kernel.git/drivers/mmc/core/mmc.c, branch linux-3.2.y

mmc: mmc: Fix partition switch timeout for some eMMCs

2016-08-22T21:37:10Z

commit 1c447116d017a98c90f8f71c8c5a611e0aa42178 upstream. Some eMMCs set the partition switch timeout too low. Now typically eMMCs are considered a critical component (e.g. because they store the root file system) and consequently are expected to be reliable. Thus we can neglect the use case where eMMCs can't switch reliably and we might want a lower timeout to facilitate speedy recovery. Although we could employ a quirk for the cards that are affected (if we could identify them all), as described above, there is little benefit to having a low timeout, so instead simply set a minimum timeout. The minimum is set to 300ms somewhat arbitrarily - the examples that have been seen had a timeout of 10ms but were sometimes taking 60-70ms. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson Signed-off-by: Ben Hutchings

mmc: core: Fix bit width test failing on old eMMC cards

2013-05-30T13:34:49Z

commit 836dc2fe89c968c10cada87e0dfae6626f8f9da3 upstream. PARTITION_SUPPORT needs to be set before doing the compare on version number so the bit width test does not get invalid data. Before this patch, a Sandisk iNAND eMMC card would detect 1-bit width although the hardware supports 4-bit. Only affects old emmc devices - pre 4.4 devices. Reported-by: Elad Yi Signed-off-by: Philip Rakity Signed-off-by: Chris Ball Signed-off-by: Ben Hutchings

mmc: core: Fix voltage select in DDR mode

2012-01-26T00:13:27Z

commit 913047e9e5787a90696533a9f109552b7694ecc9 upstream. This patch fixes the wrong comparison before setting the interface voltage in DDR mode. The assignment to the variable ddr before comaprison is either ddr = MMC_1_2V_DDR_MODE; or ddr == MMC_1_8V_DDR_MODE. But the comparison is done with the extended csd value if ddr == EXT_CSD_CARD_TYPE_DDR_1_2V. Signed-off-by: Girish K S Acked-by: Subhash Jadavani Acked-by: Philip Rakity Signed-off-by: Chris Ball Signed-off-by: Greg Kroah-Hartman

mmc: core: Fix power_off_notify during suspend

2011-12-10T21:18:36Z

The eMMC 4.5 devices respond to only RESET and AWAKE command in the sleep state. Hence the mmc switch command to notify power off state should be sent before the device enters sleep state. This patch fixes the same. Signed-off-by: Girish K S Signed-off-by: Chris Ball

mmc: core: Fix setting power notify state variable for non-eMMC

2011-12-10T21:18:36Z

This patch skips the setting of the power notify state variable for non eMMC 4.5 devices. Also fixes the problem of omap_hsmmc noisy/broken for suspend resume reported by Kevin Hilman. Signed-off-by: Girish K S Acked-by: Ulf Hansson Signed-off-by: Chris Ball

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

2011-10-31T23:32:07Z

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: core: Cleanup eMMC4.5 conditionals

2011-10-27T13:11:33Z

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: support HPI send command

2011-10-26T20:32:29Z

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

2011-10-26T20:32:28Z

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

2011-10-26T20:32:28Z

This patch will apply the generic CMD6 timeout to switch command for power class. Signed-off-by: Seungwon Jeon Signed-off-by: Chris Ball