- 30 3月, 2013 1 次提交
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由 Andy Shevchenko 提交于
On some hardware configurations we have got the request line with the offset. The patch introduces convert_slave_id() helper for that cases. The request line base is came from the driver data provided by the platform_device_id table. Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 28 2月, 2013 1 次提交
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由 Arnd Bergmann 提交于
The original device tree binding for this driver, from Viresh Kumar unfortunately conflicted with the generic DMA binding, and did not allow to completely seperate slave device configuration from the controller. This is an attempt to replace it with an implementation of the generic binding, but it is currently completely untested, because I do not have any hardware with this particular controller. The patch applies on top of the slave-dma tree, which contains both the base support for the generic DMA binding, as well as the earlier attempt from Viresh. Both of these are currently not merged upstream however. This version incorporates feedback from Viresh Kumar, Andy Shevchenko and Russell King. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Vinod Koul <vinod.koul@linux.intel.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 28 1月, 2013 3 次提交
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由 Andy Shevchenko 提交于
Currently the driver returns full length of the active descriptor which is wrong. We have to go throught the active descriptor and substract the length of each sent children in the chain from the total length along with the actual data in the DMA channel registers. The cyclic case is not handled by this patch due to len field in the descriptor structure is left untouched by the original code. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
By this new field we distinguish a total length of the chain and the individual length of each descriptor in the chain. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
The soft LLP mode is working for active descriptor only. So, we do not need to have a copy of its pointer. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 21 1月, 2013 1 次提交
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由 Andy Shevchenko 提交于
Currently descriptors are allocated from normal cacheable memory and that slows down filling the descriptors, as we need to call cache_coherency routines afterwards. It would be better to allocate memory for these descriptors from DMA_COHERENT memory. This would make code much cleaner too. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 12 1月, 2013 2 次提交
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由 Andy Shevchenko 提交于
The same information could be extracted from the struct dma_chan. The patch introduces helper function dwc_get_data_width() as well. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
Currently the direction value comes from the generic slave configuration structure and explicitly as a preparation function parameter. The first one is kinda obsoleted. Thus, we have to store the value passed to the preparation function somewhere in our structures to be able to use it later. The best candidate to provide the storage is a custom channel structure. Until now we still keep and check the direction field of the slave config structure as well. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 08 1月, 2013 2 次提交
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由 Andy Shevchenko 提交于
The to_dw_desc() macro helps to retrieve the dw_desc node from the corresponding list_head structure. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Reviewed-by: NFelipe Balbi <balbi@ti.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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由 Viresh Kumar 提交于
dw_dmac driver already supports device tree but it used to have its platform data passed the non-DT way. This patch does following changes: - pass platform data via DT, non-DT way still takes precedence if both are used. - create generic filter routine - Earlier slave information was made available by slave specific filter routines in chan->private field. Now, this information would be passed from within dmac DT node. Slave drivers would now be required to pass bus_id (a string) as parameter to this generic filter(), which would be compared against the slave data passed from DT, by the generic filter routine. - Update binding document Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org> Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> [Fixed __devinit usage] Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 26 10月, 2012 1 次提交
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由 Hein Tibosch 提交于
The dw_dmac driver was originally developed for avr32 to be used with the Synopsys DesignWare AHB DMA controller. Starting from 2.6.38, access to the device's i/o memory was done with the little-endian readl/writel functions(1) This broke the driver for the avr32 platform, because it needs big (native) endian accessors. This patch makes the endianness configurable using 'DW_DMAC_BIG_ENDIAN_IO', which will default be true for AVR32 I submitted this patch before(2) but then waited for Andy to finish other changes to the same module(3). (1) https://patchwork.kernel.org/patch/608211 (2) https://lkml.org/lkml/2012/8/26/148 (3) https://lkml.org/lkml/2012/9/21/173Signed-off-by: NHein Tibosch <hein_tibosch@yahoo.es> Acked-by: NArnd Bergmann <arnd@arndb.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Ludovic Desroches <ludovic.desroches@atmel.com> Cc: Havard Skinnemoen <havard@skinnemoen.net> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 9月, 2012 4 次提交
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由 Andy Shevchenko 提交于
Some controllers have the reduced functionality where the LLP multi block transfers are not supported. This patch introduces a support of such controllers. In case of memory copy or scatter-gather lists it emulates LLP transfers via bunch of the regular single block ones. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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由 Andy Shevchenko 提交于
Not all of the controllers support the 64 bit data width. Make it configurable via platform data. The driver will try to get a value from the component parameters, otherwise it will use the platform data. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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由 Andy Shevchenko 提交于
The maximum block size is a configurable parameter for the chip. So, driver will try to get it from the encoded component parameters. Otherwise it will come from the platform data. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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由 Andy Shevchenko 提交于
There is a block of the registers that are optional. However, if enabled they contain useful information about the controller hardware configuration. We will use this piece of data to autoconfigure the driver. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 26 7月, 2012 1 次提交
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由 Andy Shevchenko 提交于
Use devm_kzalloc, devm_clk_get, devm_request_irq, and devm_request_and_ioremap to reduce the code and to simplify the error path. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Viresh Kumar <viresh.linux@gmail.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 16 7月, 2012 1 次提交
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由 Andy Shevchenko 提交于
Use 'u32' for the LLI structure members, which are defined by hardware to be 32-bit. dma_addr_t is much more vague about its actual size. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 21 6月, 2012 1 次提交
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由 Andy Shevchenko 提交于
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.linux@gmail.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 13 3月, 2012 1 次提交
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由 Russell King - ARM Linux 提交于
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: NRussell King <rmk+kernel@arm.linux.org.uk> Tested-by: NLinus Walleij <linus.walleij@linaro.org> Reviewed-by: NLinus Walleij <linus.walleij@linaro.org> Acked-by: NJassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: NShawn Guo <shawn.guo@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 22 2月, 2012 2 次提交
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由 Viresh Kumar 提交于
Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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由 Viresh Kumar 提交于
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: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 28 11月, 2011 1 次提交
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由 Viresh Kumar 提交于
In S2R all DMA registers are reset by hardware and thus they are required to be reprogrammed. The channels which aren't reprogrammed are channel configuration and interrupt enable registers, which are currently programmed at chan_alloc time. This patch creates another routine to initialize a channel. It will try to initialize channel on every dwc_dostart() call. If channel is already initialised then it simply returns, otherwise it configures registers. This routine will also initialize registers on wakeup from S2R, as we mark channels as uninitialized on suspend. Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 25 5月, 2011 1 次提交
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由 Viresh Kumar 提交于
Nobody is currently maintaining dw_dmac. We are using dw_dmac for SPEAr13xx and are currently maintaining it. After discussing with Vinod, sending this patch to update maintainer-ship of dw_dmac. Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Acked-by: NHavard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 13 5月, 2011 1 次提交
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由 Linus Walleij 提交于
Some peripherals like amba-pl011 needs pause to be implemented in DMA controller drivers. This also returns correct status from dwc_tx_status() in case chan is paused. Signed-off-by: NLinus Walleij <linus.walleij@linaro.org> Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 07 3月, 2011 3 次提交
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由 Viresh Kumar 提交于
On ARMv7 cores, device memory mapped as Normal Non-cacheable, may not guarantee ordered access causing failures in device drivers that do not use the mandatory memory barriers. readl & writel versions contain necessary memory barriers for this. commit 79f64dbf: "ARM: 6273/1: Add barriers to the I/O accessors if ARM_DMA_MEM_BUFFERABLE" can be referred for more information on this. Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Viresh KUMAR 提交于
Msize or Burst Size is peripheral dependent in case of prep_slave_sg and cyclic_prep transfers, and in case of memcpy transfers it is platform dependent. So msize configuration must come from platform data. Also some peripherals (ex: JPEG), need to be flow controller for dma transfers, so this information in case of slave_sg & cyclic_prep transfers must come from platform data. Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Viresh Kumar 提交于
In Synopsys designware, channel priority is programmable. This patch adds support for passing channel priority through platform data. By default Ascending channel priority will be followed, i.e. channel 0 will get highest priority and channel 7 will get lowest. Signed-off-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 09 9月, 2009 1 次提交
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由 Dan Williams 提交于
Drop dw_dmac's use of tx_list from struct dma_async_tx_descriptor in preparation for removal of this field. Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 02 4月, 2009 1 次提交
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由 Hans-Christian Egtvedt 提交于
This patch adds a cyclic DMA interface to the DW DMA driver. This is very useful if you want to use the DMA controller in combination with a sound device which uses cyclic buffers. Using a DMA channel for cyclic DMA will disable the possibility to use it as a normal DMA engine until the user calls the cyclic free function on the DMA channel. Also a cyclic DMA list can not be prepared if the channel is already active. Signed-off-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Acked-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 19 2月, 2009 1 次提交
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由 Dan Williams 提交于
The conversion of atmel-mci to dma_request_channel missed the initialization of the channel dma_slave information. The filter_fn passed to dma_request_channel is responsible for initializing the channel's private data. This implementation has the additional benefit of enabling a generic client-channel data passing mechanism. Reviewed-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NDan Williams <dan.j.williams@intel.com> Acked-by: NHaavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 09 7月, 2008 1 次提交
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由 Haavard Skinnemoen 提交于
This adds a driver for the Synopsys DesignWare DMA controller (aka DMACA on AVR32 systems.) This DMA controller can be found integrated on the AT32AP7000 chip and is primarily meant for peripheral DMA transfer, but can also be used for memory-to-memory transfers. This patch is based on a driver from David Brownell which was based on an older version of the DMA Engine framework. It also implements the proposed extensions to the DMA Engine API for slave DMA operations. The dmatest client shows no problems, but there may still be room for improvement performance-wise. DMA slave transfer performance is definitely "good enough"; reading 100 MiB from an SD card running at ~20 MHz yields ~7.2 MiB/s average transfer rate. Full documentation for this controller can be found in the Synopsys DW AHB DMAC Databook: http://www.synopsys.com/designware/docs/iip/DW_ahb_dmac/latest/doc/dw_ahb_dmac_db.pdf The controller has lots of implementation options, so it's usually a good idea to check the data sheet of the chip it's intergrated on as well. The AT32AP7000 data sheet can be found here: http://www.atmel.com/dyn/products/datasheets.asp?family_id=682 Changes since v4: * Use client_count instead of dma_chan_is_in_use() * Add missing include * Unmap buffers unless client told us not to Changes since v3: * Update to latest DMA engine and DMA slave APIs * Embed the hw descriptor into the sw descriptor * Clean up and update MODULE_DESCRIPTION, copyright date, etc. Changes since v2: * Dequeue all pending transfers in terminate_all() * Rename dw_dmac.h -> dw_dmac_regs.h * Define and use controller-specific dma_slave data * Fix up a few outdated comments * Define hardware registers as structs (doesn't generate better code, unfortunately, but it looks nicer.) * Get number of channels from platform_data instead of hardcoding it based on CONFIG_WHATEVER_CPU. * Give slave clients exclusive access to the channel Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>, Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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