Commit Graph

614 Commits

Author SHA1 Message Date
Thomas Gleixner
29072b9607 [MTD] NAND: add subpage write support
Many SLC NANDs support up to 4 writes at one NAND page. Add support
of this feature.

Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2006-11-29 17:03:52 +02:00
Josh Boyer
f6a7ecb18d [MTD] add MTD_BLKDEVS Kconfig option
Add a MTD_BLKDEVS Kconfig option to cleanup the makefile a bit

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2006-11-29 16:58:15 +02:00
Yoichi Yuasa
eb6cf7bb71 [MTD] fix map probe name for cstm_mips_ixx
This patch has fixed name of map probe for cstm_mips_ixx.c

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2006-11-29 16:57:55 +02:00
Joakim Tjernlund
967bf623e9 [PATCH] Fix Intel/Sharp command set erase suspend bug
When we sleep and wait for a suspended operation to be resumed, go
back and check until it's ready -- don't just continue after the first
time we're woken. This can cause file system corruption.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-28 17:26:50 -08:00
Andrew Morton
ce1060494a [MTD] Tidy bitrev usage in rtc_from4.c
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-29 00:19:14 +00:00
Timo Lindhorst
fc02919499 [MTD] [NAND] fix ifdef option in nand_ecc.c
Fix up the config option in the #ifdef statements in nand_ecc.c

Signed-off-by: Timo Lindhorst <lindhors@linux.vnet.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-29 00:11:39 +00:00
David Woodhouse
28bdd4a72d [MTD] [NAND] Update CAFÉ driver interrupt handler prototype
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-29 00:04:59 +00:00
David Woodhouse
103e40f633 Merge git://git.infradead.org/~kmpark/onenand-mtd-2.6 2006-11-29 00:03:10 +00:00
Burman Yan
95b93a0cd4 [MTD] replace kmalloc+memset with kzalloc
Signed-off-by: Yan Burman <yan_952@hotmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 23:47:21 +00:00
Randy Dunlap
998a43e72d [MTD] Fix printk format warning in physmap. (resources again)
Fix printk format warning:
drivers/mtd/maps/physmap.c:93: warning: long long unsigned int format, long unsigned int arg (arg 2)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 23:40:46 +00:00
David Woodhouse
1aaaeabf36 Merge git://git.infradead.org/~dwmw2/cafe-2.6 2006-11-28 22:43:10 +00:00
Vitaly Wool
7014568bad [MTD] [NAND] remove len/ooblen confusion.
As was discussed between Ricard Wanderlöf, David Woodhouse, Artem 
Bityutskiy and me, the current API for reading/writing OOB is confusing. 

The thing that introduces confusion is the need to specify ops.len 
together with ops.ooblen for reads/writes that concern only OOB not data 
area. So, ops.len is overloaded: when ops.datbuf != NULL it serves to 
specify the length of the data read, and when ops.datbuf == NULL, it 
serves to specify the full OOB read length.

The patch inlined below is the slightly updated version of the previous 
patch serving the same purpose, but with the new Artem's comments taken 
into account.

Artem, BTW, thanks a lot for your valuable input!

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:39:03 +00:00
Richard Purdie
1918767299 [MTD] Allow variable block sizes in mtd_blkdevs
Currently, mtd_blkdevs enforces a block size of 512, even if the drivers
can seemingly request a different size. This patch fixes mtd_blkdevs so
block sizes other than 512 work correctly.

Signed-off-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:27:47 +00:00
Dave Olsen
90afffc8bd [MTD] [MAPS] Support for BIOS flash chips on the nvidia ck804 southbridge
Add support for accessing BIOS flash chips connected to the NVIDIA ck804 southbridge.

Signed-off-by: Ryan Jackson <rjackson@lnxi.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:25:27 +00:00
Stefan Roese
4010db56c8 [MTD] [NAND] Fix endianess bug in ndfc.c
The writel() call accidentally clears all bits in the NDFC_CCR
register (endianess problem). Now __raw_writel() is used instead.

Tested on Bamboo with NAND on chip select 0 and chip select 1.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:22:55 +00:00
Adrian Bunk
ddacff1f20 [MTD] make drivers/mtd/cmdlinepart.c:mtdpart_setup() static
This patch makes the needlessly global mtdpart_setup() static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:19:16 +00:00
Adrian Bunk
1605cd3d9c [MTD] [NAND] rtc_from4.c: use lib/bitrev.c
This patch converts drivers/mtd/nand/rtc_from4.c to use the new
lib/bitrev.c

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-28 22:18:52 +00:00
Kyungmin Park
f4f91ac3c8 [MTD] OneNAND: Single bit error detection
Idea from Jarkko Lavinen

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-11-16 12:03:56 +09:00
Kyungmin Park
08f782b60a [MTD] OneNAND: lock support
Now you can use mtd lock inferface on OneNAND

The idea is from Nemakal, Vijaya, thanks

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-11-16 11:29:39 +09:00
Kyungmin Park
2c22120fbd MTD: OneNAND: interrupt based wait support
We can use the two methods to wait.
  1. polling: read interrupt status register
  2. interrupt: use kernel ineterrupt mechanism

  To use interrupt method, you first connect onenand interrupt pin to your
platform and configure interrupt properly

Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
2006-11-16 11:23:48 +09:00
David Woodhouse
cad40654c3 [MTD] NAND: Fix ECC settings in CAFÉ controller driver.
We were resetting cafe->ctl2 to zero after an erase (and also during a
write, but it was correctly reset after that). This meant that ECC reads
after an erase were failing. Doh.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-11-01 08:19:20 +08:00
David Woodhouse
be8444bdf3 [MTD] NAND: Add register debugging spew option to CAFÉ driver
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-31 12:36:04 +08:00
David Woodhouse
195a253b66 [MTD] NAND: Use register #defines throughout CAFÉ driver, not numbers
Also use cafe_readl() and cafe_writel() abstraction to make code
slightly cleaner -- especially if we want to use it in PIO mode.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-31 12:30:11 +08:00
David Woodhouse
a020727b16 [MTD] NAND: Fix timing calculation in CAFÉ debugging message
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-28 17:08:38 +03:00
Jesper Juhl
efbfe96c5d [PATCH] silence 'make xmldocs' warning by adding missing description of 'raw' in nand_base.c:1485
Add description of 'raw' in comments for
drivers/mtd/nand/nand_base.c::nand_write_page_syndrome() so 'make xmldocs'
will not spew a warning at us.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-27 15:34:51 -07:00
David Woodhouse
63a1423763 [MTD] NAND: Remove empty block ECC workaround
They fixed the hardware so that ECC doesn't fail on reading an empty
block.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-27 22:12:02 +03:00
David Woodhouse
7608194c4a [MTD] NAND: Add ECC debugging for CAFÉ
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-27 15:40:51 +03:00
David Woodhouse
b478c775a0 [MTD] CAFÉ NAND: Add 'slowtiming' parameter, default usedma and checkecc on
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-27 14:50:04 +03:00
David Woodhouse
dcc41bc81c [MTD] NAND: Reset Café controller before initialising.
Fixes http://dev.laptop.org/ticket/237

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-27 09:55:34 +03:00
David Woodhouse
2c8cfdcbeb [MTD] NAND: Café ECC -- remove spurious BUG_ON() in err_pos()
Being a value which isn't in the table is a case we explicitly check for
in the caller. Don't BUG_ON() because it does actually happen in
practice.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-27 09:53:08 +03:00
Ricard Wanderlöf
ff0dab64b4 [MTD] NAND: Fix nand_default_mark_blockbad() when flash-based BBT disabled
When a flash-based BBT is not used, nand_default_mark_blockbad() is supposed
to mark the block bad in the oob. However, it sets the wrong length variable
so that no bad block marker is in fact written. This patch attempts to
rectify that.

(As note, it seems to be that logically, it shouldn't be necessary to set
both length variables, as one appears to be for the main buffer, and
one for the oob buffer, but this is how it is done in several places,
including the code for the mtd character device MEMWRITEOOB and MEMREADOOB
ioctls. I'm not sure if this is a temporary solution during some rework of
the mtd infrastructure, or whether there is a deeper thought here.)

Signed-off-by: Ricard Wanderlöf <ricardw@axis.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-26 13:17:49 +03:00
David Woodhouse
470b0a90d6 [MTD] NAND: Disable ECC checking on CAFÉ since it's broken for now
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-23 14:29:04 +01:00
David Woodhouse
fbad5696c5 [MTD] NAND: CAFÉ NAND driver cleanup, fix ECC on reading empty flash
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-22 15:09:33 +01:00
David Woodhouse
04459d7c62 [MTD] NAND: Add hardware ECC correction support to CAFÉ NAND driver
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-22 02:18:48 +01:00
David Woodhouse
c45aa055c3 Merge git://git.infradead.org/~dwmw2/cafe-2.6
Conflicts:

	drivers/mtd/nand/Kconfig
2006-10-22 02:17:05 +01:00
David Woodhouse
784f4d5e66 [MTD] NAND: Correct setting of chip->oob_poi OOB buffer
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-22 01:47:45 +01:00
David Woodhouse
7dcdcbef5d [MTD] NAND: Combined oob buffer so it's contiguous with data
Ditch the separate oobrbuf and oobwbuf fields from the chip buffers,
and use only a single buffer immediately after the data. This accommodates
NAND controllers such as the OLPC CAFÉ chip, which can't do scatter/gather
DMA so needs the OOB buffer to be contiguous with the data, for both read
and write.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 17:48:58 +01:00
David Woodhouse
513b046c96 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-10-21 16:46:04 +01:00
Artem Bityutskiy
82810b7b6c [MTD] NAND: nandsim: support subpage write
As flash cannot do 0->1 bit transitions when programming, do not do this in
the simulator too. This makes nandsim able to accept subpage writes.

Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:44:23 +01:00
David Anders
a86aaa6ddf [MTD] NOR: leave Intel chips in read-array mode on suspend
During some testing with several samsung s3c24xx based
devices it was discovered that often the
cfi_cmdset_0001.c would not leave the chip in
read-array mode on suspend. this is an issue if the
same flash chip is used for the bootloader that needs
to be read on resume.

Signed-off-by: David Anders <danders@amltd.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:43:53 +01:00
Artem Bityutskiy
d29ebdbee4 [MTD] core: trivial comments fix
Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:42:53 +01:00
Vijay Kumar
a5602146c5 [MTD] NAND: nandsim coding style fix
Removes line break after return type in function definitions, to be
consistent with the Linux coding style.

Signed-off-by: Vijay Kumar <vijaykumar@bravegnu.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:40:55 +01:00
Vijay Kumar
d086d43640 [MTD] NAND: nandsim page-wise allocation (2/2)
For page wise allocation, an array of flash page pointers is allocated
during initialization. The flash pages are themselves allocated when a
write occurs to the page. The flash pages are deallocated when they
are erased.

Signed-off-by: Vijay Kumar <vijaykumar@bravegnu.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:40:27 +01:00
Vijay Kumar
47e3774338 [MTD] NAND: nandsim page-wise allocation (1/2)
This patch removes code that does chip mapping. The chip mapping code
is no longer used.

Signed-off-by: Vijay Kumar <vijaykumar@bravegnu.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:39:56 +01:00
Yoichi Yuasa
6652018c82 [MTD] MAPS: Remove ITE 8172G and Globespan IVR MTD support
This patch has removed ITE 8172G and Globespan IVR MTD support.
These boards support have already been removed.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Acked-by: Ralf Bächle <ralf@linux-mips.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:35:05 +01:00
Ricard Wanderlöf
d25ade71ef [MTD] mtdchar: Fix MEMGETOOBSEL and ECCGETLAYOUT ioctls
1. The ECCGETLAYOUT ioctl copy_to_user() call has a superfluous '&'
causing the resulting information to be garbage rather than the intended
mtd->ecclayout.

2. The MEMGETOOBSEL misses copying mtd->ecclayout->eccbytes so the
resulting field of the returned structure contains garbage.

Signed-off-by: Ricard Wanderlöf <ricardw@axis.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:33:17 +01:00
Andrew Victor
42cb1403af [MTD] NAND: AT91 NAND driver
This version only differs from version posted by Savin Zlobec (20 Jun
2006) in that the AT91RM9200-specific chip-select / bus setup code has
been moved from the at91_nand.c driver into the processor-specific file.

From: Savin Zlobec <savin@epico.si>
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:28:26 +01:00
Alan Cox
c7438d02b3 [MTD] MAPS: esb2rom: use hotplug safe interfaces
Fairly self explanatory.  Keep a reference initially, drop it when we free up
the driver resources.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:22:58 +01:00
Alexey Dobriyan
f33686b5a7 [MTD] JEDEC probe: fix comment typo (devic)
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:22:04 +01:00
Lew Glendenning
29175778b0 [MTD] MAPS: Support for BIOS flash chips on Intel ESB2 southbridge
Add MTD map driver for BIOS flash chips connected to the Intel ESB2
southbridge.

[akpm@osdl.org: coding-style fixes, build fix]
Signed-off-by: Ryan Jackson <rjackson@lnxi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:21:04 +01:00
Ryan Jackson
89072ef993 [MTD] CHIPS: Support for SST 49LF040B flash chip
Add chip driver and JEDEC probe support for the SST 49LF040B flash chip.

Signed-off-by: Ryan Jackson <rjackson@lnxi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:18:51 +01:00
Ryan Jackson
c9073ce02a [MTD] MAPS: Add parameter to amd76xrom to override rom window size
The 2 bits controlling the window size are often set to allow reading the
BIOS, but too small to allow writing, since the lock registers are 4MiB
lower in the address space than the data.  This is intended to prevent
flashing the bios, perhaps accidentally.

The bits are 6 and 7.  If both bits are set, it is a 5MiB window. If only
the 7 Bit is set, it is a 4MiB window.  Otherwise, it is a 64KiB window.

This parameter allows the driver to override the BIOS settings.

Signed-off-by: Ryan Jackson <rjackson@lnxi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-21 16:15:43 +01:00
David Woodhouse
8dd851de81 [MTD NAND] OLPC CAFÉ driver update
- Fix OOB handling, bad block table marker placement
- Some cleanups, enable runtime-optional debugging
- Allow BBT stuff to be skipped

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-20 02:11:40 +01:00
Al Viro
afc12d30a7 [PATCH] mtd: remove several bogus casts to void * in iounmap() argument
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-10 15:37:22 -07:00
Adrian Bunk
1ef93a0f66 [MTD] SSFDC must depend on BLOCK
This patch fixes the following compile error with
CONFIG_SSFDC=m, CONFIG_BLOCK=n:

<--  snip  -->

...
  CC [M]  drivers/mtd/mtd_blkdevs.o
/home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:40: warning: ‘struct request’ declared inside parameter list
/home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:40: warning: its scope is only this definition or declaration, which is probably not what you want
/home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c: In function ‘do_blktrans_request’:
/home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:45: error: dereferencing pointer to incomplete type
...
make[3]: *** [drivers/mtd/mtd_blkdevs.o] Error 1

<--  snip  -->

Bug report by Jesper Juhl.

This patch also removes a pointless "default n" from the SSFDC option.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-09 07:25:28 +01:00
David Woodhouse
5467fb0255 [MTD NAND] Initial import of CAFÉ NAND driver.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-06 15:36:29 +01:00
Uwe Zeisberger
f30c226954 fix file specification in comments
Many files include the filename at the beginning, serveral used a wrong one.

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03 23:01:26 +02:00
Matt LaPlante
095096038d Fix several typos in drivers/
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03 22:31:37 +02:00
Amol Lad
76a5027c37 [MTD] Cleanup of 'ioremap balanced with iounmap for drivers/mtd subsystem'
Updated version of patch, in response to comments from Francois Romieu
<romieu@fr.zoreil.com>

Remove gratuitous casts from iounmap and initialisation of variables.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-02 09:48:23 +01:00
Frederik Deweerdt
553a801208 [MTD] fix nftl_write warning
Building 2.6.18-mm2 issues the following warning if CONFIG_NFTL_RW is not set:

  CC [M]  drivers/mtd/nftlcore.o
drivers/mtd/nftlcore.c:183: warning: 'nftl_write' defined but not used
The following patch only compiles nftl_write if CONFIG_NFTL_RW is set.

Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-02 09:42:25 +01:00
Jeff Garzik
9a29230825 [MTD] fix printk warning
gcc spits out this warning:

drivers/mtd/mtd_blkdevs.c: In function ‘do_blktrans_request’:
drivers/mtd/mtd_blkdevs.c:72: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘unsigned int’

This could be fixed any number of ways, including use of BUG().
rq_data_dir() only returns 0 or 1, so this entire case is superfluous.
I did the most simple fix.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-01 17:57:26 +01:00
David Woodhouse
8a84fc15ae Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Manually resolve conflict in include/mtd/Kbuild

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-10-01 17:55:53 +01:00
David Howells
9361401eb7 [PATCH] BLOCK: Make it possible to disable the block layer [try #6]
Make it possible to disable the block layer.  Not all embedded devices require
it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
the block layer to be present.

This patch does the following:

 (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
     support.

 (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
     an item that uses the block layer.  This includes:

     (*) Block I/O tracing.

     (*) Disk partition code.

     (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.

     (*) The SCSI layer.  As far as I can tell, even SCSI chardevs use the
     	 block layer to do scheduling.  Some drivers that use SCSI facilities -
     	 such as USB storage - end up disabled indirectly from this.

     (*) Various block-based device drivers, such as IDE and the old CDROM
     	 drivers.

     (*) MTD blockdev handling and FTL.

     (*) JFFS - which uses set_bdev_super(), something it could avoid doing by
     	 taking a leaf out of JFFS2's book.

 (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
     linux/elevator.h contingent on CONFIG_BLOCK being set.  sector_div() is,
     however, still used in places, and so is still available.

 (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
     parts of linux/fs.h.

 (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.

 (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.

 (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
     is not enabled.

 (*) fs/no-block.c is created to hold out-of-line stubs and things that are
     required when CONFIG_BLOCK is not set:

     (*) Default blockdev file operations (to give error ENODEV on opening).

 (*) Makes some /proc changes:

     (*) /proc/devices does not list any blockdevs.

     (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.

 (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.

 (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
     given command other than Q_SYNC or if a special device is specified.

 (*) In init/do_mounts.c, no reference is made to the blockdev routines if
     CONFIG_BLOCK is not defined.  This does not prohibit NFS roots or JFFS2.

 (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
     error ENOSYS by way of cond_syscall if so).

 (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
     CONFIG_BLOCK is not set, since they can't then happen.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:52:31 +02:00
Jens Axboe
4aff5e2333 [PATCH] Split struct request ->flags into two parts
Right now ->flags is a bit of a mess: some are request types, and
others are just modifiers. Clean this up by splitting it into
->cmd_type and ->cmd_flags. This allows introduction of generic
Linux block message types, useful for sending generic Linux commands
to block devices.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-09-30 20:23:37 +02:00
Kyungmin Park
28b79ff966 [MTD ONENAND] Check OneNAND lock scheme & all block unlock command support
OneNAND lock scheme depends on density and process of chip.
Some OneNAND chips support all block unlock

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-26 16:46:28 +01:00
Kyungmin Park
98638ee2ed [MTD ONENAND] Remove unused MTD_ONENAND_SYNC_READ configuration
Now the bootloader configures the OneNAND sync. burst mode.
So we don't access Sync. burst mode related registers in kernel.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-26 10:02:37 +01:00
Kyungmin Park
47e777e02e [MTD ONENAND] Fix OneNAND probe
- fix OneNAND probe whether OneNAND Sync. Burst read mode or not
        - fix OneNAND reset wait problem

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-26 09:16:06 +01:00
David Woodhouse
956e944c76 [MTD NAND] Allow override of page read and write functions.
- allow high-level nand_write_page() function to be overridden
- likewise low-level write_page_raw() and read_page_raw() functions
- Clean up the abuse of chip->ecc.{write,read}_page() with MTD_OOB_RAW

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-25 17:12:39 +01:00
David Woodhouse
4bf63fcb83 [MTD NAND] Allocate chip->buffers separately to allow it to be overridden
In particular, the board driver might need it to be DMAable.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-25 17:08:04 +01:00
David Woodhouse
3b85c3211e [MTD NAND] Split nand_scan() into two parts; allow board driver to intervene
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-25 17:06:53 +01:00
David Woodhouse
4b648b0253 [MTD NAND] Export nand_wait_ready() for use by board drivers
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-25 17:05:24 +01:00
David Woodhouse
08d3ad6a51 [MTD] Whitespace cleanup in SSFDC driver.
Says akpm: ' - search for "( " and " )", fix.'

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-23 16:20:48 +01:00
David Woodhouse
9a05eded5d [MTD] SSFDC translation layer minor cleanup
Don't include <linux/config.h>.
Don't say 'MB' where you mean 'MiB'.
Don't allocate 512 bytes on the stack.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-23 10:56:24 +01:00
David Woodhouse
892e4fba1c [MTD] Fix dependencies with CONFIG_MTD=m
CMDLINEPARTS shouldn't be selectable, and neither should SSFDC, which
can be a tristate anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-23 10:24:36 +01:00
David Woodhouse
e4e3295f0c Revert "[MTD] blkdev helper code: fix printk format warning"
This reverts commit 668040fcd1.

The 'flags' field of the struct request is 'unsigned long'. Quite
how Randy came to see 'long int format, different type arg' I don't
know, but it doesn't seem to be the case any more.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 11:05:42 +01:00
Claudio Lanconelli
51197abf29 [MTD] Add SSFDC (SmartMedia) read-only translation layer
Signed-off-by: Claudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 11:01:37 +01:00
Jiri Slaby
98aacdfde0 [MTD] pmc551 pci cleanup
Use pci_resource_start for getting start of regions and pci_iomap to not
doing this directly by using dev->resource... (Thanks to Rolf Eike Beer)

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:34:15 +01:00
Jiri Slaby
7fefb924d7 [MTD] pmc551 use kzalloc
Use kzalloc instad of kmalloc+memset(0).

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:33:52 +01:00
Jiri Slaby
cdf0a7d169 [MTD] pmc551 whitespace cleanup
Spaces were used for indent, there was more than 80 columns per line. Get
rid of that stuff.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:33:31 +01:00
Lennert Buytenhek
e417fcfb85 [MTD] Remove iq80310 map driver
The iq80310 mtd map driver depends on ARCH_IQ80310, which isn't
defined anywhere in the tree (as we don't have 80310 support), and
furthermore, everything the driver does can be done with physmap
instead.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:31:01 +01:00
Frank Haverkamp
6a545a0d60 [MTD NAND] Fix in typo ndfc.c causing wrong ECC layout
Due to this typo, a wrong ECC layout table is chosen.

Signed-off-by: Frank Haverkamp <haver@vnet.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:30:25 +01:00
Lennert Buytenhek
17c2dae3aa [MTD] physmap: add power management support
Implement PM handling for physmap.  Idea from Steven Scholz, patch
by David Anders.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:26:56 +01:00
Amol Lad
25f0c659fe ioremap balanced with iounmap for drivers/mtd subsystem
ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Tested (compilation only) with:
- allmodconfig
- Modifying drivers/mtd/maps/Kconfig and drivers/mtd/nand/Kconfig to
make sure that the changed file is compiling without warning

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:24:31 +01:00
Alan Cox
dd8e9ed6ed [MTD] Switch to pci_get_device and do ref counting
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:19:20 +01:00
Randy Dunlap
668040fcd1 [MTD] blkdev helper code: fix printk format warning
Fix printk format warning(s):
drivers/mtd/mtd_blkdevs.c:72: warning: long int format, different type arg (arg 2)

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:17:28 +01:00
Brian Walsh
f40a6f1cc7 [MTD] Fix ixp4xx partition parsing.
If the amount of flash is not divisible by 2 then the mask in
parse_mtd_partitions would fail to work as designed.  Passing in the base
address corrects this problem.

Signed-off-by: Brian Walsh <brian@walsh.ws>
Cc: Deepak Sanexa <dsanexa@mvista.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:16:16 +01:00
Michal Piotrowski
cbc88ba83f [MTD NAND] Remove old code in au1550nd.c
Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:09:44 +01:00
Håvard Skinnemoen
187ef15268 [MTD] Unlock NOR flash automatically where necessary
Introduce the MTD_STUPID_LOCK flag which indicates that the flash chip is
always locked after power-up, so all sectors need to be unlocked before it
is usable.

If this flag is set, and the chip provides an unlock() operation,
mtd_add_device will unlock the whole MTD device if it's writeable.  This
means that non-writeable partitions will stay locked.

Set MTD_STUPID_LOCK in fixup_use_atmel_lock() so that these chips will work
as expected.

Signed-off-by: Håvard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-22 10:07:08 +01:00
Josef 'Jeff' Sipek
ea59830db0 [MTD] Use SEEK_{SET,CUR,END} instead of hardcoded values in mtdchar lseek()
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-17 17:04:23 +01:00
Håvard Skinnemoen
de591dacf3 MTD: Fix bug in fixup_convert_atmel_pri
The memset() in fixup_convert_atmel_pri is supposed to zero out
everything except the first 5 bytes in *extp, but it ends up zeroing
out something way outside the struct instead. Fix this potentially
dangerous code by casting the pointer to char * before doing
arithmetic.

Signed-off-by: Håvard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-09-16 13:54:17 +01:00
Aubrey Lee
fa6c220a7f [PATCH] [MTD] DEVICES: Fill more device IDs in the structure of m25p80
The flash_info structure has a bunch of missing fields which causes problems
when actually tryin to use some ST parts as it gets detected incorrectly.

Signed-off-by: Aubrey L1 <aubreylee@gmail.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
2006-09-05 05:55:07 -05:00
David Woodhouse
0a7d5f8ce9 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-08-30 23:30:38 +01:00
Jonathan McDowell
fb8d81e477 [PATCH] MTD NAND: Fix ams-delta after core conversion
The recent hwctrl core conversion for MTD NAND devices broke the Amstrad
Delta driver.  This fixes it up and uses the existing control line defines
rather than unclear magic numbers.

Signed-off-by: Jonathan McDowell <noodles@earth.li>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-08-27 11:01:30 -07:00
Richard Purdie
7fd5aecc5d [PATCH] mtd corruption fix
Read the return value before we release the nand device otherwise the
value can become corrupted by another user of chip->ops, ultimately
resulting in filesystem corruption.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-08-27 11:01:29 -07:00
Haavard Skinnemoen
0165508c80 MTD: Add lock/unlock operations for Atmel AT49BV6416
The AT49BV6416 is locked by default, so we really need to provide
at least the unlock() operation for write and erase to work. This
patch implements both ->lock() and ->unlock() and provides a fixup
to install them when an AT49BV6416 chip is detected.

These functions are probably valid on more Atmel chips, but I believe
it's mostly obsolete ones. The AT49BV6416 is in fact obsolete, but
it's used on all current AT32STK1000 development boards.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
2006-08-16 20:16:43 -05:00
Haavard Skinnemoen
5b0c5c2c0d MTD: Convert Atmel PRI information to AMD format
Atmel flash chips don't have PRI information in the same format as
AMD flash chips. This patch installs a fixup for all Atmel chips that
converts the relevant PRI fields into AMD format.

Only the fields that are actually used by the command set is actually
converted. The rest are initialized to zero (which should be safe)

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
2006-08-16 20:13:06 -05:00
Takashi YOSHII
79b9cd586f [PATCH] [MTD] Maps: Add dependency on alternate probe methods to physmap
map/physmap.c tries to probe "cfi_probe", "jedec_probe" and "map_rom", but
map/Kconfig says it depends on MTD_CFI only.
This patch adds  MTD_JEDECPROBE and MTD_ROM to the dependency condition.

Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
2006-08-15 07:26:32 -05:00
Takashi YOSHI
c4e6952ffd [PATCH] MTD: Add Macronix MX29F040 to JEDEC
Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
2006-08-14 19:48:30 -05:00
Alexey Korolev
46a1652c28 [MTD] Fixes of performance and stability issues in CFI driver.
Fix of performance and stability issues on Intel NOR chips. It fixes:

1. Very low write performance on Sibley (perf tests demonstrated write
   performance less than 100Kb/sec when it should be over 400Kb/sec).

2. Low erase performance. (perf tests on Sibleuy demonstrated erase
   performance 246Kb/sec when it should be over 300Kb/sec).

3. Error on JFFS2 tests with CPU loading application when MTD returns
   "block erase error: (status timeout)" To fix the issue it does the
   following:
     1. Removes the timeout tuning from inval_cache_and_wait_for_operation.
     2. Waiting conditions in inval_cache_and_wait_for_operation now is
         based on timer resolution
        If timeout is lower than timer resolution then we do in cycle
	  "Checking the status"
	  udelay(1);
	  cond_resched();
        If timeout is greater than timer resolution (probably erase
        operation) We do the following
	  sleep for half of operation timeout and do in cycle the following
	    "Checking the status"
	    sleep for timer resolution

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-15 13:43:59 +01:00
Ville Herva
c4e7fb3137 block2mtd.c: Make kernel boot command line arguments work (try 4)
Trying to pass kernel command line arguments to block2mtd at boot-time does
not work currently. block2mtd_setup() is called so early that kmalloc()
fails nevermind being able to do open_bdev_excl() (which requires rootfs to
be mounted. This patch only saves the option string at the early boot stage,
and parses them later when block2mtd_init() is called. If open_bdev_excl()
fails, open_by_devnum(name_to_dev_t()) is tried instead, which makes it
possible to initialize the driver before rootfs has been mounted. Also gets
rid of the superfluous parse_name() that only checks if name is longer than
80 chars and copies it to a string that is not kfreed.

With this patch, I can boot statically compiled block2mtd, and mount jffs2
as rootfs (without modules or initrd), with lilo config like this:

   root=/dev/mtdblock0
   append="rootfstype=jffs2 block2mtd.block2mtd=/dev/hdc2,65536"

(Note that rootfstype=jffs2 is required, since the kernel only tries
filesystems without "nodev" attribute by default, and jffs is "nodev").

Compared to first version of this patch, this one does not copy the
parameters to the global buffer if init has already been called, and the
global array is marked as __initdata.

Compared to the second version of this patch, module build is fixed.

Compared to the third version of this patch, statically compiled block2mtd
driver with no boot-time parameter no longer gives spurious error 'cannot
open device ""'

Signed-off-by: Ville Herva <vherva@vianova.fi>
Acked-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-15 13:39:10 +01:00
David Woodhouse
9a909867d2 [MTD NAND] Fix lookup error in nand_get_flash_type()
Spotted by liyu <liyu@ccoss.com.cn>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-15 13:26:18 +01:00
Rolf Eike Beer
9d05cd5178 remove #error on !PCI from pmc551.c
PMC551 depends on PCI in Kconfig so there is no need to #error in code if PCI
is not set.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-15 13:19:55 +01:00
Richard Purdie
6a5a297cf7 MTD: [NAND] Fix the sharpsl driver after breakage from a core conversion
The CNE bits are inverted on the device and writeb function is missing a
NOT operation.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-15 13:19:24 +01:00
Vitaly Wool
8b0036eefd [MTD] NAND: OOB buffer offset fixups
In the case of data-pad-ecc-pad-data... layout the oob start position
has to be sizeof(data) in nand_write_oob_syndrom().

In nand_fill_oob() we need to copy to buf + buffer offset instead of
buf + write offset.

From: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-07-11 09:11:25 +02:00
Artem B. Bityutskiy
220b0f5755 [PATCH] [MTD] NAND: fix dead URL in Kconfig
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
2006-07-05 14:45:11 +01:00
Linus Torvalds
0d1782144e Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [JFFS2][XATTR] Fix memory leak in POSIX-ACL support
  fs/jffs2/: make 2 functions static
  [MTD] NAND: Fix broken sharpsl driver
  [JFFS2][XATTR] Fix xd->refcnt race condition
  MTD: kernel-doc fixes + additions
  MTD: fix all kernel-doc warnings
  [MTD] DOC: Fixup read functions and do a little cleanup
2006-07-03 21:29:08 -07:00
Jörn Engel
6ab3d5624e Remove obsolete #include <linux/config.h>
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00
Thomas Gleixner
27a288677d [MTD] NAND: Fix broken sharpsl driver
Remove the not longer supported NO_VIRTBLOCKS flag and remove
an unused variable while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-29 21:25:10 +02:00
Linus Torvalds
1903ac54f8 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6:
  [PATCH] i386: export memory more than 4G through /proc/iomem
  [PATCH] 64bit Resource: finally enable 64bit resource sizes
  [PATCH] 64bit Resource: convert a few remaining drivers to use resource_size_t where needed
  [PATCH] 64bit resource: change pnp core to use resource_size_t
  [PATCH] 64bit resource: change pci core and arch code to use resource_size_t
  [PATCH] 64bit resource: change resource core to use resource_size_t
  [PATCH] 64bit resource: introduce resource_size_t for the start and end of struct resource
  [PATCH] 64bit resource: fix up printks for resources in misc drivers
  [PATCH] 64bit resource: fix up printks for resources in arch and core code
  [PATCH] 64bit resource: fix up printks for resources in pcmcia drivers
  [PATCH] 64bit resource: fix up printks for resources in video drivers
  [PATCH] 64bit resource: fix up printks for resources in ide drivers
  [PATCH] 64bit resource: fix up printks for resources in mtd drivers
  [PATCH] 64bit resource: fix up printks for resources in pci core and hotplug drivers
  [PATCH] 64bit resource: fix up printks for resources in networks drivers
  [PATCH] 64bit resource: fix up printks for resources in sound drivers
  [PATCH] 64bit resource: C99 changes for struct resource declarations

Fixed up trivial conflict in drivers/ide/pci/cmd64x.c (the printk that
was changed by the 64-bit resources had been deleted in the meantime ;)
2006-06-29 10:49:17 -07:00
Randy Dunlap
844d3b427e MTD: fix all kernel-doc warnings
Fix all kernel-doc warnings in MTD headers and source files:
- add some missing struct fields;
- correct some function parameter names;
- use kernel-doc format for function doc. headers;
- nand_ecc.c contains only exported interfaces, no internal ones;

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-29 08:55:00 +01:00
Thomas Gleixner
7f8a894066 [MTD] DOC: Fixup read functions and do a little cleanup
The NAND rework resulted in non ECC based reads. Fix it up and
do a bit of cleanup while at it.

Pointed out by Adrian Bunk.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-28 10:11:33 +02:00
Linus Torvalds
936813a880 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [MTD] NAND: Select chip before checking write protect status
  [MTD] CORE mtdchar.c: fix off-by-one error in lseek()
  [MTD] NAND: Fix typo in mtd/nand/ts7250.c
  [JFFS2][XATTR] coexistence between xattr and write buffering support.
  [JFFS2][XATTR] Fix wrong copyright
  [JFFS2][XATTR] Re-define xd->refcnt as atomic_t
  [JFFS2][XATTR] Fix memory leak with jffs2_xattr_ref
  [JFFS2][XATTR] rid unnecessary writing of delete marker.
  [JFFS2][XATTR] Fix ACL bug when updating null xattr by null ACL.
  [JFFS2][XATTR] using 'delete marker' for xdatum/xref deletion
  [MTD] Fix off-by-one error in physmap.c
  [MTD] Remove unused 'nr_banks' variable from ixp2000 map driver
  [MTD NAND] s3c2412 support in s3c2410.c
  [MTD] Initialize 'writesize'
  [MTD] NAND: ndfc fix address offset thinko
  [MTD] NAND: S3C2410 convert prinks to dev_*()s
  [MTD] NAND: Missing fixups
2006-06-27 19:13:56 -07:00
Thomas Gleixner
6a93096195 [MTD] NAND: Select chip before checking write protect status
The other way round works not really well with boards which have a
static NAND chipselect.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 23:24:09 +01:00
Herbert Valerio Riedel
1887f517e3 [MTD] CORE mtdchar.c: fix off-by-one error in lseek()
Allow lseek(mtdchar_fd, 0, SEEK_END) to succeed, which currently fails
with EINVAL.

lseek(fd, 0, SEEK_END) should result into the same fileposition as
lseek(fd, 0, SEEK_SET) + read(fd, buf, length(fd))

Furthermore, lseek(fd, 0, SEEK_CUR) should return the current file position,
which in case of an encountered EOF should not result in EINVAL

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 23:22:07 +01:00
Petr Stetiar
0e4ced59de [MTD] NAND: Fix typo in mtd/nand/ts7250.c
I was unable to compile ts7250.c after your refactor commit,
it's a typo probably.

-- ynezz

From: Petr Stetiar <ynezz@true.cz>
Signed-off-by: Thomas Gleixner  <tglx@linutronix.de>
2006-06-27 23:20:48 +01:00
Greg Kroah-Hartman
176dfc633b [PATCH] 64bit resource: fix up printks for resources in mtd drivers
This is needed if we wish to change the size of the resource structures.

Based on an original patch from Vivek Goyal <vgoyal@in.ibm.com>

Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-06-27 09:23:58 -07:00
Sascha Hauer
6d4f8224d4 [MTD] Fix off-by-one error in physmap.c
This patch fixes a simple off-by-one error in the mtd physmap driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 14:38:15 +01:00
Lennert Buytenhek
ce5b0968b1 [MTD] Remove unused 'nr_banks' variable from ixp2000 map driver
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 14:36:20 +01:00
Ben Dooks
2c06a08217 [MTD NAND] s3c2412 support in s3c2410.c
Add support for both the S3C2412 and S3C2412 Samsung SoCs to
the increasingly mis-named s3c2410.c driver.

This currently only supports SLC ECCs, and a chip on nFCE0.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 14:35:46 +01:00
Linus Torvalds
2a2ed2db35 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (40 commits)
  kbuild: trivial fixes in Makefile
  kbuild: adding symbols in Kconfig and defconfig to TAGS
  kbuild: replace abort() with exit(1)
  kbuild: support for %.symtypes files
  kbuild: fix silentoldconfig recursion
  kbuild: add option for stripping modules while installing them
  kbuild: kill some false positives from modpost
  kbuild: export-symbol usage report generator
  kbuild: fix make -rR breakage
  kbuild: append -dirty for updated but uncommited changes
  kbuild: append git revision for all untagged commits
  kbuild: fix module.symvers parsing in modpost
  kbuild: ignore make's built-in rules & variables
  kbuild: bugfix with initramfs
  kbuild: modpost build fix
  kbuild: check license compatibility when building modules
  kbuild: export-type enhancement to modpost.c
  kbuild: add dependency on kernel.release to the package targets
  kbuild: `make kernelrelease' speedup
  kconfig: KCONFIG_OVERWRITECONFIG
  ...
2006-06-26 11:05:15 -07:00
David S. Miller
29f7ac7ecc [MTD] sun_uflash: Port to new EBUS device layer.
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-25 23:14:51 -07:00
Artem B. Bityutskiy
17ffc7ba6d [MTD] Initialize 'writesize'
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
2006-06-22 18:15:48 +04:00
Thomas Gleixner
1794c13002 [MTD] NAND: ndfc fix address offset thinko
The rework of the command handling in the nand driver
led to wrong address setting in the command control
function. Use the correct address again.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-22 13:06:43 +02:00
Ben Dooks
99974c62b6 [MTD] NAND: S3C2410 convert prinks to dev_*()s
Convert the use of printk() to the correct dev_info/dev_err
functions

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-21 18:56:34 +02:00
Savin Zlobec
0d420f9d61 [MTD] NAND: Missing fixups
The oob fixups broke a return value and missed one patch from
the Mailing List.

Signed-off-by: Savin Zlobec <savin@epico.si>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-21 13:11:56 +01:00
Thomas Gleixner
7bc3312bef [MTD] NAND: Fix breakage all over the place
Following problems are addressed:

- wrong status caused early break out of nand_wait()
- removed the bogus status check in nand_wait() which
  is a relict of the abandoned support for interrupted
  erase.
- status check moved to the correct place in read_oob
- oob support for syndrom based ecc with strange layouts
- use given offset in the AUTOOOB based oob operations

Partially based on a patch from Vitaly Vool <vwool@ru.mvista.com>
Thanks to Savin Zlobec <savin@epico.si> for tracking down the
status problem.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-20 20:31:24 +01:00
Vitaly Wool
7e4178f90e [PATCH] NAND: fix remaining OOB length calculation
In nand_read_page_syndrome/nand_write_page_syndrome the calculation of
the remaining oob length which is not used by the prepad/ecc/postpad
areas is wrong.

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-20 20:31:23 +01:00
Thomas Gleixner
b6d5ee00e3 [MTD] NAND Fixup NDFC merge brokeness
Remove the remains of a broken merge.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-06-20 20:31:23 +01:00
Ben Dooks
ad3b5fb772 [MTD NAND] S3C2410 driver cleanup
Fix unused variables and commenting since tglx's
new NAND updates

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-19 09:43:23 +01:00
Ben Dooks
d1fef3c5e1 [MTD NAND] s3c24x0 board: Fix clock handling, ensure proper initialisation.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-19 09:29:38 +01:00
David Woodhouse
21c8db9eff [MTD] Restore MTD_ROM and MTD_RAM types
Let's not attempt the abolition of mtd->type until/unless it's properly
thought through. And certainly, let's not do it by halves.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-14 21:39:48 +01:00
Artem B. Bityutskiy
783ed81ff3 [MTD] assume mtd->writesize is 1 for NOR flashes
Signed-off-by: Artem B. Bityitskiy
2006-06-14 19:53:44 +04:00
David Woodhouse
f9068876f5 [MTD NAND] Fix s3c2410 NAND driver so it at least _looks_ like it compiles
Fix the control bit handling so it even looks like it might work, too.
Bad tglx. No biscuit.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-10 00:53:16 +01:00
Roman Zippel
e55a3e8aed kconfig: remove leading whitespace in menu prompts
This removes all the leading whitespace kconfig now warns about.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2006-06-09 16:28:07 +02:00
Andrew Morton
f24ff6bf8c [MTD] Prepare physmap for 64-bit-resources
Fallout from the incoming 64-bit-resource stuff:

drivers/mtd/maps/physmap.c: In function 'physmap_flash_probe':
drivers/mtd/maps/physmap.c:94: warning: format '%.8lx' expects type 'long
unsigned int', but argument 2 has type 'resource_size_t'
drivers/mtd/maps/physmap.c:94: warning: format '%.8lx' expects type 'long
unsigned int', but argument 3 has type 'resource_size_t'

Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-09 15:12:34 +01:00
Joern Engel
73c619ea0e [MTD] Disconnect struct mtd_info from ABI
mtdchar.c direcly copied part of struct mtd_info to userspace, thereby
implicitly making it part of the ABI.  With this patch, struct
mtd_info is independent of the ABI and can have its fields removed,
reordered, etc.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-30 14:25:35 +02:00
Joern Engel
92cbfdcc36 [MTD] replace MTD_RAM with MTD_GENERIC_TYPE
Ram devices get the extra capability of MTD_NO_ERASE - not requiring
an explicit erase before writing to it.  Currently only mtdblock uses
this capability.  Rest of the patch is a simple text replacement.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-30 14:25:24 +02:00
Joern Engel
e369d62e92 [MTD] replace MTD_ROM with MTD_GENERIC_TYPE
No mtd user should ever check for the device type.  Instead, device features
should be checked by the flags - if at all.
As a first step towards type removal, change MTD_ROM into MTD_GENERIC_TYPE.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-30 14:25:17 +02:00
Joern Engel
e1219724be [MTD] remove a forgotten MTD_XIP
MTD_XIP definition was removed in an earlier patch.  This invocation
was left by mistake.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-30 14:25:05 +02:00
Andrew Morton
7e9a0bb00c [MTD] Fix build warnings (and debug build error) in nand_base.c
drivers/mtd/nand/nand_base.c: In function 'nand_transfer_oob':
drivers/mtd/nand/nand_base.c:909: warning: comparison of distinct pointer types lacks a cast
drivers/mtd/nand/nand_base.c: In function 'nand_do_read_oob':
drivers/mtd/nand/nand_base.c:1097: error: 'len' undeclared (first use in this function)
drivers/mtd/nand/nand_base.c:1097: error: (Each undeclared identifier is reported only once
drivers/mtd/nand/nand_base.c:1097: error: for each function it appears in.)
drivers/mtd/nand/nand_base.c: In function 'nand_fill_oob':
drivers/mtd/nand/nand_base.c:1411: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-30 09:06:41 +01:00
Thomas Gleixner
f1a28c0284 [MTD] NAND Expose the new raw mode function and status info to userspace
The raw read/write access to NAND (without ECC) has been changed in the
NAND rework. Expose the new way - setting the file mode via ioctl - to
userspace. Also allow to read out the ecc statistics information so userspace
tools can see that bitflips happened and whether errors where correctable
or not. Also expose the number of bad blocks for the partition, so nandwrite
can check if the data fits into the parition before writing to it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-30 00:37:34 +02:00
Thomas Gleixner
9a1fcdfd4b [MTD] NAND Signal that a bitflip was corrected by ECC
Return -EUCLEAN on read when a bitflip was detected and corrected, so the
clients can react and eventually copy the affected block to a spare one.
Make all in kernel users aware of the change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:51 +02:00
Thomas Gleixner
8593fbc68b [MTD] Rework the out of band handling completely
Hopefully the last iteration on this!

The handling of out of band data on NAND was accompanied by tons of fruitless
discussions and halfarsed patches to make it work for a particular
problem. Sufficiently annoyed by I all those "I know it better" mails and the
resonable amount of discarded "it solves my problem" patches, I finally decided
to go for the big rework. After removing the _ecc variants of mtd read/write
functions the solution to satisfy the various requirements was to refactor the
read/write _oob functions in mtd.

The major change is that read/write_oob now takes a pointer to an operation
descriptor structure "struct mtd_oob_ops".instead of having a function with at
least seven arguments.

read/write_oob which should probably renamed to a more descriptive name, can do
the following tasks:

- read/write out of band data
- read/write data content and out of band data
- read/write raw data content and out of band data (ecc disabled)

struct mtd_oob_ops has a mode field, which determines the oob handling mode.

Aside of the MTD_OOB_RAW mode, which is intended to be especially for
diagnostic purposes and some internal functions e.g. bad block table creation,
the other two modes are for mtd clients:

MTD_OOB_PLACE puts/gets the given oob data exactly to/from the place which is
described by the ooboffs and ooblen fields of the mtd_oob_ops strcuture. It's
up to the caller to make sure that the byte positions are not used by the ECC
placement algorithms.

MTD_OOB_AUTO puts/gets the given oob data automaticaly to/from the places in
the out of band area which are described by the oobfree tuples in the ecclayout
data structre which is associated to the devicee.

The decision whether data plus oob or oob only handling is done depends on the
setting of the datbuf member of the data structure. When datbuf == NULL then
the internal read/write_oob functions are selected, otherwise the read/write
data routines are invoked.

Tested on a few platforms with all variants. Please be aware of possible
regressions for your particular device / application scenario

Disclaimer: Any whining will be ignored from those who just contributed "hot
air blurb" and never sat down to tackle the underlying problem of the mess in
the NAND driver grown over time and the big chunk of work to fix up the
existing users. The problem was not the holiness of the existing MTD
interfaces. The problems was the lack of time to go for the big overhaul. It's
easy to add more mess to the existing one, but it takes alot of effort to go
for a real solution.

Improvements and bugfixes are welcome!

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:51 +02:00
Thomas Gleixner
f4a43cfcec [MTD] Remove silly MTD_WRITE/READ macros
Most of those macros are unused and the used ones just obfuscate
the code. Remove them and fixup all users.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:50 +02:00
Thomas Gleixner
5bd34c091a [MTD] NAND Replace oobinfo by ecclayout
The nand_oobinfo structure is not fitting the newer error correction
demands anymore. Replace it by struct nand_ecclayout and fixup the users
all over the place. Keep the nand_oobinfo based ioctl for user space
compability reasons.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:50 +02:00
Thomas Gleixner
ff268fb879 [MTD] NAND Consolidate oobinfo handling
The info structure for out of band data was copied into
the mtd structure. Make it a pointer and remove the ability
to set it from userspace. The position of ecc bytes is
defined by the hardware and should not be changed by software.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:49 +02:00
Thomas Gleixner
8be834f762 [MTD] NAND Fix platform structure and NDFC driver
The platform structure was lacking an oobinfo field.
The NDFC driver had some remains from another tree.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-29 15:06:49 +02:00
Andrew Morton
19676ff0a6 [MTD] Fix debug printk format warning in m25p80 SPI chip driver, again.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-29 11:33:33 +01:00
David Woodhouse
33280eac70 [MTD] AMD Geode NAND support can depend on X86_32; we won't see it on x86_64
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-29 11:24:29 +01:00
Thomas Gleixner
ba0251fe87 [MTD] NAND Consolidate references and add back default name setting
We have a type pointer. Make use of it instead of the error prone nand_ids[i]
reference.

The NAND driver used to set default name settings from the chip ID
string for the device. The feature got lost during the rework. Add it back.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-27 01:02:13 +02:00