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Linux/arch/m68k/apollo/dn_ints.c

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  1 #include <linux/interrupt.h>
  2 #include <linux/irq.h>
  3 
  4 #include <asm/traps.h>
  5 #include <asm/apollohw.h>
  6 
  7 unsigned int apollo_irq_startup(struct irq_data *data)
  8 {
  9         unsigned int irq = data->irq;
 10 
 11         if (irq < 8)
 12                 *(volatile unsigned char *)(pica+1) &= ~(1 << irq);
 13         else
 14                 *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
 15         return 0;
 16 }
 17 
 18 void apollo_irq_shutdown(struct irq_data *data)
 19 {
 20         unsigned int irq = data->irq;
 21 
 22         if (irq < 8)
 23                 *(volatile unsigned char *)(pica+1) |= (1 << irq);
 24         else
 25                 *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
 26 }
 27 
 28 void apollo_irq_eoi(struct irq_data *data)
 29 {
 30         *(volatile unsigned char *)(pica) = 0x20;
 31         *(volatile unsigned char *)(picb) = 0x20;
 32 }
 33 
 34 static struct irq_chip apollo_irq_chip = {
 35         .name           = "apollo",
 36         .irq_startup    = apollo_irq_startup,
 37         .irq_shutdown   = apollo_irq_shutdown,
 38         .irq_eoi        = apollo_irq_eoi,
 39 };
 40 
 41 
 42 void __init dn_init_IRQ(void)
 43 {
 44         m68k_setup_user_interrupt(VEC_USER + 96, 16);
 45         m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
 46                                   IRQ_APOLLO, 16);
 47 }
 48 

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