- 21 5月, 2014 1 次提交
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由 Vincenzo Aliberti 提交于
Signed-off-by: NVincenzo Aliberti <vincenzo.aliberti@gmail.com> Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
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- 28 10月, 2013 2 次提交
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由 Huang Shijie 提交于
The helper is for user applications, and it is just a copy of the kernel helper: mtd_type_is_nand(); Signed-off-by: NHuang Shijie <b32955@freescale.com> Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
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由 Huang Shijie 提交于
In current code, the MTD_NANDFLASH is used to represent both the SLC and MLC. It is confusing to us. By adding an explicit comment about these two macros, this patch makes it clear that: MTD_NANDFLASH : stands for SLC NAND, MTD_MLCNANDFLASH : stands for MLC NAND (including TLC). Signed-off-by: NHuang Shijie <b32955@freescale.com> Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
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- 09 10月, 2012 1 次提交
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由 David Howells 提交于
Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NMichael Kerrisk <mtk.manpages@gmail.com> Acked-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: NDave Jones <davej@redhat.com>
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- 10 1月, 2012 1 次提交
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由 Artem Bityutskiy 提交于
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 11 9月, 2011 7 次提交
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由 Brian Norris 提交于
The ecctype and eccsize fields have been obsolete for a while. Since they don't have any users, we can kill them and leave padding in their place for now. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
We're missing a lot of important documentation in include/mtd/mtd-abi.h: * add a simple description of each ioctl (feel free to expand!) * give full explanations of recently added and modified operations * explain the usage of "RAW" that appear in different modes and types of operations * fix some comment style along the way Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
Implement a new ioctl for writing both page data and OOB to flash at the same time. This ioctl is intended to be a generic interface that can replace other ioctls (MEMWRITEOOB and MEMWRITEOOB64) and cover the functionality of several other old ones, e.g., MEMWRITE can: * write autoplaced OOB instead of using ECCGETLAYOUT (deprecated) and working around the reserved areas * write raw (no ECC) OOB instead of using MTDFILEMODE to set the per-file-descriptor MTD_FILE_MODE_RAW * write raw (no ECC) data instead of using MTDFILEMODE (MTD_FILE_MODE_RAW) and using standard character device "write" This ioctl is especially useful for MLC NAND, which cannot be written twice (i.e., we cannot successfully write the page data and OOB in two separate operations). Instead, MEMWRITE can write both in a single operation. Note that this ioctl is not affected by the MTD file mode (i.e., MTD_FILE_MODE_RAW vs. MTD_FILE_MODE_NORMAL), since it receives its write mode as an input parameter. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
These modes hold their state only for the life of their file descriptor, and they overlap functionality with the MTD_OPS_* modes. Particularly, MTD_MODE_RAW and MTD_OPS_RAW cover the same function: to provide raw (i.e., without ECC) access to the flash. In fact, although it may not be clear, MTD_MODE_RAW implied that operations should enable the MTD_OPS_RAW mode. Thus, we should be specific on what each mode means. This is a start, where MTD_FILE_MODE_* actually represents a "file mode," not necessarily a true global MTD mode. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW affected operations on in-band page data as well. To clarify these options and to emphasize that their effect is applied per-operation, we change the primary prefix to MTD_OPS_. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
We will want to use the MTD_OOB_{PLACE,AUTO,RAW} modes in user-space applications through the introduction of new ioctls, so we should make this enum a shared type. This enum is now anonymous. Artem: tweaked the patch. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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由 Brian Norris 提交于
MEMSETOOBSEL is completely unused and useless. Remove the definition. Note: it's probably best not to use this ioctl number in the future for MTD, since that may cause conflicts between old kernels and new user software (or new kernels and old user software). Artem: leave a comment about MEMSETOOBSEL. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@intel.com>
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- 25 10月, 2010 3 次提交
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MLC NAND Flash has a different cell structure and differs in functioning than the SLC NAND Flash. Hence we are considering it as a different Flash type. Signed-off-by: NRohit H.S <rohit.hs@samsung.com> Signed-off-by: NRaghav Gupta <gupta.raghav@samsung.com> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Brian Norris 提交于
There were some improvements and additions necessary in the comments explaining of the expansion of nand_ecclayout, the introduction of nand_ecclayout_user, and the deprecation of the ioctl ECCGETLAYOUT. Also, I found a better placement for the macro MTD_MAX_ECCPOS_ENTRIES; next to the definition of MTD_MAX_OOBFREE_ENTRIES in mtd-abi.h. The macro is really only important for the ioctl code (found in drivers/mtd/mtdchar.c) but since there are small edits being made to the user-space header, I figured this is a better location. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Brian Norris 提交于
struct nand_ecclayout is too small for many new chips; OOB regions can be as large as 448 bytes and may increase more in the future. Thus, copying that struct to user-space with the ECCGETLAYOUT ioctl is not a good idea; the ioctl would have to be updated every time there's a change to the current largest size. Instead, the old nand_ecclayout is renamed to nand_ecclayout_user and a new struct nand_ecclayout is created that can accomodate larger sizes and expand without affecting the user-space. struct nand_ecclayout can still be used in board drivers without modification -- at least for now. A new function is provided to convert from the new to the old in order to allow the deprecated ioctl to continue to work with truncated data. Perhaps the ioctl, the conversion process, and the struct nand_ecclayout_user can be removed altogether in the future. Note: There are comments in nand/davinci_nand.c::nand_davinci_probe() regarding this issue; this driver (and maybe others) can be updated to account for extra space. All kernel drivers can use the expanded nand_ecclayout as a drop-in replacement and ignore its benefits. Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 09 8月, 2010 1 次提交
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 02 8月, 2010 1 次提交
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由 Richard Cochran 提交于
This patchs adds a way for user space programs to find out whether a flash sector is locked. An optional driver method in the mtd_info struct provides the information. Signed-off-by: NRichard Cochran <richard.cochran@omicron.at> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 29 5月, 2009 2 次提交
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由 Kevin Cernekee 提交于
Signed-off-by: NKevin Cernekee <kpc.mtd@gmail.com> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Kevin Cernekee 提交于
New MEMERASE/MEMREADOOB/MEMWRITEOOB ioctls are needed in order to support 64-bit offsets into large NAND flash devices. Signed-off-by: NKevin Cernekee <kpc.mtd@gmail.com> Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 27 3月, 2009 2 次提交
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由 Arnd Bergmann 提交于
The MTD headers traditionally use stdint types rather than the kernel integer types. This converts them to do the same as all the others. Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Arnd Bergmann 提交于
A number of standard posix types are used in exported headers, which is not allowed if __STRICT_KERNEL_NAMES is defined. In order to get rid of the non-__STRICT_KERNEL_NAMES part and to make sane headers the default, we have to change them all to safe types. There are also still some leftovers in reiserfs_fs.h, elfcore.h and coda.h, but these files have not compiled in user space for a long time. This leaves out the various integer types ({u_,u,}int{8,16,32,64}_t), which we take care of separately. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NMauro Carvalho Chehab <mchehab@redhat.com> Cc: David Airlie <airlied@linux.ie> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Cc: netdev@vger.kernel.org Cc: linux-ppp@vger.kernel.org Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 05 6月, 2008 1 次提交
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由 Adrian Bunk 提交于
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: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 03 2月, 2008 1 次提交
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由 Justin Treon 提交于
Patch for unlocking all Intel flash that has instant locking on power up. The patch has been tested on Intel M18, P30 and J3D Strata Flash. 1. The automatic unlocking can be disabled for a particular partition in the map or the command line. a. For the bit mask in the map it should look like: .mask_flags = MTD_POWERUP_LOCK, b. For the command line parsing it should look like: mtdparts=0x80000(bootloader)lk 2. This will only unlock parts with instant individual block locking. Intel parts with legacy unlocking will not be unlocked. Signed-off-by: NJustin Treon <justin_treon@yahoo.com> Signed-off-by: NJared Hulbert <jaredeh@gmail.com> Acked-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 27 4月, 2007 1 次提交
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由 Artem B. Bityutskiy 提交于
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: NArtem B. Bityutskiy <dedekind@linutronix.de> Signed-off-by: NFrank Haverkamp <haver@vnet.ibm.com>
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- 09 2月, 2007 1 次提交
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由 Artem Bityutskiy 提交于
Remove unused and broken mtd->ecctype and mtd->eccsize fields from struct mtd_info. Do not remove them from userspace API data structures (don't want to breake userspace) but mark them as obsolete by a comment. Any userspace program which uses them should be half-broken anyway, so this is more about saving data structure size. Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 26 9月, 2006 1 次提交
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由 David Woodhouse 提交于
Now that we have headers_install, we don't need this crap. Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 22 9月, 2006 1 次提交
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由 Håvard Skinnemoen 提交于
Introduce the MTD_STUPID_LOCK flag which indicates that the flash chip is always locked after power-up, so all sectors need to be unlocked before it is usable. If this flag is set, and the chip provides an unlock() operation, mtd_add_device will unlock the whole MTD device if it's writeable. This means that non-writeable partitions will stay locked. Set MTD_STUPID_LOCK in fixup_use_atmel_lock() so that these chips will work as expected. Signed-off-by: NHåvard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 29 6月, 2006 1 次提交
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由 Randy Dunlap 提交于
Fix some kernel-doc typos/spellos. Use kernel-doc syntax in places where it was almost used. Correct/add struct, struct field, and function param names where needed. Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 15 6月, 2006 1 次提交
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由 David Woodhouse 提交于
Let's not attempt the abolition of mtd->type until/unless it's properly thought through. And certainly, let's not do it by halves. Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 30 5月, 2006 3 次提交
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由 Joern Engel 提交于
Ram devices get the extra capability of MTD_NO_ERASE - not requiring an explicit erase before writing to it. Currently only mtdblock uses this capability. Rest of the patch is a simple text replacement. Signed-off-by: NJoern Engel <joern@wh.fh-wedel.de>
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由 Joern Engel 提交于
No mtd user should ever check for the device type. Instead, device features should be checked by the flags - if at all. As a first step towards type removal, change MTD_ROM into MTD_GENERIC_TYPE. Signed-off-by: NJoern Engel <joern@wh.fh-wedel.de>
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由 Thomas Gleixner 提交于
The raw read/write access to NAND (without ECC) has been changed in the NAND rework. Expose the new way - setting the file mode via ioctl - to userspace. Also allow to read out the ecc statistics information so userspace tools can see that bitflips happened and whether errors where correctable or not. Also expose the number of bad blocks for the partition, so nandwrite can check if the data fits into the parition before writing to it. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 29 5月, 2006 1 次提交
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由 Thomas Gleixner 提交于
The nand_oobinfo structure is not fitting the newer error correction demands anymore. Replace it by struct nand_ecclayout and fixup the users all over the place. Keep the nand_oobinfo based ioctl for user space compability reasons. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 23 5月, 2006 3 次提交
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由 Joern Engel 提交于
o Add a flag MTD_BIT_WRITEABLE for devices that allow single bits to be cleared. o Replace MTD_PROGRAM_REGIONS with a cleared MTD_BIT_WRITEABLE flag for STMicro and Intel Sibley flashes with internal ECC. Those flashes disallow clearing of single bits, unlike regular NOR flashes, so the new flag models their behaviour better. o Remove MTD_ECC. After the STMicro/Sibley merge, this flag is only set and never checked. Signed-off-by: NJoern Engel <joern@wh.fh-wedel.de>
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由 Joern Engel 提交于
At least two flashes exists that have the concept of a minimum write unit, similar to NAND pages, but no other NAND characteristics. Therefore, rename the minimum write unit to "writesize" for all flashes, including NAND. Signed-off-by: NJoern Engel <joern@wh.fh-wedel.de>
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由 Joern Engel 提交于
Two flags exist to decide whether a device is writeable or not. None of those two flags is checked for independently, so they are clearly redundant, if not an invitation to bugs. This patch removed both of them, replacing them with a single new flag. Signed-off-by: NJoern Engel <joern@wh.fh-wedel.de>
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- 25 4月, 2006 1 次提交
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由 David Woodhouse 提交于
Currently, unifdef removes the comment which starts on the same line as the #ifdef __KERNEL__, but leaves the second line of the comment in place. Move the comment onto a separate line. Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 17 4月, 2006 2 次提交
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由 Jörn Engel 提交于
Three types are never set or checked for. Remove. Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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由 Jörn Engel 提交于
Several flags are set by some devices, but never checked. Remove them. Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 07 11月, 2005 1 次提交
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由 Thomas Gleixner 提交于
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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