We cannot modify file->f_mapping->backing_dev_info, because it will corrupt
backing device of device node inode, since file->f_mapping is equal to
inode->i_mapping (see __dentry_open() in fs/open.c).

Let's introduce separate inode for MTD device with appropriate backing
device.

[dwmw2: Refactor to keep it all entirely within mtdchar.c; use iget_locked()]
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Acked-by: NJan Kara <jack@suse.cz>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Use kmemdup when some other buffer is immediately copied into the
allocated region.

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

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Doh. Pointed out by Guillaume LECERF <glecerf@gmail.com> since I managed
to miss it in my test builds. S'what I get for hacking at 2am, I suppose.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This NAND flash part advertises 0xD1 as an identifier but is still a working
128MBytes x 8bits 3.3V NAND part.
Signed-off-by: NFlorian Fainelli <ffainelli@freebox.fr>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Reported-by: NKomuro <komurojun-mbn@nifty.com>
Signed-off-by: NDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NAlexander Kurz <linux@kbdbabel.org>
Signed-off-by: NDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

After fixing the obvious errors, the driver will now compile
again on v2.6.34-rc3. First tests with two 4MB flash cards including
erase- and write test with one of the cards where successful.

Also, add two new PCMCIA_DEVICE_PROD_IDs.

[linux@dominikbrodowski.net: clean up commit message]
Signed-off-by: NAlexander Kurz <linux@kbdbabel.org>
Signed-off-by: NDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Due to a broken CFI, they have to be added to jedec_probe.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This is a slightly modified version of a patch submitted last year by
Reuben Dowle <reuben.dowle@navico.com>.  His original comments follow:

This patch adds support for some MLC NAND flashes that place the BB
marker in the LAST page of the bad block rather than the FIRST page used
for SLC NAND and other types of MLC nand.

Lifted from Samsung datasheet for K9LG8G08U0A (1Gbyte MLC NAND):
"
Identifying Initial Invalid Block(s)
All device locations are erased(FFh) except locations where the initial
invalid block(s) information is written prior to shipping. The initial
invalid block(s) status is defined by the 1st byte in the spare area.
Samsung makes sure that the last page of every initial invalid block has
non-FFh data at the column address of 2,048.
...
"

As far as I can tell, this is the same for all Samsung MLC nand, and in
fact the samsung bsp for the processor used in our project (s3c6410)
actually contained a hack similar to this patch but less portable to
enable use of their NAND parts. I discovered this problem when trying to
use a Micron NAND which does not used this layout - I wish samsung would
put their stuff in main-line to avoid this type of problem.

Currently this patch causes all MLC nand with manufacturer codes from
Samsung and ST(Numonyx) to use this alternative location, since these
are the manufactures that I know of that use this layout.
Signed-off-by: NKevin Cernekee <cernekee@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Some of the newer MLC devices have a 6-byte ID sequence in which
several field definitions differ from older chips in a manner that is
not backward compatible.  For instance:

Samsung K9GAG08U0M (5-byte sequence): ec d5 14 b6 74
4th byte, bits 1:0 encode the page size: 0=1KiB, 1=2KiB, 2=4KiB, 3=8KiB
4th byte, bits 5:4 encode the block size: 0=64KiB, 1=128KiB, ...
4th byte, bit 6 encodes the OOB size: 0=8B/512B, 1=16B/512B

Samsung K9GAG08U0D (6-byte sequence): ec d5 94 29 34 41
4th byte, bits 1:0 encode the page size: 0=2KiB, 1=4KiB, 3=8KiB, 4=rsvd
4th byte, bits 7;5:4 encode the block size: 0=128KiB, 1=256KiB, ...
4th byte, bits 6;3:2 encode the OOB size: 1=128B/page, 2=218B/page

This patch uses the new 6-byte scheme if the following conditions are
all true:

1) The ID code wraps around after exactly 6 bytes

2) Manufacturer is Samsung

3) 6th byte is zero

The patch also extends the maximum OOB size from 128B to 256B.
Signed-off-by: NKevin Cernekee <cernekee@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

With gcc 4.4.3 -O2 on MIPS32:

drivers/mtd/chips/cfi_util.c: In function 'cfi_qry_present':
include/linux/mtd/map.h:390: warning: 'r' may be used uninitialized in this function
include/linux/mtd/map.h:375: note: 'r' was declared here
include/linux/mtd/map.h:390: warning: 'r' may be used uninitialized in this function
include/linux/mtd/map.h:375: note: 'r' was declared here
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>

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>

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>