dm368 ecc 移植ubifs到dm368成功(4)

!(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) {

switch(chip->ecc.steps) {

case 2:

mtd->subpage_sft = 1;

break;

case 4:

case 8:

case 16:

mtd->subpage_sft = 2;

break;

}

}

chip->subpagesize = mtd->writesize >> mtd->subpage_sft;

可是我已经给options增加了NAND_NO_SUBPAGE_WRITE啊？有些怀疑，我就在此处加了打印log，果然是这里出了问题，

chip->options = 0x10101.

mtd->subpage_sft = 0.

chip->subpagesize = 512.

#define NAND_NO_SUBPAGE_WRITE 0x00000200

可是，这里的options 明明是不对的！那我设置的NAND_NO_SUBPAGE_WRITE在哪里丢掉了？

在下面的函数中有对chip->options赋值改变；

nand_get_flash_type()

printk(KERN_INFO"nand_get_flash_type 1, chip->options = 0x%x.\n",chip->options);

/*Get chip options, preserve non chip based options */

chip->options &= ~NAND_CHIPOPTIONS_MSK;

printk(KERN_INFO"nand_get_flash_type 2, chip->options = 0x%x.\n",chip->options);

chip->options|= type->options & NAND_CHIPOPTIONS_MSK;

printk(KERN_INFO"nand_get_flash_type 3, chip->options = 0x%x.\n",chip->options);

/*

* Set chip as a default. Board drivers canoverride it, if necessary

*/

chip->options|= NAND_NO_AUTOINCR;

/*Check if chip is a not a samsung device. Do not clear the

* options for chips which are not having anextended id.

*/

if(*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)

chip->options&= ~NAND_SAMSUNG_LP_OPTIONS;

printk(KERN_INFO"nand_get_flash_type 4, chip->options = 0x%x.\n",chip->options);

nand_get_flash_type 1,chip->options = 0x10200.

nand_get_flash_type 2,chip->options = 0x10000.

nand_get_flash_type 3,chip->options = 0x1011c.

nand_get_flash_type 4,chip->options = 0x10101.

问题出在这里，红色的代码！

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