tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
22void 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
37static 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(®s->usb_usmod), in_8(®s->usb_usadr),
50 in_8(®s->usb_uscom), in_be16(®s->usb_usep[0]),
51 in_be16(®s->usb_usber), in_be16(®s->usb_usbmr),
52 in_8(®s->usb_usbs), in_be16(®s->usb_ussft),
53 in_be16(®s->usb_usfrn),
54 fhci_ioports_check_bus_state(fhci));
55
56 return 0;
57}
58
59static 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
79static 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
84static 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
89static 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
96static 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
103void 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
123void 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}