Chromebook C201 (codename veyron_speedy) support

This introduces Libreboot support for the Asus Chromebook C201 (codename
veyron_speedy). At this point, this produces a standalone Libreboot image that
can be flashed to the RO Coreboot partition of the SPI flash, as well as the
Libreboot version that can be flash to the RO Firmware ID partition.

Libreboot on the Chromebook C201 uses the depthcharge bootloader, modified to
display text messages instead of ChromeOS bitmaps (that encourage the use of
ChromeOS).

For convenience, an installation script, chromebook-flash-replace, is provided
along with a description of the flash layout, to ease the replacement of the
Coreboot and RO Firmware ID partitions on the full SPI flash image.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

2 files changed, 98 insertions, 0 deletions

diff --git a/resources/libreboot/install/depthcharge/chromebook-flash-replace b/resources/libreboot/install/depthcharge/chromebook-flash-replace
new file mode 100755
index 0000000..4ad3fab
--- /dev/null
+++ b/resources/libreboot/install/depthcharge/chromebook-flash-replace
@@ -0,0 +1,96 @@
+#!/bin/bash
+
+#  replace the requested parts in the flash image with separate parts images
+#
+#	Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+[ "x${DEBUG+set}" = 'xset' ] && set -v
+
+regex="\([0-9a-fA-F]*\):\([0-9a-fA-F]*\)[[:space:]]*\(.*\)"
+block=256
+layout="layout.txt"
+flash=$1
+
+shift 1
+
+if [ ! -f "$flash" ]
+then
+	echo "Usage: $0 [flash image] [image] ..."
+	exit 1
+fi
+
+if [ ! -f "$layout" ]
+then
+	echo "Missing layout file: $layout"
+	exit 1
+fi
+
+flashsize=$( stat $flash -c "%s" )
+
+for image in $@; do
+	range=$( grep "$image" "$layout" )
+	name=$( echo "$range" | sed "s/$regex/\3/g" )
+	file="$name.img"
+
+	if [ -z "$range" ] || [ ! -f "$file" ]
+	then
+		echo "Invalid image name: $name"
+		continue
+	fi
+
+	start=$( echo "$range" | sed "s/$regex/\1/g" )
+	start=$( printf "%d\n" "0x$start" )
+	stop=$( echo "$range" | sed "s/$regex/\2/g" )
+	stop=$( printf "%d\n" "0x$stop" )
+
+	size=$(( $stop - $start + 1 ))
+	filesize=$( stat $file -c "%s" )
+
+	if [ $size -ne $filesize ]
+	then
+		echo "Invalid file size: expected $size, read $filesize"
+		continue
+	fi
+
+	if [ $size -gt $flashsize ]
+	then
+		echo "Image size too big for flash"
+		continue
+	fi
+
+	printf "Replacing $image in $flash\n\n"
+
+	if [ $start -gt 0 ]
+	then
+		dd if=$flash of=before.img bs=$block count=$(( $start / $block ))
+	else
+		touch before.img
+	fi
+
+	if [ $(( $stop + 1 )) -lt $flashsize ]
+	then
+		dd if=$flash of=after.img skip=$(( ($stop + 1) / $block )) bs=$block count=$(( ($flashsize - $stop - 1) / $block ))
+	else
+		touch after.img
+	fi
+
+	cat before.img $file after.img > $flash
+
+	rm before.img after.img
+
+	printf "\n"
+done
diff --git a/resources/libreboot/install/depthcharge/veyron_speedy/layout.txt b/resources/libreboot/install/depthcharge/veyron_speedy/layout.txt
new file mode 100644
index 0000000..bf397b8
--- /dev/null
+++ b/resources/libreboot/install/depthcharge/veyron_speedy/layout.txt
@@ -0,0 +1,2 @@
+00000000:000fffff coreboot
+001eff00:001effff ro-frid