1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/interrupt.h>
6 #include <asm/apollohw.h>
10 static unsigned int apollo_irq_startup(struct irq_data *data)
12 unsigned int irq = data->irq;
15 *(volatile unsigned char *)(pica+1) &= ~(1 << irq);
17 *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
21 static void apollo_irq_shutdown(struct irq_data *data)
23 unsigned int irq = data->irq;
26 *(volatile unsigned char *)(pica+1) |= (1 << irq);
28 *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
31 static void apollo_irq_eoi(struct irq_data *data)
33 *(volatile unsigned char *)(pica) = 0x20;
34 *(volatile unsigned char *)(picb) = 0x20;
37 static struct irq_chip apollo_irq_chip = {
39 .irq_startup = apollo_irq_startup,
40 .irq_shutdown = apollo_irq_shutdown,
41 .irq_eoi = apollo_irq_eoi,
45 void __init dn_init_IRQ(void)
47 m68k_setup_user_interrupt(VEC_USER + 96, 16);
48 m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,