S3C6410下移植NAND驅動

NAND Flash ECC校驗的原理

http://blog.ednchina.com/lIEal/17736/message.ASPx 驅動設置好以後，進行參數配置。
比較了一下2.6.24和2.6.29內核以後，發現2.6.29內核中6410（其他類似）中的所有platform_device都定義在了 /arch/arm/mach-s3c6410/mach-smdk6410.c 以及 /arch/arm/plat-s3c64xx/dev-xxx.c(比如：dev-fb.c)中。 因此，在Mach-smdk6410.c中添加注冊信息： * NAND分區
* 一共分為4個區，其中第3個分區存放android的文件系統

* 第4個分區存放android文件系統data文件夾的內容
* 因此在UBOOT的參數設置為root=/dev/mtdblock2 struct mtd_partition s3c_partition_info[] = { .name        = "Bootloader",
.offset        = 0,
.size        = (256*SZ_1K),
.mask_flags    = MTD_CAP_NANDFlash, {
.name        = "Kernel",
.offset        = (256*SZ_1K),    /* Block number is 0x10 */
.size        = (5*SZ_1M) - (256*SZ_1K),
// .mask_flags    = MTD_CAP_NANDFlash,        //- chachi {
.name        = "File System",
.offset        = (5*SZ_1M),    /* Block number is 0x10 */
.size        = (90*SZ_1M),            //gzy
// .mask_flags    = MTD_CAP_NANDFlash,    //- chachi {
.name        = "Data",
.offset        = MTDPART_OFS_APPEND,
.size        = MTDPART_SIZ_FULL, }; struct s3c_nand_mtd_info s3c_nand_mtd_part_info = {
.chip_nr = 1,
.mtd_part_nr = ARRAY_SIZE(s3c_partition_info),
.partition = s3c_partition_info,
}; static struct resource s3c_nand_resource[] = {
[0] = {
.start = S3C24XX_PA_NAND,
.end   = S3C24XX_PA_NAND + S3C24XX_SZ_NAND - 1,
.flags = IORESOURCE_MEM, }; struct platform_device s3c_device_nand = {
.name        = "s3c-nand",
.id        = -1,
.num_resources    = ARRAY_SIZE(s3c_nand_resource),
.resource    = s3c_nand_resource,
.dev = {
.platform_data = &s3c_nand_mtd_part_info };
/* end change by chachi */ static struct platform_device *smdk6410_devices[] __initdata = { &s3c_device_nand, //+ chachi };NAND的PHY地址定義為：
#define S3C24XX_PA_NAND (0x70200000)
#define S3C24XX_SZ_NAND SZ_1M 最後配置menuconfig（我更喜歡用xconfig ^_^）：
<*> Memory Technology Device (MTD) support ---> 
[*]   MTD partitioning support
<*>   RedBoot partition table parsing                            │ │ 
│ │    (-1)    Location of RedBoot partition table                      │ │ 
│ │    [*]     Include unallocated Flash regions                        │ │ 
│ │    [ ]     Force read-only for RedBoot system images                │ │ 
│ │    [*]   Command line partition table parsing                       │ 
<*>   Direct char device Access to MTD devices                   │ │ 
│ │    -*-   Common interface to block layer for MTD 'translation layers│ │ 
│ │    <*>   Caching block device Access to MTD devices   │ │          RAM/ROM/Flash chip drivers ---> 
<*> Detect flash chips by Common Flash Interface (CFI) probe     │ │ 
│ │    <*> Detect non-CFI AMD/JEDEC-compatible Flash chips              │ │ 
│ │    [ ] Flash chip driver advanced configuration options             │ │ 
│ │    <*> Support for Intel/Sharp Flash chips                          │ │ 
│ │    <*> Support for AMD/Fujitsu/Spansion Flash chips                 │ │ 
│ │    < > Support for ST (Advanced Architecture) Flash chips           │ │ 
│ │    < > Support for RAM chips in bus mapping                         │ │ 
│ │    <*> Support for ROM chips in bus mapping                         │ │ 
│ │    < > Support for absent chips in bus mapping                      │ │ │ └────────────────────────────────────────────────── <*>   NAND Device Support ---> 
--- NAND Device Support                                          │ │ 
│ │    [*]   Verify NAND page writes                                    │ │ 
│ │    [ ]   NAND ECC Smart Media byte order                            │ │ 
│ │    [ ]   Enable chip ids for obsolete ancIEnt NAND devices          │ │ 
│ │    < >   GPIO NAND Flash driver                                     │ │ 
│ │    <*>   NAND Flash support for S3C SoC                             │ │ 
│ │    [ ]     S3C NAND driver debug                                    │ │ 
│ │    [*]     S3C MTD NO ECC warning                                   │ │ 
│ │    [ ]     S3C NAND Hardware ECC                                    │ │ 
│ │    [*]     Large (2K) page nand Support Enable                      │ │ │ │    < >   Support for generic platform NAND driver                   │ │ 
│ └───────────────────────────────────────────────────────────────

在uboot中配置bootargs參數:

root=/dev/mtdblock2 rootfstype=jffs2

啟動內核後顯示：

S3C NAND Driver, (c) 2007 Samsung Electronics

<6>NAND device: Manufacturer ID: 0xec, Chip ID: 0xf1 (Samsung NAND 128MiB 3,3V 8-bit)

<4>NAND_ECC_NONE selected by board driver. This is not recommended !!

<5>Creating 4 MTD partitions on "NAND 128MiB 3,3V 8-bit":

<5>0x000000000000-0x000000040000 : "Bootloader"

<5>0x000000040000-0x000000500000 : "Kernel"

<5>0x000000500000-0x000005f00000 : "File System"

<5>0x000005f00000-0x000008000000 : "data"

install NAND DRIVE = 0

......

VFS: Mounted root (jffs2 filesystem) on device 31:2.

<6>Freeing init memory: 88K

<4>Warning: unable to open an initial console.

<0>Kernel panic - not syncing: Attempted to kill init!

表示NAND驅動移植成功

JFFS2文件系統等，在之後的文章中寫