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diff --git a/openwrt/docs/buildroot-documentation.html b/openwrt/docs/buildroot-documentation.html index 85cce4780..a94bccf1a 100644 --- a/openwrt/docs/buildroot-documentation.html +++ b/openwrt/docs/buildroot-documentation.html @@ -17,7 +17,7 @@ <p>Usage and documentation by Felix Fietkau and Waldemar Brodkorb, based on uClibc Buildroot documentation by Thomas Petazzoni. Contributions from Karsten Kruse, - Ned Ludd, Martin Herren.</p> + Ned Ludd, Martin Herren. OpenWrt Kernel Module Creation Howto by Markus Becker.</p> <p><small>Last modification : $Id$</small></p> @@ -37,6 +37,14 @@ <li><a href="#downloaded_packages">Location of downloaded packages</a></li> <li><a href="#add_software">Extending OpenWrt with more Software</a></li> <li><a href="#links">Ressources</a></li> +<br> + <li><a href="#about_module">About OpenWrt Kernel Module Compilation</a></li> + <li><a href="#kernel">Enable the kernel options</a></li> + <li><a href="#buildroot_option">Create a buildroot option</a></li> + <li><a href="#binary">Define the binary files for the kernel module</a></li> + <li><a href="#control">Specify the ipkg control file</a></li> + <li><a href="#compile">Compile the kernel module</a></li> + </ul> <h2><a name="about" id="about"></a>About OpenWrt Buildroot</h2> @@ -602,5 +610,94 @@ foo-compile: bar-compile <a href="http://openwrt.org/">http://openwrt.org/</a></p> </div> + + <div class="main"> + <div class="titre"> + <h1>OpenWrt Kernel Module Creation Howto</h1> + </div> + + <h2><a name="about_module" id="about_module"></a>About OpenWrt Kernel Module Compilation</h2> + + <p>You are planning to compile a kernel module? This howto will +explain what you have to do, to have your kernel module installable as +an ipkg.</p> + + <h2><a name="kernel" id="kernel"></a>Enable the kernel options</h2> + + <p>Enable the kernel options you want by modifying +build_mipsel/linux/.config. We are assuming, that you already had your +kernel compiled once here. You can do the modification by hand or by + +<pre> +$ cd build_mipsel/linux +$ make menuconfig +</pre> + +And copy it, so your changes are not getting lost, when doing a 'make +dirclean'. Here we assume that you are compiling for Broadcom chipset +based devices: + +<pre> $ cp .config ../../../target/linux/linux-2.4/config/brcm </pre> + +</p> + <h2><a name="buildroot_option" id="buildroot_option"></a>Create a buildroot option</h2> + + <p>Create a buildroot option by modifying/inserting into +target/linux/Config.in, e.g. + +<pre> +config BR2_PACKAGE_KMOD_USB_KEYBOARD + tristate "Support for USB keyboards" + default m + depends BR2_PACKAGE_KMOD_USB_CONTROLLER +</pre> +</p> + + <h2><a name="binary" id="binary"></a>Define the binary files for the kernel module</h2> + + <p>Define the binary files for the kernel module by modifying/inserting into +target/linux/linux-2.4/Makefile, e.g. + +<pre> +$(eval $(call KMOD_template,USB_KEYBOARD,usb-kbd,\ + $(MODULES_DIR)/kernel/drivers/input/input.o \ + $(MODULES_DIR)/kernel/drivers/input/keybdev.o \ + $(MODULES_DIR)/kernel/drivers/usb/usbkbd.o \ +,CONFIG_USB_KEYB,kmod-usb-core,60,input keybdev usbkbd)) +</pre> + +Where CONFIG_USB_KEYB is the kernel option, USB_KEYBOARD is the last +part of BR2_PACKAGE_KMOD_USB_KEYBOARD and usb-kbd is part of the +filename of the created ipkg.</p> + + <h2><a name="control" id="control"></a>Specify the ipkg control file</h2> + + <p>Create e.g. target/linux/control/kmod-usb-kbd.control with content similar to this: + +<pre> +Package: kmod-usb-kbd +Priority: optional +Section: sys +Maintainer: Markus Becker <mab@comnets.uni-bremen.de> +Source: buildroot internal +Description: Kernel Support for USB Keyboards +</pre> + </p> + + <h2><a name="compile" id="compile"></a>Compile the kernel module</h2> + + <p>Enable the kernel module with +<pre> +$ make menuconfig +</pre> + in TOPDIR and selecting it.<br> + + Compile with +<pre> +$ make dirclean && make +</pre> + </p> + </div> + </body> </html> |