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path: root/sound/soc/sh/rcar/ssi.c
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Diffstat (limited to 'sound/soc/sh/rcar/ssi.c')
-rw-r--r--sound/soc/sh/rcar/ssi.c160
1 files changed, 114 insertions, 46 deletions
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 7bb9c087f3dc..2fbe59f7f9b5 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -66,6 +66,7 @@ struct rsnd_ssi {
u32 cr_own;
u32 cr_clk;
+ int chan;
int err;
unsigned int usrcnt;
};
@@ -80,16 +81,15 @@ struct rsnd_ssi {
#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
#define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma))
#define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0)
-#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent)
+#define rsnd_ssi_parent(ssi) ((ssi)->parent)
#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
#define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id)
#define rsnd_ssi_of_node(priv) \
of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi")
-int rsnd_ssi_use_busif(struct rsnd_mod *mod)
+int rsnd_ssi_use_busif(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
int use_busif = 0;
if (!rsnd_ssi_is_dma_mode(mod))
@@ -189,22 +189,26 @@ static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
rsnd_mod_hw_start(&ssi->mod);
if (rsnd_rdai_is_clk_master(rdai)) {
- if (rsnd_ssi_clk_from_parent(ssi))
- rsnd_ssi_hw_start(ssi->parent, io);
+ struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
+
+ if (ssi_parent)
+ rsnd_ssi_hw_start(ssi_parent, io);
else
rsnd_ssi_master_clk_start(ssi, io);
}
}
- cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ?
- DMEN : /* DMA : enable DMA */
- DIEN; /* PIO : enable Data interrupt */
-
+ if (rsnd_ssi_is_dma_mode(&ssi->mod)) {
+ cr_mode = UIEN | OIEN | /* over/under run */
+ DMEN; /* DMA : enable DMA */
+ } else {
+ cr_mode = DIEN; /* PIO : enable Data interrupt */
+ }
cr = ssi->cr_own |
ssi->cr_clk |
cr_mode |
- UIEN | OIEN | EN;
+ EN;
rsnd_mod_write(&ssi->mod, SSICR, cr);
@@ -221,16 +225,17 @@ static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
}
-static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi)
+static void rsnd_ssi_hw_stop(struct rsnd_dai_stream *io, struct rsnd_ssi *ssi)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct device *dev = rsnd_priv_to_dev(priv);
u32 cr;
- if (0 == ssi->usrcnt) /* stop might be called without start */
+ if (0 == ssi->usrcnt) {
+ dev_err(dev, "%s called without starting\n", __func__);
return;
+ }
ssi->usrcnt--;
@@ -253,13 +258,17 @@ static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi)
rsnd_ssi_status_check(&ssi->mod, IIRQ);
if (rsnd_rdai_is_clk_master(rdai)) {
- if (rsnd_ssi_clk_from_parent(ssi))
- rsnd_ssi_hw_stop(ssi->parent);
+ struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
+
+ if (ssi_parent)
+ rsnd_ssi_hw_stop(io, ssi_parent);
else
rsnd_ssi_master_clk_stop(ssi);
}
rsnd_mod_hw_stop(&ssi->mod);
+
+ ssi->chan = 0;
}
dev_dbg(dev, "%s[%d] hw stopped\n",
@@ -270,10 +279,10 @@ static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi)
* SSI mod common functions
*/
static int rsnd_ssi_init(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 cr;
@@ -321,6 +330,7 @@ static int rsnd_ssi_init(struct rsnd_mod *mod,
}
static int rsnd_ssi_quit(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
@@ -336,6 +346,37 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod,
return 0;
}
+static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
+ int chan = params_channels(params);
+
+ /*
+ * Already working.
+ * It will happen if SSI has parent/child connection.
+ */
+ if (ssi->usrcnt) {
+ /*
+ * it is error if child <-> parent SSI uses
+ * different channels.
+ */
+ if (ssi->chan != chan)
+ return -EIO;
+ }
+
+ /* It will be removed on rsnd_ssi_hw_stop */
+ ssi->chan = chan;
+ if (ssi_parent)
+ return rsnd_ssi_hw_params(&ssi_parent->mod, io,
+ substream, params);
+
+ return 0;
+}
+
static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
{
/* under/over flow error */
@@ -348,12 +389,12 @@ static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
}
static int rsnd_ssi_start(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
- rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod));
+ rsnd_src_ssiu_start(mod, io, rsnd_ssi_use_busif(io, mod));
rsnd_ssi_hw_start(ssi, io);
@@ -363,6 +404,7 @@ static int rsnd_ssi_start(struct rsnd_mod *mod,
}
static int rsnd_ssi_stop(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
@@ -371,24 +413,29 @@ static int rsnd_ssi_stop(struct rsnd_mod *mod,
rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
- rsnd_ssi_hw_stop(ssi);
+ rsnd_ssi_hw_stop(io, ssi);
- rsnd_src_ssiu_stop(mod);
+ rsnd_src_ssiu_stop(mod, io);
return 0;
}
-static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
+static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io)
{
- struct rsnd_ssi *ssi = data;
- struct rsnd_mod *mod = &ssi->mod;
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
int is_dma = rsnd_ssi_is_dma_mode(mod);
- u32 status = rsnd_mod_read(mod, SSISR);
+ u32 status;
+ bool elapsed = false;
+
+ spin_lock(&priv->lock);
+
+ /* ignore all cases if not working */
+ if (!rsnd_io_is_working(io))
+ goto rsnd_ssi_interrupt_out;
- if (!io)
- return IRQ_NONE;
+ status = rsnd_mod_read(mod, SSISR);
/* PIO only */
if (!is_dma && (status & DIRQ)) {
@@ -406,11 +453,11 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
else
*buf = rsnd_mod_read(mod, SSIRDR);
- rsnd_dai_pointer_update(io, sizeof(*buf));
+ elapsed = rsnd_dai_pointer_update(io, sizeof(*buf));
}
- /* PIO / DMA */
- if (status & (UIRQ | OIRQ)) {
+ /* DMA only */
+ if (is_dma && (status & (UIRQ | OIRQ))) {
struct device *dev = rsnd_priv_to_dev(priv);
/*
@@ -419,15 +466,28 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
dev_dbg(dev, "%s[%d] restart\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
- rsnd_ssi_stop(mod, priv);
+ rsnd_ssi_stop(mod, io, priv);
if (ssi->err < 1024)
- rsnd_ssi_start(mod, priv);
+ rsnd_ssi_start(mod, io, priv);
else
dev_warn(dev, "no more SSI restart\n");
}
rsnd_ssi_record_error(ssi, status);
+rsnd_ssi_interrupt_out:
+ spin_unlock(&priv->lock);
+
+ if (elapsed)
+ rsnd_dai_period_elapsed(io);
+}
+
+static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
+{
+ struct rsnd_mod *mod = data;
+
+ rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
+
return IRQ_HANDLED;
}
@@ -435,6 +495,7 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
* SSI PIO
*/
static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
@@ -444,7 +505,7 @@ static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
ret = devm_request_irq(dev, ssi->info->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
- dev_name(dev), ssi);
+ dev_name(dev), mod);
return ret;
}
@@ -456,9 +517,11 @@ static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_start,
.stop = rsnd_ssi_stop,
+ .hw_params = rsnd_ssi_hw_params,
};
static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
@@ -469,25 +532,26 @@ static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
ret = devm_request_irq(dev, ssi->info->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
- dev_name(dev), ssi);
+ dev_name(dev), mod);
if (ret)
return ret;
ret = rsnd_dma_init(
- priv, rsnd_mod_to_dma(mod),
+ io, rsnd_mod_to_dma(mod),
dma_id);
return ret;
}
static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int irq = ssi->info->irq;
- rsnd_dma_quit(rsnd_mod_to_dma(mod));
+ rsnd_dma_quit(io, rsnd_mod_to_dma(mod));
/* PIO will request IRQ again */
devm_free_irq(dev, irq, ssi);
@@ -496,6 +560,7 @@ static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
}
static int rsnd_ssi_fallback(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
@@ -516,37 +581,39 @@ static int rsnd_ssi_fallback(struct rsnd_mod *mod,
}
static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
- rsnd_dma_start(dma);
+ rsnd_dma_start(io, dma);
- rsnd_ssi_start(mod, priv);
+ rsnd_ssi_start(mod, io, priv);
return 0;
}
static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
- rsnd_ssi_stop(mod, priv);
+ rsnd_ssi_stop(mod, io, priv);
- rsnd_dma_stop(dma);
+ rsnd_dma_stop(io, dma);
return 0;
}
-static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod)
+static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
int is_play = rsnd_io_is_play(io);
char *name;
- if (rsnd_ssi_use_busif(mod))
+ if (rsnd_ssi_use_busif(io, mod))
name = is_play ? "rxu" : "txu";
else
name = is_play ? "rx" : "tx";
@@ -565,6 +632,7 @@ static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
.start = rsnd_ssi_dma_start,
.stop = rsnd_ssi_dma_stop,
.fallback = rsnd_ssi_fallback,
+ .hw_params = rsnd_ssi_hw_params,
};
int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
@@ -598,7 +666,7 @@ int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
}
-static void rsnd_ssi_parent_clk_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi)
+static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi)
{
if (!rsnd_ssi_is_pin_sharing(&ssi->mod))
return;
@@ -728,11 +796,11 @@ int rsnd_ssi_probe(struct platform_device *pdev,
else if (rsnd_ssi_pio_available(ssi))
ops = &rsnd_ssi_pio_ops;
- ret = rsnd_mod_init(&ssi->mod, ops, clk, RSND_MOD_SSI, i);
+ ret = rsnd_mod_init(priv, &ssi->mod, ops, clk, RSND_MOD_SSI, i);
if (ret)
return ret;
- rsnd_ssi_parent_clk_setup(priv, ssi);
+ rsnd_ssi_parent_setup(priv, ssi);
}
return 0;