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#!/bin/bash
#
# Copyright (c) 2021 Ampere Computing LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Ampere Computing LLC: UART MUX/DEMUX for CPU0 UART0,1,4 and CPU1 UART1
# Usage: ampere_uartmux_ctrl.sh <CPU UART port number> <UARTx_MODE>
# <UARTx_MODE> of 1 sets CPU To HDR_CONN
# <UARTx_MODE> of 2 sets BMC to CPU (eg dropbear ssh server on port 2200)
# shellcheck disable=SC2046
if [ $# -lt 2 ]; then
exit 1
fi
case "$1" in
1) GPIO_UARTx_MODE0="uart1-mode0"
GPIO_UARTx_MODE1="uart1-mode1"
;;
2) GPIO_UARTx_MODE0="uart2-mode0"
GPIO_UARTx_MODE1="uart2-mode1"
;;
3) GPIO_UARTx_MODE0="uart3-mode0"
GPIO_UARTx_MODE1="uart3-mode1"
;;
4) GPIO_UARTx_MODE0="uart4-mode0"
GPIO_UARTx_MODE1="uart4-mode1"
;;
*) echo "Invalid UART port selection"
exit 1
;;
esac
echo "Ampere UART MUX CTRL UART port $1 to mode $2"
case "$2" in
1)
if gpiofind "$GPIO_UARTx_MODE0"; then
gpioset $(gpiofind "$GPIO_UARTx_MODE0")=1
fi
if gpiofind "$GPIO_UARTx_MODE1"; then
gpioset $(gpiofind "$GPIO_UARTx_MODE1")=0
fi
exit 0
;;
2)
if gpiofind "$GPIO_UARTx_MODE0"; then
gpioset $(gpiofind "$GPIO_UARTx_MODE0")=0
fi
if gpiofind "$GPIO_UARTx_MODE1"; then
gpioset $(gpiofind "$GPIO_UARTx_MODE1")=1
fi
exit 0
;;
*) echo "Invalid UART mode selection"
exit 1
;;
esac
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