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https://git.openwrt.org/openwrt/openwrt.git
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ef2785a2d0
The SmartFiber XP8421-B is a fiber modem which is available for $20 online and has 512MB of memory, 256MB of SPI NAND flash and 2 USB 2.0 ports in addition to ethernet, wifi and XPON. Because EcoNet is not currently producing evaluation boards, the XP8421-B stands in as a convenient, low cost, off-the-shelf, representitive example of the capabilities of the EN751221 econet processor. This is also the example board that is included in the upstream Linux patchset. The XP8421-B, and apparently many other devices of this platform, use a dual-image layout. I have chosen to reuse this to support dual-boot between OpenWRT and the factory firmware. Certain design decisions were made with the goal of not overwriting data that is used by the factory OS. This commit also introduces a utility for switching between OS_A and OS_B which are used for OpenWRT and Factory OS respectively. Flashing instructions (from bootloader): Build and then locate the squashfs-tclinux.trx image file Get the length of that file in hex: printf '%X\n' "$(stat -c%s the-file-squashfs-tclinux.trx)" Connect to device with xmodem capability, e.g. picocom --send-cmd lsx -vv -b 115200 /dev/ttyUSB0 Switch device on and press a key within 3 seconds Enter bootloader username and password: telecomadmin nE7jA%5m Type: xmdm 80020000 <file length hex> Quickly start xmodem and send the file, in picocom that is ctrl+a ctrl+s <paste-the-file-name> enter If the transfer fails to start, wait 30 seconds to a minute for the bootloader prompt to return and then try the command again. Once the transfer has completed successfully, type the following flash 80000 80020000 <file length hex> Type go or simply restart the device to boot into OpenWRT Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr> Link: https://github.com/openwrt/openwrt/pull/19021 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
119 lines
2.6 KiB
Bash
Executable File
119 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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set -e
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# This is not necessary, but it makes finding the rootfs easier.
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PAD_ROOTFS_OFFSET_TO=4194304
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# Constant
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HDRLEN=256
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die() {
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echo "$1" >&2
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exit 1
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}
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[ $# -eq 3 ] || die "SYNTAX: $0 <kernel lzma> <rootfs squashfs> <version string>"
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kernel=$1
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rootfs=$2
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version=$3
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which zytrx >/dev/null || die "zytrx not found in PATH $PATH"
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[ -f "$kernel" ] || die "Kernel file not found: $kernel"
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[ -f "$rootfs" ] || die "Rootfs file not found: $rootfs"
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[ "$(echo "$version" | wc -c)" -lt 32 ] || die "Version string too long: $version"
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kernel_len=$(stat -c '%s' "$kernel")
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header_plus_kernel_len=$(($HDRLEN + $kernel_len))
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rootfs_len=$(stat -c '%s' "$rootfs")
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if [ "$PAD_ROOTFS_OFFSET_TO" -gt "$header_plus_kernel_len" ]; then
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padding_len=$(($PAD_ROOTFS_OFFSET_TO - $header_plus_kernel_len))
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else
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padding_len=0
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fi
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echo "padding_len: $padding_len" >&2
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padded_rootfs_len=$(($padding_len + $rootfs_len))
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echo "padded_rootfs_len: $padded_rootfs_len" >&2
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total_len=$(($header_plus_kernel_len + $padded_rootfs_len))
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echo "total_len: $total_len" >&2
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padding() {
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head -c $padding_len /dev/zero | tr '\0' '\377'
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}
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to_hex() {
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hexdump -v -e '1/1 "%02x"'
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}
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from_hex() {
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perl -pe 's/\s+//g; s/(..)/chr(hex($1))/ge'
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}
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trx_crc32() {
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tmpfile=$(mktemp)
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outtmpfile=$(mktemp)
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cat "$kernel" > "$tmpfile"
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padding >> "$tmpfile"
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cat "$rootfs" >> "$tmpfile"
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# We just need a CRC-32/JAMCRC of the concatnated files
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# There's no readily available tool for this, but zytrx does create one when
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# creating their TRX header, so we just use that.
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zytrx \
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-B NR7101 \
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-v x \
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-i "$tmpfile" \
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-o "$outtmpfile" >/dev/null
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dd if="$outtmpfile" bs=4 count=1 skip=3 | to_hex
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rm "$tmpfile" "$outtmpfile" >/dev/null
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}
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tclinux_trx_hdr() {
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# TRX header magic
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printf '2RDH' | to_hex
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# Length of the header
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printf '%08x\n' "$HDRLEN"
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# Length of header + content
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printf '%08x\n' "$total_len"
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# crc32 of the content
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trx_crc32
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# version
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echo "$version" | to_hex
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head -c "$((32 - $(echo "$version" | wc -c)))" /dev/zero | to_hex
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# customer version
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head -c 32 /dev/zero | to_hex
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# kernel length
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printf '%08x\n' "$kernel_len"
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# rootfs length
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printf '%08x\n' "$padded_rootfs_len"
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# romfile length (0)
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printf '00000000\n'
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# "model" (32 bytes of zeros)
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head -c 32 /dev/zero | to_hex
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# Load address (CONFIG_ZBOOT_LOAD_ADDRESS)
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printf '80020000\n'
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# "reserved" 128 bytes of zeros
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head -c 128 /dev/zero | to_hex
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}
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tclinux_trx_hdr | from_hex
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cat "$kernel"
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padding
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cat "$rootfs"
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