kernel.git/drivers/mmc/core/mmc.c, branch linux-3.1.y

mmc: core: ext_csd.raw_* used in comparison but never set

2011-11-11T17:42:28Z

commit 5238acbe36dd5100fb6b035a995ae5fc89dd0708 upstream. f39b2dd9d ("mmc: core: Bus width testing needs to handle suspend/resume") added code to only compare read-only ext_csd fields in bus width testing code, yet it's comparing some fields that are never set. The affected fields are ext_csd.raw_erased_mem_count and ext_csd.raw_partition_support. Signed-off-by: Andrei Warkentin Acked-by: Philip Rakity Signed-off-by: Chris Ball Signed-off-by: Greg Kroah-Hartman

mmc: core: Fix hangs related to insert/remove of cards

2011-11-11T17:42:27Z

commit 7f7e4129c23f0419257184dff6fec89d2d5a8964 upstream. During a rescan operation mmc_attach(sd|mmc|sdio) functions are called. The error handling in these function can trigger a detach of the bus, which also meant a power off. This is not notified by the rescan operation which then continues to the next attach function. If a power off has been done, the framework must never send any new commands to the host driver, without first doing a new power up. This will most likely trigger any host driver to hang. Moving power off out of detach and instead handle power off separately when it is actually needed, solves the issue. Signed-off-by: Ulf Hansson Acked-by: Linus Walleij Signed-off-by: Chris Ball Signed-off-by: Greg Kroah-Hartman

mmc: core: Detect eMMC v4.5 ext_csd entries

2011-08-13T18:50:22Z

The eMMC v4.5 Spec is released now: EXT_CSD_REV Extended CSD Revision 255-7 Reserved 6 Revision 1.6 (for MMC v4.5) 5 Revision 1.5 (for MMV v4.41) ... Signed-off-by: Kyungmin Park Signed-off-by: Chris Ball

mmc: core: Bus width testing needs to handle suspend/resume

2011-07-13T18:54:37Z

On reading the ext_csd for the first time (in 1 bit mode), save the ext_csd information needed for bus width compare. On every pass we make re-reading the ext_csd, compare the data against the saved ext_csd data. This fixes a regression introduced in 3.0-rc1 by 08ee80cc397ac1a3 ("mmc: core: eMMC bus width may not work on all platforms"), which incorrectly assumed we would be re-reading the ext_csd at resume- time. Signed-off-by: Philip Rakity Tested-by: Jaehoon Chung Signed-off-by: Chris Ball

mmc: core: eMMC bus width may not work on all platforms

2011-05-25T20:52:32Z

CMD19 -- The offical way to validate bus widths from the JEDEC spec does not work on all platforms. Some platforms that use PCI/PCIe to connect their SD controllers are known to fail. If the quirk MMC_BUS_WIDTH_TEST is not defined we try to figure out the bus width by reading the ext_csd at different bus widths and compare this against the ext_csd read in 1 bit mode. If no ext_csd is available we default to 1 bit operations. Code has been tested on mmp2 against 8 bit eMMC and Transcend 2GB card that is known to not work in 4 bit mode. The physical pins on the card are not present to support 4 bit operation. Signed-off-by: Philip Rakity Signed-off-by: Chris Ball

mmc: core: add support for eMMC Dual Data Rate

2011-05-25T03:53:58Z

eMMC voltage change not required for 1.8V. 3.3V and 1.8V vcc are capable of doing DDR. vccq of 1.8v is not required. Signed-off-by: Philip Rakity Reviewed-by: Arindam Nath Signed-off-by: Chris Ball

mmc: MMC boot partitions support.

2011-05-25T01:01:21Z

Allows device MMC boot partitions to be accessed. MMC partitions are treated effectively as separate block devices on the same MMC card. Signed-off-by: Andrei Warkentin Acked-by: Arnd Bergmann Signed-off-by: Chris Ball

mmc: core: Allow setting CMD timeout for CMD6 (SWITCH).

2011-05-25T01:01:13Z

CMD6 is an R1B-type command, where DAT is used as busy. Depending on register written using CMD6, timeout value can be different as per spec. Signed-off-by: Andrei Warkentin Signed-off-by: Chris Ball

mmc: Reliable write support.

2011-05-25T00:59:38Z

Allows reliable writes to be used for MMC writes. Reliable writes are used to service write REQ_FUA/REQ_META requests. Handles both the legacy and the enhanced reliable write support in MMC cards. Signed-off-by: Andrei Warkentin Reviewed-by: Arnd Bergmann Signed-off-by: Chris Ball

mmc: Ensure linux starts in eMMC user partition

2011-05-25T00:59:13Z

uBoot sometimes leaves eMMC pointing to the private boot partition. Ensure we always start looking at the user partition. Signed-off-by: Philip Rakity Signed-off-by: Bruce Clemens Signed-off-by: Mark F. Brown Signed-off-by: Chris Ball