00003-----移植nandflash驱动并更改分区信息

LINUX2.6.32.2已经自带了大部分NANDFLASH的驱动，在linux2.6.32.2/drivers/mtd/nand/nand_ids.c文件中。

1.本人开发板上的NANDFLASH型号为：K9F2G08U0B,如果在网络中搜索它的DATASHEET可以搜索K9F2G08X0B.

 

2.在DATASHEET中查找此芯片的ID号位 0XDA

3.在linux2.6.32.2/drivers/mtd/nand/nand_ids.c寻找是否已经支持了此型号nandflash，经过查找发现，目前的LINUX内核已经支持了此型号nandflash,下图就是在此文件中找到的相关代码。

 

     通过上图可发现NAND 256Mib 3.3v 8-bit 就是适合本人开发板NANDFLASH的相关程序

4.修改nandflash分区表

   修改LINUX内核下的arch/arm/s3c2440/mach-mini2440.c文件添加如下代码

 

 

以上代表五个分区，其中最后一个实际上市涵盖了整个NANDFLASH。其他四个分区作用如下：

    （1）boot区，用来存放U-boot或者SUPERVIVI等启动代码

     （2）启动代码参数区，也可以用来弥补由于某些启动代码过大而造成存储启动代码的区域空间不够用的缺陷，这样不会使U-BOOT代码存储到LINUX内核代码区域

      （3）存放内核代码

      （4）文件系统分区

5.将nandflash设备注册到系统中

6.按照友善之臂的说法到此就可以结束了，就可以make zImage了，谁知道我一make 报出来了许多错误，最后通过网络论坛的查询，需要给mach-mini2440.c文件添加几个头文件，本人图省事就找MINI2440内核源码，然后从里面将所有的头文件都COPY过来了。如果暂时用不到某

个头文件也无所谓的呵呵。需要添加的头文件如下：

 #include  
#include  
#include  
#include  
#include 

7.这个时候编译可以成功了，下载到开发板中厚，从超级终端得到的信息是并没有发现nandflash，不行啊，只能继续查网络得到如下结论，还是需要对mach-mini2440.c文件进行修改，将指定函数改为如下代码：

 

 static void __init mini2440_machine_init(void)
{
  s3c_i2c0_set_platdata(NULL);
 s3c_device_nand.dev.platform_data = &mini2440_nand_info; 
 platform_add_devices(mini2440_devices, ARRAY_SIZE(mini2440_devices));
 //smdk_machine_init();
}

8.保存退出

9.make distclean

10.make mini2440_defconfig

11.make zImage

12.将文件通过DNW下载后，将norflash启动更改为nandflash启动，重新上电后，就可以在超级终端发现如下信息，证明nandflash移植成功

load Image of Linux...Uncompressing Linux................................................................................................................................. done, booting the kernel.

Linux version 2.6.32.2 (root@xubin-desktop) (gcc version 4.2.3 (Sourcery G++ Lite 2008q1-126)) #1 Thu Apr 5 11:27:45 CST 2012

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177

CPU: VIVT data cache, VIVT instruction cache

Machine: FriendlyARM Mini2440 development board

ATAG_INITRD is deprecated; please update your bootloader.

Memory policy: ECC disabled, Data cache writeback

CPU S3C2440A (id 0x32440001)

S3C24XX Clocks, (c) 2004 Simtec Electronics

S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz

CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256

Kernel command line: noinitrd root=/dev/mtdblock3 init=/linuxrc console=ttySAC0

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 60596KB available (3584K code, 417K data, 132K init, 0K highmem)

SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

Hierarchical RCU implementation.

NR_IRQS:85

irq: clearing subpending status 00000002

Console: colour dummy device 80x30

console [ttySAC0] enabled

Calibrating delay loop... 201.93 BogoMIPS (lpj=504832)

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

NET: Registered protocol family 16

S3C2440: Initialising architecture

S3C2440: IRQ Support

S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics

DMA channel 0 at c4808000, irq 33

DMA channel 1 at c4808040, irq 34

DMA channel 2 at c4808080, irq 35

DMA channel 3 at c48080c0, irq 36

S3C244X: Clock Support, DVS off

bio: create slab at 0

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

s3c-i2c s3c2440-i2c: slave address 0x10

s3c-i2c s3c2440-i2c: bus frequency set to 98 KHz

s3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapter

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NET: Registered protocol family 1

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.

ROMFS MTD (C) 2007 Red Hat, Inc.

msgmni has been set to 118

alg: No test for stdrng (krng)

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler deadline registered

io scheduler cfq registered

s3c2410-lcd s3c2410-lcd: no platform data for lcd, cannot attach

s3c2410-lcd: probe of s3c2410-lcd failed with error -22

s3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440

s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440

s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440

brd: module loaded

S3C24XX NAND Driver, (c) 2004 Simtec Electronics

s3c24xx-nand s3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns

s3c24xx-nand s3c2440-nand: NAND soft ECC

NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-bit)

Scanning device for bad blocks

Bad eraseblock 807 at 0x0000064e0000

Bad eraseblock 893 at 0x000006fa0000

Bad eraseblock 2020 at 0x00000fc80000

Creating 5 MTD partitions on "NAND 256MiB 3,3V 8-bit":

0x000000000000-0x000000040000 : "boot"

0x000000040000-0x000000060000 : "param"

ftl_cs: FTL header not found.

0x000000060000-0x000000560000 : "Kernel"

uncorrectable error : 

0x000000560000-0x000040560000 : "root"

mtd: partition "root" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0xfaa0000

ftl_cs: FTL header not found.

0x000000000000-0x000040000000 : "nand"

mtd: partition "nand" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0x10000000

dm9000 Ethernet Driver, V1.31

ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

usbcore: registered new interface driver libusual

mice: PS/2 mouse device common for all mice

S3C24XX RTC, (c) 2004,2006 Simtec Electronics

i2c /dev entries driver

S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics

s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled

cpuidle: using governor ladder

sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

usbcore: registered new interface driver hiddev

usbcore: registered new interface driver usbhid

usbhid: v2.6:USB HID core driver

Advanced Linux Sound Architecture Driver Version 1.0.21.

No device for DAI UDA134X

No device for DAI s3c24xx-i2s

ALSA device list:

  No soundcards found.

TCP cubic registered

NET: Registered protocol family 17

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

List of all partitions:

1f00             256 mtdblock0 (driver?)

1f01             128 mtdblock1 (driver?)

1f02            5120 mtdblock2 (driver?)

1f03          256640 mtdblock3 (driver?)

1f04          262144 mtdblock4 (driver?)

No filesystem could mount root, tried:  ext3 cramfs vfat msdos romfs

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3)

[] (unwind_backtrace+0x0/0xe0) from [] (panic+0x40/0x120)

[] (panic+0x40/0x120) from [] (mount_block_root+0x1c4/0x204)

[] (mount_block_root+0x1c4/0x204) from [] (prepare_namespace+0x160/0x1b8)

[] (prepare_namespace+0x160/0x1b8) from [] (kernel_init+0xd4/0x108)

[] (kernel_init+0xd4/0x108) from [] (kernel_thread_exit+0x0/0x8)

 

 

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