LXR linux/arch/mips/emma/markeins/setup.c

   1/*
   2 *  Copyright (C) NEC Electronics Corporation 2004-2006
   3 *
   4 *  This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
   5 *
   6 *      Copyright 2001 MontaVista Software Inc.
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; either version 2 of the License, or
  11 *  (at your option) any later version.
  12 *
  13 *  This program is distributed in the hope that it will be useful,
  14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *  GNU General Public License for more details.
  17 *
  18 *  You should have received a copy of the GNU General Public License
  19 *  along with this program; if not, write to the Free Software
  20 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22#include <linux/init.h>
  23#include <linux/kernel.h>
  24#include <linux/types.h>
  25
  26#include <asm/time.h>
  27#include <asm/reboot.h>
  28
  29#include <asm/emma/emma2rh.h>
  30
  31#define USE_CPU_COUNTER_TIMER   /* whether we use cpu counter */
  32
  33extern void markeins_led(const char *);
  34
  35static int bus_frequency;
  36
  37static void markeins_machine_restart(char *command)
  38{
  39        static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
  40
  41        printk("cannot EMMA2RH Mark-eins restart.\n");
  42        markeins_led("restart.");
  43        back_to_prom();
  44}
  45
  46static void markeins_machine_halt(void)
  47{
  48        printk("EMMA2RH Mark-eins halted.\n");
  49        markeins_led("halted.");
  50        while (1) ;
  51}
  52
  53static void markeins_machine_power_off(void)
  54{
  55        markeins_led("poweroff.");
  56        while (1) ;
  57}
  58
  59static unsigned long __initdata emma2rh_clock[4] = {
  60        166500000, 187312500, 199800000, 210600000
  61};
  62
  63static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
  64{
  65        u32 reg;
  66
  67        /* detect from boot strap */
  68        reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  69        reg = (reg >> 4) & 0x3;
  70
  71        return emma2rh_clock[reg];
  72}
  73
  74void __init plat_time_init(void)
  75{
  76        u32 reg;
  77        if (bus_frequency == 0)
  78                bus_frequency = detect_bus_frequency(0);
  79
  80        reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  81        if ((reg & 0x3) == 0)
  82                reg = (reg >> 6) & 0x3;
  83        else {
  84                reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
  85                reg = (reg >> 4) & 0x3;
  86        }
  87        mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
  88}
  89
  90static void markeins_board_init(void);
  91extern void markeins_irq_setup(void);
  92
  93static inline void __init markeins_sio_setup(void)
  94{
  95}
  96
  97void __init plat_mem_setup(void)
  98{
  99        /* initialize board - we don't trust the loader */
 100        markeins_board_init();
 101
 102        set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
 103
 104        _machine_restart = markeins_machine_restart;
 105        _machine_halt = markeins_machine_halt;
 106        pm_power_off = markeins_machine_power_off;
 107
 108        /* setup resource limits */
 109        ioport_resource.start = EMMA2RH_PCI_IO_BASE;
 110        ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
 111        iomem_resource.start = EMMA2RH_IO_BASE;
 112        iomem_resource.end = EMMA2RH_ROM_BASE - 1;
 113
 114        markeins_sio_setup();
 115}
 116
 117static void __init markeins_board_init(void)
 118{
 119        u32 val;
 120
 121        val = emma2rh_in32(EMMA2RH_PBRD_INT_EN);        /* open serial interrupts. */
 122        emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
 123        val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL);        /* set serial clocks. */
 124        emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5);  /* 18MHz */
 125        emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
 126
 127        markeins_led("MVL E2RH");
 128}
 129