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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-05-09 12:38:40 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-05-10 08:18:00 +0200 |
| commit | 7ba65d24173a761c069198fc69aa2550840141ef (patch) | |
| tree | e8367b7a7a5774f242dcb6973b34fcfa02c0bb09 /drivers/mtd/nand/nand_mxs.c | |
| parent | 06f5a7c9ad41a78f6e19eca96574bb3c49d058c8 (diff) | |
| download | barebox-7ba65d24173a761c069198fc69aa2550840141ef.tar.gz barebox-7ba65d24173a761c069198fc69aa2550840141ef.tar.xz | |
mtd: nand: nand_mxs: Factor out BCH setup function
The BCH setup has to be changed during runtime with the following
patches, so factor out a function for it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mtd/nand/nand_mxs.c')
| -rw-r--r-- | drivers/mtd/nand/nand_mxs.c | 59 |
1 files changed, 28 insertions, 31 deletions
diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c index 20bda14b62..be7f88fc1e 100644 --- a/drivers/mtd/nand/nand_mxs.c +++ b/drivers/mtd/nand/nand_mxs.c @@ -635,6 +635,33 @@ static uint8_t mxs_nand_read_byte(struct mtd_info *mtd) return buf; } +static void mxs_nand_config_bch(struct mtd_info *mtd, int readlen) +{ + struct nand_chip *nand = mtd->priv; + struct mxs_nand_info *nand_info = nand->priv; + int chunk_size; + void __iomem *bch_regs = nand_info->bch_base; + + if (mxs_nand_is_imx6(nand_info)) + chunk_size = MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2; + else + chunk_size = MXS_NAND_CHUNK_DATA_CHUNK_SIZE; + + writel((mxs_nand_ecc_chunk_cnt(readlen) - 1) + << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET | + MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET | + chunk_size, + bch_regs + BCH_FLASH0LAYOUT0); + + writel(readlen << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET | + chunk_size, + bch_regs + BCH_FLASH0LAYOUT1); +} + /* * Read a page from NAND. */ @@ -1104,7 +1131,6 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd) struct nand_chip *nand = mtd->priv; struct mxs_nand_info *nand_info = nand->priv; void __iomem *bch_regs = nand_info->bch_base; - uint32_t layout0, layout1; int ret; /* Reset BCH. Don't use SFTRST on MX23 due to Errata #2847 */ @@ -1113,36 +1139,7 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd) if (ret) return ret; - if (mxs_nand_is_imx6(nand_info)) { - layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1) - << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET | - MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET | - (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET | - MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2; - - layout1 = (mtd->writesize + mtd->oobsize) - << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET | - (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET | - MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2; - } else { - layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1) - << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET | - MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET | - (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << BCH_FLASHLAYOUT0_ECC0_OFFSET | - MXS_NAND_CHUNK_DATA_CHUNK_SIZE; - - layout1 = (mtd->writesize + mtd->oobsize) - << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET | - (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << BCH_FLASHLAYOUT1_ECCN_OFFSET | - MXS_NAND_CHUNK_DATA_CHUNK_SIZE; - } - - writel(layout0, bch_regs + BCH_FLASH0LAYOUT0); - writel(layout1, bch_regs + BCH_FLASH0LAYOUT1); + mxs_nand_config_bch(mtd, mtd->writesize + mtd->oobsize); /* Set *all* chip selects to use layout 0 */ writel(0, bch_regs + BCH_LAYOUTSELECT); |