diff options
| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2015-04-28 02:05:32 +0200 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2015-04-28 02:05:32 +0200 |
| commit | dcca76ea36fc778fa750473aee09fa0297dc5e2b (patch) | |
| tree | 59ddcf49cc4158b63e2f08404567566fbf63f2c4 | |
| parent | a1bddaecd525096d51fba69331c924b2d314bf2f (diff) | |
tegra: nand: 16-bit bch ecc integration
Integrate 16-bit BCH ECC handling required e.g. for the latest NAND
parts assembled on Colibri T20.
| -rw-r--r-- | drivers/mtd/nand/tegra_nand.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/mtd/nand/tegra_nand.c b/drivers/mtd/nand/tegra_nand.c index 9c90634191..b02d27abc3 100644 --- a/drivers/mtd/nand/tegra_nand.c +++ b/drivers/mtd/nand/tegra_nand.c @@ -567,17 +567,12 @@ static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, if (with_ecc) { tag_size = chip->ecc.layout->oobavail + TAG_ECC_BYTES; reg_val |= (CFG_SKIP_SPARE_SEL_4 - | CFG_SKIP_SPARE_ENABLE - | CFG_HW_ECC_CORRECTION_ENABLE - | CFG_ECC_EN_TAG_DISABLE - | CFG_HW_ECC_SEL_RS - | CFG_HW_ECC_ENABLE - | CFG_TVAL4 - | (tag_size - 1)); + | CFG_SKIP_SPARE_ENABLE); if (!is_writing) tag_size += SKIPPED_SPARE_BYTES; dma_prepare(tag_ptr, tag_size, is_writing); + writel(BCH_CONFIG_BCH_TVAL16 | BCH_CONFIG_BCH_ECC_ENABLE, &info->reg->bch_config); } else { tag_size = mtd->oobsize; reg_val |= (CFG_SKIP_SPARE_DISABLE @@ -586,13 +581,13 @@ static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, | CFG_HW_ECC_DISABLE | (tag_size - 1)); dma_prepare(chip->oob_poi, tag_size, is_writing); + + writel(BCH_CONFIG_BCH_ECC_DISABLE, &info->reg->bch_config); } writel(reg_val, &info->reg->config); dma_prepare(buf, 1 << chip->page_shift, is_writing); - writel(BCH_CONFIG_BCH_ECC_DISABLE, &info->reg->bch_config); - writel(tag_size - 1, &info->reg->dma_cfg_b); nand_clear_interrupt_status(info->reg); @@ -601,7 +596,7 @@ static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, | CMD_SEC_CMD | (CMD_ALE_BYTES5 << CMD_ALE_BYTE_SIZE_SHIFT) | CMD_A_VALID - | CMD_B_VALID + | (with_ecc ? 0 : CMD_B_VALID) | (CMD_TRANS_SIZE_PAGE << CMD_TRANS_SIZE_SHIFT) | CMD_CE0; if (!is_writing) @@ -614,7 +609,7 @@ static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, reg_val = DMA_MST_CTRL_GO_ENABLE | DMA_MST_CTRL_BURST_8WORDS | DMA_MST_CTRL_EN_A_ENABLE - | DMA_MST_CTRL_EN_B_ENABLE; + | (with_ecc ? 0 : DMA_MST_CTRL_EN_B_ENABLE); if (!is_writing) reg_val |= DMA_MST_CTRL_DIR_READ; |