arch/mips/lemote/lm2e/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  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  */
  30 #include <linux/errno.h>
  31 #include <linux/init.h>
  32 #include <linux/io.h>
  33 #include <linux/types.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/irq.h>
  36
  37 #include <asm/mips-boards/bonito64.h>
  38
  39
  40 static inline void bonito_irq_enable(unsigned int irq)
  41 {
  42         BONITO_INTENSET = (1 << (irq - BONITO_IRQ_BASE));
  43         mmiowb();
  44 }
  45
  46 static inline void bonito_irq_disable(unsigned int irq)
  47 {
  48         BONITO_INTENCLR = (1 << (irq - BONITO_IRQ_BASE));
  49         mmiowb();
  50 }
  51
  52 static struct irq_chip bonito_irq_type = {
  53         .name   = "bonito_irq",
  54         .ack    = bonito_irq_disable,
  55         .mask   = bonito_irq_disable,
  56         .mask_ack = bonito_irq_disable,
  57         .unmask = bonito_irq_enable,
  58 };
  59
  60 static struct irqaction dma_timeout_irqaction = {
  61         .handler        = no_action,
  62         .name           = "dma_timeout",
  63 };
  64
  65 void bonito_irq_init(void)
  66 {
  67         u32 i;
  68
  69         for (i = BONITO_IRQ_BASE; i < BONITO_IRQ_BASE + 32; i++) {
  70                 set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
  71         }
  72
  73         setup_irq(BONITO_IRQ_BASE + 10, &dma_timeout_irqaction);
  74 }