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Diffstat (limited to 'sound/soc/sh/rcar/ctu.c')
-rw-r--r--sound/soc/sh/rcar/ctu.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/ctu.c b/sound/soc/sh/rcar/ctu.c
new file mode 100644
index 000000000000..05498bba5874
--- /dev/null
+++ b/sound/soc/sh/rcar/ctu.c
@@ -0,0 +1,171 @@
+/*
+ * ctu.c
+ *
+ * Copyright (c) 2015 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 CTU_NAME_SIZE 16
+#define CTU_NAME "ctu"
+
+struct rsnd_ctu {
+ struct rsnd_ctu_platform_info *info; /* rcar_snd.h */
+ struct rsnd_mod mod;
+};
+
+#define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
+#define for_each_rsnd_ctu(pos, priv, i) \
+ for ((i) = 0; \
+ ((i) < rsnd_ctu_nr(priv)) && \
+ ((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
+ i++)
+
+#define rsnd_ctu_initialize_lock(mod) __rsnd_ctu_initialize_lock(mod, 1)
+#define rsnd_ctu_initialize_unlock(mod) __rsnd_ctu_initialize_lock(mod, 0)
+static void __rsnd_ctu_initialize_lock(struct rsnd_mod *mod, u32 enable)
+{
+ rsnd_mod_write(mod, CTU_CTUIR, enable);
+}
+
+static int rsnd_ctu_init(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ rsnd_mod_hw_start(mod);
+
+ rsnd_ctu_initialize_lock(mod);
+
+ rsnd_mod_write(mod, CTU_ADINR, rsnd_get_adinr_chan(mod, io));
+
+ rsnd_ctu_initialize_unlock(mod);
+
+ return 0;
+}
+
+static int rsnd_ctu_quit(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ rsnd_mod_hw_stop(mod);
+
+ return 0;
+}
+
+static struct rsnd_mod_ops rsnd_ctu_ops = {
+ .name = CTU_NAME,
+ .init = rsnd_ctu_init,
+ .quit = rsnd_ctu_quit,
+};
+
+struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
+{
+ if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
+ id = 0;
+
+ return &((struct rsnd_ctu *)(priv->ctu) + id)->mod;
+}
+
+static void rsnd_of_parse_ctu(struct platform_device *pdev,
+ const struct rsnd_of_data *of_data,
+ struct rsnd_priv *priv)
+{
+ struct device_node *node;
+ struct rsnd_ctu_platform_info *ctu_info;
+ struct rcar_snd_info *info = rsnd_priv_to_info(priv);
+ struct device *dev = &pdev->dev;
+ int nr;
+
+ if (!of_data)
+ return;
+
+ node = of_get_child_by_name(dev->of_node, "rcar_sound,ctu");
+ if (!node)
+ return;
+
+ nr = of_get_child_count(node);
+ if (!nr)
+ goto rsnd_of_parse_ctu_end;
+
+ ctu_info = devm_kzalloc(dev,
+ sizeof(struct rsnd_ctu_platform_info) * nr,
+ GFP_KERNEL);
+ if (!ctu_info) {
+ dev_err(dev, "ctu info allocation error\n");
+ goto rsnd_of_parse_ctu_end;
+ }
+
+ info->ctu_info = ctu_info;
+ info->ctu_info_nr = nr;
+
+rsnd_of_parse_ctu_end:
+ of_node_put(node);
+
+}
+
+int rsnd_ctu_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_ctu *ctu;
+ struct clk *clk;
+ char name[CTU_NAME_SIZE];
+ int i, nr, ret;
+
+ /* This driver doesn't support Gen1 at this point */
+ if (rsnd_is_gen1(priv)) {
+ dev_warn(dev, "CTU is not supported on Gen1\n");
+ return -EINVAL;
+ }
+
+ rsnd_of_parse_ctu(pdev, of_data, priv);
+
+ nr = info->ctu_info_nr;
+ if (!nr)
+ return 0;
+
+ ctu = devm_kzalloc(dev, sizeof(*ctu) * nr, GFP_KERNEL);
+ if (!ctu)
+ return -ENOMEM;
+
+ priv->ctu_nr = nr;
+ priv->ctu = ctu;
+
+ for_each_rsnd_ctu(ctu, priv, i) {
+ /*
+ * CTU00, CTU01, CTU02, CTU03 => CTU0
+ * CTU10, CTU11, CTU12, CTU13 => CTU1
+ */
+ snprintf(name, CTU_NAME_SIZE, "%s.%d",
+ CTU_NAME, i / 4);
+
+ clk = devm_clk_get(dev, name);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ ctu->info = &info->ctu_info[i];
+
+ ret = rsnd_mod_init(priv, &ctu->mod, &rsnd_ctu_ops,
+ clk, RSND_MOD_CTU, i);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+void rsnd_ctu_remove(struct platform_device *pdev,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_ctu *ctu;
+ int i;
+
+ for_each_rsnd_ctu(ctu, priv, i) {
+ rsnd_mod_quit(&ctu->mod);
+ }
+}