NAND flavors, like serial and parallel, have a lot in common and would
benefit to share code. Let's move raw (parallel) NAND specific code in a
raw/ subdirectory, to ease the addition of a core file in nand/ and the
introduction of a spi/ subdirectory specific to SPI NANDs.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
This header was renamed to rawnand.h in Linux.
The following is the corresponding commit in Linux.
commit d4092d76a4a4e57b65910899948a83cc8646c5a5
Author: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Fri Aug 4 17:29:10 2017 +0200
mtd: nand: Rename nand.h into rawnand.h
We are planning to share more code between different NAND based
devices (SPI NAND, OneNAND and raw NANDs), but before doing that
we need to move the existing include/linux/mtd/nand.h file into
include/linux/mtd/rawnand.h so we can later create a nand.h header
containing all common structure and function prototypes.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Updates the NAND code to match Linux v4.6. The previous sync was from
Linux v4.1 in commit d3963721d9.
Note that none of the individual NAND drivers tracked Linux closely
enough to be synced themselves, other than manually applying a few
cross-tree changes.
Signed-off-by: Scott Wood <oss@buserror.net>
Tested-by: Heiko Schocher <hs@denx.de>
This change is part of the Linux 4.6 sync. It is being done before the
main sync patch in order to make it easier to address the issue across
all NAND drivers (many/most of which do not closely track their Linux
counterparts) separately from other merge issues.
Signed-off-by: Scott Wood <oss@buserror.net>
These functions are part of the Linux 4.6 sync. They are being added
before the main sync patch in order to make it easier to address the
issue across all NAND drivers (many/most of which do not closely track
their Linux counterparts) separately from other merge issues.
Signed-off-by: Scott Wood <oss@buserror.net>
nand_info[] is now an array of pointers, with the actual mtd_info
instance embedded in struct nand_chip.
This is in preparation for syncing the NAND code with Linux 4.6,
which makes the same change to struct nand_chip. It's in a separate
commit due to the large amount of changes required to accommodate the
change to nand_info[].
Signed-off-by: Scott Wood <oss@buserror.net>
In a number of places we had wordings of the GPL (or LGPL in a few
cases) license text that were split in such a way that it wasn't caught
previously. Convert all of these to the correct SPDX-License-Identifier
tag.
Signed-off-by: Tom Rini <trini@konsulko.com>
This resyncs the driver changes with the Linux version of the
driver. The driver received some feedback in the LKML and got
recently acceppted, the latest version can be found here:
https://lkml.org/lkml/2015/9/2/678
Notable changes are:
- On ECC error, reread OOB and count bit flips in OOB too.
If flipped bits are below threshold, also return an empty
OOB buffer.
- Return the amount of bit flips in vf610_nfc_read_page.
- Use endianness aware vf610_nfc_read to read ECC status.
- Do not enable IDLE IRQ (since we do not operate with an
interrupt service routine).
- Use type safe struct for buffer variants (vf610_nfc_alt_buf).
- Renamed variables in struct vf610_nfc (column and page_sz)
to reflect better what they really representing.
The U-Boot version currently does not support RAW NAND write
when using the HW ECC engine.
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
Tested-by: Stefan Agner <stefan@agner.ch>
Acked-by: Scott Wood <scottwood@freescale.com>
This changes enable ONFI detection. The Read ID command now allows
one address byte which is needed for ONFI detection. To read the
ONFI parameter page, the NAND_CMD_PARAM need to be supported. The
CMD code enables one command and one address byte along with reading
data from flash using R/B#, as specified by ONFI.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Add option to choose between current 24-error correction and 32-error
correction through Kconfig. 32-error correction allow to use NAND
chips which require up to 8-bit error correction per 512 byte (when
using 2K pages).
Signed-off-by: Stefan Agner <stefan@agner.ch>
Use in-band bad block table (NAND_BBT_NO_OOB) which allows to
use the full OOB for hardare ECC purposes. Since there is no
ECC correction on the OOB it is also safer to use in-band area
to store the bad block table marker.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Implement read of OOB area only. When using column and sector size
properties, only parts of the page can be read. However, this works
only when hardware ECC is disabled, otherwise the ECC engine would
ruin the data in the buffer. To allow OOB only reads, three points
had to be addressed:
- Set ECC mode per command.
- Handle NAND_CMD_READOOB seperate. Make sure column and sector
size is correctly set up, while disabling ECC.
- Now, the OOB data end up at the beginning of the buffer. Remove
the special handling of OOB (spareonly).
Especially bad block scans benefit from this change. On a 512MiB
SLC NAND device, the bad block scan took 1.5s less than before.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Since we do not support sub-page writes anyway, reading the page
back to the controller on SEQIN command is not required. Remove
the page read on SEQIN.
However, the column/page values relevant to the SEQIN command, hence
set the column/row address on SEQIN command.
Signed-off-by: Stefan Agner <stefan@agner.ch>
To improve performance we remember the current page in the buffer
and avoid reading it twice. This implicit page cache increases
complexity while does not increase performance in real world cases.
This patch removes that feature.
Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Testing showed, that commands like STATUS made the buffer dirty
when executed with NFC_SECSZ set to the page size. It looks
like the controller transfers bogus data when this register
is configured. When setting it to 0, the buffer does not get
altered while the status command still seems to work flawless.
Signed-off-by: Stefan Agner <stefan@agner.ch>
The driver tries to re-use the page buffer by storing the page
number of the current page in the buffer. The page is only read
if the requested page number is not currently in the buffer. When
a block is erased, the page number is marked as invalid if the
erased page equals the one currently in the cache. However, since
a erase block consists of multiple pages, also other page numbers
could be affected.
The commands to reproduce this issue (on a written page):
> nand dump 0x800
> nand erase 0x0 0x20000
> nand dump 0x800
The second nand dump command returns the data from the buffer,
while in fact the page is erased (0xff).
Avoid the hassle to calculate whether the page is affected or not,
but set the page buffer unconditionally to invalid instead.
Signed-off-by: Stefan Agner <stefan@agner.ch>
This patch disables subpage writes for vf610_nfc nand
driver. This is required, as without this fix, writing
unaligned u-boot images with DFU results in a hang.
Trying to write unalgined binary images also results
in a hang, without disabling subpage writes.
Patch has been tested on a Colibri VF61 module.
Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
This adds initial support for Freescale NFC (NAND Flash Controller)
found in ARM Vybrid SoC's, Power Architecture MPC5125 and others.
The driver is called vf610_nfc since this is the first supported
and tested hardware platform supported by the driver.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
Miquel Raynal
Tom Rini
Masahiro Yamada
Scott Wood
Stefan Agner
Sanchayan Maity