1 /*
2 * Copyright 2021 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 #pragma once
18
19 #include <array>
20 #include <cstddef>
21 #include <cstdint>
22 #include <sstream>
23
24 constexpr size_t kDevClassLength = 3;
25 typedef std::array<uint8_t, kDevClassLength> DEV_CLASS; /* Device class */
26
27 inline constexpr DEV_CLASS kDevClassEmpty = {};
28
29 /* 0x00 is used as unclassified for all minor device classes */
30 #define BTM_COD_MINOR_UNCLASSIFIED 0x00
31 #define BTM_COD_MINOR_WEARABLE_HEADSET 0x04
32 #define BTM_COD_MINOR_CONFM_HANDSFREE 0x08
33 #define BTM_COD_MINOR_CAR_AUDIO 0x20
34 #define BTM_COD_MINOR_SET_TOP_BOX 0x24
35
36 /* minor device class field for Peripheral Major Class */
37 /* Bits 6-7 independently specify mouse, keyboard, or combo mouse/keyboard */
38 #define BTM_COD_MINOR_KEYBOARD 0x40
39 #define BTM_COD_MINOR_POINTING 0x80
40 /* Bits 2-5 OR'd with selection from bits 6-7 */
41 /* #define BTM_COD_MINOR_UNCLASSIFIED 0x00 */
42 #define BTM_COD_MINOR_JOYSTICK 0x04
43 #define BTM_COD_MINOR_GAMEPAD 0x08
44 #define BTM_COD_MINOR_REMOTE_CONTROL 0x0C
45 #define BTM_COD_MINOR_DIGITIZING_TABLET 0x14
46 #define BTM_COD_MINOR_CARD_READER 0x18 /* e.g. SIM card reader */
47 #define BTM_COD_MINOR_DIGITAL_PAN 0x1C
48
49 /* minor device class field for Imaging Major Class */
50 /* Bits 5-7 independently specify display, camera, scanner, or printer */
51 #define BTM_COD_MINOR_DISPLAY 0x10
52 /* Bits 2-3 Reserved */
53 /* #define BTM_COD_MINOR_UNCLASSIFIED 0x00 */
54
55 /* minor device class field for Wearable Major Class */
56 /* Bits 2-7 meaningful */
57 #define BTM_COD_MINOR_WRIST_WATCH 0x04
58 #define BTM_COD_MINOR_GLASSES 0x14
59
60 /* minor device class field for Health Major Class */
61 /* Bits 2-7 meaningful */
62 #define BTM_COD_MINOR_BLOOD_MONITOR 0x04
63 #define BTM_COD_MINOR_THERMOMETER 0x08
64 #define BTM_COD_MINOR_WEIGHING_SCALE 0x0C
65 #define BTM_COD_MINOR_GLUCOSE_METER 0x10
66 #define BTM_COD_MINOR_PULSE_OXIMETER 0x14
67 #define BTM_COD_MINOR_HEART_PULSE_MONITOR 0x18
68 #define BTM_COD_MINOR_STEP_COUNTER 0x20
69
70 /***************************
71 * major device class field
72 ***************************/
73 #define BTM_COD_MAJOR_COMPUTER 0x01
74 #define BTM_COD_MAJOR_PHONE 0x02
75 #define BTM_COD_MAJOR_AUDIO 0x04
76 #define BTM_COD_MAJOR_PERIPHERAL 0x05
77 #define BTM_COD_MAJOR_IMAGING 0x06
78 #define BTM_COD_MAJOR_WEARABLE 0x07
79 #define BTM_COD_MAJOR_HEALTH 0x09
80 #define BTM_COD_MAJOR_UNCLASSIFIED 0x1F
81
82 /***************************
83 * service class fields
84 ***************************/
85 #define BTM_COD_SERVICE_LMTD_DISCOVER 0x0020
86 #define BTM_COD_SERVICE_LE_AUDIO 0x0040
87 #define BTM_COD_SERVICE_POSITIONING 0x0100
88 #define BTM_COD_SERVICE_NETWORKING 0x0200
89 #define BTM_COD_SERVICE_RENDERING 0x0400
90 #define BTM_COD_SERVICE_CAPTURING 0x0800
91 #define BTM_COD_SERVICE_OBJ_TRANSFER 0x1000
92 #define BTM_COD_SERVICE_AUDIO 0x2000
93 #define BTM_COD_SERVICE_TELEPHONY 0x4000
94 #define BTM_COD_SERVICE_INFORMATION 0x8000
95
96 /* the COD masks */
97 #define BTM_COD_MINOR_CLASS_MASK 0xFC
98 #define BTM_COD_MAJOR_CLASS_MASK 0x1F
99 #define BTM_COD_SERVICE_CLASS_LO_B 0x00E0
100 #define BTM_COD_SERVICE_CLASS_MASK 0xFFE0
101
102 inline constexpr DEV_CLASS kDevClassUnclassified = {
103 0x00, BTM_COD_MAJOR_UNCLASSIFIED, BTM_COD_MINOR_UNCLASSIFIED};
104
105 /* class of device field macros */
106 #define BTM_COD_MINOR_CLASS(u8, pd) \
107 { (u8) = (pd)[2] & BTM_COD_MINOR_CLASS_MASK; }
108 #define BTM_COD_MAJOR_CLASS(u8, pd) \
109 { (u8) = (pd)[1] & BTM_COD_MAJOR_CLASS_MASK; }
110 #define BTM_COD_SERVICE_CLASS(u16, pd) \
111 { \
112 (u16) = (pd)[0]; \
113 (u16) <<= 8; \
114 (u16) += (pd)[1] & 0xE0; \
115 }
116
117 /* to set the fields (assumes that format type is always 0) */
118 #define FIELDS_TO_COD(pd, mn, mj, sv) \
119 { \
120 (pd)[2] = mn; \
121 (pd)[1] = (mj) + ((sv)&BTM_COD_SERVICE_CLASS_LO_B); \
122 (pd)[0] = (sv) >> 8; \
123 }
124
dev_class_text(const DEV_CLASS & dev_class)125 inline std::string dev_class_text(const DEV_CLASS& dev_class) {
126 std::ostringstream oss;
127 uint16_t sv;
128 uint8_t mj, mn;
129 BTM_COD_SERVICE_CLASS(sv, dev_class);
130 BTM_COD_MAJOR_CLASS(mj, dev_class);
131 BTM_COD_MINOR_CLASS(mn, dev_class);
132 oss << std::hex << (int)sv << "-" << (int)mj << "-" << (int)mn;
133 return oss.str();
134 }
135
136 #define DEVCLASS_TO_STREAM(p, a) \
137 { \
138 size_t ijk; \
139 for (ijk = 0; ijk < kDevClassLength; ijk++) \
140 *(p)++ = (a)[kDevClassLength - 1 - ijk]; \
141 }
142
143 #define STREAM_TO_DEVCLASS(a, p) \
144 { \
145 size_t ijk; \
146 uint8_t* _pa = a.data() + kDevClassLength - 1; \
147 for (ijk = 0; ijk < kDevClassLength; ijk++) *_pa-- = *(p)++; \
148 }
149