linux-toradex.git/include/linux/mtd/nand.h, branch v2.6.32.3

mtd: nand: add new ECC mode - ECC_HW_OOB_FIRST

2009-09-19T18:14:54+00:00

This patch adds the new mode NAND_ECC_HW_OOB_FIRST in the nand code to
support 4-bit ECC on TI DaVinci devices with large page (up to 2KiB) NAND
chips.  This ECC mode is similar to NAND_ECC_HW, with the exception of
read_page API that first reads the OOB area, reads the data in chunks,
feeds the ECC from OOB area to the ECC hw engine and perform any
correction on the data as per the ECC status reported by the engine.

"ECC_HW_OOB_FIRST" name suggested by Thomas Gleixner

Reviewed-by: David Brownell 
Signed-off-by: Sneha Narnakaje 
Signed-off-by: Sandeep Paulraj 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse

mtd: nand: add "page" parameter to all read_page/read_page_raw APIs

2009-09-19T18:13:47+00:00

This patch adds a new "page" parameter to all NAND read_page/read_page_raw
APIs.  The read_page API for the new mode ECC_HW_OOB_FIRST requires the
page information to send the READOOB command and read the OOB area before
the data area.

Reviewed-by: David Brownell 
Signed-off-by: Sneha Narnakaje 
Signed-off-by: Sandeep Paulraj 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse

mtd: plat_nand: allow platform to set partitions

2009-06-05T17:11:55+00:00

Add optional callback to allow platform to initialize partitions.

Static partitions on a nand device could vary depending on the size of the
device.  This patch allows an optional platform callback to be used to
setup this partition information at runtime.

Scan order is:
	1) chip.part_probe_types
	2) chip.set_parts
	3) chip.partitions
	4) full mtd device (fallback for no partitions)

Some of the existing nand drivers could possibly be replaced by the
plat_nand driver by using this patch.  These include autcpu12.c and
ts7250.c drivers.

Signed-off-by: H Hartley Sweeten 
Signed-off-by: Andrew Morton 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: plat_nand: add platform probe/remove callbacks

2009-06-05T17:11:13+00:00

Add optional probe and remove callbacks to the plat_nand driver.

Some platforms may require additional setup, such as configuring the
memory controller, before the nand device can be accessed.  This patch
provides an optional callback to handle this setup as well as a callback
to teardown the setup.

Signed-off-by: H Hartley Sweeten 
Tested-by: Alexander Clouter 
Signed-off-by: Andrew Morton 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: extend plat_nand for (read|write)_buf

2009-06-05T16:50:52+00:00

This patch adds (write|read)_buf callbacks to plat_nand.

The NAND on the TS-7800 provisioned by the FPGA allows readw() and
readl() to be used which gives a 2.5x speed up.  To be able to use this
from the plat_nand driver a hook for read_buf (and also write_buf whilst
we are in there) need to be made available.  This patch adds the hook.

Signed-off-by: Alexander Clouter 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

[MTD] [NAND] Add support for 4KiB pages.

2009-04-06T14:01:56+00:00

Signed-off-by: Thomas Gleixner 
Signed-off-by: Sebastian Siewior 
Signed-off-by: David Woodhouse

[MTD] [NAND] remove excess kernel-doc notation

2008-12-10T16:10:40+00:00

Delete extra kernel-doc notation for struct fields and function
parameters that don't exist:

Warning(include/linux/mtd/nand.h:428): Excess struct/union/enum/typedef member 'wq' description in 'nand_chip'
Warning(include/linux/mtd/nand.h:428): Excess struct/union/enum/typedef member 'datbuf' description in 'nand_chip'
Warning(include/linux/mtd/nand.h:428): Excess struct/union/enum/typedef member 'oobbuf' description in 'nand_chip'
Warning(include/linux/mtd/nand.h:428): Excess struct/union/enum/typedef member 'oobdirty' description in 'nand_chip'
Warning(include/linux/mtd/nand.h:428): Excess struct/union/enum/typedef member 'data_poi' description in 'nand_chip'
Warning(drivers/mtd/nand/nand_base.c:2527): Excess function parameter 'maxchips' description in 'nand_scan_tail'

Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse

[MTD] update internal API to support 64-bit device size

2008-12-10T13:37:21+00:00

MTD internal API presently uses 32-bit values to represent
device size.  This patch updates them to 64-bits but leaves
the external API unchanged.  Extending the external API
is a separate issue for several reasons.  First, no one
needs it at the moment.  Secondly, whether the implementation
is done with IOCTLs, sysfs or both is still debated.  Thirdly
external API changes require the internal API to be accepted
first.

Note that although the MTD API will be able to support 64-bit
device sizes, existing drivers do not and are not required
to do so, although NAND base has been updated.

In general, changing from 32-bit to 64-bit values cause little
or no changes to the majority of the code with the following
exceptions:
    	- printk message formats
    	- division and modulus of 64-bit values
    	- NAND base support
	- 32-bit local variables used by mtdpart and mtdconcat
	- naughtily assuming one structure maps to another
	in MEMERASE ioctl

Signed-off-by: Adrian Hunter 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

[MTD] [NAND] Fix missing kernel-doc

2008-08-20T21:35:40+00:00

[Reported by Randy Dunlap]

Signed-off-by: Alexey Korolev 
Signed-off-by: David Woodhouse

[MTD] [NAND] fix subpage read for small page NAND

2008-07-30T10:59:24+00:00

Current implementation of subpage read feature for NAND has issues with
small page devices. Small page NAND do not support RNDOUT command.
So subpage feature is not applicable for them.

This patch disables support of subpage for small page NAND.
The code is verified on nandsim(SP NAND simulation) and on LP NAND
devices.

Thanks a lot to Artem for finding this issue.

Signed-off-by: Alexey Korolev 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse