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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/soc/fsl/fsl_ssi_dbg.c
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// SPDX-License-Identifier: GPL-2.0

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//

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// Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions

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//

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// Copyright 2014 Markus Pargmann <[email protected]>, Pengutronix

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//

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// Split from fsl_ssi.c

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#include <linux/debugfs.h>

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#include <linux/device.h>

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#include <linux/kernel.h>

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#include "fsl_ssi.h"

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void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr)

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{

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	if (sisr & SSI_SISR_RFRC)

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		dbg->stats.rfrc++;

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	if (sisr & SSI_SISR_TFRC)

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		dbg->stats.tfrc++;

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	if (sisr & SSI_SISR_CMDAU)

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		dbg->stats.cmdau++;

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	if (sisr & SSI_SISR_CMDDU)

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		dbg->stats.cmddu++;

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	if (sisr & SSI_SISR_RXT)

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		dbg->stats.rxt++;

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	if (sisr & SSI_SISR_RDR1)

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		dbg->stats.rdr1++;

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	if (sisr & SSI_SISR_RDR0)

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		dbg->stats.rdr0++;

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	if (sisr & SSI_SISR_TDE1)

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		dbg->stats.tde1++;

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	if (sisr & SSI_SISR_TDE0)

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		dbg->stats.tde0++;

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	if (sisr & SSI_SISR_ROE1)

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		dbg->stats.roe1++;

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	if (sisr & SSI_SISR_ROE0)

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		dbg->stats.roe0++;

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	if (sisr & SSI_SISR_TUE1)

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		dbg->stats.tue1++;

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	if (sisr & SSI_SISR_TUE0)

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		dbg->stats.tue0++;

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	if (sisr & SSI_SISR_TFS)

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		dbg->stats.tfs++;

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	if (sisr & SSI_SISR_RFS)

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		dbg->stats.rfs++;

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	if (sisr & SSI_SISR_TLS)

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		dbg->stats.tls++;

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	if (sisr & SSI_SISR_RLS)

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		dbg->stats.rls++;

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	if (sisr & SSI_SISR_RFF1)

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		dbg->stats.rff1++;

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	if (sisr & SSI_SISR_RFF0)

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		dbg->stats.rff0++;

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	if (sisr & SSI_SISR_TFE1)

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		dbg->stats.tfe1++;

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	if (sisr & SSI_SISR_TFE0)

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		dbg->stats.tfe0++;

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}

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/*

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 * Show the statistics of a flag only if its interrupt is enabled

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 *

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 * Compilers will optimize it to a no-op if the interrupt is disabled

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 */

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#define SIER_SHOW(flag, name) \

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	do { \

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		if (SSI_SIER_##flag) \

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			seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \

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	} while (0)

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/*

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 * Display the statistics for the current SSI device

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 *

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 * To avoid confusion, only show those counts that are enabled

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 */

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static int fsl_ssi_stats_show(struct seq_file *s, void *unused)

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{

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	struct fsl_ssi_dbg *ssi_dbg = s->private;

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	SIER_SHOW(RFRC_EN, rfrc);

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	SIER_SHOW(TFRC_EN, tfrc);

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	SIER_SHOW(CMDAU_EN, cmdau);

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	SIER_SHOW(CMDDU_EN, cmddu);

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	SIER_SHOW(RXT_EN, rxt);

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	SIER_SHOW(RDR1_EN, rdr1);

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	SIER_SHOW(RDR0_EN, rdr0);

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	SIER_SHOW(TDE1_EN, tde1);

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	SIER_SHOW(TDE0_EN, tde0);

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	SIER_SHOW(ROE1_EN, roe1);

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	SIER_SHOW(ROE0_EN, roe0);

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	SIER_SHOW(TUE1_EN, tue1);

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	SIER_SHOW(TUE0_EN, tue0);

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	SIER_SHOW(TFS_EN, tfs);

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	SIER_SHOW(RFS_EN, rfs);

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	SIER_SHOW(TLS_EN, tls);

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	SIER_SHOW(RLS_EN, rls);

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	SIER_SHOW(RFF1_EN, rff1);

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	SIER_SHOW(RFF0_EN, rff0);

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	SIER_SHOW(TFE1_EN, tfe1);

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	SIER_SHOW(TFE0_EN, tfe0);

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	return 0;

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}

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DEFINE_SHOW_ATTRIBUTE(fsl_ssi_stats);

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void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)

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{

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	ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);

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	debugfs_create_file("stats", 0444, ssi_dbg->dbg_dir, ssi_dbg,

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			    &fsl_ssi_stats_fops);

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}

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void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)

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{

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	debugfs_remove_recursive(ssi_dbg->dbg_dir);

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}

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