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      1 /*	$NetBSD: at91aicvar.h,v 1.5 2012/11/12 18:00:36 skrll Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Embedtronics Oy
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
     20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _AT91AICVAR_H_
     30 #define _AT91AICVAR_H_
     31 
     32 struct intrhand {
     33 	TAILQ_ENTRY(intrhand) ih_list;	/* link on intrq list */
     34 	int (*ih_func)(void *);		/* interrupt handler */
     35 	void *ih_arg;			/* arg for handler */
     36 	int ih_ipl;			/* IPL_* */
     37 	int ih_irq;			/* IRQ number */
     38 };
     39 
     40 #define	IRQNAMESIZE	sizeof("aic irq xxx")
     41 
     42 struct intrq {
     43 	TAILQ_HEAD(, intrhand) iq_list;	/* handler list */
     44 	struct evcnt iq_ev;		/* event counter */
     45 	uint32_t iq_levels;		/* IPL_*'s this IRQ has */
     46 	char iq_name[IRQNAMESIZE];	/* interrupt name */
     47 	int iq_type;			/* interrupt request type: */
     48 #define	_INTR_LOW_LEVEL		1		/* interrupt when signal at low level */
     49 #define	INTR_HIGH_LEVEL		2		/* interrupt when signal at high level */
     50 #define	INTR_FALLING_EDGE	4		/* interrupt on falling edge */
     51 #define	INTR_RISING_EDGE	8		/* interrupt on rising edge */
     52 #define	INTR_MASK		0xF
     53 	volatile int iq_busy;		/* set if irq is busy */
     54 };
     55 
     56 void at91aic_init(void);
     57 void *at91aic_intr_establish(int irq, int ipl, int type, int (*ih_func)(void *), void *arg);
     58 void at91aic_intr_disestablish(void *cookie);
     59 void at91aic_intr_poll(void *ihp, int flags);
     60 void at91aic_intr_dispatch(struct trapframe *frame);
     61 
     62 #endif /* _AT91AICVAR_H_ */
     63