[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;
	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,
 * };
 *
 */

/*
 *		Gen1/Gen2 common functions
 */
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;
}

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 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;
	u32 fsrate = 0;

	if (convert_rate)
		fsrate = 0x0400000 / convert_rate * runtime->rate;

	/* 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
	 * see rsnd_scu_start()
	 */
	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);

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

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

	/* 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;

	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_scu *scu = rsnd_mod_to_scu(mod);

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

	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_scu *scu = rsnd_mod_to_scu(mod);

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

	return 0;
}

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

/*
 *		Gen1 functions
 */
static int rsnd_src_set_route_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 */
	};
	u32 mask;
	u32 val;
	int id;

	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);

	return 0;
}

static int rsnd_scu_set_convert_timing_gen1(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);
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	u32 convert_rate = rsnd_scu_convert_rate(scu);
	u32 mask;
	u32 val;
	int shift;
	int id = rsnd_mod_id(mod);
	int ret;

	/*
	 * 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)
	 */
	ret = 0;
	if (convert_rate) {
		/* use ADG */
		val = 0;
		ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
						    runtime->rate,
						    convert_rate);
	} else if (8 == id) {
		/* use SSI WS, but SRU8 is special */
		val = id << shift;
	} else {
		/* use SSI WS */
		val = (id + 1) << shift;
	}

	if (ret < 0)
		return ret;

	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_convert_rate_gen1(struct rsnd_mod *mod,
					  struct rsnd_dai *rdai,
					  struct rsnd_dai_stream *io)
{
	int ret;

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

	/* 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,
		       rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);

	/* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */

	return 0;
}

static int rsnd_scu_init_gen1(struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	int ret;

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

	ret = rsnd_src_set_route_gen1(mod, rdai, io);
	if (ret < 0)
		return ret;

	ret = rsnd_scu_set_convert_rate_gen1(mod, rdai, io);
	if (ret < 0)
		return ret;

	ret = rsnd_scu_set_convert_timing_gen1(mod, rdai, io);
	if (ret < 0)
		return ret;

	return 0;
}

static int rsnd_scu_start_gen1(struct rsnd_mod *mod,
			       struct rsnd_dai *rdai,
			       struct rsnd_dai_stream *io)
{
	int id = rsnd_mod_id(mod);

	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));

	return rsnd_scu_start(mod, rdai, io);
}

static int rsnd_scu_stop_gen1(struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	int id = rsnd_mod_id(mod);

	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);

	return rsnd_scu_stop(mod, rdai, io);
}

static struct rsnd_mod_ops rsnd_scu_gen1_ops = {
	.name	= "sru (gen1)",
	.init	= rsnd_scu_init_gen1,
	.quit	= rsnd_scu_quit,
	.start	= rsnd_scu_start_gen1,
	.stop	= rsnd_scu_stop_gen1,
};

static struct rsnd_mod_ops rsnd_scu_non_gen1_ops = {
	.name	= "non-sru (gen1)",
	.init	= rsnd_scu_ssi_mode_init,
};

/*
 *		Gen2 functions
 */
static int rsnd_scu_start_non_gen2(struct rsnd_mod *mod,
				   struct rsnd_dai *rdai,
				   struct rsnd_dai_stream *io)
{
	/* enable PIO interrupt */
	rsnd_mod_write(mod, INT_ENABLE, 0x0f000000);

	return 0;
}

static struct rsnd_mod_ops rsnd_scu_non_gen2_ops = {
	.name	= "non-scu (gen2)",
	.init	= rsnd_scu_ssi_mode_init,
	.start	= rsnd_scu_start_non_gen2,
};

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)) {
			if (rsnd_is_gen1(priv))
				ops = &rsnd_scu_gen1_ops;
		} else {
			if (rsnd_is_gen1(priv))
				ops = &rsnd_scu_non_gen1_ops;
			if (rsnd_is_gen2(priv))
				ops = &rsnd_scu_non_gen2_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
1b7b08ef KM	113	/*
	114	* Gen1/Gen2 common functions
	115	*/
7b5ce975 KM	116	static int rsnd_scu_ssi_mode_init(struct rsnd_mod *mod,
	117	struct rsnd_dai *rdai,
	118	struct rsnd_dai_stream *io)
	119	{
	120	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
96c7c0d6	121	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
7b5ce975 KM	122	int id = rsnd_mod_id(mod);
	123
	124	/*
	125	* SSI_MODE0
	126	*/
	127	rsnd_mod_bset(mod, SSI_MODE0, (1 << id),
96c7c0d6	128	rsnd_scu_hpbif_is_enable(scu) ? 0 : (1 << id));
7b5ce975 KM	129
	130	/*
	131	* SSI_MODE1
	132	*/
	133	if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) {
	134	int shift = -1;
	135	switch (id) {
	136	case 1:
	137	shift = 0;
	138	break;
	139	case 2:
	140	shift = 2;
	141	break;
	142	case 4:
	143	shift = 16;
	144	break;
	145	}
	146
	147	if (shift >= 0)
	148	rsnd_mod_bset(mod, SSI_MODE1,
	149	0x3 << shift,
	150	rsnd_dai_is_clk_master(rdai) ?
	151	0x2 << shift : 0x1 << shift);
	152	}
	153
	154	return 0;
	155	}
	156
1b7b08ef KM	157	unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv,
	158	struct rsnd_mod *ssi_mod,
	159	struct snd_pcm_runtime *runtime)
	160	{
	161	struct rsnd_scu *scu;
	162	unsigned int rate;
	163
	164	/* this function is assuming SSI id = SCU id here */
	165	scu = rsnd_mod_to_scu(rsnd_scu_mod_get(priv, rsnd_mod_id(ssi_mod)));
	166
	167	/*
	168	* return convert rate if SRC is used,
	169	* otherwise, return runtime->rate as usual
	170	*/
	171	rate = rsnd_scu_convert_rate(scu);
	172	if (!rate)
	173	rate = runtime->rate;
	174
	175	return rate;
	176	}
	177
	178	static int rsnd_scu_set_convert_rate(struct rsnd_mod *mod,
	179	struct rsnd_dai *rdai,
	180	struct rsnd_dai_stream *io)
	181	{
	182	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	183	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	184	u32 convert_rate = rsnd_scu_convert_rate(scu);
	185	u32 adinr = runtime->channels;
	186	u32 fsrate = 0;
	187
	188	if (convert_rate)
	189	fsrate = 0x0400000 / convert_rate * runtime->rate;
	190
	191	/* set/clear soft reset */
	192	rsnd_mod_write(mod, SRC_SWRSR, 0);
	193	rsnd_mod_write(mod, SRC_SWRSR, 1);
	194
	195	/*
	196	* Initialize the operation of the SRC internal circuits
	197	* see rsnd_scu_start()
	198	*/
	199	rsnd_mod_write(mod, SRC_SRCIR, 1);
	200
	201	/* Set channel number and output bit length */
	202	switch (runtime->sample_bits) {
	203	case 16:
	204	adinr \|= OTBL_16;
	205	break;
	206	case 32:
	207	adinr \|= OTBL_24;
	208	break;
	209	default:
	210	return -EIO;
	211	}
	212	rsnd_mod_write(mod, SRC_ADINR, adinr);
	213
	214	/* Enable the initial value of IFS */
	215	if (fsrate) {
	216	rsnd_mod_write(mod, SRC_IFSCR, 1);
	217
	218	/* Set initial value of IFS */
	219	rsnd_mod_write(mod, SRC_IFSVR, fsrate);
	220	}
221
222	/* use DMA transfer */
223	rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
224
225	return 0;
226	}
227
228	static int rsnd_scu_init(struct rsnd_mod *mod,
229	struct rsnd_dai *rdai,
230	struct rsnd_dai_stream *io)
231	{
232	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
233	int ret;
234
235	clk_enable(scu->clk);
236
237	ret = rsnd_scu_ssi_mode_init(mod, rdai, io);
238	if (ret < 0)
239	return ret;
240
241	return 0;
242	}
243
244	static int rsnd_scu_quit(struct rsnd_mod *mod,
245	struct rsnd_dai *rdai,
246	struct rsnd_dai_stream *io)
247	{
248	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
249
250	clk_disable(scu->clk);
251
252	return 0;
253	}
254
255	static int rsnd_scu_start(struct rsnd_mod *mod,
256	struct rsnd_dai *rdai,
257	struct rsnd_dai_stream *io)
258	{
259	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
260
261	/*
262	* Cancel the initialization and operate the SRC function
263	* see rsnd_scu_set_convert_rate()
264	*/
265	rsnd_mod_write(mod, SRC_SRCIR, 0);
266
267	if (rsnd_scu_convert_rate(scu))
268	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
269
270	return 0;
271	}
272
273
274	static int rsnd_scu_stop(struct rsnd_mod *mod,
275	struct rsnd_dai *rdai,
276	struct rsnd_dai_stream *io)
277	{
278	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
279
280	if (rsnd_scu_convert_rate(scu))
281	rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
282
283	return 0;
284	}
285
286	static struct rsnd_mod_ops rsnd_scu_non_ops = {
287	.name = "scu (non)",
288	};
289
290	/*
291	* Gen1 functions
292	*/
293	static int rsnd_src_set_route_gen1(struct rsnd_mod *mod,
294	struct rsnd_dai *rdai,
295	struct rsnd_dai_stream *io)
374a5281 KM	296	{
	297	struct scu_route_config {
	298	u32 mask;
	299	int shift;
	300	} routes[] = {
	301	{ 0xF, 0, }, /* 0 */
	302	{ 0xF, 4, }, /* 1 */
	303	{ 0xF, 8, }, /* 2 */
	304	{ 0x7, 12, }, /* 3 */
	305	{ 0x7, 16, }, /* 4 */
	306	{ 0x7, 20, }, /* 5 */
	307	{ 0x7, 24, }, /* 6 */
	308	{ 0x3, 28, }, /* 7 */
	309	{ 0x3, 30, }, /* 8 */
	310	};
374a5281 KM	311	u32 mask;
374a5281 KM	312	u32 val;
374a5281 KM	313	int id;
374a5281 KM	314
374a5281	315	id = rsnd_mod_id(mod);
b5f3d7af	316	if (id < 0 \|\| id >= ARRAY_SIZE(routes))
374a5281 KM	317	return -EIO;
	318
	319	/*
	320	* SRC_ROUTE_SELECT
	321	*/
	322	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	323	val = val << routes[id].shift;
	324	mask = routes[id].mask << routes[id].shift;
	325
	326	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
	327
28dc4b63 KM	328	return 0;
	329	}
	330
	331	static int rsnd_scu_set_convert_timing_gen1(struct rsnd_mod *mod,
	332	struct rsnd_dai *rdai,
	333	struct rsnd_dai_stream *io)
	334	{
	335	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	336	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	337	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	338	u32 convert_rate = rsnd_scu_convert_rate(scu);
	339	u32 mask;
	340	u32 val;
	341	int shift;
	342	int id = rsnd_mod_id(mod);
	343	int ret;
	344
374a5281 KM	345	/*
	346	* SRC_TIMING_SELECT
	347	*/
	348	shift = (id % 4) * 8;
	349	mask = 0x1F << shift;
ef749400 KM	350
	351	/*
	352	* ADG is used as source clock if SRC was used,
	353	* then, SSI WS is used as destination clock.
	354	* SSI WS is used as source clock if SRC is not used
	355	* (when playback, source/destination become reverse when capture)
	356	*/
28dc4b63 KM	357	ret = 0;
	358	if (convert_rate) {
	359	/* use ADG */
ef749400	360	val = 0;
28dc4b63 KM	361	ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
	362	runtime->rate,
	363	convert_rate);
	364	} else if (8 == id) {
	365	/* use SSI WS, but SRU8 is special */
374a5281	366	val = id << shift;
28dc4b63 KM	367	} else {
28dc4b63 KM	368	/* use SSI WS */
374a5281	369	val = (id + 1) << shift;
28dc4b63 KM	370	}
	371
	372	if (ret < 0)
	373	return ret;
374a5281 KM	374
	375	switch (id / 4) {
	376	case 0:
	377	rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
	378	break;
	379	case 1:
	380	rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
	381	break;
	382	case 2:
	383	rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
	384	break;
	385	}
	386
	387	return 0;
	388	}
	389
1b7b08ef KM	390	static int rsnd_scu_set_convert_rate_gen1(struct rsnd_mod *mod,
	391	struct rsnd_dai *rdai,
	392	struct rsnd_dai_stream *io)
374a5281	393	{
1b7b08ef	394	int ret;
ef749400	395
1b7b08ef KM	396	ret = rsnd_scu_set_convert_rate(mod, rdai, io);
	397	if (ret < 0)
	398	return ret;
ef749400	399
1b7b08ef KM	400	/* Select SRC mode (fixed value) */
1b7b08ef KM	401	rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
ef749400	402
1b7b08ef KM	403	/* Set the restriction value of the FS ratio (98%) */
	404	rsnd_mod_write(mod, SRC_MNFSR,
	405	rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
ef749400	406
1b7b08ef	407	/* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
ef749400	408
374a5281 KM	409	return 0;
	410	}
	411
1b7b08ef KM	412	static int rsnd_scu_init_gen1(struct rsnd_mod *mod,
	413	struct rsnd_dai *rdai,
	414	struct rsnd_dai_stream *io)
07539c1d	415	{
374a5281 KM	416	int ret;
374a5281 KM	417
1b7b08ef	418	ret = rsnd_scu_init(mod, rdai, io);
7b5ce975 KM	419	if (ret < 0)
	420	return ret;
	421
1b7b08ef	422	ret = rsnd_src_set_route_gen1(mod, rdai, io);
374a5281 KM	423	if (ret < 0)
	424	return ret;
	425
1b7b08ef	426	ret = rsnd_scu_set_convert_rate_gen1(mod, rdai, io);
374a5281 KM	427	if (ret < 0)
374a5281 KM	428	return ret;
07539c1d	429
28dc4b63 KM	430	ret = rsnd_scu_set_convert_timing_gen1(mod, rdai, io);
	431	if (ret < 0)
	432	return ret;
	433
a204d90c KM	434	return 0;
	435	}
	436
1b7b08ef KM	437	static int rsnd_scu_start_gen1(struct rsnd_mod *mod,
	438	struct rsnd_dai *rdai,
	439	struct rsnd_dai_stream *io)
a204d90c	440	{
1b7b08ef	441	int id = rsnd_mod_id(mod);
a204d90c	442
1b7b08ef	443	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
374a5281	444
1b7b08ef	445	return rsnd_scu_start(mod, rdai, io);
07539c1d KM	446	}
07539c1d KM	447
1b7b08ef KM	448	static int rsnd_scu_stop_gen1(struct rsnd_mod *mod,
	449	struct rsnd_dai *rdai,
	450	struct rsnd_dai_stream *io)
a204d90c	451	{
e7ce74ea	452	int id = rsnd_mod_id(mod);
a204d90c	453
1b7b08ef	454	rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
e7ce74ea	455
1b7b08ef	456	return rsnd_scu_stop(mod, rdai, io);
a204d90c KM	457	}
a204d90c KM	458
1b7b08ef KM	459	static struct rsnd_mod_ops rsnd_scu_gen1_ops = {
	460	.name = "sru (gen1)",
	461	.init = rsnd_scu_init_gen1,
	462	.quit = rsnd_scu_quit,
	463	.start = rsnd_scu_start_gen1,
	464	.stop = rsnd_scu_stop_gen1,
	465	};
e7ce74ea	466
1b7b08ef KM	467	static struct rsnd_mod_ops rsnd_scu_non_gen1_ops = {
	468	.name = "non-sru (gen1)",
	469	.init = rsnd_scu_ssi_mode_init,
	470	};
ef749400	471
1b7b08ef KM	472	/*
	473	* Gen2 functions
	474	*/
	475	static int rsnd_scu_start_non_gen2(struct rsnd_mod *mod,
	476	struct rsnd_dai *rdai,
	477	struct rsnd_dai_stream *io)
	478	{
	479	/* enable PIO interrupt */
	480	rsnd_mod_write(mod, INT_ENABLE, 0x0f000000);
ef749400	481
ef749400 KM	482	return 0;
	483	}
	484
1b7b08ef KM	485	static struct rsnd_mod_ops rsnd_scu_non_gen2_ops = {
1b7b08ef KM	486	.name = "non-scu (gen2)",
7b5ce975	487	.init = rsnd_scu_ssi_mode_init,
1b7b08ef	488	.start = rsnd_scu_start_non_gen2,
013f38fe KM	489	};
013f38fe KM	490
07539c1d KM	491	struct rsnd_mod rsnd_scu_mod_get(struct rsnd_priv priv, int id)
07539c1d KM	492	{
8b14719b TI	493	if (WARN_ON(id < 0 \|\| id >= rsnd_scu_nr(priv)))
8b14719b TI	494	id = 0;
07539c1d KM	495
	496	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
	497	}
	498
	499	int rsnd_scu_probe(struct platform_device *pdev,
	500	struct rcar_snd_info *info,
	501	struct rsnd_priv *priv)
	502	{
	503	struct device *dev = rsnd_priv_to_dev(priv);
	504	struct rsnd_scu *scu;
013f38fe	505	struct rsnd_mod_ops *ops;
ef749400 KM	506	struct clk *clk;
ef749400 KM	507	char name[RSND_SCU_NAME_SIZE];
07539c1d KM	508	int i, nr;
	509
	510	/*
	511	* init SCU
	512	*/
	513	nr = info->scu_info_nr;
	514	scu = devm_kzalloc(dev, sizeof(scu) nr, GFP_KERNEL);
	515	if (!scu) {
	516	dev_err(dev, "SCU allocate failed\n");
	517	return -ENOMEM;
	518	}
	519
	520	priv->scu_nr = nr;
	521	priv->scu = scu;
	522
	523	for_each_rsnd_scu(scu, priv, i) {
ef749400 KM	524	snprintf(name, RSND_SCU_NAME_SIZE, "scu.%d", i);
	525
	526	clk = devm_clk_get(dev, name);
	527	if (IS_ERR(clk))
	528	return PTR_ERR(clk);
	529
07539c1d	530	scu->info = &info->scu_info[i];
ef749400	531	scu->clk = clk;
07539c1d	532
013f38fe	533	ops = &rsnd_scu_non_ops;
1b7b08ef KM	534	if (rsnd_scu_hpbif_is_enable(scu)) {
	535	if (rsnd_is_gen1(priv))
	536	ops = &rsnd_scu_gen1_ops;
	537	} else {
	538	if (rsnd_is_gen1(priv))
	539	ops = &rsnd_scu_non_gen1_ops;
	540	if (rsnd_is_gen2(priv))
	541	ops = &rsnd_scu_non_gen2_ops;
	542	}
013f38fe KM	543
	544	rsnd_mod_init(priv, &scu->mod, ops, i);
	545
374a5281 KM	546	dev_dbg(dev, "SCU%d probed\n", i);
374a5281 KM	547	}
07539c1d KM	548	dev_dbg(dev, "scu probed\n");
	549
	550	return 0;
	551	}
	552
	553	void rsnd_scu_remove(struct platform_device *pdev,
	554	struct rsnd_priv *priv)
	555	{
	556	}