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 return sprintf(buf, "%s\n", batostr(&conn->dst)); 41 } 42 43 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) 44 { 45 struct hci_conn *conn = dev_get_drvdata(dev); 46 47 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 48 conn->features[0], conn->features[1], 49 conn->features[2], conn->features[3], 50 conn->features[4], conn->features[5], 51 conn->features[6], conn->features[7]); 52 } 53 54 #define LINK_ATTR(_name,_mode,_show,_store) \ 55 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) 56 57 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 58 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 59 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 60 61 static struct attribute *bt_link_attrs[] = { 62 &link_attr_type.attr, 63 &link_attr_address.attr, 64 &link_attr_features.attr, 65 NULL 66 }; 67 68 static struct attribute_group bt_link_group = { 69 .attrs = bt_link_attrs, 70 }; 71 72 static const struct attribute_group *bt_link_groups[] = { 73 &bt_link_group, 74 NULL 75 }; 76 77 static void bt_link_release(struct device *dev) 78 { 79 void *data = dev_get_drvdata(dev); 80 kfree(data); 81 } 82 83 static struct device_type bt_link = { 84 .name = "link", 85 .groups = bt_link_groups, 86 .release = bt_link_release, 87 }; 88 89 static void add_conn(struct work_struct *work) 90 { 91 struct hci_conn *conn = container_of(work, struct hci_conn, work_add); 92 struct hci_dev *hdev = conn->hdev; 93 94 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 95 96 dev_set_drvdata(&conn->dev, conn); 97 98 if (device_add(&conn->dev) < 0) { 99 BT_ERR("Failed to register connection device"); 100 return; 101 } 102 103 hci_dev_hold(hdev); 104 } 105 106 /* 107 * The rfcomm tty device will possibly retain even when conn 108 * is down, and sysfs doesn't support move zombie device, 109 * so we should move the device before conn device is destroyed. 110 */ 111 static int __match_tty(struct device *dev, void *data) 112 { 113 return !strncmp(dev_name(dev), "rfcomm", 6); 114 } 115 116 static void del_conn(struct work_struct *work) 117 { 118 struct hci_conn *conn = container_of(work, struct hci_conn, work_del); 119 struct hci_dev *hdev = conn->hdev; 120 121 if (!device_is_registered(&conn->dev)) 122 return; 123 124 while (1) { 125 struct device *dev; 126 127 dev = device_find_child(&conn->dev, NULL, __match_tty); 128 if (!dev) 129 break; 130 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 131 put_device(dev); 132 } 133 134 device_del(&conn->dev); 135 put_device(&conn->dev); 136 137 hci_dev_put(hdev); 138 } 139 140 void hci_conn_init_sysfs(struct hci_conn *conn) 141 { 142 struct hci_dev *hdev = conn->hdev; 143 144 BT_DBG("conn %p", conn); 145 146 conn->dev.type = &bt_link; 147 conn->dev.class = bt_class; 148 conn->dev.parent = &hdev->dev; 149 150 device_initialize(&conn->dev); 151 152 INIT_WORK(&conn->work_add, add_conn); 153 INIT_WORK(&conn->work_del, del_conn); 154 } 155 156 void hci_conn_add_sysfs(struct hci_conn *conn) 157 { 158 BT_DBG("conn %p", conn); 159 160 queue_work(conn->hdev->workqueue, &conn->work_add); 161 } 162 163 void hci_conn_del_sysfs(struct hci_conn *conn) 164 { 165 BT_DBG("conn %p", conn); 166 167 queue_work(conn->hdev->workqueue, &conn->work_del); 168 } 169 170 static inline char *host_bustostr(int bus) 171 { 172 switch (bus) { 173 case HCI_VIRTUAL: 174 return "VIRTUAL"; 175 case HCI_USB: 176 return "USB"; 177 case HCI_PCCARD: 178 return "PCCARD"; 179 case HCI_UART: 180 return "UART"; 181 case HCI_RS232: 182 return "RS232"; 183 case HCI_PCI: 184 return "PCI"; 185 case HCI_SDIO: 186 return "SDIO"; 187 default: 188 return "UNKNOWN"; 189 } 190 } 191 192 static inline char *host_typetostr(int type) 193 { 194 switch (type) { 195 case HCI_BREDR: 196 return "BR/EDR"; 197 case HCI_AMP: 198 return "AMP"; 199 default: 200 return "UNKNOWN"; 201 } 202 } 203 204 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) 205 { 206 struct hci_dev *hdev = dev_get_drvdata(dev); 207 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 208 } 209 210 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 211 { 212 struct hci_dev *hdev = dev_get_drvdata(dev); 213 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 214 } 215 216 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 217 { 218 struct hci_dev *hdev = dev_get_drvdata(dev); 219 char name[249]; 220 int i; 221 222 for (i = 0; i < 248; i++) 223 name[i] = hdev->dev_name[i]; 224 225 name[248] = '\0'; 226 return sprintf(buf, "%s\n", name); 227 } 228 229 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 230 { 231 struct hci_dev *hdev = dev_get_drvdata(dev); 232 return sprintf(buf, "0x%.2x%.2x%.2x\n", 233 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 234 } 235 236 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 237 { 238 struct hci_dev *hdev = dev_get_drvdata(dev); 239 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); 240 } 241 242 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 243 { 244 struct hci_dev *hdev = dev_get_drvdata(dev); 245 246 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 247 hdev->features[0], hdev->features[1], 248 hdev->features[2], hdev->features[3], 249 hdev->features[4], hdev->features[5], 250 hdev->features[6], hdev->features[7]); 251 } 252 253 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 254 { 255 struct hci_dev *hdev = dev_get_drvdata(dev); 256 return sprintf(buf, "%d\n", hdev->manufacturer); 257 } 258 259 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 260 { 261 struct hci_dev *hdev = dev_get_drvdata(dev); 262 return sprintf(buf, "%d\n", hdev->hci_ver); 263 } 264 265 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 266 { 267 struct hci_dev *hdev = dev_get_drvdata(dev); 268 return sprintf(buf, "%d\n", hdev->hci_rev); 269 } 270 271 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 272 { 273 struct hci_dev *hdev = dev_get_drvdata(dev); 274 return sprintf(buf, "%d\n", hdev->idle_timeout); 275 } 276 277 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 278 { 279 struct hci_dev *hdev = dev_get_drvdata(dev); 280 unsigned long val; 281 282 if (strict_strtoul(buf, 0, &val) < 0) 283 return -EINVAL; 284 285 if (val != 0 && (val < 500 || val > 3600000)) 286 return -EINVAL; 287 288 hdev->idle_timeout = val; 289 290 return count; 291 } 292 293 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 294 { 295 struct hci_dev *hdev = dev_get_drvdata(dev); 296 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 297 } 298 299 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 300 { 301 struct hci_dev *hdev = dev_get_drvdata(dev); 302 unsigned long val; 303 304 if (strict_strtoul(buf, 0, &val) < 0) 305 return -EINVAL; 306 307 if (val < 0x0002 || val > 0xFFFE || val % 2) 308 return -EINVAL; 309 310 if (val < hdev->sniff_min_interval) 311 return -EINVAL; 312 313 hdev->sniff_max_interval = val; 314 315 return count; 316 } 317 318 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 319 { 320 struct hci_dev *hdev = dev_get_drvdata(dev); 321 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 322 } 323 324 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 325 { 326 struct hci_dev *hdev = dev_get_drvdata(dev); 327 unsigned long val; 328 329 if (strict_strtoul(buf, 0, &val) < 0) 330 return -EINVAL; 331 332 if (val < 0x0002 || val > 0xFFFE || val % 2) 333 return -EINVAL; 334 335 if (val > hdev->sniff_max_interval) 336 return -EINVAL; 337 338 hdev->sniff_min_interval = val; 339 340 return count; 341 } 342 343 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 344 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 345 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 346 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 347 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 348 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 349 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 350 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 351 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 352 353 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 354 show_idle_timeout, store_idle_timeout); 355 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 356 show_sniff_max_interval, store_sniff_max_interval); 357 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 358 show_sniff_min_interval, store_sniff_min_interval); 359 360 static struct attribute *bt_host_attrs[] = { 361 &dev_attr_bus.attr, 362 &dev_attr_type.attr, 363 &dev_attr_name.attr, 364 &dev_attr_class.attr, 365 &dev_attr_address.attr, 366 &dev_attr_features.attr, 367 &dev_attr_manufacturer.attr, 368 &dev_attr_hci_version.attr, 369 &dev_attr_hci_revision.attr, 370 &dev_attr_idle_timeout.attr, 371 &dev_attr_sniff_max_interval.attr, 372 &dev_attr_sniff_min_interval.attr, 373 NULL 374 }; 375 376 static struct attribute_group bt_host_group = { 377 .attrs = bt_host_attrs, 378 }; 379 380 static const struct attribute_group *bt_host_groups[] = { 381 &bt_host_group, 382 NULL 383 }; 384 385 static void bt_host_release(struct device *dev) 386 { 387 void *data = dev_get_drvdata(dev); 388 kfree(data); 389 } 390 391 static struct device_type bt_host = { 392 .name = "host", 393 .groups = bt_host_groups, 394 .release = bt_host_release, 395 }; 396 397 static int inquiry_cache_show(struct seq_file *f, void *p) 398 { 399 struct hci_dev *hdev = f->private; 400 struct inquiry_cache *cache = &hdev->inq_cache; 401 struct inquiry_entry *e; 402 403 hci_dev_lock_bh(hdev); 404 405 for (e = cache->list; e; e = e->next) { 406 struct inquiry_data *data = &e->data; 407 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 408 batostr(&data->bdaddr), 409 data->pscan_rep_mode, data->pscan_period_mode, 410 data->pscan_mode, data->dev_class[2], 411 data->dev_class[1], data->dev_class[0], 412 __le16_to_cpu(data->clock_offset), 413 data->rssi, data->ssp_mode, e->timestamp); 414 } 415 416 hci_dev_unlock_bh(hdev); 417 418 return 0; 419 } 420 421 static int inquiry_cache_open(struct inode *inode, struct file *file) 422 { 423 return single_open(file, inquiry_cache_show, inode->i_private); 424 } 425 426 static const struct file_operations inquiry_cache_fops = { 427 .open = inquiry_cache_open, 428 .read = seq_read, 429 .llseek = seq_lseek, 430 .release = single_release, 431 }; 432 433 static int blacklist_show(struct seq_file *f, void *p) 434 { 435 struct hci_dev *hdev = f->private; 436 struct list_head *l; 437 438 hci_dev_lock_bh(hdev); 439 440 list_for_each(l, &hdev->blacklist) { 441 struct bdaddr_list *b; 442 443 b = list_entry(l, struct bdaddr_list, list); 444 445 seq_printf(f, "%s\n", batostr(&b->bdaddr)); 446 } 447 448 hci_dev_unlock_bh(hdev); 449 450 return 0; 451 } 452 453 static int blacklist_open(struct inode *inode, struct file *file) 454 { 455 return single_open(file, blacklist_show, inode->i_private); 456 } 457 458 static const struct file_operations blacklist_fops = { 459 .open = blacklist_open, 460 .read = seq_read, 461 .llseek = seq_lseek, 462 .release = single_release, 463 }; 464 int hci_register_sysfs(struct hci_dev *hdev) 465 { 466 struct device *dev = &hdev->dev; 467 int err; 468 469 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 470 471 dev->type = &bt_host; 472 dev->class = bt_class; 473 dev->parent = hdev->parent; 474 475 dev_set_name(dev, "%s", hdev->name); 476 477 dev_set_drvdata(dev, hdev); 478 479 err = device_register(dev); 480 if (err < 0) 481 return err; 482 483 if (!bt_debugfs) 484 return 0; 485 486 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 487 if (!hdev->debugfs) 488 return 0; 489 490 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 491 hdev, &inquiry_cache_fops); 492 493 debugfs_create_file("blacklist", 0444, hdev->debugfs, 494 hdev, &blacklist_fops); 495 496 return 0; 497 } 498 499 void hci_unregister_sysfs(struct hci_dev *hdev) 500 { 501 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 502 503 debugfs_remove_recursive(hdev->debugfs); 504 505 device_del(&hdev->dev); 506 } 507 508 int __init bt_sysfs_init(void) 509 { 510 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 511 512 bt_class = class_create(THIS_MODULE, "bluetooth"); 513 if (IS_ERR(bt_class)) 514 return PTR_ERR(bt_class); 515 516 return 0; 517 } 518 519 void bt_sysfs_cleanup(void) 520 { 521 class_destroy(bt_class); 522 523 debugfs_remove_recursive(bt_debugfs); 524 } 525