Commit graph

72 commits

Author SHA1 Message Date
Jon Hunter
65a5c3dd3e dmaengine: tegra-apb: Really fix runtime-pm usage
Commit edd3bdbe9d ("dmaengine: tegra-apb: Correct runtime-pm usage")
added pm_runtime_get/put() calls to the tegra-apb DMA system suspend
callbacks. Runtime PM is disabled during system suspend and so these
APIs cannot be used. Fix the suspend handling for the tegra-apb DMA by
moving the save and restore of the DMA register context into the
runtime PM suspend and resume callbacks, and then use the
pm_runtime_force_suspend/resume() APIs to invoke the runtime PM
callbacks during system suspend.

Fixes: edd3bdbe9d ("dmaengine: tegra-apb: Correct runtime-pm usage")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-06-30 11:13:44 +05:30
Dave Jiang
370c0446af dmaengine: tegra20-apb-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>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-08-08 08:11:41 +05:30
Vinod Koul
29274601a5 Merge branch 'topic/tegra' into for-linus 2016-07-16 20:10:42 +05:30
Jon Hunter
d3183447ef dmaengine: tegra-apb: Return the actual descriptor status
Commit 71f7e6cc55 ('dmaengine: tegra20-apb-dma: Only calculate residue
if txstate exists') changed the tegra_dma_tx_status() function to only
calculate the residue if there is a valid 'txstate' pointer for storing
the residue. Although this makes sense, this changed the behaviour of
the function tegra_dma_tx_status() such that if the pointer 'txstate' is
not valid, then we will return whatever state is returned by
dma_cookie_status() and no longer return the state by looking up the DMA
descriptor and returning it's state.

Please note that dma_cookie_status() will either return DMA_COMPLETE or
DMA_IN_PROGRESS. However, if dma_cookie_status() returns DMA_IN_PROGRESS
the actual status could be DMA_ERROR which will only be seen from
checking the descriptor status. Therefore, even if 'txstate' is not
valid, still check to see if there is a valid descriptor for the cookie
in question and if so return the descriptor state. Finally, ensure the
residue is still not calculated if the 'txstate' is not valid.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-30 08:53:15 +05:30
Jon Hunter
004f614ede dmaengine: tegra-apb: Remove duplicated residue calculation
The calculation of the DMA residue for the Tegra APB DMA is duplicated
in two places in the tegra_dma_tx_status() function. Remove this
duplicated code by moving calculation to the end of the function and
only calculating if we found a valid descriptor.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-30 08:53:15 +05:30
Jon Hunter
019bfcc65b dmaengine: tegra-apb: Correct grammar in TX status debug message
Correct the grammar in the debug message when no descriptor is found.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-30 08:53:15 +05:30
Peter Griffin
aef94fea97 dmaengine: Remove site specific OOM error messages on kzalloc
If kzalloc() fails it will issue it's own error message including
a dump_stack(). So remove the site specific error messages.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-21 21:35:00 +05:30
Peter Griffin
71f7e6cc55 dmaengine: tegra20-apb-dma: Only calculate residue if txstate exists.
There is no point calculating the residue if there is
no txstate to store the value.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-21 21:35:00 +05:30
Thierry Reding
7b0e00d912 dmaengine: tegra: Remove some whitespace funkiness
There are some places where whitespace is used in very funky ways. Fix
the most serious ones to make the code easier on the eye.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-14 23:30:49 +05:30
Shardar Shariff Md
00ef4490eb dmaengine: tegra-apb: proper default init of channel slave_id
Initialize default channel slave_id(req_sel) to invalid id
(i.e max supported slave id + 1) to avoid overwriting of slave_id
during tegra_dma_slave_config() with client data if slave_id
is not initialized through DT

Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-02 15:23:56 +05:30
Laxman Dewangan
242637bac7 dmaengine: tegra: Move of_device_id table near to its user
After using the function of_device_get_match_data(), the
of_device_id table for tegra20 dma is not used by probe()
and hence moving it near to place where platform driver is
defined as this table used only on this data structure.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-04 20:36:01 +05:30
Laxman Dewangan
333f16ec68 dmaengine: tegra: don't open code of_device_get_match_data()
Use of_device_get_match_data() for getting matched data
instead of implementing this locally.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03 21:22:07 +05:30
Jon Hunter
05e866b42e dmaengine: tegra-apb: Free interrupts before killing tasklets
On probe failure or driver removal, before killing any tasklets, ensure
that the channel interrupt is freed to ensure that another channel
interrupt cannot occur and schedule the tasklet again.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
8fe9739bc3 dmaengine: tegra-apb: Update driver to use GFP_NOWAIT
The tegra20-apb-dma driver currently uses the flag GFP_ATOMIC when
allocating memory for structures used in conjunction with the DMA
descriptors. It is preferred that dmaengine drivers use GFP_NOWAIT
instead and so the emergency memory pool will not be used by these
drivers.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
4aad5be040 dmaengine: tegra-apb: Only save channel state for those in use
Currently the tegra-apb DMA driver suspend/resume helpers, save and
restore the registers for all channels regardless of whether they are
in use or not. Change this so that only channels that have been
allocated and configured are saved and restored.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
68ae7a93fb dmaengine: tegra-apb: Save and restore word count
Newer tegra devices have a separate word count register per channel that
contains the number of words to be transferred. This register is not
saved or restored by the suspend/resume helpers for these newer devices
and so ensure that it is.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
286a6441a3 dmaengine: tegra-apb: Use dev_get_drvdata()
In the tegra_dma_runtime_suspend/resume functions, the pdev structure
is not needed, and so just call dev_get_drvdata() to get the device
data structure.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
edd3bdbe9d dmaengine: tegra-apb: Correct runtime-pm usage
The tegra-apb DMA driver enables runtime-pm but never calls
pm_runtime_get/put and hence the runtime-pm callbacks are never invoked.
The driver manages the clocks by directly calling clk_prepare_enable()
and clk_unprepare_disable().

Fix this by replacing the clk_prepare_enable() and clk_disable_unprepare()
with pm_runtime_get_sync() and pm_runtime_put(), respectively. Note that
the consequence of this is that if runtime-pm is disabled, then the clocks
will remain on the entire time the driver is loaded. However, if
runtime-pm is disabled, then power is not most likely not a concern.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-05 16:13:08 +05:30
Jon Hunter
23a1ec304a dmaengine: tegra-apb: Simplify locking for device using global pause
Sparse reports the following with regard to locking in the
tegra_dma_global_pause() and tegra_dma_global_resume() functions:

drivers/dma/tegra20-apb-dma.c:362:9: warning: context imbalance in
	'tegra_dma_global_pause' - wrong count at exit
drivers/dma/tegra20-apb-dma.c:366:13: warning: context imbalance in
	'tegra_dma_global_resume' - unexpected unlock

The warning is caused because tegra_dma_global_pause() acquires a lock
but does not release it. However, the lock is released by
tegra_dma_global_resume(). These pause/resume functions are called in
pairs and so it does appear to work.

This global pause is used on early tegra devices that do not have an
individual pause for each channel. The lock appears to be used to ensure
that multiple channels do not attempt to assert/de-assert the global pause
at the same time which could cause the DMA controller to be in the wrong
paused state. Rather than locking around the entire code between the pause
and resume, employ a simple counter to keep track of the global pause
requests. By using a counter, it is only necessary to hold the lock when
pausing and unpausing the DMA controller and hence, fixes the sparse
warning.

Please note that for devices that support individual channel pausing, the
DMA controller lock is not held between pausing and unpausing the channel.
Hence, this change will make the devices that use the global pause behave
in the same way, with regard to locking, as those that don't.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-20 12:10:25 +05:30
Jon Hunter
dc1ff4b30a dmaengine: tegra-apb: Remove unnecessary return statements and variables
Some void functions have unnecessary return statements at the end
(reported by sparse) and so remove these. Also remove the return variables
from functions tegra_dma_prep_slave_sg() and tegra_dma_prep_slave_cyclic()
because the value is not used.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-20 12:10:21 +05:30
Jon Hunter
13a3328638 dmaengine: tegra-apb: Avoid unnecessary channel base address calculation
Everytime a DMA channel register is accessed, the channel base address
is calculated by adding the DMA base address and the channel register
offset. Avoid this calculation and simply calculate the channel base
address once at probe time for each DMA channel.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-20 12:10:17 +05:30
Jon Hunter
c67886f5b8 dmaengine: tegra-apb: Remove unused variables
The callback and callback_param members of the tegra_dma_sg_req structure
are never used. The dma-engine structure, dma_async_tx_descriptor, defines
the same members and these are the ones used by the driver. Therefore,
remove the unused versions from the tegra_dma_sg_req structure.

The half_done member of tegra_dma_channel structure is configured but
never used and so remove it.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-20 12:10:06 +05:30
Paul Walmsley
891653ab83 dmaengine: tegra: add slave capabilities reporting
After commit ecc19d1786 ("dmaengine: Add
a warning for drivers not using the generic slave caps retrieval"),
the Tegra APB DMA driver causes this warning during boot:

WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830 dma_async_device_register+0x294/0x538()
this driver doesn't support generic slave capabilities reporting

Fix by setting the appropriate reporting structure fields that are
passed to dma_async_device_register().

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-01-14 00:00:30 +05:30
Vinod Koul
a7c439a458 dmaengine: tegra: fix incompatible pointer type warns
drivers/dma/tegra20-apb-dma.c:1428:37: warning: assignment from incompatible pointer type [enabled by default]
drivers/dma/ste_dma40.c: In function 'd40_terminate_all':

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
Maxime Ripard
662f1ac312 dmaengine: tegra20: Split device_control
Split the device_control callback of the NVidia Tegra20 APB 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 12:33:21 +05:30
Linus Torvalds
87c779baab Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
 "Main features this time are:

   - BAM v1.3.0 support form qcom bam dma
   - support for Allwinner sun8i dma
   - atmels eXtended DMA Controller driver
   - chancnt cleanup by Maxime
   - fixes spread over drivers"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (56 commits)
  dmaenegine: Delete a check before free_percpu()
  dmaengine: ioatdma: fix dma mapping errors
  dma: cppi41: add a delay while setting the TD bit
  dma: cppi41: wait longer for the HW to return the descriptor
  dmaengine: fsl-edma: fixup reg offset and hw S/G support in big-endian model
  dmaengine: fsl-edma: fix calculation of remaining bytes
  drivers/dma/pch_dma: declare pch_dma_id_table as static
  dmaengine: ste_dma40: fix error return code
  dma: imx-sdma: clarify about firmware not found error
  Documentation: devicetree: Fix Xilinx VDMA specification
  dmaengine: pl330: update author info
  dmaengine: clarify the issue_pending expectations
  dmaengine: at_xdmac: Add DMA_PRIVATE
  ARM: dts: at_xdmac: fix bad value of dma-cells in documentation
  dmaengine: at_xdmac: fix missing spin_unlock
  dmaengine: at_xdmac: fix a bug in transfer residue computation
  dmaengine: at_xdmac: fix software lockup at_xdmac_tx_status()
  dmaengine: at_xdmac: remove chancnt affectation
  dmaengine: at_xdmac: prefer usage of readl/writel_relaxed
  dmaengine: xdmac: fix print warning on dma_addr_t variable
  ...
2014-12-12 14:59:53 -08:00
Rafael J. Wysocki
ee343504f6 dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
After commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM in drivers/dma/nbpfaxi.c
and drivers/dma/tegra20-apb-dma.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
2014-12-05 23:28:59 +01:00
Kiran Padwal
cd166280b7 dmaengine: Remove .owner field for driver
There is no need to init .owner field.

Based on the patch from Peter Griffin <peter.griffin@linaro.org>
"mmc: remove .owner field for drivers using module_platform_driver"

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway."

Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
[for nvidia]
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-11-06 11:54:18 +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
Linus Torvalds
ca2a650f3d Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dma updates from Vinod Koul:
 - new driver for BCM2835 used in R-pi
 - new driver for MOXA ART
 - dma_get_any_slave_channel API for DT based systems
 - minor fixes and updates spread acrooss driver

[ The fsl-ssi dual fifo mode support addition clashed badly with the
  other changes to fsl-ssi that came in through the sound merge.  I did
  a very rough cut at fixing up the conflict, but Nicolin Chen (author
  of both sides) will need to verify and check things ]

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
  dmaengine: mmp_pdma: fix mismerge
  dma: pl08x: Export pl08x_filter_id
  acpi-dma: align documentation with kernel-doc format
  dma: fix vchan_cookie_complete() debug print
  DMA: dmatest: extend the "device" module parameter to 32 characters
  drivers/dma: fix error return code
  dma: omap: Set debug level to debugging messages
  dmaengine: fix kernel-doc style typos for few comments
  dma: tegra: add support for Tegra148/124
  dma: dw: use %pad instead of casting dma_addr_t
  dma: dw: join split up messages
  dma: dw: fix style of multiline comment
  dmaengine: k3dma: fix sparse warnings
  dma: pl330: Use dma_get_slave_channel() in the of xlate callback
  dma: pl330: Differentiate between submitted and issued descriptors
  dmaengine: sirf: Add device_slave_caps interface
  DMA: Freescale: change BWC from 256 bytes to 1024 bytes
  dmaengine: Add MOXA ART DMA engine driver
  dmaengine: Add DMA_PRIVATE to BCM2835 driver
  dma: imx-sdma: Assign a default script number for ROM firmware cases
  ...
2014-01-29 20:27:23 -08:00
Laxman Dewangan
911daccc8b dma: tegra: add support for Tegra148/124
Tegra148 introduces a few changes to the APB DMA HW registers. Update the
driver to cope with them. Tegra124 inherits these changes.

* The register address stride between DMA channels increases.

* A new per-channel WCOUNT register is introduced.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Kunal Agrawal <kunala@nvidia.com>
[swarren, remove .dts file change, rewrote commit description, removed
some duplicate/unused code and register IO]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-01-20 14:35:52 +05:30
Stephen Warren
996556c92a dma: tegra: register as an OF DMA controller
Call of_dma_controller_register() so that DMA clients can look up the
Tegra DMA controller using standard APIs. This requires the of_xlate()
function to save off the DMA slave ID, and for tegra_dma_slave_config()
not to over-write this information; once DMA client drivers are converted
to dma_request_slave_channel() and DT-based lookups, they won't set this
field of struct dma_slave_config anymore.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Thierry Reding <treding@nvidia.com>
2013-12-11 16:43:27 -07:00
Stephen Warren
9aa433d2a7 dma: tegra: use reset framework
Tegra's clock driver now provides an implementation of the common
reset API (include/linux/reset.h). Use this instead of the old Tegra-
specific API; that will soon be removed.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
2013-12-11 16:43:20 -07:00
Vinod Koul
00d696f529 dmaengine: tegra: 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 11:16:16 +05:30
Sachin Kamat
404ff6694a dma: tegra20-apb-dma: Staticize tegra_dma_prep_dma_cyclic
tegra_dma_prep_dma_cyclic is referenced only in this file.
Make it static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-10-07 07:41:38 +05:30
Andy Shevchenko
0a0aee203c tegra20-apb-dma: remove useless use of lock
Accordingly to dma_cookie_status() description locking is not required.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-05 09:32:25 +05:30
Dmitry Osipenko
7bdc1e272a dma: tegra: avoid channel lock up after free
Lock scenario: Channel 1 was allocated and prepared as slave_sg, used and freed.
Now preparation of cyclic dma on channel 1 will fail with err "DMA configuration
conflict" because tdc->isr_handler still setted to handle_once_dma_done.

This happens because tegra_dma_abort_all() won't be called on channel freeing
if pending list is empty and channel not busy. We need to clear isr_handler
on channel freeing to avoid locking.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:38 +05:30
Dmitry Osipenko
ac7ae754d5 dma: tegra20-apbdma: err message correction
Fixed err msg params order on irq request fail.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:37 +05:30
Wolfram Sang
627ad13a39 drivers/dma: don't check resource with devm_ioremap_resource
devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18 11:54:55 +02:00
Laxman Dewangan
3065c19467 dma: tegra: implement suspend/resume callbacks
Implement suspend/resume callbacks to store APB DMA channel's
register on suspend and restore APB DMA channel's register on
resume.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-05-02 22:19:20 +05:30
Stephen Warren
dc7badba19 dma: tegra: assume CONFIG_OF
Tegra only supports, and always enables, device tree. Remove all ifdefs
and runtime checks for DT support from the driver.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 09:51:18 +05:30
Linus Torvalds
5115f3c19d Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "This is fairly big pull by my standards as I had missed last merge
  window.  So we have the support for device tree for slave-dmaengine,
  large updates to dw_dmac driver from Andy for reusing on different
  architectures.  Along with this we have fixes on bunch of the drivers"

Fix up trivial conflicts, usually due to #include line movement next to
each other.

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (111 commits)
  Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT"
  ARM: dts: pl330: Add #dma-cells for generic dma binding support
  DMA: PL330: Register the DMA controller with the generic DMA helpers
  DMA: PL330: Add xlate function
  DMA: PL330: Add new pl330 filter for DT case.
  dma: tegra20-apb-dma: remove unnecessary assignment
  edma: do not waste memory for dma_mask
  dma: coh901318: set residue only if dma is in progress
  dma: coh901318: avoid unbalanced locking
  dmaengine.h: remove redundant else keyword
  dma: of-dma: protect list write operation by spin_lock
  dmaengine: ste_dma40: do not remove descriptors for cyclic transfers
  dma: of-dma.c: fix memory leakage
  dw_dmac: apply default dma_mask if needed
  dmaengine: ioat - fix spare sparse complain
  dmaengine: move drivers/of/dma.c -> drivers/dma/of-dma.c
  ioatdma: fix race between updating ioat->head and IOAT_COMPLETION_PENDING
  dw_dmac: add support for Lynxpoint DMA controllers
  dw_dmac: return proper residue value
  dw_dmac: fill individual length of descriptor
  ...
2013-02-26 09:24:48 -08:00
Linus Torvalds
bab588fcfb arm-soc: soc-specific updates
This is a larger set of new functionality for the existing SoC families,
 including:
 
 * vt8500 gains support for new CPU cores, notably the Cortex-A9 based wm8850
 * prima2 gains support for the "marco" SoC family, its SMP based cousin
 * tegra gains support for the new Tegra4 (Tegra114) family
 * socfpga now supports a newer version of the hardware including SMP
 * i.mx31 and bcm2835 are now using DT probing for their clocks
 * lots of updates for sh-mobile
 * OMAP updates for clocks, power management and USB
 * i.mx6q and tegra now support cpuidle
 * kirkwood now supports PCIe hot plugging
 * tegra clock support is updated
 * tegra USB PHY probing gets implemented diffently
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Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC-specific updates from Arnd Bergmann:
 "This is a larger set of new functionality for the existing SoC
  families, including:

   - vt8500 gains support for new CPU cores, notably the Cortex-A9 based
     wm8850

   - prima2 gains support for the "marco" SoC family, its SMP based
     cousin

   - tegra gains support for the new Tegra4 (Tegra114) family

   - socfpga now supports a newer version of the hardware including SMP

   - i.mx31 and bcm2835 are now using DT probing for their clocks

   - lots of updates for sh-mobile

   - OMAP updates for clocks, power management and USB

   - i.mx6q and tegra now support cpuidle

   - kirkwood now supports PCIe hot plugging

   - tegra clock support is updated

   - tegra USB PHY probing gets implemented diffently"

* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (148 commits)
  ARM: prima2: remove duplicate v7_invalidate_l1
  ARM: shmobile: r8a7779: Correct TMU clock support again
  ARM: prima2: fix __init section for cpu hotplug
  ARM: OMAP: Consolidate OMAP USB-HS platform data (part 3/3)
  ARM: OMAP: Consolidate OMAP USB-HS platform data (part 1/3)
  arm: socfpga: Add SMP support for actual socfpga harware
  arm: Add v7_invalidate_l1 to cache-v7.S
  arm: socfpga: Add entries to enable make dtbs socfpga
  arm: socfpga: Add new device tree source for actual socfpga HW
  ARM: tegra: sort Kconfig selects for Tegra114
  ARM: tegra: enable ARCH_REQUIRE_GPIOLIB for Tegra114
  ARM: tegra: Fix build error w/ ARCH_TEGRA_114_SOC w/o ARCH_TEGRA_3x_SOC
  ARM: tegra: Fix build error for gic update
  ARM: tegra: remove empty tegra_smp_init_cpus()
  ARM: shmobile: Register ARM architected timer
  ARM: MARCO: fix the build issue due to gic-vic-to-irqchip move
  ARM: shmobile: r8a7779: Correct TMU clock support
  ARM: mxs_defconfig: Select CONFIG_DEVTMPFS_MOUNT
  ARM: mxs: decrease mxs_clockevent_device.min_delta_ns to 2 clock cycles
  ARM: mxs: use apbx bus clock to drive the timers on timrotv2
  ...
2013-02-21 15:27:22 -08:00
Andy Shevchenko
a72208733f dma: tegra20-apb-dma: remove unnecessary assignment
There is no need to assign 0 to residue, because dma_cookie_status() does this
for us.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-02-14 20:00:54 +05:30
Olof Johansson
bda6f8e6cd ARM: tegra: Common Clock Framework rework
Tegra already supports the common clock framework, but had issues:
 
 1) The clock driver was located in arch/arm/mach-tegra/ rather than
    drivers/clk/.
 
 2) A single "Tegra clock" type was implemented, rather than separate
    clock types for PLL, mux, divider, ... type in HW.
 
 3) Clock lookups by device drivers were still driven by device name
    and connection ID, rather than through device tree.
 
 This pull request solves all three issues. This required some DT changes
 to add clocks properties, and driver changes to request clocks more
 "correctly". Finally, this rework allows all AUXDATA to be removed from
 Tegra board files, and various duplicate clock lookup entries to be
 removed from the driver.
 
 This pull request is based on the previous pull request, with tag
 tegra-for-3.9-cleanup.
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Merge tag 'tegra-for-3.9-soc-ccf' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc

From Stephen Warren:
ARM: tegra: Common Clock Framework rework

Tegra already supports the common clock framework, but had issues:

1) The clock driver was located in arch/arm/mach-tegra/ rather than
   drivers/clk/.

2) A single "Tegra clock" type was implemented, rather than separate
   clock types for PLL, mux, divider, ... type in HW.

3) Clock lookups by device drivers were still driven by device name
   and connection ID, rather than through device tree.

This pull request solves all three issues. This required some DT changes
to add clocks properties, and driver changes to request clocks more
"correctly". Finally, this rework allows all AUXDATA to be removed from
Tegra board files, and various duplicate clock lookup entries to be
removed from the driver.

This pull request is based on the previous pull request, with tag
tegra-for-3.9-cleanup.

* tag 'tegra-for-3.9-soc-ccf' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: (31 commits)
  clk: tegra30: remove unused TEGRA_CLK_DUPLICATE()s
  clk: tegra20: remove unused TEGRA_CLK_DUPLICATE()s
  ARM: tegra30: remove auxdata
  ARM: tegra20: remove auxdata
  ASoC: tegra: remove auxdata
  staging: nvec: remove use of clk_get_sys
  ARM: tegra: paz00: add clock information to DT
  ARM: tegra: add clock properties to Tegra30 DT
  ARM: tegra: add clock properties to Tegra20 DT
  spi: tegra: do not use clock name to get clock
  ARM: tegra: remove legacy clock code
  ARM: tegra: migrate to new clock code
  clk: tegra: add clock support for Tegra30
  clk: tegra: add clock support for Tegra20
  clk: tegra: add Tegra specific clocks
  ARM: tegra: define Tegra30 CAR binding
  ARM: tegra: define Tegra20 CAR binding
  ARM: tegra: move tegra_cpu_car.h to linux/clk/tegra.h
  ARM: tegra: add function to read chipid
  ARM: tegra: fix compile error when disable CPU_IDLE
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>

Conflicts:
	arch/arm/mach-tegra/board-dt-tegra20.c
	arch/arm/mach-tegra/board-dt-tegra30.c
	arch/arm/mach-tegra/common.c
	arch/arm/mach-tegra/platsmp.c
	drivers/clocksource/Makefile
2013-02-05 12:13:10 -08:00
Prashant Gaikwad
61fd290d21 ARM: tegra: migrate to new clock code
Migrate Tegra clock support to drivers/clk/tegra, this involves
moving:
1. definition of tegra_cpu_car_ops to clk.c
2. definition of reset functions to clk-peripheral.c
3. change parent of cpu clock.
4. Remove legacy clock initialization.
5. Initialize clocks using DT.
6. Remove all instance of mach/clk.h

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
[swarren: use to_clk_periph_gate().]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 11:19:07 -07:00
Greg Kroah-Hartman
422d26b6ec Merge 3.8-rc5 into driver-core-next
This resolves a gpio driver merge issue pointed out in linux-next.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-25 21:06:30 -08:00
Thierry Reding
7331205a96 dma: Convert to devm_ioremap_resource()
Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-25 12:21:46 -08:00
Linus Torvalds
3f58e0945e Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine fixes from Vinod Koul:
 "A few fixes on slave dmanengine.  There are trivial fixes in imx-dma,
  tegra-dma & ioat driver"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dma: tegra: implement flags parameters for cyclic transfer
  dmaengine: imx-dma: Disable use of hw_chain to fix sg_dma transfers.
  ioat: Fix DMA memory sync direction correct flag
2013-01-24 10:17:49 -08:00
Laxman Dewangan
b9bb37f548 dma: tegra: implement flags parameters for cyclic transfer
The flag parameter is added in the cyclic transfer request.
Use the flag option of:
- DMA_PREP_INTERRUPT for enabling interrupt.
- DMA_CTRL_ACK for deciding whether ack is requred or not for
  descriptor.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-09 06:13:32 -08:00