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|
#!/bin/sh
machine_id() { # return the machine ID
awk 'BEGIN { FS=": " } /Hardware/ { gsub(" ", "_", $2); print tolower($2) } ' </proc/cpuinfo
}
if [ $# -ne 4 ] && [ $# -ne 6 ];
then
echo "Usage:"
echo ""
echo "writeprom.sh vendorid deviceid rev fab_rev [envvar envsetting]"
echo
echo " vendorid, deviceid - expansion board device number from http://www.elinux.org/BeagleBoardPinMux#Vendor_and_Device_IDs"
echo
echo " rev - board revision (e.g. 0x00)"
echo " fab_rev - revision marking from pcb (e.g. R2411)"
echo " envvar - optional u-boot env variable name"
echo " (e.g. dvimode)"
echo " envsetting - optional u-boot env variable setting"
echo " (e.g. 1024x768MR-16@60)"
echo
echo "Don't forget to make the EEPROM writeable if it has a writeprotect jumper!"
exit 1
fi
fabrevision=$4
if [ ${#fabrevision} -ge 8 ]; then
echo "Error: fab revision string must less than 8 characters"
exit 1
fi
envvar=$5
if [ ${#envar} -ge 16 ]; then
echo "Error: environment variable name string must less than 16 characters"
exit 1
fi
envsetting=$6
if [ ${#ensetting} -ge 64 ]; then
echo "Error: environment setting string must less than 64 characters"
exit 1
fi
case `machine_id` in
"omap3_beagle_board")
bus=2
device=0x50
;;
*)
bus=3
device=0x51
;;
esac
device=0x50
vendorid=$1
if [ ${#vendorid} -ge 6 ]; then
echo "Error: vendorid number must be less than 6 digits"
exit 1
fi
i2cset -y $bus $device 0x00 0x00
i2cset -y $bus $device 0x01 $vendorid
i2cset -y $bus $device 0x02 0x00
i2cset -y $bus $device 0x03 $2
i2cset -y $bus $device 0x04 $3
i2cset -y $bus $device 0x05 00
let i=6
hexdumpargs="'${#fabrevision}/1 \"0x%02x \"'"
command="echo -n \"$fabrevision\" | hexdump -e $hexdumpargs"
hex=$(eval $command)
for character in $hex; do
i2cset -y $bus $device $i $character
let i=$i+1
done
i2cset -y $bus $device $i 0x00
if [ $# -eq 5 ]
then
i2cset -y $bus $device 0x05 0x01
let i=14
hexdumpargs="'${#envvar}/1 \"0x%02x \"'"
command="echo -n \"$envvar\" | hexdump -e $hexdumpargs"
hex=$(eval $command)
for character in $hex; do
i2cset -y $bus $device $i $character
let i=$i+1
done
i2cset -y $bus $device $i 0x00
let i=30
hexdumpargs="'${#envsetting}/1 \"0x%02x \"'"
command="echo -n \"$envsetting\" | hexdump -e $hexdumpargs"
hex=$(eval $command)
for character in $hex; do
i2cset -y $bus $device $i $character
let i=$i+1
done
i2cset -y $bus $device $i 0x00
fi
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