Some SPI masters (ep93xx) have limitations when using the SFRMOUT
signal for the spi device chip select.  The SFRMOUT signal is
only asserted as long as the spi transmit fifo contains data.  As
soon as the last bit is clocked into the receive fifo it gets
deasserted.

The functions sst25l_status and sst25l_match_device use the API
function spi_write_then_read to write a command to the flash then
read the response back.  This API function creates a two part spi
message for the write then read.  When this message is transferred
the SFRMOUT signal ends up getting deasserted after the command
phase.  This causes the command to get aborted by the device so
the read phase returns invalid data.

By changing sst25l_status and sst25l_match_device to use a single
transfer synchronous message, the SFRMOUT signal stays asserted
during the entire message so the correct data always gets returned.

This change will have no effect on SPI masters which use a chip
select mechanism (GPIO's, etc.) which does stay asserted correctly.
As a bonus, the single transfer synchronous messages complete faster
than multi-part messages.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch adds a driver for OneNAND controller on Samsung SoCs.
Following SoCs are supported: S3C6400, S3C6410, S5PC100 and S5PC110.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Some chips fails to identify properly when SYNC_WRITE mode is enabled
(the example is OneNAND on S5PC110 SoC). This patch adds a workaround
for such chips.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch adds a new callback for the underlying drivers, which is
called instead of accessing the buffer ram directly. This callback will
be used by Samsung OneNAND driver to implement DMA transfers on S5PC110
SoC.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch extends OneNAND core code with support for OneNAND verify
write check. This is done by allocating the buffer for verify read
directly from the core code.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch adds support for OneNAND chips that have 4KiB page size.
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Nothing very important, this just makes git am stop producing warnings.
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Factor out old manufacturers and use the generic ones from cfi.h
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch adds support for detecting SST 39VF32xxB and 39VF64xxB
chips in CFI mode.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

SST 39VF{16,32}xx chips use the 0x0701 command set, fully compatible
with the AMD one. This patch adds support for detecting them in CFI
mode.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Accept values of 2-5 for TopBottom, where the newly-added 4 and 5 values
mean a uniform layout. It does indicate WP layout but we don't handle that.

Also don't say "broken" when swapping erase regions in a top-boot chip.
That got retrospectively documented in the spec.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

After looking at AMD's CFI specification [1], both of the extended query
tables are optional. Thus, it looks like relying that at least one of
those tables exist is a bug in cfi_cmdset_0002.

This patch inverts the logic and checks for unlock function pointers before
exiting on error. This approach leaves place to add a call to a fixup
function to try to handle chips compatible with the early AMD specification
from 1995 [2].

[1] http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_r20.pdf
[2] http://noel.feld.cvut.cz/hw/amd/20158a.pdfSigned-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Use P_ID_* definitions already in include/linux/mtd/cfi.h instead of the
hardcoded values. Make the code more readable.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

SST 39VF160x and 39VF320x chips use vendorname id 0x0701 and alternative
unlock addresses. Add support for them in cfi_probe.c.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Make the addresses used to enter Auto Select Mode variable to leave place
for handling chips using non-standard addresses.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Move the code to enter Auto Select Mode down to be able to use cfi->cfiq
members to add support for chips using alternative sequence / unlock
addresses.
Signed-off-by: NGuillaume LECERF <glecerf@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Add a kirkwood_nand_init_rnb() call to allow boards which
have RnB line detection to register this instead of a
static delay.
Signed-off-by: NBen Dooks <ben@simtec.co.uk>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Add support for a board to register a callback to get the state of the
RnB line if it has it attached.
Signed-off-by: NBen Dooks <ben@simtec.co.uk>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

2GB xD card, and 4MB SmartMedia ROM card share same ID, so to make both work
split xD and smartmedia ID tables.

Hardware driver must be able to know which type it handles (and probably just one).
Signed-off-by: NMaxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

On i.MX21 SoCs, if the NFC_CONFIG1:NFC_INT_MASK bit is set,
NFC_CONFIG2:NFC_INT always reads out zero, even if an
operation is completed.  This patch uses enable_irq and
disable_irq_nosync instead of NFC_CONFIG1:NFC_INT_MASK to
mask NFC interrupts.  This allows NFC_CONFIG2:NFC_INT to also
be used to detect operation completion on i.MX21.

The i.MX21 NFC does not signal reset completion using
NFC_CONFIG1:NFC_INT_MASK, so instead reset completion is
tested by checking if NFC_CONFIG2 becomes 0.
Signed-off-by: NIvo Clarysse <ivo.clarysse@gmail.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch allows the mxc_nand driver to reset the NAND
flash controller.  NFC registers are (re-)set after
completion of the reset, as a reset will have reverted
the NFC registers to their default values.
Signed-off-by: NIvo Clarysse <ivo.clarysse@gmail.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This is to support custom partitioning schemes for embedded PPC. To use
define your own mtd_part_parser and then add something like:
   linux,part-probe = "my_probe", "cmdlinepart";
To the board's dts file.

If linux,part-probe is not specified then this behaves the same as before.
Signed-off-by: NJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Use kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Use kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/denali.c:1427: error: conflicting types for ‘enable_dma’
arch/powerpc/include/asm/dma.h:189: note: previous definition of ‘enable_dma’ was here
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

There is more work to be done on this but it is basically working now.
Signed-off-by: NJason Roberts <jason.e.roberts@intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch fixes a build failure[1] by simply moving the function mtd_to_flctl
beneath the definition of sh_flctl which it uses.

BF introduced by patch
'mtd/nand/sh_flctl: Replace the dangerous mtd_to_flctl macro' (67026418)
Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Conflicts:
	drivers/mtd/mtdcore.c

Pull in the bdi fixes and ARM platform changes that other outstanding
patches depend on.

The revision in SVR for MPC5123 is 3.  The NFC is the same as MPC5121
revision 2.
Signed-off-by: NSteve Deiters <SteveDeiters@basler.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

All the SST25L series flash parts have uniform erase sectors.  Remove
the extra MTD_DEBUG_LEVEL2 messages showing the eraseregions info
since they could never be shown.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Ensure that the flash device is in a quiescent state before rebooting.
The implementation is closely modeled after the cfi_cmdset_0001 reboot
notifier, commit 963a6fb0 .
Signed-off-by: NKevin Cernekee <cernekee@gmail.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The pxa32xx_nand driver doesn't support partition tables from the
command line. This patch adds support for it.
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Remove unused #include <linux/version.h>('s) in
  drivers/mtd/nand/bcm_umi_nand.c
Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com>
Acked-by: NLeo Chen <leochen@broadcom.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Moved the debugging message before the call to map_destroy, which frees its
argument.  The message is also slightly changed to reflect its new
position.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E,E2;
@@

del_mtd_device(E)
...
(
  E = E2
|
* E
)
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The use of a memcpy() during a spinlock operation will cause very long
thread context switch delays if the flash chip bandwidth is low and the
data to be copied large, because a spinlock will disable preemption.

For example: A flash with 6,5 MB/s bandwidth will cause under ubifs,
which request sometimes 128 KiB (the flash erase size), a preemption delay of
20 milliseconds. High priority threads will not be served during this
time, regardless whether this threads access the flash or not. This behavior
breaks real time.

The patch changes all the use of spin_lock operations for xxxx->mutex
into mutex operations, which is exact what the name says and means.

I have checked the code of the drivers and there is no use of atomic
pathes like interrupt or timers. The mtdoops facility will also not be used
by this drivers. So it is dave to replace the spin_lock against mutex.

There is no performance regression since the mutex is normally not
acquired.

Changelog:
 06.03.2010 First release
 26.03.2010 Fix mutex[1] issue and tested it for compile failure
Signed-off-by: NStefani Seibold <stefani@seibold.net>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The original macro worked only when applied to variables named 'mtd'.
While this could have been fixed by simply renaming the macro argument,
a more type-safe replacement is preferred.
Signed-off-by: NFerenc Wagner <wferi@niif.hu>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The original macro worked only when applied to variables named 'mtd'.
While this could have been fixed by simply renaming the macro argument,
a more type-safe replacement is preferred.
Signed-off-by: NFerenc Wagner <wferi@niif.hu>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Functions omap2_onenand_write_bufferram() and omap3_onenand_write_bufferram()
map the write buffer and store the returned handle in variable dma_src. However,
when DMA unmap is done, variable dma_dst is used instead of the correct dma_src.

This patch fixes them to use the correct DMA buffer.
Signed-off-by: NMika Westerberg <ext-mika.1.westerberg@nokia.com>
Tested-by: NArnaud Ebalard <arno@natisbad.org>
Acked-by: NAdrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Convert all magic numbers into appropriate defines, and move the defines
out of the global namespace and into this one driver.  No other driver
needs to care about the MMR layout anyways.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>