u-boot.git/drivers/mtd/nand, branch v2011.09

NAND: Add 16bit NAND support for the NDFC

2011-07-01T20:56:52Z

This patch adds support for 16 bit NAND devices attached to the NDFC on ppc4xx processors. Two config entries were added: CONFIG_SYS_NDFC_16 - Setting this tells the NDFC that a 16 bit device is attached. CONFIG_SYS_NDFC_EBC0_CFG - This is for the External Bus Controller configuration register. Also, a new ndfc_read_byte() function was added which does not first convert the data to little endian. The NAND SPL was also modified to do 16bit bad block testing when a 16 bit chip is being used. Signed-off-by: Alex Waterman Signed-off-by: Scott Wood

nand_util: drop trailing all-0xff pages if requested

2011-07-01T20:56:51Z

Add a flag to nand_read_skip_bad() such that if true, any trailing pages in an eraseblock whose contents are entirely 0xff will be dropped. The implementation is via a new drop_ffs() function which is based on the function of the same name from the ubiformat utility by Artem Bityutskiy. This is as-per the reccomendations of the UBI FAQ [1] [1] http://www.linux-mtd.infradead.org/doc/ubi.html#L_flasher_algo Signed-off-by: Ben Gardiner CC: Artem Bityutskiy Acked-by: Detlev Zundel CC: Scott Wood Signed-off-by: Scott Wood

nand_util: treat WITH_YAFFS_OOB as a mode

2011-07-01T20:56:51Z

When specified in the flags argument of nand_write, WITH_YAFFS_OOB causes an operation which is mutually exclusive with the 'usual' way of writing. Add a check that client code does not specify WITH_YAFFS_OOB along with any other flags and add a comment indicating that the WITH_YAFFS_OOB flag should not be mixed with other flags. Signed-off-by: Ben Gardiner CC: Scott Wood Signed-off-by: Scott Wood

nand_util: convert nand_write_skip_bad() to flags

2011-07-01T20:56:51Z

In a future commit the behaviour of nand_write_skip_bad() will be further extended. Convert the only flag currently passed to the nand_write_ skip_bad() function to a bitfield of only one allocated member. This should avoid an explosion of int's at the end of the parameter list or the ambiguous calls like nand_write_skip_bad(info, offset, len, buf, 0, 1, 1); nand_write_skip_bad(info, offset, len, buf, 0, 1, 0); Instead there will be: nand_write_skip_bad(info, offset, len, buf, WITH_YAFFS_OOB | WITH_OTHER); Signed-off-by: Ben Gardiner Acked-by: Detlev Zundel Signed-off-by: Scott Wood

nand_base: trivial: fix comment read/write comment

2011-07-01T20:56:51Z

Replace an incorrect 'read' with 'write' in a comment. Signed-off-by: Ben Gardiner Acked-by: Detlev Zundel Signed-off-by: Scott Wood

NAND: rearrange ONFI revision checking, add ONFI 2.3

2011-04-15T20:53:11Z

This patch sync with Brian's patch on Linux in nand_flash_detect_onfi() commit b7b1a29d94c17e4341856381bccb4d17495bea60 Author: Brian Norris Date: Sun Dec 12 00:23:33 2010 -0800 mtd: nand: rearrange ONFI revision checking, add ONFI 2.3 In checking for the ONFI revision, the first conditional (for checking "unsupported" ONFI) seems unnecessary. All ONFI revisions should be backwards-compatible; even if this is not the case on some newer ONFI revision, it should simply fail the second version-checking if-else block (i.e., the bit-fields for 1.0, 2.0, etc. would not be set to 1). Thus, we move our "unsupported" condition after having checked each bit field. Also, it's simple enough to add a condition for ONFI revision 2.3. Note that this does *NOT* mean we handle all new features of ONFI versions above 1.0. Signed-off-by: Brian Norris Acked-by: Florian Fainelli Signed-off-by: David Woodhouse Signed-off-by: Florian Fainelli

NAND: Fix integer overflow in ONFI detection of chips >= 4GiB

2011-04-15T20:53:11Z

This patch sync with David's patch on Linux in nand_flash_detect_onfi() commit 4ccb3b4497ce01fab4933704fe21581e30fda1a5 Author: David Woodhouse Date: Fri Dec 3 16:36:34 2010 +0000 mtd: nand: Fix integer overflow in ONFI detection of chips >= 4GiB Signed-off-by: David Woodhouse Signed-off-by: Florian Fainelli

atmel_nand: don't require CONFIG_SYS_NAND_ENABLE_PIN

2011-04-01T19:49:08Z

If NCE is hooked up to NCS3, we don't need to (and can't) explicitly set the state of the NCE pin. Instead, the controller asserts it automatically as part of a command/data access. Only "CE don't care"-type NAND chips can be used in this manner. Signed-off-by: Michael Trimarchi Cc: Scott Wood Cc: Reinhard Meyer

NAND: add support for reading ONFI page table

2011-04-01T19:49:08Z

This patch adds support for reading an ONFI page parameter from a NAND device supporting it. If this is the case, struct nand_chip onfi_version member contains the supported ONFI version, 0 otherwise. This allows NAND drivers past nand_scan_ident to set the best timings for the NAND chip. Signed-off-by: Florian Fainelli Signed-off-by: Scott Wood

NAND: add more watchdog resets

2011-04-01T19:49:08Z

Poke the watchdog in a variety of looping constructs, which could take a long time to complete. Signed-off-by: Scott Wood