164 lines
3.6 KiB
C
164 lines
3.6 KiB
C
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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 <mpa@pengutronix.de>, Pengutronix
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*
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* Splitted from fsl_ssi.c
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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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 & CCSR_SSI_SISR_RFRC)
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dbg->stats.rfrc++;
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if (sisr & CCSR_SSI_SISR_TFRC)
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dbg->stats.tfrc++;
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if (sisr & CCSR_SSI_SISR_CMDAU)
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dbg->stats.cmdau++;
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if (sisr & CCSR_SSI_SISR_CMDDU)
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dbg->stats.cmddu++;
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if (sisr & CCSR_SSI_SISR_RXT)
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dbg->stats.rxt++;
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if (sisr & CCSR_SSI_SISR_RDR1)
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dbg->stats.rdr1++;
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if (sisr & CCSR_SSI_SISR_RDR0)
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dbg->stats.rdr0++;
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if (sisr & CCSR_SSI_SISR_TDE1)
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dbg->stats.tde1++;
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if (sisr & CCSR_SSI_SISR_TDE0)
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dbg->stats.tde0++;
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if (sisr & CCSR_SSI_SISR_ROE1)
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dbg->stats.roe1++;
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if (sisr & CCSR_SSI_SISR_ROE0)
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dbg->stats.roe0++;
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if (sisr & CCSR_SSI_SISR_TUE1)
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dbg->stats.tue1++;
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if (sisr & CCSR_SSI_SISR_TUE0)
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dbg->stats.tue0++;
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if (sisr & CCSR_SSI_SISR_TFS)
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dbg->stats.tfs++;
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if (sisr & CCSR_SSI_SISR_RFS)
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dbg->stats.rfs++;
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if (sisr & CCSR_SSI_SISR_TLS)
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dbg->stats.tls++;
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if (sisr & CCSR_SSI_SISR_RLS)
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dbg->stats.rls++;
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if (sisr & CCSR_SSI_SISR_RFF1)
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dbg->stats.rff1++;
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if (sisr & CCSR_SSI_SISR_RFF0)
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dbg->stats.rff0++;
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if (sisr & CCSR_SSI_SISR_TFE1)
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dbg->stats.tfe1++;
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if (sisr & CCSR_SSI_SISR_TFE0)
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dbg->stats.tfe0++;
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}
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/* Show the statistics of a flag only if its interrupt is enabled. The
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* compiler will optimze this code to a no-op if the interrupt is not
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* enabled.
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*/
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#define SIER_SHOW(flag, name) \
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do { \
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if (CCSR_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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* fsl_sysfs_ssi_show: display SSI statistics
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*
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* Display the statistics for the current SSI device. To avoid confusion,
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* we 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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static int fsl_ssi_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, fsl_ssi_stats_show, inode->i_private);
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}
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static const struct file_operations fsl_ssi_stats_ops = {
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.open = fsl_ssi_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int 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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if (!ssi_dbg->dbg_dir)
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return -ENOMEM;
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ssi_dbg->dbg_stats = debugfs_create_file("stats", S_IRUGO,
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ssi_dbg->dbg_dir, ssi_dbg, &fsl_ssi_stats_ops);
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if (!ssi_dbg->dbg_stats) {
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debugfs_remove(ssi_dbg->dbg_dir);
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return -ENOMEM;
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}
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return 0;
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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(ssi_dbg->dbg_stats);
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debugfs_remove(ssi_dbg->dbg_dir);
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}
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