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 $(INCLUDE_DIR)/package.mk
  14
  15
  16 define KernelPackage/ucmb
  17   SUBMENU:=Other modules
  18   DEPENDS:=@LINUX_2_6 +kmod-spi-gpio +kmod-crc16
  19   KCONFIG:=CONFIG_SPI=y \
  20           CONFIG_SPI_MASTER=y
  21   TITLE:=Microcontroller Message Bus
  22   FILES:=$(PKG_BUILD_DIR)/ucmb.$(LINUX_KMOD_SUFFIX)
  23   AUTOLOAD:=$(call AutoLoad,93,ucmb)
  24 endef
  25
  26 define KernelPackage/ucmb/description
  27         The Microcontroller Message Bus is a tiny SPI-GPIO based communication
  28         channel used to talk to microcontrollers over GPIO pins.
  29         The lowlevel protocol is CRC16 protected, so one can be pretty sure
  30         that the data transmitted and received through the /dev/ucmb node is not corrupted.
  31         So no further checks should be needed at upper protocol layers.
  32         The device node considers every read/write to be one packet. The maximum packet
  33         size is either PAGE_SIZE (at least 4kb) or the microcontroller specific packet size
  34         limit, which is likely to be a lot smaller than PAGE_SIZE.
  35         To register an ucmb device, simply create a struct ucmb_platform_data
  36         and register it via ucmb_device_register() from another kernel module.
  37         Example implementations for the microcontroller-side code can be found in
  38         the utils/ucmb/microcontroller_examples subdirectory of the OpenWRT packages feed.
  39 endef
  40
  41 define Build/Prepare
  42         mkdir -p $(PKG_BUILD_DIR)
  43         $(CP) ./driver/* $(PKG_BUILD_DIR)/
  44 endef
  45
  46 define Build/Compile
  47         $(MAKE) -C "$(LINUX_DIR)" \
  48                 CROSS_COMPILE="$(TARGET_CROSS)" \
  49                 ARCH="$(LINUX_KARCH)" \
  50                 SUBDIRS="$(PKG_BUILD_DIR)" \
  51                 EXTRA_CFLAGS="$(BUILDFLAGS)" \
  52                 modules
  53 endef
  54
  55 $(eval $(call KernelPackage,ucmb))