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
  16 #include <loongson.h>
  17
  18 static inline void bonito_irq_enable(unsigned int irq)
  19 {
  20         BONITO_INTENSET = (1 << (irq - BONITO_IRQ_BASE));
  21         mmiowb();
  22 }
  23
  24 static inline void bonito_irq_disable(unsigned int irq)
  25 {
  26         BONITO_INTENCLR = (1 << (irq - BONITO_IRQ_BASE));
  27         mmiowb();
  28 }
  29
  30 static struct irq_chip bonito_irq_type = {
  31         .name   = "bonito_irq",
  32         .ack    = bonito_irq_disable,
  33         .mask   = bonito_irq_disable,
  34         .mask_ack = bonito_irq_disable,
  35         .unmask = bonito_irq_enable,
  36 };
  37
  38 static struct irqaction dma_timeout_irqaction = {
  39         .handler        = no_action,
  40         .name           = "dma_timeout",
  41 };
  42
  43 void bonito_irq_init(void)
  44 {
  45         u32 i;
  46
  47         for (i = BONITO_IRQ_BASE; i < BONITO_IRQ_BASE + 32; i++)
  48                 set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
  49
  50         setup_irq(BONITO_IRQ_BASE + 10, &dma_timeout_irqaction);
  51 }