Chau Ly | b10e6e7 | 2023-04-13 04:40:02 +0000 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | # |
Chau Ly | b6eaef4 | 2023-10-18 14:02:04 +0000 | [diff] [blame^] | 3 | # Ampere Computing LLC: UART MUX/DEMUX for CPU0 UART0,1,4 and CPU1 UART1 |
| 4 | # Usage: ampere_uartmux_ctrl.sh <CPU UART port number> <UARTx_MODE> |
| 5 | # <UARTx_MODE> of 1 sets CPU To HDR_CONN |
| 6 | # <UARTx_MODE> of 2 sets BMC to CPU (eg dropbear ssh server on port 2200) |
| 7 | # |
Chau Ly | b10e6e7 | 2023-04-13 04:40:02 +0000 | [diff] [blame] | 8 | # This can be called to set uart mux manually |
| 9 | |
Chau Ly | b6eaef4 | 2023-10-18 14:02:04 +0000 | [diff] [blame^] | 10 | # shellcheck disable=SC2046 |
| 11 | |
Chau Ly | b10e6e7 | 2023-04-13 04:40:02 +0000 | [diff] [blame] | 12 | if [ $# -lt 2 ]; then |
| 13 | exit 1 |
| 14 | fi |
| 15 | |
| 16 | case "$1" in |
| 17 | 1) GPIO_UARTx_MODE0="uart1-mode0" |
| 18 | GPIO_UARTx_MODE1="uart1-mode1" |
| 19 | ;; |
| 20 | 2) GPIO_UARTx_MODE0="uart2-mode0" |
| 21 | GPIO_UARTx_MODE1="uart2-mode1" |
| 22 | ;; |
| 23 | 3) GPIO_UARTx_MODE0="uart3-mode0" |
| 24 | GPIO_UARTx_MODE1="uart3-mode1" |
| 25 | ;; |
| 26 | 4) GPIO_UARTx_MODE0="uart4-mode0" |
| 27 | GPIO_UARTx_MODE1="uart4-mode1" |
| 28 | ;; |
| 29 | *) echo "Invalid UART port selection" |
| 30 | exit 1 |
| 31 | ;; |
| 32 | esac |
| 33 | |
| 34 | echo "Ampere UART MUX CTRL UART port $1 to mode $2" |
| 35 | |
| 36 | case "$2" in |
| 37 | # To HDR |
| 38 | 1) gpioset $(gpiofind "$GPIO_UARTx_MODE0")=1 |
| 39 | gpioset $(gpiofind "$GPIO_UARTx_MODE1")=0 |
| 40 | exit 0 |
| 41 | ;; |
| 42 | # To BMC |
| 43 | 2) gpioset $(gpiofind "$GPIO_UARTx_MODE0")=0 |
| 44 | gpioset $(gpiofind "$GPIO_UARTx_MODE1")=1 |
| 45 | exit 0 |
| 46 | ;; |
| 47 | *) echo "Invalid UART mode selection" |
| 48 | exit 1 |
| 49 | ;; |
| 50 | esac |