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author | Brian Norris <computersforpeace@gmail.com> | 2016-05-06 01:04:53 (GMT) |
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committer | Brian Norris <computersforpeace@gmail.com> | 2016-05-06 01:04:53 (GMT) |
commit | 2cbaf5491cb7095252c72e74e79863b75ad2d8d0 (patch) | |
tree | 45bae656589e8e9bcce5b7c47687d96fa1d8ac94 /drivers/mtd/devices | |
parent | abbbc60a0c69e05c965ce51cb75c0bee56dc0025 (diff) | |
parent | 666b65683dad9aa90efaa4aad24ef3710101e3aa (diff) | |
download | linux-2cbaf5491cb7095252c72e74e79863b75ad2d8d0.tar.xz |
Merge tag 'nand/for-4.7' of github.com:linux-nand/linux
Updates from Boris Brezillon:
This pull request contains the following infrastructure changes:
* introduction of the ECC algo concept to extend the ECC mode one
* replacement of the nand_ecclayout infrastructure by something more
future-proof.
* addition of an mtd-activity led trigger to replace the nand-activity
one
And a bunch of specific NAND driver improvements/fixes. Here are the
changes that are worth mentioning:
* rework of the OMAP GPMC and NAND drivers
* prepare the sunxi NAND driver to receive DMA support
* handle bitflips in erased pages on GPMI revisions that do not support
this in hardware.
* tag 'nand/for-4.7' of github.com:linux-nand/linux: (152 commits)
mtd: brcmnand: respect ECC algorithm set by NAND subsystem
gpmi-nand: Handle ECC Errors in erased pages
Documentation: devicetree: deprecate "soft_bch" nand-ecc-mode value
mtd: nand: add support for "nand-ecc-algo" DT property
mtd: mtd: drop NAND_ECC_SOFT_BCH enum value
mtd: drop support for NAND_ECC_SOFT_BCH as "soft_bch" mapping
mtd: nand: read ECC algorithm from the new field
mtd: nand: fsmc: validate ECC setup by checking algorithm directly
mtd: nand: set ECC algorithm to Hamming on fallback
staging: mt29f_spinand: set ECC algorithm explicitly
CRIS v32: nand: set ECC algorithm explicitly
mtd: nand: atmel: set ECC algorithm explicitly
mtd: nand: davinci: set ECC algorithm explicitly
mtd: nand: bf5xx: set ECC algorithm explicitly
mtd: nand: omap2: Fix high memory dma prefetch transfer
mtd: nand: omap2: Start dma request before enabling prefetch
mtd: nandsim: add __init attribute
mtd: nand: move of_get_nand_xxx() helpers into nand_base.c
mtd: nand: sh_flctl: rely on generic DT parsing done in nand_scan_ident()
mtd: nand: mxc: rely on generic DT parsing done in nand_scan_ident()
...
Diffstat (limited to 'drivers/mtd/devices')
-rw-r--r-- | drivers/mtd/devices/docg3.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c index e7b2e43..b833e6c 100644 --- a/drivers/mtd/devices/docg3.c +++ b/drivers/mtd/devices/docg3.c @@ -67,16 +67,40 @@ module_param(reliable_mode, uint, 0); MODULE_PARM_DESC(reliable_mode, "Set the docg3 mode (0=normal MLC, 1=fast, " "2=reliable) : MLC normal operations are in normal mode"); -/** - * struct docg3_oobinfo - DiskOnChip G3 OOB layout - * @eccbytes: 8 bytes are used (1 for Hamming ECC, 7 for BCH ECC) - * @eccpos: ecc positions (byte 7 is Hamming ECC, byte 8-14 are BCH ECC) - * @oobfree: free pageinfo bytes (byte 0 until byte 6, byte 15 - */ -static struct nand_ecclayout docg3_oobinfo = { - .eccbytes = 8, - .eccpos = {7, 8, 9, 10, 11, 12, 13, 14}, - .oobfree = {{0, 7}, {15, 1} }, +static int docg3_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section) + return -ERANGE; + + /* byte 7 is Hamming ECC, byte 8-14 are BCH ECC */ + oobregion->offset = 7; + oobregion->length = 8; + + return 0; +} + +static int docg3_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 1) + return -ERANGE; + + /* free bytes: byte 0 until byte 6, byte 15 */ + if (!section) { + oobregion->offset = 0; + oobregion->length = 7; + } else { + oobregion->offset = 15; + oobregion->length = 1; + } + + return 0; +} + +static const struct mtd_ooblayout_ops nand_ooblayout_docg3_ops = { + .ecc = docg3_ooblayout_ecc, + .free = docg3_ooblayout_free, }; static inline u8 doc_readb(struct docg3 *docg3, u16 reg) @@ -1857,7 +1881,7 @@ static int __init doc_set_driver_info(int chip_id, struct mtd_info *mtd) mtd->_read_oob = doc_read_oob; mtd->_write_oob = doc_write_oob; mtd->_block_isbad = doc_block_isbad; - mtd->ecclayout = &docg3_oobinfo; + mtd_set_ooblayout(mtd, &nand_ooblayout_docg3_ops); mtd->oobavail = 8; mtd->ecc_strength = DOC_ECC_BCH_T; |