[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 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);
	int id = rsnd_mod_id(mod);

	/*
	 * SSI_MODE0
	 */
	rsnd_mod_bset(mod, SSI_MODE0, (1 << id),
		      rsnd_scu_hpbif_is_enable(mod) ? 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;
}

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_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->mod))
			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)
	34
	35	#define for_each_rsnd_scu(pos, priv, i) \
	36	for ((i) = 0; \
	37	((i) < rsnd_scu_nr(priv)) && \
	38	((pos) = (struct rsnd_scu *)(priv)->scu + i); \
	39	i++)
	40
	41
ef749400 KM	42	/*
	43	* image of SRC (Sampling Rate Converter)
	44	*
	45	* 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
	46	* 48kHz <-> \| SRC \| <------> \| SSI \| <-----> \| codec \|
	47	* 44.1kHz <-> +-----+ +-----+ +-------+
	48	* ...
	49	*
	50	*/
374a5281	51
c926b746 KM	52	/*
	53	* scu.c is caring...
	54	*
	55	* Gen1
	56	*
	57	* [mem] -> [SRU] -> [SSI]
	58	* \|--------\|
	59	*
	60	* Gen2
	61	*
	62	* [mem] -> [SCU] -> [SSIU] -> [SSI]
	63	* \|-----------------\|
	64	*/
	65
41c6221c KM	66	/*
	67	* How to use SRC bypass mode for debugging
	68	*
	69	* SRC has bypass mode, and it is useful for debugging.
	70	* In Gen2 case,
	71	* SRCm_MODE controls whether SRC is used or not
	72	* SSI_MODE0 controls whether SSIU which receives SRC data
	73	* is used or not.
	74	* Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
	75	* but SRC bypass mode needs SSI_MODE0 only.
	76	*
	77	* This driver request
	78	* struct rsnd_scu_platform_info {
	79	* u32 flags;
	80	* u32 convert_rate;
	81	* }
	82	*
	83	* rsnd_scu_hpbif_is_enable() will be true
	84	* if flags had RSND_SCU_USE_HPBIF,
	85	* and it controls whether SSIU is used or not.
	86	*
	87	* rsnd_scu_convert_rate() indicates
	88	* above convert_rate, and it controls
	89	* whether SRC is used or not.
	90	*
	91	* ex) doesn't use SRC
	92	* struct rsnd_scu_platform_info info = {
	93	* .flags = 0,
	94	* .convert_rate = 0,
	95	* };
	96	*
	97	* ex) uses SRC
	98	* struct rsnd_scu_platform_info info = {
	99	* .flags = RSND_SCU_USE_HPBIF,
	100	* .convert_rate = 48000,
	101	* };
	102	*
	103	* ex) uses SRC bypass mode
	104	* struct rsnd_scu_platform_info info = {
	105	* .flags = RSND_SCU_USE_HPBIF,
	106	* .convert_rate = 0,
	107	* };
	108	*
	109	*/
	110
7b5ce975 KM	111	static int rsnd_scu_ssi_mode_init(struct rsnd_mod *mod,
	112	struct rsnd_dai *rdai,
	113	struct rsnd_dai_stream *io)
	114	{
	115	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	116	int id = rsnd_mod_id(mod);
	117
	118	/*
	119	* SSI_MODE0
	120	*/
	121	rsnd_mod_bset(mod, SSI_MODE0, (1 << id),
	122	rsnd_scu_hpbif_is_enable(mod) ? 0 : (1 << id));
	123
	124	/*
	125	* SSI_MODE1
	126	*/
	127	if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) {
	128	int shift = -1;
	129	switch (id) {
	130	case 1:
	131	shift = 0;
	132	break;
	133	case 2:
	134	shift = 2;
	135	break;
	136	case 4:
	137	shift = 16;
	138	break;
	139	}
	140
	141	if (shift >= 0)
	142	rsnd_mod_bset(mod, SSI_MODE1,
	143	0x3 << shift,
	144	rsnd_dai_is_clk_master(rdai) ?
	145	0x2 << shift : 0x1 << shift);
	146	}
	147
	148	return 0;
	149	}
	150
2582718c	151	/* Gen1 only */
47718dc7	152	static int rsnd_src_set_route_if_gen1(
374a5281 KM	153	struct rsnd_mod *mod,
	154	struct rsnd_dai *rdai,
	155	struct rsnd_dai_stream *io)
	156	{
	157	struct scu_route_config {
	158	u32 mask;
	159	int shift;
	160	} routes[] = {
	161	{ 0xF, 0, }, /* 0 */
	162	{ 0xF, 4, }, /* 1 */
	163	{ 0xF, 8, }, /* 2 */
	164	{ 0x7, 12, }, /* 3 */
	165	{ 0x7, 16, }, /* 4 */
	166	{ 0x7, 20, }, /* 5 */
	167	{ 0x7, 24, }, /* 6 */
	168	{ 0x3, 28, }, /* 7 */
	169	{ 0x3, 30, }, /* 8 */
	170	};
47718dc7	171	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
ef749400	172	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
374a5281 KM	173	u32 mask;
	174	u32 val;
	175	int shift;
	176	int id;
	177
	178	/*
	179	* Gen1 only
	180	*/
	181	if (!rsnd_is_gen1(priv))
	182	return 0;
	183
	184	id = rsnd_mod_id(mod);
b5f3d7af	185	if (id < 0 \|\| id >= ARRAY_SIZE(routes))
374a5281 KM	186	return -EIO;
	187
	188	/*
	189	* SRC_ROUTE_SELECT
	190	*/
	191	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	192	val = val << routes[id].shift;
	193	mask = routes[id].mask << routes[id].shift;
	194
	195	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
	196
	197	/*
	198	* SRC_TIMING_SELECT
	199	*/
	200	shift = (id % 4) * 8;
	201	mask = 0x1F << shift;
ef749400 KM	202
	203	/*
	204	* ADG is used as source clock if SRC was used,
	205	* then, SSI WS is used as destination clock.
	206	* SSI WS is used as source clock if SRC is not used
	207	* (when playback, source/destination become reverse when capture)
	208	*/
	209	if (rsnd_scu_convert_rate(scu)) /* use ADG */
	210	val = 0;
	211	else if (8 == id) /* use SSI WS, but SRU8 is special */
374a5281	212	val = id << shift;
ef749400	213	else /* use SSI WS */
374a5281 KM	214	val = (id + 1) << shift;
	215
	216	switch (id / 4) {
	217	case 0:
	218	rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
	219	break;
	220	case 1:
	221	rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
	222	break;
	223	case 2:
	224	rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
	225	break;
	226	}
	227
	228	return 0;
	229	}
	230
ef749400 KM	231	unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv,
	232	struct rsnd_mod *ssi_mod,
	233	struct snd_pcm_runtime *runtime)
374a5281	234	{
ef749400 KM	235	struct rsnd_scu *scu;
ef749400 KM	236	unsigned int rate;
374a5281	237
ef749400 KM	238	/* this function is assuming SSI id = SCU id here */
ef749400 KM	239	scu = rsnd_mod_to_scu(rsnd_scu_mod_get(priv, rsnd_mod_id(ssi_mod)));
374a5281	240
ef749400 KM	241	/*
	242	* return convert rate if SRC is used,
	243	* otherwise, return runtime->rate as usual
	244	*/
	245	rate = rsnd_scu_convert_rate(scu);
	246	if (!rate)
	247	rate = runtime->rate;
	248
	249	return rate;
374a5281 KM	250	}
374a5281 KM	251
f80e1c96 KM	252	static int rsnd_scu_set_convert_rate(struct rsnd_mod *mod,
	253	struct rsnd_dai *rdai,
	254	struct rsnd_dai_stream *io)
374a5281	255	{
47718dc7	256	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
374a5281	257	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
ef749400 KM	258	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
ef749400 KM	259	u32 convert_rate = rsnd_scu_convert_rate(scu);
374a5281 KM	260	u32 adinr = runtime->channels;
374a5281 KM	261
ef749400 KM	262	/* set/clear soft reset */
	263	rsnd_mod_write(mod, SRC_SWRSR, 0);
	264	rsnd_mod_write(mod, SRC_SWRSR, 1);
	265
	266	/* Initialize the operation of the SRC internal circuits */
	267	rsnd_mod_write(mod, SRC_SRCIR, 1);
	268
	269	/* Set channel number and output bit length */
374a5281 KM	270	switch (runtime->sample_bits) {
	271	case 16:
	272	adinr \|= OTBL_16;
	273	break;
	274	case 32:
	275	adinr \|= OTBL_24;
	276	break;
	277	default:
	278	return -EIO;
	279	}
690ef81e	280	rsnd_mod_write(mod, SRC_ADINR, adinr);
374a5281	281
ef749400 KM	282	if (convert_rate) {
	283	u32 fsrate = 0x0400000 / convert_rate * runtime->rate;
	284	int ret;
	285
	286	/* Enable the initial value of IFS */
	287	rsnd_mod_write(mod, SRC_IFSCR, 1);
	288
	289	/* Set initial value of IFS */
	290	rsnd_mod_write(mod, SRC_IFSVR, fsrate);
	291
	292	/* Select SRC mode (fixed value) */
	293	rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
	294
	295	/* Set the restriction value of the FS ratio (98%) */
	296	rsnd_mod_write(mod, SRC_MNFSR, fsrate / 100 * 98);
	297
	298	if (rsnd_is_gen1(priv)) {
	299	/* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
	300	}
374a5281	301
ef749400 KM	302	/* set convert clock */
	303	ret = rsnd_adg_set_convert_clk(priv, mod,
	304	runtime->rate,
	305	convert_rate);
	306	if (ret < 0)
	307	return ret;
	308	}
	309
	310	/* Cancel the initialization and operate the SRC function */
	311	rsnd_mod_write(mod, SRC_SRCIR, 0);
	312
	313	/* use DMA transfer */
0290d2a4	314	rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
ef749400	315
374a5281 KM	316	return 0;
	317	}
	318
cdcfcac9 KM	319	bool rsnd_scu_hpbif_is_enable(struct rsnd_mod *mod)
	320	{
	321	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	322	u32 flags = rsnd_scu_mode_flags(scu);
	323
	324	return !!(flags & RSND_SCU_USE_HPBIF);
	325	}
	326
a204d90c	327	static int rsnd_scu_init(struct rsnd_mod *mod,
07539c1d KM	328	struct rsnd_dai *rdai,
	329	struct rsnd_dai_stream *io)
	330	{
ef749400	331	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
374a5281 KM	332	int ret;
374a5281 KM	333
ef749400 KM	334	clk_enable(scu->clk);
ef749400 KM	335
7b5ce975 KM	336	ret = rsnd_scu_ssi_mode_init(mod, rdai, io);
	337	if (ret < 0)
	338	return ret;
	339
47718dc7	340	ret = rsnd_src_set_route_if_gen1(mod, rdai, io);
374a5281 KM	341	if (ret < 0)
	342	return ret;
	343
f80e1c96	344	ret = rsnd_scu_set_convert_rate(mod, rdai, io);
374a5281 KM	345	if (ret < 0)
374a5281 KM	346	return ret;
07539c1d	347
a204d90c KM	348	return 0;
	349	}
	350
	351	static int rsnd_scu_quit(struct rsnd_mod *mod,
	352	struct rsnd_dai *rdai,
	353	struct rsnd_dai_stream *io)
	354	{
	355	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	356
	357	clk_disable(scu->clk);
374a5281	358
07539c1d KM	359	return 0;
	360	}
	361
a204d90c KM	362	static int rsnd_scu_start(struct rsnd_mod *mod,
	363	struct rsnd_dai *rdai,
	364	struct rsnd_dai_stream *io)
	365	{
	366	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	367	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
e7ce74ea	368	int id = rsnd_mod_id(mod);
a204d90c	369
e7ce74ea KM	370	if (rsnd_is_gen1(priv))
	371	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
	372
	373	if (rsnd_scu_convert_rate(scu))
	374	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
	375
	376	return 0;
a204d90c KM	377	}
a204d90c KM	378
ef749400 KM	379	static int rsnd_scu_stop(struct rsnd_mod *mod,
	380	struct rsnd_dai *rdai,
	381	struct rsnd_dai_stream *io)
	382	{
	383	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	384	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
e7ce74ea KM	385	int id = rsnd_mod_id(mod);
	386
	387	if (rsnd_is_gen1(priv))
	388	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
ef749400	389
e7ce74ea KM	390	if (rsnd_scu_convert_rate(scu))
e7ce74ea KM	391	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
ef749400	392
ef749400 KM	393	return 0;
	394	}
	395
07539c1d KM	396	static struct rsnd_mod_ops rsnd_scu_ops = {
07539c1d KM	397	.name = "scu",
a204d90c KM	398	.init = rsnd_scu_init,
a204d90c KM	399	.quit = rsnd_scu_quit,
07539c1d	400	.start = rsnd_scu_start,
ef749400	401	.stop = rsnd_scu_stop,
07539c1d KM	402	};
07539c1d KM	403
013f38fe KM	404	static struct rsnd_mod_ops rsnd_scu_non_ops = {
013f38fe KM	405	.name = "scu (non)",
7b5ce975	406	.init = rsnd_scu_ssi_mode_init,
013f38fe KM	407	};
013f38fe KM	408
07539c1d KM	409	struct rsnd_mod rsnd_scu_mod_get(struct rsnd_priv priv, int id)
07539c1d KM	410	{
8b14719b TI	411	if (WARN_ON(id < 0 \|\| id >= rsnd_scu_nr(priv)))
8b14719b TI	412	id = 0;
07539c1d KM	413
	414	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
	415	}
	416
	417	int rsnd_scu_probe(struct platform_device *pdev,
	418	struct rcar_snd_info *info,
	419	struct rsnd_priv *priv)
	420	{
	421	struct device *dev = rsnd_priv_to_dev(priv);
	422	struct rsnd_scu *scu;
013f38fe	423	struct rsnd_mod_ops *ops;
ef749400 KM	424	struct clk *clk;
ef749400 KM	425	char name[RSND_SCU_NAME_SIZE];
07539c1d KM	426	int i, nr;
	427
	428	/*
	429	* init SCU
	430	*/
	431	nr = info->scu_info_nr;
	432	scu = devm_kzalloc(dev, sizeof(scu) nr, GFP_KERNEL);
	433	if (!scu) {
	434	dev_err(dev, "SCU allocate failed\n");
	435	return -ENOMEM;
	436	}
	437
	438	priv->scu_nr = nr;
	439	priv->scu = scu;
	440
	441	for_each_rsnd_scu(scu, priv, i) {
ef749400 KM	442	snprintf(name, RSND_SCU_NAME_SIZE, "scu.%d", i);
	443
	444	clk = devm_clk_get(dev, name);
	445	if (IS_ERR(clk))
	446	return PTR_ERR(clk);
	447
07539c1d	448	scu->info = &info->scu_info[i];
ef749400	449	scu->clk = clk;
07539c1d	450
013f38fe KM	451	ops = &rsnd_scu_non_ops;
	452	if (rsnd_scu_hpbif_is_enable(&scu->mod))
	453	ops = &rsnd_scu_ops;
	454
	455	rsnd_mod_init(priv, &scu->mod, ops, i);
	456
374a5281 KM	457	dev_dbg(dev, "SCU%d probed\n", i);
374a5281 KM	458	}
07539c1d KM	459	dev_dbg(dev, "scu probed\n");
	460
	461	return 0;
	462	}
	463
	464	void rsnd_scu_remove(struct platform_device *pdev,
	465	struct rsnd_priv *priv)
	466	{
	467	}