1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/interrupt.h>
 3#include <linux/irq.h>
 4
 5#include <asm/traps.h>
 6#include <asm/apollohw.h>
 7
 8unsigned int apollo_irq_startup(struct irq_data *data)
 9{
10	unsigned int irq = data->irq;
11
12	if (irq < 8)
13		*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
14	else
15		*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
16	return 0;
17}
18
19void apollo_irq_shutdown(struct irq_data *data)
20{
21	unsigned int irq = data->irq;
22
23	if (irq < 8)
24		*(volatile unsigned char *)(pica+1) |= (1 << irq);
25	else
26		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
27}
28
29void apollo_irq_eoi(struct irq_data *data)
30{
31	*(volatile unsigned char *)(pica) = 0x20;
32	*(volatile unsigned char *)(picb) = 0x20;
33}
34
35static struct irq_chip apollo_irq_chip = {
36	.name           = "apollo",
37	.irq_startup    = apollo_irq_startup,
38	.irq_shutdown   = apollo_irq_shutdown,
39	.irq_eoi	= apollo_irq_eoi,
40};
41
42
43void __init dn_init_IRQ(void)
44{
45	m68k_setup_user_interrupt(VEC_USER + 96, 16);
46	m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
47				  IRQ_APOLLO, 16);
48}

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/interrupt.h>
 3#include <linux/irq.h>
 4
 5#include <asm/traps.h>
 6#include <asm/apollohw.h>
 7
 8unsigned int apollo_irq_startup(struct irq_data *data)
 9{
10	unsigned int irq = data->irq;
11
12	if (irq < 8)
13		*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
14	else
15		*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
16	return 0;
17}
18
19void apollo_irq_shutdown(struct irq_data *data)
20{
21	unsigned int irq = data->irq;
22
23	if (irq < 8)
24		*(volatile unsigned char *)(pica+1) |= (1 << irq);
25	else
26		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
27}
28
29void apollo_irq_eoi(struct irq_data *data)
30{
31	*(volatile unsigned char *)(pica) = 0x20;
32	*(volatile unsigned char *)(picb) = 0x20;
33}
34
35static struct irq_chip apollo_irq_chip = {
36	.name           = "apollo",
37	.irq_startup    = apollo_irq_startup,
38	.irq_shutdown   = apollo_irq_shutdown,
39	.irq_eoi	= apollo_irq_eoi,
40};
41
42
43void __init dn_init_IRQ(void)
44{
45	m68k_setup_user_interrupt(VEC_USER + 96, 16);
46	m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
47				  IRQ_APOLLO, 16);
48}