setup.c revision 982f6ffeeed5ef6104cfd72e517ff9e7a9270fda
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 printk("EMMA2RH Mark-eins halted. Please turn off the power.\n"); 56 markeins_led("poweroff."); 57 while (1) ; 58} 59 60static unsigned long __initdata emma2rh_clock[4] = { 61 166500000, 187312500, 199800000, 210600000 62}; 63 64static unsigned int __init detect_bus_frequency(unsigned long rtc_base) 65{ 66 u32 reg; 67 68 /* detect from boot strap */ 69 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0); 70 reg = (reg >> 4) & 0x3; 71 72 return emma2rh_clock[reg]; 73} 74 75void __init plat_time_init(void) 76{ 77 u32 reg; 78 if (bus_frequency == 0) 79 bus_frequency = detect_bus_frequency(0); 80 81 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0); 82 if ((reg & 0x3) == 0) 83 reg = (reg >> 6) & 0x3; 84 else { 85 reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL); 86 reg = (reg >> 4) & 0x3; 87 } 88 mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2; 89} 90 91static void markeins_board_init(void); 92extern void markeins_irq_setup(void); 93 94static void inline __init markeins_sio_setup(void) 95{ 96} 97 98void __init plat_mem_setup(void) 99{ 100 /* initialize board - we don't trust the loader */ 101 markeins_board_init(); 102 103 set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE)); 104 105 _machine_restart = markeins_machine_restart; 106 _machine_halt = markeins_machine_halt; 107 pm_power_off = markeins_machine_power_off; 108 109 /* setup resource limits */ 110 ioport_resource.start = EMMA2RH_PCI_IO_BASE; 111 ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1; 112 iomem_resource.start = EMMA2RH_IO_BASE; 113 iomem_resource.end = EMMA2RH_ROM_BASE - 1; 114 115 /* Reboot on panic */ 116 panic_timeout = 180; 117 118 markeins_sio_setup(); 119} 120 121static void __init markeins_board_init(void) 122{ 123 u32 val; 124 125 val = emma2rh_in32(EMMA2RH_PBRD_INT_EN); /* open serial interrupts. */ 126 emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa); 127 val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL); /* set serial clocks. */ 128 emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5); /* 18MHz */ 129 emma2rh_out32(EMMA2RH_PCI_CONTROL, 0); 130 131 markeins_led("MVL E2RH"); 132} 133