Mike Lockwood | e7d511e | 2010-12-30 13:39:37 -0500 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "UsbRequestJNI" |
| 18 | |
| 19 | #include "utils/Log.h" |
| 20 | |
| 21 | #include "jni.h" |
| 22 | #include "JNIHelp.h" |
| 23 | #include "android_runtime/AndroidRuntime.h" |
| 24 | |
| 25 | #include <usbhost/usbhost.h> |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | |
| 29 | using namespace android; |
| 30 | |
| 31 | static jfieldID field_context; |
| 32 | |
| 33 | struct usb_request* get_request_from_object(JNIEnv* env, jobject java_request) |
| 34 | { |
| 35 | return (struct usb_request*)env->GetIntField(java_request, field_context); |
| 36 | } |
| 37 | |
| 38 | // in android_hardware_UsbDevice.cpp |
| 39 | extern struct usb_device* get_device_from_object(JNIEnv* env, jobject java_device); |
| 40 | |
| 41 | static jboolean |
| 42 | android_hardware_UsbRequest_init(JNIEnv *env, jobject thiz, jobject java_device, |
| 43 | jint ep_address, jint ep_attributes, jint ep_max_packet_size, jint ep_interval) |
| 44 | { |
| 45 | LOGD("init\n"); |
| 46 | |
| 47 | struct usb_device* device = get_device_from_object(env, java_device); |
| 48 | if (!device) { |
| 49 | LOGE("device null in native_init"); |
| 50 | return false; |
| 51 | } |
| 52 | |
| 53 | // construct an endpoint descriptor from the Java object fields |
| 54 | struct usb_endpoint_descriptor desc; |
| 55 | desc.bLength = USB_DT_ENDPOINT_SIZE; |
| 56 | desc.bDescriptorType = USB_DT_ENDPOINT; |
| 57 | desc.bEndpointAddress = ep_address; |
| 58 | desc.bmAttributes = ep_attributes; |
| 59 | desc.wMaxPacketSize = ep_max_packet_size; |
| 60 | desc.bInterval = ep_interval; |
| 61 | |
| 62 | struct usb_request* request = usb_request_new(device, &desc); |
| 63 | if (request) |
| 64 | env->SetIntField(thiz, field_context, (int)request); |
| 65 | return (request != NULL); |
| 66 | } |
| 67 | |
| 68 | static void |
| 69 | android_hardware_UsbRequest_close(JNIEnv *env, jobject thiz) |
| 70 | { |
| 71 | LOGD("close\n"); |
| 72 | struct usb_request* request = get_request_from_object(env, thiz); |
| 73 | if (request) { |
| 74 | usb_request_free(request); |
| 75 | env->SetIntField(thiz, field_context, 0); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static jboolean |
| 80 | android_hardware_UsbRequest_queue_array(JNIEnv *env, jobject thiz, |
| 81 | jbyteArray buffer, jint length, jboolean out) |
| 82 | { |
| 83 | struct usb_request* request = get_request_from_object(env, thiz); |
| 84 | if (!request) { |
| 85 | LOGE("request is closed in native_queue"); |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | if (buffer && length) { |
| 90 | request->buffer = malloc(length); |
| 91 | if (!request->buffer) |
| 92 | return false; |
| 93 | if (out) { |
| 94 | // copy data from Java buffer to native buffer |
| 95 | env->GetByteArrayRegion(buffer, 0, length, (jbyte *)request->buffer); |
| 96 | } |
| 97 | } else { |
| 98 | request->buffer = NULL; |
| 99 | } |
| 100 | request->buffer_length = length; |
| 101 | |
| 102 | if (usb_request_queue(request)) { |
| 103 | if (request->buffer) { |
| 104 | // free our buffer if usb_request_queue fails |
| 105 | free(request->buffer); |
| 106 | request->buffer = NULL; |
| 107 | } |
| 108 | return false; |
| 109 | } else { |
| 110 | // save a reference to ourselves so UsbDevice.waitRequest() can find us |
| 111 | request->client_data = (void *)env->NewGlobalRef(thiz); |
| 112 | return true; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static void |
| 117 | android_hardware_UsbRequest_dequeue_array(JNIEnv *env, jobject thiz, |
| 118 | jbyteArray buffer, jint length, jboolean out) |
| 119 | { |
| 120 | struct usb_request* request = get_request_from_object(env, thiz); |
| 121 | if (!request) { |
| 122 | LOGE("request is closed in native_dequeue"); |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | if (buffer && length && request->buffer && !out) { |
| 127 | // copy data from native buffer to Java buffer |
| 128 | env->SetByteArrayRegion(buffer, 0, length, (jbyte *)request->buffer); |
| 129 | } |
| 130 | free(request->buffer); |
| 131 | env->DeleteGlobalRef((jobject)request->client_data); |
| 132 | |
| 133 | } |
| 134 | |
| 135 | static jboolean |
| 136 | android_hardware_UsbRequest_queue_direct(JNIEnv *env, jobject thiz, |
| 137 | jobject buffer, jint length, jboolean out) |
| 138 | { |
| 139 | struct usb_request* request = get_request_from_object(env, thiz); |
| 140 | if (!request) { |
| 141 | LOGE("request is closed in native_queue"); |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | if (buffer && length) { |
| 146 | request->buffer = env->GetDirectBufferAddress(buffer); |
| 147 | if (!request->buffer) |
| 148 | return false; |
| 149 | } else { |
| 150 | request->buffer = NULL; |
| 151 | } |
| 152 | request->buffer_length = length; |
| 153 | |
| 154 | if (usb_request_queue(request)) { |
| 155 | request->buffer = NULL; |
| 156 | return false; |
| 157 | } else { |
| 158 | // save a reference to ourselves so UsbDevice.waitRequest() can find us |
| 159 | // we also need this to make sure our native buffer is not deallocated |
| 160 | // while IO is active |
| 161 | request->client_data = (void *)env->NewGlobalRef(thiz); |
| 162 | return true; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | static void |
| 167 | android_hardware_UsbRequest_dequeue_direct(JNIEnv *env, jobject thiz) |
| 168 | { |
| 169 | struct usb_request* request = get_request_from_object(env, thiz); |
| 170 | if (!request) { |
| 171 | LOGE("request is closed in native_dequeue"); |
| 172 | return; |
| 173 | } |
| 174 | // all we need to do is delete our global ref |
| 175 | env->DeleteGlobalRef((jobject)request->client_data); |
| 176 | } |
| 177 | |
| 178 | static jboolean |
| 179 | android_hardware_UsbRequest_cancel(JNIEnv *env, jobject thiz) |
| 180 | { |
| 181 | struct usb_request* request = get_request_from_object(env, thiz); |
| 182 | if (!request) { |
| 183 | LOGE("request is closed in native_cancel"); |
| 184 | return false; |
| 185 | } |
| 186 | return (usb_request_cancel(request) == 0); |
| 187 | } |
| 188 | |
| 189 | static JNINativeMethod method_table[] = { |
| 190 | {"native_init", "(Landroid/hardware/UsbDevice;IIII)Z", |
| 191 | (void *)android_hardware_UsbRequest_init}, |
| 192 | {"native_close", "()V", (void *)android_hardware_UsbRequest_close}, |
| 193 | {"native_queue_array", "([BIZ)Z", (void *)android_hardware_UsbRequest_queue_array}, |
| 194 | {"native_dequeue_array", "([BIZ)V", (void *)android_hardware_UsbRequest_dequeue_array}, |
| 195 | {"native_queue_direct", "(Ljava/nio/ByteBuffer;IZ)Z", |
| 196 | (void *)android_hardware_UsbRequest_queue_direct}, |
| 197 | {"native_dequeue_direct", "()V", (void *)android_hardware_UsbRequest_dequeue_direct}, |
| 198 | {"native_cancel", "()Z", (void *)android_hardware_UsbRequest_cancel}, |
| 199 | }; |
| 200 | |
| 201 | int register_android_hardware_UsbRequest(JNIEnv *env) |
| 202 | { |
| 203 | jclass clazz = env->FindClass("android/hardware/UsbRequest"); |
| 204 | if (clazz == NULL) { |
| 205 | LOGE("Can't find android/hardware/UsbRequest"); |
| 206 | return -1; |
| 207 | } |
| 208 | field_context = env->GetFieldID(clazz, "mNativeContext", "I"); |
| 209 | if (field_context == NULL) { |
| 210 | LOGE("Can't find UsbRequest.mNativeContext"); |
| 211 | return -1; |
| 212 | } |
| 213 | |
| 214 | return AndroidRuntime::registerNativeMethods(env, "android/hardware/UsbRequest", |
| 215 | method_table, NELEM(method_table)); |
| 216 | } |
| 217 | |