mtd: partition: Fix OF partition fixup ...

To get the number of address cells and size cells we have to use
the newly created partition node, not the parent device node. The
parent device node returns the address/size cells of the controller
node, not the partition node.

On an am335x machine this fixes the device tree passed to Linux.
The situation there is:
	...
	gpmc@50000000 {
		...
		#address-cells = <0x2>;
		#size-cells = <0x1>;
		ranges = <0x0 0x0 0x8000000 0x10000000>;
		...
		nand@0,0 {
			reg = <0x0 0x0 0x0>;
			#address-cells = <0x1>;
			#size-cells = <0x1>;
			...
			partition@7 {
				label = "system";
				reg = <0x220000 0x7de0000>;
			};
		};
	};

and without this patch barebox passes three bytes for
partition@7's reg property instead of only two which naturally
confuses Linux and yields to the system partition to start at 0
with a size of 0x220000.

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

mtd: nand_omap_gpmc: Fix ecc check for bch8 romcode ...

The bch8 romcode was only checked and corrected for the
first 512 bytes of a 2048 byte page. Set interation counter
and eccsizes correct for the different bch types.

Tested OMAP_ECC_BCH8_CODE_HW and OMAP_ECC_BCH8_CODE_HW_ROMCODE.

Reported-by: Gabor Janak <g.janak@agilion.de>
Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: nand_omap_gpmc: Remove unused code ...

The ecc layout structs are not used anywhere.

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

Merge branch 'for-next/streaming-dma' ...

Conflicts:
	drivers/mci/dw_mmc.c

Merge branch 'for-next/mtd-partitions'

ARM: move DMA alloc functions to dma.h ...

This better separates the DMA from the MMU functionality.

Also move all drivers that only depends on asm/mmu.h for the alloc
functions over to the common header.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: change dma_alloc/free_coherent to match other architectures ...

As a lot drivers currently rely on the 1:1 virt->phys mapping on ARM
we define DMA_ADDRESS_BROKEN to mark them. In order to use them on
other architectures with a different mapping they need proper fixing.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: fixup device tree partitions ...

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

mtd: Add a partitions parameter to mtd devices ...

The partitions parameter allows to partition a mtd device
using a standard cmdline partition description string. This
way the partitions of a mtd device can be changed at once.
The output of the string can be used to be passed to the kernel
as cmdline partition string. The partitions can also still be
changed with addpart/delpart, the partitions parameter will
be updated accordingly.

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

mtd: Use flags parameter in mtd_add_partition ...

mtd_add_partition is passed a flag parameter. This has been unused
so the DEVFS_PARTITION_FIXED and DEVFS_PARTITION_READONLY were ignored.
Fix this.

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

mtd: forbid conflicting mtd partitions ...

mtd partitions should not conflict with each other, so forbid this.
Also add the partitions to the partitions list sorted, so that they
can be easier translated into a cmdline partition string.

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

mtd: nand: remove automatically created bb devices ...

the bb devices which are created in add_mtd_device() must be removed
in del_mtd_device(). Also remove deletion of the bb devices in the
mtdparts-add environment file.

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

mtd: Add partitions to list ...

So that we can iterate over the existing partitions from the master
mtd device.

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

mtd: partitions: Add error check ...

add_mtd_device can fail. Add an error check and bail out properly.

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

mtd: partitions: Use xstrdup ...

The return value of strdup is not checked. Use xstrdup instead.

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

mtd: core: add error checks ...

register_device and devfs_create can fail. Add error checks for these.

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

mtd: nand-imx: don't copy more bytes than read from hardware ...

The NFC command used for reading the result of a READID command to the NAND chip
reads 6 bytes (in x8 mode) or 6 words (in x16 mode with the upper bytes all
being 0). So there is no need to safe 16 bytes for later consumption.

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

mtd: nand: cleanup ONFI printed errors, warnings ...

This corresponds to commit c7f23a7 in
the Linux kernel.

One notable difference is however that ONFI detection is allowed here
even in 16-bit mode. This is proved to work fine on an i.MX25 based
machine with a x16 NAND.

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

mtd: nand-imx: fix byte reading in x16 mode ...

There are a few NAND commands that make the chip only respond on I/O
lines 0 to 7 even for x16 devices. READID (90h) is one such command
which was already handled fine in the driver (at least for NFC v1 and
v2). Other commands (like PARAM (ECh) to read out ONFI parameters)
however were not handled properly. Instead of adding another callback
make the read_byte callback handle the holes added by the NFC and depend
on the nand-base support to call read_byte when necessary instead of
read_buf.

This fixes reading the ONFI parameter page on an i.MX25 with an x16 NAND
and probably[1] also the result of READID on i.MX51/i.MX53 with x16
NAND.

[1] untested because no matching machine available

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

mtd: nand-bb: Also print raw position in debug messages ...

When debugging the nand-bb devices also the raw position on the
device is interesting, print it.

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

mtd: nand-bb: Fix test for bad block when reading ...

in nand_bb_read() 'offset' contains the virtual position on the device,
but we have to test for a bad block on the raw physical position, so
use bb->offset instead of offset

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

mtd: nand-bb: fix erasing bb devices with bad blocks ...

mtd_erase does not skip bad blocks, we must skip them in nand_bb_erase
instead.

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

mtd: nand-bb: Fix accesses beyond device ...

When a block is marked bad after the bb device has been created
the real size of the bb device is smaller than the calculated size
on creation. In this case we can't rely on the upper layers anymore
that they won't pass read/write sizes in that fit into the device.

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

mtd: Fix allowing to erase bad blocks on partitions ...

Partitions are mtd devices themselves, but the 'erasebad'
parameter is only set to the master mtd device. To allow to
erase bad blocks on partitions test the master device instead
of the partition devices.

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

mtd: nand: omap: Fix OMAP_ECC_BCH8_CODE_HW ecc mode ...

This is broken since:

| commit 00f119a
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Fri Aug 1 14:09:48 2014 +0200
|
|     mtd: omap gpmc: fix ecc bytes/size
|
|     The ecc bytes / size are per subpage, not per page.
|
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The ecc code in omap_correct_data() expects to correct a whole page
at once, so we must tell the nand layer that we have 4 * 13 bytes of
ecc bytes and 4 * 512 bytes of ecc size. Otherwise the NAND layer will
iterate over 512 byte steps over a page and call the .correct callback
each time.

This only works for 2k pagesize and needs revisit once other page sizes
shall be supported. It would be better to tell the nand layer the real
ecc bytes (13) and ecc size (512) instead and drop the iteration in
omap_correct_bch(). However, this needs better testing so it isn't done
here now.

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

Merge branch 'for-next/pxa'

Merge branch 'for-next/misc'

ARM: i.MX6: use generic calculation in nand bbu handler ...

The parameters ECC Strength, BadBlockMarkerByte and BadBlockMarkerStartBit in
the FCB structure depends on the nand chip's pagesize and oobsize. Instead of
hardcoding these values into the imx6 bbu handler calculate these values on the
fly. Therefore we export the necessary functions from the nand_mxs driver to
use them in the bbu handler.

Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

trivial: s/flasg/flash/ ...

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

mtd: nand: add mrvl-nand driver ...

The driver is taken from the Linux kernel, with the following changes :
 - all DMA removed
 - all asynchronous handling removed, including the interrupt handler,
   and the asynchronous state handling
 - pxa armada support removed

Most the kernel structure was kept, to ease up future fixes integration
from the kernel driver.

The driver is tested on a pxa3xx system development
board (aka. zylonite), and reading, writing, erasing, and bad block
management were tested.

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