We've noticed that sometimes "MTD do_write_buffer(): software timeout"
message was printed out when writing to a Fujitsu NOR flash.
It turned out that this was because of a race in the timeout handling
do_write_buffer(). A small timeout of (HZ / 1000) + 1 is used there, and
sometimes if the timer interrupt handling takes more than one or even two
jiffies (which is 1-2 ms with HZ == 1000) and that interrupt happens just
after chip_ready() call, the driver bails out from a ready polling loop
despite the chip has actually become ready while all those interrupts were
handled. To deal with this issue, extra check for chip ready is neccessary on
timeout expiration (and the checks should better be reordered).
As do_write_oneword() uses the same approach, it needs to also be changed.
Signed-off-by: Konstantin Baidarov <kbaidarov@ru.mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The following patch adds support for the TQ Systems TQM834x Boards.
Verified on TQM8349L.
This is a resubmit after integrating the suggested changes.
Signed-off-by: Marian Balakowicz <m8@semihalf.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Fix two compile warnings that occur because of treating two
'unsigned long's as 'void *'s.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The assignement of a "const char *" to a "char *" variable
is emitting a warning with gcc 4.0. We cannot change
mtd->name to "const char *" as we have dynamic assignements
of the name. So casting is the correct solution here
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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>
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>
- Use map.virt instead of map.map_priv_1 since it has the correct type.
- Use readw/writew instead of dereferencing an ioremap'd cookie.
- Remove an unused variable.
Signed-off-by: David Vrabel <dvrabel@arcom.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The Sharp Zaurus akita and borzoi models are large page flash devices.
This patch adds support for them to the sharpsl MTD NAND driver but
keeps the oob layout and bad block positions compatible with the Sharp
Zaurus 2.4 kernel and ROM bootloader.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Change to the extended cfi table parsing for Intel NOR flash that uses
the info in the extended table to 'walk' the table rather than using
hard coding for various primary extended query table version numbers.
From: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Added .owner initialisation to allow the
tracking of the device_driver owners when
built as a module
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Added owner to device driver field for tracking
when loaded as a module.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
