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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
*
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/system_manager.h>
#include <dt-bindings/reset/altr,rst-mgr-s10.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct socfpga_reset_manager *reset_manager_base =
(void *)SOCFPGA_RSTMGR_ADDRESS;
static const struct socfpga_system_manager *system_manager_base =
(void *)SOCFPGA_SYSMGR_ADDRESS;
/* Assert or de-assert SoCFPGA reset manager reset. */
void socfpga_per_reset(u32 reset, int set)
{
const void *reg;
if (RSTMGR_BANK(reset) == 0)
reg = &reset_manager_base->mpumodrst;
else if (RSTMGR_BANK(reset) == 1)
reg = &reset_manager_base->per0modrst;
else if (RSTMGR_BANK(reset) == 2)
reg = &reset_manager_base->per1modrst;
else if (RSTMGR_BANK(reset) == 3)
reg = &reset_manager_base->brgmodrst;
else /* Invalid reset register, do nothing */
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));
/* disable all except OCP and l4wd0. OCP disable later */
writel(~(l4wd0 | RSTMGR_PER0MODRST_OCP_MASK),
&reset_manager_base->per0modrst);
writel(~l4wd0, &reset_manager_base->per0modrst);
writel(0xffffffff, &reset_manager_base->per1modrst);
}
void socfpga_bridges_reset(int enable)
{
if (enable) {
/* clear idle request to all bridges */
setbits_le32(&system_manager_base->noc_idlereq_clr, ~0);
/* Release bridges from reset state per handoff value */
clrbits_le32(&reset_manager_base->brgmodrst, ~0);
/* Poll until all idleack to 0 */
while (readl(&system_manager_base->noc_idleack))
;
} else {
/* set idle request to all bridges */
writel(~0, &system_manager_base->noc_idlereq_set);
/* Enable the NOC timeout */
writel(1, &system_manager_base->noc_timeout);
/* Poll until all idleack to 1 */
while ((readl(&system_manager_base->noc_idleack) ^
(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
;
/* Poll until all idlestatus to 1 */
while ((readl(&system_manager_base->noc_idlestatus) ^
(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
;
/* Put all bridges (except NOR DDR scheduler) into reset */
setbits_le32(&reset_manager_base->brgmodrst,
~RSTMGR_BRGMODRST_DDRSCH_MASK);
/* Disable NOC timeout */
writel(0, &system_manager_base->noc_timeout);
}
}
/*
* Release peripherals from reset based on handoff
*/
void reset_deassert_peripherals_handoff(void)
{
writel(0, &reset_manager_base->per1modrst);
/* Enable OCP first */
writel(~RSTMGR_PER0MODRST_OCP_MASK, &reset_manager_base->per0modrst);
writel(0, &reset_manager_base->per0modrst);
}
/*
* Return non-zero if the CPU has been warm reset
*/
int cpu_has_been_warmreset(void)
{
return readl(&reset_manager_base->status) &
RSTMGR_L4WD_MPU_WARMRESET_MASK;
}
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