Commit Graph

5470 Commits

Author SHA1 Message Date
Wolfram Sang
2a63303d9b mmc: sdhci: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:37 +01:00
Wolfram Sang
3b649a7369 mmc: omap_hsmmc: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:36 +01:00
Wolfram Sang
337d7c8a4e mmc: mxcmmc: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:36 +01:00
Wolfram Sang
2f98ef63b1 mmc: mtk-sd: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:35 +01:00
Wolfram Sang
510069527b mmc: mmci: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:35 +01:00
Wolfram Sang
aa5754c7d1 mmc: meson-mx-sdio: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:34 +01:00
Wolfram Sang
fa54f3e359 mmc: meson-gx-mmc: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:34 +01:00
Wolfram Sang
0f3a47b800 mmc: dw_mmc: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:33 +01:00
Wolfram Sang
10b0b012d2 mmc: cavium: catch all errors when getting regulators
Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:33 +01:00
Wolfram Sang
1f90e9a38c mmc: add kerneldoc to mmc_regulator_get_supply()
Especially, make clear what the return value means.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:32 +01:00
Masahiro Yamada
f02cebdfe9 mmc: sdhci-cadence: use bitfield access macros for cleanup
Accessing register fields generally need mask and shift part.
Defining them separately, like SDHCI_CDNS_HRS06_TUNE_{SHIFT,MASK},
is tedious.

Register fields can be always defined by GENMASK (or, BIT if it it
a single bit).  They are nicely handled by FIELD_* macros.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:32 +01:00
Dan Carpenter
2f129d39ad mmc: meson-mx-sdio: Cleanup IS_ERR() checks
Using PTR_ERR_OR_ZERO() instead of IS_ERR() works, but it's not how
you're supposed to write these conditions.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:50:31 +01:00
Dan Carpenter
7599b84932 mmc: meson-mx-sdio: return correct error code
This has a copy and paste bug so we use "host->fixed_factor_clk" which
is a valid pointer instead of "host->cfg_div_clk" which holds the error
code.

Fixes: ed80a13bb4 ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:49:42 +01:00
Jin Qian
04fa054025 mmc: core: export emmc revision
Expose emmc revision as part of device attributes.

Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:04 +01:00
Arnd Bergmann
9ccfa81725 mmc: sdhci-msm: fix x86 build error
The __WARN_printf() function is not portable across architectures
and causes a compile-time error on x86 and others that don't use
the asm-generic version of asm/bug.h:

drivers/mmc/host/sdhci-msm.c: In function 'sdhci_msm_check_power_status':
drivers/mmc/host/sdhci-msm.c:1066:4: error: implicit declaration of function '__WARN_printf'; did you mean '__dev_printk'? [-Werror=implicit-function-declaration]
    __WARN_printf("%s: pwr_irq for req: (%d) timed out\n",
    ^~~~~~~~~~~~~

The change that introduced this error, "mmc: sdhci-msm: Add sdhci msm
register write APIs which wait for pwr irq", likely meant to use
dev_warn(), so I'm changing over to that.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:04 +01:00
Fabrizio Castro
a3d95d1d40 mmc: tmio: check mmc_regulator_get_supply return value
mmc_regulator_get_supply returns -EPROBE_DEFER if either vmmc or
vqmmc regulators had their probing deferred.
vqmmc regulator is needed by UHS to work properly, therefore this
patch checks the value returned by mmc_regulator_get_supply to
make sure we have a reference to both vmmc and vqmmc (if found in
the DT).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:03 +01:00
Wolfram Sang
aaab3c4655 mmc: sunxi: drop superfluous error message
This error message can go because a) currently nothing else than
EPROBE_DEFER is returned and b) if this is going to change a much more
detailed error message should come from mmc_regulator_get_supply()
anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:03 +01:00
Carlo Caione
ed80a13bb4 mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs
Add a driver for the SDIO/MMC host found on the Amlogic Meson SoCs. This
is an MMC controller which provides an interface between the application
processor and various memory cards. It supports the SD specification
v2.0 and the eMMC specification v4.41.

The controller provides an internal "mux" which allows connecting up to
three MMC devices to it. Only one device can be used at a time though
since the registers are shared across all devices. The driver takes care
of synchronizing access (similar to the dw_mmc driver).
The maximum supported bus-width is 4-bits.

Amlogic's GPL kernel sources call the corresponding driver "aml_sdio" to
differentiate it from the other MMC controller in (at least the Meson8
and Meson8b) the SoCs (they call the other drivers aml_sdhc and
aml_sdhc_m8, which seem to support a bus-width of up to 8-bits). This
means that there are three different MMC host controller IP blocks from
Amlogic (each of them with completely own register layout and features):
- "SDIO": 1 and 4 bit bus width, support for high-speed modes up to
  UHS-I SDR50, part of Meson6, Meson8 and Meson8b (the driver from this
  patch targets this controller)
- "SDHC": 1, 4 and 8 bit bus width, compatible with standard iNAND
  interface, support for speeds up to HS200 and MMC spec up to version
  4.5x, part of Meson8 and Meson8b SoCs (there is no mainline driver
  for this controller yet)
- "SDEMMC": 1, 4 and 8 bit bus width, support for speeds up to HS400
  and MMC spec up to version 5.0, part of the Meson GX (64-bit) SoCs
  (supported by the meson-gx MMC host driver)

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:02 +01:00
Colin Ian King
519c51af0d mmc: sdhci-of-at91: make function sdhci_at91_set_uhs_signaling static
The function sdhci_at91_set_uhs_signaling  is local to the source and does
not need to be in global scope, so make it static.

Cleans up sparse warning:
symbol 'sdhci_at91_set_uhs_signaling' was not declared. Should it be
static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:01 +01:00
Colin Ian King
085cc3ab39 mmc: dw_mmc-k3: make array hs_timing_cfg static
The array hs_timing_cfg is local to the source and does not need to
be in global scope, so make it static.

Cleans up sparse warning:
symbol 'hs_timing_cfg' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:01 +01:00
Marek Szyprowski
3a8e9cad3e mmc: sdhci-s3c: Fix driver data for Exynos4 SoCs
Support for non-dt based initialization for Exynos SoCs has been removed,
so there is no need to keep driver IDs for this case. While touching this,
replace odd conditional code for instantiating driver data for Exynos4
SoCs with a simple reference and move that driver data under CONFIG_OF.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:00 +01:00
Jan Glauber
62467bbbbc mmc: cavium: Depend on GPIO driver
Without the ThunderX/OcteonTx GPIO driver the MMC driver
would not power up any MMC devices. Therefore add a
dependency to the GPIO driver and remove the unneeded GPIOLIB
dependency.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:46:00 +01:00
Vijay Viswanath
c0309b3803 mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq
Register writes which change voltage of IO lines or turn the IO bus
on/off require controller to be ready before progressing further. When
the controller is ready, it will generate a power irq which needs to be
handled. The thread which initiated the register write should wait for
power irq to complete. This will be done through the new sdhc msm write
APIs which will check whether the particular write can trigger a power
irq and wait for it with a timeout if it is expected.
The SDHC core power control IRQ gets triggered when -
* There is a state change in power control bit (bit 0)
  of SDHCI_POWER_CONTROL register.
* There is a state change in 1.8V enable bit (bit 3) of
  SDHCI_HOST_CONTROL2 register.
* Bit 1 of SDHCI_SOFTWARE_RESET is set.

Also add support APIs which are used by sdhc msm write APIs to check
if power irq is expected to be generated and wait for the power irq
to come and complete if the irq is expected.

This patch requires CONFIG_MMC_SDHCI_IO_ACCESSORS to be enabled.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:59 +01:00
Vijay Viswanath
99d570da30 mmc: Kconfig: Enable CONFIG_MMC_SDHCI_IO_ACCESSORS
Enable CONFIG_MMC_SDHCI_IO_ACCESSORS so that SDHC controller specific
register read and write APIs, if registered, can be used.

Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:59 +01:00
Sahitya Tummala
401b2d06c4 mmc: sdhci-msm: Fix HW issue with power IRQ handling during reset
There is a rare scenario in HW, where the first clear pulse could
be lost when the actual reset and clear/read of status register
are happening at the same time. Fix this by retrying upto 10 times
to ensure the status register gets cleared. Otherwise, this will
lead to a spurious power IRQ which results in system instability.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:58 +01:00
Subhash Jadavani
c7ccee224d mmc: sdhci-msm: fix issue with power irq
SDCC controller reset (SW_RST) during probe may trigger power irq if
previous status of PWRCTL was either BUS_ON or IO_HIGH_V. So before we
enable the power irq interrupt in GIC (by registering the interrupt
handler), we need to ensure that any pending power irq interrupt status
is acknowledged otherwise power irq interrupt handler would be fired
prematurely.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:58 +01:00
Adrian Hunter
6a11fc47f1 mmc: sd: Fix signal voltage when there is no power cycle
Some boards have SD card connectors where the power rail cannot be switched
off by the driver. However there are various circumstances when a card
might be re-initialized, such as after system resume, warm re-boot, or
error handling. However, a UHS card will continue to use 1.8V signaling
unless it is power cycled.

If the card has not been power cycled, it may still be using 1.8V
signaling. According to the SD spec., the Bus Speed Mode (function group 1)
bits 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
they can be used to determine if the card has already switched to 1.8V
signaling. Detect that situation and try to initialize a UHS-I (1.8V)
transfer mode.

Tested with the following cards:
  Transcend 4GB High Speed
  Kingston 64GB SDR104
  Lexar by Micron HIGH-PERFORMANCE 300x 16GB DDR50
  SanDisk Ultra 8GB DDR50
  Transcend Ultimate 600x 16GB SDR104
  Transcend Premium 300x 64GB SDR104
  Lexar by Micron Professional 1000x 32GB UHS-II SDR104
  SanDisk Extreme Pro 16GB SDR104

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Zhoujie Wu <zjwu@marvell.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:57 +01:00
Adrian Hunter
3f496afb6f mmc: core: Factor out mmc_host_set_uhs_voltage()
Factor out mmc_host_set_uhs_voltage() so it can be reused.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:57 +01:00
Adrian Hunter
cb39f61e9b mmc: core: Export a few functions needed for blkmq support
The following functions are needed by the mmc block device driver, once it
converts to blkmq, therefore let's export them.

mmc_start_bkops()
mmc_start_request()
mmc_retune_hold_now()
mmc_retune_release()

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:56 +01:00
Colin Ian King
27d70d3680 mmc: dw_mmc: make const arrays mszs static
Don't populate the const arrays mszs on the stack, instead make them
static. Makes the object code smaller by over 310 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  47527	   8528	    320	  56375	   dc37	drivers/mmc/host/dw_mmc.o

After:
   text	   data	    bss	    dec	    hex	filename
  47055	   8688	    320	  56063	   daff	drivers/mmc/host/dw_mmc.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:56 +01:00
Ziyuan
2afcbdb0d8 mmc: dw_mmc: correct outdated comment for use_dma
Since commit 3fc7eaef44 ("mmc: dw_mmc: Add external dma interface
support") use_dma no longer means only the data transfer mode, and
includes dma transmission channel. So make it more clear.

Signed-off-by: Ziyuan <ziyuan.biubiu@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:55 +01:00
Allen
c7ddaa2ec9 mmc-host: mxcmmc: use setup_timer() helper.
Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:55 +01:00
Allen
15e8c7d9c1 mmc-host: vub300: use setup_timer() helper.
Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:54 +01:00
Allen
4ffd3aaf37 mmc-host: via: use setup_timer() helper.
Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:54 +01:00
Allen
ec32e106a1 mmc-host: wbsd: use setup_timer() helper.
Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:53 +01:00
rui_feng
563be8b603 mmc: rtsx: fix tuning fail on gen3 PCI-Express
On gen3 PCI-Express we should send command one by one.
If sending many commands in one packet will lead to a failure.

Signed-off-by: rui_feng <rui_feng@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:53 +01:00
Adrian Hunter
c8b5fd031a mmc: block: Factor out mmc_setup_queue()
Factor out some common code that will also be used with blk-mq.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:52 +01:00
Adrian Hunter
93482b3d70 mmc: block: Prepare CQE data
Enhance mmc_blk_data_prep() to support CQE requests. That means adding
some things that for non-CQE requests would be encoded into the command
arguments - such as the block address, reliable-write flag, and data tag
flag. Also the request tag is needed to provide the command queue task id,
and a comment is added to explain the future possibility of defining a
priority.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:52 +01:00
Adrian Hunter
d3377c012f mmc: block: Use local variables in mmc_blk_data_prep()
Use local variables in mmc_blk_data_prep() in preparation for adding CQE
support which doesn't use the output variables.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:51 +01:00
Adrian Hunter
f690f4409d mmc: mmc: Enable CQE's
Enable or disable CQE when a card is added or removed respectively.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:51 +01:00
Adrian Hunter
98d4f7809d mmc: mmc: Enable Command Queuing
Enable the Command Queue if the host controller supports a command queue
engine. It is not compatible with Packed Commands, so make a note of that in the
comment.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:50 +01:00
Adrian Hunter
72a5af554d mmc: core: Add support for handling CQE requests
Add core support for handling CQE requests, including starting, completing
and recovering.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:50 +01:00
Adrian Hunter
6c0cedd1ef mmc: core: Introduce host claiming by context
Currently the host can be claimed by a task.  Change this so that the host
can be claimed by a context that may or may not be a task.  This provides
for the host to be claimed by a block driver queue to support blk-mq, while
maintaining compatibility with the existing use of mmc_claim_host().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:49 +01:00
Adrian Hunter
9ca28c5cd9 mmc: core: Remove unnecessary host claim
Callers already have the host claimed, so remove the unnecessary
calls to mmc_claim_host() and mmc_release_host().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:45:49 +01:00
Linus Walleij
1c87f73578 mmc: block: Fix bug when removing RPMB chardev
I forgot to account for the fact that the device core holds a
reference to a device added with device_initialize() that need
to be released with a corresponding put_device() to reach a 0
refcount at the end of the lifecycle.

This led to a NULL pointer reference when freeing the device
when e.g. unbidning the host device in sysfs.

Fix this and use the device .release() callback to free the
IDA and free:ing the memory used by the RPMB device.

Before this patch:

/sys/bus/amba/drivers/mmci-pl18x$ echo 80114000.sdi4_per2 > unbind
[   29.797332] mmc3: card 0001 removed
[   29.810791] Unable to handle kernel NULL pointer dereference at
               virtual address 00000050
[   29.818878] pgd = de70c000
[   29.821624] [00000050] *pgd=1e70a831, *pte=00000000, *ppte=00000000
[   29.827911] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
[   29.833282] Modules linked in:
[   29.836334] CPU: 1 PID: 154 Comm: sh Not tainted
               4.14.0-rc3-00039-g83318e309566-dirty #736
[   29.844604] Hardware name: ST-Ericsson Ux5x0 platform (Device Tree Support)
[   29.851562] task: de572700 task.stack: de742000
[   29.856079] PC is at kernfs_find_ns+0x8/0x100
[   29.860443] LR is at kernfs_find_and_get_ns+0x30/0x48

After this patch:

/sys/bus/amba/drivers/mmci-pl18x$ echo 80005000.sdi4_per2 > unbind
[   20.623382] mmc3: card 0001 removed

Fixes: 97548575be ("mmc: block: Convert RPMB to a character device")
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:44:49 +01:00
Linus Walleij
14f4ca7e4d mmc: block: Delete mmc_access_rpmb()
This function is used by the block layer queue to bail out of
requests if the current request is towards an RPMB
"block device".

This was done to avoid boot time scanning of this "block
device" which was never really a block device, thus duct-taping
over the fact that it was badly engineered.

This problem is now gone as we removed the offending RPMB block
device in another patch and replaced it with a character
device.

Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:40:10 +01:00
Linus Walleij
97548575be mmc: block: Convert RPMB to a character device
The RPMB partition on the eMMC devices is a special area used
for storing cryptographically safe information signed by a
special secret key. To write and read records from this special
area, authentication is needed.

The RPMB area is *only* and *exclusively* accessed using
ioctl():s from userspace. It is not really a block device,
as blocks cannot be read or written from the device, also
the signed chunks that can be stored on the RPMB are actually
256 bytes, not 512 making a block device a real bad fit.

Currently the RPMB partition spawns a separate block device
named /dev/mmcblkNrpmb for each device with an RPMB partition,
including the creation of a block queue with its own kernel
thread and all overhead associated with this. On the Ux500
HREFv60 platform, for example, the two eMMCs means that two
block queues with separate threads are created for no use
whatsoever.

I have concluded that this block device design for RPMB is
actually pretty wrong. The RPMB area should have been designed
to be accessed from /dev/mmcblkN directly, using ioctl()s on
the main block device. It is however way too late to change
that, since userspace expects to open an RPMB device in
/dev/mmcblkNrpmb and we cannot break userspace.

This patch tries to amend the situation using the following
strategy:

- Stop creating a block device for the RPMB partition/area

- Instead create a custom, dynamic character device with
  the same name.

- Make this new character device support exactly the same
  set of ioctl()s as the old block device.

- Wrap the requests back to the same ioctl() handlers, but
  issue them on the block queue of the main partition/area,
  i.e. /dev/mmcblkN

We need to create a special "rpmb" bus type in order to get
udev and/or busybox hot/coldplug to instantiate the device
node properly.

Before the patch, this appears in 'ps aux':

101 root       0:00 [mmcqd/2rpmb]
123 root       0:00 [mmcqd/3rpmb]

After applying the patch these surplus block queue threads
are gone, but RPMB is as usable as ever using the userspace
MMC tools, such as 'mmc rpmb read-counter'.

We get instead those dynamice devices in /dev:

brw-rw----    1 root     root      179,   0 Jan  1  2000 mmcblk0
brw-rw----    1 root     root      179,   1 Jan  1  2000 mmcblk0p1
brw-rw----    1 root     root      179,   2 Jan  1  2000 mmcblk0p2
brw-rw----    1 root     root      179,   5 Jan  1  2000 mmcblk0p5
brw-rw----    1 root     root      179,   8 Jan  1  2000 mmcblk2
brw-rw----    1 root     root      179,  16 Jan  1  2000 mmcblk2boot0
brw-rw----    1 root     root      179,  24 Jan  1  2000 mmcblk2boot1
crw-rw----    1 root     root      248,   0 Jan  1  2000 mmcblk2rpmb
brw-rw----    1 root     root      179,  32 Jan  1  2000 mmcblk3
brw-rw----    1 root     root      179,  40 Jan  1  2000 mmcblk3boot0
brw-rw----    1 root     root      179,  48 Jan  1  2000 mmcblk3boot1
brw-rw----    1 root     root      179,  33 Jan  1  2000 mmcblk3p1
crw-rw----    1 root     root      248,   1 Jan  1  2000 mmcblk3rpmb

Notice the (248,0) and (248,1) character devices for RPMB.

Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:40:10 +01:00
yangbo lu
dd3f6983b4 mmc: sdhci-of-esdhc: disable SD clock for clock value 0
SD clock should be disabled for clock value 0. It's not
right to just return. This may cause failure of signal
voltage switching.

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>
2017-10-30 11:40:09 +01:00
Adrian Hunter
cdaba732ff mmc: sdhci-pci: Add support for Intel CDF
Add PCI Id for Intel CDF.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:40:09 +01:00
Bjorn Andersson
4946b3af5e mmc: sdhci-msm: Enable delay circuit calibration clocks
The delay circuit used to support HS400 is calibrated based on two
additional clocks. When these clocks are not available and
FF_CLK_SW_RST_DIS is not set in CORE_HC_MODE, reset might fail. But on
some platforms this doesn't work properly and below dump can be seen in
the kernel log.

  mmc0: Reset 0x1 never completed.
  mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
  mmc0: sdhci: Sys addr:  0x00000000 | Version:  0x00001102
  mmc0: sdhci: Blk size:  0x00004000 | Blk cnt:  0x00000000
  mmc0: sdhci: Argument:  0x00000000 | Trn mode: 0x00000000
  mmc0: sdhci: Present:   0x01f80000 | Host ctl: 0x00000000
  mmc0: sdhci: Power:     0x00000000 | Blk gap:  0x00000000
  mmc0: sdhci: Wake-up:   0x00000000 | Clock:    0x00000002
  mmc0: sdhci: Timeout:   0x00000000 | Int stat: 0x00000000
  mmc0: sdhci: Int enab:  0x00000000 | Sig enab: 0x00000000
  mmc0: sdhci: AC12 err:  0x00000000 | Slot int: 0x00000000
  mmc0: sdhci: Caps:      0x742dc8b2 | Caps_1:   0x00008007
  mmc0: sdhci: Cmd:       0x00000000 | Max curr: 0x00000000
  mmc0: sdhci: Resp[0]:   0x00000000 | Resp[1]:  0x00000000
  mmc0: sdhci: Resp[2]:   0x00000000 | Resp[3]:  0x00000000
  mmc0: sdhci: Host ctl2: 0x00000000
  mmc0: sdhci: ============================================

Add support for the additional calibration clocks to allow these
platforms to be configured appropriately.

Cc: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Cc: Ritesh Harjani <riteshh@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Jeremy McNicoll <jeremymc@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-30 11:40:08 +01:00