Add support for DDR mode which may be used for the ux500v2 variant.
Corresponding capabilities to enable the DDR support must be set in
the platform struct to enable the functionality.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Not all the architectures have readsl/writesl,
use the more portable ioread32_rep/iowrite32_rep functions instead.
Signed-off-by: NDavide Ciminaghi <ciminaghi@gnudd.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

sdhci-acpi supports ACPI devices which have compatibility ID
PNP0D40, however it is not possible to know if those devices
will all work correctly with runtime-pm, so that must be configured
per hardware ID.

For INT33C6, several related quirks, capabilities and flags are set:

	MMC_CAP_NONREMOVABLE
		The SDIO card will never be removable

	SDHCI_ACPI_RUNTIME_PM
		Enable runtime-pm of the host controller

	MMC_CAP_POWER_OFF_CARD
		Enable runtime-pm of the SDIO card

	MMC_PM_KEEP_POWER
		SDIO card has the capability to remain powered up
		during system suspend

	SDHCI_QUIRK2_HOST_OFF_CARD_ON
		Always do a full reset during system resume
		because the card may be already initialized having
		not been powered off.

Wake-ups from the INT33C6 host controller are not supported, so the
following capability must *not* be set:

	MMC_PM_WAKE_SDIO_IRQ
		Enable wake on card interrupt
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NChris Ball <cjb@laptop.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

Extracting a part of the SDHCI card tasklet into a .card_event()
implementation allows SDHCI hosts to use generic card-detection
services, e.g. the GPIO slot function.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

'sc' is used only when CONFIG_PM_RUNTIME is defined. Hence define it
conditionally.

Silences the following warning:
drivers/mmc/host/sdhci-s3c.c: In function ‘sdhci_s3c_notify_change’:
drivers/mmc/host/sdhci-s3c.c:378:20: warning: unused variable ‘sc’ [-Wunused-variable]
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The Ricoh SDHCI controllers support Highspeed clocks as evident from
the ricoh_mmc_probe_slot() settings. Hence, SDHCI_CAN_DO_HISPD needs
to be set to enable SDIO client drivers to set/enable high speed clock
settings
Signed-off-by: NMadhvapathi Sriram <Madhvapathi.Sriram@csr.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This commit taken from Rabeeh's Cubox kernel and re-worked for DT;
Sebastian Hasselbrath is believed to be the original author.

Some Cuboxes require a GPIO for card detection; this implements the
optional GPIO support for card detection.  This GPIO is logic 0 for
card inserted.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NChris Ball <cjb@laptop.org>

We need to use the two-stage initialization for sdhci-pltfm if we're
going to do anything extra at initialization time.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NChris Ball <cjb@laptop.org>

Use devm_clk_get() rather than clk_get() to make cleanup paths more simple.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NChris Ball <cjb@laptop.org>

A-003500: False ADMA Error might be reported when ADMA is used for
multiple block read command with Stop at Block Gap. If PROCTL[SABGREQ]
is set when the particular block's data is received by the System side
logic before entire block (with CRC) data is received by the SD side
logic, and also if ADMA descriptor line is fetched at the same time,
then DMA engine might report false ADMA error. eSDHC might not be able
to Continue (PROCTL[CREQ]=1) after Stop at Block Gap.
This issue will impact the eSDHC IP VVN2.3.
Signed-off-by: NHaijun Zhang <Haijun.Zhang@freescale.com>
Signed-off-by: NJerry Huang <Chang-Ming.Huang@freescale.com>
Acked-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

ctype is using 1-bit buswidth mode by default.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

To ensure the stable clock need to enable before set the
DW_MMC_CARD_NEED_INIT flag.  If set DW_MMC_CARD_NEED_INIT flag,
wait for 80-clock before first command after power-up.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NSeungwon Jeon <tgih.jun@samsung.com>
Acked-by: NWill Newton <will.newton@imgtec.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Use managed device resource functions for easy handling.
This makes driver simpler in the routine of error and exit.
Signed-off-by: NSeungwon Jeon <tgih.jun@samsung.com>
Acked-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

MMCIF only uses one clock, all ARM and SuperH platforms register MMCIF
clock lookup entries with no connection ID, hence it can be dropped in
the driver too.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NChris Ball <cjb@laptop.org>

SDHI only uses one clock, all ARM and SuperH platform register SDHI clock
lookup entries with no connection ID, hence it can be dropped in the
driver too.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NChris Ball <cjb@laptop.org>

During its probing the SDHI driver prints out the clock frequency, but
does it wrongly, always reporting 0Hz. Use the MMC host frequency value
to fix this issue.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NChris Ball <cjb@laptop.org>

Use devm_kzalloc, devm_gpio_request_one and devm_request_irq to make
cleanup path simpler.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The OLPC XO-1.75 laptop includes a SDHCI controller which is 1.8v
capable, and it truthfully reports so in its capabilities. This
alternate voltage is used for driving new "UHS-I" SD cards at their
full speed.

However, what the controller doesn't know is that the motherboard
physically doesn't have a 1.8v supply available, so attempting to
switch to the 1.8v level will result in a situation that cannot be
recovered from without physically replugging the SD card.

Add a device tree flag that can be used on systems like these,
and hook it up to the equivalent SDHCI quirk.
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Reviewed-by: NPhilip Rakity <prakity@nvidia.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The OLPC XO-1.75 laptop includes a SDHCI controller which is 1.8v
capable, and it truthfully reports so in its capabilities. This
alternate voltage is used for driving new "UHS-I" SD cards at their
full speed.

However, what the controller doesn't know is that the motherboard
physically doesn't have a 1.8v supply available.

Add a quirk so that systems such as this one can override disable
1.8v support, adding support for UHS-I cards (by running them at
3.3v).

This avoids a problem where the system would first try to run the
card at 1.8v, fail, and then not be able to fully reset the card
to retry at the normal 3.3v voltage.

This is more appropriate than using the MISSING_CAPS quirk, which
is intended for cases where the SDHCI controller is actually lying
about its capabilities, and would force us to somehow override both
caps words from another source.
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Reviewed-by: NPhilip Rakity <prakity@nvidia.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add missing usb_put_dev on failure path in vub300_probe().

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NMarina Makienko <makienko@ispras.ru>
Signed-off-by: NChris Ball <cjb@laptop.org>

clk_{un}prepare is mandatory for platforms using common clock
framework. Because for SPEAr we don't do anything in clk_{un}prepare()
calls, just call them once in probe/remove.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

SPEAr sdhci driver expects the clock to be set to 50 MHz for proper
functioning.  This patch sets clk to 50 MHz in probe.
Signed-off-by: NVipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds support for pin configuration using pinctrl subsystem
to the sdhci-s3c driver.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The set of GPIO pins used by sdhci-s3c driver varies between
configurations, such as card detect method, pinctrl availability, etc.
This overly complicates the code requesting and freeing GPIO pins, which
must check which pins are used, when freeing them.

This patch modifies the sdhci-s3c driver to use devm_gpio_request to
free requested pins automatically after unbinding the driver.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The IP versions older than 2.3 didn't support commands with busy
response which expect the TC bit set. But after the VVN2.3, eSDHC
IP has supported it.
Signed-off-by: NJerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The third argument for of_get_property() is a pointer, hence pass
NULL instead of 0.

Fixes the following sparse warning:
sdhci-s3c.c:452:48: warning: Using plain integer as NULL pointer
sdhci-s3c.c:457:52: warning: Using plain integer as NULL pointer
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Define the most frequently used bitmasks of the Interrupt Enable /
Interrupt Status register with consistent naming ( with _EN suffix).

Use meaningful concatenation of bitfields for INT_EN_MASK, which shows
which interrupts are enabled by default.  No functional changes.
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Fatal errors for the driver are not reported when just error debug
is enabled. Convert selected dev_dbg to dev_err for accurate error
reporting.
Reported-by: NBenoit Cousson <b-cousson@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

prepare() is supposed to prevent new children from being registered.
On the MMC subsystem, children (new cards) registration starts with
the card detect IRQ.

Move card detect IRQ disabling to prepare() so that no new cards
will be registered while we're trying to suspend.

Likewise, move card detect IRQ enabling to complete() so we only
try to register new children after our MMC IP is back up.
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

HSMMC IP on AM33xx need a special setting to handle High-speed cards.
Other platforms like TI81xx, OMAP4 may need this as-well. This depends
on the HSMMC IP timing closure done for the high speed cards.

From AM335x TRM (SPRUH73F - 18.3.12 Output Signals Generation):

The MMC/SD/SDIO output signals can be driven on either falling edge or
rising edge depending on the SD_HCTL[2] HSPE bit. This feature allows
to reach better timing performance, and thus to increase data transfer
frequency.

There are few pre-requisites for enabling the HSPE bit
- Controller should support High-Speed-Enable Bit and
- Controller should not be using DDR Mode and
- Controller should advertise that it supports High Speed in
  capabilities register and
- MMC/SD clock coming out of controller > 25MHz
Signed-off-by: NHebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Update error code to cmd->error for commands with response_busy and no data.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Avoid soft reset of command internal state machine on data errors.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

ae4bf788 ("mmc: omap_hsmmc: consolidate error report handling of HSMMC
IRQ") sets both end_cmd and end_trans to 1.

Setting end_cmd to 1 for Data Timeout/CRC leads to NULL pointer dereference of
host->cmd as the command complete has previously been handled.
Set end_cmd only in case of command Timeout/CRC.

Moreover host->cmd->error should not be updated on data error case, only
host->data->error needs to be updated.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NVenkatraman S <svenkatr@ti.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add dt-based retrieval of host sdio pm capabilities. Based on
the dt based discovery do a bus init in the resume function.
Signed-off-by: NOlof Johansson <olofj@chromium.org>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add support for optional pm capabilities such as MMC_PM_KEEP_POWER
and MMC_PM_WAKE_SDIO_IRQ.
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Acked-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: NKevin Liu <kliu5@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

For regulator vmmc/vmmcq, use voltage range as below
3.3v/3.0v: (2.7v, 3.6v)
1.8v: (1.7v, 1.95v)
Original code uses the precise value which may fail in regulator
driver if it does NOT support the precise voltage.
Signed-off-by: NJialing Fu <jlfu@marvell.com>
Signed-off-by: NKevin Liu <kliu5@marvell.com>
Tested-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds support for the SD/MMC host controller found
on Wondermedia 8xxx series SoCs, currently supported under
arm/arch-vt8500.

A binding document is also included, based on mmc.txt with
additional properties.
Signed-off-by: NTony Prisk <linux@prisktech.co.nz>
Signed-off-by: NChris Ball <cjb@laptop.org>

Enable the quirk SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN since
SD_CAPABILITIES_1[15:8](BASE_FREQ) can't get correct base clock value.
It returns a fixed pre-set value like 200 on some sdhci-pxav3 based
platforms like MMP3 while return 0 on the other sdhci-pxav3 based
platforms.  So we enable the quirk and get the base clock via function
get_max_clock. Also add get_max_clock.
Reported-by: NPhilip Rakity <prakity@marvell.com>
Reviewed-by: NPhilip Rakity <prakity@Marvell.com>
Acked-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: NKevin Liu <kliu5@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

All MXS users have been converted to device tree and the board files have
been removed.

No need to keep platform data in the driver.

Also move bus_width declaration in the beggining of mxs_mmc_probe() to
avoid: 'warning: ISO C90 forbids mixed declarations and code'.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>