[linux-2.6-block.git] / sound / soc / sh / rcar / ctu.c

/*
 * 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);
	}
}
Commit	Line	Data
9269e3c3 KM	1	/*
	2	* ctu.c
	3	*
	4	* Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#include "rsnd.h"
	11
	12	#define CTU_NAME_SIZE 16
	13	#define CTU_NAME "ctu"
	14
	15	struct rsnd_ctu {
	16	struct rsnd_ctu_platform_info info; / rcar_snd.h */
	17	struct rsnd_mod mod;
	18	};
	19
	20	#define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
	21	#define for_each_rsnd_ctu(pos, priv, i) \
	22	for ((i) = 0; \
	23	((i) < rsnd_ctu_nr(priv)) && \
	24	((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
	25	i++)
	26
	27	#define rsnd_ctu_initialize_lock(mod) __rsnd_ctu_initialize_lock(mod, 1)
	28	#define rsnd_ctu_initialize_unlock(mod) __rsnd_ctu_initialize_lock(mod, 0)
	29	static void __rsnd_ctu_initialize_lock(struct rsnd_mod *mod, u32 enable)
	30	{
	31	rsnd_mod_write(mod, CTU_CTUIR, enable);
	32	}
	33
	34	static int rsnd_ctu_init(struct rsnd_mod *mod,
	35	struct rsnd_dai_stream *io,
	36	struct rsnd_priv *priv)
	37	{
	38	rsnd_mod_hw_start(mod);
	39
	40	rsnd_ctu_initialize_lock(mod);
	41
	42	rsnd_mod_write(mod, CTU_ADINR, rsnd_get_adinr_chan(mod, io));
	43
	44	rsnd_ctu_initialize_unlock(mod);
	45
	46	return 0;
	47	}
	48
	49	static int rsnd_ctu_quit(struct rsnd_mod *mod,
	50	struct rsnd_dai_stream *io,
	51	struct rsnd_priv *priv)
	52	{
	53	rsnd_mod_hw_stop(mod);
	54
	55	return 0;
	56	}
	57
	58	static struct rsnd_mod_ops rsnd_ctu_ops = {
	59	.name = CTU_NAME,
	60	.init = rsnd_ctu_init,
	61	.quit = rsnd_ctu_quit,
	62	};
	63
	64	struct rsnd_mod rsnd_ctu_mod_get(struct rsnd_priv priv, int id)
65	{
66	if (WARN_ON(id < 0 \|\| id >= rsnd_ctu_nr(priv)))
67	id = 0;
68
69	return &((struct rsnd_ctu *)(priv->ctu) + id)->mod;
70	}
71
e773c2f9	72	static void rsnd_of_parse_ctu(struct platform_device *pdev,
9269e3c3 KM	73	const struct rsnd_of_data *of_data,
	74	struct rsnd_priv *priv)
	75	{
	76	struct device_node *node;
	77	struct rsnd_ctu_platform_info *ctu_info;
	78	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	79	struct device *dev = &pdev->dev;
	80	int nr;
	81
	82	if (!of_data)
	83	return;
	84
	85	node = of_get_child_by_name(dev->of_node, "rcar_sound,ctu");
	86	if (!node)
	87	return;
	88
	89	nr = of_get_child_count(node);
	90	if (!nr)
	91	goto rsnd_of_parse_ctu_end;
	92
	93	ctu_info = devm_kzalloc(dev,
	94	sizeof(struct rsnd_ctu_platform_info) * nr,
	95	GFP_KERNEL);
	96	if (!ctu_info) {
	97	dev_err(dev, "ctu info allocation error\n");
	98	goto rsnd_of_parse_ctu_end;
	99	}
	100
	101	info->ctu_info = ctu_info;
	102	info->ctu_info_nr = nr;
	103
	104	rsnd_of_parse_ctu_end:
	105	of_node_put(node);
	106
	107	}
	108
	109	int rsnd_ctu_probe(struct platform_device *pdev,
	110	const struct rsnd_of_data *of_data,
	111	struct rsnd_priv *priv)
	112	{
	113	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	114	struct device *dev = rsnd_priv_to_dev(priv);
	115	struct rsnd_ctu *ctu;
	116	struct clk *clk;
	117	char name[CTU_NAME_SIZE];
	118	int i, nr, ret;
	119
	120	/* This driver doesn't support Gen1 at this point */
	121	if (rsnd_is_gen1(priv)) {
	122	dev_warn(dev, "CTU is not supported on Gen1\n");
	123	return -EINVAL;
	124	}
	125
	126	rsnd_of_parse_ctu(pdev, of_data, priv);
	127
	128	nr = info->ctu_info_nr;
	129	if (!nr)
	130	return 0;
	131
	132	ctu = devm_kzalloc(dev, sizeof(ctu) nr, GFP_KERNEL);
	133	if (!ctu)
	134	return -ENOMEM;
	135
	136	priv->ctu_nr = nr;
137	priv->ctu = ctu;
138
139	for_each_rsnd_ctu(ctu, priv, i) {
140	/*
141	* CTU00, CTU01, CTU02, CTU03 => CTU0
142	* CTU10, CTU11, CTU12, CTU13 => CTU1
143	*/
144	snprintf(name, CTU_NAME_SIZE, "%s.%d",
145	CTU_NAME, i / 4);
146
147	clk = devm_clk_get(dev, name);
148	if (IS_ERR(clk))
149	return PTR_ERR(clk);
150
151	ctu->info = &info->ctu_info[i];
152
153	ret = rsnd_mod_init(priv, &ctu->mod, &rsnd_ctu_ops,
154	clk, RSND_MOD_CTU, i);
155	if (ret)
156	return ret;
157	}
158
159	return 0;
160	}
161
162	void rsnd_ctu_remove(struct platform_device *pdev,
163	struct rsnd_priv *priv)
164	{
165	struct rsnd_ctu *ctu;
166	int i;
167
168	for_each_rsnd_ctu(ctu, priv, i) {
169	rsnd_mod_quit(&ctu->mod);
170	}
171	}