Prototype Content Provider support for MTP/PTP devices.
At this point much of the plumbing is in place, but only a few simple queries
are supported.
This is enough to support a proof of concept sample program that navigates
the file hierarchy of a digital camera connected via USB.
Also removed obsolete ptptest host test program.
Change-Id: I17644344b9f0ce1ecc302bc0478c1f3d44a1647f
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpDevice.cpp b/media/mtp/MtpDevice.cpp
new file mode 100644
index 0000000..0282086
--- /dev/null
+++ b/media/mtp/MtpDevice.cpp
@@ -0,0 +1,230 @@
+/*
+ * 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 "MtpDevice.h"
+#include "MtpDebug.h"
+#include "MtpDeviceInfo.h"
+#include "MtpObjectInfo.h"
+#include "MtpStorageInfo.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpDevice::MtpDevice(struct usb_device* device, int interface,
+ struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
+ struct usb_endpoint *ep_intr)
+ : mDevice(device),
+ mInterface(interface),
+ mEndpointIn(ep_in),
+ mEndpointOut(ep_out),
+ mEndpointIntr(ep_intr),
+ mDeviceInfo(NULL),
+ mID(usb_device_get_unique_id(device)),
+ mSessionID(0),
+ mTransactionID(0)
+{
+}
+
+MtpDevice::~MtpDevice() {
+ close();
+}
+
+void MtpDevice::initialize() {
+ openSession();
+ mDeviceInfo = getDeviceInfo();
+ if (mDeviceInfo) {
+ mDeviceInfo->print();
+ }
+}
+
+void MtpDevice::close() {
+ if (mDevice) {
+ usb_device_release_interface(mDevice, mInterface);
+ usb_device_close(mDevice);
+ mDevice = NULL;
+ }
+}
+
+const char* MtpDevice::getDeviceName() {
+ if (mDevice)
+ return usb_device_get_name(mDevice);
+ else
+ return "???";
+}
+
+bool MtpDevice::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 MtpDevice::closeSession() {
+ // FIXME
+ return true;
+}
+
+MtpDeviceInfo* MtpDevice::getDeviceInfo() {
+ mRequest.reset();
+ if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO))
+ return NULL;
+ if (!readData())
+ return NULL;
+ MtpResponseCode ret = readResponse();
+printf("getDeviceInfo returned %04X\n", ret);
+ if (ret == MTP_RESPONSE_OK) {
+ MtpDeviceInfo* info = new MtpDeviceInfo;
+ info->read(mData);
+ return info;
+ }
+ return NULL;
+}
+
+MtpStorageIDList* MtpDevice::getStorageIDs() {
+ mRequest.reset();
+ if (!sendRequest(MTP_OPERATION_GET_STORAGE_IDS))
+ return NULL;
+ if (!readData())
+ return NULL;
+ MtpResponseCode ret = readResponse();
+ if (ret == MTP_RESPONSE_OK) {
+ return mData.getAUInt32();
+ }
+ return NULL;
+}
+
+MtpStorageInfo* MtpDevice::getStorageInfo(MtpStorageID storageID) {
+ mRequest.reset();
+ mRequest.setParameter(1, storageID);
+ if (!sendRequest(MTP_OPERATION_GET_STORAGE_INFO))
+ return NULL;
+ if (!readData())
+ return NULL;
+ MtpResponseCode ret = readResponse();
+printf("getStorageInfo returned %04X\n", ret);
+ if (ret == MTP_RESPONSE_OK) {
+ MtpStorageInfo* info = new MtpStorageInfo(storageID);
+ info->read(mData);
+ return info;
+ }
+ return NULL;
+}
+
+MtpObjectHandleList* MtpDevice::getObjectHandles(MtpStorageID storageID,
+ MtpObjectFormat format, MtpObjectHandle parent) {
+ mRequest.reset();
+ mRequest.setParameter(1, storageID);
+ mRequest.setParameter(2, format);
+ mRequest.setParameter(3, parent);
+ if (!sendRequest(MTP_OPERATION_GET_OBJECT_HANDLES))
+ return NULL;
+ if (!readData())
+ return NULL;
+ MtpResponseCode ret = readResponse();
+printf("getObjectHandles returned %04X\n", ret);
+ if (ret == MTP_RESPONSE_OK) {
+ return mData.getAUInt32();
+ }
+ return NULL;
+}
+
+MtpObjectInfo* MtpDevice::getObjectInfo(MtpObjectHandle handle) {
+ mRequest.reset();
+ mRequest.setParameter(1, handle);
+ if (!sendRequest(MTP_OPERATION_GET_OBJECT_INFO))
+ return NULL;
+ if (!readData())
+ return NULL;
+ MtpResponseCode ret = readResponse();
+printf("getObjectInfo returned %04X\n", ret);
+ if (ret == MTP_RESPONSE_OK) {
+ MtpObjectInfo* info = new MtpObjectInfo(handle);
+ info->read(mData);
+ return info;
+ }
+ return NULL;
+}
+
+bool MtpDevice::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 MtpDevice::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 MtpDevice::readData() {
+ mData.reset();
+ 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 MtpDevice::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;
+ }
+}
+
+} // namespace android