freifunkist-firmware/package/mmc_over_gpio/files/mmc_over_gpio.init

#!/bin/sh /etc/rc.common
# Copyright (C) 2008 OpenWrt.org
START=90

CONFIGFS_DIR="/config/gpiommc"

# add_device(name, DI_pin, DO_pin, CLK_pin, CS_pin, mode)
add_device() {
	local dir="$CONFIGFS_DIR/$1"

	mkdir $dir
	[ $? -eq 0 ] || return 1
	echo $2 > $dir/gpio_data_in
	[ $? -eq 0 ] || return 1
	echo $3 > $dir/gpio_data_out
	[ $? -eq 0 ] || return 1
	echo $4 > $dir/gpio_clock
	[ $? -eq 0 ] || return 1
	echo $5 > $dir/gpio_chipselect
	[ $? -eq 0 ] || return 1
	echo $6 > $dir/spi_mode
	[ $? -eq 0 ] || return 1
	# XXX We have more config options available. Use defaults for now.

	echo 1 > $dir/register
	[ $? -eq 0 ] || return 1

	return 0
}

# remove_device(name)
remove_device() {
	local dir="$CONFIGFS_DIR/$1"

	rmdir $dir
}

mount_configfs() {
	# FIXME: This should probably be done somewhere else.
	mount | grep configfs
	if [ $? -eq 0 ]; then
		# already mounted
		return 0
	fi
	mkdir -p /config
	[ $? -eq 0 ] || return 1
	mount configfs -t configfs /config
	[ $? -eq 0 ] || return 1

	return 0
}

start() {
	# Make sure configfs is mounted
	mount_configfs
	[ $? -eq 0 ] || return 1

	#FIXME we should use a config file, but I dunno how that parser works.
	add_device "default" 5 4 3 7 0
}

stop() {
	remove_device "default"
}