Commit 629509c5 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

ASoC: rsnd: add Gen2 SRC and DMAEngine support 



Renesas sound Gen2 has SRC (= Sampling Rate Converter)
which needs 2 DMAC.
The data path image when you use SRC on Gen2 is

[mem] -> Audio-DMAC -> SRC -> Audio-DMAC-peri-peri -> SSIU -> SSI

This patch support SRC and DMAEnine.
It is tested on R-Car H2 Lager board

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent eb854f6d

include/sound/rcar_snd.h

+6 −0
Original line number Diff line number Diff line
@@ -56,9 +56,15 @@ struct rsnd_ssi_platform_info { 
 */

#define RSND_SCU_USE_HPBIF		(1 << 31) /* it needs RSND_SSI_DEPENDENT */



#define RSND_SCU_SET(rate, _dma_id)		\

	{ .flags = RSND_SCU_USE_HPBIF, .convert_rate = rate, .dma_id = _dma_id, }

#define RSND_SCU_UNUSED				\

	{ .flags = 0, .convert_rate = 0, .dma_id = 0, }



struct rsnd_scu_platform_info {

	u32 flags;

	u32 convert_rate; /* sampling rate convert */

	int dma_id; /* for Gen2 SCU */

};



/*

sound/soc/sh/rcar/adg.c

+138 −0
Original line number Diff line number Diff line
@@ -30,6 +30,144 @@ struct rsnd_adg { 
	     i++, (pos) = adg->clk[i])

#define rsnd_priv_to_adg(priv) ((struct rsnd_adg *)(priv)->adg)





static u32 rsnd_adg_ssi_ws_timing_gen2(struct rsnd_mod *mod)

{

	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);

	int id = rsnd_mod_id(mod);

	int ws = id;



	if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) {

		switch (id) {

		case 1:

		case 2:

			ws = 0;

			break;

		case 4:

			ws = 3;

			break;

		case 8:

			ws = 7;

			break;

		}

	}



	return (0x6 + ws) << 8;

}



static int rsnd_adg_set_src_timsel_gen2(struct rsnd_dai *rdai,

					struct rsnd_mod *mod,

					struct rsnd_dai_stream *io,

					u32 timsel)

{

	int is_play = rsnd_dai_is_play(rdai, io);

	int id = rsnd_mod_id(mod);

	int shift = (id % 2) ? 16 : 0;

	u32 mask, ws;

	u32 in, out;



	ws = rsnd_adg_ssi_ws_timing_gen2(mod);



	in  = (is_play) ? timsel : ws;

	out = (is_play) ? ws     : timsel;



	in   = in	<< shift;

	out  = out	<< shift;

	mask = 0xffff	<< shift;



	switch (id / 2) {

	case 0:

		rsnd_mod_bset(mod, SRCIN_TIMSEL0,  mask, in);

		rsnd_mod_bset(mod, SRCOUT_TIMSEL0, mask, out);

		break;

	case 1:

		rsnd_mod_bset(mod, SRCIN_TIMSEL1,  mask, in);

		rsnd_mod_bset(mod, SRCOUT_TIMSEL1, mask, out);

		break;

	case 2:

		rsnd_mod_bset(mod, SRCIN_TIMSEL2,  mask, in);

		rsnd_mod_bset(mod, SRCOUT_TIMSEL2, mask, out);

		break;

	case 3:

		rsnd_mod_bset(mod, SRCIN_TIMSEL3,  mask, in);

		rsnd_mod_bset(mod, SRCOUT_TIMSEL3, mask, out);

		break;

	case 4:

		rsnd_mod_bset(mod, SRCIN_TIMSEL4,  mask, in);

		rsnd_mod_bset(mod, SRCOUT_TIMSEL4, mask, out);

		break;

	}



	return 0;

}



int rsnd_adg_set_convert_clk_gen2(struct rsnd_mod *mod,

				  struct rsnd_dai *rdai,

				  struct rsnd_dai_stream *io,

				  unsigned int src_rate,

				  unsigned int dst_rate)

{

	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);

	struct rsnd_adg *adg = rsnd_priv_to_adg(priv);

	struct device *dev = rsnd_priv_to_dev(priv);

	int idx, sel, div, step;

	u32 val;

	unsigned int min, diff;

	unsigned int sel_rate [] = {

		clk_get_rate(adg->clk[CLKA]),	/* 0000: CLKA */

		clk_get_rate(adg->clk[CLKB]),	/* 0001: CLKB */

		clk_get_rate(adg->clk[CLKC]),	/* 0010: CLKC */

		adg->rbga_rate_for_441khz_div_6,/* 0011: RBGA */

		adg->rbgb_rate_for_48khz_div_6,	/* 0100: RBGB */

	};



	min = ~0;

	val = 0;

	for (sel = 0; sel < ARRAY_SIZE(sel_rate); sel++) {

		idx = 0;

		step = 2;



		if (!sel_rate[sel])

			continue;



		for (div = 2; div <= 98304; div += step) {

			diff = abs(src_rate - sel_rate[sel] / div);

			if (min > diff) {

				val = (sel << 8) | idx;

				min = diff;

			}



			/*

			 * step of 0_0000 / 0_0001 / 0_1101

			 * are out of order

			 */

			if ((idx > 2) && (idx % 2))

				step *= 2;

			if (idx == 0x1c) {

				div += step;

				step *= 2;

			}

			idx++;

		}

	}



	if (min == ~0) {

		dev_err(dev, "no Input clock\n");

		return -EIO;

	}



	return rsnd_adg_set_src_timsel_gen2(rdai, mod, io, val);

}



int rsnd_adg_set_convert_timing_gen2(struct rsnd_mod *mod,

				     struct rsnd_dai *rdai,

				     struct rsnd_dai_stream *io)

{

	u32 val = rsnd_adg_ssi_ws_timing_gen2(mod);



	return rsnd_adg_set_src_timsel_gen2(rdai, mod, io, val);

}



int rsnd_adg_set_convert_clk_gen1(struct rsnd_priv *priv,

				  struct rsnd_mod *mod,

				  unsigned int src_rate,

sound/soc/sh/rcar/gen.c

+26 −0
Original line number Diff line number Diff line
@@ -229,14 +229,40 @@ static int rsnd_gen2_regmap_init(struct rsnd_priv *priv, struct rsnd_gen *gen) 
		RSND_GEN2_S_REG(gen, SSIU,	SSI_MODE0,	0x800),

		RSND_GEN2_S_REG(gen, SSIU,	SSI_MODE1,	0x804),

		/* FIXME: it needs SSI_MODE2/3 in the future */

		RSND_GEN2_S_REG(gen, SSIU,	SSI_CONTROL,	0x810),

		RSND_GEN2_M_REG(gen, SSIU,	SSI_BUSIF_MODE,	0x0,	0x80),

		RSND_GEN2_M_REG(gen, SSIU,	SSI_BUSIF_ADINR,0x4,	0x80),

		RSND_GEN2_M_REG(gen, SSIU,	SSI_CTRL,	0x10,	0x80),

		RSND_GEN2_M_REG(gen, SSIU,	INT_ENABLE,	0x18,	0x80),



		RSND_GEN2_M_REG(gen, SCU,	SRC_BUSIF_MODE,	0x0,	0x20),

		RSND_GEN2_M_REG(gen, SCU,	SRC_ROUTE_MODE0,0xc,	0x20),

		RSND_GEN2_M_REG(gen, SCU,	SRC_CTRL,	0x10,	0x20),

		RSND_GEN2_M_REG(gen, SCU,	SRC_SWRSR,	0x200,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_SRCIR,	0x204,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_ADINR,	0x214,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_IFSCR,	0x21c,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_IFSVR,	0x220,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_SRCCR,	0x224,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_BSDSR,	0x22c,	0x40),

		RSND_GEN2_M_REG(gen, SCU,	SRC_BSISR,	0x238,	0x40),



		RSND_GEN2_S_REG(gen, ADG,	BRRA,		0x00),

		RSND_GEN2_S_REG(gen, ADG,	BRRB,		0x04),

		RSND_GEN2_S_REG(gen, ADG,	SSICKR,		0x08),

		RSND_GEN2_S_REG(gen, ADG,	AUDIO_CLK_SEL0,	0x0c),

		RSND_GEN2_S_REG(gen, ADG,	AUDIO_CLK_SEL1,	0x10),

		RSND_GEN2_S_REG(gen, ADG,	AUDIO_CLK_SEL2,	0x14),

		RSND_GEN2_S_REG(gen, ADG,	SRCIN_TIMSEL0,	0x34),

		RSND_GEN2_S_REG(gen, ADG,	SRCIN_TIMSEL1,	0x38),

		RSND_GEN2_S_REG(gen, ADG,	SRCIN_TIMSEL2,	0x3c),

		RSND_GEN2_S_REG(gen, ADG,	SRCIN_TIMSEL3,	0x40),

		RSND_GEN2_S_REG(gen, ADG,	SRCIN_TIMSEL4,	0x44),

		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL0,	0x48),

		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL1,	0x4c),

		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL2,	0x50),

		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL3,	0x54),

		RSND_GEN2_S_REG(gen, ADG,	SRCOUT_TIMSEL4,	0x58),



		RSND_GEN2_M_REG(gen, SSI,	SSICR,		0x00,	0x40),

		RSND_GEN2_M_REG(gen, SSI,	SSISR,		0x04,	0x40),

sound/soc/sh/rcar/rsnd.h

+25 −0
Original line number Diff line number Diff line
@@ -37,6 +37,11 @@ enum rsnd_reg { 
	RSND_REG_SRC_TMG_SEL1,		/* for Gen1 */

	RSND_REG_SRC_TMG_SEL2,		/* for Gen1 */

	RSND_REG_SRC_ROUTE_CTRL,	/* for Gen1 */

	RSND_REG_SRC_CTRL,		/* for Gen2 */

	RSND_REG_SSI_CTRL,		/* for Gen2 */

	RSND_REG_SSI_CONTROL,

	RSND_REG_SSI_BUSIF_MODE,	/* for Gen2 */

	RSND_REG_SSI_BUSIF_ADINR,	/* for Gen2 */

	RSND_REG_SSI_MODE0,

	RSND_REG_SSI_MODE1,

	RSND_REG_INT_ENABLE,		/* for Gen2 */
@@ -49,6 +54,8 @@ enum rsnd_reg { 
	RSND_REG_SRC_IFSVR,

	RSND_REG_SRC_SRCCR,

	RSND_REG_SRC_MNFSR,		/* for Gen1 */

	RSND_REG_SRC_BSDSR,		/* for Gen2 */

	RSND_REG_SRC_BSISR,		/* for Gen2 */



	/* ADG */

	RSND_REG_BRRA,
@@ -60,6 +67,16 @@ enum rsnd_reg { 
	RSND_REG_AUDIO_CLK_SEL3,	/* for Gen1 */

	RSND_REG_AUDIO_CLK_SEL4,	/* for Gen1 */

	RSND_REG_AUDIO_CLK_SEL5,	/* for Gen1 */

	RSND_REG_SRCIN_TIMSEL0,		/* for Gen2 */

	RSND_REG_SRCIN_TIMSEL1,		/* for Gen2 */

	RSND_REG_SRCIN_TIMSEL2,		/* for Gen2 */

	RSND_REG_SRCIN_TIMSEL3,		/* for Gen2 */

	RSND_REG_SRCIN_TIMSEL4,		/* for Gen2 */

	RSND_REG_SRCOUT_TIMSEL0,	/* for Gen2 */

	RSND_REG_SRCOUT_TIMSEL1,	/* for Gen2 */

	RSND_REG_SRCOUT_TIMSEL2,	/* for Gen2 */

	RSND_REG_SRCOUT_TIMSEL3,	/* for Gen2 */

	RSND_REG_SRCOUT_TIMSEL4,	/* for Gen2 */



	/* SSI */

	RSND_REG_SSICR,
@@ -250,6 +267,14 @@ int rsnd_adg_set_convert_clk_gen1(struct rsnd_priv *priv, 
				  struct rsnd_mod *mod,

				  unsigned int src_rate,

				  unsigned int dst_rate);

int rsnd_adg_set_convert_clk_gen2(struct rsnd_mod *mod,

				  struct rsnd_dai *rdai,

				  struct rsnd_dai_stream *io,

				  unsigned int src_rate,

				  unsigned int dst_rate);

int rsnd_adg_set_convert_timing_gen2(struct rsnd_mod *mod,

				     struct rsnd_dai *rdai,

				     struct rsnd_dai_stream *io);



/*

 *	R-Car sound priv

sound/soc/sh/rcar/scu.c

+117 −0
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ struct rsnd_scu { 
	container_of((_mod), struct rsnd_scu, mod)

#define rsnd_scu_hpbif_is_enable(scu)	\

	(rsnd_scu_mode_flags(scu) & RSND_SCU_USE_HPBIF)

#define rsnd_scu_dma_available(scu) \

	rsnd_dma_available(rsnd_mod_to_dma(&(scu)->mod))



#define for_each_rsnd_scu(pos, priv, i)				\

	for ((i) = 0;						\
@@ -472,6 +474,103 @@ static struct rsnd_mod_ops rsnd_scu_non_gen1_ops = { 
/*

 *		Gen2 functions

 */

static int rsnd_scu_set_convert_rate_gen2(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;



	rsnd_mod_write(mod, SSI_BUSIF_ADINR, rsnd_mod_read(mod, SRC_ADINR));

	rsnd_mod_write(mod, SSI_BUSIF_MODE,  rsnd_mod_read(mod, SRC_BUSIF_MODE));



	rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);



	rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);

	rsnd_mod_write(mod, SRC_BSISR, 0x00100060);



	return 0;

}



static int rsnd_scu_set_convert_timing_gen2(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);

	int ret;



	if (convert_rate)

		ret = rsnd_adg_set_convert_clk_gen2(mod, rdai, io,

						    runtime->rate,

						    convert_rate);

	else

		ret = rsnd_adg_set_convert_timing_gen2(mod, rdai, io);



	return ret;

}



static int rsnd_scu_init_gen2(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_scu_set_convert_rate_gen2(mod, rdai, io);

	if (ret < 0)

		return ret;



	ret = rsnd_scu_set_convert_timing_gen2(mod, rdai, io);

	if (ret < 0)

		return ret;



	return 0;

}



static int rsnd_scu_start_gen2(struct rsnd_mod *mod,

			       struct rsnd_dai *rdai,

			       struct rsnd_dai_stream *io)

{

	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);



	rsnd_dma_start(rsnd_mod_to_dma(&scu->mod));



	rsnd_mod_write(mod, SSI_CTRL, 0x1);

	rsnd_mod_write(mod, SRC_CTRL, 0x11);



	return rsnd_scu_start(mod, rdai, io);

}



static int rsnd_scu_stop_gen2(struct rsnd_mod *mod,

			      struct rsnd_dai *rdai,

			      struct rsnd_dai_stream *io)

{

	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);



	rsnd_mod_write(mod, SSI_CTRL, 0);

	rsnd_mod_write(mod, SRC_CTRL, 0);



	rsnd_dma_stop(rsnd_mod_to_dma(&scu->mod));



	return rsnd_scu_stop(mod, rdai, io);

}



static struct rsnd_mod_ops rsnd_scu_gen2_ops = {

	.name	= "scu (gen2)",

	.init	= rsnd_scu_init_gen2,

	.quit	= rsnd_scu_quit,

	.start	= rsnd_scu_start_gen2,

	.stop	= rsnd_scu_stop_gen2,

};



static int rsnd_scu_start_non_gen2(struct rsnd_mod *mod,

				   struct rsnd_dai *rdai,

				   struct rsnd_dai_stream *io)
@@ -534,6 +633,17 @@ int rsnd_scu_probe(struct platform_device *pdev, 
		if (rsnd_scu_hpbif_is_enable(scu)) {

			if (rsnd_is_gen1(priv))

				ops = &rsnd_scu_gen1_ops;

			if (rsnd_is_gen2(priv)) {

				struct rsnd_mod *ssi = rsnd_ssi_mod_get(priv, i);

				int ret = rsnd_dma_init(priv,

						rsnd_mod_to_dma(&scu->mod),

						rsnd_ssi_is_play(ssi),

						scu->info->dma_id);

				if (ret < 0)

					return ret;



				ops = &rsnd_scu_gen2_ops;

			}

		} else {

			if (rsnd_is_gen1(priv))

				ops = &rsnd_scu_non_gen1_ops;
@@ -553,4 +663,11 @@ int rsnd_scu_probe(struct platform_device *pdev, 
void rsnd_scu_remove(struct platform_device *pdev,

		     struct rsnd_priv *priv)

{

	struct rsnd_scu *scu;

	int i;



	for_each_rsnd_scu(scu, priv, i) {

		if (rsnd_scu_dma_available(scu))

			rsnd_dma_quit(priv, rsnd_mod_to_dma(&scu->mod));

	}

}

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