mtd: mtdraw: drop ioctl callback for mtdraw device ...

Do not call mtd_ioctl for mtdraw devices. mtd_ioctl will derefence
the priv pointer to a struct mtd_info whereas with mtdraw devices it will be
a struct mtdraw pointer. We do not need ioctls for mtdraw devices, so drop
it instead of fixing it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: raw: rename raw device ...

The name of the raw device is mtdraw<num> which is inconsistent to other
mtd devices which are named mtd<num>.<partname>. Rename it to mtd<num>.raw.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: introduce mtd_read_oob and mtd_write_oob ...

Directly copied from the Kernel as of 3.11-rc1

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: rename MTD_OOB_* to MTD_OPS_* ...

To sync with the Linux kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtdraw: fix oob read and write ...

actually ops.ooboffs is not defaulted so when its value gets
added to chip->oob_poi in nand_fill_oob or nand_transfer_oob
the respective memcpy is using a wrong address.

With this patch, both md -s /dev/nandraw0 and cp xyz /dev/nandraw0.sb
are working fine on an i.MX28 target (instead of crashing the board).

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: Add parameter to allow erasing bad blocks ...

While erasing bad blocks is a potentially dangerous operation
it is sometimes needed during development or when some foreign
code has touched the flash.

This patch adds a device parameter 'erasebad' to allow erasing
bad blocks. Since this is not wanted during production this is
behind a Kconfig option.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: Use mtd_* functions where appropriate ...

Instead of dereferencing struct mtd_info members directly use
the wrapper functions which have an additional check if the
callback exists if it is optional, like mark_bad or is_bad.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/mtd' ...

Conflicts:
	arch/arm/configs/at91sam9x5ek_defconfig

mtd: introduce mtd_block_isbad ...

this allow to do not provide block_isbad at mtd driver level
as example spi flash

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: fix mtdraw_write/mtdraw_erase arguments ...

For the !CONFIG_MTD_WRITE case they still have ulong as offset
argument.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd mtdraw: fix fixing partial page read ...

toread is unitialized. We have to use count instead.

| commit 992c291
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Sat Sep 15 16:54:47 2012 +0200
|
|    mtd mtdraw: Fix partial page read
|
|    When reading parts of a page we have to limit the maximum bytes copied
|    to the remaining bytes of a page.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd mtdraw: Fix partial page read ...

When reading parts of a page we have to limit the maximum bytes copied
to the remaining bytes of a page.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>

mtd/mtdraw: fix format specifier for ssize_t ...

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: add private data to mtddev-hook ...

The mtdoob and mtdraw device don't clean up correctly.
Added a private data element to hold allocated memory.
Fix remove of mtdoob and mtdraw device.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: fix compiler warnings ...

Fix some compiler warnings.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

use loff_t for file offsets ...

This is a first step for 64bit file support: Make the file sizes/offsets
64bit.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/mtd: fix mtdraw write support ...

When unaligned writes are used, typically doing a cp file /dev/mtdraw0.foo,
the alignement correction code was incorrectly handling such cases, and
didn't return the expected number of written bytes.

This was tested on a 528 block size.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/mtd: add the mtdraw device (data+oob) ...

Add a device to read and write to MTD data and oob
(/dev/mtdraw<N>).

The device is constrained in a separate source file, so that
further improvement of commands (such as nandwrite) could
make it useless, and easy to remove.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>