ihndlr.c

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00001 /*
00002  * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved.
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  *
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the copyright holders nor the names of
00014  *    contributors may be used to endorse or promote products derived
00015  *    from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
00018  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00019  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00020  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
00021  * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00022  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00023  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
00024  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
00025  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00026  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00027  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00028  * SUCH DAMAGE.
00029  *
00030  * For additional information see http://www.ethernut.de/
00031  *
00032  */
00033 
00034 /*
00035  * $Log: ihndlr.c,v $
00036  * Revision 1.6  2006/10/08 16:48:09  haraldkipp
00037  * Documentation fixed
00038  *
00039  * Revision 1.5  2006/01/05 16:51:54  haraldkipp
00040  * NutIrqSetPriority() didn't correctly return the previous priority. This
00041  * bug has been fixed.
00042  * New function NutIrqSetMode() allows to modify the interrupt modes.
00043  *
00044  * Revision 1.4  2005/10/24 10:17:24  haraldkipp
00045  * New API functions added to create platform independant drivers.
00046  * Interrupt counting requires NUT_PERFMON to be defined.
00047  *
00048  * Revision 1.3  2005/08/02 17:46:47  haraldkipp
00049  * Major API documentation update.
00050  *
00051  * Revision 1.2  2005/07/26 16:30:58  haraldkipp
00052  * Copyright added.
00053  * Temporarily exclude NutRegisterIrqHandler() from Linux builds.
00054  *
00055  */
00056 
00057 #include <sys/atom.h>
00058 #include <dev/irqreg.h>
00059 
00064 
00068 void CallHandler(IRQ_HANDLER * irh)
00069 {
00070 #ifdef NUT_PERFMON
00071     irh->ir_count++;
00072 #endif
00073     if (irh->ir_handler)
00074         (irh->ir_handler) (irh->ir_arg);
00075 }
00076 
00091 #if !defined (__linux__) && !defined(__APPLE__) && !defined(__CYGWIN__)
00092 int NutRegisterIrqHandler(IRQ_HANDLER * irq, void (*handler) (void *), void *arg)
00093 {
00094     int rc = 0;
00095 
00096     /* Initialize this interrupt. */
00097     if (irq->ir_ctl) {
00098         rc = (irq->ir_ctl) (NUT_IRQCTL_INIT, NULL);
00099     }
00100 
00101     /* Set the interrupt handler. */
00102     irq->ir_arg = arg;
00103     irq->ir_handler = handler;
00104 
00105     return rc;
00106 }
00107 
00115 int NutIrqEnable(IRQ_HANDLER * irq)
00116 {
00117     int rc = -1;
00118 
00119     if (irq->ir_ctl) {
00120         rc = (irq->ir_ctl) (NUT_IRQCTL_ENABLE, NULL);
00121     }
00122     return rc;
00123 }
00124 
00132 int NutIrqDisable(IRQ_HANDLER * irq)
00133 {
00134     int rc = -1;
00135 
00136     if (irq->ir_ctl) {
00137         rc = (irq->ir_ctl) (NUT_IRQCTL_DISABLE, NULL);
00138     }
00139     return rc;
00140 }
00141 
00157 int NutIrqSetPriority(IRQ_HANDLER * irq, int level)
00158 {
00159     int rc = -1;
00160 
00161     if (irq->ir_ctl) {
00162         int prev;
00163 
00164         rc = (irq->ir_ctl) (NUT_IRQCTL_GETPRIO, &prev);
00165         if (rc == 0 && (rc = (irq->ir_ctl) (NUT_IRQCTL_SETPRIO, &level)) == 0) {
00166             rc = prev;
00167         }
00168     }
00169     return rc;
00170 }
00171 
00187 int NutIrqSetMode(IRQ_HANDLER * irq, int mode)
00188 {
00189     int rc = -1;
00190 
00191     if (irq->ir_ctl) {
00192         int prev;
00193 
00194         rc = (irq->ir_ctl) (NUT_IRQCTL_GETMODE, &prev);
00195         if (rc == 0 && (rc = (irq->ir_ctl) (NUT_IRQCTL_SETMODE, &mode)) == 0) {
00196             rc = prev;
00197         }
00198     }
00199     return rc;
00200 }
00201 
00202 #endif
00203 

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