utils/ucmb/Makefile

   1 #
   2 # Copyright (C) 2009 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6
   7 include $(TOPDIR)/rules.mk
   8 include $(INCLUDE_DIR)/kernel.mk
   9
  10 PKG_NAME:=ucmb
  11 PKG_RELEASE:=1
  12
  13 include $(INCLUDE_DIR)/package.mk
  14
  15
  16 define KernelPackage/ucmb
  17   SUBMENU:=Other modules
  18   DEPENDS:=@LINUX_2_6 \
  19           @!LINUX_2_6_21 @!LINUX_2_6_22 @!LINUX_2_6_23 @!LINUX_2_6_24 \
  20           @!LINUX_2_6_25 @!LINUX_2_6_26 @!LINUX_2_6_27 \
  21           +kmod-spi-gpio +kmod-crc16
  22   KCONFIG:=CONFIG_SPI=y \
  23           CONFIG_SPI_MASTER=y
  24   TITLE:=Microcontroller Message Bus
  25   FILES:=$(PKG_BUILD_DIR)/ucmb.$(LINUX_KMOD_SUFFIX)
  26   AUTOLOAD:=$(call AutoLoad,93,ucmb)
  27   MAINTAINER:=Michael Buesch <mb@bu3sch.de>
  28 endef
  29
  30 define KernelPackage/ucmb/description
  31         The Microcontroller Message Bus is a tiny SPI-GPIO based communication
  32         channel used to talk to microcontrollers over GPIO pins.
  33         The lowlevel protocol is CRC16 protected, so one can be pretty sure
  34         that the data transmitted and received through the /dev/ucmb node is not corrupted.
  35         So no further checks should be needed at upper protocol layers.
  36         The device node considers every read/write to be one packet. The maximum packet
  37         size is either PAGE_SIZE (at least 4kb) or the microcontroller specific packet size
  38         limit, which is likely to be a lot smaller than PAGE_SIZE.
  39         To register an ucmb device, simply create a struct ucmb_platform_data
  40         and register it via ucmb_device_register() from another kernel module.
  41         Example implementations for the microcontroller-side code can be found in
  42         the utils/ucmb/microcontroller_examples subdirectory of the OpenWRT packages feed.
  43 endef
  44
  45 define Build/Prepare
  46         $(CP) ./driver/* $(PKG_BUILD_DIR)/
  47 endef
  48
  49 define Build/Compile
  50         $(MAKE) -C "$(LINUX_DIR)" \
  51                 CROSS_COMPILE="$(TARGET_CROSS)" \
  52                 ARCH="$(LINUX_KARCH)" \
  53                 SUBDIRS="$(PKG_BUILD_DIR)" \
  54                 EXTRA_CFLAGS="$(BUILDFLAGS)" \
  55                 modules
  56 endef
  57
  58 define Build/InstallDev
  59         $(INSTALL_DIR) $(1)/usr/include
  60         $(CP) \
  61                 $(PKG_BUILD_DIR)/ucmb.h \
  62                 $(1)/usr/include
  63 endef
  64
  65 $(eval $(call KernelPackage,ucmb))