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Commit 7a2c52b6 authored by Subhransu S. Prusty's avatar Subhransu S. Prusty Committed by Mark Brown
Browse files

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



This patch adds helper to poll register for DSP status.

Signed-off-by: default avatarSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: default avatarKp, Jeeja <jeeja.kp@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 05057001

sound/soc/intel/common/sst-dsp.c

+43 −0
Original line number Diff line number Diff line
@@ -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)

sound/soc/intel/common/sst-dsp.h

+2 −0
Original line number Diff line number Diff line
@@ -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);