2007-05-19 19:06:24 +07:00
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/*
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* linux/drivers/mmc/core/host.c
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*
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* Copyright (C) 2003 Russell King, All Rights Reserved.
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2008-03-09 05:43:19 +07:00
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* Copyright (C) 2007-2008 Pierre Ossman
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2010-11-09 09:36:50 +07:00
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* Copyright (C) 2010 Linus Walleij
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2007-05-19 19:06:24 +07:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* MMC host class device management
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/idr.h>
|
2013-02-16 22:21:16 +07:00
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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2007-05-19 19:06:24 +07:00
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#include <linux/pagemap.h>
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2011-07-10 23:42:00 +07:00
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#include <linux/export.h>
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2007-09-24 12:15:48 +07:00
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#include <linux/leds.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 15:04:11 +07:00
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#include <linux/slab.h>
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2007-05-19 19:06:24 +07:00
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#include <linux/mmc/host.h>
|
2010-11-09 09:36:50 +07:00
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#include <linux/mmc/card.h>
|
2013-02-16 22:21:16 +07:00
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#include <linux/mmc/slot-gpio.h>
|
2007-05-19 19:06:24 +07:00
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#include "core.h"
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#include "host.h"
|
2014-12-18 21:44:36 +07:00
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#include "slot-gpio.h"
|
2014-11-28 20:38:36 +07:00
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#include "pwrseq.h"
|
mmc: sdio: Add API to manage SDIO IRQs from a workqueue
For hosts not supporting MMC_CAP2_SDIO_IRQ_NOTHREAD but MMC_CAP_SDIO_IRQ,
the SDIO IRQs are processed from a dedicated kernel thread. For these
cases, the host calls mmc_signal_sdio_irq() from its ISR to signal a new
SDIO IRQ.
Signaling an SDIO IRQ makes the host's ->enable_sdio_irq() callback to be
invoked to temporary disable the IRQs, before the kernel thread is woken up
to process it. When processing of the IRQs are completed, they are
re-enabled by the kernel thread, again via invoking the host's
->enable_sdio_irq().
The observation from this, is that the execution path is being unnecessary
complex, as the host driver already knows that it needs to temporary
disable the IRQs before signaling a new one. Moreover, replacing the kernel
thread with a work/workqueue would not only greatly simplify the code, but
also make it more robust.
To address the above problems, let's continue to build upon the support for
MMC_CAP2_SDIO_IRQ_NOTHREAD, as it already implements SDIO IRQs to be
processed without using the clumsy kernel thread and without the ping-pong
calls of the host's ->enable_sdio_irq() callback for each processed IRQ.
Therefore, let's add new API sdio_signal_irq(), which enables hosts to
signal/process SDIO IRQs by using a work/workqueue, rather than using the
kernel thread.
Add also a new host callback ->ack_sdio_irq(), which the work invokes when
the SDIO IRQs have been processed. This informs the host about when it
shall re-enable the SDIO IRQs. Potentially, we could re-use the existing
->enable_sdio_irq() callback instead of adding a new one, however it has
turned out that it's more convenient for hosts to get this information via
a separate callback.
Hosts that wants to use this new method to signal/process SDIO IRQs, must
enable MMC_CAP2_SDIO_IRQ_NOTHREAD and implement the ->ack_sdio_irq()
callback.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
2017-04-13 21:48:11 +07:00
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|
#include "sdio_ops.h"
|
2007-05-19 19:06:24 +07:00
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#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
|
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|
2016-04-07 16:40:59 +07:00
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static DEFINE_IDA(mmc_host_ida);
|
2014-12-18 21:44:35 +07:00
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|
2007-05-19 19:06:24 +07:00
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static void mmc_host_classdev_release(struct device *dev)
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|
|
|
{
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|
struct mmc_host *host = cls_dev_to_mmc_host(dev);
|
2017-01-28 15:32:35 +07:00
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ida_simple_remove(&mmc_host_ida, host->index);
|
2007-05-19 19:06:24 +07:00
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kfree(host);
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}
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static struct class mmc_host_class = {
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.name = "mmc_host",
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.dev_release = mmc_host_classdev_release,
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};
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int mmc_register_host_class(void)
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{
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return class_register(&mmc_host_class);
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}
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void mmc_unregister_host_class(void)
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{
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class_unregister(&mmc_host_class);
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}
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|
2015-05-07 17:10:12 +07:00
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void mmc_retune_enable(struct mmc_host *host)
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{
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host->can_retune = 1;
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if (host->retune_period)
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mod_timer(&host->retune_timer,
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jiffies + host->retune_period * HZ);
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}
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|
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|
2016-05-16 19:35:24 +07:00
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|
|
/*
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* Pause re-tuning for a small set of operations. The pause begins after the
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* next command and after first doing re-tuning.
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*/
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void mmc_retune_pause(struct mmc_host *host)
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{
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if (!host->retune_paused) {
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host->retune_paused = 1;
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mmc_retune_needed(host);
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mmc_retune_hold(host);
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}
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}
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EXPORT_SYMBOL(mmc_retune_pause);
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void mmc_retune_unpause(struct mmc_host *host)
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{
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if (host->retune_paused) {
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host->retune_paused = 0;
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mmc_retune_release(host);
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}
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}
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EXPORT_SYMBOL(mmc_retune_unpause);
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|
2015-05-07 17:10:12 +07:00
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void mmc_retune_disable(struct mmc_host *host)
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{
|
2016-05-16 19:35:24 +07:00
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mmc_retune_unpause(host);
|
2015-05-07 17:10:12 +07:00
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host->can_retune = 0;
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del_timer_sync(&host->retune_timer);
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host->retune_now = 0;
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host->need_retune = 0;
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}
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void mmc_retune_timer_stop(struct mmc_host *host)
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{
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del_timer_sync(&host->retune_timer);
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}
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EXPORT_SYMBOL(mmc_retune_timer_stop);
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void mmc_retune_hold(struct mmc_host *host)
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{
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if (!host->hold_retune)
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host->retune_now = 1;
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host->hold_retune += 1;
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}
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|
2017-08-10 19:08:06 +07:00
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void mmc_retune_hold_now(struct mmc_host *host)
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{
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host->retune_now = 0;
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host->hold_retune += 1;
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}
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|
2015-05-07 17:10:12 +07:00
|
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void mmc_retune_release(struct mmc_host *host)
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{
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if (host->hold_retune)
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host->hold_retune -= 1;
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else
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WARN_ON(1);
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}
|
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int mmc_retune(struct mmc_host *host)
|
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{
|
2015-05-07 17:10:20 +07:00
|
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bool return_to_hs400 = false;
|
2015-05-07 17:10:12 +07:00
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int err;
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if (host->retune_now)
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host->retune_now = 0;
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else
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return 0;
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if (!host->need_retune || host->doing_retune || !host->card)
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return 0;
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host->need_retune = 0;
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host->doing_retune = 1;
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|
2015-05-07 17:10:20 +07:00
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if (host->ios.timing == MMC_TIMING_MMC_HS400) {
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err = mmc_hs400_to_hs200(host->card);
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if (err)
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goto out;
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return_to_hs400 = true;
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if (host->ops->prepare_hs400_tuning)
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host->ops->prepare_hs400_tuning(host, &host->ios);
|
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}
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|
2015-05-07 17:10:12 +07:00
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err = mmc_execute_tuning(host->card);
|
2015-05-07 17:10:20 +07:00
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if (err)
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goto out;
|
2015-05-07 17:10:12 +07:00
|
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|
2015-05-07 17:10:20 +07:00
|
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if (return_to_hs400)
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err = mmc_hs200_to_hs400(host->card);
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out:
|
2015-05-07 17:10:12 +07:00
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host->doing_retune = 0;
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return err;
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}
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static void mmc_retune_timer(unsigned long data)
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{
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struct mmc_host *host = (struct mmc_host *)data;
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|
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mmc_retune_needed(host);
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}
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|
2013-02-16 22:21:16 +07:00
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|
|
/**
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* mmc_of_parse() - parse host's device-tree node
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* @host: host whose node should be parsed.
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|
*
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|
|
|
|
* To keep the rest of the MMC subsystem unaware of whether DT has been
|
|
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|
* used to to instantiate and configure this host instance or not, we
|
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|
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* parse the properties and set respective generic mmc-host flags and
|
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* parameters.
|
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|
|
*/
|
2013-06-10 03:14:11 +07:00
|
|
|
int mmc_of_parse(struct mmc_host *host)
|
2013-02-16 22:21:16 +07:00
|
|
|
{
|
2017-05-27 04:53:21 +07:00
|
|
|
struct device *dev = host->parent;
|
2013-02-16 22:21:16 +07:00
|
|
|
u32 bus_width;
|
2015-08-07 05:06:48 +07:00
|
|
|
int ret;
|
2014-11-05 07:22:41 +07:00
|
|
|
bool cd_cap_invert, cd_gpio_invert = false;
|
|
|
|
|
bool ro_cap_invert, ro_gpio_invert = false;
|
2013-02-16 22:21:16 +07:00
|
|
|
|
2017-05-27 04:53:21 +07:00
|
|
|
if (!dev || !dev_fwnode(dev))
|
2013-06-10 03:14:11 +07:00
|
|
|
return 0;
|
2013-02-16 22:21:16 +07:00
|
|
|
|
|
|
|
|
/* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_u32(dev, "bus-width", &bus_width) < 0) {
|
2013-02-16 22:21:16 +07:00
|
|
|
dev_dbg(host->parent,
|
|
|
|
|
"\"bus-width\" property is missing, assuming 1 bit.\n");
|
|
|
|
|
bus_width = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (bus_width) {
|
|
|
|
|
case 8:
|
|
|
|
|
host->caps |= MMC_CAP_8_BIT_DATA;
|
|
|
|
|
/* Hosts capable of 8-bit transfers can also do 4 bits */
|
|
|
|
|
case 4:
|
|
|
|
|
host->caps |= MMC_CAP_4_BIT_DATA;
|
|
|
|
|
break;
|
|
|
|
|
case 1:
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
dev_err(host->parent,
|
2014-02-15 18:40:58 +07:00
|
|
|
"Invalid \"bus-width\" value %u!\n", bus_width);
|
2013-06-10 03:14:11 +07:00
|
|
|
return -EINVAL;
|
2013-02-16 22:21:16 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* f_max is obtained from the optional "max-frequency" property */
|
2017-05-27 04:53:21 +07:00
|
|
|
device_property_read_u32(dev, "max-frequency", &host->f_max);
|
2013-02-16 22:21:16 +07:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Configure CD and WP pins. They are both by default active low to
|
|
|
|
|
* match the SDHCI spec. If GPIOs are provided for CD and / or WP, the
|
|
|
|
|
* mmc-gpio helpers are used to attach, configure and use them. If
|
|
|
|
|
* polarity inversion is specified in DT, one of MMC_CAP2_CD_ACTIVE_HIGH
|
|
|
|
|
* and MMC_CAP2_RO_ACTIVE_HIGH capability-2 flags is set. If the
|
|
|
|
|
* "broken-cd" property is provided, the MMC_CAP_NEEDS_POLL capability
|
|
|
|
|
* is set. If the "non-removable" property is found, the
|
|
|
|
|
* MMC_CAP_NONREMOVABLE capability is set and no card-detection
|
|
|
|
|
* configuration is performed.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* Parse Card Detection */
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "non-removable")) {
|
2013-02-16 22:21:16 +07:00
|
|
|
host->caps |= MMC_CAP_NONREMOVABLE;
|
|
|
|
|
} else {
|
2017-05-27 04:53:21 +07:00
|
|
|
cd_cap_invert = device_property_read_bool(dev, "cd-inverted");
|
2013-02-16 22:21:16 +07:00
|
|
|
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "broken-cd"))
|
2013-02-16 22:21:16 +07:00
|
|
|
host->caps |= MMC_CAP_NEEDS_POLL;
|
|
|
|
|
|
2014-10-02 14:08:46 +07:00
|
|
|
ret = mmc_gpiod_request_cd(host, "cd", 0, true,
|
2014-11-05 07:22:41 +07:00
|
|
|
0, &cd_gpio_invert);
|
2014-12-18 16:41:44 +07:00
|
|
|
if (!ret)
|
2014-08-27 18:00:52 +07:00
|
|
|
dev_info(host->parent, "Got CD GPIO\n");
|
2015-09-14 17:18:55 +07:00
|
|
|
else if (ret != -ENOENT && ret != -ENOSYS)
|
2014-12-18 16:41:44 +07:00
|
|
|
return ret;
|
2014-10-02 14:08:46 +07:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* There are two ways to flag that the CD line is inverted:
|
|
|
|
|
* through the cd-inverted flag and by the GPIO line itself
|
|
|
|
|
* being inverted from the GPIO subsystem. This is a leftover
|
|
|
|
|
* from the times when the GPIO subsystem did not make it
|
|
|
|
|
* possible to flag a line as inverted.
|
|
|
|
|
*
|
|
|
|
|
* If the capability on the host AND the GPIO line are
|
|
|
|
|
* both inverted, the end result is that the CD line is
|
|
|
|
|
* not inverted.
|
|
|
|
|
*/
|
2014-11-05 07:22:41 +07:00
|
|
|
if (cd_cap_invert ^ cd_gpio_invert)
|
2014-10-02 14:08:46 +07:00
|
|
|
host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
|
2013-02-16 22:21:16 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Parse Write Protection */
|
2017-05-27 04:53:21 +07:00
|
|
|
ro_cap_invert = device_property_read_bool(dev, "wp-inverted");
|
2013-02-16 22:21:16 +07:00
|
|
|
|
2014-11-05 07:22:41 +07:00
|
|
|
ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert);
|
2014-12-18 16:41:44 +07:00
|
|
|
if (!ret)
|
2014-08-27 18:00:52 +07:00
|
|
|
dev_info(host->parent, "Got WP GPIO\n");
|
2015-09-14 17:18:55 +07:00
|
|
|
else if (ret != -ENOENT && ret != -ENOSYS)
|
2014-12-18 16:41:44 +07:00
|
|
|
return ret;
|
2013-02-15 22:14:01 +07:00
|
|
|
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "disable-wp"))
|
2015-05-07 01:31:20 +07:00
|
|
|
host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
|
|
|
|
|
|
2014-10-02 14:08:46 +07:00
|
|
|
/* See the comment on CD inversion above */
|
2014-11-05 07:22:41 +07:00
|
|
|
if (ro_cap_invert ^ ro_gpio_invert)
|
2014-10-02 14:08:46 +07:00
|
|
|
host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
|
|
|
|
|
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "cap-sd-highspeed"))
|
2013-02-15 22:14:01 +07:00
|
|
|
host->caps |= MMC_CAP_SD_HIGHSPEED;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "cap-mmc-highspeed"))
|
2013-02-15 22:14:01 +07:00
|
|
|
host->caps |= MMC_CAP_MMC_HIGHSPEED;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "sd-uhs-sdr12"))
|
2014-02-14 19:27:07 +07:00
|
|
|
host->caps |= MMC_CAP_UHS_SDR12;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "sd-uhs-sdr25"))
|
2014-02-14 19:27:07 +07:00
|
|
|
host->caps |= MMC_CAP_UHS_SDR25;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "sd-uhs-sdr50"))
|
2014-02-14 19:27:07 +07:00
|
|
|
host->caps |= MMC_CAP_UHS_SDR50;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "sd-uhs-sdr104"))
|
2014-02-14 19:27:07 +07:00
|
|
|
host->caps |= MMC_CAP_UHS_SDR104;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "sd-uhs-ddr50"))
|
2014-02-14 19:27:07 +07:00
|
|
|
host->caps |= MMC_CAP_UHS_DDR50;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "cap-power-off-card"))
|
2013-02-15 22:14:01 +07:00
|
|
|
host->caps |= MMC_CAP_POWER_OFF_CARD;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "cap-mmc-hw-reset"))
|
2015-10-27 13:24:21 +07:00
|
|
|
host->caps |= MMC_CAP_HW_RESET;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "cap-sdio-irq"))
|
2013-02-15 22:14:01 +07:00
|
|
|
host->caps |= MMC_CAP_SDIO_IRQ;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "full-pwr-cycle"))
|
2013-06-10 22:03:47 +07:00
|
|
|
host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "keep-power-in-suspend"))
|
2013-02-15 22:14:01 +07:00
|
|
|
host->pm_caps |= MMC_PM_KEEP_POWER;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "wakeup-source") ||
|
|
|
|
|
device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
|
2013-02-15 22:14:01 +07:00
|
|
|
host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
|
2017-01-25 18:45:43 +07:00
|
|
|
host->caps |= MMC_CAP_3_3V_DDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
|
2014-02-14 19:27:08 +07:00
|
|
|
host->caps |= MMC_CAP_1_8V_DDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-ddr-1_2v"))
|
2014-02-14 19:27:08 +07:00
|
|
|
host->caps |= MMC_CAP_1_2V_DDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-hs200-1_8v"))
|
2014-02-14 19:27:09 +07:00
|
|
|
host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-hs200-1_2v"))
|
2014-02-14 19:27:09 +07:00
|
|
|
host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-hs400-1_8v"))
|
2014-04-23 15:15:08 +07:00
|
|
|
host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-hs400-1_2v"))
|
2014-04-23 15:15:08 +07:00
|
|
|
host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "mmc-hs400-enhanced-strobe"))
|
2016-05-26 08:56:12 +07:00
|
|
|
host->caps2 |= MMC_CAP2_HS400_ES;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "no-sdio"))
|
2016-07-14 15:26:04 +07:00
|
|
|
host->caps2 |= MMC_CAP2_NO_SDIO;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "no-sd"))
|
2016-07-14 15:26:04 +07:00
|
|
|
host->caps2 |= MMC_CAP2_NO_SD;
|
2017-05-27 04:53:21 +07:00
|
|
|
if (device_property_read_bool(dev, "no-mmc"))
|
2016-07-14 15:26:04 +07:00
|
|
|
host->caps2 |= MMC_CAP2_NO_MMC;
|
2013-06-10 03:14:11 +07:00
|
|
|
|
2017-05-27 04:53:21 +07:00
|
|
|
host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr);
|
2014-08-19 15:45:51 +07:00
|
|
|
if (host->dsr_req && (host->dsr & ~0xffff)) {
|
|
|
|
|
dev_err(host->parent,
|
|
|
|
|
"device tree specified broken value for DSR: 0x%x, ignoring\n",
|
|
|
|
|
host->dsr);
|
|
|
|
|
host->dsr_req = 0;
|
|
|
|
|
}
|
|
|
|
|
|
2014-11-28 20:38:36 +07:00
|
|
|
return mmc_pwrseq_alloc(host);
|
2013-02-16 22:21:16 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(mmc_of_parse);
|
|
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
/**
|
|
|
|
|
* mmc_alloc_host - initialise the per-host structure.
|
|
|
|
|
* @extra: sizeof private data structure
|
|
|
|
|
* @dev: pointer to host device model structure
|
|
|
|
|
*
|
|
|
|
|
* Initialise the per-host structure.
|
|
|
|
|
*/
|
|
|
|
|
struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
|
|
|
|
|
{
|
2008-03-09 05:43:19 +07:00
|
|
|
int err;
|
2007-05-19 19:06:24 +07:00
|
|
|
struct mmc_host *host;
|
|
|
|
|
|
2007-08-11 04:00:50 +07:00
|
|
|
host = kzalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
|
2007-05-19 19:06:24 +07:00
|
|
|
if (!host)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
2012-06-14 15:17:39 +07:00
|
|
|
/* scanning will be enabled when we're ready */
|
|
|
|
|
host->rescan_disable = 1;
|
2016-04-07 16:40:59 +07:00
|
|
|
|
2017-01-28 15:32:35 +07:00
|
|
|
err = ida_simple_get(&mmc_host_ida, 0, 0, GFP_KERNEL);
|
|
|
|
|
if (err < 0) {
|
2016-04-07 16:40:59 +07:00
|
|
|
kfree(host);
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
2017-01-28 15:32:35 +07:00
|
|
|
host->index = err;
|
2008-03-09 05:43:19 +07:00
|
|
|
|
2008-11-09 03:37:46 +07:00
|
|
|
dev_set_name(&host->class_dev, "mmc%d", host->index);
|
2008-03-09 05:43:19 +07:00
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
host->parent = dev;
|
|
|
|
|
host->class_dev.parent = dev;
|
|
|
|
|
host->class_dev.class = &mmc_host_class;
|
|
|
|
|
device_initialize(&host->class_dev);
|
2016-01-22 10:32:18 +07:00
|
|
|
device_enable_async_suspend(&host->class_dev);
|
2007-05-19 19:06:24 +07:00
|
|
|
|
2014-12-18 21:44:36 +07:00
|
|
|
if (mmc_gpio_alloc(host)) {
|
|
|
|
|
put_device(&host->class_dev);
|
2017-01-28 15:32:50 +07:00
|
|
|
ida_simple_remove(&mmc_host_ida, host->index);
|
|
|
|
|
kfree(host);
|
2014-12-18 21:44:36 +07:00
|
|
|
return NULL;
|
|
|
|
|
}
|
2010-11-09 09:36:50 +07:00
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
spin_lock_init(&host->lock);
|
|
|
|
|
init_waitqueue_head(&host->wq);
|
|
|
|
|
INIT_DELAYED_WORK(&host->detect, mmc_rescan);
|
mmc: sdio: Add API to manage SDIO IRQs from a workqueue
For hosts not supporting MMC_CAP2_SDIO_IRQ_NOTHREAD but MMC_CAP_SDIO_IRQ,
the SDIO IRQs are processed from a dedicated kernel thread. For these
cases, the host calls mmc_signal_sdio_irq() from its ISR to signal a new
SDIO IRQ.
Signaling an SDIO IRQ makes the host's ->enable_sdio_irq() callback to be
invoked to temporary disable the IRQs, before the kernel thread is woken up
to process it. When processing of the IRQs are completed, they are
re-enabled by the kernel thread, again via invoking the host's
->enable_sdio_irq().
The observation from this, is that the execution path is being unnecessary
complex, as the host driver already knows that it needs to temporary
disable the IRQs before signaling a new one. Moreover, replacing the kernel
thread with a work/workqueue would not only greatly simplify the code, but
also make it more robust.
To address the above problems, let's continue to build upon the support for
MMC_CAP2_SDIO_IRQ_NOTHREAD, as it already implements SDIO IRQs to be
processed without using the clumsy kernel thread and without the ping-pong
calls of the host's ->enable_sdio_irq() callback for each processed IRQ.
Therefore, let's add new API sdio_signal_irq(), which enables hosts to
signal/process SDIO IRQs by using a work/workqueue, rather than using the
kernel thread.
Add also a new host callback ->ack_sdio_irq(), which the work invokes when
the SDIO IRQs have been processed. This informs the host about when it
shall re-enable the SDIO IRQs. Potentially, we could re-use the existing
->enable_sdio_irq() callback instead of adding a new one, however it has
turned out that it's more convenient for hosts to get this information via
a separate callback.
Hosts that wants to use this new method to signal/process SDIO IRQs, must
enable MMC_CAP2_SDIO_IRQ_NOTHREAD and implement the ->ack_sdio_irq()
callback.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
2017-04-13 21:48:11 +07:00
|
|
|
INIT_DELAYED_WORK(&host->sdio_irq_work, sdio_irq_work);
|
2015-05-07 17:10:12 +07:00
|
|
|
setup_timer(&host->retune_timer, mmc_retune_timer, (unsigned long)host);
|
2007-05-19 19:06:24 +07:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* By default, hosts do not support SGIO or large requests.
|
|
|
|
|
* They have to set these according to their abilities.
|
|
|
|
|
*/
|
2010-09-10 12:33:59 +07:00
|
|
|
host->max_segs = 1;
|
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 19:29:47 +07:00
|
|
|
host->max_seg_size = PAGE_SIZE;
|
2007-05-19 19:06:24 +07:00
|
|
|
|
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 19:29:47 +07:00
|
|
|
host->max_req_size = PAGE_SIZE;
|
2007-05-19 19:06:24 +07:00
|
|
|
host->max_blk_size = 512;
|
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 19:29:47 +07:00
|
|
|
host->max_blk_count = PAGE_SIZE / 512;
|
2007-05-19 19:06:24 +07:00
|
|
|
|
|
|
|
|
return host;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(mmc_alloc_host);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* mmc_add_host - initialise host hardware
|
|
|
|
|
* @host: mmc host
|
2007-07-12 01:22:11 +07:00
|
|
|
*
|
|
|
|
|
* Register the host with the driver model. The host must be
|
|
|
|
|
* prepared to start servicing requests before this function
|
|
|
|
|
* completes.
|
2007-05-19 19:06:24 +07:00
|
|
|
*/
|
|
|
|
|
int mmc_add_host(struct mmc_host *host)
|
|
|
|
|
{
|
|
|
|
|
int err;
|
|
|
|
|
|
2007-07-24 13:09:39 +07:00
|
|
|
WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
|
|
|
|
|
!host->ops->enable_sdio_irq);
|
|
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
err = device_add(&host->class_dev);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
|
|
|
|
|
2011-04-11 11:11:29 +07:00
|
|
|
led_trigger_register_simple(dev_name(&host->class_dev), &host->led);
|
|
|
|
|
|
2008-07-24 19:18:57 +07:00
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
mmc_add_host_debugfs(host);
|
|
|
|
|
#endif
|
|
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
mmc_start_host(host);
|
2015-11-05 22:11:12 +07:00
|
|
|
mmc_register_pm_notifier(host);
|
2007-05-19 19:06:24 +07:00
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(mmc_add_host);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* mmc_remove_host - remove host hardware
|
|
|
|
|
* @host: mmc host
|
|
|
|
|
*
|
|
|
|
|
* Unregister and remove all cards associated with this host,
|
2007-07-12 01:22:11 +07:00
|
|
|
* and power down the MMC bus. No new requests will be issued
|
|
|
|
|
* after this function has returned.
|
2007-05-19 19:06:24 +07:00
|
|
|
*/
|
|
|
|
|
void mmc_remove_host(struct mmc_host *host)
|
|
|
|
|
{
|
2015-11-05 22:11:12 +07:00
|
|
|
mmc_unregister_pm_notifier(host);
|
2007-05-19 19:06:24 +07:00
|
|
|
mmc_stop_host(host);
|
|
|
|
|
|
2008-07-24 19:18:57 +07:00
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
mmc_remove_host_debugfs(host);
|
|
|
|
|
#endif
|
|
|
|
|
|
2007-05-19 19:06:24 +07:00
|
|
|
device_del(&host->class_dev);
|
|
|
|
|
|
2007-10-13 03:48:46 +07:00
|
|
|
led_trigger_unregister_simple(host->led);
|
2007-05-19 19:06:24 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(mmc_remove_host);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* mmc_free_host - free the host structure
|
|
|
|
|
* @host: mmc host
|
|
|
|
|
*
|
|
|
|
|
* Free the host once all references to it have been dropped.
|
|
|
|
|
*/
|
|
|
|
|
void mmc_free_host(struct mmc_host *host)
|
|
|
|
|
{
|
2014-11-28 20:38:36 +07:00
|
|
|
mmc_pwrseq_free(host);
|
2007-05-19 19:06:24 +07:00
|
|
|
put_device(&host->class_dev);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(mmc_free_host);
|