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ssp: Add IRQ handler to SSP port 

Add an interrupt handler to slear any SSP IRQs. TODO: extend this to
report XRUNS and other errors.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
This commit is contained in:
Liam Girdwood 2017-09-20 12:38:28 +01:00
parent 5b34187b24
commit 27d354dbde
2 changed files with 28 additions and 1 deletions
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23
src/drivers/ssp.c
View File

@ -370,6 +370,24 @@ static int ssp_trigger(struct dai *dai, int cmd, int direction)
return 0;
}
/* The IRQ handler allows the SSP port to drain the playback FIFO to make sure
* every sample has been played */
static void ssp_irq_handler(void *data)
{
struct dai *dai = data;
int i;
trace_value(ssp_read(dai, SSSR));
/* empty Rx FIFO */
for (i = 0; i < 16; i++)
ssp_read(dai, SSDR);
/* clear IRQ */
ssp_write(dai, SSSR, ssp_read(dai, SSSR));
platform_interrupt_clear(ssp_irq(dai), 1);
}
static int ssp_probe(struct dai *dai)
{
struct ssp_pdata *ssp;
@ -383,6 +401,11 @@ static int ssp_probe(struct dai *dai)
ssp->state[DAI_DIR_PLAYBACK] = COMP_STATE_READY;
ssp->state[DAI_DIR_CAPTURE] = COMP_STATE_READY;
/* register our IRQ handler */
interrupt_register(ssp_irq(dai), ssp_irq_handler, dai);
platform_interrupt_unmask(ssp_irq(dai), 1);
interrupt_enable(ssp_irq(dai));
return 0;
}

6
src/include/reef/ssp.h
View File

@ -78,7 +78,7 @@ extern const struct dai_ops ssp_ops;
#define SSCR0_EDSS (1 << 20)
#define SSCR0_NCS (1 << 21)
#define SSCR0_RIM (1 << 22)
#define SSCR0_TUM (1 << 23)
#define SSCR0_TIM (1 << 23)
#define SSCR0_FRDC(x) ((x - 1) << 24)
#define SSCR0_ACS (1 << 30)
#define SSCR0_MOD (1 << 31)
@ -154,6 +154,10 @@ extern const struct dai_ops ssp_ops;
#define trace_ssp_error(__e) trace_error(TRACE_CLASS_SSP, __e)
#define tracev_ssp(__e) tracev_event(TRACE_CLASS_SSP, __e)
#define ssp_irq(ssp) \
ssp->plat_data.irq
/* SSP private data */
struct ssp_pdata {
uint32_t sscr0;