1 /* Bluetooth HCI driver model support. */ 2 3 #include <linux/kernel.h> 4 #include <linux/init.h> 5 6 #include <net/bluetooth/bluetooth.h> 7 #include <net/bluetooth/hci_core.h> 8 9 struct class *bt_class = NULL; 10 EXPORT_SYMBOL_GPL(bt_class); 11 12 static struct workqueue_struct *bt_workq; 13 14 static inline char *link_typetostr(int type) 15 { 16 switch (type) { 17 case ACL_LINK: 18 return "ACL"; 19 case SCO_LINK: 20 return "SCO"; 21 case ESCO_LINK: 22 return "eSCO"; 23 default: 24 return "UNKNOWN"; 25 } 26 } 27 28 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) 29 { 30 struct hci_conn *conn = dev_get_drvdata(dev); 31 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 32 } 33 34 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) 35 { 36 struct hci_conn *conn = dev_get_drvdata(dev); 37 bdaddr_t bdaddr; 38 baswap(&bdaddr, &conn->dst); 39 return sprintf(buf, "%s\n", batostr(&bdaddr)); 40 } 41 42 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) 43 { 44 struct hci_conn *conn = dev_get_drvdata(dev); 45 46 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 47 conn->features[0], conn->features[1], 48 conn->features[2], conn->features[3], 49 conn->features[4], conn->features[5], 50 conn->features[6], conn->features[7]); 51 } 52 53 #define LINK_ATTR(_name,_mode,_show,_store) \ 54 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) 55 56 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 57 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 58 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 59 60 static struct attribute *bt_link_attrs[] = { 61 &link_attr_type.attr, 62 &link_attr_address.attr, 63 &link_attr_features.attr, 64 NULL 65 }; 66 67 static struct attribute_group bt_link_group = { 68 .attrs = bt_link_attrs, 69 }; 70 71 static struct attribute_group *bt_link_groups[] = { 72 &bt_link_group, 73 NULL 74 }; 75 76 static void bt_link_release(struct device *dev) 77 { 78 void *data = dev_get_drvdata(dev); 79 kfree(data); 80 } 81 82 static struct device_type bt_link = { 83 .name = "link", 84 .groups = bt_link_groups, 85 .release = bt_link_release, 86 }; 87 88 static void add_conn(struct work_struct *work) 89 { 90 struct hci_conn *conn = container_of(work, struct hci_conn, work_add); 91 struct hci_dev *hdev = conn->hdev; 92 93 /* ensure previous del is complete */ 94 flush_work(&conn->work_del); 95 96 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 97 98 if (device_add(&conn->dev) < 0) { 99 BT_ERR("Failed to register connection device"); 100 return; 101 } 102 } 103 104 /* 105 * The rfcomm tty device will possibly retain even when conn 106 * is down, and sysfs doesn't support move zombie device, 107 * so we should move the device before conn device is destroyed. 108 */ 109 static int __match_tty(struct device *dev, void *data) 110 { 111 return !strncmp(dev_name(dev), "rfcomm", 6); 112 } 113 114 static void del_conn(struct work_struct *work) 115 { 116 struct hci_conn *conn = container_of(work, struct hci_conn, work_del); 117 struct hci_dev *hdev = conn->hdev; 118 119 /* ensure previous add is complete */ 120 flush_work(&conn->work_add); 121 122 if (!device_is_registered(&conn->dev)) 123 return; 124 125 while (1) { 126 struct device *dev; 127 128 dev = device_find_child(&conn->dev, NULL, __match_tty); 129 if (!dev) 130 break; 131 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 132 put_device(dev); 133 } 134 135 device_del(&conn->dev); 136 put_device(&conn->dev); 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 dev_set_drvdata(&conn->dev, conn); 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(bt_workq, &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(bt_workq, &conn->work_del); 170 } 171 172 static inline char *host_typetostr(int type) 173 { 174 switch (type) { 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 ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 195 { 196 struct hci_dev *hdev = dev_get_drvdata(dev); 197 return sprintf(buf, "%s\n", host_typetostr(hdev->type)); 198 } 199 200 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 201 { 202 struct hci_dev *hdev = dev_get_drvdata(dev); 203 char name[249]; 204 int i; 205 206 for (i = 0; i < 248; i++) 207 name[i] = hdev->dev_name[i]; 208 209 name[248] = '\0'; 210 return sprintf(buf, "%s\n", name); 211 } 212 213 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 214 { 215 struct hci_dev *hdev = dev_get_drvdata(dev); 216 return sprintf(buf, "0x%.2x%.2x%.2x\n", 217 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 218 } 219 220 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 221 { 222 struct hci_dev *hdev = dev_get_drvdata(dev); 223 bdaddr_t bdaddr; 224 baswap(&bdaddr, &hdev->bdaddr); 225 return sprintf(buf, "%s\n", batostr(&bdaddr)); 226 } 227 228 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 229 { 230 struct hci_dev *hdev = dev_get_drvdata(dev); 231 232 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 233 hdev->features[0], hdev->features[1], 234 hdev->features[2], hdev->features[3], 235 hdev->features[4], hdev->features[5], 236 hdev->features[6], hdev->features[7]); 237 } 238 239 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 240 { 241 struct hci_dev *hdev = dev_get_drvdata(dev); 242 return sprintf(buf, "%d\n", hdev->manufacturer); 243 } 244 245 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 246 { 247 struct hci_dev *hdev = dev_get_drvdata(dev); 248 return sprintf(buf, "%d\n", hdev->hci_ver); 249 } 250 251 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 252 { 253 struct hci_dev *hdev = dev_get_drvdata(dev); 254 return sprintf(buf, "%d\n", hdev->hci_rev); 255 } 256 257 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf) 258 { 259 struct hci_dev *hdev = dev_get_drvdata(dev); 260 struct inquiry_cache *cache = &hdev->inq_cache; 261 struct inquiry_entry *e; 262 int n = 0; 263 264 hci_dev_lock_bh(hdev); 265 266 for (e = cache->list; e; e = e->next) { 267 struct inquiry_data *data = &e->data; 268 bdaddr_t bdaddr; 269 baswap(&bdaddr, &data->bdaddr); 270 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 271 batostr(&bdaddr), 272 data->pscan_rep_mode, data->pscan_period_mode, 273 data->pscan_mode, data->dev_class[2], 274 data->dev_class[1], data->dev_class[0], 275 __le16_to_cpu(data->clock_offset), 276 data->rssi, data->ssp_mode, e->timestamp); 277 } 278 279 hci_dev_unlock_bh(hdev); 280 return n; 281 } 282 283 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 284 { 285 struct hci_dev *hdev = dev_get_drvdata(dev); 286 return sprintf(buf, "%d\n", hdev->idle_timeout); 287 } 288 289 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 290 { 291 struct hci_dev *hdev = dev_get_drvdata(dev); 292 char *ptr; 293 __u32 val; 294 295 val = simple_strtoul(buf, &ptr, 10); 296 if (ptr == buf) 297 return -EINVAL; 298 299 if (val != 0 && (val < 500 || val > 3600000)) 300 return -EINVAL; 301 302 hdev->idle_timeout = val; 303 304 return count; 305 } 306 307 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 308 { 309 struct hci_dev *hdev = dev_get_drvdata(dev); 310 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 311 } 312 313 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 314 { 315 struct hci_dev *hdev = dev_get_drvdata(dev); 316 char *ptr; 317 __u16 val; 318 319 val = simple_strtoul(buf, &ptr, 10); 320 if (ptr == buf) 321 return -EINVAL; 322 323 if (val < 0x0002 || val > 0xFFFE || val % 2) 324 return -EINVAL; 325 326 if (val < hdev->sniff_min_interval) 327 return -EINVAL; 328 329 hdev->sniff_max_interval = val; 330 331 return count; 332 } 333 334 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 335 { 336 struct hci_dev *hdev = dev_get_drvdata(dev); 337 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 338 } 339 340 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 341 { 342 struct hci_dev *hdev = dev_get_drvdata(dev); 343 char *ptr; 344 __u16 val; 345 346 val = simple_strtoul(buf, &ptr, 10); 347 if (ptr == buf) 348 return -EINVAL; 349 350 if (val < 0x0002 || val > 0xFFFE || val % 2) 351 return -EINVAL; 352 353 if (val > hdev->sniff_max_interval) 354 return -EINVAL; 355 356 hdev->sniff_min_interval = val; 357 358 return count; 359 } 360 361 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 362 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 363 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 364 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 365 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 366 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 367 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 368 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 369 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL); 370 371 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 372 show_idle_timeout, store_idle_timeout); 373 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 374 show_sniff_max_interval, store_sniff_max_interval); 375 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 376 show_sniff_min_interval, store_sniff_min_interval); 377 378 static struct attribute *bt_host_attrs[] = { 379 &dev_attr_type.attr, 380 &dev_attr_name.attr, 381 &dev_attr_class.attr, 382 &dev_attr_address.attr, 383 &dev_attr_features.attr, 384 &dev_attr_manufacturer.attr, 385 &dev_attr_hci_version.attr, 386 &dev_attr_hci_revision.attr, 387 &dev_attr_inquiry_cache.attr, 388 &dev_attr_idle_timeout.attr, 389 &dev_attr_sniff_max_interval.attr, 390 &dev_attr_sniff_min_interval.attr, 391 NULL 392 }; 393 394 static struct attribute_group bt_host_group = { 395 .attrs = bt_host_attrs, 396 }; 397 398 static struct attribute_group *bt_host_groups[] = { 399 &bt_host_group, 400 NULL 401 }; 402 403 static void bt_host_release(struct device *dev) 404 { 405 void *data = dev_get_drvdata(dev); 406 kfree(data); 407 } 408 409 static struct device_type bt_host = { 410 .name = "host", 411 .groups = bt_host_groups, 412 .release = bt_host_release, 413 }; 414 415 int hci_register_sysfs(struct hci_dev *hdev) 416 { 417 struct device *dev = &hdev->dev; 418 int err; 419 420 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); 421 422 dev->type = &bt_host; 423 dev->class = bt_class; 424 dev->parent = hdev->parent; 425 426 dev_set_name(dev, "%s", hdev->name); 427 428 dev_set_drvdata(dev, hdev); 429 430 err = device_register(dev); 431 if (err < 0) 432 return err; 433 434 return 0; 435 } 436 437 void hci_unregister_sysfs(struct hci_dev *hdev) 438 { 439 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); 440 441 device_del(&hdev->dev); 442 } 443 444 int __init bt_sysfs_init(void) 445 { 446 bt_workq = create_singlethread_workqueue("bluetooth"); 447 if (!bt_workq) 448 return -ENOMEM; 449 450 bt_class = class_create(THIS_MODULE, "bluetooth"); 451 if (IS_ERR(bt_class)) { 452 destroy_workqueue(bt_workq); 453 return PTR_ERR(bt_class); 454 } 455 456 return 0; 457 } 458 459 void bt_sysfs_cleanup(void) 460 { 461 destroy_workqueue(bt_workq); 462 463 class_destroy(bt_class); 464 } 465