// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2010-2011 Calxeda, Inc.
 */
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clocksource.h>
#include <linux/dma-map-ops.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/irqchip.h>
#include <linux/pl320-ipc.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/reboot.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/psci.h>

#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "core.h"
#include "sysregs.h"

void __iomem *sregs_base;
void __iomem *scu_base_addr;

static void __init highbank_scu_map_io(void)
{
        unsigned long base;

        /* Get SCU base */
        asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));

        scu_base_addr = ioremap(base, SZ_4K);
}


static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
{
        if (reg == L2X0_CTRL)
                highbank_smc1(0x102, val);
        else
                WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
                          reg);
}

static void __init highbank_init_irq(void)
{
        irqchip_init();

        if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
                highbank_scu_map_io();
}

static void highbank_power_off(void)
{
        highbank_set_pwr_shutdown();

        while (1)
                cpu_do_idle();
}

static int highbank_platform_notifier(struct notifier_block *nb,
                                  unsigned long event, void *__dev)
{
        struct resource *res;
        int reg = -1;
        u32 val;
        struct device *dev = __dev;

        if (event != BUS_NOTIFY_ADD_DEVICE)
                return NOTIFY_DONE;

        if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
                reg = 0xc;
        else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
                reg = 0x18;
        else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
                reg = 0x20;
        else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
                res = platform_get_resource(to_platform_device(dev),
                                            IORESOURCE_MEM, 0);
                if (res) {
                        if (res->start == 0xfff50000)
                                reg = 0;
                        else if (res->start == 0xfff51000)
                                reg = 4;
                }
        }

        if (reg < 0)
                return NOTIFY_DONE;

        if (of_property_read_bool(dev->of_node, "dma-coherent")) {
                val = readl(sregs_base + reg);
                writel(val | 0xff01, sregs_base + reg);
                dev->dma_coherent = true;
        }

        return NOTIFY_OK;
}

static struct notifier_block highbank_amba_nb = {
        .notifier_call = highbank_platform_notifier,
};

static struct notifier_block highbank_platform_nb = {
        .notifier_call = highbank_platform_notifier,
};

static struct platform_device highbank_cpuidle_device = {
        .name = "cpuidle-calxeda",
};

static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
{
        u32 key = *(u32 *)data;

        if (event != 0x1000)
                return 0;

        if (key == KEY_POWER)
                orderly_poweroff(false);
        else if (key == 0xffff)
                ctrl_alt_del();

        return 0;
}
static struct notifier_block hb_keys_nb = {
        .notifier_call = hb_keys_notifier,
};

static void __init highbank_init(void)
{
        struct device_node *np;

        /* Map system registers */
        np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
        sregs_base = of_iomap(np, 0);
        WARN_ON(!sregs_base);

        register_platform_power_off(highbank_power_off);
        highbank_pm_init();

        bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
        bus_register_notifier(&amba_bustype, &highbank_amba_nb);

        pl320_ipc_register_notifier(&hb_keys_nb);

        if (psci_ops.cpu_suspend)
                platform_device_register(&highbank_cpuidle_device);
}

static const char *const highbank_match[] __initconst = {
        "calxeda,highbank",
        "calxeda,ecx-2000",
        NULL,
};

DT_MACHINE_START(HIGHBANK, "Highbank")
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
        .dma_zone_size  = (4ULL * SZ_1G),
#endif
        .l2c_aux_val    = 0,
        .l2c_aux_mask   = ~0,
        .l2c_write_sec  = highbank_l2c310_write_sec,
        .init_irq       = highbank_init_irq,
        .init_machine   = highbank_init,
        .dt_compat      = highbank_match,
        .restart        = highbank_restart,
MACHINE_END