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* mtd: mtdparts: introduce mtd_get_device_sizeRichard Genoud2012-09-04
| | | | | | | | | | | 'mtd_get_device_size()' returns the size of the whole MTD device, that is the mtd_info master size. This will be used by UBI to calculate the maximum number of bad blocks (MBB) on a MTD device. Artem: amended the patch a bit. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* mtd: mark mtd_is_partition argument as constantRichard Genoud2012-09-04
| | | | | | | | 'struct mtd_info' is not modified by 'mtd_is_partition()' so it can be marked as "const". Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* Merge tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtdLinus Torvalds2012-06-01
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull mtd update from David Woodhouse: - More robust parsing especially of xattr data in JFFS2 - Updates to mxc_nand and gpmi drivers to support new boards and device tree - Improve consistency of information about ECC strength in NAND devices - Clean up partition handling of plat_nand - Support NAND drivers without dedicated access to OOB area - BCH hardware ECC support for OMAP - Other fixes and cleanups, and a few new device IDs Fixed trivial conflict in drivers/mtd/nand/gpmi-nand/gpmi-nand.c due to added include files next to each other. * tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtd: (75 commits) mtd: mxc_nand: move ecc strengh setup before nand_scan_tail mtd: block2mtd: fix recursive call of mtd_writev mtd: gpmi-nand: define ecc.strength mtd: of_parts: fix breakage in Kconfig mtd: nand: fix scan_read_raw_oob mtd: docg3 fix in-middle of blocks reads mtd: cfi_cmdset_0002: Slight cleanup of fixup messages mtd: add fixup for S29NS512P NOR flash. jffs2: allow to complete xattr integrity check on first GC scan jffs2: allow to discriminate between recoverable and non-recoverable errors mtd: nand: omap: add support for hardware BCH ecc ARM: OMAP3: gpmc: add BCH ecc api and modes mtd: nand: check the return code of 'read_oob/read_oob_raw' mtd: nand: remove 'sndcmd' parameter of 'read_oob/read_oob_raw' mtd: m25p80: Add support for Winbond W25Q80BW jffs2: get rid of jffs2_sync_super jffs2: remove unnecessary GC pass on sync jffs2: remove unnecessary GC pass on umount jffs2: remove lock_super mtd: gpmi: add gpmi support for mx6q ...
| * mtd: nand: remove 'sndcmd' parameter of 'read_oob/read_oob_raw'Shmulik Ladkani2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | As of [mtd: nand: remove autoincrement 'sndcmd' code], the NAND_CMD_READ0 command is issued unconditionally. Thus, read_oob/read_oob_raw's 'sndcmd' argument is no longer needed, as well as their return code. Remove the 'sndcmd' parameter, and set the return code to 0. Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: gpmi: add device tree support to gpmi-nandHuang Shijie2012-05-14
| | | | | | | | | | | | | | | | | | This patch just adds the DT support to gpmi-nand. Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Huang Shijie <shijie8@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand: add 'oob_required' argument to NAND {read,write}_page interfacesBrian Norris2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | New NAND controllers can perform read/write via HW engines which don't expose OOB data in their DMA mode. To reflect this, we should rework the nand_chip / nand_ecc_ctrl interfaces that assume that drivers will always read/write OOB data in the nand_chip.oob_poi buffer. A better interface includes a boolean argument that explicitly tells the callee when OOB data is requested by the calling layer (for reading/writing to/from nand_chip.oob_poi). This patch adds the 'oob_required' parameter to each relevant {read,write}_page interface; all 'oob_required' parameters are left unused for now. The next patch will set the parameter properly in the nand_base.c callers, and follow-up patches will make use of 'oob_required' in some of the callee functions. Note that currently, there is no harm in ignoring the 'oob_required' parameter and *always* utilizing nand_chip.oob_poi, but there can be performance/complexity/design benefits from avoiding filling oob_poi in the common case. I will try to implement this for some drivers which can be ported easily. Note: I couldn't compile-test all of these easily, as some had ARCH dependencies. [dwmw2: Merge later 1/0 vs. true/false cleanup] Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Acked-by: Jiandong Zheng <jdzheng@broadcom.com> Acked-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: add read_byte support to plat_nandJohn Crispin2012-05-14
| | | | | | | | | | | | | | | | | | | | | | Lantiq SoCs have a External Bus Unit (EBU) that is used to attach MTD media. As we need to co-exist with PCI on the same bus, certain swapping settings must be applied. Similar to the NOR map driver we need to apply a fix to make NAND work. The easiest way is to use byte reads. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand: kill NAND_NO_AUTOINCR optionBrian Norris2012-05-14
| | | | | | | | | | | | | | | | No drivers use auto-increment NAND, so kill the NO_AUTOINCR option entirely. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEANMike Dunn2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The drivers' _read() method, absent an error, returns a non-negative integer indicating the maximum number of bit errors that were corrected in any one region comprising an ecc step. MTD returns -EUCLEAN if this is >= bitflip_threshold, 0 otherwise. If bitflip_threshold is zero, the comparison is not made since these devices lack ECC and always return zero in the non-error case (thanks Brian)¹. Note that this is a subtle change to the driver interface. This and the preceding patches in this set were tested with ubi on top of the nandsim and docg4 devices, running the ubi test io_basic from mtd-utils. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040468.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Brian Norris <computersforpeace@gmail.com> Ivan Djelic <ivan.djelic@parrot.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: bitflip_threshold added to mtd_info and sysfsMike Dunn2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An element 'bitflip_threshold' is added to struct mtd_info, and also exposed as a read/write variable in sysfs. This will be used to determine whether or not mtd_read() returns -EUCLEAN or 0 (absent a hard error). If the driver leaves it as zero, mtd will set it to a default value of ecc_strength. This v2 adds the line that propagates bitflip_threshold from the master to the partitions - thanks Ivan¹. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040900.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: ecc_strength is at ecc step granularityMike Dunn2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | ecc_strength element of mtd_info will be the strength of one ecc step, not of the entire writesize, as was previously planned. This is the appropriate way because, as was pointed out¹, bit errors in excess of the strength of one step can cause a hard error if they all occur within the same ecc region. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040313.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | UBI: modify ubi_wl_flush function to clear work queue for a lnumJoel Reardon2012-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch modifies ubi_wl_flush to force the erasure of particular volume id / logical eraseblock number pairs. Previous functionality is preserved when passing UBI_ALL for both values. The locations where ubi_wl_flush were called are appropriately changed: ubi_leb_erase only flushes for the erased LEB, and ubi_create_volume forces only flushing for its volume id. External code can call this new feature via the new function ubi_flush() added to kapi.c, which simply passes through to ubi_wl_flush(). This was tested by disabling the call to do_work in ubi thread, which results in the work queue remaining unless explicitly called to remove. UBIFS was changed to call ubifs_leb_change 50 times for four different LEBs. Then the new function was called to clear the queue: passing wrong volume ids / lnum, correct ones, and finally UBI_ALL for both to ensure it was finally all cleard. The work queue was dumped each time and the selective removal of the particular LEB numbers was observed. Extra checks were enabled and ubifs's integck was also run. Finally, the drive was repeatedly filled and emptied to ensure that the queue was cleared normally. Artem: amended the patch. Signed-off-by: Joel Reardon <reardonj@inf.ethz.ch> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* | UBI: introduce UBI_ALL constantArtem Bityutskiy2012-05-21
| | | | | | | | | | | | | | | | Joel will use it in his 'ubi_flush()' extention to specify all eraseblocks. Also amend the comment for UBI_UNKNOWN - it is used beyond attaching info structure now. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* | UBI: Kill data type hintRichard Weinberger2012-05-20
|/ | | | | | | | | | | We do not need this feature and to our shame it even was not working and there was a bug found very recently. -- Artem Bityutskiy Without the data type hint UBI2 (fastmap) will be easier to implement. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6Linus Torvalds2012-03-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MTD changes from David Woodhouse: - Artem's cleanup of the MTD API continues apace. - Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst others. - More work on DiskOnChip G3, new driver for DiskOnChip G4. - Clean up debug/warning printks in JFFS2 to use pr_<level>. Fix up various trivial conflicts, largely due to changes in calling conventions for things like dmaengine_prep_slave_sg() (new inline wrapper to hide new parameter, clashing with rewrite of previously last parameter that used to be an 'append' flag, and is now a bitmap of 'unsigned long flags'). (Also some header file fallout - like so many merges this merge window - and silly conflicts with sparse fixes) * tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits) mtd: docg3 add protection against concurrency mtd: docg3 refactor cascade floors structure mtd: docg3 increase write/erase timeout mtd: docg3 fix inbound calculations mtd: nand: gpmi: fix function annotations mtd: phram: fix section mismatch for phram_setup mtd: unify initialization of erase_info->fail_addr mtd: support ONFI multi lun NAND mtd: sm_ftl: fix typo in major number. mtd: add device-tree support to spear_smi mtd: spear_smi: Remove default partition information from driver mtd: Add device-tree support to fsmc_nand mtd: fix section mismatch for doc_probe_device mtd: nand/fsmc: Remove sparse warnings and errors mtd: nand/fsmc: Add DMA support mtd: nand/fsmc: Access the NAND device word by word whenever possible mtd: nand/fsmc: Use dev_err to report error scenario mtd: nand/fsmc: Use devm routines mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform mtd: fsmc_nand: add pm callbacks to support hibernation ...
| * mtd: add device-tree support to spear_smiStefan Roese2012-03-26
| | | | | | | | | | | | | | | | | | This patch adds support to configure the SPEAr SMI driver via device-tree instead of platform_data. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: Add device-tree support to fsmc_nandStefan Roese2012-03-26
| | | | | | | | | | | | | | | | | | This patch adds support to configure the FSMC NAND driver (used amongst others on SPEAr platforms) via device-tree instead of platform_data. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand/fsmc: Remove sparse warnings and errorsVipin Kumar2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the sparse below warnings and errors for nand/fsmc driver /root/vipin/spear/kernel/3.3/linux-3.3/drivers/mtd/nand/fsmc_nand.c:363:31: warning: incorrect type in initializer (different address spaces) /root/vipin/spear/kernel/3.3/linux-3.3/drivers/mtd/nand/fsmc_nand.c:363:31: expected struct fsmc_regs *regs /root/vipin/spear/kernel/3.3/linux-3.3/drivers/mtd/nand/fsmc_nand.c:363:31: got void [noderef] <asn:2>*regs_va [...] Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand/fsmc: Add DMA supportVipin Kumar2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The fsmc_nand driver uses cpu to read/write onto the device. This is inefficient because of two reasons - the cpu gets locked on AHB bus while reading from NAND - the cpu is unnecessarily used when dma can do the job This patch adds the support for accessing the device through DMA Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Reviewed-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand/fsmc: Access the NAND device word by word whenever possibleVipin Kumar2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The default way of accessing nand device is using the nand width. This means that 8bit devices are using u8 * and 16bit devices are accessed using u16 *. This results in a non-optimal performance since the FSMC is designed to translate the normal word accesses into device width based accesses. This patch implements read_buf and write_buf callbacks using word by word accesses. Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Reviewed-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platformVipin Kumar2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | FSMC controllers provide registers to program the required timing values for attached NAND device. The timing values used until now are relaxed and should work for all devices. Although, for read/write performance improvements, the fsmc nand driver should accept nand timings as a platform data and program the timing parameters into fsmc registers accordingly. This patch implements this modification. Additionally, it programs the default timing parameters if these are not passed via platform data. Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: add ecc_strength fields to mtd structsMike Dunn2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | This adds 'ecc_strength' to struct mtd_info. This stores the maximum number of bit errors that can be corrected in one writesize region. For consistency with the nand code, 'strength' is similiarly added to struct nand_ecc_ctrl. This stores the maximum number of bit errors that can be corrected in one ecc step. Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: sh_flctl: Add power management with QoS requestBastian Hecht2012-03-26
| | | | | | | | | | | | | | | | | | | | | | Adds power management code with fine granularity. Every flash control command is enclosed by runtime_put()/get()s. To make sure that no overhead is generated by too frequent power state switches, a quality of service request is issued. Signed-off-by: Bastian Hecht <hechtb@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: fsmc: Move ALE, CLE defines to their respective platformShiraz Hashim2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | Address Latch Enable (ALE) and Command Latch Enable (CLE) defines are platform specific and were wrongly put in driver specific fsmc.h file. Move such defines to their respective platform. Also instead of relying on fsmc driver, pass ALE, CLE offsets explicitly from individual platform. Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: fsmc: use ALE and CLE offsets from platform dataShiraz Hashim2012-03-26
| | | | | | | | | | | | | | | | | | ALE and CLE offsets can be different on different devices. Let devices pass these offsets to the fsmc driver through platform data. Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: sh_flctl: Add FLHOLDCR registerBastian Hecht2012-03-26
| | | | | | | | | | | | | | | | | | Add a register used in new FLCTL hardware and a feature flag for it. Signed-off-by: Bastian Hecht <hechtb@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: sh_flctl: Use cached register value for FLCMNCRBastian Hecht2012-03-26
| | | | | | | | | | | | | | | | | | | | Instead of reading out the register, use a cached value. This will make way for a proper runtime power management implementation. Signed-off-by: Bastian Hecht <hechtb@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: sh_flctl: Expand FLCMNCR register bit fieldBastian Hecht2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | Add support for a new hardware generation. The meaning of some bits of the FLCMNCR register changed, so some new defines are added parallel to the existing ones to keep backward compatibility. The defines allow to choose an appropriate clocking scheme. Signed-off-by: Bastian Hecht <hechtb@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: check for zero length in OTP functionsArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes all the OTP functions like 'mtd_get_fact_prot_info()' and makes them return zero immediately if the input 'len' parameter is 0. This is not really needed currently, but most of the other functions do this, and it is just consistent to do the same in the OTP functions. This patch also moves the OTP functions from the header file to mtdcore.c because they become a bit too big for being inlined. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: remove junk pmc551.hArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | This header is tiny and contains only pmc551-private stuff, so it should not live in 'include/linux' - let's just merge it with pmc551.c. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: remove R/O checking duplicationArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | | | | | | | Many drivers check whether the partition is R/O and return -EROFS if yes. Let's stop having duplicated checks and move them to the API functions instead. And again a bit of noise - deleted few too sparse newlines, sorry. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: add offset and length checks to the API functionArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add verification of the offset and length to MTD API functions and verify that MTD device offset and length are within MTD device size. The modified API functions are: 'mtd_erase()' 'mtd_point()' 'mtd_unpoint()' 'mtd_get_unmapped_area()' 'mtd_read()' 'mtd_write()' 'mtd_panic_write()' 'mtd_lock()' 'mtd_unlock()' 'mtd_is_locked()' 'mtd_block_isbad()' 'mtd_block_markbad()' This patch also uninlines these functions and exports in mtdcore.c because they are not performance-critical and do not have to be inlined. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: return error code from mtd_unpointArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | The 'mtd_unpoint()' API function should be able to return an error code because it may fail if you specify incorrect offset. This patch changes this MTD API function and amends all the drivers correspondingly. Also return '-EOPNOTSUPP' from 'mtd_unpoint()' when the '->unpoint()' method is undefined. We do not really need this currently, but this just makes sense to be consistent with 'mtd_point()'. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand: write BBM to OOB even with flash-based BBTBrian Norris2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the flash-based BBT implementation writes bad block data only to its flash-based table and not to the OOB marker area. Then, as new bad blocks are marked over time, the OOB markers become incomplete and the flash-based table becomes the only source of current bad block information. This becomes an obvious problem when, for example: * bootloader cannot read the flash-based BBT format * BBT is corrupted and the flash must be rescanned for bad blocks; we want to remember bad blocks that were marked from Linux So to keep the bad block markers in sync with the flash-based BBT, this patch changes the default so that we write bad block markers to the proper OOB area on each block in addition to flash-based BBT. Comments are updated, expanded, and/or relocated as necessary. The new flash-based BBT procedure for marking bad blocks: (1) erase the affected block, to allow OOB marker to be written cleanly (2) update in-memory BBT (3) write bad block marker to OOB area of affected block (4) update flash-based BBT Note that we retain the first error encountered in (3) or (4), finish the procedures, and dump the error in the end. This should handle power cuts gracefully enough. (1) and (2) are mostly harmless (note that (1) will not erase an already-recognized bad block). The OOB and BBT may be "out of sync" if we experience power loss bewteen (3) and (4), but we can reasonably expect that on next boot, subsequent I/O operations will discover that the block should be marked bad again, thus re-syncing the OOB and BBT. Note that this is a change from the previous default flash-based BBT behavior. If your system cannot support writing bad block markers to OOB, use the new NAND_BBT_NO_OOB_BBM option (in combination with NAND_BBT_USE_FLASH and NAND_BBT_NO_OOB). Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: add leading underscore to all mtd functionsArtem Bityutskiy2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch renames all MTD functions by adding a "_" prefix: mtd->erase -> mtd->_erase mtd->read_oob -> mtd->_read_oob ... The reason is that we are re-working the MTD API and from now on it is an error to use MTD function pointers directly - we have a corresponding API call for every pointer. By adding a leading "_" we achieve the following: 1. Make sure we convert every direct pointer users 2. A leading "_" suggests that this interface is internal and it becomes less likely that people will use them directly 3. Make sure all the out-of-tree modules stop compiling and the owners spot the big API change and amend them. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: ST SPEAr: Add SMI driver for serial NOR flashShiraz Hashim2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SPEAr platforms (spear3xx/spear6xx/spear13xx) provide SMI (Serial Memory Interface) controller to access serial NOR flash. SMI provides a simple interface for SPI/serial NOR flashes and has certain inbuilt commands and features to support these flashes easily. It also makes it possible to map an address range in order to directly access (read/write) the SNOR over address bus. This patch intends to provide serial nor driver support for spear platforms which are accessed through SMI. Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: nand: correct comment on nand_chip badblockbitsBrian Norris2012-03-26
| | | | | | | | | | | | | | | | | | The description for badblockbits is incorrect. I think someone just made up a false description on the spot to satisfy some kerneldoc warning. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * mtd: mtdblock: call mtd_sync() only if opened for writeAlexander Stein2012-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Because it is useless to call it if the device is opened in R/O mode, and also harmful: on CFI NOR flash it may block for long time waiting for erase operations to complete is another partition with a R/W file-system on this chip. Artem Bityutskiy: write commit message, amend the patch to match the latest tree (we use mtd_sync(), not mtd->sync() nowadays). Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | Merge tag 'split-asm_system_h-for-linus-20120328' of ↵Linus Torvalds2012-03-28
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system Pull "Disintegrate and delete asm/system.h" from David Howells: "Here are a bunch of patches to disintegrate asm/system.h into a set of separate bits to relieve the problem of circular inclusion dependencies. I've built all the working defconfigs from all the arches that I can and made sure that they don't break. The reason for these patches is that I recently encountered a circular dependency problem that came about when I produced some patches to optimise get_order() by rewriting it to use ilog2(). This uses bitops - and on the SH arch asm/bitops.h drags in asm-generic/get_order.h by a circuituous route involving asm/system.h. The main difficulty seems to be asm/system.h. It holds a number of low level bits with no/few dependencies that are commonly used (eg. memory barriers) and a number of bits with more dependencies that aren't used in many places (eg. switch_to()). These patches break asm/system.h up into the following core pieces: (1) asm/barrier.h Move memory barriers here. This already done for MIPS and Alpha. (2) asm/switch_to.h Move switch_to() and related stuff here. (3) asm/exec.h Move arch_align_stack() here. Other process execution related bits could perhaps go here from asm/processor.h. (4) asm/cmpxchg.h Move xchg() and cmpxchg() here as they're full word atomic ops and frequently used by atomic_xchg() and atomic_cmpxchg(). (5) asm/bug.h Move die() and related bits. (6) asm/auxvec.h Move AT_VECTOR_SIZE_ARCH here. Other arch headers are created as needed on a per-arch basis." Fixed up some conflicts from other header file cleanups and moving code around that has happened in the meantime, so David's testing is somewhat weakened by that. We'll find out anything that got broken and fix it.. * tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits) Delete all instances of asm/system.h Remove all #inclusions of asm/system.h Add #includes needed to permit the removal of asm/system.h Move all declarations of free_initmem() to linux/mm.h Disintegrate asm/system.h for OpenRISC Split arch_align_stack() out from asm-generic/system.h Split the switch_to() wrapper out of asm-generic/system.h Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h Create asm-generic/barrier.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] Disintegrate asm/system.h for Tile Disintegrate asm/system.h for Sparc Disintegrate asm/system.h for SH Disintegrate asm/system.h for Score Disintegrate asm/system.h for S390 Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PA-RISC Disintegrate asm/system.h for MN10300 ...
| * | Remove all #inclusions of asm/system.hDavid Howells2012-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <dhowells@redhat.com>
| * | Add #includes needed to permit the removal of asm/system.hDavid Howells2012-03-28
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | asm/system.h is a cause of circular dependency problems because it contains commonly used primitive stuff like barrier definitions and uncommonly used stuff like switch_to() that might require MMU definitions. asm/system.h has been disintegrated by this point on all arches into the following common segments: (1) asm/barrier.h Moved memory barrier definitions here. (2) asm/cmpxchg.h Moved xchg() and cmpxchg() here. #included in asm/atomic.h. (3) asm/bug.h Moved die() and similar here. (4) asm/exec.h Moved arch_align_stack() here. (5) asm/elf.h Moved AT_VECTOR_SIZE_ARCH here. (6) asm/switch_to.h Moved switch_to() here. Signed-off-by: David Howells <dhowells@redhat.com>
* / BUG: headers with BUG/BUG_ON etc. need linux/bug.hPaul Gortmaker2012-03-04
|/ | | | | | | | | | | | | If a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any other BUG variant in a static inline (i.e. not in a #define) then that header really should be including <linux/bug.h> and not just expecting it to be implicitly present. We can make this change risk-free, since if the files using these headers didn't have exposure to linux/bug.h already, they would have been causing compile failures/warnings. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* Merge tag 'for-linus-3.3' of git://git.infradead.org/~dwmw2/mtd-3.3Linus Torvalds2012-02-04
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | - Fix a regression in 16-bit Atmel NAND flash which was introduced in 3.1 - Fix breakage with MTD suspend caused by the API rework - Fix a problem with resetting the MX28 BCH module - A couple of other trivial fixes * tag 'for-linus-3.3-20120204' of git://git.infradead.org/~dwmw2/mtd-3.3: Revert "mtd: atmel_nand: optimize read/write buffer functions" mtd: fix MTD suspend jffs2: do not initialize variable unnecessarily mtd: gpmi-nand bugfix: reset the BCH module when it is not MX23 mtd: nand: fix typo in comment
| * mtd: fix MTD suspendArtem Bityutskiy2012-01-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commits 3fe4bae88460869a8e553397cd9057a4ee7ca341 and 079c985e7a6f4ce60f931cebfdd5ee3c3 broke MTD suspend in 2 ways: 1. When the '->suspend' method is not present, we return -EOPNOTSUPP, but the callers of 'mtd_suspend()' expects 0 instead. 2. Checking of the 'mtd' parameter against NULL has been incorrectly removed in 'mtd_cls_suspend()'. This patch fixes the breakages. This has been found, analyzed, reported and tested by Rafael J. Wysocki <rjw@sisk.pl>. Note, this patch is not needed in the stable tree because it causes a regression introduced during the v3.3 merge window. Reported-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | mtd: fix merge conflict resolution breakageArtem Bityutskiy2012-02-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes merge conflict resolution breakage introduced by merge d3712b9dfcf4 ("Merge tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream"). The commit changed 'mtd_can_have_bb()' function and made it always return zero, which is incorrect. Instead, we need it to return whether the underlying flash device can have bad eraseblocks or not. UBI needs this information because it affects how it handles the underlying flash. E.g., if the underlying flash is NOR, it cannot have bad blocks and any write or erase error is fatal, and all we can do is to switch to R/O mode. We do not need to reserve a pool of good eraseblocks for bad eraseblocks handling, and so on. This patch also removes 'mtd_can_have_bb()' invocations from Logfs to ensure correct Logfs behavior. I've tested that with this patch UBI works on top of NOR and NAND flashes emulated by mtdram and nandsim correspondingly. This patch is based on patch from Linus Torvalds. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Jörn Engel <joern@logfs.org> Acked-by: Prasad Joshi <prasadjoshi.linux@gmail.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstreamLinus Torvalds2012-01-31
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are few important bug fixes for LogFS * tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream: Logfs: Allow NULL block_isbad() methods logfs: Grow inode in delete path logfs: Free areas before calling generic_shutdown_super() logfs: remove useless BUG_ON MAINTAINERS: Add Prasad Joshi in LogFS maintiners logfs: Propagate page parameter to __logfs_write_inode logfs: set superblock shutdown flag after generic sb shutdown logfs: take write mutex lock during fsync and sync logfs: Prevent memory corruption logfs: update page reference count for pined pages Fix up conflict in fs/logfs/dev_mtd.c due to semantic change in what "mtd->block_isbad" means in commit f2933e86ad93: "Logfs: Allow NULL block_isbad() methods" clashing with the abstraction changes in the commits 7086c19d0742: "mtd: introduce mtd_block_isbad interface" and d58b27ed58a3: "logfs: do not use 'mtd->block_isbad' directly". This resolution takes the semantics from commit f2933e86ad93, and just makes mtd_block_isbad() return zero (false) if the 'block_isbad' function is NULL. But that also means that now "mtd_can_have_bb()" always returns 0. Now, "mtd_block_markbad()" will obviously return an error if the low-level driver doesn't support bad blocks, so this is somewhat non-symmetric, but it actually makes sense if a NULL "block_isbad" function is considered to mean "I assume that all my blocks are always good".
* \ \ Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2012-01-17
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits) ARM: mach-shmobile: specify CHCLR registers on SH7372 dma: shdma: fix runtime PM: clear channel buffers on reset dma/imx-sdma: save irq flags when use spin_lock in sdma_tx_submit dmaengine/ste_dma40: clear LNK on channel startup dmaengine: intel_mid_dma: remove legacy pm interface ASoC: mxs: correct 'direction' of device_prep_dma_cyclic dmaengine: intel_mid_dma: error path fix dmaengine: intel_mid_dma: locking and freeing fixes mtd: gpmi-nand: move to dma_transfer_direction mtd: fix compile error for gpmi-nand mmc: mxs-mmc: fix the dma_transfer_direction migration dmaengine: add DMA_TRANS_NONE to dma_transfer_direction dma: mxs-dma: Don't use CLKGATE bits in CTRL0 to disable DMA channels dma: mxs-dma: make mxs_dma_prep_slave_sg() multi user safe dma: mxs-dma: Always leave mxs_dma_init() with the clock disabled. dma: mxs-dma: fix a typo in comment DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/remove video i.MX IPU: Fix display connections i.MX IPU DMA: Fix wrong burstsize settings dmaengine/ste_dma40: allow fixed physical channel ... Fix up conflicts in drivers/dma/{Kconfig,mxs-dma.c,pl330.c} The conflicts looked pretty trivial, but I'll ask people to verify them.
| * | mtd: fix compile error for gpmi-nandHuang Shijie2011-12-23
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver gpmi-nand should compile at least. This patch adds the missing gpmi-nand.h to fix the compile error below. CC drivers/mtd/nand/gpmi-nand/gpmi-nand.o CC drivers/mtd/nand/gpmi-nand/gpmi-lib.o drivers/mtd/nand/gpmi-nand/gpmi-nand.c:25:33: fatal error: linux/mtd/gpmi-nand.h: No such file or directory drivers/mtd/nand/gpmi-nand/gpmi-lib.c:21:33: fatal error: linux/mtd/gpmi-nand.h: No such file or directory This header is grabbed from patch below, which has not been postponed for merging. [PATCH v8 1/4] ARM: mxs: add GPMI-NAND support for imx23/imx28 http://permalink.gmane.org/gmane.linux.drivers.mtd/37338 Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* | mtd: do not use mtd->block_markbad directlyArtem Bityutskiy2012-01-09
| | | | | | | | | | | | | | | | Instead, use the new 'mtd_can_have_bb()', or just rely on 'mtd_block_markbad()' return code, which will be -EOPNOTSUPP if bad blocks are not supported. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | mtd: introduce mtd_can_have_bb helperArtem Bityutskiy2012-01-09
| | | | | | | | | | | | | | | | | | This patch introduces new 'mtd_can_have_bb()' helper function which checks whether the flash can have bad eraseblocks. Then it changes all the direct 'mtd->block_isbad' use cases with 'mtd_can_have_bb()'. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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