Commit Graph

91 Commits

Author SHA1 Message Date
Wolfram Sang
14d5828f4e mmc: tmio: disable clock before changing it
Rcar2 & 3 docs state that for going to and coming from the 0xff setting,
the clock must first be disabled before the DIV bits are changed.
Instead of tracking this, let's just do this unconditionally.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2016-02-29 11:03:06 +01:00
Wolfram Sang
bf96208f05 mmc: tmio: refactor set_clock a little
Some of the indentation made the code awful to read. Fix that. Also,
introduce defines instead of magic hex values. Note that this includes
one change: We mask out know 0xff instead of 0x1ff. But 0x100 has always
been the clock enable bit. It doesn't make any sense to set it depending
on the clock calculation. Update copyright notices, too. I'll be working
on those files some more in the future.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2016-02-29 11:03:06 +01:00
Wolfram Sang
6d2bcbe5d1 mmc: tmio: remove stale comments
These don't make sense anymore. Since commit 5d60e50054 ("mmc: tmio:
add new TMIO_MMC_HAVE_HIGH_REG flags"), we don't deal with a resource
here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2016-02-29 11:03:05 +01:00
Wolfram Sang
04e24b80a3 mmc: tmio: add flag to reduce delay after changing clock status
The docs for RCar Gen2 & 3 I have access to, mention delays of 5ms after
stop and 1ms after start. Make it possible to apply these values.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2016-02-29 11:03:04 +01:00
Takeshi Kihara
0df9d2eae5 mmc: tmio: Fix timeout value for command request
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>
2015-08-24 11:25:53 +02:00
Ian Molton
7df56bbb0e mmc: TMIO: Fix I/O mapping leak on error using devm_ioremap()
Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
[bwh: Forward-ported to 4.0]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-06-01 09:06:47 +02:00
Geert Uytterhoeven
13a6a2ed1f mmc: tmio: Remove bogus un-initialization in tmio_mmc_host_free()
If CONFIG_DEBUG_SLAB=y:

    sh_mobile_sdhi ee100000.sd: Got CD GPIO
    sh_mobile_sdhi ee100000.sd: Got WP GPIO
    platform ee100000.sd: Driver sh_mobile_sdhi requests probe deferral
    ...
    Slab corruption (Not tainted): kmalloc-1024 start=ed8b3c00, len=1024
    2d0: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  ....kkkkkkkkkkkk
    Prev obj: start=ed8b3800, len=1024
    000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
    010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk

Struct tmio_mmc_host is embedded inside struct mmc_host, and thus is
freed by the call to mmc_free_host(). Hence it must not be written to
afterwards, as that will corrupt freed (and perhaps already reused)
memory.

Fixes: 94b110aff8 ("mmc: tmio: add tmio_mmc_host_alloc/free()")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-03-23 14:13:38 +01:00
Kuninori Morimoto
85c02ddd59 mmc: tmio: tmio_mmc_host has .multi_io_quirk
Current .multi_io_quirk is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 10:22:40 +01:00
Kuninori Morimoto
00452c11ea mmc: tmio: tmio_mmc_host has .clk_disable
Current .clk_disable is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 10:22:31 +01:00
Kuninori Morimoto
4fe2ec57a1 mmc: tmio: tmio_mmc_host has .clk_enable
Current .clk_enable is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 10:22:22 +01:00
Kuninori Morimoto
dfe9a229e0 mmc: tmio: tmio_mmc_host has .write16_hook
Current .write16_hook is implemented under tmio_mmc_data.
It goes to tmio_mmc_host by this patch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 10:22:17 +01:00
Kuninori Morimoto
94b110aff8 mmc: tmio: add tmio_mmc_host_alloc/free()
Current tmio_mmc driver is using tmio_mmc_data for driver/platform
specific data/callback, and it is needed for tmio_mmc_host_probe()
function. Because of this style, include/linux/mfd/tmio.h header has
tmio driver/framework specific data which is not needed from platform.

This patch adds new tmio_mmc_host_alloc/free() as cleanup preparation.
tmio driver specific data/callback will be implemented in tmio_mmc_host,
and platform specific data/callback will be implemented in tmio_mmc_data
in this cleanup.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 10:19:50 +01:00
Stephen Warren
d4d1144908 mmc: don't request CD IRQ until mmc_start_host()
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>
2014-09-23 09:01:36 +02:00
Sergei Shtylyov
bb98d9d1d2 mmc: tmio: prevent endless loop in tmio_mmc_set_clock()
I spent a couple of days with the driver just hanging due to me forgetting to
specify the external crystal frequency,  so that clk_get_rate() returned 0 and
thus the loop in tmio_mmc_set_clock() never ended. I don't think that's an
acceptable behavior, so I suggest that the minimum frequency is checked for 0
in tmio_mmc_host_probe().

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Ian Molton <ian.molton@codethink.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-19 20:43:09 +02:00
Kuninori Morimoto
b9bd7ff806 mmc: tmio: enable odd number size access
Current tmio is using sd_ctrl_read16/write16_rep()
for data transfer.
It works if transfer size was even number,
but, last 1 byte will be ignored if
transfer size was odd number.
This patch adds new tmio_mmc_transfer_data()
and solve this issue.

Tested-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-19 20:36:15 +02:00
Kuninori Morimoto
bbf0208d39 mmc: use .multi_io_quirk on tmio_mmc
Now, tmio_mmc can use .multi_io_quirk callback
instead of MMC_CAP2_NO_MULTI_READ flags.
let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 14:15:07 +02:00
Shinobu Uehara
da29fe2bf5 mmc: tmio: add actual clock support as option
Some controller is supporting actual clock on SD_CLK_CTRL :: DIV[7:0].
Renesas SH-Mobile SDHI doesn't support,
but, Renesas R-Car SDHI supports it.
This patch adds new TMIO_MMC_CLK_ACTUAL flag for it.

[Kuninori Morimoto: tidyuped for upstreaming]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:16 +02:00
Kuninori Morimoto
b30d6958a0 mmc: tmio: remove SCLKEN bit setting from tmio_mmc_set_clock()
TMIO clock is set via tmio_mmc_set_clock() -> tmio_mmc_clk_start(),
and SCLKEN bit will be set on tmio_mmc_clk_start().
It is not needed on tmio_mmc_set_clock() function.
The required clock setting will not be able to set
in some clocks without this patch.

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:15 +02:00
Shinobu Uehara
81e888daab mmc: tmio: check ILL_FUNC instead of CBSY
Some controllers need to check SD bus status when writing data.
Then, it checks ILL_FUNC bit on SD_INFO2 register,
and this method is controlled via TMIO_MMC_HAS_IDLE_WAIT flags.
Same method is required on tmio_mmc_data_irq() which will
be called after writing data.

Current driver is checking CBSY bit for this purpose,
but, some controllers doesn't have CBSY bit.
This patch checks ILL_FUNC bit instead of CBSY bit
if it has TMIO_MMC_HAS_IDLE_WAIT flags

[Kuninori Morimoto: tidyuped for upstreaming]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:15 +02:00
Shinobu Uehara
6b98757e53 mmc: tmio: add TMIO_MMC_SDIO_STATUS_QUIRK
Renesas R-Car SDHI should set reserved bits
on CTL_SDIO_STATUS register when writing.
This patch adds new TMIO_MMC_SDIO_STATUS_QUIRK flags
for this purpose

[Kuninori Morimoto: tidyuped for upstreaming
                    enabled this flags for all SH-Mobile/R-Car]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:14 +02:00
Shinobu Uehara
b8d11962c2 mmc: tmio: control multiple block transfer mode
Renesas SDHI has "Multiple Block Transfer Mode" settings
on SD_CMD register which controls CMD12 automatically.

This patch cares it, because
CMD12 is not needed when CMD53 (= SD_IO_RW_EXTENDED)

[Kuninori Morimoto: tidyuped for upstreaming
                    enabled this flags for all SH-Mobile/R-Car]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:14 +02:00
Shinobu Uehara
f83bfa751b mmc: tmio: clear error IRQ status
Next card access will be always
error if it didn't clear error status

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:13 +02:00
Ulf Hansson
341eb6a4e7 mmc: tmio: Remove library functions for system PM
These library functions aren't used and nor needed, let's remove them.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:12 +02:00
Ulf Hansson
9ade7dbf20 mmc: tmio: Make runtime PM callbacks available for CONFIG_PM
To give the option for tmio hosts to use the runtime PM callbacks for
CONFIG_PM_SLEEP as well as CONFIG_PM_RUNTIME, move them to CONFIG_PM.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:10 +02:00
Ulf Hansson
20e955c3c7 mmc: tmio: Mask all IRQs when inactive
To make sure we don't receive any spurious IRQs while we are inactive,
mask the IRQs from within the ->runtime_suspend() callback.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:10 +02:00
Ulf Hansson
ae12d25053 mmc: tmio: Handle clock gating from runtime PM functions
Add clock gating control as a part of the tmio library functions for
runtime PM.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:10 +02:00
Ulf Hansson
3b292bb0e9 mmc: tmio: Restructure ->set_ios() and adapt ->probe() to it
An internal power state machine were beeing used to keep ->probe() and
->set_ios() in sync. Especially for handling specific scenarios while
using CONFIG_MMC_CLKGATE. Moreover dependency to CONFIG_MMC_CLKGATE
existed to handle runtime PM properly, which we moves away from here.

By removing the state machine and instead make ->set_ios() rely on the
information provided through the function's in-parameters, the code
becomes significantly simplier.

Additonally as a part of this rework we prepares for making the runtime
PM callbacks responsible of clock gating.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:09 +02:00
Ulf Hansson
9ae4ed7d30 mmc: tmio: Extract bus_width modifications to a separate function
Move code for bus_width modification, out of the ->set_ios() callback
and into a separate function, to simplify code.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:09 +02:00
Ulf Hansson
0369483efc mmc: tmio: Keep host active while serving requests
Use runtime PM to keep the host active during I/O operations and other
requests which requires the tmio hardware to be powered.

Additionally make use of the runtime PM autosuspend feature with a
default timeout of 50 ms.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:08 +02:00
Ulf Hansson
7501c4315f mmc: tmio: Keep host active while SDIO IRQ is enabled
The host must be kept active to be able to serve SDIO IRQs, thus let's
prevent it from going inactive while SDIO IRQ is enabled.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2014-09-09 13:59:08 +02:00
Ulf Hansson
710dec95d5 mmc: tmio: Adapt to proper PM configs for exported functions
Since the users of the exported PM functions are now using the modern
PM ops macros, we can convert to the proper corresponding PM configs.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <chris@printf.net>
2014-02-13 22:58:09 -05:00
Kuninori Morimoto
5d60e50054 mmc: tmio: add new TMIO_MMC_HAVE_HIGH_REG flags
The accessibility checking method to the higher register was added by
69d1fe18e9 (mmc: tmio: only access registers above 0xff, if available)
But, it doesn't care 32bit register.  It is impossible to calculate it
from the resource size, since there is 16/32 bit register IP (e.g. VERSION
is located on 0xe2 if 16bit register, but it is located on 0x1c4 if 32bit
register).

This patch adds new TMIO_MMC_HAVE_HIGH_REG flags, tmio_mmc driver has it,
and sh_mobile_sdhi doesn't have it today.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2014-01-13 12:48:24 -05:00
Kuninori Morimoto
3b159a6e95 mmc: tmio: bus_shift become tmio_mmc_data member
.bus_shift is used to 16/32bit register access offset calculation on
tmio driver.  tmio_mmc_xxx is used from Toshiba/Renesas now, but this
bus_shift value depends on HW IP.  This patch moves .bus_shift to
tmio_mmc_data member and sets it on each driver.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2014-01-13 12:48:23 -05:00
Kuninori Morimoto
05fae4a755 mmc: tmio: use -EPROBE_DEFER if driver can't find regulator
Current tmio driver tries to use default ocr_avail if 1) it couldn't
find regulator and 2) if platform data doesn't have ocr_mask.
But, there is no guarantee that regulator driver probe is faster than
TMIO driver probe.  TMIO driver will not use regulator in such case.

By this patch, TMIO driver returns -EPROBE_DEFER if it couldn't find
regulator and if platform doesn't have ocr_mask.  Because, there is a
possibility that regulator has not been probed, but the user expects it.

This patch changes tmio_mmc_host_probe() behavior, but there is no user
who has conflict.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2014-01-13 12:48:22 -05:00
Kuninori Morimoto
dd006b3081 mmc: tmio: don't overwrite caps2
02cb3221d5 ("mmc: tmio: support caps2 flags") added caps2 support on
tmio, but it overwrites mmc_of_parse() settings.  This patch fixes it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent <laurent.pinchart@ideasonboard.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2014-01-13 12:48:11 -05:00
Ulf Hansson
d62c9577f9 mmc: tmio: Move away from using deprecated APIs
Suspend and resume of cards are being handled from the protocol layer
and consequently the mmc_suspend|resume_host APIs are deprecated.

This means we can simplify the suspend|resume callbacks by removing the
use of the deprecated APIs.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-10-30 20:28:35 -04:00
Chris Ball
9d731e7539 Revert "mmc: tmio-mmc: Remove .set_pwr() callback from platform data"
This reverts commit 3af9d15c71, which
causes a build failure:

drivers/mfd/asic3.c:724:2: error: unknown field 'set_pwr' specified in initializer
2013-09-06 07:29:05 -04:00
Laurent Pinchart
3af9d15c71 mmc: tmio-mmc: Remove .set_pwr() callback from platform data
The .set_pwr() callback isn't used anymore as all platforms register
GPIO-controlled regulators. Remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-08-24 23:58:13 -04:00
Laurent Pinchart
2b63b341d4 mmc: tmio-mmc: Remove .get_cd() callback from platform data
All platforms pass the CD GPIO number to the driver in the .cd_gpio
field. The .get_cd() callback isn't used anymore, remove it

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-08-24 23:58:12 -04:00
Laurent Pinchart
214fc309d1 mmc: slot-gpio: Add debouncing capability to mmc_gpio_request_cd()
Add a debounce parameter to the mmc_gpio_request_cd() function that
enables GPIO debouncing when set to a non-zero value. This can be used
by MMC host drivers to enable debouncing on the card detect signal.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-08-24 23:45:09 -04:00
Guennadi Liakhovetski
6d1d6b4759 mmc: tmio: fix compiler warning
This patch fixes a compiler warning:

drivers/mmc/host/tmio_mmc_pio.c: In function 'tmio_mmc_power_on':
drivers/mmc/host/tmio_mmc_pio.c:798:19: warning: ignoring return value of
'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-07-23 15:06:47 -04:00
Simon Baatz
274a752b1a mmc: tmio-mmc: handle mmc_of_parse() errors during probe
Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-06-27 10:22:57 -04:00
Guennadi Liakhovetski
b9ec274412 mmc: tmio: reset the controller after power-up
This fixes two reported problems:
1. after a system resume the controller isn't functioning until a command
   runs on a timeout and a controller reset is performed.
2. if a card is ejected during a running write operation, its re-insertion
   isn't detected.

Reported-by: Nguyen Viet Dung <nv-dung@jinso.co.jp>
Reported-by: Nguyen Hong Ky <nh-ky@jinso.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Tested-by: Nguyen Viet Dung <nv-dung@jinso.co.jp>
Tested-by: Nguyen Hong Ky <nh-ky@jinso.co.jp>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-06-06 11:48:14 -04:00
Guennadi Liakhovetski
e83b7a8acc mmc: tmio: fix unbalanced power-on calls with clock-gating enabled
With MMC clock gating enabled the MMC core currently calls MMC host driver's
.set_ios() method with .power_mode == MMC_POWER_ON and the clock value set
either to 0 or to the target rate. The tmio MMC driver then wrongly
translates the latter calls to card slot power-on requests, even when the
slot already was on. This patch fixes the driver to avoid needlessly
incrementing power-supplying regulator's use count.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-06-06 11:48:04 -04:00
Guennadi Liakhovetski
b22ffdcd25 mmc: tmio: postpone controller reset during resume
When resuming, the tmio_mmc_host_resume() function is run when the
controller might still be powered down. Issuing a reset command to it at
that time has no effect. This patch postpones resetting the controller
until the first powering-up .set_ios() call.

Reported-by: Nguyen Viet Dung <nv-dung@jinso.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-06-06 07:37:48 -04:00
Guennadi Liakhovetski
619b08d45a mmc: tmio: add support for the VccQ regulator
Some SD/MMC interfaces use 2 power regulators: one to power the card itself
(Vcc) and another one to pull signal lines up (VccQ). In case of eMMC and
UHS SD cards the regulators also have to be configured to supply different
voltages. The preferred order of turning supply power on and off is to
turn Vcc first on and last off.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24 14:37:24 -05:00
Guennadi Liakhovetski
5a00a971a2 mmc: tmio-mmc: parse device-tree bindings
Add parsing of common and driver-specific DT bindings to the tmio-mmc
MMC host driver and the sh_mobile_sdhi interface layer.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24 14:37:22 -05:00
Guennadi Liakhovetski
7b952137fd mmc: sdhi, tmio: only check flags in tmio-mmc driver proper
tmio-mmc platform flags can be set by various means, including caller
drivers and device-tree bindings, therefore it is better to only check
them in the tmio-mmc driver proper, not in caller drivers themselves.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-24 14:37:18 -05:00
Shawn Guo
164cda5236 mmc: remove unncessary mmc_gpio_free_cd() call from slot-gpio users
Since slot-gpio uses devm_* managed functions in mmc_gpio_request_cd()
now, we can remove those mmc_gpio_free_cd() call from host drivers'
.probe() error path and .remove().

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-11 12:51:23 -05:00
Bill Pemberton
c3be1efd41 mmc: remove use of __devinit
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Chris Ball <cjb@laptop.org>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Venkatraman S <svenkatr@ti.com>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: Bruce Chang <brucechang@via.com.tw>
Cc: Harald Welte <HaraldWelte@viatech.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 12:28:18 -08:00