3 files changed, 168 insertions, 0 deletions
diff --git a/package/kernel/mmc_over_gpio/Makefile b/package/kernel/mmc_over_gpio/Makefile
new file mode 100644
index 0000000..69985a7
--- /dev/null
+++ b/package/kernel/mmc_over_gpio/Makefile
@@ -0,0 +1,77 @@
+#
+# Copyright (C) 2008 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=mmc-over-gpio
+PKG_RELEASE:=4
+
+include $(INCLUDE_DIR)/package.mk
+
+
+define KernelPackage/mmc-over-gpio
+  SUBMENU:=Other modules
+  DEPENDS:=@GPIO_SUPPORT +kmod-mmc-spi +kmod-spi-gpio-old +kmod-fs-configfs
+  KCONFIG:=CONFIG_GPIOMMC
+  TITLE:=MMC/SD card over GPIO support
+  FILES:=$(LINUX_DIR)/drivers/mmc/host/gpiommc.ko
+  AUTOLOAD:=$(call AutoProbe,gpiommc)
+  MENU:=1
+endef
+
+define Package/kmod-mmc-over-gpio/config
+	menu "Configuration"
+		depends on PACKAGE_kmod-mmc-over-gpio
+
+	config KMOD_MMC_OVER_GPIO_DI_PIN
+		int "GPIO DI (Data-In) pin"
+		default 1
+
+	config KMOD_MMC_OVER_GPIO_DO_PIN
+		int "GPIO DO (Data-Out) pin"
+		default 3
+
+	config KMOD_MMC_OVER_GPIO_CLK_PIN
+		int "GPIO CLK (Clock) pin"
+		default 4
+
+	config KMOD_MMC_OVER_GPIO_CS_PIN
+		int "GPIO CS (Chip-Select) pin"
+		default 7
+
+	endmenu
+endef
+
+define KernelPackage/mmc-over-gpio/description
+ Support for driving an MMC/SD card over GPIO pins via SPI.
+endef
+
+define KernelPackage/mmc-over-gpio/conffiles
+/etc/config/mmc_over_gpio
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Compile
+endef
+
+define KernelPackage/mmc-over-gpio/install
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_DATA) ./files/mmc_over_gpio.config $(1)/etc/config/mmc_over_gpio
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/mmc_over_gpio.init $(1)/etc/init.d/mmc_over_gpio
+
+	$(SED) 's,@GPIO_DI_PIN@,$(CONFIG_KMOD_MMC_OVER_GPIO_DI_PIN),g' \
+		-e 's,@GPIO_DO_PIN@,$(CONFIG_KMOD_MMC_OVER_GPIO_DO_PIN),g' \
+		-e 's,@GPIO_CLK_PIN@,$(CONFIG_KMOD_MMC_OVER_GPIO_CLK_PIN),g' \
+		-e 's,@GPIO_CS_PIN@,$(CONFIG_KMOD_MMC_OVER_GPIO_CS_PIN),g' \
+		$(1)/etc/config/mmc_over_gpio
+endef
+
+$(eval $(call KernelPackage,mmc-over-gpio))
diff --git a/package/kernel/mmc_over_gpio/files/mmc_over_gpio.config b/package/kernel/mmc_over_gpio/files/mmc_over_gpio.config
new file mode 100644
index 0000000..23f0084
--- /dev/null
+++ b/package/kernel/mmc_over_gpio/files/mmc_over_gpio.config
@@ -0,0 +1,8 @@
+config 'mmc_over_gpio'
+	option 'name' 'default'
+	option 'enabled' '0'
+	option 'DI_pin' '@GPIO_DI_PIN@'
+	option 'DO_pin' '@GPIO_DO_PIN@'
+	option 'CLK_pin' '@GPIO_CLK_PIN@'
+	option 'CS_pin' '@GPIO_CS_PIN@'
+	option 'mode' '0'
diff --git a/package/kernel/mmc_over_gpio/files/mmc_over_gpio.init b/package/kernel/mmc_over_gpio/files/mmc_over_gpio.init
new file mode 100644
index 0000000..121c803
--- /dev/null
+++ b/package/kernel/mmc_over_gpio/files/mmc_over_gpio.init
@@ -0,0 +1,83 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2008 OpenWrt.org
+START=90
+
+CONFIGFS_DIR="/config/gpiommc"
+
+# add_device(name, DI_pin, DO_pin, CLK_pin, CS_pin, mode)
+add_device() {
+	local dir="$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"
+}