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
  27 static 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  */
  78 static void __init
  79 fixup_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
  86 MACHINE_START(CATS, "Chalice-CATS")
  87         /* Maintainer: Philip Blundell */
  88         .atag_offset    = 0x100,
  89         .restart_mode   = 's',
  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,
  95 MACHINE_END