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mtd: mxc_nand: configure pages per block for v2 controller 

This patch initializes the pages per block field in CONFIG1 for
v2 controllers. It also sets the FP_INT field. This is the last
field not correctly initialized, so we can switch from
read/modify/write the CONFIG1 reg to just write the correct
value.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: John Ogness <john.ogness@linutronix.de>
Tested-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Sascha Hauer 2010-08-09 15:04:19 +02:00 committed by David Woodhouse
parent 53d1e137d5
commit b8db2f51dc
1 changed files with 18 additions and 13 deletions
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31
drivers/mtd/nand/mxc_nand.c
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@ -67,7 +67,9 @@
#define NFC_V1_V2_CONFIG1_BIG (1 << 5)
#define NFC_V1_V2_CONFIG1_RST (1 << 6)
#define NFC_V1_V2_CONFIG1_CE (1 << 7)
#define NFC_V1_V2_CONFIG1_ONE_CYCLE (1 << 8)
#define NFC_V2_CONFIG1_ONE_CYCLE (1 << 8)
#define NFC_V2_CONFIG1_PPB(x) (((x) & 0x3) << 9)
#define NFC_V2_CONFIG1_FP_INT (1 << 11)
#define NFC_V1_V2_CONFIG2_INT (1 << 15)
@ -729,27 +731,30 @@ static void preset_v1_v2(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
uint16_t tmp;
uint16_t config1 = 0;
/* enable interrupt, disable spare enable */
tmp = readw(NFC_V1_V2_CONFIG1);
tmp &= ~NFC_V1_V2_CONFIG1_INT_MSK;
tmp &= ~NFC_V1_V2_CONFIG1_SP_EN;
if (nand_chip->ecc.mode == NAND_ECC_HW) {
tmp |= NFC_V1_V2_CONFIG1_ECC_EN;
} else {
tmp &= ~NFC_V1_V2_CONFIG1_ECC_EN;
}
if (nand_chip->ecc.mode == NAND_ECC_HW)
config1 |= NFC_V1_V2_CONFIG1_ECC_EN;
if (nfc_is_v21())
config1 |= NFC_V2_CONFIG1_FP_INT;
if (!cpu_is_mx21())
config1 |= NFC_V1_V2_CONFIG1_INT_MSK;
if (nfc_is_v21() && mtd->writesize) {
uint16_t pages_per_block = mtd->erasesize / mtd->writesize;
host->eccsize = get_eccsize(mtd);
if (host->eccsize == 4)
tmp |= NFC_V2_CONFIG1_ECC_MODE_4;
config1 |= NFC_V2_CONFIG1_ECC_MODE_4;
config1 |= NFC_V2_CONFIG1_PPB(ffs(pages_per_block) - 6);
} else {
host->eccsize = 1;
}
writew(tmp, NFC_V1_V2_CONFIG1);
writew(config1, NFC_V1_V2_CONFIG1);
/* preset operation */
/* Unlock the internal RAM Buffer */