Commit graph

29 commits

Author SHA1 Message Date
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Tom Rini
d024236e5a Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTR
We have a large number of places where while we historically referenced
gd in the code we no longer do, as well as cases where the code added
that line "just in case" during development and never dropped it.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-04-27 14:54:48 -04:00
Masahiro Yamada
4b28f7bc93 mmc: let mmc_of_parse() fail for insane bus-width value
You must fix your DT if it specifies insane bus-width, for example,
  bus-width = <3>;

debug() is not displayed in usual configuration, so people will not
even notice weirdness.  Use dev_err() instead, then let it fail.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-22 14:11:58 +09:00
Masahiro Yamada
c42ee367fd mmc: do not overwrite cfg->f_max if "max-frequency" if missing
mmc_of_parse() in U-Boot is a pussy helper; it sets cfg->f_max to
52MHz even if DT does not provide "max-frequency" at all.  This can
overwrite cfg->f_max that may have been set to a reasonable default.

As the DT binding says, "max-frequency" is an optional property.
Do nothing if DT does not specify it.  This is the behavior of
mmc_of_parse() in Linux.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-22 14:11:58 +09:00
Jean-Jacques Hiblot
d6400c3f85 mmc: add a Kconfig option to enable the support for MMC write operations
This allows using CONFIG_IS_ENABLED(MMC_WRITE) to compile out code
needed only if write support is required.
The option is added for u-boot and for SPL

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:24 +09:00
Jean-Jacques Hiblot
f99c2efe56 mmc: make UHS and HS200 optional
Supporting USH and HS200 increases the code size as it brings in IO voltage
control, tuning and fatter data structures.
Use Kconfig configuration to select which of those features should be
built in.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:04 +09:00
Jean-Jacques Hiblot
7abff2c3b3 dm: mmc: update mmc_of_parse()
* convert to livetree API
* don't fail because of an invalid bus-width, instead default to 1-bit.
* recognize 1.2v DDR and 1.2v HS200 flags

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:04 +09:00
Kishon Vijay Abraham I
9215ef5ed5 dm: mmc: Add a library function to parse generic dt binding
Add a new function to parse host controller dt node and
set mmc_config. This function can be used by mmc controller
drivers to set the generic mmc_config.
This function can be extended to set other UHS mode caps
once UHS mode support is added.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:04 +09:00
Jean-Jacques Hiblot
c10b85d6c2 mmc: Add support for UHS modes
Add UHS modes to the list of supported modes, get the UHS capabilites of
the SDcard and implement the procedure to switch the voltage (UHS modes
use 1v8 IO lines)
During the voltage switch procedure, DAT0 is used by the card to signal
when it's ready. The optional card_busy() callback can be used to get this
information from the host driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2018-01-12 18:11:04 +09:00
Kishon Vijay Abraham I
ec841209a7 mmc: Add a execute_tuning() callback to the mmc operations.
Tuning is a mandatory step in the initialization of SDR104 and HS200 modes.
This callback execute the tuning process.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:04 +09:00
Jean-Jacques Hiblot
318a7a576b mmc: Add a new callback function to perform the 74 clocks cycle sequence
Add a new callback function *send_init_stream* which start a sequence of
at least 74 clock cycles.
The mmc core uses *mmc_send_init_stream* in order to invoke the callback
function. This will be used during power cycle where the specification
requires such a sequence after power up.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2018-01-12 18:11:04 +09:00
Simon Glass
e7881d85a9 dm: mmc: Drop CONFIG_DM_MMC_OPS
All boards which use DM_MMC have now been converted to use DM_MMC_OPS.
Drop the option and good riddance.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-17 16:59:55 +09:00
Simon Glass
c4d660d4d0 dm: mmc: Allow disabling driver model in SPL
At present if U-Boot proper uses driver model for MMC, then SPL has to
also. While this is desirable, it places a significant barrier to moving
to driver model in some cases. For example, with a space-constrained SPL
it may be necessary to enable CONFIG_SPL_OF_PLATDATA which involves
adjusting some drivers.

Add new SPL versions of the options for DM_MMC, DM_MMC_OPS and BLK. By
default these follow their non-SPL versions, but this can be changed by
boards which need it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-01 11:58:00 +09:00
Simon Glass
9752564722 dm: mmc: Avoid probing block devices in find_mmc_device()
We do not need to probe the block device here, so avoid doing so. The MMC
device itself must be active, but the block device can come later.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-09 20:25:16 +09:00
Simon Glass
66e0ed5c17 dm: mmc: Convert uclass to livetree
Update the mmc uclass to support a live device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:13 -06:00
Simon Glass
854f9a71f5 dm: mmc: Rewrite mmc_blk_probe()
This function is called when the MMC block device is being probed. There
is a recursive call in this function since find_mmc_device() itself can
cause the MMC device to be probed.

Admittedly the MMC device should already be probed, since we would not be
probing its child otherwise, but the current code is unnecessarily
convoluted.

Rewrite this to access the MMC structure directly.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:05 -06:00
Simon Glass
66656020ff dm: mmc: Check that drivers have operations
When binding a new MMC device, make sure that it has the required
operations. Since for now we still support *not* having the operations
(with CONFIG_DM_MMC_OPS not enabled) it makes sense to add this check.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:05 -06:00
Simon Glass
da409ccc4a dm: core: Replace of_offset with accessor (part 2)
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:04 -06:00
Stefan Roese
706865afe5 dm: core: Add flags parameter to device_remove()
This patch adds the flags parameter to device_remove() and changes all
calls to this function to provide the default value of DM_REMOVE_NORMAL
for "normal" device removal.

This is in preparation for the driver specific pre-OS (e.g. DMA
cancelling) remove support.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
2017-04-04 20:15:10 -06:00
Fiach Antaw
a0269bb6e8 mmc: init mmc block devices on probe
MMC devices accessed exclusively via the driver model were not
being initialized before being exposed as block devices, causing
issues in scenarios where the MMC device is first accessed via the
uclass block interface.

Signed-off-by: Fiach Antaw <fiach.antaw@uqconnect.edu.au>
2017-02-09 20:37:06 +09:00
Jaehoon Chung
02ad33aa3a mmc: mmc-uclass: use the fixed devnum with alias node
If there are alias nodes as "mmc", use the devnum as alias index
number.
This patch is for fixing a problem of Exynos4 series.
Problem is the below thing.

Current legacy mode:
EXYNOS DWMMC: 0, SAMSUNG SDHCI: 1

After using DM:
SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1

Dev index is swapped.
Then u-boot can't find the kernel image..because it is already set to 0 as mmcdev.
If change from legacy to DM, also needs to touch all exynos4 config file.
For using simply, just supporting the fixed devnum with alias node is better than it.

Usage:
alaise {
	....
	mmc0 = &sdhci2; /* eMMC */
	mmc1 = &sdhci1; /* SD */
	...
}

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-02-09 20:37:05 +09:00
Masahiro Yamada
dd399cb736 mmc: refactor two core functions
Drop unneeded variables and assignments.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-10-28 11:02:16 +09:00
Simon Glass
561e624c35 dm: mmc: Support erase
At present erase is not suported with CONFIG_DM_OPS. Add it so that MMC
devices can be erased.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-10-09 21:36:27 -06:00
Xu Ziyuan
1bd4f92cdb mmc: display mmc list information like mmc_legacy type
It's nicer to see this:

=> mmc list
dwmmc@ff0c0000: 0
dwmmc@ff0f0000: 1 (eMMC)

than this:

=> mmc list
dwmmc@ff0c0000: 0dwmmc@ff0f0000: 1 (eMMC)

With the former, it's much clearer which mmc devices are on.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
2016-08-05 11:21:25 +09:00
Kever Yang
46683f3da1 mmc-uclass: correct the device number
Not like the mmc-legacy which the devnum starts from 1, it starts from 0
in mmc-uclass, so the device number should be (devnum + 1) in get_mmc_num().

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2016-07-31 07:24:20 -06:00
Simon Glass
8ca51e51c1 dm: mmc: Add a way to use driver model for MMC operations
The driver model conversion for MMC has moved in small steps. The first step
was to have an MMC device (CONFIG_DM_MMC). The second was to use a child
block device (CONFIG_BLK). The final one is to use driver model for MMC
operations (CONFIG_DM_MMC_OP). Add support for this.

The immediate priority is to make all boards that use DM_MMC also use those
other two options. This will allow them to be removed.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-11 14:06:44 -06:00
Simon Glass
eede897e27 dm: mmc: Move CONFIG_BLK code into the mmc uclass
Rather than having #ifdef in mmc.c, move this code into the uclass file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-11 14:06:44 -06:00
Simon Glass
8ef761ed4c dm: mmc: Implement the MMC functions for block devices
Implement the functions in mmc_legacy.c for driver-model block devices, so
that MMC can use driver model for these. This allows CONFIG_BLK to be enabled
with DM_MMC.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-17 09:54:43 -06:00
Simon Glass
e7ecf7cb5a dm: mmc: Add an MMC uclass
Add basic support for MMC, providing a uclass which can set up an MMC
device. This allows MMC drivers to move to using driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-07-21 17:39:25 -06:00