Checkpoint work on MTP and PTP investigation.

This change includes work in progress on a C++ library for both host and device
MTP and PTP support.
Currently the makefile builds two test programs:

mtptest - a command line test program that implements a small subset of device side MTP.
Requires a kernel driver that has not been checked in yet.

ptptest - a host tool to test USB host support for detecting and communicating with
digital cameras over PTP.  Runs on Linux host.

Later this will be reformulated as a native library that will be used in the media process.

Change-Id: I81aab279975b600b59d99013ab97f9adf0b58da7
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/media/mtp/mtptest.cpp b/media/mtp/mtptest.cpp
new file mode 100644
index 0000000..8996458
--- /dev/null
+++ b/media/mtp/mtptest.cpp
@@ -0,0 +1,62 @@
+/*
+ * 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 "mtp_usb"
+#include "cutils/log.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "MtpServer.h"
+#include "MtpStorage.h"
+
+
+static void enable_usb_function(const char* name, bool enable) {
+    char    path[PATH_MAX];
+
+    snprintf(path, sizeof(path), "/sys/class/usb_composite/%s/enable", name);
+    int fd = open(path, O_RDWR);
+    if (fd < 0) {
+        fprintf(stderr, "could not open %s in enable_usb_function\n", path);
+        exit(1);
+    }
+    write(fd, enable ? "1" : "0", 2);
+    close(fd);
+}
+
+int main() {
+    // first disable UMS and enable MTP USB functions
+    enable_usb_function("usb_mass_storage", false);
+    enable_usb_function("mtp", true);
+
+    int fd = open("/dev/mtp_usb", O_RDWR);
+    printf("open returned %d\n", fd);
+    if (fd < 0) {
+        fprintf(stderr, "could not open MTP driver\n");
+        return -1;
+    }
+
+    MtpServer   server(fd, "/data/data/mtp/mtp.db");
+    server.addStorage("/sdcard");
+    server.scanStorage();
+    server.run();
+
+    close(fd);
+    return 0;
+}
+