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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/sbi_error.h>
#include <sbi/sbi_scratch.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/irqchip/fdt_irqchip.h>
extern struct fdt_irqchip fdt_irqchip_imsic;
extern struct fdt_irqchip fdt_irqchip_plic;
static struct fdt_irqchip *irqchip_drivers[] = {
&fdt_irqchip_imsic,
&fdt_irqchip_plic
};
#define FDT_IRQCHIP_MAX_DRIVERS 8
static struct fdt_irqchip *current_drivers[FDT_IRQCHIP_MAX_DRIVERS] = {0};
static int current_drivers_count;
void fdt_irqchip_exit(void)
{
int i;
for (i = 0; i < current_drivers_count; i++) {
if (!current_drivers[i] || !current_drivers[i]->exit)
continue;
current_drivers[i]->exit();
}
}
static int fdt_irqchip_warm_init(void)
{
int i, rc;
for (i = 0; i < current_drivers_count; i++) {
if (!current_drivers[i] || !current_drivers[i]->warm_init)
continue;
rc = current_drivers[i]->warm_init();
if (rc)
return rc;
}
return 0;
}
static int fdt_irqchip_cold_init(void)
{
bool drv_added;
int pos, noff, rc;
struct fdt_irqchip *drv;
const struct fdt_match *match;
void *fdt = fdt_get_address();
for (pos = 0; pos < array_size(irqchip_drivers); pos++) {
drv = irqchip_drivers[pos];
noff = -1;
drv_added = false;
while ((noff = fdt_find_match(fdt, noff,
drv->match_table, &match)) >= 0) {
if (drv->cold_init) {
rc = drv->cold_init(fdt, noff, match);
if (rc == SBI_ENODEV)
continue;
if (rc)
return rc;
}
if (drv_added)
continue;
current_drivers[current_drivers_count++] = drv;
drv_added = true;
}
if (FDT_IRQCHIP_MAX_DRIVERS <= current_drivers_count)
break;
}
return 0;
}
int fdt_irqchip_init(bool cold_boot)
{
int rc;
if (cold_boot) {
rc = fdt_irqchip_cold_init();
if (rc)
return rc;
}
return fdt_irqchip_warm_init();
}
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