LXR linux/sound/soc/fsl/fsl_ssi

   1// SPDX-License-Identifier: GPL-2.0
   2//
   3// Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions
   4//
   5// Copyright 2014 Markus Pargmann <mpa@pengutronix.de>, Pengutronix
   6//
   7// Split from fsl_ssi.c
   8
   9#include <linux/debugfs.h>
  10#include <linux/device.h>
  11#include <linux/kernel.h>
  12
  13#include "fsl_ssi.h"
  14
  15void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr)
  16{
  17        if (sisr & SSI_SISR_RFRC)
  18                dbg->stats.rfrc++;
  19
  20        if (sisr & SSI_SISR_TFRC)
  21                dbg->stats.tfrc++;
  22
  23        if (sisr & SSI_SISR_CMDAU)
  24                dbg->stats.cmdau++;
  25
  26        if (sisr & SSI_SISR_CMDDU)
  27                dbg->stats.cmddu++;
  28
  29        if (sisr & SSI_SISR_RXT)
  30                dbg->stats.rxt++;
  31
  32        if (sisr & SSI_SISR_RDR1)
  33                dbg->stats.rdr1++;
  34
  35        if (sisr & SSI_SISR_RDR0)
  36                dbg->stats.rdr0++;
  37
  38        if (sisr & SSI_SISR_TDE1)
  39                dbg->stats.tde1++;
  40
  41        if (sisr & SSI_SISR_TDE0)
  42                dbg->stats.tde0++;
  43
  44        if (sisr & SSI_SISR_ROE1)
  45                dbg->stats.roe1++;
  46
  47        if (sisr & SSI_SISR_ROE0)
  48                dbg->stats.roe0++;
  49
  50        if (sisr & SSI_SISR_TUE1)
  51                dbg->stats.tue1++;
  52
  53        if (sisr & SSI_SISR_TUE0)
  54                dbg->stats.tue0++;
  55
  56        if (sisr & SSI_SISR_TFS)
  57                dbg->stats.tfs++;
  58
  59        if (sisr & SSI_SISR_RFS)
  60                dbg->stats.rfs++;
  61
  62        if (sisr & SSI_SISR_TLS)
  63                dbg->stats.tls++;
  64
  65        if (sisr & SSI_SISR_RLS)
  66                dbg->stats.rls++;
  67
  68        if (sisr & SSI_SISR_RFF1)
  69                dbg->stats.rff1++;
  70
  71        if (sisr & SSI_SISR_RFF0)
  72                dbg->stats.rff0++;
  73
  74        if (sisr & SSI_SISR_TFE1)
  75                dbg->stats.tfe1++;
  76
  77        if (sisr & SSI_SISR_TFE0)
  78                dbg->stats.tfe0++;
  79}
  80
  81/*
  82 * Show the statistics of a flag only if its interrupt is enabled
  83 *
  84 * Compilers will optimize it to a no-op if the interrupt is disabled
  85 */
  86#define SIER_SHOW(flag, name) \
  87        do { \
  88                if (SSI_SIER_##flag) \
  89                        seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \
  90        } while (0)
  91
  92
  93/*
  94 * Display the statistics for the current SSI device
  95 *
  96 * To avoid confusion, only show those counts that are enabled
  97 */
  98static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
  99{
 100        struct fsl_ssi_dbg *ssi_dbg = s->private;
 101
 102        SIER_SHOW(RFRC_EN, rfrc);
 103        SIER_SHOW(TFRC_EN, tfrc);
 104        SIER_SHOW(CMDAU_EN, cmdau);
 105        SIER_SHOW(CMDDU_EN, cmddu);
 106        SIER_SHOW(RXT_EN, rxt);
 107        SIER_SHOW(RDR1_EN, rdr1);
 108        SIER_SHOW(RDR0_EN, rdr0);
 109        SIER_SHOW(TDE1_EN, tde1);
 110        SIER_SHOW(TDE0_EN, tde0);
 111        SIER_SHOW(ROE1_EN, roe1);
 112        SIER_SHOW(ROE0_EN, roe0);
 113        SIER_SHOW(TUE1_EN, tue1);
 114        SIER_SHOW(TUE0_EN, tue0);
 115        SIER_SHOW(TFS_EN, tfs);
 116        SIER_SHOW(RFS_EN, rfs);
 117        SIER_SHOW(TLS_EN, tls);
 118        SIER_SHOW(RLS_EN, rls);
 119        SIER_SHOW(RFF1_EN, rff1);
 120        SIER_SHOW(RFF0_EN, rff0);
 121        SIER_SHOW(TFE1_EN, tfe1);
 122        SIER_SHOW(TFE0_EN, tfe0);
 123
 124        return 0;
 125}
 126
 127DEFINE_SHOW_ATTRIBUTE(fsl_ssi_stats);
 128
 129void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
 130{
 131        ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
 132
 133        debugfs_create_file("stats", 0444, ssi_dbg->dbg_dir, ssi_dbg,
 134                            &fsl_ssi_stats_fops);
 135}
 136
 137void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
 138{
 139        debugfs_remove_recursive(ssi_dbg->dbg_dir);
 140}
 141