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Ryan Chen <[email protected]> says:
AST2700 is the 8th generation of Integrated Remote Management
Processor introduced by ASPEED Technology Inc. It is a Board
Management Controller (BMC) SoC family with a dual-die architecture:
SoC0 ("CPU" die with four ARM Cortex-A35 application cores) and
SoC1 ("IO" die with peripherals) each SoC have its own SCU PLLs,
clock dividers and reset domains.
Link: https://lore.kernel.org/r/[email protected]
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Add a SDRAM controller driver for the AST2700, derived from the
existing AST2700 controller code used by the Ibex SPL but adapted
to run from ARM U-Boot proper on the Cortex-A35 cores.
The DDR4/DDR5 controller and its DesignWare PHY are programmed by
the Ibex SPL before ARM U-Boot proper takes over. This driver
reads back the configuration left by the SPL, probes the
controller, and exposes ram_info (base and size, with the VGA
carve-out subtracted) via UCLASS_RAM so that dram_init() can
populate gd->ram_size.
The PHY firmware-load entry points (dwc_ddrphy_phyinit_userCustom_*)
are kept compiled but call a __weak fmc_hdr_get_prebuilt() stub
when ARM U-Boot proper is the caller; the real implementation is
provided by the Ibex SPL via the same fmc_hdr.h descriptor format
(here added for the ARM build).
Adds the supporting register-layout headers under
arch/arm/include/asm/arch-aspeed/:
- sdram.h: SDRAM controller and DWC PHY register definitions
- scu.h: SCU bits referenced by the SDRAM driver
- fmc_hdr.h: prebuilt-blob descriptor (binary-compatible with
arch/riscv/include/asm/arch-ast2700/fmc_hdr.h used
by the Ibex SPL)
Signed-off-by: Ryan Chen <[email protected]>
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Restyle all Kconfigs for the rest of "drivers":
Menu entries : no space left
Menu attributes: 1 TAB
Help text : 1 TAB + 2 spaces
Replace '---help---' by 'help'
Signed-off-by: Johan Jonker <[email protected]>
[trini: Add missing indentation on a few more multi-paragraph help texts]
Signed-off-by: Tom Rini <[email protected]>
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Add driver for AST2700 to initialize DRAM in SPL.
This patch also refactors the Kconfig dependency of
Aspeed DRAM drivers as some of them are shared among
the file structures of RV and ARM ISAs.
Signed-off-by: Chia-Wei Wang <[email protected]>
Acked-by: Leo Yu-Chi Liang <[email protected]>
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Ensure the ASPEED related options are grouped together under the RAM
option when enabling support.
This also makes some minor grammar corrections and renames options so
they present cleanly in menuconfig.
There should be no functional change to the configuration or binary.
Signed-off-by: Joel Stanley <[email protected]>
Reviewed-by: Dylan Hung <[email protected]>
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default n/no doesn't need to be specified. It is default option anyway.
Signed-off-by: Michal Simek <[email protected]>
[trini: Rework FSP_USE_UPD portion]
Signed-off-by: Tom Rini <[email protected]>
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AST2600 supports DDR4 SDRAM with maximum speed DDR4-1600.
The DDR4 DRAM types including 128MbX16 (2Gb), 256MbX16 (4Gb),
512MbX16 (8Gb), 1GbX16 (16Gb), and 1GbX8 TwinDie (16Gb) are supported.
Signed-off-by: Dylan Hung <[email protected]>
Signed-off-by: Chia-Wei, Wang <[email protected]>
Reviewed-by: Ryan Chen <[email protected]>
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the aspeed ddr sdram controller needs to know if the memory chip mounted on
the board is dual x8 die or not. Or it may get the wrong size of the
memory space.
Signed-off-by: Dylan Hung <[email protected]>
Reviewed-by: Ryan Chen <[email protected]>
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