fhci-dbg.c

Go to the documentation of this file.

/*
 * Freescale QUICC Engine USB Host Controller Driver
 *
 * Copyright (c) Freescale Semicondutor, Inc. 2006.
 *               Shlomi Gridish <[email protected]>
 *               Jerry Huang <[email protected]>
 * Copyright (c) Logic Product Development, Inc. 2007
 *               Peter Barada <[email protected]>
 * Copyright (c) MontaVista Software, Inc. 2008.
 *               Anton Vorontsov <[email protected]>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#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;

    if (fhci->dfs_irq_stat)
        debugfs_remove(fhci->dfs_irq_stat);

    if (fhci->dfs_regs)
        debugfs_remove(fhci->dfs_regs);

    debugfs_remove(fhci->dfs_root);
}