diff options
Diffstat (limited to 'sound/soc/fsl/fsl_ssi_dbg.c')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi_dbg.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_ssi_dbg.c b/sound/soc/fsl/fsl_ssi_dbg.c new file mode 100644 index 000000000..1255dfe19 --- /dev/null +++ b/sound/soc/fsl/fsl_ssi_dbg.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions +// +// Copyright 2014 Markus Pargmann <mpa@pengutronix.de>, Pengutronix +// +// Split from fsl_ssi.c + +#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", 0444, + 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); +} |