Hacking Linux for chumby
Alpha Prototype
The Alpha Prototype chumby runs a modified linux 2.4.20 kernel.
Compiling the Kernel
First, install the GCC Toolchain.
In order to build the chumby kernel, you can download the kernel source from chumby_kernel.tgz and build by doing the following:
# mkdir kernel # cd kernel # tar zxvf chumby_kernel.tgz # make menuconfig (then immediately exit and save the config) # make dep # make Image
If all goes well, you should end up with an uncompressed kernel image at arch/arm/boot/Image.
Ironforge
The "Ironforge" production chumby runs Linux 2.6.16 kernel.
First install the GNU Toolchain
In order to build the chumby kernel, you can download the kernel source from linux-2.6.16-chumby-1.0.tar.gz and build by doing the following:
# mkdir kernel # cd kernel # tar zxvf linux-2.6.16-chumby-1.0.tar.gz # cd linux-2.6.16 # ARCH=arm BOARD=mx21ads CROSS_COMPILE=arm-linux- make menuconfig (then immediately exit and save the config) # ARCH=arm BOARD=mx21ads CROSS_COMPILE=arm-linux- make
If all goes well, you should end up with a compressed kernel image at arch/arm/boot/zImage and all of loadable kernel modules under the drivers directory.
To find all of the drivers, run:
# find drivers -name *.ko
Which should return:
drivers/media/video/cpia.ko drivers/media/video/compat_ioctl32.ko drivers/media/video/cpia_usb.ko drivers/media/video/v4l1-compat.ko drivers/media/video/v4l2-common.ko drivers/media/video/videodev.ko drivers/bluetooth/hci_usb.ko drivers/bluetooth/hci_vhci.ko drivers/video/console/bitblit.ko drivers/video/console/fbcon.ko drivers/video/console/fbcon_ccw.ko drivers/video/console/fbcon_cw.ko drivers/video/console/fbcon_rotate.ko drivers/video/console/fbcon_ud.ko drivers/video/console/font.ko drivers/video/console/softcursor.ko drivers/char/chumby_accel.ko drivers/char/chumby_sense1.ko drivers/char/chumby_timer.ko drivers/usb/media/dsbr100.ko drivers/usb/net/asix.ko drivers/usb/net/cdc_ether.ko drivers/usb/net/pegasus.ko drivers/usb/net/usbnet.ko drivers/usb/input/usbhid.ko drivers/mfd/chumby-tsc2100.ko