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);