linux.git/include/linux/mmc/mmc.h, branch v3.8

mmc: core: Expose access to RPMB partition

2012-12-06T18:54:46+00:00

Following JEDEC standard, if the mmc supports RPMB partition,
a new interface is created and exposed via /dev/block.
Users will be able to access RPMB partition using standard
mmc IOCTL commands.

Signed-off-by: Alex Macro 
Signed-off-by: Loic Pallardy 
Reviewed-by: Namjae Jeon 
Acked-by: Linus Walleij 
Acked-by: Johan Rudholm 
Acked-by: Krishna Konda 
Signed-off-by: Chris Ball

mmc: support BKOPS feature for eMMC

2012-10-03T14:05:12+00:00

Enable eMMC background operations (BKOPS) feature.

If URGENT_BKOPS is set after a response, note that BKOPS are required.
Immediately run BKOPS if required.  Read/write operations should be
requested during BKOPS(LEVEL-1), then issue HPI to interrupt the
ongoing BKOPS and service the foreground operation.
(This patch only controls the LEVEL2/3.)

When repeating the writing 1GB data, at a certain time, performance is
decreased.  At that time, card triggers the Level-3 or Level-2.  After
running bkops, performance is recovered.

Future considerations:
 * Check BKOPS_LEVEL=1 and start BKOPS in a preventive manner.
 * Interrupt ongoing BKOPS before powering off the card.
 * How do we get BKOPS_STATUS value (periodically send ext_csd command)?
 * If using periodic bkops, also consider runtime_pm control.

Signed-off-by: Jaehoon Chung 
Signed-off-by: Kyungmin Park 
Signed-off-by: Konstantin Dorfman 
Reviewed-by: Maya Erez 
Signed-off-by: Chris Ball

mmc: core: fix the decision of HS200/DDR card-type

2012-05-09T14:03:21+00:00

Current implementation decides the card type exclusively. Even though
eMMC device can support both HS200 and DDR mode, card type will be
set only for HS200. If the host doesn't support HS200 but has DDR
capability, then DDR mode can't be selected.

Signed-off-by: Seungwon Jeon 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Chris Ball

mmc: MMC-4.5 Data Tag Support

2012-03-25T23:33:44+00:00

MMC-4.5 data tag feature will be used to store the file system meta-data
in the tagged region of eMMC. This will improve the write and subsequent
read transfer time for the meta data.

Signed-off-by: Saugata Das 
Tested-by: Venkatraman S 
Signed-off-by: Chris Ball

mmc: core: HS200 mode support for eMMC 4.5

2012-01-12T20:17:15+00:00

This patch adds the support of the HS200 bus speed for eMMC 4.5 devices.
The eMMC 4.5 devices have support for 200MHz bus speed. The function
prototype of the tuning function is modified to handle the tuning
command number which is different in sd and mmc case.

Signed-off-by: Girish K S 
Signed-off-by: Philip Rakity 
Signed-off-by: Chris Ball

mmc: boot partition ro lock support

2012-01-12T04:58:43+00:00

Enable boot partitions to be read-only locked until next power on via
a sysfs entry. There will be one sysfs entry for each boot partition:

/sys/block/mmcblkXbootY/ro_lock_until_next_power_on

Each boot partition is locked by writing 1 to its file.

Signed-off-by: Johan Rudholm 
Signed-off-by: John Beckett 
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: mmc sanitize feature support for v4.5

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

In the v4.5, there's no secure erase & trim support.
Instead it supports the sanitize feature.

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

mmc: core: Add Power Off Notify Feature eMMC 4.5

2011-10-26T20:32:23+00:00

This patch adds support for the power off notify feature, available in
eMMC 4.5 devices. If the host has support for this feature, then the
mmc core will notify the device by setting the POWER_OFF_NOTIFICATION
byte in the extended csd register with a value of 1 (POWER_ON).

For suspend mode short timeout is used, whereas for the normal poweroff
long timeout is used.

Signed-off-by: Girish K S 
Signed-off-by: Jaehoon Chung 
Signed-off-by: Chris Ball