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 void __init plat_time_init(void) 73 { 74 #if defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 75 /* Setup HPT */ 76 sb1250_hpt_setup(); 77 #endif 78 } 79 80 void __init plat_timer_setup(struct irqaction *irq) 81 { 82 /* 83 * we don't set up irqaction, because we will deliver timer 84 * interrupts through low-level (direct) meachanism. 85 */ 86 87 /* We only need to setup the generic timer */ 88 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 89 bcm1480_time_init(); 90 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 91 sb1250_time_init(); 92 #else 93 #error invalid SiByte board configuration 94 #endif 95 } 96 97 int swarm_be_handler(struct pt_regs *regs, int is_fixup) 98 { 99 if (!is_fixup && (regs->cp0_cause & 4)) { 100 /* Data bus error - print PA */ 101 printk("DBE physical address: %010Lx\n", 102 __read_64bit_c0_register($26, 1)); 103 } 104 return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL); 105 } 106 107 enum swarm_rtc_type { 108 RTC_NONE, 109 RTC_XICOR, 110 RTC_M4LT81 111 }; 112 113 enum swarm_rtc_type swarm_rtc_type; 114 115 unsigned long read_persistent_clock(void) 116 { 117 switch (swarm_rtc_type) { 118 case RTC_XICOR: 119 return xicor_get_time(); 120 121 case RTC_M4LT81: 122 return m41t81_get_time(); 123 124 case RTC_NONE: 125 default: 126 return mktime(2000, 1, 1, 0, 0, 0); 127 } 128 } 129 130 int rtc_mips_set_time(unsigned long sec) 131 { 132 switch (swarm_rtc_type) { 133 case RTC_XICOR: 134 return xicor_set_time(sec); 135 136 case RTC_M4LT81: 137 return m41t81_set_time(sec); 138 139 case RTC_NONE: 140 default: 141 return -1; 142 } 143 } 144 145 void __init plat_mem_setup(void) 146 { 147 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 148 bcm1480_setup(); 149 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 150 sb1250_setup(); 151 #else 152 #error invalid SiByte board configuration 153 #endif 154 155 panic_timeout = 5; /* For debug. */ 156 157 board_be_handler = swarm_be_handler; 158 159 if (xicor_probe()) 160 swarm_rtc_type = RTC_XICOR; 161 if (m41t81_probe()) 162 swarm_rtc_type = RTC_M4LT81; 163 164 printk("This kernel optimized for " 165 #ifdef CONFIG_SIMULATION 166 "simulation" 167 #else 168 "board" 169 #endif 170 " runs " 171 #ifdef CONFIG_SIBYTE_CFE 172 "with" 173 #else 174 "without" 175 #endif 176 " CFE\n"); 177 178 #ifdef CONFIG_VT 179 screen_info = (struct screen_info) { 180 0, 0, /* orig-x, orig-y */ 181 0, /* unused */ 182 52, /* orig_video_page */ 183 3, /* orig_video_mode */ 184 80, /* orig_video_cols */ 185 4626, 3, 9, /* unused, ega_bx, unused */ 186 25, /* orig_video_lines */ 187 0x22, /* orig_video_isVGA */ 188 16 /* orig_video_points */ 189 }; 190 /* XXXKW for CFE, get lines/cols from environment */ 191 #endif 192 } 193 194 #ifdef LEDS_PHYS 195 196 #ifdef CONFIG_SIBYTE_CARMEL 197 /* XXXKW need to detect Monterey/LittleSur/etc */ 198 #undef LEDS_PHYS 199 #define LEDS_PHYS MLEDS_PHYS 200 #endif 201 202 void setleds(char *str) 203 { 204 void *reg; 205 int i; 206 207 for (i = 0; i < 4; i++) { 208 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3); 209 210 if (!str[i]) 211 writeb(' ', reg); 212 else 213 writeb(str[i], reg); 214 } 215 } 216 217 #endif /* LEDS_PHYS */ 218