ASoC: add Renesas R-Car core feature
Renesas R-Car series sound circuit consists of SSI and its peripheral.
But this peripheral circuits are different between
R-Car Generation1 (E1/M1/H1) and Generation2 (E2/M2/H2).
(Actually, there are many difference in Generation1 chips)
Basically, for the future, Renesas R-Car series will use
Gen2 style sound circuit, but driver should care Gen1 also.
The main differences between Gen1 and Gen2 peripheral
are 1) register offset, 2) data path.
This patch adds basic (core) feature for R-Car
series sound driver as prototype
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/rsnd.h b/sound/soc/sh/rcar/rsnd.h
new file mode 100644
index 0000000..8d04fd0
--- /dev/null
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -0,0 +1,94 @@
+/*
+ * Renesas R-Car
+ *
+ * Copyright (C) 2013 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.
+ */
+#ifndef RSND_H
+#define RSND_H
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <sound/rcar_snd.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+/*
+ * pseudo register
+ *
+ * The register address offsets SRU/SCU/SSIU on Gen1/Gen2 are very different.
+ * This driver uses pseudo register in order to hide it.
+ * see gen1/gen2 for detail
+ */
+struct rsnd_priv;
+struct rsnd_dai;
+struct rsnd_dai_stream;
+
+/*
+ * R-Car sound DAI
+ */
+#define RSND_DAI_NAME_SIZE 16
+struct rsnd_dai_stream {
+ struct list_head head; /* head of rsnd_mod list */
+ struct snd_pcm_substream *substream;
+ int byte_pos;
+ int period_pos;
+ int byte_per_period;
+ int next_period_byte;
+};
+
+struct rsnd_dai {
+ char name[RSND_DAI_NAME_SIZE];
+ struct rsnd_dai_platform_info *info; /* rcar_snd.h */
+ struct rsnd_dai_stream playback;
+ struct rsnd_dai_stream capture;
+
+ int clk_master:1;
+ int bit_clk_inv:1;
+ int frm_clk_inv:1;
+ int sys_delay:1;
+ int data_alignment:1;
+};
+
+#define rsnd_dai_nr(priv) ((priv)->dai_nr)
+#define for_each_rsnd_dai(rdai, priv, i) \
+ for (i = 0, (rdai) = rsnd_dai_get(priv, i); \
+ i < rsnd_dai_nr(priv); \
+ i++, (rdai) = rsnd_dai_get(priv, i))
+
+struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id);
+int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io);
+#define rsnd_dai_get_platform_info(rdai) ((rdai)->info)
+
+void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int cnt);
+int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional);
+
+/*
+ * R-Car sound priv
+ */
+struct rsnd_priv {
+
+ struct device *dev;
+ struct rcar_snd_info *info;
+ spinlock_t lock;
+
+ /*
+ * below value will be filled on rsnd_dai_probe()
+ */
+ struct snd_soc_dai_driver *daidrv;
+ struct rsnd_dai *rdai;
+ int dai_nr;
+};
+
+#define rsnd_priv_to_dev(priv) ((priv)->dev)
+#define rsnd_lock(priv, flags) spin_lock_irqsave(&priv->lock, flags)
+#define rsnd_unlock(priv, flags) spin_unlock_irqrestore(&priv->lock, flags)
+
+#endif