arch/mips/sibyte/swarm/setup.c

   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_M4LT81
  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_M4LT81:
 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_M4LT81:
 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_M4LT81;
 145
 146 #ifdef CONFIG_VT
 147         screen_info = (struct screen_info) {
 148                 0, 0,           /* orig-x, orig-y */
 149                 0,              /* unused */
 150                 52,             /* orig_video_page */
 151                 3,              /* orig_video_mode */
 152                 80,             /* orig_video_cols */
 153                 4626, 3, 9,     /* unused, ega_bx, unused */
 154                 25,             /* orig_video_lines */
 155                 0x22,           /* orig_video_isVGA */
 156                 16              /* orig_video_points */
 157        };
 158        /* XXXKW for CFE, get lines/cols from environment */
 159 #endif
 160 }
 161
 162 #ifdef LEDS_PHYS
 163
 164 #ifdef CONFIG_SIBYTE_CARMEL
 165 /* XXXKW need to detect Monterey/LittleSur/etc */
 166 #undef LEDS_PHYS
 167 #define LEDS_PHYS MLEDS_PHYS
 168 #endif
 169
 170 void setleds(char *str)
 171 {
 172         void *reg;
 173         int i;
 174
 175         for (i = 0; i < 4; i++) {
 176                 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
 177
 178                 if (!str[i])
 179                         writeb(' ', reg);
 180                 else
 181                         writeb(str[i], reg);
 182         }
 183 }
 184
 185 #endif /* LEDS_PHYS */