1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright 2001 MontaVista Software Inc.
4  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
5  * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
6  *
7  * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
8  * Author: Fuxin Zhang, zhangfx@lemote.com
9  */
10 #include <linux/interrupt.h>
11 #include <linux/compiler.h>
12 
13 #include <loongson.h>
14 
15 static inline void bonito_irq_enable(struct irq_data *d)
16 {
17 	LOONGSON_INTENSET = (1 << (d->irq - LOONGSON_IRQ_BASE));
18 	mmiowb();
19 }
20 
21 static inline void bonito_irq_disable(struct irq_data *d)
22 {
23 	LOONGSON_INTENCLR = (1 << (d->irq - LOONGSON_IRQ_BASE));
24 	mmiowb();
25 }
26 
27 static struct irq_chip bonito_irq_type = {
28 	.name		= "bonito_irq",
29 	.irq_mask	= bonito_irq_disable,
30 	.irq_unmask	= bonito_irq_enable,
31 };
32 
33 void bonito_irq_init(void)
34 {
35 	u32 i;
36 
37 	for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
38 		irq_set_chip_and_handler(i, &bonito_irq_type,
39 					 handle_level_irq);
40 
41 #ifdef CONFIG_CPU_LOONGSON2E
42 	i = LOONGSON_IRQ_BASE + 10;
43 	if (request_irq(i, no_action, 0, "dma_timeout", NULL))
44 		pr_err("Failed to request irq %d (dma_timeout)\n", i);
45 #endif
46 }
47