arch/mips/sibyte/swarm/setup.c

   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/console.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 #ifdef 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 #ifdef 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 #ifdef CONFIG_VGA_CONSOLE
 117 static struct screen_info vgacon_screen_info = {
 118         .orig_video_page        = 52,
 119         .orig_video_mode        = 3,
 120         .orig_video_cols        = 80,
 121         .flags                  = 12,
 122         .orig_video_ega_bx      = 3,
 123         .orig_video_lines       = 25,
 124         .orig_video_isVGA       = 0x22,
 125         .orig_video_points      = 16,
 126 };
 127 #endif
 128
 129 void __init plat_mem_setup(void)
 130 {
 131 #ifdef CONFIG_SIBYTE_BCM1x80
 132         bcm1480_setup();
 133 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 134         sb1250_setup();
 135 #else
 136 #error invalid SiByte board configuration
 137 #endif
 138
 139         mips_set_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_VGA_CONSOLE
 147         vgacon_register_screen(&vgacon_screen_info);
 148        /* XXXKW for CFE, get lines/cols from environment */
 149 #endif
 150 }
 151
 152 #ifdef LEDS_PHYS
 153
 154 void setleds(char *str)
 155 {
 156         void *reg;
 157         int i;
 158
 159         for (i = 0; i < 4; i++) {
 160                 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
 161
 162                 if (!str[i])
 163                         writeb(' ', reg);
 164                 else
 165                         writeb(str[i], reg);
 166         }
 167 }
 168
 169 #endif /* LEDS_PHYS */