arch/mips/galileo-boards/ev96100/setup.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      Galileo EV96100 setup.
   4  *
   5  * Copyright 2000 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  * This file was derived from Carsten Langgaard's
  10  * arch/mips/mips-boards/atlas/atlas_setup.c.
  11  *
  12  * Carsten Langgaard, carstenl@mips.com
  13  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  14  *
  15  *  This program is free software; you can redistribute  it and/or modify it
  16  *  under  the terms of  the GNU General  Public License as published by the
  17  *  Free Software Foundation;  either version 2 of the  License, or (at your
  18  *  option) any later version.
  19  *
  20  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  21  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  22  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  23  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  24  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  26  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  27  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  28  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  29  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *  You should have received a copy of the  GNU General Public License along
  32  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  33  *  675 Mass Ave, Cambridge, MA 02139, USA.
  34  */
  35 #include <linux/config.h>
  36 #include <linux/init.h>
  37 #include <linux/sched.h>
  38 #include <linux/ioport.h>
  39 #include <linux/string.h>
  40 #include <linux/ctype.h>
  41 #include <linux/pci.h>
  42
  43 #include <asm/cpu.h>
  44 #include <asm/bootinfo.h>
  45 #include <asm/mipsregs.h>
  46 #include <asm/irq.h>
  47 #include <asm/delay.h>
  48 #include <asm/gt64120.h>
  49 #include <asm/galileo-boards/ev96100int.h>
  50
  51
  52 extern char *__init prom_getcmdline(void);
  53
  54 extern void mips_reboot_setup(void);
  55
  56 unsigned char mac_0_1[12];
  57
  58 void __init plat_setup(void)
  59 {
  60         unsigned int config = read_c0_config();
  61         unsigned int status = read_c0_status();
  62         unsigned int info = read_c0_info();
  63         u32 tmp;
  64
  65         char *argptr;
  66
  67         clear_c0_status(ST0_FR);
  68
  69         if (config & 0x8)
  70                 printk("Secondary cache is enabled\n");
  71         else
  72                 printk("Secondary cache is disabled\n");
  73
  74         if (status & (1 << 27))
  75                 printk("User-mode cache ops enabled\n");
  76         else
  77                 printk("User-mode cache ops disabled\n");
  78
  79         printk("CP0 info reg: %x\n", (unsigned) info);
  80         if (info & (1 << 28))
  81                 printk("burst mode Scache RAMS\n");
  82         else
  83                 printk("pipelined Scache RAMS\n");
  84
  85         if (info & 0x1)
  86                 printk("Atomic Enable is set\n");
  87
  88         argptr = prom_getcmdline();
  89 #ifdef CONFIG_SERIAL_CONSOLE
  90         if (strstr(argptr, "console=") == NULL) {
  91                 argptr = prom_getcmdline();
  92                 strcat(argptr, " console=ttyS0,115200");
  93         }
  94 #endif
  95
  96         mips_reboot_setup();
  97
  98         set_io_port_base(KSEG1);
  99         ioport_resource.start = GT_PCI_IO_BASE;
 100         ioport_resource.end = GT_PCI_IO_BASE + 0x01ffffff;
 101
 102 #ifdef CONFIG_BLK_DEV_INITRD
 103         ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
 104 #endif
 105
 106
 107         /*
 108          * Setup GT controller master bit so we can do config cycles
 109          */
 110
 111         /* Clear cause register bits */
 112         GT_WRITE(GT_INTRCAUSE_OFS, ~(GT_INTRCAUSE_MASABORT0_BIT |
 113                                      GT_INTRCAUSE_TARABORT0_BIT));
 114         /* Setup address */
 115         GT_WRITE(GT_PCI0_CFGADDR_OFS,
 116                  (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) |
 117                  (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) |
 118                  ((PCI_COMMAND / 4) << GT_PCI0_CFGADDR_REGNUM_SHF) |
 119                  GT_PCI0_CFGADDR_CONFIGEN_BIT);
 120
 121         udelay(2);
 122         tmp = GT_READ(GT_PCI0_CFGDATA_OFS);
 123
 124         tmp |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
 125                 PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
 126         GT_WRITE(GT_PCI0_CFGADDR_OFS,
 127                  (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) |
 128                  (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) |
 129                  ((PCI_COMMAND / 4) << GT_PCI0_CFGADDR_REGNUM_SHF) |
 130                  GT_PCI0_CFGADDR_CONFIGEN_BIT);
 131         udelay(2);
 132         GT_WRITE(GT_PCI0_CFGDATA_OFS, tmp);
 133
 134         /* Setup address */
 135         GT_WRITE(GT_PCI0_CFGADDR_OFS,
 136                  (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) |
 137                  (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) |
 138                  ((PCI_COMMAND / 4) << GT_PCI0_CFGADDR_REGNUM_SHF) |
 139                  GT_PCI0_CFGADDR_CONFIGEN_BIT);
 140
 141         udelay(2);
 142         tmp = GT_READ(GT_PCI0_CFGDATA_OFS);
 143 }
 144
 145 unsigned short get_gt_devid(void)
 146 {
 147         u32 gt_devid;
 148
 149         /* Figure out if this is a gt96100 or gt96100A */
 150         GT_WRITE(GT_PCI0_CFGADDR_OFS,
 151                  (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) |
 152                  (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) |
 153                  ((PCI_VENDOR_ID / 4) << GT_PCI0_CFGADDR_REGNUM_SHF) |
 154                  GT_PCI0_CFGADDR_CONFIGEN_BIT);
 155
 156         udelay(4);
 157         gt_devid = GT_READ(GT_PCI0_CFGDATA_OFS);
 158
 159         return gt_devid >> 16;
 160 }