1 /* 2 * Copyright 2008, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Oliver Ruiz Dorantes, oliver.ruiz.dorantes_at_gmail.com 7 */ 8 9 #include <new> 10 #include <errno.h> 11 #include <stdlib.h> 12 #include <string.h> 13 14 #include <KernelExport.h> 15 #include <lock.h> 16 #include <SupportDefs.h> 17 #include <util/AutoLock.h> 18 #include <util/DoublyLinkedList.h> 19 20 #include <net_buffer.h> 21 #include <net_device.h> 22 #include <net_stack.h> 23 #include <NetBufferUtilities.h> 24 25 #define BT_DEBUG_THIS_MODULE 26 #define SUBMODULE_NAME "hci" 27 #define SUBMODULE_COLOR 34 28 #include <btDebug.h> 29 #include <btCoreData.h> 30 #include <btModules.h> 31 #include <CodeHandler.h> 32 #define KERNEL_LAND 33 #include <PortListener.h> 34 #undef KERNEL_LAND 35 36 #include <bluetooth/HCI/btHCI.h> 37 #include <bluetooth/HCI/btHCI_acl.h> 38 #include <bluetooth/HCI/btHCI_command.h> 39 #include <bluetooth/HCI/btHCI_event.h> 40 #include <bluetooth/HCI/btHCI_transport.h> 41 #include <bluetooth/HCI/btHCI_sco.h> 42 #include <bluetooth/bdaddrUtils.h> 43 44 #include "acl.h" 45 46 47 typedef PortListener<void, 48 HCI_MAX_FRAME_SIZE, // Event Body can hold max 255 + 2 header 49 24 // Some devices have sent chunks of 24 events(inquiry result) 50 > BluetoothRawDataPort; 51 52 53 // Modules references 54 net_buffer_module_info* gBufferModule = NULL; 55 struct bluetooth_core_data_module_info* btCoreData = NULL; 56 57 static mutex sListLock; 58 static sem_id sLinkChangeSemaphore; 59 static DoublyLinkedList<bluetooth_device> sDeviceList; 60 61 BluetoothRawDataPort* BluetoothRXPort; 62 63 // forward declarations 64 status_t HciPacketHandler(void* data, int32 code, size_t size); 65 66 67 bluetooth_device* 68 FindDeviceByID(hci_id hid) 69 { 70 bluetooth_device* device; 71 72 DoublyLinkedList<bluetooth_device>::Iterator iterator 73 = sDeviceList.GetIterator(); 74 75 while (iterator.HasNext()) { 76 device = iterator.Next(); 77 if (device->index == hid) 78 return device; 79 } 80 81 return NULL; 82 } 83 84 85 status_t 86 PostTransportPacket(hci_id hid, bt_packet_t type, void* data, size_t count) 87 { 88 uint32 code = 0; 89 90 Bluetooth::CodeHandler::SetDevice(&code, hid); 91 Bluetooth::CodeHandler::SetProtocol(&code, type); 92 93 return BluetoothRXPort->Trigger(code, data, count); 94 } 95 96 97 status_t 98 Assemble(bluetooth_device* bluetoothDevice, bt_packet_t type, void* data, 99 size_t count) 100 { 101 net_buffer* nbuf = bluetoothDevice->fBuffersRx[type]; 102 103 size_t currentPacketLen = 0; 104 105 while (count) { 106 107 if (nbuf == NULL) { 108 // new buffer incoming 109 switch (type) { 110 case BT_EVENT: 111 if (count >= HCI_EVENT_HDR_SIZE) { 112 struct hci_event_header* headerPacket 113 = (struct hci_event_header*)data; 114 bluetoothDevice->fExpectedPacketSize[type] 115 = HCI_EVENT_HDR_SIZE + headerPacket->elen; 116 117 if (count >= bluetoothDevice->fExpectedPacketSize[type]) { 118 // the whole packet is here so it can be already posted. 119 flowf("EVENT posted in HCI!!!\n"); 120 btCoreData->PostEvent(bluetoothDevice, data, 121 bluetoothDevice->fExpectedPacketSize[type]); 122 123 } else { 124 nbuf = gBufferModule->create( 125 bluetoothDevice->fExpectedPacketSize[type]); 126 bluetoothDevice->fBuffersRx[type] = nbuf; 127 128 nbuf->protocol = type; 129 } 130 131 } else { 132 panic("EVENT frame corrupted\n"); 133 return EILSEQ; 134 } 135 break; 136 137 case BT_ACL: 138 if (count >= HCI_ACL_HDR_SIZE) { 139 struct hci_acl_header* headerPkt = (struct hci_acl_header*)data; 140 141 bluetoothDevice->fExpectedPacketSize[type] = HCI_ACL_HDR_SIZE 142 + B_LENDIAN_TO_HOST_INT16(headerPkt->alen); 143 144 // Create the buffer -> TODO: this allocation can fail 145 nbuf = gBufferModule->create( 146 bluetoothDevice->fExpectedPacketSize[type]); 147 bluetoothDevice->fBuffersRx[type] = nbuf; 148 149 nbuf->protocol = type; 150 } else { 151 panic("ACL frame corrupted\n"); 152 return EILSEQ; 153 } 154 break; 155 156 case BT_SCO: 157 158 break; 159 160 default: 161 panic("unknown packet type in assembly"); 162 break; 163 } 164 165 currentPacketLen = bluetoothDevice->fExpectedPacketSize[type]; 166 167 } else { 168 // Continuation of a packet 169 currentPacketLen = bluetoothDevice->fExpectedPacketSize[type] - nbuf->size; 170 } 171 if (nbuf != NULL) { 172 currentPacketLen = min_c(currentPacketLen, count); 173 174 gBufferModule->append(nbuf, data, currentPacketLen); 175 176 if ((bluetoothDevice->fExpectedPacketSize[type] - nbuf->size) == 0) { 177 178 switch (nbuf->protocol) { 179 case BT_EVENT: 180 panic("need to send full buffer to btdatacore!\n"); 181 btCoreData->PostEvent(bluetoothDevice, data, 182 bluetoothDevice->fExpectedPacketSize[type]); 183 184 break; 185 case BT_ACL: 186 // TODO: device descriptor has been fetched better not 187 // pass id again 188 flowf("ACL parsed in ACL!\n"); 189 AclAssembly(nbuf, bluetoothDevice->index); 190 break; 191 default: 192 193 break; 194 } 195 196 bluetoothDevice->fBuffersRx[type] = nbuf = NULL; 197 bluetoothDevice->fExpectedPacketSize[type] = 0; 198 } else { 199 #if DEBUG_ACL 200 if (type == BT_ACL) { 201 debugf("ACL Packet not filled size=%" B_PRIuSIZE 202 " expected=%" B_PRIuSIZE "\n", nbuf->size, 203 bluetoothDevice->fExpectedPacketSize[type]); 204 } 205 #endif 206 } 207 208 } 209 // in case in the pipe there is info about the next buffer 210 count -= currentPacketLen; 211 data = (void*)((uint8*)data + currentPacketLen); 212 } 213 214 return B_OK; 215 } 216 217 218 status_t 219 HciPacketHandler(void* data, int32 code, size_t size) 220 { 221 hci_id deviceId = Bluetooth::CodeHandler::Device(code); 222 223 bluetooth_device* bluetoothDevice = FindDeviceByID(deviceId); 224 225 debugf("to assemble %" B_PRIuSIZE " bytes of 0x%" B_PRIx32 "\n", size, 226 deviceId); 227 228 if (bluetoothDevice != NULL) 229 return Assemble(bluetoothDevice, Bluetooth::CodeHandler::Protocol(code), 230 data, size); 231 else { 232 debugf("Device 0x%" B_PRIx32 " could not be matched\n", deviceId); 233 } 234 235 return B_ERROR; 236 } 237 238 239 // #pragma mark - 240 241 242 status_t 243 RegisterDriver(bt_hci_transport_hooks* hooks, bluetooth_device** _device) 244 { 245 246 bluetooth_device* device = new (std::nothrow) bluetooth_device; 247 if (device == NULL) 248 return B_NO_MEMORY; 249 250 for (int index = 0; index < HCI_NUM_PACKET_TYPES; index++) { 251 device->fBuffersRx[index] = NULL; 252 device->fExpectedPacketSize[index] = 0; 253 } 254 255 device->info = NULL; // not yet used 256 device->hooks = hooks; 257 device->supportedPacketTypes = (HCI_DM1 | HCI_DH1 | HCI_HV1); 258 device->linkMode = (HCI_LM_ACCEPT); 259 device->mtu = L2CAP_MTU_MINIMUM; // TODO: ensure specs min value 260 261 MutexLocker _(&sListLock); 262 263 if (sDeviceList.IsEmpty()) 264 device->index = HCI_DEVICE_INDEX_OFFSET; // REVIEW: dev index 265 else { 266 device->index = (sDeviceList.Tail())->index + 1; // REVIEW! 267 flowf("List not empty\n"); 268 } 269 270 sDeviceList.Add(device); 271 272 debugf("Device %" B_PRIx32 "\n", device->index); 273 274 *_device = device; 275 276 return B_OK; 277 } 278 279 280 status_t 281 UnregisterDriver(hci_id id) 282 { 283 bluetooth_device* device = FindDeviceByID(id); 284 285 if (device == NULL) 286 return B_ERROR; 287 288 if (device->GetDoublyLinkedListLink()->next != NULL 289 || device->GetDoublyLinkedListLink()->previous != NULL 290 || device == sDeviceList.Head()) 291 sDeviceList.Remove(device); 292 293 delete device; 294 295 return B_OK; 296 } 297 298 299 // PostACL 300 status_t 301 PostACL(hci_id hciId, net_buffer* buffer) 302 { 303 net_buffer* curr_frame = NULL; 304 net_buffer* next_frame = buffer; 305 uint8 flag = HCI_ACL_PACKET_START; 306 307 if (buffer == NULL) 308 panic("passing null buffer"); 309 310 uint16 handle = buffer->type; // TODO: CodeHandler 311 312 bluetooth_device* device = FindDeviceByID(hciId); 313 314 if (device == NULL) { 315 debugf("No device 0x%" B_PRIx32 "\n", hciId); 316 return B_ERROR; 317 } 318 319 debugf("index 0x%" B_PRIx32 " try to send bt packet of %" B_PRIu32 320 " bytes (flags 0x%" B_PRIx32 "):\n", device->index, buffer->size, 321 buffer->flags); 322 323 // TODO: ATOMIC! any other thread should stop here 324 do { 325 // Divide packet if big enough 326 curr_frame = next_frame; 327 328 if (curr_frame->size > device->mtu) { 329 next_frame = gBufferModule->split(curr_frame, device->mtu); 330 } else { 331 next_frame = NULL; 332 } 333 334 // Attach acl header 335 { 336 NetBufferPrepend<struct hci_acl_header> bufferHeader(curr_frame); 337 status_t status = bufferHeader.Status(); 338 if (status < B_OK) { 339 // free the buffer 340 continue; 341 } 342 343 bufferHeader->handle = pack_acl_handle_flags(handle, flag, 0); 344 bufferHeader->alen = curr_frame->size - sizeof(struct hci_acl_header); 345 } 346 347 // Send to driver 348 curr_frame->protocol = BT_ACL; 349 350 debugf("Tolower nbuf %p!\n", curr_frame); 351 // We could pass a cookie and avoid the driver fetch the Id 352 device->hooks->SendACL(device->index, curr_frame); 353 flag = HCI_ACL_PACKET_FRAGMENT; 354 355 } while (next_frame != NULL); 356 357 return B_OK; 358 } 359 360 361 status_t 362 PostSCO(hci_id hciId, net_buffer* buffer) 363 { 364 return B_ERROR; 365 } 366 367 368 status_t 369 PostESCO(hci_id hciId, net_buffer* buffer) 370 { 371 return B_ERROR; 372 } 373 374 375 static int 376 dump_bluetooth_devices(int argc, char** argv) 377 { 378 bluetooth_device* device; 379 380 DoublyLinkedList<bluetooth_device>::Iterator iterator 381 = sDeviceList.GetIterator(); 382 383 while (iterator.HasNext()) { 384 device = iterator.Next(); 385 kprintf("\tindex=%" B_PRIx32 " @%p hooks=%p\n", device->index, 386 device, device->hooks); 387 } 388 389 return 0; 390 } 391 392 393 static status_t 394 bluetooth_std_ops(int32 op, ...) 395 { 396 397 flowf("\n"); 398 399 switch (op) { 400 case B_MODULE_INIT: 401 { 402 status_t status; 403 404 status = get_module(NET_BUFFER_MODULE_NAME, 405 (module_info**)&gBufferModule); 406 407 if (status < B_OK) { 408 panic("no way Dude we need that!"); 409 return status; 410 } 411 412 status = get_module(BT_CORE_DATA_MODULE_NAME,(module_info**)&btCoreData); 413 if (status < B_OK) { 414 flowf("problem getting datacore\n"); 415 return status; 416 } 417 418 new (&sDeviceList) DoublyLinkedList<bluetooth_device>; 419 // static C++ objects are not initialized in the module startup 420 421 BluetoothRXPort = new BluetoothRawDataPort(BT_RX_PORT_NAME, 422 (BluetoothRawDataPort::port_listener_func)&HciPacketHandler); 423 424 if (BluetoothRXPort->Launch() != B_OK) { 425 flowf("RX thread creation failed!\n"); 426 // we Cannot do much here ... avoid registering 427 } else { 428 flowf("RX thread launched!\n"); 429 } 430 431 sLinkChangeSemaphore = create_sem(0, "bt sem"); 432 if (sLinkChangeSemaphore < B_OK) { 433 put_module(NET_STACK_MODULE_NAME); 434 flowf("sem failed\n"); 435 return sLinkChangeSemaphore; 436 } 437 438 mutex_init(&sListLock, "bluetooth devices"); 439 440 // status = InitializeAclConnectionThread(); 441 debugf("%s: Connection Thread error\n", __func__); 442 443 add_debugger_command("btLocalDevices", &dump_bluetooth_devices, 444 "Lists Bluetooth LocalDevices registered in the Stack"); 445 446 return B_OK; 447 } 448 449 case B_MODULE_UNINIT: 450 { 451 delete_sem(sLinkChangeSemaphore); 452 453 mutex_destroy(&sListLock); 454 put_module(NET_BUFFER_MODULE_NAME); 455 put_module(NET_STACK_MODULE_NAME); 456 put_module(BT_CORE_DATA_MODULE_NAME); 457 remove_debugger_command("btLocalDevices", &dump_bluetooth_devices); 458 // status_t status = QuitAclConnectionThread(); 459 460 return B_OK; 461 } 462 463 default: 464 return B_ERROR; 465 } 466 } 467 468 469 bt_hci_module_info sBluetoothModule = { 470 { 471 BT_HCI_MODULE_NAME, 472 B_KEEP_LOADED, 473 bluetooth_std_ops 474 }, 475 RegisterDriver, 476 UnregisterDriver, 477 FindDeviceByID, 478 PostTransportPacket, 479 PostACL, 480 PostSCO, 481 PostESCO 482 }; 483 484 485 module_info* modules[] = { 486 (module_info*)&sBluetoothModule, 487 NULL 488 }; 489 490