1/*
2 * Copyright (c) 2012 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16#include <linux/debugfs.h>
17#include <linux/netdevice.h>
18#include <linux/module.h>
19
20#include <brcmu_wifi.h>
21#include <brcmu_utils.h>
22#include "core.h"
23#include "bus.h"
24#include "debug.h"
25
26static struct dentry *root_folder;
27
28void brcmf_debugfs_init(void)
29{
30	root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
31	if (IS_ERR(root_folder))
32		root_folder = NULL;
33}
34
35void brcmf_debugfs_exit(void)
36{
37	if (!root_folder)
38		return;
39
40	debugfs_remove_recursive(root_folder);
41	root_folder = NULL;
42}
43
44static int brcmf_debugfs_chipinfo_read(struct seq_file *seq, void *data)
45{
46	struct brcmf_bus *bus = dev_get_drvdata(seq->private);
47
48	seq_printf(seq, "chip: %x(%u) rev %u\n",
49		   bus->chip, bus->chip, bus->chiprev);
50	return 0;
51}
52
53int brcmf_debugfs_attach(struct brcmf_pub *drvr)
54{
55	struct device *dev = drvr->bus_if->dev;
56
57	if (!root_folder)
58		return -ENODEV;
59
60	drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
61	brcmf_debugfs_add_entry(drvr, "chipinfo", brcmf_debugfs_chipinfo_read);
62
63	return PTR_ERR_OR_ZERO(drvr->dbgfs_dir);
64}
65
66void brcmf_debugfs_detach(struct brcmf_pub *drvr)
67{
68	if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
69		debugfs_remove_recursive(drvr->dbgfs_dir);
70}
71
72struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
73{
74	return drvr->dbgfs_dir;
75}
76
77struct brcmf_debugfs_entry {
78	int (*read)(struct seq_file *seq, void *data);
79	struct brcmf_pub *drvr;
80};
81
82static int brcmf_debugfs_entry_open(struct inode *inode, struct file *f)
83{
84	struct brcmf_debugfs_entry *entry = inode->i_private;
85
86	return single_open(f, entry->read, entry->drvr->bus_if->dev);
87}
88
89static const struct file_operations brcmf_debugfs_def_ops = {
90	.owner = THIS_MODULE,
91	.open = brcmf_debugfs_entry_open,
92	.release = single_release,
93	.read = seq_read,
94	.llseek = seq_lseek
95};
96
97int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
98			    int (*read_fn)(struct seq_file *seq, void *data))
99{
100	struct dentry *dentry =  drvr->dbgfs_dir;
101	struct brcmf_debugfs_entry *entry;
102
103	if (IS_ERR_OR_NULL(dentry))
104		return -ENOENT;
105
106	entry = devm_kzalloc(drvr->bus_if->dev, sizeof(*entry), GFP_KERNEL);
107	if (!entry)
108		return -ENOMEM;
109
110	entry->read = read_fn;
111	entry->drvr = drvr;
112
113	dentry = debugfs_create_file(fn, S_IRUGO, dentry, entry,
114				     &brcmf_debugfs_def_ops);
115
116	return PTR_ERR_OR_ZERO(dentry);
117}
118