Mike Lockwood | acc29cc | 2011-03-11 08:18:08 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 "UsbDeviceConnectionJNI" |
| 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 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <fcntl.h> |
| 31 | |
| 32 | using namespace android; |
| 33 | |
| 34 | static jfieldID field_context; |
| 35 | |
| 36 | struct usb_device* get_device_from_object(JNIEnv* env, jobject connection) |
| 37 | { |
| 38 | return (struct usb_device*)env->GetIntField(connection, field_context); |
| 39 | } |
| 40 | |
| 41 | static jboolean |
| 42 | android_hardware_UsbDeviceConnection_open(JNIEnv *env, jobject thiz, jstring deviceName, |
| 43 | jobject fileDescriptor) |
| 44 | { |
| 45 | int fd = getParcelFileDescriptorFD(env, fileDescriptor); |
| 46 | // duplicate the file descriptor, since ParcelFileDescriptor will eventually close its copy |
| 47 | fd = dup(fd); |
| 48 | if (fd < 0) |
| 49 | return false; |
| 50 | |
| 51 | const char *deviceNameStr = env->GetStringUTFChars(deviceName, NULL); |
| 52 | struct usb_device* device = usb_device_new(deviceNameStr, fd); |
| 53 | if (device) { |
| 54 | env->SetIntField(thiz, field_context, (int)device); |
| 55 | } else { |
| 56 | LOGE("usb_device_open failed for %s", deviceNameStr); |
| 57 | close(fd); |
| 58 | } |
| 59 | |
| 60 | env->ReleaseStringUTFChars(deviceName, deviceNameStr); |
| 61 | return (device != NULL); |
| 62 | } |
| 63 | |
| 64 | static void |
| 65 | android_hardware_UsbDeviceConnection_close(JNIEnv *env, jobject thiz) |
| 66 | { |
| 67 | LOGD("close\n"); |
| 68 | struct usb_device* device = get_device_from_object(env, thiz); |
| 69 | if (device) { |
| 70 | usb_device_close(device); |
| 71 | env->SetIntField(thiz, field_context, 0); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | static jint |
| 76 | android_hardware_UsbDeviceConnection_get_fd(JNIEnv *env, jobject thiz) |
| 77 | { |
| 78 | struct usb_device* device = get_device_from_object(env, thiz); |
| 79 | if (!device) { |
| 80 | LOGE("device is closed in native_get_fd"); |
| 81 | return -1; |
| 82 | } |
| 83 | return usb_device_get_fd(device); |
| 84 | } |
| 85 | |
| 86 | static jboolean |
| 87 | android_hardware_UsbDeviceConnection_claim_interface(JNIEnv *env, jobject thiz, |
| 88 | int interfaceID, jboolean force) |
| 89 | { |
| 90 | struct usb_device* device = get_device_from_object(env, thiz); |
| 91 | if (!device) { |
| 92 | LOGE("device is closed in native_claim_interface"); |
| 93 | return -1; |
| 94 | } |
| 95 | |
| 96 | int ret = usb_device_claim_interface(device, interfaceID); |
| 97 | if (ret && force && errno == EBUSY) { |
| 98 | // disconnect kernel driver and try again |
| 99 | usb_device_connect_kernel_driver(device, interfaceID, false); |
| 100 | ret = usb_device_claim_interface(device, interfaceID); |
| 101 | } |
| 102 | return ret == 0; |
| 103 | } |
| 104 | |
| 105 | static jint |
| 106 | android_hardware_UsbDeviceConnection_release_interface(JNIEnv *env, jobject thiz, int interfaceID) |
| 107 | { |
| 108 | struct usb_device* device = get_device_from_object(env, thiz); |
| 109 | if (!device) { |
| 110 | LOGE("device is closed in native_release_interface"); |
| 111 | return -1; |
| 112 | } |
| 113 | int ret = usb_device_release_interface(device, interfaceID); |
| 114 | if (ret == 0) { |
| 115 | // allow kernel to reconnect its driver |
| 116 | usb_device_connect_kernel_driver(device, interfaceID, true); |
| 117 | } |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | static jint |
| 122 | android_hardware_UsbDeviceConnection_control_request(JNIEnv *env, jobject thiz, |
| 123 | jint requestType, jint request, jint value, jint index, |
| 124 | jbyteArray buffer, jint length, jint timeout) |
| 125 | { |
| 126 | struct usb_device* device = get_device_from_object(env, thiz); |
| 127 | if (!device) { |
| 128 | LOGE("device is closed in native_control_request"); |
| 129 | return -1; |
| 130 | } |
| 131 | |
| 132 | jbyte* bufferBytes = NULL; |
| 133 | if (buffer) { |
| 134 | if (env->GetArrayLength(buffer) < length) { |
| 135 | env->ThrowNew(env->FindClass("java/lang/ArrayIndexOutOfBoundsException"), NULL); |
| 136 | return -1; |
| 137 | } |
| 138 | bufferBytes = env->GetByteArrayElements(buffer, 0); |
| 139 | } |
| 140 | |
| 141 | jint result = usb_device_control_transfer(device, requestType, request, |
| 142 | value, index, bufferBytes, length, timeout); |
| 143 | |
| 144 | if (bufferBytes) |
| 145 | env->ReleaseByteArrayElements(buffer, bufferBytes, 0); |
| 146 | |
| 147 | return result; |
| 148 | } |
| 149 | |
| 150 | static jint |
| 151 | android_hardware_UsbDeviceConnection_bulk_request(JNIEnv *env, jobject thiz, |
| 152 | jint endpoint, jbyteArray buffer, jint length, jint timeout) |
| 153 | { |
| 154 | struct usb_device* device = get_device_from_object(env, thiz); |
| 155 | if (!device) { |
| 156 | LOGE("device is closed in native_control_request"); |
| 157 | return -1; |
| 158 | } |
| 159 | |
| 160 | jbyte* bufferBytes = NULL; |
| 161 | if (buffer) { |
| 162 | if (env->GetArrayLength(buffer) < length) { |
| 163 | env->ThrowNew(env->FindClass("java/lang/ArrayIndexOutOfBoundsException"), NULL); |
| 164 | return -1; |
| 165 | } |
| 166 | bufferBytes = env->GetByteArrayElements(buffer, 0); |
| 167 | } |
| 168 | |
| 169 | jint result = usb_device_bulk_transfer(device, endpoint, bufferBytes, length, timeout); |
| 170 | |
| 171 | if (bufferBytes) |
| 172 | env->ReleaseByteArrayElements(buffer, bufferBytes, 0); |
| 173 | |
| 174 | return result; |
| 175 | } |
| 176 | |
| 177 | static jobject |
| 178 | android_hardware_UsbDeviceConnection_request_wait(JNIEnv *env, jobject thiz) |
| 179 | { |
| 180 | struct usb_device* device = get_device_from_object(env, thiz); |
| 181 | if (!device) { |
| 182 | LOGE("device is closed in native_request_wait"); |
| 183 | return NULL; |
| 184 | } |
| 185 | |
| 186 | struct usb_request* request = usb_request_wait(device); |
| 187 | if (request) |
| 188 | return (jobject)request->client_data; |
| 189 | else |
| 190 | return NULL; |
| 191 | } |
| 192 | |
| 193 | static jstring |
| 194 | android_hardware_UsbDeviceConnection_get_serial(JNIEnv *env, jobject thiz) |
| 195 | { |
| 196 | struct usb_device* device = get_device_from_object(env, thiz); |
| 197 | if (!device) { |
| 198 | LOGE("device is closed in native_request_wait"); |
| 199 | return NULL; |
| 200 | } |
| 201 | char* serial = usb_device_get_serial(device); |
| 202 | if (!serial) |
| 203 | return NULL; |
| 204 | jstring result = env->NewStringUTF(serial); |
| 205 | free(serial); |
| 206 | return result; |
| 207 | } |
| 208 | |
| 209 | static JNINativeMethod method_table[] = { |
| 210 | {"native_open", "(Ljava/lang/String;Ljava/io/FileDescriptor;)Z", |
| 211 | (void *)android_hardware_UsbDeviceConnection_open}, |
| 212 | {"native_close", "()V", (void *)android_hardware_UsbDeviceConnection_close}, |
| 213 | {"native_get_fd", "()I", (void *)android_hardware_UsbDeviceConnection_get_fd}, |
| 214 | {"native_claim_interface", "(IZ)Z",(void *)android_hardware_UsbDeviceConnection_claim_interface}, |
| 215 | {"native_release_interface","(I)Z", (void *)android_hardware_UsbDeviceConnection_release_interface}, |
| 216 | {"native_control_request", "(IIII[BII)I", |
| 217 | (void *)android_hardware_UsbDeviceConnection_control_request}, |
| 218 | {"native_bulk_request", "(I[BII)I", |
| 219 | (void *)android_hardware_UsbDeviceConnection_bulk_request}, |
| 220 | {"native_request_wait", "()Landroid/hardware/usb/UsbRequest;", |
| 221 | (void *)android_hardware_UsbDeviceConnection_request_wait}, |
| 222 | { "native_get_serial", "()Ljava/lang/String;", |
| 223 | (void*)android_hardware_UsbDeviceConnection_get_serial }, |
| 224 | }; |
| 225 | |
| 226 | int register_android_hardware_UsbDeviceConnection(JNIEnv *env) |
| 227 | { |
| 228 | jclass clazz = env->FindClass("android/hardware/usb/UsbDeviceConnection"); |
| 229 | if (clazz == NULL) { |
| 230 | LOGE("Can't find android/hardware/usb/UsbDeviceConnection"); |
| 231 | return -1; |
| 232 | } |
| 233 | field_context = env->GetFieldID(clazz, "mNativeContext", "I"); |
| 234 | if (field_context == NULL) { |
| 235 | LOGE("Can't find UsbDeviceConnection.mNativeContext"); |
| 236 | return -1; |
| 237 | } |
| 238 | |
| 239 | return AndroidRuntime::registerNativeMethods(env, "android/hardware/usb/UsbDeviceConnection", |
| 240 | method_table, NELEM(method_table)); |
| 241 | } |
| 242 | |