The Amlogic Meson SoCs ROM supports a boot over USB with a custom protocol.
When no other boot medium are available (or by forcing the USB mode), the
ROM sets the primary USB port as device mode and waits for a Host to
enumerate.
When enumerated, a custom protocol described at [1] permits writing to
memory and execute some specific FIP init code to run the loaded
Arm Trusted Firmware BL2 and BL3 stages before running the BL33 stage.
In this mode, we can load different binaries that can be used by U-boot
like a script image file.
This adds support for a custom USB boot stage only available when the
boot mode is USB and the script file at a pre-defined address is valid.
This support was heavily copied from the Sunxi Allwinner FEL U-Boot support.
The tool pyamlboot described at [2], permits using this boot mode on boards
exposing the first USB port, either as OTG or Host port.
[1] https://github.com/superna9999/pyamlboot/blob/master/PROTOCOL.md
[2] https://github.com/superna9999/pyamlboot/blob/master/README.md
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This patch adds a minimal clock driver for the Amlogic AXG SoC to handle
the basic gates and PLLs.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This patch adds support for the Amlogic AXG SoC, which is very close from
the Amlogic GXL SoCs with :
- Same 4xCortex-A53 CPUs but clocked at 1.2GHZ max
- DDR Interface limited to DDR4 16bit
- The whole physical register address space has been moved to 0xfxxxxxxx
- The pinctrl setup has changed
- The clock tree is different enough to use a different driver
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
We are about to add support for the Amlogic AXG SoC. While very close to
the Gx SoC family, we will need to handle a few thing which are different
in this SoC. Rework the meson arch directory to prepare for this.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Use the clk framework to initialize clocks from drivers that need them
instead of having hardcoded frequencies and initializations from board
code.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Introduce a basic clock driver for Amlogic Meson SoCs which supports
enabling/disabling clock gates and getting their frequency.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Taking into account the Amlogic Family name starts with GX, including
the GXBB, GXL and GXM SoCs.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
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>
As discussed at [1], the Amlogic Meson GX SoCs can embed a BL31 firmware
and a secondary BL32 firmware.
Since mid-2017, the reserved memory address of the BL31 firmware was moved
and grown for security reasons.
But mainline U-Boot and Linux has the old address and size fixed.
These SoCs have a register interface to get the two firmware reserved
memory start and sizes.
This patch adds a dynamic reservation of the memory zones in the device tree bootmem
reserved memory zone used by the kernel in early boot.
To be complete, the memory zones are also added to the EFI reserved zones.
Depends on patchset "Add support for Amlogic GXL Based SBCs" at [2].
[1] http://lists.infradead.org/pipermail/linux-amlogic/2017-October/004860.html
[2] http://lists.infradead.org/pipermail/linux-amlogic/2017-November/005410.html
Changes since v1:
- switched the #if to if(IS_ENABLED()) to compile all code paths
- renamed function to meson_board_add_reserved_memory()
- added a mem.h header with comment
- updated all boards ft_board_setup()
Changes since RFC v2:
- reduced preprocessor load
- kept Odroid-C2 static memory mapping as exception
Changes since RFC v1:
- switch to fdt rsv mem table and efi reserve memory
- replaced in_le32 by readl()
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
[trini: Fix warning on khadas-vim over missing <asm/arch/mem.h>
Signed-off-by: Tom Rini <trini@konsulko.com>
Introduce a generic common Ethernet Hardware init function
common to all Amlogic GX SoCs with support for the
Internal PHY enable for GXL SoCs.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Add a driver for the I2C controller available on Amlogic Meson SoCs.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
On Amlogic Meson GXL/GXM, supplementary ethernet configuration registers
were added to configure the internal RMII PHY interface.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit adds GPIO support to the Amlogic Meson pin controller
driver, based on code from Linux kernel.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
This driver implements MMC support on Meson GX (S905) based systems.
It's based on Carlo Caione's work, changes:
- BLK support added
- general refactoring
Signed-off-by: Carlo Caione <carlo@caione.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Vagrant Cascadian <vagrant@debian.org>
Remove the device definition from board file, update the driver with
the new compatible property and update config with necessary options.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a
board definition for ODROID-C2. This initial submission only supports
UART and Ethernet (through the existing Designware driver). DTS files
are the ones submitted to Linux arm-soc for 4.7 [1].
[1] https://patchwork.ozlabs.org/patch/603583/
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
