[PATCH V3 8/30] omap_hsmmc: add debugfs entry (host registers)

Adrian Hunter
2009-09-09T11:57:22Z

>From 9ef69fd17bbd1d598a7f262d5940f88dbfff526c Mon Sep 17 00:00:00 2001
From: Denis Karpov <ext-denis.2.karpov@nokia.com>
Date: Wed, 22 Apr 2009 14:21:34 +0200
Subject: [PATCH] omap_hsmmc: add debugfs entry (host registers)

Adds <debugfs_root>/kernel/debug/mmc<N>/regs entry,
contents show registers' state and some driver internal
state variables.

Signed-off-by: Denis Karpov <ext-denis.2.karpov@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
---
drivers/mmc/host/omap_hsmmc.c | 57 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 57 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 1cf9cfb..cbd8376 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -17,6 +17,8 @@

#include <linux/module.h>
#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
@@ -967,6 +969,59 @@ static struct mmc_host_ops mmc_omap_ops = {
/* NYET -- enable_sdio_irq */
};

+#ifdef CONFIG_DEBUG_FS
+
+static int mmc_regs_show(struct seq_file *s, void *data)
+{
+ struct mmc_host *mmc = s->private;
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ seq_printf(s, "mmc%d regs:\n", mmc->index);
+
+ seq_printf(s, "SYSCONFIG:\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, SYSCONFIG));
+ seq_printf(s, "CON:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, CON));
+ seq_printf(s, "HCTL:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, HCTL));
+ seq_printf(s, "SYSCTL:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, SYSCTL));
+ seq_printf(s, "IE:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, IE));
+ seq_printf(s, "ISE:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, ISE));
+ seq_printf(s, "CAPA:\t\t0x%08x\n",
+ OMAP_HSMMC_READ(host->base, CAPA));
+ return 0;
+}
+
+static int mmc_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mmc_regs_show, inode->i_private);
+}
+
+static const struct file_operations mmc_regs_fops = {
+ .open = mmc_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void omap_mmc_debugfs(struct mmc_host *mmc)
+{
+ if (mmc->debugfs_root)
+ debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root,
+ mmc, &mmc_regs_fops);
+}
+
+#else
+
+static void omap_mmc_debugfs(struct mmc_host *mmc)
+{
+}
+
+#endif
+
static int __init omap_mmc_probe(struct platform_device *pdev)
{
struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
@@ -1150,6 +1205,8 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
goto err_cover_switch;
}

+ omap_mmc_debugfs(mmc);
+
return 0;

err_cover_switch:
--
1.5.6.3