It allows gerneral purpose partitions in MMC Device.  And I try to simply
make mmc_blk_alloc_parts using mmc_part structure suggested by Andrei
Warkentin.  After patching, we see general purpose partitions like this:
> cat /proc/partitions
          179 0 847872 mmcblk0
          179 192 4096 mmcblk0gp3
          179 160 4096 mmcblk0gp2
          179 128 4096 mmcblk0gp1
          179 96  1052672 mmcblk0gp0
          179 64  1024 mmcblk0boot1
          179 32  1024 mmcblk0boot0
Signed-off-by: NNamjae Jeon <linkinjeon@gmail.com>
Acked-by: NAndrei Warkentin <awarkentin@vmware.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

f39b2dd9 ("mmc: core: Bus width testing needs to handle suspend/resume")
added code to only compare read-only ext_csd fields in bus width testing
code, yet it's comparing some fields that are never set.

The affected fields are ext_csd.raw_erased_mem_count and
ext_csd.raw_partition_support.
Signed-off-by: NAndrei Warkentin <andrey.warkentin@gmail.com>
Acked-by: NPhilip Rakity <prakity@marvell.com>
Cc: <stable@kernel.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Since commit [e58aa3d2: genirq: Run irq handlers with interrupts
disabled], we run all interrupt handlers with interrupts disabled
and we even check and yell when an interrupt handler returns with
interrupts enabled (see commit [b738a50a: genirq: Warn when handler
enables interrupts]).

So now this flag is a NOOP and can be removed.
Signed-off-by: NYong Zhang <yong.zhang0@gmail.com>
Acked-by: NKishore Kadiyala <kishore.kadiyala@ti.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

Intel Medfield platform blocks access to eMMC boot partitions which
results in switch errors.  Since there is no access, mmcboot0/1
devices should not be created.  Add a host capability to reflect that.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

In the case of a switch error, do not update partition config as though
the switch succeeded, and ensure blk_end_request is called on the
failed request.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NAndrei Warkentin <andrey.warkentin@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds the power class selection feature available for mmc
versions 4.0 and above.  During the enumeration stage before switching
to the lower data bus, check if the power class is supported for the
current bus width. If the power class is available then switch to the
power class and use the higher data bus. If power class is not supported
then switch to the lower data bus in a worst case.
Signed-off-by: NGirish K S <girish.shivananjappa@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Reviewed-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Replace setup("fail_mmc_request") and faulty "ifdef KERNEL" with
a simple module_param(). The module param mmc_core.fail_request
may be used to set the fault injection attributes during boot time
or module load time.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Reviewed-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

mmc_core module needs to use setup_fault_attr() in order
to set fault injection attributes during module load time.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Reviewed-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds the basic support for imx6q usdhc, which is a
derivative of esdhc controller.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

This is a minor fix. It makes mmc_ios_show print proper string when the
host's timing is one of the newly added UHS-I modes.
Signed-off-by: NAaron Lu <aaron.lu@amd.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Provide platforms with a simplified way to specify MMCIF DMA slave IDs in
a way, similar to SDHI and other sh_dma clients.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

For cards that support hardware reset (just eMMC), try a reset and
retry before returning an I/O error.  However this is not done for
ECC errors and is never done twice for the same operation type
(READ, WRITE, DISCARD, SECURE DISCARD) until that type of operation
again succeeds.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

MMC core provides a checking function that checks if the reset
has happended.  Add a test to use that function.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Implement eMMC hardware reset for Medfield.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add an SDHCI operation for hardware reset and connect it to the
host controller operation.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

eMMC's may have a hardware reset line.  This patch provides a
host controller operation to implement hardware reset and
a function to reset and reinitialize the card.  Also, for MMC,
the reset is always performed before initialization.

The host must set the new host capability MMC_CAP_HW_RESET
to enable hardware reset.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The error condition indicates that mmci_post_request() should cleanup
after the mmci_pre_request(). In this case the resources allocated by
device_prep_slave_sg() are freed by calling dmaengine_terminate_all().
dma_unmap_sg() should always be performed if the host_cookie is set.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The err condition in post_req() is set to undo a call made to pre_req()
that hasn't been started yet.  The err condition is not set if an MMC
request returns an error.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Earlier all cards where initiated with bus mode set as OPENDRAIN, and then
later switched to PUSHPULL. According to the MMC/SD/SDIO specifications
only MMC cards use OPENDRAIN during init. For both SD and SDIO the bus
mode shall be PUSHPULL before attempting to init the card.

The consequence of having incorrect bus mode can lead to not being able
to detect the card. Therefore the default behavior have now been changed
to PUSHPULL in mmc_power_up, and will only be temporarily switched when
trying to attach or init a MMC card.
Signed-off-by: NStefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: NUlf HANSSON <ulf.hansson@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Adds a quirk which can be turned on for SDIO devices that do not support
512 byte requests in byte mode during CMD53. These requests will always
be sent in block mode instead.

This patch also enables this quirk for ST-Ericsson CW1200 WLAN device.
Signed-off-by: NStefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: NUlf HANSSON <ulf.hansson@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NTanmay Upadhyay <tanmay.upadhyay@einfochips.com>
Acked-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

During a rescan operation mmc_attach(sd|mmc|sdio) functions are
called. The error handling in these function can trigger a detach
of the bus, which also meant a power off. This is not notified by
the rescan operation which then continues to the next attach function.

If a power off has been done, the framework must never send any
new commands to the host driver, without first doing a new power up.
This will most likely trigger any host driver to hang.

Moving power off out of detach and instead handle power off
separately when it is actually needed, solves the issue.
Signed-off-by: NUlf Hansson <ulf.hansson@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Cc: <stable@kernel.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Currently if card_power_gpio is passed from platform data, it is acquired
and its value is either set or reset. After that we overwrite it with 1,
which is not required.

So, this patch removes the extra line which sets its value.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Freescale eSDHC registers only support 32-bit accesses, this patch
ensures that all Freescale eSDHC register accesses are 32-bit.
Signed-off-by: NXu lei <B33228@freescale.com>
Signed-off-by: NRoy Zang <tie-fei.zang@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Acked-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Put MMC to sleep if it supports SLEEP/AWAKE (CMD5) in the mmc suspend
so that Vcc (NAND core) can be cut to minimize power consumption.
eMMC put into SLEEP can respond to CMD0 or H/W reset or CMD5.
Current implemention on resume from suspend relies on CMD0 in
mmc_init_card to get out of SLEEP mode.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Acked-by: NVenkatraman S <svenkatr@ti.com>
Reviewed-by: NSubhash Jadavani <subhashj@codeaurora.org>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The default controller configuration which was previously setup by
platform helper functions is moved into the driver.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Stress-testing the runtime power management of libertas_sdio
through a rmmod/insmod loop revealed that it is quite easy to
cause an ETIMEDOUT failure in mmc_sdio_power_restore() leading to:
   libertas_sdio: probe of mmc1:0001:1 failed with error -16

Experimentation shows that a very short delay (100us) is needed in
the power down path before the card can be successfully booted again.
We know that this setup is lacking poweroff clamps on the card's power
lines, but as only a short delay is needed, apply this unconditionally.
Also bump up to 1ms sleep for extra legroom.
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The previous patch which implemented a DT binding for sdhci-tegra did not
allow all platform data fields to be initialized from DT. The following
were missing:

is_8bit: Implemented by this patch.

pm_flags: Not implemented yet. There are no mainline users of this field.
  I'm not quite sure what it's for, and hence how to represent this
  in DT; the value ends up being assigned to host->mmc->pm_caps.

While we're at it, fix the binding documentation to refer to "SD/MMC"
instead of "eSDHC", since that's the correct name; "eSDHC" was cut/paste
from the Freescale binding docs.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The Patch adds the support for SDIO interrupts for all slots.
It includes enabling of SDIO interrupts through dw_mci_enable_sdio_irq
and the handling of the slot specific interrupts in the Interrupt Service
Routine.
Signed-off-by: NShashidhar Hiremath <shashidharh@vayavyalabs.com>
Acked-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

If DMA resource is not available then SDCC driver
should atleast work in PIO data transfer mode.
Signed-off-by: NSubhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Intialize busclk_timer before it is accessed in probe.
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Not all targets have IRQ1 line routed from the SD controller to
the processor. So we cannot rely on IRQ1 for PIO interrupts.
This patch moves all PIO interrupts to IRQ0 and enables the PIO
mode.
Signed-off-by: NMurali Palnati <palnatim@codeaurora.org>
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

On some targets, MCI_IRQ_MASK1 is not routed to the MSM in which
case only "cmd_irq" must be used even for PIO. With this change,
all the targets will use only "cmd_irq" for both CMD and PIO.
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

For clocks that support rates which can be set (most clocks other
than _pclk AHB clocks), a rate must be set using clk_set_rate()
before the clock is enabled for the first time with clk_enable().
Subsequent calls to clk_enable() need not be preceded with the
clk_set_rate() calls unless we wish to change the clock rate that
is set previously.

SDC host->clk is currently enabled without setting the clock rate
even once. This patch fixes this, by ensuring that the clock rate
for this clock is first set before enabling the clock.
Signed-off-by: NMurali Palnati <palnatim@codeaurora.org>
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

This allows boards with non-standard sdio cards to fill the CIS/CCCR data.
It is particularly important for old msm72k boards using wl1251.
Also drop the obsolete embedded_sdio_data structure from the header
as it was intended to surve a similiar purpose but was not implemented.
Signed-off-by: NAlexander Tarasikov <alexander.tarasikov@gmail.com>
Acked-by: NSahitya Tummala <stummala@codeaurora.org>
[davidb: minor formatting cleanup]
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The use of && instead of || caused a NULL pointer dereference if
gpio setup was not passed via platform data
Signed-off-by: NAlexander Tarasikov <alexander.tarasikov@gmail.com>
Acked-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

This allows specific (non-multiplexed) IRQ handlers to be used.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: NMagnus Damm <magnus.damm@gmail.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NChris Ball <cjb@laptop.org>

Allow named IRQs to use corresponding specific handlers. If named IRQs are
used, at least an "sdcard" IRQ has to be specified by the platform. If
names are not used, an arbitrary number of IRQs can be provided by the
platform, in which case the generic ISR will be used for each of them.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NMagnus Damm <magnus.damm@gmail.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>
[g.liakhovetski@gmx.de: style and typo corrections, platform data check]
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>