1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci_transport_h2_libusb.c" 39 40 /* 41 * hci_transport_usb.c 42 * 43 * HCI Transport API implementation for USB 44 * 45 * Created by Matthias Ringwald on 7/5/09. 46 */ 47 48 // Interface Number - Alternate Setting - suggested Endpoint Address - Endpoint Type - Suggested Max Packet Size 49 // HCI Commands 0 0 0x00 Control 8/16/32/64 50 // HCI Events 0 0 0x81 Interrupt (IN) 16 51 // ACL Data 0 0 0x82 Bulk (IN) 32/64 52 // ACL Data 0 0 0x02 Bulk (OUT) 32/64 53 // SCO Data 0 0 0x83 Isochronous (IN) 54 // SCO Data 0 0 0x03 Isochronous (Out) 55 56 #include <stdio.h> 57 #include <strings.h> 58 #include <string.h> 59 #include <unistd.h> /* UNIX standard function definitions */ 60 #include <sys/types.h> 61 62 #include <libusb.h> 63 64 #include "btstack_config.h" 65 66 #include "btstack_debug.h" 67 #include "hci.h" 68 #include "hci_transport.h" 69 70 // deal with changes in libusb API: 71 #ifdef LIBUSB_API_VERSION 72 #if LIBUSB_API_VERSION >= 0x01000106 73 // since 1.0.22, libusb_set_option replaces libusb_set_debug 74 #define libusb_set_debug(context,level) libusb_set_option(context, LIBUSB_OPTION_LOG_LEVEL, level) 75 #endif 76 #endif 77 78 #if (USB_VENDOR_ID != 0) && (USB_PRODUCT_ID != 0) 79 #define HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 80 #endif 81 82 #define ACL_IN_BUFFER_COUNT 3 83 #define EVENT_IN_BUFFER_COUNT 3 84 #define SCO_IN_BUFFER_COUNT 10 85 86 #define ASYNC_POLLING_INTERVAL_MS 1 87 88 // 89 // Bluetooth USB Transport Alternate Settings: 90 // 91 // 0: No active voice channels (for USB compliance) 92 // 1: One 8 kHz voice channel with 8-bit encoding 93 // 2: Two 8 kHz voice channels with 8-bit encoding or one 8 kHz voice channel with 16-bit encoding 94 // 3: Three 8 kHz voice channels with 8-bit encoding 95 // 4: Two 8 kHz voice channels with 16-bit encoding or one 16 kHz voice channel with 16-bit encoding 96 // 5: Three 8 kHz voice channels with 16-bit encoding or one 8 kHz voice channel with 16-bit encoding and one 16 kHz voice channel with 16-bit encoding 97 // --> support only a single SCO connection 98 // #define ALT_SETTING (1) 99 100 #ifdef ENABLE_SCO_OVER_HCI 101 // alt setting for 1-3 connections and 8/16 bit 102 static const int alt_setting_8_bit[] = {1,2,3}; 103 static const int alt_setting_16_bit[] = {2,4,5}; 104 105 // for ALT_SETTING >= 1 and 8-bit channel, we need the following isochronous packets 106 // One complete SCO packet with 24 frames every 3 frames (== 3 ms) 107 #define NUM_ISO_PACKETS (3) 108 109 static const uint16_t iso_packet_size_for_alt_setting[] = { 110 0, 111 9, 112 17, 113 25, 114 33, 115 49, 116 63, 117 }; 118 #endif 119 120 // 49 bytes is the max usb packet size for alternate setting 5 (Three 8 kHz 16-bit channels or one 8 kHz 16-bit channel and one 16 kHz 16-bit channel) 121 // note: alt setting 6 has max packet size of 63 every 7.5 ms = 472.5 bytes / HCI packet, while max SCO packet has 255 byte payload 122 #define SCO_PACKET_SIZE (49 * NUM_ISO_PACKETS) 123 124 // Outgoing SCO packet queue 125 // simplified ring buffer implementation 126 #define SCO_OUT_BUFFER_COUNT (8) 127 #define SCO_OUT_BUFFER_SIZE (SCO_OUT_BUFFER_COUNT * SCO_PACKET_SIZE) 128 129 // seems to be the max depth for USB 3 130 #define USB_MAX_PATH_LEN 7 131 132 // prototypes 133 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size); 134 static int usb_close(void); 135 136 typedef enum { 137 LIB_USB_CLOSED = 0, 138 LIB_USB_OPENED, 139 LIB_USB_DEVICE_OPENDED, 140 LIB_USB_INTERFACE_CLAIMED, 141 LIB_USB_TRANSFERS_ALLOCATED 142 } libusb_state_t; 143 144 // SCO packet state machine 145 typedef enum { 146 H2_W4_SCO_HEADER = 1, 147 H2_W4_PAYLOAD, 148 } H2_SCO_STATE; 149 150 static libusb_state_t libusb_state = LIB_USB_CLOSED; 151 152 // single instance 153 static hci_transport_t * hci_transport_usb = NULL; 154 155 static void (*packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size) = dummy_handler; 156 157 // libusb 158 #ifndef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 159 static struct libusb_device_descriptor desc; 160 static libusb_device * dev; 161 #endif 162 static libusb_device_handle * handle; 163 164 static struct libusb_transfer *command_out_transfer; 165 static struct libusb_transfer *acl_out_transfer; 166 static struct libusb_transfer *event_in_transfer[EVENT_IN_BUFFER_COUNT]; 167 static struct libusb_transfer *acl_in_transfer[ACL_IN_BUFFER_COUNT]; 168 169 #ifdef ENABLE_SCO_OVER_HCI 170 171 #ifdef _WIN32 172 #error "SCO not working on Win32 (Windows 8, libusb 1.0.19, Zadic WinUSB), please uncomment ENABLE_SCO_OVER_HCI in btstack-config.h for now" 173 #endif 174 175 // incoming SCO 176 static H2_SCO_STATE sco_state; 177 static uint8_t sco_buffer[255+3 + SCO_PACKET_SIZE]; 178 static uint16_t sco_read_pos; 179 static uint16_t sco_bytes_to_read; 180 static struct libusb_transfer *sco_in_transfer[SCO_IN_BUFFER_COUNT]; 181 static uint8_t hci_sco_in_buffer[SCO_IN_BUFFER_COUNT][SCO_PACKET_SIZE]; 182 183 // outgoing SCO 184 static uint8_t sco_out_ring_buffer[SCO_OUT_BUFFER_SIZE]; 185 static int sco_ring_write; // packet idx 186 static int sco_out_transfers_active; 187 static struct libusb_transfer *sco_out_transfers[SCO_OUT_BUFFER_COUNT]; 188 static int sco_out_transfers_in_flight[SCO_OUT_BUFFER_COUNT]; 189 190 // pause/resume 191 static uint16_t sco_voice_setting; 192 static int sco_num_connections; 193 static int sco_shutdown; 194 195 // dynamic SCO configuration 196 static uint16_t iso_packet_size; 197 198 #endif 199 200 // outgoing buffer for HCI Command packets 201 static uint8_t hci_cmd_buffer[3 + 256 + LIBUSB_CONTROL_SETUP_SIZE]; 202 203 // incoming buffer for HCI Events and ACL Packets 204 static uint8_t hci_event_in_buffer[EVENT_IN_BUFFER_COUNT][HCI_ACL_BUFFER_SIZE]; // bigger than largest packet 205 static uint8_t hci_acl_in_buffer[ACL_IN_BUFFER_COUNT][HCI_INCOMING_PRE_BUFFER_SIZE + HCI_ACL_BUFFER_SIZE]; 206 207 // For (ab)use as a linked list of received packets 208 static struct libusb_transfer *handle_packet; 209 210 static int doing_pollfds; 211 static int num_pollfds; 212 static btstack_data_source_t * pollfd_data_sources; 213 static btstack_timer_source_t usb_timer; 214 static int usb_timer_active; 215 216 static int usb_acl_out_active = 0; 217 static int usb_command_active = 0; 218 219 // endpoint addresses 220 static int event_in_addr; 221 static int acl_in_addr; 222 static int acl_out_addr; 223 static int sco_in_addr; 224 static int sco_out_addr; 225 226 // device path 227 static int usb_path_len; 228 static uint8_t usb_path[USB_MAX_PATH_LEN]; 229 230 231 #ifdef ENABLE_SCO_OVER_HCI 232 static void sco_ring_init(void){ 233 sco_ring_write = 0; 234 sco_out_transfers_active = 0; 235 } 236 static int sco_ring_have_space(void){ 237 return sco_out_transfers_active < SCO_OUT_BUFFER_COUNT; 238 } 239 #endif 240 241 void hci_transport_usb_set_path(int len, uint8_t * port_numbers){ 242 if (len > USB_MAX_PATH_LEN || !port_numbers){ 243 log_error("hci_transport_usb_set_path: len or port numbers invalid"); 244 return; 245 } 246 usb_path_len = len; 247 memcpy(usb_path, port_numbers, len); 248 } 249 250 // 251 static void queue_transfer(struct libusb_transfer *transfer){ 252 253 // log_info("queue_transfer %p, endpoint %x size %u", transfer, transfer->endpoint, transfer->actual_length); 254 255 transfer->user_data = NULL; 256 257 // insert first element 258 if (handle_packet == NULL) { 259 handle_packet = transfer; 260 return; 261 } 262 263 // Walk to end of list and add current packet there 264 struct libusb_transfer *temp = handle_packet; 265 while (temp->user_data) { 266 temp = (struct libusb_transfer*)temp->user_data; 267 } 268 temp->user_data = transfer; 269 } 270 271 LIBUSB_CALL static void async_callback(struct libusb_transfer *transfer){ 272 273 int c; 274 275 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED){ 276 log_info("shutdown, transfer %p", transfer); 277 } 278 279 280 // identify and free transfers as part of shutdown 281 #ifdef ENABLE_SCO_OVER_HCI 282 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED || sco_shutdown) { 283 for (c=0;c<SCO_IN_BUFFER_COUNT;c++){ 284 if (transfer == sco_in_transfer[c]){ 285 libusb_free_transfer(transfer); 286 sco_in_transfer[c] = 0; 287 return; 288 } 289 } 290 291 for (c=0;c<SCO_OUT_BUFFER_COUNT;c++){ 292 if (transfer == sco_out_transfers[c]){ 293 sco_out_transfers_in_flight[c] = 0; 294 libusb_free_transfer(transfer); 295 sco_out_transfers[c] = 0; 296 return; 297 } 298 } 299 } 300 #endif 301 302 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) { 303 for (c=0;c<EVENT_IN_BUFFER_COUNT;c++){ 304 if (transfer == event_in_transfer[c]){ 305 libusb_free_transfer(transfer); 306 event_in_transfer[c] = 0; 307 return; 308 } 309 } 310 for (c=0;c<ACL_IN_BUFFER_COUNT;c++){ 311 if (transfer == acl_in_transfer[c]){ 312 libusb_free_transfer(transfer); 313 acl_in_transfer[c] = 0; 314 return; 315 } 316 } 317 return; 318 } 319 320 #ifdef ENABLE_SCO_OVER_HCI 321 // mark SCO OUT transfer as done 322 for (c=0;c<SCO_OUT_BUFFER_COUNT;c++){ 323 if (transfer == sco_out_transfers[c]){ 324 sco_out_transfers_in_flight[c] = 0; 325 } 326 } 327 #endif 328 329 int r; 330 // log_info("begin async_callback endpoint %x, status %x, actual length %u", transfer->endpoint, transfer->status, transfer->actual_length ); 331 332 if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { 333 queue_transfer(transfer); 334 } else if (transfer->status == LIBUSB_TRANSFER_STALL){ 335 log_info("-> Transfer stalled, trying again"); 336 r = libusb_clear_halt(handle, transfer->endpoint); 337 if (r) { 338 log_error("Error rclearing halt %d", r); 339 } 340 r = libusb_submit_transfer(transfer); 341 if (r) { 342 log_error("Error re-submitting transfer %d", r); 343 } 344 } else { 345 log_info("async_callback. not data -> resubmit transfer, endpoint %x, status %x, length %u", transfer->endpoint, transfer->status, transfer->actual_length); 346 // No usable data, just resubmit packet 347 r = libusb_submit_transfer(transfer); 348 if (r) { 349 log_error("Error re-submitting transfer %d", r); 350 } 351 } 352 // log_info("end async_callback"); 353 } 354 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int usb_send_sco_packet(uint8_t *packet, int size){ 358 int r; 359 360 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 361 362 // log_info("usb_send_acl_packet enter, size %u", size); 363 364 // store packet in free slot 365 int tranfer_index = sco_ring_write; 366 uint8_t * data = &sco_out_ring_buffer[tranfer_index * SCO_PACKET_SIZE]; 367 memcpy(data, packet, size); 368 369 // setup transfer 370 // log_info("usb_send_sco_packet: size %u, max size %u, iso packet size %u", size, NUM_ISO_PACKETS * iso_packet_size, iso_packet_size); 371 struct libusb_transfer * sco_transfer = sco_out_transfers[tranfer_index]; 372 libusb_fill_iso_transfer(sco_transfer, handle, sco_out_addr, data, NUM_ISO_PACKETS * iso_packet_size, NUM_ISO_PACKETS, async_callback, NULL, 0); 373 libusb_set_iso_packet_lengths(sco_transfer, iso_packet_size); 374 r = libusb_submit_transfer(sco_transfer); 375 if (r < 0) { 376 log_error("Error submitting sco transfer, %d", r); 377 return -1; 378 } 379 380 // mark slot as full 381 sco_ring_write++; 382 if (sco_ring_write == SCO_OUT_BUFFER_COUNT){ 383 sco_ring_write = 0; 384 } 385 sco_out_transfers_active++; 386 sco_out_transfers_in_flight[tranfer_index] = 1; 387 388 // log_info("H2: queued packet at index %u, num active %u", tranfer_index, sco_out_transfers_active); 389 390 // notify upper stack that provided buffer can be used again 391 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 392 packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 393 394 // and if we have more space for SCO packets 395 if (sco_ring_have_space()) { 396 uint8_t event_sco[] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0}; 397 packet_handler(HCI_EVENT_PACKET, &event_sco[0], sizeof(event_sco)); 398 } 399 return 0; 400 } 401 402 static void sco_state_machine_init(void){ 403 sco_state = H2_W4_SCO_HEADER; 404 sco_read_pos = 0; 405 sco_bytes_to_read = 3; 406 } 407 408 static void handle_isochronous_data(uint8_t * buffer, uint16_t size){ 409 while (size){ 410 if (size < sco_bytes_to_read){ 411 // just store incomplete data 412 memcpy(&sco_buffer[sco_read_pos], buffer, size); 413 sco_read_pos += size; 414 sco_bytes_to_read -= size; 415 return; 416 } 417 // copy requested data 418 memcpy(&sco_buffer[sco_read_pos], buffer, sco_bytes_to_read); 419 sco_read_pos += sco_bytes_to_read; 420 buffer += sco_bytes_to_read; 421 size -= sco_bytes_to_read; 422 423 // chunk read successfully, next action 424 switch (sco_state){ 425 case H2_W4_SCO_HEADER: 426 sco_state = H2_W4_PAYLOAD; 427 sco_bytes_to_read = sco_buffer[2]; 428 break; 429 case H2_W4_PAYLOAD: 430 // packet complete 431 packet_handler(HCI_SCO_DATA_PACKET, sco_buffer, sco_read_pos); 432 sco_state_machine_init(); 433 break; 434 } 435 } 436 } 437 #endif 438 439 static void handle_completed_transfer(struct libusb_transfer *transfer){ 440 441 int resubmit = 0; 442 int signal_done = 0; 443 444 if (transfer->endpoint == event_in_addr) { 445 packet_handler(HCI_EVENT_PACKET, transfer-> buffer, transfer->actual_length); 446 resubmit = 1; 447 } else if (transfer->endpoint == acl_in_addr) { 448 // log_info("-> acl"); 449 packet_handler(HCI_ACL_DATA_PACKET, transfer-> buffer, transfer->actual_length); 450 resubmit = 1; 451 } else if (transfer->endpoint == 0){ 452 // log_info("command done, size %u", transfer->actual_length); 453 usb_command_active = 0; 454 signal_done = 1; 455 } else if (transfer->endpoint == acl_out_addr){ 456 // log_info("acl out done, size %u", transfer->actual_length); 457 usb_acl_out_active = 0; 458 signal_done = 1; 459 #ifdef ENABLE_SCO_OVER_HCI 460 } else if (transfer->endpoint == sco_in_addr) { 461 // log_info("handle_completed_transfer for SCO IN! num packets %u", transfer->NUM_ISO_PACKETS); 462 int i; 463 for (i = 0; i < transfer->num_iso_packets; i++) { 464 struct libusb_iso_packet_descriptor *pack = &transfer->iso_packet_desc[i]; 465 if (pack->status != LIBUSB_TRANSFER_COMPLETED) { 466 log_error("Error: pack %u status %d\n", i, pack->status); 467 continue; 468 } 469 if (!pack->actual_length) continue; 470 uint8_t * data = libusb_get_iso_packet_buffer_simple(transfer, i); 471 // printf_hexdump(data, pack->actual_length); 472 // log_info("handle_isochronous_data,size %u/%u", pack->length, pack->actual_length); 473 handle_isochronous_data(data, pack->actual_length); 474 } 475 resubmit = 1; 476 } else if (transfer->endpoint == sco_out_addr){ 477 int i; 478 for (i = 0; i < transfer->num_iso_packets; i++) { 479 struct libusb_iso_packet_descriptor *pack = &transfer->iso_packet_desc[i]; 480 if (pack->status != LIBUSB_TRANSFER_COMPLETED) { 481 log_error("Error: pack %u status %d\n", i, pack->status); 482 } 483 } 484 // log_info("sco out done, {{ %u/%u (%x)}, { %u/%u (%x)}, { %u/%u (%x)}}", 485 // transfer->iso_packet_desc[0].actual_length, transfer->iso_packet_desc[0].length, transfer->iso_packet_desc[0].status, 486 // transfer->iso_packet_desc[1].actual_length, transfer->iso_packet_desc[1].length, transfer->iso_packet_desc[1].status, 487 // transfer->iso_packet_desc[2].actual_length, transfer->iso_packet_desc[2].length, transfer->iso_packet_desc[2].status); 488 // notify upper layer if there's space for new SCO packets 489 490 if (sco_ring_have_space()) { 491 uint8_t event[] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0}; 492 packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 493 } 494 // decrease tab 495 sco_out_transfers_active--; 496 // log_info("H2: sco out complete, num active num active %u", sco_out_transfers_active); 497 #endif 498 } else { 499 log_info("usb_process_ds endpoint unknown %x", transfer->endpoint); 500 } 501 502 if (signal_done){ 503 // notify upper stack that provided buffer can be used again 504 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 505 packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 506 } 507 508 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 509 510 if (resubmit){ 511 // Re-submit transfer 512 transfer->user_data = NULL; 513 int r = libusb_submit_transfer(transfer); 514 if (r) { 515 log_error("Error re-submitting transfer %d", r); 516 } 517 } 518 } 519 520 static void usb_process_ds(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 521 522 UNUSED(ds); 523 UNUSED(callback_type); 524 525 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 526 527 // log_info("begin usb_process_ds"); 528 // always handling an event as we're called when data is ready 529 struct timeval tv; 530 memset(&tv, 0, sizeof(struct timeval)); 531 libusb_handle_events_timeout(NULL, &tv); 532 533 // Handle any packet in the order that they were received 534 while (handle_packet) { 535 // log_info("handle packet %p, endpoint %x, status %x", handle_packet, handle_packet->endpoint, handle_packet->status); 536 void * next = handle_packet->user_data; 537 handle_completed_transfer(handle_packet); 538 // handle case where libusb_close might be called by hci packet handler 539 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 540 541 // Move to next in the list of packets to handle 542 if (next) { 543 handle_packet = (struct libusb_transfer*)next; 544 } else { 545 handle_packet = NULL; 546 } 547 } 548 // log_info("end usb_process_ds"); 549 } 550 551 static void usb_process_ts(btstack_timer_source_t *timer) { 552 553 UNUSED(timer); 554 555 // log_info("in usb_process_ts"); 556 557 // timer is deactive, when timer callback gets called 558 usb_timer_active = 0; 559 560 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 561 562 // actually handled the packet in the pollfds function 563 usb_process_ds((struct btstack_data_source *) NULL, DATA_SOURCE_CALLBACK_READ); 564 565 // Get the amount of time until next event is due 566 long msec = ASYNC_POLLING_INTERVAL_MS; 567 568 // Activate timer 569 btstack_run_loop_set_timer(&usb_timer, msec); 570 btstack_run_loop_add_timer(&usb_timer); 571 usb_timer_active = 1; 572 573 return; 574 } 575 576 #ifndef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 577 578 // list of known devices, using VendorID/ProductID tuples 579 static const uint16_t known_bt_devices[] = { 580 // DeLOCK Bluetooth 4.0 581 0x0a5c, 0x21e8, 582 // Asus BT400 583 0x0b05, 0x17cb, 584 }; 585 586 static int num_known_devices = sizeof(known_bt_devices) / sizeof(uint16_t) / 2; 587 588 static int is_known_bt_device(uint16_t vendor_id, uint16_t product_id){ 589 int i; 590 for (i=0; i<num_known_devices; i++){ 591 if (known_bt_devices[i*2] == vendor_id && known_bt_devices[i*2+1] == product_id){ 592 return 1; 593 } 594 } 595 return 0; 596 } 597 598 static void scan_for_bt_endpoints(void) { 599 int r; 600 601 event_in_addr = 0; 602 acl_in_addr = 0; 603 acl_out_addr = 0; 604 sco_out_addr = 0; 605 sco_in_addr = 0; 606 607 // get endpoints from interface descriptor 608 struct libusb_config_descriptor *config_descriptor; 609 r = libusb_get_active_config_descriptor(dev, &config_descriptor); 610 611 int num_interfaces = config_descriptor->bNumInterfaces; 612 log_info("active configuration has %u interfaces", num_interfaces); 613 614 int i; 615 for (i = 0; i < num_interfaces ; i++){ 616 const struct libusb_interface *interface = &config_descriptor->interface[i]; 617 const struct libusb_interface_descriptor * interface_descriptor = interface->altsetting; 618 log_info("interface %u: %u endpoints", i, interface_descriptor->bNumEndpoints); 619 620 const struct libusb_endpoint_descriptor *endpoint = interface_descriptor->endpoint; 621 622 for (r=0;r<interface_descriptor->bNumEndpoints;r++,endpoint++){ 623 log_info("- endpoint %x, attributes %x", endpoint->bEndpointAddress, endpoint->bmAttributes); 624 625 switch (endpoint->bmAttributes & 0x3){ 626 case LIBUSB_TRANSFER_TYPE_INTERRUPT: 627 if (event_in_addr) continue; 628 event_in_addr = endpoint->bEndpointAddress; 629 log_info("-> using 0x%2.2X for HCI Events", event_in_addr); 630 break; 631 case LIBUSB_TRANSFER_TYPE_BULK: 632 if (endpoint->bEndpointAddress & 0x80) { 633 if (acl_in_addr) continue; 634 acl_in_addr = endpoint->bEndpointAddress; 635 log_info("-> using 0x%2.2X for ACL Data In", acl_in_addr); 636 } else { 637 if (acl_out_addr) continue; 638 acl_out_addr = endpoint->bEndpointAddress; 639 log_info("-> using 0x%2.2X for ACL Data Out", acl_out_addr); 640 } 641 break; 642 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: 643 if (endpoint->bEndpointAddress & 0x80) { 644 if (sco_in_addr) continue; 645 sco_in_addr = endpoint->bEndpointAddress; 646 log_info("-> using 0x%2.2X for SCO Data In", sco_in_addr); 647 } else { 648 if (sco_out_addr) continue; 649 sco_out_addr = endpoint->bEndpointAddress; 650 log_info("-> using 0x%2.2X for SCO Data Out", sco_out_addr); 651 } 652 break; 653 default: 654 break; 655 } 656 } 657 } 658 libusb_free_config_descriptor(config_descriptor); 659 } 660 661 // returns index of found device or -1 662 static int scan_for_bt_device(libusb_device **devs, int start_index) { 663 int i; 664 for (i = start_index; devs[i] ; i++){ 665 dev = devs[i]; 666 int r = libusb_get_device_descriptor(dev, &desc); 667 if (r < 0) { 668 log_error("failed to get device descriptor"); 669 return 0; 670 } 671 672 log_info("%04x:%04x (bus %d, device %d) - class %x subclass %x protocol %x ", 673 desc.idVendor, desc.idProduct, 674 libusb_get_bus_number(dev), libusb_get_device_address(dev), 675 desc.bDeviceClass, desc.bDeviceSubClass, desc.bDeviceProtocol); 676 677 // Detect USB Dongle based Class, Subclass, and Protocol 678 // The class code (bDeviceClass) is 0xE0 – Wireless Controller. 679 // The SubClass code (bDeviceSubClass) is 0x01 – RF Controller. 680 // The Protocol code (bDeviceProtocol) is 0x01 – Bluetooth programming. 681 // if (desc.bDeviceClass == 0xe0 && desc.bDeviceSubClass == 0x01 && desc.bDeviceProtocol == 0x01){ 682 if (desc.bDeviceClass == 0xE0 && desc.bDeviceSubClass == 0x01 && desc.bDeviceProtocol == 0x01) { 683 return i; 684 } 685 686 // Detect USB Dongle based on whitelist 687 if (is_known_bt_device(desc.idVendor, desc.idProduct)) { 688 return i; 689 } 690 } 691 return -1; 692 } 693 #endif 694 695 static int prepare_device(libusb_device_handle * aHandle){ 696 697 // print device path 698 uint8_t port_numbers[USB_MAX_PATH_LEN]; 699 libusb_device * device = libusb_get_device(aHandle); 700 int path_len = libusb_get_port_numbers(device, port_numbers, USB_MAX_PATH_LEN); 701 printf("USB Path: "); 702 int i; 703 for (i=0;i<path_len;i++){ 704 if (i) printf("-"); 705 printf("%02x", port_numbers[i]); 706 } 707 printf("\n"); 708 709 int r; 710 int kernel_driver_detached = 0; 711 712 // Detach OS driver (not possible for OS X and WIN32) 713 #if !defined(__APPLE__) && !defined(_WIN32) 714 r = libusb_kernel_driver_active(aHandle, 0); 715 if (r < 0) { 716 log_error("libusb_kernel_driver_active error %d", r); 717 libusb_close(aHandle); 718 return r; 719 } 720 721 if (r == 1) { 722 r = libusb_detach_kernel_driver(aHandle, 0); 723 if (r < 0) { 724 log_error("libusb_detach_kernel_driver error %d", r); 725 libusb_close(aHandle); 726 return r; 727 } 728 kernel_driver_detached = 1; 729 } 730 log_info("libusb_detach_kernel_driver"); 731 #endif 732 733 const int configuration = 1; 734 log_info("setting configuration %d...", configuration); 735 r = libusb_set_configuration(aHandle, configuration); 736 if (r < 0) { 737 log_error("Error libusb_set_configuration: %d", r); 738 if (kernel_driver_detached){ 739 libusb_attach_kernel_driver(aHandle, 0); 740 } 741 libusb_close(aHandle); 742 return r; 743 } 744 745 // reserve access to device 746 log_info("claiming interface 0..."); 747 r = libusb_claim_interface(aHandle, 0); 748 if (r < 0) { 749 log_error("Error claiming interface %d", r); 750 if (kernel_driver_detached){ 751 libusb_attach_kernel_driver(aHandle, 0); 752 } 753 libusb_close(aHandle); 754 return r; 755 } 756 757 #ifdef ENABLE_SCO_OVER_HCI 758 log_info("claiming interface 1..."); 759 r = libusb_claim_interface(aHandle, 1); 760 if (r < 0) { 761 log_error("Error claiming interface %d", r); 762 if (kernel_driver_detached){ 763 libusb_attach_kernel_driver(aHandle, 0); 764 } 765 libusb_close(aHandle); 766 return r; 767 } 768 #endif 769 770 return 0; 771 } 772 773 static libusb_device_handle * try_open_device(libusb_device * device){ 774 int r; 775 776 libusb_device_handle * dev_handle; 777 r = libusb_open(device, &dev_handle); 778 779 if (r < 0) { 780 log_error("libusb_open failed!"); 781 dev_handle = NULL; 782 return NULL; 783 } 784 785 log_info("libusb open %d, handle %p", r, dev_handle); 786 787 // reset device 788 libusb_reset_device(dev_handle); 789 if (r < 0) { 790 log_error("libusb_reset_device failed!"); 791 libusb_close(dev_handle); 792 return NULL; 793 } 794 return dev_handle; 795 } 796 797 #ifdef ENABLE_SCO_OVER_HCI 798 799 static int usb_sco_start(void){ 800 801 printf("usb_sco_start\n"); 802 log_info("usb_sco_start"); 803 804 sco_state_machine_init(); 805 sco_ring_init(); 806 807 int alt_setting; 808 if (sco_voice_setting & 0x0020){ 809 // 16-bit PCM 810 alt_setting = alt_setting_16_bit[sco_num_connections-1]; 811 } else { 812 // 8-bit PCM or mSBC 813 alt_setting = alt_setting_8_bit[sco_num_connections-1]; 814 } 815 // derive iso packet size from alt setting 816 iso_packet_size = iso_packet_size_for_alt_setting[alt_setting]; 817 818 log_info("Switching to setting %u on interface 1..", alt_setting); 819 int r = libusb_set_interface_alt_setting(handle, 1, alt_setting); 820 if (r < 0) { 821 log_error("Error setting alternative setting %u for interface 1: %s\n", alt_setting, libusb_error_name(r)); 822 return r; 823 } 824 825 // incoming 826 int c; 827 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 828 sco_in_transfer[c] = libusb_alloc_transfer(NUM_ISO_PACKETS); // isochronous transfers SCO in 829 if (!sco_in_transfer[c]) { 830 usb_close(); 831 return LIBUSB_ERROR_NO_MEM; 832 } 833 // configure sco_in handlers 834 libusb_fill_iso_transfer(sco_in_transfer[c], handle, sco_in_addr, 835 hci_sco_in_buffer[c], NUM_ISO_PACKETS * iso_packet_size, NUM_ISO_PACKETS, async_callback, NULL, 0); 836 libusb_set_iso_packet_lengths(sco_in_transfer[c], iso_packet_size); 837 r = libusb_submit_transfer(sco_in_transfer[c]); 838 if (r) { 839 log_error("Error submitting isochronous in transfer %d", r); 840 usb_close(); 841 return r; 842 } 843 } 844 845 // outgoing 846 for (c=0; c < SCO_OUT_BUFFER_COUNT ; c++){ 847 sco_out_transfers[c] = libusb_alloc_transfer(NUM_ISO_PACKETS); // 1 isochronous transfers SCO out - up to 3 parts 848 sco_out_transfers_in_flight[c] = 0; 849 } 850 return 0; 851 } 852 853 static void usb_sco_stop(void){ 854 855 printf("usb_sco_stop\n"); 856 857 log_info("usb_sco_stop"); 858 sco_shutdown = 1; 859 860 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_ERROR); 861 862 int c; 863 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 864 libusb_cancel_transfer(sco_in_transfer[c]); 865 } 866 867 for (c = 0; c < SCO_OUT_BUFFER_COUNT ; c++){ 868 if (sco_out_transfers_in_flight[c]) { 869 libusb_cancel_transfer(sco_out_transfers[c]); 870 } else { 871 libusb_free_transfer(sco_out_transfers[c]); 872 sco_out_transfers[c] = 0; 873 } 874 } 875 876 // wait until all transfers are completed 877 int completed = 0; 878 while (!completed){ 879 struct timeval tv; 880 memset(&tv, 0, sizeof(struct timeval)); 881 libusb_handle_events_timeout(NULL, &tv); 882 // check if all done 883 completed = 1; 884 885 // Cancel all synchronous transfer 886 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 887 if (sco_in_transfer[c]){ 888 completed = 0; 889 break; 890 } 891 } 892 893 if (!completed) continue; 894 895 for (c=0; c < SCO_OUT_BUFFER_COUNT ; c++){ 896 if (sco_out_transfers[c]){ 897 completed = 0; 898 break; 899 } 900 } 901 } 902 sco_shutdown = 0; 903 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_WARNING); 904 905 log_info("Switching to setting %u on interface 1..", 0); 906 int r = libusb_set_interface_alt_setting(handle, 1, 0); 907 if (r < 0) { 908 log_error("Error setting alternative setting %u for interface 1: %s", 0, libusb_error_name(r)); 909 return; 910 } 911 912 printf("usb_sco_stop done\n"); 913 } 914 915 916 917 #endif 918 919 static int usb_open(void){ 920 int r; 921 922 handle_packet = NULL; 923 924 // default endpoint addresses 925 event_in_addr = 0x81; // EP1, IN interrupt 926 acl_in_addr = 0x82; // EP2, IN bulk 927 acl_out_addr = 0x02; // EP2, OUT bulk 928 sco_in_addr = 0x83; // EP3, IN isochronous 929 sco_out_addr = 0x03; // EP3, OUT isochronous 930 931 // USB init 932 r = libusb_init(NULL); 933 if (r < 0) return -1; 934 935 libusb_state = LIB_USB_OPENED; 936 937 // configure debug level 938 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_WARNING); 939 940 #ifdef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 941 942 // Use a specified device 943 log_info("Want vend: %04x, prod: %04x", USB_VENDOR_ID, USB_PRODUCT_ID); 944 handle = libusb_open_device_with_vid_pid(NULL, USB_VENDOR_ID, USB_PRODUCT_ID); 945 946 if (!handle){ 947 log_error("libusb_open_device_with_vid_pid failed!"); 948 usb_close(); 949 return -1; 950 } 951 log_info("libusb open %d, handle %p", r, handle); 952 953 r = prepare_device(handle); 954 if (r < 0){ 955 usb_close(); 956 return -1; 957 } 958 959 #else 960 // Scan system for an appropriate devices 961 libusb_device **devs; 962 ssize_t num_devices; 963 964 log_info("Scanning for USB Bluetooth device"); 965 num_devices = libusb_get_device_list(NULL, &devs); 966 if (num_devices < 0) { 967 usb_close(); 968 return -1; 969 } 970 971 dev = NULL; 972 973 if (usb_path_len){ 974 int i; 975 for (i=0;i<num_devices;i++){ 976 uint8_t port_numbers[USB_MAX_PATH_LEN]; 977 int len = libusb_get_port_numbers(devs[i], port_numbers, USB_MAX_PATH_LEN); 978 if (len != usb_path_len) continue; 979 if (memcmp(usb_path, port_numbers, len) == 0){ 980 log_info("USB device found at specified path"); 981 handle = try_open_device(devs[i]); 982 if (!handle) continue; 983 984 r = prepare_device(handle); 985 if (r < 0) continue; 986 987 dev = devs[i]; 988 libusb_state = LIB_USB_INTERFACE_CLAIMED; 989 break; 990 }; 991 } 992 if (!handle){ 993 log_error("USB device with given path not found"); 994 printf("USB device with given path not found\n"); 995 return -1; 996 } 997 } else { 998 999 int deviceIndex = -1; 1000 while (1){ 1001 // look for next Bluetooth dongle 1002 deviceIndex = scan_for_bt_device(devs, deviceIndex+1); 1003 if (deviceIndex < 0) break; 1004 1005 log_info("USB Bluetooth device found, index %u", deviceIndex); 1006 1007 handle = try_open_device(devs[deviceIndex]); 1008 if (!handle) continue; 1009 1010 r = prepare_device(handle); 1011 if (r < 0) continue; 1012 1013 dev = devs[deviceIndex]; 1014 libusb_state = LIB_USB_INTERFACE_CLAIMED; 1015 break; 1016 } 1017 } 1018 1019 libusb_free_device_list(devs, 1); 1020 1021 if (handle == 0){ 1022 log_error("No USB Bluetooth device found"); 1023 return -1; 1024 } 1025 1026 scan_for_bt_endpoints(); 1027 1028 #endif 1029 1030 // allocate transfer handlers 1031 int c; 1032 for (c = 0 ; c < EVENT_IN_BUFFER_COUNT ; c++) { 1033 event_in_transfer[c] = libusb_alloc_transfer(0); // 0 isochronous transfers Events 1034 if (!event_in_transfer[c]) { 1035 usb_close(); 1036 return LIBUSB_ERROR_NO_MEM; 1037 } 1038 } 1039 for (c = 0 ; c < ACL_IN_BUFFER_COUNT ; c++) { 1040 acl_in_transfer[c] = libusb_alloc_transfer(0); // 0 isochronous transfers ACL in 1041 if (!acl_in_transfer[c]) { 1042 usb_close(); 1043 return LIBUSB_ERROR_NO_MEM; 1044 } 1045 } 1046 1047 command_out_transfer = libusb_alloc_transfer(0); 1048 acl_out_transfer = libusb_alloc_transfer(0); 1049 1050 // TODO check for error 1051 1052 libusb_state = LIB_USB_TRANSFERS_ALLOCATED; 1053 1054 for (c = 0 ; c < EVENT_IN_BUFFER_COUNT ; c++) { 1055 // configure event_in handlers 1056 libusb_fill_interrupt_transfer(event_in_transfer[c], handle, event_in_addr, 1057 hci_event_in_buffer[c], HCI_ACL_BUFFER_SIZE, async_callback, NULL, 0) ; 1058 r = libusb_submit_transfer(event_in_transfer[c]); 1059 if (r) { 1060 log_error("Error submitting interrupt transfer %d", r); 1061 usb_close(); 1062 return r; 1063 } 1064 } 1065 1066 for (c = 0 ; c < ACL_IN_BUFFER_COUNT ; c++) { 1067 // configure acl_in handlers 1068 libusb_fill_bulk_transfer(acl_in_transfer[c], handle, acl_in_addr, 1069 hci_acl_in_buffer[c] + HCI_INCOMING_PRE_BUFFER_SIZE, HCI_ACL_BUFFER_SIZE, async_callback, NULL, 0) ; 1070 r = libusb_submit_transfer(acl_in_transfer[c]); 1071 if (r) { 1072 log_error("Error submitting bulk in transfer %d", r); 1073 usb_close(); 1074 return r; 1075 } 1076 1077 } 1078 1079 // Check for pollfds functionality 1080 doing_pollfds = libusb_pollfds_handle_timeouts(NULL); 1081 1082 // NOTE: using pollfds doesn't work on Linux, so it is disable until further investigation here 1083 doing_pollfds = 0; 1084 1085 if (doing_pollfds) { 1086 log_info("Async using pollfds:"); 1087 1088 const struct libusb_pollfd ** pollfd = libusb_get_pollfds(NULL); 1089 for (num_pollfds = 0 ; pollfd[num_pollfds] ; num_pollfds++); 1090 pollfd_data_sources = (btstack_data_source_t *)malloc(sizeof(btstack_data_source_t) * num_pollfds); 1091 if (!pollfd_data_sources){ 1092 log_error("Cannot allocate data sources for pollfds"); 1093 usb_close(); 1094 return 1; 1095 } 1096 for (r = 0 ; r < num_pollfds ; r++) { 1097 btstack_data_source_t *ds = &pollfd_data_sources[r]; 1098 btstack_run_loop_set_data_source_fd(ds, pollfd[r]->fd); 1099 btstack_run_loop_set_data_source_handler(ds, &usb_process_ds); 1100 btstack_run_loop_enable_data_source_callbacks(ds, DATA_SOURCE_CALLBACK_READ); 1101 btstack_run_loop_add_data_source(ds); 1102 log_info("%u: %p fd: %u, events %x", r, pollfd[r], pollfd[r]->fd, pollfd[r]->events); 1103 } 1104 free(pollfd); 1105 } else { 1106 log_info("Async using timers:"); 1107 1108 usb_timer.process = usb_process_ts; 1109 btstack_run_loop_set_timer(&usb_timer, ASYNC_POLLING_INTERVAL_MS); 1110 btstack_run_loop_add_timer(&usb_timer); 1111 usb_timer_active = 1; 1112 } 1113 1114 return 0; 1115 } 1116 1117 static int usb_close(void){ 1118 int c; 1119 int completed = 0; 1120 1121 log_info("usb_close"); 1122 1123 switch (libusb_state){ 1124 case LIB_USB_CLOSED: 1125 break; 1126 1127 case LIB_USB_TRANSFERS_ALLOCATED: 1128 libusb_state = LIB_USB_INTERFACE_CLAIMED; 1129 1130 if(usb_timer_active) { 1131 btstack_run_loop_remove_timer(&usb_timer); 1132 usb_timer_active = 0; 1133 } 1134 1135 if (doing_pollfds){ 1136 int r; 1137 for (r = 0 ; r < num_pollfds ; r++) { 1138 btstack_data_source_t *ds = &pollfd_data_sources[r]; 1139 btstack_run_loop_remove_data_source(ds); 1140 } 1141 free(pollfd_data_sources); 1142 pollfd_data_sources = NULL; 1143 num_pollfds = 0; 1144 doing_pollfds = 0; 1145 } 1146 1147 case LIB_USB_INTERFACE_CLAIMED: 1148 // Cancel all transfers, ignore warnings for this 1149 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_ERROR); 1150 for (c = 0 ; c < EVENT_IN_BUFFER_COUNT ; c++) { 1151 if (event_in_transfer[c]){ 1152 log_info("cancel event_in_transfer[%u] = %p", c, event_in_transfer[c]); 1153 libusb_cancel_transfer(event_in_transfer[c]); 1154 } 1155 } 1156 for (c = 0 ; c < ACL_IN_BUFFER_COUNT ; c++) { 1157 if (acl_in_transfer[c]){ 1158 log_info("cancel acl_in_transfer[%u] = %p", c, acl_in_transfer[c]); 1159 libusb_cancel_transfer(acl_in_transfer[c]); 1160 } 1161 } 1162 #ifdef ENABLE_SCO_OVER_HCI 1163 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 1164 if (sco_in_transfer[c]){ 1165 log_info("cancel sco_in_transfer[%u] = %p", c, sco_in_transfer[c]); 1166 libusb_cancel_transfer(sco_in_transfer[c]); 1167 } 1168 } 1169 for (c = 0; c < SCO_OUT_BUFFER_COUNT ; c++){ 1170 if (sco_out_transfers_in_flight[c]) { 1171 log_info("cancel sco_out_transfers[%u] = %p", c, sco_out_transfers[c]); 1172 libusb_cancel_transfer(sco_out_transfers[c]); 1173 } else { 1174 libusb_free_transfer(sco_out_transfers[c]); 1175 sco_out_transfers[c] = 0; 1176 } 1177 } 1178 #endif 1179 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_WARNING); 1180 1181 // wait until all transfers are completed - or 20 iterations 1182 int countdown = 20; 1183 while (!completed){ 1184 1185 if (--countdown == 0){ 1186 log_info("Not all transfers cancelled, leaking a bit."); 1187 break; 1188 } 1189 1190 struct timeval tv; 1191 memset(&tv, 0, sizeof(struct timeval)); 1192 libusb_handle_events_timeout(NULL, &tv); 1193 // check if all done 1194 completed = 1; 1195 for (c=0;c<EVENT_IN_BUFFER_COUNT;c++){ 1196 if (event_in_transfer[c]) { 1197 log_info("event_in_transfer[%u] still active (%p)", c, event_in_transfer[c]); 1198 completed = 0; 1199 break; 1200 } 1201 } 1202 1203 if (!completed) continue; 1204 1205 for (c=0;c<ACL_IN_BUFFER_COUNT;c++){ 1206 if (acl_in_transfer[c]) { 1207 log_info("acl_in_transfer[%u] still active (%p)", c, acl_in_transfer[c]); 1208 completed = 0; 1209 break; 1210 } 1211 } 1212 1213 #ifdef ENABLE_SCO_OVER_HCI 1214 if (!completed) continue; 1215 1216 // Cancel all synchronous transfer 1217 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 1218 if (sco_in_transfer[c]){ 1219 log_info("sco_in_transfer[%u] still active (%p)", c, sco_in_transfer[c]); 1220 completed = 0; 1221 break; 1222 } 1223 } 1224 1225 if (!completed) continue; 1226 1227 for (c=0; c < SCO_OUT_BUFFER_COUNT ; c++){ 1228 if (sco_out_transfers[c]){ 1229 log_info("sco_out_transfers[%u] still active (%p)", c, sco_out_transfers[c]); 1230 completed = 0; 1231 break; 1232 } 1233 } 1234 #endif 1235 } 1236 1237 // finally release interface 1238 libusb_release_interface(handle, 0); 1239 #ifdef ENABLE_SCO_OVER_HCI 1240 libusb_release_interface(handle, 1); 1241 #endif 1242 log_info("Libusb shutdown complete"); 1243 1244 case LIB_USB_DEVICE_OPENDED: 1245 libusb_close(handle); 1246 1247 case LIB_USB_OPENED: 1248 libusb_exit(NULL); 1249 } 1250 1251 libusb_state = LIB_USB_CLOSED; 1252 handle = NULL; 1253 1254 return 0; 1255 } 1256 1257 static int usb_send_cmd_packet(uint8_t *packet, int size){ 1258 int r; 1259 1260 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 1261 1262 // async 1263 libusb_fill_control_setup(hci_cmd_buffer, LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_RECIPIENT_INTERFACE, 0, 0, 0, size); 1264 memcpy(hci_cmd_buffer + LIBUSB_CONTROL_SETUP_SIZE, packet, size); 1265 1266 // prepare transfer 1267 int completed = 0; 1268 libusb_fill_control_transfer(command_out_transfer, handle, hci_cmd_buffer, async_callback, &completed, 0); 1269 command_out_transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER; 1270 1271 // update stata before submitting transfer 1272 usb_command_active = 1; 1273 1274 // submit transfer 1275 r = libusb_submit_transfer(command_out_transfer); 1276 1277 if (r < 0) { 1278 usb_command_active = 0; 1279 log_error("Error submitting cmd transfer %d", r); 1280 return -1; 1281 } 1282 1283 return 0; 1284 } 1285 1286 static int usb_send_acl_packet(uint8_t *packet, int size){ 1287 int r; 1288 1289 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 1290 1291 // log_info("usb_send_acl_packet enter, size %u", size); 1292 1293 // prepare transfer 1294 int completed = 0; 1295 libusb_fill_bulk_transfer(acl_out_transfer, handle, acl_out_addr, packet, size, 1296 async_callback, &completed, 0); 1297 acl_out_transfer->type = LIBUSB_TRANSFER_TYPE_BULK; 1298 1299 // update stata before submitting transfer 1300 usb_acl_out_active = 1; 1301 1302 r = libusb_submit_transfer(acl_out_transfer); 1303 if (r < 0) { 1304 usb_acl_out_active = 0; 1305 log_error("Error submitting acl transfer, %d", r); 1306 return -1; 1307 } 1308 1309 return 0; 1310 } 1311 1312 static int usb_can_send_packet_now(uint8_t packet_type){ 1313 switch (packet_type){ 1314 case HCI_COMMAND_DATA_PACKET: 1315 return !usb_command_active; 1316 case HCI_ACL_DATA_PACKET: 1317 return !usb_acl_out_active; 1318 #ifdef ENABLE_SCO_OVER_HCI 1319 case HCI_SCO_DATA_PACKET: 1320 return sco_ring_have_space(); 1321 #endif 1322 default: 1323 return 0; 1324 } 1325 } 1326 1327 static int usb_send_packet(uint8_t packet_type, uint8_t * packet, int size){ 1328 switch (packet_type){ 1329 case HCI_COMMAND_DATA_PACKET: 1330 return usb_send_cmd_packet(packet, size); 1331 case HCI_ACL_DATA_PACKET: 1332 return usb_send_acl_packet(packet, size); 1333 #ifdef ENABLE_SCO_OVER_HCI 1334 case HCI_SCO_DATA_PACKET: 1335 return usb_send_sco_packet(packet, size); 1336 #endif 1337 default: 1338 return -1; 1339 } 1340 } 1341 1342 #ifdef ENABLE_SCO_OVER_HCI 1343 static void usb_set_sco_config(uint16_t voice_setting, int num_connections){ 1344 log_info("usb_set_sco_config: voice settings 0x%04x, num connections %u", voice_setting, num_connections); 1345 1346 if (num_connections != sco_num_connections){ 1347 sco_voice_setting = voice_setting; 1348 if (sco_num_connections){ 1349 usb_sco_stop(); 1350 } 1351 sco_num_connections = num_connections; 1352 if (num_connections){ 1353 usb_sco_start(); 1354 } 1355 } 1356 } 1357 #endif 1358 1359 static void usb_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1360 log_info("registering packet handler"); 1361 packet_handler = handler; 1362 } 1363 1364 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1365 UNUSED(packet_type); 1366 UNUSED(packet); 1367 UNUSED(size); 1368 } 1369 1370 // get usb singleton 1371 const hci_transport_t * hci_transport_usb_instance(void) { 1372 if (!hci_transport_usb) { 1373 hci_transport_usb = (hci_transport_t*) malloc( sizeof(hci_transport_t)); 1374 memset(hci_transport_usb, 0, sizeof(hci_transport_t)); 1375 hci_transport_usb->name = "H2_LIBUSB"; 1376 hci_transport_usb->open = usb_open; 1377 hci_transport_usb->close = usb_close; 1378 hci_transport_usb->register_packet_handler = usb_register_packet_handler; 1379 hci_transport_usb->can_send_packet_now = usb_can_send_packet_now; 1380 hci_transport_usb->send_packet = usb_send_packet; 1381 #ifdef ENABLE_SCO_OVER_HCI 1382 hci_transport_usb->set_sco_config = usb_set_sco_config; 1383 #endif 1384 } 1385 return hci_transport_usb; 1386 } 1387