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https://github.com/brain-hackers/u-boot-brain
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ba2cfcee88
Instead of just putting the bridges into reset, fully remove the bridges from the L3 main bridge space when disabling them by clearing bits in NIC-301 remap register. Moreover, only touch the 3 LSbits in brgmodrst register as the rest of the bits are undefined. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chin Liang See <chin.liang.see@intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Cc: Tien Fong Chee <tien.fong.chee@intel.com>
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013 Altera Corporation <www.altera.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/fpga_manager.h>
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#include <asm/arch/reset_manager.h>
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#include <asm/arch/system_manager.h>
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static const struct socfpga_reset_manager *reset_manager_base =
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(void *)SOCFPGA_RSTMGR_ADDRESS;
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static const struct socfpga_system_manager *sysmgr_regs =
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(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
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/* Assert or de-assert SoCFPGA reset manager reset. */
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void socfpga_per_reset(u32 reset, int set)
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{
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const u32 *reg;
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u32 rstmgr_bank = RSTMGR_BANK(reset);
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switch (rstmgr_bank) {
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case 0:
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reg = &reset_manager_base->mpu_mod_reset;
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break;
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case 1:
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reg = &reset_manager_base->per_mod_reset;
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break;
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case 2:
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reg = &reset_manager_base->per2_mod_reset;
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break;
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case 3:
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reg = &reset_manager_base->brg_mod_reset;
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break;
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case 4:
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reg = &reset_manager_base->misc_mod_reset;
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break;
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default:
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return;
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}
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if (set)
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setbits_le32(reg, 1 << RSTMGR_RESET(reset));
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else
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clrbits_le32(reg, 1 << RSTMGR_RESET(reset));
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}
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/*
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* Assert reset on every peripheral but L4WD0.
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* Watchdog must be kept intact to prevent glitches
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* and/or hangs.
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*/
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void socfpga_per_reset_all(void)
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{
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const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
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writel(~l4wd0, &reset_manager_base->per_mod_reset);
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writel(0xffffffff, &reset_manager_base->per2_mod_reset);
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}
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/*
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* Release peripherals from reset based on handoff
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*/
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void reset_deassert_peripherals_handoff(void)
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{
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writel(0, &reset_manager_base->per_mod_reset);
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}
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#define L3REGS_REMAP_LWHPS2FPGA_MASK 0x10
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#define L3REGS_REMAP_HPS2FPGA_MASK 0x08
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#define L3REGS_REMAP_OCRAM_MASK 0x01
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void socfpga_bridges_set_handoff_regs(bool h2f, bool lwh2f, bool f2h)
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{
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u32 brgmask = 0x0;
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u32 l3rmask = L3REGS_REMAP_OCRAM_MASK;
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if (h2f)
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brgmask |= BIT(0);
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else
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l3rmask |= L3REGS_REMAP_HPS2FPGA_MASK;
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if (lwh2f)
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brgmask |= BIT(1);
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else
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l3rmask |= L3REGS_REMAP_LWHPS2FPGA_MASK;
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if (f2h)
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brgmask |= BIT(2);
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writel(brgmask, &sysmgr_regs->iswgrp_handoff[0]);
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writel(l3rmask, &sysmgr_regs->iswgrp_handoff[1]);
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}
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void socfpga_bridges_reset(int enable)
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{
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const u32 l3mask = L3REGS_REMAP_LWHPS2FPGA_MASK |
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L3REGS_REMAP_HPS2FPGA_MASK |
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L3REGS_REMAP_OCRAM_MASK;
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if (enable) {
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/* brdmodrst */
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writel(0x7, &reset_manager_base->brg_mod_reset);
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writel(L3REGS_REMAP_OCRAM_MASK, SOCFPGA_L3REGS_ADDRESS);
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} else {
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socfpga_bridges_set_handoff_regs(false, false, false);
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/* Check signal from FPGA. */
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if (!fpgamgr_test_fpga_ready()) {
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/* FPGA not ready, do nothing. We allow system to boot
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* without FPGA ready. So, return 0 instead of error. */
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printf("%s: FPGA not ready, aborting.\n", __func__);
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return;
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}
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/* brdmodrst */
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writel(0, &reset_manager_base->brg_mod_reset);
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/* Remap the bridges into memory map */
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writel(l3mask, SOCFPGA_L3REGS_ADDRESS);
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}
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return;
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}
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