/*
 * 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.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#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 <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;
}

void platform_halt(void)
{
        led_print (0, "  HALT  ");
        local_irq_disable();
        while (1);
}

void platform_power_off(void)
{
        led_print (0, "POWEROFF");
        local_irq_disable();
        while (1);
}

void platform_restart(void)
{
        /* Flush and reset the mmu, simulate a processor reset, and
         * jump to the reset vector. */

        __asm__ __volatile__ ("movi     a2, 15\n\t"
                              "wsr      a2, icountlevel\n\t"
                              "movi     a2, 0\n\t"
                              "wsr      a2, icount\n\t"
#if XCHAL_NUM_IBREAK > 0
                              "wsr      a2, ibreakenable\n\t"
#endif
                              "wsr      a2, lcount\n\t"
                              "movi     a2, 0x1f\n\t"
                              "wsr      a2, ps\n\t"
                              "isync\n\t"
                              "jx       %0\n\t"
                              :
                              : "a" (XCHAL_RESET_VECTOR_VADDR)
                              : "a2"
                              );

        /* control never gets here */
}

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

/* early initialization */

extern sysmem_info_t __initdata sysmem;

void platform_init(bp_tag_t* first)
{
        /* Set default memory block if not provided by the bootloader. */

        if (sysmem.nr_banks == 0) {
                sysmem.nr_banks = 1;
                sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
                sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
                                     + PLATFORM_DEFAULT_MEM_SIZE;
        }
}

/* Heartbeat. Let the LED blink. */

void platform_heartbeat(void)
{
        static int i=0, t = 0;

        if (--t < 0)
        {
                t = 59;
                led_print(7, i ? ".": " ");
                i ^= 1;
        }
}

//#define RS_TABLE_SIZE 2
//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)

#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);

        return 0;
}

device_initcall(xt2000_setup_devinit);