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7a8fceb74d
This patch refines the comments by: 1) Removing all out-of-date comments 2) Removing all not-so-useful comments 3) Unifying the styles of all comments 4) Shortening comments to be more conise 5) Adding comments to improve code readablity 6) Moving all register related comments to fsl_ssi.h 7) Adding comments to all register and field defines Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Tested-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Reviewed-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Acked-by: Timur Tabi <timur@tabi.org> Signed-off-by: Mark Brown <broonie@kernel.org>
163 lines
3.5 KiB
C
163 lines
3.5 KiB
C
/*
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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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/**
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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 (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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* 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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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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