mmc: mediatek: Use data tune for CMD line tune

If we don't select a set of better parameters for our emmc host,
It may easily occur CMD response CRC error. And also it may cause
cann

mmc: mediatek: Use data tune for CMD line tune

If we don't select a set of better parameters for our emmc host,
It may easily occur CMD response CRC error. And also it may cause
cannot boot up issue.

Fot getting a set of better parameters, our emmc host supports
data tune mechanism.Therefore, our emmc driver also should change
to use data tune for CMD line.

Because our emmc host use the different clock source to sample the
CMD signal between HS200 and HS400 mode, the parameters are also
different between these two modes.
Separate cmd internal delay for HS200/HS400 mode.

This change can fix "System can not boot up" issue.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Fixed bug where clock frequency could be set wrong

This patch can fix two issues:

Issue 1:
In previous code, div may be overflow when setting clock frequency

mmc: mediatek: Fixed bug where clock frequency could be set wrong

This patch can fix two issues:

Issue 1:
In previous code, div may be overflow when setting clock frequency
as f_min. We can use DIV_ROUND_UP to fix this boundary related
issue.

Issue 2:
In previous code, we can not set the correct clock frequency when
div equals 0xff.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: correct the implementation of msdc_card_busy

msdc_card_busy only need check if the data0 is low.
In sdio data1 irq mode, data1 may be low because of interruption.

mmc: mediatek: correct the implementation of msdc_card_busy

msdc_card_busy only need check if the data0 is low.
In sdio data1 irq mode, data1 may be low because of interruption.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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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 depe

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>

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mmc: delete is_first_req parameter from pre-request callback

The void (*pre_req) callback in the struct mmc_host_ops vtable
is passing an argument "is_first_req" indicating whether this

mmc: delete is_first_req parameter from pre-request callback

The void (*pre_req) callback in the struct mmc_host_ops vtable
is passing an argument "is_first_req" indicating whether this is
the first request or not.

None of the in-kernel users use this parameter: instead, since
they all just do variants of dma_map* they use the DMA cookie
to indicate whether a pre* callback has already been done for
a request when they decide how to handle it.

Delete the parameter from the callback and all users, as it is
just pointless cruft.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Fix module autoload

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered

mmc: mediatek: Fix module autoload

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/mmc/host/mtk-sd.ko | grep alias
$

After this patch:

$ modinfo drivers/mmc/host/mtk-sd.ko | grep alias
alias: of:N*T*Cmediatek,mt8135-mmcC*
alias: of:N*T*Cmediatek,mt8135-mmc

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: perfer to use rise edge latching

in our host design, rise edge latching is more stable than fall edge
latching. so that if rise edge has enough margin, no need scan fall e

mmc: mediatek: perfer to use rise edge latching

in our host design, rise edge latching is more stable than fall edge
latching. so that if rise edge has enough margin, no need scan fall edge.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: fix CMD21/CMD19 timeout issue

we did not deal with the read data of CMD21/CMD19 if there is
response CRC error of CMD21/CMD19, in this case, eMMC/SD may
still in send-

mmc: mediatek: fix CMD21/CMD19 timeout issue

we did not deal with the read data of CMD21/CMD19 if there is
response CRC error of CMD21/CMD19, in this case, eMMC/SD may
still in send-data state. therefore, all of next commands cannot
get response as device is not in transfer state.

for resolving this issue, still need deal with the data receive
to make device back to transfer state.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: fix CRC error when calling mmc_select_hs400()

the tune result of hs200 mode at 200Mhz is not suitable for 50Mhz,
mmc_select_hs400() will set clock frequency to 50Mhz, use

mmc: mediatek: fix CRC error when calling mmc_select_hs400()

the tune result of hs200 mode at 200Mhz is not suitable for 50Mhz,
mmc_select_hs400() will set clock frequency to 50Mhz, use defalut
tune setting for 50Mhz to avoid CRC error.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: do not tune data for HS400 mode

for hs400 mode, should only tune DS delay, should not
tune PAD_TUNE for data path.
if eMMC will run at hs400 mode, do not tune data whi

mmc: mediatek: do not tune data for HS400 mode

for hs400 mode, should only tune DS delay, should not
tune PAD_TUNE for data path.
if eMMC will run at hs400 mode, do not tune data while
call ops->execute_tuning().

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Remove redundant runtime PM calls

Commit 9250aea76bfc ("mmc: core: Enable runtime PM management of host
devices"), made some calls to the runtime PM API from the driver

mmc: mediatek: Remove redundant runtime PM calls

Commit 9250aea76bfc ("mmc: core: Enable runtime PM management of host
devices"), made some calls to the runtime PM API from the driver
redundant. Especially those which deals with runtime PM reference
counting, so let's remove them.

Cc: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch

We've introduced a new helper in the MMC core:
mmc_regulator_set_vqmmc(). Let's use this in mtk-sd. Using this

mmc: mediatek: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch

We've introduced a new helper in the MMC core:
mmc_regulator_set_vqmmc(). Let's use this in mtk-sd. Using this new
helper has some advantages:

1. We get the mmc_regulator_set_vqmmc() behavior of trying to match
VQMMC and VMMC when the signal voltage is 3.3V. This ensures max
compatibility.

2. We get rid of a few more warnings when probing unsupported
voltages.

3. We get rid of some non-mediatek specific code in mtk-sd.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Change signal voltage error to dev_dbg()

In commit ceae98f20e36 ("mmc: core: Try other signal levels
during power up") we can see that there are times when it's
valid

mmc: mediatek: Change signal voltage error to dev_dbg()

In commit ceae98f20e36 ("mmc: core: Try other signal levels
during power up") we can see that there are times when it's
valid to try several signal voltages. Don't print an ugly
error in the logs when that happens.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: add SD write protect support

use mmc core layer's API to support sd write protect

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Han

mmc: mediatek: add SD write protect support

use mmc core layer's API to support sd write protect

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: change some dev_err to dev_dbg

there are too many error logs shown when use CMD21/CMD19 to do tune,
and it will appear at each resume time, print out so many logs to the

mmc: mediatek: change some dev_err to dev_dbg

there are too many error logs shown when use CMD21/CMD19 to do tune,
and it will appear at each resume time, print out so many logs to the
uart console cost too mush time. so change it to dev_dbg.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: core: Remove MMC_CAP_RUNTIME_RESUME as it's redundant

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: mediatek: Preinitialize delay_phase in get_best_delay()

drivers/mmc/host/mtk-sd.c: In function ‘get_best_delay’:
drivers/mmc/host/mtk-sd.c:1284: warning: ‘delay_phase.start’ is used

mmc: mediatek: Preinitialize delay_phase in get_best_delay()

drivers/mmc/host/mtk-sd.c: In function ‘get_best_delay’:
drivers/mmc/host/mtk-sd.c:1284: warning: ‘delay_phase.start’ is used uninitialized in this function
drivers/mmc/host/mtk-sd.c:1284: warning: ‘delay_phase.maxlen’ is used uninitialized in this function

If delay is zero, these fields are indeed not initialized.
Let the compiler preinitialize the whole struct to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: add HS400 support

add HS400 mode and tune support

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc: mediatek: add implement of ops->hw_reset()

add implement of ops->hw_reset() for eMMC

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <u

mmc: mediatek: add implement of ops->hw_reset()

add implement of ops->hw_reset() for eMMC

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: fix got GPD checksum error interrupt when data transfer

Even if we only use one gpd, we need alloc 2 gpd and make
the gpd->next pointer to the second gpd, or may get gpd c

mmc: mediatek: fix got GPD checksum error interrupt when data transfer

Even if we only use one gpd, we need alloc 2 gpd and make
the gpd->next pointer to the second gpd, or may get gpd checksum
error, this was checked by hardware

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: change the argument "ddr" to "timing"

use the ios->timing directly is better
It can reflect current timing and do settings by timing

Signed-off-by: Chaotian Jing

mmc: mediatek: change the argument "ddr" to "timing"

use the ios->timing directly is better
It can reflect current timing and do settings by timing

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: make cmd_ints_mask to const

cmd_ints_mask and data_ints_mask are constant value,
so make it to const

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>

mmc: mediatek: make cmd_ints_mask to const

cmd_ints_mask and data_ints_mask are constant value,
so make it to const

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Add MMC_CAP_RUNTIME_RESUME support

Add MMC_CAP_RUNTIME_RESUME support to save resume time
Drop unnecessary SDC_ARG write

Signed-off-by: Chaotian Jing <chaotian.ji

mmc: mediatek: Add MMC_CAP_RUNTIME_RESUME support

Add MMC_CAP_RUNTIME_RESUME support to save resume time
Drop unnecessary SDC_ARG write

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Add PM support for MMC driver

Add PM support for Mediatek MMC driver
Save/restore registers when PM

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>

mmc: mediatek: Add PM support for MMC driver

Add PM support for Mediatek MMC driver
Save/restore registers when PM

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: mediatek: Add Mediatek MMC driver

Add Mediatek MMC driver code
Support eMMC/SD/SDIO

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson

mmc: mediatek: Add Mediatek MMC driver

Add Mediatek MMC driver code
Support eMMC/SD/SDIO

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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