freifunkist-firmware/package/kernel/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 -p $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_service() {
	local section="$1"
	config_get "name" "$section" "name"
	config_get "DI_pin" "$section" "DI_pin"
	config_get "DO_pin" "$section" "DO_pin"
	config_get "CLK_pin" "$section" "CLK_pin"
	config_get "CS_pin" "$section" "CS_pin"
	config_get "mode" "$section" "mode"
	config_get_bool "enabled" "$section" "enabled" '1'
	[ "$enabled" -gt 0 ] && add_device "$name" $DI_pin $DO_pin $CLK_pin $CS_pin $mode &
}

stop_service() {
	local section="$1"
	config_get "name" "$section" "name"
	remove_device "$name"
}

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

	config_load "mmc_over_gpio"
	config_foreach start_service "mmc_over_gpio"
}

stop() {
	config_load "mmc_over_gpio"
	config_foreach stop_service "mmc_over_gpio"
}