1 files changed, 396 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
new file mode 100644
index 000000000..16befcbc3
--- /dev/null
+++ b/sound/soc/sh/rcar/dvc.c
@@ -0,0 +1,396 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Renesas R-Car DVC support
+//
+// Copyright (C) 2014 Renesas Solutions Corp.
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+/*
+ * Playback Volume
+ *	amixer set "DVC Out" 100%
+ *
+ * Capture Volume
+ *	amixer set "DVC In" 100%
+ *
+ * Playback Mute
+ *	amixer set "DVC Out Mute" on
+ *
+ * Capture Mute
+ *	amixer set "DVC In Mute" on
+ *
+ * Volume Ramp
+ *	amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
+ *	amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
+ *	amixer set "DVC Out Ramp" on
+ *	aplay xxx.wav &
+ *	amixer set "DVC Out"  80%  // Volume Down
+ *	amixer set "DVC Out" 100%  // Volume Up
+ */
+
+#include "rsnd.h"
+
+#define RSND_DVC_NAME_SIZE	16
+
+#define DVC_NAME "dvc"
+
+struct rsnd_dvc {
+	struct rsnd_mod mod;
+	struct rsnd_kctrl_cfg_m volume;
+	struct rsnd_kctrl_cfg_m mute;
+	struct rsnd_kctrl_cfg_s ren;	/* Ramp Enable */
+	struct rsnd_kctrl_cfg_s rup;	/* Ramp Rate Up */
+	struct rsnd_kctrl_cfg_s rdown;	/* Ramp Rate Down */
+};
+
+#define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id)
+#define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
+
+#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_activation(struct rsnd_mod *mod)
+{
+	rsnd_mod_write(mod, DVC_SWRSR, 0);
+	rsnd_mod_write(mod, DVC_SWRSR, 1);
+}
+
+static void rsnd_dvc_halt(struct rsnd_mod *mod)
+{
+	rsnd_mod_write(mod, DVC_DVUIR, 1);
+	rsnd_mod_write(mod, DVC_SWRSR, 0);
+}
+
+#define rsnd_dvc_get_vrpdr(dvc) (rsnd_kctrl_vals(dvc->rup) << 8 | \
+				 rsnd_kctrl_vals(dvc->rdown))
+#define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (rsnd_kctrl_valm(dvc->volume, 0) >> 13))
+
+static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io,
+					      struct rsnd_mod *mod)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	u32 val[RSND_MAX_CHANNELS];
+	int i;
+
+	/* Enable Ramp */
+	if (rsnd_kctrl_vals(dvc->ren))
+		for (i = 0; i < RSND_MAX_CHANNELS; i++)
+			val[i] = rsnd_kctrl_max(dvc->volume);
+	else
+		for (i = 0; i < RSND_MAX_CHANNELS; i++)
+			val[i] = rsnd_kctrl_valm(dvc->volume, i);
+
+	/* Enable Digital Volume */
+	for (i = 0; i < RSND_MAX_CHANNELS; i++)
+		rsnd_mod_write(mod, DVC_VOLxR(i), val[i]);
+}
+
+static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
+				 struct rsnd_mod *mod)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	u32 adinr = 0;
+	u32 dvucr = 0;
+	u32 vrctr = 0;
+	u32 vrpdr = 0;
+	u32 vrdbr = 0;
+
+	adinr = rsnd_get_adinr_bit(mod, io) |
+		rsnd_runtime_channel_after_ctu(io);
+
+	/* Enable Digital Volume, Zero Cross Mute Mode */
+	dvucr |= 0x101;
+
+	/* Enable Ramp */
+	if (rsnd_kctrl_vals(dvc->ren)) {
+		dvucr |= 0x10;
+
+		/*
+		 * FIXME !!
+		 * use scale-downed Digital Volume
+		 * as Volume Ramp
+		 * 7F FFFF -> 3FF
+		 */
+		vrctr = 0xff;
+		vrpdr = rsnd_dvc_get_vrpdr(dvc);
+		vrdbr = rsnd_dvc_get_vrdbr(dvc);
+	}
+
+	/* Initialize operation */
+	rsnd_mod_write(mod, DVC_DVUIR, 1);
+
+	/* General Information */
+	rsnd_mod_write(mod, DVC_ADINR, adinr);
+	rsnd_mod_write(mod, DVC_DVUCR, dvucr);
+
+	/* Volume Ramp Parameter */
+	rsnd_mod_write(mod, DVC_VRCTR, vrctr);
+	rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
+	rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
+
+	/* Digital Volume Function Parameter */
+	rsnd_dvc_volume_parameter(io, mod);
+
+	/* cancel operation */
+	rsnd_mod_write(mod, DVC_DVUIR, 0);
+}
+
+static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io,
+				   struct rsnd_mod *mod)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	u32 zcmcr = 0;
+	u32 vrpdr = 0;
+	u32 vrdbr = 0;
+	int i;
+
+	for (i = 0; i < rsnd_kctrl_size(dvc->mute); i++)
+		zcmcr |= (!!rsnd_kctrl_valm(dvc->mute, i)) << i;
+
+	if (rsnd_kctrl_vals(dvc->ren)) {
+		vrpdr = rsnd_dvc_get_vrpdr(dvc);
+		vrdbr = rsnd_dvc_get_vrdbr(dvc);
+	}
+
+	/* Disable DVC Register access */
+	rsnd_mod_write(mod, DVC_DVUER, 0);
+
+	/* Zero Cross Mute Function */
+	rsnd_mod_write(mod, DVC_ZCMCR, zcmcr);
+
+	/* Volume Ramp Function */
+	rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
+	rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
+	/* add DVC_VRWTR here */
+
+	/* Digital Volume Function Parameter */
+	rsnd_dvc_volume_parameter(io, mod);
+
+	/* Enable DVC Register access */
+	rsnd_mod_write(mod, DVC_DVUER, 1);
+}
+
+static int rsnd_dvc_probe_(struct rsnd_mod *mod,
+			   struct rsnd_dai_stream *io,
+			   struct rsnd_priv *priv)
+{
+	return rsnd_cmd_attach(io, rsnd_mod_id(mod));
+}
+
+static int rsnd_dvc_init(struct rsnd_mod *mod,
+			 struct rsnd_dai_stream *io,
+			 struct rsnd_priv *priv)
+{
+	int ret;
+
+	ret = rsnd_mod_power_on(mod);
+	if (ret < 0)
+		return ret;
+
+	rsnd_dvc_activation(mod);
+
+	rsnd_dvc_volume_init(io, mod);
+
+	rsnd_dvc_volume_update(io, mod);
+
+	return 0;
+}
+
+static int rsnd_dvc_quit(struct rsnd_mod *mod,
+			 struct rsnd_dai_stream *io,
+			 struct rsnd_priv *priv)
+{
+	rsnd_dvc_halt(mod);
+
+	rsnd_mod_power_off(mod);
+
+	return 0;
+}
+
+static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
+			    struct rsnd_dai_stream *io,
+			    struct snd_soc_pcm_runtime *rtd)
+{
+	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
+	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
+	int is_play = rsnd_io_is_play(io);
+	int channels = rsnd_rdai_channels_get(rdai);
+	int ret;
+
+	/* Volume */
+	ret = rsnd_kctrl_new_m(mod, io, rtd,
+			is_play ?
+			"DVC Out Playback Volume" : "DVC In Capture Volume",
+			rsnd_kctrl_accept_anytime,
+			rsnd_dvc_volume_update,
+			&dvc->volume, channels,
+			0x00800000 - 1);
+	if (ret < 0)
+		return ret;
+
+	/* Mute */
+	ret = rsnd_kctrl_new_m(mod, io, rtd,
+			is_play ?
+			"DVC Out Mute Switch" : "DVC In Mute Switch",
+			rsnd_kctrl_accept_anytime,
+			rsnd_dvc_volume_update,
+			&dvc->mute, channels,
+			1);
+	if (ret < 0)
+		return ret;
+
+	/* Ramp */
+	ret = rsnd_kctrl_new_s(mod, io, rtd,
+			is_play ?
+			"DVC Out Ramp Switch" : "DVC In Ramp Switch",
+			rsnd_kctrl_accept_anytime,
+			rsnd_dvc_volume_update,
+			&dvc->ren, 1);
+	if (ret < 0)
+		return ret;
+
+	ret = rsnd_kctrl_new_e(mod, io, rtd,
+			is_play ?
+			"DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
+			rsnd_kctrl_accept_anytime,
+			rsnd_dvc_volume_update,
+			&dvc->rup,
+			volume_ramp_rate,
+			VOLUME_RAMP_MAX_DVC);
+	if (ret < 0)
+		return ret;
+
+	ret = rsnd_kctrl_new_e(mod, io, rtd,
+			is_play ?
+			"DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
+			rsnd_kctrl_accept_anytime,
+			rsnd_dvc_volume_update,
+			&dvc->rdown,
+			volume_ramp_rate,
+			VOLUME_RAMP_MAX_DVC);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
+					 struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+
+	return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
+					DVC_NAME, mod, "tx");
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void rsnd_dvc_debug_info(struct seq_file *m,
+				struct rsnd_dai_stream *io,
+				struct rsnd_mod *mod)
+{
+	rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU,
+				  0xe00 + rsnd_mod_id(mod) * 0x100, 0x60);
+}
+#define DEBUG_INFO .debug_info = rsnd_dvc_debug_info
+#else
+#define DEBUG_INFO
+#endif
+
+static struct rsnd_mod_ops rsnd_dvc_ops = {
+	.name		= DVC_NAME,
+	.dma_req	= rsnd_dvc_dma_req,
+	.probe		= rsnd_dvc_probe_,
+	.init		= rsnd_dvc_init,
+	.quit		= rsnd_dvc_quit,
+	.pcm_new	= rsnd_dvc_pcm_new,
+	.get_status	= rsnd_mod_get_status,
+	DEBUG_INFO
+};
+
+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 rsnd_mod_get(rsnd_dvc_get(priv, id));
+}
+
+int rsnd_dvc_probe(struct rsnd_priv *priv)
+{
+	struct device_node *node;
+	struct device_node *np;
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_dvc *dvc;
+	struct clk *clk;
+	char name[RSND_DVC_NAME_SIZE];
+	int i, nr, ret;
+
+	/* This driver doesn't support Gen1 at this point */
+	if (rsnd_is_gen1(priv))
+		return 0;
+
+	node = rsnd_dvc_of_node(priv);
+	if (!node)
+		return 0; /* not used is not error */
+
+	nr = of_get_child_count(node);
+	if (!nr) {
+		ret = -EINVAL;
+		goto rsnd_dvc_probe_done;
+	}
+
+	dvc	= devm_kcalloc(dev, nr, sizeof(*dvc), GFP_KERNEL);
+	if (!dvc) {
+		ret = -ENOMEM;
+		goto rsnd_dvc_probe_done;
+	}
+
+	priv->dvc_nr	= nr;
+	priv->dvc	= dvc;
+
+	i = 0;
+	ret = 0;
+	for_each_child_of_node(node, np) {
+		dvc = rsnd_dvc_get(priv, i);
+
+		snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
+			 DVC_NAME, i);
+
+		clk = devm_clk_get(dev, name);
+		if (IS_ERR(clk)) {
+			ret = PTR_ERR(clk);
+			of_node_put(np);
+			goto rsnd_dvc_probe_done;
+		}
+
+		ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
+				    clk, RSND_MOD_DVC, i);
+		if (ret) {
+			of_node_put(np);
+			goto rsnd_dvc_probe_done;
+		}
+
+		i++;
+	}
+
+rsnd_dvc_probe_done:
+	of_node_put(node);
+
+	return ret;
+}
+
+void rsnd_dvc_remove(struct rsnd_priv *priv)
+{
+	struct rsnd_dvc *dvc;
+	int i;
+
+	for_each_rsnd_dvc(dvc, priv, i) {
+		rsnd_mod_quit(rsnd_mod_get(dvc));
+	}
+}