Add respeaker driver install script

etc/install-respeaker-drivers.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+
+# Installs drivers for the ReSpeaker 2mic and 4mic HATs on Raspberry Pi OS.
+# Must be run with sudo.
+# Requires: curl raspberrypi-kernel-headers dkms i2c-tools libasound2-plugins alsa-utils
+
+set -eo pipefail
+
+apt-get update
+apt-get install --no-install-recommends --yes \
+    curl raspberrypi-kernel-headers dkms i2c-tools libasound2-plugins alsa-utils
+
+temp_dir="$(mktemp -d)"
+
+function finish {
+   rm -rf "${temp_dir}"
+}
+
+trap finish EXIT
+
+pushd "${temp_dir}"
+
+# Download source code to temporary directory
+# NOTE: There are different branches in the repo for different kernel versions.
+# We use v6.1 here.
+echo 'Downloading source code'
+curl -L -o - 'https://github.com/HinTak/seeed-voicecard/archive/refs/heads/v6.1.tar.gz' | \
+    tar -xzf -
+
+cd seeed-voicecard-6.1/
+
+# 1. Build kernel module
+echo 'Building kernel module'
+ver='0.3'
+mod='seeed-voicecard'
+src='./'
+kernel="$(uname -r)"
+marker='0.0.0'
+
+mkdir -p "/usr/src/${mod}-${ver}"
+cp -a "${src}"/* "/usr/src/${mod}-${ver}/"
+
+dkms add -m "${mod}" -v "${ver}"
+dkms build -k "${kernel}" -m "${mod}" -v "${ver}" && {
+    dkms install --force -k "${kernel}" -m "${mod}" -v "${ver}"
+}
+
+mkdir -p "/var/lib/dkms/${mod}/${ver}/${marker}"
+
+# 2. Install kernel module and configure
+echo 'Updating boot configuration'
+config='/boot/config.txt'
+
+cp seeed-*-voicecard.dtbo /boot/overlays
+grep -q "^snd-soc-ac108$" /etc/modules || echo "snd-soc-ac108" >> /etc/modules
+sed -i -e 's:#dtparam=i2c_arm=on:dtparam=i2c_arm=on:g' "${config}"
+echo "dtoverlay=i2s-mmap" >> "${config}"
+echo "dtparam=i2s=on" >> "${config}"
+mkdir -p /etc/voicecard
+cp *.conf *.state /etc/voicecard
+cp seeed-voicecard /usr/bin/
+cp seeed-voicecard.service /lib/systemd/system/
+systemctl enable --now seeed-voicecard.service
+
+echo 'Done. Please reboot the system.'
+popd