Adding card detect callback function and card detect configuration
function for MMC1 Controller on OMAP4.

Card detect configuration function does initial configuration of the
MMC Control & PullUp-PullDown registers of Phoenix.

For MMC1 Controller, card detect interrupt source is
twl6030 which is non-gpio. The card detect call back function provides
card present/absent status by reading MMC Control register present
on twl6030.

Since OMAP4 doesn't use any GPIO line as used in OMAP3 for card detect,
the suspend/resume initialization which was done in omap_hsmmc_gpio_init
previously is moved to the probe thus making it generic for both OMAP3 &
OMAP4.

Cc: Tony Lindgren <tony@atomide.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Madhusudhan Chikkature <madhu.cr@ti.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: NKishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Adjust the tmio_mmc block size check to accept 2-byte requests in 4-bit
mode if the hardware supports it.

Tested with the SDHI hardware block included in sh7724.
Signed-off-by: NYusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Acked-by: NMagnus Damm <damm@opensource.se>
Tested-by: NArnd Hannemann <arnd@arndnet.de>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

In some platforms (e.g. AP4EVB) the card detect pin of a slot is not
directly connected to the sh_mmcif controller, so that polling needs
to be used. To overcome the overhead induced by querying the controller
on each poll cycle, card detection can be handled in the platform code
more efficiently.
This patch exposes a get_cd hook for that purpose.
Signed-off-by: NArnd Hannemann <arnd@arndnet.de>
Tested-by: NYusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Some controllers, supported by the tmio_mmc driver do not have the card
detect pin of a slot connected, so that polling needs to be used and
card detection is handled by other means.
This patch exposes a get_cd hook for that purpose.
Signed-off-by: NArnd Hannemann <arnd@arndnet.de>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This adds the support of atmel-mci sd/mmc driver in at91sam9g45 devices and
board files. This also configures the DMA controller slave interface for
at_hdmac dmaengine driver.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Support Marvell PXA168/PXA910/MMP2 SD Host Controller.
Signed-off-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Acked-by: NHaojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The SPI bus is not reliable for large data transfers on all platforms.
The current mmc_spi driver fails SD read/write commands immediately if
occasional CRC errors are reported by the SD device.  This patch makes
the operation recover from CRC errors by repeating the last SD command.
The retry count is set to 5 to ensure the driver passes stress tests.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

This driver adds basic support for the esdhc-core found on e.g.
imx35/51, as a platform driver.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Tested-by: NEric Bénard <eric@eukrea.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Put everything which can be shared between the OF and platform version
of this driver into a local .h file.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Tested-by: NEric Bénard <eric@eukrea.com>
[cjb: fix compile error: sdhci-esdhc.c->sdhci-esdhc.h]
Signed-off-by: NChris Ball <cjb@laptop.org>

The custom init call may need more data to perform its job, so we pass
it a pointer to pdata, too. Also, always use the platform_id specific
data even if platform_data is present. Doing that, platform_data can
additionally be parsed by init() for board-specific information (via
sdhci->mmc->parent).

(Note: the old behaviour was that you could override the platform_id
specific data with your own. However, one can still do this by using the
"sdhci" id instead of "sdhci-<something>".)
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Tested-by: NEric Bénard <eric@eukrea.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Some controllers handle their write-protection differently. Introduce a
callback to be able to handle it, ensuring the same locking takes place
for it. Rename the status variable to make it more obvious why the read
from the registers needs to be inverted.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Tested-by: NEric Bénard <eric@eukrea.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Make use of the include/linux/mmc directory.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Tested-by: NEric Bénard <eric@eukrea.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

We need to carry some information per host, e.g. the clock. Add a
structure for it and initialize it in the generic part. Also improve
the check for a parent.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Fix kconfig dependency warning to satisfy dependencies:

  warning: (MMC_CB710 && MMC && PCI) selects CB710_CORE which has
  unmet direct dependencies (MISC_DEVICES && PCI)
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Acked-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Clock divider selection in partially verified, so document known facts
in code.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NChris Ball <cjb@laptop.org>

Snippet of code for how adaptation layer should handle the call:
/*
 * eMMC spec calls for the host to send 74 clocks to the card
 * during initialization, right after voltage stabilization.
 * create the clocks manually right here.
 */
void generate_init_clocks_A0(struct sdhci_host *host, u8 power_mode)
{
	struct sdhci_mmc_slot *slot = sdhci_priv(host);

	if (slot->power_mode == MMC_POWER_UP &&
	    power_mode == MMC_POWER_ON) {
		/* controller specific code here */
		/* slot->power_mode holds previous power setting */
	}
	slot->power_mode = power_mode;
}
Signed-off-by: NPhilip Rakity <prakity@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

The SD and MMC code set highspeed using different constants.
Change the sd driver to recognize this and switch to high speed.
Validated code when testing eMMC dual data rate.
Signed-off-by: NPhilip Rakity <prakity@marvell.com>
[cjb: changelog + indentation fixes]
Signed-off-by: NChris Ball <cjb@laptop.org>

This adds the basic identifiers. Due to the various chip quirks it's not
enough to make MRST support very useful for earlier steppings but that can
follow.

(I'm currently trying to verify which steps actually matter outside Intel
 so I can avoid unneeded stuff going upstream)

[Extracted from original development]
Signed-off-by: NJiebingLi <jiebing.li@intel.com>
[Folds in fixes]
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Basic support for the Intel Medfield devices

Give them their own quirks as we will need to update this later.
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Currently we write it to the chip data, but if the probe handler overrides
it we ignore the new value and keep using our cached one. Fix this so that
a probe handler can adjust the slot count.
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Some platforms based on sdhci-pltfm need to set their own quirks.
Previously to this patch, the quirks were in drivers/mmc/host/sdhci.h.

This patch splits drivers/mmc/host/sdhci.h into two parts:

* drivers/mmc/host/sdhci.h  includes the HC registers and I/O accessors.
* include/linux/mmc/sdhci.h includes the sdhci structure and quirks.

Instead of including drivers/mmc/host/sdhci.h, -pltfm drivers should
now include include/linux/mmc/sdhci.h and include/linux/sdhci-pltfm.h.

This patch avoids adding/changing the calls/flags in the
sdhci_pltfm_data structure.  It has been tested on STM platforms
(e.g. STx7106, STx7108, STx5206) where the driver is configured
and used as shown in the example below:

[snip]
static int mmc_pad_resources(struct sdhci_host *sdhci)
{
	if (!devm_stm_pad_claim(sdhci->mmc->parent,
				&stx7108_mmc_pad_config,
				dev_name(sdhci->mmc->parent)))
		return -ENODEV;

	return 0;
}

static struct sdhci_pltfm_data stx7108_mmc_platform_data = {
	.init = mmc_pad_resources,
	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
};

static struct platform_device stx7108_mmc_device = {
	.name = "sdhci",
[snip]

Note: drivers/mmc/host/sdhci.h now also includes linux/mmc/sdhci.h,
and no modifications should be needed on other sdhci-<XXX> drivers.
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch fixes a warning when compiling the sdhci driver:
  pwr may be used uninitialized in sdhci_set_power

Tested with the following compiler versions: 4.2.4 and 4.4.4
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds the suspend and resume functions
in the sdhci-pltfm device driver.
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

After discovering a problem in regulator reference counting I took Mark
Brown's advice to move the reference count into the MMC core by making the
regulator status a member of struct mmc_host.

I took this opportunity to also implement NULL versions of
the regulator functions so as to rid the driver code from
some ugly #ifdef CONFIG_REGULATOR clauses.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Reviewed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sundar Iyer <sundar.iyer@stericsson.com>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Cliff Brake <cbrake@bec-systems.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

When a controller requires SDHCI_QUIRK_BROKEN_CARD_DETECTION, we poll
for card insertion/removal, and that creates interrupts.  There's no
need to be doing this if we have a non-removable card.

This patch requires cards to be removable before we're willing to set
MMC_CAP_NEEDS_POLL.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NMatt Fleming <matt@console-pimps.org>
Acked-by: NWolfram Sang <w.sang@pengutronix.de>
[cjb: modified changelog and code indentation]
Signed-off-by: NChris Ball <cjb@laptop.org>

The EXTRA_CFLAGS assignment in mmc/Makefile was not accomplishing
anything because this flag only has effect on sources at the same level
as the makefile (i.e., per directory). Since card/, core/, and host/
rely on MMC_DEBUG, the subdir-ccflags-y variant seems to be the
appropriate choice.
Signed-off-by: Nmatt mooney <mfm@muteddisk.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

In a multi-controller environment it is helpful to know which controller
has problems.
Signed-off-by: NPhilip Rakity <prakity@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch is necessary to gain the performance boost from 8-bit data
with the sdhci-stm driver.
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

MMC_CAP_MMC_HIGHSPEED allows MMC and eMMC to negotiate up to 50M
instead of the previous limit of 25M.
Signed-off-by: NZhangfei Gao <zgao6@marvell.com>
Acked-by: NMatt Fleming <matt@console-pimps.org>
Acked-by: NKyungmin Park <kmpark@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

While we're at it, add symbols for SDHCI_MAX_DIV_SPEC_{200,300}.
Signed-off-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

SDHC Spec 3.0: Capabilities Register bits[15-08] are Base Clock Frequency
      1.0/2.0: Capabilities Register bits[13-08] are Base Clock Frequency
Signed-off-by: NZhangfei Gao <zgao6@marvell.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Michal Miroslaw <mirqus@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NZhangfei Gao <zgao6@marvell.com>
Cc: Michał Mirosław <mirqus@gmail.com>
Cc: David Vrabel <david.vrabel@csr.com>
Reviewed-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

The "6882a8c0 sdhci: Add better ADMA error reporting" commit added
sdhci_show_adma_error() which is built when DEBUG is defined.  Since we
already have CONFIG_MMC_DEBUG used elsewhere in this driver, may as well
make consistent use of that config knob instead.
Signed-off-by: NGeorge G. Davis <gdavis@mvista.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add a driver for USB SD Host Controller devices.  These devices are
Cypress Astoria chips with firmware compliant with issue 2 of CSR's USHC
specification.

[cjb: adapt to block layer deprecation of max_{hw,phys}_segs]
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

We have deprecated the distinction between hardware and physical
segments in the block layer.  Consolidate the two limits into one in
drivers/mmc/.
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

[cjb: rebased patch against Linus]
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: <linux-mmc@vger.kernel.org>
Acked-by: NManuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Ball <cjb@laptop.org>