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