Initial commit

meta-quanta/meta-gbs/recipes-gbs/gbs-bios-update/files/bios-update.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+# Copyright 2020 Google LLC
+# Copyright 2020 Quanta Computer Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Global variables
+
+# GPIO to control the host SPI mux
+SPI_SW_SELECT=169
+
+# Kernel control string for bind/unbind
+KERNEL_FIU_ID="c0000000.spi"
+
+# Kernel sysfs path for bind/unbind
+KERNEL_SYSFS_FIU="/sys/bus/platform/drivers/NPCM-FIU"
+
+# the node of FIU is spi for kernel 5.10, but
+# for less than or equal kernel 5.4, the node
+# is fiu
+if ls "$KERNEL_SYSFS_FIU"/*.fiu 1> /dev/null 2>&1; then
+  KERNEL_FIU_ID="c0000000.fiu"
+fi
+
+IMAGE_FILE="/tmp/image-bios"
+
+# Taken from /run/initramfs/update
+# Given label name, return mtd node. e.g. `findmtd bmc` returns 'mtd0'
+findmtd() {
+    m=$(grep -xl "$1" /sys/class/mtd/*/name)
+    m=${m%/name}
+    m=${m##*/}
+    echo "$m"
+}
+
+cleanup() {
+    if [ -d "${KERNEL_SYSFS_FIU}/${KERNEL_FIU_ID}" ]; then
+        echo "${KERNEL_FIU_ID}" > "${KERNEL_SYSFS_FIU}"/unbind
+    fi
+    echo low > /sys/class/gpio/gpio${SPI_SW_SELECT}/direction  # Switch mux to host
+    rm -f ${IMAGE_FILE}
+}
+trap cleanup EXIT SIGHUP SIGINT SIGTERM
+
+main() {
+    if [ ! -f ${IMAGE_FILE} ]; then
+        echo "Invalid bios image file!"
+        exit 1
+    fi
+
+    echo "Starting bios update..."
+    if [ ! -d "/sys/class/gpio/gpio${SPI_SW_SELECT}" ]; then
+        echo "${SPI_SW_SELECT}" > /sys/class/gpio/export
+    fi
+
+    echo high > /sys/class/gpio/gpio${SPI_SW_SELECT}/direction  # Switch mux to BMC
+
+    if [ -d "${KERNEL_SYSFS_FIU}/${KERNEL_FIU_ID}" ]; then
+        echo "${KERNEL_FIU_ID}" > "${KERNEL_SYSFS_FIU}"/unbind
+    fi
+    echo "${KERNEL_FIU_ID}" > "${KERNEL_SYSFS_FIU}"/bind
+
+    # BIOS flash is labelled 'bios-primary'
+    bios_mtd=$(findmtd bios-primary)
+    if [ -z "${bios_mtd}" ]; then
+        echo "Cannot find bios flash mtd partition!"
+        exit 1
+    fi
+
+    if flashcp -v $IMAGE_FILE /dev/"${bios_mtd}" ; then
+        echo "bios update successfully..."
+    else
+        echo "bios update failed..."
+        exit 1
+    fi
+}
+# Exit without running main() if sourced
+if ! (return 0 2>/dev/null); then
+    main "$@"
+fi