LXR linux/arch/arm/mach-footbridge/cats-hw.c

   1/*
   2 * linux/arch/arm/mach-footbridge/cats-hw.c
   3 *
   4 * CATS machine fixup
   5 *
   6 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
   7 */
   8#include <linux/ioport.h>
   9#include <linux/kernel.h>
  10#include <linux/init.h>
  11#include <linux/screen_info.h>
  12#include <linux/io.h>
  13#include <linux/spinlock.h>
  14
  15#include <asm/hardware/dec21285.h>
  16#include <asm/mach-types.h>
  17#include <asm/setup.h>
  18
  19#include <asm/mach/arch.h>
  20
  21#include "common.h"
  22
  23#define CFG_PORT        0x370
  24#define INDEX_PORT      (CFG_PORT)
  25#define DATA_PORT       (CFG_PORT + 1)
  26
  27static int __init cats_hw_init(void)
  28{
  29        if (machine_is_cats()) {
  30                /* Set Aladdin to CONFIGURE mode */
  31                outb(0x51, CFG_PORT);
  32                outb(0x23, CFG_PORT);
  33
  34                /* Select logical device 3 */
  35                outb(0x07, INDEX_PORT);
  36                outb(0x03, DATA_PORT);
  37
  38                /* Set parallel port to DMA channel 3, ECP+EPP1.9, 
  39                   enable EPP timeout */
  40                outb(0x74, INDEX_PORT);
  41                outb(0x03, DATA_PORT);
  42        
  43                outb(0xf0, INDEX_PORT);
  44                outb(0x0f, DATA_PORT);
  45
  46                outb(0xf1, INDEX_PORT);
  47                outb(0x07, DATA_PORT);
  48
  49                /* Select logical device 4 */
  50                outb(0x07, INDEX_PORT);
  51                outb(0x04, DATA_PORT);
  52
  53                /* UART1 high speed mode */
  54                outb(0xf0, INDEX_PORT);
  55                outb(0x02, DATA_PORT);
  56
  57                /* Select logical device 5 */
  58                outb(0x07, INDEX_PORT);
  59                outb(0x05, DATA_PORT);
  60
  61                /* UART2 high speed mode */
  62                outb(0xf0, INDEX_PORT);
  63                outb(0x02, DATA_PORT);
  64
  65                /* Set Aladdin to RUN mode */
  66                outb(0xbb, CFG_PORT);
  67        }
  68
  69        return 0;
  70}
  71
  72__initcall(cats_hw_init);
  73
  74/*
  75 * CATS uses soft-reboot by default, since
  76 * hard reboots fail on early boards.
  77 */
  78static void __init
  79fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
  80{
  81        screen_info.orig_video_lines  = 25;
  82        screen_info.orig_video_points = 16;
  83        screen_info.orig_y = 24;
  84}
  85
  86MACHINE_START(CATS, "Chalice-CATS")
  87        /* Maintainer: Philip Blundell */
  88        .atag_offset    = 0x100,
  89        .reboot_mode    = REBOOT_SOFT,
  90        .fixup          = fixup_cats,
  91        .map_io         = footbridge_map_io,
  92        .init_irq       = footbridge_init_irq,
  93        .init_time      = isa_timer_init,
  94        .restart        = footbridge_restart,
  95MACHINE_END
  96