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#!/bin/sh
#
# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# This script provides tools to read or change GBB flags on a live system.
SCRIPT_BASE="$(dirname "$0")"
. "${SCRIPT_BASE}/common_minimal.sh"
load_shflags || exit 1
# Globals
# ----------------------------------------------------------------------------
# Values from vboot_reference/firmware/2lib/include/2gbb_flags.h
GBBFLAGS_DESCRIPTION_PREFIX="
Defined flags (some values may be not supported by all systems):
"
GBBFLAGS_LIST="
VB2_GBB_FLAG_DEV_SCREEN_SHORT_DELAY 0x00000001
VB2_GBB_FLAG_LOAD_OPTION_ROMS 0x00000002
VB2_GBB_FLAG_ENABLE_ALTERNATE_OS 0x00000004
VB2_GBB_FLAG_FORCE_DEV_SWITCH_ON 0x00000008
VB2_GBB_FLAG_FORCE_DEV_BOOT_USB 0x00000010
VB2_GBB_FLAG_DISABLE_FW_ROLLBACK_CHECK 0x00000020
VB2_GBB_FLAG_ENTER_TRIGGERS_TONORM 0x00000040
VB2_GBB_FLAG_FORCE_DEV_BOOT_ALTFW 0x00000080
VB2_GBB_FLAG_RUNNING_FAFT 0x00000100
VB2_GBB_FLAG_DISABLE_EC_SOFTWARE_SYNC 0x00000200
VB2_GBB_FLAG_DEFAULT_DEV_BOOT_ALTFW 0x00000400
VB2_GBB_FLAG_DISABLE_AUXFW_SOFTWARE_SYNC 0x00000800
VB2_GBB_FLAG_DISABLE_LID_SHUTDOWN 0x00001000
VB2_GBB_FLAG_FORCE_MANUAL_RECOVERY 0x00004000
VB2_GBB_FLAG_DISABLE_FWMP 0x00008000
VB2_GBB_FLAG_ENABLE_UDC 0x00010000
"
GBBFLAGS_DESCRIPTION_SUFFIX="
To get a developer-friendly device, try 0x11 (short_delay + boot_usb).
For factory-related tests (always DEV), try 0x39.
For early development (disable EC/auxfw software sync), try 0xa39.
"
GBBFLAGS_DESCRIPTION="${GBBFLAGS_DESCRIPTION_PREFIX}${GBBFLAGS_LIST}"
GBBFLAGS_DESCRIPTION="${GBBFLAGS_DESCRIPTION}${GBBFLAGS_DESCRIPTION_SUFFIX}"
FLAGS_HELP="Manages Chrome OS Firmware GBB Flags value.
Usage: $0 [option_flags] GBB_FLAGS_VALUE
${GBBFLAGS_DESCRIPTION}"
flashrom_read() {
local file="$1"
local programmer="$2"
flashrom -p "${programmer}" -i GBB -i FMAP -r "${file}"
}
flashrom_write() {
local file="$1"
local programmer="$2"
flashrom -p "${programmer}" -i GBB --noverify-all -w "${file}"
}
get_programmer_for_servo() {
local servo_type
local serial
local programmer
servo_type=$(dut-control -o servo_type 2>/dev/null) || \
die "Failed to get servo information. Is servod running?"
case "${servo_type}" in
*with_servo_micro*)
serial=$(dut-control -o servo_micro_serialname 2>/dev/null)
;;
*with_c2d2*)
serial=$(dut-control -o c2d2_serialname 2>/dev/null)
;;
*with_ccd*)
serial=$(dut-control -o ccd_serialname 2>/dev/null)
;;
*)
serial=$(dut-control -o serialname 2>/dev/null)
;;
esac
case "${servo_type}" in
*servo_micro*|*c2d2*)
# TODO(sammc): Support servo micro, servo v2 and C2D2. This requires
# toggling cpu_fw_spi via dut-control before and after running flashrom.
# C2D2 additionally requires a working cpu_fw_spi implementation.
die "Unsupported servo type ${servo_type}"
;;
*ccd_cr50*|*ccd_gsc*)
programmer="raiden_debug_spi:target=AP,serial=${serial}"
;;
*)
die "Unsupported servo type ${servo_type}"
;;
esac
echo "${programmer}"
}
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