hci_sysfs.c revision 384943ec1bb462e410390ad8f108ff1474cd882d
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 9struct class *bt_class = NULL; 10EXPORT_SYMBOL_GPL(bt_class); 11 12static struct workqueue_struct *bt_workq; 13 14static 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 28static 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 34static 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 42static 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) \ 54struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) 55 56static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 57static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 58static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 59 60static struct attribute *bt_link_attrs[] = { 61 &link_attr_type.attr, 62 &link_attr_address.attr, 63 &link_attr_features.attr, 64 NULL 65}; 66 67static struct attribute_group bt_link_group = { 68 .attrs = bt_link_attrs, 69}; 70 71static struct attribute_group *bt_link_groups[] = { 72 &bt_link_group, 73 NULL 74}; 75 76static void bt_link_release(struct device *dev) 77{ 78 void *data = dev_get_drvdata(dev); 79 kfree(data); 80} 81 82static struct device_type bt_link = { 83 .name = "link", 84 .groups = bt_link_groups, 85 .release = bt_link_release, 86}; 87 88static 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 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 */ 111static int __match_tty(struct device *dev, void *data) 112{ 113 return !strncmp(dev_name(dev), "rfcomm", 6); 114} 115 116static 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 /* ensure previous add is complete */ 122 flush_work(&conn->work_add); 123 124 if (!device_is_registered(&conn->dev)) 125 return; 126 127 while (1) { 128 struct device *dev; 129 130 dev = device_find_child(&conn->dev, NULL, __match_tty); 131 if (!dev) 132 break; 133 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 134 put_device(dev); 135 } 136 137 device_del(&conn->dev); 138 put_device(&conn->dev); 139 140 hci_dev_put(hdev); 141} 142 143void hci_conn_init_sysfs(struct hci_conn *conn) 144{ 145 struct hci_dev *hdev = conn->hdev; 146 147 BT_DBG("conn %p", conn); 148 149 conn->dev.type = &bt_link; 150 conn->dev.class = bt_class; 151 conn->dev.parent = &hdev->dev; 152 153 dev_set_drvdata(&conn->dev, conn); 154 155 device_initialize(&conn->dev); 156 157 INIT_WORK(&conn->work_add, add_conn); 158 INIT_WORK(&conn->work_del, del_conn); 159} 160 161void hci_conn_add_sysfs(struct hci_conn *conn) 162{ 163 BT_DBG("conn %p", conn); 164 165 queue_work(bt_workq, &conn->work_add); 166} 167 168void hci_conn_del_sysfs(struct hci_conn *conn) 169{ 170 BT_DBG("conn %p", conn); 171 172 queue_work(bt_workq, &conn->work_del); 173} 174 175static inline char *host_typetostr(int type) 176{ 177 switch (type) { 178 case HCI_VIRTUAL: 179 return "VIRTUAL"; 180 case HCI_USB: 181 return "USB"; 182 case HCI_PCCARD: 183 return "PCCARD"; 184 case HCI_UART: 185 return "UART"; 186 case HCI_RS232: 187 return "RS232"; 188 case HCI_PCI: 189 return "PCI"; 190 case HCI_SDIO: 191 return "SDIO"; 192 default: 193 return "UNKNOWN"; 194 } 195} 196 197static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 198{ 199 struct hci_dev *hdev = dev_get_drvdata(dev); 200 return sprintf(buf, "%s\n", host_typetostr(hdev->type)); 201} 202 203static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 204{ 205 struct hci_dev *hdev = dev_get_drvdata(dev); 206 char name[249]; 207 int i; 208 209 for (i = 0; i < 248; i++) 210 name[i] = hdev->dev_name[i]; 211 212 name[248] = '\0'; 213 return sprintf(buf, "%s\n", name); 214} 215 216static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 217{ 218 struct hci_dev *hdev = dev_get_drvdata(dev); 219 return sprintf(buf, "0x%.2x%.2x%.2x\n", 220 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 221} 222 223static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 224{ 225 struct hci_dev *hdev = dev_get_drvdata(dev); 226 bdaddr_t bdaddr; 227 baswap(&bdaddr, &hdev->bdaddr); 228 return sprintf(buf, "%s\n", batostr(&bdaddr)); 229} 230 231static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 232{ 233 struct hci_dev *hdev = dev_get_drvdata(dev); 234 235 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 236 hdev->features[0], hdev->features[1], 237 hdev->features[2], hdev->features[3], 238 hdev->features[4], hdev->features[5], 239 hdev->features[6], hdev->features[7]); 240} 241 242static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 243{ 244 struct hci_dev *hdev = dev_get_drvdata(dev); 245 return sprintf(buf, "%d\n", hdev->manufacturer); 246} 247 248static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 249{ 250 struct hci_dev *hdev = dev_get_drvdata(dev); 251 return sprintf(buf, "%d\n", hdev->hci_ver); 252} 253 254static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 255{ 256 struct hci_dev *hdev = dev_get_drvdata(dev); 257 return sprintf(buf, "%d\n", hdev->hci_rev); 258} 259 260static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf) 261{ 262 struct hci_dev *hdev = dev_get_drvdata(dev); 263 struct inquiry_cache *cache = &hdev->inq_cache; 264 struct inquiry_entry *e; 265 int n = 0; 266 267 hci_dev_lock_bh(hdev); 268 269 for (e = cache->list; e; e = e->next) { 270 struct inquiry_data *data = &e->data; 271 bdaddr_t bdaddr; 272 baswap(&bdaddr, &data->bdaddr); 273 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 274 batostr(&bdaddr), 275 data->pscan_rep_mode, data->pscan_period_mode, 276 data->pscan_mode, data->dev_class[2], 277 data->dev_class[1], data->dev_class[0], 278 __le16_to_cpu(data->clock_offset), 279 data->rssi, data->ssp_mode, e->timestamp); 280 } 281 282 hci_dev_unlock_bh(hdev); 283 return n; 284} 285 286static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 287{ 288 struct hci_dev *hdev = dev_get_drvdata(dev); 289 return sprintf(buf, "%d\n", hdev->idle_timeout); 290} 291 292static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 293{ 294 struct hci_dev *hdev = dev_get_drvdata(dev); 295 char *ptr; 296 __u32 val; 297 298 val = simple_strtoul(buf, &ptr, 10); 299 if (ptr == buf) 300 return -EINVAL; 301 302 if (val != 0 && (val < 500 || val > 3600000)) 303 return -EINVAL; 304 305 hdev->idle_timeout = val; 306 307 return count; 308} 309 310static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 311{ 312 struct hci_dev *hdev = dev_get_drvdata(dev); 313 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 314} 315 316static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 317{ 318 struct hci_dev *hdev = dev_get_drvdata(dev); 319 char *ptr; 320 __u16 val; 321 322 val = simple_strtoul(buf, &ptr, 10); 323 if (ptr == buf) 324 return -EINVAL; 325 326 if (val < 0x0002 || val > 0xFFFE || val % 2) 327 return -EINVAL; 328 329 if (val < hdev->sniff_min_interval) 330 return -EINVAL; 331 332 hdev->sniff_max_interval = val; 333 334 return count; 335} 336 337static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 338{ 339 struct hci_dev *hdev = dev_get_drvdata(dev); 340 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 341} 342 343static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 344{ 345 struct hci_dev *hdev = dev_get_drvdata(dev); 346 char *ptr; 347 __u16 val; 348 349 val = simple_strtoul(buf, &ptr, 10); 350 if (ptr == buf) 351 return -EINVAL; 352 353 if (val < 0x0002 || val > 0xFFFE || val % 2) 354 return -EINVAL; 355 356 if (val > hdev->sniff_max_interval) 357 return -EINVAL; 358 359 hdev->sniff_min_interval = val; 360 361 return count; 362} 363 364static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 365static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 366static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 367static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 368static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 369static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 370static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 371static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 372static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL); 373 374static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 375 show_idle_timeout, store_idle_timeout); 376static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 377 show_sniff_max_interval, store_sniff_max_interval); 378static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 379 show_sniff_min_interval, store_sniff_min_interval); 380 381static struct attribute *bt_host_attrs[] = { 382 &dev_attr_type.attr, 383 &dev_attr_name.attr, 384 &dev_attr_class.attr, 385 &dev_attr_address.attr, 386 &dev_attr_features.attr, 387 &dev_attr_manufacturer.attr, 388 &dev_attr_hci_version.attr, 389 &dev_attr_hci_revision.attr, 390 &dev_attr_inquiry_cache.attr, 391 &dev_attr_idle_timeout.attr, 392 &dev_attr_sniff_max_interval.attr, 393 &dev_attr_sniff_min_interval.attr, 394 NULL 395}; 396 397static struct attribute_group bt_host_group = { 398 .attrs = bt_host_attrs, 399}; 400 401static struct attribute_group *bt_host_groups[] = { 402 &bt_host_group, 403 NULL 404}; 405 406static void bt_host_release(struct device *dev) 407{ 408 void *data = dev_get_drvdata(dev); 409 kfree(data); 410} 411 412static struct device_type bt_host = { 413 .name = "host", 414 .groups = bt_host_groups, 415 .release = bt_host_release, 416}; 417 418int hci_register_sysfs(struct hci_dev *hdev) 419{ 420 struct device *dev = &hdev->dev; 421 int err; 422 423 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); 424 425 dev->type = &bt_host; 426 dev->class = bt_class; 427 dev->parent = hdev->parent; 428 429 dev_set_name(dev, "%s", hdev->name); 430 431 dev_set_drvdata(dev, hdev); 432 433 err = device_register(dev); 434 if (err < 0) 435 return err; 436 437 return 0; 438} 439 440void hci_unregister_sysfs(struct hci_dev *hdev) 441{ 442 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); 443 444 device_del(&hdev->dev); 445} 446 447int __init bt_sysfs_init(void) 448{ 449 bt_workq = create_singlethread_workqueue("bluetooth"); 450 if (!bt_workq) 451 return -ENOMEM; 452 453 bt_class = class_create(THIS_MODULE, "bluetooth"); 454 if (IS_ERR(bt_class)) { 455 destroy_workqueue(bt_workq); 456 return PTR_ERR(bt_class); 457 } 458 459 return 0; 460} 461 462void bt_sysfs_cleanup(void) 463{ 464 destroy_workqueue(bt_workq); 465 466 class_destroy(bt_class); 467} 468