release/src-rt-6.x.4708/linux/linux-2.6.36/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(unsigned int irq)
  20 {
  21         LOONGSON_INTENSET = (1 << (irq - LOONGSON_IRQ_BASE));
  22         mmiowb();
  23 }
  24
  25 static inline void bonito_irq_disable(unsigned int irq)
  26 {
  27         LOONGSON_INTENCLR = (1 << (irq - LOONGSON_IRQ_BASE));
  28         mmiowb();
  29 }
  30
  31 static struct irq_chip bonito_irq_type = {
  32         .name   = "bonito_irq",
  33         .ack    = bonito_irq_disable,
  34         .mask   = bonito_irq_disable,
  35         .mask_ack = bonito_irq_disable,
  36         .unmask = bonito_irq_enable,
  37 };
  38
  39 static struct irqaction __maybe_unused dma_timeout_irqaction = {
  40         .handler        = no_action,
  41         .name           = "dma_timeout",
  42 };
  43
  44 void bonito_irq_init(void)
  45 {
  46         u32 i;
  47
  48         for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
  49                 set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
  50
  51 #ifdef CONFIG_CPU_LOONGSON2E
  52         setup_irq(LOONGSON_IRQ_BASE + 10, &dma_timeout_irqaction);
  53 #endif
  54 }