環(huán)境 VirtualBox+ubuntu 10.04
編譯器，友善自帶arm-linux-gcc-4.5.1-v6-vfp-20101103.tgz
硬件，tiny6410，核心板號1107

1、下載linux-2.6.38的源碼，ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.38.tar.bz2
2、解壓 tar xvfj /mnt/ubuntu/linux-2.6.38.tar.bz2 -C .
3、vi Makefile       191行改為    ARCH            ?= arm
4、cp arch/arm/configs/s3c6400_defconfig .config
5、make menuconfig
5、General setup->(/usr/4.5.1/bin/arm-linux-) Cross-compiler tool prefix    我將編譯器解壓到了/usr/4.5.1目錄
       System Type->[*] MINI6410   選上，其他的可以去掉，不確定的可以參考友善之臂的

這樣編譯出來的內(nèi)核是可以被uboot引導的，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 經(jīng)過測試發(fā)現(xiàn)，這里改完后根本不起作用，甚至將整個注釋也無妨，估計分區(qū)已經(jīng)固死在后面的s3c_nand_mlc.fo中

drivers/mtd/nand/s3c_nand.c和arch/arm/plat-samsung/include/plat/regs-nand.h兩個文件可以從友善的源碼中
拷貝過來，這是他們自己寫的，當然drivers/mtd/nand/s3c_nand_mlc.fo也要拷貝過來，這是友善沒有開源的一個驅(qū)動之一，
所以不用研究了，拷過來就是了。

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修改drivers/mtd/nand/nand_base.c文件

修改方法如下，“-”就是要去掉的內(nèi)容，“+”就是要增加的內(nèi)容，@@后面的是行號，
嫌麻煩的的直接將drivers/mtd/nand/nand_base.c拷過來覆蓋掉

嘿嘿，下面是我diff出來的東西。


@@ -342,7 +342,7 @@
  */
static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
{
-    int page, chipnr, res = 0;
+    int page, res = 0;
     struct nand_chip *chip = mtd->priv;
     u16 bad;

@@ -351,6 +351,8 @@

     page = (int)(ofs >> chip->page_shift) & chip->pagemask;

+#if 0
+    /* Moved to nand_block_checkbad() for chip specify support */
     if (getchip) {
         chipnr = (int)(ofs >> chip->chip_shift);

@@ -359,6 +361,7 @@
         /* Select the NAND device */
         chip->select_chip(mtd, chipnr);
     }
+#endif

     if (chip->options & NAND_BUSWIDTH_16) {
         chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE,
@@ -378,8 +381,10 @@
     else
         res = hweight8(bad) < chip->badblockbits;

+#if 0
     if (getchip)
         nand_release_device(mtd);
+#endif

     return res;
}
@@ -477,9 +482,26 @@
                    int allowbbt)
{
     struct nand_chip *chip = mtd->priv;
+    int chipnr, res = 0;
+
+    /* Chip specify block_bad() support */
+    if (!chip->bbt) {
+        if (getchip) {
+            chipnr = (int)(ofs >> chip->chip_shift);

-    if (!chip->bbt)
-        return chip->block_bad(mtd, ofs, getchip);
+            nand_get_device(chip, mtd, FL_READING);
+
+            /* Select the NAND device */
+            chip->select_chip(mtd, chipnr);
+        }
+
+        res = chip->block_bad(mtd, ofs, getchip);
+
+        if (getchip)
+            nand_release_device(mtd);
+
+        return res;
+    }

     /* Return info from the table */
     return nand_isbad_bbt(mtd, ofs, allowbbt);
@@ -3002,23 +3024,15 @@
                 id_data[0] == NAND_MFR_SAMSUNG &&
                 (chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
                 id_data[5] != 0x00) {
+            int __oobsz[] = { 0, 128, 218, 400 };
             /* Calc pagesize */
             mtd->writesize = 2048 << (extid & 0x03);
             extid >>= 2;
             /* Calc oobsize */
-            switch (extid & 0x03) {
-            case 1:
-                mtd->oobsize = 128;
-                break;
-            case 2:
-                mtd->oobsize = 218;
-                break;
-            case 3:
-                mtd->oobsize = 400;
-                break;
-            default:
+            if (extid & 0x10) {
                 mtd->oobsize = 436;
-                break;
+            } else {
+                mtd->oobsize = __oobsz[(extid & 0x03)];
             }
             extid >>= 2;
             /* Calc blocksize */
@@ -3099,16 +3113,21 @@

     /* Calculate the address shift from the page size */
     chip->page_shift = ffs(mtd->writesize) - 1;
+
     /* Convert chipsize to number of pages per chip -1. */
-    chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
+    if (!chip->pagemask) {
+        chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
+    }

     chip->bbt_erase_shift = chip->phys_erase_shift =
         ffs(mtd->erasesize) - 1;
-    if (chip->chipsize & 0xffffffff)
-        chip->chip_shift = ffs((unsigned)chip->chipsize) - 1;
-    else {
-        chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32));
-        chip->chip_shift += 32 - 1;
+    if (!chip->chip_shift) {
+        if (chip->chipsize & 0xffffffff)
+            chip->chip_shift = ffs((unsigned)chip->chipsize) - 1;
+        else {
+            chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32));
+            chip->chip_shift += 32 - 1;
+        }
     }

     /* Set the bad block position */
@@ -3126,8 +3145,11 @@
      */
     if ((chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
             (*maf_id == NAND_MFR_SAMSUNG ||
-             *maf_id == NAND_MFR_HYNIX))
-        chip->options |= NAND_BBT_SCANLASTPAGE;
+             *maf_id == NAND_MFR_HYNIX)) {
+        if (mtd->writesize < 4096) {
+            chip->options |= NAND_BBT_SCANLASTPAGE;
+        }
+    }
     else if ((!(chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
                 (*maf_id == NAND_MFR_SAMSUNG ||
                  *maf_id == NAND_MFR_HYNIX ||
    
              
然后修改drivers/mtd/nand/Kconfig和drivers/mtd/nand/Makefile文件
在drivers/mtd/nand/Kconfig  238行增加
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