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ASoC: rsnd: add Gen2 SRC and DMAEngine support
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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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
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Kuninori Morimoto authored and Mark Brown committed Feb 3, 2014
1 parent eb854f6 commit 629509c
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Showing 5 changed files with 312 additions and 0 deletions.
6 changes: 6 additions & 0 deletions include/sound/rcar_snd.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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 */
};

/*
Expand Down
138 changes: 138 additions & 0 deletions sound/soc/sh/rcar/adg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down
26 changes: 26 additions & 0 deletions sound/soc/sh/rcar/gen.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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),
Expand Down
25 changes: 25 additions & 0 deletions sound/soc/sh/rcar/rsnd.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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 */
Expand All @@ -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,
Expand All @@ -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,
Expand Down Expand Up @@ -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
Expand Down
117 changes: 117 additions & 0 deletions sound/soc/sh/rcar/scu.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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; \
Expand Down Expand Up @@ -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)
Expand Down Expand Up @@ -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;
Expand All @@ -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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