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ASoC: fsi: Add over/under run error settlement 

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Kuninori Morimoto 2009-12-28 14:09:16 +09:00 committed by Mark Brown
parent 142e8174b3
commit 59c3b003dd
1 changed files with 25 additions and 4 deletions
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29
sound/soc/sh/fsi.c
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@ -67,6 +67,7 @@
/* DOFF_ST */
#define ERR_OVER 0x00000010
#define ERR_UNDER 0x00000001
#define ST_ERR (ERR_OVER | ERR_UNDER)
/* CLK_RST */
#define B_CLK 0x00000010
@ -375,11 +376,12 @@ static int fsi_data_push(struct fsi_priv *fsi)
{
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream = NULL;
u32 status;
int send;
int fifo_free;
int width;
u8 *start;
int i, over_period;
int i, ret, over_period;
if (!fsi ||
!fsi->substream ||
@ -435,23 +437,33 @@ static int fsi_data_push(struct fsi_priv *fsi)
fsi->byte_offset += send * width;
ret = 0;
status = fsi_reg_read(fsi, DOFF_ST);
if (status & ERR_OVER) {
struct snd_soc_dai *dai = fsi_get_dai(substream);
dev_err(dai->dev, "over run error\n");
fsi_reg_write(fsi, DOFF_ST, status & ~ST_ERR);
ret = -EIO;
}
fsi_irq_enable(fsi, 1);
if (over_period)
snd_pcm_period_elapsed(substream);
return 0;
return ret;
}
static int fsi_data_pop(struct fsi_priv *fsi)
{
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream = NULL;
u32 status;
int free;
int fifo_fill;
int width;
u8 *start;
int i, over_period;
int i, ret, over_period;
if (!fsi ||
!fsi->substream ||
@ -506,12 +518,21 @@ static int fsi_data_pop(struct fsi_priv *fsi)
fsi->byte_offset += fifo_fill * width;
ret = 0;
status = fsi_reg_read(fsi, DIFF_ST);
if (status & ERR_UNDER) {
struct snd_soc_dai *dai = fsi_get_dai(substream);
dev_err(dai->dev, "under run error\n");
fsi_reg_write(fsi, DIFF_ST, status & ~ST_ERR);
ret = -EIO;
}
fsi_irq_enable(fsi, 0);
if (over_period)
snd_pcm_period_elapsed(substream);
return 0;
return ret;
}
static irqreturn_t fsi_interrupt(int irq, void *data)