usb/gadget/aidl/default/UsbGadget.cpp - LeafOS-Project/android_hardware_interfaces - Gitiles

 /*
  * 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.aidl-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>

 #include <aidl/android/frameworks/stats/IStats.h>

 namespace aidl {
 namespace android {
 namespace hardware {
 namespace usb {
 namespace gadget {

 string enabledPath;
 constexpr char kHsi2cPath[] = "/sys/devices/platform/10d50000.hsi2c";
 constexpr char kI2CPath[] = "/sys/devices/platform/10d50000.hsi2c/i2c-";
 constexpr char kAccessoryLimitCurrent[] = "i2c-max77759tcpc/usb_limit_accessory_current";
 constexpr char kAccessoryLimitCurrentEnable[] = "i2c-max77759tcpc/usb_limit_accessory_enable";

 UsbGadget::UsbGadget() : mGadgetIrqPath("") {
 }

 Status UsbGadget::getUsbGadgetIrqPath() {
     std::string irqs;
     size_t read_pos = 0;
     size_t found_pos = 0;

     if (!ReadFileToString(kProcInterruptsPath, &irqs)) {
         ALOGE("cannot read all interrupts");
         return Status::ERROR;
     }

     while (true) {
         found_pos = irqs.find_first_of("\n", read_pos);
         if (found_pos == std::string::npos) {
             ALOGI("the string of all interrupts is unexpected");
             return Status::ERROR;
         }

         std::string single_irq = irqs.substr(read_pos, found_pos - read_pos);

         if (single_irq.find("dwc3", 0) != std::string::npos) {
             unsigned int dwc3_irq_number;
             size_t dwc3_pos = single_irq.find_first_of(":");
             if (!ParseUint(single_irq.substr(0, dwc3_pos), &dwc3_irq_number)) {
                 ALOGI("unknown IRQ strings");
                 return Status::ERROR;
             }

             mGadgetIrqPath = kProcIrqPath + single_irq.substr(0, dwc3_pos) + kSmpAffinityList;
             break;
         }

         if (found_pos == irqs.npos) {
             ALOGI("USB gadget doesn't start");
             return Status::ERROR;
         }

         read_pos = found_pos + 1;
     }

     return Status::SUCCESS;
 }

 void currentFunctionsAppliedCallback(bool functionsApplied, void *payload) {
     UsbGadget *gadget = (UsbGadget *)payload;
     gadget->mCurrentUsbFunctionsApplied = functionsApplied;
 }

 ScopedAStatus UsbGadget::getCurrentUsbFunctions(const shared_ptr<IUsbGadgetCallback>& callback,
                                                 int64_t in_transactionId) {
     if (callback == nullptr) {
         return ScopedAStatus::fromExceptionCode(EX_NULL_POINTER);
     }
     ScopedAStatus ret = callback->getCurrentUsbFunctionsCb(
         mCurrentUsbFunctions,
         mCurrentUsbFunctionsApplied ? Status::FUNCTIONS_APPLIED : Status::FUNCTIONS_NOT_APPLIED,
 	in_transactionId);
     if (!ret.isOk())
         ALOGE("Call to getCurrentUsbFunctionsCb failed %s", ret.getDescription().c_str());

     return ScopedAStatus::ok();
 }

 ScopedAStatus UsbGadget::getUsbSpeed(const shared_ptr<IUsbGadgetCallback> &callback,
 	int64_t in_transactionId) {
     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
             mUsbSpeed = UsbSpeed::UNKNOWN;
     } else {
         ALOGE("Fail to read current speed");
         mUsbSpeed = UsbSpeed::UNKNOWN;
     }

     if (callback) {
         ScopedAStatus ret = callback->getUsbSpeedCb(mUsbSpeed, in_transactionId);

         if (!ret.isOk())
             ALOGE("Call to getUsbSpeedCb failed %s", ret.getDescription().c_str());
     }

     return ScopedAStatus::ok();
 }

 Status UsbGadget::tearDownGadget() {
     return Status::SUCCESS;
 }

 ScopedAStatus UsbGadget::reset(const shared_ptr<IUsbGadgetCallback> &callback,
         int64_t in_transactionId) {
     if (callback)
         callback->resetCb(Status::SUCCESS, in_transactionId);
     return ScopedAStatus::ok();
 }

 Status UsbGadget::setupFunctions(long functions,
 	const shared_ptr<IUsbGadgetCallback> &callback, uint64_t timeout,
 	int64_t in_transactionId) {
     bool ffsEnabled = false;
     if (timeout == 0) {
 	ALOGI("timeout not setup");
     }

     if ((functions & GadgetFunction::ADB) != 0) {
         ffsEnabled = true;
     }

     if ((functions & GadgetFunction::NCM) != 0) {
         ALOGI("setCurrentUsbFunctions ncm");
     }

     // Pull up the gadget right away when there are no ffs functions.
     if (!ffsEnabled) {
         mCurrentUsbFunctionsApplied = true;
         if (callback)
             callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS, in_transactionId);
         return Status::SUCCESS;
     }

     return Status::SUCCESS;
 }

 Status getI2cBusHelper(string *name) {
     DIR *dp;

     dp = opendir(kHsi2cPath);
     if (dp != NULL) {
         struct dirent *ep;

         while ((ep = readdir(dp))) {
             if (ep->d_type == DT_DIR) {
                 if (string::npos != string(ep->d_name).find("i2c-")) {
                     std::strtok(ep->d_name, "-");
                     *name = std::strtok(NULL, "-");
                 }
             }
         }
         closedir(dp);
         return Status::SUCCESS;
     }

     ALOGE("Failed to open %s", kHsi2cPath);
     return Status::ERROR;
 }

 ScopedAStatus UsbGadget::setCurrentUsbFunctions(int64_t functions,
                                                const shared_ptr<IUsbGadgetCallback> &callback,
 					       int64_t timeoutMs,
 					       int64_t in_transactionId) {
     std::unique_lock<std::mutex> lk(mLockSetCurrentFunction);
     std::string current_usb_power_operation_mode, current_usb_type;
     std::string usb_limit_sink_enable;

     string accessoryCurrentLimitEnablePath, accessoryCurrentLimitPath, path;

     mCurrentUsbFunctions = functions;
     mCurrentUsbFunctionsApplied = false;

     getI2cBusHelper(&path);
     accessoryCurrentLimitPath = kI2CPath + path + "/" + kAccessoryLimitCurrent;
     accessoryCurrentLimitEnablePath = kI2CPath + path + "/" + kAccessoryLimitCurrentEnable;

     // Get the gadget IRQ number before tearDownGadget()
     if (mGadgetIrqPath.empty())
         getUsbGadgetIrqPath();

     // Unlink the gadget and stop the monitor if running.
     Status status = tearDownGadget();
     if (status != 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 == GadgetFunction::NONE) {
         if (callback == NULL)
             return ScopedAStatus::fromServiceSpecificErrorWithMessage(
                 -1, "callback == NULL");
         ScopedAStatus ret = callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS, in_transactionId);
         if (!ret.isOk())
             ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.getDescription().c_str());
         return ScopedAStatus::fromServiceSpecificErrorWithMessage(
                 -1, "Error while calling setCurrentUsbFunctionsCb");
     }

     status = setupFunctions(functions, callback, timeoutMs, in_transactionId);
     if (status != Status::SUCCESS) {
         goto error;
     }

     if (functions & GadgetFunction::NCM) {
         if (!mGadgetIrqPath.empty()) {
             if (!WriteStringToFile(BIG_CORE, mGadgetIrqPath))
                 ALOGI("Cannot move gadget IRQ to big core, path:%s", mGadgetIrqPath.c_str());
         }
     } else {
         if (!mGadgetIrqPath.empty()) {
             if (!WriteStringToFile(MEDIUM_CORE, mGadgetIrqPath))
                 ALOGI("Cannot move gadget IRQ to medium core, path:%s", mGadgetIrqPath.c_str());
         }
     }

     if (ReadFileToString(CURRENT_USB_TYPE_PATH, &current_usb_type))
         current_usb_type = Trim(current_usb_type);

     if (ReadFileToString(CURRENT_USB_POWER_OPERATION_MODE_PATH, &current_usb_power_operation_mode))
         current_usb_power_operation_mode = Trim(current_usb_power_operation_mode);

     if (functions & GadgetFunction::ACCESSORY &&
         current_usb_type == "Unknown SDP [CDP] DCP" &&
         (current_usb_power_operation_mode == "default" ||
         current_usb_power_operation_mode == "1.5A")) {
         if (!WriteStringToFile("1300000", accessoryCurrentLimitPath)) {
             ALOGI("Write 1.3A to limit current fail");
         } else {
             if (!WriteStringToFile("1", accessoryCurrentLimitEnablePath)) {
                 ALOGI("Enable limit current fail");
             }
         }
     } else {
         if (!WriteStringToFile("0", accessoryCurrentLimitEnablePath))
             ALOGI("unvote accessory limit current failed");
     }

     ALOGI("Usb Gadget setcurrent functions called successfully");
     return ScopedAStatus::fromServiceSpecificErrorWithMessage(
                 -1, "Usb Gadget setcurrent functions called successfully");


 error:
     ALOGI("Usb Gadget setcurrent functions failed");
     if (callback == NULL)
         return ScopedAStatus::fromServiceSpecificErrorWithMessage(
                 -1, "Usb Gadget setcurrent functions failed");
     ScopedAStatus ret = callback->setCurrentUsbFunctionsCb(functions, status, in_transactionId);
     if (!ret.isOk())
         ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.getDescription().c_str());
     return ScopedAStatus::fromServiceSpecificErrorWithMessage(
                 -1, "Error while calling setCurrentUsbFunctionsCb");
 }
 }  // namespace gadget
 }  // namespace usb
 }  // namespace hardware
 }  // namespace android
 }  // aidl
	/*
	* 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.aidl-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>

	#include <aidl/android/frameworks/stats/IStats.h>

	namespace aidl {
	namespace android {
	namespace hardware {
	namespace usb {
	namespace gadget {

	string enabledPath;
	constexpr char kHsi2cPath[] = "/sys/devices/platform/10d50000.hsi2c";
	constexpr char kI2CPath[] = "/sys/devices/platform/10d50000.hsi2c/i2c-";
	constexpr char kAccessoryLimitCurrent[] = "i2c-max77759tcpc/usb_limit_accessory_current";
	constexpr char kAccessoryLimitCurrentEnable[] = "i2c-max77759tcpc/usb_limit_accessory_enable";

	UsbGadget::UsbGadget() : mGadgetIrqPath("") {
	}

	Status UsbGadget::getUsbGadgetIrqPath() {
	std::string irqs;
	size_t read_pos = 0;
	size_t found_pos = 0;

	if (!ReadFileToString(kProcInterruptsPath, &irqs)) {
	ALOGE("cannot read all interrupts");
	return Status::ERROR;
	}

	while (true) {
	found_pos = irqs.find_first_of("\n", read_pos);
	if (found_pos == std::string::npos) {
	ALOGI("the string of all interrupts is unexpected");
	return Status::ERROR;
	}

	std::string single_irq = irqs.substr(read_pos, found_pos - read_pos);

	if (single_irq.find("dwc3", 0) != std::string::npos) {
	unsigned int dwc3_irq_number;
	size_t dwc3_pos = single_irq.find_first_of(":");
	if (!ParseUint(single_irq.substr(0, dwc3_pos), &dwc3_irq_number)) {
	ALOGI("unknown IRQ strings");
	return Status::ERROR;
	}

	mGadgetIrqPath = kProcIrqPath + single_irq.substr(0, dwc3_pos) + kSmpAffinityList;
	break;
	}

	if (found_pos == irqs.npos) {
	ALOGI("USB gadget doesn't start");
	return Status::ERROR;
	}

	read_pos = found_pos + 1;
	}

	return Status::SUCCESS;
	}

	void currentFunctionsAppliedCallback(bool functionsApplied, void *payload) {
	UsbGadget gadget = (UsbGadget )payload;
	gadget->mCurrentUsbFunctionsApplied = functionsApplied;
	}

	ScopedAStatus UsbGadget::getCurrentUsbFunctions(const shared_ptr<IUsbGadgetCallback>& callback,
	int64_t in_transactionId) {
	if (callback == nullptr) {
	return ScopedAStatus::fromExceptionCode(EX_NULL_POINTER);
	}
	ScopedAStatus ret = callback->getCurrentUsbFunctionsCb(
	mCurrentUsbFunctions,
	mCurrentUsbFunctionsApplied ? Status::FUNCTIONS_APPLIED : Status::FUNCTIONS_NOT_APPLIED,
	in_transactionId);
	if (!ret.isOk())
	ALOGE("Call to getCurrentUsbFunctionsCb failed %s", ret.getDescription().c_str());

	return ScopedAStatus::ok();
	}

	ScopedAStatus UsbGadget::getUsbSpeed(const shared_ptr<IUsbGadgetCallback> &callback,
	int64_t in_transactionId) {
	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
	mUsbSpeed = UsbSpeed::UNKNOWN;
	} else {
	ALOGE("Fail to read current speed");
	mUsbSpeed = UsbSpeed::UNKNOWN;
	}

	if (callback) {
	ScopedAStatus ret = callback->getUsbSpeedCb(mUsbSpeed, in_transactionId);

	if (!ret.isOk())
	ALOGE("Call to getUsbSpeedCb failed %s", ret.getDescription().c_str());
	}

	return ScopedAStatus::ok();
	}

	Status UsbGadget::tearDownGadget() {
	return Status::SUCCESS;
	}

	ScopedAStatus UsbGadget::reset(const shared_ptr<IUsbGadgetCallback> &callback,
	int64_t in_transactionId) {
	if (callback)
	callback->resetCb(Status::SUCCESS, in_transactionId);
	return ScopedAStatus::ok();
	}

	Status UsbGadget::setupFunctions(long functions,
	const shared_ptr<IUsbGadgetCallback> &callback, uint64_t timeout,
	int64_t in_transactionId) {
	bool ffsEnabled = false;
	if (timeout == 0) {
	ALOGI("timeout not setup");
	}

	if ((functions & GadgetFunction::ADB) != 0) {
	ffsEnabled = true;
	}

	if ((functions & GadgetFunction::NCM) != 0) {
	ALOGI("setCurrentUsbFunctions ncm");
	}

	// Pull up the gadget right away when there are no ffs functions.
	if (!ffsEnabled) {
	mCurrentUsbFunctionsApplied = true;
	if (callback)
	callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS, in_transactionId);
	return Status::SUCCESS;
	}

	return Status::SUCCESS;
	}

	Status getI2cBusHelper(string *name) {
	DIR *dp;

	dp = opendir(kHsi2cPath);
	if (dp != NULL) {
	struct dirent *ep;

	while ((ep = readdir(dp))) {
	if (ep->d_type == DT_DIR) {
	if (string::npos != string(ep->d_name).find("i2c-")) {
	std::strtok(ep->d_name, "-");
	*name = std::strtok(NULL, "-");
	}
	}
	}
	closedir(dp);
	return Status::SUCCESS;
	}

	ALOGE("Failed to open %s", kHsi2cPath);
	return Status::ERROR;
	}

	ScopedAStatus UsbGadget::setCurrentUsbFunctions(int64_t functions,
	const shared_ptr<IUsbGadgetCallback> &callback,
	int64_t timeoutMs,
	int64_t in_transactionId) {
	std::unique_lock<std::mutex> lk(mLockSetCurrentFunction);
	std::string current_usb_power_operation_mode, current_usb_type;
	std::string usb_limit_sink_enable;

	string accessoryCurrentLimitEnablePath, accessoryCurrentLimitPath, path;

	mCurrentUsbFunctions = functions;
	mCurrentUsbFunctionsApplied = false;

	getI2cBusHelper(&path);
	accessoryCurrentLimitPath = kI2CPath + path + "/" + kAccessoryLimitCurrent;
	accessoryCurrentLimitEnablePath = kI2CPath + path + "/" + kAccessoryLimitCurrentEnable;

	// Get the gadget IRQ number before tearDownGadget()
	if (mGadgetIrqPath.empty())
	getUsbGadgetIrqPath();

	// Unlink the gadget and stop the monitor if running.
	Status status = tearDownGadget();
	if (status != 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 == GadgetFunction::NONE) {
	if (callback == NULL)
	return ScopedAStatus::fromServiceSpecificErrorWithMessage(
	-1, "callback == NULL");
	ScopedAStatus ret = callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS, in_transactionId);
	if (!ret.isOk())
	ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.getDescription().c_str());
	return ScopedAStatus::fromServiceSpecificErrorWithMessage(
	-1, "Error while calling setCurrentUsbFunctionsCb");
	}

	status = setupFunctions(functions, callback, timeoutMs, in_transactionId);
	if (status != Status::SUCCESS) {
	goto error;
	}

	if (functions & GadgetFunction::NCM) {
	if (!mGadgetIrqPath.empty()) {
	if (!WriteStringToFile(BIG_CORE, mGadgetIrqPath))
	ALOGI("Cannot move gadget IRQ to big core, path:%s", mGadgetIrqPath.c_str());
	}
	} else {
	if (!mGadgetIrqPath.empty()) {
	if (!WriteStringToFile(MEDIUM_CORE, mGadgetIrqPath))
	ALOGI("Cannot move gadget IRQ to medium core, path:%s", mGadgetIrqPath.c_str());
	}
	}

	if (ReadFileToString(CURRENT_USB_TYPE_PATH, &current_usb_type))
	current_usb_type = Trim(current_usb_type);

	if (ReadFileToString(CURRENT_USB_POWER_OPERATION_MODE_PATH, &current_usb_power_operation_mode))
	current_usb_power_operation_mode = Trim(current_usb_power_operation_mode);

	if (functions & GadgetFunction::ACCESSORY &&
	current_usb_type == "Unknown SDP [CDP] DCP" &&
	(current_usb_power_operation_mode == "default" \|\|
	current_usb_power_operation_mode == "1.5A")) {
	if (!WriteStringToFile("1300000", accessoryCurrentLimitPath)) {
	ALOGI("Write 1.3A to limit current fail");
	} else {
	if (!WriteStringToFile("1", accessoryCurrentLimitEnablePath)) {
	ALOGI("Enable limit current fail");
	}
	}
	} else {
	if (!WriteStringToFile("0", accessoryCurrentLimitEnablePath))
	ALOGI("unvote accessory limit current failed");
	}

	ALOGI("Usb Gadget setcurrent functions called successfully");
	return ScopedAStatus::fromServiceSpecificErrorWithMessage(
	-1, "Usb Gadget setcurrent functions called successfully");


	error:
	ALOGI("Usb Gadget setcurrent functions failed");
	if (callback == NULL)
	return ScopedAStatus::fromServiceSpecificErrorWithMessage(
	-1, "Usb Gadget setcurrent functions failed");
	ScopedAStatus ret = callback->setCurrentUsbFunctionsCb(functions, status, in_transactionId);
	if (!ret.isOk())
	ALOGE("Error while calling setCurrentUsbFunctionsCb %s", ret.getDescription().c_str());
	return ScopedAStatus::fromServiceSpecificErrorWithMessage(
	-1, "Error while calling setCurrentUsbFunctionsCb");
	}
	} // namespace gadget
	} // namespace usb
	} // namespace hardware
	} // namespace android
	} // aidl