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From: Markus Pargmann <mpa@pengutronix.de>
Date: Wed, 11 Sep 2013 16:43:57 +0200
Subject: [PATCH] usb: musb: dsps, debugfs files
debugfs files to show the contents of important dsps registers.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
drivers/usb/musb/musb_dsps.c | 55 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 189e52c..0680f0e 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -46,6 +46,8 @@
#include <linux/of_irq.h>
#include <linux/usb/of.h>
+#include <linux/debugfs.h>
+
#include "musb_core.h"
static const struct of_device_id musb_dsps_of_match[];
@@ -119,6 +121,27 @@ struct dsps_glue {
const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
struct timer_list timer; /* otg_workaround timer */
unsigned long last_timer; /* last timer data for each instance */
+
+ struct debugfs_regset32 regset;
+ struct dentry *dbgfs_root;
+};
+
+static const struct debugfs_reg32 dsps_musb_regs[] = {
+ { "revision", 0x00 },
+ { "control", 0x14 },
+ { "status", 0x18 },
+ { "eoi", 0x24 },
+ { "intr0_stat", 0x30 },
+ { "intr1_stat", 0x34 },
+ { "intr0_set", 0x38 },
+ { "intr1_set", 0x3c },
+ { "txmode", 0x70 },
+ { "rxmode", 0x74 },
+ { "autoreq", 0xd0 },
+ { "srpfixtime", 0xd4 },
+ { "tdown", 0xd8 },
+ { "phy_utmi", 0xe0 },
+ { "mode", 0xe8 },
};
/**
@@ -348,6 +371,30 @@ out:
return ret;
}
+static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
+{
+ struct dentry *root;
+ struct dentry *file;
+ char buf[128];
+
+ sprintf(buf, "%s.dsps", dev_name(musb->controller));
+ root = debugfs_create_dir(buf, NULL);
+ if (!root)
+ return -ENOMEM;
+ glue->dbgfs_root = root;
+
+ glue->regset.regs = dsps_musb_regs;
+ glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
+ glue->regset.base = musb->ctrl_base;
+
+ file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
+ if (!file) {
+ debugfs_remove_recursive(root);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
static int dsps_musb_init(struct musb *musb)
{
struct device *dev = musb->controller;
@@ -357,6 +404,7 @@ static int dsps_musb_init(struct musb *musb)
void __iomem *reg_base;
struct resource *r;
u32 rev, val;
+ int ret;
r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
if (!r)
@@ -390,6 +438,10 @@ static int dsps_musb_init(struct musb *musb)
val &= ~(1 << wrp->otg_disable);
dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
+ ret = dsps_musb_dbg_init(musb, glue);
+ if (ret)
+ return ret;
+
return 0;
}
@@ -587,6 +639,9 @@ static int dsps_remove(struct platform_device *pdev)
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(glue);
+
+ debugfs_remove_recursive(glue->dbgfs_root);
+
return 0;
}
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