Newer firmware can manage the SDCDIV clock divisor register, allowing
the divisor to scale with the core as necessary.
Leverage this ability if the firmware supports it.
Adapted from the following raspberrypi Linux kernel commit:
bcm2835-sdhost: Firmware manages the clock divisor
08532d242d
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).
Rename some of the latter variables to end with 'plat' for consistency.
Signed-off-by: Simon Glass <sjg@chromium.org>
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.
Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.
Signed-off-by: Simon Glass <sjg@chromium.org>
When you enable CONFIG_OF_LIVE, you will end up with a lot of
conversions.
To generate this commit, I used coccinelle excluding drivers/core/,
include/dm/, and test/
The semantic patch that makes this change is as follows:
<smpl>
@@
expression dev;
@@
-devfdt_get_addr(dev)
+dev_read_addr(dev)
</smpl>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When you enable CONFIG_OF_LIVE, you will end up with a lot of
conversions.
To generate this commit, I used coccinelle excluding drivers/core/,
include/dm/, and test/
The semantic patch that makes this change is as follows:
<smpl>
@@
expression dev;
@@
-devfdt_get_addr(dev)
+dev_read_addr(dev)
</smpl>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
At present dm/device.h includes the linux-compatible features. This
requires including linux/compat.h which in turn includes a lot of headers.
One of these is malloc.h which we thus end up including in every file in
U-Boot. Apart from the inefficiency of this, it is problematic for sandbox
which needs to use the system malloc() in some files.
Move the compatibility features into a separate header file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Function bcm_2835_wait_transfer_complete() is not waiting long enough.
The previous code was claiming to wait for ~1 seconds, but as it depends
on register reads it's time actually varies.
Some cards require wait times of up to ~56 ms to perform
the command 'saveenv' on an EXT4 partition.
Re-implement the loop exit condition to use get_timer() which allows
to specify the wait time in more reliable manner. Set the maximum wait
time to the originally intended 1 second.
Signed-off by: Raul Benet <raul.benet_at_kaptivo.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
The bcm2835 sdhost driver has a problem with "write multiple" commands.
It seems to boil down to the fact that the controller dislikes its FIFO
to get drained at the end of a block when a write multiple blocks command
is in flight.
The easy fix is to simply get rid of all the IRQ driven logic and make
the driver push as much data into the FIFO as it can. That way we never
drain and we never run into the problem.
Reported-by: Jan Leonhardt <jan@cyberdesigner.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
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>
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>
In raspberrypi-firmware 7fdcd00e00a42a1c91e8bd6f5eb8352fe9358557 and
later start.elf now sets the EMMC clock to 200 MHz.
According to Phil Elwell in
https://github.com/raspberrypi/firmware/issues/953
the SDHost controller shares the core/VPU clock and doesn't use
the EMMC clock.
Use the core clock id when determining the frequency to allow
U-Boot to work with recent versions of raspberrypi-firmware.
Otherwise U-Boot hangs at:
U-Boot 2018.03 (Mar 14 2018 - 20:36:00 +1100)
DRAM: 948 MiB
RPI 3 Model B (0xa02082)
MMC: mmc@7e202000: 0, sdhci@7e300000: 1
Loading Environment from FAT...
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
The BCM2835 family of SoCs has 2 different SD controllers: One based on
the SDHCI spec and a custom, home-grown one.
This patch implements a driver for the latter based on the Linux driver.
This is needed so that we can make use of device trees that assume driver
presence of both SD controllers.
Signed-off-by: Alexander Graf <agraf@suse.de>
