1 /* Bluetooth HCI driver model support. */
3 #include <linux/debugfs.h>
4 #include <linux/module.h>
6 #include <net/bluetooth/bluetooth.h>
7 #include <net/bluetooth/hci_core.h>
9 static struct class *bt_class;
11 struct dentry *bt_debugfs;
12 EXPORT_SYMBOL_GPL(bt_debugfs);
14 static inline char *link_typetostr(int type)
30 static ssize_t show_link_type(struct device *dev,
31 struct device_attribute *attr, char *buf)
33 struct hci_conn *conn = to_hci_conn(dev);
34 return sprintf(buf, "%s\n", link_typetostr(conn->type));
37 static ssize_t show_link_address(struct device *dev,
38 struct device_attribute *attr, char *buf)
40 struct hci_conn *conn = to_hci_conn(dev);
41 return sprintf(buf, "%pMR\n", &conn->dst);
44 static ssize_t show_link_features(struct device *dev,
45 struct device_attribute *attr, char *buf)
47 struct hci_conn *conn = to_hci_conn(dev);
49 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
50 conn->features[0], conn->features[1],
51 conn->features[2], conn->features[3],
52 conn->features[4], conn->features[5],
53 conn->features[6], conn->features[7]);
56 #define LINK_ATTR(_name, _mode, _show, _store) \
57 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
59 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
60 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
61 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
63 static struct attribute *bt_link_attrs[] = {
65 &link_attr_address.attr,
66 &link_attr_features.attr,
70 static struct attribute_group bt_link_group = {
71 .attrs = bt_link_attrs,
74 static const struct attribute_group *bt_link_groups[] = {
79 static void bt_link_release(struct device *dev)
81 struct hci_conn *conn = to_hci_conn(dev);
85 static struct device_type bt_link = {
87 .groups = bt_link_groups,
88 .release = bt_link_release,
92 * The rfcomm tty device will possibly retain even when conn
93 * is down, and sysfs doesn't support move zombie device,
94 * so we should move the device before conn device is destroyed.
96 static int __match_tty(struct device *dev, void *data)
98 return !strncmp(dev_name(dev), "rfcomm", 6);
101 void hci_conn_init_sysfs(struct hci_conn *conn)
103 struct hci_dev *hdev = conn->hdev;
105 BT_DBG("conn %p", conn);
107 conn->dev.type = &bt_link;
108 conn->dev.class = bt_class;
109 conn->dev.parent = &hdev->dev;
111 device_initialize(&conn->dev);
114 void hci_conn_add_sysfs(struct hci_conn *conn)
116 struct hci_dev *hdev = conn->hdev;
118 BT_DBG("conn %p", conn);
120 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
122 if (device_add(&conn->dev) < 0) {
123 BT_ERR("Failed to register connection device");
130 void hci_conn_del_sysfs(struct hci_conn *conn)
132 struct hci_dev *hdev = conn->hdev;
134 if (!device_is_registered(&conn->dev))
140 dev = device_find_child(&conn->dev, NULL, __match_tty);
143 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
147 device_del(&conn->dev);
148 put_device(&conn->dev);
153 static inline char *host_bustostr(int bus)
175 static inline char *host_typetostr(int type)
187 static ssize_t show_bus(struct device *dev,
188 struct device_attribute *attr, char *buf)
190 struct hci_dev *hdev = to_hci_dev(dev);
191 return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
194 static ssize_t show_type(struct device *dev,
195 struct device_attribute *attr, char *buf)
197 struct hci_dev *hdev = to_hci_dev(dev);
198 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
201 static ssize_t show_name(struct device *dev,
202 struct device_attribute *attr, char *buf)
204 struct hci_dev *hdev = to_hci_dev(dev);
205 char name[HCI_MAX_NAME_LENGTH + 1];
208 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
209 name[i] = hdev->dev_name[i];
211 name[HCI_MAX_NAME_LENGTH] = '\0';
212 return sprintf(buf, "%s\n", name);
215 static ssize_t show_class(struct device *dev,
216 struct device_attribute *attr, char *buf)
218 struct hci_dev *hdev = to_hci_dev(dev);
219 return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
220 hdev->dev_class[1], hdev->dev_class[0]);
223 static ssize_t show_address(struct device *dev,
224 struct device_attribute *attr, char *buf)
226 struct hci_dev *hdev = to_hci_dev(dev);
227 return sprintf(buf, "%pMR\n", &hdev->bdaddr);
230 static ssize_t show_features(struct device *dev,
231 struct device_attribute *attr, char *buf)
233 struct hci_dev *hdev = to_hci_dev(dev);
235 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
236 hdev->features[0], hdev->features[1],
237 hdev->features[2], hdev->features[3],
238 hdev->features[4], hdev->features[5],
239 hdev->features[6], hdev->features[7]);
242 static ssize_t show_manufacturer(struct device *dev,
243 struct device_attribute *attr, char *buf)
245 struct hci_dev *hdev = to_hci_dev(dev);
246 return sprintf(buf, "%d\n", hdev->manufacturer);
249 static ssize_t show_hci_version(struct device *dev,
250 struct device_attribute *attr, char *buf)
252 struct hci_dev *hdev = to_hci_dev(dev);
253 return sprintf(buf, "%d\n", hdev->hci_ver);
256 static ssize_t show_hci_revision(struct device *dev,
257 struct device_attribute *attr, char *buf)
259 struct hci_dev *hdev = to_hci_dev(dev);
260 return sprintf(buf, "%d\n", hdev->hci_rev);
263 static ssize_t show_idle_timeout(struct device *dev,
264 struct device_attribute *attr, char *buf)
266 struct hci_dev *hdev = to_hci_dev(dev);
267 return sprintf(buf, "%d\n", hdev->idle_timeout);
270 static ssize_t store_idle_timeout(struct device *dev,
271 struct device_attribute *attr,
272 const char *buf, size_t count)
274 struct hci_dev *hdev = to_hci_dev(dev);
278 rv = kstrtouint(buf, 0, &val);
282 if (val != 0 && (val < 500 || val > 3600000))
285 hdev->idle_timeout = val;
290 static ssize_t show_sniff_max_interval(struct device *dev,
291 struct device_attribute *attr, char *buf)
293 struct hci_dev *hdev = to_hci_dev(dev);
294 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
297 static ssize_t store_sniff_max_interval(struct device *dev,
298 struct device_attribute *attr,
299 const char *buf, size_t count)
301 struct hci_dev *hdev = to_hci_dev(dev);
305 rv = kstrtou16(buf, 0, &val);
309 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
312 hdev->sniff_max_interval = val;
317 static ssize_t show_sniff_min_interval(struct device *dev,
318 struct device_attribute *attr, char *buf)
320 struct hci_dev *hdev = to_hci_dev(dev);
321 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
324 static ssize_t store_sniff_min_interval(struct device *dev,
325 struct device_attribute *attr,
326 const char *buf, size_t count)
328 struct hci_dev *hdev = to_hci_dev(dev);
332 rv = kstrtou16(buf, 0, &val);
336 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
339 hdev->sniff_min_interval = val;
344 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
345 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
346 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
347 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
348 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
349 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
350 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
351 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
352 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
354 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
355 show_idle_timeout, store_idle_timeout);
356 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
357 show_sniff_max_interval, store_sniff_max_interval);
358 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
359 show_sniff_min_interval, store_sniff_min_interval);
361 static struct attribute *bt_host_attrs[] = {
365 &dev_attr_class.attr,
366 &dev_attr_address.attr,
367 &dev_attr_features.attr,
368 &dev_attr_manufacturer.attr,
369 &dev_attr_hci_version.attr,
370 &dev_attr_hci_revision.attr,
371 &dev_attr_idle_timeout.attr,
372 &dev_attr_sniff_max_interval.attr,
373 &dev_attr_sniff_min_interval.attr,
377 static struct attribute_group bt_host_group = {
378 .attrs = bt_host_attrs,
381 static const struct attribute_group *bt_host_groups[] = {
386 static void bt_host_release(struct device *dev)
388 struct hci_dev *hdev = to_hci_dev(dev);
390 module_put(THIS_MODULE);
393 static struct device_type bt_host = {
395 .groups = bt_host_groups,
396 .release = bt_host_release,
399 static int inquiry_cache_show(struct seq_file *f, void *p)
401 struct hci_dev *hdev = f->private;
402 struct discovery_state *cache = &hdev->discovery;
403 struct inquiry_entry *e;
407 list_for_each_entry(e, &cache->all, all) {
408 struct inquiry_data *data = &e->data;
409 seq_printf(f, "%pMR %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(hdev);
423 static int inquiry_cache_open(struct inode *inode, struct file *file)
425 return single_open(file, inquiry_cache_show, inode->i_private);
428 static const struct file_operations inquiry_cache_fops = {
429 .open = inquiry_cache_open,
432 .release = single_release,
435 static int blacklist_show(struct seq_file *f, void *p)
437 struct hci_dev *hdev = f->private;
438 struct bdaddr_list *b;
442 list_for_each_entry(b, &hdev->blacklist, list)
443 seq_printf(f, "%pMR\n", &b->bdaddr);
445 hci_dev_unlock(hdev);
450 static int blacklist_open(struct inode *inode, struct file *file)
452 return single_open(file, blacklist_show, inode->i_private);
455 static const struct file_operations blacklist_fops = {
456 .open = blacklist_open,
459 .release = single_release,
462 static void print_bt_uuid(struct seq_file *f, u8 *uuid)
465 __be16 data1, data2, data3, data5;
467 memcpy(&data0, &uuid[0], 4);
468 memcpy(&data1, &uuid[4], 2);
469 memcpy(&data2, &uuid[6], 2);
470 memcpy(&data3, &uuid[8], 2);
471 memcpy(&data4, &uuid[10], 4);
472 memcpy(&data5, &uuid[14], 2);
474 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
475 ntohl(data0), ntohs(data1), ntohs(data2), ntohs(data3),
476 ntohl(data4), ntohs(data5));
479 static int uuids_show(struct seq_file *f, void *p)
481 struct hci_dev *hdev = f->private;
482 struct bt_uuid *uuid;
486 list_for_each_entry(uuid, &hdev->uuids, list)
487 print_bt_uuid(f, uuid->uuid);
489 hci_dev_unlock(hdev);
494 static int uuids_open(struct inode *inode, struct file *file)
496 return single_open(file, uuids_show, inode->i_private);
499 static const struct file_operations uuids_fops = {
503 .release = single_release,
506 static int auto_accept_delay_set(void *data, u64 val)
508 struct hci_dev *hdev = data;
512 hdev->auto_accept_delay = val;
514 hci_dev_unlock(hdev);
519 static int auto_accept_delay_get(void *data, u64 *val)
521 struct hci_dev *hdev = data;
525 *val = hdev->auto_accept_delay;
527 hci_dev_unlock(hdev);
532 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
533 auto_accept_delay_set, "%llu\n");
535 void hci_init_sysfs(struct hci_dev *hdev)
537 struct device *dev = &hdev->dev;
539 dev->type = &bt_host;
540 dev->class = bt_class;
542 __module_get(THIS_MODULE);
543 device_initialize(dev);
546 int hci_add_sysfs(struct hci_dev *hdev)
548 struct device *dev = &hdev->dev;
551 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
553 dev_set_name(dev, "%s", hdev->name);
555 err = device_add(dev);
562 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
566 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
567 hdev, &inquiry_cache_fops);
569 debugfs_create_file("blacklist", 0444, hdev->debugfs,
570 hdev, &blacklist_fops);
572 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
574 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev,
575 &auto_accept_delay_fops);
579 void hci_del_sysfs(struct hci_dev *hdev)
581 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
583 debugfs_remove_recursive(hdev->debugfs);
585 device_del(&hdev->dev);
588 int __init bt_sysfs_init(void)
590 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
592 bt_class = class_create(THIS_MODULE, "bluetooth");
593 if (IS_ERR(bt_class))
594 return PTR_ERR(bt_class);
599 void bt_sysfs_cleanup(void)
601 class_destroy(bt_class);
603 debugfs_remove_recursive(bt_debugfs);