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/blkdev.h> 15 #include <linux/init.h> 16 #include <linux/kernel.h> 17 #include <linux/screen_info.h> 18 #include <linux/initrd.h> 19 20 #include <asm/irq.h> 21 #include <asm/io.h> 22 #include <asm/bootinfo.h> 23 #include <asm/mipsregs.h> 24 #include <asm/reboot.h> 25 #include <asm/time.h> 26 #include <asm/traps.h> 27 #include <asm/sibyte/sb1250.h> 28 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 29 #include <asm/sibyte/bcm1480_regs.h> 30 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 31 #include <asm/sibyte/sb1250_regs.h> 32 #else 33 #error invalid SiByte board configuration 34 #endif 35 #include <asm/sibyte/sb1250_genbus.h> 36 #include <asm/sibyte/board.h> 37 38 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 39 extern void bcm1480_setup(void); 40 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 41 extern void sb1250_setup(void); 42 #else 43 #error invalid SiByte board configuration 44 #endif 45 46 extern int xicor_probe(void); 47 extern int xicor_set_time(time64_t); 48 extern time64_t xicor_get_time(void); 49 50 extern int m41t81_probe(void); 51 extern int m41t81_set_time(time64_t); 52 extern time64_t m41t81_get_time(void); 53 54 const char *get_system_type(void) 55 { 56 return "SiByte " SIBYTE_BOARD_NAME; 57 } 58 59 int swarm_be_handler(struct pt_regs *regs, int is_fixup) 60 { 61 if (!is_fixup && (regs->cp0_cause & 4)) { 62 /* Data bus error - print PA */ 63 printk("DBE physical address: %010Lx\n", 64 __read_64bit_c0_register($26, 1)); 65 } 66 return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL; 67 } 68 69 enum swarm_rtc_type { 70 RTC_NONE, 71 RTC_XICOR, 72 RTC_M41T81, 73 }; 74 75 enum swarm_rtc_type swarm_rtc_type; 76 77 void read_persistent_clock64(struct timespec64 *ts) 78 { 79 time64_t sec; 80 81 switch (swarm_rtc_type) { 82 case RTC_XICOR: 83 sec = xicor_get_time(); 84 break; 85 86 case RTC_M41T81: 87 sec = m41t81_get_time(); 88 break; 89 90 case RTC_NONE: 91 default: 92 sec = mktime64(2000, 1, 1, 0, 0, 0); 93 break; 94 } 95 ts->tv_sec = sec; 96 ts->tv_nsec = 0; 97 } 98 99 int update_persistent_clock64(struct timespec64 now) 100 { 101 time64_t sec = now.tv_sec; 102 103 switch (swarm_rtc_type) { 104 case RTC_XICOR: 105 return xicor_set_time(sec); 106 107 case RTC_M41T81: 108 return m41t81_set_time(sec); 109 110 case RTC_NONE: 111 default: 112 return -1; 113 } 114 } 115 116 void __init plat_mem_setup(void) 117 { 118 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) 119 bcm1480_setup(); 120 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) 121 sb1250_setup(); 122 #else 123 #error invalid SiByte board configuration 124 #endif 125 126 board_be_handler = swarm_be_handler; 127 128 if (xicor_probe()) 129 swarm_rtc_type = RTC_XICOR; 130 if (m41t81_probe()) 131 swarm_rtc_type = RTC_M41T81; 132 133 #ifdef CONFIG_VT 134 screen_info = (struct screen_info) { 135 .orig_video_page = 52, 136 .orig_video_mode = 3, 137 .orig_video_cols = 80, 138 .flags = 12, 139 .orig_video_ega_bx = 3, 140 .orig_video_lines = 25, 141 .orig_video_isVGA = 0x22, 142 .orig_video_points = 16, 143 }; 144 /* XXXKW for CFE, get lines/cols from environment */ 145 #endif 146 } 147 148 #ifdef LEDS_PHYS 149 150 #ifdef CONFIG_SIBYTE_CARMEL 151 /* XXXKW need to detect Monterey/LittleSur/etc */ 152 #undef LEDS_PHYS 153 #define LEDS_PHYS MLEDS_PHYS 154 #endif 155 156 void setleds(char *str) 157 { 158 void *reg; 159 int i; 160 161 for (i = 0; i < 4; i++) { 162 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3); 163 164 if (!str[i]) 165 writeb(' ', reg); 166 else 167 writeb(str[i], reg); 168 } 169 } 170 171 #endif /* LEDS_PHYS */ 172