bonito-irq.c

linux 内核源代码

/*
 * Copyright 2001 MontaVista Software Inc.
 * Author: Jun Sun, [e-mail] or [e-mail]
 * Copyright (C) 2000, 2001 Ralf Baechle ([e-mail])
 *
 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
 * Author: Fuxin Zhang, [e-mail]
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

#include <asm/mips-boards/bonito64.h>


static inline void bonito_irq_enable(unsigned int irq)
{
	BONITO_INTENSET = (1 << (irq - BONITO_IRQ_BASE));
	mmiowb();
}

static inline void bonito_irq_disable(unsigned int irq)
{
	BONITO_INTENCLR = (1 << (irq - BONITO_IRQ_BASE));
	mmiowb();
}

static struct irq_chip bonito_irq_type = {
	.name	= "bonito_irq",
	.ack	= bonito_irq_disable,
	.mask	= bonito_irq_disable,
	.mask_ack = bonito_irq_disable,
	.unmask	= bonito_irq_enable,
};

static struct irqaction dma_timeout_irqaction = {
	.handler	= no_action,
	.name		= "dma_timeout",
};

void bonito_irq_init(void)
{
	u32 i;

	for (i = BONITO_IRQ_BASE; i < BONITO_IRQ_BASE + 32; i++) {
		set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
	}

	setup_irq(BONITO_IRQ_BASE + 10, &dma_timeout_irqaction);
}