reset_manager.c
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/*
* Copyright (C) 2013 Altera Corporation <www.altera.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/fpga_manager.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct socfpga_reset_manager *reset_manager_base =
(void *)SOCFPGA_RSTMGR_ADDRESS;
/* Toggle reset signal to watchdog (WDT is disabled after this operation!) */
void socfpga_watchdog_reset(void)
{
/* assert reset for watchdog */
setbits_le32(&reset_manager_base->per_mod_reset,
1 << RSTMGR_PERMODRST_L4WD0_LSB);
/* deassert watchdog from reset (watchdog in not running state) */
clrbits_le32(&reset_manager_base->per_mod_reset,
1 << RSTMGR_PERMODRST_L4WD0_LSB);
}
/*
* Write the reset manager register to cause reset
*/
void reset_cpu(ulong addr)
{
/* request a warm reset */
writel((1 << RSTMGR_CTRL_SWWARMRSTREQ_LSB),
&reset_manager_base->ctrl);
/*
* infinite loop here as watchdog will trigger and reset
* the processor
*/
while (1)
;
}
/*
* Release peripherals from reset based on handoff
*/
void reset_deassert_peripherals_handoff(void)
{
writel(0, &reset_manager_base->per_mod_reset);
}
#if defined(CONFIG_SOCFPGA_VIRTUAL_TARGET)
void socfpga_bridges_reset(int enable)
{
/* For SoCFPGA-VT, this is NOP. */
}
#else
#define L3REGS_REMAP_LWHPS2FPGA_MASK 0x10
#define L3REGS_REMAP_HPS2FPGA_MASK 0x08
#define L3REGS_REMAP_OCRAM_MASK 0x01
void socfpga_bridges_reset(int enable)
{
const uint32_t l3mask = L3REGS_REMAP_LWHPS2FPGA_MASK |
L3REGS_REMAP_HPS2FPGA_MASK |
L3REGS_REMAP_OCRAM_MASK;
if (enable) {
/* brdmodrst */
writel(0xffffffff, &reset_manager_base->brg_mod_reset);
} else {
/* Check signal from FPGA. */
if (fpgamgr_poll_fpga_ready()) {
/* FPGA not ready. Wait for watchdog timeout. */
printf("%s: fpga not ready, hanging.\n", __func__);
hang();
}
/* brdmodrst */
writel(0, &reset_manager_base->brg_mod_reset);
/* Remap the bridges into memory map */
writel(l3mask, SOCFPGA_L3REGS_ADDRESS);
}
}
#endif
/* Change the reset state for EMAC 0 and EMAC 1 */
void socfpga_emac_reset(int enable)
{
const void *reset = &reset_manager_base->per_mod_reset;
if (enable) {
setbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC0_LSB);
setbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC1_LSB);
} else {
#if (CONFIG_EMAC_BASE == SOCFPGA_EMAC0_ADDRESS)
clrbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC0_LSB);
#elif (CONFIG_EMAC_BASE == SOCFPGA_EMAC1_ADDRESS)
clrbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC1_LSB);
#endif
}
}