arch/mips/emma/markeins/setup.c

   1 /*
   2  *  arch/mips/emma2rh/markeins/setup.c
   3  *      This file is setup for EMMA2RH Mark-eins.
   4  *
   5  *  Copyright (C) NEC Electronics Corporation 2004-2006
   6  *
   7  *  This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
   8  *
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25 #include <linux/init.h>
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28
  29 #include <asm/time.h>
  30 #include <asm/reboot.h>
  31
  32 #include <asm/emma/emma2rh.h>
  33
  34 #define USE_CPU_COUNTER_TIMER   /* whether we use cpu counter */
  35
  36 extern void markeins_led(const char *);
  37
  38 static int bus_frequency = 0;
  39
  40 static void markeins_machine_restart(char *command)
  41 {
  42         static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
  43
  44         printk("cannot EMMA2RH Mark-eins restart.\n");
  45         markeins_led("restart.");
  46         back_to_prom();
  47 }
  48
  49 static void markeins_machine_halt(void)
  50 {
  51         printk("EMMA2RH Mark-eins halted.\n");
  52         markeins_led("halted.");
  53         while (1) ;
  54 }
  55
  56 static void markeins_machine_power_off(void)
  57 {
  58         printk("EMMA2RH Mark-eins halted. Please turn off the power.\n");
  59         markeins_led("poweroff.");
  60         while (1) ;
  61 }
  62
  63 static unsigned long __initdata emma2rh_clock[4] = {
  64         166500000, 187312500, 199800000, 210600000
  65 };
  66
  67 static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
  68 {
  69         u32 reg;
  70
  71         /* detect from boot strap */
  72         reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  73         reg = (reg >> 4) & 0x3;
  74
  75         return emma2rh_clock[reg];
  76 }
  77
  78 void __init plat_time_init(void)
  79 {
  80         u32 reg;
  81         if (bus_frequency == 0)
  82                 bus_frequency = detect_bus_frequency(0);
  83
  84         reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  85         if ((reg & 0x3) == 0)
  86                 reg = (reg >> 6) & 0x3;
  87         else {
  88                 reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
  89                 reg = (reg >> 4) & 0x3;
  90         }
  91         mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
  92 }
  93
  94 static void markeins_board_init(void);
  95 extern void markeins_irq_setup(void);
  96
  97 static void inline __init markeins_sio_setup(void)
  98 {
  99 }
 100
 101 void __init plat_mem_setup(void)
 102 {
 103         /* initialize board - we don't trust the loader */
 104         markeins_board_init();
 105
 106         set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
 107
 108         _machine_restart = markeins_machine_restart;
 109         _machine_halt = markeins_machine_halt;
 110         pm_power_off = markeins_machine_power_off;
 111
 112         /* setup resource limits */
 113         ioport_resource.start = EMMA2RH_PCI_IO_BASE;
 114         ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
 115         iomem_resource.start = EMMA2RH_IO_BASE;
 116         iomem_resource.end = EMMA2RH_ROM_BASE - 1;
 117
 118         /* Reboot on panic */
 119         panic_timeout = 180;
 120
 121         markeins_sio_setup();
 122 }
 123
 124 static void __init markeins_board_init(void)
 125 {
 126         u32 val;
 127
 128         val = emma2rh_in32(EMMA2RH_PBRD_INT_EN);        /* open serial interrupts. */
 129         emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
 130         val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL);        /* set serial clocks. */
 131         emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5);  /* 18MHz */
 132         emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
 133
 134         markeins_led("MVL E2RH");
 135 }