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

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/arch/arm/mach-footbridge/cats-hw.c
   4 *
   5 * CATS machine fixup
   6 *
   7 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
   8 */
   9#include <linux/ioport.h>
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/screen_info.h>
  13#include <linux/io.h>
  14#include <linux/spinlock.h>
  15
  16#include <asm/hardware/dec21285.h>
  17#include <asm/mach-types.h>
  18#include <asm/setup.h>
  19
  20#include <asm/mach/arch.h>
  21
  22#include "common.h"
  23
  24#define CFG_PORT        0x370
  25#define INDEX_PORT      (CFG_PORT)
  26#define DATA_PORT       (CFG_PORT + 1)
  27
  28static int __init cats_hw_init(void)
  29{
  30        if (machine_is_cats()) {
  31                /* Set Aladdin to CONFIGURE mode */
  32                outb(0x51, CFG_PORT);
  33                outb(0x23, CFG_PORT);
  34
  35                /* Select logical device 3 */
  36                outb(0x07, INDEX_PORT);
  37                outb(0x03, DATA_PORT);
  38
  39                /* Set parallel port to DMA channel 3, ECP+EPP1.9, 
  40                   enable EPP timeout */
  41                outb(0x74, INDEX_PORT);
  42                outb(0x03, DATA_PORT);
  43        
  44                outb(0xf0, INDEX_PORT);
  45                outb(0x0f, DATA_PORT);
  46
  47                outb(0xf1, INDEX_PORT);
  48                outb(0x07, DATA_PORT);
  49
  50                /* Select logical device 4 */
  51                outb(0x07, INDEX_PORT);
  52                outb(0x04, DATA_PORT);
  53
  54                /* UART1 high speed mode */
  55                outb(0xf0, INDEX_PORT);
  56                outb(0x02, DATA_PORT);
  57
  58                /* Select logical device 5 */
  59                outb(0x07, INDEX_PORT);
  60                outb(0x05, DATA_PORT);
  61
  62                /* UART2 high speed mode */
  63                outb(0xf0, INDEX_PORT);
  64                outb(0x02, DATA_PORT);
  65
  66                /* Set Aladdin to RUN mode */
  67                outb(0xbb, CFG_PORT);
  68        }
  69
  70        return 0;
  71}
  72
  73__initcall(cats_hw_init);
  74
  75/*
  76 * CATS uses soft-reboot by default, since
  77 * hard reboots fail on early boards.
  78 */
  79static void __init
  80fixup_cats(struct tag *tags, char **cmdline)
  81{
  82#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
  83        screen_info.orig_video_lines  = 25;
  84        screen_info.orig_video_points = 16;
  85        screen_info.orig_y = 24;
  86#endif
  87}
  88
  89MACHINE_START(CATS, "Chalice-CATS")
  90        /* Maintainer: Philip Blundell */
  91        .atag_offset    = 0x100,
  92        .reboot_mode    = REBOOT_SOFT,
  93        .fixup          = fixup_cats,
  94        .map_io         = footbridge_map_io,
  95        .init_irq       = footbridge_init_irq,
  96        .init_time      = isa_timer_init,
  97        .restart        = footbridge_restart,
  98MACHINE_END
  99