opensbi: weekly rls 2024.07.20

-0aa741, support cv181x/cv180x suspend to ram.

Change-Id: I64dcb0ff942aa7238a88ef3bd1da2c67f5d089b4

platform/generic/cvitek_riscv.c

@@ -0,0 +1,107 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#include <platform_override.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/fdt/fdt_fixup.h>
+#include <sbi/sbi_system.h>
+#include <sbi/sbi_ecall_interface.h>
+#include <sbi/sbi_string.h>
+#include <sbi/sbi_types.h>
+#include <sbi/sbi_error.h>
+#include <sbi/riscv_asm.h>
+#include <sbi/riscv_io.h>
+
+__asm__(".section .rodata\n"
+	".global suspend_sram_entry\n"
+	".global suspend_sram_end\n"
+	".type suspend_sram_entry, @object\n"
+	".type suspend_sram_end, @object\n"
+	".align 4\n"
+	"suspend_sram_entry:\n"
+	".incbin \"" STRINGIFY(PM_SRAM_BIN_PATH) "\"\n"
+	".align 4\n"
+	"suspend_sram_end:\n"
+	".text\n");
+
+#define RTC_SRAM_FLAG_ADDR 0x05026ff8
+#ifdef CONFIG_CV180X
+#define SUSPEND_SRAM_ENTRY 0x3C000000
+#endif
+#ifdef CONFIG_CV181X
+#define SUSPEND_SRAM_ENTRY 0xC030000
+#endif
+#define memcpy sbi_memcpy
+
+static void rtc_latch_pinmux_settings(void)
+{
+	writel(0x2, (void *)0x50250ac);
+	writel(0x0, (void *)0x5027084);
+	//TODO
+}
+
+static void rtc_power_saving_settings_for_suspend(void)
+{
+	//TODO
+}
+
+static int cvitek_sbi_system_suspend_check(u32 sleep_type)
+{
+	return sleep_type == SBI_SUSP_SLEEP_TYPE_SUSPEND ? 0 : SBI_EINVAL;
+}
+
+static int cvitek_sbi_system_suspend(u32 sleep_type,
+				unsigned long mmode_resume_addr)
+{
+	void (*suspend)(void) = (void *)SUSPEND_SRAM_ENTRY;
+
+	if (sleep_type != SBI_SUSP_SLEEP_TYPE_SUSPEND)
+		return SBI_EINVAL;
+
+	rtc_latch_pinmux_settings();
+	rtc_power_saving_settings_for_suspend();
+
+	/* store warmboot entry for resume*/
+	writel(mmode_resume_addr, (void *)RTC_SRAM_FLAG_ADDR);
+	writel(readl((void *)0x03002000) | 0x10, (void *)0x03002000); //enable TPU clock
+	memcpy((void *)SUSPEND_SRAM_ENTRY, suspend_sram_entry, suspend_sram_end - suspend_sram_entry);
+
+	asm volatile("fence.i" ::: "memory");
+
+	asm volatile("fence rw,rw\n\t");
+
+	suspend();
+
+	wfi();
+
+	return SBI_OK;
+}
+
+static struct sbi_system_suspend_device cvitek_sbi_suspend_device = {
+	.name = "cvi-suspend",
+	.system_suspend_check = cvitek_sbi_system_suspend_check,
+	.system_suspend = cvitek_sbi_system_suspend,
+};
+
+static int cvitek_riscv_early_init(bool cold_boot, const struct fdt_match *match)
+{
+	sbi_system_suspend_set_device(&cvitek_sbi_suspend_device);
+
+	return 0;
+}
+
+static const struct fdt_match cvitek_riscv_match[] = {
+	{ .compatible = "cvitek,cv180x" },
+	{ .compatible = "cvitek,cv181x" }
+};
+
+const struct platform_override cvitek_riscv = {
+	.match_table = cvitek_riscv_match,
+	.early_init = cvitek_riscv_early_init,
+};

platform/generic/include/platform_override.h

@@ -12,6 +12,11 @@
 
 #include <sbi/sbi_types.h>
 
+extern const struct platform_override sifive_fu540;
+extern const struct platform_override cvitek_riscv;
+extern u8 suspend_sram_entry[];
+extern u8 suspend_sram_end[];
+
 struct platform_override {
 	const struct fdt_match *match_table;
 	u64 (*features)(const struct fdt_match *match);

platform/generic/objects.mk

@@ -9,3 +9,4 @@
 
 platform-objs-y += platform.o
 platform-objs-y += sifive_fu540.o
+platform-objs-y += cvitek_riscv.o

platform/generic/platform.c

@@ -22,10 +22,9 @@
 #include <sbi_utils/ipi/fdt_ipi.h>
 #include <sbi_utils/reset/fdt_reset.h>
 
-extern const struct platform_override sifive_fu540;
-
 static const struct platform_override *special_platforms[] = {
 	&sifive_fu540,
+	&cvitek_riscv,
 };
 
 static const struct platform_override *generic_plat = NULL;