1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * arch/arm/mach-dove/irq.c
 4 *
 5 * Dove IRQ handling.
 6 */
 7#include <linux/init.h>
 8#include <linux/irq.h>
 9#include <linux/io.h>
10#include <asm/exception.h>
11
12#include <plat/irq.h>
13#include <plat/orion-gpio.h>
14
15#include "pm.h"
16#include "bridge-regs.h"
17#include "common.h"
18
19static int __initdata gpio0_irqs[4] = {
20	IRQ_DOVE_GPIO_0_7,
21	IRQ_DOVE_GPIO_8_15,
22	IRQ_DOVE_GPIO_16_23,
23	IRQ_DOVE_GPIO_24_31,
24};
25
26static int __initdata gpio1_irqs[4] = {
27	IRQ_DOVE_HIGH_GPIO,
28	0,
29	0,
30	0,
31};
32
33static int __initdata gpio2_irqs[4] = {
34	0,
35	0,
36	0,
37	0,
38};
39
40static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
41
42static asmlinkage void
43__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
44{
45	u32 stat;
46
47	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
48	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
49	if (stat) {
50		unsigned int hwirq = 1 + __fls(stat);
51		handle_IRQ(hwirq, regs);
52		return;
53	}
54	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
55	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
56	if (stat) {
57		unsigned int hwirq = 33 + __fls(stat);
58		handle_IRQ(hwirq, regs);
59		return;
60	}
61}
62
63void __init dove_init_irq(void)
64{
65	orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
66	orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
67
68	set_handle_irq(dove_legacy_handle_irq);
69
70	/*
71	 * Initialize gpiolib for GPIOs 0-71.
72	 */
73	orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
74			IRQ_DOVE_GPIO_START, gpio0_irqs);
75
76	orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
77			IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
78
79	orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
80			IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
81}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * arch/arm/mach-dove/irq.c
 4 *
 5 * Dove IRQ handling.
 6 */
 7#include <linux/init.h>
 8#include <linux/irq.h>
 9#include <linux/io.h>
10#include <asm/exception.h>
11
12#include <plat/irq.h>
13#include <plat/orion-gpio.h>
14
15#include "pm.h"
16#include "bridge-regs.h"
17#include "common.h"
18
19static int __initdata gpio0_irqs[4] = {
20	IRQ_DOVE_GPIO_0_7,
21	IRQ_DOVE_GPIO_8_15,
22	IRQ_DOVE_GPIO_16_23,
23	IRQ_DOVE_GPIO_24_31,
24};
25
26static int __initdata gpio1_irqs[4] = {
27	IRQ_DOVE_HIGH_GPIO,
28	0,
29	0,
30	0,
31};
32
33static int __initdata gpio2_irqs[4] = {
34	0,
35	0,
36	0,
37	0,
38};
39
40static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
41
42static asmlinkage void
43__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
44{
45	u32 stat;
46
47	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
48	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
49	if (stat) {
50		unsigned int hwirq = 1 + __fls(stat);
51		handle_IRQ(hwirq, regs);
52		return;
53	}
54	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
55	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
56	if (stat) {
57		unsigned int hwirq = 33 + __fls(stat);
58		handle_IRQ(hwirq, regs);
59		return;
60	}
61}
62
63void __init dove_init_irq(void)
64{
65	orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
66	orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
67
68	set_handle_irq(dove_legacy_handle_irq);
69
70	/*
71	 * Initialize gpiolib for GPIOs 0-71.
72	 */
73	orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
74			IRQ_DOVE_GPIO_START, gpio0_irqs);
75
76	orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
77			IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
78
79	orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
80			IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
81}