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/*
* Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions
*
* Copyright 2014 Markus Pargmann <mpa@pengutronix.de>, Pengutronix
*
* Splitted from fsl_ssi.c
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include "fsl_ssi.h"
void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr)
{
if (sisr & SSI_SISR_RFRC)
dbg->stats.rfrc++;
if (sisr & SSI_SISR_TFRC)
dbg->stats.tfrc++;
if (sisr & SSI_SISR_CMDAU)
dbg->stats.cmdau++;
if (sisr & SSI_SISR_CMDDU)
dbg->stats.cmddu++;
if (sisr & SSI_SISR_RXT)
dbg->stats.rxt++;
if (sisr & SSI_SISR_RDR1)
dbg->stats.rdr1++;
if (sisr & SSI_SISR_RDR0)
dbg->stats.rdr0++;
if (sisr & SSI_SISR_TDE1)
dbg->stats.tde1++;
if (sisr & SSI_SISR_TDE0)
dbg->stats.tde0++;
if (sisr & SSI_SISR_ROE1)
dbg->stats.roe1++;
if (sisr & SSI_SISR_ROE0)
dbg->stats.roe0++;
if (sisr & SSI_SISR_TUE1)
dbg->stats.tue1++;
if (sisr & SSI_SISR_TUE0)
dbg->stats.tue0++;
if (sisr & SSI_SISR_TFS)
dbg->stats.tfs++;
if (sisr & SSI_SISR_RFS)
dbg->stats.rfs++;
if (sisr & SSI_SISR_TLS)
dbg->stats.tls++;
if (sisr & SSI_SISR_RLS)
dbg->stats.rls++;
if (sisr & SSI_SISR_RFF1)
dbg->stats.rff1++;
if (sisr & SSI_SISR_RFF0)
dbg->stats.rff0++;
if (sisr & SSI_SISR_TFE1)
dbg->stats.tfe1++;
if (sisr & SSI_SISR_TFE0)
dbg->stats.tfe0++;
}
/**
* Show the statistics of a flag only if its interrupt is enabled
*
* Compilers will optimize it to a no-op if the interrupt is disabled
*/
#define SIER_SHOW(flag, name) \
do { \
if (SSI_SIER_##flag) \
seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \
} while (0)
/**
* Display the statistics for the current SSI device
*
* To avoid confusion, only show those counts that are enabled
*/
static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
{
struct fsl_ssi_dbg *ssi_dbg = s->private;
SIER_SHOW(RFRC_EN, rfrc);
SIER_SHOW(TFRC_EN, tfrc);
SIER_SHOW(CMDAU_EN, cmdau);
SIER_SHOW(CMDDU_EN, cmddu);
SIER_SHOW(RXT_EN, rxt);
SIER_SHOW(RDR1_EN, rdr1);
SIER_SHOW(RDR0_EN, rdr0);
SIER_SHOW(TDE1_EN, tde1);
SIER_SHOW(TDE0_EN, tde0);
SIER_SHOW(ROE1_EN, roe1);
SIER_SHOW(ROE0_EN, roe0);
SIER_SHOW(TUE1_EN, tue1);
SIER_SHOW(TUE0_EN, tue0);
SIER_SHOW(TFS_EN, tfs);
SIER_SHOW(RFS_EN, rfs);
SIER_SHOW(TLS_EN, tls);
SIER_SHOW(RLS_EN, rls);
SIER_SHOW(RFF1_EN, rff1);
SIER_SHOW(RFF0_EN, rff0);
SIER_SHOW(TFE1_EN, tfe1);
SIER_SHOW(TFE0_EN, tfe0);
return 0;
}
static int fsl_ssi_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, fsl_ssi_stats_show, inode->i_private);
}
static const struct file_operations fsl_ssi_stats_ops = {
.open = fsl_ssi_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
{
ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
if (!ssi_dbg->dbg_dir)
return -ENOMEM;
ssi_dbg->dbg_stats = debugfs_create_file("stats", S_IRUGO,
ssi_dbg->dbg_dir, ssi_dbg,
&fsl_ssi_stats_ops);
if (!ssi_dbg->dbg_stats) {
debugfs_remove(ssi_dbg->dbg_dir);
return -ENOMEM;
}
return 0;
}
void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
{
debugfs_remove(ssi_dbg->dbg_stats);
debugfs_remove(ssi_dbg->dbg_dir);
}
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