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2012-01-06dma/imx-sdma: save irq flags when use spin_lock in sdma_tx_submitHaitao Zhang1-2/+3
mx53_loco: fix deadlock report from sdma_tx_submit() during boot BugLink: http://bugs.launchpad.net/bugs/878701 Adjust to use spin_lock_irqsave()/spin_unlock_irqresotre(), so to make it safe when called from interrupt context. Signed-off-by: Haitao Zhang <haitao.zhang@linaro.org> Signed-off-by: Eric Miao <eric.miao@linaro.org> Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-12-05IMX/SDMA : save the real count for one DMA transaction.Huang Shijie1-2/+9
When we use the SDMA in the UART driver(such as imx6q), we will meet one situation: Assume we set 64 bytes for the RX DMA buffer. The RX DMA buffer has received some data, but not full. An Aging DMA request will be received by the SDMA controller if we enable the IDDMAEN(UCR4[6]) in this case. So the UART driver needs to know the count of the real received bytes, and push them to upper layer. Add two new fields to sdmac, and update the `residue` in sdma_tx_status(). Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-11-22IMX/DMA : set the DMA direction in the sdma_control()Huang Shijie1-0/+1
Set the right DMA direction in the sdma_control(), else we will get the wrong log when enable the DYNAMIC_DEBUG. Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-11-17Merge branch 'dma_slave_direction' into next_test_dirnVinod Koul1-5/+5
resolved conflicts: drivers/media/video/mx3_camera.c
2011-11-06Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
2011-10-31drivers/dma: Add module.h to files implicitly using it.Paul Gortmaker1-0/+1
Fix files that were implicitly using module.h but not calling it out for inclusion directly. We'll break those once we remove the implicit presence otherwise [With input from Uwe Kleine-König <u.kleine-koenig@pengutronix.de>] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-27dmaengine: move drivers to dma_transfer_directionVinod Koul1-5/+5
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>
2011-09-21dmaengine i.MX DMA/SDMA: add missing include of linux/module.hAxel Lin1-0/+1
Add missing include of linux/module.h to fix build error. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-08-29dmaengine i.MX SDMA: use request_firmware_nowaitSascha Hauer1-7/+16
The firmware blob may not be available when the driver probes. Instead of blocking the whole kernel use request_firmware_nowait() and continue without firmware. The ROM scripts can already be used then if available. For the devicetree case the ROM scripts are not available, still the probe function should not block. The driver will be unusable in this case, but we have no way of detecting this properly. The configuration of the dma channels will fail, so nothing bad should happen. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-08-29dmaengine i.MX SDMA: set firmware scripts addresses to negative value initiallySascha Hauer1-0/+6
If we do not have a firmare script for a given transfer, the setup of this channel must fail. For this the script addresses have to be < 0 initially, not 0. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-08-29dmaengine i.MX SDMA: lock channel 0Sascha Hauer1-2/+16
channel0 of the sdma engine is the configuration channel. It is a shared resource and thus must be protected by a mutex. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-08-01Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds1-1/+3
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (37 commits) Improve slave/cyclic DMA engine documentation dmaengine: pl08x: handle the rest of enums in pl08x_width DMA: PL08x: cleanup selection of burst size DMA: PL08x: avoid recalculating cctl at each prepare DMA: PL08x: cleanup selection of buswidth DMA: PL08x: constify plchan->cd and plat->slave_channels DMA: PL08x: separately store source/destination cctl DMA: PL08x: separately store source/destination slave address DMA: PL08x: clean up LLI debugging DMA: PL08x: select LLI bus only once per LLI setup DMA: PL08x: remove unused constants ARM: mxs-dma: reset after disable channel dma: intel_mid_dma: remove redundant pci_set_drvdata calls dma: mxs-dma: fix unterminated platform_device_id table dmaengine: pl330: make platform data optional dmaengine: imx-sdma: return proper error if kzalloc fails pch_dma: Fix CTL register access issue dmaengine: mxs-dma: skip request_irq for NO_IRQ dmaengine/coh901318: fix slave submission semantics dmaengine/ste_dma40: allow memory buswidth/burst to be configured ... Fix trivial whitespace conflict in drivers/dma/mv_xor.c
2011-07-27dmaengine: imx-sdma: add device tree probe supportShawn Guo1-3/+39
It adds device tree probe support for imx-sdma driver. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Vinod Koul <vinod.koul@intel.com>
2011-07-27dmaengine: imx-sdma: sdma_get_firmware does not need to copy fw_nameShawn Guo1-10/+2
It does not need to allocate space and copy fw_name in function sdma_get_firmware(). Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Vinod Koul <vinod.koul@intel.com>
2011-07-27dmaengine: imx-sdma: use platform_device_id to identify sdma versionShawn Guo1-10/+30
It might be not good to use software defined version to identify sdma device type, when hardware does not define such version. Instead, soc name is stable enough to define the device type. The patch uses platform_device_id rather than version number passed by platform data to identify sdma device type/version. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Vinod Koul <vinod.koul@intel.com>
2011-07-25dmaengine: imx-sdma: return proper error if kzalloc failsAxel Lin1-1/+3
Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-07-07dmaengine: imx-sdma: pass sdma firmware name via platform dataShawn Guo1-3/+3
It is not good to have cpu_name and to_version encoded into sdma firmware name as variables. For example, there are three TOs of imx51 soc, the sdma script never changes since TO1, which means all three TOs of imx51 uses TO1 version of sdma script. But we have to prepare three identical firmwares, sdma-imx51-to1.bin sdma-imx51-to2.bin and sdma-imx51-to3.bin, to have the kernel capable of running on all three TOs. The patch removes cpu_name and to_version from sdma platform data, and instead uses fw_name to pass the firmware name, so that we can pass the TO version where it's relevant and skip it where only one firmware exists. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-02-14Merge branch 'imx' into dmaengine-fixesDan Williams1-35/+41
2011-01-31Merge branch 'dmaengine-shawn' into dmaengineSascha Hauer1-10/+6
2011-01-31dmaengine: imx-sdma: fix up param for the last BD in sdma_prep_slave_sg()Shawn Guo1-1/+4
As per the reference manual, bit "L" should be set while bit "C" should be cleared for the last buffer descriptor in the non-cyclic chain, so that sdma can stop trying to find the next BD and end the transfer. In case of sdma_prep_slave_sg(), BD_LAST needs to be set and BD_CONT be cleared for the last BD. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine: imx-sdma: correct sdmac->status in sdma_handle_channel_loop()Shawn Guo1-1/+1
sdma_handle_channel_loop() is the handler of cyclic tx. One period success does not really mean the success of the tx. Instead of DMA_SUCCESS, DMA_IN_PROGRESS should be the one to tell. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine: imx-sdma: return sdmac->status in sdma_tx_status()Shawn Guo1-3/+1
The sdmac->status was designed to reflect the status of the tx, so simply return it in sdma_tx_status(). Then dma client can call dma_async_is_tx_complete() to know the status of the tx. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine: imx-sdma: set sdmac->status to DMA_ERROR in err_out of ↵Shawn Guo1-0/+1
sdma_prep_slave_sg() sdma_prep_dma_cyclic() sets sdmac->status to DMA_ERROR in err_out, and sdma_prep_slave_sg() needs to do the same. Otherwise, sdmac->status stays at DMA_IN_PROGRESS, which will make the function return immediately next time it gets called. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine: imx-sdma: remove IMX_DMA_SG_LOOP handling in sdma_prep_slave_sg()Shawn Guo1-6/+0
This is a leftover from the time that the driver did not have sdma_prep_dma_cyclic callback and implemented sound dma as a looped sg chain. And it can be removed now. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine i.MX SDMA: reserve channel 0 by not registering itSascha Hauer1-18/+12
We need channel 0 of the sdma engine for internal purposes. We accomplished this by calling dma_request_channel() in the probe function. This does not work when multiple dma engines are present which is the case when IPU support for i.MX31/35 is compiled in. So instead of registering channel 0 and reserving it afterwards simply do not register it in the first place. With this the dmaengine channel counting does not match sdma channel counting anymore, so we have to use sdma channel counting in the driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine i.MX SDMA: initialize dma capabilities outside channel loopSascha Hauer1-3/+3
The capabilities are device specific fields, not channel specific fields. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine i.MX SDMA: do not initialize chan_id fieldSascha Hauer1-1/+0
This is bogus as the dmaengine core will overwrite this field. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine i.MX sdma: check sg entries for valid addresses and lengthsSascha Hauer1-3/+17
This patch lets sdma_prep_slave_sg fail if the entries of an sg list do not start on multiples of the word size or if the lengths are not multiple of the word size. Also, catch the previously unhandled DMA_SLAVE_BUSWIDTH_8_BYTES and DMA_SLAVE_BUSWIDTH_UNDEFINED cases. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-31dmaengine i.MX sdma: set maximum segment size for our deviceSascha Hauer1-0/+3
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-29dmaengine: imx-sdma: fix inconsistent naming in sdma_assign_cookie()Shawn Guo1-4/+4
Variable name sdma and sdmac are consistently used as the pointer to sdma_engine and sdma_channel respectively throughout the file. The patch fixes the inconsistency seen in function sdma_assign_cookie(). Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-29dmaengine: imx-sdma: propagate error in sdma_probe() instead of returning 0Shawn Guo1-1/+1
Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-29dmaengine i.MX SDMA: Fix firmware loadingSascha Hauer1-1/+1
When loading the microcode to the SDMA engine we have to use the ram_code_start_addr found in the firmware image. The copy in the sdma engine is not initialized correctly. This is broken since: 5b28aa3 dmaengine i.MX SDMA: Allow to run without firmware Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-05Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into ↵Russell King1-96/+78
devel-stable
2010-12-07dmaengine i.MX SDMA: initialize on module_initSascha Hauer1-1/+1
The firmware framework gets initialized during fs_initcall time, so we are not allowed to call request_firmware earlier. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-04dmaengine: imx-sdma: fix bug in buffer descriptor initializationAnatolij Gustschin1-1/+1
Currently while submitting scatterlists with more than one SG entry the DMA buffer address from the first SG entry is inserted into all initialized DMA buffer descriptors. This is due to the typo in the for_each_sg() loop where the scatterlist pointer is used for obtaining the DMA buffer address and _not_ the SG list iterator. As a result all received data will be written only into the first DMA buffer while reading. While writing the data from the first DMA buffer is send to the device multiple times. This caused the filesystem destruction on the MMC card when using DMA in mxcmmc driver. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-03dmaengine i.MX SDMA: Allow to run without firmwareSascha Hauer1-96/+78
The SDMA firmware consists of a ROM part and a RAM part. The ROM part is always present in the SDMA engine and is sufficient for many cases. This patch allows to pass in platform data containing the script addresses in ROM, so loading a firmware is optional now. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Dan Williams <dan.j.williams@intel.com>
2010-10-05dmaengine: Add Freescale i.MX SDMA supportSascha Hauer1-0/+1392
This patch adds support for the Freescale i.MX SDMA engine. The SDMA engine is a scatter/gather DMA engine which is implemented as a seperate coprocessor. SDMA needs its own firmware which is requested using the standard request_firmware mechanism. The firmware has different entry points for each peripheral type, so drivers have to pass the peripheral type to the DMA engine which in turn picks the correct firmware entry point from a table contained in the firmware image itself. The original Freescale code also supports support for transfering data to the internal SRAM which needs different entry points to the firmware. Support for this is currently not implemented. Also, support for the ASRC (asymmetric sample rate converter) is skipped. I took a very simple approach to implement dmaengine support. Only a single descriptor is statically assigned to a each channel. This means that transfers can't be queued up but only a single transfer is in progress. This simplifies implementation a lot and is sufficient for the usual device/memory transfers. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Linus Walleij <linus.ml.walleij@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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