These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / sound / soc / sh / rcar / ctu.c

diff --git a/kernel/sound/soc/sh/rcar/ctu.c b/kernel/sound/soc/sh/rcar/ctu.c
new file mode 100644 (file)
index 0000000..3cb214a
--- /dev/null
+++ b/kernel/sound/soc/sh/rcar/ctu.c
@@ -0,0 +1,169 @@
+/*
+ * 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_power_on(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_power_off(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 rsnd_mod_get((struct rsnd_ctu *)(priv->ctu) + id);
+}
+
+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))
+               return 0;
+
+       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, rsnd_mod_get(ctu), &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(rsnd_mod_get(ctu));
+       }
+}