mmc: davinci_mmc: Drop dangling variable

The sg_miter conversion left a dangling unused variable.
Drop it.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402142042.vg0lnLdb-lkp@intel.com/
Fixes: ed01d210fd91 ("mmc: davinci_mmc: Use sg_miter for PIO")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20240215-mmc-fix-davinci-v1-1-a593678ca7bf@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci_mmc: Use sg_miter for PIO

Use the scatterlist memory iterator instead of just
dereferencing virtual memory using sg_virt().
This make highmem references work properly.

Suggested-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/linux-mmc/20240122073423.GA25859@lst.de/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240127-mmc-proper-kmap-v2-1-d8e732aa97d1@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci_mmc: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230727070051.17778-7-frank.li@vivo.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: Explicitly include correct DT includes

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20230718143054.1065288-1-robh@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: Make SDIO irq truly optional

The following error is printed on Logic PD's DA850 EVM:
davinci_mmc 1c40000.mmc: error -ENXIO: IRQ index 1 not found

Depending on the board, the SDIO interrupt may not be present, so use
the correct function to reflect that and prevent logging an error.

Signed-off-by: Julien Delbergue <j.delbergue.foss@gmail.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/8b57db8d-1d3a-883e-eb8f-ddf15f19d823@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci_mmc: Handle error for clk_enable

As the potential failure of the clk_enable(),
it should be better to check it and return error
if fails.

Fixes: bbce5802afc5 ("davinci: mmc: updates to suspend/resume implementation")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220308071415.1093393-1-jiasheng@iscas.ac.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: Use of_device_get_match_data() helper

Only the device data is needed, not the entire struct of_device_id.
Use of_device_get_match_data() instead of of_match_device().

Signed-off-by: Bean Huo <beanhuo@micron.com>
Link: https://lore.kernel.org/r/20220202180648.1252154-6-huobean@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: remove unneeded semicolon

A semicolon is not needed after a switch statement.

Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20201031152708.2146690-1-trix@redhat.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v4.4

This is like commit 3d3451124f3d ("mmc: sdhci-msm: Prefer asynchronous
probe") but applied to a whole pile of drivers. This batch converts
the drivers that appeared to be around in the v4.4 timeframe.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> # SH_MMCIF
Tested-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200903162412.1.Id501e96fa63224f77bb86b2135a5e8324ffb9c43@changeid
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: Fix -Wpointer-to-int-cast on compile test

Store in interrupt service routine always '1' in end_command, not the
value of host->cmd to fix compile test warnings on RISC-V:

drivers/mmc/host/davinci_mmc.c:999:17: warning:
cast from pointer to integer of different size [-Wpointer-to-int-cast]

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200902204847.2764-1-krzk@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and the error value gets printed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200902193658.20539-3-krzk@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

mmc: core: Remove mmc_gpiod_request_*(invert_gpio)

Now that invert_gpio arguments are unused, let's remove them.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/64d766d1f8af2e22bce32f4ffa453f7234207ad6.1576031637.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
675 mass ave cambridge ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

mmc: davinci: remove extraneous __init annotation

Building with clang finds a mistaken __init tag:

WARNING: vmlinux.o(.text+0x5e4250): Section mismatch in reference from the function davinci_mmcsd_probe() to the function .init.text:init_mmcsd_host()
The function davinci_mmcsd_probe() references
the function __init init_mmcsd_host().
This is often because davinci_mmcsd_probe lacks a __init
annotation or the annotation of init_mmcsd_host is wrong.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: slot-gpio: Remove override_active_level on WP

The argument "override_active_level" made it possible to
enforce a specific polarity on the write-protect
GPIO line. All callers in the kernel pass "false" to this
call after I have converted all drivers to use GPIO machine
descriptors, so remove the argument and clean out this.

This kind of polarity inversion should be handled by the
GPIO descriptor inside the GPIO library if needed.

This rids us of one instance of the kludgy calls into
the gpiod_get_raw_value() API.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: host: simplify getting .drvdata

We should get drvdata from struct device directly. Going via
platform_device is an unneeded step back and forth.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: suppress error message on EPROBE_DEFER

This suppresses printing an error message during probe of the TI DaVinci
MMC driver when the error is EPROBE_DEFER.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: dont' use module_platform_driver_probe()

This changes module_platform_driver_probe() to module_platform_driver()
in the TI DaVinci MMC driver.

On device tree systems, we can get a -EPROBE_DEFER when using a pinmux
for the CD GPIO, which results in the driver never loading because
module_platform_driver_probe() prevents it from being re-probed.

So, we replace module_platform_driver_probe() with
module_platform_driver() and removed the __init attributes accordingly.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: constify mmc_host_ops structures

The mmc_host_ops structure is only stored in the ops field of an
mmc_host structure, which is declared as const. Thus the mmc_host_ops
structure itself can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct mmc_host_ops i@p = { ... };

@ok1@
struct mmc_host *mmc;
identifier r.i;
position p;
@@
mmc->ops = &i@p

@bad@
position p != {r.p,ok1.p};
identifier r.i;
struct mmc_host_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct mmc_host_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: use new core function mmc_get_dma_dir

Use new core function mmc_get_dma_dir().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: host: Include interrupt.h in mmc host drivers that depends on it

An mmc host driver shouldn't rely on interrupt.h being included by another
public mmc header. Instead make that dependency explicit by including
interrupt.h in those host drivers that depends on it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

mmc: davinci: request gpios using gpio descriptors

Request card detect and write protect gpios using the provided API
by mmc core.

If a gpio is provided for card detect, we don't need to poll.
So only use polling when a gpio is not provided.

Once all pdata users register the gpios using gpio descriptors,
we could remove the platform callbacks.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: David Lechner <david@lechnology.com>

mmc: davinci: use mmc_of_parse to parse common mmc configuration

Card detect and write protect are currently not working on a DT
boot, and the driver relies on polling to get the state
of the card. The current code depends on platform data callbacks
to register and get the state of the gpios.

mmc core provides a generic way to parse device tree configuration,
which will take care of registering the gpios for us, lets use it
so that we don't need to poll, and parse the same properties.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: David Lechner <david@lechnology.com>

mmc: davinci: remove incorrect NO_IRQ use

platform_get_irq() returns an error value on failure, not NO_IRQ,
so the error handling here could never work.

This changes the code to propagate the error value instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: prepare clock

When trying to use this driver with the common clock framework, enabling
the clock fails because it was not prepared. This fixes the problem by
calling clk_prepare and clk_enable in a single function. Ditto for
clk_disable_unprepare.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: fix unwinding in probe

Unwiding from an error in davinci_mmcsd_probe was a mess. Some errors were
not handled and not all paths unwound correctly. Also using devm_ where
possible to simplify things.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci: remove matching string

The string "MMCSDCLK" is not actually used for clock lookup, so can be
removed.

Signed-off-by: David Lechner <david@lechnology.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: davinci_mmc: Use dma_request_chan() to requesting DMA channel

With the new dma_request_chan() the client driver does not need to look for
the DMA resource and it does not need to pass filter_fn anymore.
By switching to the new API the driver can now support deferred probing
against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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>

mmc: davinci: Constify platform_device_id

The platform_device_id is not modified by the driver and core uses it as
const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: host: drop owner assignment from platform_drivers

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

mmc: davinci: Remove redundant of_match_ptr

The data structure of_match_ptr() protects is always compiled in.
Hence of_match_ptr() is not needed.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>

mmc: davinci_mmc: Move away from using deprecated APIs

Suspend and resume of cards are being handled from the protocol layer
and consequently the mmc_suspend|resume_host APIs are deprecated.

This means we can simplify the suspend|resume callbacks by removing the
use of the deprecated APIs.

Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Manjunathappa, Prakash <prakash.pm@ti.com>
Cc: davinci-linux-open-source@linux.davincidsp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

ARM: davinci: move private EDMA API to arm/common

Move mach-davinci/dma.c to common/edma.c so it can be used
by OMAP (specifically AM33xx) as well.

Signed-off-by: Matt Porter <mporter@ti.com>
Acked-by: Chris Ball <cjb@laptop.org> # davinci_mmc.c
Acked-by: Mark Brown <broonie@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
[nsekhar@ti.com: dropped davinci sffsdr changes]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

mmc: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci_mmc: add DT support

Adds device tree support for davinci_mmc. Also add binding documentation.
As of now tested for non-dma PIO mode and without GPIO card_detect/
write_protect option because of dependencies on EDMA and GPIO module DT
support.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Cc: linux-mmc@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Cc: devicetree-discuss@lists.ozlabs.org
Cc: cjb@laptop.org
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: mporter@ti.com
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: mmc: derive version information from device name

Remove specifying mmc controller IP version information via platform
data, instead specify device name so that driver derives it from
platform_device_id table. Also change the clock node name to match
the changed dev_id.
Tested on da850-evm to make sure driver loads without clk_get failures.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

mmc: davinci_mmc: use module_platform_driver_probe()

This patch uses module_platform_driver_probe() macro which makes
the code smaller and simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci_mmc: allow driver to work without DMA resource

Do not return probe failure with missing DMA resources, allow driver
to work in PIO mode. Tested on da850-evm by mounting partition
followed by file creation and deletion.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci_mmc: convert to DMA engine API

Removes use of the DaVinci EDMA private DMA API and replaces
it with use of the DMA engine API.

Signed-off-by: Matt Porter <mporter@ti.com>
Tested-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Chris Ball <cjb@laptop.org>

ARM: davinci: move platform_data definitions

Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the davinci include directories

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: "Ben Dooks" <ben-linux@fluff.org>
Cc: "Wolfram Sang" <w.sang@pengutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Liam Girdwood <lrg@ti.com>
Cc: davinci-linux-open-source@linux.davincidsp.com

mmc: davinci_mmc: convert to DMA engine API

Removes use of the DaVinci EDMA private DMA API and replaces
it with use of the DMA engine API.

Signed-off-by: Matt Porter <mporter@ti.com>
Tested-by: Tom Rini <trini@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

mmc: davinci_mmc: set MODULE_ALIAS to allow autoloading

Davinci MMC platform devices (as in mach-davinci/devices-da8xx.c) use
"davinci_mmc" as their name. To allow autoloading of the relevant
driver, the module needs to set the MODULE_ALIAS.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci: Poll status for small size transfers

For small size non-dma sdio transactions, it is sometimes better to poll
the mmc host and avoid interrupts altogether. Polling lowers the number
of interrupts and context switches. Tests have shown that for small
transactions, only a few polling iterations are needed, so this is worth
while.

Signed-off-by: Ido Yariv <ido@wizery.com>
Tested-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci: Eliminate spurious interrupts

The davinci mmc interrupt handler fills the fifo, as long as the DXRDY
or DRRDY bits are set in the status register.

If interrupts fire during this loop, they will be handled by the
handler, but the interrupt controller will still buffer these. As a
result, the handler will be called again to serve these needlessly. In
order to avoid these spurious interrupts, keep interrupts masked while
filling the fifo.

Signed-off-by: Ido Yariv <ido@wizery.com>
Tested-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: start removing enable / disable API

Most parts of the enable / disable API are no longer used and
can be removed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Venkatraman S <svenkatr@ti.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci: Add support for set_power callback

Some devices connected to the MMC bus are power controlled by external
means. For instance, an SDIO device may be powered down/up by an
external gpio line.

In order to avoid toggling power from within the MMC host driver, add a
set_power callback function, which will be called by set_ios upon
powering down/up.

Signed-off-by: Ido Yariv <ido@wizery.com>
CC: Chris Ball <cjb@laptop.org>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

mmc: davinci: add support for SDIO irq handling

This patch adds support for handling SDIO interrupt on DaVinci MMC/SD
controller.

The patch has been tested on DM355 and DA850 EVMs with Marvell Libertas
based SDIO wireless LAN card.

Signed-off-by: Alagu Sankar <alagusankar@embwise.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: davinci_mmc: Remove unnecessary semicolon

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: Remove distinction between hw and phys segments

We have deprecated the distinction between hardware and physical
segments in the block layer. Consolidate the two limits into one in
drivers/mmc/.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

mmc: remove the "state" argument to mmc_suspend_host()

Even though many mmc host drivers pass a pm_message_t argument to
mmc_suspend_host() that argument isn't used the by MMC core. As host
drivers are converted to dev_pm_ops they'll have to construct
pm_message_t's (as they won't be passed by the PM subsystem any more) just
to appease the mmc suspend interface.

We might as well just delete the unused paramter.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Michal Miroslaw <mirq-linux@rere.qmqm.pl>ZZ
Acked-by: Sascha Sommer <saschasommer@freenet.de>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

davinci: mmc: updates to suspend/resume implementation

Improve the suspend and resume callbacks in DaVinci MMC host controller
driver. Modify the reset status of the contorller and clock during
suspend and resume. Also migrate the power management callbacks from
platform driver to dev_pm_ops structure.

Tested on DA850/OMAP-L138 EVM.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Vipin Bhandari <vipin.bhandari@ti.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

davinci: mmc: add a function to control reset state of the controller

Add a helper function which will aid in changing the reset
status of the controller.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Vipin Bhandari <vipin.bhandari@ti.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

davinci: mmc: pass number of SG segments as platform data

On some platforms like DM355, the number of EDMA parameter slots available
for EDMA_SLOT_ANY usage are few. In such cases, if MMC/SD uses 16 slots
for each instance of MMC controller, then the number of slots available
for other modules will be very few.

By passing the number of EDMA slots to be used in MMC driver from platform
data, EDMA slots available for other purposes can be controlled.

Most of the platforms will not use this platform data variable. But on
DM355, as the number of EDMA resources available is limited, the number of
scatter- gather segments used inside the MMC driver can be 8 (passed as
platform data) instead of 16. On DM355, when the number of scatter-gather
segments was reduced to 8, I saw a performance difference of about
0.25-0.4 Mbytes/sec during write. Read performance variations were
negligible.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

davinci: MMC: add support for 8bit MMC cards

Add support for 8bit MMC cards. The controller data width is configurable
depending on the wires setting in the platform data structure.

MMC 8bit is tested on OMAPL137 and MMC 4bit is tested on OMAPL138 EVM.

Signed-off-by: Vipin Bhandari <vipin.bhandari@ti.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Chaithrika U S <chaithrika@ti.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

davinci: mmc: add cpufreq support

Add cpufreq support to MMC driver. The clock divider value has to be
modified according to the controller input frequency.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mmc: davinci: modify data types of EDMA related variables

Currently DaVinci EDMA driver supports multiple EDMA channel controller
instances. edma_alloc_channel() api returns a 32 bit value which has the
channel controller number in MSB and the EDMA channel number in LSB. The
variables which store the value returned by edma_alloc_channel() have to
be 32 bit wide now.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Vipin Bhandari <vipin.bhandari@ti.com>
Cc: Purshotam Kumar <purushotam@ti.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

DaVinci: MMC: MMC/SD controller driver for DaVinci family

Add support for MMC/SD controller driver for all DaVinci family SoC. This
patch supports davinci family SoC's DM6446, DM355, DM365 and
DA830/OMAPL137.

The patch has been tested on DM355 EVM.

The MMCSD controller specifications for DM355 can be found at
http://focus.ti.com/general/docs/litabsmultiplefilelist.tsp?literatureNumber=spruee2c

Signed-off-by: Vipin Bhandari <vipin.bhandari@ti.com>
Signed-off-by: Purshotam Kumar <purushotam@ti.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>