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__ "hsp_hs.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Headset 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "bluetooth_sdp.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "classic/core.h" 58 #include "classic/sdp_server.h" 59 #include "classic/sdp_client_rfcomm.h" 60 #include "classic/sdp_util.h" 61 #include "classic/sdp_client.h" 62 #include "hci.h" 63 #include "hci_cmd.h" 64 #include "hci_dump.h" 65 #include "hsp_hs.h" 66 #include "l2cap.h" 67 68 #define HSP_AG_OK "OK" 69 #define HSP_AG_ERROR "ERROR" 70 #define HSP_AG_RING "RING" 71 #define HSP_MICROPHONE_GAIN "+VGM=" 72 #define HSP_SPEAKER_GAIN "+VGS=" 73 74 #define HSP_HS_AT_CKPD "AT+CKPD=200\r\n" 75 #define HSP_HS_MICROPHONE_GAIN "AT+VGM" 76 #define HSP_HS_SPEAKER_GAIN "AT+VGS" 77 78 static const char hsp_hs_default_service_name[] = "Headset"; 79 80 typedef enum { 81 HSP_IDLE, 82 HSP_W2_SEND_SDP_QUERY, 83 HSP_W4_SDP_QUERY_COMPLETE, 84 HSP_W4_RFCOMM_CONNECTED, 85 86 HSP_RFCOMM_CONNECTION_ESTABLISHED, 87 88 HSP_W2_CONNECT_SCO, 89 HSP_W4_SCO_CONNECTED, 90 91 HSP_AUDIO_CONNECTION_ESTABLISHED, 92 93 HSP_W2_DISCONNECT_SCO, 94 HSP_W4_SCO_DISCONNECTED, 95 96 HSP_W2_DISCONNECT_RFCOMM, 97 HSP_W4_RFCOMM_DISCONNECTED, 98 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 99 } hsp_state_t; 100 101 // higher-layer callbacks 102 static btstack_packet_handler_t hsp_hs_callback; 103 104 static bd_addr_t hsp_hs_remote; 105 static uint8_t hsp_hs_rfcomm_channel_nr; 106 static uint16_t hsp_hs_rfcomm_cid; 107 static uint16_t hsp_hs_rfcomm_mtu; 108 109 static hci_con_handle_t hsp_hs_sco_handle; 110 static hci_con_handle_t hsp_hs_rfcomm_handle; 111 112 static hsp_state_t hsp_state; 113 114 static int hsp_hs_microphone_gain; 115 static int hsp_hs_speaker_gain; 116 117 static uint8_t hsp_hs_send_button_press_triggered; 118 static uint8_t hsp_hs_wait_ok; 119 static uint8_t hsp_hs_accept_sco_connection; 120 121 static uint8_t hsp_hs_support_custom_indications; 122 static uint8_t hsp_hs_establish_audio_connection_triggered; 123 static uint8_t hsp_hs_release_audio_connection_triggered; 124 125 static uint16_t hsp_hs_sco_packet_types; 126 127 static btstack_packet_callback_registration_t hsp_hs_hci_event_callback_registration; 128 static btstack_context_callback_registration_t hsp_hs_handle_sdp_client_query_request; 129 130 #ifdef ENABLE_RTK_PCM_WBS 131 static bool hsp_hs_rtk_send_sco_config; 132 #endif 133 134 static void hsp_run(void); 135 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 136 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 137 138 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 139 btstack_assert(callback); 140 hsp_hs_callback = callback; 141 } 142 143 static void emit_event(uint8_t event_subtype){ 144 if (!hsp_hs_callback) return; 145 uint8_t event[5]; 146 event[0] = HCI_EVENT_HSP_META; 147 event[1] = sizeof(event) - 2; 148 event[2] = event_subtype; 149 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 150 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 151 } 152 153 static void emit_event_with_value(uint8_t event_subtype, uint8_t value){ 154 if (!hsp_hs_callback) return; 155 uint8_t event[6]; 156 event[0] = HCI_EVENT_HSP_META; 157 event[1] = sizeof(event) - 2; 158 event[2] = event_subtype; 159 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 160 event[5] = value; 161 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 162 } 163 164 static void emit_event_rfcomm_connected(uint8_t status){ 165 if (!hsp_hs_callback) return; 166 uint8_t event[12]; 167 event[0] = HCI_EVENT_HSP_META; 168 event[1] = sizeof(event) - 2; 169 event[2] = HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE; 170 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 171 event[5] = status; 172 reverse_bd_addr(hsp_hs_remote, &event[6]); 173 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 174 } 175 176 static void emit_event_audio_connected(uint8_t status, uint16_t sco_handle){ 177 if (!hsp_hs_callback) return; 178 uint8_t event[8]; 179 event[0] = HCI_EVENT_HSP_META; 180 event[1] = sizeof(event) - 2; 181 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 182 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 183 event[5] = status; 184 little_endian_store_16(event, 6, sco_handle); 185 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 186 } 187 188 static void emit_event_audio_disconnected(uint16_t sco_handle){ 189 if (!hsp_hs_callback) return; 190 uint8_t event[7]; 191 event[0] = HCI_EVENT_HSP_META; 192 event[1] = sizeof(event) - 2; 193 event[2] = HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE; 194 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 195 little_endian_store_16(event, 5, sco_handle); 196 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 197 } 198 199 200 // remote audio volume control 201 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 202 203 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 204 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) return 1; 205 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 206 if (err){ 207 log_info("rfcomm_send_internal -> error 0X%02x", err); 208 } 209 return err; 210 } 211 212 void hsp_hs_enable_custom_indications(int enable){ 213 hsp_hs_support_custom_indications = enable; 214 } 215 216 int hsp_hs_send_result(const char * result){ 217 if (!hsp_hs_support_custom_indications) return 1; 218 return hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, result); 219 } 220 221 222 void hsp_hs_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t have_remote_audio_control){ 223 uint8_t* attribute; 224 de_create_sequence(service); 225 226 // 0x0000 "Service Record Handle" 227 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 228 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 229 230 // 0x0001 "Service Class ID List" 231 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 232 attribute = de_push_sequence(service); 233 { 234 // see Bluetooth Erratum #3507 235 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 236 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 237 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 238 } 239 de_pop_sequence(service, attribute); 240 241 // 0x0004 "Protocol Descriptor List" 242 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 243 attribute = de_push_sequence(service); 244 { 245 uint8_t* l2cpProtocol = de_push_sequence(attribute); 246 { 247 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 248 } 249 de_pop_sequence(attribute, l2cpProtocol); 250 251 uint8_t* rfcomm = de_push_sequence(attribute); 252 { 253 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 254 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 255 } 256 de_pop_sequence(attribute, rfcomm); 257 } 258 de_pop_sequence(service, attribute); 259 260 // 0x0005 "Public Browse Group" 261 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 262 attribute = de_push_sequence(service); 263 { 264 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 265 } 266 de_pop_sequence(service, attribute); 267 268 // 0x0009 "Bluetooth Profile Descriptor List" 269 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 270 attribute = de_push_sequence(service); 271 { 272 uint8_t *hsp_profile = de_push_sequence(attribute); 273 { 274 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 275 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 276 } 277 de_pop_sequence(attribute, hsp_profile); 278 } 279 de_pop_sequence(service, attribute); 280 281 // 0x0100 "Service Name" 282 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 283 if (name){ 284 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 285 } else { 286 de_add_data(service, DE_STRING, strlen(hsp_hs_default_service_name), (uint8_t *) hsp_hs_default_service_name); 287 } 288 289 // Remote audio volume control 290 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 291 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 292 } 293 294 static void hsp_hs_reset_state(void){ 295 hsp_state = HSP_IDLE; 296 hsp_hs_microphone_gain = -1; 297 hsp_hs_speaker_gain = -1; 298 hsp_hs_rfcomm_cid = 0; 299 hsp_hs_rfcomm_channel_nr = 0; 300 hsp_hs_rfcomm_handle = HCI_CON_HANDLE_INVALID; 301 hsp_hs_sco_handle = HCI_CON_HANDLE_INVALID; 302 303 hsp_hs_send_button_press_triggered = 0; 304 hsp_hs_wait_ok = 0; 305 hsp_hs_support_custom_indications = 0; 306 307 hsp_hs_accept_sco_connection = 0; 308 hsp_hs_establish_audio_connection_triggered = 0; 309 hsp_hs_release_audio_connection_triggered = 0; 310 } 311 312 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 313 // register for HCI events 314 hsp_hs_hci_event_callback_registration.callback = &packet_handler; 315 hci_add_event_handler(&hsp_hs_hci_event_callback_registration); 316 317 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 318 319 hsp_hs_sco_packet_types = SCO_PACKET_TYPES_ALL; 320 hsp_hs_reset_state(); 321 } 322 323 void hsp_hs_deinit(void){ 324 hsp_hs_reset_state(); 325 hsp_hs_callback = NULL; 326 (void)memset(hsp_hs_remote, 0, 6); 327 (void)memset(&hsp_hs_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 328 (void)memset(&hsp_hs_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 329 } 330 331 static void hsp_hs_handle_start_sdp_client_query(void * context){ 332 UNUSED(context); 333 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 334 335 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 336 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(hsp_hs_remote), BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 337 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, hsp_hs_remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 338 } 339 340 void hsp_hs_connect(bd_addr_t bd_addr){ 341 if (hsp_state != HSP_IDLE) return; 342 343 (void)memcpy(hsp_hs_remote, bd_addr, 6); 344 hsp_state = HSP_W2_SEND_SDP_QUERY; 345 hsp_hs_handle_sdp_client_query_request.callback = &hsp_hs_handle_start_sdp_client_query; 346 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 347 (void) sdp_client_register_query_callback(&hsp_hs_handle_sdp_client_query_request); 348 } 349 350 void hsp_hs_disconnect(void){ 351 hsp_hs_release_audio_connection(); 352 353 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 354 hsp_state = HSP_IDLE; 355 return; 356 } 357 358 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 359 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 360 return; 361 } 362 363 hsp_hs_establish_audio_connection_triggered = 0; 364 rfcomm_disconnect(hsp_hs_rfcomm_cid); 365 } 366 367 368 void hsp_hs_establish_audio_connection(void){ 369 switch (hsp_state){ 370 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 371 hsp_hs_establish_audio_connection_triggered = 1; 372 hsp_state = HSP_W4_SCO_CONNECTED; 373 break; 374 case HSP_W4_RFCOMM_CONNECTED: 375 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 376 break; 377 default: 378 break; 379 } 380 hsp_run(); 381 } 382 383 void hsp_hs_release_audio_connection(void){ 384 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 385 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 386 hsp_hs_release_audio_connection_triggered = 1; 387 hsp_run(); 388 } 389 390 void hsp_hs_set_microphone_gain(uint8_t gain){ 391 if (gain >15) { 392 log_info("Gain must be in interval [0..15], it is given %d", gain); 393 return; 394 } 395 hsp_hs_microphone_gain = gain; 396 hsp_run(); 397 } 398 399 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 400 void hsp_hs_set_speaker_gain(uint8_t gain){ 401 if (gain >15) { 402 log_info("Gain must be in interval [0..15], it is given %d", gain); 403 return; 404 } 405 hsp_hs_speaker_gain = gain; 406 hsp_run(); 407 } 408 409 static void hsp_run_handle_state(void){ 410 switch (hsp_state){ 411 case HSP_AUDIO_CONNECTION_ESTABLISHED: 412 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 413 414 if (hsp_hs_microphone_gain >= 0){ 415 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 416 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 417 return; 418 } 419 char buffer[20]; 420 snprintf(buffer, sizeof(buffer), "%s=%d\r", 421 HSP_HS_MICROPHONE_GAIN, hsp_hs_microphone_gain); 422 buffer[sizeof(buffer) - 1] = 0; 423 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, buffer); 424 hsp_hs_microphone_gain = -1; 425 break; 426 } 427 428 if (hsp_hs_speaker_gain >= 0){ 429 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 430 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 431 return; 432 } 433 char buffer[20]; 434 snprintf(buffer, sizeof(buffer), "%s=%d\r", 435 HSP_HS_SPEAKER_GAIN, hsp_hs_speaker_gain); 436 buffer[sizeof(buffer) - 1] = 0; 437 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, buffer); 438 hsp_hs_speaker_gain = -1; 439 break; 440 } 441 break; 442 case HSP_W4_RFCOMM_DISCONNECTED: 443 rfcomm_disconnect(hsp_hs_rfcomm_cid); 444 break; 445 default: 446 break; 447 } 448 } 449 450 static void hsp_run(void){ 451 452 if (hsp_hs_wait_ok) return; 453 454 if (hsp_hs_accept_sco_connection && hci_can_send_command_packet_now()){ 455 456 bool eSCO = hsp_hs_accept_sco_connection == 2; 457 hsp_hs_accept_sco_connection = 0; 458 459 log_info("HSP: sending hci_accept_connection_request."); 460 461 // pick packet types based on SCO link type (SCO vs. eSCO) 462 uint16_t packet_types; 463 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(hsp_hs_rfcomm_handle)){ 464 packet_types = 0x3F8; 465 } else { 466 packet_types = 0x0007; 467 } 468 469 // packet type override 470 packet_types &= hsp_hs_sco_packet_types; 471 472 // bits 6-9 are 'don't use' 473 packet_types ^= 0x03c0; 474 475 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 476 477 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 478 hci_send_cmd(&hci_accept_synchronous_connection, hsp_hs_remote, 8000, 8000, 0xffff, sco_voice_setting, 0xff, packet_types); 479 return; 480 } 481 482 if (hsp_hs_release_audio_connection_triggered){ 483 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 484 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 485 return; 486 } 487 hsp_hs_release_audio_connection_triggered = 0; 488 hsp_hs_wait_ok = 1; 489 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 490 return; 491 } 492 493 if (hsp_hs_establish_audio_connection_triggered){ 494 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 495 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 496 return; 497 } 498 hsp_hs_establish_audio_connection_triggered = 0; 499 hsp_hs_wait_ok = 1; 500 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 501 return; 502 } 503 504 if (hsp_hs_send_button_press_triggered){ 505 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 506 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 507 return; 508 } 509 hsp_hs_send_button_press_triggered = 0; 510 hsp_hs_wait_ok = 1; 511 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 512 return; 513 } 514 515 #ifdef ENABLE_RTK_PCM_WBS 516 if (hsp_hs_rtk_send_sco_config){ 517 hsp_hs_rtk_send_sco_config = false; 518 log_info("RTK SCO: 16k + CVSD"); 519 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 520 return; 521 } 522 #endif 523 524 hsp_run_handle_state(); 525 } 526 527 528 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 529 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 530 if (packet_type == RFCOMM_DATA_PACKET){ 531 // skip over leading newline 532 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 533 size--; 534 packet++; 535 } 536 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 537 emit_event(HSP_SUBEVENT_RING); 538 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 539 hsp_hs_wait_ok = 0; 540 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 541 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 542 emit_event_with_value(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 543 544 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 545 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 546 emit_event_with_value(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 547 } else { 548 if (!hsp_hs_callback) return; 549 // strip trailing newline 550 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 551 size--; 552 } 553 // add trailing \0 554 packet[size] = 0; 555 // re-use incoming buffer to avoid reserving buffers/memcpy - ugly but efficient 556 uint8_t * event = packet - 6; 557 event[0] = HCI_EVENT_HSP_META; 558 event[1] = size + 4; 559 event[2] = HSP_SUBEVENT_AG_INDICATION; 560 little_endian_store_16(event, 3, hsp_hs_rfcomm_handle); 561 event[5] = size; 562 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+6); 563 } 564 hsp_run(); 565 return; 566 } 567 568 if (packet_type != HCI_EVENT_PACKET) return; 569 570 uint8_t event = hci_event_packet_get_type(packet); 571 bd_addr_t event_addr; 572 uint16_t handle; 573 uint8_t status; 574 575 switch (event) { 576 case HCI_EVENT_CONNECTION_REQUEST: 577 switch(hci_event_connection_request_get_link_type(packet)){ 578 case 0: // SCO 579 case 2: // eSCO 580 hci_event_connection_request_get_bd_addr(packet, event_addr); 581 if (bd_addr_cmp(event_addr, hsp_hs_remote) == 0){ 582 if (hci_event_connection_request_get_link_type(packet) == 2){ 583 hsp_hs_accept_sco_connection = 2; 584 } else { 585 hsp_hs_accept_sco_connection = 1; 586 } 587 log_info("hs_accept_sco_connection %u", hsp_hs_accept_sco_connection); 588 } 589 break; 590 default: 591 break; 592 } 593 break; 594 595 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 596 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 597 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 598 status = hci_event_synchronous_connection_complete_get_status(packet); 599 hsp_hs_sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 600 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 601 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 602 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 603 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 604 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 605 606 if (status != 0){ 607 log_error("(e)SCO Connection failed, status %u", status); 608 emit_event_audio_connected(status, hsp_hs_sco_handle); 609 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 610 break; 611 } 612 613 switch (link_type){ 614 case 0x00: 615 log_info("SCO Connection established."); 616 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 617 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 618 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 619 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 620 break; 621 case 0x02: 622 log_info("eSCO Connection established."); 623 break; 624 default: 625 log_error("(e)SCO reserved link_type 0x%2x", link_type); 626 break; 627 } 628 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 629 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", hsp_hs_sco_handle, 630 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 631 hci_event_synchronous_connection_complete_get_air_mode(packet)); 632 633 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 634 emit_event_audio_connected(status, hsp_hs_sco_handle); 635 break; 636 } 637 638 case RFCOMM_EVENT_INCOMING_CONNECTION: 639 if (hsp_state != HSP_IDLE) return; 640 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 641 hsp_hs_rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 642 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 643 hsp_state = HSP_W4_RFCOMM_CONNECTED; 644 rfcomm_accept_connection(hsp_hs_rfcomm_cid); 645 break; 646 647 case RFCOMM_EVENT_CHANNEL_OPENED: 648 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 649 status = rfcomm_event_channel_opened_get_status(packet); 650 if (status != ERROR_CODE_SUCCESS) { 651 log_info("RFCOMM channel open failed, status %u", status); 652 hsp_state = HSP_IDLE; 653 hsp_hs_reset_state(); 654 } else { 655 rfcomm_event_channel_opened_get_bd_addr(packet, hsp_hs_remote); 656 hsp_hs_rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 657 hsp_hs_rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 658 rfcomm_event_channel_opened_get_bd_addr(packet, hsp_hs_remote); 659 hsp_hs_rfcomm_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 660 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", hsp_hs_rfcomm_cid, hsp_hs_rfcomm_mtu, hsp_hs_rfcomm_handle); 661 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 662 #ifdef ENABLE_RTK_PCM_WBS 663 hsp_hs_rtk_send_sco_config = true; 664 #endif 665 } 666 emit_event_rfcomm_connected(status); 667 break; 668 669 case RFCOMM_EVENT_CAN_SEND_NOW: 670 hsp_run(); 671 break; 672 673 case HCI_EVENT_DISCONNECTION_COMPLETE: 674 handle = hci_event_disconnection_complete_get_connection_handle(packet); 675 if (handle == hsp_hs_sco_handle){ 676 hci_con_handle_t sco_handle = hsp_hs_sco_handle; 677 hsp_hs_sco_handle = HCI_CON_HANDLE_INVALID; 678 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 679 emit_event_audio_disconnected(sco_handle); 680 break; 681 } 682 break; 683 684 case RFCOMM_EVENT_CHANNEL_CLOSED: 685 hsp_state = HSP_IDLE; 686 hsp_hs_reset_state(); 687 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE); 688 break; 689 690 default: 691 break; 692 } 693 694 hsp_run(); 695 } 696 697 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 698 UNUSED(packet_type); // ok: handling own sdp events 699 UNUSED(channel); // ok: no channel 700 UNUSED(size); // ok: handling own sdp events 701 702 switch (hci_event_packet_get_type(packet)){ 703 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 704 hsp_hs_rfcomm_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 705 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), hsp_hs_rfcomm_channel_nr); 706 break; 707 case SDP_EVENT_QUERY_COMPLETE: 708 if (hsp_hs_rfcomm_channel_nr > 0){ 709 hsp_state = HSP_W4_RFCOMM_CONNECTED; 710 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(hsp_hs_remote), hsp_hs_rfcomm_channel_nr); 711 rfcomm_create_channel(packet_handler, hsp_hs_remote, hsp_hs_rfcomm_channel_nr, NULL); 712 break; 713 } 714 hsp_hs_reset_state(); 715 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 716 if (sdp_event_query_complete_get_status(packet)){ 717 emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, 718 sdp_event_query_complete_get_status(packet)); 719 } else { 720 emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 721 } 722 break; 723 default: 724 break; 725 } 726 } 727 728 void hsp_hs_send_button_press(void){ 729 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 730 hsp_hs_send_button_press_triggered = 1; 731 hsp_run(); 732 } 733 734 void hsp_hs_set_sco_packet_types(uint16_t packet_types){ 735 hsp_hs_sco_packet_types = packet_types; 736 } 737