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| author | Pekon Gupta <pekon@ti.com> | 2014-03-03 15:38:31 +0530 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-20 02:55:27 -0700 |
| commit | c5957a320122bed3262da7a3a57d6a89aaeb4358 (patch) | |
| tree | f061e67a3524c10fd41d887f36968d1db2911ad9 /drivers/mtd/nand | |
| parent | 7c977c3eb29837191f4154d819e552786bc42003 (diff) | |
| download | linux-stable-c5957a320122bed3262da7a3a57d6a89aaeb4358.tar.gz linux-stable-c5957a320122bed3262da7a3a57d6a89aaeb4358.tar.bz2 linux-stable-c5957a320122bed3262da7a3a57d6a89aaeb4358.zip | |
mtd: nand: omap: ecc.hwctl: refactor omap_enable_hwecc_bch for ECC related GPMC configs
Lots of if..then..else conditions in omap_enable_hwecc_bch() can be avoided if
code is refactored based on ecc-scheme.
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/omap2.c | 74 |
1 files changed, 50 insertions, 24 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index fad1d946c449..cabc4b67041c 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -1057,20 +1057,11 @@ static void __maybe_unused omap_enable_hwecc_bch(struct mtd_info *mtd, int mode) unsigned int dev_width, nsectors; struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); + enum omap_ecc ecc_opt = info->ecc_opt; struct nand_chip *chip = mtd->priv; u32 val, wr_mode; unsigned int ecc_size1, ecc_size0; - /* Using wrapping mode 6 for writing */ - wr_mode = BCH_WRAPMODE_6; - - /* - * ECC engine enabled for valid ecc_size0 nibbles - * and disabled for ecc_size1 nibbles. - */ - ecc_size0 = BCH_ECC_SIZE0; - ecc_size1 = BCH_ECC_SIZE1; - /* Perform ecc calculation on 512-byte sector */ nsectors = 1; @@ -1079,23 +1070,58 @@ static void __maybe_unused omap_enable_hwecc_bch(struct mtd_info *mtd, int mode) /* Multi sector reading/writing for NAND flash with page size < 4096 */ if (info->is_elm_used && (mtd->writesize <= 4096)) { - if (mode == NAND_ECC_READ) { - /* Using wrapping mode 1 for reading */ - wr_mode = BCH_WRAPMODE_1; - - /* - * ECC engine enabled for ecc_size0 nibbles - * and disabled for ecc_size1 nibbles. - */ - ecc_size0 = (nerrors == 8) ? - BCH8R_ECC_SIZE0 : BCH4R_ECC_SIZE0; - ecc_size1 = (nerrors == 8) ? - BCH8R_ECC_SIZE1 : BCH4R_ECC_SIZE1; - } - /* Perform ecc calculation for one page (< 4096) */ nsectors = info->nand.ecc.steps; } + /* GPMC configurations for calculating ECC */ + switch (ecc_opt) { + case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW: + if (mode == NAND_ECC_READ) { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } else { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } + break; + case OMAP_ECC_BCH4_CODE_HW: + if (mode == NAND_ECC_READ) { + wr_mode = BCH_WRAPMODE_1; + ecc_size0 = BCH4R_ECC_SIZE0; + ecc_size1 = BCH4R_ECC_SIZE1; + } else { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } + break; + case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW: + if (mode == NAND_ECC_READ) { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } else { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } + break; + case OMAP_ECC_BCH8_CODE_HW: + if (mode == NAND_ECC_READ) { + wr_mode = BCH_WRAPMODE_1; + ecc_size0 = BCH8R_ECC_SIZE0; + ecc_size1 = BCH8R_ECC_SIZE1; + } else { + wr_mode = BCH_WRAPMODE_6; + ecc_size0 = BCH_ECC_SIZE0; + ecc_size1 = BCH_ECC_SIZE1; + } + break; + default: + return; + } writel(ECC1, info->reg.gpmc_ecc_control); |