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#!/bin/bash # Simple shell script to wait for the tty for an uart using BT HCI to show up # and then invoke btattach with the right parameters, this is intended to be # invoked from a hardware-activated systemd service # # For now this only suports ACPI enumerated Broadcom BT HCIs. # This has been tested on Bay and Cherry Trail devices with both ACPI and # PCI enumerated UARTs. # # Note the kernel bt developers are working on solving this entirely in the # kernel, so it is not worth the trouble to write something better then this. BT_DEV="/sys/bus/platform/devices/$1" BT_DEV="$(readlink -f $BT_DEV)" UART_DEV="$(dirname $BT_DEV)" # Stupid GPD-pocket has USB BT with id 0000:0000, but still claims to have # an uart attached bt if [ "$1" = "BCM2E7E:00" ] && lsusb | grep -q "ID 0000:0000"; then exit 0 fi while [ ! -d "$UART_DEV/tty" ]; do sleep .2 done TTY="$(ls $UART_DEV/tty)" exec btattach --bredr "/dev/$TTY" -P bcm
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