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 BLUEKITCHEN 24 * GMBH 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 <strings.h> 57 #include <string.h> 58 #include <unistd.h> /* UNIX standard function definitions */ 59 #include <sys/types.h> 60 61 #include <libusb.h> 62 63 // bail out if seen libusb is apperently to old 64 #if !defined(LIBUSB_API_VERSION) || (LIBUSB_API_VERSION < 0x01000104) 65 #error libusb api version to old! 66 #endif 67 68 #include <poll.h> 69 70 #include "btstack_config.h" 71 72 #include "btstack_debug.h" 73 #include "hci.h" 74 #include "hci_transport.h" 75 #include "hci_transport_usb.h" 76 77 #define DEBUG 78 79 // deal with changes in libusb API: 80 #ifdef LIBUSB_API_VERSION 81 #if LIBUSB_API_VERSION >= 0x01000106 82 // since 1.0.22, libusb_set_option replaces libusb_set_debug 83 #define libusb_set_debug(context,level) libusb_set_option(context, LIBUSB_OPTION_LOG_LEVEL, level) 84 #endif 85 #endif 86 87 #if (USB_VENDOR_ID != 0) && (USB_PRODUCT_ID != 0) 88 #define HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 89 #endif 90 91 #define ACL_IN_BUFFER_COUNT 3 92 #define EVENT_IN_BUFFER_COUNT 3 93 #define EVENT_OUT_BUFFER_COUNT 4 94 #define SCO_IN_BUFFER_COUNT 10 95 96 #define ASYNC_POLLING_INTERVAL_MS 1 97 98 // 99 // Bluetooth USB Transport Alternate Settings: 100 // 101 // 0: No active voice channels (for USB compliance) 102 // 1: One 8 kHz voice channel with 8-bit encoding 103 // 2: Two 8 kHz voice channels with 8-bit encoding or one 8 kHz voice channel with 16-bit encoding 104 // 3: Three 8 kHz voice channels with 8-bit encoding 105 // 4: Two 8 kHz voice channels with 16-bit encoding or one 16 kHz voice channel with 16-bit encoding 106 // 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 107 // --> support only a single SCO connection 108 // #define ALT_SETTING (1) 109 110 #ifdef ENABLE_SCO_OVER_HCI 111 // alt setting for 1-3 connections and 8/16 bit 112 static const int alt_setting_8_bit[] = {1,2,3}; 113 static const int alt_setting_16_bit[] = {2,4,5}; 114 115 // for ALT_SETTING >= 1 and 8-bit channel, we need the following isochronous packets 116 // One complete SCO packet with 24 frames every 3 frames (== 3 ms) 117 #define NUM_ISO_PACKETS (3) 118 119 static const uint16_t iso_packet_size_for_alt_setting[] = { 120 0, 121 9, 122 17, 123 25, 124 33, 125 49, 126 63, 127 }; 128 #endif 129 130 // 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) 131 // 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 132 #define SCO_PACKET_SIZE (49 * NUM_ISO_PACKETS) 133 134 // Outgoing SCO packet queue 135 // simplified ring buffer implementation 136 #define SCO_OUT_BUFFER_COUNT (20) 137 #define SCO_OUT_BUFFER_SIZE (SCO_OUT_BUFFER_COUNT * SCO_PACKET_SIZE) 138 139 // seems to be the max depth for USB 3 140 #define USB_MAX_PATH_LEN 7 141 142 // prototypes 143 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size); 144 static int usb_close(void); 145 146 typedef enum { 147 LIB_USB_CLOSED = 0, 148 LIB_USB_OPENED, 149 LIB_USB_DEVICE_OPENDED, 150 LIB_USB_INTERFACE_CLAIMED, 151 LIB_USB_TRANSFERS_ALLOCATED 152 } libusb_state_t; 153 154 // SCO packet state machine 155 typedef enum { 156 H2_W4_SCO_HEADER = 1, 157 H2_W4_PAYLOAD, 158 } H2_SCO_STATE; 159 160 static libusb_state_t libusb_state = LIB_USB_CLOSED; 161 162 // single instance 163 static hci_transport_t * hci_transport_usb = NULL; 164 165 static void (*packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size) = dummy_handler; 166 167 // libusb 168 #ifndef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 169 static struct libusb_device_descriptor desc; 170 #endif 171 static libusb_device_handle * handle; 172 173 // known devices 174 typedef struct { 175 btstack_linked_item_t next; 176 uint16_t vendor_id; 177 uint16_t product_id; 178 } usb_known_device_t; 179 180 static btstack_linked_list_t usb_knwon_devices; 181 182 typedef struct list_head { 183 struct list_head *next, *prev; 184 } list_head_t; 185 186 static inline void __list_add( list_head_t *new, list_head_t *prev, list_head_t *next ) { 187 next->prev = new; 188 new->next = next; 189 new->prev = prev; 190 prev->next = new; 191 } 192 193 #define LIST_HEAD_INIT(name) { &(name), &(name) } 194 195 static inline void init_list_head( list_head_t *list ) { 196 list->next = list; 197 list->prev = list; 198 } 199 200 static inline void list_add( list_head_t *new, list_head_t *head ) { 201 __list_add( new, head, head->next ); 202 } 203 204 static inline void list_add_tail( list_head_t *new, list_head_t *head ) { 205 __list_add( new, head->prev, head ); 206 } 207 208 static inline void list_del( list_head_t *entry ) { 209 entry->next->prev = entry->prev; 210 entry->prev->next = entry->next; 211 212 entry->prev = NULL; 213 entry->next = NULL; 214 } 215 216 static inline bool list_empty( list_head_t *head ) { 217 return head->next == head; 218 } 219 220 static inline list_head_t *list_pop_front( list_head_t *head ) { 221 list_head_t *front = head->next; 222 list_del( front ); 223 return front; 224 } 225 226 227 typedef struct { 228 list_head_t list; 229 struct libusb_transfer *t; 230 uint8_t *data; 231 bool in_flight; 232 } usb_transfer_list_entry_t; 233 234 typedef struct { 235 list_head_t transfers; 236 int nbr; 237 usb_transfer_list_entry_t entries[0]; 238 } usb_transfer_list_t; 239 240 static struct libusb_transfer *usb_transfer_list_acquire( usb_transfer_list_t *list ) { 241 usb_transfer_list_entry_t *current = (usb_transfer_list_entry_t*)list_pop_front( &list->transfers ); 242 struct libusb_transfer *transfer = current->t; 243 current->in_flight = true; 244 return transfer; 245 } 246 void usb_transfer_list_free( usb_transfer_list_t *list ); 247 248 static void usb_transfer_list_release( usb_transfer_list_t *list, struct libusb_transfer *transfer ) { 249 usb_transfer_list_entry_t *current = (usb_transfer_list_entry_t*)transfer->user_data; 250 assert( current != NULL ); 251 current->in_flight = false; 252 list_add( ¤t->list, &list->transfers ); 253 } 254 255 static bool usb_transfer_list_empty( usb_transfer_list_t *list ) { 256 return list_empty( &list->transfers ); 257 } 258 259 static usb_transfer_list_t *usb_transfer_list_alloc( int nbr, int iso_packets, int length ) { 260 usb_transfer_list_t *list = malloc( sizeof(usb_transfer_list_t) + nbr*sizeof(usb_transfer_list_entry_t) ); 261 init_list_head( &list->transfers ); 262 list->nbr = nbr; 263 for( int i=0; i<nbr; ++i ) 264 { 265 usb_transfer_list_entry_t *entry = &list->entries[i]; 266 struct libusb_transfer *transfer = libusb_alloc_transfer(iso_packets); 267 entry->data = malloc( length ); 268 transfer->buffer = entry->data; 269 transfer->user_data = entry; 270 entry->t = transfer; 271 usb_transfer_list_release( list, transfer ); 272 assert( entry->t->user_data != NULL ); 273 } 274 return list; 275 } 276 277 static void usb_transfer_list_cancel( usb_transfer_list_t *list ) { 278 for( int i=0; i<list->nbr; ++i ) { 279 usb_transfer_list_entry_t *current = &list->entries[i]; 280 if( current->in_flight ) { 281 libusb_cancel_transfer( current->t ); 282 } 283 } 284 } 285 286 static int usb_transfer_list_in_flight( usb_transfer_list_t *list ) { 287 int cnt = 0; 288 for(int i=0; i<list->nbr; ++i) { 289 usb_transfer_list_entry_t *entry = &list->entries[i]; 290 if( entry->in_flight ) { 291 ++cnt; 292 } 293 } 294 return cnt; 295 } 296 297 298 static void usb_transfer_list_free_entry( struct libusb_transfer *transfer ) { 299 usb_transfer_list_entry_t *current = (usb_transfer_list_entry_t*)transfer->user_data; 300 free( current->data ); 301 libusb_free_transfer( transfer ); 302 current->in_flight = false; 303 current->t = NULL; 304 current->data = NULL; 305 } 306 307 void usb_transfer_list_free( usb_transfer_list_t *list ) { 308 for( int i=0; i<list->nbr; ++i ) { 309 usb_transfer_list_entry_t *entry = &list->entries[i]; 310 assert( entry->in_flight == false ); 311 if( entry->t ) { 312 usb_transfer_list_free_entry( entry->t ); 313 } 314 } 315 free( list ); 316 } 317 318 static usb_transfer_list_t *default_transfer_list = NULL; 319 320 // For (ab)use as a linked list of received packets 321 static list_head_t handle_packet_list = LIST_HEAD_INIT(handle_packet_list); 322 323 static void enqueue_transfer(struct libusb_transfer *transfer) { 324 usb_transfer_list_entry_t *current = (usb_transfer_list_entry_t*)transfer->user_data; 325 assert( current != NULL ); 326 list_add_tail( ¤t->list, &handle_packet_list ); 327 } 328 329 static void signal_acknowledge(void); 330 static void signal_sco_can_send_now(void); 331 332 #ifdef ENABLE_SCO_OVER_HCI 333 334 #ifdef _WIN32 335 #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" 336 #endif 337 338 // incoming SCO 339 static H2_SCO_STATE sco_state; 340 static uint8_t sco_buffer[255+3 + SCO_PACKET_SIZE]; 341 static uint16_t sco_read_pos; 342 static uint16_t sco_bytes_to_read; 343 344 // pause/resume 345 static uint16_t sco_voice_setting; 346 static int sco_num_connections; 347 static bool sco_activated; 348 349 // dynamic SCO configuration 350 static uint16_t iso_packet_size; 351 static int sco_enabled; 352 353 usb_transfer_list_t *sco_transfer_list = NULL; 354 355 #endif 356 357 358 static int doing_pollfds; 359 static int num_pollfds; 360 static btstack_data_source_t * pollfd_data_sources; 361 362 static void usb_transport_response_ds(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type); 363 static btstack_data_source_t transport_response; 364 365 static btstack_timer_source_t usb_timer; 366 static int usb_timer_active; 367 368 // endpoint addresses 369 static int event_in_addr; 370 static int acl_in_addr; 371 static int acl_out_addr; 372 static int sco_in_addr; 373 static int sco_out_addr; 374 375 // device info 376 static int usb_path_len; 377 static uint8_t usb_path[USB_MAX_PATH_LEN]; 378 static uint16_t usb_vendor_id; 379 static uint16_t usb_product_id; 380 381 // transport interface state 382 static int usb_transport_open; 383 384 static void hci_transport_h2_libusb_emit_usb_info(void) { 385 uint8_t event[7 + USB_MAX_PATH_LEN]; 386 uint16_t pos = 0; 387 event[pos++] = HCI_EVENT_TRANSPORT_USB_INFO; 388 event[pos++] = 5 + usb_path_len; 389 little_endian_store_16(event, pos, usb_vendor_id); 390 pos+=2; 391 little_endian_store_16(event, pos, usb_product_id); 392 pos+=2; 393 event[pos++] = usb_path_len; 394 memcpy(&event[pos], usb_path, usb_path_len); 395 pos += usb_path_len; 396 (*packet_handler)(HCI_EVENT_PACKET, event, pos); 397 } 398 399 void hci_transport_usb_add_device(uint16_t vendor_id, uint16_t product_id) { 400 usb_known_device_t * device = malloc(sizeof(usb_known_device_t)); 401 if (device != NULL) { 402 device->vendor_id = vendor_id; 403 device->product_id = product_id; 404 btstack_linked_list_add(&usb_knwon_devices, (btstack_linked_item_t *) device); 405 } 406 } 407 408 void hci_transport_usb_set_path(int len, uint8_t * port_numbers){ 409 if (len > USB_MAX_PATH_LEN || !port_numbers){ 410 log_error("hci_transport_usb_set_path: len or port numbers invalid"); 411 return; 412 } 413 usb_path_len = len; 414 memcpy(usb_path, port_numbers, len); 415 } 416 417 LIBUSB_CALL static void async_callback(struct libusb_transfer *transfer) { 418 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) { 419 log_info("shutdown, transfer %p", transfer); 420 usb_transfer_list_free_entry( transfer ); 421 return; 422 } 423 424 int r; 425 // log_info("begin async_callback endpoint %x, status %x, actual length %u", transfer->endpoint, transfer->status, transfer->actual_length ); 426 427 if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { 428 enqueue_transfer(transfer); 429 } else if (transfer->status == LIBUSB_TRANSFER_STALL){ 430 log_info("-> Transfer stalled, trying again"); 431 r = libusb_clear_halt(handle, transfer->endpoint); 432 if (r) { 433 log_error("Error rclearing halt %d", r); 434 } 435 r = libusb_submit_transfer(transfer); 436 if (r) { 437 log_error("Error re-submitting transfer %d", r); 438 } 439 } else { 440 log_info("async_callback. not data -> resubmit transfer, endpoint %x, status %x, length %u", transfer->endpoint, transfer->status, transfer->actual_length); 441 // No usable data, just resubmit packet 442 r = libusb_submit_transfer(transfer); 443 if (r) { 444 log_error("Error re-submitting transfer %d", r); 445 } 446 } 447 // log_info("end async_callback"); 448 } 449 450 451 #ifdef ENABLE_SCO_OVER_HCI 452 static int usb_send_sco_packet(uint8_t *packet, int size){ 453 int r; 454 455 if( !sco_activated ) { 456 log_error("sco send without beeing active!"); 457 return -1; 458 } 459 460 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 461 462 struct libusb_transfer *transfer = usb_transfer_list_acquire( sco_transfer_list ); 463 uint8_t *data = transfer->buffer; 464 void *user_data = transfer->user_data; 465 466 // log_info("usb_send_acl_packet enter, size %u", size); 467 468 // store packet in free slot 469 memcpy(data, packet, size); 470 471 // setup transfer 472 // 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); 473 libusb_fill_iso_transfer(transfer, handle, sco_out_addr, data, NUM_ISO_PACKETS * iso_packet_size, NUM_ISO_PACKETS, async_callback, user_data, 0); 474 libusb_set_iso_packet_lengths(transfer, iso_packet_size); 475 r = libusb_submit_transfer(transfer); 476 if (r < 0) { 477 log_error("Error submitting sco transfer, %d", r); 478 return -1; 479 } 480 481 // log_info("H2: queued packet at index %u, num active %u", tranfer_index, sco_out_transfers_active); 482 signal_acknowledge(); 483 484 if( !usb_transfer_list_empty( sco_transfer_list ) ) { 485 signal_sco_can_send_now(); 486 } 487 488 return 0; 489 } 490 491 static void sco_state_machine_init(void){ 492 sco_state = H2_W4_SCO_HEADER; 493 sco_read_pos = 0; 494 sco_bytes_to_read = 3; 495 } 496 497 static void handle_isochronous_data(uint8_t * buffer, uint16_t size){ 498 while (size){ 499 if (size < sco_bytes_to_read){ 500 // just store incomplete data 501 memcpy(&sco_buffer[sco_read_pos], buffer, size); 502 sco_read_pos += size; 503 sco_bytes_to_read -= size; 504 return; 505 } 506 // copy requested data 507 memcpy(&sco_buffer[sco_read_pos], buffer, sco_bytes_to_read); 508 sco_read_pos += sco_bytes_to_read; 509 buffer += sco_bytes_to_read; 510 size -= sco_bytes_to_read; 511 512 // chunk read successfully, next action 513 switch (sco_state){ 514 case H2_W4_SCO_HEADER: 515 sco_state = H2_W4_PAYLOAD; 516 sco_bytes_to_read = sco_buffer[2]; 517 break; 518 case H2_W4_PAYLOAD: 519 // packet complete 520 packet_handler(HCI_SCO_DATA_PACKET, sco_buffer, sco_read_pos); 521 sco_state_machine_init(); 522 break; 523 default: 524 btstack_assert(false); 525 break; 526 } 527 } 528 } 529 #endif 530 531 static void handle_completed_transfer(struct libusb_transfer *transfer){ 532 533 int resubmit = 0; 534 assert(transfer->user_data != NULL ); 535 if (transfer->endpoint == event_in_addr) { 536 packet_handler(HCI_EVENT_PACKET, transfer->buffer, transfer->actual_length); 537 resubmit = 1; 538 } else if (transfer->endpoint == acl_in_addr) { 539 // log_info("-> acl"); 540 packet_handler(HCI_ACL_DATA_PACKET, transfer->buffer, transfer->actual_length); 541 resubmit = 1; 542 } else if (transfer->endpoint == 0){ 543 // log_info("command done, size %u", transfer->actual_length); 544 // printf("%s cmd release\n", __FUNCTION__ ); 545 usb_transfer_list_release( default_transfer_list, transfer ); 546 } else if (transfer->endpoint == acl_out_addr){ 547 // log_info("acl out done, size %u", transfer->actual_length); 548 // printf("%s acl release\n", __FUNCTION__ ); 549 usb_transfer_list_release( default_transfer_list, transfer ); 550 #ifdef ENABLE_SCO_OVER_HCI 551 } else if (transfer->endpoint == sco_in_addr) { 552 // log_info("handle_completed_transfer for SCO IN! num packets %u", transfer->NUM_ISO_PACKETS); 553 554 // give the transfer back to the pool, without resubmiting 555 if( !sco_activated ) { 556 usb_transfer_list_release( sco_transfer_list, transfer ); 557 return; 558 } 559 560 int i; 561 for (i = 0; i < transfer->num_iso_packets; i++) { 562 struct libusb_iso_packet_descriptor *pack = &transfer->iso_packet_desc[i]; 563 if (pack->status != LIBUSB_TRANSFER_COMPLETED) { 564 log_error("Error: pack %u status %d\n", i, pack->status); 565 continue; 566 } 567 if (!pack->actual_length) continue; 568 uint8_t * data = libusb_get_iso_packet_buffer_simple(transfer, i); 569 handle_isochronous_data(data, pack->actual_length); 570 } 571 resubmit = 1; 572 } else if (transfer->endpoint == sco_out_addr){ 573 int i; 574 for (i = 0; i < transfer->num_iso_packets; i++) { 575 struct libusb_iso_packet_descriptor *pack = &transfer->iso_packet_desc[i]; 576 if (pack->status != LIBUSB_TRANSFER_COMPLETED) { 577 log_error("Error: pack %u status %d\n", i, pack->status); 578 } 579 } 580 usb_transfer_list_release( sco_transfer_list, transfer ); 581 if( !sco_activated ) { 582 return; 583 } 584 // log_info("sco out done, {{ %u/%u (%x)}, { %u/%u (%x)}, { %u/%u (%x)}}", 585 // transfer->iso_packet_desc[0].actual_length, transfer->iso_packet_desc[0].length, transfer->iso_packet_desc[0].status, 586 // transfer->iso_packet_desc[1].actual_length, transfer->iso_packet_desc[1].length, transfer->iso_packet_desc[1].status, 587 // transfer->iso_packet_desc[2].actual_length, transfer->iso_packet_desc[2].length, transfer->iso_packet_desc[2].status); 588 // notify upper layer if there's space for new SCO packets 589 590 if (!usb_transfer_list_empty(sco_transfer_list)) { 591 signal_sco_can_send_now(); 592 } 593 // log_info("H2: sco out complete, num active num active %u", sco_out_transfers_active); 594 #endif 595 } else { 596 log_info("usb_process_ds endpoint unknown %x", transfer->endpoint); 597 } 598 599 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 600 601 if (resubmit){ 602 // Re-submit transfer 603 int r = libusb_submit_transfer(transfer); 604 if (r) { 605 log_error("Error re-submitting transfer %d", r); 606 } 607 } 608 } 609 610 void usb_handle_pending_events(void); 611 void usb_handle_pending_events(void) { 612 struct timeval tv = { 0 }; 613 libusb_handle_events_timeout_completed(NULL, &tv, NULL); 614 } 615 616 static void usb_process_ds(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 617 618 UNUSED(ds); 619 UNUSED(callback_type); 620 621 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 622 623 // log_info("begin usb_process_ds"); 624 // always handling an event as we're called when data is ready 625 usb_handle_pending_events(); 626 627 // Handle any packet in the order that they were received 628 while (!list_empty(&handle_packet_list)) { 629 // log_info("handle packet %p, endpoint %x, status %x", handle_packet, handle_packet->endpoint, handle_packet->status); 630 631 // pop next transfer 632 usb_transfer_list_entry_t *current = (usb_transfer_list_entry_t*)list_pop_front( &handle_packet_list ); 633 634 // handle transfer 635 handle_completed_transfer(current->t); 636 637 // handle case where libusb_close might be called by hci packet handler 638 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 639 } 640 // log_info("end usb_process_ds"); 641 } 642 643 static void usb_process_ts(btstack_timer_source_t *timer) { 644 645 UNUSED(timer); 646 647 // log_info("in usb_process_ts"); 648 649 // timer is deactive, when timer callback gets called 650 usb_timer_active = 0; 651 652 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return; 653 654 // actually handled the packet in the pollfds function 655 usb_process_ds((struct btstack_data_source *) NULL, DATA_SOURCE_CALLBACK_READ); 656 657 // Get the amount of time until next event is due 658 long msec = ASYNC_POLLING_INTERVAL_MS; 659 660 // Activate timer 661 btstack_run_loop_set_timer(&usb_timer, msec); 662 btstack_run_loop_add_timer(&usb_timer); 663 usb_timer_active = 1; 664 665 return; 666 } 667 668 669 static int scan_for_bt_endpoints(libusb_device *dev) { 670 int r; 671 672 event_in_addr = 0; 673 acl_in_addr = 0; 674 acl_out_addr = 0; 675 sco_out_addr = 0; 676 sco_in_addr = 0; 677 678 // get endpoints from interface descriptor 679 struct libusb_config_descriptor *config_descriptor; 680 r = libusb_get_active_config_descriptor(dev, &config_descriptor); 681 if (r < 0) return r; 682 683 int num_interfaces = config_descriptor->bNumInterfaces; 684 log_info("active configuration has %u interfaces", num_interfaces); 685 686 int i; 687 for (i = 0; i < num_interfaces ; i++){ 688 const struct libusb_interface *interface = &config_descriptor->interface[i]; 689 const struct libusb_interface_descriptor * interface_descriptor = interface->altsetting; 690 log_info("interface %u: %u endpoints", i, interface_descriptor->bNumEndpoints); 691 692 const struct libusb_endpoint_descriptor *endpoint = interface_descriptor->endpoint; 693 694 for (r=0;r<interface_descriptor->bNumEndpoints;r++,endpoint++){ 695 log_info("- endpoint %x, attributes %x", endpoint->bEndpointAddress, endpoint->bmAttributes); 696 697 switch (endpoint->bmAttributes & 0x3){ 698 case LIBUSB_TRANSFER_TYPE_INTERRUPT: 699 if (event_in_addr) continue; 700 event_in_addr = endpoint->bEndpointAddress; 701 log_info("-> using 0x%2.2X for HCI Events", event_in_addr); 702 break; 703 case LIBUSB_TRANSFER_TYPE_BULK: 704 if (endpoint->bEndpointAddress & 0x80) { 705 if (acl_in_addr) continue; 706 acl_in_addr = endpoint->bEndpointAddress; 707 log_info("-> using 0x%2.2X for ACL Data In", acl_in_addr); 708 } else { 709 if (acl_out_addr) continue; 710 acl_out_addr = endpoint->bEndpointAddress; 711 log_info("-> using 0x%2.2X for ACL Data Out", acl_out_addr); 712 } 713 break; 714 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: 715 if (endpoint->bEndpointAddress & 0x80) { 716 if (sco_in_addr) continue; 717 sco_in_addr = endpoint->bEndpointAddress; 718 log_info("-> using 0x%2.2X for SCO Data In", sco_in_addr); 719 } else { 720 if (sco_out_addr) continue; 721 sco_out_addr = endpoint->bEndpointAddress; 722 log_info("-> using 0x%2.2X for SCO Data Out", sco_out_addr); 723 } 724 break; 725 default: 726 break; 727 } 728 } 729 } 730 libusb_free_config_descriptor(config_descriptor); 731 return 0; 732 } 733 734 #ifndef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 735 736 // list of known devices, using VendorID/ProductID tuples 737 static const uint16_t known_bluetooth_devices[] = { 738 // BCM20702A0 - DeLOCK Bluetooth 4.0 739 0x0a5c, 0x21e8, 740 // BCM20702A0 - Asus BT400 741 0x0b05, 0x17cb, 742 // BCM20702B0 - Generic USB Detuned Class 1 @ 20 MHz 743 0x0a5c, 0x22be, 744 // nRF5x Zephyr USB HCI, e.g nRF52840-PCA10056 745 0x2fe3, 0x0100, 746 0x2fe3, 0x000b, 747 }; 748 749 static int num_known_devices = sizeof(known_bluetooth_devices) / sizeof(uint16_t) / 2; 750 751 static int is_known_bt_device(uint16_t vendor_id, uint16_t product_id){ 752 int i; 753 for (i=0; i<num_known_devices; i++){ 754 if (known_bluetooth_devices[i*2] == vendor_id && known_bluetooth_devices[i*2+1] == product_id){ 755 return 1; 756 } 757 } 758 btstack_linked_list_iterator_t it; 759 btstack_linked_list_iterator_init(&it, &usb_knwon_devices); 760 while (btstack_linked_list_iterator_has_next(&it)) { 761 usb_known_device_t * device = (usb_known_device_t *) btstack_linked_list_iterator_next(&it); 762 if (device->vendor_id != vendor_id) continue; 763 if (device->product_id != product_id) continue; 764 return 1; 765 } 766 return 0; 767 } 768 769 // returns index of found device or -1 770 static int scan_for_bt_device(libusb_device **devs, int start_index) { 771 int i; 772 for (i = start_index; devs[i] ; i++){ 773 libusb_device * dev = devs[i]; 774 int r = libusb_get_device_descriptor(dev, &desc); 775 if (r < 0) { 776 log_error("failed to get device descriptor"); 777 return 0; 778 } 779 780 log_info("%04x:%04x (bus %d, device %d) - class %x subclass %x protocol %x ", 781 desc.idVendor, desc.idProduct, 782 libusb_get_bus_number(dev), libusb_get_device_address(dev), 783 desc.bDeviceClass, desc.bDeviceSubClass, desc.bDeviceProtocol); 784 785 // Detect USB Dongle based Class, Subclass, and Protocol 786 // The class code (bDeviceClass) is 0xE0 – Wireless Controller. 787 // The SubClass code (bDeviceSubClass) is 0x01 – RF Controller. 788 // The Protocol code (bDeviceProtocol) is 0x01 – Bluetooth programming. 789 if (desc.bDeviceClass == 0xE0 && desc.bDeviceSubClass == 0x01 && desc.bDeviceProtocol == 0x01) { 790 return i; 791 } 792 793 // Detect USB Dongle based on whitelist 794 if (is_known_bt_device(desc.idVendor, desc.idProduct)) { 795 return i; 796 } 797 } 798 return -1; 799 } 800 #endif 801 802 static int prepare_device(libusb_device_handle * aHandle){ 803 804 // get device path 805 libusb_device * device = libusb_get_device(aHandle); 806 usb_path_len = libusb_get_port_numbers(device, usb_path, USB_MAX_PATH_LEN); 807 808 int r; 809 int kernel_driver_detached = 0; 810 811 // Detach OS driver (not possible for OS X, FreeBSD, and Windows) 812 #if !defined(__APPLE__) && !defined(_WIN32) && !defined(__CYGWIN__) && !defined(__FreeBSD__) 813 r = libusb_kernel_driver_active(aHandle, 0); 814 if (r < 0) { 815 log_error("libusb_kernel_driver_active error %d", r); 816 libusb_close(aHandle); 817 return r; 818 } 819 820 if (r == 1) { 821 r = libusb_detach_kernel_driver(aHandle, 0); 822 if (r < 0) { 823 log_error("libusb_detach_kernel_driver error %d", r); 824 libusb_close(aHandle); 825 return r; 826 } 827 kernel_driver_detached = 1; 828 } 829 log_info("libusb_detach_kernel_driver"); 830 #endif 831 832 const int configuration = 1; 833 log_info("setting configuration %d...", configuration); 834 r = libusb_set_configuration(aHandle, configuration); 835 if (r < 0) { 836 log_error("Error libusb_set_configuration: %d", r); 837 if (kernel_driver_detached){ 838 libusb_attach_kernel_driver(aHandle, 0); 839 } 840 libusb_close(aHandle); 841 return r; 842 } 843 844 // reserve access to device 845 log_info("claiming interface 0..."); 846 r = libusb_claim_interface(aHandle, 0); 847 if (r < 0) { 848 log_error("Error %d claiming interface 0", r); 849 if (kernel_driver_detached){ 850 libusb_attach_kernel_driver(aHandle, 0); 851 } 852 libusb_close(aHandle); 853 return r; 854 } 855 856 #ifdef ENABLE_SCO_OVER_HCI 857 // get endpoints from interface descriptor 858 struct libusb_config_descriptor *config_descriptor; 859 r = libusb_get_active_config_descriptor(device, &config_descriptor); 860 if (r >= 0){ 861 int num_interfaces = config_descriptor->bNumInterfaces; 862 if (num_interfaces > 1) { 863 r = libusb_claim_interface(aHandle, 1); 864 if (r < 0) { 865 log_error("Error %d claiming interface 1: - disabling SCO over HCI", r); 866 } else { 867 sco_enabled = 1; 868 } 869 } else { 870 log_info("Device has only on interface, disabling SCO over HCI"); 871 } 872 } 873 #endif 874 875 return 0; 876 } 877 878 static libusb_device_handle * try_open_device(libusb_device * device){ 879 int r; 880 881 r = libusb_get_device_descriptor(device, &desc); 882 if (r < 0) { 883 log_error("libusb_get_device_descriptor failed!"); 884 return NULL; 885 } 886 usb_vendor_id = desc.idVendor; 887 usb_product_id = desc.idProduct; 888 889 libusb_device_handle * dev_handle; 890 r = libusb_open(device, &dev_handle); 891 892 if (r < 0) { 893 log_error("libusb_open failed!"); 894 dev_handle = NULL; 895 return NULL; 896 } 897 898 log_info("libusb open %d, handle %p", r, dev_handle); 899 900 // reset device (Not currently possible under FreeBSD 11.x/12.x due to usb framework) 901 #if !defined(__FreeBSD__) 902 r = libusb_reset_device(dev_handle); 903 if (r < 0) { 904 log_error("libusb_reset_device failed!"); 905 libusb_close(dev_handle); 906 return NULL; 907 } 908 #endif 909 return dev_handle; 910 } 911 912 #ifdef ENABLE_SCO_OVER_HCI 913 static int usb_sco_start(void){ 914 915 log_info("usb_sco_start"); 916 if( sco_activated ) { 917 log_error("double sco start!"); 918 return -1; 919 } 920 sco_activated = true; 921 922 sco_state_machine_init(); 923 924 int alt_setting; 925 if (sco_voice_setting & 0x0020){ 926 // 16-bit PCM 927 alt_setting = alt_setting_16_bit[sco_num_connections-1]; 928 } else { 929 // 8-bit PCM or mSBC 930 alt_setting = alt_setting_8_bit[sco_num_connections-1]; 931 } 932 // derive iso packet size from alt setting 933 iso_packet_size = iso_packet_size_for_alt_setting[alt_setting]; 934 935 log_info("Switching to setting %u on interface 1..", alt_setting); 936 int r = libusb_set_interface_alt_setting(handle, 1, alt_setting); 937 if (r < 0) { 938 log_error("Error setting alternative setting %u for interface 1: %s\n", alt_setting, libusb_error_name(r)); 939 return r; 940 } 941 942 #ifdef DEBUG 943 int in_flight = usb_transfer_list_in_flight( sco_transfer_list ); 944 // there need to be at least SCO_IN_BUFFER_COUNT packets available to 945 // fill them in below 946 assert( in_flight <= SCO_OUT_BUFFER_COUNT ); 947 #endif 948 949 // incoming 950 int c; 951 for (c = 0 ; c < SCO_IN_BUFFER_COUNT ; c++) { 952 953 struct libusb_transfer *transfer = usb_transfer_list_acquire( sco_transfer_list ); 954 uint8_t *data = transfer->buffer; 955 void *user_data = transfer->user_data; 956 957 // configure sco_in handlers 958 libusb_fill_iso_transfer(transfer, handle, sco_in_addr, 959 data, NUM_ISO_PACKETS * iso_packet_size, NUM_ISO_PACKETS, async_callback, user_data, 0); 960 libusb_set_iso_packet_lengths(transfer, iso_packet_size); 961 r = libusb_submit_transfer(transfer); 962 if (r) { 963 log_error("Error submitting isochronous in transfer %d", r); 964 usb_close(); 965 return r; 966 } 967 } 968 return 0; 969 } 970 971 static void usb_sco_stop(void){ 972 973 log_info("usb_sco_stop"); 974 sco_activated = false; 975 976 usb_transfer_list_cancel( sco_transfer_list ); 977 978 log_info("Switching to setting %u on interface 1..", 0); 979 int r = libusb_set_interface_alt_setting(handle, 1, 0); 980 if (r < 0) { 981 log_error("Error setting alternative setting %u for interface 1: %s", 0, libusb_error_name(r)); 982 return; 983 } 984 985 log_info("usb_sco_stop done"); 986 } 987 #endif 988 989 void pollfd_added_cb(int fd, short events, void *user_data); 990 void pollfd_remove_cb(int fd, void *user_data); 991 992 void pollfd_added_cb(int fd, short events, void *user_data) { 993 UNUSED(events); 994 UNUSED(user_data); 995 log_error("add fd: %d", fd); 996 assert(0); 997 } 998 999 void pollfd_remove_cb(int fd, void *user_data) { 1000 UNUSED(user_data); 1001 log_error("remove fd: %d", fd); 1002 assert(0); 1003 } 1004 1005 static int usb_open(void){ 1006 int r; 1007 1008 if (usb_transport_open) return 0; 1009 1010 // default endpoint addresses 1011 event_in_addr = 0x81; // EP1, IN interrupt 1012 acl_in_addr = 0x82; // EP2, IN bulk 1013 acl_out_addr = 0x02; // EP2, OUT bulk 1014 sco_in_addr = 0x83; // EP3, IN isochronous 1015 sco_out_addr = 0x03; // EP3, OUT isochronous 1016 1017 // USB init 1018 r = libusb_init(NULL); 1019 if (r < 0) return -1; 1020 1021 libusb_state = LIB_USB_OPENED; 1022 1023 // configure debug level 1024 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_WARNING); 1025 1026 libusb_device * dev = NULL; 1027 1028 #ifdef HAVE_USB_VENDOR_ID_AND_PRODUCT_ID 1029 1030 // Use a specified device 1031 log_info("Want vend: %04x, prod: %04x", USB_VENDOR_ID, USB_PRODUCT_ID); 1032 handle = libusb_open_device_with_vid_pid(NULL, USB_VENDOR_ID, USB_PRODUCT_ID); 1033 1034 if (!handle){ 1035 log_error("libusb_open_device_with_vid_pid failed!"); 1036 usb_close(); 1037 return -1; 1038 } 1039 log_info("libusb open %d, handle %p", r, handle); 1040 1041 r = prepare_device(handle); 1042 if (r < 0){ 1043 usb_close(); 1044 return -1; 1045 } 1046 1047 dev = libusb_get_device(handle); 1048 r = scan_for_bt_endpoints(dev); 1049 if (r < 0){ 1050 usb_close(); 1051 return -1; 1052 } 1053 1054 usb_vendor_id = USB_VENDOR_ID; 1055 usb_product_id = USB_PRODUCT_ID; 1056 1057 #else 1058 // Scan system for an appropriate devices 1059 libusb_device **devs; 1060 ssize_t num_devices; 1061 1062 log_info("Scanning for USB Bluetooth device"); 1063 num_devices = libusb_get_device_list(NULL, &devs); 1064 if (num_devices < 0) { 1065 usb_close(); 1066 return -1; 1067 } 1068 1069 if (usb_path_len){ 1070 int i; 1071 for (i=0;i<num_devices;i++){ 1072 uint8_t port_numbers[USB_MAX_PATH_LEN]; 1073 int len = libusb_get_port_numbers(devs[i], port_numbers, USB_MAX_PATH_LEN); 1074 if (len != usb_path_len) continue; 1075 if (memcmp(usb_path, port_numbers, len) == 0){ 1076 log_info("USB device found at specified path"); 1077 handle = try_open_device(devs[i]); 1078 if (!handle) continue; 1079 1080 r = prepare_device(handle); 1081 if (r < 0) { 1082 handle = NULL; 1083 continue; 1084 } 1085 1086 dev = devs[i]; 1087 r = scan_for_bt_endpoints(dev); 1088 if (r < 0) { 1089 handle = NULL; 1090 continue; 1091 } 1092 1093 libusb_state = LIB_USB_INTERFACE_CLAIMED; 1094 break; 1095 }; 1096 } 1097 if (!handle){ 1098 log_error("USB device with given path not found"); 1099 return -1; 1100 } 1101 } else { 1102 1103 int deviceIndex = -1; 1104 while (true){ 1105 // look for next Bluetooth dongle 1106 deviceIndex = scan_for_bt_device(devs, deviceIndex+1); 1107 if (deviceIndex < 0) break; 1108 1109 log_info("USB Bluetooth device found, index %u", deviceIndex); 1110 1111 handle = try_open_device(devs[deviceIndex]); 1112 if (!handle) continue; 1113 1114 r = prepare_device(handle); 1115 if (r < 0) { 1116 handle = NULL; 1117 continue; 1118 } 1119 1120 dev = devs[deviceIndex]; 1121 r = scan_for_bt_endpoints(dev); 1122 if (r < 0) { 1123 handle = NULL; 1124 continue; 1125 } 1126 1127 libusb_state = LIB_USB_INTERFACE_CLAIMED; 1128 break; 1129 } 1130 } 1131 1132 libusb_free_device_list(devs, 1); 1133 1134 if (handle == 0){ 1135 log_error("No USB Bluetooth device found"); 1136 return -1; 1137 } 1138 1139 #endif 1140 1141 // allocate transfer handlers 1142 int c; 1143 1144 default_transfer_list = usb_transfer_list_alloc( 1145 EVENT_OUT_BUFFER_COUNT+EVENT_IN_BUFFER_COUNT+ACL_IN_BUFFER_COUNT, 1146 0, 1147 LIBUSB_CONTROL_SETUP_SIZE + HCI_INCOMING_PRE_BUFFER_SIZE + HCI_ACL_BUFFER_SIZE ); // biggest packet ever to expect 1148 1149 #ifdef ENABLE_SCO_OVER_HCI 1150 sco_transfer_list = usb_transfer_list_alloc( 1151 SCO_OUT_BUFFER_COUNT+SCO_IN_BUFFER_COUNT, 1152 NUM_ISO_PACKETS, 1153 SCO_PACKET_SIZE 1154 ); 1155 #endif 1156 1157 // TODO check for error 1158 1159 libusb_state = LIB_USB_TRANSFERS_ALLOCATED; 1160 1161 for (c = 0 ; c < EVENT_IN_BUFFER_COUNT ; c++) { 1162 struct libusb_transfer *transfer = usb_transfer_list_acquire( default_transfer_list ); 1163 uint8_t *data = transfer->buffer; 1164 void *user_data = transfer->user_data; 1165 // configure event_in handlers 1166 libusb_fill_interrupt_transfer(transfer, handle, event_in_addr, 1167 data, HCI_ACL_BUFFER_SIZE, async_callback, user_data, 0); 1168 r = libusb_submit_transfer(transfer); 1169 if (r) { 1170 log_error("Error submitting interrupt transfer %d", r); 1171 usb_close(); 1172 return r; 1173 } 1174 } 1175 1176 for (c = 0 ; c < ACL_IN_BUFFER_COUNT ; c++) { 1177 struct libusb_transfer *transfer = usb_transfer_list_acquire( default_transfer_list ); 1178 usb_transfer_list_entry_t *transfer_meta_data = (usb_transfer_list_entry_t*)transfer->user_data; 1179 uint8_t *data = transfer_meta_data->data; 1180 void *user_data = transfer->user_data; 1181 // configure acl_in handlers 1182 libusb_fill_bulk_transfer(transfer, handle, acl_in_addr, 1183 data + HCI_INCOMING_PRE_BUFFER_SIZE, HCI_ACL_BUFFER_SIZE, async_callback, user_data, 0) ; 1184 r = libusb_submit_transfer(transfer); 1185 if (r) { 1186 log_error("Error submitting bulk in transfer %d", r); 1187 usb_close(); 1188 return r; 1189 } 1190 1191 } 1192 1193 // Check for pollfds functionality 1194 doing_pollfds = libusb_pollfds_handle_timeouts(NULL); 1195 1196 libusb_set_pollfd_notifiers( NULL, pollfd_added_cb, pollfd_remove_cb, NULL ); 1197 1198 if (doing_pollfds) { 1199 log_info("Async using pollfds:"); 1200 1201 const struct libusb_pollfd ** pollfd = libusb_get_pollfds(NULL); 1202 for (num_pollfds = 0 ; pollfd[num_pollfds] ; num_pollfds++); 1203 pollfd_data_sources = (btstack_data_source_t *)malloc(sizeof(btstack_data_source_t) * num_pollfds); 1204 if (!pollfd_data_sources){ 1205 log_error("Cannot allocate data sources for pollfds"); 1206 usb_close(); 1207 return 1; 1208 } 1209 memset(pollfd_data_sources, 0, sizeof(btstack_data_source_t) * num_pollfds); 1210 for (r = 0 ; r < num_pollfds ; r++) { 1211 btstack_data_source_t *ds = &pollfd_data_sources[r]; 1212 btstack_run_loop_set_data_source_fd(ds, pollfd[r]->fd); 1213 btstack_run_loop_set_data_source_handler(ds, &usb_process_ds); 1214 if( pollfd[r]->events & POLLIN ) 1215 btstack_run_loop_enable_data_source_callbacks(ds, DATA_SOURCE_CALLBACK_READ); 1216 else 1217 btstack_run_loop_enable_data_source_callbacks(ds, DATA_SOURCE_CALLBACK_WRITE); 1218 btstack_run_loop_add_data_source(ds); 1219 log_info("%u: %p fd: %u, events %x", r, pollfd[r], pollfd[r]->fd, pollfd[r]->events); 1220 } 1221 libusb_free_pollfds(pollfd); 1222 } else { 1223 log_info("Async using timers:"); 1224 1225 usb_timer.process = usb_process_ts; 1226 btstack_run_loop_set_timer(&usb_timer, ASYNC_POLLING_INTERVAL_MS); 1227 btstack_run_loop_add_timer(&usb_timer); 1228 usb_timer_active = 1; 1229 } 1230 1231 usb_transport_open = 1; 1232 1233 hci_transport_h2_libusb_emit_usb_info(); 1234 1235 btstack_data_source_t *ds = &transport_response; 1236 btstack_run_loop_set_data_source_handler(ds, &usb_transport_response_ds); 1237 btstack_run_loop_enable_data_source_callbacks(ds, DATA_SOURCE_CALLBACK_POLL); 1238 btstack_run_loop_add_data_source(ds); 1239 return 0; 1240 } 1241 1242 static int usb_close(void) { 1243 if (!usb_transport_open) return 0; 1244 1245 log_info("usb_close"); 1246 1247 switch (libusb_state){ 1248 case LIB_USB_CLOSED: 1249 break; 1250 1251 case LIB_USB_TRANSFERS_ALLOCATED: 1252 libusb_state = LIB_USB_INTERFACE_CLAIMED; 1253 1254 if(usb_timer_active) { 1255 btstack_run_loop_remove_timer(&usb_timer); 1256 usb_timer_active = 0; 1257 } 1258 1259 if (doing_pollfds){ 1260 int r; 1261 for (r = 0 ; r < num_pollfds ; r++) { 1262 btstack_data_source_t *ds = &pollfd_data_sources[r]; 1263 btstack_run_loop_remove_data_source(ds); 1264 } 1265 free(pollfd_data_sources); 1266 pollfd_data_sources = NULL; 1267 num_pollfds = 0; 1268 doing_pollfds = 0; 1269 } 1270 1271 /* fall through */ 1272 1273 case LIB_USB_INTERFACE_CLAIMED: 1274 libusb_set_pollfd_notifiers( NULL, NULL, NULL, NULL ); 1275 usb_transfer_list_cancel( default_transfer_list ); 1276 #ifdef ENABLE_SCO_OVER_HCI 1277 usb_transfer_list_cancel( sco_transfer_list ); 1278 #endif 1279 1280 int in_flight_transfers = usb_transfer_list_in_flight( default_transfer_list ); 1281 #ifdef ENABLE_SCO_OVER_HCI 1282 in_flight_transfers += usb_transfer_list_in_flight( sco_transfer_list ); 1283 #endif 1284 while( in_flight_transfers > 0 ) { 1285 struct timeval tv = { 0 }; 1286 libusb_handle_events_timeout(NULL, &tv); 1287 1288 in_flight_transfers = usb_transfer_list_in_flight( default_transfer_list ); 1289 #ifdef ENABLE_SCO_OVER_HCI 1290 in_flight_transfers += usb_transfer_list_in_flight( sco_transfer_list ); 1291 #endif 1292 } 1293 1294 usb_transfer_list_free( default_transfer_list ); 1295 #ifdef ENABLE_SCO_OVER_HCI 1296 usb_transfer_list_free( sco_transfer_list ); 1297 sco_enabled = 0; 1298 #endif 1299 1300 // finally release interface 1301 libusb_release_interface(handle, 0); 1302 #ifdef ENABLE_SCO_OVER_HCI 1303 libusb_release_interface(handle, 1); 1304 #endif 1305 log_info("Libusb shutdown complete"); 1306 1307 /* fall through */ 1308 1309 case LIB_USB_DEVICE_OPENDED: 1310 libusb_close(handle); 1311 1312 /* fall through */ 1313 1314 case LIB_USB_OPENED: 1315 libusb_exit(NULL); 1316 break; 1317 1318 default: 1319 btstack_assert(false); 1320 break; 1321 } 1322 1323 libusb_state = LIB_USB_CLOSED; 1324 handle = NULL; 1325 usb_transport_open = 0; 1326 1327 return 0; 1328 } 1329 1330 static int acknowledge_count = 0; 1331 static void signal_acknowledge() { 1332 ++acknowledge_count; 1333 btstack_run_loop_poll_data_sources_from_irq(); 1334 } 1335 1336 static int sco_can_send_now_count = 0; 1337 static void signal_sco_can_send_now() { 1338 ++sco_can_send_now_count; 1339 btstack_run_loop_poll_data_sources_from_irq(); 1340 } 1341 1342 static void usb_transport_response_ds(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 1343 UNUSED(ds); 1344 UNUSED(callback_type); 1345 // printf("%s packet sent: %d sco can send now: %d\n", __FUNCTION__, acknowledge_count, sco_can_send_now_count); 1346 for(; acknowledge_count>0; --acknowledge_count) { 1347 static const uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0 }; 1348 packet_handler(HCI_EVENT_PACKET, (uint8_t*)&event[0], sizeof(event)); 1349 } 1350 1351 for(; sco_can_send_now_count>0; --sco_can_send_now_count) { 1352 static const uint8_t event[] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 1353 packet_handler(HCI_EVENT_PACKET, (uint8_t*)&event[0], sizeof(event)); 1354 } 1355 1356 } 1357 1358 static int usb_send_cmd_packet(uint8_t *packet, int size){ 1359 int r; 1360 1361 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 1362 // printf("%s( %p, %d )\n", __FUNCTION__, packet, size ); 1363 1364 struct libusb_transfer *transfer = usb_transfer_list_acquire( default_transfer_list ); 1365 uint8_t *data = transfer->buffer; 1366 void *user_data = transfer->user_data; 1367 1368 // async 1369 libusb_fill_control_setup(data, LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_RECIPIENT_INTERFACE, 0, 0, 0, size); 1370 memcpy(data + LIBUSB_CONTROL_SETUP_SIZE, packet, size); 1371 1372 // prepare transfer 1373 libusb_fill_control_transfer(transfer, handle, data, async_callback, user_data, 0); 1374 1375 // submit transfer 1376 assert( transfer->user_data != NULL ); 1377 r = libusb_submit_transfer(transfer); 1378 1379 if (r < 0) { 1380 log_error("Error submitting cmd transfer %d", r); 1381 return -1; 1382 } 1383 1384 signal_acknowledge(); 1385 1386 return 0; 1387 } 1388 1389 static int usb_send_acl_packet(uint8_t *packet, int size){ 1390 int r; 1391 1392 if (libusb_state != LIB_USB_TRANSFERS_ALLOCATED) return -1; 1393 // printf("%s( %p, %d )\n", __FUNCTION__, packet, size ); 1394 // log_info("usb_send_acl_packet enter, size %u", size); 1395 1396 struct libusb_transfer *transfer = usb_transfer_list_acquire( default_transfer_list ); 1397 uint8_t *data = transfer->buffer; 1398 1399 // prepare transfer 1400 memcpy( data, packet, size ); 1401 libusb_fill_bulk_transfer(transfer, handle, acl_out_addr, data, size, 1402 async_callback, transfer->user_data, 0); 1403 1404 assert( transfer->user_data != NULL ); 1405 r = libusb_submit_transfer(transfer); 1406 1407 if (r < 0) { 1408 log_error("Error submitting acl transfer, %d", r); 1409 return -1; 1410 } 1411 1412 signal_acknowledge(); 1413 1414 return 0; 1415 } 1416 1417 static int usb_can_send_packet_now(uint8_t packet_type){ 1418 switch (packet_type){ 1419 case HCI_COMMAND_DATA_PACKET: { 1420 int ret = !usb_transfer_list_empty( default_transfer_list ); 1421 if( !ret ) { 1422 log_error("command transfers shouldn't be empty!"); 1423 } 1424 return ret; 1425 } 1426 case HCI_ACL_DATA_PACKET: { 1427 int ret = !usb_transfer_list_empty( default_transfer_list ); 1428 if( !ret ) { 1429 log_error("acl transfers shouldn't be empty!"); 1430 } 1431 return ret; 1432 } 1433 1434 #ifdef ENABLE_SCO_OVER_HCI 1435 case HCI_SCO_DATA_PACKET: { 1436 if (!sco_enabled || !sco_activated) return 0; 1437 int ret = !usb_transfer_list_empty( sco_transfer_list ); 1438 if( !ret ) { 1439 log_error("sco transfers shouldn't be empty!"); 1440 } 1441 return ret; 1442 } 1443 #endif 1444 default: 1445 return 0; 1446 } 1447 } 1448 1449 static int usb_send_packet(uint8_t packet_type, uint8_t * packet, int size){ 1450 switch (packet_type){ 1451 case HCI_COMMAND_DATA_PACKET: 1452 return usb_send_cmd_packet(packet, size); 1453 case HCI_ACL_DATA_PACKET: 1454 return usb_send_acl_packet(packet, size); 1455 #ifdef ENABLE_SCO_OVER_HCI 1456 case HCI_SCO_DATA_PACKET: 1457 if (!sco_enabled) return -1; 1458 return usb_send_sco_packet(packet, size); 1459 #endif 1460 default: 1461 return -1; 1462 } 1463 } 1464 1465 #ifdef ENABLE_SCO_OVER_HCI 1466 static void usb_set_sco_config(uint16_t voice_setting, int num_connections){ 1467 if (!sco_enabled) return; 1468 1469 log_info("usb_set_sco_config: voice settings 0x%04x, num connections %u", voice_setting, num_connections); 1470 1471 if (num_connections != sco_num_connections){ 1472 sco_voice_setting = voice_setting; 1473 if (sco_num_connections){ 1474 usb_sco_stop(); 1475 } 1476 sco_num_connections = num_connections; 1477 if (num_connections){ 1478 usb_sco_start(); 1479 } 1480 } 1481 } 1482 #endif 1483 1484 static void usb_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1485 log_info("registering packet handler"); 1486 packet_handler = handler; 1487 } 1488 1489 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1490 UNUSED(packet_type); 1491 UNUSED(packet); 1492 UNUSED(size); 1493 } 1494 1495 // get usb singleton 1496 const hci_transport_t * hci_transport_usb_instance(void) { 1497 if (!hci_transport_usb) { 1498 hci_transport_usb = (hci_transport_t*) malloc( sizeof(hci_transport_t)); 1499 memset(hci_transport_usb, 0, sizeof(hci_transport_t)); 1500 hci_transport_usb->name = "H2_LIBUSB"; 1501 hci_transport_usb->open = usb_open; 1502 hci_transport_usb->close = usb_close; 1503 hci_transport_usb->register_packet_handler = usb_register_packet_handler; 1504 hci_transport_usb->can_send_packet_now = usb_can_send_packet_now; 1505 hci_transport_usb->send_packet = usb_send_packet; 1506 #ifdef ENABLE_SCO_OVER_HCI 1507 hci_transport_usb->set_sco_config = usb_set_sco_config; 1508 #endif 1509 } 1510 return hci_transport_usb; 1511 } 1512