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September 5, 2021 07:25
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Updated version of Carl-Daniel Hailfinger's script for detecting USB EHCI debug ports
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#!/usr/bin/env bash | |
# Copyright 2008 Carl-Daniel Hailfinger | |
# Small fixes by Ivan Vatlin (C) 2021 | |
# Original script: http://www.coreboot.org/pipermail/coreboot/attachments/20140530/245547f8/attachment.sh | |
# Link was taken from this article: https://www.coreboot.org/EHCI_Debug_Port | |
LANG=C | |
dmesgfile=$1 | |
debug_lspci_devs=$(lspci -nvvD | | |
grep -i "^[0-9a-f]\|debug port" | | |
grep -iB1 --no-group-separator "debug port" | | |
grep -vi "debug port" | | |
cut -f 1 -d" " | | |
sort | | |
xargs echo) | |
test -z "$debug_lspci_devs" && | |
debug_lspci_devs="None" | |
echo "The following PCI devices support a USB debug port (says lspci): $debug_lspci_devs" | |
test "$debug_lspci_devs" = "None" && | |
echo "Possible reasons: | |
+ lspci not run as root, | |
+ lspci too old, | |
+ USB controller does not support a debug device" | |
# shellcheck disable=SC2015 | |
debug_dmesg_devs_with_port=$( (test -z "$dmesgfile" && | |
dmesg || | |
cat "$dmesgfile") | | |
grep -i "ehci.*debug port" | | |
sed "s/.* \([0-9a-f]*:*[0-9a-f]\{2\}:[0-9a-f]\{2\}\.[0-9a-f]\).*ebug port /\1 /" | | |
sort | |
) | |
debug_dmesg_devs=$(echo "$debug_dmesg_devs_with_port" | | |
cut -f 1 -d" " | | |
xargs echo | |
) | |
test -z "$debug_dmesg_devs" && debug_dmesg_devs="None" | |
echo "The following PCI devices support a USB debug port (says the kernel): $debug_dmesg_devs" | |
test "$debug_dmesg_devs" = "None" && { | |
echo "Possible reasons: | |
+ dmesg scrolled off, | |
+ kernel too old, | |
+ USB controller does not support a debug device" | |
test "$debug_lspci_devs" != "None" && | |
echo "You can specify a file containing kernel bootup messages as argument to this program" | |
} | |
test "$debug_lspci_devs" != "$debug_dmesg_devs" && { | |
echo "lspci and the kernel do not agree on USB debug device support. Exiting." | |
exit 1 | |
} | |
test "$debug_dmesg_devs" = "None" && { | |
echo "No USB controller with debug capability found" | |
exit 1 | |
} | |
for dev in $debug_dmesg_devs; do | |
bus=$(lsusb -v | | |
grep "^Bus\|iSerial.*" | | |
grep -B1 --no-group-separator "iSerial.*$dev" | | |
grep "^Bus" | | |
sed "s/Bus *0*\([0-9a-f]*\).*/\1/" | |
) | |
port=$(echo "$debug_dmesg_devs_with_port" | | |
grep "^$dev" | | |
cut -f 2 -d" " | |
) | |
echo "PCI device $dev, USB bus $bus, USB physical port $port" | |
done | |
echo "Currently connected high-speed devices:" | |
lsusb -t | | |
grep 480M |
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