This patch is coming to fix compatibility issue of BKOPS_EN  field of EXT_CSD.
In eMMC-5.1, BKOPS_EN was changed, and now it has two operational bits:
Bit 0 - MANUAL_EN
Bit 1 - AUTO_EN
In previous eMMC revisions, only Bit 0 was supported.
Signed-off-by: NAlexey Skidanov <alexey.skidanov@sandisk.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current code checks "clk_delay_cycles > 0" to know whether the optional
"mrvl,clk_delay_cycles" is set or not. But of_property_read_u32() doesn't
touch clk_delay_cycles if the property is not set. And type of
clk_delay_cycles is u32, so we may always set pdata->clk_delay_cycles as a
random value.

This patch fix this problem by check the return value of of_property_read_u32()
to know whether the optional clk-delay-cycles is set or not.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Cc: <stable@vger.kernel.org> # v3.6+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

dw_mci_pltfm_remove() is not (nor should it be) marked as __exit,
so we should not be using __exit_p() wrapper with it.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Tested-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

dw_mci_pltfm_remove() is not (nor should it be) marked as __exit,
so we should not be using __exit_p() wrapper with it.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Tested-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Let MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER depend on MMC_SDHCI. Not
only this is more correct, but this also avoids breaking the alignment
of all other MMC_SDHCI_* options in menuconfig.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Chris Ball <chris@printf.net>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Albert Herranz <albert_herranz@yahoo.es>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Config option MMC_RICOH_MMC's help text reads:

	  If unsure, say Y.

However the option defaults to N. Set the default to Y to match the
recommendation in the help text.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Chris Ball <chris@printf.net>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Philipl Langdale <philipl@overt.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

DMA configuration has been removed from function mmci_dma_setup but the
local mask variable was not removed. This remains unused hence remove
it from the function and operations on it
Signed-off-by: NPramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch is to fix a race condition that may cause an unhandled irq,
which results in big sdhci interrupt numbers and endless "mmc1: got irq
while runtime suspended" msgs before v3.15.

Consider following scenario:

      CPU0                            CPU1
                              sdhci_pxav3_runtime_suspend()
                               spin_lock_irqsave(&host->lock, flags);
 sdhci_irq()
  spining on the &host->lock
                               host->runtime_suspended = true;
                               spin_unlock_irqrestore(&host->lock, flags);
  get the &host->lock
  runtime_suspended is true now
  return IRQ_NONE;

Fix this race by using the core sdhci.c supplied sdhci_runtime_suspend_host()
in runtime suspend hook which will disable card interrupts. We also use the
sdhci_runtime_resume_host() in the runtime resume hook accordingly.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Cc: <stable@vger.kernel.org> # v3.9+
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Directly return the result of mmc_blk_alloc_req() instead of assigning
and returning the variable md.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

The need for reset GPIOs has several times been pointed out from
erlier posted patchsets. Especially some WLAN chips which are
attached to an SDIO interface may use a GPIO reset.

The reset GPIO is asserted at initialization and prior we start the
power up procedure. The GPIO will be de-asserted right after the power
has been provided to the card, from the ->post_power_on() callback.

Note, the reset GPIO is optional. Thus we don't return an error even if
we can't find a GPIO for the consumer.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>

To add the core part for the MMC power sequence, let's start by adding
initial support for the simple MMC power sequence provider.

In this initial step, the MMC power sequence node are fetched and the
compatible string for the simple MMC power sequence provider are
verified.

At this point we don't parse the node for any properties, but instead
that will be handled from following patches. Since there are no
properties supported yet, let's just implement the ->alloc() and the
->free() callbacks.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>

System on chip designs may specify a specific MMC power sequence. To
successfully detect an (e)MMC/SD/SDIO card, that power sequence must
be followed while initializing the card.

To be able to handle these SOC specific power sequences, let's add a
MMC power sequence interface. It provides the following functions to
help the mmc core to deal with these power sequences.

mmc_pwrseq_alloc() - Invoked from mmc_of_parse(), to initialize data.
mmc_pwrseq_pre_power_on()- Invoked in the beginning of mmc_power_up().
mmc_pwrseq_post_power_on()- Invoked at the end in mmc_power_up().
mmc_pwrseq_power_off()- Invoked from mmc_power_off().
mmc_pwrseq_free() - Invoked from mmc_free_host(), to free data.

Each MMC power sequence provider will be responsible to implement a set
of callbacks. These callbacks mirrors the functions above.

This patch adds the skeleton, following patches will extend the core of
the MMC power sequence and add support for a specific simple MMC power
sequence.

Do note, since the mmc_pwrseq_alloc() is invoked from mmc_of_parse(),
host drivers needs to make use of this API to enable the support for
MMC power sequences. Moreover the MMC power sequence support depends on
CONFIG_OF.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>

Commit 63589e92 ("clk: Ignore error and NULL pointers passed to
clk_{unprepare, disable}()") allows NULL or error pointer to be passed
unconditionally.

This patch is to simplify probe error and remove code paths.

However, we reserve the core clock checks in runtime suspend/resume code
because we want a little smaller latency.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Check sg_count before sending long data xfer.
Because dma_map_sg() return int, and sg_count may be negative,
so using int instead of unsigned.
Signed-off-by: NMicky Ching <micky_ching@realsil.com.cn>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Return error-code directly if no card exist, this can
make card remove faster.
Signed-off-by: NMicky Ching <micky_ching@realsil.com.cn>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci_f_sdh30.c:143:5-11: inconsistent IS_ERR and PTR_ERR, PTR_ERR on line 144

 PTR_ERR should access the value just tested by IS_ERR

Semantic patch information:
 There can be false positives in the patch case, where it is the call
 IS_ERR that is wrong.

Generated by: scripts/coccinelle/tests/odd_ptr_err.cocci

CC: Vincent Yang <vincent.yang.fujitsu@gmail.com>
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Signed-off-by: NNicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Fixed the following warning (reported by cppcheck):
[drivers/mmc/card/block.c:2149]: (warning) %d in format string (no. 1)
requires 'int' but the argument type is 'unsigned int'.
Signed-off-by: NAsaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

tmio_mmc_host has .enable_dma callback now.
We don't need TMIO_MMC_HAVE_CTL_DMA_REG anymore.
Let's remove it
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Now, sh_mobile_sdhi can use 32bit DMA access in R-Cer Gen2.
Let's use it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

tmio_mmc_dma has .enable_dma callback now.
let's use it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

getting struct sh_mobile_sdhi from struct mmc_host needs to use
complex container_of(). This patch adds new host_to_priv macro to
get it easily.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Latest SDHI on Renesas has expand register mapping.
update mmc_data->bus_shift for it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

No one is using .init/.cleanup callback function.
Let's remove these.
sdhi_ops and .cd_wakeup are also removed
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Renesas SDHI which is based on TMIO driver has 2 type SoC. 1st one is
used as SH-Mobile series, and 2nd is R-Car series. R-Car series SoC has
DMA buswidth setting register which enables 32bit access.
This patch adds .dma_buswidth and enables it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Some controllers need DMA special register/setting.
This patch adds new .enable_dma callback for it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .dma_rx_offset is implemented under tmio_mmc_dma.
It goes to tmio_mmc_data by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .alignment_shift is implemented under tmio_mmc_dma.
It goes to tmio_mmc_data by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .bus_shift is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .multi_io_quirk is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .clk_disable is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .clk_enable is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .write16_hook is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current .dma is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Current tmio_mmc driver is using tmio_mmc_data for driver/platform
specific data/callback, and it is needed for tmio_mmc_host_probe()
function. Because of this style, include/linux/mfd/tmio.h header has
tmio driver/framework specific data which is not needed from platform.

This patch adds new tmio_mmc_host_alloc/free() as cleanup preparation.
tmio driver specific data/callback will be implemented in tmio_mmc_host,
and platform specific data/callback will be implemented in tmio_mmc_data
in this cleanup.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch adds new host controller driver for
Fujitsu SDHCI controller f_sdh30.
Signed-off-by: NVincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: NAndy Green <andy.green@linaro.org>
Signed-off-by: NTetsuya Takinishi <t.takinishi@jp.fujitsu.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch defines a quirk to disable the block count
for single block transactions.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: NVincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch defines a quirk for tuning work
around for some sdhci host controller. It sets
both SDHCI_CTRL_EXEC_TUNING and SDHCI_CTRL_TUNED_CLK
for tuning.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: NVincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

This patch adds a callback function to do
controller-specific actions when switching voltages.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: NVincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

If we power up vqmmc in MMC_POWER_ON then we end up turning it on
before mmc_power_up() sets the signal voltage.  That's not so great
since we might be powering it up at the wrong voltage.

Note that this is how Yuvaraj originally coded things up in
<https://patchwork.kernel.org/patch/4401231/> but he changed it on my
suggestion.  Apparently I was wrong.
Reported-by: NAlexandru M Stan <amstan@chromium.org>
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>