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2017-11-29mtd: nand: Drop the ->errstat() hookBoris Brezillon
The ->errstat() hook is no longer implemented NAND controller drivers. Get rid of it before someone starts abusing it. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 7d135bcced20be2b50128432c5426a7278ec4f6d] [masahiro: modify davinci_nand.c for U-Boot] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Drop unused cached programming supportBoris Brezillon
Cached programming is always skipped, so drop the associated code until we decide to really support it. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 0b4773fd1649e0d418275557723a7ef54f769dc9] [masahiro: modify davinci_nand.c for U-Boot] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: add mtd_ooblayout_xxx() helper functionsBoris Brezillon
In order to make the ecclayout definition completely dynamic we need to rework the way the OOB layout are defined and iterated. Create a few mtd_ooblayout_xxx() helpers to ease OOB bytes manipulation and hide ecclayout internals to their users. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 75eb2cec251fda33c9bb716ecc372819abb9278a] [masahiro: cherry-pick more code from adbbc3bc827eb1f43a932d783f09ba55c8ec8379] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Support controllers with custom pageMarc Gonzalez
If your controller already sends the required NAND commands when reading or writing a page, then the framework is not supposed to send READ0 and SEQIN/PAGEPROG respectively. Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 3371d663bb4579f1b2003a92162edd6d90edd089] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Add a few more timings to nand_sdr_timingsBoris Brezillon
Add the tR_max, tBERS_max, tPROG_max and tCCS_min timings to the nand_sdr_timings struct. Assign default/safe values for the statically defined timings, and extract them from the ONFI parameter table if the NAND is ONFI compliant. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Tested-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> [Linux commit: 204e7ecd47e26cc12d9e8e8a7e7a2eeb9573f0ba Fixup commit: 6d29231000bbe0fb9e4893a9c68151ffdd3b5469] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Fix data interface configuration logicBoris Brezillon
When changing from one data interface setting to another, one has to ensure a specific sequence which is described in the ONFI spec. One of these constraints is that the CE line has go high after a reset before a command can be sent with the new data interface setting, which is not guaranteed by the current implementation. Rework the nand_reset() function and all the call sites to make sure the CE line is asserted and released when required. Also make sure to actually apply the new data interface setting on the first die. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Fixes: d8e725dd8311 ("mtd: nand: automate NAND timings selection") Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Tested-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> [Linux commit: 73f907fd5fa56b0066d199bdd7126bbd04f6cd7b] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: automate NAND timings selectionBoris Brezillon
The NAND framework provides several helpers to query timing modes supported by a NAND chip, but this implies that all NAND controller drivers have to implement the same timings selection dance. Also currently NAND devices can be resetted at arbitrary places which also resets the timing for ONFI chips to timing mode 0. Provide a common logic to select the best timings based on ONFI or ->onfi_timing_mode_default information. Hook this into nand_reset() to make sure the new timing is applied each time during a reset. NAND controller willing to support timings adjustment should just implement the ->setup_data_interface() method. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> [Linux commit: d8e725dd831186a3595036b2b1df9f68cbc6efa3] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Expose data interface for ONFI mode 0Sascha Hauer
The nand layer will need ONFI mode 0 to use it as timing mode before and right after reset. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 6e1f9708dbf3c50a8da93c1952a01a7a2acb5e66] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: convert ONFI mode into data interfaceSascha Hauer
struct nand_data_interface is the designated type to pass to the NAND drivers to configure the timing. To simplify further patches convert the onfi_sdr_timings array from type struct nand_sdr_timings nand_data_interface. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: b1dd3ca203fccd111926c3f6ac59bf903ec62b05] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Introduce nand_data_interfaceSascha Hauer
Currently we have no data structure to fully describe a NAND timing. We only have struct nand_sdr_timings for NAND timings in SDR mode, but nothing for DDR mode and also no container to store both types of timing. This patch adds struct nand_data_interface which stores the timing type and a union of different timings. This can be used to pass to drivers in order to configure the timing. Add kerneldoc for struct nand_sdr_timings while touching it anyway. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: eee64b700e26b9bcc6fce024681c31f5e12271fc] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Create a NAND reset functionSascha Hauer
When NAND devices are resetted some initialization may have to be done, like for example they have to be configured for the timing mode that shall be used. To get a common place where this initialization can be implemented create a nand_reset() function. This currently only issues a NAND_CMD_RESET to the NAND device. The places issuing this command manually are replaced with a call to nand_reset(). Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 2f94abfe35b210e7711af9202a3dcfc9e779219a] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: remove unnecessary 'extern' from function declarationsSascha Hauer
'extern' is not necessary for function declarations. To prevent people from adding the keyword to new declarations remove the existing ones. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [Linux commit: 79022591839f110f465cac0223e117b91d47d5db] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: Add an option to maximize the ECC strengthBoris Brezillon
The generic NAND DT bindings allows one to tweak the ECC strength and step size to their need. It can be used to lower the ECC strength to match a bootloader/firmware config, but might also be used to get a better reliability. In the latter case, the user might want to use the maximum ECC strength without having to explicitly calculate the exact value (this value not only depends on the OOB size, but also on the NAND controller, and can be tricky to extract). Add a generic 'nand-ecc-maximize' DT property and the associated NAND_ECC_MAXIMIZE flag, to let ECC controller drivers select the best ECC strength and step-size on their own. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Rob Herring <robh@kernel.org> [Linux commit: ba78ee00e1ff84de9b3ad33edbd3ec599099ee82] [masahiro: of_property_read_bool -> fdt_getprop for U-Boot] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-11-29mtd: nand: add onfi_* stubs in case ONFI_DETECTION is disabledMasahiro Yamada
Add stubs to the header in case CONFIG_SYS_NAND_ONFI_DETECTION is disabled. This is much easier than adding around #ifdef to the caller side. Also, I removed the #ifdef around onfi_params. In Linux, onfi_params and jedec_params are unified as union. It will be the right thing to do. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-10-23mtd: remove MTDDEBUG() and CONFIG_MTD_DEBUGMasahiro Yamada
All users of this macro have been converted. Remove MTDDEBUG and related CONFIG options. ubifs_dbg_msg_key() is kept. It is silent unless DEBUG is defined. I am not touching scripts/config_whitelist.txt. The deprecated options will be dropped by the next resync. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-10-04printk: collect printk stuff into <linux/printk.h> with loglevel supportMasahiro Yamada
When we import code from Linux, with regular re-sync planned, we want to use printk() and pr_*(). U-Boot does not support them in a clean way. So, people end up with local macros, or compat headers here and there, then we occasionally see build errors of definition conflicts. We have include/linux/compat.h, but putting all sorts of unrelated things into a single header is just a temporal workaround. Hence this patch, to find the best home for all printk variants. If you want to use printk() and friends, please include <linux/printk.h>. This header is self-contained, and pulls in only a few headers. When I was testing this clean-up, I noticed the image size exceeded its platform limit on some boards. This is because all pr_*() that were previously defined as no-op in include/linux/mtd/mtd.h (unless CONFIG_MTD_DEBUG is set), are now enabled. To make such boards happy, this commit also implements CONFIG_LOGLEVEL. The concept is similar to the kernel parameter "loglevel". (Actually, the Kconfig help message was taken from kernel-paremeter.txt of Linux) Messages with a loglevel smaller than console loglevel will be printed. The difference is the loglevel is build-time determined. To save the image size, lower priority pr_*() are compiled out. I set the default of CONFIG_LOGLEVEL to 6, i.e. pr_notice and higher priority messages are compiled in. I adjusted CONFIG_LOGLEVEL to avoid build error for some boards. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [trini: Add in SPL_LOGLEVEL that is the same as LOGLEVEL] Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-23treewide: replace #include <asm/errno.h> with <linux/errno.h>Masahiro Yamada
Now, arch/${ARCH}/include/asm/errno.h and include/linux/errno.h have the same content. (both just wrap <asm-generic/errno.h>) Replace all include directives for <asm/errno.h> with <linux/errno.h>. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [trini: Fixup include/clk.] Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-23treewide: use #include <...> to include public headersMasahiro Yamada
We are supposed to use #include <...> to include headers in the public include paths. We should use #include "..." only for headers in local directories. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-24mtd: fix compiler warningsSteve Rae
- add missing declaration - update debug output format specifiers Signed-off-by: Steve Rae <steve.rae@raedomain.com>
2016-07-24mtd: nand: Increase the max OOB sizeBoris Brezillon
Some NANDs are now exposing 1664 OOB bytes per page. Adjust the NAND_MAX_OOBSIZE value accordingly. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-07-24mtd: nand: add common DT init codeBrian Norris
These are already-documented common bindings for NAND chips. Let's handle them in nand_base. If NAND controller drivers need to act on this data before bringing up the NAND chip (e.g., fill out ECC callback functions, change HW modes, etc.), then they can do so between calling nand_scan_ident() and nand_scan_tail(). The original commit has been slightly reworked to use the fdtdec_xxx() helpers (instead of the of_xxxx() ones). Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
2016-07-22armv7: armv7: introduce set_gpmc_cs0Ladislav Michl
Allow boards to runtime detect flash type. Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
2016-07-22armv7: make gpmc_cfg constLadislav Michl
Signed-off-by: Ladislav Michl <ladis@linux-mips.org> [trini: Adapt am33xx, duovero, omap_zoom1] Signed-off-by: Tom Rini <trini@konsulko.com> Signed-off-by: Tom Rini <trini@konsulko.com>
2016-06-03mtd: nand: Sync with Linux v4.6Scott Wood
Updates the NAND code to match Linux v4.6. The previous sync was from Linux v4.1 in commit d3963721d93fafa. Note that none of the individual NAND drivers tracked Linux closely enough to be synced themselves, other than manually applying a few cross-tree changes. Signed-off-by: Scott Wood <oss@buserror.net> Tested-by: Heiko Schocher <hs@denx.de>
2016-06-03mtd: nand: Add page argument to write_page() etc.Scott Wood
This change is part of the Linux 4.6 sync. It is being done before the main sync patch in order to make it easier to address the issue across all NAND drivers (many/most of which do not closely track their Linux counterparts) separately from other merge issues. Signed-off-by: Scott Wood <oss@buserror.net>
2016-06-03mtd: nand: Add+use mtd_to/from_nand and nand_get/set_controller_dataScott Wood
These functions are part of the Linux 4.6 sync. They are being added before the main sync patch in order to make it easier to address the issue across all NAND drivers (many/most of which do not closely track their Linux counterparts) separately from other merge issues. Signed-off-by: Scott Wood <oss@buserror.net>
2016-06-03nand: Embed mtd_info in struct nand_chipScott Wood
nand_info[] is now an array of pointers, with the actual mtd_info instance embedded in struct nand_chip. This is in preparation for syncing the NAND code with Linux 4.6, which makes the same change to struct nand_chip. It's in a separate commit due to the large amount of changes required to accommodate the change to nand_info[]. Signed-off-by: Scott Wood <oss@buserror.net>
2016-06-03mtd: nand: Remove docg4 driver and palmtreo680 flashing toolScott Wood
Commit ad4f54ea86b ("arm: Remove palmtreo680 board") removed the only user of the docg4 driver and the palmtreo680 image flashing tool. This patch removes them. Signed-off-by: Scott Wood <oss@buserror.net> Cc: Mike Dunn <mikedunn@newsguy.com> Cc: Simon Glass <sjg@chromium.org>
2016-05-02Change my mailaddressAndreas Bießmann
I'll switch my mails to my own server, so drop all gmail references. Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2015-11-12include/linux/mtd: Update copyright noticesTom Rini
Condense these updates down to SPDX tags too while doing this. This is a port of a1452a3771c4eb85bd779790b040efdc36f4274e from the Linux Kernel. Signed-off-by: Tom Rini <trini@konsulko.com>
2015-11-12dm: implement a MTD uclassThomas Chou
Implement a Memory Technology Device (MTD) uclass. It should include most flash drivers in the future. Though no uclass ops are defined yet, the MTD ops could be used. The NAND flash driver is based on MTD. The CFI flash and SPI flash support MTD, too. It should make sense to convert them to MTD uclass. Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
2015-10-26ubi,ubifs: sync with linux v4.2Heiko Schocher
sync with linux v4.2 commit 64291f7db5bd8150a74ad2036f1037e6a0428df2 Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Sun Aug 30 11:34:09 2015 -0700 Linux 4.2 This update is needed, as it turned out, that fastmap was in experimental/broken state in kernel v3.15, which was the last base for U-Boot. Signed-off-by: Heiko Schocher <hs@denx.de> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
2015-08-25mtd: nand: Increase max sizes of OOB and Page sizeSiva Durga Prasad Paladugu
Increase max sizes for OOB, Page size and eccpos to suit for Micron MT29F32G08 part Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
2015-08-25nand: Sync with Linux v4.1Scott Wood
Update the NAND code to match Linux v4.1. The previous sync was from Linux v3.15 in commit 4e67c57125290b25. CONFIG_SYS_NAND_RESET_CNT is removed, as the upstream Linux code now has its own timeout. Plus, CONFIG_SYS_NAND_RESET_CNT was undocumented and not selected by any board. Signed-off-by: Scott Wood <scottwood@freescale.com>
2015-08-25mtd: Introduce mtd_block_isreserved()Ezequiel Garcia
In addition to mtd_block_isbad(), which checks if a block is bad or reserved, it's needed to check if a block is reserved only (but not bad). This commit adds an MTD interface for it, in a similar fashion to mtd_block_isbad(). While here, fix mtd_block_isbad() so the out-of-bounds checking is done before the callback check. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Tested-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> [scottwood: Cherry-picked from Linux 8471bb73ba10ed67] Signed-off-by: Scott Wood <scottwood@freescale.com>
2015-08-25nand: Remove __UBOOT__ ifdefsScott Wood
I didn't approve the patch that added them. Get them out of the way before doing a sync. Signed-off-by: Scott Wood <scottwood@freescale.com>
2015-07-10mtd: fix false positive "Offset exceeds device limit" errorMasahiro Yamada
Since commit 09c3280754f8 (mtd, nand: Move common functions from cmd_nand.c to common place), NAND commands would not work at all on large devices. => nand read 80000000 10000 10000 NAND read: Offset exceeds device limit => nand erase 100000 100000 NAND erase: Offset exceeds device limit The type of the "size" of "struct mtd_info" is uint64_t, while mtd_arg_off_size() and mtd_arg_off() treat chipsize as int type. The chipsize is wrapped around if the argument is given with 2GB or larger. Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-06-30mtd, nand: Move common functions from cmd_nand.c to common placeHeiko Schocher
Move common functions from cmd_nand.c (for calculating offset and size from cmdline paramter) to common place, so they could used from other commands which use mtd partitions. For onenand the arg_off_size() is left in common/cmd_onenand.c. It should use now the common arg_off() function, but as I could not test onenand I let it there ... Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Scott Wood <scottwood@freescale.com> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
2015-03-30nand: Remove CONFIG_MTD_NAND_VERIFY_WRITEPeter Tyser
The CONFIG_MTD_NAND_VERIFY_WRITE has been removed from Linux for some time and a more generic method of NAND verification now exists in U-Boot. Signed-off-by: Peter Tyser <ptyser@xes-inc.com> Tested-by: Heiko Schocher <hs@denx.de> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13mtd: OMAP: Enable GPMC prefetch modeDaniel Mack
Enable GPMC's prefetch feature for NAND access. This speeds up NAND read access a lot by pre-fetching contents in the background and reading them through the FIFO address. The current implementation has two limitations: a) it only works in 8-bit mode b) it only supports read access Both is easily fixable by someone who has hardware to implement it. Note that U-Boot code uses non word-aligned buffers to read data into, and request read lengths that are not multiples of 4, so both partial buffers (head and tail) have to be addressed. Tested on AM335x hardware. Tested-by: Guido Martínez <guido@vanguardiasur.com.ar> Reviewed-by: Guido Martínez <guido@vanguardiasur.com.ar> Signed-off-by: Daniel Mack <zonque@gmail.com> [trini: Make apply again, use 'cs' fix pointed out by Guido] Signed-off-by: Tom Rini <trini@ti.com>
2014-09-16kbuild: force to define __UBOOT__ in all the C sourcesMasahiro Yamada
U-Boot has imported various source files from other projects, mostly Linux. Something like #ifdef __UBOOT__ [ modification for U-Boot ] #else [ original code ] #endif is an often used strategy for clarification of adjusted parts, that is, easier re-sync in future. Instead of defining __UBOOT__ in each source file, passing it from the top Makefile would be easier. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Heiko Schocher <hs@denx.de>
2014-08-25mtd,ubi,ubifs: sync with linux v3.15Heiko Schocher
snyc with linux v3.15: commit 1860e379875dfe7271c649058aeddffe5afd9d0d Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Sun Jun 8 11:19:54 2014 -0700 Linux 3.15 Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Scott Wood <scottwood@freescale.com> Cc: Tom Rini <trini@ti.com>
2014-08-25mtd, ubi, ubifs: update for the sync with linux v3.14Heiko Schocher
while playing with the new mtd/ubi/ubifs sync, found some small updates for it: - add del_mtd_partition() to include/linux/mtd/mtd - mtd: add a debug_printf - remove some not used functions Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Scott Wood <scottwood@freescale.com> Cc: Tom Rini <trini@ti.com>
2014-08-25mtd, ubi, ubifs: resync with Linux-3.14Heiko Schocher
resync ubi subsystem with linux: commit 455c6fdbd219161bd09b1165f11699d6d73de11c Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Sun Mar 30 20:40:15 2014 -0700 Linux 3.14 A nice side effect of this, is we introduce UBI Fastmap support to U-Boot. Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Rini <trini@ti.com> Cc: Marek Vasut <marex@denx.de> Cc: Sergey Lapin <slapin@ossfans.org> Cc: Scott Wood <scottwood@freescale.com> Cc: Joerg Krause <jkrause@posteo.de>
2014-06-06mtd: nand: omap: add support for BCH16_ECC - NAND driver updatespekon gupta
This patch add support for BCH16_ECC to omap_gpmc driver. *need to BCH16 ECC scheme* With newer SLC Flash technologies and MLC NAND, and large densities, pagesizes Flash devices have become more suspectible to bit-flips. Thus stronger ECC schemes are required for protecting the data. But stronger ECC schemes have come with larger-sized ECC syndromes which require more space in OOB/Spare. This puts constrains like; (a) BCH16_ECC can correct 16 bit-flips per 512Bytes of data. (b) BCH16_ECC generates 26-bytes of ECC syndrome / 512B. Due to (b) this scheme can only be used with NAND devices which have enough OOB to satisfy following equation: OOBsize per page >= 26 * (page-size / 512) Signed-off-by: Pekon Gupta <pekon@ti.com>
2014-06-06mtd: nand: omap_gpmc: use macro for register definitionspekon gupta
GPMC can support simultaneous processing of 8 512Byte data chunks, in parallel Signed-off-by: Pekon Gupta <pekon@ti.com>
2014-06-06mtd: nand: fix GET/SET_FEATURES address on 16-bit devicesDavid Mosberger
As per following Sections in ONFI Spec, GET_FEATURES and SET_FEATURES also need byte-addressing on 16-bit devices. *Section: Target Initialization" "The Read ID and Read Parameter Page commands only use the lower 8-bits of the data bus. The host shall not issue commands that use a word data width on x16 devices until the host determines the device supports a 16-bit data bus width in the parameter page." *Section: Bus Width Requirements* "When the host supports a 16-bit bus width, only data is transferred at the 16-bit width. All address and command line transfers shall use only the lower 8-bits of the data bus. During command transfers, the host may place any value on the upper 8-bits of the data bus. During address transfers, the host shall set the upper 8-bits of the data bus to 00h." So porting following commit from linux kernel commit e34fcb07a6d57411de6e15a47724fbe92c5caa42 Author: David Mosberger <davidm@egauge.net> (preserving authorship) mtd: nand: fix GET/SET_FEATURES address on 16-bit devices Signed-off-by: Pekon Gupta <pekon@ti.com>
2014-06-06mtd: nand: force NAND_CMD_READID onto 8-bit busBrian Norris
As per following Sections in ONFI Spec, NAND_CMD_READID should use only lower 8-bit for transfering command, address and data even on x16 NAND device. *Section: Target Initialization" "The Read ID and Read Parameter Page commands only use the lower 8-bits of the data bus. The host shall not issue commands that use a word data width on x16 devices until the host determines the device supports a 16-bit data bus width in the parameter page." *Section: Bus Width Requirements* "When the host supports a 16-bit bus width, only data is transferred at the 16-bit width. All address and command line transfers shall use only the lower 8-bits of the data bus. During command transfers, the host may place any value on the upper 8-bits of the data bus. During address transfers, the host shall set the upper 8-bits of the data bus to 00h." Thus porting following commit from linux-kernel to ensure that column address is not altered to align to x16 bus when issuing NAND_CMD_READID command. commit 3dad2344e92c6e1aeae42df1c4824f307c51bcc7 mtd: nand: force NAND_CMD_READID onto 8-bit bus Author: Brian Norris <computersforpeace@gmail.com> (preserving authorship) The NAND command helpers tend to automatically shift the column address for x16 bus devices, since most commands expect a word address, not a byte address. The Read ID command, however, expects an 8-bit address (i.e., 0x00, 0x20, or 0x40 should not be translated to 0x00, 0x10, or 0x20). This fixes the column address for a few drivers which imitate the nand_base defaults. Signed-off-by: Pekon Gupta <pekon@ti.com>
2014-06-06mtd: nand: omap_elm: use macros for register definitionspekon gupta
This patch adds macros for following parameters of ELM Hardware engine - ELM_MAX_CHANNELS: ELM can process 8 data streams simultaneously - ELM_MAX_ERRORS: ELM can detect upto 16 ECC error when using BCH16 scheme Signed-off-by: Pekon Gupta <pekon@ti.com> Reviewed-by: Stefan Roese <sr@denx.de>
2014-06-06mtd: nand: omap_elm: use bch_type instead of nibble count to differentiate ↵pekon gupta
between BCH4/BCH8/BCH16 ELM hardware engine support ECC error detection for multiple ECC strengths like +------+------------------------+ |Type | ECC syndrome length | +------+------------------------+ |BCH4 | 6.5 bytes = 13 nibbles | |BCH8 | 13 byte = 26 nibbles | |BCH16 | 26 bytes = 52 nibbles | +------+------------------------+ Current implementation of omap_elm driver uses ECC syndrom length (in 'nibbles') to differentiate between BCH4/BCH8/BCH16. This patch replaces it with 'bch_type' Signed-off-by: Pekon Gupta <pekon@ti.com> Reviewed-by: Stefan Roese <sr@denx.de>
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