kobo-epdc-extractor: extractor for hidden waveform partitions (MR 3099)

Extracts waveform into a file. Waveform seems to be specific to a
display batch.

device/testing/kobo-epdc-extractor/APKBUILD

@@ -0,0 +1,43 @@
+# Maintainer: Andreas Kemnade <andreas@kemnade.info>
+pkgname=kobo-epdc-extractor
+pkgver=1.0
+pkgdesc="Extractor for waveform on the kobo devices"
+arch="armv7"
+license="MIT"
+url="https://postmarketos.org"
+pkgrel=0
+install="$pkgname.post-install"
+source="
+	kobo-firmware-extractor-1.0.tar.gz::https://github.com/akemnade/kobo-firmware-extractor/archive/refs/tags/1.0.tar.gz
+	start-epd.sh
+	kobo-epdc-extractor.files
+	extract-waveform.initd
+	"
+builddir="$srcdir"/kobo-firmware-extractor-1.0
+
+build() {
+	make
+}
+
+package() {
+	make DESTDIR="$pkgdir" install
+	touch kobo-epdc-extractor
+	# we need it in case we want to do use a graphical display unlock
+	install -Dm644 kobo-epdc-extractor -t \
+		"$pkgdir"/usr/share/postmarketos-mkinitfs-triggers
+
+	mkdir -p "$pkgdir"/etc/postmarketos-mkinitfs/hooks/
+	install -Dm644 "$srcdir"/start-epd.sh \
+		"$pkgdir"/etc/postmarketos-mkinitfs/hooks/80-start-epd.sh
+
+	install -Dm644 "$srcdir"/kobo-epdc-extractor.files \
+		"$pkgdir"/etc/postmarketos-mkinitfs/files/01-kobo-epdc-extractor.files
+	install -Dm755 "$srcdir"/extract-waveform.initd "$pkgdir"/etc/init.d/extract-waveform
+}
+
+sha512sums="
+2e44387b1275902f296ce77efd18b4759487891b28cb6b88477f44cd21ac6bc81b23c8d3016f81fe926bf87750b588d621fc1c36ca477dce42d3150f0b010953  kobo-firmware-extractor-1.0.tar.gz
+d008a75fb6ae229e1257af517e741717611cb2bc9cd11ab736f9e066493986cf4a6199854deaf90a1e8c91cbc02e7f79b2cf67ccd92ba110290d4af0b5c5f8ef  start-epd.sh
+c71bf714bd05f9c4c2724fc855b90f5a7fa4c1014ff41f16a07a91e791ada67fede5b92536e22ef3634724a881492fa4151b1fb8060561e1bea2a2f960ba794e  kobo-epdc-extractor.files
+13712f9aa84ba06e27f38488f5062565dad06a4edd207daabc7450b57a62779216ea49c9987bb7b2a02e69d01ae354e8ca7c42ec2d19ee24f177cff5a36569a5  extract-waveform.initd
+"

device/testing/kobo-epdc-extractor/extract-waveform.initd

@@ -0,0 +1,19 @@
+#!/sbin/openrc-run
+
+description="Extract EPD waveform blob to /lib/firmware"
+
+depend() {
+	after root
+}
+
+start()
+{
+	# Only run once
+	rm -f /etc/runlevels/*/$RC_SVCNAME
+
+	extract-waveform.sh &&
+	ls /lib/firmware/imx/epdc/* >>/etc/postmarketos-mkinitfs/files/01-kobo-epdc-extractor.files &&
+	mkinitfs
+	eend $?
+}
+

device/testing/kobo-epdc-extractor/kobo-epdc-extractor.files

@@ -0,0 +1,2 @@
+/bin/extract-kobohidden
+/bin/extract-waveform.sh

device/testing/kobo-epdc-extractor/kobo-epdc-extractor.post-install

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rc-update add extract-waveform default

device/testing/kobo-epdc-extractor/start-epd.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+extract-waveform.sh
+cd /sys/bus/platform/devices
+echo *epdc >/sys/bus/platform/drivers/mxc_epdc/bind