arch/mips/sibyte/swarm/setup.c

   1 /*
   2  * Copyright (C) 2000, 2001, 2002, 2003 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/config.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/mm.h>
  27 #include <linux/bootmem.h>
  28 #include <linux/blkdev.h>
  29 #include <linux/init.h>
  30 #include <linux/kernel.h>
  31 #include <linux/tty.h>
  32 #include <linux/initrd.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/io.h>
  36 #include <asm/bootinfo.h>
  37 #include <asm/mipsregs.h>
  38 #include <asm/reboot.h>
  39 #include <asm/time.h>
  40 #include <asm/traps.h>
  41 #include <asm/sibyte/sb1250.h>
  42 #include <asm/sibyte/sb1250_regs.h>
  43 #include <asm/sibyte/sb1250_genbus.h>
  44 #include <asm/sibyte/board.h>
  45
  46 extern void sb1250_setup(void);
  47
  48 extern int xicor_probe(void);
  49 extern int xicor_set_time(unsigned long);
  50 extern unsigned long xicor_get_time(void);
  51
  52 extern int m41t81_probe(void);
  53 extern int m41t81_set_time(unsigned long);
  54 extern unsigned long m41t81_get_time(void);
  55
  56 const char *get_system_type(void)
  57 {
  58         return "SiByte " SIBYTE_BOARD_NAME;
  59 }
  60
  61 void __init swarm_timer_setup(struct irqaction *irq)
  62 {
  63         /*
  64          * we don't set up irqaction, because we will deliver timer
  65          * interrupts through low-level (direct) meachanism.
  66          */
  67
  68         /* We only need to setup the generic timer */
  69         sb1250_time_init();
  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 #ifdef CONFIG_MIPS64
  77                 printk("DBE physical address: %010lx\n",
  78                        __read_64bit_c0_register($26, 1));
  79 #else
  80                 printk("DBE physical address: %010llx\n",
  81                        __read_64bit_c0_split($26, 1));
  82 #endif
  83         }
  84         return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
  85 }
  86
  87 static int __init swarm_setup(void)
  88 {
  89         sb1250_setup();
  90
  91         panic_timeout = 5;  /* For debug.  */
  92
  93         board_timer_setup = swarm_timer_setup;
  94         board_be_handler = swarm_be_handler;
  95
  96         if (xicor_probe()) {
  97                 printk("swarm setup: Xicor 1241 RTC detected.\n");
  98                 rtc_get_time = xicor_get_time;
  99                 rtc_set_time = xicor_set_time;
 100         }
 101
 102         if (m41t81_probe()) {
 103                 printk("swarm setup: M41T81 RTC detected.\n");
 104                 rtc_get_time = m41t81_get_time;
 105                 rtc_set_time = m41t81_set_time;
 106         }
 107
 108         printk("This kernel optimized for "
 109 #ifdef CONFIG_SIMULATION
 110                "simulation"
 111 #else
 112                "board"
 113 #endif
 114                " runs "
 115 #ifdef CONFIG_SIBYTE_CFE
 116                "with"
 117 #else
 118                "without"
 119 #endif
 120                " CFE\n");
 121
 122 #ifdef CONFIG_VT
 123         screen_info = (struct screen_info) {
 124                 0, 0,           /* orig-x, orig-y */
 125                 0,              /* unused */
 126                 52,             /* orig_video_page */
 127                 3,              /* orig_video_mode */
 128                 80,             /* orig_video_cols */
 129                 4626, 3, 9,     /* unused, ega_bx, unused */
 130                 25,             /* orig_video_lines */
 131                 0x22,           /* orig_video_isVGA */
 132                 16              /* orig_video_points */
 133        };
 134        /* XXXKW for CFE, get lines/cols from environment */
 135 #endif
 136
 137         return 0;
 138 }
 139
 140 early_initcall(swarm_setup);
 141
 142 #ifdef LEDS_PHYS
 143
 144 #ifdef CONFIG_SIBYTE_CARMEL
 145 /* XXXKW need to detect Monterey/LittleSur/etc */
 146 #undef LEDS_PHYS
 147 #define LEDS_PHYS MLEDS_PHYS
 148 #endif
 149
 150 #define setled(index, c) \
 151   ((unsigned char *)(IOADDR(LEDS_PHYS)+0x20))[(3-(index))<<3] = (c)
 152 void setleds(char *str)
 153 {
 154         int i;
 155         for (i = 0; i < 4; i++) {
 156                 if (!str[i]) {
 157                         setled(i, ' ');
 158                 } else {
 159                         setled(i, str[i]);
 160                 }
 161         }
 162 }
 163 #endif