1 /* 2 * Copyright (C) 2013 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 package com.android.accessorydisplay.sink; 18 19 // Constants from kernel include/linux/usb/f_accessory.h 20 final class UsbAccessoryConstants { 21 /* Use Google Vendor ID when in accessory mode */ 22 public static final int USB_ACCESSORY_VENDOR_ID = 0x18D1; 23 24 /* Product ID to use when in accessory mode */ 25 public static final int USB_ACCESSORY_PRODUCT_ID = 0x2D00; 26 27 /* Product ID to use when in accessory mode and adb is enabled */ 28 public static final int USB_ACCESSORY_ADB_PRODUCT_ID = 0x2D01; 29 30 /* Indexes for strings sent by the host via ACCESSORY_SEND_STRING */ 31 public static final int ACCESSORY_STRING_MANUFACTURER = 0; 32 public static final int ACCESSORY_STRING_MODEL = 1; 33 public static final int ACCESSORY_STRING_DESCRIPTION = 2; 34 public static final int ACCESSORY_STRING_VERSION = 3; 35 public static final int ACCESSORY_STRING_URI = 4; 36 public static final int ACCESSORY_STRING_SERIAL = 5; 37 38 /* Control request for retrieving device's protocol version 39 * 40 * requestType: USB_DIR_IN | USB_TYPE_VENDOR 41 * request: ACCESSORY_GET_PROTOCOL 42 * value: 0 43 * index: 0 44 * data version number (16 bits little endian) 45 * 1 for original accessory support 46 * 2 adds HID and device to host audio support 47 */ 48 public static final int ACCESSORY_GET_PROTOCOL = 51; 49 50 /* Control request for host to send a string to the device 51 * 52 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 53 * request: ACCESSORY_SEND_STRING 54 * value: 0 55 * index: string ID 56 * data zero terminated UTF8 string 57 * 58 * The device can later retrieve these strings via the 59 * ACCESSORY_GET_STRING_* ioctls 60 */ 61 public static final int ACCESSORY_SEND_STRING = 52; 62 63 /* Control request for starting device in accessory mode. 64 * The host sends this after setting all its strings to the device. 65 * 66 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 67 * request: ACCESSORY_START 68 * value: 0 69 * index: 0 70 * data none 71 */ 72 public static final int ACCESSORY_START = 53; 73 74 /* Control request for registering a HID device. 75 * Upon registering, a unique ID is sent by the accessory in the 76 * value parameter. This ID will be used for future commands for 77 * the device 78 * 79 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 80 * request: ACCESSORY_REGISTER_HID_DEVICE 81 * value: Accessory assigned ID for the HID device 82 * index: total length of the HID report descriptor 83 * data none 84 */ 85 public static final int ACCESSORY_REGISTER_HID = 54; 86 87 /* Control request for unregistering a HID device. 88 * 89 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 90 * request: ACCESSORY_REGISTER_HID 91 * value: Accessory assigned ID for the HID device 92 * index: 0 93 * data none 94 */ 95 public static final int ACCESSORY_UNREGISTER_HID = 55; 96 97 /* Control request for sending the HID report descriptor. 98 * If the HID descriptor is longer than the endpoint zero max packet size, 99 * the descriptor will be sent in multiple ACCESSORY_SET_HID_REPORT_DESC 100 * commands. The data for the descriptor must be sent sequentially 101 * if multiple packets are needed. 102 * 103 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 104 * request: ACCESSORY_SET_HID_REPORT_DESC 105 * value: Accessory assigned ID for the HID device 106 * index: offset of data in descriptor 107 * (needed when HID descriptor is too big for one packet) 108 * data the HID report descriptor 109 */ 110 public static final int ACCESSORY_SET_HID_REPORT_DESC = 56; 111 112 /* Control request for sending HID events. 113 * 114 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 115 * request: ACCESSORY_SEND_HID_EVENT 116 * value: Accessory assigned ID for the HID device 117 * index: 0 118 * data the HID report for the event 119 */ 120 public static final int ACCESSORY_SEND_HID_EVENT = 57; 121 122 /* Control request for setting the audio mode. 123 * 124 * requestType: USB_DIR_OUT | USB_TYPE_VENDOR 125 * request: ACCESSORY_SET_AUDIO_MODE 126 * value: 0 - no audio 127 * 1 - device to host, 44100 16-bit stereo PCM 128 * index: 0 129 * data none 130 */ 131 public static final int ACCESSORY_SET_AUDIO_MODE = 58; 132 133 private UsbAccessoryConstants() { 134 } 135 } 136
