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
  13 #include <asm/hardware/dec21285.h>
  14 #include <asm/io.h>
  15 #include <asm/mach-types.h>
  16 #include <asm/setup.h>
  17
  18 #include <asm/mach/arch.h>
  19
  20 #include "common.h"
  21
  22 #define CFG_PORT        0x370
  23 #define INDEX_PORT      (CFG_PORT)
  24 #define DATA_PORT       (CFG_PORT + 1)
  25
  26 static int __init cats_hw_init(void)
  27 {
  28         if (machine_is_cats()) {
  29                 /* Set Aladdin to CONFIGURE mode */
  30                 outb(0x51, CFG_PORT);
  31                 outb(0x23, CFG_PORT);
  32
  33                 /* Select logical device 3 */
  34                 outb(0x07, INDEX_PORT);
  35                 outb(0x03, DATA_PORT);
  36
  37                 /* Set parallel port to DMA channel 3, ECP+EPP1.9,
  38                    enable EPP timeout */
  39                 outb(0x74, INDEX_PORT);
  40                 outb(0x03, DATA_PORT);
  41
  42                 outb(0xf0, INDEX_PORT);
  43                 outb(0x0f, DATA_PORT);
  44
  45                 outb(0xf1, INDEX_PORT);
  46                 outb(0x07, DATA_PORT);
  47
  48                 /* Select logical device 4 */
  49                 outb(0x07, INDEX_PORT);
  50                 outb(0x04, DATA_PORT);
  51
  52                 /* UART1 high speed mode */
  53                 outb(0xf0, INDEX_PORT);
  54                 outb(0x02, DATA_PORT);
  55
  56                 /* Select logical device 5 */
  57                 outb(0x07, INDEX_PORT);
  58                 outb(0x05, DATA_PORT);
  59
  60                 /* UART2 high speed mode */
  61                 outb(0xf0, INDEX_PORT);
  62                 outb(0x02, DATA_PORT);
  63
  64                 /* Set Aladdin to RUN mode */
  65                 outb(0xbb, CFG_PORT);
  66         }
  67
  68         return 0;
  69 }
  70
  71 __initcall(cats_hw_init);
  72
  73 /*
  74  * CATS uses soft-reboot by default, since
  75  * hard reboots fail on early boards.
  76  */
  77 static void __init
  78 fixup_cats(struct machine_desc *desc, struct tag *tags,
  79            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
  86 MACHINE_START(CATS, "Chalice-CATS")
  87         /* Maintainer: Philip Blundell */
  88         .phys_io        = DC21285_ARMCSR_BASE,
  89         .io_pg_offst    = ((0xfe000000) >> 18) & 0xfffc,
  90         .boot_params    = 0x00000100,
  91         .soft_reboot    = 1,
  92         .fixup          = fixup_cats,
  93         .map_io         = footbridge_map_io,
  94         .init_irq       = footbridge_init_irq,
  95         .timer          = &isa_timer,
  96 MACHINE_END