u-boot.git/drivers/mmc/mmc_write.c, branch v2016.01

mmc: update MMC_ERASE argument to match Linux kernel.

2016-01-04T16:17:43+00:00

Table 41 of the JEDEC standard for eMMC says that bit 31 of
the command argument is obsolete when issuing the ERASE
command (CMD38) on page 115 of this document:
	http://www.jedec.org/sites/default/files/docs/jesd84-B45.pdf

The SD Card Association Physical Layer Simplified Specification also
makes no mention of the use of bit 31.
	https://www.sdcard.org/downloads/pls/part1_410.pdf

The Linux kernel distinguishes between secure (bit 31 set) and
non-secure erase, and this patch copies the macro names from
include/linux/mmc/core.h.

Tested-by: Fabio Estevam 
Signed-off-by: Eric Nelson 
Tested-by: Hector Palacios

mmc_write.c: Make mmc_berase do 32bit safe 64bit math

2015-06-18T20:11:41+00:00

We want to see if the requested start or total block count are
unaligned.  We discard the whole numbers and only care about the
remainder.  Update the code to use div_u64_rem here and add a comment.

Cc: Hans de Goede 
Cc: Pantelis Antoniou 
Cc: Bernhard Nortmann 
Reported-by: Simon Glass 
Signed-off-by: Tom Rini 
Tested-by: Bernhard Nortmann 
Reviewed-by: Hans de Goede

mmc: Split mmc struct, rework mmc initialization (v2)

2014-03-24T10:58:56+00:00

The way that struct mmc was implemented was a bit of a mess;
configuration and internal state all jumbled up in a single structure.

On top of that the way initialization is done with mmc_register leads
to a lot of duplicated code in drivers.

Typically the initialization got something like this in every driver.

	struct mmc *mmc = malloc(sizeof(struct mmc));
	memset(mmc, 0, sizeof(struct mmc);
	/* fill in fields of mmc struct */
	/* store private data pointer */
	mmc_register(mmc);

By using the new mmc_create call one just passes an mmc config struct
and an optional private data pointer like this:

	struct mmc = mmc_create(&cfg, priv);

All in tree drivers have been updated to the new form, and expect
mmc_register to go away before long.

Changes since v1:

* Use calloc instead of manually calling memset.
* Mark mmc_register as deprecated.

Signed-off-by: Pantelis Antoniou

mmc: don't support write & erase for SPL builds

2013-09-20T15:58:55+00:00

For SPL builds this is just dead code since we'll only need to read.
Eliminating it results in a significant size reduction for the SPL
binary, which may be critical for certain platforms where the binary
size is highly constrained.

Signed-off-by: Paul Burton 
Acked-by: Pantelis Antoniou