1 ==========================
2 ALPS HID Touchpad Protocol
3 ==========================
4
5 Introduction
6 ------------
7 Currently ALPS HID driver supports U1 Touchpad
8
9 U1 device basic information.
10
11 ========== ======
12 Vendor ID 0x044E
13 Product ID 0x120B
14 Version ID 0x0121
15 ========== ======
16
17
18 HID Descriptor
19 --------------
20
21 ======= ==================== ===== ======
22 Byte Field Value Notes
23 ======= ==================== ===== ======
24 0 wHIDDescLength 001E Length
25 2 bcdVersion 0100 Compli
26 4 wReportDescLength 00B2 Report
27 6 wReportDescRegister 0002 Identi
28 8 wInputRegister 0003 Identi
29 10 wMaxInputLength 0053 Input
30 12 wOutputRegister 0000 Identi
31 14 wMaxOutputLength 0000 No Out
32 16 wCommandRegister 0005 Identi
33 18 wDataRegister 0006 Identi
34 20 wVendorID 044E Vendor
35 22 wProductID 120B Produc
36 24 wVersionID 0121 Versio
37 26 RESERVED 0000 RESERV
38 ======= ==================== ===== ======
39
40
41 Report ID
42 ---------
43
44 ========== ================= ===========
45 ReportID-1 (Input Reports) (HIDUsage-M
46 ReportID-2 (Input Reports) (HIDUsage-k
47 ReportID-3 (Input Reports) (Vendor Usa
48 ReportID-4 (Input Reports) (Vendor Usa
49 ReportID-5 (Feature Reports) Feature Rep
50 ReportID-6 (Input Reports) (Vendor Usa
51 ReportID-7 (Feature Reports) Flash updat
52 ========== ================= ===========
53
54
55 Data pattern
56 ------------
57
58 ===== ========== ===== ==============
59 Case1 ReportID_1 TP/SP Relative/Relat
60 Case2 ReportID_3 TP Absolute
61 ReportID_6 SP Absolute
62 ===== ========== ===== ==============
63
64
65 Command Read/Write
66 ------------------
67 To read/write to RAM, need to send a command t
68
69 The command format is as below.
70
71 DataByte(SET_REPORT)
72
73 ===== ======================
74 Byte1 Command Byte
75 Byte2 Address - Byte 0 (LSB)
76 Byte3 Address - Byte 1
77 Byte4 Address - Byte 2
78 Byte5 Address - Byte 3 (MSB)
79 Byte6 Value Byte
80 Byte7 Checksum
81 ===== ======================
82
83 Command Byte is read=0xD1/write=0xD2.
84
85 Address is read/write RAM address.
86
87 Value Byte is writing data when you send the w
88
89 When you read RAM, there is no meaning.
90
91 DataByte(GET_REPORT)
92
93 ===== ======================
94 Byte1 Response Byte
95 Byte2 Address - Byte 0 (LSB)
96 Byte3 Address - Byte 1
97 Byte4 Address - Byte 2
98 Byte5 Address - Byte 3 (MSB)
99 Byte6 Value Byte
100 Byte7 Checksum
101 ===== ======================
102
103 Read value is stored in Value Byte.
104
105
106 Packet Format
107 Touchpad data byte
108 ------------------
109
110
111 ======= ======= ======= ======= ======= ======
112 - b7 b6 b5 b4 b3
113 ======= ======= ======= ======= ======= ======
114 1 0 0 SW6 SW5 SW4
115 2 0 0 0 Fcv Fn3
116 3 Xa0_7 Xa0_6 Xa0_5 Xa0_4 Xa0_3
117 4 Xa0_15 Xa0_14 Xa0_13 Xa0_12 Xa0_11
118 5 Ya0_7 Ya0_6 Ya0_5 Ya0_4 Ya0_3
119 6 Ya0_15 Ya0_14 Ya0_13 Ya0_12 Ya0_11
120 7 LFB0 Zs0_6 Zs0_5 Zs0_4 Zs0_3
121
122 8 Xa1_7 Xa1_6 Xa1_5 Xa1_4 Xa1_3
123 9 Xa1_15 Xa1_14 Xa1_13 Xa1_12 Xa1_11
124 10 Ya1_7 Ya1_6 Ya1_5 Ya1_4 Ya1_3
125 11 Ya1_15 Ya1_14 Ya1_13 Ya1_12 Ya1_11
126 12 LFB1 Zs1_6 Zs1_5 Zs1_4 Zs1_3
127
128 13 Xa2_7 Xa2_6 Xa2_5 Xa2_4 Xa2_3
129 14 Xa2_15 Xa2_14 Xa2_13 Xa2_12 Xa2_11
130 15 Ya2_7 Ya2_6 Ya2_5 Ya2_4 Ya2_3
131 16 Ya2_15 Ya2_14 Ya2_13 Ya2_12 Ya2_11
132 17 LFB2 Zs2_6 Zs2_5 Zs2_4 Zs2_3
133
134 18 Xa3_7 Xa3_6 Xa3_5 Xa3_4 Xa3_3
135 19 Xa3_15 Xa3_14 Xa3_13 Xa3_12 Xa3_11
136 20 Ya3_7 Ya3_6 Ya3_5 Ya3_4 Ya3_3
137 21 Ya3_15 Ya3_14 Ya3_13 Ya3_12 Ya3_11
138 22 LFB3 Zs3_6 Zs3_5 Zs3_4 Zs3_3
139
140 23 Xa4_7 Xa4_6 Xa4_5 Xa4_4 Xa4_3
141 24 Xa4_15 Xa4_14 Xa4_13 Xa4_12 Xa4_11
142 25 Ya4_7 Ya4_6 Ya4_5 Ya4_4 Ya4_3
143 26 Ya4_15 Ya4_14 Ya4_13 Ya4_12 Ya4_11
144 27 LFB4 Zs4_6 Zs4_5 Zs4_4 Zs4_3
145 ======= ======= ======= ======= ======= ======
146
147
148 SW1-SW6:
149 SW ON/OFF status
150 Xan_15-0(16bit):
151 X Absolute data of the "n"th finger
152 Yan_15-0(16bit):
153 Y Absolute data of the "n"th finger
154 Zsn_6-0(7bit):
155 Operation area of the "n"th finger
156
157
158 StickPointer data byte
159 ----------------------
160
161 ======= ======= ======= ======= ======= ======
162 - b7 b6 b5 b4 b3
163 ======= ======= ======= ======= ======= ======
164 Byte1 1 1 1 0 1
165 Byte2 X7 X6 X5 X4 X3
166 Byte3 X15 X14 X13 X12 X11
167 Byte4 Y7 Y6 Y5 Y4 Y3
168 Byte5 Y15 Y14 Y13 Y12 Y11
169 Byte6 Z7 Z6 Z5 Z4 Z3
170 Byte7 T&P Z14 Z13 Z12 Z11
171 ======= ======= ======= ======= ======= ======
172
173 SW1-SW3:
174 SW ON/OFF status
175 Xn_15-0(16bit):
176 X Absolute data
177 Yn_15-0(16bit):
178 Y Absolute data
179 Zn_14-0(15bit):
180 Z
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