1 /* Bluetooth HCI driver model support. */
3 #include <linux/kernel.h>
4 #include <linux/init.h>
5 #include <linux/debugfs.h>
7 #include <net/bluetooth/bluetooth.h>
8 #include <net/bluetooth/hci_core.h>
10 struct class *bt_class = NULL;
11 EXPORT_SYMBOL_GPL(bt_class);
13 struct dentry *bt_debugfs = NULL;
14 EXPORT_SYMBOL_GPL(bt_debugfs);
16 static struct workqueue_struct *bt_workq;
18 static inline char *link_typetostr(int type)
32 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
34 struct hci_conn *conn = dev_get_drvdata(dev);
35 return sprintf(buf, "%s\n", link_typetostr(conn->type));
38 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
40 struct hci_conn *conn = dev_get_drvdata(dev);
42 baswap(&bdaddr, &conn->dst);
43 return sprintf(buf, "%s\n", batostr(&bdaddr));
46 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
48 struct hci_conn *conn = dev_get_drvdata(dev);
50 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
51 conn->features[0], conn->features[1],
52 conn->features[2], conn->features[3],
53 conn->features[4], conn->features[5],
54 conn->features[6], conn->features[7]);
57 #define LINK_ATTR(_name,_mode,_show,_store) \
58 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
60 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
61 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
62 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
64 static struct attribute *bt_link_attrs[] = {
66 &link_attr_address.attr,
67 &link_attr_features.attr,
71 static struct attribute_group bt_link_group = {
72 .attrs = bt_link_attrs,
75 static const struct attribute_group *bt_link_groups[] = {
80 static void bt_link_release(struct device *dev)
82 void *data = dev_get_drvdata(dev);
86 static struct device_type bt_link = {
88 .groups = bt_link_groups,
89 .release = bt_link_release,
92 static void add_conn(struct work_struct *work)
94 struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
95 struct hci_dev *hdev = conn->hdev;
97 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
99 dev_set_drvdata(&conn->dev, conn);
101 if (device_add(&conn->dev) < 0) {
102 BT_ERR("Failed to register connection device");
110 * The rfcomm tty device will possibly retain even when conn
111 * is down, and sysfs doesn't support move zombie device,
112 * so we should move the device before conn device is destroyed.
114 static int __match_tty(struct device *dev, void *data)
116 return !strncmp(dev_name(dev), "rfcomm", 6);
119 static void del_conn(struct work_struct *work)
121 struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
122 struct hci_dev *hdev = conn->hdev;
124 if (!device_is_registered(&conn->dev))
130 dev = device_find_child(&conn->dev, NULL, __match_tty);
133 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
137 device_del(&conn->dev);
138 put_device(&conn->dev);
143 void hci_conn_init_sysfs(struct hci_conn *conn)
145 struct hci_dev *hdev = conn->hdev;
147 BT_DBG("conn %p", conn);
149 conn->dev.type = &bt_link;
150 conn->dev.class = bt_class;
151 conn->dev.parent = &hdev->dev;
153 device_initialize(&conn->dev);
155 INIT_WORK(&conn->work_add, add_conn);
156 INIT_WORK(&conn->work_del, del_conn);
159 void hci_conn_add_sysfs(struct hci_conn *conn)
161 BT_DBG("conn %p", conn);
163 queue_work(bt_workq, &conn->work_add);
166 void hci_conn_del_sysfs(struct hci_conn *conn)
168 BT_DBG("conn %p", conn);
170 queue_work(bt_workq, &conn->work_del);
173 static inline char *host_bustostr(int bus)
195 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
197 struct hci_dev *hdev = dev_get_drvdata(dev);
198 return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
201 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
203 struct hci_dev *hdev = dev_get_drvdata(dev);
207 for (i = 0; i < 248; i++)
208 name[i] = hdev->dev_name[i];
211 return sprintf(buf, "%s\n", name);
214 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
216 struct hci_dev *hdev = dev_get_drvdata(dev);
217 return sprintf(buf, "0x%.2x%.2x%.2x\n",
218 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
221 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
223 struct hci_dev *hdev = dev_get_drvdata(dev);
225 baswap(&bdaddr, &hdev->bdaddr);
226 return sprintf(buf, "%s\n", batostr(&bdaddr));
229 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
231 struct hci_dev *hdev = dev_get_drvdata(dev);
233 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
234 hdev->features[0], hdev->features[1],
235 hdev->features[2], hdev->features[3],
236 hdev->features[4], hdev->features[5],
237 hdev->features[6], hdev->features[7]);
240 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
242 struct hci_dev *hdev = dev_get_drvdata(dev);
243 return sprintf(buf, "%d\n", hdev->manufacturer);
246 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
248 struct hci_dev *hdev = dev_get_drvdata(dev);
249 return sprintf(buf, "%d\n", hdev->hci_ver);
252 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
254 struct hci_dev *hdev = dev_get_drvdata(dev);
255 return sprintf(buf, "%d\n", hdev->hci_rev);
258 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
260 struct hci_dev *hdev = dev_get_drvdata(dev);
261 return sprintf(buf, "%d\n", hdev->idle_timeout);
264 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
266 struct hci_dev *hdev = dev_get_drvdata(dev);
270 val = simple_strtoul(buf, &ptr, 10);
274 if (val != 0 && (val < 500 || val > 3600000))
277 hdev->idle_timeout = val;
282 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
284 struct hci_dev *hdev = dev_get_drvdata(dev);
285 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
288 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
290 struct hci_dev *hdev = dev_get_drvdata(dev);
294 val = simple_strtoul(buf, &ptr, 10);
298 if (val < 0x0002 || val > 0xFFFE || val % 2)
301 if (val < hdev->sniff_min_interval)
304 hdev->sniff_max_interval = val;
309 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
311 struct hci_dev *hdev = dev_get_drvdata(dev);
312 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
315 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
317 struct hci_dev *hdev = dev_get_drvdata(dev);
321 val = simple_strtoul(buf, &ptr, 10);
325 if (val < 0x0002 || val > 0xFFFE || val % 2)
328 if (val > hdev->sniff_max_interval)
331 hdev->sniff_min_interval = val;
336 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
337 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
338 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
339 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
340 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
341 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
342 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
343 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
345 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
346 show_idle_timeout, store_idle_timeout);
347 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
348 show_sniff_max_interval, store_sniff_max_interval);
349 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
350 show_sniff_min_interval, store_sniff_min_interval);
352 static struct attribute *bt_host_attrs[] = {
355 &dev_attr_class.attr,
356 &dev_attr_address.attr,
357 &dev_attr_features.attr,
358 &dev_attr_manufacturer.attr,
359 &dev_attr_hci_version.attr,
360 &dev_attr_hci_revision.attr,
361 &dev_attr_idle_timeout.attr,
362 &dev_attr_sniff_max_interval.attr,
363 &dev_attr_sniff_min_interval.attr,
367 static struct attribute_group bt_host_group = {
368 .attrs = bt_host_attrs,
371 static const struct attribute_group *bt_host_groups[] = {
376 static void bt_host_release(struct device *dev)
378 void *data = dev_get_drvdata(dev);
382 static struct device_type bt_host = {
384 .groups = bt_host_groups,
385 .release = bt_host_release,
388 static int inquiry_cache_open(struct inode *inode, struct file *file)
390 file->private_data = inode->i_private;
394 static ssize_t inquiry_cache_read(struct file *file, char __user *userbuf,
395 size_t count, loff_t *ppos)
397 struct hci_dev *hdev = file->private_data;
398 struct inquiry_cache *cache = &hdev->inq_cache;
399 struct inquiry_entry *e;
403 hci_dev_lock_bh(hdev);
405 for (e = cache->list; e; e = e->next) {
406 struct inquiry_data *data = &e->data;
408 baswap(&bdaddr, &data->bdaddr);
409 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
411 data->pscan_rep_mode, data->pscan_period_mode,
412 data->pscan_mode, data->dev_class[2],
413 data->dev_class[1], data->dev_class[0],
414 __le16_to_cpu(data->clock_offset),
415 data->rssi, data->ssp_mode, e->timestamp);
418 hci_dev_unlock_bh(hdev);
420 return simple_read_from_buffer(userbuf, count, ppos, buf, n);
423 static const struct file_operations inquiry_cache_fops = {
424 .open = inquiry_cache_open,
425 .read = inquiry_cache_read,
428 int hci_register_sysfs(struct hci_dev *hdev)
430 struct device *dev = &hdev->dev;
433 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
435 dev->type = &bt_host;
436 dev->class = bt_class;
437 dev->parent = hdev->parent;
439 dev_set_name(dev, "%s", hdev->name);
441 dev_set_drvdata(dev, hdev);
443 err = device_register(dev);
450 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
454 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
455 hdev, &inquiry_cache_fops);
460 void hci_unregister_sysfs(struct hci_dev *hdev)
462 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
464 debugfs_remove_recursive(hdev->debugfs);
466 device_del(&hdev->dev);
469 int __init bt_sysfs_init(void)
471 bt_workq = create_singlethread_workqueue("bluetooth");
475 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
477 bt_class = class_create(THIS_MODULE, "bluetooth");
478 if (IS_ERR(bt_class)) {
479 destroy_workqueue(bt_workq);
480 return PTR_ERR(bt_class);
486 void bt_sysfs_cleanup(void)
488 class_destroy(bt_class);
490 debugfs_remove_recursive(bt_debugfs);
492 destroy_workqueue(bt_workq);