The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/aic/aic_isa.c

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    1 /*-
    2  * Copyright (c) 1999 Luoqi Chen.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: stable/3/sys/dev/aic/aic_isa.c 52491 1999-10-25 19:11:44Z luoqi $
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/kernel.h>
   32 #include <sys/module.h>
   33 #include <sys/bus.h>
   34 
   35 #include <machine/bus_pio.h>
   36 #include <machine/bus.h>
   37  
   38 #include <i386/isa/isa_device.h>
   39 #include <dev/aic/aic6360reg.h>
   40 #include <dev/aic/aicvar.h>
   41   
   42 static int aic_isa_probe __P((struct isa_device *dev));
   43 static int aic_isa_attach __P((struct isa_device *dev));
   44 static void aic_isa_intr __P((void *arg));
   45 
   46 static u_int aic_isa_ports[] = { 0x340, 0x140 };
   47 #define AIC_ISA_NUMPORTS (sizeof(aic_isa_ports) / sizeof(aic_isa_ports[0]))
   48 #define AIC_ISA_PORTSIZE 0x20
   49 
   50 static int
   51 aic_isa_probe(struct isa_device *dev)
   52 {
   53         struct aic_softc _aic, *aic = &_aic;
   54         int numports, i;
   55         u_int port, *ports;
   56         u_int8_t porta;
   57 
   58         port = dev->id_iobase;
   59         if (port != -1) {
   60                 ports = &port;
   61                 numports = 1;
   62         } else {
   63                 ports = aic_isa_ports;
   64                 numports = AIC_ISA_NUMPORTS;
   65         }
   66 
   67         for (i = 0; i < numports; i++) {
   68                 aic->unit = aic_unit;
   69                 aic->tag = I386_BUS_SPACE_IO;
   70                 aic->bsh = ports[i];
   71                 if (!aic_probe(aic))
   72                         break;
   73         }
   74 
   75         if (i == numports)
   76                 return (0);
   77 
   78         porta = aic_inb(aic, PORTA);
   79         if (dev->id_irq <= 0)
   80                 dev->id_irq = 1 << PORTA_IRQ(porta);
   81         if ((aic->flags & AIC_DMA_ENABLE) && dev->id_drq == -1)
   82                 dev->id_drq = PORTA_DRQ(porta);
   83         dev->id_iobase = aic->bsh;
   84         dev->id_intr = aic_isa_intr;
   85         dev->id_unit = aic_unit++;
   86         return (AIC_ISA_PORTSIZE);
   87 }
   88 
   89 static int
   90 aic_isa_attach(struct isa_device *dev)
   91 {
   92         struct aic_softc *aic = &aic_softcs[dev->id_unit];
   93 
   94         aic->unit = dev->id_unit;
   95         aic->tag = I386_BUS_SPACE_IO;
   96         aic->bsh = dev->id_iobase;
   97 
   98         return (aic_attach(aic) == 0);
   99 }
  100 
  101 static void
  102 aic_isa_intr(void *arg)
  103 {
  104         aic_intr((void *)&aic_softcs[(int)arg]);
  105 }
  106 
  107 struct isa_driver aicdriver = {
  108         aic_isa_probe,
  109         aic_isa_attach,
  110         "aic"
  111 };

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