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);
