setup.c

Go to the documentation of this file.

/*
 *  Copyright (C) NEC Electronics Corporation 2004-2006
 *
 *  This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
 *
 *  Copyright 2001 MontaVista Software 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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>

#include <asm/time.h>
#include <asm/reboot.h>

#include <asm/emma/emma2rh.h>

#define USE_CPU_COUNTER_TIMER   /* whether we use cpu counter */

extern void markeins_led(const char *);

static int bus_frequency;

static void markeins_machine_restart(char *command)
{
    static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;

    printk("cannot EMMA2RH Mark-eins restart.\n");
    markeins_led("restart.");
    back_to_prom();
}

static void markeins_machine_halt(void)
{
    printk("EMMA2RH Mark-eins halted.\n");
    markeins_led("halted.");
    while (1) ;
}

static void markeins_machine_power_off(void)
{
    markeins_led("poweroff.");
    while (1) ;
}

static unsigned long __initdata emma2rh_clock[4] = {
    166500000, 187312500, 199800000, 210600000
};

static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
{
    u32 reg;

    /* detect from boot strap */
    reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
    reg = (reg >> 4) & 0x3;

    return emma2rh_clock[reg];
}

void __init plat_time_init(void)
{
    u32 reg;
    if (bus_frequency == 0)
        bus_frequency = detect_bus_frequency(0);

    reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
    if ((reg & 0x3) == 0)
        reg = (reg >> 6) & 0x3;
    else {
        reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
        reg = (reg >> 4) & 0x3;
    }
    mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
}

static void markeins_board_init(void);
extern void markeins_irq_setup(void);

static void inline __init markeins_sio_setup(void)
{
}

void __init plat_mem_setup(void)
{
    /* initialize board - we don't trust the loader */
    markeins_board_init();

    set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));

    _machine_restart = markeins_machine_restart;
    _machine_halt = markeins_machine_halt;
    pm_power_off = markeins_machine_power_off;

    /* setup resource limits */
    ioport_resource.start = EMMA2RH_PCI_IO_BASE;
    ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
    iomem_resource.start = EMMA2RH_IO_BASE;
    iomem_resource.end = EMMA2RH_ROM_BASE - 1;

    /* Reboot on panic */
    panic_timeout = 180;

    markeins_sio_setup();
}

static void __init markeins_board_init(void)
{
    u32 val;

    val = emma2rh_in32(EMMA2RH_PBRD_INT_EN);    /* open serial interrupts. */
    emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
    val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL);    /* set serial clocks. */
    emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5);  /* 18MHz */
    emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);

    markeins_led("MVL E2RH");
}