[RFC 0/6] mmc: Field Firmware Update

From: Holger Schurig
Date: Fri Nov 13 2015 - 09:56:28 EST

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).


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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