mtd: fix reading data from page that needs cleanup ...

mtd_read´() returns -EUCLEAN to indicate that a page needs cleanup.
This value shouldn't be returned from the mtd read file operation
since this should return the number of bytes read.

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

nand-bb: fix writing to the end of a .bb device ...

As nand_bb_write_buf calls mtd_write(bb->mtd, cur_ofs, now, ...) the
limit that now should be checked against is bb->mtd->size - cur_ofs.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

ARM: start: Fix image size calculation ...

In barebox_non_pbl_start() we do not run at the address we are linked
at, so we must read linker variables using ld_var(). Since ld_var()
current is not available on arm64 we create two zero sized arrays,
one at the begin of the image and one at the end. The difference
between both is the image size we are looking for.

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

mtd: spi-nor: add support for s25fl208k ...

Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/truncate'

ubi: barebox: Remove character device flag from static volumes ...

Character device flag was set for ubi static volumes to vary the device
file size. This is now done with the truncate option. So no need for
the character device flag. This makes it also possible to dump a image from
the static volume.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ubi: Add truncate callback ...

The size of static ubi volumes changes depending on the content.
Add truncate callback to handle resizes.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: m25p80: add support for Everspin MR25H40 ...

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ubi: Only read necessary size when reading the VID header ...

Based on kernel commit 8a8e8d2fdbab ("ubi: Only read necessary size when reading
the VID header") by Sascha Hauer <s.hauer@pengutronix.de>:

    When reading the vid hdr from the device UBI always reads a whole
    page. Instead, read only the data we actually need and speed up
    attachment of UBI devices by potentially making use of reading
    subpages if the NAND driver supports it.

    Since the VID header may be at offset vid_hdr_shift in the page and
    we can only read from the beginning of a page we have to add that
    offset to the read size.

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: peb: Fix format specifier ...

The correct format specifier for size_t is %zu. Use it.

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

mtd: peb: fix usage of uninitialized variable ...

'read' is used in an error message but never assigned a value to. Remove
the variable.

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

Merge branch 'for-next/misc'

mtd: spi-nor: add MX25U2033E ...

This chip can be found in 4th generation Kindle devices

Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: nand: nand_mxs: Fix readtotal calculation ...

The calculation of readtotal must be bit alligend. If not the bch core
finds bit flips in every page, because readtotal is too small.
This bug was mostly introduced since commit "51061a9 mtd: nand: nand_mxs:
Add subpage read support".

Tested with:
nand: NAND device: Manufacturer ID: 0x01, Chip ID: 0xd3 (AMD/Spansion
S34ML08G2), 1024MiB, page size: 2048, OOB size: 128

nand: NAND device: Manufacturer ID: 0x2c, Chip ID: 0xdc (Micron
MT29F4G08ABADAWP), 512MiB, page size: 2048, OOB size: 64

nand: NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung NAND
1GiB 3,3V 8-bit), 1024MiB, page size: 2048, OOB size: 64

Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: Make UBI detection more robust ...

When we want to detect if a mtd device contains an UBI image then
testing the first block is not enough since it can always happen that
UBI has just erased the block before the power failed during last boot.
Since UBI only ever erases one block at a time and directly writes the
ec header to it afterwards, it shouldn't be necessary to scan the whole
device for UBI data. Scan the first 64 blocks. The first non-empty block
then must contain UBI data, if instead we find foreign data we assume
that no UBI is on that mtd device.

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

nand: imx6: Changed default NAND clock ...

The Barebox recognized false bad erase blocks while booting from a
Spansion NAND (1). This error occurred due a to high clock. The
Kernel sets the default NAND clock to 22Mhz. So, to fix this error and
to be more identical with the Kernel, the Barebox should be too.

1: nand: NAND device: Manufacturer ID: 0x01, Chip ID: 0xd3 (AMD/Spansion
S34ML08G2), 1024MiB, page size: 2048, OOB size: 128

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Tested-by: Stefan Lengfeld <s.lengfeld@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: enable thread earlier ...

Since "57cebc4 mtd: ubi: Fix scrubbing during attach" we make sure
that the wear level worker does not start too early. However, now
there are cases when the worker starts too late. When a ubi image is
freshly written a volume may be autoresized. This has to be done
after the wear level worker is started because otherwise the initial
fastmap update will not be able to find any anchor PEBs.

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

ubi: fix spelling ...

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Fix scrubbing during attach ...

ensure_wear_leveling() is called at the end of ubi_wl_init() and may
come to the decision to scrub some blocks. In the Kernel this is done
in a separate thread, but in barebox we do this synchronously. The
problem is that during ubi_wl_init() the EBA system is not yet
initialized (ubi_eba_init() is not yet called), so the wear level worker
hits a NULL pointer deref when the fastmap needs to be updated and
ubi_write_fastmap() accesses vol->eba_tbl.

Solve this by honoring the ubi->thread_enabled flag which is only set
to true when UBI is sufficiently initialized. This means we now can
have multiple works queued, so we can no longer simply do one work when
queued, but instead have to continue to do work until all work is done.
The best place to do so is a ubi_thread() function which behaves similar
to the Kernel function with the same name, but is called synchronously
in barebox. To make sure that the initially queued works are done, the
call to (no-op) wake_up_process() at the end of ubi_attach_mtd_dev()
is replaced with a call to ubi_thread().

While at it also honor the ubi->ro_mode flag to make sure we do not do
any wear leveling work on readonly UBI devices.

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

Merge branch 'for-next/ubi'

Merge branch 'for-next/mtd'

mtd: ubi: add API call to rename volumes. ...

Signed-off-by: Giorgio Dal Molin <iw3gtf@arcor.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: remove now unused ioctls ...

The only ioctl needed is the one to get the ubi_num from a file
descriptor. The remaining ioctls are now implemented as regular
function calls.

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

nand: denali: get rid of compile-time debug information ...

Remove dev_dbgs containing __FILE__ and __LINE__ and no other
interesting debug informations.

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

nand: denali: use is_timeout in while loop ...

Instead of using udelay and a countdown, use the is_timeout function.
Also, move the code closer to the kernel version, i.e. check for the
correct bank and clean the interrupt status.

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

nand: denali: use correct interrupts in read_page ...

The interrupt mask is incorrect in case of HW error correction.
The driver will time out waiting for the wrong interrupts.

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

mtd: imx-nand: Move v3 register definitions to include file ...

Move v3 register definitions to include file so that they can
be reused for the early nand boot code.

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

mtd: ubi: introduce barebox specific ioctl to get ubi_num ...

Code wishing to manipulate ubi devices from outside the ubi
layer needs the ubi_num as reference. Add an ioctl to get
the ubi_num from a filedescriptor.

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

mtd: ubi: Add API calls to create/remove volumes ...

Currently we use a ioctl API to create/remove ubi volumes. This
means we always have to carry all function code for ubi volume
manipulation when the ioctl is compiled in.
This adds a function API to create/remove volumes so that the linker
can throw the unused code away later.

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