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path: root/drivers/dma/amba-pl08x.c
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2014-01-28dma: pl08x: Export pl08x_filter_idSachin Kamat
Export the symbol so that it is accessible to modules. Fixes the following error: ERROR: "pl08x_filter_id" [sound/soc/samsung/snd-soc-s3c-dma.ko] undefined! Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-12-18dma: pl08x: allow zero slave channelsLinus Walleij
It might happen that a platform wants to use its DMA engine for memcpy only, and then we have zero slave channels to initialize, so allow the slave initialization to return zero. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-12-04Fix pl08x warningsRussell King - ARM Linux
drivers/dma/amba-pl08x.c: In function 'pl08x_desc_free': drivers/dma/amba-pl08x.c:1173:2: warning: passing argument 1 of 'dma_descriptor_unmap' from incompatible pointer type include/linux/dmaengine.h:476:91: note: expected 'struct dma_async_tx_descriptor *' but argument is of type 'struct pl08x_txd *' Fixes: d38a8c622a1b ("dmaengine: prepare for generic 'unmap' data") Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-20Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine changes from Vinod Koul: "This brings for slave dmaengine: - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as dmaengine can only transfer and not verify validaty of dma transfers - Bunch of fixes across drivers: - cppi41 driver fixes from Daniel - 8 channel freescale dma engine support and updated bindings from Hongbo - msx-dma fixes and cleanup by Markus - DMAengine updates from Dan: - Bartlomiej and Dan finalized a rework of the dma address unmap implementation. - In the course of testing 1/ a collection of enhancements to dmatest fell out. Notably basic performance statistics, and fixed / enhanced test control through new module parameters 'run', 'wait', 'noverify', and 'verbose'. Thanks to Andriy and Linus [Walleij] for their review. - Testing the raid related corner cases of 1/ triggered bugs in the recently added 16-source operation support in the ioatdma driver. - Some minor fixes / cleanups to mv_xor and ioatdma" * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits) dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers dma: mv_xor: Remove unneeded NULL address check ioat: fix ioat3_irq_reinit ioat: kill msix_single_vector support raid6test: add new corner case for ioatdma driver ioatdma: clean up sed pool kmem_cache ioatdma: fix selection of 16 vs 8 source path ioatdma: fix sed pool selection ioatdma: Fix bug in selftest after removal of DMA_MEMSET. dmatest: verbose mode dmatest: convert to dmaengine_unmap_data dmatest: add a 'wait' parameter dmatest: add basic performance metrics dmatest: add support for skipping verification and random data setup dmatest: use pseudo random numbers dmatest: support xor-only, or pq-only channels in tests dmatest: restore ability to start test at module load and init dmatest: cleanup redundant "dmatest: " prefixes dmatest: replace stored results mechanism, with uniform messages Revert "dmatest: append verify result to results" ...
2013-11-16Merge commit 'dmaengine-3.13-v2' of ↵Vinod Koul
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine Pull dmaengine changes from Dan 1/ Bartlomiej and Dan finalized a rework of the dma address unmap implementation. 2/ In the course of testing 1/ a collection of enhancements to dmatest fell out. Notably basic performance statistics, and fixed / enhanced test control through new module parameters 'run', 'wait', 'noverify', and 'verbose'. Thanks to Andriy and Linus for their review. 3/ Testing the raid related corner cases of 1/ triggered bugs in the recently added 16-source operation support in the ioatdma driver. 4/ Some minor fixes / cleanups to mv_xor and ioatdma. Conflicts: drivers/dma/dmatest.c Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-14dmaengine: remove DMA unmap from driversBartlomiej Zolnierkiewicz
Remove support for DMA unmapping from drivers as it is no longer needed (DMA core code is now handling it). Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> [djbw: fix up chan2parent() unused warning in drivers/dma/dw/core.c] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-11-13dmaengine: prepare for generic 'unmap' dataDan Williams
Add a hook for a common dma unmap implementation to enable removal of the per driver custom unmap code. (A reworked version of Bartlomiej Zolnierkiewicz's patches to remove the custom callbacks and the size increase of dma_async_tx_descriptor for drivers that don't care about raid). Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> [bzolnier: prepare pl330 driver for adding missing unmap while at it] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-10-31DMA-API: dma: pl08x: add dma_set_mask_and_coherent() callRussell King
The DMA API requires drivers to call the appropriate dma_set_mask() functions before doing any DMA mapping. Add this required call to the AMBA PL08x driver. Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-25dmaengine: amba-pl08x: use DMA_COMPLETE for dma completion statusVinod Koul
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>
2013-10-13dma: misc: remove deprecated IRQF_DISABLEDMichael Opdenacker
This patch proposes to remove the use of the IRQF_DISABLED flag It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-10Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine updates from Vinod Koul: "This pull brings: - Andy's DW driver updates - Guennadi's sh driver updates - Pl08x driver fixes from Tomasz & Alban - Improvements to mmp_pdma by Daniel - TI EDMA fixes by Joel - New drivers: - Hisilicon k3dma driver - Renesas rcar dma driver - New API for publishing slave driver capablities - Various fixes across the subsystem by Andy, Jingoo, Sachin etc..." * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits) dma: edma: Remove limits on number of slots dma: edma: Leave linked to Null slot instead of DUMMY slot dma: edma: Find missed events and issue them ARM: edma: Add function to manually trigger an EDMA channel dma: edma: Write out and handle MAX_NR_SG at a given time dma: edma: Setup parameters to DMA MAX_NR_SG at a time dmaengine: pl330: use dma_set_max_seg_size to set the sg limit dmaengine: dma_slave_caps: remove sg entries dma: replace devm_request_and_ioremap by devm_ioremap_resource dma: ste_dma40: Fix potential null pointer dereference dma: ste_dma40: Remove duplicate const dma: imx-dma: Remove redundant NULL check dma: dmagengine: fix function names in comments dma: add driver for R-Car HPB-DMAC dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap() dma: imx-sdma: Staticize sdma_driver_data structures pch_dma: Add MODULE_DEVICE_TABLE dmaengine: PL08x: Add cyclic transfer support dmaengine: PL08x: Fix reading the byte count in cctl dmaengine: PL08x: Add support for different maximum transfer size ...
2013-09-02dmaengine: PL08x: Add cyclic transfer supportAlban Bedel
Many audio interface drivers require support of cyclic transfers to work correctly, for example Samsung ASoC DMA driver. This patch adds support for cyclic transfers to the amba-pl08x driver. Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de> [tfiga: Rebase and slightly beautify the original patch.] Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Fix reading the byte count in cctlAlban Bedel
There are more fields than just SWIDTH in CH_CONTROL register, so read register value must be masked in addition to shifting. Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de> Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Add support for different maximum transfer sizeTomasz Figa
PL080S has separate register to store transfer size in, allowing single transfer to be much larger than in standard PL080. This patch makes the amba-pl08x driver aware of this and removes writing transfer size to reserved bits of CH_CONTROL register on PL080S, which was not a problem witn transfer sizes fitting the original bitfield of PL080, but now would overwrite other fields. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Add support for PL080S variantTomasz Figa
PL080S is a modified version of PL080 that can be found on Samsung SoCs, such as S3C6400 and S3C6410. It has different offset of CONFIG register, separate CONTROL1 register that holds transfer size and larger maximum transfer size. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Move LLI dumping code into separate functionTomasz Figa
This patch refactors debugging code that dumps LLI entries by moving it into separate function, which is stubbed when VERBOSE_DEBUG is not selected. This allows us to get rid of the ugly ifdef from the body of pl08x_fill_llis_for_desc(). No functional change is introduced by this patch. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Rework LLI handling to be less fragileTomasz Figa
Currently memory allocated for LLIs is casted to an array of structs, which is fragile and also limits the driver to a single, predefined LLI layout, while there are some variants of PL08x, which have more fields in LLI (namely PL080S with its extra CCTL2). This patch makes LLIs a sequence of 32-bit words, which is just filled with appropriate values in appropriate order and padded with required amount of dummy words (currently zero, but PL080S will make better use of this). Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Add support for different offset of CONFIG registerTomasz Figa
Some variants of PL08x (namely PL080S, found in Samsung S3C64xx SoCs) have CONFIG register at different offset. This patch makes the driver use offset from vendor data struct. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02dmaengine: PL08x: Refactor pl08x_getbytes_chan() to lower indentationTomasz Figa
Further patch will introduce support for PL080S, which requires some things to be done conditionally, thus increasing indentation level of some functions even more. This patch reduces indentation level of pl08x_getbytes_chan() function by inverting several conditions and returning from function wherever possible. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-22DMA: fix printk warning in AMBA PL08x DMA driverAndre Przywara
In Rob's recent pull request the patch ARM: highbank: select ARCH_DMA_ADDR_T_64BIT for LPAE promotes dma_addr_t to 64bit, so printk generates a warning about an incorrect type. Fix this by casting it to u64 and using %llx. Fixing long lines on the way. Signed-off-by: Andre Przywara <andre.przywara@linaro.org> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-08-22DMA: fix AMBA PL08x compilation issue with 64bit DMA address typeAndre Przywara
When dma_addr_t is 64 bits long, compilation of the AMBA PL08x DMA driver breaks due to a missing 64bit%8bit modulo operation. Looking more closely the divisor in these operations can only be 1, 2 or 4, so the full featured '%' modulo operation is overkill and can be replaced with simple bit masking. Change from v1: Replace open-coded function with existing IS_ALIGNED macro and use a macro around that to avoid a line becoming too long. Signed-off-by: Andre Przywara <andre.przywara@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-07-05dmaengine: PL08x: Avoid collisions with get_signal() macroMark Brown
As pointed out by Arnd Bergmann there is a get_signal macro definied in linux/signal.h which can conflict with the platform data callback function of the same name leading to confusing errors from the compiler (especially if signal.h manages to get pulled into the driver itself due to header dependencies). Avoid such errors by renaming get_signal and put_signal in the platform data to get_xfer_signal and put_xfer_signal. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-13pl080.h: moved from arm/include/asm/hardware to include/linux/amba/Alessandro Rubini
The header is used by drivers/dma/amba-pl08x.c, which can be compiled under x86, where PL080 exists under a PCI-to-AMBA bridge. This patche moves it where it can be accessed by other architectures, and fixes all users. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-07dma: amba-pl08x: use vchan_dma_desc_free_listAkinobu Mita
vchan_dma_desc_free_list() iterates through each virt_dma_desc in the specified list_head and calls vchan->desc_free(). We can use it instead of repeated execution of pl08x_desc_free() for each virt_dma_desc in the list_head. Because vchan->desc_free callback is set as pl08x_desc_free() for amba-pl08x driver. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <djbw@fb.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-08-22drivers/dma/amba-pl08x.c: fix error return codeJulia Lawall
Convert a 0 error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-01dmaengine: PL08x: ensure all descriptors are freed when channel is releasedRussell King
Ensure all queued descriptors are freed when the channel is released, ensuring we don't leak memory Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: get rid of write only pool_ctr and free_txd lockingRussell King
The free function says the pl08x lock should be taken before calling it. However, the DMA pool allocation/freeing is already properly locked. The only thing that would need this is pool_ctr, which happens to be a write-only variable. Let's get rid of this, and eliminate any need for additional locking here. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: get rid of pl08x_prep_channel_resourcesRussell King
This function is now unnecessary; we can move its internals inline instead. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: fix tx_status function to return correct residueRussell King
Now that we're converted to use the generic vchan support, we can fix the residue return from tx_status to be compliant with dmaengine. This returns the number of bytes remaining for the _specified_ cookie, not the number of bytes in all pending transfers on the channel. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: convert to use vchan done listRussell King
Convert to use the virtual dma channel done list, tasklet, and descriptor freeing. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: convert to use vchan submitted/issued listsRussell King
Convert to use the virtual dma channel submitted/issued descriptor lists rather than our own private lists, and use the virtual dma channel support functions to manage these lists. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: use vchan's spinlockRussell King
Initialize the vchan struct, and use the provided spinlock rather than our own. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: convert to use virt-dma structsRussell King
Convert PL08x to use the virt-dma structures. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: rejig physical channel allocationRussell King
Rework the physical channel allocation mechanism to only allocate physical channels to virtual channels when they're about to be used. This eliminates all the complexity with holding channels while descriptors are being prepared, which is completely unnecessary. This also brings this driver to a state where the generic virtual DMA code can be used with this driver, and opens up the possibility of properly scheduling and prioritorising physical DMA channels to virtual DMA channels. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: start next descriptor from irq contextRussell King
Rather than waiting for the tasklet to run, we can start the next descriptor from interrupt context, as soon as we know that the previous descriptor has completed. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: split the pend_list in twoRussell King
Our behaviour wasn't correct; issue_pending is supposed to be called before any submitted descriptors are available for processing by the DMA engine. Split the pend_list in two, one for submitted descriptors and another list for issued descriptors. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: re-jig the starting of txdsRussell King
Rather than code the de-queue of the txd several times, move that into the start_txd function. Rename this to better illustrate what it's now doing, and call this function when starting a delayed memcpy(). Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: remove waiting descriptor pointerRussell King
As we no longer need to pass a descriptor to prep_phy_channel(), we don't need to keep track of the descriptor which is waiting for a channel to become available. So let's get rid of it. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: move DMA signal muxing into slave prepare codeRussell King
Move the DMA request muxing into the slave prepare code and txd release/completion code. This means we only hold the DMA request mux while there are descriptors waiting to be started or are in progress. This leaves txd->direction as a write-only variable; remove it. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: convert to a list of completed descriptorsRussell King
Convert PL08x to use a list of completed descriptors rather than merely relying upon a single pointer. This makes it possible to schedule the tasklet for other purposes, and makes our behaviour similar to virt-dma. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: track mux usage on a per-channel basis.Russell King
Keep track of the number of descriptors currently using a MUX setting on a per-channel basis. This allows us to know when we have descriptors queued somewhere which have been assigned a DMA request signal. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: move DMA signal muxing into pl08x_dma_chan structRussell King
Move the signal handling out of the physical channel structure into the virtual channel structure, where it should belong as it has more to do with the virtual channel than the physical one. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: split DMA signal muxing from channel allocRussell King
Split the DMA request mux signal handling from the physical channel allocation code. The physical channel has very little to do with the DMA request input which will be used, so these should be two separate operations. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: get rid of unnecessary checks in dma_slave_configRussell King
Get rid of the unnecessary checks in dma_slave_config utilizing the DMA direction. This allows us to move the computation of cctl to the prepare function. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: ignore 'direction' argument in dma_slave_configRussell King
Ignore the direction argument in dma_slave_config, and configure both directions independently. We still check that the configuration for the intended direction is valid; this check will eventually be dropped. This check is just for debugging at present. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: extract function to to generate cctl valuesRussell King
Extract the functionality from dma_slave_config to generate the cctl values for a given bus width and burst size. This allows us to use this elsewhere in the driver, namely the prepare functions. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: move the bus and increment selection to dma prepare functionRussell King
Move the bus and transfer increment selection to the DMA prepare function rather than the slave configuration function. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: get rid of device_fc in struct pl08x_dma_chanRussell King
As we now store the dma_slave_config in pl08x_dma_chan, we don't need to store this separately. Use the one in dma_slave_config directly. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: get src/dst addr direct from dma_slave_config structRussell King
Add a dma_slave_config struct to struct pl08x_dma_chan, and move the src_addr/dst_addr arguments into this struct. This is a step away from using the dma_slave_config's direction member. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01dmaengine: PL08x: constify channel names and bus_id stringsRussell King
Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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