forked from Openwrt-EcoNet/openwrt
e15be27627
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>
113 lines
2.7 KiB
Bash
Executable File
113 lines
2.7 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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part=
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offset_blocks=
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block_size=
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code_openwrt=
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code_factory=
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code_offset=
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read_nand() {
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dd "if=$part" "of=$file" "bs=$block_size" "skip=$offset_blocks" count=1 2>/dev/null
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}
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write_nand() {
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flash_erase -N -q "$part" $((offset_blocks * block_size)) 1
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dd "if=$file" "of=$part" "bs=$block_size" "seek=$offset_blocks" count=1 2>/dev/null
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}
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part_named() {
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name=$1
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pn=$(grep "$name" < /proc/mtd | sed 's/:.*//')
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if [ -z "$pn" ]; then
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echo "Partition not found: $name"
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exit 1
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fi
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echo "/dev/$pn"
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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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sed 's/\([0-9a-fA-F]\{2\}\)/echo -n -e "\\x\1"\n/g' | sh
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}
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check() {
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stored_code=$(dd \
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"if=$part" \
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bs=1 \
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skip=$((offset_blocks * block_size + code_offset)) \
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count=$((${#code_openwrt} / 2)) \
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2>/dev/null | to_hex
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)
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if [ "$stored_code" = "$code_openwrt" ]; then
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echo "Current boot flag set to OS A (OpenWrt)"
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elif [ "$stored_code" = "$code_factory" ]; then
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echo "Current boot flag set to OS B (Factory)"
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else
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echo "Current boot flag unknown: $stored_code"
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fi
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}
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switch() {
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switch_to=$1
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echo "Switching boot flag to $switch_to"
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file=$(mktemp)
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read_nand
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if [ "$switch_to" = "factory" ]; then
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echo "$code_factory" | from_hex | \
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dd "of=$file" bs=1 "seek=$code_offset" conv=notrunc 2>/dev/null
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elif [ "$switch_to" = "openwrt" ]; then
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echo "$code_openwrt" | from_hex | \
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dd "of=$file" bs=1 "seek=$code_offset" conv=notrunc 2>/dev/null
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else
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echo "Invalid switch_to: $switch_to"
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exit 1
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fi
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write_nand
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rm "$file"
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echo "Flash write complete"
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check
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}
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main() {
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machine=$(sed -n -e 's/^machine\s\+:\s\+//p' < /proc/cpuinfo)
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if [ "$machine" = "TP-Link Archer VR1200v (v2)" ]; then
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# 03fe0000
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part=$(part_named '"reserve"')
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offset_blocks=0
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block_size=$((1024 * 128))
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code_offset=0
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code_openwrt=0000000101000002
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code_factory=0000000101010003
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elif [ "$machine" = "SmartFiber XP8421-B" ]; then
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# 0dfc0000
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part=$(part_named '"reservearea"')
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offset_blocks=12
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block_size=$((1024 * 128))
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code_offset=0
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code_openwrt=30000000
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code_factory=31000000
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else
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echo "Unsupported machine: $machine"
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exit 1
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fi
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if [ "$1" = "factory" ]; then
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switch factory
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elif [ "$1" = "openwrt" ]; then
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switch openwrt
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else
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echo "Usage: $0 factory|openwrt # Change boot flag to Factory OS or OpenWrt"
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check
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exit 1
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fi
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}
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main "$@"
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