2025-06-01 21:28:09 -05:00
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#!/usr/bin/env bash
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# Proven Pi-5 configfs gadget: HID keyboard+mouse + stereo UAC2
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set -euo pipefail
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2025-06-02 20:18:19 -05:00
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modprobe libcomposite
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2025-06-06 00:04:55 -05:00
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# mountpoint -q /sys/kernel/config || mount -t configfs configfs /sys/kernel/config
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2025-06-01 21:28:09 -05:00
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G=/sys/kernel/config/usb_gadget/navka
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2025-06-02 20:18:19 -05:00
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if [[ -d $G ]]; then
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echo "" >"$G/UDC" || true
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find "$G/configs" -type l -delete || true
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rmdir "$G/functions/"* 2>/dev/null || true
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rmdir "$G" 2>/dev/null || true
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fi
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2025-06-01 21:28:09 -05:00
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mkdir -p "$G"
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echo 0x1d6b >"$G/idVendor" # Linux Foundation
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echo 0x0104 >"$G/idProduct" # Multifunction Composite Gadget
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echo 0x0200 >"$G/bcdUSB"
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mkdir -p "$G/strings/0x409"
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echo "0001" >"$G/strings/0x409/serialnumber"
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echo "Navka" >"$G/strings/0x409/manufacturer"
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echo "Navka Composite" >"$G/strings/0x409/product"
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# HID (boot keyboard)
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mkdir -p "$G/functions/hid.usb0"
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echo 1 >"$G/functions/hid.usb0/protocol"
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echo 1 >"$G/functions/hid.usb0/subclass"
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echo 8 >"$G/functions/hid.usb0/report_length"
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echo -ne '\x05\x01\x09\x06\xa1\x01\x05\x07\x19\xe0\x29\xe7\x15\x00\x25'\
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'\x01\x75\x01\x95\x08\x81\x02\x95\x01\x75\x08\x81\x01\x95\x05\x75\x01'\
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'\x05\x08\x19\x01\x29\x05\x91\x02\x95\x01\x75\x03\x91\x01\x95\x06\x75'\
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'\x08\x15\x00\x25\x65\x05\x07\x19\x00\x29\x65\x81\x00\xc0' \
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>"$G/functions/hid.usb0/report_desc"
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# UAC2 stereo 48 kHz
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mkdir -p "$G/functions/uac2.usb0"
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echo 48000 >"$G/functions/uac2.usb0/c_srate"
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echo 2 >"$G/functions/uac2.usb0/c_ssize"
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echo 2 >"$G/functions/uac2.usb0/p_chmask"
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mkdir -p "$G/configs/c.1/strings/0x409"
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echo "Config 1" >"$G/configs/c.1/strings/0x409/configuration"
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echo 500 >"$G/configs/c.1/MaxPower"
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ln -s "$G/functions/hid.usb0" "$G/configs/c.1/"
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ln -s "$G/functions/uac2.usb0" "$G/configs/c.1/"
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echo "$(ls /sys/class/udc | head -n1)" >"$G/UDC"
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