1e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood/* 2e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * Copyright (C) 2010 The Android Open Source Project 3e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * 4e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * Licensed under the Apache License, Version 2.0 (the "License"); 5e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * you may not use this file except in compliance with the License. 6e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * You may obtain a copy of the License at 7e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * 8e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * http://www.apache.org/licenses/LICENSE-2.0 9e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * 10e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * Unless required by applicable law or agreed to in writing, software 11e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * distributed under the License is distributed on an "AS IS" BASIS, 12e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * See the License for the specific language governing permissions and 14e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood * limitations under the License. 15e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood */ 16e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 17e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#define LOG_TAG "UsbRequestJNI" 18e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 19e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include "utils/Log.h" 20e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 21e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include "jni.h" 22e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include "JNIHelp.h" 23e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include "android_runtime/AndroidRuntime.h" 24e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 25e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include <usbhost/usbhost.h> 26e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 27e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood#include <stdio.h> 28e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 29e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodusing namespace android; 30e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 31e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic jfieldID field_context; 32e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 33e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstruct usb_request* get_request_from_object(JNIEnv* env, jobject java_request) 34e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 354838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat return (struct usb_request*)env->GetLongField(java_request, field_context); 36e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 37e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 38acc29cc91be634070c92a807df412ced97b9b375Mike Lockwood// in android_hardware_UsbDeviceConnection.cpp 39acc29cc91be634070c92a807df412ced97b9b375Mike Lockwoodextern struct usb_device* get_device_from_object(JNIEnv* env, jobject connection); 40e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 41e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic jboolean 42e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_init(JNIEnv *env, jobject thiz, jobject java_device, 43e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood jint ep_address, jint ep_attributes, jint ep_max_packet_size, jint ep_interval) 44e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 455baa3a62a97544669fba6d65a11c07f252e654ddSteve Block ALOGD("init\n"); 46e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 47e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_device* device = get_device_from_object(env, java_device); 48e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!device) { 493762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("device null in native_init"); 50e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 51e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 52e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 53e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood // construct an endpoint descriptor from the Java object fields 54e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_endpoint_descriptor desc; 55e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.bLength = USB_DT_ENDPOINT_SIZE; 56e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.bDescriptorType = USB_DT_ENDPOINT; 57e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.bEndpointAddress = ep_address; 58e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.bmAttributes = ep_attributes; 59e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.wMaxPacketSize = ep_max_packet_size; 60e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood desc.bInterval = ep_interval; 61e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 62e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = usb_request_new(device, &desc); 63e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (request) 644838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat env->SetLongField(thiz, field_context, (jlong)request); 65e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return (request != NULL); 66e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 67e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 68e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic void 69e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_close(JNIEnv *env, jobject thiz) 70e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 715baa3a62a97544669fba6d65a11c07f252e654ddSteve Block ALOGD("close\n"); 72e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 73e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (request) { 74e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood usb_request_free(request); 754838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat env->SetLongField(thiz, field_context, 0); 76e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 77e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 78e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 79e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic jboolean 80e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_queue_array(JNIEnv *env, jobject thiz, 81e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood jbyteArray buffer, jint length, jboolean out) 82e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 83e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 84e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request) { 853762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("request is closed in native_queue"); 86e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 87e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 88e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 89e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (buffer && length) { 90e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = malloc(length); 91e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request->buffer) 92e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 93a3665ba95d806fcb6780d29d49bd0f1032e8bc86mike wakerly memset(request->buffer, 0, length); 94e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (out) { 95e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood // copy data from Java buffer to native buffer 96e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood env->GetByteArrayRegion(buffer, 0, length, (jbyte *)request->buffer); 97e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 98e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } else { 99e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = NULL; 100e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 101e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer_length = length; 102e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 103b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood // save a reference to ourselves so UsbDeviceConnection.waitRequest() can find us 104b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood request->client_data = (void *)env->NewGlobalRef(thiz); 105b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood 106e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (usb_request_queue(request)) { 107e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (request->buffer) { 108e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood // free our buffer if usb_request_queue fails 109e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood free(request->buffer); 110e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = NULL; 111e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 112b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood env->DeleteGlobalRef((jobject)request->client_data); 113e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 114e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 115b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood return true; 116e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 117e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 1184838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhatstatic jint 119e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_dequeue_array(JNIEnv *env, jobject thiz, 120e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood jbyteArray buffer, jint length, jboolean out) 121e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 122e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 123e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request) { 1243762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("request is closed in native_dequeue"); 1254838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat return (jint) -1; 126e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 127e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 128e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (buffer && length && request->buffer && !out) { 129e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood // copy data from native buffer to Java buffer 130e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood env->SetByteArrayRegion(buffer, 0, length, (jbyte *)request->buffer); 131e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 132e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood free(request->buffer); 133e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood env->DeleteGlobalRef((jobject)request->client_data); 1344838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat return (jint) request->actual_length; 135e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 136e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 137e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic jboolean 138e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_queue_direct(JNIEnv *env, jobject thiz, 139e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood jobject buffer, jint length, jboolean out) 140e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 141e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 142e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request) { 1433762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("request is closed in native_queue"); 144e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 145e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 146e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 147e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (buffer && length) { 148e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = env->GetDirectBufferAddress(buffer); 149e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request->buffer) 150e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 151e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } else { 152e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = NULL; 153e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 154e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer_length = length; 155e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 156b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood // save a reference to ourselves so UsbDeviceConnection.waitRequest() can find us 157b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood // we also need this to make sure our native buffer is not deallocated 158b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood // while IO is active 159b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood request->client_data = (void *)env->NewGlobalRef(thiz); 160b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood 161e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (usb_request_queue(request)) { 162e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood request->buffer = NULL; 163b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood env->DeleteGlobalRef((jobject)request->client_data); 164e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 165e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 166b2a4658a630a99b0e0ff44bc54aa5b02557a571bMike Lockwood return true; 167e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 168e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 1694838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhatstatic jint 170e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_dequeue_direct(JNIEnv *env, jobject thiz) 171e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 172e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 173e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request) { 1743762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("request is closed in native_dequeue"); 1754838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat return (jint) -1; 176e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 177e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood // all we need to do is delete our global ref 178e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood env->DeleteGlobalRef((jobject)request->client_data); 1794838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat return (jint) request->actual_length; 180e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 181e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 182e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic jboolean 183e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodandroid_hardware_UsbRequest_cancel(JNIEnv *env, jobject thiz) 184e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 185e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood struct usb_request* request = get_request_from_object(env, thiz); 186e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (!request) { 1873762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("request is closed in native_cancel"); 188e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return false; 189e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 190e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return (usb_request_cancel(request) == 0); 191e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 192e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 193e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodstatic JNINativeMethod method_table[] = { 194acc29cc91be634070c92a807df412ced97b9b375Mike Lockwood {"native_init", "(Landroid/hardware/usb/UsbDeviceConnection;IIII)Z", 195e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood (void *)android_hardware_UsbRequest_init}, 196e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood {"native_close", "()V", (void *)android_hardware_UsbRequest_close}, 197e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood {"native_queue_array", "([BIZ)Z", (void *)android_hardware_UsbRequest_queue_array}, 198a3665ba95d806fcb6780d29d49bd0f1032e8bc86mike wakerly {"native_dequeue_array", "([BIZ)I", (void *)android_hardware_UsbRequest_dequeue_array}, 199e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood {"native_queue_direct", "(Ljava/nio/ByteBuffer;IZ)Z", 200e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood (void *)android_hardware_UsbRequest_queue_direct}, 201a3665ba95d806fcb6780d29d49bd0f1032e8bc86mike wakerly {"native_dequeue_direct", "()I", (void *)android_hardware_UsbRequest_dequeue_direct}, 202e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood {"native_cancel", "()Z", (void *)android_hardware_UsbRequest_cancel}, 203e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood}; 204e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 205e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwoodint register_android_hardware_UsbRequest(JNIEnv *env) 206e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood{ 207c4308f01c965571dc2354107c3574df113e397eeMike Lockwood jclass clazz = env->FindClass("android/hardware/usb/UsbRequest"); 208e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (clazz == NULL) { 2093762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Can't find android/hardware/usb/UsbRequest"); 210e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return -1; 211e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 2124838e338129e09a37b8c8ad5e44f85ec5cd3aea1Ashok Bhat field_context = env->GetFieldID(clazz, "mNativeContext", "J"); 213e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood if (field_context == NULL) { 2143762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Can't find UsbRequest.mNativeContext"); 215e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood return -1; 216e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood } 217e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 218c4308f01c965571dc2354107c3574df113e397eeMike Lockwood return AndroidRuntime::registerNativeMethods(env, "android/hardware/usb/UsbRequest", 219e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood method_table, NELEM(method_table)); 220e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood} 221e7d511e148bc901ef41ac44d7b3593e5d803f72fMike Lockwood 222