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  1. 07 7月, 2020 3 次提交
  3. 06 7月, 2020 1 次提交
  5. 01 7月, 2020 1 次提交
  7. 25 6月, 2020 1 次提交
  9. 22 6月, 2020 4 次提交
  11. 19 6月, 2020 2 次提交
  13. 17 6月, 2020 1 次提交
  15. 15 6月, 2020 1 次提交
  17. 11 6月, 2020 3 次提交
    • K
      spi: spi-fsl-dspi: Free DMA memory with matching function · 03fe7aaf
      由 Krzysztof Kozlowski 提交于 
      Driver allocates DMA memory with dma_alloc_coherent() but frees it with
dma_unmap_single().

This causes DMA warning during system shutdown (with DMA debugging) on
Toradex Colibri VF50 module:

    WARNING: CPU: 0 PID: 1 at ../kernel/dma/debug.c:1036 check_unmap+0x3fc/0xb04
    DMA-API: fsl-edma 40098000.dma-controller: device driver frees DMA memory with wrong function
      [device address=0x0000000087040000] [size=8 bytes] [mapped as coherent] [unmapped as single]
    Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
      (unwind_backtrace) from [<8010bb34>] (show_stack+0x10/0x14)
      (show_stack) from [<8011ced8>] (__warn+0xf0/0x108)
      (__warn) from [<8011cf64>] (warn_slowpath_fmt+0x74/0xb8)
      (warn_slowpath_fmt) from [<8017d170>] (check_unmap+0x3fc/0xb04)
      (check_unmap) from [<8017d900>] (debug_dma_unmap_page+0x88/0x90)
      (debug_dma_unmap_page) from [<80601d68>] (dspi_release_dma+0x88/0x110)
      (dspi_release_dma) from [<80601e4c>] (dspi_shutdown+0x5c/0x80)
      (dspi_shutdown) from [<805845f8>] (device_shutdown+0x17c/0x220)
      (device_shutdown) from [<80143ef8>] (kernel_restart+0xc/0x50)
      (kernel_restart) from [<801441cc>] (__do_sys_reboot+0x18c/0x210)
      (__do_sys_reboot) from [<80100060>] (ret_fast_syscall+0x0/0x28)
    DMA-API: Mapped at:
     dma_alloc_attrs+0xa4/0x130
     dspi_probe+0x568/0x7b4
     platform_drv_probe+0x6c/0xa4
     really_probe+0x208/0x348
     driver_probe_device+0x5c/0xb4

Fixes: 90ba3703 ("spi: spi-fsl-dspi: Add DMA support for Vybrid")
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1591803717-11218-1-git-send-email-krzk@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>
      03fe7aaf
    • Q
      spi: tools: Add macro definitions to fix build errors · 7bb64402
      由 Qing Zhang 提交于 
      Add SPI_TX_OCTAL and SPI_RX_OCTAL to fix the following build errors:

CC       spidev_test.o
spidev_test.c: In function ‘transfer’:
spidev_test.c:131:13: error: ‘SPI_TX_OCTAL’ undeclared (first use in this function)
  if (mode & SPI_TX_OCTAL)
             ^
spidev_test.c:131:13: note: each undeclared identifier is reported only once for each function it appears in
spidev_test.c:137:13: error: ‘SPI_RX_OCTAL’ undeclared (first use in this function)
  if (mode & SPI_RX_OCTAL)
             ^
spidev_test.c: In function ‘parse_opts’:
spidev_test.c:290:12: error: ‘SPI_TX_OCTAL’ undeclared (first use in this function)
    mode |= SPI_TX_OCTAL;
            ^
spidev_test.c:308:12: error: ‘SPI_RX_OCTAL’ undeclared (first use in this function)
    mode |= SPI_RX_OCTAL;
            ^
  LD       spidev_test-in.o
ld: cannot find spidev_test.o: No such file or directory

Additionally, maybe SPI_CS_WORD and SPI_3WIRE_HIZ will be used in the future,
so add them too.

Fixes: 896fa735 ("spi: spidev_test: Add support for Octal mode data transfers")
Signed-off-by: NQing Zhang <zhangqing@loongson.cn>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/1591880212-13479-2-git-send-email-zhangqing@loongson.cnSigned-off-by: NMark Brown <broonie@kernel.org>
      7bb64402
    • Q
      spi: tools: Make default_tx/rx and input_tx static · bd207791
      由 Qing Zhang 提交于 
      Fix the following sparse warning:

./spidev_test.c:50:9: warning: symbol 'default_tx' was not declared. Should it be static?
./spidev_test.c:59:9: warning: symbol 'default_rx' was not declared. Should it be static?
./spidev_test.c:60:6: warning: symbol 'input_tx' was not declared. Should it be static?
Signed-off-by: NQing Zhang <zhangqing@loongson.cn>
Link: https://lore.kernel.org/r/1591880212-13479-1-git-send-email-zhangqing@loongson.cnSigned-off-by: NMark Brown <broonie@kernel.org>
      bd207791
  19. 10 6月, 2020 1 次提交
  21. 09 6月, 2020 1 次提交
  23. 08 6月, 2020 1 次提交
  25. 02 6月, 2020 1 次提交
  27. 30 5月, 2020 10 次提交
    • A
      spi: spi-fsl-dspi: fix native data copy · 263b81dc
      由 Angelo Dureghello 提交于 
      ColdFire is a big-endian cpu with a big-endian dspi hw module,
so, it uses native access, but memcpy breaks the endianness.

So, if i understand properly, by native copy we would mean
be(cpu)->be(dspi) or le(cpu)->le(dspi) accesses, so my fix
shouldn't break anything, but i couldn't test it on LS family,
so every test is really appreciated.

Fixes: 53fadb4d ("spi: spi-fsl-dspi: Simplify bytes_per_word gymnastics")
Signed-off-by: NAngelo Dureghello <angelo.dureghello@timesys.com>
Tested-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20200529195756.184677-1-angelo.dureghello@timesys.comSigned-off-by: NMark Brown <broonie@kernel.org>
      263b81dc
    • S
      spi: Convert DW SPI binding to DT schema · 164c05f0
      由 Serge Semin 提交于 
      Modern device tree bindings are supposed to be created as YAML-files
in accordance with dt-schema. This commit replaces two DW SPI legacy
bare text bindings with YAML file. As before the bindings file states
that the corresponding dts node is supposed to be compatible either
with generic DW APB SSI controller or with Microsemi/Amazon/Renesas/Intel
vendors-specific controllers, to have registers, interrupts and clocks
properties. Though in case of Microsemi version of the controller
there must be two registers resources specified. Properties like
clock-names, reg-io-width, cs-gpio, num-cs, DMA and slave device
sub-nodes are optional.
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: NRob Herring <robh@kernel.org>
Cc: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Cc: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@vger.kernel.org
Link: https://lore.kernel.org/r/20200529182544.9807-1-Sergey.Semin@baikalelectronics.ruSigned-off-by: NMark Brown <broonie@kernel.org>
      164c05f0
    • A
      spi: dw: Refactor mid_spi_dma_setup() to separate DMA and IRQ config · 3d7db0f1
      由 Andy Shevchenko 提交于 
      It's better to understand what bits are set for DMA and for IRQ handling
in mid_spi_dma_setup() if they are grouped accordingly. Thus,
refactor mid_spi_dma_setup() to separate DMA and IRQ configuration.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200529183150.44149-2-andriy.shevchenko@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>
      3d7db0f1
    • A
      spi: dw: Make DMA request line assignments explicit for Intel Medfield · b3f82dc2
      由 Andy Shevchenko 提交于 
      The 2afccbd2 ("spi: dw: Discard static DW DMA slave structures")
did a clean up of global variables, which is fine, but messed up with
the carefully provided information in the custom DMA slave structures.
There reader can find an assignment of the DMA request lines in use.

Partially revert the above mentioned commit to restore readability
and maintainability of the code.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200529183150.44149-1-andriy.shevchenko@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>
      b3f82dc2
    • M
      spi: bcm2835: Remove shared interrupt support · d62069c2
      由 Mark Brown 提交于 
      This reverts commit ecfbd3cf since Lukas Wunner noticed that we
start operating on the hardware before we check to see if this is a
spurious interrupt.
Reported-by: NLukas Wunner <lukas@wunner.de>
Signed-off-by: NMark Brown <broonie@kernel.org>
      d62069c2
    • M
      Merge series "spi: dw: Add generic DW DMA controller support" from Serge Semin... · 08ba9306
      由 Mark Brown 提交于 
      Merge series "spi: dw: Add generic DW DMA controller support" from Serge Semin <Sergey.Semin@baikalelectronics.ru>:

Baikal-T1 SoC provides a DW DMA controller to perform low-speed peripherals
Mem-to-Dev and Dev-to-Mem transaction. This is also applicable to the DW
APB SSI devices embedded into the SoC. Currently the DMA-based transfers
are supported by the DW APB SPI driver only as a middle layer code for
Intel MID/Elkhart PCI devices. Seeing the same code can be used for normal
platform DMAC device we introduced a set of patches to fix it within this
series.

First of all we need to add the Tx and Rx DMA channels support into the DW
APB SSI binding. Then there are several fixes and cleanups provided as a
initial preparation for the Generic DMA support integration: add Tx/Rx
finish wait methods, clear DMAC register when done or stopped, Fix native
CS being unset, enable interrupts in accordance with DMA xfer mode,
discard static DW DMA slave structures, discard unused void priv pointer
and dma_width member of the dw_spi structure, provide the DMA Tx/Rx burst
length parametrisation and make sure it's optionally set in accordance
with the DMA max-burst capability.

In order to have the DW APB SSI MMIO driver working with DMA we need to
initialize the paddr field with the physical base address of the DW APB SSI
registers space. Then we unpin the Intel MID specific code from the
generic DMA one and placed it into the spi-dw-pci.c driver, which is a
better place for it anyway. After that the naming cleanups are performed
since the code is going to be used for a generic DMAC device. Finally the
Generic DMA initialization can be added to the generic version of the
DW APB SSI IP.

Last but not least we traditionally convert the legacy plain text-based
dt-binding file with yaml-based one and as a cherry on a cake replace
the manually written DebugFS registers read method with a ready-to-use
for the same purpose regset32 DebugFS interface usage.

This patchset is rebased and tested on the spi/for-next (5.7-rc5):
base-commit: fe9fce6b2cf3 ("Merge remote-tracking branch 'spi/for-5.8' into spi-next")

Link: https://lore.kernel.org/linux-spi/20200508132943.9826-1-Sergey.Semin@baikalelectronics.ru/
Changelog v2:
- Rebase on top of the spi repository for-next branch.
- Move bindings conversion patch to the tail of the series.
- Move fixes to the head of the series.
- Apply as many changes as possible to be applied the Generic DMA
  functionality support is added and the spi-dw-mid is moved to the
  spi-dw-dma driver.
- Discard patch "spi: dw: Fix dma_slave_config used partly uninitialized"
  since the problem has already been fixed.
- Add new patch "spi: dw: Discard unused void priv pointer".
- Add new patch "spi: dw: Discard dma_width member of the dw_spi structure".
  n_bytes member of the DW SPI data can be used instead.
- Build the DMA functionality into the DW APB SSI core if required instead
  of creating a separate kernel module.
- Use conditional statement instead of the ternary operator in the ref
  clock getter.

Link: https://lore.kernel.org/linux-spi/20200515104758.6934-1-Sergey.Semin@baikalelectronics.ru/
Changelog v3:
- Use spi_delay_exec() method to wait for the DMA operation completion.
- Explicitly initialize the dw_dma_slave members on stack.
- Discard the dws->fifo_len utilization in the Tx FIFO DMA threshold
  setting from the patch where we just add the default burst length
  constants.
- Use min() method to calculate the optimal burst values.
- Add new patch which moves the spi-dw.c source file to spi-dw-core.c in
  order to preserve the DW APB SSI core driver name.
- Add commas in the debugfs_reg32 structure initializer and after the last
  entry of the dw_spi_dbgfs_regs array.

Link: https://lore.kernel.org/linux-spi/20200521012206.14472-1-Sergey.Semin@baikalelectronics.ru
Changelog v4:
- Get back ndelay() method to wait for an SPI transfer completion.
  spi_delay_exec() isn't suitable for the atomic context.

Link: https://lore.kernel.org/linux-spi/20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru
Changelog v5:
- Refactor the Tx/Rx DMA-based SPI transfers wait methods.
- Add a new patch "spi: dw: Set xfer effective_speed_hz".
- Add a new patch "spi: dw: Return any value retrieved from the
  dma_transfer callback" as a preparation patch before implementing
  the local DMA, Tx SPI and Rx SPI transfers wait methods.
- Add a new patch "spi: dw: Locally wait for the DMA transactions
  completion", which provides a local DMA transaction complete
  method
- Create a dedicated patch which adds the Rx-done wait method:
  "spi: dw: Add SPI Rx-done wait method to DMA-based transfer".
- Add more detailed description of the problems the Tx/Rx-wait
  methods-related patches fix.
- Wait for the SPI Tx and Rx transfers being finished in the
  mid_spi_dma_transfer() method executed in the task context.
- Use spi_delay_exec() to wait for the SPI Tx/Rx completion, since now
  the driver calls the wait methods in the kernel thread context.
- Use SPI_DELAY_UNIT_SCK spi_delay unit for Tx-wait delay, since SPI
  xfer's are now have the effective_speed_hz initialized.
- Rx-wait for a delay correlated with the APB/SSI synchronous clock
  rate instead of using the SPI bus clock rate.

Link: https://lore.kernel.org/linux-spi/20200529035915.20790-1-Sergey.Semin@baikalelectronics.ru
Changelog v6:
- Provide a more detailed description of the patch:
  2901db35bea1 ("spi: dw: Locally wait for the DMA transfers completion")
- Calculate the Rx delay with better accuracy by moving 4-multiplication
  to the head of the formulae:
  ns = 4U * NSEC_PER_SEC / dws->max_freq * nents.
Co-developed-by: NGeorgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Signed-off-by: NGeorgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Co-developed-by: NRamil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: NRamil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Maxim Kaurkin <Maxim.Kaurkin@baikalelectronics.ru>
Cc: Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>
Cc: Ekaterina Skachko <Ekaterina.Skachko@baikalelectronics.ru>
Cc: Vadim Vlasov <V.Vlasov@baikalelectronics.ru>
Cc: Alexey Kolotnikov <Alexey.Kolotnikov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-spi@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Serge Semin (16):
  spi: dw: Set xfer effective_speed_hz
  spi: dw: Return any value retrieved from the dma_transfer callback
  spi: dw: Locally wait for the DMA transfers completion
  spi: dw: Add SPI Tx-done wait method to DMA-based transfer
  spi: dw: Add SPI Rx-done wait method to DMA-based transfer
  spi: dw: Parameterize the DMA Rx/Tx burst length
  spi: dw: Use DMA max burst to set the request thresholds
  spi: dw: Fix Rx-only DMA transfers
  spi: dw: Add core suffix to the DW APB SSI core source file
  spi: dw: Move Non-DMA code to the DW PCIe-SPI driver
  spi: dw: Remove DW DMA code dependency from DW_DMAC_PCI
  spi: dw: Add DW SPI DMA/PCI/MMIO dependency on the DW SPI core
  spi: dw: Cleanup generic DW DMA code namings
  spi: dw: Add DMA support to the DW SPI MMIO driver
  spi: dw: Use regset32 DebugFS method to create regdump file
  dt-bindings: spi: Convert DW SPI binding to DT schema

 .../bindings/spi/snps,dw-apb-ssi.txt          |  44 --
 .../bindings/spi/snps,dw-apb-ssi.yaml         | 127 +++++
 .../devicetree/bindings/spi/spi-dw.txt        |  24 -
 drivers/spi/Kconfig                           |  15 +-
 drivers/spi/Makefile                          |   5 +-
 drivers/spi/{spi-dw.c => spi-dw-core.c}       |  95 ++--
 drivers/spi/spi-dw-dma.c                      | 482 ++++++++++++++++++
 drivers/spi/spi-dw-mid.c                      | 382 --------------
 drivers/spi/spi-dw-mmio.c                     |   4 +
 drivers/spi/spi-dw-pci.c                      |  50 +-
 drivers/spi/spi-dw.h                          |  20 +-
 11 files changed, 719 insertions(+), 529 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
 create mode 100644 Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
 delete mode 100644 Documentation/devicetree/bindings/spi/spi-dw.txt
 rename drivers/spi/{spi-dw.c => spi-dw-core.c} (82%)
 create mode 100644 drivers/spi/spi-dw-dma.c
 delete mode 100644 drivers/spi/spi-dw-mid.c

--
2.26.2
      08ba9306
    • D
      dt-bindings: snps,dw-apb-ssi: add optional reset property · 2604d487
      由 Dinh Nguyen 提交于 
      Add optional reset property.
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20200529155806.16758-2-dinguyen@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>
      2604d487
    • D
      spi: dw: add reset control · 7830c0ef
      由 Dinh Nguyen 提交于 
      Add mechanism to get the reset control and deassert it in order to bring
the IP out of reset.
Signed-off-by: NLiang Jin J <liang.j.jin@ericsson.com>
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20200529155806.16758-1-dinguyen@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>
      7830c0ef
    • M
      spi: bcm2835: Enable shared interrupt support · ecfbd3cf
      由 Martin Sperl 提交于 
      bcm2711, Rasberry Pi 4's SoC, shares one interrupt for multiple
instances of the bcm2835 SPI controller. So this enables shared
interrupt support for them.

The early bail out in the interrupt routine avoids messing with buffers
of transfers being done by other means. Otherwise, the driver can handle
receiving interrupts asserted by other controllers during an IRQ based
transfer.
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Signed-off-by: NNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: NFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200528185805.28991-1-nsaenzjulienne@suse.deSigned-off-by: NMark Brown <broonie@kernel.org>
      ecfbd3cf
    • F
      spi: bcm2835: Implement shutdown callback · 118eb0e5
      由 Florian Fainelli 提交于 
      Make sure we clear the FIFOs, stop the block, disable the clock and
release the DMA channel.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200528190605.24850-1-f.fainelli@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>
      118eb0e5
  29. 29 5月, 2020 9 次提交