原创 u-boot-2010.03在tq6410上的移植详解（七）

int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,

                    u_char *buffer)

{

      int rval;

      size_t left_to_write = *length;

      size_t len_incl_bad;

      u_char *p_buffer = buffer;

      #if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

             if(nand->rw_oob==1)

             {

             size_t oobsize=nand->oobsize;

             size_t datasize = nand->writesize;

             int datapages = 0;

             if(((*length)%(nand->oobsize+nand->writesize))!=0)

             {

                    printf("Attempt to write error lenght data!\n");

                    return -EINVAL;

             }

             datapages = *length/(datasize+oobsize);

             *length = datapages*datasize;

             left_to_write = *length;

             }

      #endif

     ........

      len_incl_bad = get_len_incl_bad (nand, offset, *length);

      if ((offset + len_incl_bad) > nand->size) {

             printf ("Attempt to write outside the flash area\n");

             return -EINVAL;

      }

      #if !defined(CONFIG_SYS_NAND_YAFFS_WRITE)

      if (len_incl_bad == *length) {

             rval = nand_write (nand, offset, length, buffer);

             if (rval != 0)

                    printf ("NAND write to offset %llx failed %d\n",

                           offset, rval);

             return rval;

      }

      #endif

      while (left_to_write > 0) {

             size_t block_offset = offset & (nand->erasesize - 1);

             size_t write_size;

             WATCHDOG_RESET ();

             if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {

                    printf ("Skip bad block 0x%08llx\n",

                           offset & ~(nand->erasesize - 1));

                    offset += nand->erasesize - block_offset;

                    continue;

             }

             #if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

             if (nand->skipfirstblk==1)

             {

                    nand->skipfirstblk = 0;

                    printf("Skip the first good block%llx\n",offset&~(nand->erasesize-1));

                    offset+=nand->erasesize-block_offset;

                    continue;

             }           

             #endif

....

             left_to_write -= write_size;

             printf("%d%% is complete",100-(left_to_write/(*length/100)));

             offset        += write_size;

//           p_buffer      += write_size;

             #if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

             if(nand->rw_oob==1)

             {

             p_buffer+=write_size+(write_size/nand->writesize*nand->oobsize);

             }           

             else

             {

             p_buffer+=write_size;

             }

             #else

             p_buffer      += write_size;

             #endif

      }

      return 0;

}

在131行添加红色字体部分

#if defined(CONFIG_SYS_NAND_YAFFS_WRITE)

      u_char rw_oob;

      u_char skipfirstblk;     

      #endif