Device samsung i9070 (#123)

* Add Samsung Galaxy S Advance (i9070) device-specific package

* Add Samsung Galaxy S Advance (i9070) kernel package

* Add initfs-hook script to set framebuffer settings

* Enable adb root access in recovery mode (TWRP)

* Add usb configuration in initfs-hook script
Add weston calibration values
Update description of kernel changes

* Remove TMRP recovery and change init script to boot directly postmarketOS

device-samsung-i9070/90-android.rules

@@ -0,0 +1,8 @@
+# udev rules file
+# All device names can be read from weston's logfile (/tmp/weston.log in postmarketOS)
+
+# Touchscreen (use 'weston-calibrator' to calibrate)
+SUBSYSTEM=="input", ATTRS{name}=="sec_touchscreen", \
+ENV{ID_INPUT}="1", ENV{ID_INPUT_TOUCHSCREEN}="1" \
+ENV{WL_CALIBRATION}="1.043478 0.000000 -5.217407 0.014562 0.956938 2.798035"
+

device-samsung-i9070/APKBUILD

@@ -0,0 +1,30 @@
+pkgname=device-samsung-i9070
+pkgver=1
+pkgrel=3
+pkgdesc="Samsung Galaxy S Advance"
+url="https://github.com/postmarketOS"
+arch="noarch"
+license="MIT"
+depends="linux-samsung-i9070"
+makedepends=""
+install=""
+subpackages=""
+source="deviceinfo initfs-hook.sh 90-android.rules"
+options="!check"
+
+build() {
+	return 0
+}
+
+package() {
+	install -D -m644 "$srcdir/deviceinfo" \
+		"$pkgdir/etc/deviceinfo"
+    install -D -m644 "$srcdir"/initfs-hook.sh \
+        "$pkgdir"/etc/postmarketos-mkinitfs/hooks/00-${pkgname}.sh
+	install -D -m644 "$srcdir"/90-android.rules \
+		"$pkgdir"/etc/udev/rules.d/90-android.rules
+}
+
+sha512sums="8fc6b74f248e19b93278510892fd0eb594d8a86a23dcdef9cee1d8cafbe24a4d9567c69c0169268e924a48699f79459970d493876d542396d5de0ffc32d4d88f  deviceinfo
+098187f6ab56d2542f98f1b5fbcf493431f665a4300db05e859357366e39b02a3d508bfd94c1d1bd7c669261e7ef0d4e1aef1fdbb15541fe34f3f48a6caa247f  initfs-hook.sh
+ffa8ba47539f0b4a931c560811d7842c7f5270631066c270322859c1ef77e63fba09a8462c2533bd6d095056b2c7936c2d4fc4e225f3cff45169f121bf93d8ed  90-android.rules"

device-samsung-i9070/deviceinfo

@@ -0,0 +1,18 @@
+# This document format is a draft.
+# You can source it in shell scripts.
+# Use only double quotes.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Galaxy S Advance"
+deviceinfo_manufacturer="Samsung"
+deviceinfo_date=""
+deviceinfo_keyboard="false"
+deviceinfo_nonfree="????"
+deviceinfo_dtb=""
+deviceinfo_modules=""
+deviceinfo_modules_initfs=""
+deviceinfo_external_disk="true"
+deviceinfo_external_disk_install="true"
+deviceinfo_flash_methods="heimdall"
+deviceinfo_arch="armhf"
+

device-samsung-i9070/initfs-hook.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# set framebuffer resolution
+echo 16 > /sys/class/graphics/fb0/bits_per_pixel
+echo 960,1600 > /sys/class/graphics/fb0/virtual_size
+
+# set usb properties
+echo 0 > /sys/class/android_usb/android0/enable
+echo samsung > /sys/class/android_usb/android0/iManufacturer
+echo i9070 > /sys/class/android_usb/android0/iProduct
+echo 1 > /sys/class/android_usb/android0/enable
+
+# start the usb enumeration process from userspace
+echo 1 > /sys/devices/platform/ab8500-i2c.0/ab8500-usb.0/boot_time_device
+

linux-samsung-i9070/APKBUILD

@@ -0,0 +1,138 @@
+# Based on linux-lg-mako. Changes:
+# - add findutils makedepend (necessary for the initramfs)
+# - it builds an initramfs - do not use ramdisk.cpio and
+#	ramdisk-recovery.cpio, in there, always use the
+#	initramfs from the kernel2 partition ("isorec")
+# - directly boot to that initramfs, not only when the recovery
+#	key combination was pressed.
+# - use Alpine's busybox-static instead of the pre-compiled
+#	binary, that comes with the source
+# - reduce lzo compression because Alpine's busybox doesn't
+#	support high compression
+#
+# Kernel config changes, based on: arch/arm/configs/janice_defconfig
+# - enable devtmpfs (needed for udev -> touch support in weston)
+
+# This must be built in the target chroot, so busybox.static can
+# be used.
+_pmb_build_in_native_chroot="false"
+
+_vendor=samsung
+_flavor=samsung-i9070
+_hash="ac7219c4b8dcec7bc5a598d42c6be0db4aa36332"
+_config="config-${_flavor}.armhf"
+
+pkgname=linux-${_flavor}
+pkgver=3.0.101
+case $pkgver in
+	*.*.*)  _kernver=${pkgver%.*};;
+	*.*) _kernver=$pkgver;;
+esac
+pkgrel=1
+arch="armhf"
+pkgdesc="Samsung Galaxy S Advance kernel from Epirex"
+url="https://github.com/Epirex/Samsung_STE_Kernel"
+depends="postmarketos-mkinitfs"
+makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev
+findutils busybox-static"
+options="!strip !check !tracedeps"
+install=
+source="
+	$pkgname-$_hash.zip::https://github.com/Epirex/Samsung_STE_Kernel/archive/${_hash}.zip
+	$_config
+	compiler-gcc6.h
+	fix_return_address.patch
+	init
+"
+subpackages=""
+license="GPL2"
+
+_abi_release=${pkgver}
+_carch="arm"
+HOSTCC="${CC:-gcc}"
+HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
+
+ksrcdir="$srcdir/Samsung_STE_Kernel-${_hash}"
+
+prepare() {
+	local _patch_failed=
+	cd "$ksrcdir"
+
+	# first apply patches in specified order
+	for i in $source; do
+		case $i in
+		*.patch)
+			msg "Applying $i..."
+			if ! patch -s -p1 -N -i "$srcdir"/$i; then
+				echo $i >>failed
+				_patch_failed=1
+			fi
+			;;
+		esac
+	done
+
+	if ! [ -z "$_patch_failed" ]; then
+		error "The following patches failed:"
+		cat failed
+		return 1
+	fi
+
+	# Use Alpine's busybox.static instead of the pre-compiled busybox shipped
+	# with the source
+	cp -v /bin/busybox.static "$ksrcdir"/usr/u8500_initramfs_files/busybox
+
+	# do not use ramdisk.cpio and ramdisk-recovery.cpio, always use
+	# the initramfs from the kernel2 partition ("isorec"), so we can build
+	# it later and independently from the kernel. also directly boot that
+	# partition, not only when the recovery key combination was used.
+	cd "$ksrcdir"/usr/
+	mv u8500_initramfs.list u8500_initramfs.list_old
+	grep -v "../../ramdisk" u8500_initramfs.list_old > u8500_initramfs.list \
+		|| return 1
+	cp -v "$srcdir"/init "$ksrcdir"/usr/u8500_initramfs_files/init || return 1
+
+	# Reduce lzo compression because Alpine's busybox doesn't support high 
+	# compression
+	sed -i -e 's/lzop -9/lzop -6/g' "$ksrcdir"/scripts/Makefile.lib || return 1
+	sed -i -e 's/lzop -9/lzop -6/g' "$ksrcdir"/scripts/gen_initramfs_list.sh || return 1
+
+	# gcc6 support
+	cp -v "$srcdir/compiler-gcc6.h" "$ksrcdir/include/linux/" || return 1
+
+	mkdir -p "$srcdir"/build
+	cp "$srcdir"/$_config "$srcdir"/build/.config || return 1
+	make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
+		silentoldconfig
+}
+
+
+
+# this is so we can do: 'abuild menuconfig' to reconfigure kernel
+menuconfig() {
+	cd "$srcdir"/build || return 1
+	make ARCH="$_carch" menuconfig
+	cp .config "$startdir"/$_config
+}
+
+build() {
+	cd "$srcdir"/build
+	unset LDFLAGS
+
+	make ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
+		|| return 1
+}
+
+package() {
+	install -Dm644 "$srcdir/build/arch/arm/boot/zImage" \
+		"$pkgdir/boot/vmlinuz-$_flavor"
+
+	install -D "$srcdir/build/include/config/kernel.release" \
+		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
+}
+
+sha512sums="ea4e0f56efadd12c3dab18f15214973c708f777097aecac2fb7be4118472ba6e61e2660579eec7a2b57398c3a78107c965b59a108ddf1178d481a4e353a68077  linux-samsung-i9070-ac7219c4b8dcec7bc5a598d42c6be0db4aa36332.zip
+8789a6b50cb4f438aa581003a54419d70e36f7077bb0107aeaaa237bb2d603d9fc67a25e47460068547c1dcc296c64752b3b448629bd4b64645e619d314ab9bf  config-samsung-i9070.armhf
+d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
+ea1d3b5a234fa565e3c1a792de48f4fc4e6023d281d303c8e319c7ef28edc5739ab0e4dea0139a41f0a5c7d03e27921ccaa214fd0ac5c72245a094ce60128864  fix_return_address.patch
+ef01c51c138239a49c1d00ae0074a07fed267d64934cf3d436a8ff057b91692ee2d040a45eacbb0dc62d5017a708c4dca2fadc282c850fa72aeebcfa787e2cbc  init"

linux-samsung-i9070/compiler-gcc6.h

@@ -0,0 +1,69 @@
+// SOURCE:
+// https://github.com/NextThingCo/CHIP-u-boot/issues/10#issuecomment-287515505
+
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
+#endif
+
+#define __used				__attribute__((__used__))
+#define __must_check			__attribute__((warn_unused_result))
+#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
+
+/* Mark functions as cold. gcc will assume any path leading to a call
+   to them will be unlikely.  This means a lot of manual unlikely()s
+   are unnecessary now for any paths leading to the usual suspects
+   like BUG(), printk(), panic() etc. [but let's keep them for now for
+   older compilers]
+
+   Early snapshots of gcc 4.3 don't support this and we can't detect this
+   in the preprocessor, but we can live with this because they're unreleased.
+   Maketime probing would be overkill here.
+
+   gcc also has a __attribute__((__hot__)) to move hot functions into
+   a special section, but I don't see any sense in this right now in
+   the kernel context */
+#define __cold			__attribute__((__cold__))
+
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+#ifndef __CHECKER__
+# define __compiletime_warning(message) __attribute__((warning(message)))
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* __CHECKER__ */
+
+/*
+ * Mark a position in code as unreachable.  This can be used to
+ * suppress control flow warnings after asm blocks that transfer
+ * control elsewhere.
+ *
+ * Early snapshots of gcc 4.5 don't support this and we can't detect
+ * this in the preprocessor, but we can live with this because they're
+ * unreleased.  Really, we need to have autoconf for the kernel.
+ */
+#define unreachable() __builtin_unreachable()
+
+/* Mark a function definition as prohibited from being cloned. */
+#define __noclone	__attribute__((__noclone__))
+
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+
+/*
+ * GCC 'asm goto' miscompiles certain code sequences:
+ *
+ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
+ *
+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
+ *
+ * (asm goto is automatically volatile - the naming reflects this.)
+ */
+#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
+
+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
+#define __HAVE_BUILTIN_BSWAP32__
+#define __HAVE_BUILTIN_BSWAP64__
+#define __HAVE_BUILTIN_BSWAP16__
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+

linux-samsung-i9070/fix_return_address.patch

@@ -0,0 +1,49 @@
+From aeea3592a13bf12861943e44fc48f1f270941f8d Mon Sep 17 00:00:00 2001
+From: Behan Webster <behanw@converseincode.com>
+Date: Wed, 24 Sep 2014 01:06:46 +0100
+Subject: [PATCH] ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h
+
+With compilers which follow the C99 standard (like modern versions of gcc and
+clang), "extern inline" does the wrong thing (emits code for an externally
+linkable version of the inline function). In this case using static inline
+and removing the NULL version of return_address in return_address.c does
+the right thing.
+
+Signed-off-by: Behan Webster <behanw@converseincode.com>
+Reviewed-by: Mark Charlebois <charlebm@gmail.com>
+Acked-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ arch/arm/include/asm/ftrace.h    | 2 +-
+ arch/arm/kernel/return_address.c | 5 -----
+ 2 files changed, 1 insertion(+), 6 deletions(-)
+
+diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
+index 39eb16b0066f2..bfe2a2f5a644e 100644
+--- a/arch/arm/include/asm/ftrace.h
++++ b/arch/arm/include/asm/ftrace.h
+@@ -45,7 +45,7 @@ void *return_address(unsigned int);
+ 
+ #else
+ 
+-extern inline void *return_address(unsigned int level)
++static inline void *return_address(unsigned int level)
+ {
+ 	return NULL;
+ }
+diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
+index fafedd86885dd..f6aa84d5b93c9 100644
+--- a/arch/arm/kernel/return_address.c
++++ b/arch/arm/kernel/return_address.c
+@@ -63,11 +63,6 @@ void *return_address(unsigned int level)
+ #warning "TODO: return_address should use unwind tables"
+ #endif
+ 
+-void *return_address(unsigned int level)
+-{
+-	return NULL;
+-}
+-
+ #endif /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) / else */
+ 
+ EXPORT_SYMBOL_GPL(return_address);

linux-samsung-i9070/init

@@ -0,0 +1,29 @@
+#!/stage1/busybox sh
+
+# Samsung kernels come with their own initramfs, which extract and load another
+# initramfs. Usually that depends on the recovery key combination being pressed
+# or not. For simplicity, we always boot the recovery image (from the kernel2
+# partition) here.
+
+_PATH="$PATH"
+export PATH=/stage1
+
+busybox cd /
+busybox date >>boot.txt
+exec >>boot.txt 2>&1
+busybox rm init
+busybox mount -t proc proc /proc
+busybox mount -t sysfs sysfs /sys
+
+# always use the "isorec"-style lzop compressed initramfs
+# from the kernel2 partition
+load_image=/stage1/isorec.cpio
+busybox lzop -dc /dev/block/mmcblk0p17 > ${load_image}
+busybox cpio -i < ${load_image}
+
+busybox umount /sys
+busybox umount /proc
+busybox date >>boot.txt
+busybox rm -fr /stage1 /dev/*
+export PATH="${_PATH}"
+exec /init