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, 114 insertions, 0 deletions

diff --git a/resources/scripts/helpers/download/coreboot b/resources/scripts/helpers/download/coreboot
index 2e1059b..e166fba 100755
--- a/resources/scripts/helpers/download/coreboot
+++ b/resources/scripts/helpers/download/coreboot
@@ -49,6 +49,39 @@ git reset --hard a2bed346a1a45c822bc255e90a0bf6a6ae1d1d50
 # vboot submodule is needed
 git submodule update --init --checkout -- 3rdparty/vboot/
 
+# there are modifications required
+cd "3rdparty/vboot/"
+
+git reset --hard 82db93d5fc924860e4f1fb4cf24f29b5b335a480
+
+# Patch vboot
+# ------------------------------------------------------------------------------
+
+printf "firmware: Developer mode timeout delay shortening (down to 3 seconds)\n"
+git am "../../../resources/libreboot/patch/vboot/0001-firmware-Developer-mode-timeout-delay-shortening-dow.patch"
+
+printf "firmware: Text-based screen display in priority\n"
+git am "../../../resources/libreboot/patch/vboot/0002-firmware-Text-based-screen-display-in-priority.patch"
+
+printf "firmware: NV context pointer handoff to VbExDisplayScreen\n"
+git am "../../../resources/libreboot/patch/vboot/0003-firmware-NV-context-pointer-handoff-to-VbExDisplaySc.patch"
+
+printf "firmware: Hold key combination in developer mode\n"
+git am "../../../resources/libreboot/patch/vboot/0004-firmware-Hold-key-combination-in-developer-mode.patch"
+
+printf "firmware: Screen blank and wait at disabled USB boot warning\n"
+git am "../../../resources/libreboot/patch/vboot/0005-firmware-Screen-blank-and-wait-at-disabled-USB-boot-.patch"
+
+printf "firmware: Separate screen and wait at device information screen\n"
+git am "../../../resources/libreboot/patch/vboot/0006-firmware-Separate-screen-and-wait-at-device-informat.patch"
+
+printf "firmware: Localization keys removal\n"
+git am "../../../resources/libreboot/patch/vboot/0007-firmware-Localization-keys-removal.patch"
+
+# leave the vboot tree
+cd "../../"
+
+
 # Get patches from review.coreboot.org
 # ------------------------------------------------------------------------------
 
@@ -139,6 +172,15 @@ printf "ec/lenovo/h8: re-factor handling of power_management_beeps\n"
 # git fetch http://review.coreboot.org/coreboot refs/changes/31/10531/8 && git cherry-pick FETCH_HEAD
 git am "../resources/libreboot/patch/0013-ec-lenovo-h8-re-factor-handling-of-power_management_.patch"
 
+# Chromebook:
+
+printf "armv7: Word-sized/half-word-sized memory operations for 32/16 bit read/write\n"
+# git fetch http://review.coreboot.org/coreboot refs/changes/98/11698/6 && git cherry-pick FETCH_HEAD
+git am "../resources/libreboot/patch/chromebook/0001-armv7-Word-sized-half-word-sized-memory-operations-f.patch"
+
+printf "chromeos: Allow disabling vboot firmware verification when ChromeOS is enabled\n"
+git am "../resources/libreboot/patch/chromebook/0002-chromeos-Allow-disabling-vboot-firmware-verification.patch"
+
 # Run coreboot-libre deblob scripts
 # ------------------------------------------------------------------------------
 
diff --git a/resources/scripts/helpers/download/depthcharge b/resources/scripts/helpers/download/depthcharge
new file mode 100755
index 0000000..1d1e769
--- /dev/null
+++ b/resources/scripts/helpers/download/depthcharge
@@ -0,0 +1,72 @@
+#!/bin/bash
+
+#  helper script: downloads depthcharge and patches it
+#
+#	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/>.
+#
+
+# This script assumes that the working directory is the
+# root of libreboot_src or libreboot git.
+
+[ "x${DEBUG+set}" = 'xset' ] && set -v
+set -u -e
+
+# Get depthcharge and patch it
+
+printf "Downloading depthcharge\n"
+
+rm -Rf "depthcharge/"
+
+# Get depthcharge
+# ------------------------------------------------------------------------------
+
+# download depthcharge from git
+git clone https://chromium.googlesource.com/chromiumos/platform/depthcharge
+
+# enter the tree to patch it
+cd "depthcharge/"
+
+# reset to the latest previously tested revision
+git reset --hard 3a5d54e31267578f48fb283fae56a405108f1498
+
+# Patch depthcharge
+# ------------------------------------------------------------------------------
+
+printf "arm: armv7-a march abi flag for ARMv7 hardware\n"
+git am "../resources/depthcharge/patch/0001-arm-armv7-a-march-abi-flag-for-ARMv7-hardware.patch"
+
+printf "Coreboot image integration removal\n"
+git am "../resources/depthcharge/patch/0002-Coreboot-image-integration-removal.patch"
+
+printf "DOTCONFIG location correction\n"
+git am "../resources/depthcharge/patch/0003-DOTCONFIG-location-correction.patch"
+
+printf "Adaptation for a read-only boot path when no vboot handoff data is found\n"
+git am "../resources/depthcharge/patch/0004-Adaptation-for-a-read-only-boot-path-when-no-vboot-h.patch"
+
+printf "Proper firmware index report for read-only boot path\n"
+git am "../resources/depthcharge/patch/0005-Proper-firmware-index-report-for-read-only-boot-path.patch"
+
+printf "fdt: nonvolatile-context-storage report to mkbp for EC NV storage\n"
+git am "../resources/depthcharge/patch/0006-fdt-nonvolatile-context-storage-report-to-mkbp-for-E.patch"
+
+printf "vboot: Display callbacks for developer and recovery mode screens\n"
+git am "../resources/depthcharge/patch/0007-vboot-Display-callbacks-for-developer-and-recovery-m.patch"
+
+# leave the tree
+cd "../"
+
+printf "\n\n"