- 27 Jun, 2013 40 commits
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Ulf Hansson authored
The DT-binding for MMC_CAP2_FULL_PWR_CYCLE, is used to indicate whether it is possible to perform a full power cycle of the card. Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
Chris Ball <cjb@laptop.org>
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Ulf Hansson authored
MMC_CAP2_FULL_PWR_CYCLE shall be set by host drivers which are able to do a complete power cycle of the card. In the eMMC case that includes both vcc and vccq. This CAP is providing the protocol layer with important information, needed to take optimized decisions during card initialization and in the suspend/resume sequence. MMC_CAP2_POWEROFF_NOTIFY is replaced by MMC_CAP2_FULL_PWR_CYCLE, since it makes sense to use a wider scope for it. Signed-off-by:
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Ulf Hansson authored
In suspend mode it is important to save power. If the host is able to cut buth vcc and vccq, the MMC_CAP2_POWEROFF_NOTIFY shall be set. It will mean the card will be completely powered down at suspend and the power off notification cmd will be sent prior power down. It seems common not being able to cut both vcc and vccq for a host. In this situation we issue the sleep cmd in favor of the power off notification cmd, to save more power. While maintainng the above policy, we also want to make use of the power off notification in the shutdown sequence, even in the case were the host has not set MMC_CAP2_POWEROFF_NOTIFY, since we know vcc and vccq will regardless be cut. We accomplish this by always enabling the power off notification byte in the EXT_CSD and issue the power off notification when either MMC_CAP2_POWEROFF_NOTIFY is set or we are executing a shutdown. Signed-off-by:
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Ulf Hansson authored
The shutdown sequence of an (e)MMC is very similar to a suspend. We re-use the suspend function and tell it we are not in suspend context. Signed-off-by:
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Ulf Hansson authored
Depending on the context of the operation while powering down the card, either POWER_OFF_NOTIFY_SHORT or POWER_OFF_NOTIFY_LONG will be used. In suspend context a short timeout is preferred while a long timeout would be acceptable in a shutdown/hibernation context. We add a new parameter to the mmc_suspend function so we can provide an indication of what notification type to use. Signed-off-by:
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Ulf Hansson authored
For the SD .shutdown callback we re-use the SD suspend function since it performs the relevant actions. Signed-off-by:
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Ulf Hansson authored
By adding an optional .shutdown callback to the bus_ops struct we provide the possibility to let each bus type handle it's shutdown requirements. Signed-off-by:
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Ulf Hansson authored
Considering shutdown of the card, the responsibility to initate this sequence shall be driven from the mmc_bus. This patch enables the mmc_bus to handle this sequence properly. A new .shutdown callback is added in the mmc_driver struct which is used to shutdown the blk device. Signed-off-by:
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Ulf Hansson authored
The host should be responsible to suspend|resume the host and not the card. This patch changes this behaviour, by moving the responsiblity to the mmc bus instead which already holds the card device. The exported functions mmc_suspend|resume_host are now to be considered as depcrecated. Once all host drivers moves away from using them, we can remove them. As of now, a successful error code is always returned. Signed-off-by:
Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by:
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Ulf Hansson authored
By moving code from the mmc_suspend|resume_host down into each .suspend|resume bus_ops callback, we get a more flexible solution. Some nice side effects are that we get a better understanding of each bus_ops suspend|resume sequence and the common code don't have to take care of specific corner cases, especially for the SDIO case. Signed-off-by:
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Ulf Hansson authored
This patch moves the validation for all the suspend prerequisites to be done at SUSPEND_PREPARE notification. Previously in the SDIO case parts of the validation was done from mmc_suspend_host. This patch invents a new pre_suspend bus_ops callback and implements it for SDIO. Returning an error code from it, will mean at SUSPEND_PREPARE notification, the card will be removed before proceeding with the suspend sequence. Signed-off-by:
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Ulf Hansson authored
For every bus_ops type the .remove callback always exist, thus there are no need to check the existence of it, before we decide to call it. Signed-off-by:
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Lars-Peter Clausen authored
Use managed resources for the mmio memory region and the clock. Makes the code a bit shorter. Signed-off-by:
Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:
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Lars-Peter Clausen authored
Use the slot-gpio helpers to handle the write protect and card detect GPIO pins instead of re-implementing the same functionality in the driver. Signed-off-by:
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Lars-Peter Clausen authored
It's a bit shorter than open-conding it. While we are at it also make jz4740_mmc_pm_ops static. Signed-off-by:
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Paul Cercueil authored
For no reason, the code handling write errors was implemented while the code handling read errors was missing. Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Signed-off-by:
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Paul Cercueil authored
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Shawn Guo authored
The following error randomly appears on an imx6q board where gpio is used to implement card-detection when mounting EXT4 rootfs during boot. mmc1: Card removed during transfer! mmc1: Resetting controller. mmcblk0: unknown error -123 sending read/write command, card status 0x900 end_request: I/O error, dev mmcblk0, sector 106744 EXT4-fs error (device mmcblk0p2): ext4_find_entry:1312: inode #5011: comm swapper/0: reading directory lblock 0 It turns out that the error message comes from the card removal check in function sdhci_card_event(). While we have a well implemented function sdhci_do_get_cd() handling all the possible cases of CD, the current code only checks controller internal CD case. That causes problem for other CD cases like gpio on above imx6q board. Improve the check by using sdhci_do_get_cd() to cover all possible CD cases, so that above error on the imx6q board gets fixed. Signed-off-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Doug Anderson authored
As of now we rely on code outside of the driver to set the ciu clock frequency. There's no reason to do that. Add support for setting up the clock in the driver during probe. Signed-off-by:
Doug Anderson <dianders@chromium.org> Acked-by:
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Doug Anderson authored
It is possible to specify a regulator that should be turned on when dw_mmc is probed. At the moment dw_mmc will fail to use the regulator properly if the regulator probes after dw_mmc. Fix this problem by honoring EPROBE_DEFER. At the same time move the regulator code out of the slot init code. We only specify one regulator for the whole device and other parts of the code (like suspend/resume) assume that the regulator has only been enabled once. Signed-off-by:
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Lucas Stach authored
In order to make it possible to reduce the SD bus frequency, parse the optional "max-frequency" attribute as documented in devicetree/bindings/mmc/mmc.txt Signed-off-by:
Lucas Stach <l.stach@pengutronix.de> Acked-by:
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Lucas Stach authored
The SDCLK is divided down from the host controller clock. Host controller clock may be different from the maximum SDCLK, so get it from the platform, instead of just using the max SDCLK. Signed-off-by:
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Yaniv Gardi authored
Inside the routine mmc_blk_ioctl_cmd() the sanitize command is identified according to the value of bits 16-23 of the argument. but what happens if a different command is sent, and only by chance, bits 16-23 contain the value of SANITIZE command ? In that case a SANITIZE command will be falsely identified. In order to prevent such a case, the condition is expanded and now it also checks the opcode itself, and verifies that it is an MMC_SWITCH opcode. Signed-off-by:
Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by:
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Nicolas Ferre authored
Header file not needed anymore as we have removed the calls to cpu_is_xxx() macro. Signed-off-by:
Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by:
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by:
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Andy Shevchenko authored
The PCI driver is getting simplier and tidier with pcim_* and devm_* functions in use. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by:
Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by:
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Andy Shevchenko authored
In few places usage of ret variable is not needed. This patch simplifies those pieces of code. Signed-off-by:
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Andy Shevchenko authored
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by:
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Paul Taysom authored
We had a multi-partition SD-Card with two ext2 file systems. The partition table was getting overwritten by a race between the card removal and the unmount of the 2nd ext2 partition. What was observed: 1. Suspend/resume would call to remove the device. The clearing of the device information is done asynchronously. 2. A request is made to unmount the file system (this is called after the removal has started). 3. The remapping table was cleared by the asynchronous part of the device removal. 4. A write request to the super block (block 0 of the partition) was sent down and instead of being remapped to the partition offset, it was remapped to block 0 of the device which is where the partition table is located. 5. Write was queued and written resulting in the overwriting of the partition table with the ext2 super block. 6. The mmc_queue is cleaned up. The mmc card device driver used to access SD cards, was calling del_gendisk before calling mmc_cleanup-queue. The comment in the mmc_blk_remove_req code indicated that it expected del_gendisk to block all further requests from being queued but it doesn't. The mmc driver uses the presences of the mmc_queue to determine if the request should be queued. The fix was to clean up the mmc_queue before the rest of the the delete partition code is called. This prevents the overwriting of the partition table. However, the umount gets an error trying to write the super block. The umount should be issued before the device is removed but that is not always possible. The umount is still needed to cleanup other data structures. Addresses the problem described in http://crbug.com/240815Signed-off-by:
Paul Taysom <taysom@chromium.org> Signed-off-by:
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Arnd Bergmann authored
Patch "mmc: sdhci: Add size for caller in init+register" changed the interface for sdhci_pltfm_init, while patch "mmc: sdhci-sirf: add mmc host sdhci-pltfm based driver for SiRF SoCs" added a new driver with the old interface. This changes the sirf driver to use the new interface, avoiding one warning, and simplifying the init sequence. Since we're here already, this also adds an error path for failed clk_prepare_enable. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Christian Daudt <csd@broadcom.com> Signed-off-by:
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Jingoo Han authored
Use the wrapper functions for getting and setting the driver data using platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev, so we can directly pass a struct platform_device. Signed-off-by:Jingoo Han <jg1.han@samsung.com> Acked-by:
Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by:
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Wei Yongjun authored
Fix to return a negative error code instead of 0 when we cannot get IRQ source by platform_get_irq(), as done elsewhere in this function. Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by:
Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by:
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Wei Yongjun authored
Fix to return a negative error code in the gpio_to_irq() error handling case instead of 0, as done elsewhere in this function. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
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Jaehoon Chung authored
At Interrupt status register, Bit9 is Data Read Timeout. But we used macro name as the DTO. It could be confused with the Data Transfer Over(DTO)-Bit[3]. It's clearly that is changed the DRTO instead of DTO. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Acked-by:
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Fabio Estevam authored
Since commit ab78029e (drivers/pinctrl: grab default handles from device core), we can rely on device core for handling pinctrl. So remove devm_pinctrl_get_select_default() from the driver. Signed-off-by:
Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by:
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Yuvaraj Kumar C D authored
With the new eMMC5.1 spec, there is a new EXT_CSD register with the revision number(EXT_CSD_REV) 7. This patch updates the check for ext-csd.rev number as 7. Signed-off-by:
Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by:
Yuvaraj Kumar C D <yuvaraj.cd@samsung.com> Reviewed-by:
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Barry Song authored
With device core now able to setup the default pin configuration, the call to devm_pinctrl_get_select_default can be removed. And the pin configuration code based on the deprecated Samsung specific gpio bindings is also removed. Acked-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Barry Song <Baohua.Song@csr.com> Signed-off-by:
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Simon Baatz authored
Instead of parsing the DT binding on our own, use the standard parser mmc_of_parse(), introduced by commit 6c56e7a0. Signed-off-by:
Simon Baatz <gmbnomis@gmail.com> Tested-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Simon Baatz authored
Signed-off-by:
Stephen Warren <swarren@nvidia.com> Signed-off-by:
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Simon Baatz authored
Signed-off-by:
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Simon Baatz authored
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