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am335x的nandflash移植

大家好,我将am335x-evm板的flash改为(–Page size x8: 4320 bytes (4096 + 224 bytes)),请问uboot需要修改那些地方?

我之前修改了am335x_evm.h后。

在uboot显示如下结果

=> mtdpart

default nand0: partition (NAND.SPL) size alignment incorrect

  • 从报错信息看,可能是NAND partition layout和新的nand flash的block size不一致,不仅仅partition offsets还有partition size也要是block size的倍数. 请检查am335x_evm.h文件的mtdparts配置。
  • 你好,请问am335x_evm.h文件中mtdparts配置是指哪里?

    我查看了文件仅有:

    #ifdef CONFIG_NAND

    #define NANDARGS \

    "mtdids=" CONFIG_MTDIDS_DEFAULT "\0" \

    "mtdparts=" CONFIG_MTDPARTS_DEFAULT "\0" \

    "nandargs=setenv bootargs console=${console} " \

    "${optargs} " \

    "root=${nandroot} " \

    "rootfstype=${nandrootfstype}\0" \

    "nandroot=ubi0:rootfs rw ubi.mtd=NAND.file-system,2048\0" \

    "nandrootfstype=ubifs rootwait=1\0" \

    "nandboot=echo Booting from nand ...; " \

    "run nandargs; " \

    "nand read ${fdtaddr} NAND.u-boot-spl-os; " \

    "nand read ${loadaddr} NAND.kernel; " \

    "bootz ${loadaddr} - ${fdtaddr}\0"

    #else

    #define NANDARGS ""

    #endif

    这一处提到了mdtparts,里面涉及的CONFIG_MTDPARTS_DEFAULT 在am335x_evm_deconfig中出现:

    CONFIG_MTDPARTS_DEFAULT="mtdparts=nand.0:128k(NAND.SPL),128k(NAND.SPL.backup1),128k(NAND.SPL.backup2),128k(NAND.SPL.backup3),256k(NAND.u-boot-spl-os),1m(NAND.u-boot),128k(NAND.u-boot-env),128k(NAND.u-boot-env.backup1),8m(NAND.kernel),-(NAND.file-system)"

    这里面有需要修改的参数?另外附上我之前修改的am335x_evm.h的部分:

    #ifdef CONFIG_NAND

    /* NAND: device related configs */

    #define CONFIG_SYS_NAND_5_ADDR_CYCLE

    #define CONFIG_SYS_NAND_PAGE_COUNT (CONFIG_SYS_NAND_BLOCK_SIZE / \

    CONFIG_SYS_NAND_PAGE_SIZE)

    #define CONFIG_SYS_NAND_PAGE_SIZE 4096

    #define CONFIG_SYS_NAND_OOBSIZE 224/*64*/

    #define CONFIG_SYS_NAND_BLOCK_SIZE (128*2048)/*128*1024*/

    /* NAND: driver related configs */

    #define CONFIG_SYS_NAND_BAD_BLOCK_POS NAND_LARGE_BADBLOCK_POS

    #define CONFIG_SYS_NAND_ECCPOS { 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \

    16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, \

    28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, \

    40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, \

    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \

    64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, \

    76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, \

    88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, \

    100, 101, 102, 103, 104, 105, 106, 107, 108, 109, \

    110, 111, 112, 113}

    #define CONFIG_SYS_NAND_ECCSIZE 512

    #define CONFIG_SYS_NAND_ECCBYTES 14

    #define CONFIG_SYS_NAND_ONFI_DETECTION

    #define CONFIG_NAND_OMAP_ECCSCHEME OMAP_ECC_BCH8_CODE_HW

    #define CONFIG_SYS_NAND_U_BOOT_OFFS 0x00100000/*0x000c0000*/

    /* NAND: SPL related configs */

    #ifdef CONFIG_SPL_OS_BOOT

    #define CONFIG_SYS_NAND_SPL_KERNEL_OFFS 0x00200000 /* kernel offset */

    #endif

    #endif /* !CONFIG_NAND */

  • 是这里,您用的flash block size还是128K吗?如果不是128k,CONFIG_MTDPARTS_DEFAULT里面的参数要修改。
  • 我所使用的的是256K的,CONFIG_MTDPARTS_DEFAULT里面的参数是表示分区,请问这要如何修改啊?

  • 下面改成256k试试。
    CONFIG_MTDPARTS_DEFAULT="mtdparts=nand.0:128k(NAND.SPL),128k(NAND.SPL.backup1),128k(NAND.SPL.backup2),128k(NAND.SPL.backup3),256k(NAND.u-boot-spl-os),1m(NAND.u-boot),128k(NAND.u-boot-env),128k(NAND.u-boot-env.backup1),8m(NAND.kernel),-(NAND.file-system)"
  • 我将里面的128k均修改为256k后,mdtpart命令能够使用了。

    device nand0 <nand.0>, # parts = 10
     #: name                size            offset          mask_flags
     0: NAND.SPL            0x00040000      0x00000000      0
     1: NAND.SPL.backup1    0x00040000      0x00040000      0
     2: NAND.SPL.backup2    0x00040000      0x00080000      0
     3: NAND.SPL.backup3    0x00040000      0x000c0000      0
     4: NAND.u-boot-spl-os  0x00040000      0x00100000      0
     5: NAND.u-boot         0x00100000      0x00140000      0
     6: NAND.u-boot-env     0x00040000      0x00240000      0
     7: NAND.u-boot-env.backup10x00040000   0x00280000      0
     8: NAND.kernel         0x00800000      0x002c0000      0
     9: NAND.file-system    0x3f540000      0x00ac0000      0
    active partition: nand0,0 - (NAND.SPL) 0x00040000 @ 0x00000000
    defaults:
    mtdids  : nand0=nand.0
    mtdparts: mtdparts=nand.0:256k(NAND.SPL),256k(NAND.SPL.backup1),256k(NAND.SPL.backup2),256k(NAND.SPL.backup3),256k(NAND.u-boot-spl-os),1m(NAND.u-boot),256k(NAND.u-boot-env),256k(NAND.u-boot-env.backup1),8m(NAND.kernel),-(NAND.file-system)

    但这里的这些分区是否能够进行合并,分区的大小依据是什么

    另外,我进行nand write操作时,系统提示EEC错误

    NAND erase: device 0 offset 0x100000, size 0x180000
    Erasing at 0x240000 -- 100% complete.
    OK
    => nand write 0x82000000 0x1000000 1x180000

    NAND write: '1x180000' is not a number
    => nand write 0x82000000 0x1000000 0x180000

    NAND write: device 0 offset 0x1000000, size 0x180000
    omap-elm: uncorrectable ECC errors
    omap-elm: uncorrectable ECC errors
    NAND write to offset 1000000 failed -5
     0 bytes written: ERROR

    我前面有修改NAND_ECCPOS、ECCSIZE、ECCBYTES的大小,请问这ECC错误应该如何解决?

  • 2k page size变成4k page size, ECC机制也要修改,请参考下面的帖子。
    e2echina.ti.com/.../149594