Commit graph

2315 commits

Author SHA1 Message Date
Linus Torvalds
b4a45f5fe8 Merge branch 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin
* 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin: (57 commits)
  fs: scale mntget/mntput
  fs: rename vfsmount counter helpers
  fs: implement faster dentry memcmp
  fs: prefetch inode data in dcache lookup
  fs: improve scalability of pseudo filesystems
  fs: dcache per-inode inode alias locking
  fs: dcache per-bucket dcache hash locking
  bit_spinlock: add required includes
  kernel: add bl_list
  xfs: provide simple rcu-walk ACL implementation
  btrfs: provide simple rcu-walk ACL implementation
  ext2,3,4: provide simple rcu-walk ACL implementation
  fs: provide simple rcu-walk generic_check_acl implementation
  fs: provide rcu-walk aware permission i_ops
  fs: rcu-walk aware d_revalidate method
  fs: cache optimise dentry and inode for rcu-walk
  fs: dcache reduce branches in lookup path
  fs: dcache remove d_mounted
  fs: fs_struct use seqlock
  fs: rcu-walk for path lookup
  ...
2011-01-07 08:56:33 -08:00
Nick Piggin
b3e19d924b fs: scale mntget/mntput
The problem that this patch aims to fix is vfsmount refcounting scalability.
We need to take a reference on the vfsmount for every successful path lookup,
which often go to the same mount point.

The fundamental difficulty is that a "simple" reference count can never be made
scalable, because any time a reference is dropped, we must check whether that
was the last reference. To do that requires communication with all other CPUs
that may have taken a reference count.

We can make refcounts more scalable in a couple of ways, involving keeping
distributed counters, and checking for the global-zero condition less
frequently.

- check the global sum once every interval (this will delay zero detection
  for some interval, so it's probably a showstopper for vfsmounts).

- keep a local count and only taking the global sum when local reaches 0 (this
  is difficult for vfsmounts, because we can't hold preempt off for the life of
  a reference, so a counter would need to be per-thread or tied strongly to a
  particular CPU which requires more locking).

- keep a local difference of increments and decrements, which allows us to sum
  the total difference and hence find the refcount when summing all CPUs. Then,
  keep a single integer "long" refcount for slow and long lasting references,
  and only take the global sum of local counters when the long refcount is 0.

This last scheme is what I implemented here. Attached mounts and process root
and working directory references are "long" references, and everything else is
a short reference.

This allows scalable vfsmount references during path walking over mounted
subtrees and unattached (lazy umounted) mounts with processes still running
in them.

This results in one fewer atomic op in the fastpath: mntget is now just a
per-CPU inc, rather than an atomic inc; and mntput just requires a spinlock
and non-atomic decrement in the common case. However code is otherwise bigger
and heavier, so single threaded performance is basically a wash.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:33 +11:00
Adrian Hunter
4931445b94 OMAP2/3: OneNAND: add 104MHz support
Add GPMC timings for 104MHz OneNAND.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-21 12:05:34 -08:00
Linus Torvalds
ec5d043f28 Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  OMAP2: PRCM: fix some SHIFT macros that were actually bitmasks
  OMAP2+: PM/serial: fix console semaphore acquire during suspend
  OMAP1: SRAM: fix size for OMAP1611 SoCs
  arm: omap2: io: fix clk_get() error check
  arm: plat-omap: counter_32k: use IS_ERR() instead of NULL check
  omap: nand: remove hardware ECC as default
  omap: zoom: wl1271 slot is MMC_CAP_POWER_OFF_CARD
  omap: PM debug: fix wake-on-timer debugfs dependency
2010-12-14 17:36:35 -08:00
Russell King
819c1a651f Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 2010-12-12 23:45:39 +00:00
Sukumar Ghorai
859158bfab omap: nand: remove hardware ECC as default
Commit 2c01946c6b (omap3 nand: cleanup
virtual address usages) wrongly enabled CONFIG_MTD_NAND_OMAP_HWECC
which breaks boards like beagle and pandora that use software ECC
for write.

Boards like beagle and pandora uses sw ecc for write (e.g. binary flushed
from u-boot) and read from kernel.

Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
[tony@atomide.com: updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-06 16:00:08 -08:00
Artem Bityutskiy
7ac760c2f7 UBI: fix corrupted PEB detection for NOR flash
My new shiny code for corrupted PEB detection has NOR specific bug.
We tread PEB as corrupted and preserve it, if

1. EC header is OK.
2. VID header is corrupted.
3. data area is not "all 0xFFs"

In case of NOR we have 'nor_erase_prepare()' quirk, which invalidates
the headers before erasing the PEB. And we invalidate first the VID
header, and then the EC header. So if a power cut happens after we have
invalidated the VID header, but before we have invalidated the EC
header, we end up with a PEB which satisfies the above 3 conditions,
and the scanning code will treat it as corrupted, and will print
scary warnings, wrongly.

This patch fixes the issue by firt invalidating the EC header, then
invalidating the VID header. In case of power cut inbetween, we still
just lose the EC header, and UBI can deal with this situation gracefully.

Thanks to Anatolij Gustschin <agust@denx.de> for tracking this down.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reported-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>
2010-12-03 15:49:21 +02:00
Marek Vasut
f9d1bf7553 ARM: pxa: fix pxa2xx-flash section mismatch
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
2010-11-30 20:14:04 +08:00
Dan Carpenter
1b1d76e2df UBI: release locks in check_corruption
Commit 45aafd3299 "UBI: tighten the corrupted PEB criteria"
introduced some return paths that didn't release the ubi->buf_mutex

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-11-19 15:19:40 +02:00
Linus Torvalds
79346507ad Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (82 commits)
  mtd: fix build error in m25p80.c
  mtd: Remove redundant mutex from mtd_blkdevs.c
  MTD: Fix wrong check register_blkdev return value
  Revert "mtd: cleanup Kconfig dependencies"
  mtd: cfi_cmdset_0002: make sector erase command variable
  mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
  mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode
  mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one
  block2mtd: dubious assignment
  P4080/mtd: Fix the freescale lbc issue with 36bit mode
  P4080/eLBC: Make Freescale elbc interrupt common to elbc devices
  mtd: phram: use KBUILD_MODNAME
  mtd: OneNAND: S5PC110: Fix double call suspend & resume function
  mtd: nand: fix MTD_MODE_RAW writes
  jffs2: use kmemdup
  mtd: sm_ftl: cosmetic, use bool when possible
  mtd: r852: remove useless pci powerup/down from suspend/resume routines
  mtd: blktrans: fix a race vs kthread_stop
  mtd: blktrans: kill BKL
  mtd: allow to unload the mtdtrans module if its block devices aren't open
  ...

Fix up trivial whitespace-introduced conflict in drivers/mtd/mtdchar.c
2010-10-30 08:31:35 -07:00
Andres Salomon
40847437f1 mtd: fix build error in m25p80.c
While building an x86 distro kernel, I hit the following:

Kernel: arch/x86/boot/bzImage is ready  (#7)
ERROR: "of_mtd_parse_partitions" [drivers/mtd/devices/m25p80.ko]
undefined!

of_mtd_parse_partitions is defined with MTD_OF_PARTS, and that's only
built on PPC and microblaze.  The code in question should be wrapped w/
a stricter #ifdef.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-30 12:46:08 +01:00
David Woodhouse
8cc9de3ebd mtd: Remove redundant mutex from mtd_blkdevs.c
In commit 2a48fc0ab2 ('block: autoconvert
trivial BKL users to private mutex'), Arnd replaced the BKL usage with a
mutex. However, Maxim has already provided a better fix in commit
480792b7bf ('mtd: blktrans: kill BKL'),
which was simply to remove the BKL without replacing it — since he'd
already made it do all necessary locking for itself.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-30 12:39:21 +01:00
David Woodhouse
67577927e8 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Conflicts:
	drivers/mtd/mtd_blkdevs.c

Merge Grant's device-tree bits so that we can apply the subsequent fixes.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-30 12:35:11 +01:00
Frank Li
6fe4c59031 MTD: Fix wrong check register_blkdev return value
register_blkdev return 1..255 when major = 0.

if (ret ) {
	printk(KERN_WARNING "Unable to register %s block device on major %d: %d\n",
		tr->name, tr->major, ret);
	      mutex_unlock(&mtd_table_mutex);
	return ret;
}

Above code will return fail when register_blkdev return allocated major number.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-30 12:30:50 +01:00
Al Viro
51139adac9 convert get_sb_pseudo() users
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-10-29 04:16:33 -04:00
Al Viro
848b83a59b convert get_sb_mtd() users to ->mount()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-10-29 04:16:26 -04:00
David Woodhouse
6411bf6cdf Revert "mtd: cleanup Kconfig dependencies"
This reverts commit 432dc821c9.

The individual CFI geometry options were carefully set up to get sane
default values if the CFI_ADV_OPTIONS wasn't set, and it wasn't
appropriate to move them into an if/endif block.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 11:42:51 +01:00
Guillaume LECERF
08968041be mtd: cfi_cmdset_0002: make sector erase command variable
Some old SST chips use 0x50 as sector erase command, instead
of 0x30. Make this value variable to handle such chips.

Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 11:39:17 +01:00
Guillaume LECERF
9fc05fcada mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
Add support for SST38VF640x chips in CFI mode.

Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: yidong zhang <zhangyd6@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 11:38:48 +01:00
Guillaume LECERF
fc61015f72 mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode
Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 11:37:26 +01:00
Guillaume LECERF
b5d194ceae mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one
Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 11:00:18 +01:00
Nicolas Kaiser
89a82280a8 block2mtd: dubious assignment
When block2mtd_erase fails, a duplicated assignment instantly
changes instr->state from MTD_ERASE_FAILED to MTD_ERASE_DONE.

It looks to me like this might not be intended, or is it?

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Acked-By: Joern Engel <joern@logfs.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-26 10:58:00 +01:00
Linus Torvalds
72e58063d6 Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci
* 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci: (50 commits)
  davinci: fix remaining board support after io_pgoffst removal
  davinci: mityomapl138: make file local data static
  arm/davinci: remove duplicated include
  davinci: Initial support for Omapl138-Hawkboard
  davinci: MityDSP-L138/MityARM-1808 read MAC address from I2C Prom
  davinci: add tnetv107x touchscreen platform device
  input: add driver for tnetv107x touchscreen controller
  davinci: add keypad config for tnetv107x evm board
  davinci: add tnetv107x keypad platform device
  input: add driver for tnetv107x on-chip keypad controller
  net: davinci_emac: cleanup unused cpdma code
  net: davinci_emac: switch to new cpdma layer
  net: davinci_emac: separate out cpdma code
  net: davinci_emac: cleanup unused mdio emac code
  omap: cleanup unused davinci mdio arch code
  davinci: cleanup mdio arch code and switch to phy_id
  net: davinci_emac: switch to new mdio
  omap: add mdio platform devices
  davinci: add mdio platform devices
  net: davinci_emac: separate out davinci mdio
  ...

Fix up trivial conflict in drivers/input/keyboard/Kconfig (two entries
added next to each other - one from the davinci merge, one from the
input merge)
2010-10-25 10:59:31 -07:00
Linus Torvalds
51f00a471c Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
  mtd/m25p80: add support to parse the partitions by OF node
  of/irq: of_irq.c needs to include linux/irq.h
  of/mips: Cleanup some include directives/files.
  of/mips: Add device tree support to MIPS
  of/flattree: Eliminate need to provide early_init_dt_scan_chosen_arch
  of/device: Rework to use common platform_device_alloc() for allocating devices
  of/xsysace: Fix OF probing on little-endian systems
  of: use __be32 types for big-endian device tree data
  of/irq: remove references to NO_IRQ in drivers/of/platform.c
  of/promtree: add package-to-path support to pdt
  of/promtree: add of_pdt namespace to pdt code
  of/promtree: no longer call prom_ functions directly; use an ops structure
  of/promtree: make drivers/of/pdt.c no longer sparc-only
  sparc: break out some PROM device-tree building code out into drivers/of
  of/sparc: convert various prom_* functions to use phandle
  sparc: stop exporting openprom.h header
  powerpc, of_serial: Endianness issues setting up the serial ports
  of: MTD: Fix OF probing on little-endian systems
  of: GPIO: Fix OF probing on little-endian systems
2010-10-25 08:19:14 -07:00
Lan Chunhe-B25806
0b824d2b10 P4080/mtd: Fix the freescale lbc issue with 36bit mode
When system uses 36bit physical address, res.start is 36bit
physical address. But the function of in_be32 returns 32bit
physical address. Then both of them compared each other is
wrong. So by converting the address of res.start into
the right format fixes this issue.

Signed-off-by: Lan Chunhe-B25806 <b25806@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 15:41:04 +01:00
Roy Zang
3ab8f2a2e7 P4080/eLBC: Make Freescale elbc interrupt common to elbc devices
Move Freescale elbc interrupt from nand driver to elbc driver.
Then all elbc devices can use the interrupt instead of ONLY nand.

For former nand driver, it had the two functions:

1. detecting nand flash partitions;
2. registering elbc interrupt.

Now, second function is removed to fsl_lbc.c.

Signed-off-by: Lan Chunhe-B25806 <b25806@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Wood Scott-B07421 <B07421@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 15:40:54 +01:00
Joe Perches
1cd844fe43 mtd: phram: use KBUILD_MODNAME
Use the more standard #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
No change in output strings.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:36:36 +01:00
Kyungmin Park
2316d3bc95 mtd: OneNAND: S5PC110: Fix double call suspend & resume function
The suspend & resume called from mtd core. So no need to call at driver.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:36:14 +01:00
Jon Povey
cdcf12b211 mtd: nand: fix MTD_MODE_RAW writes
RAW writes were broken by 782ce79a45
which introduced a check of ops->ooboffs in nand_do_write_ops().

When writing in RAW mode this is called with an ops struct on the stack
of mtdchar.c:mtd_write() which does not initialise ops->ooboffs, so it
is garbage and fails this test.

This test does not make sense if ops->oobbuf is NULL, which it is in the
RAW write path, so include that in the test.

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:33:37 +01:00
Maxim Levitsky
334e5f56f1 mtd: sm_ftl: cosmetic, use bool when possible
I didn't know that kernel allows use of that typedef.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:33:08 +01:00
Maxim Levitsky
9bf70717a5 mtd: r852: remove useless pci powerup/down from suspend/resume routines
It turns out that pci core now handles these, so this code is redundant
and can even cause bugs

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:32:21 +01:00
Maxim Levitsky
12aebf3e1a mtd: blktrans: fix a race vs kthread_stop
There is small race window that could make kthread_stop hang forever.
I found that while hacking the IR subsystem.

Signed-off-by: Maxim Levitsky <maximlevisky@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:28:52 +01:00
Maxim Levitsky
480792b7bf mtd: blktrans: kill BKL
It not needed, because I already added locking for all fops
methods.

Signed-off-by: Maxim Levitsky <maximlevisky@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:28:39 +01:00
Maxim Levitsky
008c751ec7 mtd: allow to unload the mtdtrans module if its block devices aren't open
Now it once again possible to remove mtdtrans module.
You still need to ensure that block devices of that module aren't mounted.
This is due to the fact that as long as a block device is open, it still exists,
therefore if we were to allow module removal, this block device might became used again.

This time in addition to code review, I also made the code
pass some torture tests like module reload in  a loop + read in a loop +
card insert/removal all at same time.

The blktrans_open/blktrans_release don't take the mtd table lock because:

While device is added (that includes execution of add_mtd_blktrans_dev)
the lock is already taken

Now suppose the device will never be removed. In this case even if we have changes
in mtd table, the entry that we need will stay exactly the same. (Note that we don't
look at table at all, just following private pointer of block device).

Now suppose that someone tries to remove the mtd device.
This will be propagated to trans driver which _ought_ to call del_mtd_blktrans_dev
which will take the per device lock, release the mtd device and set trans->mtd = NULL.
>From this point on, following opens won't even be able to know anything about that mtd device
(which at that point is likely not to exist)
Also the same care is taken not to trip over NULL mtd pointer in blktrans_dev_release.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:28:30 +01:00
Mike Frysinger
ebd71e3a48 mtd: maps: gpio-addr-flash: fix warnings and make more portable
As reported on lkml, building this module for HIMEM systems spews warnings
about mismatch in pointer types.  Further, we need to use ioremap() in order
to properly access the flash memory on most systems rather than just doing
it directly.

Reported-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:16:17 +01:00
Mike Frysinger
5954c47c21 mtd: Blackfin NFC: fix badblock location with BootROM OOB
The bbt structure isn't actually used, just the badblockpos.  This lets
the driver correctly handle badblocks with the different OOB layout with
certain sized flashes.  Previously, the blocks would all be reported as
bad and be completely unusable.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:15:22 +01:00
Wolfram Sang
d031c22643 mtd: cfi_cmdset_0002: code cleanups
- remove disabled code (hasn't been touched since the beginning of git
  and should be reimplemented if really needed)
- convert remaining c++-comments to plain c-style

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:14:19 +01:00
Roman Tereshonkov
edb44b9b9c mtd: onenand: fix 4KiB page onenand chip recognition
For 4Gib non-DDP chip it does not follow that it is always 4KiB page chip.
The number of data buffers is checked and if it is equal to 1
we suppose that it is 4KiB page onenand chip.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:13:20 +01:00
Stefan Roese
940fe282ae mtd: physmap_of: Loop through all "reg" tuples for mapping
This patch changes the loop over the "reg" tuples to not exit
directly upon of_address_to_resource() failure but to continue
with the next "reg" tuple instead. This failure could be due to
size = 0, which might be passed via the device-tree.

This is needed for boards, where a "reg" tuple might have size 0
(of_address_to_resource() returns with EINVAL when size = 0).

Example:

Fully equipped board:

	reg = <0 0x00000000 0x00400000
	       0 0x00400000 0x00400000>;

Partially equipped board:

	reg = <0 0x00000000 0x00400000
	       0 0x00400000 0x00000000>;

This could be the case on boards with runtime detection of
multiple NOR flash configurations where the detected flash size
is inserted into the dtb in U-Boot.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 01:12:46 +01:00
G, Manjunath Kondaiah
733daa52b8 mtd: omap2: fix static declaration warning
This patch fixes sparse warning for static declaration of variable "use_dma"

drivers/mtd/nand/omap2.c:114:11: warning: symbol 'use_dma' was not declared. Should it be static?

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:57:33 +01:00
Ian Munsie
766f271a63 mtd: Fix endianness issues from device tree
This patch adds the appropriate conversions to correct the endianness
issues in the MTD driver whenever it accesses the device tree (which is
always big endian).

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:55:56 +01:00
David Jander
d86fbdb8ed mtd: m25p80.c: Add support for S25FL032P spi-nor flash devices.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:55:13 +01:00
Sebastian Andrzej Siewior
ce85b79fe8 mtd: nandsim: add module param for BBT handling
I used this to check the BBT on flash together with a hack in mtdchar in
order to read bad blocks.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:55:03 +01:00
Sebastian Andrzej Siewior
453281a973 mtd: nand: introduce NAND_CREATE_EMPTY_BBT
it will create an empty BBT table without considering vendor's BBT
information. Vendor's information may be unavailable if the NAND
controller has a different DATA & OOB layout or this information may be
allready purged.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:54:37 +01:00
Sebastian Andrzej Siewior
7cba7b14fe mtd: nand: add support for BBT without OOB
The first (sixt) byte in the OOB area contains vendor's bad block
information. During identification of the NAND chip this information is
collected by scanning the complete chip.
The option NAND_USE_FLASH_BBT is used to store this information in a sector so
we don't have to scan the complete flash. Unfortunately the code stores
a marker in order to recognize the BBT in the OOB area. This will fail
if the OOB area is completely used for ECC.
This patch introduces the option NAND_USE_FLASH_BBT_NO_OOB which has to be
used with NAND_USE_FLASH_BBT. It will then store BBT on flash without
touching the OOB area. The BBT format on flash remains same except the
first page starts with the recognition pattern followed by the version byte.
This change was tested in nandsim and it looks good so far :)

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:53:48 +01:00
Sebastian Andrzej Siewior
df5b4e343c mtd: nand: pull in td into read_bbt()
No code change.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:53:37 +01:00
Sebastian Andrzej Siewior
cda320915d mtd: nand: use ALIGN where possible
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:52:50 +01:00
Kyungmin Park
861fae1818 mtd: OneNAND: S5PC210 OneNAND support
S5PC210 has the same OneNAND controller as S5PC110

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:52:43 +01:00
Kyungmin Park
e23abf4b77 mtd: OneNAND: S5PC110: Implement DMA interrupt method
Implement DMA interrupt method. previous time it polls the DMA status.
It can reduce the CPU power but decrease the performance a little.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:52:26 +01:00
Kyungmin Park
dcf08227e9 mtd: OneNAND: S5PC110: Fix wrong DMA handling when HIGHMEM
When use HIGHMEM, dma_map_single doesn't get the proper DMA address.
So use the dma_map_page in this case.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:51:33 +01:00