release/src-rt-6.x.4708/linux/linux-2.6.36/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
  33 extern void markeins_led(const char *);
  34
  35 static int bus_frequency;
  36
  37 static 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
  46 static void markeins_machine_halt(void)
  47 {
  48         printk("EMMA2RH Mark-eins halted.\n");
  49         markeins_led("halted.");
  50         while (1) ;
  51 }
  52
  53 static void markeins_machine_power_off(void)
  54 {
  55         markeins_led("poweroff.");
  56         while (1) ;
  57 }
  58
  59 static unsigned long __initdata emma2rh_clock[4] = {
  60         166500000, 187312500, 199800000, 210600000
  61 };
  62
  63 static 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
  74 void __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
  90 static void markeins_board_init(void);
  91 extern void markeins_irq_setup(void);
  92
  93 static void inline __init markeins_sio_setup(void)
  94 {
  95 }
  96
  97 void __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         /* Reboot on panic */
 115         panic_timeout = 180;
 116
 117         markeins_sio_setup();
 118 }
 119
 120 static void __init markeins_board_init(void)
 121 {
 122         u32 val;
 123
 124         val = emma2rh_in32(EMMA2RH_PBRD_INT_EN);        /* open serial interrupts. */
 125         emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
 126         val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL);        /* set serial clocks. */
 127         emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5);  /* 18MHz */
 128         emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
 129
 130         markeins_led("MVL E2RH");
 131 }