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path: root/drivers/mtd/mtdchar.c
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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse2008-02-03
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| * mtd: Convert from class_device to device for MTD/mtdcharTony Jones2008-01-24
| | | | | | | | | | | | | | | | | | | | | | struct class_device is going away, this converts the code to use struct device instead. Signed-off-by: Tony Jones <tonyj@suse.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | [MTD] mtdchar.c: ioctl always returns 0 as size written for ppc64David Scidmore2008-01-08
|/ | | | | | | | | | | | "include/linux/mtd/mtd.h" declares "mtd_oob_ops.retlen" as size_t, which is 64 bits on targets with a 64 bit addressing. The MEMWRITEOOB ioctl calls copy_to_user() to write it back to "mtd_oob_buf.length", which is declared in "include/linux/mtd-abi.h" as uint32_t. Since powerpc is a big endian architecture, this only copies the upper 32 bits of the address, which is always 0. Signed-off-by: David Scidmore <dscidmore@xes-inc.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Merge branch 'master' of ↵David Woodhouse2007-08-23
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * mtdchar build fixAndrew Morton2007-08-11
| | | | | | | | | | | | | | | | | | | | | | | | | | sh: drivers/mtd/mtdchar.c: In function `mtd_mmap': drivers/mtd/mtdchar.c:817: error: dereferencing pointer to incomplete type drivers/mtd/mtdchar.c:817: error: `VM_SHARED' undeclared (first use in this function) drivers/mtd/mtdchar.c:817: error: (Each undeclared identifier is reported only once Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [MTD] Only call mtd->sync() method in mtdchar close if opened for write.Joakim Tjernlund2007-06-28
|/ | | | | Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Fix length comparison in MEMREADOOBThomas Gleixner2007-04-17
| | | | | | | | The ops.len member is not initialized, because it is unused for this operation. The length check needs to use ops.ooblen instead Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Merge git://git.infradead.org/mtd-2.6Linus Torvalds2007-02-19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/mtd-2.6: (49 commits) [MTD] [NAND] S3C2412 fix hw ecc [MTD] [NAND] Work around false compiler warning in CAFÉ driver [JFFS2] printk warning fixes [MTD] [MAPS] ichxrom warning fix [MTD] [MAPS] amd76xrom warning fix [MTD] [MAPS] esb2rom warning fixes [MTD] [MAPS] ck804xrom warning fix [MTD] [MAPS] netsc520 warning fix [MTD] [MAPS] sc520cdp warning fix [MTD] [ONENAND] onenand_base warning fix [MTD] [NAND] eXcite nand flash driver [MTD] Improve heuristic for detecting wrong-endian RedBoot partition table [MTD] Fix RedBoot partition parsing regression harder. [MTD] [NAND] S3C2410: Hardware ECC correction code [JFFS2] Use MTD_OOB_AUTO to automatically place cleanmarker on NAND [MTD] Clarify OOB-operation interface comments [MTD] remove unused ecctype,eccsize fields from struct mtd_info [MTD] [NOR] Intel: remove ugly PROGREGION macros [MTD] [NOR] STAA: use writesize instead off eccsize to represent ECC block [MTD] OneNAND: Invalidate bufferRAM after erase ...
| * [MTD] remove unused ecctype,eccsize fields from struct mtd_infoArtem Bityutskiy2007-02-09
| | | | | | | | | | | | | | | | | | | | | | | | 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: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [PATCH] mark struct file_operations const 5Arjan van de Ven2007-02-12
|/ | | | | | | | | | | Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [MTD] return error code from get_mtd_device()Artem Bityutskiy2006-11-29
| | | | | | | get_mtd_device() returns NULL in case of any failure. Teach it to return an error code instead. Fix all users as well. Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
* [MTD] replace kmalloc+memset with kzallocBurman Yan2006-11-28
| | | | | Signed-off-by: Yan Burman <yan_952@hotmail.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] [NAND] remove len/ooblen confusion.Vitaly Wool2006-11-28
| | | | | | | | | | | | | | | | | | | | As was discussed between Ricard Wanderlöf, David Woodhouse, Artem Bityutskiy and me, the current API for reading/writing OOB is confusing. The thing that introduces confusion is the need to specify ops.len together with ops.ooblen for reads/writes that concern only OOB not data area. So, ops.len is overloaded: when ops.datbuf != NULL it serves to specify the length of the data read, and when ops.datbuf == NULL, it serves to specify the full OOB read length. The patch inlined below is the slightly updated version of the previous patch serving the same purpose, but with the new Artem's comments taken into account. Artem, BTW, thanks a lot for your valuable input! Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdchar: Fix MEMGETOOBSEL and ECCGETLAYOUT ioctlsRicard Wanderlöf2006-10-21
| | | | | | | | | | | | 1. The ECCGETLAYOUT ioctl copy_to_user() call has a superfluous '&' causing the resulting information to be garbage rather than the intended mtd->ecclayout. 2. The MEMGETOOBSEL misses copying mtd->ecclayout->eccbytes so the resulting field of the returned structure contains garbage. Signed-off-by: Ricard Wanderlöf <ricardw@axis.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Use SEEK_{SET,CUR,END} instead of hardcoded values in mtdchar lseek()Josef 'Jeff' Sipek2006-09-17
| | | | | Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [MTD] CORE mtdchar.c: fix off-by-one error in lseek()Herbert Valerio Riedel2006-06-27
| | | | | | | | | | | | | | | Allow lseek(mtdchar_fd, 0, SEEK_END) to succeed, which currently fails with EINVAL. lseek(fd, 0, SEEK_END) should result into the same fileposition as lseek(fd, 0, SEEK_SET) + read(fd, buf, length(fd)) Furthermore, lseek(fd, 0, SEEK_CUR) should return the current file position, which in case of an encountered EOF should not result in EINVAL Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] NAND: Fix breakage all over the placeThomas Gleixner2006-06-20
| | | | | | | | | | | | | | | | | | Following problems are addressed: - wrong status caused early break out of nand_wait() - removed the bogus status check in nand_wait() which is a relict of the abandoned support for interrupted erase. - status check moved to the correct place in read_oob - oob support for syndrom based ecc with strange layouts - use given offset in the AUTOOOB based oob operations Partially based on a patch from Vitaly Vool <vwool@ru.mvista.com> Thanks to Savin Zlobec <savin@epico.si> for tracking down the status problem. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Disconnect struct mtd_info from ABIJoern Engel2006-05-30
| | | | | | | | | mtdchar.c direcly copied part of struct mtd_info to userspace, thereby implicitly making it part of the ABI. With this patch, struct mtd_info is independent of the ABI and can have its fields removed, reordered, etc. Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
* [MTD] NAND Expose the new raw mode function and status info to userspaceThomas Gleixner2006-05-29
| | | | | | | | | | | 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: Thomas Gleixner <tglx@linutronix.de>
* [MTD] NAND Signal that a bitflip was corrected by ECCThomas Gleixner2006-05-29
| | | | | | | | Return -EUCLEAN on read when a bitflip was detected and corrected, so the clients can react and eventually copy the affected block to a spare one. Make all in kernel users aware of the change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Rework the out of band handling completelyThomas Gleixner2006-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hopefully the last iteration on this! The handling of out of band data on NAND was accompanied by tons of fruitless discussions and halfarsed patches to make it work for a particular problem. Sufficiently annoyed by I all those "I know it better" mails and the resonable amount of discarded "it solves my problem" patches, I finally decided to go for the big rework. After removing the _ecc variants of mtd read/write functions the solution to satisfy the various requirements was to refactor the read/write _oob functions in mtd. The major change is that read/write_oob now takes a pointer to an operation descriptor structure "struct mtd_oob_ops".instead of having a function with at least seven arguments. read/write_oob which should probably renamed to a more descriptive name, can do the following tasks: - read/write out of band data - read/write data content and out of band data - read/write raw data content and out of band data (ecc disabled) struct mtd_oob_ops has a mode field, which determines the oob handling mode. Aside of the MTD_OOB_RAW mode, which is intended to be especially for diagnostic purposes and some internal functions e.g. bad block table creation, the other two modes are for mtd clients: MTD_OOB_PLACE puts/gets the given oob data exactly to/from the place which is described by the ooboffs and ooblen fields of the mtd_oob_ops strcuture. It's up to the caller to make sure that the byte positions are not used by the ECC placement algorithms. MTD_OOB_AUTO puts/gets the given oob data automaticaly to/from the places in the out of band area which are described by the oobfree tuples in the ecclayout data structre which is associated to the devicee. The decision whether data plus oob or oob only handling is done depends on the setting of the datbuf member of the data structure. When datbuf == NULL then the internal read/write_oob functions are selected, otherwise the read/write data routines are invoked. Tested on a few platforms with all variants. Please be aware of possible regressions for your particular device / application scenario Disclaimer: Any whining will be ignored from those who just contributed "hot air blurb" and never sat down to tackle the underlying problem of the mess in the NAND driver grown over time and the big chunk of work to fix up the existing users. The problem was not the holiness of the existing MTD interfaces. The problems was the lack of time to go for the big overhaul. It's easy to add more mess to the existing one, but it takes alot of effort to go for a real solution. Improvements and bugfixes are welcome! Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Remove silly MTD_WRITE/READ macrosThomas Gleixner2006-05-29
| | | | | | | Most of those macros are unused and the used ones just obfuscate the code. Remove them and fixup all users. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] NAND Replace oobinfo by ecclayoutThomas Gleixner2006-05-29
| | | | | | | | | 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: Thomas Gleixner <tglx@linutronix.de>
* [MTD] NAND Consolidate oobinfo handlingThomas Gleixner2006-05-29
| | | | | | | | | The info structure for out of band data was copied into the mtd structure. Make it a pointer and remove the ability to set it from userspace. The position of ecc bytes is defined by the hardware and should not be changed by software. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* OneNAND: One-Time Programmable (OTP) supportKyungmin Park2006-05-12
| | | | | | | | | | | | | | One Block of the NAND Flash Array memory is reserved as a One-Time Programmable Block memory area. Also, 1st Block of NAND Flash Array can be used as OTP. The OTP block can be read, programmed and locked using the same operations as any other NAND Flash Array memory block. OTP block cannot be erased. OTP block is fully-guaranteed to be a valid block. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
* [PATCH] Remove unnecessary kmalloc/kfree calls in mtdcharThago Galesi2006-04-17
| | | | | | | | This patch removes repeated calls to kmalloc / kfree in mtd_write / mtd_read functions, replacing them by a single kmalloc / kfree pair. Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] core: Clean up trailing white spacesThomas Gleixner2005-11-07
| | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Tidy up Tims include cleanupThomas Gleixner2005-11-06
| | | | | | | While we are at it, reorder the includes and remove the silly /* TASK */ comment Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge branch 'master' of /home/tglx/work/mtd/git/linux-2.6.git/Thomas Gleixner2005-11-06
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| * [PATCH] fix missing includesTim Schmielau2005-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] Driver Core: fix up all callers of class_device_create()Greg Kroah-Hartman2005-10-28
| | | | | | | | | | | | | | | | The previous patch adding the ability to nest struct class_device changed the paramaters to the call class_device_create(). This patch fixes up all in-kernel users of the function. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | [MTD] mtdchar: Return EINVAL for bad seeks instead of fixing up to valid byteTodd Poynor2005-08-04
|/ | | | | | | | | mtdchar return -EINVAL for seek prior to offset 0 or to beyond the last byte in the device/partition, similar to various other seek methods, instead of fixing up to first or last byte. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] mtdchar: Return the real error code when create_class() failedCoywolf Qi Hunt2005-07-04
| | | | | Signed-off-by: Coywolf Qi Hunt <coywolf@sosdg.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] mtdchar.c: Replace DEVFS by udevTodd Poynor2005-07-01
| | | | | | | | | | | | Switch from DEVFS to udev for dynamic creation of device nodes for mtd char devices. Creates a new LDM class "mtd" with writeable and read-only devices registered for each mtdchar device. From: Paolo Galtieri <pgaltieri@mvista.com> Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Reset file position when switching OTP modeNicolas Pitre2005-05-23
| | | | | Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Unabuse file-f_mode for OTP purposeNicolas Pitre2005-05-23
| | | | | Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] User interface to Protection RegistersNicolas Pitre2005-05-23
| | | | | | | | | | | This is implemented using a ioctl to switch the MTD char device into one of the different OTP "modes", at which point read/write/seek can operate on the selected OTP area. Also some extra ioctls to query for size and lock protection segments or groups. Some example user space utilities are provided. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
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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