RSND_DVC_VOLUME_NUM; i++) {
+		if (ucontrol->value.integer.value[i] < 0 ||
+		    ucontrol->value.integer.value[i] > RSND_DVC_VOLUME_MAX)
+			return -EINVAL;
+
+		change |= (ucontrol->value.integer.value[i] != dvc->volume[i]);
+	}
+
+	if (change) {
+		for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
+			dvc->volume[i] = ucontrol->value.integer.value[i];
+
+		rsnd_dvc_volume_update(mod);
+	}
+
+	return change;
+}
+
+static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
+			    struct rsnd_dai *rdai,
+			    struct snd_soc_pcm_runtime *rtd)
+{
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct snd_card *card = rtd->card->snd_card;
+	struct snd_kcontrol *kctrl;
+	static struct snd_kcontrol_new knew = {
+		.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name		= "Playback Volume",
+		.info		= rsnd_dvc_volume_info,
+		.get		= rsnd_dvc_volume_get,
+		.put		= rsnd_dvc_volume_put,
+	};
+	int ret;
+
+	if (!rsnd_dai_is_play(rdai, io)) {
+		dev_err(dev, "DVC%d is connected to Capture DAI\n",
+			rsnd_mod_id(mod));
+		return -EINVAL;
+	}
+
+	kctrl = snd_ctl_new1(&knew, mod);
+	if (!kctrl)
+		return -ENOMEM;
+
+	ret = snd_ctl_add(card, kctrl);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct rsnd_mod_ops rsnd_dvc_ops = {
+	.name		= "dvc (gen2)",
+	.init		= rsnd_dvc_init,
+	.quit		= rsnd_dvc_quit,
+	.start		= rsnd_dvc_start,
+	.stop		= rsnd_dvc_stop,
+	.pcm_new	= rsnd_dvc_pcm_new,
+};
+
+struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
+{
+	if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
+		id = 0;
+
+	return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
+}
+
+int rsnd_dvc_probe(struct platform_device *pdev,
+		   const struct rsnd_of_data *of_data,
+		   struct rsnd_priv *priv)
+{
+	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_dvc *dvc;
+	struct clk *clk;
+	char name[RSND_DVC_NAME_SIZE];
+	int i, nr;
+
+	nr = info->dvc_info_nr;
+	if (!nr)
+		return 0;
+
+	/* This driver doesn't support Gen1 at this point */
+	if (rsnd_is_gen1(priv)) {
+		dev_warn(dev, "CMD is not supported on Gen1\n");
+		return -EINVAL;
+	}
+
+	dvc	= devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
+	if (!dvc) {
+		dev_err(dev, "CMD allocate failed\n");
+		return -ENOMEM;
+	}
+
+	priv->dvc_nr	= nr;
+	priv->dvc	= dvc;
+
+	for_each_rsnd_dvc(dvc, priv, i) {
+		snprintf(name, RSND_DVC_NAME_SIZE, "dvc.%d", i);
+
+		clk = devm_clk_get(dev, name);
+		if (IS_ERR(clk))
+			return PTR_ERR(clk);
+
+		dvc->info = &info->dvc_info[i];
+		dvc->clk  = clk;
+
+		rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
+
+		dev_dbg(dev, "CMD%d probed\n", i);
+	}
+
+	return 0;
+}
diff --git a/sound/soc/sh/rcar/gen.c b/sound/soc/sh/rcar/gen.c
index 50a1ef3eb1c6..a135d4c9d080 100644
--- a/sound/soc/sh/rcar/gen.c
+++ b/sound/soc/sh/rcar/gen.c
@@ -181,6 +181,8 @@ static int rsnd_gen2_regmap_init(struct rsnd_priv *priv, struct rsnd_gen *gen)
 		RSND_GEN2_M_REG(gen, SCU,	SRC_BUSIF_MODE,	0x0,	0x20),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_ROUTE_MODE0,0xc,	0x20),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_CTRL,	0x10,	0x20),
+		RSND_GEN2_M_REG(gen, SCU,	CMD_ROUTE_SLCT,	0x18c,	0x20),
+		RSND_GEN2_M_REG(gen, SCU,	CMD_CTRL,	0x190,	0x20),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_SWRSR,	0x200,	0x40),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_SRCIR,	0x204,	0x40),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_ADINR,	0x214,	0x40),
@@ -189,6 +191,14 @@ static int rsnd_gen2_regmap_init(struct rsnd_priv *priv, struct rsnd_gen *gen)
 		RSND_GEN2_M_REG(gen, SCU,	SRC_SRCCR,	0x224,	0x40),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_BSDSR,	0x22c,	0x40),
 		RSND_GEN2_M_REG(gen, SCU,	SRC_BSISR,	0x238,	0x40),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_SWRSR,	0xe00,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_DVUIR,	0xe04,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_ADINR,	0xe08,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_DVUCR,	0xe10,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_ZCMCR,	0xe14,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_VOL0R,	0xe28,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_VOL1R,	0xe2c,	0x100),
+		RSND_GEN2_M_REG(gen, SCU,	DVC_DVUER,	0xe48,	0x100),
 
 		RSND_GEN2_S_REG(gen, ADG,	BRRA,		0x00),
 		RSND_GEN2_S_REG(gen, ADG,	BRRB,		0x04),
@@ -207,6 +217,7 @@ static int rsnd_gen2_regmap_init(struct rsnd_priv *priv, struct rsnd_gen *gen)
 		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL2,	0x50),
 		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL3,	0x54),
 		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL4,	0x58),
+		RSND_GEN2_S_REG(gen, ADG,	CMDOUT_TIMSEL,	0x5c),
 
 		RSND_GEN2_M_REG(gen, SSI,	SSICR,		0x00,	0x40),
 		RSND_GEN2_M_REG(gen, SSI,	SSISR,		0x04,	0x40),
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index 6156ceebd58b..5aa790170b01 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -44,6 +44,15 @@ enum rsnd_reg {
 	RSND_REG_SRC_IFSCR,
 	RSND_REG_SRC_IFSVR,
 	RSND_REG_SRC_SRCCR,
+	RSND_REG_CMD_ROUTE_SLCT,
+	RSND_REG_DVC_SWRSR,
+	RSND_REG_DVC_DVUIR,
+	RSND_REG_DVC_ADINR,
+	RSND_REG_DVC_DVUCR,
+	RSND_REG_DVC_ZCMCR,
+	RSND_REG_DVC_VOL0R,
+	RSND_REG_DVC_VOL1R,
+	RSND_REG_DVC_DVUER,
 
 	/* ADG */
 	RSND_REG_BRRA,
@@ -79,6 +88,8 @@ enum rsnd_reg {
 	RSND_REG_SHARE17,
 	RSND_REG_SHARE18,
 	RSND_REG_SHARE19,
+	RSND_REG_SHARE20,
+	RSND_REG_SHARE21,
 
 	RSND_REG_MAX,
 };
@@ -114,6 +125,8 @@ enum rsnd_reg {
 #define RSND_REG_SRCOUT_TIMSEL3		RSND_REG_SHARE17
 #define RSND_REG_SRCOUT_TIMSEL4		RSND_REG_SHARE18
 #define RSND_REG_AUDIO_CLK_SEL2		RSND_REG_SHARE19
+#define RSND_REG_CMD_CTRL		RSND_REG_SHARE20
+#define RSND_REG_CMDOUT_TIMSEL		RSND_REG_SHARE21
 
 struct rsnd_of_data;
 struct rsnd_priv;
@@ -166,6 +179,7 @@ void  rsnd_dma_quit(struct rsnd_priv *priv,
 enum rsnd_mod_type {
 	RSND_MOD_SRC = 0,
 	RSND_MOD_SSI,
+	RSND_MOD_DVC,
 	RSND_MOD_MAX,
 };
 
@@ -183,6 +197,9 @@ struct rsnd_mod_ops {
 		     struct rsnd_dai *rdai);
 	int (*stop)(struct rsnd_mod *mod,
 		    struct rsnd_dai *rdai);
+	int (*pcm_new)(struct rsnd_mod *mod,
+		       struct rsnd_dai *rdai,
+		       struct snd_soc_pcm_runtime *rtd);
 };
 
 struct rsnd_dai_stream;
@@ -223,6 +240,7 @@ struct rsnd_dai_stream {
 };
 #define rsnd_io_to_mod_ssi(io)	((io)->mod[RSND_MOD_SSI])
 #define rsnd_io_to_mod_src(io)	((io)->mod[RSND_MOD_SRC])
+#define rsnd_io_to_mod_dvc(io)	((io)->mod[RSND_MOD_DVC])
 
 struct rsnd_dai {
 	char name[RSND_DAI_NAME_SIZE];
@@ -286,6 +304,9 @@ int rsnd_adg_set_convert_clk_gen2(struct rsnd_mod *mod,
 int rsnd_adg_set_convert_timing_gen2(struct rsnd_mod *mod,
 				     struct rsnd_dai *rdai,
 				     struct rsnd_dai_stream *io);
+int rsnd_adg_set_cmd_timsel_gen2(struct rsnd_dai *rdai,
+				 struct rsnd_mod *mod,
+				 struct rsnd_dai_stream *io);
 
 /*
  *	R-Car sound priv
@@ -323,6 +344,12 @@ struct rsnd_priv {
 	int ssi_nr;
 
 	/*
+	 * below value will be filled on rsnd_dvc_probe()
+	 */
+	void *dvc;
+	int dvc_nr;
+
+	/*
 	 * below value will be filled on rsnd_dai_probe()
 	 */
 	struct snd_soc_dai_driver *daidrv;
@@ -374,4 +401,17 @@ int rsnd_ssi_probe(struct platform_device *pdev,
 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id);
 int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod);
 
+/*
+ *	R-Car DVC
+ */
+int rsnd_dvc_probe(struct platform_device *pdev,
+		   const struct rsnd_of_data *of_data,
+		   struct rsnd_priv *priv);
+void rsnd_dvc_remove(struct platform_device *pdev,
+		     struct rsnd_priv *priv);
+struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id);
+
+#define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
+
+
 #endif
diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index 2a0f7e63ffc8..e3b078e7c3aa 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -536,12 +536,14 @@ static int rsnd_src_init_gen2(struct rsnd_mod *mod,
 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
 			       struct rsnd_dai *rdai)
 {
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	u32 val = rsnd_io_to_mod_dvc(io) ? 0x01 : 0x11;
 
 	rsnd_dma_start(rsnd_mod_to_dma(&src->mod));
 
 	rsnd_mod_write(mod, SSI_CTRL, 0x1);
-	rsnd_mod_write(mod, SRC_CTRL, 0x11);
+	rsnd_mod_write(mod, SRC_CTRL, val);
 
 	return rsnd_src_start(mod, rdai);
 }