drivers/usb/host/fhci-dbg.c

   1 /*
   2  * Freescale QUICC Engine USB Host Controller Driver
   3  *
   4  * Copyright (c) Freescale Semicondutor, Inc. 2006.
   5  *               Shlomi Gridish <gridish@freescale.com>
   6  *               Jerry Huang <Chang-Ming.Huang@freescale.com>
   7  * Copyright (c) Logic Product Development, Inc. 2007
   8  *               Peter Barada <peterb@logicpd.com>
   9  * Copyright (c) MontaVista Software, Inc. 2008.
  10  *               Anton Vorontsov <avorontsov@ru.mvista.com>
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/debugfs.h>
  21 #include <linux/seq_file.h>
  22 #include <linux/usb.h>
  23 #include <linux/usb/hcd.h>
  24 #include "fhci.h"
  25
  26 void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
  27 {
  28         int i;
  29
  30         if (usb_er == -1) {
  31                 fhci->usb_irq_stat[12]++;
  32                 return;
  33         }
  34
  35         for (i = 0; i < 12; ++i) {
  36                 if (usb_er & (1 << i))
  37                         fhci->usb_irq_stat[i]++;
  38         }
  39 }
  40
  41 static int fhci_dfs_regs_show(struct seq_file *s, void *v)
  42 {
  43         struct fhci_hcd *fhci = s->private;
  44         struct qe_usb_ctlr __iomem *regs = fhci->regs;
  45
  46         seq_printf(s,
  47                 "mode: 0x%x\n" "addr: 0x%x\n"
  48                 "command: 0x%x\n" "ep0: 0x%x\n"
  49                 "event: 0x%x\n" "mask: 0x%x\n"
  50                 "status: 0x%x\n" "SOF timer: %d\n"
  51                 "frame number: %d\n"
  52                 "lines status: 0x%x\n",
  53                 in_8(&regs->usb_usmod), in_8(&regs->usb_usadr),
  54                 in_8(&regs->usb_uscom), in_be16(&regs->usb_usep[0]),
  55                 in_be16(&regs->usb_usber), in_be16(&regs->usb_usbmr),
  56                 in_8(&regs->usb_usbs), in_be16(&regs->usb_ussft),
  57                 in_be16(&regs->usb_usfrn),
  58                 fhci_ioports_check_bus_state(fhci));
  59
  60         return 0;
  61 }
  62
  63 static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
  64 {
  65         struct fhci_hcd *fhci = s->private;
  66         int *usb_irq_stat = fhci->usb_irq_stat;
  67
  68         seq_printf(s,
  69                 "RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
  70                 "SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
  71                 "TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
  72                 "RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
  73                 "IDLE_ONLY: %d\n",
  74                 usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
  75                 usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
  76                 usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
  77                 usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
  78                 usb_irq_stat[12]);
  79
  80         return 0;
  81 }
  82
  83 static int fhci_dfs_regs_open(struct inode *inode, struct file *file)
  84 {
  85         return single_open(file, fhci_dfs_regs_show, inode->i_private);
  86 }
  87
  88 static int fhci_dfs_irq_stat_open(struct inode *inode, struct file *file)
  89 {
  90         return single_open(file, fhci_dfs_irq_stat_show, inode->i_private);
  91 }
  92
  93 static const struct file_operations fhci_dfs_regs_fops = {
  94         .open = fhci_dfs_regs_open,
  95         .read = seq_read,
  96         .llseek = seq_lseek,
  97         .release = single_release,
  98 };
  99
 100 static const struct file_operations fhci_dfs_irq_stat_fops = {
 101         .open = fhci_dfs_irq_stat_open,
 102         .read = seq_read,
 103         .llseek = seq_lseek,
 104         .release = single_release,
 105 };
 106
 107 void fhci_dfs_create(struct fhci_hcd *fhci)
 108 {
 109         struct device *dev = fhci_to_hcd(fhci)->self.controller;
 110
 111         fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
 112         if (!fhci->dfs_root) {
 113                 WARN_ON(1);
 114                 return;
 115         }
 116
 117         fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
 118                 fhci->dfs_root, fhci, &fhci_dfs_regs_fops);
 119
 120         fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
 121                 S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
 122                 &fhci_dfs_irq_stat_fops);
 123
 124         WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
 125 }
 126
 127 void fhci_dfs_destroy(struct fhci_hcd *fhci)
 128 {
 129         if (!fhci->dfs_root)
 130                 return;
 131
 132         if (fhci->dfs_irq_stat)
 133                 debugfs_remove(fhci->dfs_irq_stat);
 134
 135         if (fhci->dfs_regs)
 136                 debugfs_remove(fhci->dfs_regs);
 137
 138         debugfs_remove(fhci->dfs_root);
 139 }