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 = dev_get_drvdata(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 = dev_get_drvdata(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 = 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(conn->hdev->workqueue, &conn->work_add);
166 void hci_conn_del_sysfs(struct hci_conn *conn)
168 BT_DBG("conn %p", conn);
170 queue_work(conn->hdev->workqueue, &conn->work_del);
173 static inline char *host_bustostr(int bus)
195 static inline char *host_typetostr(int type)
207 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
209 struct hci_dev *hdev = dev_get_drvdata(dev);
210 return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
213 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
215 struct hci_dev *hdev = dev_get_drvdata(dev);
216 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
219 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
221 struct hci_dev *hdev = dev_get_drvdata(dev);
222 char name[HCI_MAX_NAME_LENGTH + 1];
225 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
226 name[i] = hdev->dev_name[i];
228 name[HCI_MAX_NAME_LENGTH] = '\0';
229 return sprintf(buf, "%s\n", name);
232 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
234 struct hci_dev *hdev = dev_get_drvdata(dev);
235 return sprintf(buf, "0x%.2x%.2x%.2x\n",
236 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
239 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
241 struct hci_dev *hdev = dev_get_drvdata(dev);
242 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr));
245 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
247 struct hci_dev *hdev = dev_get_drvdata(dev);
249 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
250 hdev->features[0], hdev->features[1],
251 hdev->features[2], hdev->features[3],
252 hdev->features[4], hdev->features[5],
253 hdev->features[6], hdev->features[7]);
256 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
258 struct hci_dev *hdev = dev_get_drvdata(dev);
259 return sprintf(buf, "%d\n", hdev->manufacturer);
262 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
264 struct hci_dev *hdev = dev_get_drvdata(dev);
265 return sprintf(buf, "%d\n", hdev->hci_ver);
268 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
270 struct hci_dev *hdev = dev_get_drvdata(dev);
271 return sprintf(buf, "%d\n", hdev->hci_rev);
274 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
276 struct hci_dev *hdev = dev_get_drvdata(dev);
277 return sprintf(buf, "%d\n", hdev->idle_timeout);
280 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
282 struct hci_dev *hdev = dev_get_drvdata(dev);
286 rv = kstrtouint(buf, 0, &val);
290 if (val != 0 && (val < 500 || val > 3600000))
293 hdev->idle_timeout = val;
298 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
300 struct hci_dev *hdev = dev_get_drvdata(dev);
301 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
304 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
306 struct hci_dev *hdev = dev_get_drvdata(dev);
310 rv = kstrtou16(buf, 0, &val);
314 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
317 hdev->sniff_max_interval = val;
322 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
324 struct hci_dev *hdev = dev_get_drvdata(dev);
325 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
328 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
330 struct hci_dev *hdev = dev_get_drvdata(dev);
334 rv = kstrtou16(buf, 0, &val);
338 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
341 hdev->sniff_min_interval = val;
346 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
347 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
348 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
349 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
350 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
351 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
352 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
353 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
354 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
356 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
357 show_idle_timeout, store_idle_timeout);
358 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
359 show_sniff_max_interval, store_sniff_max_interval);
360 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
361 show_sniff_min_interval, store_sniff_min_interval);
363 static struct attribute *bt_host_attrs[] = {
367 &dev_attr_class.attr,
368 &dev_attr_address.attr,
369 &dev_attr_features.attr,
370 &dev_attr_manufacturer.attr,
371 &dev_attr_hci_version.attr,
372 &dev_attr_hci_revision.attr,
373 &dev_attr_idle_timeout.attr,
374 &dev_attr_sniff_max_interval.attr,
375 &dev_attr_sniff_min_interval.attr,
379 static struct attribute_group bt_host_group = {
380 .attrs = bt_host_attrs,
383 static const struct attribute_group *bt_host_groups[] = {
388 static void bt_host_release(struct device *dev)
390 void *data = dev_get_drvdata(dev);
394 static struct device_type bt_host = {
396 .groups = bt_host_groups,
397 .release = bt_host_release,
400 static int inquiry_cache_show(struct seq_file *f, void *p)
402 struct hci_dev *hdev = f->private;
403 struct inquiry_cache *cache = &hdev->inq_cache;
404 struct inquiry_entry *e;
406 hci_dev_lock_bh(hdev);
408 for (e = cache->list; e; e = e->next) {
409 struct inquiry_data *data = &e->data;
410 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
411 batostr(&data->bdaddr),
412 data->pscan_rep_mode, data->pscan_period_mode,
413 data->pscan_mode, data->dev_class[2],
414 data->dev_class[1], data->dev_class[0],
415 __le16_to_cpu(data->clock_offset),
416 data->rssi, data->ssp_mode, e->timestamp);
419 hci_dev_unlock_bh(hdev);
424 static int inquiry_cache_open(struct inode *inode, struct file *file)
426 return single_open(file, inquiry_cache_show, inode->i_private);
429 static const struct file_operations inquiry_cache_fops = {
430 .open = inquiry_cache_open,
433 .release = single_release,
436 static int blacklist_show(struct seq_file *f, void *p)
438 struct hci_dev *hdev = f->private;
439 struct bdaddr_list *b;
441 hci_dev_lock_bh(hdev);
443 list_for_each_entry(b, &hdev->blacklist, list)
444 seq_printf(f, "%s\n", batostr(&b->bdaddr));
446 hci_dev_unlock_bh(hdev);
451 static int blacklist_open(struct inode *inode, struct file *file)
453 return single_open(file, blacklist_show, inode->i_private);
456 static const struct file_operations blacklist_fops = {
457 .open = blacklist_open,
460 .release = single_release,
463 static void print_bt_uuid(struct seq_file *f, u8 *uuid)
466 u16 data1, data2, data3, data5;
468 memcpy(&data0, &uuid[0], 4);
469 memcpy(&data1, &uuid[4], 2);
470 memcpy(&data2, &uuid[6], 2);
471 memcpy(&data3, &uuid[8], 2);
472 memcpy(&data4, &uuid[10], 4);
473 memcpy(&data5, &uuid[14], 2);
475 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
476 ntohl(data0), ntohs(data1), ntohs(data2),
477 ntohs(data3), ntohl(data4), ntohs(data5));
480 static int uuids_show(struct seq_file *f, void *p)
482 struct hci_dev *hdev = f->private;
483 struct bt_uuid *uuid;
485 hci_dev_lock_bh(hdev);
487 list_for_each_entry(uuid, &hdev->uuids, list)
488 print_bt_uuid(f, uuid->uuid);
490 hci_dev_unlock_bh(hdev);
495 static int uuids_open(struct inode *inode, struct file *file)
497 return single_open(file, uuids_show, inode->i_private);
500 static const struct file_operations uuids_fops = {
504 .release = single_release,
507 static int auto_accept_delay_set(void *data, u64 val)
509 struct hci_dev *hdev = data;
511 hci_dev_lock_bh(hdev);
513 hdev->auto_accept_delay = val;
515 hci_dev_unlock_bh(hdev);
520 static int auto_accept_delay_get(void *data, u64 *val)
522 struct hci_dev *hdev = data;
524 hci_dev_lock_bh(hdev);
526 *val = hdev->auto_accept_delay;
528 hci_dev_unlock_bh(hdev);
533 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
534 auto_accept_delay_set, "%llu\n");
536 void hci_init_sysfs(struct hci_dev *hdev)
538 struct device *dev = &hdev->dev;
540 dev->type = &bt_host;
541 dev->class = bt_class;
543 dev_set_drvdata(dev, hdev);
544 device_initialize(dev);
547 int hci_add_sysfs(struct hci_dev *hdev)
549 struct device *dev = &hdev->dev;
552 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
554 dev->parent = hdev->parent;
555 dev_set_name(dev, "%s", hdev->name);
557 err = device_add(dev);
564 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
568 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
569 hdev, &inquiry_cache_fops);
571 debugfs_create_file("blacklist", 0444, hdev->debugfs,
572 hdev, &blacklist_fops);
574 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
576 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev,
577 &auto_accept_delay_fops);
581 void hci_del_sysfs(struct hci_dev *hdev)
583 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
585 debugfs_remove_recursive(hdev->debugfs);
587 device_del(&hdev->dev);
590 int __init bt_sysfs_init(void)
592 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
594 bt_class = class_create(THIS_MODULE, "bluetooth");
595 if (IS_ERR(bt_class))
596 return PTR_ERR(bt_class);
601 void bt_sysfs_cleanup(void)
603 class_destroy(bt_class);
605 debugfs_remove_recursive(bt_debugfs);