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/*
* Copyright (C) 2010 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <usbhost/usbhost.h>
#include "MtpClient.h"
#include "MtpDebug.h"
#include "MtpStringBuffer.h"
MtpClient::MtpClient(struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
struct usb_endpoint *ep_intr)
: mEndpointIn(ep_in),
mEndpointOut(ep_out),
mEndpointIntr(ep_intr),
mSessionID(0),
mTransactionID(0)
{
}
MtpClient::~MtpClient() {
}
bool MtpClient::openSession() {
printf("openSession\n");
mSessionID = 0;
mTransactionID = 0;
MtpSessionID newSession = 1;
mRequest.reset();
mRequest.setParameter(1, newSession);
if (!sendRequest(MTP_OPERATION_OPEN_SESSION))
return false;
MtpResponseCode ret = readResponse();
if (ret == MTP_RESPONSE_SESSION_ALREADY_OPEN)
newSession = mResponse.getParameter(1);
else if (ret != MTP_RESPONSE_OK)
return false;
mSessionID = newSession;
mTransactionID = 1;
return true;
}
bool MtpClient::getDeviceInfo() {
mRequest.reset();
if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO))
return false;
if (!readData())
return false;
MtpResponseCode ret = readResponse();
if (ret == MTP_RESPONSE_OK) {
MtpStringBuffer string;
// fill in device info
printf("MTP standard version: %d\n", mData.getUInt16());
printf("MTP Vendor Extension ID: %d\n", mData.getUInt32());
printf("MTP vendor extension version: %d\n", mData.getUInt16());
mData.getString(string);
printf("vendor extension desc %s\n", (const char *)string);
return true;
}
return false;
}
bool MtpClient::closeSession() {
return true;
}
bool MtpClient::sendRequest(MtpOperationCode operation) {
printf("sendRequest: %s\n", MtpDebug::getOperationCodeName(operation));
mRequest.setOperationCode(operation);
if (mTransactionID > 0)
mRequest.setTransactionID(mTransactionID++);
int ret = mRequest.write(mEndpointOut);
mRequest.dump();
return (ret > 0);
}
bool MtpClient::sendData(MtpOperationCode operation) {
printf("sendData\n");
mData.setOperationCode(mRequest.getOperationCode());
mData.setTransactionID(mRequest.getTransactionID());
int ret = mData.write(mEndpointOut);
mData.dump();
return (ret > 0);
}
bool MtpClient::readData() {
int ret = mData.read(mEndpointIn);
printf("readData returned %d\n", ret);
if (ret >= MTP_CONTAINER_HEADER_SIZE) {
mData.dump();
return true;
}
else {
printf("readResponse failed\n");
return false;
}
}
MtpResponseCode MtpClient::readResponse() {
printf("readResponse\n");
int ret = mResponse.read(mEndpointIn);
if (ret >= MTP_CONTAINER_HEADER_SIZE) {
mResponse.dump();
return mResponse.getResponseCode();
}
else {
printf("readResponse failed\n");
return -1;
}
}
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