linux-toradex.git/drivers/mmc/core, branch v3.2-rc5

mmc: Fix implicit use of stat.h header in associated files

2011-10-31T23:32:07+00:00

Once the implicit use of module.h is prevented, these files will
fail to find the stat.h header content.

Fix up the implicit usage expectations in advance of the cleanup.

Signed-off-by: Paul Gortmaker

mmc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required

2011-10-31T23:32:06+00:00

These two basic defines were everywhere, simply because module.h
was also everywhere.   But we are cleaning up the latter.  So make
the exporters actually call out their need for the include.

Signed-off-by: Paul Gortmaker

mmc: core: Cleanup eMMC4.5 conditionals

2011-10-27T13:11:33+00:00

Code cleanup, putting all eMMC 4.5 detection cases together.
This patch removes one if-statement and assembles all. And it also
removes variable initialization below else-statement -- all members
of card structure are already set to zero at card-init.

Signed-off-by: Seungwon Jeon 
Signed-off-by: Chris Ball

mmc: core: Prevent too long response times for suspend

2011-10-26T20:32:31+00:00

While trying to suspend the mmc host there could still be
ongoing requests that we need to wait for. At the same time
a device driver must respond to a suspend request rather quickly.

Instead of potentially wait "forever" by claiming the host we now
"try" to claim the host instead. If it fails, -EBUSY is returned.

Signed-off-by: Ulf Hansson 
Reviewed-by: Sujit Reddy Thumma 
Acked-by: Linus Walleij 
Signed-off-by: Chris Ball

mmc: recognise SDIO cards with SDIO_CCCR_REV 3.00

2011-10-26T20:32:31+00:00

Table 6-2: CCCR bit Definitions, address 00h.  Part E1 SDIO Simplified
Specification Version 3.00, Feb. 25, 2011.

This patch has been tested with Marvell WLAN device SD8797.

Signed-off-by: Bing Zhao 
Signed-off-by: Chris Ball

mmc: sd: Handle SD3.0 cards not supporting UHS-I bus speed mode

2011-10-26T20:32:30+00:00

Here is Essential conditions to indicate Version 3.00 Card
(SD_SPEC=2 and SD_SPEC3=1) :
(1) The card shall support CMD6
(2) The card shall support CMD8
(3) The card shall support CMD42
(4) User area capacity shall be up to 2GB (SDSC) or 32GB (SDHC)
    User area capacity shall be more than or equal to 32GB and
    up to 2TB (SDXC)
(5) Speed Class shall be supported (SDHC or SDXC)

So even if SD card doesn't support any of the newly defined
UHS-I bus speed mode, it can advertise itself as SD3.0 cards
as long as it supports all the essential conditions of
SD3.0 cards. Given this, these type of cards should atleast
run in High Speed mode @50MHZ if it supports HS.

But current initialization sequence for SD3.0 cards is
such that these non-UHS-I SD3.0 cards runs in Default
Speed mode @25MHz.

This patch makes sure that these non-UHS-I SD3.0 cards run
in High Speed Mode @50MHz.

Tested this patch with SanDisk Extreme SDHC 8GB Class 10 card.

Reported-by: "Hiremath, Vaibhav" 
Signed-off-by: Subhash Jadavani 
Signed-off-by: Chris Ball

mmc: core: support HPI send command

2011-10-26T20:32:29+00:00

HPI command is defined in eMMC4.41.
This feature is important for eMMC4.5 devices.

Signed-off-by: Jaehoon Chung 
Signed-off-by: Chris Ball

mmc: core: Add cache control for eMMC4.5 device

2011-10-26T20:32:28+00:00

This patch adds cache feature of eMMC4.5 Spec.
If device supports cache capability, host can utilize some specific
operations.

Signed-off-by: Seungwon Jeon 
Signed-off-by: Jaehoon Chung 
Signed-off-by: Chris Ball

mmc: core: Modify the timeout value for writing power class

2011-10-26T20:32:28+00:00

This patch will apply the generic CMD6 timeout to switch command
for power class.

Signed-off-by: Seungwon Jeon 
Signed-off-by: Chris Ball

mmc: core: new discard feature support at eMMC v4.5

2011-10-26T20:32:27+00:00

MMC v4.5 supports the DISCARD feature (CMD38).  It's different from
trim and there's no check bit.  Currently it's only supported at v4.5.

Signed-off-by: Kyungmin Park 
Signed-off-by: Jaehoon Chung 
Signed-off-by: Chris Ball