treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
[muen/linux.git] / arch / mips / loongson64 / common / bonito-irq.c
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 static struct irqaction __maybe_unused dma_timeout_irqaction = {
34         .handler        = no_action,
35         .name           = "dma_timeout",
36 };
37
38 void bonito_irq_init(void)
39 {
40         u32 i;
41
42         for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
43                 irq_set_chip_and_handler(i, &bonito_irq_type,
44                                          handle_level_irq);
45
46 #ifdef CONFIG_CPU_LOONGSON2E
47         setup_irq(LOONGSON_IRQ_BASE + 10, &dma_timeout_irqaction);
48 #endif
49 }