Commit graph

22 commits

Author SHA1 Message Date
Scott Wood
418396e212 nand: extend .raw accesses to work on multiple pages
A use for this is to read, modify, erase, and write an entire block as a
single unit, as a replacement for the biterr command.  This way gives
more flexibility in that you can also test multiple bit errors, errors
in the ECC, etc.

Signed-off-by: Scott Wood <scottwood@freescale.com>
2012-05-18 17:34:31 -05:00
Scott Wood
578931b34d nand: Introduce CONFIG_SYS_NAND_SELF_INIT
This allows a driver to run code between nand_scan_ident() and
nand_scan_tail(), among other things.  See the additions to
doc/README.nand for details.

To allow a gradual transition, Boards that don't set
CONFIG_SYS_NAND_SELF_INIT will still be initialized the old way, but
new drivers should not require this, and existing drivers should be
converted when convenient.

Signed-off-by: Scott Wood <scottwood@freescale.com>
2012-01-26 16:09:06 -06:00
Marek Vasut
fb3659ac42 NAND: Add nand read.raw and write.raw commands
These commands should work around various "hardware" ECC and BCH methods.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
[scottwood@freescale.com: s/write the page/access the page/]
Signed-off-by: Scott Wood <scottwood@freescale.com>
2011-10-03 18:35:12 -05:00
Ben Gardiner
c9494866df cmd_nand: add nand write.trimffs command
Add another nand write. variant, trimffs. This command will request of
nand_write_skip_bad() that all trailing all-0xff pages will be
dropped from eraseblocks when they are written to flash as-per the
reccommended behaviour of the UBI FAQ [1].

The function that implements this timming is the drop_ffs() function
by Artem Bityutskiy, ported from the mtd-utils tree.

[1] http://www.linux-mtd.infradead.org/doc/ubi.html#L_flasher_algo

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
CC: Artem Bityutskiy <dedekind1@gmail.com>
CC: Detlev Zundel <dzu@denx.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2011-07-01 15:56:51 -05:00
Scott Wood
be33b046b5 Remove legacy NAND and disk on chip code.
Legacy NAND had been scheduled for removal.  Any boards that use this
were already not building in the previous release due to an #error.

The disk on chip code in common/cmd_doc.c relies on legacy NAND,
and it has also been removed.  There is newer disk on chip code
in drivers/mtd/nand; someone with access to hardware and sufficient
time and motivation can try to get that working, but for now disk
on chip is not supported.

Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-07-16 19:07:47 -05:00
David Brownell
6e29ed8e57 davinci_nand: cleanup II (CONFIG_SYS_DAVINCI_BROKEN_ECC)
Remove CONFIG_SYS_DAVINCI_BROKEN_ECC option.  It's not just nasty;
it's also unused by any current boards, and doesn't even match the
main U-Boot distributions from TI (which use soft ECC, or 4-bit ECC
on newer chips that support it).

DaVinci GIT kernels since 2.6.24, and mainline Linux since 2.6.30,
match non-BROKEN code paths for 1-bit HW ECC.  The BROKEN code paths
do seem to partially match what MontaVista/TI kernels (4.0/2.6.10,
and 5.0/2.6.18) do ... but only for small pages.  Large page support
is really broken (and it's unclear just what software it was trying
to match!), and the ECC layout was making three more bytes available
for use by filesystem (or whatever) code.

Since this option itself seems broken, remove it.  Add a comment
about the MV/TI compat issue, and the most straightforward way to
address it (should someone really need to solve it).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-07-07 17:58:01 -05:00
Scott Wood
99067b08f4 Noisily disable the legacy NAND subsystem.
Legacy NAND is marked for feature removal after April 2009 (i.e. this
upcoming release).  There are still several boards that reference it
(though many do so only for disk-on-chip support which has been silently
disabled for a while now).  These boards will now fail to build
with #error, though the code is still there if the user removes #error.

The plan is to remove the code outright in the next release, along with
any board code that refers to it (such as board/esd/common/auto_update.c).

Also, remove the legacy NAND API description from README.nand.

Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-04-03 15:27:26 -05:00
Wolfgang Grandegger
6c869637fe NAND: rename NAND_MAX_CHIPS to CONFIG_SYS_NAND_MAX_CHIPS
This patch renames NAND_MAX_CHIPS to CONFIG_SYS_NAND_MAX_CHIPS and
changes the default from 8 to 1 for the legacy and the new MTD
NAND layer. This allows to remove all NAND_MAX_CHIPS definitions
in the board config files because none of the boards use multi
chip support (NAND_MAX_CHIPS > 1) so far. The bamboo and the DU440
define

 #define NAND_MAX_CHIPS          CONFIG_SYS_MAX_NAND_DEVICE

but that's bogus and did not work anyhow.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-01-23 10:32:51 -06:00
Jean-Christophe PLAGNIOL-VILLARD
6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00
Hugo Villeneuve
9b05aa788b ARM DaVinci: Fix broken HW ECC for large page NAND.
Based on original patch by Bernard Blackham <bernard@largestprime.net>

U-boot's HW ECC support for large page NAND on Davinci is completely
broken.  Some kernels, such as the 2.6.10 one supported by
MontaVista for DaVinci, rely upon this broken behaviour as they
share the same code for ECCs. In the existing scheme, error
detection *might* work on large page, but error correction
definitely does not.  Small page ECC correction works, but the
format is not compatible with the mainline git kernel.

This patch adds ECC code that matches what is currently in the
Davinci git repository (since NAND support was added in 2.6.24).
This makes the ECC and OOB layout written by u-boot compatible with
Linux for both small page and large page devices and fixes ECC
correction for large page devices.

The old behaviour can be restored by defining the macro
CFG_DAVINCI_BROKEN_ECC, which is undefined by default.

Signed-off-by: Hugo Villeneuve <hugo.villeneuve@lyrtech.com>
Acked-by: Sergey Kubushyn <ksi@koi8.net>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2008-09-10 11:40:30 -05:00
Jean-Christophe PLAGNIOL-VILLARD
cc4a0ceeac drivers/mtd/nand: Move conditional compilation to Makefile
rename CFG_NAND_LEGACY to CONFIG_NAND_LEGACY

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-08-13 01:40:43 +02:00
Scott Wood
984e03cdf1 NAND: Always skip blocks on read/write/boot.
Use of the non-skipping versions was almost always (if not always)
an error, and no valid use case has been identified.

Signed-off-by: Scott Wood <scottwood@freescale.com>
2008-08-12 11:31:27 -05:00
Marcel Ziswiler
10c7382bc5 fix various comments
Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
2008-01-09 21:50:47 +01:00
Jon Loeliger
b5501f7d72 Update README.* to reference new CONFIG_CMD_* names now.
Signed-off-by: Jon Loeliger <jdl@freescale.com>
2007-07-09 19:10:03 -05:00
Stefan Roese
323bfa8f43 Remove BOARDLIBS usage completely
Signed-off-by: Stefan Roese <sr@denx.de>
2007-04-23 12:00:22 +02:00
Stefan Roese
856f054410 [PATCH] NAND: Partition name support added to NAND subsystem
chpart, nboot and NAND subsystem related commands now accept also partition
name to specify offset.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Stefan Roese <sr@denx.de>
2006-10-28 17:11:10 +02:00
Wolfgang Denk
fcfed4f2f2 Coding Style cleanup. 2006-10-18 22:44:38 +02:00
Stefan Roese
2255b2d204 * Several improvements to the new NAND subsystem:
- JFFS2 related commands implemented in mtd-utils style
  - Support for bad blocks
  - Bad block testing commands
  - NAND lock commands
  Please take a look at doc/README.nand for more details
  Patch by Guido Classen, 10 Oct 2006
2006-10-10 12:38:50 +02:00
Wolfgang Denk
bfc81252c0 Minor code cleanup 2006-03-06 13:03:37 +01:00
Wolfgang Denk
4e3ccd2692 Merge the new NAND code (testing-NAND brach); see doc/README.nand
Rewrite of NAND code based on what is in 2.6.12 Linux kernel
Patch by Ladislav Michl, 29 Jun 2005

[Merge with /home/tur/nand/u-boot]
2006-03-06 11:25:22 +01:00
wdenk
8bde7f776c * Code cleanup:
- remove trailing white space, trailing empty lines, C++ comments, etc.
  - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)

* Patches by Kenneth Johansson, 25 Jun 2003:
  - major rework of command structure
    (work done mostly by Michal Cendrowski and Joakim Kristiansen)
2003-06-27 21:31:46 +00:00
wdenk
7a8e9bed17 * Patch by Marc Singer, 29 May 2003:
Fixed rarp boot method for IA32 and other little-endian CPUs.

* Patch by Marc Singer, 28 May 2003:
  Added port I/O commands.

* Patch by Matthew McClintock, 28 May 2003
  - cpu/mpc824x/start.S: fix relocation code when booting from RAM
  - minor patches for utx8245

* Patch by Daniel Engström, 28 May 2003:
  x86 update

* Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
  add nand flash support to SXNI855T configuration
  fix/extend nand flash support:
  - fix 'nand erase' command so does not erase bad blocks
  - fix 'nand write' command so does not write to bad blocks
  - fix nand_probe() so handles no flash detected properly
  - add doc/README.nand
  - add .jffs2 and .oob options to nand read/write
  - add 'nand bad' command to list bad blocks
  - add 'clean' option to 'nand erase' to write JFFS2 clean markers
  - make NAND read/write faster

* Patch by Rune Torgersen, 23 May 2003:
  Update for MPC8266ADS board
2003-05-31 18:35:21 +00:00