1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation 4 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) 5 */ 6 7 /* 8 * Setup code for the SWARM board 9 */ 10 11 #include <linux/spinlock.h> 12 #include <linux/mm.h> 13 #include <linux/memblock.h> 14 #include <linux/init.h> 15 #include <linux/kernel.h> 16 #include <linux/screen_info.h> 17 #include <linux/initrd.h> 18 19 #include <asm/irq.h> 20 #include <asm/io.h> 21 #include <asm/bootinfo.h> 22 #include <asm/mipsregs.h> 23 #include <asm/reboot.h> 24 #include <asm/time.h> 25 #include <asm/traps.h> 26 #include <asm/sibyte/sb1250.h> 27 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 28 #include <asm/sibyte/bcm1480_regs.h> 29 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 30 #include <asm/sibyte/sb1250_regs.h> 31 #else 32 #error invalid SiByte board configuration 33 #endif 34 #include <asm/sibyte/sb1250_genbus.h> 35 #include <asm/sibyte/board.h> 36 37 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 38 extern void bcm1480_setup(void); 39 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 40 extern void sb1250_setup(void); 41 #else 42 #error invalid SiByte board configuration 43 #endif 44 45 extern int xicor_probe(void); 46 extern int xicor_set_time(time64_t); 47 extern time64_t xicor_get_time(void); 48 49 extern int m41t81_probe(void); 50 extern int m41t81_set_time(time64_t); 51 extern time64_t m41t81_get_time(void); 52 53 const char *get_system_type(void) 54 { 55 return "SiByte " SIBYTE_BOARD_NAME; 56 } 57 58 int swarm_be_handler(struct pt_regs *regs, int is_fixup) 59 { 60 if (!is_fixup && (regs->cp0_cause & 4)) { 61 /* Data bus error - print PA */ 62 printk("DBE physical address: %010Lx\n", 63 __read_64bit_c0_register($26, 1)); 64 } 65 return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL; 66 } 67 68 enum swarm_rtc_type { 69 RTC_NONE, 70 RTC_XICOR, 71 RTC_M41T81, 72 }; 73 74 enum swarm_rtc_type swarm_rtc_type; 75 76 void read_persistent_clock64(struct timespec64 *ts) 77 { 78 time64_t sec; 79 80 switch (swarm_rtc_type) { 81 case RTC_XICOR: 82 sec = xicor_get_time(); 83 break; 84 85 case RTC_M41T81: 86 sec = m41t81_get_time(); 87 break; 88 89 case RTC_NONE: 90 default: 91 sec = mktime64(2000, 1, 1, 0, 0, 0); 92 break; 93 } 94 ts->tv_sec = sec; 95 ts->tv_nsec = 0; 96 } 97 98 int update_persistent_clock64(struct timespec64 now) 99 { 100 time64_t sec = now.tv_sec; 101 102 switch (swarm_rtc_type) { 103 case RTC_XICOR: 104 return xicor_set_time(sec); 105 106 case RTC_M41T81: 107 return m41t81_set_time(sec); 108 109 case RTC_NONE: 110 default: 111 return -1; 112 } 113 } 114 115 void __init plat_mem_setup(void) 116 { 117 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 118 bcm1480_setup(); 119 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 120 sb1250_setup(); 121 #else 122 #error invalid SiByte board configuration 123 #endif 124 125 mips_set_be_handler(swarm_be_handler); 126 127 if (xicor_probe()) 128 swarm_rtc_type = RTC_XICOR; 129 if (m41t81_probe()) 130 swarm_rtc_type = RTC_M41T81; 131 132 #ifdef CONFIG_VT 133 screen_info = (struct screen_info) { 134 .orig_video_page = 52, 135 .orig_video_mode = 3, 136 .orig_video_cols = 80, 137 .flags = 12, 138 .orig_video_ega_bx = 3, 139 .orig_video_lines = 25, 140 .orig_video_isVGA = 0x22, 141 .orig_video_points = 16, 142 }; 143 /* XXXKW for CFE, get lines/cols from environment */ 144 #endif 145 } 146 147 #ifdef LEDS_PHYS 148 149 #ifdef CONFIG_SIBYTE_CARMEL 150 /* XXXKW need to detect Monterey/LittleSur/etc */ 151 #undef LEDS_PHYS 152 #define LEDS_PHYS MLEDS_PHYS 153 #endif 154 155 void setleds(char *str) 156 { 157 void *reg; 158 int i; 159 160 for (i = 0; i < 4; i++) { 161 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3); 162 163 if (!str[i]) 164 writeb(' ', reg); 165 else 166 writeb(str[i], reg); 167 } 168 } 169 170 #endif /* LEDS_PHYS */ 171