2 * Copyright (c) 2012 Broadcom Corporation
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.
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.
16 #include <linux/debugfs.h>
17 #include <linux/netdevice.h>
18 #include <linux/module.h>
20 #include <brcmu_wifi.h>
21 #include <brcmu_utils.h>
26 static struct dentry *root_folder;
28 void brcmf_debugfs_init(void)
30 root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
31 if (IS_ERR(root_folder))
35 void brcmf_debugfs_exit(void)
40 debugfs_remove_recursive(root_folder);
44 static int brcmf_debugfs_chipinfo_read(struct seq_file *seq, void *data)
46 struct brcmf_bus *bus = dev_get_drvdata(seq->private);
48 seq_printf(seq, "chip: %x(%u) rev %u\n",
49 bus->chip, bus->chip, bus->chiprev);
53 int brcmf_debugfs_attach(struct brcmf_pub *drvr)
55 struct device *dev = drvr->bus_if->dev;
60 drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
61 brcmf_debugfs_add_entry(drvr, "chipinfo", brcmf_debugfs_chipinfo_read);
63 return PTR_ERR_OR_ZERO(drvr->dbgfs_dir);
66 void brcmf_debugfs_detach(struct brcmf_pub *drvr)
68 if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
69 debugfs_remove_recursive(drvr->dbgfs_dir);
72 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
74 return drvr->dbgfs_dir;
77 struct brcmf_debugfs_entry {
78 int (*read)(struct seq_file *seq, void *data);
79 struct brcmf_pub *drvr;
82 static int brcmf_debugfs_entry_open(struct inode *inode, struct file *f)
84 struct brcmf_debugfs_entry *entry = inode->i_private;
86 return single_open(f, entry->read, entry->drvr->bus_if->dev);
89 static const struct file_operations brcmf_debugfs_def_ops = {
91 .open = brcmf_debugfs_entry_open,
92 .release = single_release,
97 int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
98 int (*read_fn)(struct seq_file *seq, void *data))
100 struct dentry *dentry = drvr->dbgfs_dir;
101 struct brcmf_debugfs_entry *entry;
103 if (IS_ERR_OR_NULL(dentry))
106 entry = devm_kzalloc(drvr->bus_if->dev, sizeof(*entry), GFP_KERNEL);
110 entry->read = read_fn;
113 dentry = debugfs_create_file(fn, S_IRUGO, dentry, entry,
114 &brcmf_debugfs_def_ops);
116 return PTR_ERR_OR_ZERO(dentry);