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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>
#include <linux/bitops.h>
/* Assert or de-assert SoCFPGA reset manager reset. */
void socfpga_per_reset(u32 reset, int set)
{
unsigned long reg;
u32 rstmgr_bank = RSTMGR_BANK(reset);
switch (rstmgr_bank) {
case 0:
reg = RSTMGR_GEN5_MPUMODRST;
break;
case 1:
reg = RSTMGR_GEN5_PERMODRST;
break;
case 2:
reg = RSTMGR_GEN5_PER2MODRST;
break;
case 3:
reg = RSTMGR_GEN5_BRGMODRST;
break;
case 4:
reg = RSTMGR_GEN5_MISCMODRST;
break;
default:
return;
}
if (set)
setbits_le32(socfpga_get_rstmgr_addr() + reg,
1 << RSTMGR_RESET(reset));
else
clrbits_le32(socfpga_get_rstmgr_addr() + 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, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_PERMODRST);
writel(0xffffffff, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_PER2MODRST);
}
#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,
socfpga_get_sysmgr_addr() + SYSMGR_ISWGRP_HANDOFF_OFFSET(0));
writel(l3rmask,
socfpga_get_sysmgr_addr() + SYSMGR_ISWGRP_HANDOFF_OFFSET(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, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
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, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
/* Remap the bridges into memory map */
writel(l3mask, SOCFPGA_L3REGS_ADDRESS);
}
return;
}
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