- Fix a race condition in the request handling
- Skip trim commands for some buggy kingston eMMCs
- An optimization and a correction for erase groups
- Set CMD23 quirk for some Sandisk cards
MMC host:
- sdhci: Give GPIO CD higher precedence and don't poll when it's used
- sdhci: Fix DMA memory leakage
- sdhci: Some updates for clock management
- sdhci-of-at91: introduce driver for the Atmel SDMMC
- sdhci-of-arasan: Add support for sdhci-5.1
- sdhci-esdhc-imx: Add support for imx7d which also supports HS400
- sdhci: A collection of fixes and improvements for various sdhci hosts
- omap_hsmmc: Modernization of the regulator code
- dw_mmc: A couple of fixes for DMA and PIO mode
- usdhi6rol0: A few fixes and support probe deferral for regulators
- pxamci: Convert to use dmaengine
- sh_mmcif: Fix the suspend process in a short term solution
- tmio: Adjust timeout for commands
- sunxi: Fix timeout while gating/ungating clock
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=wR1C
-----END PGP SIGNATURE-----
Merge tag 'mmc-v4.3' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson:
"MMC core:
- Fix a race condition in the request handling
- Skip trim commands for some buggy kingston eMMCs
- An optimization and a correction for erase groups
- Set CMD23 quirk for some Sandisk cards
MMC host:
- sdhci: Give GPIO CD higher precedence and don't poll when it's used
- sdhci: Fix DMA memory leakage
- sdhci: Some updates for clock management
- sdhci-of-at91: introduce driver for the Atmel SDMMC
- sdhci-of-arasan: Add support for sdhci-5.1
- sdhci-esdhc-imx: Add support for imx7d which also supports HS400
- sdhci: A collection of fixes and improvements for various sdhci hosts
- omap_hsmmc: Modernization of the regulator code
- dw_mmc: A couple of fixes for DMA and PIO mode
- usdhi6rol0: A few fixes and support probe deferral for regulators
- pxamci: Convert to use dmaengine
- sh_mmcif: Fix the suspend process in a short term solution
- tmio: Adjust timeout for commands
- sunxi: Fix timeout while gating/ungating clock"
* tag 'mmc-v4.3' of git://git.linaro.org/people/ulf.hansson/mmc: (67 commits)
mmc: android-goldfish: remove incorrect __iomem annotation
mmc: core: fix race condition in mmc_wait_data_done
mmc: host: omap_hsmmc: remove CONFIG_REGULATOR check
mmc: host: omap_hsmmc: use ios->vdd for setting vmmc voltage
mmc: host: omap_hsmmc: use regulator_is_enabled to find pbias status
mmc: host: omap_hsmmc: enable/disable vmmc_aux regulator based on previous state
mmc: host: omap_hsmmc: don't use ->set_power to set initial regulator state
mmc: host: omap_hsmmc: avoid pbias regulator enable on power off
mmc: host: omap_hsmmc: add separate function to set pbias
mmc: host: omap_hsmmc: add separate functions for enable/disable supply
mmc: host: omap_hsmmc: return error if any of the regulator APIs fail
mmc: host: omap_hsmmc: remove unnecessary pbias set_voltage
mmc: host: omap_hsmmc: use mmc_host's vmmc and vqmmc
mmc: host: omap_hsmmc: use the ocrmask provided by the vmmc regulator
mmc: host: omap_hsmmc: cleanup omap_hsmmc_reg_get()
mmc: host: omap_hsmmc: return on fatal errors from omap_hsmmc_reg_get
mmc: host: omap_hsmmc: use devm_regulator_get_optional() for vmmc
mmc: sdhci-of-at91: fix platform_no_drv_owner.cocci warnings
mmc: sh_mmcif: Fix suspend process
mmc: usdhi6rol0: fix error return code
...
Pull SG updates from Jens Axboe:
"This contains a set of scatter-gather related changes/fixes for 4.3:
- Add support for limited chaining of sg tables even for
architectures that do not set ARCH_HAS_SG_CHAIN. From Christoph.
- Add sg chain support to target_rd. From Christoph.
- Fixup open coded sg->page_link in crypto/omap-sham. From
Christoph.
- Fixup open coded crypto ->page_link manipulation. From Dan.
- Also from Dan, automated fixup of manual sg_unmark_end()
manipulations.
- Also from Dan, automated fixup of open coded sg_phys()
implementations.
- From Robert Jarzmik, addition of an sg table splitting helper that
drivers can use"
* 'for-4.3/sg' of git://git.kernel.dk/linux-block:
lib: scatterlist: add sg splitting function
scatterlist: use sg_phys()
crypto/omap-sham: remove an open coded access to ->page_link
scatterlist: remove open coded sg_unmark_end instances
crypto: replace scatterwalk_sg_chain with sg_chain
target/rd: always chain S/G list
scatterlist: allow limited chaining without ARCH_HAS_SG_CHAIN
Pull core block updates from Jens Axboe:
"This first core part of the block IO changes contains:
- Cleanup of the bio IO error signaling from Christoph. We used to
rely on the uptodate bit and passing around of an error, now we
store the error in the bio itself.
- Improvement of the above from myself, by shrinking the bio size
down again to fit in two cachelines on x86-64.
- Revert of the max_hw_sectors cap removal from a revision again,
from Jeff Moyer. This caused performance regressions in various
tests. Reinstate the limit, bump it to a more reasonable size
instead.
- Make /sys/block/<dev>/queue/discard_max_bytes writeable, by me.
Most devices have huge trim limits, which can cause nasty latencies
when deleting files. Enable the admin to configure the size down.
We will look into having a more sane default instead of UINT_MAX
sectors.
- Improvement of the SGP gaps logic from Keith Busch.
- Enable the block core to handle arbitrarily sized bios, which
enables a nice simplification of bio_add_page() (which is an IO hot
path). From Kent.
- Improvements to the partition io stats accounting, making it
faster. From Ming Lei.
- Also from Ming Lei, a basic fixup for overflow of the sysfs pending
file in blk-mq, as well as a fix for a blk-mq timeout race
condition.
- Ming Lin has been carrying Kents above mentioned patches forward
for a while, and testing them. Ming also did a few fixes around
that.
- Sasha Levin found and fixed a use-after-free problem introduced by
the bio->bi_error changes from Christoph.
- Small blk cgroup cleanup from Viresh Kumar"
* 'for-4.3/core' of git://git.kernel.dk/linux-block: (26 commits)
blk: Fix bio_io_vec index when checking bvec gaps
block: Replace SG_GAPS with new queue limits mask
block: bump BLK_DEF_MAX_SECTORS to 2560
Revert "block: remove artifical max_hw_sectors cap"
blk-mq: fix race between timeout and freeing request
blk-mq: fix buffer overflow when reading sysfs file of 'pending'
Documentation: update notes in biovecs about arbitrarily sized bios
block: remove bio_get_nr_vecs()
fs: use helper bio_add_page() instead of open coding on bi_io_vec
block: kill merge_bvec_fn() completely
md/raid5: get rid of bio_fits_rdev()
md/raid5: split bio for chunk_aligned_read
block: remove split code in blkdev_issue_{discard,write_same}
btrfs: remove bio splitting and merge_bvec_fn() calls
bcache: remove driver private bio splitting code
block: simplify bio_add_page()
block: make generic_make_request handle arbitrarily sized bios
blk-cgroup: Drop unlikely before IS_ERR(_OR_NULL)
block: don't access bio->bi_error after bio_put()
block: shrink struct bio down to 2 cache lines again
...
The following panic is captured in ker3.14, but the issue still exists
in latest kernel.
---------------------------------------------------------------------
[ 20.738217] c0 3136 (Compiler) Unable to handle kernel NULL pointer dereference
at virtual address 00000578
......
[ 20.738499] c0 3136 (Compiler) PC is at _raw_spin_lock_irqsave+0x24/0x60
[ 20.738527] c0 3136 (Compiler) LR is at _raw_spin_lock_irqsave+0x20/0x60
[ 20.740134] c0 3136 (Compiler) Call trace:
[ 20.740165] c0 3136 (Compiler) [<ffffffc0008ee900>] _raw_spin_lock_irqsave+0x24/0x60
[ 20.740200] c0 3136 (Compiler) [<ffffffc0000dd024>] __wake_up+0x1c/0x54
[ 20.740230] c0 3136 (Compiler) [<ffffffc000639414>] mmc_wait_data_done+0x28/0x34
[ 20.740262] c0 3136 (Compiler) [<ffffffc0006391a0>] mmc_request_done+0xa4/0x220
[ 20.740314] c0 3136 (Compiler) [<ffffffc000656894>] sdhci_tasklet_finish+0xac/0x264
[ 20.740352] c0 3136 (Compiler) [<ffffffc0000a2b58>] tasklet_action+0xa0/0x158
[ 20.740382] c0 3136 (Compiler) [<ffffffc0000a2078>] __do_softirq+0x10c/0x2e4
[ 20.740411] c0 3136 (Compiler) [<ffffffc0000a24bc>] irq_exit+0x8c/0xc0
[ 20.740439] c0 3136 (Compiler) [<ffffffc00008489c>] handle_IRQ+0x48/0xac
[ 20.740469] c0 3136 (Compiler) [<ffffffc000081428>] gic_handle_irq+0x38/0x7c
----------------------------------------------------------------------
Because in SMP, "mrq" has race condition between below two paths:
path1: CPU0: <tasklet context>
static void mmc_wait_data_done(struct mmc_request *mrq)
{
mrq->host->context_info.is_done_rcv = true;
//
// If CPU0 has just finished "is_done_rcv = true" in path1, and at
// this moment, IRQ or ICache line missing happens in CPU0.
// What happens in CPU1 (path2)?
//
// If the mmcqd thread in CPU1(path2) hasn't entered to sleep mode:
// path2 would have chance to break from wait_event_interruptible
// in mmc_wait_for_data_req_done and continue to run for next
// mmc_request (mmc_blk_rw_rq_prep).
//
// Within mmc_blk_rq_prep, mrq is cleared to 0.
// If below line still gets host from "mrq" as the result of
// compiler, the panic happens as we traced.
wake_up_interruptible(&mrq->host->context_info.wait);
}
path2: CPU1: <The mmcqd thread runs mmc_queue_thread>
static int mmc_wait_for_data_req_done(...
{
...
while (1) {
wait_event_interruptible(context_info->wait,
(context_info->is_done_rcv ||
context_info->is_new_req));
static void mmc_blk_rw_rq_prep(...
{
...
memset(brq, 0, sizeof(struct mmc_blk_request));
This issue happens very coincidentally; however adding mdelay(1) in
mmc_wait_data_done as below could duplicate it easily.
static void mmc_wait_data_done(struct mmc_request *mrq)
{
mrq->host->context_info.is_done_rcv = true;
+ mdelay(1);
wake_up_interruptible(&mrq->host->context_info.wait);
}
At runtime, IRQ or ICache line missing may just happen at the same place
of the mdelay(1).
This patch gets the mmc_context_info at the beginning of function, it can
avoid this race condition.
Signed-off-by: Jialing Fu <jlfu@marvell.com>
Tested-by: Shawn Lin <shawn.lin@rock-chips.com>
Fixes: 2220eedfd7 ("mmc: fix async request mechanism ....")
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Now that support for platforms which have optional regulator is added,
remove CONFIG_REGULATOR check in omap_hsmmc.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
vdd voltage is set in mmc core to ios->vdd and vmmc should actually
be set to this voltage. Modify omap_hsmmc_enable_supply
to not take vdd as argument since now it's directly set to
the voltage in ios->vdd.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Use regulator_is_enabled of pbias regulator to find pbias regulator
status instead of maintaining a custom bookkeeping
pbias_enabled variable.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
enable vmmc_aux regulator only if it is in disabled state and disable
vmmc_aux regulator only if it is in enabled state.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
If the regulator is enabled on boot (checked using regulator_is_enabled),
invoke regulator_enable() so that the usecount reflects the correct
state of the regulator and then disable the regulator so that the
initial state of the regulator is disabled. Avoid using ->set_power,
since set_power also takes care of setting the voltages which is not
needed at this point.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Fix omap_hsmmc_set_power so that pbias regulator is not enabled
during power off.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
No functional change. Cleanup omap_hsmmc_set_power by adding separate
functions to set pbias and invoke it from omap_hsmmc_set_power.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
No functional change. Cleanup omap_hsmmc_set_power by adding separate
functions for enable/disable supply and invoke it from
omap_hsmmc_set_power.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Return error if any of the regulator APIs (regulator_enable,
regulator_disable, regulator_set_voltage) fails in
omap_hsmmc_set_power to avoid undefined behavior.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Remove the unnecessary pbias regulator_set_voltage done after
pbias regulator_disable in omap_hsmmc_set_power.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
No functional change. Instead of using omap_hsmmc_host's vcc and vcc_aux
members, use vmmc and vqmmc present in mmc_host which is present
for the same purpose.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
If the vmmc regulator provides a valid ocrmask, use it. By this even if
the pdata has a valid ocrmask, it will be overwritten with the ocrmask
of the vmmc regulator.
Also remove the unnecessary compatibility check between the ocrmask in
the pdata and the ocrmask from the vmmc regulator.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
No functional change. Instead of using a local regulator variable
in omap_hsmmc_reg_get() for holding the return value of
devm_regulator_get_optional() and then assigning to omap_hsmmc_host
regulator members: vcc, vcc_aux and pbias, directly use the
omap_hsmmc_host regulator members.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Now return error only if the return value of
devm_regulator_get_optional() is not the same as -ENODEV, since with
-EPROBE_DEFER, the regulator can be obtained later and all other
errors are fatal.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Since vmmc can be optional for some platforms, use
devm_regulator_get_optional() for vmmc. Now return error only
if the return value of devm_regulator_get_optional() is not the
same as -ENODEV, since with -EPROBE_DEFER, the regulator can be
obtained later and all other errors are fatal.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
CC: ludovic.desroches@atmel.com <ludovic.desroches@atmel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The clock should be enable when SDHI registers are accessed.
Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Propagate error code on failure.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Return a negative error code on failure.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The intent appears to be to clear only the bits which are set in status
(by setting them to zero in the ack write), like in the other interrupt
handlers, and not to always clear everything (by always writing zero).
Use the correct not operator.
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
host->sg is only set when we're transferring multiple blocks. Check for
its availibility before dereferencing it in the timeout work debug
print.
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We ignore errors from mmc_regulator_get_supply() because the usage of
the regulators is optional for the driver, but we still need to check
for and handle EPROBE_DEFER, like it's done in for example dw_mmc.
Otherwise we might end up not using the specified regulators just
because of probe order.
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This patch adds the compatible string in sdhci-of-arasan.c to
support sdhci-arasan5.1 version of controller. No documented
controller IP version is found in the TRM, so we use ths version
of command queueing engine integrated into this controller by arasan
to specify our controller.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
commit bb8175a8aa ("mmc: sdhci: clarify DDR timing mode between
SD-UHS and eMMC") added MMC_DDR52 as eMMC's DDR mode to be
distinguished from SD-UHS, but it missed setting driver type for
MMC_DDR52 timing mode.
So sometimes we get the following error on Marvell BG2Q DMP board:
[ 1.559598] mmcblk0: error -84 transferring data, sector 0, nr 8, cmd
response 0x900, card status 0xb00
[ 1.569314] mmcblk0: retrying using single block read
[ 1.575676] mmcblk0: error -84 transferring data, sector 2, nr 6, cmd
response 0x900, card status 0x0
[ 1.585202] blk_update_request: I/O error, dev mmcblk0, sector 2
[ 1.591818] mmcblk0: error -84 transferring data, sector 3, nr 5, cmd
response 0x900, card status 0x0
[ 1.601341] blk_update_request: I/O error, dev mmcblk0, sector 3
This patches fixes this by adding the missing driver type setting.
Fixes: bb8175a8aa ("mmc: sdhci: clarify DDR timing mode ...")
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The 250ms timeout is too short.
On my system enabling the oclk takes under 50ms and disabling slightly
over 100ms when idle. Under load disabling the clock can take over
350ms.
This does not make mmc clock gating look like good option to have on
sunxi but the system should not crash with mmc clock gating enabled
nonetheless.
This patch sets the timeout to 750ms.
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
the current quirk set is for an old FPGA, and this patch corrects
quirks according to real SoC.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
For some mass production of kingston eMMCs which adopt Phison's
firmware will meet an unrecoverable data conrruption occasionally
if performing trim due to a firmware bug confirmed by vendor. We
found it on Intel-C3230RK platform. So we add fixup of broken trim
for it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
By default, for all imx SoC types, the watermark level is 16, and the
burst length is 8. But if the SDIO/SD/MMC I/O speed is fast enough,
this default watermark level and burst length will be the performance
bottleneck.
For example, i.MX7D support eMMC HS400 mode, this mode can run in 8 bit,
200MHZ DDR mode. So the I/O speed improve a lot compare to SD3.0.
The default burst length is 8, if we don't change this value, in
HS400 mode, when we do eMMC read operation, we can find that the
clock signal will stop for a period of time. This means the speed
of data moving on AHB bus is slower than I/O speed. So we should
improve the speed of data moving on AHB bus.
This patch set the default burst length as 16, and set the default
watermark level as 64. The test result is the clock signal has
no stop during the eMMC HS400 operation.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Acked-by: Dong Aisheng <aisheng.dong@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Currently we find that if a usdhc is choosed to boot system, then ROM
code will set the burst length enable bit of this usdhc as 0.
This will make performance drop a lot if this usdhc's burst length is
configed. So this patch set back the burst_length_enable bit as 1,
which is the default value, and means burst length is enabled for INCR.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Acked-by: Dong Aisheng <aisheng.dong@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
tuning-step is the delay cell steps in tuning procedure. The default value
of tuning-step is 1. Some boards or cards need another value to pass the
tuning procedure. For example, imx7d-sdb board need the tuning-step value
as 2, otherwise it can't pass the tuning procedure.
So this patch add the tuning-step setting in driver, so that user can set
the tuning-step value in dts.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Acked-by: Dong Aisheng <aisheng.dong@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The imx7d usdhc is derived from imx6sx, the difference is that
imx7d support HS400.
So introduce a new compatible string for imx7d and add HS400
support for imx7d usdhc.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Acked-by: Dong Aisheng <aisheng.dong@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
For eSDHC(version < 2.3), the pre divider only could divide base clock
by 2 at least. Add workaround for this to avoid unexpected issue.
Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Fixes: bd455029d0 ("mmc: sdhci-of-esdhc: Pre divider starts at 1")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Currently one mrq->data maybe execute dma_map_sg() twice
when mmc subsystem prepare over one new request, and the
following log show up:
sdhci[sdhci_pre_dma_transfer] invalid cookie: 24, next-cookie 25
In this condition, mrq->date map a dma-memory(1) in sdhci_pre_req
for the first time, and map another dma-memory(2) in sdhci_prepare_data
for the second time. But driver only unmap the dma-memory(2), and
dma-memory(1) never unmapped, which cause the dma memory leak issue.
This patch use another method to map the dma memory for the mrq->data
which can fix this dma memory leak issue.
Fixes: 348487cb28 ("mmc: sdhci: use pipeline mmc requests to improve performance")
Reported-and-tested-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Use more compact of_property_read_bool() calls instead of the
of_find_property() calls.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This patch fixes MMC not working issue on O2Micro/BayHub Host, which
requires transfer mode register to be cleared when sending no DMA
command.
Signed-off-by: Peter Guo <peter.guo@bayhubtech.com>
Signed-off-by: Adam Lee <adam.lee@canonical.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
When requesting a trim for several bytes, everything up to the next
erase-group is erased. This causes data corruption.
Signed-off-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Fix the problem which timeout occurs at the time of command request with
several cards.
The timeout value was insufficient as a verification of several cards,
so it was changed 5 seconds from 2 seconds.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Introduce driver for he Atmel SDMMC available on sama5d2. It is a sdhci
compliant controller.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
In programmable mode, if the clock frequency is too high, the divider
can be too small to meet the clock frequency requirement especially to
init the SD card. In this case, switch to the divided clock mode.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
[hch: split from a larger patch by Dan]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This patch add a new quirk to add a s/w timer to notify the driver
to terminate current transfer and report a data timeout to the core,
if DTO interrupt does NOT come within the given time.
dw_mmc call mmc_request_done func to finish transfer depends on
DTO interrupt. If DTO interrupt does not come in sending data state,
the current transfer will be blocked.
We got the reply from synopsys:
There are two counters but both use the same value of [31:8] bits.
Data timeout counter doesn't wait for stop clock and you should get
DRTO even when the clock is not stopped.
Host Starvation timeout counter is triggered with stop clock condition.
This means that host should get DRTO and DTO interrupt.
But this case really exists, when driver reads tuning data from
card on RK3288-pink2 board. I measured waveforms by oscilloscope
and found that card clock was always on and data lines were always
holded high level in sending data state.
There are two possibility that data over interrupt doesn't come in
reading data state on RK3X SoCs:
- get command done interrupt, but doesn't get any data-related interrupt.
- get data error interrupt, but doesn't get data over interrupt.
Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
