This change uses the appropriate _cansleep or non-sleeping API for
reading GPIO card detect state. This allows users with GPIOs that
never sleep to avoid a warning when certain quirks are present.

The sdhci controller has an SDHCI_QUIRK_NO_CARD_NO_RESET, which
indicates that a controller will not reset properly if no card is
inserted. With this quirk enabled, mmc_get_cd_gpio is called in
several places with a spinlock held and interrupts disabled.
gpiod_get_raw_value_cansleep is not happy with this situation,
and throws out a warning.

For boards that a) use controllers that have this quirk, and b) wire
card detect up to a GPIO that doesn't sleep, this is a spurious warning.
This change silences that warning, at the cost of pushing this problem
down to users that have sleeping GPIOs and controllers with this quirk.
Signed-off-by: NEvan Green <evgreen@chromium.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

I noticed below error msg with sdhci-pxav3 on some berlin platforms:

[.....] sdhci-pxav3 f7ab0000.sdhci failed to add host

It is due to getting related vmmc or vqmmc regulator returns
-EPROBE_DEFER. It doesn't matter at all but it's confusing.

>From another side, if driver probing fails and the error number isn't
-EPROBE_DEFER, the core will tell us something as below:

[.....] sdhci-pxav3: probe of f7ab0000.sdhci failed with error -EXX

So it's not necessary to emit error msg if sdhci_add_host() fails. And
some other sdhci host drivers also have this issue, let's fix them
together.
Signed-off-by: NJisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Add a new define for the sd default speed 25MHz case
Signed-off-by: NYinbo Zhu <yinbo.zhu@nxp.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Move the calls to ->prepare_hs400_tuning(), from mmc_retune() into
mmc_hs400_to_hs200(), as it better belongs there, rather than being generic
to all type of cards.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>

match_string() returns the index of an array for a matching string,
which can be used intead of open coded variant.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Hu Ziji <huziji@marvell.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc@vger.kernel.org
Signed-off-by: NYisheng Xie <xieyisheng1@huawei.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Use sg_copy_{from,to}_buffer to bounce buffer and kmap_atomic to map the
scatterlist entry before using it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Pass the scatterlist on to the USB subsystem instead of expecting a
kernel virtual address.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Use kmap_atomic to map the scatterlist entry before using it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This handles highmem pages, and also cleans up the code.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This handles highmem pages, and also cleans up the code.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

It's pointless to switch and trace partition type if the current
selected device partition is the same with that one. Moreover, cycled
claiming host associated with mmc_blk_part_switch() could make
mmc_blk_remove() end up waiting for grabbing the context if it's
occupied, which lead requests could still hit the low-level drivers,
if an asynchronous unbind for host drivers happened, as the card hasn't
been set removed in the remove path.

So a simple dd in background:
dd if=/dev/mmcblk0 of=/dev/null bs=512k count=100000 &

and doing unbind then:
echo fe320000.dwmmc > /sys/bus/platform/drivers/dwmmc_rockchip/unbind

could make the console stuck for quite a while depending on the
numbers of requests.
Suggested-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

The SDHCI_QUIRK2_HOST_OFF_CARD_ON is needed for the driver to
properly reset the host controller (reset all) on initialization
after exiting deep sleep.
Signed-off-by: NCorneliu Doban <corneliu.doban@broadcom.com>
Signed-off-by: NScott Branden <scott.branden@broadcom.com>
Reviewed-by: NRay Jui <ray.jui@broadcom.com>
Reviewed-by: NSrinath Mannam <srinath.mannam@broadcom.com>
Fixes: c833e92b ("mmc: sdhci-iproc: support standard byte register accesses")
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

When the host controller accepts only 32bit writes, the value of the
16bit TRANSFER_MODE register, that has the same 32bit address as the
16bit COMMAND register, needs to be saved and it will be written
in a 32bit write together with the command as this will trigger the
host to send the command on the SD interface.
When sending the tuning command, TRANSFER_MODE is written and then
sdhci_set_transfer_mode reads it back to clear AUTO_CMD12 bit and
write it again resulting in wrong value to be written because the
initial write value was saved in a shadow and the read-back returned
a wrong value, from the register.
Fix sdhci_iproc_readw to return the saved value of TRANSFER_MODE
when a saved value exist.
Same fix for read of BLOCK_SIZE and BLOCK_COUNT registers, that are
saved for a different reason, although a scenario that will cause the
mentioned problem on this registers is not probable.

Fixes: b580c52d ("mmc: sdhci-iproc: add IPROC SDHCI driver")
Signed-off-by: NCorneliu Doban <corneliu.doban@broadcom.com>
Signed-off-by: NScott Branden <scott.branden@broadcom.com>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Remove hard coded mmc cap 1.8v from platform data as it is board specific.
The 1.8v DDR mmc caps can be enabled using DTS property for those
boards that support it.

Fixes: b17b4ab8 ("mmc: sdhci-iproc: define MMC caps in platform data")
Signed-off-by: NSrinath Mannam <srinath.mannam@broadcom.com>
Signed-off-by: NScott Branden <scott.branden@broadcom.com>
Reviewed-by: NRay Jui <ray.jui@broadcom.com>
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

In commit 97548575 ("mmc: block: Convert RPMB to a character device") a
new function `mmc_rpmb_ioctl` was added. The final return is simply
returning a value of `0` instead of propagating the correct return code.

Discovered during a compilation with W=1, silence the following gcc warning

drivers/mmc/core/block.c:2470:6: warning: variable ‘ret’ set but not used
[-Wunused-but-set-variable]
Signed-off-by: NMathieu Malaterre <malat@debian.org>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>
Fixes: 97548575 ("mmc: block: Convert RPMB to a character device")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Trigger the reset line of the mmc controller while probing, if available.
The reset should be optional for now, at least until all related DT nodes
have the reset property.
Reviewed-by: NKevin Hilman <khilman@baylibre.com>
Signed-off-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Add the reset to the documentation of the meson-gx mmc controller
bindings.
Reviewed-by: NKevin Hilman <khilman@baylibre.com>
Signed-off-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This commit adds "mellanox,bluefield-dw-mshc" for dwmmc driver
extension on Mellanox BlueField SoC platform.
Signed-off-by: NLiming Sun <lsun@mellanox.com>
Reviewed-by: NDavid Woods <dwoods@mellanox.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This commit adds extension to the dw_mmc driver for Mellanox BlueField
SoC. It updates the UHS_REG_EXT register to bring up the eMMC card on
this SoC.
Signed-off-by: NLiming Sun <lsun@mellanox.com>
Reviewed-by: NDavid Woods <dwoods@mellanox.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

The hard-coded 10ms delay in mmc_power_up came from
commit 79bccc5a ("mmc: increase power up delay"), which said "The TI
controller on Toshiba Tecra M5 needs more time to power up or the cards
will init incorrectly or not at all." But it's too engineering solution
for a special board but force all platforms to wait for that long time,
especially painful for mmc_power_up for eMMC when booting.

However, it's added since 2009, and we can't tell if other platforms
benefit from it. But in practise, the modern hardware are most likely to
have a stable power supply with 1ms after setting it for no matter PMIC
or discrete power. And more importnatly, most regulators implement the
callback of ->set_voltage_time_sel() for regulator core to wait for
specific period of time for the power supply to be stable, which means
once regulator_set_voltage_* return, the power should reach the the
minimum voltage that works for initialization. Of course, if there
are some other ways for host to power the card, we should allow them
to argue a suitable delay as well.

With this patch, we could assign the delay from firmware, or we could
assigne it via ->set_ios() callback from host drivers.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

post-power-on-delay-ms woule be reused to substitute the hard-coded 10ms
delay waiting for power supply to be stable, specificed by individual
platform/board. Default to 10ms as before, if no available.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch adds r8a77965 support in SDHI.
Signed-off-by: NMasaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
Tested-by: NSimon Horman <horms+renesas@verge.net.au>
Tested-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

A redundant return statement is removed from
tegra_sdhci_set_uhs_signaling(). The function returns void and the
return does not affect the control flow of the function.
Signed-off-by: NAapo Vienamo <aapo.vienamo@iki.fi>
Acked-by: NThierry Reding <treding@nvidia.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

MMC_CORE_TIMEOUT_MS isn't being used no more, let's drop it.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NMichał Pecio <michal.pecio@gmail.com>

Instead of using a fixed 3s timeout for commands with R1B responses,
convert to use the per request calculated busy timeout from the mmc core.

This is needed to cope with requests that requires longer timeout, for
example erase/discard commands.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NMichał Pecio <michal.pecio@gmail.com>

Instead of having to return -EINVAL when requested to send SDIO specific
commands, let's set MMC_CAP2_NO_SDIO as it completely prevents them.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NMichał Pecio <michal.pecio@gmail.com>

Let's implement the ->sw_reset() bus ops to allow SDIO func drivers, in
particular, to make a SW reset without doing a full power cycle of the SDIO
card.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>

Move the corresponding code for setting the initial signal voltage, from
mmc_power_up() into a new function, mmc_set_initial_signal_voltage().

Make the function internally available to the mmc core, as to allow the
following changes to make use of it.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>

It's rather common that a firmware is loaded into an SDIO func device
memory, by the corresponding SDIO func driver during ->probe() time.

However, to actually start running the new firmware, sometimes a soft reset
(no power cycle) and a re-initialization of the card is needed. This is for
example the case with the Espressif ESP8089 WiFi chips, when connected to
an SDIO interface.

To cope with this scenario, let's add a new exported function,
mmc_sw_reset(), which may be called when a soft reset and re-initialization
of the card are needed.

The mmc_sw_reset() is implemented on top of a new bus ops callback, similar
to how the mmc_hw_reset() has been implemented.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>

The bus ops ->reset() executes a full HW reset of the card, as the calling
function mmc_hw_reset() also indicates by its name. Let's convert to follow
the similar names, for both the bus ops callback and for the corresponding
bus ops functions, as to clarify the purpose of code.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>

The mmc_sdio_init_card() function has a couple of callers. In the
re-initialization cases, some additional reset commands are issued before
mmc_sdio_init_card() is called. As these additional reset commands are the
same, let's move these into a new static function, mmc_sdio_reinit_card()
and call mmc_sdio_init_card() from there. In this way we avoid the open
coding.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: NShawn Lin <shawn.lin@rock-chips.com>

Merge immutable branch for sdhci-omap to add UHS/HS200 mode support.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Allow to use tunable delay before detecting card after card is inserted,
which either comes from firmware node, or comes from debounce value
passed on to mmc_gpiod_request_cd(). If the platform doesn't support
debounce, then we fall back to use the debounce period as the delay,
otherwise, it behaves the same as before that a HW debounce(if set) plus
a 200ms hardcode delay before detecting the card.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

cd-gpios uses a fixed delay, 200ms, before detecting card after the card
is inserted. 200ms doesn't work for some platforms, so some host drivers
added their own properties for parsing that from DT, for instance,
dw_mmc and pxamci. That being said, it should also be tunable when using
cd-gpios.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

commit 8d20b2ea ("mmc: sdhci_omap: Add support to set
IODELAY values") stored IODelay values for all MM/SD modes
in pinctrl_state structure member of sdhci_omap_host. However for
DDR mode it gets IODelay values only for 1.8v DDR mode. Since some of
the platforms which uses sdhci-omap has IO lines connected to 3.3v,
get IODelay values for 3.3v DDR mode.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Add pinctrl binding rquired to get the mux mode and IODelay
values from devicetree.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Add sdhci_omap_enable_sdio_irq to set CTPL and CLKEXTFREE bits in
MMCHS_CON register required to detect asynchronous card interrupt
on DAT[1].
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Add support for the new compatible added specifically to support
k2g's MMC/SD controller.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>