LXR linux/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)
  52extern void bcm1480_setup(void);
  53#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  54extern void sb1250_setup(void);
  55#else
  56#error invalid SiByte board configuration
  57#endif
  58
  59extern int xicor_probe(void);
  60extern int xicor_set_time(unsigned long);
  61extern unsigned long xicor_get_time(void);
  62
  63extern int m41t81_probe(void);
  64extern int m41t81_set_time(unsigned long);
  65extern unsigned long m41t81_get_time(void);
  66
  67const char *get_system_type(void)
  68{
  69        return "SiByte " SIBYTE_BOARD_NAME;
  70}
  71
  72int 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
  82enum swarm_rtc_type {
  83        RTC_NONE,
  84        RTC_XICOR,
  85        RTC_M41T81,
  86};
  87
  88enum swarm_rtc_type swarm_rtc_type;
  89
  90void 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_M41T81:
 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
 112int 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_M41T81:
 119                return m41t81_set_time(sec);
 120
 121        case RTC_NONE:
 122        default:
 123                return -1;
 124        }
 125}
 126
 127void __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        board_be_handler = swarm_be_handler;
 138
 139        if (xicor_probe())
 140                swarm_rtc_type = RTC_XICOR;
 141        if (m41t81_probe())
 142                swarm_rtc_type = RTC_M41T81;
 143
 144#ifdef CONFIG_VT
 145        screen_info = (struct screen_info) {
 146                .orig_video_page        = 52,
 147                .orig_video_mode        = 3,
 148                .orig_video_cols        = 80,
 149                .flags                  = 12,
 150                .orig_video_ega_bx      = 3,
 151                .orig_video_lines       = 25,
 152                .orig_video_isVGA       = 0x22,
 153                .orig_video_points      = 16,
 154       };
 155       /* XXXKW for CFE, get lines/cols from environment */
 156#endif
 157}
 158
 159#ifdef LEDS_PHYS
 160
 161#ifdef CONFIG_SIBYTE_CARMEL
 162/* XXXKW need to detect Monterey/LittleSur/etc */
 163#undef LEDS_PHYS
 164#define LEDS_PHYS MLEDS_PHYS
 165#endif
 166
 167void setleds(char *str)
 168{
 169        void *reg;
 170        int i;
 171
 172        for (i = 0; i < 4; i++) {
 173                reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
 174
 175                if (!str[i])
 176                        writeb(' ', reg);
 177                else
 178                        writeb(str[i], reg);
 179        }
 180}
 181
 182#endif /* LEDS_PHYS */
 183