arch/sh/boards/ec3104/setup.c

   1 /*
   2  * linux/arch/sh/boards/ec3104/setup.c
   3  *  EC3104 companion chip support
   4  *
   5  * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
   6  *
   7  */
   8 /* EC3104 note:
   9  * This code was written without any documentation about the EC3104 chip.  While
  10  * I hope I got most of the basic functionality right, the register names I use
  11  * are most likely completely different from those in the chip documentation.
  12  *
  13  * If you have any further information about the EC3104, please tell me
  14  * (prumpf@tux.org).
  15  */
  16
  17 #include <linux/sched.h>
  18 #include <linux/kernel.h>
  19 #include <linux/param.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/irq.h>
  23 #include <linux/types.h>
  24
  25 #include <asm/io.h>
  26 #include <asm/irq.h>
  27 #include <asm/machvec.h>
  28 #include <asm/mach/ec3104.h>
  29
  30 const char *get_system_type(void)
  31 {
  32         return "EC3104";
  33 }
  34
  35 /*
  36  * The Machine Vector
  37  */
  38
  39 struct sh_machine_vector mv_ec3104 __initmv = {
  40         .mv_nr_irqs     = 96,
  41
  42         .mv_inb         = ec3104_inb,
  43         .mv_inw         = ec3104_inw,
  44         .mv_inl         = ec3104_inl,
  45         .mv_outb        = ec3104_outb,
  46         .mv_outw        = ec3104_outw,
  47         .mv_outl        = ec3104_outl,
  48
  49         .mv_irq_demux   = ec3104_irq_demux,
  50 };
  51
  52 ALIAS_MV(ec3104)
  53
  54 int __init platform_setup(void)
  55 {
  56         char str[8];
  57         int i;
  58
  59         if (0)
  60                 return 0;
  61
  62         for (i=0; i<8; i++)
  63                 str[i] = ctrl_readb(EC3104_BASE + i);
  64
  65         for (i = EC3104_IRQBASE; i < EC3104_IRQBASE + 32; i++)
  66                 irq_desc[i].handler = &ec3104_int;
  67
  68         printk("initializing EC3104 \"%.8s\" at %08x, IRQ %d, IRQ base %d\n",
  69                str, EC3104_BASE, EC3104_IRQ, EC3104_IRQBASE);
  70
  71
  72         /* mask all interrupts.  this should have been done by the boot
  73          * loader for us but we want to be sure ... */
  74         ctrl_writel(0xffffffff, EC3104_IMR);
  75
  76         return 0;
  77 }
  78