linux_kernel/drivers/usb/host/fhci-dbg.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Freescale QUICC Engine USB Host Controller Driver
 *
 * Copyright (c) Freescale Semicondutor, Inc. 2006.
 *               Shlomi Gridish <gridish@freescale.com>
 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
 * Copyright (c) Logic Product Development, Inc. 2007
 *               Peter Barada <peterb@logicpd.com>
 * Copyright (c) MontaVista Software, Inc. 2008.
 *               Anton Vorontsov <avorontsov@ru.mvista.com>
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "fhci.h"

void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
{
	int i;

	if (usb_er == -1) {
		fhci->usb_irq_stat[12]++;
		return;
	}

	for (i = 0; i < 12; ++i) {
		if (usb_er & (1 << i))
			fhci->usb_irq_stat[i]++;
	}
}

static int fhci_dfs_regs_show(struct seq_file *s, void *v)
{
	struct fhci_hcd *fhci = s->private;
	struct qe_usb_ctlr __iomem *regs = fhci->regs;

	seq_printf(s,
		"mode: 0x%x\n" "addr: 0x%x\n"
		"command: 0x%x\n" "ep0: 0x%x\n"
		"event: 0x%x\n" "mask: 0x%x\n"
		"status: 0x%x\n" "SOF timer: %d\n"
		"frame number: %d\n"
		"lines status: 0x%x\n",
		in_8(&regs->usb_usmod), in_8(&regs->usb_usadr),
		in_8(&regs->usb_uscom), in_be16(&regs->usb_usep[0]),
		in_be16(&regs->usb_usber), in_be16(&regs->usb_usbmr),
		in_8(&regs->usb_usbs), in_be16(&regs->usb_ussft),
		in_be16(&regs->usb_usfrn),
		fhci_ioports_check_bus_state(fhci));

	return 0;
}

static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
{
	struct fhci_hcd *fhci = s->private;
	int *usb_irq_stat = fhci->usb_irq_stat;

	seq_printf(s,
		"RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
		"SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
		"TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
		"RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
		"IDLE_ONLY: %d\n",
		usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
		usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
		usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
		usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
		usb_irq_stat[12]);

	return 0;
}

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

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

static const struct file_operations fhci_dfs_regs_fops = {
	.open = fhci_dfs_regs_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static const struct file_operations fhci_dfs_irq_stat_fops = {
	.open = fhci_dfs_irq_stat_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

void fhci_dfs_create(struct fhci_hcd *fhci)
{
	struct device *dev = fhci_to_hcd(fhci)->self.controller;

	fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
	if (!fhci->dfs_root) {
		WARN_ON(1);
		return;
	}

	fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
		fhci->dfs_root, fhci, &fhci_dfs_regs_fops);

	fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
		S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
		&fhci_dfs_irq_stat_fops);

	WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
}

void fhci_dfs_destroy(struct fhci_hcd *fhci)
{
	if (!fhci->dfs_root)
		return;

	debugfs_remove(fhci->dfs_irq_stat);
	debugfs_remove(fhci->dfs_regs);
	debugfs_remove(fhci->dfs_root);
}