[RFC 0/6] mmc: Field Firmware Update

[Holger Schurig <holgerschurig@gmail.com>]

There have been some attempts to add FFU (field firmware update).  The last
AFAIK in Nov 2014, http://www.spinics.net/lists/linux-mmc/msg29324.html

But it seems that the committers weren't persistent enought.

I took the liberty to take Avi's patch and make it hopefully
maintainer-review friendly.

The first 5 patches just move functions out of mmc_test.c into core.c. Those
functions will later be used by both mmc_test.c and mmc_ffu.c.  Contrary to
Avi's patch I didn't add static helper functions to mmc_test.c, e.g. 
there's no mmc_test_prepare_mrq() that calls mmc_prepare_mrq().  It's
simpler to call mmc_prepare_mrq() directly.  It's just one more dereference
from *mmc_card to *mmc_test_card anyway.

The patch [6/6] is http://www.spinics.net/lists/linux-mmc/msg29326.html, but
with less checkpatch warnings.  And it doesn't use mmc_send_ext_csd()
anymore, which has been deleted since November.

I'm sending this patch as RFC now. It compiles (for me). But I get the
firmware update file from Kingston only next Tuesday.  That means that so
far I haven't been testing it. It won't do anything without the proper
user-space command in mmc-utils anyway :-)

Comments welcome (I intent to get this patch into the kernel)

The patch is against Linux GIT (v4.3-11748-g46d862b).

Holger

 drivers/mmc/card/Kconfig    |  11 +
 drivers/mmc/card/Makefile   |   1 +
 drivers/mmc/card/block.c    |   5 +
 drivers/mmc/card/mmc_ffu.c  | 489 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/mmc/card/mmc_test.c | 235 +++++----------------
 drivers/mmc/core/core.c     | 134 ++++++++++++
 drivers/mmc/core/mmc_ops.c  |   4 +-
 include/linux/mmc/card.h    |   1 +
 include/linux/mmc/core.h    |  41 ++++
 include/linux/mmc/mmc.h     |   6 +
 10 files changed, 739 insertions(+), 188 deletions(-)
 create mode 100644 drivers/mmc/card/mmc_ffu.c

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2.1.4