Mirrors/opensbi
4
0
Fork 1
mirror of https://github.com/riscv-software-src/opensbi.git synced 2025-12-22 06:12:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

platform: generic: eswin: Add shutdown/reboot support for Hifive Premier P550

Browse Source 
Hifive Premier P550[1] is a Mini-DTX form factor board with EIC7700X.
It has a STM32F407VET6 onboard MCU acting as the BMC, controlling
ATX power on/off while providing remote management features. The
EIC7700X SoC/SoM communicates with the BMC via UART2, using ESWIN's
protocol. The messages transmitted are fixed sizes (267 bytes), and
depending on the type, can be directional or bi-directional. The
shutdown and cold reboot requests are directional messages from SoC
to BMC (NOTIFY type) with CMD_POWER_OFF or CMD_RESTART. The payload
of shutdown/cold reboot requests should be empty and are ignored by
the BMC at the moment. A HFP (Hifive Premier) specific reset device
is registered in addition to the SoC reset device. For shutdown and
cold reboot, the board-level reset takes precedence.

The definitions of the SoC <-> BMC message protocol is taken from
ESWIN's repo [2]. The only file used from that repo is `hf_common.h`
It's disjunctively dual licensed as (GPL-2.0-only OR BSD-2-Clause),
hence, compatible with the license of OpenSBI. It's heavily modified
and renamed as platform/generic/include/eswin/hfp.h. The author and
copyright in the original file are retained.

Validated shutdown/cold reboot working on Hifive Premier P550.

[1] https://www.sifive.com/boards/hifive-premier-p550#documentation
[2] https://github.com/eswincomputing/hifive-premier-p550-mcu-patches.git

Signed-off-by: Bo Gan <ganboing@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251218104243.562667-8-ganboing@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Bo Gan
2025-12-18 02:42:43 -08:00
committed by Anup Patel
parent fbff3a7e07
commit 73183a60ab
5 changed files with 207 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
platform/generic/eswin/eic770x.c
View File

@@ -13,6 +13,7 @@
#include <sbi/sbi_hart_pmp.h>
#include <sbi/sbi_hart_protection.h>
#include <eswin/eic770x.h>
#include <eswin/hfp.h>
static struct sbi_hart_protection eswin_eic7700_pmp_protection;
@@ -393,6 +394,7 @@ static int eswin_eic7700_platform_init(const void *fdt, int nodeoff,
}
static const struct fdt_match eswin_eic7700_match[] = {
{ .compatible = "sifive,hifive-premier-p550", .data = &hfp_override },
{ .compatible = "eswin,eic7700" },
{ },
};