Commit 40f099e3 authored by Markus Pargmann's avatar Markus Pargmann Committed by Felipe Balbi
Browse files

usb: musb: dsps, debugfs files 



debugfs files to show the contents of important dsps registers.

Signed-off-by: default avatarMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 06f9b6e5

drivers/usb/musb/musb_dsps.c

+54 −0
Original line number Diff line number Diff line
@@ -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 @@ static irqreturn_t dsps_interrupt(int irq, void *hci) 
	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;

}