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>
9 #include <net/bluetooth/bluetooth.h>
10 #include <net/bluetooth/hci_core.h>
12 static struct class *bt_class;
14 struct dentry *bt_debugfs = NULL;
15 EXPORT_SYMBOL_GPL(bt_debugfs);
17 static inline char *link_typetostr(int type)
31 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
33 struct hci_conn *conn = dev_get_drvdata(dev);
34 return sprintf(buf, "%s\n", link_typetostr(conn->type));
37 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
39 struct hci_conn *conn = dev_get_drvdata(dev);
41 baswap(&bdaddr, &conn->dst);
42 return sprintf(buf, "%s\n", batostr(&bdaddr));
45 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
47 struct hci_conn *conn = dev_get_drvdata(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 void *data = dev_get_drvdata(dev);
85 static struct device_type bt_link = {
87 .groups = bt_link_groups,
88 .release = bt_link_release,
91 static void add_conn(struct work_struct *work)
93 struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
94 struct hci_dev *hdev = conn->hdev;
96 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
98 dev_set_drvdata(&conn->dev, conn);
100 if (device_add(&conn->dev) < 0) {
101 BT_ERR("Failed to register connection device");
109 * The rfcomm tty device will possibly retain even when conn
110 * is down, and sysfs doesn't support move zombie device,
111 * so we should move the device before conn device is destroyed.
113 static int __match_tty(struct device *dev, void *data)
115 return !strncmp(dev_name(dev), "rfcomm", 6);
118 static void del_conn(struct work_struct *work)
120 struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
121 struct hci_dev *hdev = conn->hdev;
123 if (!device_is_registered(&conn->dev))
129 dev = device_find_child(&conn->dev, NULL, __match_tty);
132 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
136 device_del(&conn->dev);
137 put_device(&conn->dev);
142 void hci_conn_init_sysfs(struct hci_conn *conn)
144 struct hci_dev *hdev = conn->hdev;
146 BT_DBG("conn %p", conn);
148 conn->dev.type = &bt_link;
149 conn->dev.class = bt_class;
150 conn->dev.parent = &hdev->dev;
152 device_initialize(&conn->dev);
154 INIT_WORK(&conn->work_add, add_conn);
155 INIT_WORK(&conn->work_del, del_conn);
158 void hci_conn_add_sysfs(struct hci_conn *conn)
160 BT_DBG("conn %p", conn);
162 queue_work(conn->hdev->workqueue, &conn->work_add);
165 void hci_conn_del_sysfs(struct hci_conn *conn)
167 BT_DBG("conn %p", conn);
169 queue_work(conn->hdev->workqueue, &conn->work_del);
172 static inline char *host_bustostr(int bus)
194 static inline char *host_typetostr(int type)
206 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
208 struct hci_dev *hdev = dev_get_drvdata(dev);
209 return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
212 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
214 struct hci_dev *hdev = dev_get_drvdata(dev);
215 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
218 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
220 struct hci_dev *hdev = dev_get_drvdata(dev);
224 for (i = 0; i < 248; i++)
225 name[i] = hdev->dev_name[i];
228 return sprintf(buf, "%s\n", name);
231 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
233 struct hci_dev *hdev = dev_get_drvdata(dev);
234 return sprintf(buf, "0x%.2x%.2x%.2x\n",
235 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
238 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
240 struct hci_dev *hdev = dev_get_drvdata(dev);
242 baswap(&bdaddr, &hdev->bdaddr);
243 return sprintf(buf, "%s\n", batostr(&bdaddr));
246 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
248 struct hci_dev *hdev = dev_get_drvdata(dev);
250 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
251 hdev->features[0], hdev->features[1],
252 hdev->features[2], hdev->features[3],
253 hdev->features[4], hdev->features[5],
254 hdev->features[6], hdev->features[7]);
257 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
259 struct hci_dev *hdev = dev_get_drvdata(dev);
260 return sprintf(buf, "%d\n", hdev->manufacturer);
263 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
265 struct hci_dev *hdev = dev_get_drvdata(dev);
266 return sprintf(buf, "%d\n", hdev->hci_ver);
269 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
271 struct hci_dev *hdev = dev_get_drvdata(dev);
272 return sprintf(buf, "%d\n", hdev->hci_rev);
275 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
277 struct hci_dev *hdev = dev_get_drvdata(dev);
278 return sprintf(buf, "%d\n", hdev->idle_timeout);
281 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
283 struct hci_dev *hdev = dev_get_drvdata(dev);
287 val = simple_strtoul(buf, &ptr, 10);
291 if (val != 0 && (val < 500 || val > 3600000))
294 hdev->idle_timeout = val;
299 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
301 struct hci_dev *hdev = dev_get_drvdata(dev);
302 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
305 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
307 struct hci_dev *hdev = dev_get_drvdata(dev);
311 val = simple_strtoul(buf, &ptr, 10);
315 if (val < 0x0002 || val > 0xFFFE || val % 2)
318 if (val < hdev->sniff_min_interval)
321 hdev->sniff_max_interval = val;
326 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
328 struct hci_dev *hdev = dev_get_drvdata(dev);
329 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
332 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
334 struct hci_dev *hdev = dev_get_drvdata(dev);
338 val = simple_strtoul(buf, &ptr, 10);
342 if (val < 0x0002 || val > 0xFFFE || val % 2)
345 if (val > hdev->sniff_max_interval)
348 hdev->sniff_min_interval = val;
353 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
354 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
355 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
356 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
357 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
358 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
359 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
360 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
361 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
363 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
364 show_idle_timeout, store_idle_timeout);
365 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
366 show_sniff_max_interval, store_sniff_max_interval);
367 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
368 show_sniff_min_interval, store_sniff_min_interval);
370 static struct attribute *bt_host_attrs[] = {
374 &dev_attr_class.attr,
375 &dev_attr_address.attr,
376 &dev_attr_features.attr,
377 &dev_attr_manufacturer.attr,
378 &dev_attr_hci_version.attr,
379 &dev_attr_hci_revision.attr,
380 &dev_attr_idle_timeout.attr,
381 &dev_attr_sniff_max_interval.attr,
382 &dev_attr_sniff_min_interval.attr,
386 static struct attribute_group bt_host_group = {
387 .attrs = bt_host_attrs,
390 static const struct attribute_group *bt_host_groups[] = {
395 static void bt_host_release(struct device *dev)
397 void *data = dev_get_drvdata(dev);
401 static struct device_type bt_host = {
403 .groups = bt_host_groups,
404 .release = bt_host_release,
407 static int inquiry_cache_show(struct seq_file *f, void *p)
409 struct hci_dev *hdev = f->private;
410 struct inquiry_cache *cache = &hdev->inq_cache;
411 struct inquiry_entry *e;
413 hci_dev_lock_bh(hdev);
415 for (e = cache->list; e; e = e->next) {
416 struct inquiry_data *data = &e->data;
418 baswap(&bdaddr, &data->bdaddr);
419 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
421 data->pscan_rep_mode, data->pscan_period_mode,
422 data->pscan_mode, data->dev_class[2],
423 data->dev_class[1], data->dev_class[0],
424 __le16_to_cpu(data->clock_offset),
425 data->rssi, data->ssp_mode, e->timestamp);
428 hci_dev_unlock_bh(hdev);
433 static int inquiry_cache_open(struct inode *inode, struct file *file)
435 return single_open(file, inquiry_cache_show, inode->i_private);
438 static const struct file_operations inquiry_cache_fops = {
439 .open = inquiry_cache_open,
442 .release = single_release,
445 int hci_register_sysfs(struct hci_dev *hdev)
447 struct device *dev = &hdev->dev;
450 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
452 dev->type = &bt_host;
453 dev->class = bt_class;
454 dev->parent = hdev->parent;
456 dev_set_name(dev, "%s", hdev->name);
458 dev_set_drvdata(dev, hdev);
460 err = device_register(dev);
467 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
471 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
472 hdev, &inquiry_cache_fops);
477 void hci_unregister_sysfs(struct hci_dev *hdev)
479 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
481 debugfs_remove_recursive(hdev->debugfs);
483 device_del(&hdev->dev);
486 int __init bt_sysfs_init(void)
488 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
490 bt_class = class_create(THIS_MODULE, "bluetooth");
491 if (IS_ERR(bt_class))
492 return PTR_ERR(bt_class);
497 void bt_sysfs_cleanup(void)
499 class_destroy(bt_class);
501 debugfs_remove_recursive(bt_debugfs);