一、环境
1、开发板
Tiny6410 NAND: 2G RAM: 256M MLC
2、操作系统
Ubuntu10
3、交叉工具编译链
arm-linux-gcc-4.5.1
二、下载内核源码包
linux-2.6.38
三、解压内核
tar –jxvf linux-2.6.38.tar.bz2
我解压的的路径是：
四、NAND FLASH移植
1、修改Makefile
vim Makefile
将约191行改为：
ARCH ? = arm
CROSS_COMPILE ? = arm-linux-
2、cp arch/arm/configs/s3c6400_defconfig .config
忽略这一步的话，后面会找不到System Type
3、make menuconfig
4、添加交叉工具编译链的目录
General setup --->
(/opt/FriendlyARM/toolschain/4.5.1/bin/arm-linux-) Cross-compiler too
System Type --->
[*] MINI6410 （其余的可以去掉）
这样编译出来的内核是可以被uboot引导的，然后是增加nand flash支持
vi arch/arm/mach-s3c64xx/mach-mini6410.c
第117行
struct mtd_partition mini6410_nand_part[] = {
{
.name = "Bootloader",
.offset = 0,
.size = (4 * 128 *SZ_1K),
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "Kernel",
.offset = (4 * 128 *SZ_1K),
.size = (5*SZ_1M) ,
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "File System",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
}; //update at 2011-8-26 经过测试发现，这里改完后根本不起作用，甚至将整个注释也无妨，估计分区已经固死在后面的s3c_nand_mlc.fo中
拷贝友善光盘的NDND FLASH 驱动
drivers/mtd/nand/s3c_nand.c
arch/arm/plat-samsung/include/plat/regs-nand.h
drivers/mtd/nand/s3c_nand_mlc.fo
然后修改drivers/mtd/nand/Kconfig和drivers/mtd/nand/Makefile文件
在drivers/mtd/nand/Kconfig 238行增加（注意：进格要用Tab键）
config MTD_NAND_S3C
tristate "NAND Flash support for S3C SoC"
depends on (ARCH_S3C64XX || ARCH_S5P64XX || ARCH_S5PC1XX) && MTD_NAND
help
This enables the NAND flash controller on the S3C.
No board specfic support is done by this driver, each board
must advertise a platform_device for the driver to attach.
config MTD_NAND_S3C_DEBUG
bool "S3C NAND driver debug"
depends on MTD_NAND_S3C
help
Enable debugging of the S3C NAND driver
configMTD_NAND_S3C_HWECC
bool "S3C NAND Hardware ECC"
depends on MTD_NAND_S3C
help
Enable the use of the S3C's internal ECC generator when
using NAND. Early versions of the chip have had problems with
incorrect ECC generation, and if using these, the default of
software ECC is preferable.
If you lay down a device with the hardware ECC, then you will
currently not be able to switch to software, as there is no
implementation for ECC method used by the S3C
drivers/mtd/nand/Makefile中20行增加
obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand.o
末尾再增加
S3C_NAND_MLC_SRC = $(shell ls drivers/mtd/nand/s3c_nand_mlc.c 2>/dev/null)
ifeq ($(S3C_NAND_MLC_SRC),)
obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand_mlc.fo
else
obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand_mlc.o
endif
然后再make menuconfig
Device Drivers--->
<*> Memory Technology Device (MTD) support --->
[*] MTD partitioning support
[*] Command line partition table parsing
<*> Direct char device access to MTD devices
<*> Caching block device access to MTD devices
<*> NAND Device Support --->
< > NAND Flash support for Samsung S3C SoCs 去掉不要选
<*> NAND Flash support for S3C SoC
[*] S3C NAND Hardware ECC
make zImage
五、内核添加UBIFS
1、配置内核支持UBIFS
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
<*> Enable UBI - Unsorted block images --->
2、配置MTD支持UBI接口
File systems --->
[*] Miscellaneous filesystems --->
<*> UBIFS file system support
3、make
4、下载测试
只要出现正常内核分区就说明nand 驱动可以用了。