16472c5b2c
A recent(?) update in shellcheck made this fail, possibly because the
test in shellcheck was fixed(?) or ???
The failure this fixes is:
Test with shellcheck: ./main/msm-firmware-loader/msm-firmware-loader.sh
In msm-firmware-loader.sh line 49:
if [ -z "${FW_PARTITIONS##*$PARTNAME*}" ] && [ -n "$PARTNAME" ]
^-------^ SC2295 (info): Expansions inside ${..} need to be quoted separately, otherwise they match as patterns.
[ci:skip-build] already built successfully in CI
131 lines
3.9 KiB
Bash
131 lines
3.9 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: MIT
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#
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# This script is responsible for loading firmware blobs from firmware
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# partitions on qcom devices. It will make a dir in tmp, mount all of the
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# interesting partitions there and then symlink blobs to a single dir that can
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# be then provided to the kernel. (At this time only single additional
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# directory can be provided)
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#
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# This script attempts to load everything at runtime and be as generic
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# as possible between the target devices: It should allow a single rootfs
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# to be used on multiple different devices as long as all the blobs
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# are present on dedicated partitions.
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# (Usually the case, Samsung devices ship all blobs, other devices may miss
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# venus but that still allows for WiFi and modem to work)
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#
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# Configurations:
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# List of partitions to be mounted and inspected for blobs.
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FW_PARTITIONS="
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apnhlos
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modem
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"
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# Base dirrectory to be used to unfold the partitions into.
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BASEDIR="/lib/firmware/msm-firmware-loader"
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# Preparations:
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# This script is intended to run before udev. This means that writeable fs
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# May not be available yet. Since this script only creates symlinks, it
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# uses tmpfs to work around the early-run limitations as well as to reduce
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# disk wear slightly.
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mount -o mode=755,nodev,noexec,nosuid -t tmpfs none "$BASEDIR"
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mkdir "$BASEDIR/mnt"
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mkdir "$BASEDIR/target"
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# Scanning and mounting partitions we're interested in:
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# /dev/disk/by-partlabel symlinks don't exist yet, scan sysfs for names instead
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for part in /sys/block/mmcblk*/mmcblk*p*
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do
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DEVNAME="$(grep DEVNAME "$part"/uevent | sed 's/DEVNAME=//g')"
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PARTNAME="$(grep PARTNAME "$part"/uevent | sed 's/PARTNAME=//g')"
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if [ -z "${FW_PARTITIONS##*"$PARTNAME"*}" ] && [ -n "$PARTNAME" ]
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then
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mkdir "$BASEDIR/mnt/$PARTNAME"
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mount -o ro,nodev,noexec,nosuid \
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"/dev/$DEVNAME" "$BASEDIR/mnt/$PARTNAME"
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fi
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done
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# Linking blobs from all partitions:
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# Backup the preselected path, link all of the installed blobs.
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# This is needed for devices that require blobs either not present
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# on the partitions (e.g. venus on many msm8916 devices) or if
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# the device has secure-boot disabled and can run newer blobs.
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EXTRA_PATH="$(cat /sys/module/firmware_class/parameters/path)"
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if [ -d "$EXTRA_PATH" ]
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then
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for blob in "$EXTRA_PATH"/*
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do
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if ! [ -e "$blob" ]; then break; fi
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ln -s "$blob" "$BASEDIR/target/$(basename "$blob")"
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done
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fi
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# Scan through mounted partitions and symlink all of the blobs.
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# This loop ignores blobs with names already present in the
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# target to allow preinstalled blobs to override ones in the partitions.
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for blob in "$BASEDIR"/mnt/*/image/*
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do
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BLOBBASE="${blob##*/}"
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BLOBBASE="${BLOBBASE%.*}"
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# Skip blob prefix if it's already present.
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for prefix in "$BASEDIR/target/$BLOBBASE."*
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do
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if [ -e "$prefix" ]; then continue 2; fi
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done
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for part in "$BASEDIR"/mnt/*/image/"$BLOBBASE"*
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do
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ln -s "$part" "$BASEDIR/target/$(basename "$part")"
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done
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done
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# Fixup the directory structure:
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# venus (video encoder/decoder) blobs are expected to be in a subdir.
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# Re-link the blobs if the venus firmware wasn't already preinstalled.
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# Different platforms expect firmware in different subdirs
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# (as in linux-firmware-qcom) so the venus dir is duplicated multiple times
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# under possible names for the scritpt to be generic without complex detection.
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if [ -f "$BASEDIR/target/venus.mdt" ] && ! [ -d "$BASEDIR/target/qcom" ]
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then
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mkdir -p "$BASEDIR/target/qcom/venus-x"
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for part in "$BASEDIR"/target/venus.*
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do
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ln -s "$part" "$BASEDIR/target/qcom/venus-x/$(basename "$part")"
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done
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fi
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VENUS_DIRS="
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venus-1.8
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venus-4.2
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venus-5.2
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venus-5.4
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vpu-1.0
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vpu-2.0
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"
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for vdir in $VENUS_DIRS
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do
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if ! [ -d "$BASEDIR/target/qcom/$vdir" ] && [ -f "$BASEDIR/target/venus.mdt" ]
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then
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ln -s "$BASEDIR/target/qcom/venus-x" \
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"$BASEDIR/target/qcom/$vdir"
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fi
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done
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# Set the new custom firmware path:
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printf "%s" "$BASEDIR/target" > /sys/module/firmware_class/parameters/path
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