// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * arch/xtensa/platforms/xt2000/setup.c
 *
 * Platform specific functions for the XT2000 board.
 *
 * Authors:     Chris Zankel <chris@zankel.net>
 *              Joe Taylor <joe@tensilica.com>
 *
 * Copyright 2001 - 2004 Tensilica Inc.
 */
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/stringify.h>
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/timer.h>

#include <asm/processor.h>
#include <asm/platform.h>
#include <asm/bootparam.h>
#include <platform/hardware.h>
#include <platform/serial.h>

/* Assumes s points to an 8-chr string.  No checking for NULL. */

static void led_print (int f, char *s)
{
        unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
        int i;
        for (i = f; i < 8; i++)
                if ((*led_addr++ = *s++) == 0)
                    break;
}

static int xt2000_power_off(struct sys_off_data *unused)
{
        led_print (0, "POWEROFF");
        local_irq_disable();
        while (1);
        return NOTIFY_DONE;
}

static int xt2000_restart(struct notifier_block *this,
                          unsigned long event, void *ptr)
{
        /* Flush and reset the mmu, simulate a processor reset, and
         * jump to the reset vector. */
        cpu_reset();

        return NOTIFY_DONE;
}

static struct notifier_block xt2000_restart_block = {
        .notifier_call = xt2000_restart,
};

void __init platform_setup(char** cmdline)
{
        led_print (0, "LINUX   ");
}

/* Heartbeat. Let the LED blink. */

static void xt2000_heartbeat(struct timer_list *unused);

static DEFINE_TIMER(heartbeat_timer, xt2000_heartbeat);

static void xt2000_heartbeat(struct timer_list *unused)
{
        static int i;

        led_print(7, i ? "." : " ");
        i ^= 1;
        mod_timer(&heartbeat_timer, jiffies + HZ / 2);
}

//#define RS_TABLE_SIZE 2

#define _SERIAL_PORT(_base,_irq)                                        \
{                                                                       \
        .mapbase        = (_base),                                      \
        .membase        = (void*)(_base),                               \
        .irq            = (_irq),                                       \
        .uartclk        = DUART16552_XTAL_FREQ,                         \
        .iotype         = UPIO_MEM,                                     \
        .flags          = UPF_BOOT_AUTOCONF,                            \
        .regshift       = 2,                                            \
}

static struct plat_serial8250_port xt2000_serial_data[] = {
#if XCHAL_HAVE_BE
        _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
        _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
#else
        _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
        _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
#endif
        { }
};

static struct platform_device xt2000_serial8250_device = {
        .name           = "serial8250",
        .id             = PLAT8250_DEV_PLATFORM,
        .dev            = {
            .platform_data = xt2000_serial_data,
        },
};

static struct resource xt2000_sonic_res[] = {
        {
                .start = SONIC83934_ADDR,
                .end   = SONIC83934_ADDR + 0xff,
                .flags = IORESOURCE_MEM,
        },
        {
                .start = SONIC83934_INTNUM,
                .end = SONIC83934_INTNUM,
                .flags = IORESOURCE_IRQ,
        },
};

static struct platform_device xt2000_sonic_device = {
        .name           = "xtsonic",
        .num_resources  = ARRAY_SIZE(xt2000_sonic_res),
        .resource               = xt2000_sonic_res,
};

static int __init xt2000_setup_devinit(void)
{
        platform_device_register(&xt2000_serial8250_device);
        platform_device_register(&xt2000_sonic_device);
        mod_timer(&heartbeat_timer, jiffies + HZ / 2);
        register_restart_handler(&xt2000_restart_block);
        register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
                                 SYS_OFF_PRIO_DEFAULT,
                                 xt2000_power_off, NULL);
        return 0;
}

device_initcall(xt2000_setup_devinit);