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path: root/drivers/mtd/nand
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2008-08-07[ARM] Remove asm/hardware.h, use asm/arch/hardware.h insteadRussell King
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-25[MTD] [NAND] subpage read feature as a way to increase performance. Alexey Korolev
This patch enables NAND subpage read functionality. If upper layer drivers are requesting to read non page aligned data NAND subpage-read functionality reads the only whose ECC regions which include requested data when original code reads whole page. This significantly improves performance in many cases. Here are some digits : UBI volume mount time No subpage reads: 5.75 seconds Subpage read patch: 2.42 seconds Open/stat time for files on JFFS2 volume: No subpage read 0m 5.36s Subpage read 0m 2.88s Signed-off-by Alexey Korolev <akorolev@infradead.org> Acked-by: Artem Bityutskiy <dedekind@infradead.org> Acked-by: Jörn Engel <joern@logfs.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-25Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6David Woodhouse
2008-07-25CPUFREQ: S3C24XX NAND driver frequency scaling support.Ben Dooks
Add support for CPU frequency scalling to the S3C24XX NAND driver. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-25[MTD][NAND] au1550nd: remove unused variableYoichi Yuasa
Remove unused variable from au1550 NAND driver. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-25[MTD] [NAND] fsl_elbc_nand: fix section mismatch with CONFIG_MTD_OF_PARTS=yAnton Vorontsov
With CONFIG_MTD_OF_PARTS=y I'm getting this new section mismatch in reference from the function fsl_elbc_chip_probe() to the function .devinit.text:of_mtd_parse_partitions() This patch fixes the mismatch by providing __devinit annotation to the fsl_elbc_chip_probe() function. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-By: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-13Merge branch 'pxa' into develRussell King
Conflicts: arch/arm/configs/em_x270_defconfig arch/arm/configs/xm_x270_defconfig
2008-07-12Merge branches 'pxa-ian' and 'pxa-xm270' into pxaRussell King
Conflicts: MAINTAINERS
2008-07-11[MTD] [NAND] remove __PPC__ hardcoded address from DiskOnChip driversMilton Miller
Such a hardcoded address can cause a checkstop or machine check if the driver is in the kernel but the address is not acknowledged. Both drivers allow an address to be specified as either a module parameter or config option. Any future powerpc board should either use one of these methods or find the address in the device tree. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] fsl_elbc_nand: ecclayout cleanupsAnton Vorontsov
This patch deletes oobavail assignments, they're calculated by the nand core code in nand_scan_tail, plus current oobavail values are wrong for the LP NANDs. Also remove mtd->ecclayout and mtd->oobavail assignments, mtd core handles this all by itself. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] fsl_elbc_nand: implement support for flash-based BBTAnton Vorontsov
This patch implements support for flash-based BBT for chips working through ELBC NAND controller, so that NAND core will not have to re-scan for bad blocks on every boot. Because ELBC controller may provide HW-generated ECCs we should adjust bbt pattern and bbt version positions in the OOB free area. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] fsl_elbc_nand: fix OOB workability for large page NAND chipsAnton Vorontsov
For large page chips, nand_bbt is looking into OOB area, and checking for "0xff 0xff" pattern at OOB offset 0. That is, two bytes should be reserved for bbt means. But ELBC driver is specifying ecclayout so that oobfree area starts at offset 1, so only one byte left for the bbt purposes. This causes problems with any OOB users, namely JFFS2: after first mount JFFS2 will fill all OOBs with "erased marker", so OOBs will contain: OOB Data: ff 19 85 20 03 00 ff ff ff 00 00 08 ff ff ff ff OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff And on the next boot, NAND core will rescan for bad blocks, then will see "0xff 0x19" pattern, and will mark all blocks as bad ones. To fix the issue we should implement our own bad block pattern: just one byte at OOB start. Though, this will work only for x8 chips. For x16 chips two bytes must be checked. Since ELBC driver does not support x16 NANDs (yet), we're safe for now. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] atmel_nand can be modularDavid Brownell
There's no reason to prevent the Atmel NAND driver from building as a module. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] atmel_nand: Work around AT32AP7000 ECC erratumHaavard Skinnemoen
The ALE signal isn't correctly wired up to the ECC controller on the AP7000, so it starts calculating ECC during the address cycles. Work around this by resetting the ECC controller between the address and data cycles. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11[MTD] [NAND] atmel_nand speedup via {read,write}s{b,w}()David Brownell
This uses __raw_{read,write}s{b,w}() primitives to access data on NAND chips for more efficient I/O. On an arm926 with memory clocked at 100 MHz, this reduced the elapsed time for a 64 MiB read by 16%. ("dd" /dev/mtd0 to /dev/null, with an 8-bit NAND using hardware ECC and 128KiB blocksize.) Also some minor section tweaks: - Use platform_driver_probe() so no pointer to probe() lingers after that code has been removed at run-time. - Use __exit and __exit_p so the remove() code will normally be removed by the linker. Since these buffer read/write calls are new, this increases the runtime code footprint (by 88 bytes on my build, after the section tweaks). [haavard.skinnemoen@atmel.com: rebase onto atmel_nand rename] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2008-07-09[ARM] 5105/1: CM-X270: update NAND flash driver to use gpio_libMike Rapoport
Update CM-X270 NAND flash driver to use gpio_lib. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-30[MTD] orion_nand: add chip_delay parameterSaeed Bishara
Some SoCs need a different chip_delay value. Signed-off-by: Saeed Bishara <saeed@marvell.com> Acked-by: Jörn Engel <joern@logfs.org> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-06-07[MTD] [NAND] Fix checkpatch warnings which showed up when atmel_nand.c movedDavid Woodhouse
Some of them, at least. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] atmel_nand: make available on AVR32Håvard Skinnemoen
Make the atmel_nand driver selectable on AVR32, and update the Kconfig help text to reflect this. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] atmel_nand: Clean up and fix probe() error pathHåvard Skinnemoen
This fixes several bugs in the atmel_nand_probe() error path, including at least one memory leak. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] rename at91_nand -> atmel_nand: internal symbolsHåvard Skinnemoen
This is basically s/at91_nand/atmel_nand/g with some manual inspection. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] rename at91_nand -> atmel_nand: file names and KconfigHåvard Skinnemoen
The AT91 NAND driver needs just a few tiny modifications to work on AVR32 as well. Rename it atmel_nand to reflect this. Also move the ECC register definitions into drivers/mtd/nand since they are only useful to the atmel_nand driver, and get rid of the useless filename at the top of each file. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] at91_nand: Convert to generic GPIO APIHåvard Skinnemoen
No point in using an AT91-specific GPIO API when the generic API works just as well. Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07[MTD] [NAND] fsl_elbc_nand: fix section mismatch between probe and removeAnton Vorontsov
WARNING: drivers/mtd/nand/built-in.o(.devinit.text+0x114): Section mismatch in reference from the function fsl_elbc_ctrl_probe() to the function .devexit.text:fsl_elbc_ctrl_remove() __devinit functions should not call functions with __devexit. Since probe function calls remove in case of errors, we want to remove __devexit attribute from it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-05[MTD] [NAND] nandsim: missing header for do_divRandy Dunlap
Fix nandsim build error, missing #include: linux-next-20080605/drivers/mtd/nand/nandsim.c: In function 'divide': linux-next-20080605/drivers/mtd/nand/nandsim.c:462: error: implicit declaration of function 'do_div' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] S3C2410: Remove changelog and tidy headerBen Dooks
The changelog on the driver is superflous given this is being kept under revision control. Remove the other cruft in the header and update the copyright and the supported device list. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] S3C2410: Change printk() into dev_dbg()Ben Dooks
Fix a minor problem with what should have been debug output by changing printk() to dev_dbg() inside s3c2410_nand_update_chip(). Thanks to David Woodhouse for pointing this out. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04MTD/JFFS2: remove CVS keywordsAdrian Bunk
Once upon a time, the MTD repository was using CVS. This patch therefore removes all usages of the no longer updated CVS keywords from the MTD code. This also includes code that printed them to the user. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] nandsim: allow for 64-bit sizeAdrian Hunter
Amend nandsim so that it does not assume 32-bit flash size. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] nandsim: fix overridesizeAdrian Hunter
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] nandsim: fix size bugAdrian Hunter
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] pxa: fix incorrect calling of pxa3xx_nand_config() on resume pathEric Miao
Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] excite_nandflash: simplify code using ARRAY_SIZE() macro.Robert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04[MTD] [NAND] fix 2 "unused variable" warnings in cafe_nand.cToralf Förster
Signed-off-by: Toralf Förster <toralf.foerster@gmx.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-26[MTD] [NAND] at91_nand: use at91_nand_{en,dis}able consistently.Atsushi Nemoto
Use at91_nand_enable(), at91_nand_disable() to manipulate enable_pin. No functional changes. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-25[MTD] [NAND] bf5xx_nand: Avoid crash if bfin_mac is installed.Michael Hennerich
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=4053 Singed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-25[MTD] [NAND] at91_nand: control NCE signalAtsushi Nemoto
This driver did not control NCE signal during normal operations (only enable NCE on probing and disable NCE on removing). This patch make NCE signal inactive on idle state. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-25[MTD] [NAND] AT91 hardware ECC compile fix for at91sam9263 / at91sam9260Richard Genoud
The sam926x docs allegedly don't list an "ECC_PARITY" field, and the header files in the upstream kernel don't have it either. Masking with it was useless anyway, so just remove it. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23[MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260Richard Genoud
This is a patch to use the hardware ECC controller of the AT91SAM9260 and AT91SAM9263 for the AT91 nand. On AT91 NAND, there's now a choice between ECC soft, ECC hard or no ECC (for debug). It has been tested on AT91SAM9263 with 8 bits large and small page NAND. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] Verify probe by retrying to checking the results matchBen Dooks
With modern systems using bus-hold instead of bus pull-up, it can often lead to erroneous reporting of NAND devices where there are none. Do a double probe to ensure that the result we got the first time is repeatable, and if it is not then return that there is no chip there. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] S3C2410 Allow ECC disable to be specified by the boardBen Dooks
Add support to disable ECC checking for a given chip when passed by the board via the platform data. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] S3C2410 Allow ECC layout to be passed through platform dataBen Dooks
Add support for the ECC layout to be passed via the platform data specified by the board. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] S3C2410 Allow unset ecc to be ignored for ecc correctionBen Dooks
If a block's ecc field is all 0xff, then ignore the ECC correction. This is for systems where some of the blocks, such as the initial cramfs are written without ECC and need to be loaded on start. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] S3C2410 Large page NAND supportBen Dooks
This adds support for using large page NAND devices with the S3C24XX NAND controller. This also adds the file Documentation/arm/Samsung-S3C24XX/NAND.txt to describe the differences. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] S3C2410 Fix previous nFCE suspend save patchBen Dooks
Commit 03680b1e00d146df718c8a4eac34438566b70c85 incorrectly was assuming S3C2410_NFCONF was being used to select the NAND chip. Fix this error by ising the sel_reg. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] fsl_elbc_nand: workaround for hangs during nand writeAnton Vorontsov
Using current driver elbc sometimes hangs during nand write. Reading back last byte helps though (thanks to Scott Wood for the idea). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] plat_nand: set mtd->nameHamish Moffatt
This patch sets mtd->name to the platform bus ID in the plat_nand driver, so that you can specify partitions readily with mtdparts=. Currently it relies on nand_base filling in the name from the device, which results in names like "NAND 256MiB 3,3V 8-bit", that you can't use with cmdlineparts. Signed-off-by: Hamish Moffatt <hamish@cloud.net.au> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] corrected MPC8313 NAND fixesMike Hench
Fix a race condition in fsl_elbc_run_command Fix incorrect usage of clearbits32 that bashed option register Remove work around for bashed register Signed-off-by: Mike Hench <mhench@elutions.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22[MTD] [NAND] fsl_elbc_nand: fix mtd nameAnton Vorontsov
Currently fsl_elbc_nand doesn't initialize mtd->name, and this causes nand_get_flash_type() to assign name that is equal to chip type, like this: root@b1:~# cat /proc/mtd dev: size erasesize name mtd0: 00800000 00010000 "fe000000.flash" mtd1: 02000000 00004000 "NAND 32MiB 3,3V 8-bit" mtd0 is physmap_of flash (normal name), and mtd1 is fsl_elbc_nand. Despite inconsistency, with mtd name like this specifying paritions from the kernel command line becomes a torture (though, I didn't tried and not sure if mtdparts= can handle spaces at all). Plus, this causes real bugs when multiple fsl_elbc_nand chips registered. With this patch applied fsl_elbc_nand chip will have proper name: root@b1:~# cat /proc/mtd dev: size erasesize name mtd0: 00800000 00010000 "fe000000.flash" mtd1: 02000000 00004000 "e0600000.flash" p.s. We can't use priv->dev->bus_id as in physmap_of, because fsl_elbc_nand pretends to be a localbus controller, so its bus_id is "address.localbus", which is incorrect and thus will also not work for multiple chips. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>