arch/mips/loongson/common/bonito-irq.c

   1 /*
   2  * Copyright 2001 MontaVista Software Inc.
   3  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
   4  * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
   5  *
   6  * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
   7  * Author: Fuxin Zhang, zhangfx@lemote.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  */
  14 #include <linux/interrupt.h>
  15 #include <linux/compiler.h>
  16
  17 #include <loongson.h>
  18
  19 static inline void bonito_irq_enable(struct irq_data *d)
  20 {
  21         LOONGSON_INTENSET = (1 << (d->irq - LOONGSON_IRQ_BASE));
  22         mmiowb();
  23 }
  24
  25 static inline void bonito_irq_disable(struct irq_data *d)
  26 {
  27         LOONGSON_INTENCLR = (1 << (d->irq - LOONGSON_IRQ_BASE));
  28         mmiowb();
  29 }
  30
  31 static struct irq_chip bonito_irq_type = {
  32         .name           = "bonito_irq",
  33         .irq_mask       = bonito_irq_disable,
  34         .irq_unmask     = bonito_irq_enable,
  35 };
  36
  37 static struct irqaction __maybe_unused dma_timeout_irqaction = {
  38         .handler        = no_action,
  39         .name           = "dma_timeout",
  40 };
  41
  42 void bonito_irq_init(void)
  43 {
  44         u32 i;
  45
  46         for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
  47                 irq_set_chip_and_handler(i, &bonito_irq_type,
  48                                          handle_level_irq);
  49
  50 #ifdef CONFIG_CPU_LOONGSON2E
  51         setup_irq(LOONGSON_IRQ_BASE + 10, &dma_timeout_irqaction);
  52 #endif
  53 }