drivers/usb/dwc3/debugfs.c - maze/linux - Git at Google

 /**
  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
  *
  * Authors: Felipe Balbi <balbi@ti.com>,
  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The names of the above-listed copyright holders may not be used
  *    to endorse or promote products derived from this software without
  *    specific prior written permission.
  *
  * ALTERNATIVELY, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2, as published by the Free
  * Software Foundation.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/ptrace.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/delay.h>
 #include <linux/uaccess.h>

 #include "core.h"
 #include "gadget.h"
 #include "io.h"
 #include "debug.h"

 #define dump_register(nm)				\
 {							\
 	.name	= __stringify(nm),			\
 	.offset	= DWC3_ ##nm,				\
 }

 static const struct debugfs_reg32 dwc3_regs[] = {
 	dump_register(GSBUSCFG0),
 	dump_register(GSBUSCFG1),
 	dump_register(GTXTHRCFG),
 	dump_register(GRXTHRCFG),
 	dump_register(GCTL),
 	dump_register(GEVTEN),
 	dump_register(GSTS),
 	dump_register(GSNPSID),
 	dump_register(GGPIO),
 	dump_register(GUID),
 	dump_register(GUCTL),
 	dump_register(GBUSERRADDR0),
 	dump_register(GBUSERRADDR1),
 	dump_register(GPRTBIMAP0),
 	dump_register(GPRTBIMAP1),
 	dump_register(GHWPARAMS0),
 	dump_register(GHWPARAMS1),
 	dump_register(GHWPARAMS2),
 	dump_register(GHWPARAMS3),
 	dump_register(GHWPARAMS4),
 	dump_register(GHWPARAMS5),
 	dump_register(GHWPARAMS6),
 	dump_register(GHWPARAMS7),
 	dump_register(GDBGFIFOSPACE),
 	dump_register(GDBGLTSSM),
 	dump_register(GPRTBIMAP_HS0),
 	dump_register(GPRTBIMAP_HS1),
 	dump_register(GPRTBIMAP_FS0),
 	dump_register(GPRTBIMAP_FS1),

 	dump_register(GUSB2PHYCFG(0)),
 	dump_register(GUSB2PHYCFG(1)),
 	dump_register(GUSB2PHYCFG(2)),
 	dump_register(GUSB2PHYCFG(3)),
 	dump_register(GUSB2PHYCFG(4)),
 	dump_register(GUSB2PHYCFG(5)),
 	dump_register(GUSB2PHYCFG(6)),
 	dump_register(GUSB2PHYCFG(7)),
 	dump_register(GUSB2PHYCFG(8)),
 	dump_register(GUSB2PHYCFG(9)),
 	dump_register(GUSB2PHYCFG(10)),
 	dump_register(GUSB2PHYCFG(11)),
 	dump_register(GUSB2PHYCFG(12)),
 	dump_register(GUSB2PHYCFG(13)),
 	dump_register(GUSB2PHYCFG(14)),
 	dump_register(GUSB2PHYCFG(15)),

 	dump_register(GUSB2I2CCTL(0)),
 	dump_register(GUSB2I2CCTL(1)),
 	dump_register(GUSB2I2CCTL(2)),
 	dump_register(GUSB2I2CCTL(3)),
 	dump_register(GUSB2I2CCTL(4)),
 	dump_register(GUSB2I2CCTL(5)),
 	dump_register(GUSB2I2CCTL(6)),
 	dump_register(GUSB2I2CCTL(7)),
 	dump_register(GUSB2I2CCTL(8)),
 	dump_register(GUSB2I2CCTL(9)),
 	dump_register(GUSB2I2CCTL(10)),
 	dump_register(GUSB2I2CCTL(11)),
 	dump_register(GUSB2I2CCTL(12)),
 	dump_register(GUSB2I2CCTL(13)),
 	dump_register(GUSB2I2CCTL(14)),
 	dump_register(GUSB2I2CCTL(15)),

 	dump_register(GUSB2PHYACC(0)),
 	dump_register(GUSB2PHYACC(1)),
 	dump_register(GUSB2PHYACC(2)),
 	dump_register(GUSB2PHYACC(3)),
 	dump_register(GUSB2PHYACC(4)),
 	dump_register(GUSB2PHYACC(5)),
 	dump_register(GUSB2PHYACC(6)),
 	dump_register(GUSB2PHYACC(7)),
 	dump_register(GUSB2PHYACC(8)),
 	dump_register(GUSB2PHYACC(9)),
 	dump_register(GUSB2PHYACC(10)),
 	dump_register(GUSB2PHYACC(11)),
 	dump_register(GUSB2PHYACC(12)),
 	dump_register(GUSB2PHYACC(13)),
 	dump_register(GUSB2PHYACC(14)),
 	dump_register(GUSB2PHYACC(15)),

 	dump_register(GUSB3PIPECTL(0)),
 	dump_register(GUSB3PIPECTL(1)),
 	dump_register(GUSB3PIPECTL(2)),
 	dump_register(GUSB3PIPECTL(3)),
 	dump_register(GUSB3PIPECTL(4)),
 	dump_register(GUSB3PIPECTL(5)),
 	dump_register(GUSB3PIPECTL(6)),
 	dump_register(GUSB3PIPECTL(7)),
 	dump_register(GUSB3PIPECTL(8)),
 	dump_register(GUSB3PIPECTL(9)),
 	dump_register(GUSB3PIPECTL(10)),
 	dump_register(GUSB3PIPECTL(11)),
 	dump_register(GUSB3PIPECTL(12)),
 	dump_register(GUSB3PIPECTL(13)),
 	dump_register(GUSB3PIPECTL(14)),
 	dump_register(GUSB3PIPECTL(15)),

 	dump_register(GTXFIFOSIZ(0)),
 	dump_register(GTXFIFOSIZ(1)),
 	dump_register(GTXFIFOSIZ(2)),
 	dump_register(GTXFIFOSIZ(3)),
 	dump_register(GTXFIFOSIZ(4)),
 	dump_register(GTXFIFOSIZ(5)),
 	dump_register(GTXFIFOSIZ(6)),
 	dump_register(GTXFIFOSIZ(7)),
 	dump_register(GTXFIFOSIZ(8)),
 	dump_register(GTXFIFOSIZ(9)),
 	dump_register(GTXFIFOSIZ(10)),
 	dump_register(GTXFIFOSIZ(11)),
 	dump_register(GTXFIFOSIZ(12)),
 	dump_register(GTXFIFOSIZ(13)),
 	dump_register(GTXFIFOSIZ(14)),
 	dump_register(GTXFIFOSIZ(15)),
 	dump_register(GTXFIFOSIZ(16)),
 	dump_register(GTXFIFOSIZ(17)),
 	dump_register(GTXFIFOSIZ(18)),
 	dump_register(GTXFIFOSIZ(19)),
 	dump_register(GTXFIFOSIZ(20)),
 	dump_register(GTXFIFOSIZ(21)),
 	dump_register(GTXFIFOSIZ(22)),
 	dump_register(GTXFIFOSIZ(23)),
 	dump_register(GTXFIFOSIZ(24)),
 	dump_register(GTXFIFOSIZ(25)),
 	dump_register(GTXFIFOSIZ(26)),
 	dump_register(GTXFIFOSIZ(27)),
 	dump_register(GTXFIFOSIZ(28)),
 	dump_register(GTXFIFOSIZ(29)),
 	dump_register(GTXFIFOSIZ(30)),
 	dump_register(GTXFIFOSIZ(31)),

 	dump_register(GRXFIFOSIZ(0)),
 	dump_register(GRXFIFOSIZ(1)),
 	dump_register(GRXFIFOSIZ(2)),
 	dump_register(GRXFIFOSIZ(3)),
 	dump_register(GRXFIFOSIZ(4)),
 	dump_register(GRXFIFOSIZ(5)),
 	dump_register(GRXFIFOSIZ(6)),
 	dump_register(GRXFIFOSIZ(7)),
 	dump_register(GRXFIFOSIZ(8)),
 	dump_register(GRXFIFOSIZ(9)),
 	dump_register(GRXFIFOSIZ(10)),
 	dump_register(GRXFIFOSIZ(11)),
 	dump_register(GRXFIFOSIZ(12)),
 	dump_register(GRXFIFOSIZ(13)),
 	dump_register(GRXFIFOSIZ(14)),
 	dump_register(GRXFIFOSIZ(15)),
 	dump_register(GRXFIFOSIZ(16)),
 	dump_register(GRXFIFOSIZ(17)),
 	dump_register(GRXFIFOSIZ(18)),
 	dump_register(GRXFIFOSIZ(19)),
 	dump_register(GRXFIFOSIZ(20)),
 	dump_register(GRXFIFOSIZ(21)),
 	dump_register(GRXFIFOSIZ(22)),
 	dump_register(GRXFIFOSIZ(23)),
 	dump_register(GRXFIFOSIZ(24)),
 	dump_register(GRXFIFOSIZ(25)),
 	dump_register(GRXFIFOSIZ(26)),
 	dump_register(GRXFIFOSIZ(27)),
 	dump_register(GRXFIFOSIZ(28)),
 	dump_register(GRXFIFOSIZ(29)),
 	dump_register(GRXFIFOSIZ(30)),
 	dump_register(GRXFIFOSIZ(31)),

 	dump_register(GEVNTADRLO(0)),
 	dump_register(GEVNTADRHI(0)),
 	dump_register(GEVNTSIZ(0)),
 	dump_register(GEVNTCOUNT(0)),

 	dump_register(GHWPARAMS8),
 	dump_register(DCFG),
 	dump_register(DCTL),
 	dump_register(DEVTEN),
 	dump_register(DSTS),
 	dump_register(DGCMDPAR),
 	dump_register(DGCMD),
 	dump_register(DALEPENA),

 	dump_register(DEPCMDPAR2(0)),
 	dump_register(DEPCMDPAR2(1)),
 	dump_register(DEPCMDPAR2(2)),
 	dump_register(DEPCMDPAR2(3)),
 	dump_register(DEPCMDPAR2(4)),
 	dump_register(DEPCMDPAR2(5)),
 	dump_register(DEPCMDPAR2(6)),
 	dump_register(DEPCMDPAR2(7)),
 	dump_register(DEPCMDPAR2(8)),
 	dump_register(DEPCMDPAR2(9)),
 	dump_register(DEPCMDPAR2(10)),
 	dump_register(DEPCMDPAR2(11)),
 	dump_register(DEPCMDPAR2(12)),
 	dump_register(DEPCMDPAR2(13)),
 	dump_register(DEPCMDPAR2(14)),
 	dump_register(DEPCMDPAR2(15)),
 	dump_register(DEPCMDPAR2(16)),
 	dump_register(DEPCMDPAR2(17)),
 	dump_register(DEPCMDPAR2(18)),
 	dump_register(DEPCMDPAR2(19)),
 	dump_register(DEPCMDPAR2(20)),
 	dump_register(DEPCMDPAR2(21)),
 	dump_register(DEPCMDPAR2(22)),
 	dump_register(DEPCMDPAR2(23)),
 	dump_register(DEPCMDPAR2(24)),
 	dump_register(DEPCMDPAR2(25)),
 	dump_register(DEPCMDPAR2(26)),
 	dump_register(DEPCMDPAR2(27)),
 	dump_register(DEPCMDPAR2(28)),
 	dump_register(DEPCMDPAR2(29)),
 	dump_register(DEPCMDPAR2(30)),
 	dump_register(DEPCMDPAR2(31)),

 	dump_register(DEPCMDPAR1(0)),
 	dump_register(DEPCMDPAR1(1)),
 	dump_register(DEPCMDPAR1(2)),
 	dump_register(DEPCMDPAR1(3)),
 	dump_register(DEPCMDPAR1(4)),
 	dump_register(DEPCMDPAR1(5)),
 	dump_register(DEPCMDPAR1(6)),
 	dump_register(DEPCMDPAR1(7)),
 	dump_register(DEPCMDPAR1(8)),
 	dump_register(DEPCMDPAR1(9)),
 	dump_register(DEPCMDPAR1(10)),
 	dump_register(DEPCMDPAR1(11)),
 	dump_register(DEPCMDPAR1(12)),
 	dump_register(DEPCMDPAR1(13)),
 	dump_register(DEPCMDPAR1(14)),
 	dump_register(DEPCMDPAR1(15)),
 	dump_register(DEPCMDPAR1(16)),
 	dump_register(DEPCMDPAR1(17)),
 	dump_register(DEPCMDPAR1(18)),
 	dump_register(DEPCMDPAR1(19)),
 	dump_register(DEPCMDPAR1(20)),
 	dump_register(DEPCMDPAR1(21)),
 	dump_register(DEPCMDPAR1(22)),
 	dump_register(DEPCMDPAR1(23)),
 	dump_register(DEPCMDPAR1(24)),
 	dump_register(DEPCMDPAR1(25)),
 	dump_register(DEPCMDPAR1(26)),
 	dump_register(DEPCMDPAR1(27)),
 	dump_register(DEPCMDPAR1(28)),
 	dump_register(DEPCMDPAR1(29)),
 	dump_register(DEPCMDPAR1(30)),
 	dump_register(DEPCMDPAR1(31)),

 	dump_register(DEPCMDPAR0(0)),
 	dump_register(DEPCMDPAR0(1)),
 	dump_register(DEPCMDPAR0(2)),
 	dump_register(DEPCMDPAR0(3)),
 	dump_register(DEPCMDPAR0(4)),
 	dump_register(DEPCMDPAR0(5)),
 	dump_register(DEPCMDPAR0(6)),
 	dump_register(DEPCMDPAR0(7)),
 	dump_register(DEPCMDPAR0(8)),
 	dump_register(DEPCMDPAR0(9)),
 	dump_register(DEPCMDPAR0(10)),
 	dump_register(DEPCMDPAR0(11)),
 	dump_register(DEPCMDPAR0(12)),
 	dump_register(DEPCMDPAR0(13)),
 	dump_register(DEPCMDPAR0(14)),
 	dump_register(DEPCMDPAR0(15)),
 	dump_register(DEPCMDPAR0(16)),
 	dump_register(DEPCMDPAR0(17)),
 	dump_register(DEPCMDPAR0(18)),
 	dump_register(DEPCMDPAR0(19)),
 	dump_register(DEPCMDPAR0(20)),
 	dump_register(DEPCMDPAR0(21)),
 	dump_register(DEPCMDPAR0(22)),
 	dump_register(DEPCMDPAR0(23)),
 	dump_register(DEPCMDPAR0(24)),
 	dump_register(DEPCMDPAR0(25)),
 	dump_register(DEPCMDPAR0(26)),
 	dump_register(DEPCMDPAR0(27)),
 	dump_register(DEPCMDPAR0(28)),
 	dump_register(DEPCMDPAR0(29)),
 	dump_register(DEPCMDPAR0(30)),
 	dump_register(DEPCMDPAR0(31)),

 	dump_register(DEPCMD(0)),
 	dump_register(DEPCMD(1)),
 	dump_register(DEPCMD(2)),
 	dump_register(DEPCMD(3)),
 	dump_register(DEPCMD(4)),
 	dump_register(DEPCMD(5)),
 	dump_register(DEPCMD(6)),
 	dump_register(DEPCMD(7)),
 	dump_register(DEPCMD(8)),
 	dump_register(DEPCMD(9)),
 	dump_register(DEPCMD(10)),
 	dump_register(DEPCMD(11)),
 	dump_register(DEPCMD(12)),
 	dump_register(DEPCMD(13)),
 	dump_register(DEPCMD(14)),
 	dump_register(DEPCMD(15)),
 	dump_register(DEPCMD(16)),
 	dump_register(DEPCMD(17)),
 	dump_register(DEPCMD(18)),
 	dump_register(DEPCMD(19)),
 	dump_register(DEPCMD(20)),
 	dump_register(DEPCMD(21)),
 	dump_register(DEPCMD(22)),
 	dump_register(DEPCMD(23)),
 	dump_register(DEPCMD(24)),
 	dump_register(DEPCMD(25)),
 	dump_register(DEPCMD(26)),
 	dump_register(DEPCMD(27)),
 	dump_register(DEPCMD(28)),
 	dump_register(DEPCMD(29)),
 	dump_register(DEPCMD(30)),
 	dump_register(DEPCMD(31)),

 	dump_register(OCFG),
 	dump_register(OCTL),
 	dump_register(OEVTEN),
 	dump_register(OSTS),
 };

 static int dwc3_regdump_show(struct seq_file *s, void *unused)
 {
 	struct dwc3		*dwc = s->private;

 	seq_printf(s, "DesignWare USB3 Core Register Dump\n");
 	debugfs_print_regs32(s, dwc3_regs, ARRAY_SIZE(dwc3_regs),
 			     dwc->regs, "");
 	return 0;
 }

 static int dwc3_regdump_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, dwc3_regdump_show, inode->i_private);
 }

 static const struct file_operations dwc3_regdump_fops = {
 	.open			= dwc3_regdump_open,
 	.read			= seq_read,
 	.release		= single_release,
 };

 static int dwc3_mode_show(struct seq_file *s, void *unused)
 {
 	struct dwc3		*dwc = s->private;
 	unsigned long		flags;
 	u32			reg;

 	spin_lock_irqsave(&dwc->lock, flags);
 	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 	spin_unlock_irqrestore(&dwc->lock, flags);

 	switch (DWC3_GCTL_PRTCAP(reg)) {
 	case DWC3_GCTL_PRTCAP_HOST:
 		seq_printf(s, "host\n");
 		break;
 	case DWC3_GCTL_PRTCAP_DEVICE:
 		seq_printf(s, "device\n");
 		break;
 	case DWC3_GCTL_PRTCAP_OTG:
 		seq_printf(s, "OTG\n");
 		break;
 	default:
 		seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 	}

 	return 0;
 }

 static int dwc3_mode_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, dwc3_mode_show, inode->i_private);
 }

 static ssize_t dwc3_mode_write(struct file *file,
 		const char __user *ubuf, size_t count, loff_t *ppos)
 {
 	struct seq_file		*s = file->private_data;
 	struct dwc3		*dwc = s->private;
 	unsigned long		flags;
 	u32			mode = 0;
 	char			buf[32];

 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 		return -EFAULT;

 	if (!strncmp(buf, "host", 4))
 		mode |= DWC3_GCTL_PRTCAP_HOST;

 	if (!strncmp(buf, "device", 6))
 		mode |= DWC3_GCTL_PRTCAP_DEVICE;

 	if (!strncmp(buf, "otg", 3))
 		mode |= DWC3_GCTL_PRTCAP_OTG;

 	if (mode) {
 		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_set_mode(dwc, mode);
 		spin_unlock_irqrestore(&dwc->lock, flags);
 	}
 	return count;
 }

 static const struct file_operations dwc3_mode_fops = {
 	.open			= dwc3_mode_open,
 	.write			= dwc3_mode_write,
 	.read			= seq_read,
 	.llseek			= seq_lseek,
 	.release		= single_release,
 };

 int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 {
 	struct dentry		*root;
 	struct dentry		*file;
 	int			ret;

 	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 	if (IS_ERR(root)) {
 		ret = PTR_ERR(root);
 		goto err0;
 	}

 	dwc->root = root;

 	file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
 			&dwc3_regdump_fops);
 	if (IS_ERR(file)) {
 		ret = PTR_ERR(file);
 		goto err1;
 	}

 	file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 			dwc, &dwc3_mode_fops);
 	if (IS_ERR(file)) {
 		ret = PTR_ERR(file);
 		goto err1;
 	}

 	return 0;

 err1:
 	debugfs_remove_recursive(root);

 err0:
 	return ret;
 }

 void __devexit dwc3_debugfs_exit(struct dwc3 *dwc)
 {
 	debugfs_remove_recursive(dwc->root);
 	dwc->root = NULL;
 }
	/**
	* debugfs.c - DesignWare USB3 DRD Controller DebugFS file
	*
	* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
	*
	* Authors: Felipe Balbi <balbi@ti.com>,
	* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions, and the following disclaimer,
	* without modification.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The names of the above-listed copyright holders may not be used
	* to endorse or promote products derived from this software without
	* specific prior written permission.
	*
	* ALTERNATIVELY, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2, as published by the Free
	* Software Foundation.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/ptrace.h>
	#include <linux/types.h>
	#include <linux/spinlock.h>
	#include <linux/debugfs.h>
	#include <linux/seq_file.h>
	#include <linux/delay.h>
	#include <linux/uaccess.h>

	#include "core.h"
	#include "gadget.h"
	#include "io.h"
	#include "debug.h"

	#define dump_register(nm) \
	{ \
	.name = __stringify(nm), \
	.offset = DWC3_ ##nm, \
	}

	static const struct debugfs_reg32 dwc3_regs[] = {
	dump_register(GSBUSCFG0),
	dump_register(GSBUSCFG1),
	dump_register(GTXTHRCFG),
	dump_register(GRXTHRCFG),
	dump_register(GCTL),
	dump_register(GEVTEN),
	dump_register(GSTS),
	dump_register(GSNPSID),
	dump_register(GGPIO),
	dump_register(GUID),
	dump_register(GUCTL),
	dump_register(GBUSERRADDR0),
	dump_register(GBUSERRADDR1),
	dump_register(GPRTBIMAP0),
	dump_register(GPRTBIMAP1),
	dump_register(GHWPARAMS0),
	dump_register(GHWPARAMS1),
	dump_register(GHWPARAMS2),
	dump_register(GHWPARAMS3),
	dump_register(GHWPARAMS4),
	dump_register(GHWPARAMS5),
	dump_register(GHWPARAMS6),
	dump_register(GHWPARAMS7),
	dump_register(GDBGFIFOSPACE),
	dump_register(GDBGLTSSM),
	dump_register(GPRTBIMAP_HS0),
	dump_register(GPRTBIMAP_HS1),
	dump_register(GPRTBIMAP_FS0),
	dump_register(GPRTBIMAP_FS1),

	dump_register(GUSB2PHYCFG(0)),
	dump_register(GUSB2PHYCFG(1)),
	dump_register(GUSB2PHYCFG(2)),
	dump_register(GUSB2PHYCFG(3)),
	dump_register(GUSB2PHYCFG(4)),
	dump_register(GUSB2PHYCFG(5)),
	dump_register(GUSB2PHYCFG(6)),
	dump_register(GUSB2PHYCFG(7)),
	dump_register(GUSB2PHYCFG(8)),
	dump_register(GUSB2PHYCFG(9)),
	dump_register(GUSB2PHYCFG(10)),
	dump_register(GUSB2PHYCFG(11)),
	dump_register(GUSB2PHYCFG(12)),
	dump_register(GUSB2PHYCFG(13)),
	dump_register(GUSB2PHYCFG(14)),
	dump_register(GUSB2PHYCFG(15)),

	dump_register(GUSB2I2CCTL(0)),
	dump_register(GUSB2I2CCTL(1)),
	dump_register(GUSB2I2CCTL(2)),
	dump_register(GUSB2I2CCTL(3)),
	dump_register(GUSB2I2CCTL(4)),
	dump_register(GUSB2I2CCTL(5)),
	dump_register(GUSB2I2CCTL(6)),
	dump_register(GUSB2I2CCTL(7)),
	dump_register(GUSB2I2CCTL(8)),
	dump_register(GUSB2I2CCTL(9)),
	dump_register(GUSB2I2CCTL(10)),
	dump_register(GUSB2I2CCTL(11)),
	dump_register(GUSB2I2CCTL(12)),
	dump_register(GUSB2I2CCTL(13)),
	dump_register(GUSB2I2CCTL(14)),
	dump_register(GUSB2I2CCTL(15)),

	dump_register(GUSB2PHYACC(0)),
	dump_register(GUSB2PHYACC(1)),
	dump_register(GUSB2PHYACC(2)),
	dump_register(GUSB2PHYACC(3)),
	dump_register(GUSB2PHYACC(4)),
	dump_register(GUSB2PHYACC(5)),
	dump_register(GUSB2PHYACC(6)),
	dump_register(GUSB2PHYACC(7)),
	dump_register(GUSB2PHYACC(8)),
	dump_register(GUSB2PHYACC(9)),
	dump_register(GUSB2PHYACC(10)),
	dump_register(GUSB2PHYACC(11)),
	dump_register(GUSB2PHYACC(12)),
	dump_register(GUSB2PHYACC(13)),
	dump_register(GUSB2PHYACC(14)),
	dump_register(GUSB2PHYACC(15)),

	dump_register(GUSB3PIPECTL(0)),
	dump_register(GUSB3PIPECTL(1)),
	dump_register(GUSB3PIPECTL(2)),
	dump_register(GUSB3PIPECTL(3)),
	dump_register(GUSB3PIPECTL(4)),
	dump_register(GUSB3PIPECTL(5)),
	dump_register(GUSB3PIPECTL(6)),
	dump_register(GUSB3PIPECTL(7)),
	dump_register(GUSB3PIPECTL(8)),
	dump_register(GUSB3PIPECTL(9)),
	dump_register(GUSB3PIPECTL(10)),
	dump_register(GUSB3PIPECTL(11)),
	dump_register(GUSB3PIPECTL(12)),
	dump_register(GUSB3PIPECTL(13)),
	dump_register(GUSB3PIPECTL(14)),
	dump_register(GUSB3PIPECTL(15)),

	dump_register(GTXFIFOSIZ(0)),
	dump_register(GTXFIFOSIZ(1)),
	dump_register(GTXFIFOSIZ(2)),
	dump_register(GTXFIFOSIZ(3)),
	dump_register(GTXFIFOSIZ(4)),
	dump_register(GTXFIFOSIZ(5)),
	dump_register(GTXFIFOSIZ(6)),
	dump_register(GTXFIFOSIZ(7)),
	dump_register(GTXFIFOSIZ(8)),
	dump_register(GTXFIFOSIZ(9)),
	dump_register(GTXFIFOSIZ(10)),
	dump_register(GTXFIFOSIZ(11)),
	dump_register(GTXFIFOSIZ(12)),
	dump_register(GTXFIFOSIZ(13)),
	dump_register(GTXFIFOSIZ(14)),
	dump_register(GTXFIFOSIZ(15)),
	dump_register(GTXFIFOSIZ(16)),
	dump_register(GTXFIFOSIZ(17)),
	dump_register(GTXFIFOSIZ(18)),
	dump_register(GTXFIFOSIZ(19)),
	dump_register(GTXFIFOSIZ(20)),
	dump_register(GTXFIFOSIZ(21)),
	dump_register(GTXFIFOSIZ(22)),
	dump_register(GTXFIFOSIZ(23)),
	dump_register(GTXFIFOSIZ(24)),
	dump_register(GTXFIFOSIZ(25)),
	dump_register(GTXFIFOSIZ(26)),
	dump_register(GTXFIFOSIZ(27)),
	dump_register(GTXFIFOSIZ(28)),
	dump_register(GTXFIFOSIZ(29)),
	dump_register(GTXFIFOSIZ(30)),
	dump_register(GTXFIFOSIZ(31)),

	dump_register(GRXFIFOSIZ(0)),
	dump_register(GRXFIFOSIZ(1)),
	dump_register(GRXFIFOSIZ(2)),
	dump_register(GRXFIFOSIZ(3)),
	dump_register(GRXFIFOSIZ(4)),
	dump_register(GRXFIFOSIZ(5)),
	dump_register(GRXFIFOSIZ(6)),
	dump_register(GRXFIFOSIZ(7)),
	dump_register(GRXFIFOSIZ(8)),
	dump_register(GRXFIFOSIZ(9)),
	dump_register(GRXFIFOSIZ(10)),
	dump_register(GRXFIFOSIZ(11)),
	dump_register(GRXFIFOSIZ(12)),
	dump_register(GRXFIFOSIZ(13)),
	dump_register(GRXFIFOSIZ(14)),
	dump_register(GRXFIFOSIZ(15)),
	dump_register(GRXFIFOSIZ(16)),
	dump_register(GRXFIFOSIZ(17)),
	dump_register(GRXFIFOSIZ(18)),
	dump_register(GRXFIFOSIZ(19)),
	dump_register(GRXFIFOSIZ(20)),
	dump_register(GRXFIFOSIZ(21)),
	dump_register(GRXFIFOSIZ(22)),
	dump_register(GRXFIFOSIZ(23)),
	dump_register(GRXFIFOSIZ(24)),
	dump_register(GRXFIFOSIZ(25)),
	dump_register(GRXFIFOSIZ(26)),
	dump_register(GRXFIFOSIZ(27)),
	dump_register(GRXFIFOSIZ(28)),
	dump_register(GRXFIFOSIZ(29)),
	dump_register(GRXFIFOSIZ(30)),
	dump_register(GRXFIFOSIZ(31)),

	dump_register(GEVNTADRLO(0)),
	dump_register(GEVNTADRHI(0)),
	dump_register(GEVNTSIZ(0)),
	dump_register(GEVNTCOUNT(0)),

	dump_register(GHWPARAMS8),
	dump_register(DCFG),
	dump_register(DCTL),
	dump_register(DEVTEN),
	dump_register(DSTS),
	dump_register(DGCMDPAR),
	dump_register(DGCMD),
	dump_register(DALEPENA),

	dump_register(DEPCMDPAR2(0)),
	dump_register(DEPCMDPAR2(1)),
	dump_register(DEPCMDPAR2(2)),
	dump_register(DEPCMDPAR2(3)),
	dump_register(DEPCMDPAR2(4)),
	dump_register(DEPCMDPAR2(5)),
	dump_register(DEPCMDPAR2(6)),
	dump_register(DEPCMDPAR2(7)),
	dump_register(DEPCMDPAR2(8)),
	dump_register(DEPCMDPAR2(9)),
	dump_register(DEPCMDPAR2(10)),
	dump_register(DEPCMDPAR2(11)),
	dump_register(DEPCMDPAR2(12)),
	dump_register(DEPCMDPAR2(13)),
	dump_register(DEPCMDPAR2(14)),
	dump_register(DEPCMDPAR2(15)),
	dump_register(DEPCMDPAR2(16)),
	dump_register(DEPCMDPAR2(17)),
	dump_register(DEPCMDPAR2(18)),
	dump_register(DEPCMDPAR2(19)),
	dump_register(DEPCMDPAR2(20)),
	dump_register(DEPCMDPAR2(21)),
	dump_register(DEPCMDPAR2(22)),
	dump_register(DEPCMDPAR2(23)),
	dump_register(DEPCMDPAR2(24)),
	dump_register(DEPCMDPAR2(25)),
	dump_register(DEPCMDPAR2(26)),
	dump_register(DEPCMDPAR2(27)),
	dump_register(DEPCMDPAR2(28)),
	dump_register(DEPCMDPAR2(29)),
	dump_register(DEPCMDPAR2(30)),
	dump_register(DEPCMDPAR2(31)),

	dump_register(DEPCMDPAR1(0)),
	dump_register(DEPCMDPAR1(1)),
	dump_register(DEPCMDPAR1(2)),
	dump_register(DEPCMDPAR1(3)),
	dump_register(DEPCMDPAR1(4)),
	dump_register(DEPCMDPAR1(5)),
	dump_register(DEPCMDPAR1(6)),
	dump_register(DEPCMDPAR1(7)),
	dump_register(DEPCMDPAR1(8)),
	dump_register(DEPCMDPAR1(9)),
	dump_register(DEPCMDPAR1(10)),
	dump_register(DEPCMDPAR1(11)),
	dump_register(DEPCMDPAR1(12)),
	dump_register(DEPCMDPAR1(13)),
	dump_register(DEPCMDPAR1(14)),
	dump_register(DEPCMDPAR1(15)),
	dump_register(DEPCMDPAR1(16)),
	dump_register(DEPCMDPAR1(17)),
	dump_register(DEPCMDPAR1(18)),
	dump_register(DEPCMDPAR1(19)),
	dump_register(DEPCMDPAR1(20)),
	dump_register(DEPCMDPAR1(21)),
	dump_register(DEPCMDPAR1(22)),
	dump_register(DEPCMDPAR1(23)),
	dump_register(DEPCMDPAR1(24)),
	dump_register(DEPCMDPAR1(25)),
	dump_register(DEPCMDPAR1(26)),
	dump_register(DEPCMDPAR1(27)),
	dump_register(DEPCMDPAR1(28)),
	dump_register(DEPCMDPAR1(29)),
	dump_register(DEPCMDPAR1(30)),
	dump_register(DEPCMDPAR1(31)),

	dump_register(DEPCMDPAR0(0)),
	dump_register(DEPCMDPAR0(1)),
	dump_register(DEPCMDPAR0(2)),
	dump_register(DEPCMDPAR0(3)),
	dump_register(DEPCMDPAR0(4)),
	dump_register(DEPCMDPAR0(5)),
	dump_register(DEPCMDPAR0(6)),
	dump_register(DEPCMDPAR0(7)),
	dump_register(DEPCMDPAR0(8)),
	dump_register(DEPCMDPAR0(9)),
	dump_register(DEPCMDPAR0(10)),
	dump_register(DEPCMDPAR0(11)),
	dump_register(DEPCMDPAR0(12)),
	dump_register(DEPCMDPAR0(13)),
	dump_register(DEPCMDPAR0(14)),
	dump_register(DEPCMDPAR0(15)),
	dump_register(DEPCMDPAR0(16)),
	dump_register(DEPCMDPAR0(17)),
	dump_register(DEPCMDPAR0(18)),
	dump_register(DEPCMDPAR0(19)),
	dump_register(DEPCMDPAR0(20)),
	dump_register(DEPCMDPAR0(21)),
	dump_register(DEPCMDPAR0(22)),
	dump_register(DEPCMDPAR0(23)),
	dump_register(DEPCMDPAR0(24)),
	dump_register(DEPCMDPAR0(25)),
	dump_register(DEPCMDPAR0(26)),
	dump_register(DEPCMDPAR0(27)),
	dump_register(DEPCMDPAR0(28)),
	dump_register(DEPCMDPAR0(29)),
	dump_register(DEPCMDPAR0(30)),
	dump_register(DEPCMDPAR0(31)),

	dump_register(DEPCMD(0)),
	dump_register(DEPCMD(1)),
	dump_register(DEPCMD(2)),
	dump_register(DEPCMD(3)),
	dump_register(DEPCMD(4)),
	dump_register(DEPCMD(5)),
	dump_register(DEPCMD(6)),
	dump_register(DEPCMD(7)),
	dump_register(DEPCMD(8)),
	dump_register(DEPCMD(9)),
	dump_register(DEPCMD(10)),
	dump_register(DEPCMD(11)),
	dump_register(DEPCMD(12)),
	dump_register(DEPCMD(13)),
	dump_register(DEPCMD(14)),
	dump_register(DEPCMD(15)),
	dump_register(DEPCMD(16)),
	dump_register(DEPCMD(17)),
	dump_register(DEPCMD(18)),
	dump_register(DEPCMD(19)),
	dump_register(DEPCMD(20)),
	dump_register(DEPCMD(21)),
	dump_register(DEPCMD(22)),
	dump_register(DEPCMD(23)),
	dump_register(DEPCMD(24)),
	dump_register(DEPCMD(25)),
	dump_register(DEPCMD(26)),
	dump_register(DEPCMD(27)),
	dump_register(DEPCMD(28)),
	dump_register(DEPCMD(29)),
	dump_register(DEPCMD(30)),
	dump_register(DEPCMD(31)),

	dump_register(OCFG),
	dump_register(OCTL),
	dump_register(OEVTEN),
	dump_register(OSTS),
	};

	static int dwc3_regdump_show(struct seq_file s, void unused)
	{
	struct dwc3 *dwc = s->private;

	seq_printf(s, "DesignWare USB3 Core Register Dump\n");
	debugfs_print_regs32(s, dwc3_regs, ARRAY_SIZE(dwc3_regs),
	dwc->regs, "");
	return 0;
	}

	static int dwc3_regdump_open(struct inode inode, struct file file)
	{
	return single_open(file, dwc3_regdump_show, inode->i_private);
	}

	static const struct file_operations dwc3_regdump_fops = {
	.open = dwc3_regdump_open,
	.read = seq_read,
	.release = single_release,
	};

	static int dwc3_mode_show(struct seq_file s, void unused)
	{
	struct dwc3 *dwc = s->private;
	unsigned long flags;
	u32 reg;

	spin_lock_irqsave(&dwc->lock, flags);
	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
	spin_unlock_irqrestore(&dwc->lock, flags);

	switch (DWC3_GCTL_PRTCAP(reg)) {
	case DWC3_GCTL_PRTCAP_HOST:
	seq_printf(s, "host\n");
	break;
	case DWC3_GCTL_PRTCAP_DEVICE:
	seq_printf(s, "device\n");
	break;
	case DWC3_GCTL_PRTCAP_OTG:
	seq_printf(s, "OTG\n");
	break;
	default:
	seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
	}

	return 0;
	}

	static int dwc3_mode_open(struct inode inode, struct file file)
	{
	return single_open(file, dwc3_mode_show, inode->i_private);
	}

	static ssize_t dwc3_mode_write(struct file *file,
	const char __user ubuf, size_t count, loff_t ppos)
	{
	struct seq_file *s = file->private_data;
	struct dwc3 *dwc = s->private;
	unsigned long flags;
	u32 mode = 0;
	char buf[32];

	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	return -EFAULT;

	if (!strncmp(buf, "host", 4))
	mode \|= DWC3_GCTL_PRTCAP_HOST;

	if (!strncmp(buf, "device", 6))
	mode \|= DWC3_GCTL_PRTCAP_DEVICE;

	if (!strncmp(buf, "otg", 3))
	mode \|= DWC3_GCTL_PRTCAP_OTG;

	if (mode) {
	spin_lock_irqsave(&dwc->lock, flags);
	dwc3_set_mode(dwc, mode);
	spin_unlock_irqrestore(&dwc->lock, flags);
	}
	return count;
	}

	static const struct file_operations dwc3_mode_fops = {
	.open = dwc3_mode_open,
	.write = dwc3_mode_write,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
	{
	struct dentry *root;
	struct dentry *file;
	int ret;

	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
	if (IS_ERR(root)) {
	ret = PTR_ERR(root);
	goto err0;
	}

	dwc->root = root;

	file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
	&dwc3_regdump_fops);
	if (IS_ERR(file)) {
	ret = PTR_ERR(file);
	goto err1;
	}

	file = debugfs_create_file("mode", S_IRUGO \| S_IWUSR, root,
	dwc, &dwc3_mode_fops);
	if (IS_ERR(file)) {
	ret = PTR_ERR(file);
	goto err1;
	}

	return 0;

	err1:
	debugfs_remove_recursive(root);

	err0:
	return ret;
	}

	void __devexit dwc3_debugfs_exit(struct dwc3 *dwc)
	{
	debugfs_remove_recursive(dwc->root);
	dwc->root = NULL;
	}