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ASoC: rsnd: add salvage support for under/over flow error on SSI

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L/R channel will be switched if under/over flow error happen on
Renesas R-Car sound device by the HW bugs. Then, HW restart is required
for salvage. This patch add salvage support for SSI.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2014-11-27 08:07:47 +00:00 committed by Mark Brown
parent f0ef0cb84b
commit 4e7d606cd5
1 changed files with 101 additions and 66 deletions
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167
sound/soc/sh/rcar/ssi.c
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@ -202,14 +202,14 @@ static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
}
cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ?
DMEN : /* DMA : use DMA */
UIEN | OIEN | DIEN; /* PIO : enable interrupt */
DMEN : /* DMA : enable DMA */
DIEN; /* PIO : enable Data interrupt */
cr = ssi->cr_own |
ssi->cr_clk |
cr_mode |
EN;
UIEN | OIEN | EN;
rsnd_mod_write(&ssi->mod, SSICR, cr);
@ -355,63 +355,6 @@ static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
/*
* SSI PIO
*/
static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
{
struct rsnd_ssi *ssi = data;
struct rsnd_mod *mod = &ssi->mod;
struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
u32 status = rsnd_mod_read(mod, SSISR);
irqreturn_t ret = IRQ_NONE;
if (io && (status & DIRQ)) {
struct rsnd_dai *rdai = ssi->rdai;
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 *buf = (u32 *)(runtime->dma_area +
rsnd_dai_pointer_offset(io, 0));
rsnd_ssi_record_error(ssi, status);
/*
* 8/16/32 data can be assesse to TDR/RDR register
* directly as 32bit data
* see rsnd_ssi_init()
*/
if (rsnd_dai_is_play(rdai, io))
rsnd_mod_write(mod, SSITDR, *buf);
else
*buf = rsnd_mod_read(mod, SSIRDR);
rsnd_dai_pointer_update(io, sizeof(*buf));
ret = IRQ_HANDLED;
}
return ret;
}
static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int irq = ssi->info->pio_irq;
int ret;
ret = devm_request_irq(dev, irq,
rsnd_ssi_pio_interrupt,
IRQF_SHARED,
dev_name(dev), ssi);
if (ret)
dev_err(dev, "%s[%d] (PIO) request interrupt failed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
else
dev_dbg(dev, "%s[%d] (PIO) is probed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
}
static int rsnd_ssi_start(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
@ -443,6 +386,79 @@ static int rsnd_ssi_stop(struct rsnd_mod *mod,
return 0;
}
static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
{
struct rsnd_ssi *ssi = data;
struct rsnd_dai *rdai = ssi->rdai;
struct rsnd_mod *mod = &ssi->mod;
struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
u32 status = rsnd_mod_read(mod, SSISR);
if (!io)
return IRQ_NONE;
/* PIO only */
if (status & DIRQ) {
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 *buf = (u32 *)(runtime->dma_area +
rsnd_dai_pointer_offset(io, 0));
/*
* 8/16/32 data can be assesse to TDR/RDR register
* directly as 32bit data
* see rsnd_ssi_init()
*/
if (rsnd_dai_is_play(rdai, io))
rsnd_mod_write(mod, SSITDR, *buf);
else
*buf = rsnd_mod_read(mod, SSIRDR);
rsnd_dai_pointer_update(io, sizeof(*buf));
}
/* PIO / DMA */
if (status & (UIRQ | OIRQ)) {
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
/*
* restart SSI
*/
rsnd_ssi_stop(mod, rdai);
rsnd_ssi_start(mod, rdai);
dev_dbg(dev, "%s[%d] restart\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
rsnd_ssi_record_error(ssi, status);
return IRQ_HANDLED;
}
static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int irq = ssi->info->pio_irq;
int ret;
ret = devm_request_irq(dev, irq,
rsnd_ssi_pio_interrupt,
IRQF_SHARED,
dev_name(dev), ssi);
if (ret)
dev_err(dev, "%s[%d] (PIO) request interrupt failed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
else
dev_dbg(dev, "%s[%d] (PIO) is probed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
}
static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
.name = SSI_NAME,
.probe = rsnd_ssi_pio_probe,
@ -461,17 +477,28 @@ static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
int dma_id = ssi->info->dma_id;
int ret;
ret = devm_request_irq(dev, ssi->info->pio_irq,
rsnd_ssi_pio_interrupt,
IRQF_SHARED,
dev_name(dev), ssi);
if (ret)
goto rsnd_ssi_dma_probe_fail;
ret = rsnd_dma_init(
priv, rsnd_mod_to_dma(mod),
rsnd_info_is_playback(priv, ssi),
dma_id);
if (ret)
goto rsnd_ssi_dma_probe_fail;
if (ret < 0)
dev_err(dev, "%s[%d] (DMA) is failed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
else
dev_dbg(dev, "%s[%d] (DMA) is probed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
dev_dbg(dev, "%s[%d] (DMA) is probed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
rsnd_ssi_dma_probe_fail:
dev_err(dev, "%s[%d] (DMA) is failed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
}
@ -479,8 +506,16 @@ static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int irq = ssi->info->pio_irq;
rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));
/* PIO will request IRQ again */
devm_free_irq(dev, irq, ssi);
return 0;
}