hci_sysfs.c revision a91f2e396f5b32b21d842b4757bc8de5e88eac66 
1/* Bluetooth HCI driver model support. */
2
3#include <linux/kernel.h>
4#include <linux/init.h>
5
6#include <linux/platform_device.h>
7
8#include <net/bluetooth/bluetooth.h>
9#include <net/bluetooth/hci_core.h>
10
11#ifndef CONFIG_BT_HCI_CORE_DEBUG
12#undef  BT_DBG
13#define BT_DBG(D...)
14#endif
15
16static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
17{
18	struct hci_dev *hdev = dev_get_drvdata(dev);
19	return sprintf(buf, "%s\n", hdev->name);
20}
21
22static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
23{
24	struct hci_dev *hdev = dev_get_drvdata(dev);
25	return sprintf(buf, "%d\n", hdev->type);
26}
27
28static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
29{
30	struct hci_dev *hdev = dev_get_drvdata(dev);
31	bdaddr_t bdaddr;
32	baswap(&bdaddr, &hdev->bdaddr);
33	return sprintf(buf, "%s\n", batostr(&bdaddr));
34}
35
36static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
37{
38	struct hci_dev *hdev = dev_get_drvdata(dev);
39	return sprintf(buf, "0x%lx\n", hdev->flags);
40}
41
42static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
43{
44	struct hci_dev *hdev = dev_get_drvdata(dev);
45	struct inquiry_cache *cache = &hdev->inq_cache;
46	struct inquiry_entry *e;
47	int n = 0;
48
49	hci_dev_lock_bh(hdev);
50
51	for (e = cache->list; e; e = e->next) {
52		struct inquiry_data *data = &e->data;
53		bdaddr_t bdaddr;
54		baswap(&bdaddr, &data->bdaddr);
55		n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
56				batostr(&bdaddr),
57				data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
58				data->dev_class[2], data->dev_class[1], data->dev_class[0],
59				__le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
60	}
61
62	hci_dev_unlock_bh(hdev);
63	return n;
64}
65
66static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
67{
68	struct hci_dev *hdev = dev_get_drvdata(dev);
69	return sprintf(buf, "%d\n", hdev->idle_timeout);
70}
71
72static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
73{
74	struct hci_dev *hdev = dev_get_drvdata(dev);
75	char *ptr;
76	__u32 val;
77
78	val = simple_strtoul(buf, &ptr, 10);
79	if (ptr == buf)
80		return -EINVAL;
81
82	if (val != 0 && (val < 500 || val > 3600000))
83		return -EINVAL;
84
85	hdev->idle_timeout = val;
86
87	return count;
88}
89
90static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
91{
92	struct hci_dev *hdev = dev_get_drvdata(dev);
93	return sprintf(buf, "%d\n", hdev->sniff_max_interval);
94}
95
96static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
97{
98	struct hci_dev *hdev = dev_get_drvdata(dev);
99	char *ptr;
100	__u16 val;
101
102	val = simple_strtoul(buf, &ptr, 10);
103	if (ptr == buf)
104		return -EINVAL;
105
106	if (val < 0x0002 || val > 0xFFFE || val % 2)
107		return -EINVAL;
108
109	if (val < hdev->sniff_min_interval)
110		return -EINVAL;
111
112	hdev->sniff_max_interval = val;
113
114	return count;
115}
116
117static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
118{
119	struct hci_dev *hdev = dev_get_drvdata(dev);
120	return sprintf(buf, "%d\n", hdev->sniff_min_interval);
121}
122
123static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
124{
125	struct hci_dev *hdev = dev_get_drvdata(dev);
126	char *ptr;
127	__u16 val;
128
129	val = simple_strtoul(buf, &ptr, 10);
130	if (ptr == buf)
131		return -EINVAL;
132
133	if (val < 0x0002 || val > 0xFFFE || val % 2)
134		return -EINVAL;
135
136	if (val > hdev->sniff_max_interval)
137		return -EINVAL;
138
139	hdev->sniff_min_interval = val;
140
141	return count;
142}
143
144static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
145static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
146static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
147static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
148static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
149
150static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
151				show_idle_timeout, store_idle_timeout);
152static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
153				show_sniff_max_interval, store_sniff_max_interval);
154static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
155				show_sniff_min_interval, store_sniff_min_interval);
156
157static struct device_attribute *bt_attrs[] = {
158	&dev_attr_name,
159	&dev_attr_type,
160	&dev_attr_address,
161	&dev_attr_flags,
162	&dev_attr_inquiry_cache,
163	&dev_attr_idle_timeout,
164	&dev_attr_sniff_max_interval,
165	&dev_attr_sniff_min_interval,
166	NULL
167};
168
169struct class *bt_class = NULL;
170EXPORT_SYMBOL_GPL(bt_class);
171
172static struct bus_type bt_bus = {
173	.name	= "bluetooth",
174};
175
176static struct platform_device *bt_platform;
177
178static void bt_release(struct device *dev)
179{
180	struct hci_dev *hdev = dev_get_drvdata(dev);
181	kfree(hdev);
182}
183
184int hci_register_sysfs(struct hci_dev *hdev)
185{
186	struct device *dev = &hdev->dev;
187	unsigned int i;
188	int err;
189
190	BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
191
192	dev->class = bt_class;
193
194	if (hdev->parent)
195		dev->parent = hdev->parent;
196	else
197		dev->parent = &bt_platform->dev;
198
199	strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
200
201	dev->release = bt_release;
202
203	dev_set_drvdata(dev, hdev);
204
205	err = device_register(dev);
206	if (err < 0)
207		return err;
208
209	for (i = 0; bt_attrs[i]; i++)
210		device_create_file(dev, bt_attrs[i]);
211
212	return 0;
213}
214
215void hci_unregister_sysfs(struct hci_dev *hdev)
216{
217	struct device *dev = &hdev->dev;
218
219	BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
220
221	device_del(dev);
222}
223
224int __init bt_sysfs_init(void)
225{
226	int err;
227
228	bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
229	if (IS_ERR(bt_platform))
230		return PTR_ERR(bt_platform);
231
232	err = bus_register(&bt_bus);
233	if (err < 0) {
234		platform_device_unregister(bt_platform);
235		return err;
236	}
237
238	bt_class = class_create(THIS_MODULE, "bluetooth");
239	if (IS_ERR(bt_class)) {
240		bus_unregister(&bt_bus);
241		platform_device_unregister(bt_platform);
242		return PTR_ERR(bt_class);
243	}
244
245	return 0;
246}
247
248void __exit bt_sysfs_cleanup(void)
249{
250	class_destroy(bt_class);
251
252	bus_unregister(&bt_bus);
253
254	platform_device_unregister(bt_platform);
255}
256