From: Abbas Raza
According to JEDEC Standard No. 84-A441:
The card lock/unlock command (CMD42) can only be performed when the
card operates in single data rate mode. CMD42 is an illegal command in
dual data rate mode.
So if the card is in DDR mode, don't perform lock/unlock commands.
Othe
From: Abbas Raza
According to SD Physical Layer Specifications:
Locked cards respond to (and execute) all commands in the "basic"
command class (class 0), ACMD41, CMD16 and "lock card" command class.
Thus, the host is allowed to reset, initialize, select, query for stat
From: Abbas Raza
Idea behind this patch is to skip all the regular block io operations
for RPMB partitions because these are not regular partitions and require
a different command sequence for reading and writing. RPMB partitions
should only be accessed via ioctl. Without this patch we see
From: Abbas Raza
In case an ioctl changes an EXT_CSD register, update the internal ext_csd
data structure, too. Else the driver's internal ext_csd data structure and
the EXT_CSD register content doesn't match any more. In this case additional
ioctls changing the ext_csd would revert t
d in JEDEC
Standard No. 84-A441, is required to access it, then why mmc initialisation
code is using the wrong command sequence(CMD6-->CMD23-->CMD18) to access it?
Thanks .
Abbas Raza
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in JEDEC
Standard No. 84-A441, is required to access it, then why mmc initialisation
code is using the wrong command sequence(CMD6-->CMD23-->CMD18) to access it?
Thanks .
Abbas Raza
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