arch/mips/sni/setup.c

   1 /* $Id: setup.c,v 1.10 1999/01/04 16:03:59 ralf Exp $
   2  *
   3  * Setup pointers to hardware-dependent routines.
   4  *
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  *
   9  * Copyright (C) 1996, 1997, 1998 by Ralf Baechle
  10  */
  11 #include <asm/ptrace.h>
  12 #include <linux/config.h>
  13 #include <linux/hdreg.h>
  14 #include <linux/ioport.h>
  15 #include <linux/sched.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/timex.h>
  19 #include <linux/pci.h>
  20 #include <linux/mc146818rtc.h>
  21 #include <linux/console.h>
  22 #include <linux/fb.h>
  23 #include <linux/pc_keyb.h>
  24
  25 #include <asm/bcache.h>
  26 #include <asm/bootinfo.h>
  27 #include <asm/keyboard.h>
  28 #include <asm/ide.h>
  29 #include <asm/io.h>
  30 #include <asm/irq.h>
  31 #include <asm/processor.h>
  32 #include <asm/reboot.h>
  33 #include <asm/sni.h>
  34 #include <asm/pci.h>
  35
  36 /*
  37  * Initial irq handlers.
  38  */
  39 static void no_action(int cpl, void *dev_id, struct pt_regs *regs) { }
  40
  41 /*
  42  * IRQ2 is cascade interrupt to second interrupt controller
  43  */
  44 static struct irqaction irq2  = { no_action, 0, 0, "cascade", NULL, NULL};
  45
  46 extern asmlinkage void sni_rm200_pci_handle_int(void);
  47
  48 extern void sni_machine_restart(char *command);
  49 extern void sni_machine_halt(void);
  50 extern void sni_machine_power_off(void);
  51
  52 extern struct ide_ops std_ide_ops;
  53 extern struct rtc_ops std_rtc_ops;
  54 extern struct kbd_ops std_kbd_ops;
  55
  56 __initfunc(static void sni_irq_setup(void))
  57 {
  58         set_except_vector(0, sni_rm200_pci_handle_int);
  59         request_region(0x20,0x20, "pic1");
  60         request_region(0xa0,0x20, "pic2");
  61         i8259_setup_irq(2, &irq2);
  62         /*
  63          * IRQ0 seems to be the irq for PC style stuff.
  64          * I don't know how to handle the debug button interrupt, so
  65          * don't use this button yet or bad things happen ...
  66          */
  67         set_cp0_status(ST0_IM, IE_IRQ1 | IE_IRQ3 | IE_IRQ4);
  68 }
  69
  70 void (*board_time_init)(struct irqaction *irq);
  71
  72 __initfunc(static void sni_rm200_pci_time_init(struct irqaction *irq))
  73 {
  74         /* set the clock to 100 Hz */
  75         outb_p(0x34,0x43);              /* binary, mode 2, LSB/MSB, ch 0 */
  76         outb_p(LATCH & 0xff , 0x40);    /* LSB */
  77         outb(LATCH >> 8 , 0x40);        /* MSB */
  78         i8259_setup_irq(0, irq);
  79 }
  80
  81 unsigned char aux_device_present;
  82 extern struct pci_ops sni_pci_ops;
  83 extern unsigned char sni_map_isa_cache;
  84
  85 /*
  86  * A bit more gossip about the iron we're running on ...
  87  */
  88 static inline void sni_pcimt_detect(void)
  89 {
  90         char boardtype[80];
  91         unsigned char csmsr;
  92         char *p = boardtype;
  93         unsigned int asic;
  94
  95         csmsr = *(volatile unsigned char *)PCIMT_CSMSR;
  96
  97         p += sprintf(p, "%s PCI", (csmsr & 0x80) ? "RM200" : "RM300");
  98         if ((csmsr & 0x80) == 0)
  99                 p += sprintf(p, ", board revision %s",
 100                              (csmsr & 0x20) ? "D" : "C");
 101         asic = csmsr & 0x80;
 102         asic = (csmsr & 0x08) ? asic : !asic;
 103         p += sprintf(p, ", ASIC PCI Rev %s", asic ? "1.0" : "1.1");
 104         printk("%s.\n", boardtype);
 105 }
 106
 107 __initfunc(void sni_rm200_pci_setup(void))
 108 {
 109         tag *atag;
 110
 111         /*
 112          * We just check if a tag_screen_info can be gathered
 113          * in setup_arch(), if yes we don't proceed futher...
 114          */
 115         atag = bi_TagFind(tag_screen_info);
 116         if (!atag) {
 117                 /*
 118                  * If no, we try to find the tag_arc_displayinfo which is
 119                  * always created by Milo for an ARC box (for now Milo only
 120                  * works on ARC boxes :) -Stoned.
 121                  */
 122                 atag = bi_TagFind(tag_arcdisplayinfo);
 123                 if (atag) {
 124                         screen_info.orig_x =
 125                                 ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->cursor_x;
 126                         screen_info.orig_y =
 127                                 ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->cursor_y;
 128                         screen_info.orig_video_cols  =
 129                                 ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->columns;
 130                         screen_info.orig_video_lines  =
 131                                 ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->lines;
 132                 }
 133         }
 134
 135         sni_pcimt_detect();
 136         sni_pcimt_sc_init();
 137
 138         irq_setup = sni_irq_setup;
 139         mips_io_port_base = SNI_PORT_BASE;
 140
 141         /*
 142          * Setup (E)ISA I/O memory access stuff
 143          */
 144         isa_slot_offset = 0xb0000000;
 145         // sni_map_isa_cache = 0;
 146         EISA_bus = 1;
 147
 148         request_region(0x00,0x20,"dma1");
 149         request_region(0x40,0x20,"timer");
 150         /* XXX FIXME: CONFIG_RTC */
 151         request_region(0x70,0x10,"rtc");
 152         request_region(0x80,0x10,"dma page reg");
 153         request_region(0xc0,0x20,"dma2");
 154         board_time_init = sni_rm200_pci_time_init;
 155
 156         _machine_restart = sni_machine_restart;
 157         _machine_halt = sni_machine_halt;
 158         _machine_power_off = sni_machine_power_off;
 159
 160         aux_device_present = 0xaa;
 161
 162         /*
 163          * Some cluefull person has placed the PCI config data directly in
 164          * the I/O port space ...
 165          */
 166         request_region(0xcfc,0x04,"PCI config data");
 167         pci_ops = &sni_pci_ops;
 168
 169 #ifdef CONFIG_BLK_DEV_IDE
 170         ide_ops = &std_ide_ops;
 171 #endif
 172         conswitchp = &vga_con;
 173         rtc_ops = &std_rtc_ops;
 174         kbd_ops = &std_kbd_ops;
 175 #ifdef CONFIG_PSMOUSE
 176         aux_device_present = 0xaa;
 177 #endif
 178 }