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>
diff --git a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
new file mode 100644
index 0000000..74769b1
--- /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;
+}