blob: 8dd229e0fdb8708150ab0930601c859c6a756379 [file] [log] [blame]
/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "android.hardware.usb.gadget@1.2-service"
#include "UsbGadget.h"
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/inotify.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
namespace android {
namespace hardware {
namespace usb {
namespace gadget {
namespace V1_2 {
namespace implementation {
UsbGadget::UsbGadget() {
if (access(OS_DESC_PATH, R_OK) != 0) {
ALOGE("configfs setup not done yet");
abort();
}
}
void currentFunctionsAppliedCallback(bool functionsApplied, void* payload) {
UsbGadget* gadget = (UsbGadget*)payload;
gadget->mCurrentUsbFunctionsApplied = functionsApplied;
}
Return<void> UsbGadget::getCurrentUsbFunctions(const sp<V1_0::IUsbGadgetCallback>& callback) {
Return<void> ret = callback->getCurrentUsbFunctionsCb(
mCurrentUsbFunctions, mCurrentUsbFunctionsApplied ? Status::FUNCTIONS_APPLIED
: Status::FUNCTIONS_NOT_APPLIED);
if (!ret.isOk()) ALOGE("Call to getCurrentUsbFunctionsCb failed %s", ret.description().c_str());
return Void();
}
Return<void> UsbGadget::getUsbSpeed(const sp<V1_2::IUsbGadgetCallback>& callback) {
std::string current_speed;
if (ReadFileToString(SPEED_PATH, &current_speed)) {
current_speed = Trim(current_speed);
ALOGI("current USB speed is %s", current_speed.c_str());
if (current_speed == "low-speed")
mUsbSpeed = UsbSpeed::LOWSPEED;
else if (current_speed == "full-speed")
mUsbSpeed = UsbSpeed::FULLSPEED;
else if (current_speed == "high-speed")
mUsbSpeed = UsbSpeed::HIGHSPEED;
else if (current_speed == "super-speed")
mUsbSpeed = UsbSpeed::SUPERSPEED;
else if (current_speed == "super-speed-plus")
mUsbSpeed = UsbSpeed::SUPERSPEED_10Gb;
else if (current_speed == "UNKNOWN")
mUsbSpeed = UsbSpeed::UNKNOWN;
else {
/**
* This part is used for USB4 or reserved speed.
*
* If reserved speed is detected, it needs to convert to other speeds.
* For example:
* If the bandwidth of new speed is 7G, adding new if
* statement and set mUsbSpeed to SUPERSPEED.
* If the bandwidth of new speed is 80G, adding new if
* statement and set mUsbSpeed to USB4_GEN3_40Gb.
*/
mUsbSpeed = UsbSpeed::RESERVED_SPEED;
}
} else {
ALOGE("Fail to read current speed");
mUsbSpeed = UsbSpeed::UNKNOWN;
}
if (callback) {
Return<void> ret = callback->getUsbSpeedCb(mUsbSpeed);
if (!ret.isOk()) ALOGE("Call to getUsbSpeedCb failed %s", ret.description().c_str());
}
return Void();
}
V1_0::Status UsbGadget::tearDownGadget() {
if (resetGadget() != V1_0::Status::SUCCESS) return V1_0::Status::ERROR;
if (monitorFfs.isMonitorRunning()) {
monitorFfs.reset();
} else {
ALOGI("mMonitor not running");
}
return V1_0::Status::SUCCESS;
}
Return<Status> UsbGadget::reset() {
if (!WriteStringToFile("none", PULLUP_PATH)) {
ALOGI("Gadget cannot be pulled down");
return Status::ERROR;
}
usleep(kDisconnectWaitUs);
if (!WriteStringToFile(kGadgetName, PULLUP_PATH)) {
ALOGI("Gadget cannot be pulled up");
return Status::ERROR;
}
return Status::SUCCESS;
}
static V1_0::Status validateAndSetVidPid(uint64_t functions) {
V1_0::Status ret = V1_0::Status::SUCCESS;
switch (functions) {
case static_cast<uint64_t>(V1_2::GadgetFunction::MTP):
ret = setVidPid("0x18d1", "0x4ee1");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::MTP:
ret = setVidPid("0x18d1", "0x4ee2");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::RNDIS):
ret = setVidPid("0x18d1", "0x4ee3");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::RNDIS:
ret = setVidPid("0x18d1", "0x4ee4");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::PTP):
ret = setVidPid("0x18d1", "0x4ee5");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::PTP:
ret = setVidPid("0x18d1", "0x4ee6");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::ADB):
ret = setVidPid("0x18d1", "0x4ee7");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::MIDI):
ret = setVidPid("0x18d1", "0x4ee8");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::MIDI:
ret = setVidPid("0x18d1", "0x4ee9");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::NCM):
ret = setVidPid("0x18d1", "0x4eeb");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::NCM:
ret = setVidPid("0x18d1", "0x4eec");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::ACCESSORY):
ret = setVidPid("0x18d1", "0x2d00");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::ACCESSORY:
ret = setVidPid("0x18d1", "0x2d01");
break;
case static_cast<uint64_t>(V1_2::GadgetFunction::AUDIO_SOURCE):
ret = setVidPid("0x18d1", "0x2d02");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::AUDIO_SOURCE:
ret = setVidPid("0x18d1", "0x2d03");
break;
case V1_2::GadgetFunction::ACCESSORY | V1_2::GadgetFunction::AUDIO_SOURCE:
ret = setVidPid("0x18d1", "0x2d04");
break;
case V1_2::GadgetFunction::ADB | V1_2::GadgetFunction::ACCESSORY |
V1_2::GadgetFunction::AUDIO_SOURCE:
ret = setVidPid("0x18d1", "0x2d05");
break;
default:
ALOGE("Combination not supported");
ret = V1_0::Status::CONFIGURATION_NOT_SUPPORTED;
}
return ret;
}
V1_0::Status UsbGadget::setupFunctions(uint64_t functions,
const sp<V1_0::IUsbGadgetCallback>& callback,
uint64_t timeout) {
bool ffsEnabled = false;
int i = 0;
if (addGenericAndroidFunctions(&monitorFfs, functions, &ffsEnabled, &i) !=
V1_0::Status::SUCCESS)
return V1_0::Status::ERROR;
if ((functions & V1_2::GadgetFunction::ADB) != 0) {
ffsEnabled = true;
if (addAdb(&monitorFfs, &i) != V1_0::Status::SUCCESS) return V1_0::Status::ERROR;
}
// Pull up the gadget right away when there are no ffs functions.
if (!ffsEnabled) {
if (!WriteStringToFile(kGadgetName, PULLUP_PATH)) return V1_0::Status::ERROR;
mCurrentUsbFunctionsApplied = true;
if (callback) callback->setCurrentUsbFunctionsCb(functions, V1_0::Status::SUCCESS);
return V1_0::Status::SUCCESS;
}
monitorFfs.registerFunctionsAppliedCallback(&currentFunctionsAppliedCallback, this);
// Monitors the ffs paths to pull up the gadget when descriptors are written.
// Also takes of the pulling up the gadget again if the userspace process
// dies and restarts.
monitorFfs.startMonitor();
if (kDebug) ALOGI("Mainthread in Cv");
if (callback) {
bool pullup = monitorFfs.waitForPullUp(timeout);
Return<void> ret = callback->setCurrentUsbFunctionsCb(
functions, pullup ? V1_0::Status::SUCCESS : V1_0::Status::ERROR);
if (!ret.isOk()) ALOGE("setCurrentUsbFunctionsCb error %s", ret.description().c_str());
}
return V1_0::Status::SUCCESS;
}
Return<void> UsbGadget::setCurrentUsbFunctions(uint64_t functions,
const sp<V1_0::IUsbGadgetCallback>& callback,
uint64_t timeout) {
std::unique_lock<std::mutex> lk(mLockSetCurrentFunction);
mCurrentUsbFunctions = functions;
mCurrentUsbFunctionsApplied = false;
// Unlink the gadget and stop the monitor if running.
V1_0::Status status = tearDownGadget();
if (status != V1_0::Status::SUCCESS) {
goto error;
}
ALOGI("Returned from tearDown gadget");
// Leave the gadget pulled down to give time for the host to sense disconnect.
usleep(kDisconnectWaitUs);
if (functions == static_cast<uint64_t>(V1_2::GadgetFunction::NONE)) {
if (callback == NULL) return Void();
Return<void> ret = callback->setCurrentUsbFunctionsCb(functions, V1_0::Status::SUCCESS);
if (!ret.isOk())
ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.description().c_str());
return Void();
}
status = validateAndSetVidPid(functions);
if (status != V1_0::Status::SUCCESS) {
goto error;
}
status = setupFunctions(functions, callback, timeout);
if (status != V1_0::Status::SUCCESS) {
goto error;
}
ALOGI("Usb Gadget setcurrent functions called successfully");
return Void();
error:
ALOGI("Usb Gadget setcurrent functions failed");
if (callback == NULL) return Void();
Return<void> ret = callback->setCurrentUsbFunctionsCb(functions, status);
if (!ret.isOk())
ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.description().c_str());
return Void();
}
} // namespace implementation
} // namespace V1_2
} // namespace gadget
} // namespace usb
} // namespace hardware
} // namespace android