Script to suspend all USB devices

usb-suspend.sh

#!/bin/sh

DEV_ROOT=/sys/bus/usb/devices

read_usb_sysfs() {
    cat "$DEV_ROOT/$1/$2"
}

write_usb_sysfs() {
    path="$DEV_ROOT/$1/$2"
    [ -e "$path" ] && echo $3 > "$path"
}

device_id() {
    vendor=$(read_usb_sysfs "$device" idVendor)
    product=$(read_usb_sysfs "$device" idProduct)
    echo "$vendor:$product"
}

unbind_driver() {
    interface=$1
    device=$(echo $interface | cut -d: -f1)
    [ -e "$DEV_ROOT/$device" ] || return
    # Unbind drivers for the Logitech G710 keyboard
    case $(device_id "$device") in 046d:c24d)
        write_usb_sysfs "$interface" driver/unbind "$interface"
    esac
}

for device in $(ls -1 "$DEV_ROOT" | sort -r); do
    case "$device" in
    *:*)  # Only unbind drivers for certain interfaces
        unbind_driver "$device"
        continue ;;
    usb*)  # Ignore USB hubs
        continue ;;
    esac

    # Suspend USB devices
    write_usb_sysfs "$device" power/autosuspend_delay_ms 0
    write_usb_sysfs "$device" power/wakeup disabled
    write_usb_sysfs "$device" power/control auto
done