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path: root/drivers/dma/dw_dmac.c
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* dw_dmac: add ACPI supportAndy Shevchenko2013-04-15
| | | | | | | | | Since we have proper ACPI DMA helpers implemented, the driver may use it. This patch introduces custom filter function together with acpi_device_id table. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dw_dmac: remove unnecessary ENODEV checkAndy Shevchenko2013-04-15
| | | | | | | | | If CONFIG_OF is not set the of_node of the device will always be NULL. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: dw_dmac: simplify master selectionArnd Bergmann2013-04-15
| | | | | | | | | | | | | | | | | | | The patch to add the common DMA binding added a dummy dw_dma_slave structure into the dw_dma_chan structure in order to configure the masters correctly. It turns out that this can be simplified if we pick the DMA masters in the dwc_alloc_chan_resources function instead and save them in the dw_dma_chan structure directly. This could be simplified further once all users that today use dw_dma_slave for configuration get converted to device tree based setup instead. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dw_dmac: rename DT related methods to reflect their belongingAndy Shevchenko2013-04-15
| | | | | | | | | | | | | | | | | | Since we will have not only DT cases in future let's rename DT related methods to reflect their belonging. The rename was done as follows: struct dw_dma_filter_args -> struct dw_dma_of_filter_args dw_dma_generic_filter() -> dw_dma_of_filter() dw_dma_xlate() -> dw_dma_of_xlate() dw_dma_id_table -> dw_dma_of_id_table There is no functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dw_dmac: fix style of the commentsAndy Shevchenko2013-04-15
| | | | | | | | | | Let's use capital letter as a first one in the comments. There is no functional changes. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dw_dmac: don't wait for FIFO_EMPTY endlessly in dwc_chan_pauseAndy Shevchenko2013-04-15
| | | | | | | | | | | | | | | | | | | | | | | | | | When we pause the channel after transfer is completed we might stuck in the dwc_chan_pause() because the FIFO_EMPTY flag will never be asserted. To avoid the endless loop we introduce a timeout here (*). The proper solution is to somehow get the residue in FIFO and avoid busyloop when transfer is done, but this task is not simple and fast. Unfortunately we can't use cpu_relax() in conjunction with jiffies checker, due to we have interrupts disabled by spin_lock_irqsave() and there is a big chance that no interrupts will come to update the jiffies.. (*) The worst case is AHB write * FIFO size / hclk = 5.12 us, where AHB write = 2 cycles, hclk = 100 MHz, burst size = 1 byte, FIFO size = 256 bytes. The proposed 40us timeout might be considered as a big one, though we enter to that state only when we have the transfer already completed. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dw_dmac: adjust slave_id accordingly to request line baseAndy Shevchenko2013-03-29
| | | | | | | | | | | | 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: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: dw_dma: fix endianess for DT xlate functionArnd Bergmann2013-03-29
| | | | | | | | | | | | | As reported by Wu Fengguang's build robot tracking sparse warnings, the dma_spec arguments in the dw_dma_xlate are already byte swapped on little-endian platforms and must not get swapped again. This code is currently not used anywhere, but will be used in Linux 3.10 when the ARM SPEAr platform starts using the generic DMA DT binding. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2013-03-03
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | Pull second set of slave-dmaengine updates from Vinod Koul: "Arnd's patch moves the dw_dmac to use generic DMA binding. I agreed to merge this late as it will avoid the conflicts between trees. The second patch from Matt adding a dma_request_slave_channel_compat API was supposed to be picked up, but somehow never got picked up. Some patches dependent on this are already in -next :(" * 'next' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: dw_dmac: move to generic DMA binding dmaengine: add dma_request_slave_channel_compat()
| * dmaengine: dw_dmac: move to generic DMA bindingArnd Bergmann2013-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Arnd Bergmann <arnd@arndb.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Andy 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: Vinod Koul <vinod.koul@intel.com>
* | Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2013-02-26
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * dw_dmac: apply default dma_mask if neededAndy Shevchenko2013-02-14
| | | | | | | | | | | | | | | | | | In some cases we got the device without dma_mask configured. We have to apply the default value to avoid crashes during memory mapping. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: add support for Lynxpoint DMA controllersMika Westerberg2013-02-12
| | | | | | | | | | | | | | | | | | | | | | Intel Lynxpoint PCH Low Power Subsystem has DMA controller to support general purpose serial buses like SPI, I2C, and HSUART. This controller is enumerated from ACPI namespace with ACPI ID INTL9C60. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: return proper residue valueAndy Shevchenko2013-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: fill individual length of descriptorAndy Shevchenko2013-01-28
| | | | | | | | | | | | | | | | | | It will be useful to have the length of the transfer in the descriptor. The cyclic transfer functions remained untouched. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: introduce total_len field in struct dw_descAndy Shevchenko2013-01-28
| | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: remove unnecessary tx_list field in dw_dma_chanAndy Shevchenko2013-01-28
| | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: print out DW_PARAMS and DWC_PARAMS when debugAndy Shevchenko2013-01-28
| | | | | | | | | | | | | | | | | | It's usefull to have the values of the DW_PARAMS and DWC_PARAMS printed when debug mode is enabled. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: move soft LLP code from tasklet to dwc_scan_descriptorsAndy Shevchenko2013-01-20
| | | | | | | | | | | | | | | | | | | | The proper place for the main logic of the soft LLP mode is dwc_scan_descriptors. It prevents to get the transfer unexpectedly aborted in case the user calls dwc_tx_status. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: don't exceed AHB master number in dwc_get_data_widthAndy Shevchenko2013-01-20
| | | | | | | | | | | | | | | | | | | | | | The driver assumes that hardware has two AHB masters which might not be always true. In such cases we must not exceed number of the AHB masters present in the hardware. In the proposed scheme in this patch, we would choose the master with highest possible number whenever we exceed max AHB masters. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: allocate dma descriptors from DMA_COHERENT memoryAndy Shevchenko2013-01-20
| | | | | | | | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: dw_dmac: clear suspend bit during terminationHeikki Krogerus2013-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The DMA transfer could not be established if previously it was paused and terminated. In that case the channel's suspend bit remains set that prevents to transfer anything until channel is resumed. The patch adds the dwc_chan_resume() call instead of a plain flag assignment. That clears the DWC_CFGL_CH_SUSP bit as well during termination. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: backlink to dw_dma in dw_dma_chan is superfluousAndy Shevchenko2013-01-12
| | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: make usage of dw_dma_slave optionalAndy Shevchenko2013-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | The driver requires a custom slave configuration to be present to be able to make the slave transfers. Nevertheless, in some cases we need only the request line as an additional information to the generic slave configuration. The request line is provided by slave_id parameter of the dma_slave_config structure. That's why the custom slave configuration could be optional for such cases. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: store direction in the custom channel structureAndy Shevchenko2013-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: call .probe after we have a device in placeAndy Shevchenko2013-01-12
| | | | | | | | | | | | | | | | | | | | | | | | If we don't yet have the platform device for the driver when it is being loaded we fail to probe the driver. So instead of calling probe() directly we call platform_driver_register(). It will call the probe() immediately if we have the device but also makes the driver to work on platforms where the platform device is created later. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: dw_dmac: check direction properly in dw_dma_cyclic_prepAndy Shevchenko2013-01-12
| | | | | | | | | | | | | | | | | | | | dma_transfer_direction is a normal enum. It means we can't usually use the values as bit fields. Let's adjust this check and move it above the usage of the direction parameter, due to the nature of the following usage of it. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: dw_dmac: add dwc_chan_pause and dwc_chan_resumeAndy Shevchenko2013-01-09
| | | | | | | | | | | | | | | | We will use at least the dwc_chan_resume() later. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: update tx_node_active in dwc_do_single_blockAndy Shevchenko2013-01-09
| | | | | | | | | | | | | | | | | | The "else" keyword in the dw_dma_tasklet is removed as well. All together simplifies the logic of the code and understanding of what is happening there. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: remove redundant checkAndy Shevchenko2013-01-09
| | | | | | | | | | | | | | | | | | There is no need to check the callback_required parameter, due to we check the callback pointer to be a non-NULL. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: check for mapping errorsAndy Shevchenko2013-01-09
| | | | | | | | | | | | | | | | | | | | | | Otherwise we get a warning in case of CONFIG_DMA_API_DEBUG=y [ 45.775943] WARNING: at lib/dma-debug.c:933 check_unmap+0x5d6/0x6ac() [ 45.782369] dw_dmac dw_dmac.0: DMA-API: device driver failed to check map error[device address=0x00000000356efcc0] [size=28 bytes] [mapped as single] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: absence of pdata isn't critical when autocfg is setAndy Shevchenko2013-01-09
| | | | | | | | | | | | | | | | | | | | | | The patch allows to probe the device when platform data is absent and hardware auto configuration is enabled. In that case the default platform data is used where the channel allocation order is set to ascending, channel priority is set to ascending, and private property is set to true. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: introduce to_dw_desc() macroAndy Shevchenko2013-01-08
| | | | | | | | | | | | | | | | | | | | The to_dw_desc() macro helps to retrieve the dw_desc node from the corresponding list_head structure. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * dw_dmac: change dev_crit to dev_WARN in dwc_handle_errorAndy Shevchenko2013-01-08
| | | | | | | | | | | | | | | | | | | | In case of handling a bad descriptor the dwc_handle_error() will dump a stack as well. It's a lot more verbose and more likely to get user's attention. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * dw_dmac: don't call platform_get_drvdata twiceAndy Shevchenko2013-01-08
| | | | | | | | | | | | | | | | | | | | There is no need to call platform_get_drvdata twice as we have it already in dw variable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * dw_dmac: change dev_printk() to corresponding macrosAndy Shevchenko2013-01-08
| | | | | | | | | | | | | | | | | | Change printk(KERN_INFO ..., dev_name(...), ...) to dev_info() as well. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * dmaengine: dw_dmac: amend description and indentationHeikki Krogerus2013-01-08
| | | | | | | | | | | | | | | | | | | | | | | | The driver will be used as a core part for various implementations of the DesignWare DMA device. The patch adjusts description on the top and corrects paragraph indentation in few places across the code. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * dmaengine: dw_dmac: Enhance device tree supportViresh Kumar2013-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> [Fixed __devinit usage] Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* | dma: Convert to devm_ioremap_resource()Thierry Reding2013-01-25
| | | | | | | | | | | | | | | | | | | | | | | | Convert all uses of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. devm_ioremap_resource() provides its own error messages so all explicit error messages can be removed from the failure code paths. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: dma: remove __dev* attributes.Greg Kroah-Hartman2013-01-03
|/ | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* dma: remove use of __devinitBill Pemberton2012-11-28
| | | | | | | | | | | | 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>
* dma: remove use of __devexit_pBill Pemberton2012-11-28
| | | | | | | | | | | 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>
* dw_dmac: fix a regression in dwc_prep_dma_memcpyAndy Shevchenko2012-10-02
| | | | | | | | Sometimes memory-to-memory test is failed, that's why we need to choose minimum data portion between source and destination limits together. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: introduce software emulation of LLP transfersAndy Shevchenko2012-09-27
| | | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: autoconfigure data_width or get it via platform dataAndy Shevchenko2012-09-27
| | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: autoconfigure block_size or use platform dataAndy Shevchenko2012-09-27
| | | | | | | | | | 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: get number of channels from hardware if possibleAndy Shevchenko2012-09-27
| | | | | | | | | | In case the controller has the encoded parameters feature enabled the driver will use it to get the number of channels. In the future it will be used for the other important parameters as well. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: mark dwc_dump_chan_regs as inlineAndy Shevchenko2012-09-27
| | | | | | Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dw_dmac: utilize slave_id to pass request lineAndy Shevchenko2012-09-13
| | | | | | | | | | | | There is slave_id field in the generic slave config structure that is dedicated for the uniq slave number. In our case we have the request lines wired to the certain hardware. Therefore the number of the request line is uniq and could be used as slave_id. It allows us in some cases to drop out the usage of the custom slave config structure. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* Merge branch 'for-3.7' into nextVinod Koul2012-08-05
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