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path: root/drivers/mtd
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2018-01-09mtd: tests: nandbiterrs: Fix read_page return valueSascha Hauer
The number of corrected bitflips is not correctly reported by the test until the bitflip threshold is reached. read_page() shall return the number of corrected bitflips, but mtd_read() returns 0 or a negative error, so we can't forward its return value. In the absence of an error we always have calculate the number of bitflips ourselves. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-09mtd: nand: brcmnand: Disable prefetch by defaultKamal Dasu
Brcm nand controller prefetch feature needs to be disabled by default. Enabling affects performance on random reads as well as dma reads. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller") Cc: <stable@vger.kernel.org> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-07spi-nor: intel-spi: Remove unused preopcodes fieldMika Westerberg
This field is not used in the driver anymore so remove it. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2018-01-07mtd: fsl-quadspi: account for const type of of_device_id.dataJulia Lawall
This driver creates a number of const structures that it stores in the data field of an of_device_id array. The data field of an of_device_id structure has type const void *, so there is no need for a const-discarding cast when putting const values into such a structure. Done using Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2018-01-07mtd: spi-nor: cadence-quadspi: Add support for direct access modeVignesh R
Cadence QSPI controller provides direct access mode through which flash can be accessed in a memory-mapped IO mode. This enables read/write to flash using memcpy*() functions. This mode provides higher throughput for both read/write operations when compared to current indirect mode of operation. This patch therefore adds support to use QSPI in direct mode. If the window reserved in SoC's memory map for MMIO access is less that of flash size(like on most SoCFPGA variants), then the driver falls back to indirect mode of operation. On TI's 66AK2G SoC, with ARM running at 600MHz and QSPI at 96MHz switching to direct mode improves read throughput from 3MB/s to 8MB/s. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2018-01-07mtd: spi-nor: cadence-quadspi: Refactor indirect read/write sequence.Vignesh R
Move configuring of indirect read/write start address to cqspi_indirect_*_execute() function and rename cqspi_indirect_*_setup() function. This will help to reuse cqspi_indirect_*_setup() function for supporting direct access mode. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2018-01-06mtd: nand: pxa3xx: Fix READOOB implementationBoris Brezillon
In the current driver, OOB bytes are accessed in raw mode, and when a page access is done with NDCR_SPARE_EN set and NDCR_ECC_EN cleared, the driver must read the whole spare area (64 bytes in case of a 2k page, 16 bytes for a 512 page). The driver was only reading the free OOB bytes, which was leaving some unread data in the FIFO and was somehow leading to a timeout. We could patch the driver to read ->spare_size + ->ecc_size instead of just ->spare_size when READOOB is requested, but we'd better make in-band and OOB accesses consistent. Since the driver is always accessing in-band data in non-raw mode (with the ECC engine enabled), we should also access OOB data in this mode. That's particularly useful when using the BCH engine because in this mode the free OOB bytes are also ECC protected. Fixes: 43bcfd2bb24a ("mtd: nand: pxa3xx: Add driver-specific ECC BCH support") Cc: stable@vger.kernel.org Reported-by: Sean Nyekjær <sean.nyekjaer@prevas.dk> Tested-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Tested-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-01-06mtd: nand: qcom: Add a NULL check for devm_kasprintf()Fabio Estevam
devm_kasprintf() may fail, so we should better add a NULL check and propagate an error on failure. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-06mtd: Do not allow MTD devices with inconsistent erase propertiesBoris Brezillon
When mtd->erasesize is 0 or mtd->_erase is NULL, that means the device does not support the erase operation, which in turn means it should have the MTD_NO_ERASE flag set. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Miquel Raynal <miquel.raynal@free-electrons.com>
2018-01-06mtd: sharpslpart: make local function sharpsl_nand_cleanup_ftl() staticWei Yongjun
Fixes the following sparse warnings: drivers/mtd/parsers/sharpslpart.c:222:6: warning: symbol 'sharpsl_nand_cleanup_ftl' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-06mtd: nand: brcmnand: Add a NULL check for devm_kasprintf()Fabio Estevam
devm_kasprintf() may fail, so we should better add a NULL check and propagate an error on failure. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-06mtd: nand: Fix unfinished comment in nand_init_data_interface()Miquel Raynal
Give an unfinished comment a meaning. Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-28mtd: spi-nor: Add ISSI is25lp080d supportRomain Porte
Add support for a new ISSI 1MB SPI NOR chip that was tested in our lab. Datasheet is available at: http://www.issi.com/WW/pdf/25LP-WP080D.pdf Testing was done only without the SPI_NOR_{DUAL,QUAD}_READ flags that were added later, according to the datasheet. Tested-by: Pascal Fabreges <pascal.fabreges@nokia.com> Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Romain Porte <romain.porte@nokia.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-27mtd: spi-nor: Add support for s25fl128l and s25fl256lRafael Gago
They are exactly the same as the s25fl064l but bigger. Signed-off-by: Rafael Gago Castano <rgc@hms.se> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-20mtd: spi-nor: indent issi sectionSean Nyekjaer
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-20mtd: spi-nor: add support for is25lq040bSean Nyekjaer
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-18mtd: onenand: samsung: Remove a useless includeChristophe JAILLET
This include is not needed, so remove it. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-18mtd: onenand: samsung: Propagate the error returned by 'onenand_scan()'Christophe JAILLET
Propagate the error code returned by 'onenand_scan()' instead of a hard-coded -EFAULT. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-18mtd: onenand: samsung: return an error if 'mtd_device_parse_register()' failsChristophe JAILLET
If 'mtd_device_parse_register()' fails, we still return 0 which mean success. Return the error code instead, as done in all the other error handling paths. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-18mtd: onenand: samsung: use devm_ function to simplify code and fix some leaksChristophe JAILLET
Convert all error handling code in 's3c_onenand_probe()' to resource-managed alternatives in order to simplify code. This fixes a resource leak if 'platform_get_resource()' fails at line 872. The 'request_irq()' at line 971 was also un-balanced. It is now resource-managed. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-18mtd: sharpslpart: fix overflow on block_adr calculationColin Ian King
Multiplying block_num and mtd->erasesize may potentially overflow as they are both unsigned ints and so the multiplication is evaluated in unsigned int arithmetic. Cast block_adr to off_t to ensure multiplication is off_t sized to avoid any potential overflow. Detected by CoverityScan, CID#1461264 ("Unintentional integer overflow") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-18mtd: Fix mtd_check_oob_ops()Miquel Raynal
The mtd_check_oob_ops() helper verifies if the operation defined by the user is correct. Fix the check that verifies if the entire requested area exists. This check is too restrictive and will fail anytime the last data byte of the very last page is included in an operation. Fixes: 5cdd929da53d ("mtd: Add sanity checks in mtd_write/read_oob()") Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-12-17mtd: mchp23k256: propagate return value of spi_sync()Antonio Borneo
The call to spi_sync() can fail. Check the return value and propagate it. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-16mtd: mtdswap: make array 'name' static const, shrinks object sizeColin Ian King
Don't populate the read-only array 'name' on the stack but instead make it static and constify it. Makes the object code smaller by 35 bytes: Before: text data bss dec hex filename 26304 4444 352 31100 797c drivers/mtd/mtdswap.o After: text data bss dec hex filename 26205 4508 352 31065 7959 drivers/mtd/mtdswap.o (gcc version 7.2.0 x86_64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-16mtd: nand: add ->exec_op() implementationMiquel Raynal
Introduce a new interface to instruct NAND controllers to send specific NAND operations. The new interface takes the form of a single method called ->exec_op(). This method is designed to replace ->cmd_ctrl(), ->cmdfunc() and ->read/write_byte/word/buf() hooks. ->exec_op() is passed a set of instructions describing the operation to execute. Each instruction has a type (ADDR, CMD, DATA, WAITRDY) and delay. The delay is here to help simple controllers wait enough time between each instruction, advanced controllers with integrated timings control can ignore these delays. Controllers that natively support complex operations (operations formed of several instructions) can use the NAND op parser infrastructure. This infrastructure allows controller drivers to describe the sequence of instructions they support (called nand_op_pattern) and a hook for each of these supported sequences. The core then tries to find the best match for a given NAND operation, and calls the associated hook. Various other helpers are also added to ease NAND controller drivers writing. This new interface should ease support of vendor specific operations in that NAND manufacturer drivers now have a way to check if the controller they are connected to supports a specific operation, and complain or refuse to probe the NAND chip when that's not the case. Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-15mtd: nand: gpio: Fix ALE gpio configurationChristophe Leroy
Fixes a copy/paste error in commit f3d0d8d938b4d ("mtd: nand: gpio: Convert to use GPIO descriptors") which breaks gpio-nand driver Fixes: f3d0d8d938b4d ("mtd: nand: gpio: Convert to use GPIO descriptors") Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Richard Weinberger <richard@nod.at> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-12-15mtd: nand: brcmnand: Zero bitflip is not an errorAlbert Hsieh
A negative return value of brcmstb_nand_verify_erased_page() indicates a real bitflip error of an erased page, and other return values (>= 0) show the corrected bitflip number. Zero return value means no bitflip, but the current driver code treats it as an error, and eventually leads to falsely reported ECC error. Fixes: 02b88eea9f9c ("mtd: brcmnand: Add check for erased page bitflip") Signed-off-by: Albert Hsieh <wen.hsieh@broadcom.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-12-15mtd: nand: gpmi: Fix failure when a erased page has a bitflip at BBMSascha Hauer
When erased subpages are read then the BCH decoder returns STATUS_ERASED if they are all empty, or STATUS_UNCORRECTABLE if there are bitflips. When there are bitflips, we have to set these bits again to show the upper layers a completely erased page. When a bitflip happens in the exact byte where the bad block marker is, then this byte is swapped with another byte in block_mark_swapping(). The correction code then detects a bitflip in another subpage and no longer corrects the bitflip where it really happens. Correct this behaviour by calling block_mark_swapping() after the bitflips have been corrected. In our case UBIFS failed with this bug because it expects erased pages to be really empty: UBIFS error (pid 187): ubifs_scan: corrupt empty space at LEB 36:118735 UBIFS error (pid 187): ubifs_scanned_corruption: corruption at LEB 36:118735 UBIFS error (pid 187): ubifs_scanned_corruption: first 8192 bytes from LEB 36:118735 UBIFS error (pid 187): ubifs_scan: LEB 36 scanning failed UBIFS error (pid 187): do_commit: commit failed, error -117 Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Richard Weinberger <richard@nod.at> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-12-14mtd: nand: samsung: add ECC requirements for K9F4G08U0DMiquel Raynal
Samsung NAND chip K9F4G08U0D minimum ECC strength requirement is 1 bit per 512 bytes. As the chip is not ONFI nor JEDEC and because of the lack of these values, boards using it fail to probe the NAND controller driver. Fix this by setting up the default values. Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: Only allocate ecc->{calc, code}_buf when actually neededBoris Brezillon
The only users of the ecc->{calc,code}_buf buffers are NAND controller drivers implementing ecc->calculate() and/or ecc->correct(). Since the ->oobsize can be non-negligle, especially on modern NAND devices, we'd better allocate it only when it is actually required. Make ecc->{calc,code}_buf allocation dependent on the presence of ecc->calculate() or ecc->correct(). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-12-14mtd: nand: denali: Avoid using ecc->code_buf as a temporary bufferBoris Brezillon
ECC bytes are contiguous in the ->oob_poi buffer, which means we don't have to copy them into ->code_buf (here used as a temporary buffer) before passing them to the nand_check_erased_ecc_chunk() function. This change will allow us to allocate ecc->{code,calc}_buf only when ecc->calculate() or ecc->correct() is specified. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-12-14mtd: nand: mtk: Support MT7622 NAND flash controller.RogerCC Lin
Add tables to support MT7622 NAND flash controller. Signed-off-by: RogerCC Lin <rogercc.lin@mediatek.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: mtk: Support different MTK NAND flash controller IPRogerCC Lin
MT7622 uses an MTK's earlier NAND flash controller IP which support different sector size, max spare size per sector and paraity bits..., some register's offset and definition also been changed in the NAND flash controller, this patch is the preparation to support MT7622 NAND flash controller. MT7622 NFC and ECC engine are similar to MT2701's, except below differences: (1)MT7622 NFC's max sector size(ECC data size) is 512 bytes, and MT2701's is 1024, and MT7622's max sector number is 8. (2)The parity bit of MT7622 is 13, MT2701 is 14. (3)MT7622 ECC supports less ECC strength, max to 16 bit ecc strength. (4)MT7622 supports less spare size per sector, max spare size per sector is 28 bytes. (5)Some register's offset are different, include ECC_ENCIRQ_EN, ECC_ENCIRQ_STA, ECC_DECDONE, ECC_DECIRQ_EN and ECC_DECIRQ_STA. (6)ENC_MODE of ECC_ENCCNFG register is moved from bit 5-6 to bit 4-5. Signed-off-by: RogerCC Lin <rogercc.lin@mediatek.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: onenand: Remove obsolete url from Kconfig helpLadislav Michl
Samsung website no longer host information about OneNAND, delete it. Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: cafe: clean up DMA address setupMasahiro Yamada
Use macros from <linux/kernel.h> to make the code readable. The compiler warning will be kept suppressed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: squash struct nand_buffers into struct nand_chipMasahiro Yamada
struct nand_buffers is malloc'ed in nand_scan_tail() just for containing three pointers. Squash this struct into nand_chip. Move and rename as follows: chip->buffers->ecccalc -> chip->ecc.calc_buf chip->buffers->ecccode -> chip->ecc.code_buf chip->buffers->databuf -> chip->data_buf Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: remove unused NAND_OWN_BUFFERS flagMasahiro Yamada
The last/only user of NAND_OWN_BUFFERS (cafe_nand.c) has been reworked. This flag is no longer needed. Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: cafe: remove use of NAND_OWN_BUFFERSMasahiro Yamada
This driver is the last/only user of NAND_OWN_BUFFERS. Boris suggested to remove this flag. Taking a closer look at this driver, it calls dma_alloc_coherent() for the concatenated area for the DMA bounce buffer + struct nand_buffers, but the latter does not need to be DMA-coherent; cafe_{write,read}_buf simply do memcpy() between buffers when usedma==1. Let's do dma_alloc_coherent() for the DMA bounce buffer in the front, and leave the nand_buffers allocation to nand_scan_tail(), then rip off NAND_OWN_BUFFERS. The magic number, 2112, is still mysterious (hard-coded writesize + oobsize ?), but this is not our main interest. I am keeping it. Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: provide valid ->data_interface during NAND detectionMiquel Raynal
Right now, the chip->data_interface field is populated in nand_scan_tail(), so after the whole NAND detection has taken place. This is fine because these timings are not yet used by the core so early in the probe process, but the situation is about to change with the introduction of ->exec_op(). Also, by convention, nand_scan_ident() is not supposed to allocate resources, only nand_scan_tail() can, so this prevent us from allocating and initializing the data_interface object in nand_scan_ident(). In order to solve this problem, directly embed a data_interface object in nand_chip so that we don't have to allocate it, and initialize it to ONFI SDR mode 0 at the very beginning of nand_scan_ident(). Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-14mtd: nand: force drivers to explicitly send READ/PROG commandsBoris Brezillon
The core currently send the READ0 and SEQIN+PAGEPROG commands in nand_do_read/write_ops(). This is inconsistent with ->read/write_oob[_raw]() hooks behavior which are expected to send these commands. There's already a flag (NAND_ECC_CUSTOM_PAGE_ACCESS) to inform the core that a specific controller wants to send the READ/SEQIN+PAGEPROG commands on its own, but it's an opt-in flag, and existing drivers are unlikely to be updated to pass it. Moreover, some controllers cannot dissociate the READ/PAGEPROG commands from the associated data transfer and ECC engine activation, and developers have to hack things in their ->cmdfunc() implementation to handle such complex cases, or have to accept the perf penalty of sending twice the same command. To address this problem we are planning on adding a new interface which is passed all information about a NAND operation (including the amount of data to transfer) and replacing all calls to ->cmdfunc() to calls to this new ->exec_op() hook. But, in order to do that, we need to have all ->cmdfunc() calls placed near their associated ->read/write_buf/byte() calls. Modify the core and relevant drivers to make NAND_ECC_CUSTOM_PAGE_ACCESS the default case, and remove this flag. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [miquel.raynal@free-electrons.com: tested, fixed and rebased on nand/next] Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-12-14mtd: nand: provide several helpers to do common NAND operationsBoris Brezillon
This is part of the process of removing direct calls to ->cmdfunc() outside of the core in order to introduce a better interface to execute NAND operations. Here we provide several helpers and make use of them to remove all direct calls to ->cmdfunc(). This way, we can easily modify those helpers to make use of the new ->exec_op() interface when available. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [miquel.raynal@free-electrons.com: rebased and fixed some conflicts] Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-12-13mtd: m25p80: restore the status of SPI flash when exitingHou Zhiqiang
Restore the status to be compatible with legacy devices. Take Freescale eSPI boot for example, it copies (in 3 Byte addressing mode) the RCW and bootloader images from SPI flash without firing a reset signal previously, so the reboot command will fail without resetting the addressing mode of SPI flash. This patch implements .shutdown function to restore the status in reboot process, and add the same operation to the .remove function. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-13mtd: spi-nor: add an API to restore the status of SPI flash chipHou Zhiqiang
Add this API to restore the status of SPI flash chip to the default such as addressing mode, whenever detach the driver from device or reboot the system. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-13mtd: spi-nor: Check that BP bits are set properlyAaron Sierra
Previously, the lock and unlock functions returned success even if the BP bits were not actually updated in the status register due to hardware write protection. Introduce write_sr_and_check() to write and read back the status register to ensure the desired BP bits are actually set as requested. Signed-off-by: Joe Schultz <jschultz@xes-inc.com> Signed-off-by: Aaron Sierra <asierra@xes-inc.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-13mtd: spi-nor: check FSR error bits for Micron memoriesBean Huo (beanhuo)
For Micron spi nor device, when erase/program operation fails, especially the failure results from intending to modify protected space, spi-nor upper layers still get the return which shows the operation succeeds. This is because current spi_nor_fsr_ready() only uses FSR bit.7 (flag status register) to check device whether ready. This patch fixes this issue by checking relevant error bits in FSR. The FSR is a powerful tool to investigate the status of device, checking information regarding what the memory is actually doing and detecting possible error conditions. Signed-off-by: beanhuo <beanhuo@micron.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-13mtd: spi-nor: add support for ISSI is25lp128Angelo Dureghello
Add support for ISSI is25lp128 spi nor flash. Signed-off-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
2017-12-01mtd: nand: use usual return values for the ->erase() hookMiquel Raynal
Avoid using specific defined values for checking returned status of the ->erase() hook. Instead, use usual negative error values on failure, zero otherwise. Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-11-30mtd: nand: denali: rename misleading dma_buf to tmp_bufMasahiro Yamada
The "dma_buf" is not used for a DMA bounce buffer, but for arranging the transferred data for the syndrome page layout. In fact, it is used in the PIO mode as well, so "dma_buf" is a misleading name. Rename it to "tmp_buf". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-11-30mtd: nand: remove unnecessary extern from driver headersMasahiro Yamada
'extern' is not necessary for function declarations. scripts/checkpatch.pl with --strict option reports the following: CHECK: extern prototypes should be avoided in .h files Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-11-30mtd: nand: ifc: update bufnum mask for ver >= 2.0.0Jagdish Gediya
Bufnum mask is used to calculate page position in the internal SRAM. As IFC version 2.0.0 has 16KB of internal SRAM as compared to older versions which had 8KB. Hence bufnum mask needs to be updated. Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com> Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>