// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2012-2014 Broadcom Corporation

#include <linux/clocksource.h>
#include <linux/of_address.h>

#include <asm/mach/arch.h>

#include "kona_l2_cache.h"

#define SECWDOG_OFFSET                  0x00000000
#define SECWDOG_RESERVED_MASK           0xe2000000
#define SECWDOG_WD_LOAD_FLAG_MASK       0x10000000
#define SECWDOG_EN_MASK                 0x08000000
#define SECWDOG_SRSTEN_MASK             0x04000000
#define SECWDOG_CLKS_SHIFT              20
#define SECWDOG_COUNT_SHIFT             0

static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
{
        uint32_t val;
        void __iomem *base;
        struct device_node *np_wdog;

        np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
        if (!np_wdog) {
                pr_emerg("Couldn't find brcm,kona-wdt\n");
                return;
        }
        base = of_iomap(np_wdog, 0);
        of_node_put(np_wdog);
        if (!base) {
                pr_emerg("Couldn't map brcm,kona-wdt\n");
                return;
        }

        /* Enable watchdog with short timeout (244us). */
        val = readl(base + SECWDOG_OFFSET);
        val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
        val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
                (0x15 << SECWDOG_CLKS_SHIFT) |
                (0x8 << SECWDOG_COUNT_SHIFT);
        writel(val, base + SECWDOG_OFFSET);

        /* Wait for reset */
        while (1);
}

static void __init bcm281xx_init(void)
{
        kona_l2_cache_init();
}

static const char * const bcm281xx_dt_compat[] = {
        "brcm,bcm11351",        /* Have to use the first number upstreamed */
        NULL,
};

DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
        .init_machine = bcm281xx_init,
        .restart = bcm281xx_restart,
        .dt_compat = bcm281xx_dt_compat,
MACHINE_END