The function bcm_qspi_remove() returns zero unconditionally. Make it
return void.
This is a preparation for making platform remove callbacks return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20221017200143.1426528-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This fixes case where MSPI controller is used to access spi-nor
flash and BSPI block is not present.
Fixes: 5f195ee7d8 ("spi: bcm-qspi: Implement the spi_mem interface")
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220328142442.7553-1-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Apply only valid chip select value. This change fixes case where chip
select is set to initial value of '-1' during probe and PM supend and
subsequent resume can try to use the value with undefined behaviour.
Also in case where gpio based chip select, the check in
bcm_qspi_chip_select() shall prevent undefined behaviour on resume.
Fixes: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220127185359.27322-1-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Check requested speed for a given transfer before setting
27MHz or 108Mhz sysclk on SoCs that support both. This way
for baud rates below 212Khz we can use 27Mhz clock.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20211124193353.32311-2-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix the missing clk_disable_unprepare() before return
from bcm_qspi_probe() in the error handling case.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20211018073413.2029081-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This change set feature enahancements for spcr3 transfer modes as well as
adds support for half-duplex 3-wire mode transfer.
Kamal Dasu (3):
spi: bcm-qspi: Add mspi spcr3 32/64-bits xfer mode
spi: bcm-qspi: clear MSPI spifie interrupt during probe
spi: bcm-qspi: add support for 3-wire mode for half duplex transfer
drivers/spi/spi-bcm-qspi.c | 262 +++++++++++++++++++++++++++++--------
1 file changed, 208 insertions(+), 54 deletions(-)
--
2.17.1
This change configures the MSPI controller to use 3-wire interface when
a slave device devictree nodes indicates this via the optional property.
Signed-off-by: Kamal Dasu <kdasu@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211008203603.40915-4-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Adding 32-bits and 64-bits per transfer modes using the SPCR3
register settings provided in MSPI controller ver >= 1.5
Signed-off-by: Kamal Dasu <kdasu@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211008203603.40915-2-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Intermittent Kernel crash has been observed on probe in
bcm_qspi_mspi_l2_isr() handler when the MSPI spifie interrupt bit
has not been cleared before registering for interrupts.
Fix the driver to move SoC specific custom interrupt handling code
before we register IRQ in probe. Also clear MSPI interrupt status
resgiter prior to registering IRQ handlers.
Fixes: cc20a38612 ("spi: iproc-qspi: Add Broadcom iProc SoCs support")
Signed-off-by: Kamal Dasu <kdasu@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211008203603.40915-3-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The reason for dividing by zero is because the dummy bus width is zero,
but if the dummy n bytes is zero, it indicates that there is no data transfer,
so there is no need for calculation.
Fixes: 7512eaf541 ("spi: cadence-quadspi: Fix dummy cycle calculation when buswidth > 1")
Signed-off-by: Yoshitaka Ikeda <ikeda@nskint.co.jp>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/OSZPR01MB70049C8F56ED8902852DF97B8BD49@OSZPR01MB7004.jpnprd01.prod.outlook.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The 'delay_usecs' field is going away. The replacement for it is the
'delay' field. So, we should check for 'delay.value' being non-zero.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210308145502.1075689-4-aardelean@deviqon.com
Signed-off-by: Mark Brown <broonie@kernel.org>
bcm_qspi_remove() calls spi_unregister_master() even though
bcm_qspi_probe() calls devm_spi_register_master(). The spi_master is
therefore unregistered and freed twice on unbind.
Moreover, since commit 0392727c26 ("spi: bcm-qspi: Handle clock probe
deferral"), bcm_qspi_probe() leaks the spi_master allocation if the call
to devm_clk_get_optional() fails.
Fix by switching over to the new devm_spi_alloc_master() helper which
keeps the private data accessible until the driver has unbound and also
avoids the spi_master leak on probe.
While at it, fix an ordering issue in bcm_qspi_remove() wherein
spi_unregister_master() is called after uninitializing the hardware,
disabling the clock and freeing an IRQ data structure. The correct
order is to call spi_unregister_master() *before* those teardown steps
because bus accesses may still be ongoing until that function returns.
Fixes: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v4.9+: 123456789abc: spi: Introduce device-managed SPI controller allocation
Cc: <stable@vger.kernel.org> # v4.9+
Cc: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/5e31a9a59fd1c0d0b795b2fe219f25e5ee855f9d.1605121038.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
The Broadcom QSPI driver now falls back to no MSPI_DEV support as the
default setting in the generic compatible string, explicit settings for
STB chips 7425, 7429, and 7435 can be removed.
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200910152539.45584-4-ray.jui@broadcom.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add compatible string for BRCMSTB 7445 SoCs and indicate it has MSPI rev
support.
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200910152539.45584-2-ray.jui@broadcom.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Setting MSPI_SPCR3.fastbr=1 allows using clock divider (SPBR) values of
1-7, while the default value prohibits these values and requires a minimum
clock divider value of 8.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-8-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Older MIPS chips have a QSPI/MSPI controller that does not have the
MSPI_REV offset, reading from that offset will cause a bus error. Match
their compatible string and do not perform a read from that register in
that case.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-4-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The clock provider may not be ready by the time spi-bcm-qspi gets
probed, handle probe deferral using devm_clk_get_optional().
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200420190853.45614-2-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Currently we set the tx/rx buffer to 0xff when NULL. This causes
problems with some spi slaves where 0xff is a valid command. Looking
at other drivers, the tx/rx buffer is usually set to 0x00 when NULL.
Following this convention solves the issue.
Fixes: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200420190853.45614-6-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
SCMI only passes clk_prepare_enable() and clk_disable_unprepare(), made
changes to suspend/resume ops to use the appropriate calls so that PM
works for ARM and ARM64 platforms.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-7-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
As per the spi core implementation for MSPI devices when the transfer is
the last one in the message, the chip may stay selected until the next
transfer. On multi-device SPI busses with nothing blocking messages going
to other devices, this is just a performance hint; starting a message to
another device deselects this one. But in other cases, this can be used
to ensure correctness. Some devices need protocol transactions to be built
from a series of spi_message submissions, where the content of one message
is determined by the results of previous messages and where the whole
transaction ends when the chipselect goes intactive.
On CS change after completing the last serial transfer, the MSPI driver
drives SSb pin CDRAM register correctly according comments in core spi.h
as shown below:
case 1) EOM =1, cs_change =0: SSb inactive
case 2) EOM =1, cs_change =1: SSb active
case 3) EOM =0, cs_change =0: SSb active
case 4) EOM =0, cs_change =1: SSb inactive
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-5-kdasu.kdev@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use platform_get_irq_byname_optional() instead of platform_get_irq_byname()
to avoid below error message during probe:
[3.265115] bcm_iproc 68c70200.spi: IRQ spi_lr_fullness_reached not found
[3.272121] bcm_iproc 68c70200.spi: IRQ spi_lr_session_aborted not found
[3.284965] bcm_iproc 68c70200.spi: IRQ spi_lr_impatient not found
[3.291344] bcm_iproc 68c70200.spi: IRQ spi_lr_session_done not found
[3.297992] bcm_iproc 68c70200.spi: IRQ mspi_done not found
[3.303742] bcm_iproc 68c70200.spi: IRQ mspi_halted not found
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Link: https://lore.kernel.org/r/20200107040912.16426-1-rayagonda.kokatanur@broadcom.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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>
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: 5f195ee7d8 ("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>
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>
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: 345309fa7c ("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
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: 5f195ee7d8 ("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
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: c1f5ba70de ("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>
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>
Always confirm the BSPI_MAST_N_BOOT_CTRL bit when enabling
or disabling BSPI transfers.
Fixes: 4e3b2d236f ("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
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: fa236a7ef2 ("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
For some reason, commit c0368e4db4 ("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: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
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: fa236a7ef2 ("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
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: 4e3b2d236f ("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>
This release is mainly a collection of driver specific updates,
including a few nice cleanups to make drivers use more core features.
There
- 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!
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Merge tag 'spi-v4.11' of 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
...
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>
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>
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>
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>
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>
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Fixes: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Uwe Kleine-König