[deliverable/linux.git] / sound / soc / sh / rcar / scu.c

/*
 * Renesas R-Car SCU support
 *
 * Copyright (C) 2013 Renesas Solutions Corp.
 * 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"

struct rsnd_scu {
	struct rsnd_scu_platform_info *info; /* rcar_snd.h */
	struct rsnd_mod mod;
};

#define rsnd_scu_mode_flags(p) ((p)->info->flags)

/*
 * ADINR
 */
#define OTBL_24		(0 << 16)
#define OTBL_22		(2 << 16)
#define OTBL_20		(4 << 16)
#define OTBL_18		(6 << 16)
#define OTBL_16		(8 << 16)


#define rsnd_mod_to_scu(_mod)	\
	container_of((_mod), struct rsnd_scu, mod)

#define for_each_rsnd_scu(pos, priv, i)					\
	for ((i) = 0;							\
	     ((i) < rsnd_scu_nr(priv)) &&				\
		     ((pos) = (struct rsnd_scu *)(priv)->scu + i);	\
	     i++)

/* Gen1 only */
static int rsnd_src_set_route_if_gen1(struct rsnd_priv *priv,
			      struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	struct scu_route_config {
		u32 mask;
		int shift;
	} routes[] = {
		{ 0xF,  0, }, /* 0 */
		{ 0xF,  4, }, /* 1 */
		{ 0xF,  8, }, /* 2 */
		{ 0x7, 12, }, /* 3 */
		{ 0x7, 16, }, /* 4 */
		{ 0x7, 20, }, /* 5 */
		{ 0x7, 24, }, /* 6 */
		{ 0x3, 28, }, /* 7 */
		{ 0x3, 30, }, /* 8 */
	};

	u32 mask;
	u32 val;
	int shift;
	int id;

	/*
	 * Gen1 only
	 */
	if (!rsnd_is_gen1(priv))
		return 0;

	id = rsnd_mod_id(mod);
	if (id < 0 || id > ARRAY_SIZE(routes))
		return -EIO;

	/*
	 * SRC_ROUTE_SELECT
	 */
	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	val = val		<< routes[id].shift;
	mask = routes[id].mask	<< routes[id].shift;

	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);

	/*
	 * SRC_TIMING_SELECT
	 */
	shift	= (id % 4) * 8;
	mask	= 0x1F << shift;
	if (8 == id) /* SRU8 is very special */
		val = id << shift;
	else
		val = (id + 1) << shift;

	switch (id / 4) {
	case 0:
		rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
		break;
	case 1:
		rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
		break;
	case 2:
		rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
		break;
	}

	return 0;
}

static int rsnd_scu_set_mode(struct rsnd_priv *priv,
			     struct rsnd_mod *mod,
			     struct rsnd_dai *rdai,
			     struct rsnd_dai_stream *io)
{
	int id = rsnd_mod_id(mod);
	u32 val;

	if (rsnd_is_gen1(priv)) {
		val = (1 << id);
		rsnd_mod_bset(mod, SRC_ROUTE_CTRL, val, val);
	}

	return 0;
}

static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
			      struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	u32 adinr = runtime->channels;

	switch (runtime->sample_bits) {
	case 16:
		adinr |= OTBL_16;
		break;
	case 32:
		adinr |= OTBL_24;
		break;
	default:
		return -EIO;
	}

	rsnd_mod_write(mod, BUSIF_MODE, 1);
	rsnd_mod_write(mod, SRC_ADINR, adinr);

	return 0;
}

bool rsnd_scu_hpbif_is_enable(struct rsnd_mod *mod)
{
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	u32 flags = rsnd_scu_mode_flags(scu);

	return !!(flags & RSND_SCU_USE_HPBIF);
}

static int rsnd_scu_start(struct rsnd_mod *mod,
			  struct rsnd_dai *rdai,
			  struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct device *dev = rsnd_priv_to_dev(priv);
	int ret;

	/*
	 * SCU will be used if it has RSND_SCU_USE_HPBIF flags
	 */
	if (!rsnd_scu_hpbif_is_enable(mod)) {
		/* it use PIO transter */
		dev_dbg(dev, "%s%d is not used\n",
			rsnd_mod_name(mod), rsnd_mod_id(mod));

		return 0;
	}

	/* it use DMA transter */

	ret = rsnd_src_set_route_if_gen1(priv, mod, rdai, io);
	if (ret < 0)
		return ret;

	ret = rsnd_scu_set_mode(priv, mod, rdai, io);
	if (ret < 0)
		return ret;

	ret = rsnd_scu_set_hpbif(priv, mod, rdai, io);
	if (ret < 0)
		return ret;

	dev_dbg(dev, "%s%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));

	return 0;
}

static struct rsnd_mod_ops rsnd_scu_ops = {
	.name	= "scu",
	.start	= rsnd_scu_start,
};

struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id)
{
	BUG_ON(id < 0 || id >= rsnd_scu_nr(priv));

	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
}

int rsnd_scu_probe(struct platform_device *pdev,
		   struct rcar_snd_info *info,
		   struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_scu *scu;
	int i, nr;

	/*
	 * init SCU
	 */
	nr	= info->scu_info_nr;
	scu	= devm_kzalloc(dev, sizeof(*scu) * nr, GFP_KERNEL);
	if (!scu) {
		dev_err(dev, "SCU allocate failed\n");
		return -ENOMEM;
	}

	priv->scu_nr	= nr;
	priv->scu	= scu;

	for_each_rsnd_scu(scu, priv, i) {
		rsnd_mod_init(priv, &scu->mod,
			      &rsnd_scu_ops, i);
		scu->info = &info->scu_info[i];

		dev_dbg(dev, "SCU%d probed\n", i);
	}
	dev_dbg(dev, "scu probed\n");

	return 0;
}

void rsnd_scu_remove(struct platform_device *pdev,
		     struct rsnd_priv *priv)
{
}
Commit	Line	Data
07539c1d KM	1	/*
	2	* Renesas R-Car SCU support
	3	*
	4	* Copyright (C) 2013 Renesas Solutions Corp.
	5	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include "rsnd.h"
	12
	13	struct rsnd_scu {
	14	struct rsnd_scu_platform_info info; / rcar_snd.h */
	15	struct rsnd_mod mod;
	16	};
	17
374a5281 KM	18	#define rsnd_scu_mode_flags(p) ((p)->info->flags)
	19
	20	/*
	21	* ADINR
	22	*/
	23	#define OTBL_24 (0 << 16)
	24	#define OTBL_22 (2 << 16)
	25	#define OTBL_20 (4 << 16)
	26	#define OTBL_18 (6 << 16)
	27	#define OTBL_16 (8 << 16)
	28
	29
07539c1d KM	30	#define rsnd_mod_to_scu(_mod) \
	31	container_of((_mod), struct rsnd_scu, mod)
	32
	33	#define for_each_rsnd_scu(pos, priv, i) \
	34	for ((i) = 0; \
	35	((i) < rsnd_scu_nr(priv)) && \
	36	((pos) = (struct rsnd_scu *)(priv)->scu + i); \
	37	i++)
	38
2582718c KM	39	/* Gen1 only */
2582718c KM	40	static int rsnd_src_set_route_if_gen1(struct rsnd_priv *priv,
374a5281 KM	41	struct rsnd_mod *mod,
	42	struct rsnd_dai *rdai,
	43	struct rsnd_dai_stream *io)
	44	{
	45	struct scu_route_config {
	46	u32 mask;
	47	int shift;
	48	} routes[] = {
	49	{ 0xF, 0, }, /* 0 */
	50	{ 0xF, 4, }, /* 1 */
	51	{ 0xF, 8, }, /* 2 */
	52	{ 0x7, 12, }, /* 3 */
	53	{ 0x7, 16, }, /* 4 */
	54	{ 0x7, 20, }, /* 5 */
	55	{ 0x7, 24, }, /* 6 */
	56	{ 0x3, 28, }, /* 7 */
	57	{ 0x3, 30, }, /* 8 */
	58	};
	59
	60	u32 mask;
	61	u32 val;
	62	int shift;
	63	int id;
	64
	65	/*
	66	* Gen1 only
	67	*/
	68	if (!rsnd_is_gen1(priv))
	69	return 0;
	70
	71	id = rsnd_mod_id(mod);
	72	if (id < 0 \|\| id > ARRAY_SIZE(routes))
	73	return -EIO;
	74
	75	/*
	76	* SRC_ROUTE_SELECT
	77	*/
	78	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	79	val = val << routes[id].shift;
	80	mask = routes[id].mask << routes[id].shift;
	81
	82	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
	83
	84	/*
	85	* SRC_TIMING_SELECT
	86	*/
	87	shift = (id % 4) * 8;
	88	mask = 0x1F << shift;
	89	if (8 == id) /* SRU8 is very special */
	90	val = id << shift;
	91	else
	92	val = (id + 1) << shift;
	93
	94	switch (id / 4) {
	95	case 0:
	96	rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
	97	break;
	98	case 1:
	99	rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
	100	break;
	101	case 2:
	102	rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
	103	break;
	104	}
105
106	return 0;
107	}
108
109	static int rsnd_scu_set_mode(struct rsnd_priv *priv,
110	struct rsnd_mod *mod,
111	struct rsnd_dai *rdai,
112	struct rsnd_dai_stream *io)
113	{
114	int id = rsnd_mod_id(mod);
115	u32 val;
116
117	if (rsnd_is_gen1(priv)) {
118	val = (1 << id);
690ef81e	119	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, val, val);
374a5281 KM	120	}
	121
	122	return 0;
	123	}
	124
	125	static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
	126	struct rsnd_mod *mod,
	127	struct rsnd_dai *rdai,
	128	struct rsnd_dai_stream *io)
	129	{
	130	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	131	u32 adinr = runtime->channels;
	132
	133	switch (runtime->sample_bits) {
	134	case 16:
	135	adinr \|= OTBL_16;
	136	break;
	137	case 32:
	138	adinr \|= OTBL_24;
	139	break;
	140	default:
	141	return -EIO;
	142	}
	143
	144	rsnd_mod_write(mod, BUSIF_MODE, 1);
690ef81e	145	rsnd_mod_write(mod, SRC_ADINR, adinr);
374a5281 KM	146
	147	return 0;
	148	}
	149
cdcfcac9 KM	150	bool rsnd_scu_hpbif_is_enable(struct rsnd_mod *mod)
	151	{
	152	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	153	u32 flags = rsnd_scu_mode_flags(scu);
	154
	155	return !!(flags & RSND_SCU_USE_HPBIF);
	156	}
	157
07539c1d KM	158	static int rsnd_scu_start(struct rsnd_mod *mod,
	159	struct rsnd_dai *rdai,
	160	struct rsnd_dai_stream *io)
	161	{
	162	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	163	struct device *dev = rsnd_priv_to_dev(priv);
374a5281 KM	164	int ret;
	165
	166	/*
34e44475	167	* SCU will be used if it has RSND_SCU_USE_HPBIF flags
374a5281	168	*/
cdcfcac9	169	if (!rsnd_scu_hpbif_is_enable(mod)) {
374a5281 KM	170	/* it use PIO transter */
	171	dev_dbg(dev, "%s%d is not used\n",
	172	rsnd_mod_name(mod), rsnd_mod_id(mod));
	173
	174	return 0;
	175	}
	176
	177	/* it use DMA transter */
2582718c KM	178
2582718c KM	179	ret = rsnd_src_set_route_if_gen1(priv, mod, rdai, io);
374a5281 KM	180	if (ret < 0)
	181	return ret;
	182
	183	ret = rsnd_scu_set_mode(priv, mod, rdai, io);
	184	if (ret < 0)
	185	return ret;
07539c1d	186
374a5281 KM	187	ret = rsnd_scu_set_hpbif(priv, mod, rdai, io);
	188	if (ret < 0)
	189	return ret;
	190
	191	dev_dbg(dev, "%s%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
07539c1d KM	192
	193	return 0;
	194	}
	195
07539c1d KM	196	static struct rsnd_mod_ops rsnd_scu_ops = {
07539c1d KM	197	.name = "scu",
07539c1d	198	.start = rsnd_scu_start,
07539c1d KM	199	};
	200
	201	struct rsnd_mod rsnd_scu_mod_get(struct rsnd_priv priv, int id)
	202	{
	203	BUG_ON(id < 0 \|\| id >= rsnd_scu_nr(priv));
	204
	205	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
	206	}
	207
	208	int rsnd_scu_probe(struct platform_device *pdev,
	209	struct rcar_snd_info *info,
	210	struct rsnd_priv *priv)
	211	{
	212	struct device *dev = rsnd_priv_to_dev(priv);
	213	struct rsnd_scu *scu;
	214	int i, nr;
	215
	216	/*
	217	* init SCU
	218	*/
	219	nr = info->scu_info_nr;
	220	scu = devm_kzalloc(dev, sizeof(scu) nr, GFP_KERNEL);
	221	if (!scu) {
	222	dev_err(dev, "SCU allocate failed\n");
	223	return -ENOMEM;
	224	}
	225
	226	priv->scu_nr = nr;
	227	priv->scu = scu;
	228
	229	for_each_rsnd_scu(scu, priv, i) {
	230	rsnd_mod_init(priv, &scu->mod,
	231	&rsnd_scu_ops, i);
	232	scu->info = &info->scu_info[i];
07539c1d	233
374a5281 KM	234	dev_dbg(dev, "SCU%d probed\n", i);
374a5281 KM	235	}
07539c1d KM	236	dev_dbg(dev, "scu probed\n");
	237
	238	return 0;
	239	}
	240
	241	void rsnd_scu_remove(struct platform_device *pdev,
	242	struct rsnd_priv *priv)
	243	{
	244	}