GitHub/moto-9609/android_kernel_motorola_exynos9610.git
8 years agommc: sdhci: prepare DMA address/size quirk handling consolidation
Russell King [Tue, 26 Jan 2016 13:41:09 +0000 (13:41 +0000)]
mmc: sdhci: prepare DMA address/size quirk handling consolidation

Prepare to consolidate the DMA address/size quirk handling into one
single loop.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: cleanup DMA un-mapping
Russell King [Tue, 26 Jan 2016 13:40:42 +0000 (13:40 +0000)]
mmc: sdhci: cleanup DMA un-mapping

The patch "mmc: sdhci: plug DMA mapping leak on error" added
un-mapping logic to sdhci_tasklet_finish() where it is always
called, thereby preventing the mapping leaking.

Consequently the un-mapping code in sdhci_finish_data() is no
longer needed.  Remove it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ Split from original "mmc: sdhci: plug DMA mapping leak on error" patch ]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: clean up host cookie handling
Russell King [Tue, 26 Jan 2016 13:40:37 +0000 (13:40 +0000)]
mmc: sdhci: clean up host cookie handling

Commit d31911b9374a ("mmc: sdhci: fix dma memory leak in sdhci_pre_req()")
added a complicated method to manage the DMA map state for the data
transfer, but this complexity is not required.

There are three states:
* Unmapped
* Mapped by sdhci_pre_req()
* Mapped by sdhci_prepare_data()

sdhci_prepare_data() needs to know when the data buffers have been
successfully mapped by sdhci_pre_req(), and if so, there is no need to
map them a second time.

When we come to tear down the mapping, we want to know whether
sdhci_post_req() will be called (which is determined by sdhci_pre_req()
having been previously called) so that we can postpone the unmap
operation.

Hence, it makes sense to simply record when the successful DMA map
happened (via COOKIE_PRE_MAPPED vs COOKIE_MAPPED) rather than having
the complex mechanics involving COOKIE_MAPPED vs COOKIE_GIVEN.

If a mapping is created by sdhci_prepare_data(), we must tear it down
ourselves, without waiting for sdhci_post_req() (hence, the new
COOKIE_MAPPED case).  If the mapping is created by sdhci_pre_req()
then sdhci_post_req() is responsible for tearing the mapping down.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: always unmap a mapped data transfer in sdhci_post_req()
Russell King [Tue, 26 Jan 2016 13:40:32 +0000 (13:40 +0000)]
mmc: sdhci: always unmap a mapped data transfer in sdhci_post_req()

If the host cookie indicates that the data buffers of a request are
mapped at sdhci_post_req() time, always unmap the data buffers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: pass the cookie into sdhci_pre_dma_transfer()
Russell King [Tue, 26 Jan 2016 13:40:27 +0000 (13:40 +0000)]
mmc: sdhci: pass the cookie into sdhci_pre_dma_transfer()

Pass the desired cookie for a successful map.  This is in preparation to
clean up the MAPPED/GIVEN states.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: factor out sdhci_pre_dma_transfer() from sdhci_adma_table_pre()
Russell King [Tue, 26 Jan 2016 13:40:22 +0000 (13:40 +0000)]
mmc: sdhci: factor out sdhci_pre_dma_transfer() from sdhci_adma_table_pre()

In sdhci_prepare_data(), when SDHCI_REQ_USE_DMA is set, there are two
paths that prepare the data buffers for transfer.  One is when
SDHCI_USE_ADMA is set, and is located inside sdhci_adma_table_pre().
The other is when SDHCI_USE_ADMA is clear, in the else clause of the
above.

Factor out the call to sdhci_pre_dma_transfer() along with its error
checking.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: move sdhci_pre_dma_transfer()
Russell King [Tue, 26 Jan 2016 13:40:16 +0000 (13:40 +0000)]
mmc: sdhci: move sdhci_pre_dma_transfer()

Move sdhci_pre_dma_transfer() to avoid needing to declare this function
before use.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: factor out common DMA cleanup in sdhci_finish_data()
Russell King [Tue, 26 Jan 2016 13:40:11 +0000 (13:40 +0000)]
mmc: sdhci: factor out common DMA cleanup in sdhci_finish_data()

sdhci_finish_data() has two paths which result in identical DMA cleanup.
One is when SDHCI_USE_ADMA is clear, and the other is just before when
SDHCI_USE_ADMA is set, and is performed within sdhci_adma_table_post().

Simplify the code by removing the 'else' and eliminating the duplicate
inside sdhci_adma_table_post().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: avoid walking SG list for writes
Russell King [Tue, 26 Jan 2016 13:40:06 +0000 (13:40 +0000)]
mmc: sdhci: avoid walking SG list for writes

If we are writing data to the card, there is no point in walking the
scatterlist to find out if there are any unaligned entries; this is a
needless waste of CPU cycles.  Avoid this by checking for a non-read
tranfer first.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: clean up coding style in sdhci_adma_table_pre()
Russell King [Tue, 26 Jan 2016 13:40:00 +0000 (13:40 +0000)]
mmc: sdhci: clean up coding style in sdhci_adma_table_pre()

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: allocate alignment and DMA descriptor buffer together
Russell King [Tue, 26 Jan 2016 13:39:55 +0000 (13:39 +0000)]
mmc: sdhci: allocate alignment and DMA descriptor buffer together

Allocate both the alignment and DMA descriptor buffers together.  The
size of the alignment buffer will always be aligned to the hosts
required alignment, which gives appropriate alignment to the DMA
descriptors.

We have a maximum of 128 segments, and a maximum alignment of 64 bits.
This gives a maximum alignment buffer size of 1024 bytes.

The DMA descriptors are a maximum of 12 bytes, and we allocate 128 * 2
+ 1 of these, which gives a maximum DMA descriptor buffer size of 3084
bytes.

This means the allocation for a 4K page sized system will be an order-1
allocation, since the resulting overall size is 4108.  This is more
prone to failure than page-sized allocations, but since this allocation
commonly occurs at startup, the chances of failure are small.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ Changed to check ADMA table alignment ]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: fix data timeout (part 2)
Russell King [Tue, 26 Jan 2016 13:41:04 +0000 (13:41 +0000)]
mmc: sdhci: fix data timeout (part 2)

The calculation for the timeout based on the number of card clocks is
incorrect.  The calculation assumed:

timeout in microseconds = clock cycles / clock in Hz

which is clearly a several orders of magnitude wrong.  Fix this by
multiplying the clock cycles by 1000000 prior to dividing by the Hz
based clock.  Also, as per part 1, ensure that the division rounds
up.

As this needs 64-bit math via do_div(), avoid it if the clock cycles
is zero.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v3.15+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: fix data timeout (part 1)
Russell King [Tue, 26 Jan 2016 13:40:58 +0000 (13:40 +0000)]
mmc: sdhci: fix data timeout (part 1)

The data timeout gives the minimum amount of time that should be
waited before timing out if no data is received from the card.
Simply dividing the nanosecond part by 1000 does not give this
required guarantee, since such a division rounds down.  Use
DIV_ROUND_UP() to give the desired timeout.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v3.15+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: further fix for DMA unmapping in sdhci_post_req()
Russell King [Tue, 26 Jan 2016 13:40:53 +0000 (13:40 +0000)]
mmc: sdhci: further fix for DMA unmapping in sdhci_post_req()

sdhci_post_req() exists to unmap a previously mapped but already
finished request, while the next request is in progress.  However, the
state of the SDHCI_REQ_USE_DMA flag depends on the last submitted
request.

This means we can end up clearing the flag due to a quirk, which then
means that sdhci_post_req() fails to unmap the DMA buffer, potentially
leading to data corruption.

We can safely ignore the SDHCI_REQ_USE_DMA here, as testing
data->host_cookie is entirely sufficient.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ Re-based to apply as a separate fix ]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-pxav3: fix higher speed mode capabilities
Russell King [Tue, 26 Jan 2016 13:40:47 +0000 (13:40 +0000)]
mmc: sdhci-pxav3: fix higher speed mode capabilities

Commit 1140011ee9d9 ("mmc: sdhci-pxav3: Modify clock settings for the
SDR50 and DDR50 modes") broke any chance of the SDR50 or DDR50 modes
being used.

The commit claims that SDR50 and DDR50 require clock adjustments in
the SDIO3 Configuration register, which is located via the "conf-sdio3"
resource.  However, when this resource is given, we fail to read the
host capabilities 1 register, resulting in host->caps1 being zero.
Hence, both SDHCI_SUPPORT_SDR50 and SDHCI_SUPPORT_DDR50 bits remain
zero, disabling the SDR50 and DDR50 modes.

The underlying idea in this function appears to be to read the device
capabilities, modify them, and set SDHCI_QUIRK_MISSING_CAPS to cause
our modified capabilities to be used.  Implement exactly that.

Fixes: 1140011ee9d9 ("mmc: sdhci-pxav3: Modify clock settings for the SDR50 and DDR50 modes")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: plug DMA mapping leak on error
Russell King [Tue, 26 Jan 2016 13:40:42 +0000 (13:40 +0000)]
mmc: sdhci: plug DMA mapping leak on error

If we terminate a command early, we fail to properly clean up the DMA
mappings for the data part of the request.  Put this clean up to the
tasklet, which is the common path for finishing a request so we always
clean up after ourselves.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ Split original patch so that it now contains only the fix ]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: avoid unnecessary mapping/unmapping of align buffer
Russell King [Tue, 26 Jan 2016 13:39:50 +0000 (13:39 +0000)]
mmc: sdhci: avoid unnecessary mapping/unmapping of align buffer

Unnecessarily mapping and unmapping the align buffer for SD cards is
expensive: performance measurements on iMX6 show that this gives a hit
of 10% on hdparm buffered disk reads.

MMC/SD card IO comes from the mm/vfs which gives us page based IO, so
for this case, the align buffer is not going to be used.  However, we
still map and unmap this buffer.

Eliminate this by switching the align buffer to be a DMA coherent
buffer, which needs no DMA maintenance to access the buffer.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: fix command response CRC error handling
Russell King [Tue, 26 Jan 2016 13:39:45 +0000 (13:39 +0000)]
mmc: sdhci: fix command response CRC error handling

When we get a response CRC error on a command, it means that the
response we received back from the card was not correct.  It does not
mean that the card did not receive the command correctly.  If the
command is one which initiates a data transfer, the card can enter the
data transfer state, and start sending data.

Moreover, if the request contained a data phase, we do not clean this
up, and this results in the driver triggering DMA API debug warnings,
and also creates a race condition in the driver, between running the
finish_tasklet and the data transfer interrupts, which can trigger a
"Got data interrupt" state dump.

Fix this by handing a response CRC error slightly differently: record
the failure of the data initiating command, but allow the remainder of
the request to be processed normally.  This is safe as core MMC checks
the status of all commands and data transfer phases of the request.

If the card does not initiate a data transfer, then we should time out
according to the data transfer parameters.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ Fix missing parenthesis around bitwise-AND expression, and tweak subject ]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: clean up command error handling
Russell King [Tue, 26 Jan 2016 13:39:39 +0000 (13:39 +0000)]
mmc: sdhci: clean up command error handling

Avoid multiple tests while handling a command error; simplify the code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
[ Goes with "mmc: sdhci: fix command response CRC error handling" ]
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci: move initialisation of command error member
Russell King [Tue, 26 Jan 2016 13:39:34 +0000 (13:39 +0000)]
mmc: sdhci: move initialisation of command error member

When a command is started, logically it has no error.  Initialise the
command's error member to zero whenever we start a command.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
[ Goes with "mmc: sdhci: fix command response CRC error handling" ]
Cc: stable@vger.kernel.org # v4.5+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agoMAINTAINERS: mmc: Add Adrian Hunter as the maintainer for SDHCI
Ulf Hansson [Thu, 11 Feb 2016 14:14:59 +0000 (15:14 +0100)]
MAINTAINERS: mmc: Add Adrian Hunter as the maintainer for SDHCI

up the maintainer role for SDHCI. I am very pleased that Adrian Hunter
volunteered and accepted the challenge!

The SDHCI code is currently in quite poor quality, but we have agreed on
a way forward to try to reach a point where the SDHCI core becomes more of
a set of library functions. Each SDHCI driver variant can then decide
which functions to use and allows it to implement variant specific code,
without needing to also change SDHCI core code.

In the end we aim to get better optimized and maintainable code.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
8 years agommc: sdhci: Allow CAPS check for SDHCI_CAN_64BIT to use overridden caps
Al Cooper [Wed, 10 Feb 2016 20:25:39 +0000 (15:25 -0500)]
mmc: sdhci: Allow CAPS check for SDHCI_CAN_64BIT to use overridden caps

sdhci_add_host() allows the Host Controller Capability registers
to be supplied by the calling driver by using
SDHCI_QUIRK_MISSING_CAPS, but the check for the Capabilities bit
SDHCI_CAN_64BIT doesn't use the applied value and instead reads
the Host register directly. This change uses the supplied "caps"
register instead of reading the host register.

This change will allow a calling driver to simply clear the
SDHCI_CAN_64BIT bit in "caps" to handle some cases of
SDHCI_QUIRK2_BROKEN_64_BIT_DMA.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-pic32: Add PIC32 SDHCI host controller driver
Andrei Pistirica [Thu, 14 Jan 2016 01:15:45 +0000 (18:15 -0700)]
mmc: sdhci-pic32: Add PIC32 SDHCI host controller driver

This driver supports the SDHCI host controller found on a PIC32.

Signed-off-by: Andrei Pistirica <andrei.pistirica@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
8 years agodt/bindings: mmc: Add bindings for PIC32 SDHCI host controller
Andrei Pistirica [Thu, 14 Jan 2016 01:15:44 +0000 (02:15 +0100)]
dt/bindings: mmc: Add bindings for PIC32 SDHCI host controller

Document the devicetree bindings for the SDHCI peripheral found on
Microchip PIC32 class devices.

Signed-off-by: Andrei Pistirica <andrei.pistirica@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
8 years agommc: dw_mmc: fix num_slots setting
Shawn Lin [Tue, 2 Feb 2016 06:11:25 +0000 (14:11 +0800)]
mmc: dw_mmc: fix num_slots setting

This patch make num_slots to 1 if pdata->num_slot is not
defined. Meanwhile, we need to make sure num_slots should
not larger that the supported slots

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: remove repetitive clear interrupt
Shawn Lin [Tue, 26 Jan 2016 00:43:36 +0000 (08:43 +0800)]
mmc: dw_mmc: remove repetitive clear interrupt

dw_mci_probe clear interrupts and disable all interrupts firstly.
While it clear interrupt again before enable some interrupts. We
can't see any reason to clear it twice here, so remove the second one.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: fix err handle of dw_mci_probe
Shawn Lin [Fri, 22 Jan 2016 07:43:12 +0000 (15:43 +0800)]
mmc: dw_mmc: fix err handle of dw_mci_probe

This patch add correct err handle if dw_mci_ctrl_reset
failed while probing.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: remove DW_MCI_QUIRK_BROKEN_CARD_DETECTION quirk
Shawn Lin [Thu, 21 Jan 2016 06:52:52 +0000 (14:52 +0800)]
mmc: dw_mmc: remove DW_MCI_QUIRK_BROKEN_CARD_DETECTION quirk

dw_mmc already use mmc_of_parse to get "broken-cd" property,
but it considered "broken-cd" to be a quirk in its driver. We
don't need this quirk here, and just take what we need from
mmc->caps.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: remove struct block_settings
Shawn Lin [Thu, 21 Jan 2016 08:06:14 +0000 (16:06 +0800)]
mmc: dw_mmc: remove struct block_settings

This patch removes struct block_settings since
it's never used anywhere.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: add hw_reset support
Shawn Lin [Thu, 14 Jan 2016 01:08:02 +0000 (09:08 +0800)]
mmc: dw_mmc: add hw_reset support

This patch implement hw_reset function for DesignWare
MMC controller. By adding this feature, mmc blk can
do some basic recovery.

Set the following resets:
software reset â€“ BMOD[0] for IDMAC only
DMA reset - CTRL[2]
FIFO reset - CTRL[1] bits

Program the CARD_RESET register with a value of 0 for the bit
corresponding to the card number; This programming asserts the
RST_n signal and resets the card. After a minimum of 1 ?s, de-asserts the
RST_n signal and takes the card out of reset. The application can program
a new CMD only after a minimum of 200 us

This implementation can be easily tested by cutting off->On vmmc
while doing data accessing in background to simulate that case.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: remove the prepare_command hook
Jaehoon Chung [Thu, 21 Jan 2016 02:01:06 +0000 (11:01 +0900)]
mmc: dw_mmc: remove the prepare_command hook

This patch removes the prepare_command hook from entire dw_mmc driver.
Now, almost all SoCs are using by default, except Exynos.
It seems that dwmmc controller is using unnecessary hook.
To know whether needs to set this bit or not,
add the DW_MMC_CARD_NO_USE_HOLD bit.

If some SoCs need to disable this in future, just set the
DW_MMC_CARD_NO_USE_HOLD bit.
set_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags),

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: report tuning command execution failure reason
Russell King [Fri, 29 Jan 2016 09:44:05 +0000 (09:44 +0000)]
mmc: core: report tuning command execution failure reason

Print the error code when the tuning command fails.  This allows the
reason for the failure to be reported, which aids debugging.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: block: shut up "retrying because a re-tune was needed" message
Russell King [Fri, 29 Jan 2016 09:44:00 +0000 (09:44 +0000)]
mmc: block: shut up "retrying because a re-tune was needed" message

Re-tuning is part of standard requirements for the higher speed SD
card protocols, and is not an error when this occurs.  When we retry
a command due to a retune, we should not print a message to the
kernel log.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: improve mmc_of_parse_voltage() to return better status
Russell King [Fri, 29 Jan 2016 09:43:55 +0000 (09:43 +0000)]
mmc: core: improve mmc_of_parse_voltage() to return better status

Improve mmc_of_parse_voltage()'s return values so that drivers can tell
whether a voltage-range specification was present, and whether it has
been successfully parsed, or there was an error while parsing.

We return a negative errno when parsing fails, zero if no voltage-range
specification is present, or one if a voltage-range specification is
successfully parsed.

No users need modifying as no users check the return value.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: shut up "voltage-ranges unspecified" pr_info()
Russell King [Fri, 29 Jan 2016 09:43:50 +0000 (09:43 +0000)]
mmc: core: shut up "voltage-ranges unspecified" pr_info()

Each time a driver such as sdhci-esdhc-imx is probed, we get a info
printk complaining that the DT voltage-ranges property has not been
specified.

However, the DT binding specifically says that the voltage-ranges
property is optional.  That means we should not be complaining that
DT hasn't specified this property: by indicating that it's optional,
it is valid not to have the property in DT.

Silence the warning if the property is missing.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: tmio: disable clock before changing it
Wolfram Sang [Tue, 19 Jan 2016 11:32:58 +0000 (12:32 +0100)]
mmc: tmio: disable clock before changing it

Rcar2 & 3 docs state that for going to and coming from the 0xff setting,
the clock must first be disabled before the DIV bits are changed.
Instead of tracking this, let's just do this unconditionally.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: tmio: refactor set_clock a little
Wolfram Sang [Tue, 19 Jan 2016 11:32:58 +0000 (12:32 +0100)]
mmc: tmio: refactor set_clock a little

Some of the indentation made the code awful to read. Fix that. Also,
introduce defines instead of magic hex values. Note that this includes
one change: We mask out know 0xff instead of 0x1ff. But 0x100 has always
been the clock enable bit. It doesn't make any sense to set it depending
on the clock calculation. Update copyright notices, too. I'll be working
on those files some more in the future.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhi: use faster clock handling on RCar Gen2
Wolfram Sang [Tue, 19 Jan 2016 11:36:16 +0000 (12:36 +0100)]
mmc: sdhi: use faster clock handling on RCar Gen2

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: tmio: remove stale comments
Wolfram Sang [Tue, 19 Jan 2016 11:32:58 +0000 (12:32 +0100)]
mmc: tmio: remove stale comments

These don't make sense anymore. Since commit 5d60e500541ed1 ("mmc: tmio:
add new TMIO_MMC_HAVE_HIGH_REG flags"), we don't deal with a resource
here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: tmio: add flag to reduce delay after changing clock status
Wolfram Sang [Tue, 19 Jan 2016 11:28:31 +0000 (12:28 +0100)]
mmc: tmio: add flag to reduce delay after changing clock status

The docs for RCar Gen2 & 3 I have access to, mention delays of 5ms after
stop and 1ms after start. Make it possible to apply these values.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhi: error message on ENOMEM is superfluous
Wolfram Sang [Tue, 19 Jan 2016 10:42:22 +0000 (11:42 +0100)]
mmc: sdhi: error message on ENOMEM is superfluous

We will get a full dump anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhi: Add EXT_ACC register busy check
Shinobu Uehara [Fri, 25 Apr 2014 09:14:17 +0000 (18:14 +0900)]
mmc: sdhi: Add EXT_ACC register busy check

All the docs I have access to say that this register needs the bus busy
check.

Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: tmio_dma: remove debug messages with little information
Wolfram Sang [Fri, 22 Jan 2016 14:51:59 +0000 (15:51 +0100)]
mmc: tmio_dma: remove debug messages with little information

When compiling the driver with CONFIG_MMC_DEBUG set, I got build
warnings. They have been 'fixed' meanwhile. However, because these debug
messages look random anyhow (some duplicate information printed etc),
let's just drop them and rather re-add something consistent if that
should ever be needed.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: block: don't use the OR operation for flag of data
Jaehoon Chung [Mon, 1 Feb 2016 12:07:36 +0000 (21:07 +0900)]
mmc: block: don't use the OR operation for flag of data

After removed the MMC_DATA_STREAM, only two flags are remained.
(MMC_DATA_READ and MMC_DATA_WRITE)
The flags of  READ and WRITE can't be used together.
That's why it doesn't need to use "OR' operation.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:35 +0000 (21:07 +0900)]
mmc: core: remove the MMC_DATA_STREAM flag

It's not set to MMC_DATA_STREAM anywhere.
It seems that it had been used with CMD11/CMD20.
But according to Spec, CMD11/CMD20 are obsolete command.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi-mmc: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:34 +0000 (21:07 +0900)]
mmc: sunxi-mmc: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: s3cmci: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:33 +0000 (21:07 +0900)]
mmc: s3cmci: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: pxamci: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:32 +0000 (21:07 +0900)]
mmc: pxamci: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: mxcmmc: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:31 +0000 (21:07 +0900)]
mmc: mxcmmc: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: jz4740_mmc: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:30 +0000 (21:07 +0900)]
mmc: jz4740_mmc: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: dw_mmc: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:29 +0000 (21:07 +0900)]
mmc: dw_mmc: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: davinci_mmc: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:28 +0000 (21:07 +0900)]
mmc: davinci_mmc: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: bfin_sdh: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:27 +0000 (21:07 +0900)]
mmc: bfin_sdh: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: atmel-mci: remove the MMC_DATA_STREAM flag
Jaehoon Chung [Mon, 1 Feb 2016 12:07:26 +0000 (21:07 +0900)]
mmc: atmel-mci: remove the MMC_DATA_STREAM flag

Remove the MMC_DATA_STREAM flag because it isn't used anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Enable eMMC HS-DDR (MMC_CAP_1_8V_DDR) support
Chen-Yu Tsai [Fri, 29 Jan 2016 17:21:48 +0000 (01:21 +0800)]
mmc: sunxi: Enable eMMC HS-DDR (MMC_CAP_1_8V_DDR) support

Now that clock delay settings for 8 bit DDR are correct, and vqmmc
support is available, we can enable MMC_CAP_1_8V_DDR support. This
enables MMC HS-DDR at up to 52 MHz, even if signal voltage switching
is not available.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Support 8 bit eMMC DDR transfer modes
Chen-Yu Tsai [Fri, 29 Jan 2016 17:21:47 +0000 (01:21 +0800)]
mmc: sunxi: Support 8 bit eMMC DDR transfer modes

Allwinner's MMC controller needs to run at double the card clock rate
for 8 bit DDR transfer modes. Interestingly, this is not needed for
4 bit DDR transfers.

Different clock delays are needed for 8 bit eMMC DDR, due to the
increased module clock rate. For the A80 though, the same values for
4 bit and 8 bit are shared. The new values for the other SoCs were from
A83T user manual's "new timing mode" default values, which describes
them in clock phase, rather than delay periods. These values were used
without any modification. They may not be correct, but they work.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Support MMC_DDR52 timing modes
Chen-Yu Tsai [Fri, 29 Jan 2016 17:21:46 +0000 (01:21 +0800)]
mmc: sunxi: Support MMC_DDR52 timing modes

DDR transfer modes include UHS-1 DDR50 and MMC HS-DDR (or MMC_DDR52).
Consider MMC_DDR52 when setting clock delays.

Since MMC high speed mode goes up to 52 MHz instead of 50 MHz for SD,
and this number is visible in the capability macro, increase the
clock rate upper limit to 52 MHz.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sanitize 'bus width' in debug output
Wolfram Sang [Fri, 29 Jan 2016 08:27:50 +0000 (09:27 +0100)]
mmc: sanitize 'bus width' in debug output

The bus width is sometimes the actual bus width, and sometimes indices
to different arrays encoding the bus width. In my debugging case "2"
could mean 8-bit as well as 4-bit, which was extremly confusing. Let's
use the human-readable actual bus width in all places.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: use the defined function to check whether card is removable
Jaehoon Chung [Thu, 28 Jan 2016 23:52:57 +0000 (08:52 +0900)]
mmc: core: use the defined function to check whether card is removable

In linux/mmc/host.h, mmc_card_is_removable() is already defined.
There is no reason that it doesn't use.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-iproc: use sdhci_pltfm_unregister directly
Jisheng Zhang [Tue, 26 Jan 2016 10:26:03 +0000 (18:26 +0800)]
mmc: sdhci-iproc: use sdhci_pltfm_unregister directly

The sdhci_iproc_remove() is jsut a wrapper to sdhci_pltfm_unregister.
So use the sdhci_pltfm_unregister() for the .remove hook directly.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: DT: sdhci-iproc: add bcm2835 compatible
Stefan Wahren [Wed, 27 Jan 2016 22:25:42 +0000 (22:25 +0000)]
mmc: DT: sdhci-iproc: add bcm2835 compatible

Since sdhci-iproc can support bcm2835 we need add the
compatible string to the binding.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-iproc: add bcm2835 support
Stefan Wahren [Wed, 27 Jan 2016 22:25:41 +0000 (22:25 +0000)]
mmc: sdhci-iproc: add bcm2835 support

Scott Branden from Broadcom said that the BCM2835 eMMC IP core is
very similar to IPROC and share most of the quirks. So use this driver
instead of separate one.

The sdhci-iproc contains a better workaround for the clock domain
crossing problem which doesn't need any delays. This results in a
better write performance.

Btw we get the rid of the SDHCI_CAPABILITIES hack in the sdhci_readl
function.

Suggested-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-iproc: define MMC caps in platform data
Stefan Wahren [Wed, 27 Jan 2016 22:25:40 +0000 (22:25 +0000)]
mmc: sdhci-iproc: define MMC caps in platform data

This patch moves the definition of the MMC capabilities
from the probe function into iproc platform data. After
that we are able to add support for another platform more
easily.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Suggested-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: mmc_test: mention that '0' runs all tests
Wolfram Sang [Mon, 25 Jan 2016 19:20:04 +0000 (20:20 +0100)]
mmc: mmc_test: mention that '0' runs all tests

I had to use the source to determine what I need to write to 'test' so
that all tests are run. Let's mention this explicitly in 'testlist'.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: mmcif: don't depend on MMC_BLOCK
Wolfram Sang [Mon, 25 Jan 2016 19:19:14 +0000 (20:19 +0100)]
mmc: mmcif: don't depend on MMC_BLOCK

I don't see a reason why a host driver should depend on the card driver.
It also prevents that we can use the mmc_test driver. So, remove it.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: make MAN_BKOPS_EN message a debug
Wolfram Sang [Mon, 25 Jan 2016 19:18:12 +0000 (20:18 +0100)]
mmc: make MAN_BKOPS_EN message a debug

IMO this info is only useful for developers. Most users won't need this
information, since there is not much they can do about it.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: omap_hsmmc: don't print uninitialized variables
Arnd Bergmann [Tue, 26 Jan 2016 15:26:31 +0000 (16:26 +0100)]
mmc: omap_hsmmc: don't print uninitialized variables

When DT based probing is used but the DMA request fails, the
driver will print uninitialized stack data from the rx_req
and tx_req variables, as indicated by this warning:

drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_probe':
drivers/mmc/host/omap_hsmmc.c:2162:3: warning: 'rx_req' may be used uninitialized in this function [-Wmaybe-uninitialized]
   dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);

This removes the DMA request line number from the warning, which
is the easiest solution and won't hurt us any more as we are
planning to remove the legacy code path anyway.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously
Fu, Zhonghui [Fri, 22 Jan 2016 04:35:26 +0000 (12:35 +0800)]
mmc: sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously

This patch enables sdhci-acpi devices to suspend/resume asynchronously.
This will improve system suspend/resume speed. After enabling the
sdhci-acpi devices and all their child devices to suspend/resume
asynchronously on ASUS T100TA, the system suspend-to-idle time is
reduced from 1645ms to 1089ms, and the system resume time is reduced
from 940ms to 908ms.

Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: enable mmc host device to suspend/resume asynchronously
Fu, Zhonghui [Fri, 22 Jan 2016 03:32:18 +0000 (11:32 +0800)]
mmc: core: enable mmc host device to suspend/resume asynchronously

This patch enables mmc hosts to suspend/resume asynchronously.
This will improve system suspend/resume speed. After applying
this patch and enabling all mmc hosts' child devices to
suspend/resume asynchronously on ASUS T100TA, the system
suspend-to-idle time is reduced from 1645ms to 1107ms, and the
system resume time is reduced from 940ms to 914ms.

Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Support vqmmc regulator
Chen-Yu Tsai [Thu, 21 Jan 2016 05:26:31 +0000 (13:26 +0800)]
mmc: sunxi: Support vqmmc regulator

eMMC chips require 2 power supplies, vmmc for internal logic, and vqmmc
for driving output buffers. vqmmc also controls signaling voltage. Most
boards we've seen use the same regulator for both, nevertheless the 2
have different usages, and should be set separately.

This patch adds support for vqmmc regulator supply, including voltage
switching. The MMC core can use this to try different signaling voltages
for eMMC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Return error on mmc_regulator_set_ocr() fail in .set_ios op
Chen-Yu Tsai [Thu, 21 Jan 2016 05:26:29 +0000 (13:26 +0800)]
mmc: sunxi: Return error on mmc_regulator_set_ocr() fail in .set_ios op

Let .set_ios() fail if mmc_regulator_set_ocr() fails to enable and set a
proper voltage for vmmc.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sunxi: Document host init sequence
Chen-Yu Tsai [Thu, 21 Jan 2016 05:26:28 +0000 (13:26 +0800)]
mmc: sunxi: Document host init sequence

sunxi_mmc_init_host() originated from Allwinner kernel sources. The
magic numbers written to various registers was never documented.

Add comments for values found in Allwinner user manuals.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-iproc: Actually enable the clock
Stefan Wahren [Sun, 17 Jan 2016 14:59:01 +0000 (14:59 +0000)]
mmc: sdhci-iproc: Actually enable the clock

The RPi firmware-based clocks driver can actually disable
unused clocks, so when switching to use it we ended up losing
our MMC clock once all devices were probed.

This patch adopts the changes from 1e5a0a9a58e2 ("mmc: sdhci-bcm2835:
Actually enable the clock") to sdhci-iproc.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: debugfs: Add a restriction to mmc debugfs clock setting
Chuanxiao Dong [Thu, 21 Jan 2016 12:57:51 +0000 (13:57 +0100)]
mmc: debugfs: Add a restriction to mmc debugfs clock setting

Clock frequency values written to an mmc host should not be less than
the minimum clock frequency which the mmc host supports.

Signed-off-by: Yuan Juntao <juntaox.yuan@intel.com>
Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-iproc: Clean up platform allocations if shdci init fails
Stefan Wahren [Sun, 17 Jan 2016 14:59:00 +0000 (14:59 +0000)]
mmc: sdhci-iproc: Clean up platform allocations if shdci init fails

This patch adopts the changes from 475c9e43bfa7 ("mmc: sdhci-bcm2835:
Clean up platform allocations if sdhci init fails") to sdhci-iproc.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdhci-of-arasan: Remove no-hispd and no-cmd23 quirks for sdhci-arasan4.9a
Rameshwar Prasad Sahu [Wed, 23 Dec 2015 13:29:51 +0000 (18:59 +0530)]
mmc: sdhci-of-arasan: Remove no-hispd and no-cmd23 quirks for sdhci-arasan4.9a

The Arason SD host controller supports set block count command (cmd23)
and high speed mode. This patch re-enable both of these features that
was disabled. For device that doesn't support high speed, it should
configure its capability register accordingly instead disables it
explicitly.

Signed-off-by: Rameshwar Prasad Sahu <rsahu@apm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: host: omap_hsmmc: add a verbose print to enable CONFIG_REGULATOR_PBIAS
Kishon Vijay Abraham I [Thu, 14 Jan 2016 09:15:20 +0000 (14:45 +0530)]
mmc: host: omap_hsmmc: add a verbose print to enable CONFIG_REGULATOR_PBIAS

Since v4.3+, CONFIG_REGULATOR_PBIAS should be enabled (for platforms that
have PBIAS regulator) in order for MMC1 to work.

Add a more verbose print to help enable CONFIG_REGULATOR_PBIAS for users
using a olddefconfig or a custom .config.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: remove unnecessary assignment statements before return
Masahiro Yamada [Fri, 8 Jan 2016 02:15:25 +0000 (11:15 +0900)]
mmc: remove unnecessary assignment statements before return

Variable assignment just before return is redundant.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: core: pwrseq_simple: remove unused header file
Peter Chen [Wed, 6 Jan 2016 03:34:10 +0000 (11:34 +0800)]
mmc: core: pwrseq_simple: remove unused header file

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: usdhi6rol0: use to_delayed_work
Geliang Tang [Fri, 1 Jan 2016 14:59:10 +0000 (22:59 +0800)]
mmc: usdhi6rol0: use to_delayed_work

Use to_delayed_work() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sh_mmcif: use to_delayed_work
Geliang Tang [Fri, 1 Jan 2016 14:59:09 +0000 (22:59 +0800)]
mmc: sh_mmcif: use to_delayed_work

Use to_delayed_work() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdricoh_cs: Less checks in sdricoh_init_mmc() after, error detection
Markus Elfring [Tue, 29 Dec 2015 20:45:34 +0000 (21:45 +0100)]
mmc: sdricoh_cs: Less checks in sdricoh_init_mmc() after, error detection

This issue was detected by using the Coccinelle software.

Two pointer checks could be repeated by the sdricoh_init_mmc() function
during error handling even if the relevant properties can be determined
for the involved variables before by source code analysis.

* This implementation detail could be improved by adjustments
  for jump targets according to the Linux coding style convention.

* Drop an unnecessary initialisation for the variable "mmc" then.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agommc: sdricoh_cs: Delete unnecessary variable initialisations
Markus Elfring [Tue, 29 Dec 2015 20:11:45 +0000 (21:11 +0100)]
mmc: sdricoh_cs: Delete unnecessary variable initialisations

These variables will eventually be set to an appropriate value a bit later.
* host
* iobase
* result

Thus let us omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
8 years agoLinux 4.5-rc6
Linus Torvalds [Sun, 28 Feb 2016 16:41:20 +0000 (08:41 -0800)]
Linux 4.5-rc6

8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Feb 2016 15:52:00 +0000 (07:52 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "A rather largish series of 12 patches addressing a maze of race
  conditions in the perf core code from Peter Zijlstra"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Robustify task_function_call()
  perf: Fix scaling vs. perf_install_in_context()
  perf: Fix scaling vs. perf_event_enable()
  perf: Fix scaling vs. perf_event_enable_on_exec()
  perf: Fix ctx time tracking by introducing EVENT_TIME
  perf: Cure event->pending_disable race
  perf: Fix race between event install and jump_labels
  perf: Fix cloning
  perf: Only update context time when active
  perf: Allow perf_release() with !event->ctx
  perf: Do not double free
  perf: Close install vs. exit race

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Feb 2016 15:49:23 +0000 (07:49 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
 "This update contains:

   - Hopefully the last ASM CLAC fixups

   - A fix for the Quark family related to the IMR lock which makes
     kexec work again

   - A off-by-one fix in the MPX code.  Ironic, isn't it?

   - A fix for X86_PAE which addresses once more an unsigned long vs
     phys_addr_t hickup"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mpx: Fix off-by-one comparison with nr_registers
  x86/mm: Fix slow_virt_to_phys() for X86_PAE again
  x86/entry/compat: Add missing CLAC to entry_INT80_32
  x86/entry/32: Add an ASM_CLAC to entry_SYSENTER_32
  x86/platform/intel/quark: Change the kernel's IMR lock bit to false

8 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Feb 2016 15:48:01 +0000 (07:48 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixlet from Thomas Gleixner:
 "A trivial printk typo fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/deadline: Fix trivial typo in printk() message

8 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Feb 2016 15:45:58 +0000 (07:45 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "Four small fixes for irqchip drivers:

   - Add missing low level irq handler initialization on mxs, so
     interrupts can acutally be delivered

   - Add a missing barrier to the GIC driver

   - Two fixes for the GIC-V3-ITS driver, addressing a double EOI write
     and a cache flush beyond the actual region"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3: Add missing barrier to 32bit version of gic_read_iar()
  irqchip/mxs: Add missing set_handle_irq()
  irqchip/gicv3-its: Avoid cache flush beyond ITS_BASERn memory size
  irqchip/gic-v3-its: Fix double ICC_EOIR write for LPI in EOImode==1

8 years agoMerge tag 'staging-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sun, 28 Feb 2016 15:39:15 +0000 (07:39 -0800)]
Merge tag 'staging-4.5-rc6' of git://git./linux/kernel/git/gregkh/staging

Pull staging/android fix from Greg KH:
 "Here is one patch, for the android binder driver, to resolve a
  reported problem.  Turns out it has been around for a while (since
  3.15), so it is good to finally get it resolved.

  It has been in linux-next for a while with no reported issues"

* tag 'staging-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER_DONE

8 years agoMerge tag 'usb-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 28 Feb 2016 15:37:30 +0000 (07:37 -0800)]
Merge tag 'usb-4.5-rc6' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are a few USB fixes for 4.5-rc6

  They fix a reported bug for some USB 3 devices by reverting the recent
  patch, a MAINTAINERS change for some drivers, some new device ids, and
  of course, the usual bunch of USB gadget driver fixes.

  All have been in linux-next for a while with no reported issues"

* tag 'usb-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  MAINTAINERS: drop OMAP USB and MUSB maintainership
  usb: musb: fix DMA for host mode
  usb: phy: msm: Trigger USB state detection work in DRD mode
  usb: gadget: net2280: fix endpoint max packet for super speed connections
  usb: gadget: gadgetfs: unregister gadget only if it got successfully registered
  usb: gadget: remove driver from pending list on probe error
  Revert "usb: hub: do not clear BOS field during reset device"
  usb: chipidea: fix return value check in ci_hdrc_pci_probe()
  usb: chipidea: error on overflow for port_test_write
  USB: option: add "4G LTE usb-modem U901"
  USB: cp210x: add IDs for GE B650V3 and B850V3 boards
  USB: option: add support for SIM7100E
  usb: musb: Fix DMA desired mode for Mentor DMA engine
  usb: gadget: fsl_qe_udc: fix IS_ERR_VALUE usage
  usb: dwc2: USB_DWC2 should depend on HAS_DMA
  usb: dwc2: host: fix the data toggle error in full speed descriptor dma
  usb: dwc2: host: fix logical omissions in dwc2_process_non_isoc_desc
  usb: dwc3: Fix assignment of EP transfer resources
  usb: dwc2: Add extra delay when forcing dr_mode

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sun, 28 Feb 2016 01:10:32 +0000 (17:10 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  do_last(): ELOOP failure exit should be done after leaving RCU mode
  should_follow_link(): validate ->d_seq after having decided to follow
  namei: ->d_inode of a pinned dentry is stable only for positives
  do_last(): don't let a bogus return value from ->open() et.al. to confuse us
  fs: return -EOPNOTSUPP if clone is not supported
  hpfs: don't truncate the file when delete fails

8 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Sun, 28 Feb 2016 00:58:32 +0000 (16:58 -0800)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "We didn't have a batch last week, so this one is slightly larger.

  None of them are scary though, a handful of fixes for small DT pieces,
  replacing properties with newer conventions.

  Highlights:
   - N900 fix for setting system revision
   - onenand init fix to avoid filesystem corruption
   - Clock fix for audio on Beaglebone-x15
   - Fixes on shmobile to deal with CONFIG_DEBUG_RODATA (default y in 4.6)

  + misc smaller stuff"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  MAINTAINERS: Extend info, add wiki and ml for meson arch
  MAINTAINERS: alpine: add a new maintainer and update the entry
  ARM: at91/dt: fix typo in sama5d2 pinmux descriptions
  ARM: OMAP2+: Fix onenand initialization to avoid filesystem corruption
  Revert "regulator: tps65217: remove tps65217.dtsi file"
  ARM: shmobile: Remove shmobile_boot_arg
  ARM: shmobile: Move shmobile_smp_{mpidr, fn, arg}[] from .text to .bss
  ARM: shmobile: r8a7779: Remove remainings of removed SCU boot setup code
  ARM: shmobile: Move shmobile_scu_base from .text to .bss
  ARM: OMAP2+: Fix omap_device for module reload on PM runtime forbid
  ARM: OMAP2+: Improve omap_device error for driver writers
  ARM: DTS: am57xx-beagle-x15: Select SYS_CLK2 for audio clocks
  ARM: dts: am335x/am57xx: replace gpio-key,wakeup with wakeup-source property
  ARM: OMAP2+: Set system_rev from ATAGS for n900
  ARM: dts: orion5x: fix the missing mtd flash on linkstation lswtgl
  ARM: dts: kirkwood: use unique machine name for ds112
  ARM: dts: imx6: remove bogus interrupt-parent from CAAM node

8 years agodo_last(): ELOOP failure exit should be done after leaving RCU mode
Al Viro [Sun, 28 Feb 2016 00:37:37 +0000 (19:37 -0500)]
do_last(): ELOOP failure exit should be done after leaving RCU mode

... or we risk seeing a bogus value of d_is_symlink() there.

Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agoshould_follow_link(): validate ->d_seq after having decided to follow
Al Viro [Sun, 28 Feb 2016 00:31:01 +0000 (19:31 -0500)]
should_follow_link(): validate ->d_seq after having decided to follow

... otherwise d_is_symlink() above might have nothing to do with
the inode value we've got.

Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agonamei: ->d_inode of a pinned dentry is stable only for positives
Al Viro [Sun, 28 Feb 2016 00:23:16 +0000 (19:23 -0500)]
namei: ->d_inode of a pinned dentry is stable only for positives

both do_last() and walk_component() risk picking a NULL inode out
of dentry about to become positive, *then* checking its flags and
seeing that it's not negative anymore and using (already stale by
then) value they'd fetched earlier.  Usually ends up oopsing soon
after that...

Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agodo_last(): don't let a bogus return value from ->open() et.al. to confuse us
Al Viro [Sun, 28 Feb 2016 00:17:33 +0000 (19:17 -0500)]
do_last(): don't let a bogus return value from ->open() et.al. to confuse us

... into returning a positive to path_openat(), which would interpret that
as "symlink had been encountered" and proceed to corrupt memory, etc.
It can only happen due to a bug in some ->open() instance or in some LSM
hook, etc., so we report any such event *and* make sure it doesn't trick
us into further unpleasantness.

Cc: stable@vger.kernel.org # v3.6+, at least
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agofs: return -EOPNOTSUPP if clone is not supported
Christoph Hellwig [Fri, 26 Feb 2016 17:53:12 +0000 (18:53 +0100)]
fs: return -EOPNOTSUPP if clone is not supported

-EBADF is a rather confusing error if an operations is not supported,
and nfsd gets rather upset about it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agohpfs: don't truncate the file when delete fails
Mikulas Patocka [Thu, 25 Feb 2016 17:17:38 +0000 (18:17 +0100)]
hpfs: don't truncate the file when delete fails

The delete opration can allocate additional space on the HPFS filesystem
due to btree split. The HPFS driver checks in advance if there is
available space, so that it won't corrupt the btree if we run out of space
during splitting.

If there is not enough available space, the HPFS driver attempted to
truncate the file, but this results in a deadlock since the commit
7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7 ("HPFS: Introduce a global mutex
and lock it on every callback from VFS").

This patch removes the code that tries to truncate the file and -ENOSPC is
returned instead. If the user hits -ENOSPC on delete, he should try to
delete other files (that are stored in a leaf btree node), so that the
delete operation will make some space for deleting the file stored in
non-leaf btree node.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: stable@vger.kernel.org # 2.6.39+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 27 Feb 2016 20:46:16 +0000 (12:46 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "10 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  dax: move writeback calls into the filesystems
  dax: give DAX clearing code correct bdev
  ext4: online defrag not supported with DAX
  ext2, ext4: only set S_DAX for regular inodes
  block: disable block device DAX by default
  ocfs2: unlock inode if deleting inode from orphan fails
  mm: ASLR: use get_random_long()
  drivers: char: random: add get_random_long()
  mm: numa: quickly fail allocations for NUMA balancing on full nodes
  mm: thp: fix SMP race condition between THP page fault and MADV_DONTNEED

8 years agoMerge tag 'tags/ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 27 Feb 2016 20:40:49 +0000 (12:40 -0800)]
Merge tag 'tags/ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext2/4 DAX fix from Ted Ts'o:
 "This fixes a file system corruption bug with DAX"

* tag 'tags/ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext2, ext4: fix issue with missing journal entry in ext4_dax_mkwrite()