forked from Mirrors/opensbi
lib/utils: reset: Add RPMI System Reset driver
Add RPMI based driver for system reset and enable it in the generic platform defconfig Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
@@ -196,6 +196,7 @@ struct rpmi_message_args {
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enum rpmi_servicegroup_id {
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RPMI_SRVGRP_ID_MIN = 0,
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RPMI_SRVGRP_BASE = 0x0001,
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RPMI_SRVGRP_SYSTEM_RESET = 0x0002,
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RPMI_SRVGRP_ID_MAX_COUNT,
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/* Reserved range for service groups */
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@@ -252,4 +253,30 @@ struct rpmi_base_get_platform_info_resp {
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char plat_info[];
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};
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/** RPMI System Reset ServiceGroup Service IDs */
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enum rpmi_system_reset_service_id {
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RPMI_SYSRST_SRV_ENABLE_NOTIFICATION = 0x01,
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RPMI_SYSRST_SRV_GET_ATTRIBUTES = 0x02,
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RPMI_SYSRST_SRV_SYSTEM_RESET = 0x03,
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RPMI_SYSRST_SRV_ID_MAX_COUNT,
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};
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/** RPMI System Reset types */
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enum rpmi_sysrst_reset_type {
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RPMI_SYSRST_TYPE_SHUTDOWN = 0x0,
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RPMI_SYSRST_TYPE_COLD_REBOOT = 0x1,
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RPMI_SYSRST_TYPE_WARM_REBOOT = 0x2,
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RPMI_SYSRST_TYPE_MAX,
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};
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#define RPMI_SYSRST_ATTRS_FLAGS_RESETTYPE_POS (1)
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#define RPMI_SYSRST_ATTRS_FLAGS_RESETTYPE_MASK \
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(1U << RPMI_SYSRST_ATTRS_FLAGS_RESETTYPE_POS)
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/** Response for system reset attributes */
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struct rpmi_sysrst_get_reset_attributes_resp {
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s32 status;
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u32 flags;
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};
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#endif /* !__RPMI_MSGPROT_H__ */
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@@ -24,6 +24,11 @@ config FDT_RESET_HTIF
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select SYS_HTIF
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default n
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config FDT_RESET_RPMI
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bool "RPMI FDT reset driver"
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depends on FDT_MAILBOX && RPMI_MAILBOX
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default n
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config FDT_RESET_SG2042_HWMON_MCU
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bool "Sophgo SG2042 hwmon MCU FDT reset driver"
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default n
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141
lib/utils/reset/fdt_reset_rpmi.c
Normal file
141
lib/utils/reset/fdt_reset_rpmi.c
Normal file
@@ -0,0 +1,141 @@
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/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 Ventana Micro Systems Inc.
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*
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* Authors:
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* Rahul Pathak <rpathak@ventanamicro.com>
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*/
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_console.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/reset/fdt_reset.h>
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#include <sbi_utils/mailbox/fdt_mailbox.h>
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#include <sbi_utils/mailbox/rpmi_msgprot.h>
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#include <sbi_utils/mailbox/rpmi_mailbox.h>
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/* struct rpmi_sysreset: RPMI System Reset Context */
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struct rpmi_sysreset {
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int warm_reset_support;
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struct mbox_chan *chan;
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};
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static struct rpmi_sysreset sysreset_ctx;
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static int rpmi_system_reset_type_check(u32 reset_type)
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{
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int ret;
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struct rpmi_sysrst_get_reset_attributes_resp resp;
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ret = rpmi_normal_request_with_status(sysreset_ctx.chan,
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RPMI_SYSRST_SRV_GET_ATTRIBUTES, &reset_type,
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rpmi_u32_count(reset_type), rpmi_u32_count(reset_type),
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&resp, rpmi_u32_count(resp), rpmi_u32_count(resp));
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if (ret) {
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return 0;
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}
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return (resp.flags & RPMI_SYSRST_ATTRS_FLAGS_RESETTYPE_MASK) ? 1 : 0;
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}
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/**
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* rpmi_do_system_reset: Do system reset
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*
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* @reset_type: RPMI System Reset Type
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*/
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static void rpmi_do_system_reset(u32 reset_type)
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{
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int ret;
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ret = rpmi_posted_request(sysreset_ctx.chan,
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RPMI_SYSRST_SRV_SYSTEM_RESET,
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&reset_type, rpmi_u32_count(reset_type),
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rpmi_u32_count(reset_type));
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if (ret)
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sbi_printf("system reset failed [type: %d]: ret: %d\n",
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reset_type, ret);
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}
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/**
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* rpmi_system_reset_check: Check the support for
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* various reset types
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*
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* @type: SBI System Reset Type
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* @reason: Reason for system reset
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*/
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static int rpmi_system_reset_check(u32 type, u32 reason)
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{
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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return 1;
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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return sysreset_ctx.warm_reset_support;
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default:
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return 0;
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}
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}
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static void rpmi_system_reset(u32 type, u32 reason)
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{
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u32 reset_type;
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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reset_type = RPMI_SYSRST_TYPE_SHUTDOWN;
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break;
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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reset_type = RPMI_SYSRST_TYPE_COLD_REBOOT;
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break;
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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reset_type = RPMI_SYSRST_TYPE_WARM_REBOOT;
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break;
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default:
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return;
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}
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rpmi_do_system_reset(reset_type);
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}
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static struct sbi_system_reset_device rpmi_reset_dev = {
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.name = "rpmi-system-reset",
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.system_reset_check = rpmi_system_reset_check,
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.system_reset = rpmi_system_reset,
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};
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static int rpmi_reset_init(const void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int ret;
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/* If channel already available then do nothing. */
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if (sysreset_ctx.chan)
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return 0;
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/*
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* If channel request failed then other end does not support
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* system reset group so do nothing.
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*/
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ret = fdt_mailbox_request_chan(fdt, nodeoff, 0, &sysreset_ctx.chan);
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if (ret)
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return SBI_ENODEV;
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sysreset_ctx.warm_reset_support =
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rpmi_system_reset_type_check(RPMI_SYSRST_TYPE_WARM_REBOOT);
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sbi_system_reset_add_device(&rpmi_reset_dev);
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return SBI_OK;
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}
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static const struct fdt_match rpmi_reset_match[] = {
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{ .compatible = "riscv,rpmi-system-reset" },
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{},
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};
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struct fdt_driver fdt_reset_rpmi = {
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.match_table = rpmi_reset_match,
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.init = rpmi_reset_init,
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};
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@@ -29,3 +29,6 @@ libsbiutils-objs-$(CONFIG_FDT_RESET_SUNXI_WDT) += reset/fdt_reset_sunxi_wdt.o
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carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_SYSCON) += fdt_syscon_poweroff
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carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_SYSCON) += fdt_syscon_reboot
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libsbiutils-objs-$(CONFIG_FDT_RESET_SYSCON) += reset/fdt_reset_syscon.o
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carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_RPMI) += fdt_reset_rpmi
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libsbiutils-objs-$(CONFIG_FDT_RESET_RPMI) += reset/fdt_reset_rpmi.o
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@@ -29,6 +29,7 @@ CONFIG_FDT_RESET=y
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CONFIG_FDT_RESET_ATCWDT200=y
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CONFIG_FDT_RESET_GPIO=y
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CONFIG_FDT_RESET_HTIF=y
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CONFIG_FDT_RESET_RPMI=y
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CONFIG_FDT_RESET_SUNXI_WDT=y
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CONFIG_FDT_RESET_SG2042_HWMON_MCU=y
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CONFIG_FDT_RESET_SYSCON=y
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