u-boot2016.05 有关 4096page size , oob == 224 nand 的移植支持

• 大致介绍一下这个 nand 的基础属性

    pagesize == 4096 byte
    oob == 224 byte
    block size == 256 Kbyte

• u-boot configs/xxx.h 里面配置如下参数：

    272 #define CONFIG_SYS_NAND_PAGE_SIZE   4096
    273 #define CONFIG_SYS_NAND_OOBSIZE     224
    274 #define CONFIG_SYS_NAND_BLOCK_SIZE  (256*1024)
    275 #define CONFIG_NAND_OMAP_ECCSCHEME      OMAP_ECC_BCH16_CODE_HW
    276 #define CONFIG_SYS_NAND_BAD_BLOCK_POS   NAND_LARGE_BADBLOCK_POS
    277 #define CONFIG_SYS_NAND_ECCPOS  { 2, 3, 4, 5, 6, 7, 8, 9, \
    278                   10, 11, 12, 13, 14, 15, 16, 17, 18, 19, \
    279                   20, 21, 22, 23, 24, 25, 26, 27, 28, 29, \
    280                   30, 31, 32, 33, 34, 35, 36, 37, 38, 39, \
    281                   40, 41, 42, 43, 44, 45, 46, 47, 48, 49, \
    282                   50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
    283                   60, 61, 62, 63, 64, 65, 66, 67, 68, 69, \
    284                   70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
    285                   80, 81, 82, 83, 84, 85, 86, 87, 88, 89, \
    286                   90, 91, 92, 93, 94, 95, 96, 97, 98, 99, \
    287                   100, 101, 102, 103, 104, 105, 106, 107, 108, \
    288                   109, 110, 111, 112, 113, 114, 115, 116, 117, \
    289                   118, 119, 120, 121, 122, 123, 124, 125, 126, \
    290                   127, 128, 129, 130, 131, 132, 133, 134, 135, \
    291                   136, 137, 138, 139, 140, 141, 142, 143, 144, \
    292                   145, 146, 147, 148, 149, 150, 151, 152, 153, \
    293                   154, 155, 156, 157, 158, 159, 160, 161, 162, \
    294                   163, 164, 165, 166, 167, 168, 169, 170, 171, \
    295                   172, 173, 174, 175, 176, 177, 178, 179, 180, \
    296                   181, 182, 183, 184, 185, 186, 187, 188, 189, \
    297                   190, 191, 192, 193, 194, 195, 196, 197, 198, \
    298                   199, 200, 201, 202, 203, 204, 205, 206, 207, \
    299                   208, 209, \
    300                 }
    301
    302 #define CONFIG_SYS_NAND_ECCSIZE     512
    303 #define CONFIG_SYS_NAND_ECCBYTES    26

     83     "nandroot=ubi0:rootfs rw ubi.mtd=4,4096\0" \
     84     "nandrootfstype=ubifs rootwait=1\0" \
     85     "nandboot=echo Booting from nand ...; " \
     86         "run nandargs; " \
     87         "nandecc hw 16; "\
     88         "setenv loadaddr 0x82000000; " \
     89         "setenv fdtaddr 0x88000000; "\
     90         "nandecc hw 16; "\
     91         "nand read ${loadaddr} 0x240000 0x480000; "\
     92         "nandecc hw 16; "\
     93         "nand read ${fdtaddr} 0x6C0000 0x80000; "\
     94         "bootz ${loadaddr} - ${fdtaddr} ;\0"

• 上面的参数配置就是有关 nand 224,4096,256的配置

• 在烧写的时候，也要 nand hw 16, 在 omap_gpmc.c 里面还要添加

    935         } else if (eccstrength == 8) {
    936             err = omap_select_ecc_scheme(nand,
    937                     OMAP_ECC_BCH8_CODE_HW,
    938                     mtd->writesize, mtd->oobsize);
    939         } else if (eccstrength == 16) {
    940             err = omap_select_ecc_scheme(nand,
    941                     OMAP_ECC_BCH16_CODE_HW,
    942                     mtd->writesize, mtd->oobsize);
    943             printf("hw 16 writesize : %d   oobsize :%d\n", mtd->writesize, mtd->oobsize);