1 /* 2 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation 3 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 2 8 * of the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 */ 19 20 /* 21 * Setup code for the SWARM board 22 */ 23 24 #include <linux/config.h> 25 #include <linux/spinlock.h> 26 #include <linux/mm.h> 27 #include <linux/bootmem.h> 28 #include <linux/blkdev.h> 29 #include <linux/init.h> 30 #include <linux/kernel.h> 31 #include <linux/tty.h> 32 #include <linux/initrd.h> 33 34 #include <asm/irq.h> 35 #include <asm/io.h> 36 #include <asm/bootinfo.h> 37 #include <asm/mipsregs.h> 38 #include <asm/reboot.h> 39 #include <asm/time.h> 40 #include <asm/traps.h> 41 #include <asm/sibyte/sb1250.h> 42 #include <asm/sibyte/sb1250_regs.h> 43 #include <asm/sibyte/sb1250_genbus.h> 44 #include <asm/sibyte/board.h> 45 46 extern void sb1250_setup(void); 47 48 extern int xicor_probe(void); 49 extern int xicor_set_time(unsigned long); 50 extern unsigned long xicor_get_time(void); 51 52 extern int m41t81_probe(void); 53 extern int m41t81_set_time(unsigned long); 54 extern unsigned long m41t81_get_time(void); 55 56 const char *get_system_type(void) 57 { 58 return "SiByte " SIBYTE_BOARD_NAME; 59 } 60 61 void __init swarm_timer_setup(struct irqaction *irq) 62 { 63 /* 64 * we don't set up irqaction, because we will deliver timer 65 * interrupts through low-level (direct) meachanism. 66 */ 67 68 /* We only need to setup the generic timer */ 69 sb1250_time_init(); 70 } 71 72 int swarm_be_handler(struct pt_regs *regs, int is_fixup) 73 { 74 if (!is_fixup && (regs->cp0_cause & 4)) { 75 /* Data bus error - print PA */ 76 #ifdef CONFIG_64BIT 77 printk("DBE physical address: %010lx\n", 78 __read_64bit_c0_register($26, 1)); 79 #else 80 printk("DBE physical address: %010llx\n", 81 __read_64bit_c0_split($26, 1)); 82 #endif 83 } 84 return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL); 85 } 86 87 static int __init swarm_setup(void) 88 { 89 sb1250_setup(); 90 91 panic_timeout = 5; /* For debug. */ 92 93 board_timer_setup = swarm_timer_setup; 94 board_be_handler = swarm_be_handler; 95 96 if (xicor_probe()) { 97 printk("swarm setup: Xicor 1241 RTC detected.\n"); 98 rtc_get_time = xicor_get_time; 99 rtc_set_time = xicor_set_time; 100 } 101 102 if (m41t81_probe()) { 103 printk("swarm setup: M41T81 RTC detected.\n"); 104 rtc_get_time = m41t81_get_time; 105 rtc_set_time = m41t81_set_time; 106 } 107 108 printk("This kernel optimized for " 109 #ifdef CONFIG_SIMULATION 110 "simulation" 111 #else 112 "board" 113 #endif 114 " runs " 115 #ifdef CONFIG_SIBYTE_CFE 116 "with" 117 #else 118 "without" 119 #endif 120 " CFE\n"); 121 122 #ifdef CONFIG_VT 123 screen_info = (struct screen_info) { 124 0, 0, /* orig-x, orig-y */ 125 0, /* unused */ 126 52, /* orig_video_page */ 127 3, /* orig_video_mode */ 128 80, /* orig_video_cols */ 129 4626, 3, 9, /* unused, ega_bx, unused */ 130 25, /* orig_video_lines */ 131 0x22, /* orig_video_isVGA */ 132 16 /* orig_video_points */ 133 }; 134 /* XXXKW for CFE, get lines/cols from environment */ 135 #endif 136 137 return 0; 138 } 139 140 early_initcall(swarm_setup); 141 142 #ifdef LEDS_PHYS 143 144 #ifdef CONFIG_SIBYTE_CARMEL 145 /* XXXKW need to detect Monterey/LittleSur/etc */ 146 #undef LEDS_PHYS 147 #define LEDS_PHYS MLEDS_PHYS 148 #endif 149 150 #define setled(index, c) \ 151 ((unsigned char *)(IOADDR(LEDS_PHYS)+0x20))[(3-(index))<<3] = (c) 152 void setleds(char *str) 153 { 154 int i; 155 for (i = 0; i < 4; i++) { 156 if (!str[i]) { 157 setled(i, ' '); 158 } else { 159 setled(i, str[i]); 160 } 161 } 162 } 163 #endif 164