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Diffstat (limited to 'sound/soc/sh/rcar/scu.c')
-rw-r--r--sound/soc/sh/rcar/scu.c181
1 files changed, 161 insertions, 20 deletions
diff --git a/sound/soc/sh/rcar/scu.c b/sound/soc/sh/rcar/scu.c
index fa8fa15860b..9bb08bb1d45 100644
--- a/sound/soc/sh/rcar/scu.c
+++ b/sound/soc/sh/rcar/scu.c
@@ -13,9 +13,13 @@
struct rsnd_scu {
struct rsnd_scu_platform_info *info; /* rcar_snd.h */
struct rsnd_mod mod;
+ struct clk *clk;
};
#define rsnd_scu_mode_flags(p) ((p)->info->flags)
+#define rsnd_scu_convert_rate(p) ((p)->info->convert_rate)
+
+#define RSND_SCU_NAME_SIZE 16
/*
* ADINR
@@ -26,6 +30,15 @@ struct rsnd_scu {
#define OTBL_18 (6 << 16)
#define OTBL_16 (8 << 16)
+/*
+ * image of SRC (Sampling Rate Converter)
+ *
+ * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
+ * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
+ * 44.1kHz <-> +-----+ +-----+ +-------+
+ * ...
+ *
+ */
#define rsnd_mod_to_scu(_mod) \
container_of((_mod), struct rsnd_scu, mod)
@@ -36,7 +49,8 @@ struct rsnd_scu {
((pos) = (struct rsnd_scu *)(priv)->scu + i); \
i++)
-static int rsnd_scu_set_route(struct rsnd_priv *priv,
+/* Gen1 only */
+static int rsnd_src_set_route_if_gen1(struct rsnd_priv *priv,
struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
@@ -55,7 +69,7 @@ static int rsnd_scu_set_route(struct rsnd_priv *priv,
{ 0x3, 28, }, /* 7 */
{ 0x3, 30, }, /* 8 */
};
-
+ struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
u32 mask;
u32 val;
int shift;
@@ -85,9 +99,18 @@ static int rsnd_scu_set_route(struct rsnd_priv *priv,
*/
shift = (id % 4) * 8;
mask = 0x1F << shift;
- if (8 == id) /* SRU8 is very special */
+
+ /*
+ * 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
+ else /* use SSI WS */
val = (id + 1) << shift;
switch (id / 4) {
@@ -105,30 +128,45 @@ static int rsnd_scu_set_route(struct rsnd_priv *priv,
return 0;
}
-static int rsnd_scu_set_mode(struct rsnd_priv *priv,
- struct rsnd_mod *mod,
- struct rsnd_dai *rdai,
- struct rsnd_dai_stream *io)
+unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv,
+ struct rsnd_mod *ssi_mod,
+ struct snd_pcm_runtime *runtime)
{
- int id = rsnd_mod_id(mod);
- u32 val;
+ struct rsnd_scu *scu;
+ unsigned int rate;
- if (rsnd_is_gen1(priv)) {
- val = (1 << id);
- rsnd_mod_bset(mod, SRC_CTRL, val, val);
- }
+ /* 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 0;
+ /*
+ * 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_hpbif(struct rsnd_priv *priv,
+static int rsnd_scu_convert_rate_ctrl(struct rsnd_priv *priv,
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;
+ /* 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;
@@ -139,9 +177,81 @@ static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
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, BUSIF_MODE, 1);
- rsnd_mod_write(mod, BUSIF_ADINR, adinr);
+
+ return 0;
+}
+
+static int rsnd_scu_transfer_start(struct rsnd_priv *priv,
+ struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
+ int id = rsnd_mod_id(mod);
+ u32 val;
+
+ if (rsnd_is_gen1(priv)) {
+ val = (1 << id);
+ rsnd_mod_bset(mod, SRC_ROUTE_CTRL, val, val);
+ }
+
+ if (rsnd_scu_convert_rate(scu))
+ rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
+
+ return 0;
+}
+
+static int rsnd_scu_transfer_stop(struct rsnd_priv *priv,
+ struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
+ int id = rsnd_mod_id(mod);
+ u32 mask;
+
+ if (rsnd_is_gen1(priv)) {
+ mask = (1 << id);
+ rsnd_mod_bset(mod, SRC_ROUTE_CTRL, mask, 0);
+ }
+
+ if (rsnd_scu_convert_rate(scu))
+ rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
return 0;
}
@@ -159,6 +269,7 @@ static int rsnd_scu_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int ret;
@@ -173,16 +284,19 @@ static int rsnd_scu_start(struct rsnd_mod *mod,
return 0;
}
+ clk_enable(scu->clk);
+
/* it use DMA transter */
- ret = rsnd_scu_set_route(priv, mod, rdai, io);
+
+ ret = rsnd_src_set_route_if_gen1(priv, mod, rdai, io);
if (ret < 0)
return ret;
- ret = rsnd_scu_set_mode(priv, mod, rdai, io);
+ ret = rsnd_scu_convert_rate_ctrl(priv, mod, rdai, io);
if (ret < 0)
return ret;
- ret = rsnd_scu_set_hpbif(priv, mod, rdai, io);
+ ret = rsnd_scu_transfer_start(priv, mod, rdai, io);
if (ret < 0)
return ret;
@@ -191,9 +305,27 @@ static int rsnd_scu_start(struct rsnd_mod *mod,
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);
+
+ if (!rsnd_scu_hpbif_is_enable(mod))
+ return 0;
+
+ rsnd_scu_transfer_stop(priv, mod, rdai, io);
+
+ clk_disable(scu->clk);
+
+ return 0;
+}
+
static struct rsnd_mod_ops rsnd_scu_ops = {
.name = "scu",
.start = rsnd_scu_start,
+ .stop = rsnd_scu_stop,
};
struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id)
@@ -210,6 +342,8 @@ int rsnd_scu_probe(struct platform_device *pdev,
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_scu *scu;
+ struct clk *clk;
+ char name[RSND_SCU_NAME_SIZE];
int i, nr;
/*
@@ -226,9 +360,16 @@ int rsnd_scu_probe(struct platform_device *pdev,
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);
+
rsnd_mod_init(priv, &scu->mod,
&rsnd_scu_ops, i);
scu->info = &info->scu_info[i];
+ scu->clk = clk;
dev_dbg(dev, "SCU%d probed\n", i);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-13 16:05:28 +0000