diff options
Diffstat (limited to 'sound/soc/sh/rcar/ctu.c')
| -rw-r--r-- | sound/soc/sh/rcar/ctu.c | 171 |
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 000000000..05498bba5 --- /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); + } +} |