The SDIO HW reset procedure in mwifiex_sdio_card_reset_work() is broken,
when the SDIO card is shared with another SDIO func driver. This is the
case when the Bluetooth btmrvl driver is being used in combination with
mwifiex. More precisely, when mwifiex_sdio_card_reset_work() runs to resets
the SDIO card, the btmrvl driver doesn't get notified about it. Beyond that
point, the btmrvl driver will fail to communicate with the SDIO card.

This is a generic problem for SDIO func drivers sharing an SDIO card, which
are about to be addressed in subsequent changes to the mmc core and the
mmc_hw_reset() interface. In principle, these changes means the
mmc_hw_reset() interface starts to return 1 if the are multiple drivers for
the SDIO card, as to indicate to the caller that the reset needed to be
scheduled asynchronously through a hotplug mechanism of the SDIO card.

Let's prepare the mwifiex driver to support the upcoming new behaviour of
mmc_hw_reset(), which means extending the mwifiex_sdio_card_reset_work() to
support the asynchronous SDIO HW reset path. This also means, we need to
allow the ->remove() callback to run, without waiting for the FW to be
loaded. Additionally, during system suspend, mwifiex_sdio_suspend() may be
called when a reset has been scheduled, but waiting to be executed. In this
scenario let's simply return -EBUSY to abort the suspend process, as to
allow the reset to be completed first.
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Cc: stable@vger.kernel.org # v5.4+
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Tony's email address from elandigitalsystems.com has bounced for a long
time. Let's update MAINTAINERS to mark the driver as orphan as to reflect
the situation.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

The ->init_card() host ops is printing message to the log, without actually
doing something useful. Let's just drop this code.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

This patch adds SDHI support for RZ/G2N (R8A774B1) SoC.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

MMC IOCTLS with R1B responses may cause the card to enter the busy state,
which means it's not ready to receive a new request. To prevent new
requests from being sent to the card, use a CMD13 polling loop to verify
that the card returns to the transfer state, before completing the request.
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

To prepare for more users of card_busy_detect(), let's drop the struct
request * as an in-parameter and convert to log the error message via
dev_err() instead of pr_err().
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

A previous patch implemented an incomplete workaround of erratum
A-008171. The complete workaround is as below. This patch is to
implement the complete workaround which uses SW tuning if HW tuning
fails, and retries both HW/SW tuning once with reduced clock if
workaround fails. This is suggested by hardware team, and the patch
had been verified on LS1046A eSDHC + Phison 32G eMMC which could
trigger the erratum.

Workaround:
/* For T1040, T2080, LS1021A, T1023 Rev 1: */
1. Program TBPTR[TB_WNDW_END_PTR] = 3*DIV_RATIO.
2. Program TBPTR[TB_WNDW_START_PTR] = 5*DIV_RATIO.
3. Program the software tuning mode by setting TBCTL[TB_MODE] = 2'h3.
4. Set SYSCTL2[EXTN] and SYSCTL2[SAMPCLKSEL].
5. Issue SEND_TUNING_BLK Command (CMD19 for SD, CMD21 for MMC).
6. Wait for IRQSTAT[BRR], buffer read ready, to be set.
7. Clear IRQSTAT[BRR].
8. Check SYSCTL2[EXTN] to be cleared.
9. Check SYSCTL2[SAMPCLKSEL], Sampling Clock Select. It's set value
   indicate tuning procedure success, and clear indicate failure.
   In case of tuning failure, fixed sampling scheme could be used by
   clearing TBCTL[TB_EN].
/* For LS1080A Rev 1, LS2088A Rev 1.0, LA1575A Rev 1.0: */
1. Read the TBCTL[31:0] register. Write TBCTL[11:8]=4'h8 and wait for
   1ms.
2. Read the TBCTL[31:0] register and rewrite again. Wait for 1ms second.
3. Read the TBSTAT[31:0] register twice.
3.1 Reset data lines by setting ESDHCCTL[RSTD] bit.
3.2 Check ESDHCCTL[RSTD] bit.
3.3 If ESDHCCTL[RSTD] is 0, go to step 3.4 else go to step 3.2.
3.4 Write 32'hFFFF_FFFF to IRQSTAT register.
4. if TBSTAT[15:8]-TBSTAT[7:0] > 4*DIV_RATIO or TBSTAT[7:0]-TBSTAT[15:8]
   > 4*DIV_RATIO , then program TBPTR[TB_WNDW_END_PTR] = 4*DIV_RATIO and
   program TBPTR[TB_WNDW_START_PTR] = 8*DIV_RATIO.
/* For LS1012A Rev1, LS1043A Rev 1.x, LS1046A 1.0: */
1. Read the TBCTL[0:31] register. Write TBCTL[20:23]=4'h8 and wait for
   1ms.
2. Read the TBCTL[0:31] register and rewrite again. Wait for 1ms second.
3. Read the TBSTAT[0:31] register twice.
3.1 Reset data lines by setting ESDHCCTL[RSTD] bit.
3.2 Check ESDHCCTL[RSTD] bit.
3.3 If ESDHCCTL[RSTD] is 0, go to step 3.4 else go to step 3.2.
3.4 Write 32'hFFFF_FFFF to IRQSTAT register.
4. if TBSTAT[16:23]-TBSTAT[24:31] > 4*DIV_RATIO or TBSTAT[24:31]-
   TBSTAT[16:23] > 4* DIV_RATIO , then program TBPTR[TB_WNDW_END_PTR] =
   4*DIV_RATIO and program TBPTR[TB_WNDW_START_PTR] = 8*DIV_RATIO.
/* For LS1080A Rev 1, LS2088A Rev 1.0, LA1575A Rev 1.0 LS1012A Rev1,
 * LS1043A Rev 1.x, LS1046A 1.0:
 */
5. else program TBPTR[TB_WNDW_END_PTR] = 3*DIV_RATIO and program
   TBPTR[TB_WNDW_START_PTR] = 5*DIV_RATIO.
6. Program the software tuning mode by setting TBCTL[TB_MODE] = 2'h3.
7. Set SYSCTL2[EXTN], wait 1us and SYSCTL2[SAMPCLKSEL].
8. Issue SEND_TUNING_BLK Command (CMD19 for SD, CMD21 for MMC).
9. Wait for IRQSTAT[BRR], buffer read ready, to be set.
10. Clear IRQSTAT[BRR].
11. Check SYSCTL2[EXTN] to be cleared.
12. Check SYSCTL2[SAMPCLKSEL], Sampling Clock Select. It's set value
    indicate tuning procedure success, and clear indicate failure.
    In case of tuning failure, fixed sampling scheme could be used by
    clearing TBCTL[TB_EN].

Fixes: b1f378ab ("mmc: sdhci-of-esdhc: add erratum A008171 support")
Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

The ESDHC_FLUSH_ASYNC_FIFO bit which is set to flush asynchronous FIFO
should be polled until it's auto cleared by hardware.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add a property to keep the analog calibration cell powered.
This feature is specific to the Microchip SDHCI IP and outside
of the standard SDHCI register map.

By always keeping it on, after a full reset sequence, we make sure
that this feature is activated and not disabled.

We expose a hardware property to the DT as this feature can be used
to adapt SDHCI behavior vs. how the SDCAL SoC pin is connected
on the board.

Note that managing properly this property would reduce
power consumption on some SAMA5D2 SiP revisions.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add the specific microchip,sdcal-inverted property to at91 sdhci
device binding.
This optional property describes how the SoC SDCAL pin is connected.
It could be handled at SiP, SoM or board level.

This property read by at91 sdhci driver will allow to put in place a
software workaround that would reduce power consumption.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Make sdmmc_idma_validate_data to avoid the following warning
from sparse:

drivers/mmc/host/mmci_stm32_sdmmc.c:28:5: warning: symbol 'sdmmc_idma_validate_data' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add PCI Ids for Intel JSL.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add support for low power mode to the Ingenic's MMC/SD Controller.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add support for probing mmc driver on the X1000 Soc from Ingenic.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add the MMC bindings for the X1000 Soc from Ingenic.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add support for probing mmc driver on the JZ4760 Soc from Ingenic.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add the MMC bindings for the JZ4760 Soc from Ingenic.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add support for 8bit mode, now supports 1bit/4bit/8bit modes.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Fix sparse warnings:

drivers/mmc/host/sdhci-pci-core.c:1599:6: warning: symbol 'amd_sdhci_reset' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

The current arasan sdhci PHY configuration isn't compatible
with the PHY on Intel's LGM(Lightning Mountain) SoC devices.

Therefore, add a new compatible, to adapt the Intel's LGM
SDXC PHY with arasan-sdhc controller to configure the PHY.
Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add a new compatible to use the sdhc-arasan host controller driver
with the SDXC PHY to support on Intel's Lightning Mountain(LGM) SoC.
Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

This patch adds a specific busy_complete callback for sdmmc variant.

sdmmc has 2 status flags:
-busyd0: This is a hardware status flag (inverted value of d0 line).
it does not generate an interrupt.
-busyd0end: This indicates only end of busy following a CMD response.
On busy to Not busy changes, an interrupt is generated (if unmask)
and BUSYD0END status flag is set. Status flag is cleared by writing
corresponding interrupt clear bit in MMCICLEAR.

The legacy busy completion has no dedicated interrupt for the end
of busy, so it's must monitor step by step the busy progression.
On sdmmc variant, this procedure is not needed, it's just need
to wait the busyd0end interrupt.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

This patch adds busy_completion callback at mmci_host_ops
to allow to define a specific busy completion by variant.

The legacy code corresponding to busy completion used
by ux500 variants is moved to ux500_busy_complete function.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

In the stm32_sdmmc variant, the datatimer is active not only during
data transfers with the DPSM, but also while waiting for the busyend
IRQs from commands having the MMC_RSP_BUSY flag set. This leads to an
incorrect IRQ being raised to signal MCI_DATATIMEOUT error, which
simply breaks the behaviour.

Address this by updating the datatimer value before sending a command
having the MMC_RSP_BUSY flag set. To inform the mmc core about the
maximum supported busy timeout, which also depends on the current
clock rate, set ->max_busy_timeout (in ms).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Fix the following sparse warnings by making any functions not used
outsde the mmci.c driver static.

drivers/mmc/host/mmci.c:422:6: warning: symbol 'mmci_dma_release' was not declared. Should it be static?
drivers/mmc/host/mmci.c:430:6: warning: symbol 'mmci_dma_setup' was not declared. Should it be static?
drivers/mmc/host/mmci.c:465:5: warning: symbol 'mmci_prep_data' was not declared. Should it be static?
drivers/mmc/host/mmci.c:481:6: warning: symbol 'mmci_unprep_data' was not declared. Should it be static?
drivers/mmc/host/mmci.c:490:6: warning: symbol 'mmci_get_next_data' was not declared. Should it be static?
drivers/mmc/host/mmci.c:498:5: warning: symbol 'mmci_dma_start' was not declared. Should it be static?
drivers/mmc/host/mmci.c:533:6: warning: symbol 'mmci_dma_finalize' was not declared. Should it be static?
drivers/mmc/host/mmci.c:542:6: warning: symbol 'mmci_dma_error' was not declared. Should it be static?
drivers/mmc/host/mmci.c:951:6: warning: symbol 'mmci_variant_init' was not declared. Should it be static?
drivers/mmc/host/mmci.c:956:6: warning: symbol 'ux500v2_variant_init' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

There are a couple of statements that are indented by an extra
space, clean this up by remove the extraneous spaces.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

There is a hunk of code that is indented one level too deep, fix
this by removing the extraneous tabs.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Document RZ/G2N (R8A774B1) SoC bindings.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Use devm_platform_ioremap_resource helper which wraps
platform_get_resource() and devm_ioremap_resource() together.

Generated by: scripts/coccinelle/api/devm_platform_ioremap_resource.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/Signed-off-by: Saiyam Doshi <saiyamdoshi.in@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

PM has been reworked, so eMMC gets now detected on R-Car H3 ES1.0 and
2.0 as well as M3-N without the workaround. Card detect and write
protect also still work. Remove the workaround.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add MAINTAINERS entry for Actions Semi SD/MMC driver with its binding.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add SD/MMC driver for Actions Semi Owl SoCs. This driver currently
supports standard, high speed, SDR12, SDR25 and SDR50. DDR50 mode is
supported but it is untested. There is no SDIO support for now.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add devicetree YAML binding for Actions Semi Owl SoC's SD/MMC/SDIO
controller.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

SD Host controller on Milbeaut consists of two controller parts.
One is core controller F_SDH30, this is similar to sdhci-fujitsu
controller.
Another is bridge controller.
This bridge controller is not compatible with sdhci-fujitsu controller.
This is special for Milbeaut series. This has some functions.
For example, reset control, clock enable/select for SDR50/25/12, set
property of SD physical pins, retuning control, set capabilityies.

This bridge controller requires special procedures at reset or clock
enablement or change for further tuning of clock.
Signed-off-by: Takao Orito <orito.takao@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Add the device-tree binding documentation for Milbeaut SDHCI driver.
Signed-off-by: Takao Orito <orito.takao@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

AMD SDHC 0x7906 requires a hard reset to clear all internal state.
Otherwise it can get into a bad state where the DATA lines are always
read as zeros.

This change requires firmware that can transition the device into
D3Cold for it to work correctly. If the firmware does not support
transitioning to D3Cold then the power state transitions are a no-op.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

In sdhci_do_reset we call the reset callback which is typically
sdhci_reset. sdhci_reset can wait for up to 100ms waiting for the
controller to reset. If SDHCI_RESET_ALL was passed as the flag, the
controller will clear the IRQ mask. If during that 100ms the card is
removed there is no notification to the MMC system that the card was
removed. So from the drivers point of view the card is always present.

By making sdhci_reinit compare the present state it can schedule a
rescan if the card was removed while a reset was in progress.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Pull ARM SoC fixes from Olof Johansson:
 "A set of fixes that have trickled in over the last couple of weeks:

   - MAINTAINER update for Cavium/Marvell ThunderX2

   - stm32 tweaks to pinmux for Joystick/Camera, and RAM allocation for
     CAN interfaces

   - i.MX fixes for voltage regulator GPIO mappings, fixes voltage
     scaling issues

   - More i.MX fixes for various issues on i.MX eval boards: interrupt
     storm due to u-boot leaving pins in new states, fixing power button
     config, a couple of compatible-string corrections.

   - Powerdown and Suspend/Resume fixes for Allwinner A83-based tablets

   - A few documentation tweaks and a fix of a memory leak in the reset
     subsystem"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  MAINTAINERS: update Cavium ThunderX2 maintainers
  ARM: dts: stm32: change joystick pinctrl definition on stm32mp157c-ev1
  ARM: dts: stm32: remove OV5640 pinctrl definition on stm32mp157c-ev1
  ARM: dts: stm32: Fix CAN RAM mapping on stm32mp157c
  ARM: dts: stm32: relax qspi pins slew-rate for stm32mp157
  arm64: dts: zii-ultra: fix ARM regulator GPIO handle
  ARM: sunxi: Fix CPU powerdown on A83T
  ARM: dts: sun8i-a83t-tbs-a711: Fix WiFi resume from suspend
  arm64: dts: imx8mn: fix compatible string for sdma
  arm64: dts: imx8mm: fix compatible string for sdma
  reset: fix reset_control_ops kerneldoc comment
  ARM: dts: imx6-logicpd: Re-enable SNVS power key
  soc: imx: gpc: fix initialiser format
  ARM: dts: imx6qdl-sabreauto: Fix storm of accelerometer interrupts
  arm64: dts: ls1028a: fix a compatible issue
  reset: fix reset_control_get_exclusive kerneldoc comment
  reset: fix reset_control_lookup kerneldoc comment
  reset: fix of_reset_control_get_count kerneldoc comment
  reset: fix of_reset_simple_xlate kerneldoc comment
  reset: Fix memory leak in reset_control_array_put()