commit 98e90de99a
"mmc: host: switch OF parser to use gpio descriptors"
switched the semantic behaviour of card detect and read
only flags such that the inversion capability flag would
only be set if inversion was explicitly specified in the
device tree, in the hopes that no-one was using double
inversion.
It turns out that the XOR:ing between the explicit
inversion was indeed in use, so we need to restore the
old semantics where both ways of inversion are checked
and the end result XOR:ed.
Reported-by: Javier Martinez Canillas <javier@dowhile0.org>
Tested-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
It is possible to turn off the card clock by setting
the frequency to zero via debugfs e.g.
echo 0 > /sys/kernel/debug/mmc0/clock
However that produces an incorrect warning that is
designed to warn if the frequency is below the minimum
operating frequency. So correct the warning.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
mmc_gpiod_free_cd() is paired with mmc_gpiod_request_cd()
and both must reference the same device which is the
actual host controller device not the mmc_host class
device.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Add MMC_POWER_UNDEFINED for power_mode in struct mmc_ios and use it as
the initial value of host->ios.power_mode.
For hosts with MMC_CAP2_NO_PRESCAN_POWERUP, this makes the later
mmc_power_off() do real power-off things instead of NOP, and further
prevents state messed up in cards that was already initialized (eg. by
BIOS of UEFI driver).
Signed-off-by: Roger Tseng <rogerable@realtek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Use the much more common pr_warn instead of pr_warning.
Other miscellanea:
o Coalesce formats
o Realign arguments
o Remove extra spaces when coalescing formats
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The same tuning block exists in the dw_mmc h.c and sdhci-msm.c
files. Move these into mmc.c so that they can be shared across
drivers.
Reported-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
As soon as the CD IRQ is requested, it can trigger, since it's an
externally controlled event. If it does, delayed_work host->detect will
be scheduled.
Many host controller probe()s are roughly structured as:
*_probe() {
host = sdhci_pltfm_init();
mmc_of_parse(host->mmc);
rc = sdhci_add_host(host);
if (rc) {
sdhci_pltfm_free();
return rc;
}
In 3.17, CD IRQs can are enabled quite early via *_probe() ->
mmc_of_parse() -> mmc_gpio_request_cd() -> mmc_gpiod_request_cd_irq().
Note that in linux-next, mmc_of_parse() calls mmc_gpio*d*_request_cd()
rather than mmc_gpio_request_cd(), and mmc_gpio*d*_request_cd() doesn't
call mmc_gpiod_request_cd_irq(). However, this issue still exists if
mmc_gpio_request_cd() is called directly before mmc_start_host().
sdhci_add_host() may fail part way through (e.g. due to deferred
probe for a vmmc regulator), and sdhci_pltfm_free() does nothing to
unrequest the CD IRQ nor cancel the delayed_work. sdhci_pltfm_free() is
coded to assume that if sdhci_add_host() failed, then the delayed_work
cannot (or should not) have been triggered.
This can lead to the following with CONFIG_DEBUG_OBJECTS_* enabled, when
kfree(host) is eventually called inside sdhci_pltfm_free():
WARNING: CPU: 2 PID: 6 at lib/debugobjects.c:263 debug_print_object+0x8c/0xb4()
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x18
The object being complained about is host->detect.
There's no need to request the CD IRQ so early; mmc_start_host() already
requests it. For most SDHCI hosts at least, the typical call path that
does this is: *_probe() -> sdhci_add_host() -> mmc_add_host() ->
mmc_start_host(). Therefore, remove the call to mmc_gpiod_request_cd_irq()
from mmc_gpio_request_cd(). This also matches mmc_gpio*d*_request_cd(),
which already doesn't call mmc_gpiod_request_cd_irq().
However, some host controller drivers call mmc_gpio_request_cd() after
mmc_start_host() has already been called, and assume that this will also
call mmc_gpiod_request_cd_irq(). Update those drivers to explicitly call
mmc_gpiod_request_cd_irq() themselves. Ideally, these drivers should be
modified to move their call to mmc_gpio_request_cd() before their call
to mmc_add_host(). However that's too large a change for stable.
This solves the problem (eliminates the kernel error message above),
since it guarantees that the IRQ can't trigger before mmc_start_host()
is called.
The critical point here is that once sdhci_add_host() calls
mmc_add_host() -> mmc_start_host(), sdhci_add_host() is coded not to
fail. In other words, if there's a chance that mmc_start_host() may have
been called, and CD IRQs triggered, and the delayed_work scheduled,
sdhci_add_host() won't fail, and so cleanup is no longer via
sdhci_pltfm_free() (which doesn't free the IRQ or cancel the work queue)
but instead must be via sdhci_remove_host(), which calls mmc_remove_host()
-> mmc_stop_host(), which does free the IRQ and cancel the work queue.
CC: Russell King <linux@arm.linux.org.uk>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Checks EXT_CSD_PARTITION_SETTING_COMPLETED bit before
computing enhanced user area offset and size, and
adding mmc general purpose partitions. The two needs
EXT_CSD_PARTITION_SETTING_COMPLETED bit be set to be
valid (as described in JEDEC standard).
Warn user in case of misconfiguration.
Signed-off-by: Grégory Soutadé <gsoutade@neotion.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Replace ext_csd "enhanced_area_en" attribute by
"partition_setting_completed". It was used whether or
not enhanced user area is defined and without checks of
EXT_CSD_PARTITION_SETTING_COMPLETED bit.
Signed-off-by: Grégory Soutadé <gsoutade@neotion.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Move code that manages user area and general purpose
partitions into functions.
Signed-off-by: Grégory Soutadé <gsoutade@neotion.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This switches the central MMC OF parser to use gpio descriptors
instead of grabbing GPIOs explicitly from the device tree.
This strips out an unecessary use of the integer-based GPIO
API that we want to get rid of, cuts down on code as the
gpio descriptor code will handle active low flags.
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This makes it possible to get the write protect (read only)
GPIO line from a GPIO descriptor. Written to exactly mirror
the card detect function.
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
When the slot GPIO driver gets the GPIO to be used for card
detect, it is now possible to specify a flag to have the line
set up as input. Get rid of the explicit setup call for input
and use the flag.
The extra argument works as there are transition varargs
macros in place in the <linux/gpio/consumer.h> header, in
the future we will make the flags argument compulsory.
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Even (e)MMC card can support 3.3v to 1.2v vccq in DDR, but not all
host controller can support this, like some of the SDHCI host
which connect to an eMMC device. Some of these host controller
still needs to use 1.8v vccq for supporting DDR mode.
So the sequence will be:
if (host and device can both support 1.2v IO)
use 1.2v IO;
else if (host and device can both support 1.8v IO)
use 1.8v IO;
so if host and device can only support 3.3v IO, this is the last choice.
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: Yunpeng Gao <yunpeng.gao@intel.com>
Tested-by: Jean-Michel Hautbois <jhautbois@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The operation conditions register (OCR) stores the voltage
profile of the card, however the list of possible voltages
is restricted by the voltage range supported by the supply
used as VCC/VDD. So in mmc_vddrange_to_ocrmask() a OCR mask
is obtained to filter the not supported voltages, from the
value read in the host controller OCR register.
For fixed regulators, regulator_list_voltage() returns the
fixed output for the first selector but this doesn't happen
for switch (FET) regulators that obtain their voltage from
their parent supply. A call to regulator_get_voltage() is
needed in this case so the regulator core can return the
FET's parent supply voltage output.
This change is consistent with the fact that for other
fixed regulators (that are not FETs) the OCR mask is
returned even when mmc_regulator_set_ocr() checks if the
regulator is fixed before calling regulator_set_voltage().
Without this patch, the following warning is reported when
a FET is used as a vmmc-supply:
dwmmc_exynos 12220000.mmc: Failed getting OCR mask: -22
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Some eMMC and SD cards implement a DSR register that allows to tune
raise/fall times and drive strength of the CMD and DATA outputs.
The values to use depend on the card in use and the host.
It might be needed to reduce the drive strength to prevent voltage peaks
above the host's specification.
Implement a 'dsr' devicetree property that allows to specify the value
to set the DSR to. For non-dt setups the new members of mmc_host can be
set by board code.
This patch was initially authored by Sascha Hauer. It contains
improvements authored by Markus Niebel and Uwe Kleine-König.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
There is no need for regulator consumers to include special logic for
fixed voltage regulators as they support regulator_set_voltage() just
like their non-fixed regulator counterparts.
Signed-off-by: Tim Kryger <tim.kryger@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Currently when the device secure discard implementation is
blacklisted (MMC_QUIRK_SEC_ERASE_TRIM_BROKEN quirk is set)
instead of secure discard we're going to do normal discard,
which is wrong.
When the secure discard is known to be broken we should just
disallow it entirely and not advertise this functionality to
the user. Fix it.
Also move mmc_fixup_device() in from of mmc_blk_alloc() so we
can get quirks set before we attempt to set queue information.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
As stated by the eMMC 5.0 specification, a chip should not be rejected
only because of the revision stated in the EXT_CSD_REV field of the
EXT_CSD register.
Remove the control on this value, the control of the CSD_STRUCTURE field
should be sufficient to reject future incompatible changes.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The initialization of some SD-cards fails because the card never
leaves the busy state. Aid trouble shooting by indicating this in the
kernel log.
Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
There is no need for an output like this:
> mmcblk mmc1:0001: calling add_quirk_mmc+0x0/0x20
Instead use this one:
> mmcblk mmc1:0001: calling add_quirk_mmc
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The runtime PM core handles a runtime_idle callback set to NULL as one
returning 0. So, let's just set it to NULL instead.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Rather than the SDIO support spawning it's own thread for handling card
interrupts, use the generic IRQ infrastructure for this, triggering it
from the host interface's interrupt handling directly.
This avoids a race between the parent thread waiting to receive an
interrupt response from the card, and the slow startup from the sdio
irq thread, which can occur as a result of high system load (eg, while
udev is running.)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
[Ulf Hansson] Resolved conflict
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Linus Walleij
Adrian Hunter
Roger Tseng
Joe Perches
Stephen Boyd
Stephen Warren
Grégory Soutadé
Chuanxiao.Dong
Javier Martinez Canillas
Sascha Hauer
Fu Zhonghui
Tim Kryger
Lukas Czerner
Romain Izard
Johan Rudholm
Alexander Stein
Ulf Hansson
Russell King