arch/sh/boards/cat68701/setup.c

   1 /*
   2  * linux/arch/sh/boards/cat68701/setup.c
   3  *
   4  * Copyright (C) 2000  Niibe Yutaka
   5  *               2001  Yutaro Ebihara
   6  *
   7  * Setup routines for A-ONE Corp CAT-68701 SH7708 Board
   8  *
   9  * This file is subject to the terms and conditions of the GNU General Public
  10  * License.  See the file "COPYING" in the main directory of this archive
  11  * for more details.
  12  *
  13  */
  14
  15 #include <asm/io.h>
  16 #include <asm/machvec.h>
  17 #include <asm/mach/io.h>
  18 #include <linux/config.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/sched.h>
  22
  23 const char *get_system_type(void)
  24 {
  25         return "CAT-68701";
  26 }
  27
  28 #ifdef CONFIG_HEARTBEAT
  29 void heartbeat_cat68701()
  30 {
  31         static unsigned int cnt = 0, period = 0 , bit = 0;
  32         cnt += 1;
  33         if (cnt < period) {
  34                 return;
  35         }
  36         cnt = 0;
  37
  38         /* Go through the points (roughly!):
  39          * f(0)=10, f(1)=16, f(2)=20, f(5)=35,f(inf)->110
  40          */
  41         period = 110 - ( (300<<FSHIFT)/
  42                          ((avenrun[0]/5) + (3<<FSHIFT)) );
  43
  44         if(bit){ bit=0; }else{ bit=1; }
  45         outw(bit<<15,0x3fe);
  46 }
  47 #endif /* CONFIG_HEARTBEAT */
  48
  49 unsigned long cat68701_isa_port2addr(unsigned long offset)
  50 {
  51         /* CompactFlash (IDE) */
  52         if (((offset >= 0x1f0) && (offset <= 0x1f7)) || (offset==0x3f6))
  53                 return 0xba000000 + offset;
  54
  55         /* INPUT PORT */
  56         if ((offset >= 0x3fc) && (offset <= 0x3fd))
  57                 return 0xb4007000 + offset;
  58
  59         /* OUTPUT PORT */
  60         if ((offset >= 0x3fe) && (offset <= 0x3ff))
  61                 return 0xb4007400 + offset;
  62
  63         return offset + 0xb4000000; /* other I/O (EREA 5)*/
  64 }
  65
  66 /*
  67  * The Machine Vector
  68  */
  69
  70 struct sh_machine_vector mv_cat68701 __initmv = {
  71         .mv_nr_irqs             = 32,
  72         .mv_isa_port2addr       = cat68701_isa_port2addr,
  73         .mv_irq_demux           = cat68701_irq_demux,
  74
  75         .mv_init_irq            = init_cat68701_IRQ,
  76 #ifdef CONFIG_HEARTBEAT
  77         .mv_heartbeat           = heartbeat_cat68701,
  78 #endif
  79 };
  80 ALIAS_MV(cat68701)
  81
  82 int __init platform_setup(void)
  83 {
  84         /* dummy read erea5 (CS8900A) */
  85 }
  86