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authorSascha Hauer <s.hauer@pengutronix.de>2010-08-09 09:04:19 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-09-13 03:50:34 -0400
commitb8db2f51dcccbaf4d23ed44cd0c64856c58a16c0 (patch)
tree0ee47ccd841fbc340dec54864d2f40810bfa589a /drivers/mtd
parent53d1e137d5ddd8a1c5ec54c5375cb2832e1cbcd1 (diff)
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/mxc_nand.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 26caa01e34a6..b2828e84d243 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -67,7 +67,9 @@
67#define NFC_V1_V2_CONFIG1_BIG (1 << 5) 67#define NFC_V1_V2_CONFIG1_BIG (1 << 5)
68#define NFC_V1_V2_CONFIG1_RST (1 << 6) 68#define NFC_V1_V2_CONFIG1_RST (1 << 6)
69#define NFC_V1_V2_CONFIG1_CE (1 << 7) 69#define NFC_V1_V2_CONFIG1_CE (1 << 7)
70#define NFC_V1_V2_CONFIG1_ONE_CYCLE (1 << 8) 70#define NFC_V2_CONFIG1_ONE_CYCLE (1 << 8)
71#define NFC_V2_CONFIG1_PPB(x) (((x) & 0x3) << 9)
72#define NFC_V2_CONFIG1_FP_INT (1 << 11)
71 73
72#define NFC_V1_V2_CONFIG2_INT (1 << 15) 74#define NFC_V1_V2_CONFIG2_INT (1 << 15)
73 75
@@ -729,27 +731,30 @@ static void preset_v1_v2(struct mtd_info *mtd)
729{ 731{
730 struct nand_chip *nand_chip = mtd->priv; 732 struct nand_chip *nand_chip = mtd->priv;
731 struct mxc_nand_host *host = nand_chip->priv; 733 struct mxc_nand_host *host = nand_chip->priv;
732 uint16_t tmp; 734 uint16_t config1 = 0;
733 735
734 /* enable interrupt, disable spare enable */ 736 if (nand_chip->ecc.mode == NAND_ECC_HW)
735 tmp = readw(NFC_V1_V2_CONFIG1); 737 config1 |= NFC_V1_V2_CONFIG1_ECC_EN;
736 tmp &= ~NFC_V1_V2_CONFIG1_INT_MSK; 738
737 tmp &= ~NFC_V1_V2_CONFIG1_SP_EN; 739 if (nfc_is_v21())
738 if (nand_chip->ecc.mode == NAND_ECC_HW) { 740 config1 |= NFC_V2_CONFIG1_FP_INT;
739 tmp |= NFC_V1_V2_CONFIG1_ECC_EN; 741
740 } else { 742 if (!cpu_is_mx21())
741 tmp &= ~NFC_V1_V2_CONFIG1_ECC_EN; 743 config1 |= NFC_V1_V2_CONFIG1_INT_MSK;
742 }
743 744
744 if (nfc_is_v21() && mtd->writesize) { 745 if (nfc_is_v21() && mtd->writesize) {
746 uint16_t pages_per_block = mtd->erasesize / mtd->writesize;
747
745 host->eccsize = get_eccsize(mtd); 748 host->eccsize = get_eccsize(mtd);
746 if (host->eccsize == 4) 749 if (host->eccsize == 4)
747 tmp |= NFC_V2_CONFIG1_ECC_MODE_4; 750 config1 |= NFC_V2_CONFIG1_ECC_MODE_4;
751
752 config1 |= NFC_V2_CONFIG1_PPB(ffs(pages_per_block) - 6);
748 } else { 753 } else {
749 host->eccsize = 1; 754 host->eccsize = 1;
750 } 755 }
751 756
752 writew(tmp, NFC_V1_V2_CONFIG1); 757 writew(config1, NFC_V1_V2_CONFIG1);
753 /* preset operation */ 758 /* preset operation */
754 759
755 /* Unlock the internal RAM Buffer */ 760 /* Unlock the internal RAM Buffer */