arch/mips/emma2rh/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 #include <linux/initrd.h>
  29 #include <linux/irq.h>
  30 #include <linux/ide.h>
  31 #include <linux/ioport.h>
  32 #include <linux/param.h>        /* for HZ */
  33 #include <linux/root_dev.h>
  34 #include <linux/serial.h>
  35 #include <linux/serial_core.h>
  36
  37 #include <asm/cpu.h>
  38 #include <asm/bootinfo.h>
  39 #include <asm/addrspace.h>
  40 #include <asm/time.h>
  41 #include <asm/bcache.h>
  42 #include <asm/irq.h>
  43 #include <asm/reboot.h>
  44 #include <asm/gdb-stub.h>
  45 #include <asm/traps.h>
  46 #include <asm/debug.h>
  47
  48 #include <asm/emma2rh/emma2rh.h>
  49
  50 #define USE_CPU_COUNTER_TIMER   /* whether we use cpu counter */
  51
  52 extern void markeins_led(const char *);
  53
  54 static int bus_frequency = 0;
  55
  56 static void markeins_machine_restart(char *command)
  57 {
  58         static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
  59
  60         printk("cannot EMMA2RH Mark-eins restart.\n");
  61         markeins_led("restart.");
  62         back_to_prom();
  63 }
  64
  65 static void markeins_machine_halt(void)
  66 {
  67         printk("EMMA2RH Mark-eins halted.\n");
  68         markeins_led("halted.");
  69         while (1) ;
  70 }
  71
  72 static void markeins_machine_power_off(void)
  73 {
  74         printk("EMMA2RH Mark-eins halted. Please turn off the power.\n");
  75         markeins_led("poweroff.");
  76         while (1) ;
  77 }
  78
  79 static unsigned long clock[4] = { 166500000, 187312500, 199800000, 210600000 };
  80
  81 static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
  82 {
  83         u32 reg;
  84
  85         /* detect from boot strap */
  86         reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  87         reg = (reg >> 4) & 0x3;
  88         return clock[reg];
  89 }
  90
  91 static void __init emma2rh_time_init(void)
  92 {
  93         u32 reg;
  94         if (bus_frequency == 0)
  95                 bus_frequency = detect_bus_frequency(0);
  96
  97         reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
  98         if ((reg & 0x3) == 0)
  99                 reg = (reg >> 6) & 0x3;
 100         else {
 101                 reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
 102                 reg = (reg >> 4) & 0x3;
 103         }
 104         mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
 105 }
 106
 107 void __init plat_timer_setup(struct irqaction *irq)
 108 {
 109         /* we are using the cpu counter for timer interrupts */
 110         setup_irq(CPU_IRQ_BASE + 7, irq);
 111 }
 112
 113 static void markeins_board_init(void);
 114 extern void markeins_irq_setup(void);
 115
 116 static void inline __init markeins_sio_setup(void)
 117 {
 118 }
 119
 120 void __init plat_mem_setup(void)
 121 {
 122         /* initialize board - we don't trust the loader */
 123         markeins_board_init();
 124
 125         set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
 126
 127         board_time_init = emma2rh_time_init;
 128
 129         _machine_restart = markeins_machine_restart;
 130         _machine_halt = markeins_machine_halt;
 131         pm_power_off = markeins_machine_power_off;
 132
 133         /* setup resource limits */
 134         ioport_resource.start = EMMA2RH_PCI_IO_BASE;
 135         ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
 136         iomem_resource.start = EMMA2RH_IO_BASE;
 137         iomem_resource.end = EMMA2RH_ROM_BASE - 1;
 138
 139         /* Reboot on panic */
 140         panic_timeout = 180;
 141
 142         markeins_sio_setup();
 143 }
 144
 145 static void __init markeins_board_init(void)
 146 {
 147         u32 val;
 148
 149         val = emma2rh_in32(EMMA2RH_PBRD_INT_EN);        /* open serial interrupts. */
 150         emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
 151         val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL);        /* set serial clocks. */
 152         emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5);  /* 18MHz */
 153         emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
 154
 155         markeins_led("MVL E2RH");
 156 }