arch/m68k/apollo/dn_ints.c

   1 #include <linux/interrupt.h>
   2
   3 #include <asm/irq.h>
   4 #include <asm/traps.h>
   5 #include <asm/apollohw.h>
   6
   7 void dn_process_int(unsigned int irq, struct pt_regs *fp)
   8 {
   9         __m68k_handle_int(irq, fp);
  10
  11         *(volatile unsigned char *)(pica)=0x20;
  12         *(volatile unsigned char *)(picb)=0x20;
  13 }
  14
  15 unsigned int apollo_irq_startup(struct irq_data *data)
  16 {
  17         unsigned int irq = data->irq;
  18
  19         if (irq < 8)
  20                 *(volatile unsigned char *)(pica+1) &= ~(1 << irq);
  21         else
  22                 *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
  23         return 0;
  24 }
  25
  26 void apollo_irq_shutdown(struct irq_data *data)
  27 {
  28         unsigned int irq = data->irq;
  29
  30         if (irq < 8)
  31                 *(volatile unsigned char *)(pica+1) |= (1 << irq);
  32         else
  33                 *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
  34 }
  35
  36 static struct irq_chip apollo_irq_chip = {
  37         .name           = "apollo",
  38         .irq_startup    = apollo_irq_startup,
  39         .irq_shutdown   = apollo_irq_shutdown,
  40 };
  41
  42
  43 void __init dn_init_IRQ(void)
  44 {
  45         m68k_setup_user_interrupt(VEC_USER + 96, 16, dn_process_int);
  46         m68k_setup_irq_chip(&apollo_irq_chip, IRQ_APOLLO, 16);
  47 }