u-boot-2010.03在tq6410上的移植详解（六）

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3 ）drivers/mtd/nand/nand_base.c

在 2095 行处红色字体为修改部分：

static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,

size_t *retlen, const uint8_t *buf)

{

struct nand_chip *chip = mtd->priv;

int ret;

#if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

int oldopsmode = 0;

if(mtd->rw_oob==1)

{

size_t oobsize =mtd->oobsize;

size_t datasize = mtd->writesize;

int i=0;

uint8_t oobtemp[oobsize];

int datapages = 0;

datapages = len/(datasize);

for(i=0;i<(datapages);i++)

{

memcpy((void *)oobtemp,(void *)(buf+datasize*(i+1)),oobsize);

memmove((void *)(buf+datasize*(i+1)),(void *)(buf+datasize*(i+1)+oobsize),(datapages-(i+1))*(datasize)+(datapages-1)*oobsize);

memcpy((void *)(buf+(datapages)*(datasize+oobsize)-oobsize),(void *)(oobtemp),oobsize);

}

}

#endif

/* Do not allow reads past end of device */

if ((to + len) > mtd->size)

return -EINVAL;

if (!len)

return 0;

nand_get_device(chip, mtd, FL_WRITING);

chip->ops.len = len;

chip->ops.datbuf = (uint8_t *)buf;

#if !defined(CONFIG_SYS_NAND_YAFFS_WRITE)

chip->ops.oobbuf = NULL;

#endif

#if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

if(mtd->rw_oob!=1)

{

chip->ops.oobbuf = NULL;

}

else

{

chip->ops.oobbuf = (uint8_t*)(buf+len);

chip->ops.ooblen = mtd->oobsize;

oldopsmode = chip->ops.mode;

chip->ops.mode = MTD_OOB_RAW;

}

#endif

ret = nand_do_write_ops(mtd, to, &chip->ops);

*retlen = chip->ops.retlen;

nand_release_device(mtd);

#if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

chip->ops.mode = oldopsmode;

#endif

return ret;

}