[linux-2.6-block.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;
	struct clk *clk;
};

#define RSND_SCU_NAME_SIZE 16

/*
 * 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_scu_mode_flags(p) ((p)->info->flags)
#define rsnd_scu_convert_rate(p) ((p)->info->convert_rate)
#define rsnd_mod_to_scu(_mod)				\
	container_of((_mod), struct rsnd_scu, mod)
#define rsnd_scu_hpbif_is_enable(scu)	\
	(rsnd_scu_mode_flags(scu) & RSND_SCU_USE_HPBIF)

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


/*
 *		image of SRC (Sampling Rate Converter)
 *
 * 96kHz   <-> +-----+	48kHz	+-----+	 48kHz	+-------+
 * 48kHz   <-> | SRC | <------>	| SSI |	<----->	| codec |
 * 44.1kHz <-> +-----+		+-----+		+-------+
 * ...
 *
 */

/*
 * scu.c is caring...
 *
 * Gen1
 *
 * [mem] -> [SRU] -> [SSI]
 *        |--------|
 *
 * Gen2
 *
 * [mem] -> [SCU] -> [SSIU] -> [SSI]
 *        |-----------------|
 */

/*
 *	How to use SRC bypass mode for debugging
 *
 * SRC has bypass mode, and it is useful for debugging.
 * In Gen2 case,
 * SRCm_MODE controls whether SRC is used or not
 * SSI_MODE0 controls whether SSIU which receives SRC data
 * is used or not.
 * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
 * but SRC bypass mode needs SSI_MODE0 only.
 *
 * This driver request
 * struct rsnd_scu_platform_info {
 *	u32 flags;
 *	u32 convert_rate;
 * }
 *
 * rsnd_scu_hpbif_is_enable() will be true
 * if flags had RSND_SCU_USE_HPBIF,
 * and it controls whether SSIU is used or not.
 *
 * rsnd_scu_convert_rate() indicates
 * above convert_rate, and it controls
 * whether SRC is used or not.
 *
 * ex) doesn't use SRC
 * struct rsnd_scu_platform_info info = {
 *	.flags = 0,
 *	.convert_rate = 0,
 * };
 *
 * ex) uses SRC
 * struct rsnd_scu_platform_info info = {
 *	.flags = RSND_SCU_USE_HPBIF,
 *	.convert_rate = 48000,
 * };
 *
 * ex) uses SRC bypass mode
 * struct rsnd_scu_platform_info info = {
 *	.flags = RSND_SCU_USE_HPBIF,
 *	.convert_rate = 0,
 * };
 *
 */

static int rsnd_scu_ssi_mode_init(struct rsnd_mod *mod,
				  struct rsnd_dai *rdai,
				  struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	int id = rsnd_mod_id(mod);

	/*
	 * SSI_MODE0
	 */
	rsnd_mod_bset(mod, SSI_MODE0, (1 << id),
		      rsnd_scu_hpbif_is_enable(scu) ? 0 : (1 << id));

	/*
	 * SSI_MODE1
	 */
	if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) {
		int shift = -1;
		switch (id) {
		case 1:
			shift = 0;
			break;
		case 2:
			shift = 2;
			break;
		case 4:
			shift = 16;
			break;
		}

		if (shift >= 0)
			rsnd_mod_bset(mod, SSI_MODE1,
				      0x3 << shift,
				      rsnd_dai_is_clk_master(rdai) ?
				      0x2 << shift : 0x1 << shift);
	}

	return 0;
}

/* Gen1 only */
static int rsnd_src_set_route_if_gen1(
			      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 */
	};
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	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;

	/*
	 * ADG is used as source clock if SRC was used,
	 * then, SSI WS is used as destination clock.
	 * SSI WS is used as source clock if SRC is not used
	 * (when playback, source/destination become reverse when capture)
	 */
	if (rsnd_scu_convert_rate(scu))	/* use ADG */
		val = 0;
	else if (8 == id)		/* use SSI WS, but SRU8 is special */
		val = id << shift;
	else				/* use SSI WS */
		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;
}

unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv,
				   struct rsnd_mod *ssi_mod,
				   struct snd_pcm_runtime *runtime)
{
	struct rsnd_scu *scu;
	unsigned int rate;

	/* this function is assuming SSI id = SCU id here */
	scu = rsnd_mod_to_scu(rsnd_scu_mod_get(priv, rsnd_mod_id(ssi_mod)));

	/*
	 * return convert rate if SRC is used,
	 * otherwise, return runtime->rate as usual
	 */
	rate = rsnd_scu_convert_rate(scu);
	if (!rate)
		rate = runtime->rate;

	return rate;
}

static int rsnd_scu_set_convert_rate(struct rsnd_mod *mod,
				     struct rsnd_dai *rdai,
				     struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	u32 convert_rate = rsnd_scu_convert_rate(scu);
	u32 adinr = runtime->channels;

	/* set/clear soft reset */
	rsnd_mod_write(mod, SRC_SWRSR, 0);
	rsnd_mod_write(mod, SRC_SWRSR, 1);

	/* Initialize the operation of the SRC internal circuits */
	rsnd_mod_write(mod, SRC_SRCIR, 1);

	/* Set channel number and output bit length */
	switch (runtime->sample_bits) {
	case 16:
		adinr |= OTBL_16;
		break;
	case 32:
		adinr |= OTBL_24;
		break;
	default:
		return -EIO;
	}
	rsnd_mod_write(mod, SRC_ADINR, adinr);

	if (convert_rate) {
		u32 fsrate = 0x0400000 / convert_rate * runtime->rate;
		int ret;

		/* Enable the initial value of IFS */
		rsnd_mod_write(mod, SRC_IFSCR, 1);

		/* Set initial value of IFS */
		rsnd_mod_write(mod, SRC_IFSVR, fsrate);

		/* Select SRC mode (fixed value) */
		rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);

		/* Set the restriction value of the FS ratio (98%) */
		rsnd_mod_write(mod, SRC_MNFSR, fsrate / 100 * 98);

		if (rsnd_is_gen1(priv)) {
			/* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
		}

		/* set convert clock */
		ret = rsnd_adg_set_convert_clk(priv, mod,
					       runtime->rate,
					       convert_rate);
		if (ret < 0)
			return ret;
	}

	/* Cancel the initialization and operate the SRC function */
	rsnd_mod_write(mod, SRC_SRCIR, 0);

	/* use DMA transfer */
	rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);

	return 0;
}

static int rsnd_scu_init(struct rsnd_mod *mod,
			  struct rsnd_dai *rdai,
			  struct rsnd_dai_stream *io)
{
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	int ret;

	clk_enable(scu->clk);

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

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

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

	return 0;
}

static int rsnd_scu_quit(struct rsnd_mod *mod,
			 struct rsnd_dai *rdai,
			 struct rsnd_dai_stream *io)
{
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);

	clk_disable(scu->clk);

	return 0;
}

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 rsnd_scu *scu = rsnd_mod_to_scu(mod);
	int id = rsnd_mod_id(mod);

	if (rsnd_is_gen1(priv))
		rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));

	if (rsnd_scu_convert_rate(scu))
		rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);

	return 0;
}

static int rsnd_scu_stop(struct rsnd_mod *mod,
			  struct rsnd_dai *rdai,
			  struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	int id = rsnd_mod_id(mod);

	if (rsnd_is_gen1(priv))
		rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);

	if (rsnd_scu_convert_rate(scu))
		rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);

	return 0;
}

static struct rsnd_mod_ops rsnd_scu_ops = {
	.name	= "scu",
	.init	= rsnd_scu_init,
	.quit	= rsnd_scu_quit,
	.start	= rsnd_scu_start,
	.stop	= rsnd_scu_stop,
};

static struct rsnd_mod_ops rsnd_scu_non_ops = {
	.name	= "scu (non)",
	.init	= rsnd_scu_ssi_mode_init,
};

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

	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;
	struct rsnd_mod_ops *ops;
	struct clk *clk;
	char name[RSND_SCU_NAME_SIZE];
	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) {
		snprintf(name, RSND_SCU_NAME_SIZE, "scu.%d", i);

		clk = devm_clk_get(dev, name);
		if (IS_ERR(clk))
			return PTR_ERR(clk);

		scu->info = &info->scu_info[i];
		scu->clk = clk;

		ops = &rsnd_scu_non_ops;
		if (rsnd_scu_hpbif_is_enable(scu))
			ops = &rsnd_scu_ops;

		rsnd_mod_init(priv, &scu->mod, ops, 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;
ef749400	16	struct clk *clk;
07539c1d KM	17	};
07539c1d KM	18
ef749400	19	#define RSND_SCU_NAME_SIZE 16
374a5281 KM	20
	21	/*
	22	* ADINR
	23	*/
	24	#define OTBL_24 (0 << 16)
	25	#define OTBL_22 (2 << 16)
	26	#define OTBL_20 (4 << 16)
	27	#define OTBL_18 (6 << 16)
	28	#define OTBL_16 (8 << 16)
	29
39cf3c40 KM	30	#define rsnd_scu_mode_flags(p) ((p)->info->flags)
	31	#define rsnd_scu_convert_rate(p) ((p)->info->convert_rate)
	32	#define rsnd_mod_to_scu(_mod) \
	33	container_of((_mod), struct rsnd_scu, mod)
96c7c0d6 KM	34	#define rsnd_scu_hpbif_is_enable(scu) \
96c7c0d6 KM	35	(rsnd_scu_mode_flags(scu) & RSND_SCU_USE_HPBIF)
39cf3c40 KM	36
	37	#define for_each_rsnd_scu(pos, priv, i) \
	38	for ((i) = 0; \
	39	((i) < rsnd_scu_nr(priv)) && \
	40	((pos) = (struct rsnd_scu *)(priv)->scu + i); \
	41	i++)
	42
	43
ef749400 KM	44	/*
	45	* image of SRC (Sampling Rate Converter)
	46	*
	47	* 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
	48	* 48kHz <-> \| SRC \| <------> \| SSI \| <-----> \| codec \|
	49	* 44.1kHz <-> +-----+ +-----+ +-------+
	50	* ...
	51	*
	52	*/
374a5281	53
c926b746 KM	54	/*
	55	* scu.c is caring...
	56	*
	57	* Gen1
	58	*
	59	* [mem] -> [SRU] -> [SSI]
	60	* \|--------\|
	61	*
	62	* Gen2
	63	*
	64	* [mem] -> [SCU] -> [SSIU] -> [SSI]
	65	* \|-----------------\|
	66	*/
	67
41c6221c KM	68	/*
	69	* How to use SRC bypass mode for debugging
	70	*
	71	* SRC has bypass mode, and it is useful for debugging.
	72	* In Gen2 case,
	73	* SRCm_MODE controls whether SRC is used or not
	74	* SSI_MODE0 controls whether SSIU which receives SRC data
	75	* is used or not.
	76	* Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
	77	* but SRC bypass mode needs SSI_MODE0 only.
	78	*
	79	* This driver request
	80	* struct rsnd_scu_platform_info {
	81	* u32 flags;
	82	* u32 convert_rate;
	83	* }
	84	*
	85	* rsnd_scu_hpbif_is_enable() will be true
	86	* if flags had RSND_SCU_USE_HPBIF,
	87	* and it controls whether SSIU is used or not.
	88	*
	89	* rsnd_scu_convert_rate() indicates
	90	* above convert_rate, and it controls
	91	* whether SRC is used or not.
	92	*
	93	* ex) doesn't use SRC
	94	* struct rsnd_scu_platform_info info = {
	95	* .flags = 0,
	96	* .convert_rate = 0,
	97	* };
	98	*
	99	* ex) uses SRC
	100	* struct rsnd_scu_platform_info info = {
	101	* .flags = RSND_SCU_USE_HPBIF,
	102	* .convert_rate = 48000,
	103	* };
	104	*
	105	* ex) uses SRC bypass mode
	106	* struct rsnd_scu_platform_info info = {
	107	* .flags = RSND_SCU_USE_HPBIF,
	108	* .convert_rate = 0,
	109	* };
	110	*
	111	*/
	112
7b5ce975 KM	113	static int rsnd_scu_ssi_mode_init(struct rsnd_mod *mod,
	114	struct rsnd_dai *rdai,
	115	struct rsnd_dai_stream *io)
	116	{
	117	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
96c7c0d6	118	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
7b5ce975 KM	119	int id = rsnd_mod_id(mod);
	120
	121	/*
	122	* SSI_MODE0
	123	*/
	124	rsnd_mod_bset(mod, SSI_MODE0, (1 << id),
96c7c0d6	125	rsnd_scu_hpbif_is_enable(scu) ? 0 : (1 << id));
7b5ce975 KM	126
	127	/*
	128	* SSI_MODE1
	129	*/
	130	if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) {
	131	int shift = -1;
	132	switch (id) {
	133	case 1:
	134	shift = 0;
	135	break;
	136	case 2:
	137	shift = 2;
	138	break;
	139	case 4:
	140	shift = 16;
	141	break;
	142	}
	143
	144	if (shift >= 0)
	145	rsnd_mod_bset(mod, SSI_MODE1,
	146	0x3 << shift,
	147	rsnd_dai_is_clk_master(rdai) ?
	148	0x2 << shift : 0x1 << shift);
	149	}
	150
	151	return 0;
	152	}
	153
2582718c	154	/* Gen1 only */
47718dc7	155	static int rsnd_src_set_route_if_gen1(
374a5281 KM	156	struct rsnd_mod *mod,
	157	struct rsnd_dai *rdai,
	158	struct rsnd_dai_stream *io)
	159	{
	160	struct scu_route_config {
	161	u32 mask;
	162	int shift;
	163	} routes[] = {
	164	{ 0xF, 0, }, /* 0 */
	165	{ 0xF, 4, }, /* 1 */
	166	{ 0xF, 8, }, /* 2 */
	167	{ 0x7, 12, }, /* 3 */
	168	{ 0x7, 16, }, /* 4 */
	169	{ 0x7, 20, }, /* 5 */
	170	{ 0x7, 24, }, /* 6 */
	171	{ 0x3, 28, }, /* 7 */
	172	{ 0x3, 30, }, /* 8 */
	173	};
47718dc7	174	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
ef749400	175	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
374a5281 KM	176	u32 mask;
	177	u32 val;
	178	int shift;
	179	int id;
	180
	181	/*
	182	* Gen1 only
	183	*/
	184	if (!rsnd_is_gen1(priv))
	185	return 0;
	186
	187	id = rsnd_mod_id(mod);
b5f3d7af	188	if (id < 0 \|\| id >= ARRAY_SIZE(routes))
374a5281 KM	189	return -EIO;
	190
	191	/*
	192	* SRC_ROUTE_SELECT
	193	*/
	194	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	195	val = val << routes[id].shift;
	196	mask = routes[id].mask << routes[id].shift;
	197
	198	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
	199
	200	/*
	201	* SRC_TIMING_SELECT
	202	*/
	203	shift = (id % 4) * 8;
	204	mask = 0x1F << shift;
ef749400 KM	205
	206	/*
	207	* ADG is used as source clock if SRC was used,
	208	* then, SSI WS is used as destination clock.
	209	* SSI WS is used as source clock if SRC is not used
	210	* (when playback, source/destination become reverse when capture)
	211	*/
	212	if (rsnd_scu_convert_rate(scu)) /* use ADG */
	213	val = 0;
	214	else if (8 == id) /* use SSI WS, but SRU8 is special */
374a5281	215	val = id << shift;
ef749400	216	else /* use SSI WS */
374a5281 KM	217	val = (id + 1) << shift;
	218
	219	switch (id / 4) {
	220	case 0:
	221	rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
	222	break;
	223	case 1:
	224	rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
	225	break;
	226	case 2:
	227	rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
	228	break;
	229	}
	230
	231	return 0;
	232	}
	233
ef749400 KM	234	unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv,
	235	struct rsnd_mod *ssi_mod,
	236	struct snd_pcm_runtime *runtime)
374a5281	237	{
ef749400 KM	238	struct rsnd_scu *scu;
ef749400 KM	239	unsigned int rate;
374a5281	240
ef749400 KM	241	/* this function is assuming SSI id = SCU id here */
ef749400 KM	242	scu = rsnd_mod_to_scu(rsnd_scu_mod_get(priv, rsnd_mod_id(ssi_mod)));
374a5281	243
ef749400 KM	244	/*
	245	* return convert rate if SRC is used,
	246	* otherwise, return runtime->rate as usual
	247	*/
	248	rate = rsnd_scu_convert_rate(scu);
	249	if (!rate)
	250	rate = runtime->rate;
	251
	252	return rate;
374a5281 KM	253	}
374a5281 KM	254
f80e1c96 KM	255	static int rsnd_scu_set_convert_rate(struct rsnd_mod *mod,
	256	struct rsnd_dai *rdai,
	257	struct rsnd_dai_stream *io)
374a5281	258	{
47718dc7	259	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
374a5281	260	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
ef749400 KM	261	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
ef749400 KM	262	u32 convert_rate = rsnd_scu_convert_rate(scu);
374a5281 KM	263	u32 adinr = runtime->channels;
374a5281 KM	264
ef749400 KM	265	/* set/clear soft reset */
	266	rsnd_mod_write(mod, SRC_SWRSR, 0);
	267	rsnd_mod_write(mod, SRC_SWRSR, 1);
	268
	269	/* Initialize the operation of the SRC internal circuits */
	270	rsnd_mod_write(mod, SRC_SRCIR, 1);
	271
	272	/* Set channel number and output bit length */
374a5281 KM	273	switch (runtime->sample_bits) {
	274	case 16:
	275	adinr \|= OTBL_16;
	276	break;
	277	case 32:
	278	adinr \|= OTBL_24;
	279	break;
	280	default:
	281	return -EIO;
	282	}
690ef81e	283	rsnd_mod_write(mod, SRC_ADINR, adinr);
374a5281	284
ef749400 KM	285	if (convert_rate) {
	286	u32 fsrate = 0x0400000 / convert_rate * runtime->rate;
	287	int ret;
	288
	289	/* Enable the initial value of IFS */
	290	rsnd_mod_write(mod, SRC_IFSCR, 1);
	291
	292	/* Set initial value of IFS */
	293	rsnd_mod_write(mod, SRC_IFSVR, fsrate);
	294
	295	/* Select SRC mode (fixed value) */
	296	rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
	297
	298	/* Set the restriction value of the FS ratio (98%) */
	299	rsnd_mod_write(mod, SRC_MNFSR, fsrate / 100 * 98);
	300
	301	if (rsnd_is_gen1(priv)) {
	302	/* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
	303	}
374a5281	304
ef749400 KM	305	/* set convert clock */
	306	ret = rsnd_adg_set_convert_clk(priv, mod,
	307	runtime->rate,
	308	convert_rate);
	309	if (ret < 0)
	310	return ret;
	311	}
	312
	313	/* Cancel the initialization and operate the SRC function */
	314	rsnd_mod_write(mod, SRC_SRCIR, 0);
	315
	316	/* use DMA transfer */
0290d2a4	317	rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
ef749400	318
374a5281 KM	319	return 0;
	320	}
	321
a204d90c	322	static int rsnd_scu_init(struct rsnd_mod *mod,
07539c1d KM	323	struct rsnd_dai *rdai,
	324	struct rsnd_dai_stream *io)
	325	{
ef749400	326	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
374a5281 KM	327	int ret;
374a5281 KM	328
ef749400 KM	329	clk_enable(scu->clk);
ef749400 KM	330
7b5ce975 KM	331	ret = rsnd_scu_ssi_mode_init(mod, rdai, io);
	332	if (ret < 0)
	333	return ret;
	334
47718dc7	335	ret = rsnd_src_set_route_if_gen1(mod, rdai, io);
374a5281 KM	336	if (ret < 0)
	337	return ret;
	338
f80e1c96	339	ret = rsnd_scu_set_convert_rate(mod, rdai, io);
374a5281 KM	340	if (ret < 0)
374a5281 KM	341	return ret;
07539c1d	342
a204d90c KM	343	return 0;
	344	}
	345
	346	static int rsnd_scu_quit(struct rsnd_mod *mod,
	347	struct rsnd_dai *rdai,
	348	struct rsnd_dai_stream *io)
	349	{
	350	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	351
	352	clk_disable(scu->clk);
374a5281	353
07539c1d KM	354	return 0;
	355	}
	356
a204d90c KM	357	static int rsnd_scu_start(struct rsnd_mod *mod,
	358	struct rsnd_dai *rdai,
	359	struct rsnd_dai_stream *io)
	360	{
	361	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	362	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
e7ce74ea	363	int id = rsnd_mod_id(mod);
a204d90c	364
e7ce74ea KM	365	if (rsnd_is_gen1(priv))
	366	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
	367
	368	if (rsnd_scu_convert_rate(scu))
	369	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
	370
	371	return 0;
a204d90c KM	372	}
a204d90c KM	373
ef749400 KM	374	static int rsnd_scu_stop(struct rsnd_mod *mod,
	375	struct rsnd_dai *rdai,
	376	struct rsnd_dai_stream *io)
	377	{
	378	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	379	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
e7ce74ea KM	380	int id = rsnd_mod_id(mod);
	381
	382	if (rsnd_is_gen1(priv))
	383	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
ef749400	384
e7ce74ea KM	385	if (rsnd_scu_convert_rate(scu))
e7ce74ea KM	386	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
ef749400	387
ef749400 KM	388	return 0;
	389	}
	390
07539c1d KM	391	static struct rsnd_mod_ops rsnd_scu_ops = {
07539c1d KM	392	.name = "scu",
a204d90c KM	393	.init = rsnd_scu_init,
a204d90c KM	394	.quit = rsnd_scu_quit,
07539c1d	395	.start = rsnd_scu_start,
ef749400	396	.stop = rsnd_scu_stop,
07539c1d KM	397	};
07539c1d KM	398
013f38fe KM	399	static struct rsnd_mod_ops rsnd_scu_non_ops = {
013f38fe KM	400	.name = "scu (non)",
7b5ce975	401	.init = rsnd_scu_ssi_mode_init,
013f38fe KM	402	};
013f38fe KM	403
07539c1d KM	404	struct rsnd_mod rsnd_scu_mod_get(struct rsnd_priv priv, int id)
07539c1d KM	405	{
8b14719b TI	406	if (WARN_ON(id < 0 \|\| id >= rsnd_scu_nr(priv)))
8b14719b TI	407	id = 0;
07539c1d KM	408
	409	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
	410	}
	411
	412	int rsnd_scu_probe(struct platform_device *pdev,
	413	struct rcar_snd_info *info,
	414	struct rsnd_priv *priv)
	415	{
	416	struct device *dev = rsnd_priv_to_dev(priv);
	417	struct rsnd_scu *scu;
013f38fe	418	struct rsnd_mod_ops *ops;
ef749400 KM	419	struct clk *clk;
ef749400 KM	420	char name[RSND_SCU_NAME_SIZE];
07539c1d KM	421	int i, nr;
	422
	423	/*
	424	* init SCU
	425	*/
	426	nr = info->scu_info_nr;
	427	scu = devm_kzalloc(dev, sizeof(scu) nr, GFP_KERNEL);
	428	if (!scu) {
	429	dev_err(dev, "SCU allocate failed\n");
	430	return -ENOMEM;
	431	}
	432
	433	priv->scu_nr = nr;
	434	priv->scu = scu;
	435
	436	for_each_rsnd_scu(scu, priv, i) {
ef749400 KM	437	snprintf(name, RSND_SCU_NAME_SIZE, "scu.%d", i);
	438
	439	clk = devm_clk_get(dev, name);
	440	if (IS_ERR(clk))
	441	return PTR_ERR(clk);
	442
07539c1d	443	scu->info = &info->scu_info[i];
ef749400	444	scu->clk = clk;
07539c1d	445
013f38fe	446	ops = &rsnd_scu_non_ops;
96c7c0d6	447	if (rsnd_scu_hpbif_is_enable(scu))
013f38fe KM	448	ops = &rsnd_scu_ops;
	449
	450	rsnd_mod_init(priv, &scu->mod, ops, i);
	451
374a5281 KM	452	dev_dbg(dev, "SCU%d probed\n", i);
374a5281 KM	453	}
07539c1d KM	454	dev_dbg(dev, "scu probed\n");
	455
	456	return 0;
	457	}
	458
	459	void rsnd_scu_remove(struct platform_device *pdev,
	460	struct rsnd_priv *priv)
	461	{
	462	}