GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Copyright (C) 2013 Altera Corporation <www.altera.com>
+ */
+
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/fpga_manager.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+
+static const struct socfpga_reset_manager *reset_manager_base =
+		(void *)SOCFPGA_RSTMGR_ADDRESS;
+static const struct socfpga_system_manager *sysmgr_regs =
+	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+
+/* Assert or de-assert SoCFPGA reset manager reset. */
+void socfpga_per_reset(u32 reset, int set)
+{
+	const u32 *reg;
+	u32 rstmgr_bank = RSTMGR_BANK(reset);
+
+	switch (rstmgr_bank) {
+	case 0:
+		reg = &reset_manager_base->mpu_mod_reset;
+		break;
+	case 1:
+		reg = &reset_manager_base->per_mod_reset;
+		break;
+	case 2:
+		reg = &reset_manager_base->per2_mod_reset;
+		break;
+	case 3:
+		reg = &reset_manager_base->brg_mod_reset;
+		break;
+	case 4:
+		reg = &reset_manager_base->misc_mod_reset;
+		break;
+
+	default:
+		return;
+	}
+
+	if (set)
+		setbits_le32(reg, 1 << RSTMGR_RESET(reset));
+	else
+		clrbits_le32(reg, 1 << RSTMGR_RESET(reset));
+}
+
+/*
+ * Assert reset on every peripheral but L4WD0.
+ * Watchdog must be kept intact to prevent glitches
+ * and/or hangs.
+ */
+void socfpga_per_reset_all(void)
+{
+	const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
+
+	writel(~l4wd0, &reset_manager_base->per_mod_reset);
+	writel(0xffffffff, &reset_manager_base->per2_mod_reset);
+}
+
+#define L3REGS_REMAP_LWHPS2FPGA_MASK	0x10
+#define L3REGS_REMAP_HPS2FPGA_MASK	0x08
+#define L3REGS_REMAP_OCRAM_MASK		0x01
+
+void socfpga_bridges_set_handoff_regs(bool h2f, bool lwh2f, bool f2h)
+{
+	u32 brgmask = 0x0;
+	u32 l3rmask = L3REGS_REMAP_OCRAM_MASK;
+
+	if (h2f)
+		brgmask |= BIT(0);
+	else
+		l3rmask |= L3REGS_REMAP_HPS2FPGA_MASK;
+
+	if (lwh2f)
+		brgmask |= BIT(1);
+	else
+		l3rmask |= L3REGS_REMAP_LWHPS2FPGA_MASK;
+
+	if (f2h)
+		brgmask |= BIT(2);
+
+	writel(brgmask, &sysmgr_regs->iswgrp_handoff[0]);
+	writel(l3rmask, &sysmgr_regs->iswgrp_handoff[1]);
+}
+
+void socfpga_bridges_reset(int enable)
+{
+	const u32 l3mask = L3REGS_REMAP_LWHPS2FPGA_MASK |
+				L3REGS_REMAP_HPS2FPGA_MASK |
+				L3REGS_REMAP_OCRAM_MASK;
+
+	if (enable) {
+		/* brdmodrst */
+		writel(0x7, &reset_manager_base->brg_mod_reset);
+		writel(L3REGS_REMAP_OCRAM_MASK, SOCFPGA_L3REGS_ADDRESS);
+	} else {
+		socfpga_bridges_set_handoff_regs(false, false, false);
+
+		/* Check signal from FPGA. */
+		if (!fpgamgr_test_fpga_ready()) {
+			/* FPGA not ready, do nothing. We allow system to boot
+			 * without FPGA ready. So, return 0 instead of error. */
+			printf("%s: FPGA not ready, aborting.\n", __func__);
+			return;
+		}
+
+		/* brdmodrst */
+		writel(0, &reset_manager_base->brg_mod_reset);
+
+		/* Remap the bridges into memory map */
+		writel(l3mask, SOCFPGA_L3REGS_ADDRESS);
+	}
+	return;
+}