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@@ -0,0 +1,171 @@
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+/*
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+ * ctu.c
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+ *
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+ * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+#include "rsnd.h"
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+
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+#define CTU_NAME_SIZE 16
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+#define CTU_NAME "ctu"
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+
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+struct rsnd_ctu {
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+ struct rsnd_ctu_platform_info *info; /* rcar_snd.h */
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+ struct rsnd_mod mod;
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+};
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+
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+#define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
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+#define for_each_rsnd_ctu(pos, priv, i) \
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+ for ((i) = 0; \
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+ ((i) < rsnd_ctu_nr(priv)) && \
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+ ((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
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+ i++)
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+
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+#define rsnd_ctu_initialize_lock(mod) __rsnd_ctu_initialize_lock(mod, 1)
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+#define rsnd_ctu_initialize_unlock(mod) __rsnd_ctu_initialize_lock(mod, 0)
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+static void __rsnd_ctu_initialize_lock(struct rsnd_mod *mod, u32 enable)
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+{
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+ rsnd_mod_write(mod, CTU_CTUIR, enable);
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+}
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+
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+static int rsnd_ctu_init(struct rsnd_mod *mod,
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+ struct rsnd_dai_stream *io,
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+ struct rsnd_priv *priv)
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+{
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+ rsnd_mod_hw_start(mod);
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+
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+ rsnd_ctu_initialize_lock(mod);
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+
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+ rsnd_mod_write(mod, CTU_ADINR, rsnd_get_adinr_chan(mod, io));
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+
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+ rsnd_ctu_initialize_unlock(mod);
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+
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+ return 0;
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+}
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+
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+static int rsnd_ctu_quit(struct rsnd_mod *mod,
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+ struct rsnd_dai_stream *io,
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+ struct rsnd_priv *priv)
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+{
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+ rsnd_mod_hw_stop(mod);
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+
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+ return 0;
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+}
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+
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+static struct rsnd_mod_ops rsnd_ctu_ops = {
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+ .name = CTU_NAME,
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+ .init = rsnd_ctu_init,
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+ .quit = rsnd_ctu_quit,
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+};
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+
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+struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
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+{
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+ if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
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+ id = 0;
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+
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+ return &((struct rsnd_ctu *)(priv->ctu) + id)->mod;
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+}
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+
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+void rsnd_of_parse_ctu(struct platform_device *pdev,
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+ const struct rsnd_of_data *of_data,
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+ struct rsnd_priv *priv)
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+{
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+ struct device_node *node;
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+ struct rsnd_ctu_platform_info *ctu_info;
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+ struct rcar_snd_info *info = rsnd_priv_to_info(priv);
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+ struct device *dev = &pdev->dev;
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+ int nr;
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+
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+ if (!of_data)
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+ return;
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+
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+ node = of_get_child_by_name(dev->of_node, "rcar_sound,ctu");
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+ if (!node)
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+ return;
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+
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+ nr = of_get_child_count(node);
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+ if (!nr)
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+ goto rsnd_of_parse_ctu_end;
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+
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+ ctu_info = devm_kzalloc(dev,
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+ sizeof(struct rsnd_ctu_platform_info) * nr,
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+ GFP_KERNEL);
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+ if (!ctu_info) {
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+ dev_err(dev, "ctu info allocation error\n");
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+ goto rsnd_of_parse_ctu_end;
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+ }
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+
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+ info->ctu_info = ctu_info;
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+ info->ctu_info_nr = nr;
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+
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+rsnd_of_parse_ctu_end:
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+ of_node_put(node);
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+
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+}
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+
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+int rsnd_ctu_probe(struct platform_device *pdev,
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+ const struct rsnd_of_data *of_data,
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+ struct rsnd_priv *priv)
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+{
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+ struct rcar_snd_info *info = rsnd_priv_to_info(priv);
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+ struct device *dev = rsnd_priv_to_dev(priv);
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+ struct rsnd_ctu *ctu;
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+ struct clk *clk;
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+ char name[CTU_NAME_SIZE];
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+ int i, nr, ret;
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+
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+ /* This driver doesn't support Gen1 at this point */
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+ if (rsnd_is_gen1(priv)) {
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+ dev_warn(dev, "CTU is not supported on Gen1\n");
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+ return -EINVAL;
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+ }
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+
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+ rsnd_of_parse_ctu(pdev, of_data, priv);
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+
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+ nr = info->ctu_info_nr;
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+ if (!nr)
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+ return 0;
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+
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+ ctu = devm_kzalloc(dev, sizeof(*ctu) * nr, GFP_KERNEL);
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+ if (!ctu)
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+ return -ENOMEM;
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+
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+ priv->ctu_nr = nr;
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+ priv->ctu = ctu;
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+
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+ for_each_rsnd_ctu(ctu, priv, i) {
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+ /*
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+ * CTU00, CTU01, CTU02, CTU03 => CTU0
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+ * CTU10, CTU11, CTU12, CTU13 => CTU1
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+ */
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+ snprintf(name, CTU_NAME_SIZE, "%s.%d",
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+ CTU_NAME, i / 4);
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+
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+ clk = devm_clk_get(dev, name);
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+ if (IS_ERR(clk))
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+ return PTR_ERR(clk);
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+
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+ ctu->info = &info->ctu_info[i];
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+
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+ ret = rsnd_mod_init(priv, &ctu->mod, &rsnd_ctu_ops,
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+ clk, RSND_MOD_CTU, i);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+void rsnd_ctu_remove(struct platform_device *pdev,
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+ struct rsnd_priv *priv)
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+{
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+ struct rsnd_ctu *ctu;
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+ int i;
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+
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+ for_each_rsnd_ctu(ctu, priv, i) {
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+ rsnd_mod_quit(&ctu->mod);
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+ }
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+}
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Kuninori Morimoto