- 26 Oct, 2015 40 commits
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Heiko Stuebner authored
This allows the tuning code to run and use higher speeds on capable cards. Signed-off-by:
Heiko Stuebner <heiko@sntech.de> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org>
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Alexandru M Stan authored
The drive/sample clocks can be phase shifted. The drive clock could be used in a future patch to adjust hold times. The sample clock is used for tuning. Signed-off-by:
Alexandru M Stan <amstan@chromium.org> Signed-off-by:
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Alexandru M Stan authored
This algorithm will try 1 degree increments, since there's no way to tell what resolution the underlying phase code uses. As an added bonus, doing many tunings yields better results since some tests are run more than once (ex: if the underlying driver uses 45 degree increments, the tuning code will try the same angle more than once). It will then construct a list of good phase ranges (even ranges that cross 360/0), will pick the biggest range then it will set the sample_clk to the middle of that range. We do not touch ciu_drive (and by extension define default-drive-phase). Drive phase is mostly used to define minimum hold times, while one could write some code to determine what phase meets the minimum hold time (ex 10 degrees) this will not work with the current clock phase framework (which floors angles, so we'll get 0 deg, and there's no way to know what resolution the floors happen at). We assume that the default drive angles set by the hardware are good enough. If a device has device specific code (like exynos) then that will still take precedence, otherwise this new code will execute. If the device wants to tune, but has no sample_clk defined we'll return EIO with an error message. Signed-off-by:
Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by:
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Alexandru M Stan authored
Add ciu_drive, ciu_sample clocks and default-sample-phase. This will later be used by tuning code. We do not touch ciu_drive (and by extension define default-drive-phase). Drive phase is mostly used to define minimum hold times, while one could write some code to determine what phase meets the minimum hold time (ex 10 degrees) this will not work with the current clock phase framework (which floors angles, so we'll get 0 deg, and there's no way to know what resolution the floors happen at). We assume that the default drive angles set by the hardware are good enough. Signed-off-by:
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Douglas Anderson authored
We've introduced a new helper in the MMC core: mmc_regulator_set_vqmmc(). Let's use this in dw_mmc. Using this new helper has some advantages: 1. We get the mmc_regulator_set_vqmmc() behavior of trying to match VQMMC and VMMC when the signal voltage is 3.3V. This ensures max compatibility. 2. We get rid of a few more warnings when probing unsupported voltages. 3. We get rid of some non-dw_mmc specific code in dw_mmc. Signed-off-by:
Douglas Anderson <dianders@chromium.org> Signed-off-by:
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Douglas Anderson authored
This adds logic to the MMC core to set VQMMC. This is expected to be called by MMC drivers like dw_mmc as part of (or instead of) their start_signal_voltage_switch() callback. A few notes: * When setting the signal voltage to 3.3V we do our best to make VQMMC and VMMC match. It's been reported that this makes some old cards happy since they were tested back in the day before UHS when VQMMC and VMMC were provided by the same regulator. A nice side effect of this is that we don't end up on the hairy edge of VQMMC (2.7V), which some EEs claim is a little too close to the minimum for comfort. This is done in two steps. At first we try to find a VQMMC within a 0.3V tolerance of VMMC and if this is not supported by the supplying regulator we try to find a suitable voltage within the whole 2.7V-3.6V area of the spec. * The two step approach is currently necessary, as the used regulator_set_voltage_triplet(min, target, max) uses a simple implementation that just tries two basic steps: regulator_set_voltage(target, max); regulator_set_voltage(min, target); So with only one step with 2.7-3.6V borders, if a suitable voltage is a bit below VMMC, we would directly get the lowest 2.7V which some boards (like Rockchips) don't like at all. * When setting the signal voltage to 1.8V or 1.2V we aim for that specific voltage instead of picking the lowest one in the range. * We very purposely don't print errors in mmc_regulator_set_vqmmc(). There are cases where the MMC core will try several different voltages and we don't want to pollute the logs. Signed-off-by:
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Heiko Stuebner authored
We will shortly need the calculation of an ocr-bit to the actual voltage in a second place too, so move it from mmc_regulator_set_ocr to a common function mmc_ocrbitnum_to_vdd to make that possible. Signed-off-by:
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Ulf Hansson authored
MMC_CLKGATE was once invented to save power by gating the bus clock at request inactivity. At that time it served its purpose. The modern way to deal with power saving for these scenarios, is by using runtime PM. Nowadays, several host drivers have deployed runtime PM, but for those that haven't and which still cares power saving at request inactivity, it's certainly time to deploy runtime PM as it has been around for several years now. To simplify code to mmc core and thus decrease maintenance efforts, this patch removes all code related to MMC_CLKGATE. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org>
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yangbo lu authored
Signed-off-by:
Yangbo Lu <yangbo.lu@freescale.com> Signed-off-by:
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yangbo lu authored
Freescale eSDHC driver now supports both little-endian and big-endian mode eSDHC IPs for ARM and PPC. So, MMC_SDHCI_OF_ESDHC option needs to be reconfigured. Signed-off-by:
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yangbo lu authored
To support little endian eSDHC controller, we redefine both BE and LE IO accessors. In the new accessors, use ioread*/iowrite* instead of in_be32/out_be32 and will select accessors according to endian mode in probe function. Signed-off-by:
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yangbo lu authored
Signed-off-by:
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Adrian Hunter authored
Add another PCI ID for an Intel eMMC host controller. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
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Douglas Anderson authored
Let's use DIV_ROUND_CLOSEST for rounding, not just truncating division. This lets us get closer to the right rate. Before this: set_phase(86) delay_nums=26 reg[0xf000420c]=0x468 actual_degrees=83 set_phase(89) delay_nums=27 reg[0xf000420c]=0x46c actual_degrees=86 After this: set_phase(86) delay_nums=27 reg[0xf000420c]=0x46c actual_degrees=86 set_phase(89) delay_nums=28 reg[0xf000420c]=0x470 actual_degrees=90 Signed-off-by:
Stephen Boyd <sboyd@codeaurora.org> Signed-off-by:
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Douglas Anderson authored
Because of the inexact nature of the extra MMC delay elements (it's not possible to keep the phase monotonic and to also make phases (mod 90) > 70), we previously only allowed phases (mod 90) of 22.5, 45, and 67.5. But it's not the end of the world if the MMC clock phase goes non-monotonic. At most we'll be 25 degrees off. It's way better to test more phases to look for bad ones than to be 25 degrees off, because in the case of MMC really the point is to find bad phases and get as far asway from the as possible. If we get to test extra phases by going slightly non-monotonic then that might be fine. Worst case we would end up at a phases that's slight differnt than the one we wanted, but at least we'd still be quite far away from the a bad phase. Signed-off-by:
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kbuild test robot authored
drivers/mmc/host/sdhci-pci-core.c:447:1-4: WARNING: end returns can be simpified Simplify a trivial if-return sequence. Possibly combine with a preceding function call. Generated by: scripts/coccinelle/misc/simple_return.cocci CC: Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
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Ben Hutchings authored
It has no external callers. Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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Ben Hutchings authored
sdhci-pci-o2micro.c contains no initialisation and its functions are only called from shdci-pci.c, so there is no reason for it to be a separate module, let alone or for it to always be built-in. - Rename sdhci-pci.c to sdhci-pci-core.c so that the sdhci-pci module can be built from multiple source files - Add sdhci-pci-o2micro.c to it - Remove redundant exports Signed-off-by:
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Weijun Yang authored
According to hardware spec, validate DDR50 mode for SDXC. Signed-off-by:
Weijun Yang <york.yang@csr.com> Signed-off-by:
Barry Song <Baohua.Song@csr.com> Signed-off-by:
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Weijun Yang authored
CMD19 tuning is also available for DDR50 mode. Signed-off-by:
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Weijun Yang authored
As SD Specifications Part1 Physical Layer Specification Version 3.01 says, CMD19 tuning is available for unlocked cards in transfer state of 1.8V signaling mode. The small difference between v3.00 and 3.01 spec means that CMD19 tuning is also available for DDR50 mode. Signed-off-by:
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Grant Grundler authored
MMC_IOC_CMD and MMC_IOC_MULTI_CMD ioctl() code currently bails on any eMMC errors. However, in case there is any resp[] data, we should attempt to copy resp[] back to user space. The user app can then determine which command(s) failed in the MMC_IOC_MULTI_CMD case AND/OR report better diagnostics in both cases. Gwendal Grignou provided the idea and it was previously implemented and tested on v3.18 ChromeOS kernel: https://chromium-review.googlesource.com/#/c/299956Signed-off-by:Grant Grundler <grundler@chromium.org> Reviewed-by:
Hyung Taek Ryoo <hryoo@nvidia.com> Reviewed-by:
Gwendal Grignou <gwendal@chromium.org> Tested-by:
David Riley <davidriley@chromium.org> Signed-off-by:
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Shawn Lin authored
This patch add MMC_TIMING_UHS_SDR12 and MMC_TIMING_UHS_SDR25 for mmc_ios_show to show the ios->timing if mmc card runs under these two modes. Signed-off-by:
Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by:
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Hans de Goede authored
Some sdio wifi modules have not been working reliable with the sunxi-mmc host code. This turns out to be caused by starting new io-rw commands while the card signals that it is still busy processing a previous command. This commit adds card-busy detection to the sunxi-mmc driver which together with recent core changes to check card-busy before starting io-rw commands fixes the wifi reliability issues on the Cubietruck and other sunxi boards using sdio wifi. Reported-by:
Eugene K <sigintmailru@gmail.com> Suggested-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Hans de Goede authored
Some sdio wifi chips will not work properly if we try to start new sdio-rw requests while the device is signalling that it is busy. Signed-off-by:
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Hans de Goede authored
Add a helper function to check if an opcode is a sd-io-rw-* opcode. Signed-off-by:
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Jon Hunter authored
Certain eMMC devices allow vendor specific device information to be read via a sequence of vendor commands. These vendor commands must be issued in sequence and an atomic fashion. One way to support this would be to add an ioctl function for sending a sequence of commands to the device atomically as proposed here. These multi commands are simple array of the existing mmc_ioc_cmd structure. The structure passed via the ioctl uses a __u64 type to specify the number of commands (so that the structure is aligned on a 64-bit boundary) and a zero length array as a header for list of commands to be issued. The maximum number of commands that can be sent is determined by MMC_IOC_MAX_CMDS (which defaults to 255 and should be more than sufficient). This based upon work by Seshagiri Holi <sholi@nvidia.com>. Signed-off-by:
Seshagiri Holi <sholi@nvidia.com> Signed-off-by:
Jon Hunter <jonathanh@nvidia.com> Signed-off-by:
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Yangbo Lu authored
Enable interrupt mode to detect card instead of polling mode for ls1021a by removing the quirk SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data transferring performance and avoid the call trace caused by polling card status sometime. Signed-off-by:
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Javier Martinez Canillas authored
The simple power sequence provider sets a value for multiple GPIOs in one go so it is better to use the API already provided by the GPIO descriptor API instead of open coding the same logic. Signed-off-by:
Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by:
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Chaotian Jing authored
Add MMC_CAP_RUNTIME_RESUME support to save resume time Drop unnecessary SDC_ARG write Signed-off-by:
Chaotian Jing <chaotian.jing@mediatek.com> Signed-off-by:
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Shawn Lin authored
This patch add ios->drv_type for mmc_ios_show to show the card's driver type. Signed-off-by:
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Luis de Bethencourt authored
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by:
Luis de Bethencourt <luisbg@osg.samsung.com> Acked-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
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Luis de Bethencourt authored
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by:
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Tobias Klauser authored
Use of_property_read_u32 instead of of_get_property with return value checks and endianness conversion. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Javier Martinez Canillas authored
Drivers needs to export the OF id table and this be built into the module or udev won't have the necessary information to autoload the driver module when the device is registered via OF. Signed-off-by:
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Dan Carpenter authored
The goto is correct and the unreachable "return -EINVAL" should be removed. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by:
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Haibo Chen authored
sdhci_init() will clear all irqs and set the needed irqs. So logically sdhci_init() should be called before request irq. If not, some irqs may be triggled and handled wrongly. Take the following into consideration, after request irq, if SDIO card interrupt enabled, a sd card in the sd slot will trigger a mass of interrupt(SDHCI_INT_CARD_INT), because at this time, the vmmc-regulator still not restore, no voltage supply for the sd card, so the pin of data0~data3 change and keep low, interrupt(SDHCI_INT_CARD_INT) will rise up ceaselessly. Due to we already reguest irq, system will be busy in handling this endless irq, can't response to other event. So we should call sdhci_init() before request irq in sd resume. Signed-off-by:
Haibo Chen <haibo.chen@freescale.com> Signed-off-by:
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Javier Martinez Canillas authored
The driver prints if the data width is 8-bit but it's using a binary OR instead of a binary AND so it will always report as "is_8bit=Y" regardless of the flags in host->mmc->caps. Signed-off-by:
Ray Jui <rjui@broadcom.com> Signed-off-by:
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Javier Martinez Canillas authored
The gpiod_get() function expands to gpiod_get_index() with index 0 so it's better to use it since is easier to read and more concise. Signed-off-by:
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Ulf Hansson authored
As there are no users of the __mmc_switch() API, except for the mmc core itself, let's convert it from an exported function into an internal. Signed-off-by:
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