15 Feb, 2018
1 commit
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Commit 958d55f26ce ("MAINTAINERS: Take over BCM2835 maintainership") put
me in as maintainer for the RPi soc, but forgot to update the board
MAINTAINERS file.Add me there too.
Signed-off-by: Alexander Graf
29 Jan, 2018
2 commits
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We are switching to a model where our board file can directly fail probing
of serial devices when they're not usable, so remove the current runtime
hack we have.Signed-off-by: Alexander Graf
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The bcm283x family of SoCs have a GPIO controller that also acts as
pinctrl controller.This patch introduces a new pinctrl driver that can actually properly mux
devices into their device tree defined pin states and is now the primary
owner of the gpio device. The previous GPIO driver gets moved into a
subdevice of the pinctrl driver, bound to the same OF node.That way whenever a device asks for pinctrl support, it gets it
automatically from the pinctrl driver and GPIO support is still available
in the normal command line phase.Signed-off-by: Alexander Graf
04 Dec, 2017
1 commit
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Signed-off-by: Dmitry Korunov
16 Aug, 2017
4 commits
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We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.Suggested-by: Wolfgang Denk
Signed-off-by: Simon Glass -
Rename this function for consistency with env_set().
Signed-off-by: Simon Glass
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We are now using an env_ prefix for environment functions. Rename these
commonly used functions, for consistency. Also add function comments in
common.h.Suggested-by: Wolfgang Denk
Signed-off-by: Simon Glass -
We are now using an env_ prefix for environment functions. Rename setenv()
for consistency. Also add function comments in common.h.Suggested-by: Wolfgang Denk
Signed-off-by: Simon Glass
09 Jul, 2017
1 commit
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It's been a while since I've touched U-Boot on the Raspberry Pi and
other things have been taking my time. Drop my maintainership for this
port.Signed-off-by: Stephen Warren
10 May, 2017
6 commits
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In some boards like the Raspberry Pi the initial bootloader will pass
a DT to the kernel. When using U-Boot as such kernel, the board code in
U-Boot should be able to provide U-Boot with this, already assembled
device tree blob.This patch introduces a new config option CONFIG_OF_BOARD to use instead
of CONFIG_OF_EMBED or CONFIG_OF_SEPARATE which will initialize the DT
from a board-specific funtion instead of bundling one with U-Boot or as
a separated file. This allows boards like the Raspberry Pi to reuse the
device tree passed from the bootcode.bin and start.elf firmware
files, including the run-time selected device tree overlays.Signed-off-by: Alex Deymo
Reviewed-by: Simon Glass -
Signed-off-by: Paolo Pisati
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The board code should all move into msg.c for consistency. Add a TODO for
this.Signed-off-by: Simon Glass
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Convert the bcm2835 SDHCI driver over to support CONFIG_DM_MMC and move
all boards over. There is no need to keep the old code since there are no
other users.Reviewed-by: Jaehoon Chung
Signed-off-by: Simon Glass -
Move this code into the new message handler file.
Signed-off-by: Simon Glass
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The bcm283x chips provide a way for the ARM core to communicate with the
graphics processor, which is in charge of many things. This is handled by
way of a message prototcol.At present the code for sending message (and receiving a reply) is spread
around U-Boot, primarily in the board file. This means that sending a
message from a driver requires duplicating the code.Create a new message implementation with a function to support powering on
a subsystem as a starting point.Signed-off-by: Simon Glass
24 Jan, 2017
1 commit
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The directory structure of device tree files produced by the kernel's
'make dtbs_install' is different on ARM64, the RPi3 device tree file is
in a 'broadcom' subdirectory there.Signed-off-by: Tuomas Tynkkynen
Acked-by: Stephen Warren
29 Nov, 2016
3 commits
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Firmware provides a spin table on the raspberry pi. This table shouldn't
get overwritten by payloads, so we need to mark it as reserved.Signed-off-by: Alexander Graf
Acked-by: Stephen Warren -
This patch removes use of U_BOOT_DEVICE in board/raspberrypi/rpi/rpi.c,
enables OF_CONTROL in the config and adjusts the rpi_*defconfig configs.Signed-off-by: Fabian Vogt
Reviewed-by: Simon Glass -
When using OF_CONTROL, the disabled value of the mini UART platdata
gets reset after board_early_init_f. So move detection and disabling
to board_init and remove board_early_init_f.
This uses the first device using the mini uart driver, as this method
works reliably with different device trees or even no device tree at all.Signed-off-by: Fabian Vogt
Reviewed-by: Simon Glass
22 Nov, 2016
1 commit
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Raspberry firmware used to pass a FDT blob at a fixed address (0x100),
but this is not true anymore. The address now depends on both the
memory size and the blob size [1].If one wants to passthrough this FDT blob to the kernel, the most
reliable way is to save its address from the r2/x0 register in the
U-Boot entry point and expose it in a environment variable for
further processing.This patch just does this:
- save the provided address in the global variable fw_dtb_pointer
- expose it in ${fdt_addr} if it points to a a valid FDT blobThere are many different ways to use it. One can, for example, use
the following script which will extract from the tree the command
line built by the firmware, then hand over the blob to a previously
loaded kernel:fdt addr ${fdt_addr}
fdt get value bootargs /chosen bootargs
bootz ${kernel_addr_r} - ${fdt_addr}Alternatively, users relying on sysboot/pxe can simply omit any FDT
statement in their extlinux.conf file, U-Boot will automagically pick
${fdt_addr} and pass it to the kernel.[1] https://www.raspberrypi.org/forums//viewtopic.php?f=107&t=134018
Signed-off-by: Cédric Schieli
Acked-by: Stephen Warren
07 Sep, 2016
1 commit
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On the raspberry pi, you can disable the serial port to gain dynamic frequency
scaling which can get handy at times.However, in such a configuration the serial controller gets its rx queue filled
up with zero bytes which then happily get transmitted on to whoever calls
getc() today.This patch adds detection logic for that case by checking whether the RX pin is
mapped to GPIO15 and disables the mini uart if it is not mapped properly.That way we can leave the driver enabled in the tree and can determine during
runtime whether serial is usable or not, having a single binary that allows for
uart and non-uart operation.Signed-off-by: Alexander Graf
Acked-by: Stephen Warren
Reviewed-by: Simon Glass
16 Jul, 2016
1 commit
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Introduce virtual and physical addresses in the mapping table. This change
have no impact on existing boards because they all use idential mapping.Signed-off-by: York Sun
12 Apr, 2016
2 commits
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Now that rpi_*defconfig and Kconfig (rather than the config header file)
provide the identity of the build, we don't need to separate config
headers and board directories for each RPi variant. Set CONFIG_SYS_BOARD
and CONFIG_SYS_CONFIG_NAME so that we can get rid of the duplication. This
requires a tiny number of extra ifdefs in the config header.The only disadvantage of this approach is that the $board/$board_name
environment variables aren't as descriptive as they used to be. This isn't
really an issue because those only exist to allow scripts to create DTB
filenames at runtime. However, the RPi board code already sets $fdtfile to
something more accurate based on FW-reported board ID anyway.While at it, unify some Kconfig select options, and add a MAINTAINERS
entry for bcm283x too.Partially-suggested-by: Tom Rini
Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini -
On all Pis so far, the VC FW provides a short stub to set up the ARM CPU
before entering the kernel (a/k/a U-Boot for us). This feature is not
currently supported by the VC FW when booting in 64-bit mode. However,
this feature will likely appear in the near future, and this U-Boot port
assumes that such a feature is in place. Without that feature, or a
temporary workaround described below, U-Boot will not boot.Once the VC FW does provide the ARM stub, u-boot.bin built for rpi_3 can
be used drectly as kernel7.img, in the same way as any other RPi port. The
following config.txt is required:# Fix mini UART input frequency, and setup/enable up the UART.
# Without this option, U-Boot will not boot, even if you don't care
# about the serial console. This option will always be required for
# all RPi3 use-cases, unless the PL011 UART is used, which is not
# yet supported by rpi_3* builds of U-Boot.
enable_uart=1
# Boot in AArch64 (64-bit) mode.
# It is possible that a future VC FW will remove the need for this
# option, instead auto-setting 32-/64-bit mode based on the "kernel"
# filename present on the SD card.
arm_control=0x200Prior to the VC FW providing the ARM boot stub, you can use the following
steps to build an equivalent stub into the U-Boot binary:git clone https://github.com/swarren/rpi-3-aarch64-demo.git \
../rpi-3-aarch64-demo
(cd ../rpi-3-aarch64-demo && ./build.sh)
Build U-Boot for rpi_3 in the usual way
cat ../rpi-3-aarch64-demo/armstub64.bin u-boot.bin > u-boot.bin.stubbed
Use u-boot.bin.stubbed as kernel7.img on the Pi SD card.In this case, the following additional entries are required in config.txt:
# Tell the FW to load the kernel image at address 0, the reset vector.
kernel_old=1Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini
02 Apr, 2016
3 commits
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The Raspberry Pi 3 contains a BCM2837 SoC. The BCM2837 is a BCM2836 with
the CPU complex swapped out for a quad-core ARMv8. This can operate in 32-
or 64-bit mode. 32-bit mode is the current default selected by the
VideoCore firmware on the Raspberry Pi 3. This patch adds a 32-bit port of
U-Boot for the Raspberry Pi 3.>From U-Boot's perspective, the only delta between the RPi 2 and RPi 3 is a
change in usage of the SoC UARTs. On all previous Pis, the PL011 was the
only UART in use. The Raspberry Pi 3 adds a Bluetooth module which uses a
UART to connect to the SoC. By default, the PL011 is used for this purpose
since it has larger FIFOs than the other "mini" UART. However, this can
be configured via the VideoCore firmware's config.txt file. This patch
hard-codes use of the mini UART in the RPi 3 port. If your system uses the
PL011 UART for the console even on the RPi 3, please use the RPi 2 U-Boot
port instead. A future change might determine which UART to use at
run-time, thus allowing the RPi 2 and RPi 3 (32-bit) ports to be squashed
together.The mini UART has some limitations. One externally visible issue in the
BCM2837 integration is that the UART divides the SoC's "core clock" to
generate the baud rate. The core clock is typically variable, and under
control of the VideoCore firmware for thermal management reasons. If the
VC FW does modify the core clock rate, UART communication will be
corrupted since the baud rate will vary from the expected value. This was
not an issue for the PL011 UART, since it is fed by a fixed 3MHz clock. To
work around this, the VideoCore firmware can be told not to modify the SoC
core clock. However, the only way this can happen and be thermally safe is
to limit the core clock to a low/minimum frequency. This leaves
performance on the table for use-cases that don't care about a UART
console. Consequently, use of the mini UART console must be explicitly
requested by entering the following line into config.txt:enable_uart=1
A recent version of the VC firmware is required to ensure that the mini
UART is fully and correctly initialized by the VC FW; at least
firmware.git 046effa13ebc "firmware: arm_loader: emmc clock depends on
core clock See: https://github.com/raspberrypi/firmware/issues/572".Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini -
This allows U-Boot to known the name of the board.
The existing rpi_2_defconfig can operate correctly on the Raspberry Pi 3
in 32-bit mode /if/ you have configured the firmware to use the PL011 UART
as the console UART (the default is the mini UART). This requires two
things:
a) config.txt should contain dtoverlay=pi3-miniuart-bt
b) You should run the following to tell the VC FW to process DT when
booting, and copy u-boot.bin.img (rather than u-boot.bin) to the SD card
as the kernel image:path/to/kernel/scripts/mkknlimg --dtok u-boot.bin u-boot.bin.img
This works as of firmware.git commit 046effa13ebc "firmware: arm_loader:
emmc clock depends on core clock See:
https://github.com/raspberrypi/firmware/issues/572".Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini -
To simplify support for new SoCs, just use a constant filename
for the unknown case. In practice this case shouldn't be hit anyway, so
the filename isn't relevant, and certainly doesn't need to differentiate
between SoCs. If a user has an as-yet-unknown board, they can override
this value in the environment anyway.Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini
27 Mar, 2016
1 commit
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Currently, CONFIG_BCM2835 is defined for all BCM283x builds and _BCM2836
is defined when building for that SoC. That means there isn't a single
define that means "exactly BCM2835". This will complicate future patches
where BCM2835-vs-anything-else needs to be determined simply.Modify the code to define one or the other of CONFIG_BCM2835/BCM2836 so
future patches are simpler.Signed-off-by: Stephen Warren
Reviewed-by: Tom Rini
23 Mar, 2016
1 commit
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For Raspberry Pi, we had the input clock rate to the pl011 fixed in
the rpi.c file, but it may be changed by firmware due to user changes
to config.txt. Since the firmware always sets up the uart (default
115200 output unless the user changes it), we can just skip our own
uart init to simplify the boot process and more reliably get serial
output.Signed-off-by: Eric Anholt
Reviewed-by: Tom Rini
Tested-by: Stephen Warren
25 Feb, 2016
1 commit
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Gets propagated into the device tree and then into /proc/cpuinfo where
users often expect it.Signed-off-by: Lubomir Rintel
Tested-by: Stephen Warren
Reviewed-by: Stephen Warren
08 Feb, 2016
3 commits
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Let's set "ethaddr" when we get the ethernet address too, so that
fdt_fixup_ethernet() sets the address in the device tree and the Linux
driver can pick it up.Signed-off-by: Lubomir Rintel
Tested-by: Stephen Warren -
The P5 header was not present on "Model B" any board prior to Revision 2.0,
there's no need for a separate device tree.Also, it looks like "rev2" is incorrectly used to only cover the 512MiB
memory models; there also were 256MiB 2.0 boards.I don't have all of the boards to check this, I'm following this table:
http://elinux.org/RPi_HardwareHistory#Board_Revision_HistorySigned-off-by: Lubomir Rintel
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This source has been blessed by Dom Cobley at the RPi Foundation, so seems
like the best source to refer to. It's a superset of and consistent with
the other sources.Cc: Lubomir Rintel
Cc: Eric Anholt
Signed-off-by: Stephen Warren
06 Dec, 2015
3 commits
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For U-Boot's purposes, at present all we care about is ensuring there's
a model table entry.Signed-off-by: Stephen Warren
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The RPi has two different schemes for encoding board revision values.
When adding RPi 2 support, I thought that the conflicting type field
values were to be interpreted based on bcm2835-vs-bcm2836. In fact, the
scheme bit determines the encoding. The RPi Zero uses the bcm2835 yet
uses the new encoding scheme. Fix the code to cater for this correctly.Signed-off-by: Stephen Warren
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There are two numbering schemes for the RPi revision values; old and new
scheme. The values within each scheme overlap. Hence, it doesn't make
sense to have absolute/global names for the revision IDs. Get rid of the
names and just use the raw revision/type values to set up the array of
per-revision data.This change makes most sense when coupled with the next change. However,
it's split out so that the mechanical cut/paste is separate from the
logic changes for easier review and problem bisection.Signed-off-by: Stephen Warren
25 Oct, 2015
1 commit
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Add CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG support and enable it to set
'board_rev' and 'board_name' envs.
'board_rev' can be used in scripts to determine what board we are running on
and 'board_name' for pretty printing.Signed-off-by: Guillaume GARDET
Cc: Stephen Warren
Acked-by: Stephen Warren
19 Oct, 2015
1 commit
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Seen this one in the wild. Is labelled "Raspberry Pi Model A+ V1.1,
(C) Raspberry Pi 2014". A standard A+ board, much like the one with
version 0x12, didn't notice any differencies.Signed-off-by: Lubomir Rintel
12 Sep, 2015
1 commit
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Now that we have a new header file for cache-aligned allocation, we should
move the stack-based allocation macro there also.Signed-off-by: Simon Glass
13 Aug, 2015
1 commit
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The mailbox buffer is required to be at least 16 bytes aligned, but for
cache invalidation and/or flush it needs to be cacheline aligned.
Use ALLOC_CACHE_ALIGN_BUFFER for all mailbox buffer allocations.Signed-off-by: Alexander Stein
Acked-by: Stephen Warren
Tested-by: Stephen Warren
