1 /* 2 * Copyright (C) 2000, 2001, 2002, 2003, 2004 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/spinlock.h> 25 #include <linux/mm.h> 26 #include <linux/bootmem.h> 27 #include <linux/blkdev.h> 28 #include <linux/init.h> 29 #include <linux/kernel.h> 30 #include <linux/screen_info.h> 31 #include <linux/initrd.h> 32 33 #include <asm/irq.h> 34 #include <asm/io.h> 35 #include <asm/bootinfo.h> 36 #include <asm/mipsregs.h> 37 #include <asm/reboot.h> 38 #include <asm/time.h> 39 #include <asm/traps.h> 40 #include <asm/sibyte/sb1250.h> 41 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 42 #include <asm/sibyte/bcm1480_regs.h> 43 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 44 #include <asm/sibyte/sb1250_regs.h> 45 #else 46 #error invalid SiByte board configuration 47 #endif 48 #include <asm/sibyte/sb1250_genbus.h> 49 #include <asm/sibyte/board.h> 50 51 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 52 extern void bcm1480_setup(void); 53 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 54 extern void sb1250_setup(void); 55 #else 56 #error invalid SiByte board configuration 57 #endif 58 59 extern int xicor_probe(void); 60 extern int xicor_set_time(unsigned long); 61 extern unsigned long xicor_get_time(void); 62 63 extern int m41t81_probe(void); 64 extern int m41t81_set_time(unsigned long); 65 extern unsigned long m41t81_get_time(void); 66 67 const char *get_system_type(void) 68 { 69 return "SiByte " SIBYTE_BOARD_NAME; 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 printk("DBE physical address: %010Lx\n", 77 __read_64bit_c0_register($26, 1)); 78 } 79 return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL); 80 } 81 82 enum swarm_rtc_type { 83 RTC_NONE, 84 RTC_XICOR, 85 RTC_M41T81, 86 }; 87 88 enum swarm_rtc_type swarm_rtc_type; 89 90 void read_persistent_clock(struct timespec *ts) 91 { 92 unsigned long sec; 93 94 switch (swarm_rtc_type) { 95 case RTC_XICOR: 96 sec = xicor_get_time(); 97 break; 98 99 case RTC_M41T81: 100 sec = m41t81_get_time(); 101 break; 102 103 case RTC_NONE: 104 default: 105 sec = mktime(2000, 1, 1, 0, 0, 0); 106 break; 107 } 108 ts->tv_sec = sec; 109 ts->tv_nsec = 0; 110 } 111 112 int rtc_mips_set_time(unsigned long sec) 113 { 114 switch (swarm_rtc_type) { 115 case RTC_XICOR: 116 return xicor_set_time(sec); 117 118 case RTC_M41T81: 119 return m41t81_set_time(sec); 120 121 case RTC_NONE: 122 default: 123 return -1; 124 } 125 } 126 127 void __init plat_mem_setup(void) 128 { 129 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 130 bcm1480_setup(); 131 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 132 sb1250_setup(); 133 #else 134 #error invalid SiByte board configuration 135 #endif 136 137 panic_timeout = 5; /* For debug. */ 138 139 board_be_handler = swarm_be_handler; 140 141 if (xicor_probe()) 142 swarm_rtc_type = RTC_XICOR; 143 if (m41t81_probe()) 144 swarm_rtc_type = RTC_M41T81; 145 146 #ifdef CONFIG_VT 147 screen_info = (struct screen_info) { 148 .orig_video_page = 52, 149 .orig_video_mode = 3, 150 .orig_video_cols = 80, 151 .flags = 12, 152 .orig_video_ega_bx = 3, 153 .orig_video_lines = 25, 154 .orig_video_isVGA = 0x22, 155 .orig_video_points = 16, 156 }; 157 /* XXXKW for CFE, get lines/cols from environment */ 158 #endif 159 } 160 161 #ifdef LEDS_PHYS 162 163 #ifdef CONFIG_SIBYTE_CARMEL 164 /* XXXKW need to detect Monterey/LittleSur/etc */ 165 #undef LEDS_PHYS 166 #define LEDS_PHYS MLEDS_PHYS 167 #endif 168 169 void setleds(char *str) 170 { 171 void *reg; 172 int i; 173 174 for (i = 0; i < 4; i++) { 175 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3); 176 177 if (!str[i]) 178 writeb(' ', reg); 179 else 180 writeb(str[i], reg); 181 } 182 } 183 184 #endif /* LEDS_PHYS */ 185