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ASoC: Intel: Add helper to poll register for DSP status

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This patch adds helper to poll register for DSP status.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Kp, Jeeja <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Subhransu S. Prusty 2015-07-09 21:38:52 +05:30 committed by Mark Brown
parent 0505700104
commit 7a2c52b61f
2 changed files with 45 additions and 0 deletions
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43
sound/soc/intel/common/sst-dsp.c
View File

@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/delay.h>
#include "sst-dsp.h"
#include "sst-dsp-priv.h"
@ -222,6 +223,48 @@ int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
}
EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
u32 target, u32 timeout, char *operation)
{
int time, ret;
u32 reg;
bool done = false;
/*
* we will poll for couple of ms using mdelay, if not successful
* then go to longer sleep using usleep_range
*/
/* check if set state successful */
for (time = 0; time < 5; time++) {
if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) {
done = true;
break;
}
mdelay(1);
}
if (done == false) {
/* sleeping in 10ms steps so adjust timeout value */
timeout /= 10;
for (time = 0; time < timeout; time++) {
if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target)
break;
usleep_range(5000, 10000);
}
}
reg = sst_dsp_shim_read_unlocked(ctx, offset);
dev_info(ctx->dev, "FW Poll Status: reg=%#x %s %s\n", reg, operation,
(time < timeout) ? "successful" : "timedout");
ret = time < timeout ? 0 : -ETIME;
return ret;
}
EXPORT_SYMBOL_GPL(sst_dsp_register_poll);
void sst_dsp_dump(struct sst_dsp *sst)
{
if (sst->ops->dump)

2
sound/soc/intel/common/sst-dsp.h
View File

@ -278,6 +278,8 @@ void sst_dsp_inbox_read(struct sst_dsp *dsp, void *message, size_t bytes);
void sst_dsp_outbox_write(struct sst_dsp *dsp, void *message, size_t bytes);
void sst_dsp_outbox_read(struct sst_dsp *dsp, void *message, size_t bytes);
void sst_dsp_mailbox_dump(struct sst_dsp *dsp, size_t bytes);
int sst_dsp_register_poll(struct sst_dsp *dsp, u32 offset, u32 mask,
u32 expected_value, u32 timeout, char *operation);
/* Debug */
void sst_dsp_dump(struct sst_dsp *sst);