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 void __init swarm_time_init(void)
  73 {
  74 #if defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  75         /* Setup HPT */
  76         sb1250_hpt_setup();
  77 #endif
  78 }
  79
  80 void __init plat_timer_setup(struct irqaction *irq)
  81 {
  82         /*
  83          * we don't set up irqaction, because we will deliver timer
  84          * interrupts through low-level (direct) meachanism.
  85          */
  86
  87         /* We only need to setup the generic timer */
  88 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
  89         bcm1480_time_init();
  90 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  91         sb1250_time_init();
  92 #else
  93 #error invalid SiByte board configuration
  94 #endif
  95 }
  96
  97 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
  98 {
  99         if (!is_fixup && (regs->cp0_cause & 4)) {
 100                 /* Data bus error - print PA */
 101                 printk("DBE physical address: %010Lx\n",
 102                        __read_64bit_c0_register($26, 1));
 103         }
 104         return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
 105 }
 106
 107 void __init plat_mem_setup(void)
 108 {
 109 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
 110         bcm1480_setup();
 111 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 112         sb1250_setup();
 113 #else
 114 #error invalid SiByte board configuration
 115 #endif
 116
 117         panic_timeout = 5;  /* For debug.  */
 118
 119         board_time_init = swarm_time_init;
 120         board_be_handler = swarm_be_handler;
 121
 122         if (xicor_probe()) {
 123                 printk("swarm setup: Xicor 1241 RTC detected.\n");
 124                 rtc_mips_get_time = xicor_get_time;
 125                 rtc_mips_set_time = xicor_set_time;
 126         }
 127
 128         if (m41t81_probe()) {
 129                 printk("swarm setup: M41T81 RTC detected.\n");
 130                 rtc_mips_get_time = m41t81_get_time;
 131                 rtc_mips_set_time = m41t81_set_time;
 132         }
 133
 134         printk("This kernel optimized for "
 135 #ifdef CONFIG_SIMULATION
 136                "simulation"
 137 #else
 138                "board"
 139 #endif
 140                " runs "
 141 #ifdef CONFIG_SIBYTE_CFE
 142                "with"
 143 #else
 144                "without"
 145 #endif
 146                " CFE\n");
 147
 148 #ifdef CONFIG_VT
 149         screen_info = (struct screen_info) {
 150                 0, 0,           /* orig-x, orig-y */
 151                 0,              /* unused */
 152                 52,             /* orig_video_page */
 153                 3,              /* orig_video_mode */
 154                 80,             /* orig_video_cols */
 155                 4626, 3, 9,     /* unused, ega_bx, unused */
 156                 25,             /* orig_video_lines */
 157                 0x22,           /* orig_video_isVGA */
 158                 16              /* orig_video_points */
 159        };
 160        /* XXXKW for CFE, get lines/cols from environment */
 161 #endif
 162 }
 163
 164 #ifdef LEDS_PHYS
 165
 166 #ifdef CONFIG_SIBYTE_CARMEL
 167 /* XXXKW need to detect Monterey/LittleSur/etc */
 168 #undef LEDS_PHYS
 169 #define LEDS_PHYS MLEDS_PHYS
 170 #endif
 171
 172 void setleds(char *str)
 173 {
 174         void *reg;
 175         int i;
 176
 177         for (i = 0; i < 4; i++) {
 178                 reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
 179
 180                 if (!str[i])
 181                         writeb(' ', reg);
 182                 else
 183                         writeb(str[i], reg);
 184         }
 185 }
 186
 187 #endif /* LEDS_PHYS */