u-boot.git/common/cmd_mmc.c, branch v2014.04

mmc: Add 'mmc rst-function' sub-command

2014-04-02T10:02:58+00:00

Some eMMC chips may need the RST_n_FUNCTION bit set to a non-zero value
in order for warm reset of the system to work.  Details on this being
required will be part of the eMMC datasheet.  Also add using this
command to the dra7xx README.

* Whitespace fix by panto

Signed-off-by: Tom Rini 
Acked-by: Pantelis Antoniou

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

cmd_mmc.c: Drop open/close mmc sub-commands

2014-02-07T16:17:49+00:00

The open and close mmc sub-commands implement a hard-coded set of values
specific to the SMDK5250 platform.  Remove these commands as what they
did can be done instead with a series of mmc dev / bootpart / bootbus
commands instead now.

Cc: Amar 
Cc: Minkyu Kang 
Acked-by: Jaehoon Chung 
Signed-off-by: Tom Rini 
Signed-off-by: Pantelis Antoniou

cmd_mmc.c: Add bootbus mmc sub-command

2014-02-07T16:17:49+00:00

Add a bootbus sub-command to the mmc command to allow for setting
the boot_bus_width, reset_boot_bus_width and boot_mode fields of
BOOT_BUS_WIDTH (EXT_CSD[177]).

Acked-by: Jaehoon Chung 
Signed-off-by: Tom Rini 
Signed-off-by: Pantelis Antoniou

cmd_mmc.c: Add 'partconf' command to mmc

2014-02-07T16:17:49+00:00

Add a partconf sub-command to the mmc command to allow for setting
the boot_ack, boot_partition and partition_access fields of
PARTITION_CONFIG (formerly BOOT_CONFIG, EXT_CSD[179]).  Part of this
requires changing the check for 'part' from an strncmp to a strcmp, like
the rest of the sub-commands.

Cc: Andy Fleming 
Cc: Pantelis Antoniou 
Acked-by: Jaehoon Chung 
Signed-off-by: Tom Rini 
Signed-off-by: Pantelis Antoniou

cmd_mmc.c: Rename 'bootpart' to 'bootpart-resize'

2014-02-07T16:17:49+00:00

Rename 'bootpart' to 'bootpart-resize' to better reflect what this
command is for.

Acked-by: Jaehoon Chung 
Signed-off-by: Tom Rini 
Signed-off-by: Pantelis Antoniou

cmd_mmc.c: Change 'bootpart' code to match normal coding style

2014-02-07T16:17:48+00:00

Acked-by: Jaehoon Chung 
Signed-off-by: Tom Rini 
Signed-off-by: Pantelis Antoniou

mmc: add setdsr support

2014-01-09T09:47:51+00:00

The eMMC and the SD-Card specifications describe the optional SET_DSR command.
During measurements at our lab we found that some cards implementing this feature
having really strong driver strengts per default. This can lead to voltage peaks
above the specification of the host on signal edges for data sent from a card to
the host.

Since availability of a given card type may be shorter than the time a certain
hardware will be produced it is useful to have support for this command (Alternative
would be changing termination resistors and adapting the driver strength of the
host to the used card.)

Following proposal for an implementation:

- new field that reflects CSD field DSR_IMP in struct mmc
- new field for design specific DSR value in struct mmc
- board code can set DSR value in mmc struct just after registering an controller
- mmc_startup sends the the stored DSR value before selecting a card, if DSR_IMP is set

Additionally the mmc command is extended to make is possible to play around with different
DSR values.

The concept was tested on a i.MX53 based platform using a Micron eMMC card where the default
DSR is 0x0400 (12mA) but in our design 0x0100 (0x0100) were enough. To use this feature for
instance on a mx53loco one have to add a call to mmc_set_dsr() in board_mmc_init() after
calling fsl_esdhc_initialize() for the eMMC.

Signed-off-by: Markus Niebel 
Acked-by: Pantelis Antoniou

Fix some obvious typos across multiple subsystems.

2013-09-20T14:29:48+00:00

Typoes fixed:

  "partion" -> "partition"
  "retrive", "retreive" -> "retrieve"
  "th" -> "to"

Signed-off-by: Robert P. J. Day

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24T13:44:38+00:00

Signed-off-by: Wolfgang Denk 
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini