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 "UsbHostManagerJNI"
18 #include "utils/Log.h"
19
20 #include "jni.h"
21 #include "JNIHelp.h"
22 #include "android_runtime/AndroidRuntime.h"
23 #include "android_runtime/Log.h"
24
25 #include <usbhost/usbhost.h>
26
27 #include <stdio.h>
28 #include <asm/byteorder.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32 #include <sys/ioctl.h>
33
34 namespace android
35 {
36
37 static struct parcel_file_descriptor_offsets_t
38 {
39 jclass mClass;
40 jmethodID mConstructor;
41 } gParcelFileDescriptorOffsets;
42
43 static jmethodID method_beginUsbDeviceAdded;
44 static jmethodID method_addUsbConfiguration;
45 static jmethodID method_addUsbInterface;
46 static jmethodID method_addUsbEndpoint;
47 static jmethodID method_endUsbDeviceAdded;
48 static jmethodID method_usbDeviceRemoved;
49
checkAndClearExceptionFromCallback(JNIEnv * env,const char * methodName)50 static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
51 if (env->ExceptionCheck()) {
52 ALOGE("An exception was thrown by callback '%s'.", methodName);
53 LOGE_EX(env);
54 env->ExceptionClear();
55 }
56 }
57
usb_device_added(const char * devname,void * client_data)58 static int usb_device_added(const char *devname, void* client_data) {
59 struct usb_descriptor_header* desc;
60 struct usb_descriptor_iter iter;
61
62 struct usb_device *device = usb_device_open(devname);
63 if (!device) {
64 ALOGE("usb_device_open failed\n");
65 return 0;
66 }
67
68 JNIEnv* env = AndroidRuntime::getJNIEnv();
69 jobject thiz = (jobject)client_data;
70 const usb_device_descriptor* deviceDesc = usb_device_get_device_descriptor(device);
71
72 char *manufacturer = usb_device_get_manufacturer_name(device);
73 char *product = usb_device_get_product_name(device);
74 char *serial = usb_device_get_serial(device);
75
76 jstring deviceName = env->NewStringUTF(devname);
77 jstring manufacturerName = AndroidRuntime::NewStringLatin1(env, manufacturer);
78 jstring productName = AndroidRuntime::NewStringLatin1(env, product);
79 jstring serialNumber = AndroidRuntime::NewStringLatin1(env, serial);
80
81 jboolean result = env->CallBooleanMethod(thiz, method_beginUsbDeviceAdded,
82 deviceName, usb_device_get_vendor_id(device), usb_device_get_product_id(device),
83 deviceDesc->bDeviceClass, deviceDesc->bDeviceSubClass, deviceDesc->bDeviceProtocol,
84 manufacturerName, productName, serialNumber);
85
86 env->DeleteLocalRef(serialNumber);
87 env->DeleteLocalRef(productName);
88 env->DeleteLocalRef(manufacturerName);
89 env->DeleteLocalRef(deviceName);
90 free(manufacturer);
91 free(product);
92 free(serial);
93
94 if (!result) goto fail;
95
96 usb_descriptor_iter_init(device, &iter);
97
98 while ((desc = usb_descriptor_iter_next(&iter)) != NULL) {
99 if (desc->bDescriptorType == USB_DT_CONFIG) {
100 struct usb_config_descriptor *config = (struct usb_config_descriptor *)desc;
101 char *name = usb_device_get_string(device, config->iConfiguration);
102 jstring configName = AndroidRuntime::NewStringLatin1(env, name);
103
104 env->CallVoidMethod(thiz, method_addUsbConfiguration,
105 config->bConfigurationValue, configName, config->bmAttributes,
106 config->bMaxPower);
107
108 env->DeleteLocalRef(configName);
109 free(name);
110 } else if (desc->bDescriptorType == USB_DT_INTERFACE) {
111 struct usb_interface_descriptor *interface = (struct usb_interface_descriptor *)desc;
112 char *name = usb_device_get_string(device, interface->iInterface);
113 jstring interfaceName = AndroidRuntime::NewStringLatin1(env, name);
114
115 env->CallVoidMethod(thiz, method_addUsbInterface,
116 interface->bInterfaceNumber, interfaceName, interface->bAlternateSetting,
117 interface->bInterfaceClass, interface->bInterfaceSubClass,
118 interface->bInterfaceProtocol);
119
120 env->DeleteLocalRef(interfaceName);
121 free(name);
122 } else if (desc->bDescriptorType == USB_DT_ENDPOINT) {
123 struct usb_endpoint_descriptor *endpoint = (struct usb_endpoint_descriptor *)desc;
124
125 env->CallVoidMethod(thiz, method_addUsbEndpoint,
126 endpoint->bEndpointAddress, endpoint->bmAttributes,
127 __le16_to_cpu(endpoint->wMaxPacketSize), endpoint->bInterval);
128 }
129 }
130
131 env->CallVoidMethod(thiz, method_endUsbDeviceAdded);
132
133 fail:
134 usb_device_close(device);
135 checkAndClearExceptionFromCallback(env, __FUNCTION__);
136
137 return 0;
138 }
139
usb_device_removed(const char * devname,void * client_data)140 static int usb_device_removed(const char *devname, void* client_data) {
141 JNIEnv* env = AndroidRuntime::getJNIEnv();
142 jobject thiz = (jobject)client_data;
143
144 jstring deviceName = env->NewStringUTF(devname);
145 env->CallVoidMethod(thiz, method_usbDeviceRemoved, deviceName);
146 env->DeleteLocalRef(deviceName);
147 checkAndClearExceptionFromCallback(env, __FUNCTION__);
148 return 0;
149 }
150
android_server_UsbHostManager_monitorUsbHostBus(JNIEnv * env,jobject thiz)151 static void android_server_UsbHostManager_monitorUsbHostBus(JNIEnv *env, jobject thiz)
152 {
153 struct usb_host_context* context = usb_host_init();
154 if (!context) {
155 ALOGE("usb_host_init failed");
156 return;
157 }
158 // this will never return so it is safe to pass thiz directly
159 usb_host_run(context, usb_device_added, usb_device_removed, NULL, (void *)thiz);
160 }
161
android_server_UsbHostManager_openDevice(JNIEnv * env,jobject thiz,jstring deviceName)162 static jobject android_server_UsbHostManager_openDevice(JNIEnv *env, jobject thiz, jstring deviceName)
163 {
164 const char *deviceNameStr = env->GetStringUTFChars(deviceName, NULL);
165 struct usb_device* device = usb_device_open(deviceNameStr);
166 env->ReleaseStringUTFChars(deviceName, deviceNameStr);
167
168 if (!device)
169 return NULL;
170
171 int fd = usb_device_get_fd(device);
172 if (fd < 0) {
173 usb_device_close(device);
174 return NULL;
175 }
176 int newFD = dup(fd);
177 usb_device_close(device);
178
179 jobject fileDescriptor = jniCreateFileDescriptor(env, newFD);
180 if (fileDescriptor == NULL) {
181 return NULL;
182 }
183 return env->NewObject(gParcelFileDescriptorOffsets.mClass,
184 gParcelFileDescriptorOffsets.mConstructor, fileDescriptor);
185 }
186
187 static JNINativeMethod method_table[] = {
188 { "monitorUsbHostBus", "()V", (void*)android_server_UsbHostManager_monitorUsbHostBus },
189 { "nativeOpenDevice", "(Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;",
190 (void*)android_server_UsbHostManager_openDevice },
191 };
192
register_android_server_UsbHostManager(JNIEnv * env)193 int register_android_server_UsbHostManager(JNIEnv *env)
194 {
195 jclass clazz = env->FindClass("com/android/server/usb/UsbHostManager");
196 if (clazz == NULL) {
197 ALOGE("Can't find com/android/server/usb/UsbHostManager");
198 return -1;
199 }
200 method_beginUsbDeviceAdded = env->GetMethodID(clazz, "beginUsbDeviceAdded",
201 "(Ljava/lang/String;IIIIILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)Z");
202 if (method_beginUsbDeviceAdded == NULL) {
203 ALOGE("Can't find beginUsbDeviceAdded");
204 return -1;
205 }
206 method_addUsbConfiguration = env->GetMethodID(clazz, "addUsbConfiguration",
207 "(ILjava/lang/String;II)V");
208 if (method_addUsbConfiguration == NULL) {
209 ALOGE("Can't find addUsbConfiguration");
210 return -1;
211 }
212 method_addUsbInterface = env->GetMethodID(clazz, "addUsbInterface",
213 "(ILjava/lang/String;IIII)V");
214 if (method_addUsbInterface == NULL) {
215 ALOGE("Can't find addUsbInterface");
216 return -1;
217 }
218 method_addUsbEndpoint = env->GetMethodID(clazz, "addUsbEndpoint", "(IIII)V");
219 if (method_addUsbEndpoint == NULL) {
220 ALOGE("Can't find addUsbEndpoint");
221 return -1;
222 }
223 method_endUsbDeviceAdded = env->GetMethodID(clazz, "endUsbDeviceAdded", "()V");
224 if (method_endUsbDeviceAdded == NULL) {
225 ALOGE("Can't find endUsbDeviceAdded");
226 return -1;
227 }
228 method_usbDeviceRemoved = env->GetMethodID(clazz, "usbDeviceRemoved",
229 "(Ljava/lang/String;)V");
230 if (method_usbDeviceRemoved == NULL) {
231 ALOGE("Can't find usbDeviceRemoved");
232 return -1;
233 }
234
235 clazz = env->FindClass("android/os/ParcelFileDescriptor");
236 LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor");
237 gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
238 gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>",
239 "(Ljava/io/FileDescriptor;)V");
240 LOG_FATAL_IF(gParcelFileDescriptorOffsets.mConstructor == NULL,
241 "Unable to find constructor for android.os.ParcelFileDescriptor");
242
243 return jniRegisterNativeMethods(env, "com/android/server/usb/UsbHostManager",
244 method_table, NELEM(method_table));
245 }
246
247 };
248