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path: root/drivers/spi/spi-bcm-qspi.c
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2019-11-07spi: bcm-qspi: Convert to use CS GPIO descriptorsChris Packham
Set use_gpio_descriptors to true and avoid asserting the native chip select if the spi core has done it for us. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20191107044235.4864-2-chris.packham@alliedtelesis.co.nz Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-30spi: bcm-qspi: Make BSPI default modeRayagonda Kokatanur
The spi-nor controller defaults to BSPI mode, hence switch back to its default mode after MSPI operations (write or erase) are completed. Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Reviewed-by: Mark Brown <broonie@kernel.org> Reviewed-by: Kamal Dasu <kdasu.kdev@gmail.com> Link: https://lore.kernel.org/r/1567139325-7912-1-git-send-email-rayagonda.kokatanur@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23Merge branch 'spi-5.3' into spi-5.4Mark Brown
2019-08-07spi: bcm-qspi: Fix BSPI QUAD and DUAL mode support when using flex modeRayagonda Kokatanur
Fix data transfer width settings based on DT field 'spi-rx-bus-width' to configure BSPI in single, dual or quad mode by using data width and not the command width. Fixes: 5f195ee7d830c ("spi: bcm-qspi: Implement the spi_mem interface") Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Link: https://lore.kernel.org/r/1565086070-28451-1-git-send-email-rayagonda.kokatanur@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation the gpl this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license version 2 gplv2 for more details you should have received a copy of the gnu general public license version 2 gplv2 along with this source code extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 16 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081201.771169395@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-11spi: bcm-qspi: switch back to reading flash using smaller chunksRafał Miłecki
Fixing/optimizing bcm_qspi_bspi_read() performance introduced two changes: 1) It added a loop to read all requested data using multiple BSPI ops. 2) It bumped max size of a single BSPI block request from 256 to 512 B. The later change resulted in occasional BSPI timeouts causing a regression. For some unknown reason hardware doesn't always handle reads as expected when using 512 B chunks. In such cases it may happen that BSPI returns amount of requested bytes without the last 1-3 ones. It provides the remaining bytes later but doesn't raise an interrupt until another LR start. Switching back to 256 B reads fixes that problem and regression. Fixes: 345309fa7c0c ("spi: bcm-qspi: Fix bcm_qspi_bspi_read() performance") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2018-10-11spi: bcm-qspi: fix calculation of address lengthRafał Miłecki
During implementation of the new API bcm_qspi_bspi_set_flex_mode() has been modified breaking calculation of address length. An unnecessary multiplication was added breaking flash reads. Fixes: 5f195ee7d830 ("spi: bcm-qspi: Implement the spi_mem interface") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2018-06-04Merge branch 'spi-4.17' into spi-4.18 for the merge windowMark Brown
2018-05-13spi: bcm-qspi: Fix build failure caused by spi_flash_read() API removalBoris Brezillon
Patch http://patchwork.ozlabs.org/patch/905205/ has been partially applied, and changes to the bcm-qspi driver have been lost somehow (probably due to a conflict when applying the patch). Remove the ->spi_flash_read() bits from this driver to fix the build error. Fixes: c1f5ba70decf ("spi: Get rid of the spi_flash_read() API") Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-11spi: bcm-qspi: Implement the spi_mem interfaceBoris Brezillon
The spi_mem interface is meant to replace the ->spi_flash_read() one. Implement the ->exec_op() method to ease removal of the old interface. Not that ->spi_flash_read() is now implemented as a wrapper around the new bcm_qspi_exec_mem_op() function so that we can easily get rid of it when ->spi_flash_read() is removed. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Kamal Dasu <kdasu.kdev@gmail.com> Tested-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-02spi: bcm-qspi: Always read and set BSPI_MAST_N_BOOT_CTRLKamal Dasu
Always confirm the BSPI_MAST_N_BOOT_CTRL bit when enabling or disabling BSPI transfers. Fixes: 4e3b2d236fe00 ("spi: bcm-qspi: Add BSPI spi-nor flash controller driver") Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2018-05-02spi: bcm-qspi: Avoid setting MSPI_CDRAM_PCS for spi-nor masterKamal Dasu
Added fix for probing of spi-nor device non-zero chip selects. Set MSPI_CDRAM_PCS (peripheral chip select) with spi master for MSPI controller and not for MSPI/BSPI spi-nor master controller. Ensure setting of cs bit in chip select register on chip select change. Fixes: fa236a7ef24048 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2018-03-14spi: bcm-qspi: fIX some error handling pathsChristophe Jaillet
For some reason, commit c0368e4db4a3 ("spi: bcm-qspi: Fix use after free in bcm_qspi_probe() in error path") has updated some gotos, but not all of them. This looks spurious, so fix it. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-10-12spi: bcm-qspi: Fix use after free in bcm_qspi_probe() in error pathFlorian Fainelli
There was an inversion in how the error path in bcm_qspi_probe() is done which would make us trip over a KASAN use-after-free report. Turns out that qspi->dev_ids does not get allocated until later in the probe process. Fix this by introducing a new lable: qspi_resource_err which takes care of cleaning up the SPI master instance. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2017-07-28spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependencyKamal Dasu
The newly added broadcom qspi driver in drivers/spi produces a build warning when CONFIG_MTD is disabled: include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp] There has been discussion on this in the link provided below. This fix in SPI controller drivers implementing the ->spi_flash_read handler, now uses the settings provided inside the 'struct spi_flash_read_message' parameter instead of hardcoding them. Made changes to bcm_qspi_bspi_set_flex_mode() to set the BSPI controller using the passed msg structure and remove the need to include <linux/mtd/spi-nor.h> file by removing all use of SPINOR_OP_READ* macros. Fixes: 4e3b2d236fe0 ("spi: bcm-qspi: Add BSPI spi-nor flash controller driver") Link: https://patchwork.kernel.org/patch/9624585/ Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-20Merge tag 'spi-v4.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "This release is mainly a collection of driver specific updates, including a few nice cleanups to make drivers use more core features. - automatically use the parent device to allocate DMA buffers if there wasn't an explicitly configured device. - fixes for leaks on allocation. - a small piece of the start of SPI slave support, a feature that's been on the cards for over a decade!" * tag 'spi-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (55 commits) spi: spi-ti-qspi: Fix error handling spi: spi-ti-qspi: Fix error handling spi: lantiq-ssc: activate under COMPILE_TEST spi: armada-3700: Remove spi_master_put in a3700_spi_remove() spi: ti-qspi: revise ti_qspi_probe() failure flow spi: spi-ep93xx: simplify GPIO chip selects spi: rspi: Replaces "n" by "len" in qspi_transfer_*() spi: rspi: Fixes bogus received byte in qspi_transfer_in() spi: bcm-qspi: Remove unnecessary platform_set_drvdata() spi: bcm-qspi: Fix bcm_qspi_bspi_read() performance spi: lantiq-ssc: add support for Lantiq SSC SPI controller spi: s3c64xx: fix inconsistency between binding and driver spi: armada-3700: Remove .owner field for driver spi: bcm-qspi: Added mspi read fallback in bcm_qspi_flash_read() spi: fix device-node leaks spi: mediatek: Only do dma for 4-byte aligned buffers spi: When no dma_chan map buffers with spi_master's parent spi: pca2xx-pci: Allow MSI spi: pxa2xx: Prepare for edge-triggered interrupts spi: pxa2xx: Add support for Intel Gemini Lake ...
2017-02-14spi: bcm-qspi: Remove unnecessary platform_set_drvdata()Wei Yongjun
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-14spi: bcm-qspi: Fix bcm_qspi_bspi_read() performanceKamal Dasu
Let bcm_qspi_bspi_flash_read() return all the requested bytes by breaking up the reads for BSPI block into optimal chunks size that a BSPI block can handle. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-10mtd: spi-nor: rename SPINOR_OP_* macros of the 4-byte address op codesCyrille Pitchen
This patch renames the SPINOR_OP_* macros of the 4-byte address instruction set so the new names all share a common pattern: the 4-byte address name is built from the 3-byte address name appending the "_4B" suffix. The patch also introduces new op codes to support other SPI protocols such as SPI 1-4-4 and SPI 1-2-2. This is a transitional patch and will help a later patch of spi-nor.c to automate the translation from the 3-byte address op codes into their 4-byte address version. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Marek Vasut <marek.vasut@gmail.com>
2017-01-31spi: bcm-qspi: Added mspi read fallback in bcm_qspi_flash_read()Kamal Dasu
Added mspi read fallback under certain circumstances like unaligned buffer, address on short reads. Also takes care of version 3.0 spi controller where flash address crosses 4MB boundary on transfers the driver resorts to mspi reads. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-24spi: iproc-qspi: Add Broadcom iProc SoCs supportKamal Dasu
This spi driver uses the common spi-bcm-qspi driver and implements iProc SoCs specific interrupt controller. The common driver now calls the SoC handlers when present. Adding support for both muxed l1 and unmuxed interrupt sources. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-16spi: bcm-qspi: Fix error return code in bcm_qspi_probe()Wei Yongjun
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-16spi: bcm-qspi: Fix return value check in bcm_qspi_probe()Wei Yongjun
In case of error, the function kcalloc() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-16spi: bcm-qspi: fix suspend/resume #ifdefArnd Bergmann
The two power management functions are define inside of an #ifdef but referenced unconditionally, which is obviously broken when CONFIG_PM_SLEEP is not set: drivers/spi/spi-bcm-qspi.c:1300:13: error: 'bcm_qspi_suspend' undeclared here (not in a function) drivers/spi/spi-bcm-qspi.c:1301:13: error: 'bcm_qspi_resume' undeclared here (not in a function) This replaces the #ifdef with a __maybe_unused annotation that lets the compiler figure out whether to drop the functions itself, and uses SIMPLE_DEV_PM_OPS() to refer to the functions. This will also fill the freeze/thaw/poweroff/restore callback pointers in addition to suspend/resume, but as far as I can tell, this is what we want. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-16spi: bcm-qspi: don't include linux/mtd/cfi.hArnd Bergmann
The header isn't actually needed here, but including it leads to a build warning when CONFIG_MTD is disabled: include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp] Fixes: fa236a7ef240 (spi: bcm-qspi: Add Broadcom MSPI driver) Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-14spi: bcm-qspi: Add BSPI spi-nor flash controller driverKamal Dasu
This change implements BSPI driver for Broadcom BRCMSTB, NS2, NSP SoCs works in combination with the MSPI controller driver and implements flash read acceleration and implements the spi_flash_read() method. Both MSPI and BSPI controllers are needed to access spi-nor flash. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-14spi: bcm-qspi: Add Broadcom MSPI driverKamal Dasu
Master SPI driver for Broadcom settop, iProc SoCs. The driver is used for devices that use SPI protocol on BRCMSTB, NSP, NS2 SoCs. SoC platform driver call exported porbe(), remove() and suspend/resume pm_ops implemented in this common driver. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy Signed-off-by: Mark Brown <broonie@kernel.org>
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