1 /* Bluetooth HCI driver model support. */ 2 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 9 #include <net/bluetooth/bluetooth.h> 10 #include <net/bluetooth/hci_core.h> 11 12 static struct class *bt_class; 13 14 struct dentry *bt_debugfs = NULL; 15 EXPORT_SYMBOL_GPL(bt_debugfs); 16 17 static inline char *link_typetostr(int type) 18 { 19 switch (type) { 20 case ACL_LINK: 21 return "ACL"; 22 case SCO_LINK: 23 return "SCO"; 24 case ESCO_LINK: 25 return "eSCO"; 26 default: 27 return "UNKNOWN"; 28 } 29 } 30 31 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) 32 { 33 struct hci_conn *conn = dev_get_drvdata(dev); 34 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 35 } 36 37 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) 38 { 39 struct hci_conn *conn = dev_get_drvdata(dev); 40 bdaddr_t bdaddr; 41 baswap(&bdaddr, &conn->dst); 42 return sprintf(buf, "%s\n", batostr(&bdaddr)); 43 } 44 45 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) 46 { 47 struct hci_conn *conn = dev_get_drvdata(dev); 48 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]); 54 } 55 56 #define LINK_ATTR(_name,_mode,_show,_store) \ 57 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) 58 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); 62 63 static struct attribute *bt_link_attrs[] = { 64 &link_attr_type.attr, 65 &link_attr_address.attr, 66 &link_attr_features.attr, 67 NULL 68 }; 69 70 static struct attribute_group bt_link_group = { 71 .attrs = bt_link_attrs, 72 }; 73 74 static const struct attribute_group *bt_link_groups[] = { 75 &bt_link_group, 76 NULL 77 }; 78 79 static void bt_link_release(struct device *dev) 80 { 81 void *data = dev_get_drvdata(dev); 82 kfree(data); 83 } 84 85 static struct device_type bt_link = { 86 .name = "link", 87 .groups = bt_link_groups, 88 .release = bt_link_release, 89 }; 90 91 static void add_conn(struct work_struct *work) 92 { 93 struct hci_conn *conn = container_of(work, struct hci_conn, work_add); 94 struct hci_dev *hdev = conn->hdev; 95 96 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 97 98 dev_set_drvdata(&conn->dev, conn); 99 100 if (device_add(&conn->dev) < 0) { 101 BT_ERR("Failed to register connection device"); 102 return; 103 } 104 105 hci_dev_hold(hdev); 106 } 107 108 /* 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. 112 */ 113 static int __match_tty(struct device *dev, void *data) 114 { 115 return !strncmp(dev_name(dev), "rfcomm", 6); 116 } 117 118 static void del_conn(struct work_struct *work) 119 { 120 struct hci_conn *conn = container_of(work, struct hci_conn, work_del); 121 struct hci_dev *hdev = conn->hdev; 122 123 if (!device_is_registered(&conn->dev)) 124 return; 125 126 while (1) { 127 struct device *dev; 128 129 dev = device_find_child(&conn->dev, NULL, __match_tty); 130 if (!dev) 131 break; 132 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 133 put_device(dev); 134 } 135 136 device_del(&conn->dev); 137 put_device(&conn->dev); 138 139 hci_dev_put(hdev); 140 } 141 142 void hci_conn_init_sysfs(struct hci_conn *conn) 143 { 144 struct hci_dev *hdev = conn->hdev; 145 146 BT_DBG("conn %p", conn); 147 148 conn->dev.type = &bt_link; 149 conn->dev.class = bt_class; 150 conn->dev.parent = &hdev->dev; 151 152 device_initialize(&conn->dev); 153 154 INIT_WORK(&conn->work_add, add_conn); 155 INIT_WORK(&conn->work_del, del_conn); 156 } 157 158 void hci_conn_add_sysfs(struct hci_conn *conn) 159 { 160 BT_DBG("conn %p", conn); 161 162 queue_work(conn->hdev->workqueue, &conn->work_add); 163 } 164 165 void hci_conn_del_sysfs(struct hci_conn *conn) 166 { 167 BT_DBG("conn %p", conn); 168 169 queue_work(conn->hdev->workqueue, &conn->work_del); 170 } 171 172 static inline char *host_bustostr(int bus) 173 { 174 switch (bus) { 175 case HCI_VIRTUAL: 176 return "VIRTUAL"; 177 case HCI_USB: 178 return "USB"; 179 case HCI_PCCARD: 180 return "PCCARD"; 181 case HCI_UART: 182 return "UART"; 183 case HCI_RS232: 184 return "RS232"; 185 case HCI_PCI: 186 return "PCI"; 187 case HCI_SDIO: 188 return "SDIO"; 189 default: 190 return "UNKNOWN"; 191 } 192 } 193 194 static inline char *host_typetostr(int type) 195 { 196 switch (type) { 197 case HCI_BREDR: 198 return "BR/EDR"; 199 case HCI_80211: 200 return "802.11"; 201 default: 202 return "UNKNOWN"; 203 } 204 } 205 206 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) 207 { 208 struct hci_dev *hdev = dev_get_drvdata(dev); 209 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 210 } 211 212 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 213 { 214 struct hci_dev *hdev = dev_get_drvdata(dev); 215 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 216 } 217 218 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 219 { 220 struct hci_dev *hdev = dev_get_drvdata(dev); 221 char name[249]; 222 int i; 223 224 for (i = 0; i < 248; i++) 225 name[i] = hdev->dev_name[i]; 226 227 name[248] = '\0'; 228 return sprintf(buf, "%s\n", name); 229 } 230 231 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 232 { 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]); 236 } 237 238 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 239 { 240 struct hci_dev *hdev = dev_get_drvdata(dev); 241 bdaddr_t bdaddr; 242 baswap(&bdaddr, &hdev->bdaddr); 243 return sprintf(buf, "%s\n", batostr(&bdaddr)); 244 } 245 246 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 247 { 248 struct hci_dev *hdev = dev_get_drvdata(dev); 249 250 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]); 255 } 256 257 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 258 { 259 struct hci_dev *hdev = dev_get_drvdata(dev); 260 return sprintf(buf, "%d\n", hdev->manufacturer); 261 } 262 263 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 264 { 265 struct hci_dev *hdev = dev_get_drvdata(dev); 266 return sprintf(buf, "%d\n", hdev->hci_ver); 267 } 268 269 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 270 { 271 struct hci_dev *hdev = dev_get_drvdata(dev); 272 return sprintf(buf, "%d\n", hdev->hci_rev); 273 } 274 275 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 276 { 277 struct hci_dev *hdev = dev_get_drvdata(dev); 278 return sprintf(buf, "%d\n", hdev->idle_timeout); 279 } 280 281 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 282 { 283 struct hci_dev *hdev = dev_get_drvdata(dev); 284 unsigned long val; 285 286 if (strict_strtoul(buf, 0, &val) < 0) 287 return -EINVAL; 288 289 if (val != 0 && (val < 500 || val > 3600000)) 290 return -EINVAL; 291 292 hdev->idle_timeout = val; 293 294 return count; 295 } 296 297 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 298 { 299 struct hci_dev *hdev = dev_get_drvdata(dev); 300 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 301 } 302 303 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 304 { 305 struct hci_dev *hdev = dev_get_drvdata(dev); 306 unsigned long val; 307 308 if (strict_strtoul(buf, 0, &val) < 0) 309 return -EINVAL; 310 311 if (val < 0x0002 || val > 0xFFFE || val % 2) 312 return -EINVAL; 313 314 if (val < hdev->sniff_min_interval) 315 return -EINVAL; 316 317 hdev->sniff_max_interval = val; 318 319 return count; 320 } 321 322 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 323 { 324 struct hci_dev *hdev = dev_get_drvdata(dev); 325 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 326 } 327 328 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 329 { 330 struct hci_dev *hdev = dev_get_drvdata(dev); 331 unsigned long val; 332 333 if (strict_strtoul(buf, 0, &val) < 0) 334 return -EINVAL; 335 336 if (val < 0x0002 || val > 0xFFFE || val % 2) 337 return -EINVAL; 338 339 if (val > hdev->sniff_max_interval) 340 return -EINVAL; 341 342 hdev->sniff_min_interval = val; 343 344 return count; 345 } 346 347 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 348 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 349 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 350 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 351 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 352 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 353 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 354 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 355 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 356 357 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 358 show_idle_timeout, store_idle_timeout); 359 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 360 show_sniff_max_interval, store_sniff_max_interval); 361 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 362 show_sniff_min_interval, store_sniff_min_interval); 363 364 static struct attribute *bt_host_attrs[] = { 365 &dev_attr_bus.attr, 366 &dev_attr_type.attr, 367 &dev_attr_name.attr, 368 &dev_attr_class.attr, 369 &dev_attr_address.attr, 370 &dev_attr_features.attr, 371 &dev_attr_manufacturer.attr, 372 &dev_attr_hci_version.attr, 373 &dev_attr_hci_revision.attr, 374 &dev_attr_idle_timeout.attr, 375 &dev_attr_sniff_max_interval.attr, 376 &dev_attr_sniff_min_interval.attr, 377 NULL 378 }; 379 380 static struct attribute_group bt_host_group = { 381 .attrs = bt_host_attrs, 382 }; 383 384 static const struct attribute_group *bt_host_groups[] = { 385 &bt_host_group, 386 NULL 387 }; 388 389 static void bt_host_release(struct device *dev) 390 { 391 void *data = dev_get_drvdata(dev); 392 kfree(data); 393 } 394 395 static struct device_type bt_host = { 396 .name = "host", 397 .groups = bt_host_groups, 398 .release = bt_host_release, 399 }; 400 401 static int inquiry_cache_show(struct seq_file *f, void *p) 402 { 403 struct hci_dev *hdev = f->private; 404 struct inquiry_cache *cache = &hdev->inq_cache; 405 struct inquiry_entry *e; 406 407 hci_dev_lock_bh(hdev); 408 409 for (e = cache->list; e; e = e->next) { 410 struct inquiry_data *data = &e->data; 411 bdaddr_t bdaddr; 412 baswap(&bdaddr, &data->bdaddr); 413 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 414 batostr(&bdaddr), 415 data->pscan_rep_mode, data->pscan_period_mode, 416 data->pscan_mode, data->dev_class[2], 417 data->dev_class[1], data->dev_class[0], 418 __le16_to_cpu(data->clock_offset), 419 data->rssi, data->ssp_mode, e->timestamp); 420 } 421 422 hci_dev_unlock_bh(hdev); 423 424 return 0; 425 } 426 427 static int inquiry_cache_open(struct inode *inode, struct file *file) 428 { 429 return single_open(file, inquiry_cache_show, inode->i_private); 430 } 431 432 static const struct file_operations inquiry_cache_fops = { 433 .open = inquiry_cache_open, 434 .read = seq_read, 435 .llseek = seq_lseek, 436 .release = single_release, 437 }; 438 439 static int blacklist_show(struct seq_file *f, void *p) 440 { 441 struct hci_dev *hdev = f->private; 442 struct list_head *l; 443 444 hci_dev_lock_bh(hdev); 445 446 list_for_each(l, &hdev->blacklist) { 447 struct bdaddr_list *b; 448 bdaddr_t bdaddr; 449 450 b = list_entry(l, struct bdaddr_list, list); 451 452 baswap(&bdaddr, &b->bdaddr); 453 454 seq_printf(f, "%s\n", batostr(&bdaddr)); 455 } 456 457 hci_dev_unlock_bh(hdev); 458 459 return 0; 460 } 461 462 static int blacklist_open(struct inode *inode, struct file *file) 463 { 464 return single_open(file, blacklist_show, inode->i_private); 465 } 466 467 static const struct file_operations blacklist_fops = { 468 .open = blacklist_open, 469 .read = seq_read, 470 .llseek = seq_lseek, 471 .release = single_release, 472 }; 473 int hci_register_sysfs(struct hci_dev *hdev) 474 { 475 struct device *dev = &hdev->dev; 476 int err; 477 478 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 479 480 dev->type = &bt_host; 481 dev->class = bt_class; 482 dev->parent = hdev->parent; 483 484 dev_set_name(dev, "%s", hdev->name); 485 486 dev_set_drvdata(dev, hdev); 487 488 err = device_register(dev); 489 if (err < 0) 490 return err; 491 492 if (!bt_debugfs) 493 return 0; 494 495 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 496 if (!hdev->debugfs) 497 return 0; 498 499 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 500 hdev, &inquiry_cache_fops); 501 502 debugfs_create_file("blacklist", 0444, hdev->debugfs, 503 hdev, &blacklist_fops); 504 505 return 0; 506 } 507 508 void hci_unregister_sysfs(struct hci_dev *hdev) 509 { 510 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 511 512 debugfs_remove_recursive(hdev->debugfs); 513 514 device_del(&hdev->dev); 515 } 516 517 int __init bt_sysfs_init(void) 518 { 519 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 520 521 bt_class = class_create(THIS_MODULE, "bluetooth"); 522 if (IS_ERR(bt_class)) 523 return PTR_ERR(bt_class); 524 525 return 0; 526 } 527 528 void bt_sysfs_cleanup(void) 529 { 530 class_destroy(bt_class); 531 532 debugfs_remove_recursive(bt_debugfs); 533 } 534