ASoC: add Renesas R-Car module feature

Renesas R-Car series sound circuit consists of SSI and its peripheral.
But this peripheral circuit is different between
R-Car Generation1 (E1/M1/H1) and Generation2 (E2/M2/H2)
(Actually, there are many difference in Generation1 chips)

Gen1 series consists of SRU/SSI/ADG, and
Gen2 series consists of SCU/SSIU/SSI/ADG.

In order to control these by same method,
these are treated as "mod" on this driver.

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

sound/soc/sh/rcar/core.c

@@ -107,9 +107,74 @@
 	 priv->info->func(param))
 
 
+/*
+ *	rsnd_mod functions
+ */
+char *rsnd_mod_name(struct rsnd_mod *mod)
+{
+	if (!mod || !mod->ops)
+		return "unknown";
+
+	return mod->ops->name;
+}
+
+void rsnd_mod_init(struct rsnd_priv *priv,
+		   struct rsnd_mod *mod,
+		   struct rsnd_mod_ops *ops,
+		   int id)
+{
+	mod->priv	= priv;
+	mod->id		= id;
+	mod->ops	= ops;
+	INIT_LIST_HEAD(&mod->list);
+}
+
 /*
  *	rsnd_dai functions
  */
+#define rsnd_dai_call(rdai, io, fn)			\
+({							\
+	struct rsnd_mod *mod, *n;			\
+	int ret = 0;					\
+	for_each_rsnd_mod(mod, n, io) {			\
+		ret = rsnd_mod_call(mod, fn, rdai, io);	\
+		if (ret < 0)				\
+			break;				\
+	}						\
+	ret;						\
+})
+
+int rsnd_dai_connect(struct rsnd_dai *rdai,
+		     struct rsnd_mod *mod,
+		     struct rsnd_dai_stream *io)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+
+	if (!mod) {
+		dev_err(dev, "NULL mod\n");
+		return -EIO;
+	}
+
+	if (!list_empty(&mod->list)) {
+		dev_err(dev, "%s%d is not empty\n",
+			rsnd_mod_name(mod),
+			rsnd_mod_id(mod));
+		return -EIO;
+	}
+
+	list_add_tail(&mod->list, &io->head);
+
+	return 0;
+}
+
+int rsnd_dai_disconnect(struct rsnd_mod *mod)
+{
+	list_del_init(&mod->list);
+
+	return 0;
+}
+
 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 {
 	return priv->rdai + id;
@@ -224,8 +289,23 @@ static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 		if (ret < 0)
 			goto dai_trigger_end;
 
+		ret = rsnd_dai_call(rdai, io, init);
+		if (ret < 0)
+			goto dai_trigger_end;
+
+		ret = rsnd_dai_call(rdai, io, start);
+		if (ret < 0)
+			goto dai_trigger_end;
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
+		ret = rsnd_dai_call(rdai, io, stop);
+		if (ret < 0)
+			goto dai_trigger_end;
+
+		ret = rsnd_dai_call(rdai, io, quit);
+		if (ret < 0)
+			goto dai_trigger_end;
+
 		ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 		if (ret < 0)
 			goto dai_trigger_end;

sound/soc/sh/rcar/rsnd.h

@@ -28,9 +28,52 @@
  * see gen1/gen2 for detail
  */
 struct rsnd_priv;
+struct rsnd_mod;
 struct rsnd_dai;
 struct rsnd_dai_stream;
 
+/*
+ *	R-Car sound mod
+ */
+
+struct rsnd_mod_ops {
+	char *name;
+	int (*init)(struct rsnd_mod *mod,
+		    struct rsnd_dai *rdai,
+		    struct rsnd_dai_stream *io);
+	int (*quit)(struct rsnd_mod *mod,
+		    struct rsnd_dai *rdai,
+		    struct rsnd_dai_stream *io);
+	int (*start)(struct rsnd_mod *mod,
+		     struct rsnd_dai *rdai,
+		     struct rsnd_dai_stream *io);
+	int (*stop)(struct rsnd_mod *mod,
+		    struct rsnd_dai *rdai,
+		    struct rsnd_dai_stream *io);
+};
+
+struct rsnd_mod {
+	int id;
+	struct rsnd_priv *priv;
+	struct rsnd_mod_ops *ops;
+	struct list_head list; /* connect to rsnd_dai playback/capture */
+};
+
+#define rsnd_mod_to_priv(mod) ((mod)->priv)
+#define rsnd_mod_id(mod) ((mod)->id)
+#define for_each_rsnd_mod(pos, n, io)	\
+	list_for_each_entry_safe(pos, n, &(io)->head, list)
+#define rsnd_mod_call(mod, func, rdai, io)	\
+	(!(mod) ? -ENODEV :			\
+	 !((mod)->ops->func) ? 0 :		\
+	 (mod)->ops->func(mod, rdai, io))
+
+void rsnd_mod_init(struct rsnd_priv *priv,
+		   struct rsnd_mod *mod,
+		   struct rsnd_mod_ops *ops,
+		   int id);
+char *rsnd_mod_name(struct rsnd_mod *mod);
+
 /*
  *	R-Car sound DAI
  */
@@ -64,6 +107,9 @@ struct rsnd_dai {
 	     i++, (rdai) = rsnd_dai_get(priv, i))
 
 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id);
+int rsnd_dai_disconnect(struct rsnd_mod *mod);
+int rsnd_dai_connect(struct rsnd_dai *rdai, struct rsnd_mod *mod,
+		     struct rsnd_dai_stream *io);
 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io);
 #define rsnd_dai_get_platform_info(rdai) ((rdai)->info)