OpenCloudOS-Kernel/drivers/mtd
Masahiro Yamada 24715c749b mtd: nand: denali: support HW_ECC_FIXUP capability
Some old versions of the Denali IP (perhaps used only for Intel?)
detects ECC errors and provides correct data via a register, but
does not touch the transferred data.  So, the software must fixup
the data in the buffer according to the provided ECC correction
information.

Newer versions perform ECC correction before transferring the data.
No more software intervention is needed.  The ECC_ERROR_ADDRESS and
ECC_CORRECTION_INFO registers were deprecated.  Instead, the number
of corrected bit-flips are reported via the ECC_COR_INFO register.
When an uncorrectable ECC error happens, a status flag is set to the
INTR_STATUS and ECC_COR_INFO registers.

As is often the case with this IP, the register view of INTR_STATUS
had broken compatibility.

For older versions (SW ECC fixup):
  bit 0:  ECC_TRANSACTION_DONE
  bit 1:  ECC_ERR

For newer versions (HW ECC fixup):
  bit 0:  ECC_UNCOR_ERR
  bit 1:  Reserved

Due to this difference, the irq_mask must be fixed too.

The existing handle_ecc() has been renamed to denali_sw_ecc_fixup()
for clarification.

What is unfortunate with this feature is we can not know the total
number of corrected/uncorrected errors in a page.  The register
ECC_COR_INFO reports the maximum of per-sector bitflips.  This is
useful for ->read_page return value, but ecc_stats.{corrected,failed}
increments may not be precise.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:34 +02:00
..
chips mtd: cfi_cmdset_0020: Deinline do_write_buffer, save 5316 bytes 2016-07-09 18:53:33 -07:00
devices Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
lpddr mtd: lpddr: show parent device in sysfs 2015-10-13 09:21:17 -07:00
maps mtd: physmap_of: fixup gemini/versatile dependencies 2017-02-10 09:53:41 -08:00
nand mtd: nand: denali: support HW_ECC_FIXUP capability 2017-04-25 14:18:34 +02:00
onenand mtd: silence some uninitialized variable warnings 2016-07-09 18:14:39 -07:00
spi-nor mtd: aspeed: remove redundant dev_err call in aspeed_smc_probe() 2017-02-10 11:20:22 -08:00
tests sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
ubi statx: Add a system call to make enhanced file info available 2017-03-02 20:51:15 -05:00
Kconfig mtd: bcm63xxpart: Remove dependency on mach-bcm63xx 2016-02-12 10:27:48 -08:00
Makefile mtd: spi-nor: shorten Kconfig naming 2014-04-14 11:23:01 -07:00
afs.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ar7part.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
bcm47xxpart.c mtd: bcm47xxpart: support layouts with multiple TRX partitions 2017-02-09 18:59:45 -08:00
bcm63xxpart.c mtd: bcm63xxpart: give width specifier an 'int', not 'size_t' 2016-03-07 13:13:58 -08:00
cmdlinepart.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ftl.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
inftlcore.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
inftlmount.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mtd_blkdevs.c block: fold cmd_type into the REQ_OP_ space 2017-01-31 14:00:44 -07:00
mtdblock.c mtd: mtdblock: remove the needless mtdblks_lock 2015-01-07 12:51:56 -08:00
mtdblock_ro.c
mtdchar.c mtd: Fix typo: "occured" -> "occurred" 2017-02-08 14:24:57 -08:00
mtdconcat.c mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition 2016-04-19 22:05:55 +02:00
mtdcore.c mtd: fix typos in ooblayout comment blocks 2017-02-08 13:32:08 -08:00
mtdcore.h mtd: partitions: support a cleanup callback for parsers 2015-12-09 14:57:44 -08:00
mtdoops.c
mtdpart.c mtd: Add partition device node to mtd partition devices 2017-02-09 19:19:25 -08:00
mtdsuper.c
mtdswap.c mtd: mtdswap: fix spelling mistake "erassure" -> "erasure" 2016-11-22 11:43:52 -08:00
nftlcore.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
nftlmount.c mtd: nftl: reorganize operations in condition check 2015-01-09 15:26:29 -08:00
ofpart.c mtd: Add partition device node to mtd partition devices 2017-02-09 19:19:25 -08:00
redboot.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
rfd_ftl.c mtd: remove some duplicative checks 2014-03-10 22:42:25 -07:00
sm_ftl.c treewide: Fix typos in printk 2016-04-18 11:23:24 +02:00
sm_ftl.h
ssfdc.c mtd: Replace if and BUG with BUG_ON 2016-07-09 18:48:54 -07:00