Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Chris Fries | 9c305b2 | 2017-06-27 12:37:49 -0500 | [diff] [blame] | 17 | #define LOG_TAG "android.hardware.usb@1.1-service.crosshatch" |
Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 18 | |
| 19 | #include <android-base/logging.h> |
| 20 | #include <assert.h> |
| 21 | #include <chrono> |
| 22 | #include <dirent.h> |
| 23 | #include <pthread.h> |
| 24 | #include <regex> |
| 25 | #include <stdio.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <thread> |
| 28 | #include <unistd.h> |
| 29 | #include <unordered_map> |
| 30 | |
| 31 | #include <cutils/uevent.h> |
| 32 | #include <sys/epoll.h> |
| 33 | #include <utils/Errors.h> |
| 34 | #include <utils/StrongPointer.h> |
| 35 | |
| 36 | #include "Usb.h" |
| 37 | |
| 38 | namespace android { |
| 39 | namespace hardware { |
| 40 | namespace usb { |
| 41 | namespace V1_1 { |
| 42 | namespace implementation { |
| 43 | |
| 44 | // Set by the signal handler to destroy the thread |
| 45 | volatile bool destroyThread; |
| 46 | |
| 47 | int32_t readFile(const std::string &filename, std::string *contents) { |
| 48 | FILE *fp; |
| 49 | ssize_t read = 0; |
| 50 | char *line = NULL; |
| 51 | size_t len = 0; |
| 52 | |
| 53 | fp = fopen(filename.c_str(), "r"); |
| 54 | if (fp != NULL) { |
| 55 | if ((read = getline(&line, &len, fp)) != -1) { |
| 56 | char *pos; |
| 57 | if ((pos = strchr(line, '\n')) != NULL) *pos = '\0'; |
| 58 | *contents = line; |
| 59 | } |
| 60 | free(line); |
| 61 | fclose(fp); |
| 62 | return 0; |
| 63 | } else { |
| 64 | ALOGE("fopen failed"); |
| 65 | } |
| 66 | |
| 67 | return -1; |
| 68 | } |
| 69 | |
| 70 | std::string appendRoleNodeHelper(const std::string &portName, |
| 71 | PortRoleType type) { |
| 72 | std::string node("/sys/class/typec/" + portName); |
| 73 | |
| 74 | switch (type) { |
| 75 | case PortRoleType::DATA_ROLE: |
| 76 | return node + "/data_role"; |
| 77 | case PortRoleType::POWER_ROLE: |
| 78 | return node + "/power_role"; |
| 79 | case PortRoleType::MODE: |
| 80 | return node + "/port_type"; |
| 81 | default: |
| 82 | return ""; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | std::string convertRoletoString(PortRole role) { |
| 87 | if (role.type == PortRoleType::POWER_ROLE) { |
| 88 | if (role.role == static_cast<uint32_t>(PortPowerRole::SOURCE)) |
| 89 | return "source"; |
| 90 | else if (role.role == static_cast<uint32_t>(PortPowerRole::SINK)) |
| 91 | return "sink"; |
| 92 | } else if (role.type == PortRoleType::DATA_ROLE) { |
| 93 | if (role.role == static_cast<uint32_t>(PortDataRole::HOST)) return "host"; |
| 94 | if (role.role == static_cast<uint32_t>(PortDataRole::DEVICE)) |
| 95 | return "device"; |
| 96 | } else if (role.type == PortRoleType::MODE) { |
| 97 | if (role.role == static_cast<uint32_t>(PortMode_1_1::UFP)) return "sink"; |
| 98 | if (role.role == static_cast<uint32_t>(PortMode_1_1::DFP)) return "source"; |
| 99 | } |
| 100 | return "none"; |
| 101 | } |
| 102 | |
| 103 | void extractRole(std::string *roleName) { |
| 104 | std::size_t first, last; |
| 105 | |
| 106 | first = roleName->find("["); |
| 107 | last = roleName->find("]"); |
| 108 | |
| 109 | if (first != std::string::npos && last != std::string::npos) { |
| 110 | *roleName = roleName->substr(first + 1, last - first - 1); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | void switchToDrp(const std::string &portName) { |
| 115 | std::string filename = |
| 116 | appendRoleNodeHelper(std::string(portName.c_str()), PortRoleType::MODE); |
| 117 | FILE *fp; |
| 118 | |
| 119 | if (filename != "") { |
| 120 | fp = fopen(filename.c_str(), "w"); |
| 121 | if (fp != NULL) { |
| 122 | int ret = fputs("dual", fp); |
| 123 | fclose(fp); |
| 124 | if (ret == EOF) |
| 125 | ALOGE("Fatal: Error while switching back to drp"); |
| 126 | } else { |
| 127 | ALOGE("Fatal: Cannot open file to switch back to drp"); |
| 128 | } |
| 129 | } else { |
| 130 | ALOGE("Fatal: invalid node type"); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | bool switchMode(const hidl_string &portName, |
| 135 | const PortRole &newRole, struct Usb *usb) { |
| 136 | std::string filename = |
| 137 | appendRoleNodeHelper(std::string(portName.c_str()), newRole.type); |
| 138 | std::string written; |
| 139 | FILE *fp; |
| 140 | bool roleSwitch = false; |
| 141 | |
| 142 | if (filename == "") { |
| 143 | ALOGE("Fatal: invalid node type"); |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | fp = fopen(filename.c_str(), "w"); |
| 148 | if (fp != NULL) { |
| 149 | // Hold the lock here to prevent loosing connected signals |
| 150 | // as once the file is written the partner added signal |
| 151 | // can arrive anytime. |
| 152 | pthread_mutex_lock(&usb->mPartnerLock); |
| 153 | usb->mPartnerUp = false; |
| 154 | int ret = fputs(convertRoletoString(newRole).c_str(), fp); |
| 155 | fclose(fp); |
| 156 | |
| 157 | if (ret != EOF) { |
| 158 | struct timespec to; |
Wei Wang | 655de53 | 2017-08-11 15:05:46 -0700 | [diff] [blame] | 159 | struct timespec now; |
Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 160 | |
| 161 | wait_again: |
Wei Wang | 655de53 | 2017-08-11 15:05:46 -0700 | [diff] [blame] | 162 | clock_gettime(CLOCK_MONOTONIC, &now); |
| 163 | to.tv_sec = now.tv_sec + PORT_TYPE_TIMEOUT; |
| 164 | to.tv_nsec = now.tv_nsec; |
Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 165 | |
| 166 | int err = pthread_cond_timedwait(&usb->mPartnerCV, &usb->mPartnerLock, &to); |
| 167 | // There are no uevent signals which implies role swap timed out. |
| 168 | if (err == ETIMEDOUT) { |
| 169 | ALOGI("uevents wait timedout"); |
| 170 | // Sanity check. |
| 171 | } else if (!usb->mPartnerUp) { |
| 172 | goto wait_again; |
| 173 | // Role switch succeeded since usb->mPartnerUp is true. |
| 174 | } else { |
| 175 | roleSwitch = true; |
| 176 | } |
| 177 | } else { |
| 178 | ALOGI("Role switch failed while wrting to file"); |
| 179 | } |
| 180 | pthread_mutex_unlock(&usb->mPartnerLock); |
| 181 | } |
| 182 | |
| 183 | if (!roleSwitch) |
| 184 | switchToDrp(std::string(portName.c_str())); |
| 185 | |
| 186 | return roleSwitch; |
| 187 | } |
| 188 | |
Wei Wang | 655de53 | 2017-08-11 15:05:46 -0700 | [diff] [blame] | 189 | Usb::Usb() |
| 190 | : mLock(PTHREAD_MUTEX_INITIALIZER), |
| 191 | mRoleSwitchLock(PTHREAD_MUTEX_INITIALIZER), |
| 192 | mPartnerLock(PTHREAD_MUTEX_INITIALIZER), |
| 193 | mPartnerUp(false) { |
| 194 | pthread_condattr_t attr; |
| 195 | if (pthread_condattr_init(&attr)) { |
| 196 | ALOGE("pthread_condattr_init failed: %s", strerror(errno)); |
| 197 | abort(); |
| 198 | } |
| 199 | if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)) { |
| 200 | ALOGE("pthread_condattr_setclock failed: %s", strerror(errno)); |
| 201 | abort(); |
| 202 | } |
| 203 | if (pthread_cond_init(&mPartnerCV, &attr)) { |
| 204 | ALOGE("pthread_cond_init failed: %s", strerror(errno)); |
| 205 | abort(); |
| 206 | } |
| 207 | if (pthread_condattr_destroy(&attr)) { |
| 208 | ALOGE("pthread_condattr_destroy failed: %s", strerror(errno)); |
| 209 | abort(); |
| 210 | } |
| 211 | } |
Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 212 | |
| 213 | |
| 214 | Return<void> Usb::switchRole(const hidl_string &portName, |
| 215 | const PortRole &newRole) { |
| 216 | std::string filename = |
| 217 | appendRoleNodeHelper(std::string(portName.c_str()), newRole.type); |
| 218 | std::string written; |
| 219 | FILE *fp; |
| 220 | bool roleSwitch = false; |
| 221 | |
| 222 | if (filename == "") { |
| 223 | ALOGE("Fatal: invalid node type"); |
| 224 | return Void(); |
| 225 | } |
| 226 | |
| 227 | pthread_mutex_lock(&mRoleSwitchLock); |
| 228 | |
| 229 | ALOGI("filename write: %s role:%s", filename.c_str(), |
| 230 | convertRoletoString(newRole).c_str()); |
| 231 | |
| 232 | if (newRole.type == PortRoleType::MODE) { |
| 233 | roleSwitch = switchMode(portName, newRole, this); |
| 234 | } else { |
| 235 | fp = fopen(filename.c_str(), "w"); |
| 236 | if (fp != NULL) { |
| 237 | int ret = fputs(convertRoletoString(newRole).c_str(), fp); |
| 238 | fclose(fp); |
| 239 | if ((ret != EOF) && !readFile(filename, &written)) { |
| 240 | extractRole(&written); |
| 241 | ALOGI("written: %s", written.c_str()); |
| 242 | if (written == convertRoletoString(newRole)) { |
| 243 | roleSwitch = true; |
| 244 | } else { |
| 245 | ALOGE("Role switch failed"); |
| 246 | } |
| 247 | } else { |
| 248 | ALOGE("failed to update the new role"); |
| 249 | } |
| 250 | } else { |
| 251 | ALOGE("fopen failed"); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | pthread_mutex_lock(&mLock); |
| 256 | if (mCallback_1_0 != NULL) { |
| 257 | Return<void> ret = |
| 258 | mCallback_1_0->notifyRoleSwitchStatus(portName, newRole, |
| 259 | roleSwitch ? Status::SUCCESS : Status::ERROR); |
| 260 | if (!ret.isOk()) |
| 261 | ALOGE("RoleSwitchStatus error %s", ret.description().c_str()); |
| 262 | } else { |
| 263 | ALOGE("Not notifying the userspace. Callback is not set"); |
| 264 | } |
| 265 | pthread_mutex_unlock(&mLock); |
| 266 | pthread_mutex_unlock(&mRoleSwitchLock); |
| 267 | |
| 268 | return Void(); |
| 269 | } |
| 270 | |
| 271 | Status getAccessoryConnected(const std::string &portName, std::string *accessory) { |
| 272 | std::string filename = |
| 273 | "/sys/class/typec/" + portName + "-partner/accessory_mode"; |
| 274 | |
| 275 | if (readFile(filename, accessory)) { |
| 276 | ALOGE("getAccessoryConnected: Failed to open filesystem node: %s", |
| 277 | filename.c_str()); |
| 278 | return Status::ERROR; |
| 279 | } |
| 280 | |
| 281 | return Status::SUCCESS; |
| 282 | } |
| 283 | |
| 284 | Status getCurrentRoleHelper(const std::string &portName, bool connected, |
| 285 | PortRoleType type, uint32_t *currentRole) { |
| 286 | std::string filename; |
| 287 | std::string roleName; |
| 288 | std::string accessory; |
| 289 | |
| 290 | // Mode |
| 291 | |
| 292 | if (type == PortRoleType::POWER_ROLE) { |
| 293 | filename = "/sys/class/typec/" + portName + "/power_role"; |
| 294 | *currentRole = static_cast<uint32_t>(PortPowerRole::NONE); |
| 295 | } else if (type == PortRoleType::DATA_ROLE) { |
| 296 | filename = "/sys/class/typec/" + portName + "/data_role"; |
| 297 | *currentRole = static_cast<uint32_t>(PortDataRole::NONE); |
| 298 | } else if (type == PortRoleType::MODE) { |
| 299 | filename = "/sys/class/typec/" + portName + "/data_role"; |
| 300 | *currentRole = static_cast<uint32_t>(PortMode_1_1::NONE); |
| 301 | } else { |
| 302 | return Status::ERROR; |
| 303 | } |
| 304 | |
| 305 | if (!connected) return Status::SUCCESS; |
| 306 | |
| 307 | if (type == PortRoleType::MODE) { |
| 308 | if (getAccessoryConnected(portName, &accessory) != Status::SUCCESS) { |
| 309 | return Status::ERROR; |
| 310 | } |
| 311 | if (accessory == "analog_audio") { |
| 312 | *currentRole = static_cast<uint32_t>(PortMode_1_1::AUDIO_ACCESSORY); |
| 313 | return Status::SUCCESS; |
| 314 | } else if (accessory == "debug") { |
| 315 | *currentRole = static_cast<uint32_t>(PortMode_1_1::DEBUG_ACCESSORY); |
| 316 | return Status::SUCCESS; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | if (readFile(filename, &roleName)) { |
| 321 | ALOGE("getCurrentRole: Failed to open filesystem node: %s", |
| 322 | filename.c_str()); |
| 323 | return Status::ERROR; |
| 324 | } |
| 325 | |
| 326 | extractRole(&roleName); |
| 327 | |
| 328 | if (roleName == "source") { |
| 329 | *currentRole = static_cast<uint32_t>(PortPowerRole::SOURCE); |
| 330 | } else if (roleName == "sink") { |
| 331 | *currentRole = static_cast<uint32_t>(PortPowerRole::SINK); |
| 332 | } else if (roleName == "host") { |
| 333 | if (type == PortRoleType::DATA_ROLE) |
| 334 | *currentRole = static_cast<uint32_t>(PortDataRole::HOST); |
| 335 | else |
| 336 | *currentRole = static_cast<uint32_t>(PortMode_1_1::DFP); |
| 337 | } else if (roleName == "device") { |
| 338 | if (type == PortRoleType::DATA_ROLE) |
| 339 | *currentRole = static_cast<uint32_t>(PortDataRole::DEVICE); |
| 340 | else |
| 341 | *currentRole = static_cast<uint32_t>(PortMode_1_1::UFP); |
| 342 | } else if (roleName != "none") { |
| 343 | /* case for none has already been addressed. |
| 344 | * so we check if the role isnt none. |
| 345 | */ |
| 346 | return Status::UNRECOGNIZED_ROLE; |
| 347 | } |
| 348 | |
| 349 | return Status::SUCCESS; |
| 350 | } |
| 351 | |
| 352 | Status getTypeCPortNamesHelper(std::unordered_map<std::string, bool> *names) { |
| 353 | DIR *dp; |
| 354 | |
| 355 | dp = opendir("/sys/class/typec"); |
| 356 | if (dp != NULL) { |
Chris Fries | dc2b50d | 2017-06-27 12:02:00 -0500 | [diff] [blame] | 357 | struct dirent *ep; |
| 358 | |
| 359 | while ((ep = readdir(dp))) { |
| 360 | if (ep->d_type == DT_LNK) { |
| 361 | if (std::string::npos == std::string(ep->d_name).find("-partner")) { |
| 362 | std::unordered_map<std::string, bool>::const_iterator portName = |
| 363 | names->find(ep->d_name); |
| 364 | if (portName == names->end()) { |
| 365 | names->insert({ep->d_name, false}); |
| 366 | } |
| 367 | } else { |
| 368 | (*names)[std::strtok(ep->d_name, "-")] = true; |
| 369 | } |
| 370 | } |
| 371 | } |
| 372 | closedir(dp); |
| 373 | return Status::SUCCESS; |
| 374 | } |
| 375 | |
| 376 | ALOGE("Failed to open /sys/class/typec"); |
| 377 | return Status::ERROR; |
| 378 | } |
| 379 | |
| 380 | bool canSwitchRoleHelper(const std::string &portName, PortRoleType /*type*/) { |
| 381 | std::string filename = |
| 382 | "/sys/class/typec/" + portName + "-partner/supports_usb_power_delivery"; |
| 383 | std::string supportsPD; |
| 384 | |
| 385 | if (!readFile(filename, &supportsPD)) { |
| 386 | if (supportsPD == "yes") { |
| 387 | return true; |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | return false; |
| 392 | } |
| 393 | |
| 394 | /* |
| 395 | * Reuse the same method for both V1_0 and V1_1 callback objects. |
| 396 | * The caller of this method would reconstruct the V1_0::PortStatus |
| 397 | * object if required. |
| 398 | */ |
| 399 | Status getPortStatusHelper(hidl_vec<PortStatus_1_1> *currentPortStatus_1_1, |
| 400 | bool V1_0) { |
| 401 | std::unordered_map<std::string, bool> names; |
| 402 | Status result = getTypeCPortNamesHelper(&names); |
| 403 | int i = -1; |
| 404 | |
| 405 | if (result == Status::SUCCESS) { |
| 406 | currentPortStatus_1_1->resize(names.size()); |
| 407 | for (std::pair<std::string, bool> port : names) { |
| 408 | i++; |
| 409 | ALOGI("%s", port.first.c_str()); |
| 410 | (*currentPortStatus_1_1)[i].status.portName = port.first; |
| 411 | |
| 412 | uint32_t currentRole; |
| 413 | if (getCurrentRoleHelper(port.first, port.second, |
| 414 | PortRoleType::POWER_ROLE, |
| 415 | ¤tRole) == Status::SUCCESS) { |
| 416 | (*currentPortStatus_1_1)[i].status.currentPowerRole = |
| 417 | static_cast<PortPowerRole>(currentRole); |
| 418 | } else { |
| 419 | ALOGE("Error while retreiving portNames"); |
| 420 | goto done; |
| 421 | } |
| 422 | |
| 423 | if (getCurrentRoleHelper(port.first, port.second, PortRoleType::DATA_ROLE, |
| 424 | ¤tRole) == Status::SUCCESS) { |
| 425 | (*currentPortStatus_1_1)[i].status.currentDataRole = |
| 426 | static_cast<PortDataRole>(currentRole); |
| 427 | } else { |
| 428 | ALOGE("Error while retreiving current port role"); |
| 429 | goto done; |
| 430 | } |
| 431 | |
| 432 | if (getCurrentRoleHelper(port.first, port.second, PortRoleType::MODE, |
| 433 | ¤tRole) == Status::SUCCESS) { |
| 434 | (*currentPortStatus_1_1)[i].currentMode = |
| 435 | static_cast<PortMode_1_1>(currentRole); |
| 436 | (*currentPortStatus_1_1)[i].status.currentMode = |
| 437 | static_cast<V1_0::PortMode>(currentRole); |
| 438 | } else { |
| 439 | ALOGE("Error while retreiving current data role"); |
| 440 | goto done; |
| 441 | } |
| 442 | |
| 443 | (*currentPortStatus_1_1)[i].status.canChangeMode = true; |
| 444 | (*currentPortStatus_1_1)[i].status.canChangeDataRole = |
| 445 | port.second ? canSwitchRoleHelper(port.first, PortRoleType::DATA_ROLE) |
| 446 | : false; |
| 447 | (*currentPortStatus_1_1)[i].status.canChangePowerRole = |
| 448 | port.second |
| 449 | ? canSwitchRoleHelper(port.first, PortRoleType::POWER_ROLE) |
| 450 | : false; |
| 451 | |
| 452 | ALOGI("connected:%d canChangeMode:%d canChagedata:%d canChangePower:%d", |
| 453 | port.second, (*currentPortStatus_1_1)[i].status.canChangeMode, |
| 454 | (*currentPortStatus_1_1)[i].status.canChangeDataRole, |
| 455 | (*currentPortStatus_1_1)[i].status.canChangePowerRole); |
| 456 | |
| 457 | if (V1_0) { |
| 458 | (*currentPortStatus_1_1)[i].status.supportedModes = V1_0::PortMode::DFP; |
| 459 | } else { |
| 460 | (*currentPortStatus_1_1)[i].supportedModes = PortMode_1_1::UFP | PortMode_1_1::DFP; |
| 461 | (*currentPortStatus_1_1)[i].status.supportedModes = V1_0::PortMode::NONE; |
| 462 | (*currentPortStatus_1_1)[i].status.currentMode = V1_0::PortMode::NONE; |
| 463 | } |
| 464 | } |
| 465 | return Status::SUCCESS; |
| 466 | } |
| 467 | done: |
| 468 | return Status::ERROR; |
| 469 | } |
| 470 | |
| 471 | Return<void> Usb::queryPortStatus() { |
| 472 | hidl_vec<PortStatus_1_1> currentPortStatus_1_1; |
| 473 | hidl_vec<V1_0::PortStatus> currentPortStatus; |
| 474 | Status status; |
| 475 | sp<IUsbCallback> callback_V1_1 = IUsbCallback::castFrom(mCallback_1_0); |
| 476 | |
| 477 | pthread_mutex_lock(&mLock); |
| 478 | if (mCallback_1_0 != NULL) { |
| 479 | if (callback_V1_1 != NULL) { |
| 480 | status = getPortStatusHelper(¤tPortStatus_1_1, false); |
| 481 | } else { |
| 482 | status = getPortStatusHelper(¤tPortStatus_1_1, true); |
| 483 | currentPortStatus.resize(currentPortStatus_1_1.size()); |
| 484 | for (unsigned long i = 0; i < currentPortStatus_1_1.size(); i++) |
| 485 | currentPortStatus[i] = currentPortStatus_1_1[i].status; |
| 486 | } |
| 487 | |
| 488 | Return<void> ret; |
| 489 | |
| 490 | if (callback_V1_1 != NULL) |
| 491 | ret = callback_V1_1->notifyPortStatusChange_1_1(currentPortStatus_1_1, status); |
| 492 | else |
| 493 | ret = mCallback_1_0->notifyPortStatusChange(currentPortStatus, status); |
| 494 | |
| 495 | if (!ret.isOk()) |
| 496 | ALOGE("queryPortStatus_1_1 error %s", ret.description().c_str()); |
| 497 | } else { |
| 498 | ALOGI("Notifying userspace skipped. Callback is NULL"); |
| 499 | } |
| 500 | pthread_mutex_unlock(&mLock); |
| 501 | |
| 502 | return Void(); |
| 503 | } |
| 504 | |
| 505 | struct data { |
| 506 | int uevent_fd; |
| 507 | android::hardware::usb::V1_1::implementation::Usb *usb; |
| 508 | }; |
| 509 | |
| 510 | static void uevent_event(uint32_t /*epevents*/, struct data *payload) { |
| 511 | char msg[UEVENT_MSG_LEN + 2]; |
| 512 | char *cp; |
| 513 | int n; |
| 514 | |
| 515 | n = uevent_kernel_multicast_recv(payload->uevent_fd, msg, UEVENT_MSG_LEN); |
| 516 | if (n <= 0) return; |
| 517 | if (n >= UEVENT_MSG_LEN) /* overflow -- discard */ |
| 518 | return; |
| 519 | |
| 520 | msg[n] = '\0'; |
| 521 | msg[n + 1] = '\0'; |
| 522 | cp = msg; |
| 523 | |
| 524 | while (*cp) { |
| 525 | if (std::regex_match(cp, std::regex("(add)(.*)(-partner)"))) { |
| 526 | ALOGI("partner added"); |
| 527 | pthread_mutex_lock(&payload->usb->mPartnerLock); |
| 528 | payload->usb->mPartnerUp = true; |
| 529 | pthread_cond_signal(&payload->usb->mPartnerCV); |
| 530 | pthread_mutex_unlock(&payload->usb->mPartnerLock); |
| 531 | } else if (!strncmp(cp, "DEVTYPE=typec_", strlen("DEVTYPE=typec_"))) { |
| 532 | hidl_vec<PortStatus_1_1> currentPortStatus_1_1; |
| 533 | ALOGI("uevent received %s", cp); |
| 534 | pthread_mutex_lock(&payload->usb->mLock); |
| 535 | if (payload->usb->mCallback_1_0 != NULL) { |
| 536 | sp<IUsbCallback> callback_V1_1 = IUsbCallback::castFrom(payload->usb->mCallback_1_0); |
| 537 | Return<void> ret; |
| 538 | |
| 539 | // V1_1 callback |
| 540 | if (callback_V1_1 != NULL) { |
| 541 | Status status = getPortStatusHelper(¤tPortStatus_1_1, false); |
| 542 | ret = callback_V1_1->notifyPortStatusChange_1_1( |
| 543 | currentPortStatus_1_1, status); |
| 544 | } else { // V1_0 callback |
| 545 | Status status = getPortStatusHelper(¤tPortStatus_1_1, true); |
| 546 | |
| 547 | /* |
| 548 | * Copying the result from getPortStatusHelper |
| 549 | * into V1_0::PortStatus to pass back through |
| 550 | * the V1_0 callback object. |
| 551 | */ |
| 552 | hidl_vec<V1_0::PortStatus> currentPortStatus; |
| 553 | currentPortStatus.resize(currentPortStatus_1_1.size()); |
| 554 | for (unsigned long i = 0; i < currentPortStatus_1_1.size(); i++) |
| 555 | currentPortStatus[i] = currentPortStatus_1_1[i].status; |
| 556 | |
| 557 | ret = payload->usb->mCallback_1_0->notifyPortStatusChange( |
| 558 | currentPortStatus, status); |
| 559 | } |
| 560 | if (!ret.isOk()) ALOGE("error %s", ret.description().c_str()); |
| 561 | } else { |
| 562 | ALOGI("Notifying userspace skipped. Callback is NULL"); |
| 563 | } |
| 564 | pthread_mutex_unlock(&payload->usb->mLock); |
| 565 | |
| 566 | //Role switch is not in progress and port is in disconnected state |
| 567 | if (!pthread_mutex_trylock(&payload->usb->mRoleSwitchLock)) { |
| 568 | for (unsigned long i = 0; i < currentPortStatus_1_1.size(); i++) { |
| 569 | DIR *dp = opendir(std::string("/sys/class/typec/" |
| 570 | + std::string(currentPortStatus_1_1[i].status.portName.c_str()) |
| 571 | + "-partner").c_str()); |
| 572 | if (dp == NULL) { |
| 573 | //PortRole role = {.role = static_cast<uint32_t>(PortMode::UFP)}; |
| 574 | switchToDrp(currentPortStatus_1_1[i].status.portName); |
| 575 | } else { |
| 576 | closedir(dp); |
| 577 | } |
| 578 | } |
| 579 | pthread_mutex_unlock(&payload->usb->mRoleSwitchLock); |
| 580 | } |
| 581 | break; |
| 582 | } |
| 583 | /* advance to after the next \0 */ |
| 584 | while (*cp++) {} |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | void *work(void *param) { |
| 589 | int epoll_fd, uevent_fd; |
| 590 | struct epoll_event ev; |
| 591 | int nevents = 0; |
| 592 | struct data payload; |
| 593 | |
| 594 | ALOGE("creating thread"); |
| 595 | |
| 596 | uevent_fd = uevent_open_socket(64 * 1024, true); |
| 597 | |
| 598 | if (uevent_fd < 0) { |
| 599 | ALOGE("uevent_init: uevent_open_socket failed\n"); |
| 600 | return NULL; |
| 601 | } |
| 602 | |
| 603 | payload.uevent_fd = uevent_fd; |
| 604 | payload.usb = (android::hardware::usb::V1_1::implementation::Usb *)param; |
| 605 | |
| 606 | fcntl(uevent_fd, F_SETFL, O_NONBLOCK); |
| 607 | |
| 608 | ev.events = EPOLLIN; |
| 609 | ev.data.ptr = (void *)uevent_event; |
| 610 | |
| 611 | epoll_fd = epoll_create(64); |
| 612 | if (epoll_fd == -1) { |
| 613 | ALOGE("epoll_create failed; errno=%d", errno); |
| 614 | goto error; |
| 615 | } |
| 616 | |
| 617 | if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, uevent_fd, &ev) == -1) { |
| 618 | ALOGE("epoll_ctl failed; errno=%d", errno); |
| 619 | goto error; |
| 620 | } |
| 621 | |
| 622 | while (!destroyThread) { |
| 623 | struct epoll_event events[64]; |
| 624 | |
| 625 | nevents = epoll_wait(epoll_fd, events, 64, -1); |
| 626 | if (nevents == -1) { |
| 627 | if (errno == EINTR) continue; |
| 628 | ALOGE("usb epoll_wait failed; errno=%d", errno); |
| 629 | break; |
| 630 | } |
| 631 | |
| 632 | for (int n = 0; n < nevents; ++n) { |
| 633 | if (events[n].data.ptr) |
| 634 | (*(void (*)(int, struct data *payload))events[n].data.ptr)( |
| 635 | events[n].events, &payload); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | ALOGI("exiting worker thread"); |
| 640 | error: |
| 641 | close(uevent_fd); |
| 642 | |
| 643 | if (epoll_fd >= 0) close(epoll_fd); |
| 644 | |
| 645 | return NULL; |
| 646 | } |
| 647 | |
| 648 | void sighandler(int sig) { |
| 649 | if (sig == SIGUSR1) { |
| 650 | destroyThread = true; |
| 651 | ALOGI("destroy set"); |
| 652 | return; |
| 653 | } |
| 654 | signal(SIGUSR1, sighandler); |
| 655 | } |
| 656 | |
| 657 | Return<void> Usb::setCallback(const sp<V1_0::IUsbCallback> &callback) { |
| 658 | |
| 659 | sp<IUsbCallback> callback_V1_1 = IUsbCallback::castFrom(callback); |
| 660 | |
| 661 | if (callback != NULL) |
| 662 | if (callback_V1_1 == NULL) |
| 663 | ALOGI("Registering 1.0 callback"); |
| 664 | |
| 665 | pthread_mutex_lock(&mLock); |
| 666 | /* |
| 667 | * When both the old callback and new callback values are NULL, |
| 668 | * there is no need to spin off the worker thread. |
| 669 | * When both the values are not NULL, we would already have a |
| 670 | * worker thread running, so updating the callback object would |
| 671 | * be suffice. |
| 672 | */ |
| 673 | if ((mCallback_1_0 == NULL && callback == NULL) || |
| 674 | (mCallback_1_0 != NULL && callback != NULL)) { |
| 675 | /* |
| 676 | * Always store as V1_0 callback object. Type cast to V1_1 |
| 677 | * when the callback is actually invoked. |
| 678 | */ |
| 679 | mCallback_1_0 = callback; |
| 680 | pthread_mutex_unlock(&mLock); |
| 681 | return Void(); |
| 682 | } |
| 683 | |
| 684 | mCallback_1_0 = callback; |
| 685 | ALOGI("registering callback"); |
| 686 | |
| 687 | // Kill the worker thread if the new callback is NULL. |
| 688 | if (mCallback_1_0 == NULL) { |
| 689 | pthread_mutex_unlock(&mLock); |
| 690 | if (!pthread_kill(mPoll, SIGUSR1)) { |
| 691 | pthread_join(mPoll, NULL); |
| 692 | ALOGI("pthread destroyed"); |
| 693 | } |
| 694 | return Void(); |
| 695 | } |
| 696 | |
| 697 | destroyThread = false; |
| 698 | signal(SIGUSR1, sighandler); |
| 699 | |
| 700 | /* |
| 701 | * Create a background thread if the old callback value is NULL |
| 702 | * and being updated with a new value. |
| 703 | */ |
| 704 | if (pthread_create(&mPoll, NULL, work, this)) { |
| 705 | ALOGE("pthread creation failed %d", errno); |
| 706 | mCallback_1_0 = NULL; |
| 707 | } |
| 708 | |
| 709 | pthread_mutex_unlock(&mLock); |
| 710 | return Void(); |
| 711 | } |
| 712 | |
| 713 | } // namespace implementation |
| 714 | } // namespace V1_0 |
| 715 | } // namespace usb |
| 716 | } // namespace hardware |
| 717 | } // namespace android |