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path: root/drivers/dma/pl330.c
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2012-06-14DMA: PL330: Fix racy mutex unlockJavi Merino
pl330_update() stores a pointer to the thrd->req that finished, which contains a pointer to the corresponding pl330_req. This is done with the pl330_lock held. Then, it iterates through the req_done list, calling the callback for each of the requests that are done. The problem is that the driver releases the lock before calling the callback for each of the callbacks. pl330_submit_req() running in another processor can then acquire the lock and insert another request in one of the thrd->req that hasn't been processed yet, replacing the pointer to pl330_req there. When the callback returns in pl330_update() and the next rqdone is popped from the list, it dereferences the pl330_req pointer to the just scheduled pl330_req, instead of the one that has finished, calling pl330 with the wrong r. This patch fixes this by storing the pointer to pl330_req directly in the list. Signed-off-by: Javi Merino <javi.merino@arm.com> Cc: Jassi Brar <jaswinder.singh@linaro.org> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-06-07DMA: PL330: Add missing static storage class specifierSachin Kamat
Fixes the following sparse warning: drivers/dma/pl330.c:2542:5: warning: symbol 'add_desc' was not declared. Should it be static? Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-06-07dmaengine: pl330: dont complete descriptor for cyclic dmaTushar Behera
Commit eab215855803 ("dmaengine: pl330: dont complete descriptor for cyclic dma") wrongly completes descriptor for cyclic dma, hence following BUG_ON is still hit with cyclic DMA operations. kernel BUG at drivers/dma/dmaengine.h:53! Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com> Cc: stable <stable@vger.kernel.org>
2012-05-11DMA: PL330: Remove duplicate header file inclusionSachin Kamat
Removes <linux/interrupt.h> file which was included twice. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-05-11dmaengine: pl330: dont complete descriptor for cyclic dmaVinod Koul
the cookie updates completed the cyclic dma descriptor wrongly. This caused the BUG_ON to be hit as submit is called for completed descriptor Fix this by not marking the cyclic descriptor as complete Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com> Tested-by: Thomas Abraham <thomas.abraham@linaro.org>
2012-04-25dma: pl330: fix a couple of compilation warningsOlof Johansson
Move a couple of tests and do a minor refactor to avoid: drivers/dma/pl330.c: In function 'pl330_probe': drivers/dma/pl330.c:2929:215: warning: comparison of distinct pointer types lacks a cast [enabled by default] drivers/dma/pl330.c: In function 'pl330_tasklet': drivers/dma/pl330.c:2250:8: warning: 'pch' may be used uninitialized in this function [-Wuninitialized] drivers/dma/pl330.c:2228:25: note: 'pch' was declared here drivers/dma/pl330.c:2277:130: warning: 'pch' may be used uninitialized in this function [-Wuninitialized] drivers/dma/pl330.c:2260:25: note: 'pch' was declared here Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-29Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine update from Vinod Koul: "This includes the cookie cleanup by Russell, the addition of context parameter for dmaengine APIs, more arm dmaengine driver cleanup by moving code to dmaengine, this time for imx by Javier and pl330 by Boojin along with the usual driver fixes." Fix up some fairly trivial conflicts with various other cleanups. * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (67 commits) dmaengine: imx: fix the build failure on x86_64 dmaengine: i.MX: Fix merge of cookie branch. dmaengine: i.MX: Add support for interleaved transfers. dmaengine: imx-dma: use 'dev_dbg' and 'dev_warn' for messages. dmaengine: imx-dma: remove 'imx_dmav1_baseaddr' and 'dma_clk'. dmaengine: imx-dma: remove unused arg of imxdma_sg_next. dmaengine: imx-dma: remove internal structure. dmaengine: imx-dma: remove 'resbytes' field of 'internal' structure. dmaengine: imx-dma: remove 'in_use' field of 'internal' structure. dmaengine: imx-dma: remove sg member from internal structure. dmaengine: imx-dma: remove 'imxdma_setup_sg_hw' function. dmaengine: imx-dma: remove 'imxdma_config_channel_hw' function. dmaengine: imx-dma: remove 'imxdma_setup_mem2mem_hw' function. dmaengine: imx-dma: remove dma_mode member of internal structure. dmaengine: imx-dma: remove data member from internal structure. dmaengine: imx-dma: merge old dma-v1.c with imx-dma.c dmaengine: at_hdmac: add slave config operation dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic dmaengine/dma_slave: introduce inline wrappers dma: imx-sdma: Treat firmware messages as warnings instead of erros ...
2012-03-21dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclicAlexandre Bounine
Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic() interfaces to allow passing client/target specific information associated with the data transfer. Modify all affected DMA engine drivers. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-16ARM: 7362/1: AMBA: Add module_amba_driver() helper macro for amba_driverviresh kumar
For simple modules that contain a single amba_driver without any additional setup code then ends up being a block of duplicated boilerplate. This patch adds a new macro, module_amba_driver(), which replaces the module_init()/module_exit() registrations with template functions. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-03-13Merge branch 'rmk_cookie_fixes2' into nextVinod Koul
Conflicts: drivers/dma/imx-dma.c drivers/dma/pl330.c Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: pl330: fix the pl330 build after cookie cleanupVinod Koul
drivers/dma/pl330.c: In function 'pl330_control': drivers/dma/pl330.c:342: error: 'struct dma_pl330_chan' has no member named 'completed' Reported by: Jassi Brar <jassisinghbrar@gmail.com> Suggested by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate initialization of cookiesRussell King - ARM Linux
Provide a common function to initialize a channels cookie values. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate tx_status functionsRussell King - ARM Linux
Now that we have the completed cookie in the dma_chan structure, we can consolidate the tx_status functions by providing a function to set the txstate structure and returning the DMA status. We also provide a separate helper to set the residue for cookies which are still in progress. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: provide a common function for completing a dma descriptorRussell King - ARM Linux
Provide a common function to do the cookie mechanics for completing a DMA descriptor. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate assignment of DMA cookiesRussell King - ARM Linux
Everyone deals with assigning DMA cookies in the same way (it's part of the API so they should be), so lets consolidate the common code into a helper function to avoid this duplication. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: add private header fileRussell King - ARM Linux
Add a local private header file to contain definitions and declarations which should only be used by DMA engine drivers. We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against multiple inclusion. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: move last completed cookie into generic dma_chan structureRussell King - ARM Linux
Every DMA engine implementation declares a last completed dma cookie in their private dma channel structures. This is pointless, and forces driver specific code. Move this out into the common dma_chan structure. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-08DMA: PL330: Support MEMTOMEM transmit w/o RMB, WMBBoojin Kim
The DMAC PL330 r1p0 version fixed the lockup error being on r0p0. This patch supports the DMA transmission without memory barrier operation when the revision of DMAC PL330 is the next of r0p0. Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-08DMA: PL330: Removes useless functionBoojin Kim
Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-08DMA: PL330: Merge PL330 driver into drivers/dma/Boojin Kim
Currently there were two part of DMAC PL330 driver for support old styled s3c-pl330 which has been merged into drivers/dma/pl330.c driver. Actually, there is no reason to separate them now. Basically this patch merges arch/arm/common/pl330.c into drivers/dma/pl330.c driver and removes useless exported symbol, externed function and so on. The newer pl330 driver tested on SMDKV310 and SMDK4212 boards Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31drivers/dma/pl330.c: add missing iounmapJulia Lawall
Add missing iounmap in error handling code, in a case where the function already preforms iounmap on some other execution path. This patch additionally adds calls to clk_disable and clk_put. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e; statement S,S1; int ret; @@ e = \(ioremap\|ioremap_nocache\)(...) ... when != iounmap(e) if (<+...e...+>) S ... when any when != iounmap(e) *if (...) { ... when != iounmap(e) return ...; } ... when any iounmap(e); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-17Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits) ARM: mach-shmobile: specify CHCLR registers on SH7372 dma: shdma: fix runtime PM: clear channel buffers on reset dma/imx-sdma: save irq flags when use spin_lock in sdma_tx_submit dmaengine/ste_dma40: clear LNK on channel startup dmaengine: intel_mid_dma: remove legacy pm interface ASoC: mxs: correct 'direction' of device_prep_dma_cyclic dmaengine: intel_mid_dma: error path fix dmaengine: intel_mid_dma: locking and freeing fixes mtd: gpmi-nand: move to dma_transfer_direction mtd: fix compile error for gpmi-nand mmc: mxs-mmc: fix the dma_transfer_direction migration dmaengine: add DMA_TRANS_NONE to dma_transfer_direction dma: mxs-dma: Don't use CLKGATE bits in CTRL0 to disable DMA channels dma: mxs-dma: make mxs_dma_prep_slave_sg() multi user safe dma: mxs-dma: Always leave mxs_dma_init() with the clock disabled. dma: mxs-dma: fix a typo in comment DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/remove video i.MX IPU: Fix display connections i.MX IPU DMA: Fix wrong burstsize settings dmaengine/ste_dma40: allow fixed physical channel ... Fix up conflicts in drivers/dma/{Kconfig,mxs-dma.c,pl330.c} The conflicts looked pretty trivial, but I'll ask people to verify them.
2012-01-09Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds
Device tree conversions for samsung and tegra Both platforms had some initial device tree support, but this adds much more to actually make it usable. * tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits) ARM: dts: Add intial dts file for EXYNOS4210 SoC, SMDKV310 and ORIGEN ARM: EXYNOS: Add Exynos4 device tree enabled board file rtc: rtc-s3c: Add device tree support input: samsung-keypad: Add device tree support ARM: S5PV210: Modify platform data for pl330 driver ARM: S5PC100: Modify platform data for pl330 driver ARM: S5P64x0: Modify platform data for pl330 driver ARM: EXYNOS: Add a alias for pdma clocks ARM: EXYNOS: Limit usage of pl330 device instance to non-dt build ARM: SAMSUNG: Add device tree support for pl330 dma engine wrappers DMA: PL330: Add device tree support ARM: EXYNOS: Modify platform data for pl330 driver DMA: PL330: Infer transfer direction from transfer request instead of platform data DMA: PL330: move filter function into driver serial: samsung: Fix build for non-Exynos4210 devices serial: samsung: add device tree support serial: samsung: merge probe() function from all SoC specific extensions serial: samsung: merge all SoC specific port reset functions ARM: SAMSUNG: register uart clocks to clock lookup list serial: samsung: remove all uses of get_clksrc and set_clksrc ... Fix up fairly trivial conflicts in arch/arm/mach-s3c2440/clock.c and drivers/tty/serial/Kconfig both due to just adding code close to changes.
2011-12-23DMA: PL330: Add device tree supportThomas Abraham
For PL330 dma controllers instantiated from device tree, the channel lookup is based on phandle of the dma controller and dma request id specified by the client node. During probe, the private data of each channel of the controller is set to point to the device node of the dma controller. The 'chan_id' of the each channel is used as the dma request id. Client driver requesting dma channels specify the phandle of the dma controller and the request id. The pl330 filter function converts the phandle to the device node pointer and matches that with channel's private data. If a match is found, the request id from the client node and the 'chan_id' of the channel is matched. A channel is found if both the values match. Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Reviewed-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-12-23DMA: PL330: Infer transfer direction from transfer request instead of ↵Thomas Abraham
platform data The transfer direction for a channel can be inferred from the transfer request and the need for specifying transfer direction in platfrom data can be eliminated. So the structure definition 'struct dma_pl330_peri' is no longer required. The channel's private data is set to point to a channel id specified in the platform data (instead of an instance of type 'struct dma_pl330_peri'). The filter function is correspondingly modified to match the channel id. With the 'struct dma_pl330_peri' removed from platform data, the dma controller transfer capabilities cannot be inferred any more. Hence, the dma controller capabilities is specified using platform data. Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-12-23DMA: PL330: move filter function into driverThomas Abraham
The dma channel selection filter function is moved from plat-samsung into the pl330 driver. In additon to that, a check is added in the filter function to ensure that the channel on which the filter has been invoked is pl330 channel instance (and avoid any incorrect access of chan->private in a system with multiple types of DMA drivers). Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-12-08DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/removeTushar Behera
amba_probe() now calls pm_runtime_get_noresume() and pm_runtime_enable() for the devices before the device probe is called. Hence we don't need to call pm_runtime_get_xxx and pm_runtime_enable() in device probe again. In the same way, since amba_remove() calls the respective pm_runtime functions, those functions need not be called from device remove. This patch fixes following run time error with pl330 driver. dma-pl330 dma-pl330.0: Unbalanced pm_runtime_enable! dma-pl330 dma-pl330.0: failed to get runtime pm Signed-off-by: Giridhar Maruthy <giridhar.maruthy@linaro.org> Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-11-22dmaengine: pl330: Enable module alias autogeneration for AMBA driversDave Martin
Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Vinod Koul <vinod.koul@intel.com>
2011-11-17Merge branch 'dma_slave_direction' into next_test_dirnVinod Koul
resolved conflicts: drivers/media/video/mx3_camera.c
2011-11-10DMA: PL330: Fix build warningBoojin Kim
This patch adds to fix the build warning as following. drivers/dma/pl330.c: In function 'pl330_probe': drivers/dma/pl330.c:859: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-10-27dmaengine: move drivers to dma_transfer_directionVinod Koul
fixup usage of dma direction by introducing dma_transfer_direction, this patch moves dma/drivers/* to use new enum Cc: Jassi Brar <jaswinder.singh@linaro.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Viresh Kumar <viresh.kumar@st.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Mika Westerberg <mika.westerberg@iki.fi> Cc: H Hartley Sweeten <hartleys@visionengravers.com> Cc: Li Yang <leoli@freescale.com> Cc: Zhang Wei <zw@zh-kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Shawn Guo <shawn.guo@freescale.com> Cc: Yong Wang <yong.y.wang@intel.com> Cc: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> Cc: Boojin Kim <boojin.kim@samsung.com> Cc: Barry Song <Baohua.Song@csr.com> Acked-by: Mika Westerberg <mika.westerberg@iki.fi> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-09-21Merge branch 'samsung_dma' into nextVinod Koul
2011-09-20dmaengine: delete redundant chan_id and chancnt initialization in dma driversBarry Song
dma_async_device_register will re-init chan_id and chancnt, so whatever chan_id and chancnt are set in drivers, they will be re-written by dma_async_device_register. Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Viresh Kumar <viresh.kumar@st.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Cc: Yong Wang <yong.y.wang@intel.com> Cc: Jaswinder Singh <jassi.brar@samsung.com> Cc: Pelagicore AB <info@pelagicore.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-09-14DMA: PL330: Add DMA_CYCLIC capabilityBoojin Kim
This patch adds DMA_CYCLIC capability that is used for audio driver. DMA driver activated with it reuses the dma requests that were submitted through tx_submit(). Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-09-14DMA: PL330: Remove the start operation for handling DMA_TERMINATE_ALL commandBoojin Kim
Original code carries out the start operation after flush operation. But start operation is not required for DMA_TERMINATE_ALL command. So, this patch removes the unnecessary start operation and only carries out the flush operation for handling DMA_TERMINATE_ALL command. Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> [Fixed typos in changelog] Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-09-14DMA: PL330: Support DMA_SLAVE_CONFIG commandBoojin Kim
Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-09-14DMA: PL330: Update PL330 DMA API driverBoojin Kim
This patch updates following 3 items. 1. Removes unneccessary code. 2. Add AMBA, PL330 configuration 3. Change the meaning of 'peri_id' variable from PL330 event number to specific dma id by user. Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-09-14DMA: PL330: Add support runtime PM for PL330 DMACBoojin Kim
Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-07-26dmaengine: pl330: make platform data optionalRob Herring
The pl330 needs platform data for describing peripheral connections, but some platforms may only support memory to memory dma channels. In this case, we can probe for how many channels there are and don't need the platform data. As memcpy requests don't need channel private data to hold peripheral info, allow private data to be NULL in this case. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Vinod Koul <vkoul@infradead.org> Cc: Dan Williams <dan.j.williams@intel.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-02-23ARM: amba: make probe() functions take const id tablesRussell King
Make Primecell driver probe functions take a const pointer to their ID tables. Drivers should never modify their ID tables in their probe handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-05-23DMA: PL330: Add dma api driverJassi Brar
Add DMA Engine API driver for the PL330 DMAC. This driver is supposed to be reusable by various platforms that have one or more PL330 DMACs. Atm, DMA_SLAVE and DMA_MEMCPY capabilities have been implemented. Signed-off-by: Jassi Brar <jassi.brar@samsung.com> Reviewed-by: Linus Walleij <linus.walleij@stericsson.com> [dan.j.williams@intel.com: missing slab.h and ->device_control() fixups] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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