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path: root/drivers/dma/sh
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2013-02-26Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
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 ...
2013-01-20dma: sh/shdma-base.c: remove unnecessary null pointer checkCong Ding
the variable chan is dereferenced in line 635, so it is no reason to check null again in line 641. Signed-off-by: Cong Ding <dinggnu@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-08dma: sh: Don't use ENODEV for failing slave lookupGuennadi Liakhovetski
If dmaengine driver's .device_alloc_chan_resources() method returns -ENODEV, dma_request_channel() will decide, that the driver has been removed and will remove the device from its list. To prevent this use ENXIO if a slave lookup fails. Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: stable@vger.kernel.org Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2013-01-03Drivers: dma: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Viresh Kumar <viresh.linux@gmail.com> Cc: Dan Williams <djbw@fb.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Barry Song <baohua.song@csr.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devinitBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Li Yang <leoli@freescale.com> Cc: Zhang Wei <zw@zh-kernel.org> Cc: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devexit_pBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Acked-by: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-01dmaengine: shdma: restore partial transfer calculationGuennadi Liakhovetski
The recent shdma driver split has mistakenly removed support for partial DMA transfer size calculation on forced termination. This patch restores it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-07-20dma: sh: provide a migration path for slave drivers to stop using .privateGuennadi Liakhovetski
This patch extends the sh dmaengine driver to support the preferred channel selection and configuration method, instead of using the "private" field from struct dma_chan. We add a standard filter function to be used by slave drivers instead of implementing their own ones, and add support for the DMA_SLAVE_CONFIG control operation, which must accompany the new channel selection method. We still support the legacy .private channel allocation method to cater for a smooth driver migration. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> [applied a trvial checkpath fix] Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-20dma: sh: use an integer slave ID to improve API compatibilityGuennadi Liakhovetski
Initially struct shdma_slave has been introduced with the only member - an unsigned slave ID - to describe common properties of DMA slaves in an extensible way. However, experience shows, that a slave ID is indeed the only parameter, needed to identify DMA slaves. This is also, what is used by the core dmaengine API in struct dma_slave_config. We switch to using the slave_id directly, instead of passing a pointer to struct shdma_slave to improve compatibility with the core. We also make the slave_id signed for easier error checking. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-20dmaengine: shdma: prepare to stop using struct dma_chan::privateGuennadi Liakhovetski
Using struct dma_chan::private is deprecated. To update the shdma driver to stop using it we first have to eliminate internal runtime uses of it. After that we will also be able to stop using it for channel configuration. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-20dmaengine: shdma: (cosmetic) simplify a static functionGuennadi Liakhovetski
dmae_find_slave() needs only the slave_id field from the slave object, no need to pass the pointer to the object, pass the slave_id directly. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-13dma: shdma: convert to the shdma base libraryGuennadi Liakhovetski
The shdma base library has originally been extracted from the shdma driver, which now can be converted to actually use it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-13dmaengine: add an shdma-base libraryGuennadi Liakhovetski
This patch extracts code from shdma.c, that does not directly deal with hardware implementation details and can be re-used with diverse DMA controller variants, found on SH-based SoCs. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-07-13dma: move shdma driver to an own directoryGuennadi Liakhovetski
The shdma driver is going to be split into multiple files. To make this more convenient move it to an own directory. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>