Commit graph

70 commits

Author SHA1 Message Date
Fabio Estevam
cc2afb0d4c dmaengine: mxs-dma: Remove the unused .id_table
The mxs-dma driver is only used by DT platforms and the .id_table
is unused.

Get rid of it to simplify the code.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20201123193051.17285-1-festevam@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-24 22:55:15 +05:30
Allen Pais
6afe87786e dmaengine: mxs-dma: convert tasklets to use new tasklet_setup() API
In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200831103542.305571-18-allen.lkml@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-18 12:19:06 +05:30
Robin Murphy
6c609220c3 dmaengine: mxs: Drop local dma_parms
Since commit 9495b7e92f ("driver core: platform: Initialize dma_parms
for platform devices"), struct platform_device already provides a
dma_parms structure, so we can save allocating another one.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/dc0fb6963067b9c799873d761661ed6dce1426ec.1599164692.git.robin.murphy@arm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-11 17:42:13 +05:30
Linus Torvalds
47ebe00b68 dmaengine updates for v5.3-rc1
- Add support in dmaengine core to do device node checks for DT devices and
    update bunch of drivers to use that and remove open coding from drivers
  - New driver/driver support for new hardware, namely:
    - MediaTek UART APDMA
    - Freescale i.mx7ulp edma2
    - Synopsys eDMA IP core version 0
    - Allwinner H6 DMA
  - Updates to axi-dma and support for interleaved cyclic transfers
  - Greg's debugfs return value check removals on drivers
  - Updates to stm32-dma, hsu, dw, pl330, tegra drivers
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Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:

 - Add support in dmaengine core to do device node checks for DT devices
   and update bunch of drivers to use that and remove open coding from
   drivers

 - New driver/driver support for new hardware, namely:
     - MediaTek UART APDMA
     - Freescale i.mx7ulp edma2
     - Synopsys eDMA IP core version 0
     - Allwinner H6 DMA

 - Updates to axi-dma and support for interleaved cyclic transfers

 - Greg's debugfs return value check removals on drivers

 - Updates to stm32-dma, hsu, dw, pl330, tegra drivers

* tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits)
  dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support"
  dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback
  Documentation: dmaengine: clean up description of dmatest usage
  dmaengine: tegra210-adma: remove PM_CLK dependency
  dmaengine: fsl-edma: add i.mx7ulp edma2 version support
  dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma
  dmaengine: fsl-edma-common: version check for v2 instead
  dmaengine: fsl-edma-common: move dmamux register to another single function
  dmaengine: fsl-edma: add drvdata for fsl-edma
  dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver"
  dmaengine: rcar-dmac: Reject zero-length slave DMA requests
  dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake
  dmaengine: dw-edma: fix semicolon.cocci warnings
  dmaengine: sh: usb-dmac: Use [] to denote a flexible array member
  dmaengine: dmatest: timeout value of -1 should specify infinite wait
  dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit
  dmaengine: fsl-edma: support little endian for edma driver
  dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width"
  dmagengine: pl330: add code to get reset property
  dt-bindings: pl330: document the optional resets property
  ...
2019-07-17 09:55:43 -07:00
Sascha Hauer
ef347c0cfd mtd: rawnand: gpmi: Implement exec_op
The gpmi driver performance suffers from NAND operations being split
in multiple small DMA transfers. This has been forced by the NAND layer
in the former days, but now with exec_op we can use the controller as
intended.

With this patch gpmi_nfc_exec_op becomes the main entry point to NAND
operations. Here all instructions are collected and chained as separate
DMA transfers. In the end whole chain is fired and waited to be
finished. gpmi_nfc_exec_op only does the hardware operations, bad block
marker swapping and buffer scrambling is done by the callers. It's worth
noting that the nand_*_op functions always take the buffer lengths for
the data that the NAND chip actually transfers. When doing BCH we have
to calculate the net data size from the raw data size in some places.

This patch has been tested with 2048/64 and 2048/128 byte NAND on
i.MX6q. mtd_oobtest, mtd_subpagetest and mtd_speedtest run without
errors. nandbiterrs, nandpagetest and nandsubpagetest userspace tests
from mtdutils run without errors and UBIFS can successfully be mounted.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2019-06-27 20:05:30 +02:00
Sascha Hauer
ceeeb99cd8 dmaengine: mxs: rename custom flag
The mxs dma driver uses the flags parameter in dmaengine_prep_slave_sg() for
custom flags, but still uses the dmaengine specific names of the flags.
Do a little bit better and at least give the flag a custom name.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2019-06-27 20:05:30 +02:00
Sascha Hauer
e0ddaab768 dmaengine: mxs: Add header file to be shared with gpmi nand driver
The mxs dma driver can do PIO transfers. A pointer to the PIO words
to transfer is passed in the struct scatterlist * argument of
dmaengine_prep_slave_sg(). It's quite ugly and non obvious to cast
u32 * to struct scatterlist * each time when calling
dmaengine_prep_slave_sg(), so add a static inline wrapper function
to be called by the user along with a description what is going on.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2019-06-27 20:05:29 +02:00
Sascha Hauer
d443cb25c0 dmaengine: mxs: Drop unnecessary flag
The mxs dma driver insists on having the DMA_PREP_INTERRUPT flag set
on all but the first transfer. There's no need to let the user set this
flag, the driver can do it internally whenever it needs it. Drop
handling of this flag from the driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2019-06-27 20:05:29 +02:00
Baolin Wang
caf5e3e6e1 dmaengine: mxs-dma: Let the core do the device node validation
Let the DMA engine core do the device node validation instead of drivers.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-05-27 11:23:52 +05:30
Luis Chamberlain
750afb08ca cross-tree: phase out dma_zalloc_coherent()
We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.

This change was generated with the following Coccinelle SmPL patch:

@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@

-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-01-08 07:58:37 -05:00
Huang Shijie
fbb69ece04 dmaengine: mxs-dma: use dmaenginem_async_device_register to simplify the code
Use dmaenginem_async_device_register to simplify the code:
	remove dma_async_device_unregister.

Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-08-29 21:43:18 +05:30
Fabio Estevam
d9617a3f2b dmaengine: mxs-dma: Switch to SPDX identifier
Adopt the SPDX license identifier headers to ease license compliance
management.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-05-23 11:10:31 +05:30
Fabio Estevam
4aff2f9355 dmaengine: mxs: Use %zu for printing a size_t variable
Use %zu for printing a size_t variable in order to fix the following
build warning:

drivers/dma/mxs-dma.c: In function 'mxs_dma_prep_dma_cyclic':
drivers/dma/mxs-dma.c:621:5: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat]

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-06-15 09:44:45 +05:30
Vinod Koul
f35d7633f5 Merge branch 'topic/no_irq' into for-linus 2016-10-03 09:18:29 +05:30
Arnd Bergmann
028e84a1de dmaengine: mxs: remove NO_IRQ check
The mxs_chan->chan_irq variable is guaranteed to never be NO_IRQ,
as it gets assigned the result of platform_get_irq() that returns
either a valid positive interrupt number, or a negative failure
code that leads to the channel not being used.

This removes the redundant check, eliminating one more instance
of NO_IRQ.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-05 16:40:52 +05:30
Dave Jiang
064370c6a1 dmaengine: mxs-dma: convert callback to helper function
This is in preperation of moving to a callback that provides results to the
callback for the transaction. The conversion will maintain current behavior
and the driver must convert to new callback mechanism at a later time in
order to receive results.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-08-08 08:11:40 +05:30
Krzysztof Kozlowski
0d8505045e dmaengine: mxs: Constify platform_device_id
The platform_device_id is not modified by the driver and core uses it as
const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-05-04 16:38:55 +05:30
Fabio Estevam
ef9d2a9233 dmaengine: mxs-dma: Declare slave capabilities for the generic code
Since ecc19d1786 ("dmaengine: Add a warning for drivers not using the
generic slave caps retrieval") the following warning is observed:

[    0.113023] ------------[ cut here ]------------
[    0.113053] WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830 dma_async_device_register+0x2a0/0x4c8()
[    0.113063] this driver doesn't support generic slave capabilities reporting

Declare the slave capabilities to avoid such warning.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-01-13 23:48:40 +05:30
Vinod Koul
f67bcc4042 dmaengine: mxs-dma: fix unused variable warn
drivers/dma/mxs-dma.c: In function 'mxs_dma_terminate_all':
drivers/dma/mxs-dma.c:662:23: warning: unused variable 'mxs_chan'[-Wunused-variable]

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-22 12:34:23 +05:30
Vinod Koul
a29c395636 dmaengine: mxs-dma: fix incompatible pointer type build warns
drivers/dma/mxs-dma.c: In function 'mxs_dma_probe':
drivers/dma/mxs-dma.c:848:35: warning: assignment from incompatible pointer type [enabled by default]
drivers/dma/mxs-dma.c:849:36: warning: assignment from incompatible pointer type [enabled by default]

The function prototype expects return type 'int' whereas these where void

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-22 12:34:23 +05:30
Vinod Koul
e0cad7a00d dmaengine: mxs-dma: fix the arg to mxs_dma_reset_chan()
mxs_dma_reset_chan() expects struct dma_chan * as argument but we were
providing struct dma_chan, so fix this

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-22 12:34:22 +05:30
Maxime Ripard
5c9d2e37ac dmaengine: mxs: Split device_control
Split the device_control callback of the Freescale MXS DMA driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-22 12:29:06 +05:30
Laurent Pinchart
31c1e5a135 dmaengine: Remove the context argument to the prep_dma_cyclic operation
The argument is always set to NULL and never used. Remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-08-04 13:41:50 +05:30
Joe Perches
9f92d2232d dmaengine: Use dma_zalloc_coherent
Use the zeroing function instead of dma_alloc_coherent & memset(,0,)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-07-14 22:29:35 +05:30
Markus Pargmann
2dcbdce361 dma: mxs-dma: Use semaphores for cyclic DMA
mxs dma channel hardware reset command is not reliable and can cause
a channel stall. The only way to fix the channel stall is a DMA engine
reset.

To avoid channel resets we use the hardware semaphore counter. For each
transmitted segment, the DMA channel will decrease the counter by one.
To use this mechanism with cyclic DMA, we need to increase the semaphore
counter with each completed DMA command in the interrupt handler. To
avoid any interruptions between the DMA transfers, the semaphore counter
is initialized with 2. This way the counter can be increased in the
interrupt handler without an influence on the transfer of the DMA
engine.

When disabling the channel, we stop increasing the semaphore counter in
the interrupt handler.

This patch was tested on i.MX28 with the SAIF DMA channel.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 15:38:31 +05:30
Markus Pargmann
bb3660f130 dma: mxs-dma: Update state after channel reset
After a channel reset, the channel stops running automatically. The
state update was missing so that a channel perperation right after a
channel reset failed.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 15:38:30 +05:30
Markus Pargmann
702e94d66b dma: mxs-dma: Fix channel reset hardware bug
This is no official errata, but I noticed that the channel reset may
stop working if the DMA state engine is in the READ_FLUSH state.

This patch uses the channel debug1 register to wait for the DMA
statemachine to leave the READ_FLUSH state. After that we can continue
to reset the channel.

Tested on i.MX28.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 15:38:30 +05:30
Markus Pargmann
7b11304a3c dma: mxs-dma: Report correct residue for cyclic DMA
Use the channel's buffer address register to calculate correct residue
value for tx_status.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 15:38:30 +05:30
Markus Pargmann
b2d639890b dma: mxs-dma: Cleanup interrupt handler
The DMA interrupt handler uses its controll registers to handle all
available channel interrupts it can find.

This patch changes it to handle only one interrupt by directly mapping
irq number to channel. It also includes a cleanup of the ctrl-register
usage.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 15:38:30 +05:30
Vinod Koul
2737583ea0 dmaengine: mxs-dma: use DMA_COMPLETE for dma completion status
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-10-25 11:16:10 +05:30
Shawn Guo
b1baec525e dma: mxs-dma: remove code left from generic DMA binding conversion
With all mxs-dma clients moved to use generic DMA helper, the code
left from generic DMA binding conversion can be removed now.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-19 14:20:21 +05:30
Andy Shevchenko
09d16690cb mxs-dma: remove useless variable
last_used variable is applied only once, so, let's substitute it by its value.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-05 09:32:24 +05:30
Fabio Estevam
3208b3701b dma: mxs-dma: Staticize mxs_dma_xlate
Fix the following sparse warning:

drivers/dma/mxs-dma.c:696:17: warning: symbol 'mxs_dma_xlate' was not declared. Should it be static?

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:33 +05:30
Shawn Guo
d84f638b03 dma: mxs-dma: move to generic device tree binding
Update mxs-dma driver to adopt generic DMA device tree binding.  It
calls of_dma_controller_register() with mxs specific of_dma_xlate to
get the generic DMA device tree helper support.  Then DMA clients only
need to call dma_request_slave_channel() for requesting a DMA channel
from dmaengine.

The existing way of requesting channel, clients directly call
dma_request_channel(), still work there, and will be removed after
all mxs-dma clients get converted to generic DMA device tree helper.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2013-04-04 21:22:43 +08:00
Shawn Guo
aaa20517c0 dma: mxs-dma: use devm_* managed functions
Use devm_* managed functions to simplify probe() error handling.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2013-04-04 21:22:43 +08:00
Fabio Estevam
f2ad699254 dma: mxs-dma: Fix build warnings with W=1
Fix the following warnings when building with W=1 option:

drivers/dma/mxs-dma.c: In function 'mxs_dma_alloc_chan_resources':
drivers/dma/mxs-dma.c:368:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c: In function 'mxs_dma_prep_slave_sg':
drivers/dma/mxs-dma.c:481:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c:494:3: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c:515:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
drivers/dma/mxs-dma.c: In function 'mxs_dma_prep_dma_cyclic':
drivers/dma/mxs-dma.c:563:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-08 07:35:27 -08:00
Linus Torvalds
b7e97d2211 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "This time we have Andy updates on dw_dmac which is attempting to make
  this IP block available as PCI and platform device though not fully
  complete this time.

  We also have TI EDMA moving the dma driver to use dmaengine APIs, also
  have a new driver for mmp-tdma, along with bunch of small updates.

  Now for your excitement the merge is little unusual here, while
  merging the auto merge on linux-next picks wrong choice for pl330
  (drivers/dma/pl330.c) and this causes build failure.  The correct
  resolution is in linux-next.  (DMA: PL330: Fix build error) I didn't
  back merge your tree this time as you are better than me so no point
  in doing that for me :)"

Fixed the pl330 conflict as in linux-next, along with trivial header
file conflicts due to changed includes.

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (29 commits)
  dma: tegra: fix interrupt name issue with apb dma.
  dw_dmac: fix a regression in dwc_prep_dma_memcpy
  dw_dmac: introduce software emulation of LLP transfers
  dw_dmac: autoconfigure data_width or get it via platform data
  dw_dmac: autoconfigure block_size or use platform data
  dw_dmac: get number of channels from hardware if possible
  dw_dmac: fill optional encoded parameters in register structure
  dw_dmac: mark dwc_dump_chan_regs as inline
  DMA: PL330: return ENOMEM instead of 0 from pl330_alloc_chan_resources
  DMA: PL330: Remove redundant runtime_suspend/resume functions
  DMA: PL330: Remove controller clock enable/disable
  dmaengine: use kmem_cache_zalloc instead of kmem_cache_alloc/memset
  DMA: PL330: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
  ARM: EXYNOS: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
  dma: tegra: use list_move_tail instead of list_del/list_add_tail
  mxs/dma: Enlarge the CCW descriptor area to 4 pages
  dw_dmac: utilize slave_id to pass request line
  dmaengine: mmp_tdma: add dt support
  dmaengine: mmp-pdma support
  spi: davici - make davinci select edma
  ...
2012-10-10 11:10:41 +09:00
Peter Ujfalusi
ec8b5e48c0 dmaengine: Pass flags via device_prep_dma_cyclic() callback
Change the parameter list of device_prep_dma_cyclic() so the DMA drivers
can receive the flags coming from clients.
This feature can be used during audio operation to disable all audio
related interrupts when the DMA_PREP_INTERRUPT is cleared from the flags.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-22 11:12:45 -04:00
Marek Vasut
5e97fa9149 mxs/dma: Enlarge the CCW descriptor area to 4 pages
In case of a large SPI flash, the amount of DMA descriptors
available to the DMA driver is not large enough anymore. For
example 8MB SPI flash now needs 129 descriptors to be transfered
in one long read. There are currently 53 descriptors available in
one PAGE_SIZE-big block. Enlarge the allocated descriptor area to
four PAGE_SIZE blocks to fulfill such requirements.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dan Williams <djbw@fb.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-09-14 08:31:47 +05:30
Attila Kinali
41c556a8cb dma: mxs-dma: Export missing symbols from mxs-dma.c
mxs-dma.c provides two functions mxs_dma_is_apbh and mxs_dma_is_apbx
which are used at least in mxs-mmc.c. Building mxs-mmc as module
fails due to those two symbols not being exported.

Signed-off-by: Attila Kinali <attila@kinali.ch>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-16 11:59:22 +05:30
Huang Shijie
f5c55847f7 dma: enable mxs-dma for imx6q
enable the mxs-dma for imx6q.
Also remove the unused header file.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-06-07 14:55:37 +05:30
Linus Torvalds
84a442b9a1 arm-soc: device tree conversions, part 2
These continue the device tree work from part 1, this set is for the
 tegra, mxs and imx platforms, all of which have dependencies on clock
 or pinctrl changes submitted earlier.
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Merge tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull arm-soc device tree conversions (part 2) from Olof Johansson:
 "These continue the device tree work from part 1, this set is for the
  tegra, mxs and imx platforms, all of which have dependencies on clock
  or pinctrl changes submitted earlier."

Fix up trivial conflicts due to nearby changes in
drivers/{gpio/gpio,i2c/busses/i2c}-mxs.c

* tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (73 commits)
  ARM: dt: tegra: invert status=disable vs status=okay
  ARM: dt: tegra: consistent basic property ordering
  ARM: dt: tegra: sort nodes based on bus order
  ARM: dt: tegra: remove duplicate device_type property
  ARM: dt: tegra: consistenly use lower-case for hex constants
  ARM: dt: tegra: format regs properties consistently
  ARM: dt: tegra: gpio comment cleanup
  ARM: dt: tegra: remove unnecessary unit addresses
  ARM: dt: tegra: whitespace cleanup
  ARM: dt: tegra cardhu: fix typo in SDHCI node name
  ARM: dt: tegra: cardhu: register core regulator tps62361
  ARM: dt: tegra30.dtsi: Add SMMU node
  ARM: dt: tegra20.dtsi: Add GART node
  ARM: dt: tegra30.dtsi: Add Memory Controller(MC) nodes
  ARM: dt: tegra20.dtsi: Add Memory Controller(MC) nodes
  ARM: dt: tegra: Add device tree support for AHB
  ARM: dts: enable audio support for imx28-evk
  ARM: dts: enable i2c device for imx28-evk
  i2c: mxs: add device tree probe support
  ARM: dts: enable mmc for imx28-evk
  ...
2012-05-26 12:57:47 -07:00
Dong Aisheng
90c9abc5b7 dma: mxs-dma: add device tree probe support
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
2012-05-12 13:32:18 +08:00
Shawn Guo
8c92013643 dma: mxs-dma: make platform_device_id more generic
Rewrite mxs_dma_is_apbh and mxs_dma_is_apbx in order to support
other SoCs like imx6q and reform the platform_device_id for the
better further dt support.

Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
2012-05-12 13:32:17 +08:00
Shawn Guo
bb11fb63fc dma: mxs-dma: let dma_is_apbh and apbh_is_old take parameter
Let macros dma_is_apbh and apbh_is_old take mxs_dma as parameter
to make the code easy to read.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2012-05-12 13:32:17 +08:00
Dong Aisheng
f5b7efccdb dma: mxs-dma: use global stmp_device functionality
This can get rid of the mach-dependency.

Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
2012-05-12 13:32:17 +08:00
Lars-Peter Clausen
fdaf9c4b22 dmaengine: Use dma_sg_len(sg) instead of sg->length
sg->length may or may not contain the length of the dma region to transfer,
depending on the architecture - dma_sg_len(sg) always will though. For the
architectures which use the drivers modified by this patch it probably is the
case that sg->length contains the dma transfer length. But to be consistent and
future proof change them to use dma_sg_len.

To quote Russel King:
	sg->length is meaningless to something performing DMA.

	In cases where sg_dma_len(sg) and sg->length are the same storage, then
	there's no problem. But scatterlists _can_ (and one some architectures) do
	split them - especially when you have an IOMMU which can allow you to
	combine a scatterlist into fewer entries.

	So, anything using sg->length for the size of a scatterlist's DMA transfer
	_after_ a call to dma_map_sg() is almost certainly buggy.

The patch has been generated using the following coccinelle patch:
<smpl>
@@
struct scatterlist *sg;
expression X;
@@
-sg[X].length
+sg_dma_len(&sg[X])
@@
struct scatterlist *sg;
@@
-sg->length
+sg_dma_len(sg)
</smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-05-11 12:04:38 +05:30
Shawn Guo
d04525ed03 dma: mxs-dma: enable channel in device_issue_pending call
Enable channel in device_issue_pending call, so that the order between
cookie assignment and channel enabling can be ensured naturally.

It fixes the mxs gpmi-nand breakage which is caused by the incorrect
order of cookie assigning and channel enabling.

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Huang Shijie <b32955@freescale.com>
Tested-by <samgandhi9@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-04-20 15:35:58 +05:30
Linus Torvalds
623ff7739e MTD merge for 3.4
Artem's cleanup of the MTD API continues apace.
 Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst others.
 More work on DiskOnChip G3, new driver for DiskOnChip G4.
 Clean up debug/warning printks in JFFS2 to use pr_<level>.
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Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6

Pull MTD changes from David Woodhouse:
 - Artem's cleanup of the MTD API continues apace.
 - Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst
   others.
 - More work on DiskOnChip G3, new driver for DiskOnChip G4.
 - Clean up debug/warning printks in JFFS2 to use pr_<level>.

Fix up various trivial conflicts, largely due to changes in calling
conventions for things like dmaengine_prep_slave_sg() (new inline
wrapper to hide new parameter, clashing with rewrite of previously last
parameter that used to be an 'append' flag, and is now a bitmap of
'unsigned long flags').

(Also some header file fallout - like so many merges this merge window -
and silly conflicts with sparse fixes)

* tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits)
  mtd: docg3 add protection against concurrency
  mtd: docg3 refactor cascade floors structure
  mtd: docg3 increase write/erase timeout
  mtd: docg3 fix inbound calculations
  mtd: nand: gpmi: fix function annotations
  mtd: phram: fix section mismatch for phram_setup
  mtd: unify initialization of erase_info->fail_addr
  mtd: support ONFI multi lun NAND
  mtd: sm_ftl: fix typo in major number.
  mtd: add device-tree support to spear_smi
  mtd: spear_smi: Remove default partition information from driver
  mtd: Add device-tree support to fsmc_nand
  mtd: fix section mismatch for doc_probe_device
  mtd: nand/fsmc: Remove sparse warnings and errors
  mtd: nand/fsmc: Add DMA support
  mtd: nand/fsmc: Access the NAND device word by word whenever possible
  mtd: nand/fsmc: Use dev_err to report error scenario
  mtd: nand/fsmc: Use devm routines
  mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform
  mtd: fsmc_nand: add pm callbacks to support hibernation
  ...
2012-03-30 17:31:56 -07:00
Huang Shijie
921de864b7 mxs-dma : rewrite the last parameter of mxs_dma_prep_slave_sg()
[1] Background :
    The GPMI does ECC read page operation with a DMA chain consist of three DMA
    Command Structures. The middle one of the chain is used to enable the BCH,
    and read out the NAND page.

    The WAIT4END(wait for command end) is a comunication signal between
    the GPMI and MXS-DMA.

[2] The current DMA code sets the WAIT4END bit at the last one, such as:

    +-----+               +-----+                      +-----+
    | cmd | ------------> | cmd | ------------------>  | cmd |
    +-----+               +-----+                      +-----+
                                                          ^
                                                          |
                                                          |
                                                     set WAIT4END here

    This chain works fine in the mx23/mx28.

[3] But in the new GPMI version (used in MX50/MX60), the WAIT4END bit should
    be set not only at the last DMA Command Structure,
    but also at the middle one, such as:

    +-----+               +-----+                      +-----+
    | cmd | ------------> | cmd | ------------------>  | cmd |
    +-----+               +-----+                      +-----+
                             ^                            ^
                             |                            |
                             |                            |
                        set WAIT4END here too        set WAIT4END here

    If we do not set WAIT4END, the BCH maybe stalls in "ECC reading page" state.
    In the next ECC write page operation, a DMA-timeout occurs.
    This has been catched in the MX6Q board.

[4] In order to fix the bug, rewrite the last parameter of mxs_dma_prep_slave_sg(),
    and use the dma_ctrl_flags:
    ---------------------------------------------------------
      DMA_PREP_INTERRUPT : append a new DMA Command Structrue.
      DMA_CTRL_ACK       : set the WAIT4END bit for this DMA Command Structure.
    ---------------------------------------------------------

[5] changes to the relative drivers:
    <1> For mxs-mmc driver, just use the new flags, do not change any logic.
    <2> For gpmi-nand driver, and use the new flags to set the DMA
        chain, especially for ecc read page.

Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-03-27 00:37:28 +01:00