Difference between revisions of "Didj Explorer Kernel"

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For MMC Card configuration see [[Didj_and_Explorer_MMC_Patch]]
For MMC Card configuration see [[Didj_and_Explorer_MMC_Patch]]

Revision as of 15:10, 13 April 2011

This is a work in progress Explains what to change in order to build the 2.6.31 LF Explorer kernel for Didj. Use your DJHI to boot the zImage from uSD.

1. make lf1000_ts_defconfig

2. edit .config. (we are enabling jffs2 and giving the right bootargs):

CONFIG_CMDLINE="mem=18M mlc_fb=0x01200000,0x01200000 init=/sbin/init console=ttyS0,115200 root=31:06 ro rootflags=noatime rootfstype=jffs2 ubi.mtd=Brio ubi.mtd=prg_Brio ubi.mtd=Cartridge"


3. edit line 184 of linux2.6/Makefile to point to your cross compiler (or comment it out if you know the varaible is set elsewhere).

4. edit include/asm/mach-types.h (the number has changed to 2028 - but the boot loader only knows about 1235)

(you may need to 'make' once and ctrl-c to get the mach-types file generated the first time.)

//define MACH_TYPE_ZIR2412 1235

define MACH_TYPE_DIDJ 1235


//define MACH_TYPE_DIDJ 2028

4.1 instead of editig mach-types.h you can edit the file that it is generated from, mach-types (no.h!) in /linux-2.6/arch/arm/tools, edit the file and look for 2028, copy everything on the line upto 2028:


comment out the 2028 line and now search for 1235 and replace the line with the above, make sure you add 1235 to the end:

didj MACH_DIDJ DIDJ 1235

This allows you to do 'make clean' without having to re-edit mach-types.h each time, if you also own an explorer you might not want to do this.

5. edit drivers/mtd/nand/lf1000.c (using didj's 9 partition scheme)

Unified diff 0f changes to drivers/mtd/nand/lf1000.c

Alternate site: Unified Diff of changes to drivers/mtd/nand/lf1000.c

6. Edit arch\arm\mach-lf1000\include\mach\mlc.h

  1. define MLC_MAJOR 251
  2. define MLC_LAYER_MAJOR 250

This will enable the mlc driver to work with /dev/mlc

7. make

zImage is found in arch/arm/boot

To mount /Didj:

mount -t vfat -o async,noatime /dev/mtdblock9 /Didj

For framebuffer configuration see Leapster_Explorer_Framebuffer_Driver

For MMC Card configuration see Didj_and_Explorer_MMC_Patch