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mtd: denali: Add multi connected NAND support 

Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Chuanxiao Dong 2010-08-06 18:19:09 +08:00 committed by David Woodhouse
parent db9a321049
commit 08b9ab9996
2 changed files with 22 additions and 1 deletions
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22
drivers/mtd/nand/denali.c
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@ -1677,6 +1677,25 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
goto failed_nand;
}
/* support for multi nand
* MTD known nothing about multi nand,
* so we should tell it the real pagesize
* and anything necessery
*/
denali->devnum = ioread32(denali->flash_reg + DEVICES_CONNECTED);
denali->nand.chipsize <<= (denali->devnum - 1);
denali->nand.page_shift += (denali->devnum - 1);
denali->nand.pagemask = (denali->nand.chipsize >>
denali->nand.page_shift) - 1;
denali->nand.bbt_erase_shift += (denali->devnum - 1);
denali->nand.phys_erase_shift = denali->nand.bbt_erase_shift;
denali->nand.chip_shift += (denali->devnum - 1);
denali->mtd.writesize <<= (denali->devnum - 1);
denali->mtd.oobsize <<= (denali->devnum - 1);
denali->mtd.erasesize <<= (denali->devnum - 1);
denali->mtd.size = denali->nand.numchips * denali->nand.chipsize;
denali->bbtskipbytes *= denali->devnum;
/* second stage of the NAND scan
* this stage requires information regarding ECC and
* bad block management. */
@ -1713,6 +1732,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
denali_write32(8, denali->flash_reg + ECC_CORRECTION);
}
denali->nand.ecc.bytes *= denali->devnum;
denali->nand.ecc.layout->eccbytes *=
denali->mtd.writesize / ECC_SECTOR_SIZE;
denali->nand.ecc.layout->oobfree[0].offset =
@ -1738,7 +1758,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
denali->nand.ecc.hwctl = denali_ecc_hwctl;
/* override the default read operations */
denali->nand.ecc.size = denali->mtd.writesize;
denali->nand.ecc.size = ECC_SECTOR_SIZE * denali->devnum;
denali->nand.ecc.read_page = denali_read_page;
denali->nand.ecc.read_page_raw = denali_read_page_raw;
denali->nand.ecc.write_page = denali_write_page;

1
drivers/mtd/nand/denali.h
View File

@ -764,6 +764,7 @@ struct denali_nand_info {
int irq_debug_array[32];
int idx;
uint32_t devnum; /* represent how many nands connected */
uint32_t fwblks; /* represent how many blocks FW used */
uint32_t totalblks;
uint32_t blksperchip;