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