MTP FFS updates:
This update splits old MTP code and new MTP code from Google
into two trees, legacy and ffs. Depending on the SDK level,
the build system will select the correct version. The reason
for separating the versions out are due to older android trees
not supporting the updated MTP code from Google.
Most MTP code is from Google, with additions needed from
implementing the Java functions in C++ for TWRP and FFS.
We assume if you are in android-9.0 or above, your kernel
has support for FFS over MTP. Verify that your init.rc
is mounting the MTP FFS driver to the proper location.
Change-Id: I4b107b239bd9bc5699527f9c8c77d9079f264a7e
diff --git a/mtp/ffs/MtpPacket.cpp b/mtp/ffs/MtpPacket.cpp
new file mode 100644
index 0000000..9d6f875
--- /dev/null
+++ b/mtp/ffs/MtpPacket.cpp
@@ -0,0 +1,162 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "MtpPacket"
+
+#include "MtpDebug.h"
+#include "MtpPacket.h"
+#include "mtp.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <usbhost/usbhost.h>
+
+MtpPacket::MtpPacket(int bufferSize)
+ : mBuffer(NULL),
+ mBufferSize(bufferSize),
+ mAllocationIncrement(bufferSize),
+ mPacketSize(0)
+{
+ mBuffer = (uint8_t *)malloc(bufferSize);
+ if (!mBuffer) {
+ MTPE("out of memory!");
+ abort();
+ }
+}
+
+MtpPacket::~MtpPacket() {
+ if (mBuffer)
+ free(mBuffer);
+}
+
+void MtpPacket::reset() {
+ allocate(MTP_CONTAINER_HEADER_SIZE);
+ mPacketSize = MTP_CONTAINER_HEADER_SIZE;
+ memset(mBuffer, 0, mBufferSize);
+}
+
+void MtpPacket::allocate(size_t length) {
+ if (length > mBufferSize) {
+ int newLength = length + mAllocationIncrement;
+ mBuffer = (uint8_t *)realloc(mBuffer, newLength);
+ if (!mBuffer) {
+ MTPE("out of memory!");
+ abort();
+ }
+ mBufferSize = newLength;
+ }
+}
+
+void MtpPacket::dump() {
+#define DUMP_BYTES_PER_ROW 16
+ char buffer[500];
+ char* bufptr = buffer;
+
+ for (size_t i = 0; i < mPacketSize; i++) {
+ bufptr += snprintf(bufptr, sizeof(buffer) - (bufptr - buffer), "%02X ",
+ mBuffer[i]);
+ if (i % DUMP_BYTES_PER_ROW == (DUMP_BYTES_PER_ROW - 1)) {
+ ALOGV("%s", buffer);
+ bufptr = buffer;
+ }
+ }
+ if (bufptr != buffer) {
+ // print last line
+ ALOGV("%s", buffer);
+ }
+ ALOGV("\n");
+}
+
+void MtpPacket::copyFrom(const MtpPacket& src) {
+ int length = src.mPacketSize;
+ allocate(length);
+ mPacketSize = length;
+ memcpy(mBuffer, src.mBuffer, length);
+}
+
+uint16_t MtpPacket::getUInt16(int offset) const {
+ return ((uint16_t)mBuffer[offset + 1] << 8) | (uint16_t)mBuffer[offset];
+}
+
+uint32_t MtpPacket::getUInt32(int offset) const {
+ return ((uint32_t)mBuffer[offset + 3] << 24) | ((uint32_t)mBuffer[offset + 2] << 16) |
+ ((uint32_t)mBuffer[offset + 1] << 8) | (uint32_t)mBuffer[offset];
+}
+
+void MtpPacket::putUInt16(int offset, uint16_t value) {
+ mBuffer[offset++] = (uint8_t)(value & 0xFF);
+ mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
+}
+
+void MtpPacket::putUInt32(int offset, uint32_t value) {
+ mBuffer[offset++] = (uint8_t)(value & 0xFF);
+ mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
+ mBuffer[offset++] = (uint8_t)((value >> 16) & 0xFF);
+ mBuffer[offset++] = (uint8_t)((value >> 24) & 0xFF);
+}
+
+uint16_t MtpPacket::getContainerCode() const {
+ return getUInt16(MTP_CONTAINER_CODE_OFFSET);
+}
+
+void MtpPacket::setContainerCode(uint16_t code) {
+ putUInt16(MTP_CONTAINER_CODE_OFFSET, code);
+}
+
+uint16_t MtpPacket::getContainerType() const {
+ return getUInt16(MTP_CONTAINER_TYPE_OFFSET);
+}
+
+MtpTransactionID MtpPacket::getTransactionID() const {
+ return getUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET);
+}
+
+void MtpPacket::setTransactionID(MtpTransactionID id) {
+ putUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET, id);
+}
+
+uint32_t MtpPacket::getParameter(int index) const {
+ if (index < 1 || index > 5) {
+ MTPE("index %d out of range in MtpPacket::getParameter", index);
+ return 0;
+ }
+ return getUInt32(MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t));
+}
+
+void MtpPacket::setParameter(int index, uint32_t value) {
+ if (index < 1 || index > 5) {
+ MTPE("index %d out of range in MtpPacket::setParameter", index);
+ return;
+ }
+ int offset = MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t);
+ if (mPacketSize < offset + sizeof(uint32_t))
+ mPacketSize = offset + sizeof(uint32_t);
+ putUInt32(offset, value);
+}
+
+#ifdef MTP_HOST
+int MtpPacket::transfer(struct usb_request* request) {
+ int result = usb_device_bulk_transfer(request->dev,
+ request->endpoint,
+ request->buffer,
+ request->buffer_length,
+ 0);
+ request->actual_length = result;
+ return result;
+}
+#endif