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 52extern void markeins_led(const char *); 53 54static int bus_frequency = 0; 55 56static 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 65static void markeins_machine_halt(void) 66{ 67 printk("EMMA2RH Mark-eins halted.\n"); 68 markeins_led("halted."); 69 while (1) ; 70} 71 72static 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 79static unsigned long clock[4] = { 166500000, 187312500, 199800000, 210600000 }; 80 81static 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 91static 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 107void __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 113static void markeins_board_init(void); 114extern void markeins_irq_setup(void); 115 116static void inline __init markeins_sio_setup(void) 117{ 118} 119 120void __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 145static 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} 157