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* mtd: sm_ftl: remove CONFIG_SM_FTL_MUSEUM and make it always onMaxim Levitsky2010-03-261-9/+0
| | | | | | | | | The sole purpose of this setting was to avoid a dependency on MTD_NAND. Now that we can depend on MTD_NAND_ECC without pulling in all the rest of the NAND code, we might as well do so unconditionally. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: nand: split out ECC moduleMaxim Levitsky2010-03-261-1/+2
| | | | | | | This way drivers could use ecc routines without depedency on whole nand Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: Make SM_FTL depend on MTD_NANDDavid Woodhouse2010-03-081-5/+5
| | | | | | | | | | | | | | | | | | | Randy Dunlap observed a build problem with the following config: CONFIG_SM_FTL=y CONFIG_SM_FTL_MUSEUM=y CONFIG_MTD_NAND=m The ECC calculation routines are then built as a module, but referenced by the sm_ftl code in the kernel, resulting in a build failure. The simple fix is to make CONFIG_SM_FTL depend on MTD_NAND unconditionally -- it's pointless without hardware support anyway. Fix some typos which Randy pointed out, too. Reported-By: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: Add new SmartMedia/xD FTLMaxim Levitsky2010-02-261-0/+21
| | | | | | | | | | | | | This implements new readwrite SmartMedia/xd FTL. mtd driver must have support proper ECC and badblock verification based on oob parts for 512 bytes nand. Also mtd driver must define read_oob and write_oob, which are used to read and write both data and oob together. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds2009-09-241-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (24 commits) microblaze: Disable heartbeat/enable emaclite in defconfigs microblaze: Support simpleImage.dts make target microblaze: Fix _start symbol to physical address microblaze: Use LOAD_OFFSET macro to get correct LMA for all sections microblaze: Create the LOAD_OFFSET macro used to compute VMA vs LMA offsets microblaze: Copy ppc asm-compat.h for clean handling of constants in asm and C microblaze: Actually show KiB rather than pages in "Freeing initrd memory:" microblaze: Support ptrace syscall tracing. microblaze: Updated CPU version and FPGA family codes in PVR microblaze: Generate correct signal and siginfo for integer div-by-zero microblaze: Don't be noisy when userspace causes hardware exceptions microblaze: Remove ipc.h file which points to non-existing asm-generic file microblaze: Clear sticky FSR register after generating exception signals microblaze: Ensure CPU usermode is set on new userspace processes microblaze: Use correct kbuild variable KBUILD_CFLAGS microblaze: Save and restore msr in hw exception microblaze: Add architectural support for USB EHCI host controllers microblaze: Implement include/asm/syscall.h. microblaze: Improve checking mechanism for MSR instruction microblaze: Add checking mechanism for MSR instruction ...
| * mtd: Enable Open Firmware initialisation of MTD devices and maps for MicroBlazeJohn Williams2009-09-211-1/+1
| | | | | | | | Signed-off-by: Michal Simek <monstr@monstr.eu>
* | mtd: fix order of TEST/PARTITIONS kconfig optionsMike Frysinger2009-09-191-8/+8
|/ | | | | | | | | | The MTD_TEST config option was added in between the MTD_PARTITIONS config and its dependent options which causes the resulting menu system to display incorrectly as MTD_TEST does not depend on MTD_PARTITIONS. So move it up a few lines where it won't cause a problem. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* trivial: mtd: fix Kconfig comment about 'armflash'Paulius Zaleckas2009-06-121-1/+2
| | | | | | | The real 'armflash' map driver is selected by CONFIG_MTD_ARM_INTEGRATOR Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Merge branch 'master' of git://git.infradead.org/users/dedekind/mtd-tests-2.6David Woodhouse2009-01-051-0/+8
|\ | | | | | | | | Conflicts: drivers/mtd/Makefile
| * MTD: add MTD tests to compilationArtem Bityutskiy2008-12-101-0/+8
| | | | | | | | | | | | Add MTD tests to Kconfig and Makefiles. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | [MTD] LPDDR Makefile and KConfigAlexey Korolev2009-01-051-0/+2
|/ | | | | | | | | | We have two components to manage LPDDR flash memories in Linux. 1. It is a driver for chip probing and reading its capabilities 2. It is a device operations driver. Signed-off-by: Alexey Korolev <akorolev@infradead.org> Acked-by: Jared Hulbert <jaredeh@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* [MTD] dataflash OTP supportDavid Brownell2008-08-011-0/+5
| | | | | | | | | | | | | | | Now that we can tell when we have one of the newer DataFlash chips, optionally expose the 128 bytes of OTP memory they provide. Tested on at45db642 revision B and D chips. Switch mtdchar over to a generic HAVE_MTD_OTP flag instead of adding another #ifdef for each type of chip whose driver has OTP support. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Bryan Wu <cooloney@kernel.org> Cc: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* MTD/JFFS2: remove CVS keywordsAdrian Bunk2008-06-041-2/+0
| | | | | | | | | | | | 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>
* [MTD] AR7 mtd partition mapMatteo Croce2008-04-221-0/+6
| | | | | | | Signed-off-by: Matteo Croce <technoboy85@gmail.com> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Eugene Konev <ejka@imfi.kspu.ru> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Factor out OF partition support from the NOR driver.Scott Wood2008-02-031-0/+8
| | | | | Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Document usage in KconfigPeter Korsgaard2007-12-031-0/+3
| | | | | | | Add usage instructions to Kconfig for mtdoops driver. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] oops and panic message logging to MTD deviceRichard Purdie2007-06-281-0/+8
| | | | | | | | | | | | | | | | | | Kernel oops and panic messages are invaluable when debugging crashes. These messages often don't make it to flash based logging methods (say a syslog on jffs2) due to the overheads involved in writing to flash. This patch allows you to turn an MTD partition into a circular log buffer where kernel oops and panic messages are written to. The messages are obtained by registering a console driver and checking oops_in_progress. Erases are performed in advance to maximise the chances of a saving messages. To activate it, add console=ttyMTDx to the kernel commandline (where x is the mtd device number to use). Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [S390] Kconfig: menus with depends on HAS_IOMEM.Martin Schwidefsky2007-05-101-0/+1
| | | | | | | Add "depends on HAS_IOMEM" to a number of menus to make them disappear for s390 which does not have I/O memory. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'master' of ↵David Woodhouse2007-04-271-0/+2
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/mtd/Kconfig Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * UBI: Unsorted Block ImagesArtem B. Bityutskiy2007-04-271-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UBI (Latin: "where?") manages multiple logical volumes on a single flash device, specifically supporting NAND flash devices. UBI provides a flexible partitioning concept which still allows for wear-levelling across the whole flash device. In a sense, UBI may be compared to the Logical Volume Manager (LVM). Whereas LVM maps logical sector numbers to physical HDD sector numbers, UBI maps logical eraseblocks to physical eraseblocks. More information may be found at http://www.linux-mtd.infradead.org/doc/ubi.html Partitioning/Re-partitioning An UBI volume occupies a certain number of erase blocks. This is limited by a configured maximum volume size, which could also be viewed as the partition size. Each individual UBI volume's size can be changed independently of the other UBI volumes, provided that the sum of all volume sizes doesn't exceed a certain limit. UBI supports dynamic volumes and static volumes. Static volumes are read-only and their contents are protected by CRC check sums. Bad eraseblocks handling UBI transparently handles bad eraseblocks. When a physical eraseblock becomes bad, it is substituted by a good physical eraseblock, and the user does not even notice this. Scrubbing On a NAND flash bit flips can occur on any write operation, sometimes also on read. If bit flips persist on the device, at first they can still be corrected by ECC, but once they accumulate, correction will become impossible. Thus it is best to actively scrub the affected eraseblock, by first copying it to a free eraseblock and then erasing the original. The UBI layer performs this type of scrubbing under the covers, transparently to the UBI volume users. Erase Counts UBI maintains an erase count header per eraseblock. This frees higher-level layers (like file systems) from doing this and allows for centralized erase count management instead. The erase counts are used by the wear-levelling algorithm in the UBI layer. The algorithm itself is exchangeable. Booting from NAND For booting directly from NAND flash the hardware must at least be capable of fetching and executing a small portion of the NAND flash. Some NAND flash controllers have this kind of support. They usually limit the window to a few kilobytes in erase block 0. This "initial program loader" (IPL) must then contain sufficient logic to load and execute the next boot phase. Due to bad eraseblocks, which may be randomly scattered over the flash device, it is problematic to store the "secondary program loader" (SPL) statically. Also, due to bit-flips it may become corrupted over time. UBI allows to solve this problem gracefully by storing the SPL in a small static UBI volume. UBI volumes vs. static partitions UBI volumes are still very similar to static MTD partitions: * both consist of eraseblocks (logical eraseblocks in case of UBI volumes, and physical eraseblocks in case of static partitions; * both support three basic operations - read, write, erase. But UBI volumes have the following advantages over traditional static MTD partitions: * there are no eraseblock wear-leveling constraints in case of UBI volumes, so the user should not care about this; * there are no bit-flips and bad eraseblocks in case of UBI volumes. So, UBI volumes may be considered as flash devices with relaxed restrictions. Where can it be found? Documentation, kernel code and applications can be found in the MTD gits. What are the applications for? The applications help to create binary flash images for two purposes: pfi files (partial flash images) for in-system update of UBI volumes, and plain binary images, with or without OOB data in case of NAND, for a manufacturing step. Furthermore some tools are/and will be created that allow flash content analysis after a system has crashed.. Who did UBI? The original ideas, where UBI is based on, were developed by Andreas Arnez, Frank Haverkamp and Thomas Gleixner. Josh W. Boyer and some others were involved too. The implementation of the kernel layer was done by Artem B. Bityutskiy. The user-space applications and tools were written by Oliver Lohmann with contributions from Frank Haverkamp, Andreas Arnez, and Artem. Joern Engel contributed a patch which modifies JFFS2 so that it can be run on a UBI volume. Thomas Gleixner did modifications to the NAND layer. Alexander Schmidt made some testing work as well as core functionality improvements. Signed-off-by: Artem B. Bityutskiy <dedekind@linutronix.de> Signed-off-by: Frank Haverkamp <haver@vnet.ibm.com>
* | Use menuconfig objects: MTDJan Engelhardt2007-04-191-18/+12
|/ | | | | | | | | Use menuconfigs instead of menus, so the whole menu can be disabled at once instead of going through all options. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] add MTD_BLKDEVS Kconfig optionJosh Boyer2006-11-291-0/+12
| | | | | | | Add a MTD_BLKDEVS Kconfig option to cleanup the makefile a bit Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
* [MTD] SSFDC must depend on BLOCKAdrian Bunk2006-10-091-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following compile error with CONFIG_SSFDC=m, CONFIG_BLOCK=n: <-- snip --> ... CC [M] drivers/mtd/mtd_blkdevs.o /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:40: warning: ‘struct request’ declared inside parameter list /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:40: warning: its scope is only this definition or declaration, which is probably not what you want /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c: In function ‘do_blktrans_request’: /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mtd/mtd_blkdevs.c:45: error: dereferencing pointer to incomplete type ... make[3]: *** [drivers/mtd/mtd_blkdevs.o] Error 1 <-- snip --> Bug report by Jesper Juhl. This patch also removes a pointless "default n" from the SSFDC option. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [PATCH] BLOCK: Make it possible to disable the block layer [try #6]David Howells2006-09-301-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it possible to disable the block layer. Not all embedded devices require it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require the block layer to be present. This patch does the following: (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev support. (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls an item that uses the block layer. This includes: (*) Block I/O tracing. (*) Disk partition code. (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS. (*) The SCSI layer. As far as I can tell, even SCSI chardevs use the block layer to do scheduling. Some drivers that use SCSI facilities - such as USB storage - end up disabled indirectly from this. (*) Various block-based device drivers, such as IDE and the old CDROM drivers. (*) MTD blockdev handling and FTL. (*) JFFS - which uses set_bdev_super(), something it could avoid doing by taking a leaf out of JFFS2's book. (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and linux/elevator.h contingent on CONFIG_BLOCK being set. sector_div() is, however, still used in places, and so is still available. (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and parts of linux/fs.h. (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK. (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK. (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK is not enabled. (*) fs/no-block.c is created to hold out-of-line stubs and things that are required when CONFIG_BLOCK is not set: (*) Default blockdev file operations (to give error ENODEV on opening). (*) Makes some /proc changes: (*) /proc/devices does not list any blockdevs. (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK. (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK. (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if given command other than Q_SYNC or if a special device is specified. (*) In init/do_mounts.c, no reference is made to the blockdev routines if CONFIG_BLOCK is not defined. This does not prohibit NFS roots or JFFS2. (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return error ENOSYS by way of cond_syscall if so). (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if CONFIG_BLOCK is not set, since they can't then happen. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* [MTD] Fix dependencies with CONFIG_MTD=mDavid Woodhouse2006-09-231-2/+2
| | | | | | | CMDLINEPARTS shouldn't be selectable, and neither should SSFDC, which can be a tristate anyway. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Add SSFDC (SmartMedia) read-only translation layerClaudio Lanconelli2006-09-221-0/+8
| | | | | Signed-off-by: Claudio Lanconelli <lanconelli.claudio@eptar.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds2006-06-261-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (40 commits) kbuild: trivial fixes in Makefile kbuild: adding symbols in Kconfig and defconfig to TAGS kbuild: replace abort() with exit(1) kbuild: support for %.symtypes files kbuild: fix silentoldconfig recursion kbuild: add option for stripping modules while installing them kbuild: kill some false positives from modpost kbuild: export-symbol usage report generator kbuild: fix make -rR breakage kbuild: append -dirty for updated but uncommited changes kbuild: append git revision for all untagged commits kbuild: fix module.symvers parsing in modpost kbuild: ignore make's built-in rules & variables kbuild: bugfix with initramfs kbuild: modpost build fix kbuild: check license compatibility when building modules kbuild: export-type enhancement to modpost.c kbuild: add dependency on kernel.release to the package targets kbuild: `make kernelrelease' speedup kconfig: KCONFIG_OVERWRITECONFIG ...
| * kconfig: remove leading whitespace in menu promptsRoman Zippel2006-06-091-2/+2
| | | | | | | | | | | | | | | | This removes all the leading whitespace kconfig now warns about. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | Trivial typo fixes in Kconfig files (MTD).Egry Gábor2006-05-121-2/+2
|/ | | | | Signed-off-by: Egry Gábor <gaboregry@t-online.hu> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] core: Clean up trailing white spacesThomas Gleixner2005-11-071-16/+16
| | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Add initial support for OneNAND flash chipsKyungmin Park2005-11-061-4/+6
| | | | | | | | OneNAND is a new flash technology from Samsung with integrated SRAM buffers and logic interface. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Add Resident Flash Disk (RFD) supportSean Young2005-11-061-1/+11
| | | | | | | | | | This type of flash translation layer (FTL) is used by the Embedded BIOS by General Software. It is known as the Resident Flash Disk (RFD), see: http://www.gensw.com/pages/prod/bios/rfd.htm Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Linux-2.6.12-rc2Linus Torvalds2005-04-161-0/+265
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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