1 /* Bluetooth HCI driver model support. */
3 #include <linux/kernel.h>
4 #include <linux/slab.h>
5 #include <linux/init.h>
6 #include <linux/debugfs.h>
7 #include <linux/seq_file.h>
8 #include <linux/module.h>
10 #include <net/bluetooth/bluetooth.h>
11 #include <net/bluetooth/hci_core.h>
13 static struct class *bt_class;
15 struct dentry *bt_debugfs;
16 EXPORT_SYMBOL_GPL(bt_debugfs);
18 static inline char *link_typetostr(int type)
34 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
36 struct hci_conn *conn = to_hci_conn(dev);
37 return sprintf(buf, "%s\n", link_typetostr(conn->type));
40 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
42 struct hci_conn *conn = to_hci_conn(dev);
43 return sprintf(buf, "%s\n", batostr(&conn->dst));
46 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
48 struct hci_conn *conn = to_hci_conn(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 struct hci_conn *conn = to_hci_conn(dev);
86 static struct device_type bt_link = {
88 .groups = bt_link_groups,
89 .release = bt_link_release,
93 * The rfcomm tty device will possibly retain even when conn
94 * is down, and sysfs doesn't support move zombie device,
95 * so we should move the device before conn device is destroyed.
97 static int __match_tty(struct device *dev, void *data)
99 return !strncmp(dev_name(dev), "rfcomm", 6);
102 void hci_conn_init_sysfs(struct hci_conn *conn)
104 struct hci_dev *hdev = conn->hdev;
106 BT_DBG("conn %p", conn);
108 conn->dev.type = &bt_link;
109 conn->dev.class = bt_class;
110 conn->dev.parent = &hdev->dev;
112 device_initialize(&conn->dev);
115 void hci_conn_add_sysfs(struct hci_conn *conn)
117 struct hci_dev *hdev = conn->hdev;
119 BT_DBG("conn %p", conn);
121 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
123 if (device_add(&conn->dev) < 0) {
124 BT_ERR("Failed to register connection device");
131 void hci_conn_del_sysfs(struct hci_conn *conn)
133 struct hci_dev *hdev = conn->hdev;
135 if (!device_is_registered(&conn->dev))
141 dev = device_find_child(&conn->dev, NULL, __match_tty);
144 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
148 device_del(&conn->dev);
149 put_device(&conn->dev);
154 static inline char *host_bustostr(int bus)
176 static inline char *host_typetostr(int type)
188 static ssize_t show_bus(struct device *dev, 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, struct device_attribute *attr, char *buf)
196 struct hci_dev *hdev = to_hci_dev(dev);
197 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
200 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
202 struct hci_dev *hdev = to_hci_dev(dev);
203 char name[HCI_MAX_NAME_LENGTH + 1];
206 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
207 name[i] = hdev->dev_name[i];
209 name[HCI_MAX_NAME_LENGTH] = '\0';
210 return sprintf(buf, "%s\n", name);
213 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
215 struct hci_dev *hdev = to_hci_dev(dev);
216 return sprintf(buf, "0x%.2x%.2x%.2x\n",
217 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
220 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
222 struct hci_dev *hdev = to_hci_dev(dev);
223 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr));
226 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
228 struct hci_dev *hdev = to_hci_dev(dev);
230 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
231 hdev->features[0], hdev->features[1],
232 hdev->features[2], hdev->features[3],
233 hdev->features[4], hdev->features[5],
234 hdev->features[6], hdev->features[7]);
237 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
239 struct hci_dev *hdev = to_hci_dev(dev);
240 return sprintf(buf, "%d\n", hdev->manufacturer);
243 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
245 struct hci_dev *hdev = to_hci_dev(dev);
246 return sprintf(buf, "%d\n", hdev->hci_ver);
249 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
251 struct hci_dev *hdev = to_hci_dev(dev);
252 return sprintf(buf, "%d\n", hdev->hci_rev);
255 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
257 struct hci_dev *hdev = to_hci_dev(dev);
258 return sprintf(buf, "%d\n", hdev->idle_timeout);
261 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
263 struct hci_dev *hdev = to_hci_dev(dev);
267 rv = kstrtouint(buf, 0, &val);
271 if (val != 0 && (val < 500 || val > 3600000))
274 hdev->idle_timeout = val;
279 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
281 struct hci_dev *hdev = to_hci_dev(dev);
282 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
285 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
287 struct hci_dev *hdev = to_hci_dev(dev);
291 rv = kstrtou16(buf, 0, &val);
295 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
298 hdev->sniff_max_interval = val;
303 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
305 struct hci_dev *hdev = to_hci_dev(dev);
306 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
309 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
311 struct hci_dev *hdev = to_hci_dev(dev);
315 rv = kstrtou16(buf, 0, &val);
319 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
322 hdev->sniff_min_interval = val;
327 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
328 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
329 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
330 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
331 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
332 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
333 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
334 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
335 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
337 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
338 show_idle_timeout, store_idle_timeout);
339 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
340 show_sniff_max_interval, store_sniff_max_interval);
341 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
342 show_sniff_min_interval, store_sniff_min_interval);
344 static struct attribute *bt_host_attrs[] = {
348 &dev_attr_class.attr,
349 &dev_attr_address.attr,
350 &dev_attr_features.attr,
351 &dev_attr_manufacturer.attr,
352 &dev_attr_hci_version.attr,
353 &dev_attr_hci_revision.attr,
354 &dev_attr_idle_timeout.attr,
355 &dev_attr_sniff_max_interval.attr,
356 &dev_attr_sniff_min_interval.attr,
360 static struct attribute_group bt_host_group = {
361 .attrs = bt_host_attrs,
364 static const struct attribute_group *bt_host_groups[] = {
369 static void bt_host_release(struct device *dev)
371 struct hci_dev *hdev = to_hci_dev(dev);
373 module_put(THIS_MODULE);
376 static struct device_type bt_host = {
378 .groups = bt_host_groups,
379 .release = bt_host_release,
382 static int inquiry_cache_show(struct seq_file *f, void *p)
384 struct hci_dev *hdev = f->private;
385 struct discovery_state *cache = &hdev->discovery;
386 struct inquiry_entry *e;
390 list_for_each_entry(e, &cache->all, all) {
391 struct inquiry_data *data = &e->data;
392 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
393 batostr(&data->bdaddr),
394 data->pscan_rep_mode, data->pscan_period_mode,
395 data->pscan_mode, data->dev_class[2],
396 data->dev_class[1], data->dev_class[0],
397 __le16_to_cpu(data->clock_offset),
398 data->rssi, data->ssp_mode, e->timestamp);
401 hci_dev_unlock(hdev);
406 static int inquiry_cache_open(struct inode *inode, struct file *file)
408 return single_open(file, inquiry_cache_show, inode->i_private);
411 static const struct file_operations inquiry_cache_fops = {
412 .open = inquiry_cache_open,
415 .release = single_release,
418 static int blacklist_show(struct seq_file *f, void *p)
420 struct hci_dev *hdev = f->private;
421 struct bdaddr_list *b;
425 list_for_each_entry(b, &hdev->blacklist, list)
426 seq_printf(f, "%s\n", batostr(&b->bdaddr));
428 hci_dev_unlock(hdev);
433 static int blacklist_open(struct inode *inode, struct file *file)
435 return single_open(file, blacklist_show, inode->i_private);
438 static const struct file_operations blacklist_fops = {
439 .open = blacklist_open,
442 .release = single_release,
445 static void print_bt_uuid(struct seq_file *f, u8 *uuid)
448 __be16 data1, data2, data3, data5;
450 memcpy(&data0, &uuid[0], 4);
451 memcpy(&data1, &uuid[4], 2);
452 memcpy(&data2, &uuid[6], 2);
453 memcpy(&data3, &uuid[8], 2);
454 memcpy(&data4, &uuid[10], 4);
455 memcpy(&data5, &uuid[14], 2);
457 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
458 ntohl(data0), ntohs(data1), ntohs(data2),
459 ntohs(data3), ntohl(data4), ntohs(data5));
462 static int uuids_show(struct seq_file *f, void *p)
464 struct hci_dev *hdev = f->private;
465 struct bt_uuid *uuid;
469 list_for_each_entry(uuid, &hdev->uuids, list)
470 print_bt_uuid(f, uuid->uuid);
472 hci_dev_unlock(hdev);
477 static int uuids_open(struct inode *inode, struct file *file)
479 return single_open(file, uuids_show, inode->i_private);
482 static const struct file_operations uuids_fops = {
486 .release = single_release,
489 static int auto_accept_delay_set(void *data, u64 val)
491 struct hci_dev *hdev = data;
495 hdev->auto_accept_delay = val;
497 hci_dev_unlock(hdev);
502 static int auto_accept_delay_get(void *data, u64 *val)
504 struct hci_dev *hdev = data;
508 *val = hdev->auto_accept_delay;
510 hci_dev_unlock(hdev);
515 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
516 auto_accept_delay_set, "%llu\n");
518 void hci_init_sysfs(struct hci_dev *hdev)
520 struct device *dev = &hdev->dev;
522 dev->type = &bt_host;
523 dev->class = bt_class;
525 __module_get(THIS_MODULE);
526 device_initialize(dev);
529 int hci_add_sysfs(struct hci_dev *hdev)
531 struct device *dev = &hdev->dev;
534 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
536 dev_set_name(dev, "%s", hdev->name);
538 err = device_add(dev);
545 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
549 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
550 hdev, &inquiry_cache_fops);
552 debugfs_create_file("blacklist", 0444, hdev->debugfs,
553 hdev, &blacklist_fops);
555 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
557 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev,
558 &auto_accept_delay_fops);
562 void hci_del_sysfs(struct hci_dev *hdev)
564 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
566 debugfs_remove_recursive(hdev->debugfs);
568 device_del(&hdev->dev);
571 int __init bt_sysfs_init(void)
573 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
575 bt_class = class_create(THIS_MODULE, "bluetooth");
576 if (IS_ERR(bt_class))
577 return PTR_ERR(bt_class);
582 void bt_sysfs_cleanup(void)
584 class_destroy(bt_class);
586 debugfs_remove_recursive(bt_debugfs);