==========================
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ALPS HID Touchpad Protocol
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==========================
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Introduction
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------------
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Currently ALPS HID driver supports U1 Touchpad device.
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U1 device basic information.
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========== ======
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Vender ID 0x044E
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Product ID 0x120B
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Version ID 0x0121
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========== ======
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HID Descriptor
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--------------
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======= ==================== ===== =======================================
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Byte Field Value Notes
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======= ==================== ===== =======================================
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0 wHIDDescLength 001E Length of HID Descriptor : 30 bytes
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2 bcdVersion 0100 Compliant with Version 1.00
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4 wReportDescLength 00B2 Report Descriptor is 178 Bytes (0x00B2)
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6 wReportDescRegister 0002 Identifier to read Report Descriptor
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8 wInputRegister 0003 Identifier to read Input Report
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10 wMaxInputLength 0053 Input Report is 80 Bytes + 2
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12 wOutputRegister 0000 Identifier to read Output Report
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14 wMaxOutputLength 0000 No Output Reports
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16 wCommandRegister 0005 Identifier for Command Register
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18 wDataRegister 0006 Identifier for Data Register
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20 wVendorID 044E Vendor ID 0x044E
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22 wProductID 120B Product ID 0x120B
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24 wVersionID 0121 Version 01.21
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26 RESERVED 0000 RESERVED
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======= ==================== ===== =======================================
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Report ID
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---------
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========== ================= =========================================
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ReportID-1 (Input Reports) (HIDUsage-Mouse) for TP&SP
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ReportID-2 (Input Reports) (HIDUsage-keyboard) for TP
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ReportID-3 (Input Reports) (Vendor Usage: Max 10 finger data) for TP
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ReportID-4 (Input Reports) (Vendor Usage: ON bit data) for GP
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ReportID-5 (Feature Reports) Feature Reports
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ReportID-6 (Input Reports) (Vendor Usage: StickPointer data) for SP
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ReportID-7 (Feature Reports) Flash update (Bootloader)
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========== ================= =========================================
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Data pattern
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------------
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===== ========== ===== =================
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Case1 ReportID_1 TP/SP Relative/Relative
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Case2 ReportID_3 TP Absolute
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ReportID_6 SP Absolute
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===== ========== ===== =================
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Command Read/Write
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------------------
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To read/write to RAM, need to send a commands to the device.
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The command format is as below.
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DataByte(SET_REPORT)
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===== ======================
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Byte1 Command Byte
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Byte2 Address - Byte 0 (LSB)
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Byte3 Address - Byte 1
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Byte4 Address - Byte 2
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Byte5 Address - Byte 3 (MSB)
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Byte6 Value Byte
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Byte7 Checksum
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===== ======================
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Command Byte is read=0xD1/write=0xD2 .
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Address is read/write RAM address.
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Value Byte is writing data when you send the write commands.
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When you read RAM, there is no meaning.
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DataByte(GET_REPORT)
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===== ======================
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Byte1 Response Byte
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Byte2 Address - Byte 0 (LSB)
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Byte3 Address - Byte 1
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Byte4 Address - Byte 2
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Byte5 Address - Byte 3 (MSB)
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Byte6 Value Byte
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Byte7 Checksum
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===== ======================
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Read value is stored in Value Byte.
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Packet Format
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Touchpad data byte
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------------------
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======= ======= ======= ======= ======= ======= ======= ======= =====
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- b7 b6 b5 b4 b3 b2 b1 b0
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======= ======= ======= ======= ======= ======= ======= ======= =====
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1 0 0 SW6 SW5 SW4 SW3 SW2 SW1
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2 0 0 0 Fcv Fn3 Fn2 Fn1 Fn0
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3 Xa0_7 Xa0_6 Xa0_5 Xa0_4 Xa0_3 Xa0_2 Xa0_1 Xa0_0
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4 Xa0_15 Xa0_14 Xa0_13 Xa0_12 Xa0_11 Xa0_10 Xa0_9 Xa0_8
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5 Ya0_7 Ya0_6 Ya0_5 Ya0_4 Ya0_3 Ya0_2 Ya0_1 Ya0_0
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6 Ya0_15 Ya0_14 Ya0_13 Ya0_12 Ya0_11 Ya0_10 Ya0_9 Ya0_8
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7 LFB0 Zs0_6 Zs0_5 Zs0_4 Zs0_3 Zs0_2 Zs0_1 Zs0_0
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8 Xa1_7 Xa1_6 Xa1_5 Xa1_4 Xa1_3 Xa1_2 Xa1_1 Xa1_0
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9 Xa1_15 Xa1_14 Xa1_13 Xa1_12 Xa1_11 Xa1_10 Xa1_9 Xa1_8
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10 Ya1_7 Ya1_6 Ya1_5 Ya1_4 Ya1_3 Ya1_2 Ya1_1 Ya1_0
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11 Ya1_15 Ya1_14 Ya1_13 Ya1_12 Ya1_11 Ya1_10 Ya1_9 Ya1_8
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12 LFB1 Zs1_6 Zs1_5 Zs1_4 Zs1_3 Zs1_2 Zs1_1 Zs1_0
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13 Xa2_7 Xa2_6 Xa2_5 Xa2_4 Xa2_3 Xa2_2 Xa2_1 Xa2_0
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14 Xa2_15 Xa2_14 Xa2_13 Xa2_12 Xa2_11 Xa2_10 Xa2_9 Xa2_8
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15 Ya2_7 Ya2_6 Ya2_5 Ya2_4 Ya2_3 Ya2_2 Ya2_1 Ya2_0
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16 Ya2_15 Ya2_14 Ya2_13 Ya2_12 Ya2_11 Ya2_10 Ya2_9 Ya2_8
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17 LFB2 Zs2_6 Zs2_5 Zs2_4 Zs2_3 Zs2_2 Zs2_1 Zs2_0
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18 Xa3_7 Xa3_6 Xa3_5 Xa3_4 Xa3_3 Xa3_2 Xa3_1 Xa3_0
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19 Xa3_15 Xa3_14 Xa3_13 Xa3_12 Xa3_11 Xa3_10 Xa3_9 Xa3_8
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20 Ya3_7 Ya3_6 Ya3_5 Ya3_4 Ya3_3 Ya3_2 Ya3_1 Ya3_0
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21 Ya3_15 Ya3_14 Ya3_13 Ya3_12 Ya3_11 Ya3_10 Ya3_9 Ya3_8
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22 LFB3 Zs3_6 Zs3_5 Zs3_4 Zs3_3 Zs3_2 Zs3_1 Zs3_0
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23 Xa4_7 Xa4_6 Xa4_5 Xa4_4 Xa4_3 Xa4_2 Xa4_1 Xa4_0
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24 Xa4_15 Xa4_14 Xa4_13 Xa4_12 Xa4_11 Xa4_10 Xa4_9 Xa4_8
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25 Ya4_7 Ya4_6 Ya4_5 Ya4_4 Ya4_3 Ya4_2 Ya4_1 Ya4_0
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26 Ya4_15 Ya4_14 Ya4_13 Ya4_12 Ya4_11 Ya4_10 Ya4_9 Ya4_8
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27 LFB4 Zs4_6 Zs4_5 Zs4_4 Zs4_3 Zs4_2 Zs4_1 Zs4_0
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======= ======= ======= ======= ======= ======= ======= ======= =====
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SW1-SW6:
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SW ON/OFF status
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Xan_15-0(16bit):
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X Absolute data of the "n"th finger
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Yan_15-0(16bit):
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Y Absolute data of the "n"th finger
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Zsn_6-0(7bit):
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Operation area of the "n"th finger
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StickPointer data byte
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----------------------
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======= ======= ======= ======= ======= ======= ======= ======= =====
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- b7 b6 b5 b4 b3 b2 b1 b0
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======= ======= ======= ======= ======= ======= ======= ======= =====
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Byte1 1 1 1 0 1 SW3 SW2 SW1
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Byte2 X7 X6 X5 X4 X3 X2 X1 X0
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Byte3 X15 X14 X13 X12 X11 X10 X9 X8
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Byte4 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
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Byte5 Y15 Y14 Y13 Y12 Y11 Y10 Y9 Y8
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Byte6 Z7 Z6 Z5 Z4 Z3 Z2 Z1 Z0
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Byte7 T&P Z14 Z13 Z12 Z11 Z10 Z9 Z8
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======= ======= ======= ======= ======= ======= ======= ======= =====
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SW1-SW3:
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SW ON/OFF status
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Xn_15-0(16bit):
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X Absolute data
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Yn_15-0(16bit):
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Y Absolute data
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Zn_14-0(15bit):
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Z
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