release/src-rt-6.x/linux/linux-2.6/arch/mips/vr41xx/nec-cmbvr4133/irq.c

   1 /*
   2  * arch/mips/vr41xx/nec-cmbvr4133/irq.c
   3  *
   4  * Interrupt routines for the NEC CMB-VR4133 board.
   5  *
   6  * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com> and
   7  *         Alex Sapkov <asapkov@ru.mvista.com>
   8  *
   9  * 2003-2004 (c) MontaVista, Software, Inc. This file is licensed under
  10  * the terms of the GNU General Public License version 2. This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  *
  14  * Support for NEC-CMBVR4133 in 2.6
  15  * Manish Lachwani (mlachwani@mvista.com)
  16  */
  17 #include <linux/bitops.h>
  18 #include <linux/errno.h>
  19 #include <linux/init.h>
  20 #include <linux/ioport.h>
  21 #include <linux/interrupt.h>
  22
  23 #include <asm/io.h>
  24 #include <asm/i8259.h>
  25 #include <asm/vr41xx/cmbvr4133.h>
  26
  27 extern int vr4133_rockhopper;
  28
  29 static int i8259_get_irq_number(int irq)
  30 {
  31         return i8259_irq();
  32 }
  33
  34 void __init rockhopper_init_irq(void)
  35 {
  36         int i;
  37
  38         if(!vr4133_rockhopper) {
  39                 printk(KERN_ERR "Not a Rockhopper Board \n");
  40                 return;
  41         }
  42
  43         vr41xx_set_irq_trigger(CMBVR41XX_INTC_PIN, TRIGGER_LEVEL, SIGNAL_THROUGH);
  44         vr41xx_set_irq_level(CMBVR41XX_INTC_PIN, LEVEL_HIGH);
  45         vr41xx_cascade_irq(CMBVR41XX_INTC_IRQ, i8259_get_irq_number);
  46 }