#!/bin/sh

# Setup GPIO and I2C ports for raspicam

# Broadcom GPIO numbers used here

# http://elinux.org/RPi_HardwareHistory#Board_Revision_History

rev=`cat /proc/cpuinfo | grep Revision | awk '{print substr($NF,length($NF)-5,6)}'`
kernel=`uname -r  | head --bytes 1`

echo "setting GPIO for board revsion: $rev"

case $rev in
# Old revision code encodings first
'0002'|'0003')
echo "B Rev1 - I2C 1 on GPIOs 2 & 3. GPIOs 5 & 27 for LED and power"
if [ "$kernel" = "4" ]
then
	# i2c on these pins
	raspi-gpio set 0 ip
	raspi-gpio set 0 a0
	raspi-gpio set 1 ip
	raspi-gpio set 1 a0
fi
#shutdown
raspi-gpio set 27 op dh
#LED
raspi-gpio set 5 op dh
#
echo "Use 'raspiraw -y 1' to communicate with the sensor"
;;

'0004'|'0005'|'0006'|'000d'|'000e'|'000f')
echo "B Rev2 - I2C 0 on GPIOs 0 & 1. GPIOs 5 & 21 for LED and power"
# i2c on these pins
if [ "$kernel" = "4" ]
then
	raspi-gpio set 0 ip
	raspi-gpio set 0 a0
	raspi-gpio set 1 ip
	raspi-gpio set 1 a0
fi
#shutdown
raspi-gpio set 21 dh
#LED
raspi-gpio set 5 dh
;;

'0010'|'0012'|'0013'|'1041')
echo "A+, B+, B2, B2 (2837), and Zero (not W) all revisions - I2C 0 on GPIOs 28 & 29. GPIOs 32 & 41 for LED and power"
if [ "$kernel" = "4" ]
then
	# i2c can be on pins 0 and 1, so make sure they are not set to alt0
	raspi-gpio set 0 ip
	raspi-gpio set 1 ip
	# i2c on these pins
	raspi-gpio set 28 ip
	raspi-gpio set 28 a0
	raspi-gpio set 29 ip
	raspi-gpio set 29 a0
fi
#shutdown
raspi-gpio set 41 dh
#LED
raspi-gpio set 32 dh
;;

'0011'|'0014')
echo "Compute Module/ CM3 - I2C 0 on GPIO 0 & 1. GPIOs 2 & 3 for LED and power"
echo "Warning: This is just a default setting for cam1."
echo "Download dt-blob.bin from https://www.raspberrypi.org/documentation/hardware/computemodule/dt-blob-cam1.bin and place it in /boot/."
echo "For cable connection, see https://www.raspberrypi.org/documentation/hardware/computemodule/cmio-camera.md"
if [ "$kernel" = "4" ]
then
	# i2c can be on pins 28 and 29, so make sure they are not set to alt0
	raspi-gpio set 28 ip
	raspi-gpio set 29 ip
	# i2c on these pins
	raspi-gpio set 0 ip
	raspi-gpio set 0 a0
	raspi-gpio set 1 ip
	raspi-gpio set 1 a0
fi
# shutdown
raspi-gpio set 3 out
raspi-gpio set 3 dh
# LED
raspi-gpio set 2 out
raspi-gpio set 2 dh
;;

*)
	# New format revision encodings
	board_type=`cat /proc/cpuinfo | grep Revision | awk '{print substr($NF,length($NF)-2,2)}'`

	case $board_type in
	'02'|'03'|'04'|'09')
	echo "A+, B+, B2, B2 (2837), and Zero (not W) all revisions - I2C 0 on GPIOs 28 & 29. GPIOs 32 & 41 for LED and power"
	if [ "$kernel" = "4" ]
	then
		# i2c can be on pins 0 and 1, so make sure they are not set to alt0
		raspi-gpio set 0 ip
		raspi-gpio set 1 ip
		# i2c on these pins
		raspi-gpio set 28 ip
		raspi-gpio set 28 a0
		raspi-gpio set 29 ip
		raspi-gpio set 29 a0
	fi
	#shutdown
	raspi-gpio set 41 dh
	#LED
	raspi-gpio set 32 dh
	;;

	'0c')
	echo "PiZero W - I2C 0 on GPIO 28 & 29. GPIOs 40 & 44 for LED and power"
	if [ "$kernel" = "4" ]
	then
		# i2c can be on pins 0 and 1, so make sure they are not set to alt0
		raspi-gpio set 0 ip
		raspi-gpio set 1 ip
		# i2c on these pins
		raspi-gpio set 28 ip
		raspi-gpio set 28 a0
		raspi-gpio set 29 ip
		raspi-gpio set 29 a0
	fi
	# shutdown
	raspi-gpio set 44 dh
	# LED
	raspi-gpio set 40 dh
	;;

	'0a')
	echo "Compute Module/ CM3 - I2C 0 on GPIO 0 & 1. GPIOs 2 & 3 for LED and power"
	echo "Warning: This is just a default setting for cam1."
	echo "Download dt-blob.bin from https://www.raspberrypi.org/documentation/hardware/computemodule/dt-blob-cam1.bin and place it in /boot/."
	echo "For cable connection, see https://www.raspberrypi.org/documentation/hardware/computemodule/cmio-camera.md"
	if [ "$kernel" = "4" ]
	then
		# i2c can be on pins 28 and 29, so make sure they are not set to alt0
		raspi-gpio set 28 ip
		raspi-gpio set 29 ip
		# i2c on these pins
		raspi-gpio set 0 ip
		raspi-gpio set 0 a0
		raspi-gpio set 1 ip
		raspi-gpio set 1 a0
	fi
	# shutdown
	raspi-gpio set 3 out
	raspi-gpio set 3 dh
	# LED
	raspi-gpio set 2 out
	raspi-gpio set 2 dh
	;;

	'08'|'0d'|'0e')
	echo "Raspberry Pi3B / Pi3B+ / 3A"
	# https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=100
	# Pins 44&45 Alt1=i2c0, alt2=i2c1
	if [ "$kernel" = "4" ]
	then
		# i2c0 can be on pins 0 and 1, so make sure they are not set to alt0
		raspi-gpio set 0 ip
		raspi-gpio set 1 ip
		raspi-gpio set 28 ip
		raspi-gpio set 29 ip
		# i2c on these pins
		raspi-gpio set 44 ip
		raspi-gpio set 44 a1
		raspi-gpio set 45 ip
		raspi-gpio set 45 a1
	fi
	#shutdown
	# you need this one: https://github.com/6by9/rpi3-gpiovirtbuf
	#raspi-gpio set 41 1
	`dirname $0`/rpi3-gpiovirtbuf s 133 1
	#LED
	#raspi-gpio set 32 1
	;;

	'11')
	echo "4B(1G/2G/4G/8G)"
	# https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=100
	# Pins 44&45 Alt1=i2c0, alt2=i2c1
	# i2c0 can be on pins 0 and 1, so make sure they are not set to alt0
	if [ "$kernel" = "4" ]
	then
		# Do NOT alter 28&29 as they are used by the ethernet PHY.
		raspi-gpio set 0 ip
		raspi-gpio set 1 ip
		# i2c on these pins
		raspi-gpio set 44 ip
		raspi-gpio set 44 a1
		raspi-gpio set 45 ip
		raspi-gpio set 45 a1
	fi
	#shutdown
	# you need this one: https://github.com/6by9/rpi3-gpiovirtbuf
	#raspi-gpio set 41 1
	`dirname $0`/rpi3-gpiovirtbuf s 133 1
	#LED
	#raspi-gpio set 32 1
	;;

	'12')
	echo "PiZero2W"
	# Pins 44&45 Alt1=i2c0, alt2=i2c1
	# i2c0 can be on pins 0 and 1, so make sure they are not set to alt0
	if [ "$kernel" = "4" ]
	then
		# Do NOT alter 28&29 as they are used by the ethernet PHY.
		raspi-gpio set 0 ip
		raspi-gpio set 1 ip
		# i2c on these pins
		raspi-gpio set 44 ip
		raspi-gpio set 44 a1
		raspi-gpio set 45 ip
		raspi-gpio set 45 a1
	fi
	#shutdown
	raspi-gpio set 40 dh
	# No LED line.
	;;

	'13')
	# Pi400
	echo "Failed: Pi400 doesn't have a camera connector"
	;;

	'14')
	# CM4
	echo "CM4 - assume CAM1 on 44&45"
	if [ "$kernel" = "4" ]
	then
		# i2c can be on pins 44 and 45, so make sure they are not set to alt0
		raspi-gpio set 44 ip
		raspi-gpio set 45 ip
		# i2c on these pins
		raspi-gpio set 0 ip
		raspi-gpio set 0 a0
		raspi-gpio set 1 ip
		raspi-gpio set 1 a0
	fi
	# shutdown
	`dirname $0`/rpi3-gpiovirtbuf s 133 1
	;;

	*)
	echo "Failed: don't know how to set GPIO for this board! Type is $board_type"
	;;

	esac
;;
esac

if [ "$kernel" = "4" ]
then
	echo "Use i2c-0 for the sensor (-y 0)"
else
	echo "Use i2c-10 for the sensor (-y 10)"
fi