62 lines
1.1 KiB
Bash
62 lines
1.1 KiB
Bash
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#!/bin/sh
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# Select UART Mux: UART Mux for switching between Host and BIC on Slot1 ~ Slot4
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# Usage: select-uart-mux <slot1|slot2|slot3|slot4> <host|bic>
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REG_OFFSET="0x01"
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input_slot=$1
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input_target=$2
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i2c_bus_id=
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show_usage() {
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echo "Usage: select-uart-mux [ slot1 | slot2 | slot3 | slot4 ] [ host | bic ]"
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echo "Select UART Mux"
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}
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if [ $# -gt 3 ]; then
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show_usage
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exit 255
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fi
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case $input_slot in
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slot1)
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i2c_bus_id="4"
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;;
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slot2)
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i2c_bus_id="5"
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;;
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slot3)
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i2c_bus_id="6"
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;;
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slot4)
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i2c_bus_id="7"
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;;
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*)
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echo "Slot must between 1 to 4."
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show_usage
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exit 255
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;;
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esac
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case $input_target in
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host)
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reg_val="0x03"
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;;
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bic)
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reg_val="0x04"
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;;
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*)
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echo "Input must be host or bic."
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show_usage
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exit 255
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esac
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i2ctransfer -y -f $i2c_bus_id w2@0x0f $REG_OFFSET $reg_val
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val=$(i2ctransfer -y -f $i2c_bus_id w1@0x0f $REG_OFFSET r1)
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ret=$?
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if [ $ret -ne 0 ] || [ "$val" != $reg_val ]; then
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echo "Failed to modify the register value, the register value is $val instead of $reg_val."
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exit 255
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fi
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