Commit Graph

286 Commits

Author SHA1 Message Date
Thomas Gleixner a36ed2995c [MTD] Simplify NAND locking
Replace the chip lock by a the controller lock. For simple drivers a
dummy controller structure is created by the scan code.
This simplifies the locking algorithm in nand_get/release_chip().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23 11:37:03 +02:00
Joern Engel 5fa433942b [MTD] Introduce MTD_BIT_WRITEABLE
o Add a flag MTD_BIT_WRITEABLE for devices that allow single bits to be
  cleared.
o Replace MTD_PROGRAM_REGIONS with a cleared MTD_BIT_WRITEABLE flag for
  STMicro and Intel Sibley flashes with internal ECC.  Those flashes
  disallow clearing of single bits, unlike regular NOR flashes, so the
  new flag models their behaviour better.
o Remove MTD_ECC.  After the STMicro/Sibley merge, this flag is only set
  and never checked.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-22 23:18:29 +02:00
Joern Engel 28318776a8 [MTD] Introduce writesize
At least two flashes exists that have the concept of a minimum write unit,
similar to NAND pages, but no other NAND characteristics.  Therefore, rename
the minimum write unit to "writesize" for all flashes, including NAND.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
2006-05-22 23:18:05 +02:00
David Woodhouse 52239da1b0 [MTD NAND] Modify check for modules registering NAND devices without ->owner
Make it work even with compilers which lack the wit to notice that
THIS_MODULE is always non-NULL. Use #ifdef MODULE instead. It's only
a temporary debugging check anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-14 16:54:39 +01:00
David Woodhouse 552d920518 [MTD] Fix module refcounting in NAND board drivers.
The _board_ driver needs to be mtd->owner, and it in turn pins the
nand.ko module. Fix them all to actually do that, and fix nand.ko not to
overwrite it -- and also to check that the caller sets it, if the caller
is a module.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-14 01:20:46 +01:00
David Woodhouse e0c7d76753 [MTD NAND] Indent all of drivers/mtd/nand/*.c.
It was just too painful to deal with.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-13 18:07:53 +01:00
Richard Purdie 8fe833c1b0 [PATCH] LED: add NAND MTD activity LED trigger
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:18:57 -08:00
Linus Torvalds b3ce1debe2 Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6
Some manual fixups for clashing kfree() cleanups etc.
2005-11-07 10:24:08 -08:00
Jesper Juhl fa671646f6 [PATCH] kfree cleanup: drivers/mtd
This is the drivers/mtd part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in drivers/mtd/.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: Joern Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:54:02 -08:00
Thomas Gleixner 61b03bd7c3 [MTD] NAND: Clean up trailing white spaces
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-07 15:10:37 +01:00
Todd Poynor 868801e561 [MTD] NAND: nand_write_ecc memory and OOB corruption
Nathan Roberts noticed the nand_write_ecc index into oobbuf goes out of
bounds when crossing an erase block boundary, causing incorrect OOB data
to be written and corrupting memory.  Reset the index to zero after
re-preparing oobbuf for a new erase block.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-07 02:24:31 +01:00
Vitaly Wool 49196f3332 [MTD] NAND nand_base: Fix shift for bad block check (16bit devices only)
In case of an odd offset, the result was shifted by 1 instead of 8

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-07 02:15:21 +01:00
Vitaly Wool 962034f439 [MTD] NAND: Add suspend/resume functionality
The changes introduced allow to suspend/resume NAND flash.
A new state (FL_PM_SUSPENDED) is introduced, as well as
routines for mtd->suspend and mtd->resume to put the flash in
suspended state from software pov.

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 21:43:45 +01:00
Thomas Gleixner d409466154 [MTD] NAND: Use correct mask for OOB size calculation
The bit mask used for oob size calculation was using 2 bits instead
of one. Fortunately the next bit has been 0 all the time.

Thanks to Nathan H. for pointing this out

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 20:22:32 +01:00
Ingo Molnar 8446f1d391 [PATCH] detect soft lockups
This patch adds a new kernel debug feature: CONFIG_DETECT_SOFTLOCKUP.

When enabled then per-CPU watchdog threads are started, which try to run
once per second.  If they get delayed for more than 10 seconds then a
callback from the timer interrupt detects this condition and prints out a
warning message and a stack dump (once per lockup incident).  The feature
is otherwise non-intrusive, it doesnt try to unlock the box in any way, it
only gets the debug info out, automatically, and on all CPUs affected by
the lockup.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:17 -07:00
Thomas Gleixner 19870da7ea [MTD] NAND: Fix broken bad block scan for 16 bit devices
The previous change to read a single byte from oob breaks the
bad block scan on 16 bit devices, when the byte is on an odd
address. Read the complete oob for now.
Remove the unused arguments from check_short_pattern()
Move the wait for ready function so it is only executed when
consecutive reads happen.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-07-16 09:27:52 +02:00
Thomas Gleixner d7e78d4f21 [MTD] NAND: Change exports to _GPL
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-06-29 14:27:41 +02:00
Thomas Gleixner 0dfc62465e [MTD] NAND: Reorganize chip locking
The code was wrong in several aspects. The locking order was
inconsistent, the device aquire code did not reset a variable
after a wakeup and the wakeup handling was not working for
applications where multiple chips are sharing a single
hardware controller.
When a hardware controller is available the locking is now
reduced to the hardware controller lock and the waitqueue is
moved to the hardware controller structure in order to avoid
a wake_up_all().

The problem was pointed out by Ben Dooks, who also found the
missing variable reset as main cause for his deadlock problem.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-06-29 14:15:17 +02:00
Thomas Gleixner 90e260c84f [MTD] NAND: Honour autoplacement schemes supplied by the caller
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:20:45 +02:00
Jarkko Lavinen 0a18cde60f [MTD] NAND: Fix the broken dynamic array allocations
Reverting the change from 1.136 to 1.137 (back to static allocation of ecc
arrays) due to stack corruption and ecc errors.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:17:30 +02:00
Dan Brown 82e1d19fc3 [MTD] NAND: Fix reading of autoplaced OOB when there are multiple free sections.
Signed-off-by: Dan Brown <dan_brown@ieee.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:10:30 +02:00
Thomas Gleixner 22c60f5fb7 [MTD] NAND: Move the NULL check into the calling function
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:09:10 +02:00
Dan Brown bb75ba4c44 [MTD] NAND: Fix missing NULL pointer check
Version 1.137 broke nand_read_ecc clients who pass NULL oobsel.  Fixed.

Signed-off-by: Dan Brown <dan_brown@ieee.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:08:47 +02:00
Thomas Gleixner 998cf6403c [MTD] NAND: Fix oob available calculation
Use oobfree to calculate the number of oob bytes available for fs usage

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:07:14 +02:00
Artem B. Bityuckiy 15fc108606 [MTD] NAND: Use arrays of needed size instead of constant-sized.
Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:04:06 +02:00
Ben Dooks 3b946e3f3d [MTD] NAND: Fixed unused loop variable
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:51:48 +02:00
Thomas Gleixner 20a6c21190 [MTD] NAND: Use cond_resched instead of msleep
Replace msleep by cond_resched. On machines with HZ=100 (e.g. ARM)
msleep slows down the operation by factor 10

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:47:55 +02:00
Thomas Gleixner 3b88775c75 [MTD] NAND: Check command timeout
Check timeout while we wait for the command to finish. No worry about a
false result. This prevents deadlocking when detecting an unknown number
of chips and is useful for removable media too.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:42:49 +02:00
Kyungmin Park 0ea4a7558f [MTD] NAND: Early Manufacturer ID lookup
Move manufacturer ID search to display correct ID in case of buswidth
mismatch.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:36:30 +02:00
Artem B. Bityuckiy 41ce921440 [MTD] NAND: Allow operation without bad block table
Small bugfix. Sometimes it may be handy not to have bbt.
So, this->bbt might be NULL.

Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:31:01 +02:00
Thomas Gleixner 0040bf382c [MTD] NAND: Skip bad block table scan on request
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:30:07 +02:00
David A. Marlin 068e3c0a00 [MTD] NAND Add optional ECC status check callback
Add optional hardware specific callback routine to perform extra error
status checks on erase and write failures for devices with hardware ECC.

Signed-off-by: David A. Marlin <dmarlin@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:08:59 +02:00
David A. Marlin a4ab4c5d32 [MTD] NAND use symbols instead of literals
Replace some literals with defined symbols.

Signed-off-by: David A. Marlin <dmarlin@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 11:32:36 +02:00
Thomas Gleixner 15266bb74d [MTD] NAND replace yield
Replace yield by msleep. M.Wilcox stared at it and frowned

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 11:29:39 +02:00
David A. Marlin 30f464b74b [MTD] NAND workaround for AG-AND disturb issue. AG-AND recovery
Added workaround for Renesas AG-AND chips "disturb" issue 
for Bad Block Table. 
Added support for the device recovery command sequence 
for Renesas AG-AND chips.

Signed-off-by: David A. Marlin <dmarlin@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 11:26:45 +02:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00