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usb: musb: dsps, debugfs files

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debugfs files to show the contents of important dsps registers.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Markus Pargmann 2014-01-17 10:22:35 +01:00 committed by Felipe Balbi
parent 06f9b6e596
commit 40f099e32c
1 changed files with 54 additions and 0 deletions
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54
drivers/usb/musb/musb_dsps.c
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@ -45,6 +45,8 @@
#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[];
@ -136,6 +138,26 @@ struct dsps_glue {
unsigned long last_timer; /* last timer data for each instance */
struct dsps_context context;
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 },
};
static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
@ -368,6 +390,30 @@ 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;
@ -377,6 +423,7 @@ 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)
@ -410,6 +457,10 @@ 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;
}
@ -656,6 +707,9 @@ static int dsps_remove(struct platform_device *pdev)
/* disable usbss clocks */
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
debugfs_remove_recursive(glue->dbgfs_root);
return 0;
}