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path: root/drivers/mtd/onenand
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2011-01-17Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: (59 commits) mtd: mtdpart: disallow reading OOB past the end of the partition mtd: pxa3xx_nand: NULL dereference in pxa3xx_nand_probe UBI: use mtd->writebufsize to set minimal I/O unit size mtd: initialize writebufsize in the MTD object of a partition mtd: onenand: add mtd->writebufsize initialization mtd: nand: add mtd->writebufsize initialization mtd: cfi: add writebufsize initialization mtd: add writebufsize field to mtd_info struct mtd: OneNAND: OMAP2/3: prevent regulator sleeping while OneNAND is in use mtd: OneNAND: add enable / disable methods to onenand_chip mtd: m25p80: Fix JEDEC ID for AT26DF321 mtd: txx9ndfmc: limit transfer bytes to 512 (ECC provides 6 bytes max) mtd: cfi_cmdset_0002: add support for Samsung K8D3x16UxC NOR chips mtd: cfi_cmdset_0002: add support for Samsung K8D6x16UxM NOR chips mtd: nand: ams-delta: drop omap_read/write, use ioremap mtd: m25p80: add debugging trace in sst_write mtd: nand: ams-delta: select for built-in by default mtd: OneNAND: lighten scary initial bad block messages mtd: OneNAND: OMAP2/3: add support for command line partitioning mtd: nand: rearrange ONFI revision checking, add ONFI 2.3 ... Fix up trivial conflict in drivers/mtd/Kconfig as per DavidW.
2011-01-06mtd: onenand: add mtd->writebufsize initializationAnatolij Gustschin
Initialize mtd->writebufsize to be equal to mtd->writesize. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-06mtd: OneNAND: OMAP2/3: prevent regulator sleeping while OneNAND is in useAdrian Hunter
Prevent OneNAND's voltage regulator from going to sleep while OneNAND is in use, by explicitly enabling and disabling the regulator as appropriate. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-06mtd: OneNAND: add enable / disable methods to onenand_chipAdrian Hunter
Add enable / disable methods called from get_device() / release_device(). These can be used, for example, to allow the driver to prevent the voltage regulator from being put to sleep while OneNAND is in use. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-06mtd: OneNAND: lighten scary initial bad block messagesAdrian Hunter
Initial bad blocks are normal but the messages look like errors. Make the messages less scary, make the main message an informational message not a warning, make the message displaying registers a debug message and include the address there instead of in the informational message. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-06mtd: OneNAND: OMAP2/3: add support for command line partitioningAdrian Hunter
Add the ability to parse MTD partition information from the kernel command line. Note that a pointless BUG_ON is removed, as are redundant calls to 'del_mtd_partitions()' and 'del_mtd_device()' because they are also done by 'onenand_release()'. Finally note that 'add_mtd_device()' returns 1 on failure so the error condition was incorrect. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-06mtd: OneNAND: Fix multi block erase support at 4KiB pagesizeKyungmin Park
Original 4KiB pagesize chip (SLC) doesn't support Multi block erase at Spec. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-12-21OMAP2/3: OneNAND: add 104MHz supportAdrian Hunter
Add GPMC timings for 104MHz OneNAND. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-03mtd: onenand: bugfix for 2x mode bad block handlingRoman Tereshonkov
This bug becomes visible in 2x mode when chip->writesize is different from mtd->writesize (= 2 * chip->writesize). At this case the bad block information is read from the first and the third physical pages instead of the first and the second as specification states. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-12-03mtd: OneNAND: Fix 4KiB pagesize OOB handlingKyungmin Park
Original 4KiB pagesize chip (SLC) doesn't support OOB operations at Spec. And it's also same at Flex-OneNAND. Remove the MLC macro if possible and use 4KiB pagesize macro since MLC has 4KiB pagesize. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-12-03mtd: onenand: implement cache program feature for 4KiB page onenandRoman Tereshonkov
Implement cache program feature for 4KiB page onenand. This feature improves the write data performance. The observed 128KiB data program speed change is from 8827KiB/s to 14156 KiB/s when the feature is enabled. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-12-03mtd: onenand: fix omap2 code to handle cache program featureRoman Tereshonkov
Some fixes are introduced into omap2 code to handle errors when cache program feature is used. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-12-03mtd: OneNAND: Fix page offset handling at 2KiB pagesizeKyungmin Park
When use the 2KiB pagesize, it should be set the correct page offset. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC110: Fix double call suspend & resume functionKyungmin Park
The suspend & resume called from mtd core. So no need to call at driver. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: onenand: fix 4KiB page onenand chip recognitionRoman Tereshonkov
For 4Gib non-DDP chip it does not follow that it is always 4KiB page chip. The number of data buffers is checked and if it is equal to 1 we suppose that it is 4KiB page onenand chip. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC210 OneNAND supportKyungmin Park
S5PC210 has the same OneNAND controller as S5PC110 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC110: Implement DMA interrupt methodKyungmin Park
Implement DMA interrupt method. previous time it polls the DMA status. It can reduce the CPU power but decrease the performance a little. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC110: Fix wrong DMA handling when HIGHMEMKyungmin Park
When use HIGHMEM, dma_map_single doesn't get the proper DMA address. So use the dma_map_page in this case. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC100: Only S5PC110 use the command map methodKyungmin Park
After S5PC110 use the generic method for OneNAND. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: MLC device check in OneNAND driverRohit Hassan Sathyanarayan
The MLC NAND Flash differs from the SLC NAND flash in functioning and the cell structure. Therefore we are considering it as a different Flash type. Signed-off-by: Rohit H.S <rohit.hs@samsung.com> Signed-off-by: Raghav Gupta <gupta.raghav@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25mtd: OneNAND: S5PC110: Add timeout to prevent the endless loopKyungmin Park
There's no case timeout but add it for some H/W problem or wrong codes implementation Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-24mtd: OneNAND: Remove unused cmd_map at s5pc110Kyungmin Park
S5PC110 OneNAND controller use the generic functions provided from onenand_base. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-09-13mtd: OneNAND: Fix loop hang when DMA error at Samsung SoCsKyungmin Park
When DMA error occurs. it's loop hang since it can't exit the loop. and it's the right DMA handling code as Spec. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-09-13mtd: OneNAND: Fix 2KiB pagesize handling at Samsung SoCsKyungmin Park
Wrong assumption bufferram can be switched between BufferRAM0 and BufferRAM1 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-08mtd: Remove obsolete <mtd/compatmac.h> includeDavid Woodhouse
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-04mtd: OneNAND: Samsung SoCs use own chip_probe functionKyungmin Park
Samsung SoCs use own chip_probe function. Don't touch the memory configuration at probe time. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-04mtd: OneNAND: Introduce chip_probe functionKyungmin Park
Samsung SoCs use the own OneNAND controler and detect OneNAND chip at power on. To use this feature, introduce the chip_probe function. Also remove workaround for Samsung SoCs. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-02mtd: onenand:fix for page addr calculation based on device typeRohit Hassan Sathyanarayan
Sending the patch for page address calculation based on device type. This resolves the OneNAND DDP device read problem as pointed by Enric. http://lists.infradead.org/pipermail/linux-mtd/2010-July/030920.html Signed-off-by: Rohit HS <rohit.hs@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-02mtd: remove redundant dependency checks in Kconfig filesKyle Spaans
Look for dependency checks for "FOO" when inside of an "if FOO" block and remove them. Signed-off-by: Kyle Spaans <kspaans@uwaterloo.ca> Reviewed-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14mtd: add Samsung SoC OneNAND driverKyungmin Park
This patch adds a driver for OneNAND controller on Samsung SoCs. Following SoCs are supported: S3C6400, S3C6410, S5PC100 and S5PC110. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14mtd: onenand: add workaround for SYNC_WRITE modeKyungmin Park
Some chips fails to identify properly when SYNC_WRITE mode is enabled (the example is OneNAND on S5PC110 SoC). This patch adds a workaround for such chips. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14mtd: onenand: add new callback for bufferram readKyungmin Park
This patch adds a new callback for the underlying drivers, which is called instead of accessing the buffer ram directly. This callback will be used by Samsung OneNAND driver to implement DMA transfers on S5PC110 SoC. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14mtd: onenand: allocate verify buffer in the coreKyungmin Park
This patch extends OneNAND core code with support for OneNAND verify write check. This is done by allocating the buffer for verify read directly from the core code. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14mtd: onenand: add support for chips with 4KiB page sizeKyungmin Park
This patch adds support for OneNAND chips that have 4KiB page size. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-10Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/mtd/mtdcore.c Pull in the bdi fixes and ARM platform changes that other outstanding patches depend on.
2010-05-10mtd: OneNAND: OMAP2/3: unmap correct DMA bufferMika Westerberg
Functions omap2_onenand_write_bufferram() and omap3_onenand_write_bufferram() map the write buffer and store the returned handle in variable dma_src. However, when DMA unmap is done, variable dma_dst is used instead of the correct dma_src. This patch fixes them to use the correct DMA buffer. Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Tested-by: Arnaud Ebalard <arno@natisbad.org> Acked-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-02-26mtd: OneNAND: do not use DMA if oops in progressAaro Koskinen
Otherwise we may hang if we are called from panic() through mtdoops. Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-12-16Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: (90 commits) jffs2: Fix long-standing bug with symlink garbage collection. mtd: OneNAND: Fix test of unsigned in onenand_otp_walk() mtd: cfi_cmdset_0002, fix lock imbalance Revert "mtd: move mxcnd_remove to .exit.text" mtd: m25p80: add support for Macronix MX25L4005A kmsg_dump: fix build for CONFIG_PRINTK=n mtd: nandsim: add support for 4KiB pages mtd: mtdoops: refactor as a kmsg_dumper mtd: mtdoops: make record size configurable mtd: mtdoops: limit the maximum mtd partition size mtd: mtdoops: keep track of used/unused pages in an array mtd: mtdoops: several minor cleanups core: Add kernel message dumper to call on oopses and panics mtd: add ARM pismo support mtd: pxa3xx_nand: Fix PIO data transfer mtd: nand: fix multi-chip suspend problem mtd: add support for switching old SST chips into QRY mode mtd: fix M29W800D dev_id and uaddr mtd: don't use PF_MEMALLOC mtd: Add bad block table overrides to Davinci NAND driver ... Fixed up conflicts (mostly trivial) in drivers/mtd/devices/m25p80.c drivers/mtd/maps/pcmciamtd.c drivers/mtd/nand/pxa3xx_nand.c kernel/printk.c
2009-12-16mtd: OneNAND: Fix test of unsigned in onenand_otp_walk()Roel Kluin
mtd->writesize and len are unsigned so the test does not work. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-12-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (42 commits) tree-wide: fix misspelling of "definition" in comments reiserfs: fix misspelling of "journaled" doc: Fix a typo in slub.txt. inotify: remove superfluous return code check hdlc: spelling fix in find_pvc() comment doc: fix regulator docs cut-and-pasteism mtd: Fix comment in Kconfig doc: Fix IRQ chip docs tree-wide: fix assorted typos all over the place drivers/ata/libata-sff.c: comment spelling fixes fix typos/grammos in Documentation/edac.txt sysctl: add missing comments fs/debugfs/inode.c: fix comment typos sgivwfb: Make use of ARRAY_SIZE. sky2: fix sky2_link_down copy/paste comment error tree-wide: fix typos "couter" -> "counter" tree-wide: fix typos "offest" -> "offset" fix kerneldoc for set_irq_msi() spidev: fix double "of of" in comment comment typo fix: sybsystem -> subsystem ...
2009-11-30mtd: OneNAND: fix double printing of function nameMika Korhonen
Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com> Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-30mtd: OneNAND: multiblock erase supportMika Korhonen
Add support for multiblock erase command. OneNANDs (excluding Flex-OneNAND) are capable of simultaneous erase of up to 64 eraseblocks which is much faster. This changes the erase requests for regions covering multiple eraseblocks to be performed using multiblock erase. Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com> Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-30mtd: OneNAND: move erase method to a separate functionMika Korhonen
Separate the actual execution of erase to a new function: onenand_block_by_block_erase(). This is done in preparation for the multiblock erase support. Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com> Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-30mtd: OneNAND OTP support reworkAmul Kumar Saha
What is OTP in OneNAND? The device includes, 1. one block-sized OTP (One Time Programmable) area and 2. user-controlled 1st block OTP(Block 0) that can be used to increase system security or to provide identification capabilities. What is done? In OneNAND, one block of the NAND Array is set aside as an OTP memory area, and 1st Block (Block 0) can be used as OTP area. This area, available to the user, can be configured and locked with secured user information. The OTP block can be read, programmed and locked using the same operations as any other NAND Flash Array memory block. After issuing an OTP-Lock, OTP block cannot be erased. OTP block is fully-guaranteed to be a good block. Why it is done? Locking the 1st Block OTP has the effect of a 'Write-protect' to guard against accidental re-programming of data stored in the 1st block and OTP Block. Which problem it solves? OTP support is provided in the existing implementation of OneNAND/Flex-OneNAND driver, but it is not working with OneNAND devices. Have observed the following in current OTP OneNAND Implmentation, 1. DataSheet specific sequence to lock the OTP Area is not followed. 2. Certain functions are quiet generic to cope with OTP specific activity. This patch re-implements OTP support for OneNAND device. How it is done? For all blocks, 8th word is available to the user. However, in case of OTP Block, 8th word of sector 0, page 0 is reserved as OTP Locking Bit area. Therefore, in case of OTP Block, user usage on this area is prohibited. Condition specific values are entered in the 8th word, sector0, page 0 of the OTP block during the process of issuing an OTP-Lock. The possible conditions are: 1. Only 1st Block Lock 2. Only OTP Block Lock 3. Lock both the 1st Block and the OTP Block What Other feature additions have been done in this patch? This patch adds feature for: 1. Only 1st Block Lock 2. Lock both the 1st Block and the OTP Blocks Re-implemented OTP support for OneNAND Added following features to OneNAND 1. Lock only 1st Block in OneNAND 2. Lock BOTH 1st Block and OTP Block in OneNAND [comments were slightly tweaked by Artem] Signed-off-by: Amul Kumar Saha <amul.saha@samsung.com> Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-09Kconfig: Remove useless and sometimes wrong commentsMichael Roth
Additionally, some excessive newlines removed. Signed-off-by: Michael Roth <mroth@nessie.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-10-20omap: headers: Move remaining headers from include/mach to include/platTony Lindgren
Move the remaining headers under plat-omap/include/mach to plat-omap/include/plat. Also search and replace the files using these headers to include using the right path. This was done with: #!/bin/bash mach_dir_old="arch/arm/plat-omap/include/mach" plat_dir_new="arch/arm/plat-omap/include/plat" headers=$(cd $mach_dir_old && ls *.h) omap_dirs="arch/arm/*omap*/ \ drivers/video/omap \ sound/soc/omap" other_files="drivers/leds/leds-ams-delta.c \ drivers/mfd/menelaus.c \ drivers/mfd/twl4030-core.c \ drivers/mtd/nand/ams-delta.c" for header in $headers; do old="#include <mach\/$header" new="#include <plat\/$header" for dir in $omap_dirs; do find $dir -type f -name \*.[chS] | \ xargs sed -i "s/$old/$new/" done find drivers/ -type f -name \*omap*.[chS] | \ xargs sed -i "s/$old/$new/" for file in $other_files; do sed -i "s/$old/$new/" $file done done for header in $(ls $mach_dir_old/*.h); do git mv $header $plat_dir_new/ done Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-10-05mtd: make onenand_base.c compile againDavid Woodhouse
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-10-05mtd: Standardising prints in onenand_base.cAmul Kumar Saha
This patch resolves all the prints present in onenand_base.c Primarily, it replaces the hard-coded function names in the prints, and makes use of __func__. Signed-off-by: Amul Kumar Saha <amul.saha@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-09-19mtd: onenand: make onenand/generic.c more genericMagnus Damm
Remove the ARM dependency from the generic "onenand" platform device driver. This change makes the driver useful for other architectures as well. Needed for the SuperH kfr2r09 board. Apart from the obvious Kconfig bits, the most important change is the move away from ARM specific includes and platform data. Together with this change the only in-tree board code gets an update, and the driver name is also changed gracefully break potential out of tree drivers. The driver is also updated to allow NULL as platform data together with a few changes to make use of resource_size() and dev_name(). Signed-off-by: Magnus Damm <damm@igel.co.jp> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Tony Lindgren <tony@atomide.com> Cc: Kyungmin Park <kmpark@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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