| #!/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 |