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2013-02-24mmc: tmio-mmc: define device-tree bindingsGuennadi Liakhovetski
Define device-tree bindings for the tmio-mmc driver to be able to specify parameters, currently provided in platform data. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sh_mmcif: use mmc_of_parse() to parse standard MMC DT bindingsGuennadi Liakhovetski
Use mmc_of_parse() to get interface capability flags and used GPIOs from device-tree bindings. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: (cosmetic) remove "extern" from function declarationsGuennadi Liakhovetski
The "extern" keyword isn't required in function declarations, remove it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: provide a standard MMC device-tree binding parser centrallyGuennadi Liakhovetski
MMC defines a number of standard DT bindings. Having each driver parse them individually adds code redundancy and is error prone. Provide a standard function to unify the parsing. After all drivers are converted to using it instead of their own parsers, this function can be integrated into mmc_alloc_host(). Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: detailed definition of CD and WP MMC line polarities in DTGuennadi Liakhovetski
Clarify ways to specify write-protect and card-detect MMC lines in FDT. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhi, tmio: only check flags in tmio-mmc driver properGuennadi Liakhovetski
tmio-mmc platform flags can be set by various means, including caller drivers and device-tree bindings, therefore it is better to only check them in the tmio-mmc driver proper, not in caller drivers themselves. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci: Fix parameter of sdhci_do_start_signal_voltage_switch()Fabio Estevam
3714f4315354 ("mmc: sdhci: update signal voltage switch code") changed the type of the second parameter of sdhci_do_start_signal_voltage_switch(), from "struct mmc_ios *ios" to "int signal_voltage" which causes the following build warning: drivers/mmc/host/sdhci.c:2044:2: warning: initialization from incompatible pointer type [enabled by default] drivers/mmc/host/sdhci.c:2044:2: warning: (near initialization for 'sdhci_ops.start_signal_voltage_switch') [enabled by default] Use the previous type so that it matches the start_signal_voltage_switch() definition from host.h. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Reviewed-by: Johan Rudholm <johan.rudholm@stericsson.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci: check voltage range only on regulators aware of voltage valueMarek Szyprowski
Some regulators don't report any voltage values, so checking supported voltage range results in disabling all SDHCI_CAN_VDD_* flags and registration failure. This patch finally provides a correct fix for the registration of SDHCI driver with all possible voltage regulators: dummy, fixed and regulated without using regulator_count_voltages() hacks. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: bcm2835: set SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLKStephen Warren
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK does basically the same as implementing struct sdhci_ops .get_timeout_clock, so simply set that quirk and remove the custom code to simplify the driver. Reported-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: support packed write command for eMMC4.5 devicesSeungwon Jeon
This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Large amounts of data in one transfer rather than several data of small size are effective for eMMC write internally. As a result, packed command help write throughput be improved. The following tables show the results of packed write. Type A: test none | packed iozone 25.8 | 31 tiotest 27.6 | 31.2 lmdd 31.2 | 35.4 Type B: test none | packed iozone 44.1 | 51.1 tiotest 47.9 | 52.5 lmdd 51.6 | 59.2 Type C: test none | packed iozone 19.5 | 32 tiotest 19.9 | 34.5 lmdd 22.8 | 40.7 Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: add packed command feature of eMMC4.5Seungwon Jeon
This patch adds packed command feature of eMMC4.5. The maximum number for packing read (or write) is offered and exception event relevant to packed command which is used for error handling is enabled. If host wants to use this feature, MMC_CAP2_PACKED_CMD should be set. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: rtsx: remove driving adjustmentRoger Tseng
Several new models of readers use different way to select driving capability (a necessary adjustment along with voltage change). Removing this from device-independent rtsx_pci_sdmmc module. It will be implemented in device-depend calls encapsulated by rtsx_pci_switch_output_voltage(). Signed-off-by: Roger Tseng <rogerable@realtek.com> Reviewed-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: use regulator_can_change_voltage() instead of regulator_count_voltagesMarek Szyprowski
mmc_regulator_set_ocr() depends on the ability of regulator to change the voltage value. When regulator cannot change its voltage output, some code is skipped to avoid reporting false errors on some boards, which use MMC hosts with fixed regulators (e.g. Samsung Goni and UniversalC210 boards). This patch replaces a hacky workaround based on regulator_count_voltages() value with the correct call to recently introduced regulator_can_change_voltage() function in regulators core. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-pxav3: add pm runtime supportKevin Liu
Signed-off-by: Kevin Liu <kliu5@marvell.com> Signed-off-by: Jialing Fu <jlfu@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: fix indentationJaehoon Chung
This patch fixes incorrect indentation. (Just code cleanup) Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: block: don't start new request when the card is removedSeungwon Jeon
It's not necessary to start a new request while error handling if the card was removed. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Tested-by: Konstantin Dorfman <kdorfman@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: fix permanent sleep of mmcqd during card removalSeungwon Jeon
This patch is derived from: "mmc: fix async request mechanism for sequential read scenarios". According as async transfer, a request is handled with twice mmc_start_req. When the card is removed, the request is actually not issued in the first mmc_start_req [__mmc_start_data_req]. And then mmc_wait_for_data_req_done will come in the next mmc_start_req. But there is no event for completions. wake_up_interruptible is needed in __mmc_start_data_req for the case of removed card. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Tested-by: Konstantin Dorfman <kdorfman@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci: enhance preset value functionKevin Liu
4d55c5a1 ("mmc: sdhci: enable preset value after uhs initialization") added preset value support and enabled it by default during sd card init. Below are the enhancements introduced by this patch: 1. In current code, preset value is enabled after setting clock finished, which means the clock is manually set by driver firstly and then suddenly switched to preset value at this point. So the first setting is useless and unnecessary. What's more, the first clock setting may differ from the preset one. The better way is enable preset value just after switch to UHS mode so the preset value can take effect immediately. So move preset value enable from mmc_sd_init_card to sdhci_set_ios which will be called during set timing. 2. In current code, preset value is disabled at the beginning of mmc_attach_sd. It's too late since low freq (400khz) should be set in mmc_power_up. So move preset value disable to sdhci_set_ios which will be called during power up. 3. host->clock and ios->drv_type should also be updated according to the preset value if it's enabled. Current code missed this. 4. This patch also introduce a quirk to disable preset value in case preset value doesn't work. This patch has been verified on sdhci-pxav3 platform with both preset enabled and disabled. Signed-off-by: Kevin Liu <kliu5@marvell.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: mmc_spi: Fix return value evaluation of irq_of_parse_and_map()Roland Stigge
When irq_of_parse_and_map() returns an error, it does as zero. But in mmc_spi_get_pdata(), the error return case is compared against NO_IRQ. This might work where NO_IRQ is zero (defaults to zero when undefined, as on MIPS) but not where NO_IRQ is different, e.g. on ARM where it's -1. This patch changes to comparison with 0 which is the error return value of irq_of_parse_and_map(). Tested on ARM that mmc_spi is working now. Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: MAINTAINERS update for omap_hsmmcBalaji T K
Update Maintainer email for omap_hsmmc, as Venkatraman will no longer be able to maintain omap_hsmmc driver. Signed-off-by: Balaji T K <balajitk@ti.com> Acked-by: Venkatraman S <svenkatr@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-pltfm: Add a common clk API implementation of get_timeout_clockLars-Peter Clausen
Quite a few drivers have a implementation of the get_timeout_clock callback which simply returns the result of clk_get_rate on the device's clock. This patch adds a common implementation of this to the sdhci-pltfm module and replaces all custom implementations with the common one. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Kevin Liu <kliu5@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci: update signal voltage switch codeKevin Liu
The protocol related code is moved to core stack. So update the host driver accordingly. Signed-off-by: Kevin Liu <kliu5@marvell.com> Tested-by: Tim Wang <wangtt@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: Fixup signal voltage switchJohan Rudholm
When switching SD and SDIO cards from 3.3V to 1.8V signal levels, the clock should be gated for 5 ms during the step. After enabling the clock, the host should wait for at least 1 ms before checking for failure. Failure by the card to switch is indicated by dat[0:3] being pulled low. The host should check for this condition and power-cycle the card if failure is indicated. Add a retry mechanism for the SDIO case. If the voltage switch fails repeatedly, give up and continue the initialization using the original voltage. This patch places a couple of requirements on the host driver: 1) mmc_set_ios with ios.clock = 0 must gate the clock 2) mmc_power_off must actually cut the power to the card 3) The card_busy host_ops member must be implemented if these requirements are not fulfilled, the 1.8V signal voltage switch will still be attempted but may not be successful. Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com> Signed-off-by: Kevin Liu <kliu5@marvell.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: Break out start_signal_voltage_switchJohan Rudholm
Allow callers to access the start_signal_voltage_switch host_ops member without going through any cmd11 logic. This is mostly a preparation for the following signal voltage switch patch. Also, reset ios.signal_voltage to its original value if start_signal_voltage_switch fails. Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: Add card_busy to host_opsJohan Rudholm
This host_ops member is used to test if the card is signaling busy by pulling dat[0:3] low. Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: Add mmc_power_cycleJohan Rudholm
Add mmc_power_cycle which can be used to power cycle for instance SD-cards. Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sd: Simplify by using mmc_host_uhsJohan Rudholm
Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: expose RPMB partition only for CMD23 capable hostsBalaji T K
SET_BLOCK_COUNT CMD23 is needed for all access to RPMB partition. If block count is not set by CMD23, all subsequent read/write commands fail as per eMMC specification. So, If the host does not support CMD23, do not expose RPMB partition. Accessing RPMB partition can cause hang / huge delay for hosts which do not support CMD23. Signed-off-by: Balaji T K <balajitk@ti.com> Reported-and-Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: goldfish: emulated MMC deviceMike Lockwood
This driver handles the virtual MMC device present in the Goldfish emulator. The patch folds together initial work from Mike Lockwood and patches by San Mehat, Jun Nakajima and Tom Keel <thomas.keel@intel.com> plus cleanups by Alan Cox to get it all into 3.6 shape. Signed-off-by: Mike A. Chan <mikechan@google.com> [cleaned up and x86 support added] Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com> Signed-off-by: Xiaohui Xin <xiaohui.xin@intel.com> Signed-off-by: Jun Nakajima <jun.nakajima@intel.com> Signed-off-by: Bruce Beare <bruce.j.beare@intel.com> [Moved to 3.4] Signed-off-by: Tom Keel <thomas.keel@intel.com> [Moved to 3.7] Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: dt: bus-width can be an optional propertyShawn Guo
None of mmc drivers implements bus-width as a required device tree property. Instead, some drivers like atmel-mci, dw_mmc, sdhci-s3c implement it as an optional one, and will force bus width to be 1 when the property is absent. Let's change the common binding to reflect what the drivers are usually doing. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: support 8bit modeSascha Hauer
The i.MX esdhc has a nonstandard bit layout for the SDHCI_HOST_CONTROL register. To support 8bit bus width on i.MX populate the platform_bus_width callback. This is tested on an i.MX25, but should according to the datasheets work on the other i.MX using this hardware aswell. The i.MX6, while having a SDHCI_SPEC_300 controller, still uses the same nonstandard register layout. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci: rename platform_8bit_width to platform_bus_widthSascha Hauer
The 8bit in the function name is misleading. When set, it will be used to set the bus width, regardless of whether 8bit or another bus width is requested, so change the function name to platform_bus_width. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: Auto CMD23 support for usdhcShawn Guo
SDHCI core will try to use Auto CMD23 for mmc card. Currently, we will see the following message with mmc card on usdhc due to the lacking of Auto CMD23 support in the driver. $ mmc0: new high speed MMC card at address 0001 mmcblk1: mmc0:0001 MMC02G 1.87 GiB mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 mmcblk1: retrying using single block read mmcblk1: Enable Auto CMD23 support for usdhc so that mmc card can work in multiple block mode. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: manually reset MIX_CTRL for usdhcShawn Guo
It's another violation to SDHC spec that software reset on usdhc does not reset MIX_CTRL register. Have to do it manually, otherwise the preserving of the register bits (e.g. AC23EN) may cause mmc card fail to be initialized. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: separate transfer mode from command write for usdhcShawn Guo
The combining of SDHCI_TRANSFER_MODE and SDHCI_COMMAND writes is only required for esdhc, but not necessarily for usdhc. Different from esdhc where the bits for transfer mode and command are all in the same register CMD_XFR_TYP, usdhc has a newly introduced register MIX_CTRL to hold transfer mode bits. So it makes more sense to separate transfer mode from command write for usdhc. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: core: move the cache disabling operation to mmc_suspendMaya Erez
Cache control is an eMMC feature and in therefore should be part of MMC's bus resume operations, performed in mmc_suspend, rather than in the generic mmc_suspend_host(). Signed-off-by: Maya Erez <merez@codeaurora.org> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24MAINTAINERS: mmc: add maintainer entry for dw_mmc driverSeungwon Jeon
Add maintainer entry for the Synopsys DW host driver which is used in various SOC including EXYNOS series. As Will Newton will no longer be able to take care of dw_mmc*, I and Jaehoon Chung are willing to maintain it. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Acked-by: Will Newton <will.newton@imgtec.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: Remove unused variablesFabio Estevam
3f175a6e5 (mmc: sdhci-esdhc-imx: remove ESDHC_CD_GPIO handling from IO accessory) introduced the following build warnings: drivers/mmc/host/sdhci-esdhc-imx.c:149:30: warning: unused variable 'boarddata' [-Wunused-variable] drivers/mmc/host/sdhci-esdhc-imx.c:181:30: warning: unused variable 'boarddata' [-Wunused-variable] Remove the unused variables. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: fix DT binding documentation SDHCI left-overGuennadi Liakhovetski
The file Documentation/devicetree/bindings/mmc/mmc.txt is common for all MMC host drivers. Use a generic MMC host reference instead of an SDHCI left-over. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: name esdhc specific definitions with ESDHC_ prefixShawn Guo
Rename esdhc local definitions with ESDHC_ rather than SDHCI_ prefix, so that we can distinguish them from SDHCI core definitions from name. A couple of bit fields are also changed use shift for consistency and better readability. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: remove D3CD check from SDHCI_HOST_CONTROL writeShawn Guo
SDHCI_CTRL_D3CD is not a standard SDHCI_HOST_CONTROL, so there is no need to check it in SDHCI_HOST_CONTROL write at all. Remove it. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: sdhci-esdhc-imx: fix host version readShawn Guo
When commit 95a2482 (mmc: sdhci-esdhc-imx: add basic imx6q usdhc support) works around host version issue on imx6q, it gets the register address fixup "reg ^= 2" lost for imx25/35/51/53 esdhc. Thus, the controller version on these SoCs is wrongly identified as v1 while it's actually v2. Add the address fixup back and take a different approach to correct imx6q host version, so that the host version read gets back to work for all SoCs. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: vt8500: Remove erroneous __exitp in wmt_mci_driverTony Prisk
With the __devinit/__devexit attributes having been removed, this __exitp attribute causes an unused function warning and should be removed as well. Signed-off-by: Tony Prisk <linux@prisktech.co.nz> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: dw_mmc: Remove DW_MCI_QUIRK_NO_WRITE_PROTECTDoug Anderson
The original quirk was added in the change 'mmc: dw_mmc: add quirk to indicate missing write protect line'. The original quirk was added at a controller level even though each slot has its own write protect (so the quirk should be at the slot level). A recent change (mmc: dw_mmc: Add "disable-wp" device tree property) added a slot-level quirk and support for the quirk directly to dw_mmc. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Will Newton <will.newton@imgtec.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: dw_mmc: Handle wp-gpios from device treeDoug Anderson
On some SoCs (like exynos5250) you need to use an external GPIO for write protect. Add support for wp-gpios to the core dw_mmc driver since it could be useful across multiple SoCs. With this change I am able to make use of the write protect for the external SD slot on exynos5250-snow. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: dw_mmc: exynos: Remove code for wp-gpiosDoug Anderson
The exynos code claimed the write protect with devm_gpio_request() but never did anything with it. That meant that anyone using a write protect GPIO would effectively be write protected all the time. The handling for wp-gpios belongs in the main dw_mmc driver and has been moved there. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24ARM: dts: Add disable-wp for sd card slot on smdk5250Doug Anderson
The next change will remove the code from the dw_mmc-exynos that added the DW_MCI_QUIRK_NO_WRITE_PROTECT. Keep existing functionality of having no write protect pin on smdk5250 by adding the disable-wp property. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: dw_mmc: Add "disable-wp" device tree propertyDoug Anderson
The "disable-wp" property is used to specify that a given SD card slot doesn't have a concept of write protect. This eliminates the need for special case code for SD slots that should never be write protected (like a micro SD slot or a dev board). The dw_mmc driver is special in needing to specify "disable-wp" because the lack of a "wp-gpios" property means to use the special purpose write protect line. On some other mmc devices the lack of "wp-gpios" means that write protect should be disabled. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Will Newton <will.newton@imgtec.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: correct the EXCEPTION_EVENTS_STATUS value in commentZhang, YiX X
The right value is 54 according to eMMC 4.5 specification. Signed-off-by: ZhangYi <yix.x.zhang@intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24mmc: mxs-mmc: Fix warning due to incorrect typeFabio Estevam
Fixes the following warning when building with W=1 option: drivers/mmc/host/mxs-mmc.c: In function 'mxs_mmc_adtc': drivers/mmc/host/mxs-mmc.c:401:2: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] The warning happens because 'i' is used in 'for_each_sg(sgl, sg, sg_len, i)' and should be made unsigned. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
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