Commit b8db2f51 authored by Sascha Hauer's avatar Sascha Hauer Committed by David Woodhouse
Browse files

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: default avatarSascha Hauer <s.hauer@pengutronix.de>
Acked-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Tested-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 53d1e137

drivers/mtd/nand/mxc_nand.c

+19 −14
Original line number Diff line number Diff line
@@ -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;



	/* 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;

	}

	uint16_t config1 = 0;



	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 */

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