drivers/usb/host/fhci-dbg.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Freescale QUICC Engine USB Host Controller Driver
   4  *
   5  * Copyright (c) Freescale Semicondutor, Inc. 2006.
   6  *               Shlomi Gridish <gridish@freescale.com>
   7  *               Jerry Huang <Chang-Ming.Huang@freescale.com>
   8  * Copyright (c) Logic Product Development, Inc. 2007
   9  *               Peter Barada <peterb@logicpd.com>
  10  * Copyright (c) MontaVista Software, Inc. 2008.
  11  *               Anton Vorontsov <avorontsov@ru.mvista.com>
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/debugfs.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/usb.h>
  19 #include <linux/usb/hcd.h>
  20 #include "fhci.h"
  21
  22 void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
  23 {
  24         int i;
  25
  26         if (usb_er == -1) {
  27                 fhci->usb_irq_stat[12]++;
  28                 return;
  29         }
  30
  31         for (i = 0; i < 12; ++i) {
  32                 if (usb_er & (1 << i))
  33                         fhci->usb_irq_stat[i]++;
  34         }
  35 }
  36
  37 static int fhci_dfs_regs_show(struct seq_file *s, void *v)
  38 {
  39         struct fhci_hcd *fhci = s->private;
  40         struct qe_usb_ctlr __iomem *regs = fhci->regs;
  41
  42         seq_printf(s,
  43                 "mode: 0x%x\n" "addr: 0x%x\n"
  44                 "command: 0x%x\n" "ep0: 0x%x\n"
  45                 "event: 0x%x\n" "mask: 0x%x\n"
  46                 "status: 0x%x\n" "SOF timer: %d\n"
  47                 "frame number: %d\n"
  48                 "lines status: 0x%x\n",
  49                 in_8(&regs->usb_usmod), in_8(&regs->usb_usadr),
  50                 in_8(&regs->usb_uscom), in_be16(&regs->usb_usep[0]),
  51                 in_be16(&regs->usb_usber), in_be16(&regs->usb_usbmr),
  52                 in_8(&regs->usb_usbs), in_be16(&regs->usb_ussft),
  53                 in_be16(&regs->usb_usfrn),
  54                 fhci_ioports_check_bus_state(fhci));
  55
  56         return 0;
  57 }
  58
  59 static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
  60 {
  61         struct fhci_hcd *fhci = s->private;
  62         int *usb_irq_stat = fhci->usb_irq_stat;
  63
  64         seq_printf(s,
  65                 "RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
  66                 "SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
  67                 "TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
  68                 "RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
  69                 "IDLE_ONLY: %d\n",
  70                 usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
  71                 usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
  72                 usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
  73                 usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
  74                 usb_irq_stat[12]);
  75
  76         return 0;
  77 }
  78
  79 static int fhci_dfs_regs_open(struct inode *inode, struct file *file)
  80 {
  81         return single_open(file, fhci_dfs_regs_show, inode->i_private);
  82 }
  83
  84 static int fhci_dfs_irq_stat_open(struct inode *inode, struct file *file)
  85 {
  86         return single_open(file, fhci_dfs_irq_stat_show, inode->i_private);
  87 }
  88
  89 static const struct file_operations fhci_dfs_regs_fops = {
  90         .open = fhci_dfs_regs_open,
  91         .read = seq_read,
  92         .llseek = seq_lseek,
  93         .release = single_release,
  94 };
  95
  96 static const struct file_operations fhci_dfs_irq_stat_fops = {
  97         .open = fhci_dfs_irq_stat_open,
  98         .read = seq_read,
  99         .llseek = seq_lseek,
 100         .release = single_release,
 101 };
 102
 103 void fhci_dfs_create(struct fhci_hcd *fhci)
 104 {
 105         struct device *dev = fhci_to_hcd(fhci)->self.controller;
 106
 107         fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
 108         if (!fhci->dfs_root) {
 109                 WARN_ON(1);
 110                 return;
 111         }
 112
 113         fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
 114                 fhci->dfs_root, fhci, &fhci_dfs_regs_fops);
 115
 116         fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
 117                 S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
 118                 &fhci_dfs_irq_stat_fops);
 119
 120         WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
 121 }
 122
 123 void fhci_dfs_destroy(struct fhci_hcd *fhci)
 124 {
 125         if (!fhci->dfs_root)
 126                 return;
 127
 128         debugfs_remove(fhci->dfs_irq_stat);
 129         debugfs_remove(fhci->dfs_regs);
 130         debugfs_remove(fhci->dfs_root);
 131 }