The Android Open Source Project | 5738f83 | 2012-12-12 16:00:35 -0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright (C) 2009-2012 Broadcom Corporation |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at: |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | * |
| 17 | ******************************************************************************/ |
| 18 | |
| 19 | /***************************************************************************** |
| 20 | * |
| 21 | * Filename: uipc.c |
| 22 | * |
| 23 | * Description: UIPC implementation for bluedroid |
| 24 | * |
| 25 | *****************************************************************************/ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <string.h> |
| 29 | #include <stdlib.h> |
| 30 | |
| 31 | #include <sys/stat.h> |
| 32 | #include <unistd.h> |
| 33 | #include <fcntl.h> |
| 34 | |
| 35 | #include <sys/socket.h> |
| 36 | #include <sys/un.h> |
| 37 | #include <signal.h> |
| 38 | #include <errno.h> |
| 39 | #include <pthread.h> |
| 40 | #include <sys/select.h> |
| 41 | #include <sys/poll.h> |
| 42 | #include <sys/mman.h> |
| 43 | #include <sys/stat.h> |
| 44 | #include <sys/prctl.h> |
| 45 | |
| 46 | |
| 47 | #include "gki.h" |
| 48 | #include "data_types.h" |
| 49 | #include "uipc.h" |
| 50 | |
| 51 | #include <cutils/sockets.h> |
| 52 | #include "audio_a2dp_hw.h" |
| 53 | |
| 54 | /***************************************************************************** |
| 55 | ** Constants & Macros |
| 56 | ******************************************************************************/ |
| 57 | |
| 58 | #define PCM_FILENAME "/data/test.pcm" |
| 59 | |
| 60 | #define MAX(a,b) ((a)>(b)?(a):(b)) |
| 61 | |
| 62 | #define CASE_RETURN_STR(const) case const: return #const; |
| 63 | |
| 64 | #define UIPC_DISCONNECTED (-1) |
| 65 | |
| 66 | #define UIPC_LOCK() /*BTIF_TRACE_EVENT1(" %s lock", __FUNCTION__);*/ pthread_mutex_lock(&uipc_main.mutex); |
| 67 | #define UIPC_UNLOCK() /*BTIF_TRACE_EVENT1("%s unlock", __FUNCTION__);*/ pthread_mutex_unlock(&uipc_main.mutex); |
| 68 | |
| 69 | /***************************************************************************** |
| 70 | ** Local type definitions |
| 71 | ******************************************************************************/ |
| 72 | |
| 73 | typedef enum { |
| 74 | UIPC_TASK_FLAG_DISCONNECT_CHAN = 0x1, |
| 75 | } tUIPC_TASK_FLAGS; |
| 76 | |
| 77 | typedef struct { |
| 78 | int srvfd; |
| 79 | int fd; |
| 80 | int read_poll_tmo_ms; |
| 81 | int task_evt_flags; /* event flags pending to be processed in read task */ |
| 82 | tUIPC_EVENT cond_flags; |
| 83 | pthread_mutex_t cond_mutex; |
| 84 | pthread_cond_t cond; |
| 85 | tUIPC_RCV_CBACK *cback; |
| 86 | } tUIPC_CHAN; |
| 87 | |
| 88 | typedef struct { |
| 89 | pthread_t tid; /* main thread id */ |
| 90 | int running; |
| 91 | pthread_mutex_t mutex; |
| 92 | |
| 93 | fd_set active_set; |
| 94 | fd_set read_set; |
| 95 | int max_fd; |
| 96 | int signal_fds[2]; |
| 97 | |
| 98 | tUIPC_CHAN ch[UIPC_CH_NUM]; |
| 99 | } tUIPC_MAIN; |
| 100 | |
| 101 | |
| 102 | /***************************************************************************** |
| 103 | ** Static variables |
| 104 | ******************************************************************************/ |
| 105 | |
| 106 | static tUIPC_MAIN uipc_main; |
| 107 | |
| 108 | |
| 109 | /***************************************************************************** |
| 110 | ** Static functions |
| 111 | ******************************************************************************/ |
| 112 | |
| 113 | static int uipc_close_ch_locked(tUIPC_CH_ID ch_id); |
| 114 | |
| 115 | /***************************************************************************** |
| 116 | ** Externs |
| 117 | ******************************************************************************/ |
| 118 | |
| 119 | |
| 120 | /***************************************************************************** |
| 121 | ** Helper functions |
| 122 | ******************************************************************************/ |
| 123 | |
| 124 | |
| 125 | const char* dump_uipc_event(tUIPC_EVENT event) |
| 126 | { |
| 127 | switch(event) |
| 128 | { |
| 129 | CASE_RETURN_STR(UIPC_OPEN_EVT) |
| 130 | CASE_RETURN_STR(UIPC_CLOSE_EVT) |
| 131 | CASE_RETURN_STR(UIPC_RX_DATA_EVT) |
| 132 | CASE_RETURN_STR(UIPC_RX_DATA_READY_EVT) |
| 133 | CASE_RETURN_STR(UIPC_TX_DATA_READY_EVT) |
| 134 | default: |
| 135 | return "UNKNOWN MSG ID"; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /***************************************************************************** |
| 140 | ** |
| 141 | ** Function |
| 142 | ** |
| 143 | ** Description |
| 144 | ** |
| 145 | ** Returns |
| 146 | ** |
| 147 | *******************************************************************************/ |
| 148 | |
| 149 | static void uipc_wait(tUIPC_CH_ID ch_id, tUIPC_EVENT wait_event_flags) |
| 150 | { |
| 151 | int ret; |
| 152 | tUIPC_CHAN *p = &uipc_main.ch[ch_id]; |
| 153 | |
| 154 | //BTIF_TRACE_EVENT2("WAIT UIPC CH %d EVT %x BEGIN", ch_id, wait_event_flags); |
| 155 | pthread_mutex_lock(&p->cond_mutex); |
| 156 | p->cond_flags |= wait_event_flags; |
| 157 | ret = pthread_cond_wait(&p->cond, &p->cond_mutex); |
| 158 | pthread_mutex_unlock(&p->cond_mutex); |
| 159 | //BTIF_TRACE_EVENT2("WAIT UIPC CH %d EVT %x DONE", ch_id, wait_event_flags); |
| 160 | } |
| 161 | |
| 162 | static void uipc_signal(tUIPC_CH_ID ch_id, tUIPC_EVENT event) |
| 163 | { |
| 164 | int ret; |
| 165 | tUIPC_CHAN *p = &uipc_main.ch[ch_id]; |
| 166 | |
| 167 | //BTIF_TRACE_EVENT2("SIGNAL UIPC CH %d EVT %x BEGIN", ch_id, dump_uipc_event(event)); |
| 168 | pthread_mutex_lock(&p->cond_mutex); |
| 169 | |
| 170 | if (event & p->cond_flags) |
| 171 | { |
| 172 | //BTIF_TRACE_EVENT0("UNBLOCK"); |
| 173 | ret = pthread_cond_signal(&p->cond); |
| 174 | p->cond_flags = 0; |
| 175 | } |
| 176 | |
| 177 | pthread_mutex_unlock(&p->cond_mutex); |
| 178 | } |
| 179 | |
| 180 | |
| 181 | |
| 182 | /***************************************************************************** |
| 183 | ** socket helper functions |
| 184 | *****************************************************************************/ |
| 185 | |
| 186 | static inline int create_server_socket(const char* name) |
| 187 | { |
| 188 | int s = socket(AF_LOCAL, SOCK_STREAM, 0); |
| 189 | |
| 190 | BTIF_TRACE_EVENT1("create_server_socket %s", name); |
| 191 | |
| 192 | if(socket_local_server_bind(s, name, ANDROID_SOCKET_NAMESPACE_ABSTRACT) < 0) |
| 193 | { |
| 194 | BTIF_TRACE_EVENT1("socket failed to create (%s)", strerror(errno)); |
| 195 | return -1; |
| 196 | } |
| 197 | |
| 198 | if(listen(s, 5) < 0) |
| 199 | { |
| 200 | BTIF_TRACE_EVENT1("listen failed", strerror(errno)); |
| 201 | close(s); |
| 202 | return -1; |
| 203 | } |
| 204 | |
| 205 | BTIF_TRACE_EVENT1("created socket fd %d", s); |
| 206 | return s; |
| 207 | } |
| 208 | |
| 209 | static int accept_server_socket(int sfd) |
| 210 | { |
| 211 | struct sockaddr_un remote; |
| 212 | struct pollfd pfd; |
| 213 | int fd; |
| 214 | int len = sizeof(struct sockaddr_un); |
| 215 | |
| 216 | BTIF_TRACE_EVENT1("accept fd %d", sfd); |
| 217 | |
| 218 | /* make sure there is data to process */ |
| 219 | pfd.fd = sfd; |
| 220 | pfd.events = POLLIN; |
| 221 | |
| 222 | if (poll(&pfd, 1, 0) == 0) |
| 223 | { |
| 224 | BTIF_TRACE_EVENT0("accept poll timeout"); |
| 225 | return -1; |
| 226 | } |
| 227 | |
| 228 | //BTIF_TRACE_EVENT1("poll revents 0x%x", pfd.revents); |
| 229 | |
| 230 | if ((fd = accept(sfd, (struct sockaddr *)&remote, &len)) == -1) |
| 231 | { |
| 232 | BTIF_TRACE_ERROR1("sock accept failed (%s)", strerror(errno)); |
| 233 | return -1; |
| 234 | } |
| 235 | |
| 236 | //BTIF_TRACE_EVENT1("new fd %d", fd); |
| 237 | |
| 238 | return fd; |
| 239 | } |
| 240 | |
| 241 | /***************************************************************************** |
| 242 | ** |
| 243 | ** uipc helper functions |
| 244 | ** |
| 245 | *****************************************************************************/ |
| 246 | |
| 247 | static int uipc_main_init(void) |
| 248 | { |
| 249 | int i; |
| 250 | const pthread_mutexattr_t attr = PTHREAD_MUTEX_RECURSIVE; |
| 251 | pthread_mutex_init(&uipc_main.mutex, &attr); |
| 252 | |
| 253 | BTIF_TRACE_EVENT0("### uipc_main_init ###"); |
| 254 | |
| 255 | /* setup interrupt socket pair */ |
| 256 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, uipc_main.signal_fds) < 0) |
| 257 | { |
| 258 | return -1; |
| 259 | } |
| 260 | |
| 261 | FD_SET(uipc_main.signal_fds[0], &uipc_main.active_set); |
| 262 | uipc_main.max_fd = MAX(uipc_main.max_fd, uipc_main.signal_fds[0]); |
| 263 | |
| 264 | for (i=0; i< UIPC_CH_NUM; i++) |
| 265 | { |
| 266 | tUIPC_CHAN *p = &uipc_main.ch[i]; |
| 267 | p->srvfd = UIPC_DISCONNECTED; |
| 268 | p->fd = UIPC_DISCONNECTED; |
| 269 | p->task_evt_flags = 0; |
| 270 | pthread_cond_init(&p->cond, NULL); |
| 271 | pthread_mutex_init(&p->cond_mutex, NULL); |
| 272 | p->cback = NULL; |
| 273 | } |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | void uipc_main_cleanup(void) |
| 279 | { |
| 280 | int i; |
| 281 | |
| 282 | BTIF_TRACE_EVENT0("uipc_main_cleanup"); |
| 283 | |
| 284 | close(uipc_main.signal_fds[0]); |
| 285 | close(uipc_main.signal_fds[1]); |
| 286 | |
| 287 | /* close any open channels */ |
| 288 | for (i=0; i<UIPC_CH_NUM; i++) |
| 289 | uipc_close_ch_locked(i); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | |
| 294 | /* check pending events in read task */ |
| 295 | static void uipc_check_task_flags_locked(void) |
| 296 | { |
| 297 | int i; |
| 298 | |
| 299 | for (i=0; i<UIPC_CH_NUM; i++) |
| 300 | { |
| 301 | //BTIF_TRACE_EVENT2("CHECK TASK FLAGS %x %x", uipc_main.ch[i].task_evt_flags, UIPC_TASK_FLAG_DISCONNECT_CHAN); |
| 302 | if (uipc_main.ch[i].task_evt_flags & UIPC_TASK_FLAG_DISCONNECT_CHAN) |
| 303 | { |
| 304 | uipc_main.ch[i].task_evt_flags &= ~UIPC_TASK_FLAG_DISCONNECT_CHAN; |
| 305 | uipc_close_ch_locked(i); |
| 306 | } |
| 307 | |
| 308 | /* add here */ |
| 309 | |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | |
| 314 | static int uipc_check_fd_locked(tUIPC_CH_ID ch_id) |
| 315 | { |
| 316 | if (ch_id >= UIPC_CH_NUM) |
| 317 | return -1; |
| 318 | |
| 319 | //BTIF_TRACE_EVENT2("CHECK SRVFD %d (ch %d)", uipc_main.ch[ch_id].srvfd, ch_id); |
| 320 | |
| 321 | if (FD_ISSET(uipc_main.ch[ch_id].srvfd, &uipc_main.read_set)) |
| 322 | { |
| 323 | BTIF_TRACE_EVENT1("INCOMING CONNECTION ON CH %d", ch_id); |
| 324 | |
| 325 | uipc_main.ch[ch_id].fd = accept_server_socket(uipc_main.ch[ch_id].srvfd); |
| 326 | |
| 327 | BTIF_TRACE_EVENT1("NEW FD %d", uipc_main.ch[ch_id].fd); |
| 328 | |
| 329 | if ((uipc_main.ch[ch_id].fd > 0) && uipc_main.ch[ch_id].cback) |
| 330 | { |
| 331 | /* if we have a callback we should add this fd to the active set |
| 332 | and notify user with callback event */ |
| 333 | BTIF_TRACE_EVENT1("ADD FD %d TO ACTIVE SET", uipc_main.ch[ch_id].fd); |
| 334 | FD_SET(uipc_main.ch[ch_id].fd, &uipc_main.active_set); |
| 335 | uipc_main.max_fd = MAX(uipc_main.max_fd, uipc_main.ch[ch_id].fd); |
| 336 | } |
| 337 | |
| 338 | if (uipc_main.ch[ch_id].fd < 0) |
| 339 | { |
| 340 | BTIF_TRACE_ERROR2("FAILED TO ACCEPT CH %d (%s)", ch_id, strerror(errno)); |
| 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | if (uipc_main.ch[ch_id].cback) |
| 345 | uipc_main.ch[ch_id].cback(ch_id, UIPC_OPEN_EVT); |
| 346 | } |
| 347 | |
| 348 | //BTIF_TRACE_EVENT2("CHECK FD %d (ch %d)", uipc_main.ch[ch_id].fd, ch_id); |
| 349 | |
| 350 | if (FD_ISSET(uipc_main.ch[ch_id].fd, &uipc_main.read_set)) |
| 351 | { |
| 352 | //BTIF_TRACE_EVENT1("INCOMING DATA ON CH %d", ch_id); |
| 353 | |
| 354 | if (uipc_main.ch[ch_id].cback) |
| 355 | uipc_main.ch[ch_id].cback(ch_id, UIPC_RX_DATA_READY_EVT); |
| 356 | } |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | static void uipc_check_interrupt_locked(void) |
| 361 | { |
| 362 | if (FD_ISSET(uipc_main.signal_fds[0], &uipc_main.read_set)) |
| 363 | { |
| 364 | char sig_recv = 0; |
| 365 | //BTIF_TRACE_EVENT0("UIPC INTERRUPT"); |
| 366 | recv(uipc_main.signal_fds[0], &sig_recv, sizeof(sig_recv), MSG_WAITALL); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | static inline void uipc_wakeup_locked(void) |
| 371 | { |
| 372 | char sig_on = 1; |
| 373 | BTIF_TRACE_EVENT0("UIPC SEND WAKE UP"); |
| 374 | send(uipc_main.signal_fds[1], &sig_on, sizeof(sig_on), 0); |
| 375 | } |
| 376 | |
| 377 | static int uipc_setup_server_locked(tUIPC_CH_ID ch_id, char *name, tUIPC_RCV_CBACK *cback) |
| 378 | { |
| 379 | int fd; |
| 380 | |
| 381 | BTIF_TRACE_EVENT1("SETUP CHANNEL SERVER %d", ch_id); |
| 382 | |
| 383 | if (ch_id >= UIPC_CH_NUM) |
| 384 | return -1; |
| 385 | |
| 386 | UIPC_LOCK(); |
| 387 | |
| 388 | fd = create_server_socket(name); |
| 389 | |
| 390 | if (fd < 0) |
| 391 | { |
| 392 | BTIF_TRACE_ERROR2("failed to setup %s", name, strerror(errno)); |
| 393 | UIPC_UNLOCK(); |
| 394 | return -1; |
| 395 | } |
| 396 | |
| 397 | BTIF_TRACE_EVENT1("ADD SERVER FD TO ACTIVE SET %d", fd); |
| 398 | FD_SET(fd, &uipc_main.active_set); |
| 399 | uipc_main.max_fd = MAX(uipc_main.max_fd, fd); |
| 400 | |
| 401 | uipc_main.ch[ch_id].srvfd = fd; |
| 402 | uipc_main.ch[ch_id].cback = cback; |
| 403 | uipc_main.ch[ch_id].read_poll_tmo_ms = DEFAULT_READ_POLL_TMO_MS; |
| 404 | |
| 405 | /* trigger main thread to update read set */ |
| 406 | uipc_wakeup_locked(); |
| 407 | |
| 408 | UIPC_UNLOCK(); |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static void uipc_flush_ch_locked(tUIPC_CH_ID ch_id) |
| 414 | { |
| 415 | char buf; |
| 416 | struct pollfd pfd; |
| 417 | int ret; |
| 418 | |
| 419 | pfd.events = POLLIN|POLLHUP; |
| 420 | pfd.fd = uipc_main.ch[ch_id].fd; |
| 421 | |
| 422 | if (uipc_main.ch[ch_id].fd == UIPC_DISCONNECTED) |
| 423 | return; |
| 424 | |
| 425 | while (1) |
| 426 | { |
| 427 | ret = poll(&pfd, 1, 1); |
| 428 | BTIF_TRACE_EVENT3("uipc_flush_ch_locked polling : fd %d, rxev %x, ret %d", pfd.fd, pfd.revents, ret); |
| 429 | |
| 430 | if (pfd.revents | (POLLERR|POLLHUP)) |
| 431 | return; |
| 432 | |
| 433 | if (ret <= 0) |
| 434 | { |
| 435 | BTIF_TRACE_EVENT1("uipc_flush_ch_locked : error (%d)", ret); |
| 436 | return; |
| 437 | } |
| 438 | read(pfd.fd, &buf, 1); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | |
| 443 | static void uipc_flush_locked(tUIPC_CH_ID ch_id) |
| 444 | { |
| 445 | if (ch_id >= UIPC_CH_NUM) |
| 446 | return; |
| 447 | |
| 448 | switch(ch_id) |
| 449 | { |
| 450 | case UIPC_CH_ID_AV_CTRL: |
| 451 | uipc_flush_ch_locked(UIPC_CH_ID_AV_CTRL); |
| 452 | break; |
| 453 | |
| 454 | case UIPC_CH_ID_AV_AUDIO: |
| 455 | uipc_flush_ch_locked(UIPC_CH_ID_AV_AUDIO); |
| 456 | break; |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | |
| 461 | static int uipc_close_ch_locked(tUIPC_CH_ID ch_id) |
| 462 | { |
| 463 | int wakeup = 0; |
| 464 | |
| 465 | BTIF_TRACE_EVENT1("CLOSE CHANNEL %d", ch_id); |
| 466 | |
| 467 | if (ch_id >= UIPC_CH_NUM) |
| 468 | return -1; |
| 469 | |
| 470 | if (uipc_main.ch[ch_id].srvfd != UIPC_DISCONNECTED) |
| 471 | { |
| 472 | BTIF_TRACE_EVENT1("CLOSE SERVER (FD %d)", uipc_main.ch[ch_id].srvfd); |
| 473 | close(uipc_main.ch[ch_id].srvfd); |
| 474 | FD_CLR(uipc_main.ch[ch_id].srvfd, &uipc_main.active_set); |
| 475 | uipc_main.ch[ch_id].srvfd = UIPC_DISCONNECTED; |
| 476 | wakeup = 1; |
| 477 | } |
| 478 | |
| 479 | if (uipc_main.ch[ch_id].fd != UIPC_DISCONNECTED) |
| 480 | { |
| 481 | BTIF_TRACE_EVENT1("CLOSE CONNECTION (FD %d)", uipc_main.ch[ch_id].fd); |
| 482 | close(uipc_main.ch[ch_id].fd); |
| 483 | FD_CLR(uipc_main.ch[ch_id].fd, &uipc_main.active_set); |
| 484 | uipc_main.ch[ch_id].fd = UIPC_DISCONNECTED; |
| 485 | wakeup = 1; |
| 486 | } |
| 487 | |
| 488 | /* notify this connection is closed */ |
| 489 | if (uipc_main.ch[ch_id].cback) |
| 490 | uipc_main.ch[ch_id].cback(ch_id, UIPC_CLOSE_EVT); |
| 491 | |
| 492 | /* trigger main thread update if something was updated */ |
| 493 | if (wakeup) |
| 494 | uipc_wakeup_locked(); |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | |
| 500 | void uipc_close_locked(tUIPC_CH_ID ch_id) |
| 501 | { |
| 502 | if (uipc_main.ch[ch_id].srvfd == UIPC_DISCONNECTED) |
| 503 | { |
| 504 | BTIF_TRACE_EVENT1("CHANNEL %d ALREADY CLOSED", ch_id); |
| 505 | return; |
| 506 | } |
| 507 | |
| 508 | /* schedule close on this channel */ |
| 509 | uipc_main.ch[ch_id].task_evt_flags |= UIPC_TASK_FLAG_DISCONNECT_CHAN; |
| 510 | uipc_wakeup_locked(); |
| 511 | } |
| 512 | |
| 513 | |
| 514 | static void uipc_read_task(void *arg) |
| 515 | { |
| 516 | int ch_id; |
| 517 | int result; |
| 518 | |
| 519 | prctl(PR_SET_NAME, (unsigned long)"uipc-main", 0, 0, 0); |
| 520 | |
| 521 | while (uipc_main.running) |
| 522 | { |
| 523 | uipc_main.read_set = uipc_main.active_set; |
| 524 | |
| 525 | result = select(uipc_main.max_fd+1, &uipc_main.read_set, NULL, NULL, NULL); |
| 526 | |
| 527 | if (result == 0) |
| 528 | { |
| 529 | BTIF_TRACE_EVENT0("select timeout"); |
| 530 | continue; |
| 531 | } |
| 532 | else if (result < 0) |
| 533 | { |
| 534 | BTIF_TRACE_EVENT1("select failed %s", strerror(errno)); |
| 535 | continue; |
| 536 | } |
| 537 | |
| 538 | UIPC_LOCK(); |
| 539 | |
| 540 | /* clear any wakeup interrupt */ |
| 541 | uipc_check_interrupt_locked(); |
| 542 | |
| 543 | /* check pending task events */ |
| 544 | uipc_check_task_flags_locked(); |
| 545 | |
| 546 | /* make sure we service audio channel first */ |
| 547 | uipc_check_fd_locked(UIPC_CH_ID_AV_AUDIO); |
| 548 | |
| 549 | /* check for other connections */ |
| 550 | for (ch_id = 0; ch_id < UIPC_CH_NUM; ch_id++) |
| 551 | { |
| 552 | if (ch_id != UIPC_CH_ID_AV_AUDIO) |
| 553 | uipc_check_fd_locked(ch_id); |
| 554 | } |
| 555 | |
| 556 | UIPC_UNLOCK(); |
| 557 | } |
| 558 | |
| 559 | BTIF_TRACE_EVENT0("UIPC READ THREAD EXITING"); |
| 560 | |
| 561 | uipc_main_cleanup(); |
| 562 | |
| 563 | uipc_main.tid = 0; |
| 564 | |
| 565 | BTIF_TRACE_EVENT0("UIPC READ THREAD DONE"); |
| 566 | } |
| 567 | |
| 568 | |
| 569 | int uipc_start_main_server_thread(void) |
| 570 | { |
| 571 | uipc_main.running = 1; |
| 572 | |
| 573 | if (pthread_create(&uipc_main.tid, (const pthread_attr_t *) NULL, (void*)uipc_read_task, NULL) < 0) |
| 574 | { |
| 575 | BTIF_TRACE_ERROR1("uipc_thread_create pthread_create failed:%d", errno); |
| 576 | return -1; |
| 577 | } |
| 578 | |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | /* blocking call */ |
| 583 | void uipc_stop_main_server_thread(void) |
| 584 | { |
| 585 | /* request shutdown of read thread */ |
| 586 | UIPC_LOCK(); |
| 587 | uipc_main.running = 0; |
| 588 | uipc_wakeup_locked(); |
| 589 | UIPC_UNLOCK(); |
| 590 | |
| 591 | /* wait until read thread is fully terminated */ |
| 592 | if (uipc_main.tid > 0) |
| 593 | pthread_join(uipc_main.tid, NULL); |
| 594 | } |
| 595 | |
| 596 | /******************************************************************************* |
| 597 | ** |
| 598 | ** Function UIPC_Init |
| 599 | ** |
| 600 | ** Description Initialize UIPC module |
| 601 | ** |
| 602 | ** Returns void |
| 603 | ** |
| 604 | *******************************************************************************/ |
| 605 | |
| 606 | UDRV_API void UIPC_Init(void *p_data) |
| 607 | { |
| 608 | BTIF_TRACE_DEBUG0("UIPC_Init"); |
| 609 | |
| 610 | memset(&uipc_main, 0, sizeof(tUIPC_MAIN)); |
| 611 | |
| 612 | uipc_main_init(); |
| 613 | |
| 614 | uipc_start_main_server_thread(); |
| 615 | } |
| 616 | |
| 617 | /******************************************************************************* |
| 618 | ** |
| 619 | ** Function UIPC_Open |
| 620 | ** |
| 621 | ** Description Open UIPC interface |
| 622 | ** |
| 623 | ** Returns TRUE in case of success, FALSE in case of failure. |
| 624 | ** |
| 625 | *******************************************************************************/ |
| 626 | UDRV_API BOOLEAN UIPC_Open(tUIPC_CH_ID ch_id, tUIPC_RCV_CBACK *p_cback) |
| 627 | { |
| 628 | BTIF_TRACE_DEBUG2("UIPC_Open : ch_id %d, p_cback %x", ch_id, p_cback); |
| 629 | |
| 630 | UIPC_LOCK(); |
| 631 | |
| 632 | if (ch_id >= UIPC_CH_NUM) |
| 633 | { |
| 634 | UIPC_UNLOCK(); |
| 635 | return FALSE; |
| 636 | } |
| 637 | |
| 638 | if (uipc_main.ch[ch_id].srvfd != UIPC_DISCONNECTED) |
| 639 | { |
| 640 | BTIF_TRACE_EVENT1("CHANNEL %d ALREADY OPEN", ch_id); |
| 641 | UIPC_UNLOCK(); |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | switch(ch_id) |
| 646 | { |
| 647 | case UIPC_CH_ID_AV_CTRL: |
| 648 | uipc_setup_server_locked(ch_id, A2DP_CTRL_PATH, p_cback); |
| 649 | break; |
| 650 | |
| 651 | case UIPC_CH_ID_AV_AUDIO: |
| 652 | uipc_setup_server_locked(ch_id, A2DP_DATA_PATH, p_cback); |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | UIPC_UNLOCK(); |
| 657 | |
| 658 | return TRUE; |
| 659 | } |
| 660 | |
| 661 | /******************************************************************************* |
| 662 | ** |
| 663 | ** Function UIPC_Close |
| 664 | ** |
| 665 | ** Description Close UIPC interface |
| 666 | ** |
| 667 | ** Returns void |
| 668 | ** |
| 669 | *******************************************************************************/ |
| 670 | |
| 671 | UDRV_API void UIPC_Close(tUIPC_CH_ID ch_id) |
| 672 | { |
| 673 | BTIF_TRACE_DEBUG1("UIPC_Close : ch_id %d", ch_id); |
| 674 | |
| 675 | /* special case handling uipc shutdown */ |
| 676 | if (ch_id != UIPC_CH_ID_ALL) |
| 677 | { |
| 678 | UIPC_LOCK(); |
| 679 | uipc_close_locked(ch_id); |
| 680 | UIPC_UNLOCK(); |
| 681 | } |
| 682 | else |
| 683 | { |
| 684 | BTIF_TRACE_DEBUG0("UIPC_Close : waiting for shutdown to complete"); |
| 685 | uipc_stop_main_server_thread(); |
| 686 | BTIF_TRACE_DEBUG0("UIPC_Close : shutdown complete"); |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /******************************************************************************* |
| 691 | ** |
| 692 | ** Function UIPC_SendBuf |
| 693 | ** |
| 694 | ** Description Called to transmit a message over UIPC. |
| 695 | ** Message buffer will be freed by UIPC_SendBuf. |
| 696 | ** |
| 697 | ** Returns TRUE in case of success, FALSE in case of failure. |
| 698 | ** |
| 699 | *******************************************************************************/ |
| 700 | UDRV_API BOOLEAN UIPC_SendBuf(tUIPC_CH_ID ch_id, BT_HDR *p_msg) |
| 701 | { |
| 702 | BTIF_TRACE_DEBUG1("UIPC_SendBuf : ch_id %d NOT IMPLEMENTED", ch_id); |
| 703 | |
| 704 | UIPC_LOCK(); |
| 705 | |
| 706 | /* currently not used */ |
| 707 | |
| 708 | UIPC_UNLOCK(); |
| 709 | |
| 710 | return FALSE; |
| 711 | } |
| 712 | |
| 713 | /******************************************************************************* |
| 714 | ** |
| 715 | ** Function UIPC_Send |
| 716 | ** |
| 717 | ** Description Called to transmit a message over UIPC. |
| 718 | ** |
| 719 | ** Returns TRUE in case of success, FALSE in case of failure. |
| 720 | ** |
| 721 | *******************************************************************************/ |
| 722 | UDRV_API BOOLEAN UIPC_Send(tUIPC_CH_ID ch_id, UINT16 msg_evt, UINT8 *p_buf, |
| 723 | UINT16 msglen) |
| 724 | { |
| 725 | int n; |
| 726 | |
| 727 | BTIF_TRACE_DEBUG2("UIPC_Send : ch_id:%d %d bytes", ch_id, msglen); |
| 728 | |
| 729 | UIPC_LOCK(); |
| 730 | |
| 731 | if (write(uipc_main.ch[ch_id].fd, p_buf, msglen) < 0) |
| 732 | { |
| 733 | BTIF_TRACE_ERROR1("failed to write (%s)", strerror(errno)); |
| 734 | } |
| 735 | |
| 736 | UIPC_UNLOCK(); |
| 737 | |
| 738 | return FALSE; |
| 739 | } |
| 740 | |
| 741 | /******************************************************************************* |
| 742 | ** |
| 743 | ** Function UIPC_ReadBuf |
| 744 | ** |
| 745 | ** Description Called to read a message from UIPC. |
| 746 | ** |
| 747 | ** Returns void |
| 748 | ** |
| 749 | *******************************************************************************/ |
| 750 | UDRV_API void UIPC_ReadBuf(tUIPC_CH_ID ch_id, BT_HDR *p_msg) |
| 751 | { |
| 752 | BTIF_TRACE_DEBUG1("UIPC_ReadBuf : ch_id:%d NOT IMPLEMENTED", ch_id); |
| 753 | |
| 754 | UIPC_LOCK(); |
| 755 | UIPC_UNLOCK(); |
| 756 | } |
| 757 | |
| 758 | /******************************************************************************* |
| 759 | ** |
| 760 | ** Function UIPC_Read |
| 761 | ** |
| 762 | ** Description Called to read a message from UIPC. |
| 763 | ** |
| 764 | ** Returns return the number of bytes read. |
| 765 | ** |
| 766 | *******************************************************************************/ |
| 767 | |
| 768 | UDRV_API UINT32 UIPC_Read(tUIPC_CH_ID ch_id, UINT16 *p_msg_evt, UINT8 *p_buf, UINT32 len) |
| 769 | { |
| 770 | int n; |
| 771 | int n_read = 0; |
| 772 | int fd = uipc_main.ch[ch_id].fd; |
| 773 | struct pollfd pfd; |
| 774 | |
| 775 | if (ch_id >= UIPC_CH_NUM) |
| 776 | { |
| 777 | BTIF_TRACE_ERROR1("UIPC_Read : invalid ch id %d", ch_id); |
| 778 | return 0; |
| 779 | } |
| 780 | |
| 781 | if (fd == UIPC_DISCONNECTED) |
| 782 | { |
| 783 | BTIF_TRACE_ERROR1("UIPC_Read : channel %d closed", ch_id); |
| 784 | return 0; |
| 785 | } |
| 786 | |
| 787 | //BTIF_TRACE_DEBUG4("UIPC_Read : ch_id %d, len %d, fd %d, polltmo %d", ch_id, len, |
| 788 | // fd, uipc_main.ch[ch_id].read_poll_tmo_ms); |
| 789 | |
| 790 | while (n_read < (int)len) |
| 791 | { |
| 792 | pfd.fd = fd; |
| 793 | pfd.events = POLLIN|POLLHUP; |
| 794 | |
| 795 | /* make sure there is data prior to attempting read to avoid blocking |
| 796 | a read for more than poll timeout */ |
| 797 | if (poll(&pfd, 1, uipc_main.ch[ch_id].read_poll_tmo_ms) == 0) |
| 798 | { |
| 799 | BTIF_TRACE_EVENT1("poll timeout (%d ms)", uipc_main.ch[ch_id].read_poll_tmo_ms); |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | //BTIF_TRACE_EVENT1("poll revents %x", pfd.revents); |
| 804 | |
| 805 | if (pfd.revents & (POLLHUP|POLLNVAL) ) |
| 806 | { |
| 807 | BTIF_TRACE_EVENT0("poll : channel detached remotely"); |
| 808 | UIPC_LOCK(); |
| 809 | uipc_close_locked(ch_id); |
| 810 | UIPC_UNLOCK(); |
| 811 | return 0; |
| 812 | } |
| 813 | |
Ganesh Ganapathi Batta | 45f5f90 | 2013-02-08 11:02:57 -0800 | [diff] [blame^] | 814 | n = recv(fd, p_buf+n_read, len-n_read, 0); |
The Android Open Source Project | 5738f83 | 2012-12-12 16:00:35 -0800 | [diff] [blame] | 815 | |
| 816 | //BTIF_TRACE_EVENT1("read %d bytes", n); |
| 817 | |
| 818 | if (n == 0) |
| 819 | { |
| 820 | BTIF_TRACE_EVENT0("UIPC_Read : channel detached remotely"); |
| 821 | UIPC_LOCK(); |
| 822 | uipc_close_locked(ch_id); |
| 823 | UIPC_UNLOCK(); |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | if (n < 0) |
| 828 | { |
| 829 | BTIF_TRACE_EVENT1("UIPC_Read : read failed (%s)", strerror(errno)); |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | n_read+=n; |
| 834 | |
| 835 | } |
| 836 | |
| 837 | return n_read; |
| 838 | } |
| 839 | |
| 840 | /******************************************************************************* |
| 841 | ** |
| 842 | ** Function UIPC_Ioctl |
| 843 | ** |
| 844 | ** Description Called to control UIPC. |
| 845 | ** |
| 846 | ** Returns void |
| 847 | ** |
| 848 | *******************************************************************************/ |
| 849 | |
| 850 | UDRV_API extern BOOLEAN UIPC_Ioctl(tUIPC_CH_ID ch_id, UINT32 request, void *param) |
| 851 | { |
| 852 | BTIF_TRACE_DEBUG2("#### UIPC_Ioctl : ch_id %d, request %d ####", ch_id, request); |
| 853 | |
| 854 | UIPC_LOCK(); |
| 855 | |
| 856 | switch(request) |
| 857 | { |
| 858 | case UIPC_REQ_RX_FLUSH: |
| 859 | uipc_flush_locked(ch_id); |
| 860 | break; |
| 861 | |
| 862 | case UIPC_REG_CBACK: |
| 863 | //BTIF_TRACE_EVENT3("register callback ch %d srvfd %d, fd %d", ch_id, uipc_main.ch[ch_id].srvfd, uipc_main.ch[ch_id].fd); |
| 864 | uipc_main.ch[ch_id].cback = (tUIPC_RCV_CBACK*)param; |
| 865 | break; |
| 866 | |
| 867 | case UIPC_REG_REMOVE_ACTIVE_READSET: |
| 868 | |
| 869 | /* user will read data directly and not use select loop */ |
| 870 | if (uipc_main.ch[ch_id].fd != UIPC_DISCONNECTED) |
| 871 | { |
| 872 | /* remove this channel from active set */ |
| 873 | FD_CLR(uipc_main.ch[ch_id].fd, &uipc_main.active_set); |
| 874 | |
| 875 | /* refresh active set */ |
| 876 | uipc_wakeup_locked(); |
| 877 | } |
| 878 | break; |
| 879 | |
| 880 | case UIPC_SET_READ_POLL_TMO: |
| 881 | uipc_main.ch[ch_id].read_poll_tmo_ms = (int)param; |
| 882 | BTIF_TRACE_EVENT2("UIPC_SET_READ_POLL_TMO : CH %d, TMO %d ms", ch_id, uipc_main.ch[ch_id].read_poll_tmo_ms ); |
| 883 | break; |
| 884 | |
| 885 | default: |
| 886 | BTIF_TRACE_EVENT1("UIPC_Ioctl : request not handled (%d)", request); |
| 887 | break; |
| 888 | } |
| 889 | |
| 890 | UIPC_UNLOCK(); |
| 891 | |
| 892 | return FALSE; |
| 893 | } |
| 894 | |