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 }