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-rw-r--r--sound/soc/sh/rcar/scu.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/scu.c b/sound/soc/sh/rcar/scu.c
new file mode 100644
index 000000000000..184d9008cecd
--- /dev/null
+++ b/sound/soc/sh/rcar/scu.c
@@ -0,0 +1,236 @@
+/*
+ * Renesas R-Car SCU support
+ *
+ * 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.
+ */
+#include "rsnd.h"
+
+struct rsnd_scu {
+ struct rsnd_scu_platform_info *info; /* rcar_snd.h */
+ struct rsnd_mod mod;
+};
+
+#define rsnd_scu_mode_flags(p) ((p)->info->flags)
+
+/*
+ * ADINR
+ */
+#define OTBL_24 (0 << 16)
+#define OTBL_22 (2 << 16)
+#define OTBL_20 (4 << 16)
+#define OTBL_18 (6 << 16)
+#define OTBL_16 (8 << 16)
+
+
+#define rsnd_mod_to_scu(_mod) \
+ container_of((_mod), struct rsnd_scu, mod)
+
+#define for_each_rsnd_scu(pos, priv, i) \
+ for ((i) = 0; \
+ ((i) < rsnd_scu_nr(priv)) && \
+ ((pos) = (struct rsnd_scu *)(priv)->scu + i); \
+ i++)
+
+static int rsnd_scu_set_route(struct rsnd_priv *priv,
+ struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct scu_route_config {
+ u32 mask;
+ int shift;
+ } routes[] = {
+ { 0xF, 0, }, /* 0 */
+ { 0xF, 4, }, /* 1 */
+ { 0xF, 8, }, /* 2 */
+ { 0x7, 12, }, /* 3 */
+ { 0x7, 16, }, /* 4 */
+ { 0x7, 20, }, /* 5 */
+ { 0x7, 24, }, /* 6 */
+ { 0x3, 28, }, /* 7 */
+ { 0x3, 30, }, /* 8 */
+ };
+
+ u32 mask;
+ u32 val;
+ int shift;
+ int id;
+
+ /*
+ * Gen1 only
+ */
+ if (!rsnd_is_gen1(priv))
+ return 0;
+
+ id = rsnd_mod_id(mod);
+ if (id < 0 || id > ARRAY_SIZE(routes))
+ return -EIO;
+
+ /*
+ * SRC_ROUTE_SELECT
+ */
+ val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
+ val = val << routes[id].shift;
+ mask = routes[id].mask << routes[id].shift;
+
+ rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
+
+ /*
+ * SRC_TIMING_SELECT
+ */
+ shift = (id % 4) * 8;
+ mask = 0x1F << shift;
+ if (8 == id) /* SRU8 is very special */
+ val = id << shift;
+ else
+ val = (id + 1) << shift;
+
+ switch (id / 4) {
+ case 0:
+ rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
+ break;
+ case 1:
+ rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
+ break;
+ case 2:
+ rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
+ break;
+ }
+
+ return 0;
+}
+
+static int rsnd_scu_set_mode(struct rsnd_priv *priv,
+ struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ int id = rsnd_mod_id(mod);
+ u32 val;
+
+ if (rsnd_is_gen1(priv)) {
+ val = (1 << id);
+ rsnd_mod_bset(mod, SRC_CTRL, val, val);
+ }
+
+ return 0;
+}
+
+static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
+ struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+ u32 adinr = runtime->channels;
+
+ switch (runtime->sample_bits) {
+ case 16:
+ adinr |= OTBL_16;
+ break;
+ case 32:
+ adinr |= OTBL_24;
+ break;
+ default:
+ return -EIO;
+ }
+
+ rsnd_mod_write(mod, BUSIF_MODE, 1);
+ rsnd_mod_write(mod, BUSIF_ADINR, adinr);
+
+ return 0;
+}
+
+static int rsnd_scu_start(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ u32 flags = rsnd_scu_mode_flags(scu);
+ int ret;
+
+ /*
+ * SCU will be used if it has RSND_SCU_USB_HPBIF flags
+ */
+ if (!(flags & RSND_SCU_USB_HPBIF)) {
+ /* it use PIO transter */
+ dev_dbg(dev, "%s%d is not used\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ return 0;
+ }
+
+ /* it use DMA transter */
+ ret = rsnd_scu_set_route(priv, mod, rdai, io);
+ if (ret < 0)
+ return ret;
+
+ ret = rsnd_scu_set_mode(priv, mod, rdai, io);
+ if (ret < 0)
+ return ret;
+
+ ret = rsnd_scu_set_hpbif(priv, mod, rdai, io);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(dev, "%s%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ return 0;
+}
+
+static struct rsnd_mod_ops rsnd_scu_ops = {
+ .name = "scu",
+ .start = rsnd_scu_start,
+};
+
+struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id)
+{
+ BUG_ON(id < 0 || id >= rsnd_scu_nr(priv));
+
+ return &((struct rsnd_scu *)(priv->scu) + id)->mod;
+}
+
+int rsnd_scu_probe(struct platform_device *pdev,
+ struct rcar_snd_info *info,
+ struct rsnd_priv *priv)
+{
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_scu *scu;
+ int i, nr;
+
+ /*
+ * init SCU
+ */
+ nr = info->scu_info_nr;
+ scu = devm_kzalloc(dev, sizeof(*scu) * nr, GFP_KERNEL);
+ if (!scu) {
+ dev_err(dev, "SCU allocate failed\n");
+ return -ENOMEM;
+ }
+
+ priv->scu_nr = nr;
+ priv->scu = scu;
+
+ for_each_rsnd_scu(scu, priv, i) {
+ rsnd_mod_init(priv, &scu->mod,
+ &rsnd_scu_ops, i);
+ scu->info = &info->scu_info[i];
+
+ dev_dbg(dev, "SCU%d probed\n", i);
+ }
+ dev_dbg(dev, "scu probed\n");
+
+ return 0;
+}
+
+void rsnd_scu_remove(struct platform_device *pdev,
+ struct rsnd_priv *priv)
+{
+}