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2012-03-26dmaengine: imx-dma: merge old dma-v1.c with imx-dma.cJavier Martin2-53/+552
It is mainly a simple merge changing the prefix of some functions to fit the imx-dma namings. As there are no users of the old dma-v1.c api we can safely remove this file. Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-21dmaengine: at_hdmac: add slave config operationNicolas Ferre2-13/+75
This patch introduces DMA_SLAVE_CONFIG to at_hdmac Atmel DMA driver. It is needed to fix a regression in the use of atmel-mci.c driver on Atmel AT91 platforms brouth by e2b35f3: "dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes" We remove some parts of the private structure "at_dma_slave" and use the information provided by "struct dma_slave_config": source/destination peripheral registers and access width. AT_DMA_SLAVE_WIDTH_* values used previously are not needed anymore as we now use the standard ones. Although some conversion functions are needed to match register expected values. Some AT91 sub-architecture specific files are slightly touched by this patch but it cannot be split because it can break compilation. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-21dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclicAlexandre Bounine18-25/+42
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>
2012-03-21dmaengine/dma_slave: introduce inline wrappersAlexandre Bounine20-49/+42
Add inline wrappers for device_prep_slave_sg() and device_prep_dma_cyclic() interfaces to hide new parameter from current users of affected interfaces. Convert current users to use new wrappers instead of direct calls. Suggested by Russell King [https://lkml.org/lkml/2012/2/3/269]. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-21dma: imx-sdma: Treat firmware messages as warnings instead of errosFabio Estevam1-3/+3
As the SDMA controller can operate without an external firmware being loaded, treat the firmware related messages as warnings rather than errors. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13Merge branch 'rmk_cookie_fixes2' into nextVinod Koul35-634/+296
Conflicts: drivers/dma/imx-dma.c drivers/dma/pl330.c Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: fix for cookie changes and mergeVinod Koul6-5/+7
Fixed trivial issues in drivers: drivers/dma/imx-sdma.c drivers/dma/intel_mid_dma.c drivers/dma/ioat/dma_v3.c drivers/dma/iop-adma.c drivers/dma/sirf-dma.c drivers/dma/timb_dma.c Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: pl330: fix the pl330 build after cookie cleanupVinod Koul1-1/+0
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: ensure all DMA engine drivers initialize their cookiesRussell King - ARM Linux9-0/+9
Ensure all DMA engine drivers initialize their cookies in the same way, so that they all behave in a similar fashion. This means their first issued cookie will be 2 rather than 1, and will increment to INT_MAX before returning 1 and starting over. In connection with this, Dan Williams said: > Russell King wrote: > > Secondly, some DMA engine drivers initialize the dma_chan cookie to 0, > > others to 1.  Is there a reason for this, or are these all buggy? > > I know that ioat and iop-adma expect 0 to mean "I have cleaned up this > descriptor and it is idle", and would break if zero was an in-flight > cookie value. The reserved usage of zero is an driver internal > concern, but I have no problem formalizing it as a reserved value. 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: fix cookie handling in iop-adma.c and ppc4xx/adma.cRussell King - ARM Linux2-15/+3
Dan Williams said: > > Russell King wrote: > > Firstly, we have DMA_MIN_COOKIE which has value 1 - so any cookies below > > that aren't valid.  That seems sane. > > > > We seem to have different behaviours: > > > > -       cookie = c->cookie; > > -       cookie++; > > -       if (cookie < 0) > > -               cookie = 1; > > -       c->cookie = cookie; > > -       tx->cookie = cookie; > > > > c->cookie here is initialized to zero, so the first cookie given out will > > be 1.  This is how most DMA engine drivers implement this. > > > > Then we have this: > > > >                cookie = chan->common.cookie; > >                cookie++; > >                if (cookie <= 1) > >                        cookie = 2; > > > >                /* initialize the completed cookie to be less than > >                 * the most recently used cookie > >                 */ > >                chan->common.completed_cookie = cookie - 1; > >                chan->common.cookie = sw_desc->async_tx.cookie = cookie; > > > > Again, chan->common.cookie starts off at 0.  The first cookie given out > > will be 2, and 1 will never be used.  There are three drivers which > > implement it this way. > > > > Why is there this difference, and can these three be corrected to behave > > the same way as the first (and therefore the assignment of cookies > > consolidated?) > > Yes, they should be consolidated, and I believe they have drifted only > because there were no good common helpers and murphy's law took over. So lets fix this up to use the common dma_cookie_assign() helper. 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 initialization of cookiesRussell King - ARM Linux15-28/+31
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 Linux23-235/+93
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 Linux19-21/+36
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 Linux25-272/+52
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 Linux24-0/+49
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 Linux34-115/+81
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>
2012-03-13dmaengine: mv_xor: remove write-only is_complete_cookieRussell King - ARM Linux2-2/+0
mv_xor's is_complete_cookie is only ever written to, but never read. This is silly, remove the write-only structure member. 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>
2012-03-09Revert "drivers/dma: linux/module.h included twice"Vinod Koul2-0/+2
This reverts commit 865d9438eb1f7670d2e88849f059db551b320887. The module.h incsuion twice has been updated tree wide hence this is not required to be merged. Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-08DMA: PL330: Support MEMTOMEM transmit w/o RMB, WMBBoojin Kim1-5/+26
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 Kim1-46/+0
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 Kim2-2/+2113
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>
2012-03-06dma: imx-sdma: Print a message when firmare fails to be requestedFabio Estevam1-2/+4
Print a message when firmare fails to be requested in the case of platform data being used. While at it, distinguish between the error messages of the device tree and platform data cases. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06dma: imx-sdma: Let the driver be probed even if no firware is foundFabio Estevam1-8/+5
On the device tree case the code bails out when the firmware name cannot be found or if the firmware fails to be requested. Fix this behaviour as the SDMA engine can still operate with the built-in ROM scripts. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06dmaengine: Add support for multiple descriptors for imx-dma.Javier Martin1-74/+258
dmaengine specifies the possibility that several descriptors can be queued for transfer. It also indicates that tasklets must be used for DMA callbacks. Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06dmaengine: Add support for MEMCPY for imx-dma.Javier Martin1-1/+35
MEMCPY transfers allow DMA copies from memory to memory. This patch has been tested with dmatest device driver. Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06dma: dmaengine: Distinguish between 'dmaengine: failed to get' messagesFabio Estevam1-4/+4
The message "dmaengine: failed to get" can come from two possible locations within dmaengine.c. In order to distinguish between them, replace "dmaengine" with __func__ string so that the source function of the error message can be easily identified. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06drivers/dma: linux/module.h included twiceDanny Kukawka2-2/+0
drivers/dma/imx-dma.c and drivers/dma/imx-sdma.c included 'linux/module.h' twice, remove the duplicates. Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Remove unused fields in struct dw_dma_slaveViresh Kumar1-0/+12
Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changesViresh Kumar1-8/+16
There are few existing user drivers of dw_dmac. They will break as soon as we remove unused fields from struct dw_dma_slave. This patch focuses to fix these user drivers to use dma_slave_config() routine. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Add support for DMA_SLAVE_CONFIGViresh Kumar2-29/+93
This patch adds support for DMA_SLAVE_CONFIG in dwc DMAC controller. Fields in struct dw_dma_slave for passing similar data are preserved in this patch untill all existing users are fixed. That will be handled later in this patchset. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Add 64 bit access width support for slave xfers on mem sideViresh Kumar1-4/+16
64 bit transfers are possible on both sides in slave transfers (memory as well as peripherals). This patch adds support for it memory side 64 bit transfers. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Don't handle block interruptsViresh Kumar1-30/+6
Block interrupts give interrupt on completion of every LLI, which is actually too much interrupts. This is just not required for current functioning of dw_dmac. So, just don't handle them at all. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Use dev_get_platdata() instead of accessing dev directlyViresh Kumar1-1/+1
Use already defined function dev_get_platdata() instead of accessing pdev->dev.data. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Don't use magic number for total number of channelsViresh Kumar1-1/+1
Total number of channels is passed in pdata->nr_channels variable, thus we must not use magic number '7' for total number of channels. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/amba-pl08x: Take flow controller info from DMA_SLAVE_CONFIGViresh Kumar1-1/+3
Flow controller information is passed now from DMA_SLAVE_CONFIG option. This patch makes changes in pl08x driver to use device_fc from it instead of platform data. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine: Pass dma_slave_config .device_fc = NULL for all existing usersViresh Kumar6-0/+13
.device_fc is added in struct dma_slave_config recently. All user drivers, which want DMA to be the flow controller must pass this field as false. As earlier driver don't look to use this feature, mark it false for now. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine/dw_dmac: Hibernation support in dw_dmacRajeev KUMAR1-0/+4
The suspend and resume implementation is through dev_pm_ops in dmac. So in order to support hibernation, freeze, thaw, restore and poweroff features are required. Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com> Acked-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine: intel_mid_dma: move pm_runtime_putAdrian Hunter1-1/+1
Move pm_runtime_put() to the end of intel_mid_dma_free_chan_resources() because there is no sense in allowing runtime suspend while the driver is still accessing the device. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22dmaengine: intel_mid_dma: fix error status maskAdrian Hunter1-1/+2
The error status mask (MASK_ERR) has the same format as the other masks (MASK_TFR, MASK_BLOCK etc) and must be cleared the same way. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-02i.MX SDMA: Fix burstsize settingsPhilippe Rétornaz1-2/+4
Commit 6584cb88 (ARM i.MX dma: Fix burstsize settings) fixed the mxcmmc driver but forgot to fix the SDMA driver to handle the correct burtsize. This make the SD card access works again with DMA on i.MX31 boards. Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch> Tested-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-01Merge branch 'fixes' into nextVinod Koul1-1/+2
2012-02-01dma: sh_dma: not all SH DMAC implementations support MEMCPYGuennadi Liakhovetski1-1/+2
Add a flag to allow platforms to specify, whether a DMAC instance supports the MEMCPY operation. To avoid regressions, preserve the current default. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31Merge branch 'fixes' into nextVinod Koul3-12/+11
2012-01-31Merge branch fixes of ↵Vinod Koul1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine.git
2012-01-31at_hdmac: bugfix for enabling channel irqNikolaus Voss2-11/+10
commit 463894705e4089d0ff69e7d877312d496ac70e5b deleted redundant chan_id and chancnt initialization in dma drivers as this is done in dma_async_device_register(). However, atc_enable_irq() relied on chan_id set before registering the device, what left only channel 0 functional for this driver. This patch introduces atc_enable/disable_chan_irq() as a variant of atc_enable/disable_irq() with the channel as explicit argument. Signed-off-by: Nikolaus Voss <n.voss@weinmann.de> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31dma/imx-sdma: convernt to use bit opsRichard Zhao1-34/+34
We don't need extra lock, so we use non-atomic bit ops to set/clear bits, merge event_mask0 and event_mask1 into an array, it helps use bit ops. It also fixs the issue: sdmac->event_mask0 = 1 << sdmac->event_id0; sdmac->event_mask1 = 1 << (sdmac->event_id0 - 32); It event_id0 < 32, it shifts negative number. If event_id0 >= 32, it shifts number >= sizeof(int). Both the cases behavior is undefined. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31dma/imx-sdma: use num_events to validate event_id0Richard Zhao1-1/+1
event number is not always 32. use num_events for checking instead. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31dma/imx-sdma: move clk_enable out of sdma_request_channelRichard Zhao1-2/+3
It makes clk_enable/disable pair more readable, and fix one bug: sdma_init calls sdma_request_channel, but seems don't know sdma_request_channel enabled the clock. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> [fixed typo in commit log] Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31dma/imx-sdma: call sdma_set_channel_priority after sdma_request_channelRichard Zhao1-2/+2
sdma_request_channel sets the default priority. sdma_alloc_chan_resources should call sdma_set_channel_priority thereafter to over write it. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-01-31dma/imx-sdma: use readl_relaxed/writel_relaxed and use writel when necessaryRichard Zhao1-22/+22
use readl_relaxed/writel_relaxed in most places, and use writel when enable channel, because it needs memory barrier. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-23 04:34:30 +0300