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path: root/drivers/mmc/host/sh_mmcif.c
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* Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2012-07-241-40/+48
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull slave-dmaengine update from Vinod Koul: "This time we have a new dmaengine driver from the tegra folks. Also we have Guennadi's cleanup of sh drivers which incudes a library for sh drivers. And the usual odd fixes in bunch of drivers and some nice cleanup of dw_dmac from Andy." Fix up conflicts in drivers/mmc/host/sh_mmcif.c * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (46 commits) dmaengine: Cleanup logging messages mmc: sh_mmcif: switch to the new DMA channel allocation and configuration dma: sh: provide a migration path for slave drivers to stop using .private dma: sh: use an integer slave ID to improve API compatibility dmaengine: shdma: prepare to stop using struct dma_chan::private sh: remove unused DMA device pointer from SIU platform data ASoC: siu: don't use DMA device for channel filtering dmaengine: shdma: (cosmetic) simplify a static function dmaengine: at_hdmac: add a few const qualifiers dw_dmac: use 'u32' for LLI structure members, not dma_addr_t dw_dmac: mark dwc_dump_lli inline dma: mxs-dma: Export missing symbols from mxs-dma.c dma: shdma: convert to the shdma base library ASoC: fsi: prepare for conversion to the shdma base library usb: renesas_usbhs: prepare for conversion to the shdma base library ASoC: siu: prepare for conversion to the shdma base library serial: sh-sci: prepare for conversion to the shdma base library mmc: sh_mobile_sdhi: prepare for conversion to the shdma base library mmc: sh_mmcif: remove unneeded struct sh_mmcif_dma, prepare to shdma conversion dma: shdma: prepare for conversion to the shdma base library ...
| * mmc: sh_mmcif: switch to the new DMA channel allocation and configurationGuennadi Liakhovetski2012-07-201-35/+47
| | | | | | | | | | | | | | | | | | | | | | | | Using the "private" field from struct dma_chan is deprecated. The sh dmaengine driver now also supports the preferred DMA channel allocation and configuration method, using a standard filter function and a channel configuration operation. This patch updates sh_mmcif to use this new method. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
| * mmc: sh_mmcif: remove unneeded struct sh_mmcif_dma, prepare to shdma conversionGuennadi Liakhovetski2012-07-131-14/+10
| | | | | | | | | | | | | | | | | | | | | | Now that all users have been updated to use the embedded in struct sh_mmcif_plat_data DMA slave IDs, struct sh_mmcif_dma is no longer needed and can be removed. This also makes preparation to the shdma base library conversion easier. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* | mmc: sh_mmcif: support generic card-detectionGuennadi Liakhovetski2012-07-211-0/+18
| | | | | | | | | | | | | | | | | | Extend the sh_mmcif driver to support GPIO card detection, provided by the slot function module. The original .get_cd() platform callback is also preserved for now. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh-mmcif: add OF support, make platform data optionalGuennadi Liakhovetski2012-07-211-9/+20
| | | | | | | | | | | | | | | | Add primitive OF support to the sh-mmcif driver, which also makes it necessary to be able to run without platform data. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: add regulator supportGuennadi Liakhovetski2012-07-211-7/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add regulator support to the sh_mmcif driver, but also preserve the current power-callback. Also note, that the card power is not switched off during clock gating periods, hence there's no need to power it on every time the card is re-activated. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: remove redundant .down_pwr() callbackGuennadi Liakhovetski2012-07-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | From the original version of sh_mmcif the .set_pwr() callback has only been used to turn the card's power on, and the .down_pwr() callback has been used to turn it off. .set_pwr() can be used for both these tasks, which is also how it is implemented by the only user of this API: the SH7724 ecovec board. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: re-read the clock frequency every time it is turned onGuennadi Liakhovetski2012-07-211-5/+18
| | | | | | | | | | | | | | | | | | | | | | With aggressive clock gating the clock can be disabled during interface inactivity. During this time its frequency can be changed by another its user. Therefore when the interface is activated again and the clock is re-enabled, its frequency has to be re-read. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: fix clock managementGuennadi Liakhovetski2012-07-211-23/+23
| | | | | | | | | | | | | | | | | | | | | | Regardless of whether the MMC bus clock is the same as the PM clock on this specific interface, it has to be managed separately. Its proper management should also include enabling and disabling of the clock, whenever the interface is becoming active or going idle respectively. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: simplify and use meaningful label names in error-handlingGuennadi Liakhovetski2012-07-211-21/+20
| | | | | | | | | | | | | | | | | | | | A check for NULL platform data can be conveniently made in the very beginning of probing. Replace numbered error-handling labels in .probe() with meaningful names to make any future reorganisation simpler. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: Support MMC_SLEEP_AWAKE commandLaurent Pinchart2012-07-211-10/+4
|/ | | | | | | | | | | The MMC_SLEEP_AWAKE and SD_IO_SEND_OP_COND commands share the same opcode. SD_IO_SEND_OP_COND isn't supported by the SH MMCIF, but MMC_SLEEP_AWAKE is. Discriminate between the two commands using the command flags, and reject SD_IO_SEND_OP_COND only. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: Simplify calculation of mmc->f_minSimon Horman2012-04-051-7/+1
| | | | | | | | | | | | | There is no need to tune mmc->f_min to a value near 400kHz as the MMC core begins testing frequencies at 400kHz regardless of the value of mmc->f_min. As suggested by Guennadi Liakhovetski. Cc: Magnus Damm <magnus.damm@gmail.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Tested-by: Cao Minh Hiep <hiepcm@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: mmc->f_max should be half of the bus clockSimon Horman2012-04-051-6/+6
| | | | | | | | | | | | mmc->f_max should be half of the bus clock. And now that mmc->f_max is not equal to the bus clock the latter should be used directly to calculate mmc->f_min. Cc: Magnus Damm <magnus.damm@gmail.com> Tested-by: Cao Minh Hiep <hiepcm@gmail.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: double clock speedSimon Horman2012-04-051-1/+2
| | | | | | | | | | | | | | | Correct an off-by one error when calculating the clock divisor in cases where the host clock is a power of two of the target clock. Previously the divisor was one greater than the correct value in these cases leading to the clock being set at half the desired speed. Thanks to Guennadi Liakhovetski for working with me on the logic for this change. Tested-by: Cao Minh Hiep <hiepcm@gmail.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Ball <cjb@laptop.org>
* Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2012-03-291-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * dmaengine/dma_slave: introduce inline wrappersAlexandre Bounine2012-03-211-2/+2
| | | | | | | | | | | | | | | | | | | | 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>
* | mmc: sh_mmcif: fix MMC_GEN_CMD settingShimoda, Yoshihiro2012-03-271-2/+0
| | | | | | | | | | | | | | | | The MMC_GEN_CMD (CMD56) doesn't need to check busy signal. So, the patch fixes the setting. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* | Merge branch 'pm-qos'Rafael J. Wysocki2012-03-161-0/+5
|\ \ | | | | | | | | | | | | | | | | | | * pm-qos: sh_mmcif / PM: Use PM QoS latency constraint tmio_mmc / PM: Use PM QoS latency constraint PM / QoS: Make it possible to expose PM QoS latency constraints
| * | sh_mmcif / PM: Use PM QoS latency constraintRafael J. Wysocki2012-03-131-0/+5
| |/ | | | | | | | | | | | | | | Make sh_mmcif call dev_pm_qos_expose_latency_limit() to expose the PM QoS latency limit to user space and specify the initial value of it as 100 microseconds. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* / mmc: sh_mmcif: fix late delayed work initialisationGuennadi Liakhovetski2012-02-131-7/+9
|/ | | | | | | | | | | | | | | | | If the driver is loaded with a card in the slot, mmc_add_host() will schedule an immediate card-detection work, which will start IO and wait for command completion. Usually the kernel first returns to the sh_mmcif probe function, lets it finish and only then schedules the rescan work. But sometimes, expecially under heavy system load, the work will be scheduled immediately before returning to the probe method. In this case it is important for the driver to be fully prepared for IO. For sh_mmcif this means, that also the timeout work has to be initialised before calling mmc_add_host(). It is also better to prepare interrupts beforehand. Besides, since mmc_add_host() does card-detection itself, there is no need to do it again immediately afterwards. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2012-01-171-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * '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.
| * Merge branch 'dma_slave_direction' into next_test_dirnVinod Koul2011-11-171-2/+2
| |\ | | | | | | | | | | | | resolved conflicts: drivers/media/video/mx3_camera.c
| | * mmc-host: move to dma_transfer_directionVinod Koul2011-10-311-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fixup usage of dma direction by introducing dma_transfer_direction, this patch moves mmc drivers to use new enum Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Chris Ball <cjb@laptop.org> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* | | mmc: sh_mmcif: remove now superfluous sh_mmcif_host::data memberGuennadi Liakhovetski2012-01-111-44/+50
| | | | | | | | | | | | | | | Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: sh_mmcif: process requests asynchronouslyGuennadi Liakhovetski2012-01-111-172/+416
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts the sh_mmcif MMC host driver to process requests asynchronously instead of waiting in its .request() method for completion. This is achieved by using threaded IRQs. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: sh_mmcif: cosmetic clean upGuennadi Liakhovetski2012-01-111-45/+34
| | | | | | | | | | | | | | | | | | | | | | | | This patch doesn't introduce any functional changes, it only simplifies some code fragments, removes superfluous parameters, fixes typos. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: sh_mmcif: process error interrupts firstGuennadi Liakhovetski2012-01-111-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an interrupt is coming with both error and data completion status bits set, it has to be handled as an error interrupt, for which error interrupts have to be processed first. The current version of the driver on the contrary doesn't recognise such interrupts as an error event, which leads to data corruption and breaks the error recovery. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: convert drivers/mmc/host/* to use module_platform_driver()Axel Lin2012-01-111-13/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts the drivers in drivers/mmc/host/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: "Michał Mirosław" <mirq-linux@rere.qmqm.pl> Acked-by: David Brown <davidb@codeaurora.org> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: sh_mmcif: simplify clock divisor calculationGuennadi Liakhovetski2012-01-111-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Replace ilog2(__rounddown_pow_of_two(x)) with the equivalent but much simpler fls(x) - 1. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | | mmc: sh_mmcif: fix clock gating on platforms with a .down_pwr() methodGuennadi Liakhovetski2011-12-101-1/+1
|/ / | | | | | | | | | | | | | | Do not power down the card in .set_ios(), unless MMC_POWER_OFF is requested. This fixes the MMCIF interface functionality on ecovec boards. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: Add module.h to drivers/mmc users assuming implicit presence.Paul Gortmaker2011-10-261-0/+1
| | | | | | | | | | | | | | | | | | We are cleaning up the implicit presence of module.h; these guys are some of the people who just assume it will be there. Call it out explitly for those that really need it. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* | mmc: sh_mmcif: simplify platform dataGuennadi Liakhovetski2011-10-261-4/+16
|/ | | | | | | | Provide platforms with a simplified way to specify MMCIF DMA slave IDs in a way, similar to SDHI and other sh_dma clients. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: maximize power savingGuennadi Liakhovetski2011-07-211-9/+18
| | | | | | | | This patch uses runtime PM to allow the system to power down the MMC controller, when the MMC closk is switched off. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: add runtime and system power-management support to the MMCIF driverGuennadi Liakhovetski2011-05-241-9/+69
| | | | | | | | | | | | | Adding support for runtime power-management to the MMCIF driver allows it to save power as long as no card is present. To also allow to turn off the power domain at that time, we release DMA channels during that time, since on some sh-mobile systems the DMA controller(s) and the MMCIF block belong to the same power domain. System-wide power management has been tested with experimental PM patches on AP4-based systems. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: protect against a theoretical raceGuennadi Liakhovetski2011-05-241-8/+42
| | | | | | | | | | | | The MMC subsystem does not guarantee that host driver .request() and .set_ios() callbacks are serialised. Such concurrent calls, however, do not have to be meaningfully supported, drivers just have to make sure to avoid any severe problems. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Simon Horman <horms@verge.net.au> Cc: Magnus Damm <damm@opensource.se> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: support aggressive clock gatingGuennadi Liakhovetski2011-03-161-5/+5
| | | | | | | | To support MMC aggressive clock gating the driver has to stop the interface clock when the .set_ios() method is called with .clock == 0. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: use dmaengine helpers, drop submit checkLinus Walleij2011-03-151-16/+6
| | | | | | | | | Use the new dmaengine helper functions, and drop the error check on the returned cookier from the dmaengine - we recently established that this is really not allowed to fail. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: rename and retype activity variableLinus Walleij2011-03-151-9/+9
| | | | | | | | The host_sglen is now actually used to keep track of whether DMA is active or not, so rename and retype it to bool. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: unmap with the proper sglenLinus Walleij2011-03-151-2/+2
| | | | | | | | | According to the DMA-API you shall unmap the sglists with the same sglist length as passed into the mapping function, not the returned value from the mapping function. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: map DMA buffers on the DMA engine deviceLinus Walleij2011-03-151-4/+8
| | | | | | | | As established for the MMCI, it is proper to map the DMA buffers on the DMA engine which is the one actually performing the DMA. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
* mmc: sh_mmcif: make DMA support by the driver unconditionalGuennadi Liakhovetski2011-01-051-20/+0
| | | | | | | | | Simplify the driver by removing the possibility to build it without the DMA support and remove the respective Kconfig parameter. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc: sh_mmcif: add DMA supportGuennadi Liakhovetski2010-11-251-5/+241
| | | | | | | | | | | The MMCIF controller on sh-mobile platforms can use the DMA controller for data transfers. Interface to the SH dmaengine driver to enable DMA. We also have to lower the maximum number of segments to match with the number od DMA descriptors on SuperH, this doesn't significantly affect driver's PIO performance. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc: sh_mmcif: cosmetic clean upGuennadi Liakhovetski2010-11-251-33/+30
| | | | | | | | Replace pr_* with respective dev_*, sort headers alphabetically, remove an unused struct member, superfluous variable initialisations and type-casts. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc: sh_mmcif: switch to completion, fix flagsGuennadi Liakhovetski2010-11-251-71/+46
| | | | | | | | | | | | | In sh_mmcif.c an event is used as a completion, switch over. When a wait_for_completion*_timeout() returns, it suffices to check the remaining time, setting an additional flag before waking up the waiting task only reduces the race window, but does not eliminate it. This patch switches the driver to use a completion to signal an interrupt, the only case, when an interrupt should not wake up the waiter, is when an automatic CMD12 completes. Also fix MODULE_ALIAS. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc, sh: Move constants to sh_mmcif.hSimon Horman2010-11-101-23/+0
| | | | | | | | | | | | | | This moves some constants from sh_mmcif.c to sh_mmcif.h so that they can be used in sh_mmcif_boot_init(). It also alters the definition of SOFT_RST_OFF from (0 << 31) to ~SOFT_RST_ON (= ~(1 << 31)). The former seems bogus. The latter is consistent with the code in sh_mmcif_boot_init(). Cc: Yusuke Goda <yusuke.goda.sx@renesas.com> Cc: Magnus Damm <magnus.damm@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc: Allow the platform to specify the sh_mmcif get_cd handlerArnd Hannemann2010-10-291-0/+12
| | | | | | | | | | | | | In some platforms (e.g. AP4EVB) the card detect pin of a slot is not directly connected to the sh_mmcif controller, so that polling needs to be used. To overcome the overhead induced by querying the controller on each poll cycle, card detection can be handled in the platform code more efficiently. This patch exposes a get_cd hook for that purpose. Signed-off-by: Arnd Hannemann <arnd@arndnet.de> Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mmc: Remove distinction between hw and phys segmentsMartin K. Petersen2010-10-231-2/+1
| | | | | | | | | We have deprecated the distinction between hardware and physical segments in the block layer. Consolidate the two limits into one in drivers/mmc/. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Chris Ball <cjb@laptop.org>
* sh: prepare MMCIF driver header fileMagnus Damm2010-05-311-75/+50
| | | | | | | | | Update the MMCIF driver to include register information and register access functions in the header file. The MMCIF boot code builds on top of this. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* mmc: add support MMCIF for SuperHYusuke Goda2010-05-271-0/+965
MMCIF is the MMC Host Interface in SuperH. Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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