This patch deletes oobavail assignments, they're calculated by the nand
core code in nand_scan_tail, plus current oobavail values are wrong for
the LP NANDs.

Also remove mtd->ecclayout and mtd->oobavail assignments, mtd core
handles this all by itself.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch implements support for flash-based BBT for chips working
through ELBC NAND controller, so that NAND core will not have to re-scan
for bad blocks on every boot.

Because ELBC controller may provide HW-generated ECCs we should adjust
bbt pattern and bbt version positions in the OOB free area.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

For large page chips, nand_bbt is looking into OOB area, and checking
for "0xff 0xff" pattern at OOB offset 0. That is, two bytes should be
reserved for bbt means.

But ELBC driver is specifying ecclayout so that oobfree area starts at
offset 1, so only one byte left for the bbt purposes.

This causes problems with any OOB users, namely JFFS2: after first mount
JFFS2 will fill all OOBs with "erased marker", so OOBs will contain:

  OOB Data: ff 19 85 20 03 00 ff ff ff 00 00 08 ff ff ff ff
  OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
  OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
  OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

And on the next boot, NAND core will rescan for bad blocks, then will
see "0xff 0x19" pattern, and will mark all blocks as bad ones.

To fix the issue we should implement our own bad block pattern: just one
byte at OOB start. Though, this will work only for x8 chips. For x16
chips two bytes must be checked. Since ELBC driver does not support x16
NANDs (yet), we're safe for now.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

There's no reason to prevent the Atmel NAND driver from
building as a module.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The ALE signal isn't correctly wired up to the ECC controller on the
AP7000, so it starts calculating ECC during the address cycles.

Work around this by resetting the ECC controller between the address and
data cycles.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This uses __raw_{read,write}s{b,w}() primitives to access data on NAND
chips for more efficient I/O.

On an arm926 with memory clocked at 100 MHz, this reduced the elapsed time
for a 64 MiB read by 16%.  ("dd" /dev/mtd0 to /dev/null, with an 8-bit
NAND using hardware ECC and 128KiB blocksize.)

Also some minor section tweaks:

  - Use platform_driver_probe() so no pointer to probe() lingers
    after that code has been removed at run-time.

  - Use __exit and __exit_p so the remove() code will normally be
    removed by the linker.

Since these buffer read/write calls are new, this increases the runtime
code footprint (by 88 bytes on my build, after the section tweaks).

[haavard.skinnemoen@atmel.com: rebase onto atmel_nand rename]
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Use einfo, oinfo for the inner erase_info and otp_info structs used in
individual case statements.

drivers/mtd/mtdchar.c:582:26: warning: symbol 'info' shadows an earlier one
drivers/mtd/mtdchar.c:380:23: originally declared here
drivers/mtd/mtdchar.c:596:26: warning: symbol 'info' shadows an earlier one
drivers/mtd/mtdchar.c:380:23: originally declared here
drivers/mtd/mtdchar.c:704:19: warning: symbol 'info' shadows an earlier one
drivers/mtd/mtdchar.c:380:23: originally declared here
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The copy_to_user was casting away the address space to get the offset of
the length member.  Use offsetof() instead and add it to the void __user
*argp.

drivers/mtd/mtdchar.c:527:23: warning: cast removes address space of expression
drivers/mtd/mtdchar.c:527:23: warning: incorrect type in argument 1 (different address spaces)
drivers/mtd/mtdchar.c:527:23:    expected void [noderef] <asn:1>*to
drivers/mtd/mtdchar.c:527:23:    got unsigned int *<noident>
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Atmel serial flash tends to power up with the protection status bits set.
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=4089

[michael.hennerich@analog.com: remove duplicate code]
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Some of them, at least.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Make the atmel_nand driver selectable on AVR32, and update the Kconfig
help text to reflect this.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

This fixes several bugs in the atmel_nand_probe() error path, including
at least one memory leak.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

This is basically s/at91_nand/atmel_nand/g with some manual inspection.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

The AT91 NAND driver needs just a few tiny modifications to work on
AVR32 as well. Rename it atmel_nand to reflect this.

Also move the ECC register definitions into drivers/mtd/nand since they
are only useful to the atmel_nand driver, and get rid of the useless
filename at the top of each file.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

No point in using an AT91-specific GPIO API when the generic API works
just as well.
Signed-off-by: NHåvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

WARNING: drivers/mtd/nand/built-in.o(.devinit.text+0x114): Section mismatch
in reference from the function fsl_elbc_ctrl_probe() to the function
.devexit.text:fsl_elbc_ctrl_remove()

__devinit functions should not call functions with __devexit. Since probe
function calls remove in case of errors, we want to remove __devexit
attribute from it.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Although if people have questions about ARCnet, perhaps it's _better_
for them to be mailing dwmw2@cam.ac.uk about it...
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fix a mutex release bug in function m25p80_write.
Signed-off-by: NChen Gong <g.chen@freescale.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Fix nandsim build error, missing #include:

linux-next-20080605/drivers/mtd/nand/nandsim.c: In function 'divide':
linux-next-20080605/drivers/mtd/nand/nandsim.c:462: error: implicit declaration of function 'do_div'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Now it returns the 0 if cmdlineparse not supplied.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

The changelog on the driver is superflous given this
is being kept under revision control. Remove the other
cruft in the header and update the copyright and the
supported device list.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Fix a minor problem with what should have been
debug output by changing printk() to dev_dbg()
inside s3c2410_nand_update_chip().

Thanks to David Woodhouse for pointing this out.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Handle the case where flash memory and ethernet mac/phy are mapped onto
the same async bank

[try #4]
 - drop superfluous casts
 - drop SSYNC() when reading from the flash and rewrite
   bfin_copy_from() to be like bfin_copy_to() so that
   we dont have to handle all the aligned/unaligned cases

[try #3] rename bf5xx-flash to bfin-async-flash
 - move all kconfig board settings into board resources
 - fixup casting style according to lkml feedback
 - rewrite driver so that it can handle arbitrary of
   instances according to the declared platform resources

[try #2]
Remove useless SSYNC() as Will said

[try #1]
The BF533-STAMP does this for example.
All board-specific configuration goes in your board resources file.
Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Acked-By: NJörn Engel <joern@logfs.org>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Janitorial work to remove temporary pointers and make some functions a bit
more readable.
Signed-off-by: NChris Malley <mail@chrismalley.co.uk>
Reviewed-By: NJörn Engel <joern@logfs.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Once upon a time, the MTD repository was using CVS.

This patch therefore removes all usages of the no longer updated CVS
keywords from the MTD code.

This also includes code that printed them to the user.
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Amend nandsim so that it does not assume 32-bit flash size.
Signed-off-by: NAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

To get the correct information in case of power off recovery,
it should read ECC status first
Also remove previous workaround method.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

 - Add support for binary page size DataFlashes.
 - The driver now prints out pagesize and erasesize.
   Printout valuable information for creating flash filesystems.
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NMatthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NMatthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NToralf Förster <toralf.foerster@gmx.de>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

This patch add support for non-CFI Eon EN29SL800B[BT] NOR flash chips.
The Eon chips have manufacturer ID in the first bank, therefore this patch
depends on support for flash chips with ID in bank other than 0.
Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

According to JEDEC "Standard Manufacturer's Identification Code"
(http://www.jedec.org/download/search/jep106W.pdf)
several first banks of NOR flash can contain 0x7f instead of actual ID.
This patch adds support for reading manufacturer ID from banks other than 0.
Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

There's a reason why using C99 initialisers even in the supposedly
trivial structs is a good idea.
Signed-off-by: NCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>