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/ic/aic77xx.c

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    1 /*      $NetBSD: aic77xx.c,v 1.6 2005/12/11 12:21:25 christos Exp $     */
    2 
    3 /*
    4  * Common routines for AHA-27/284X and aic7770 motherboard SCSI controllers.
    5  *
    6  * Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs.
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice immediately at the beginning of the file, without modification,
   14  *    this list of conditions, and the following disclaimer.
   15  * 2. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   22  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD: src/sys/dev/aic7xxx/ahc_eisa.c,v 1.15 2000/01/29 14:22:19 peter Exp $
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __KERNEL_RCSID(0, "$NetBSD: aic77xx.c,v 1.6 2005/12/11 12:21:25 christos Exp $");
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/device.h>
   39 
   40 #include <machine/bus.h>
   41 #include <machine/intr.h>
   42 
   43 #include <dev/scsipi/scsi_all.h>
   44 #include <dev/scsipi/scsipi_all.h>
   45 #include <dev/scsipi/scsiconf.h>
   46 
   47 #include <dev/ic/aic7xxx_osm.h>
   48 #include <dev/ic/aic7xxx_inline.h>
   49 #include <dev/ic/aic77xxreg.h>
   50 #include <dev/ic/aic77xxvar.h>
   51 
   52 /*
   53  * Return irq setting of the board, otherwise -1.
   54  */
   55 int
   56 ahc_aic77xx_irq(iot, ioh)
   57         bus_space_tag_t iot;
   58         bus_space_handle_t ioh;
   59 {
   60         int irq;
   61         u_int8_t intdef;
   62         u_int8_t hcntrl;
   63 
   64         /* Pause the card preseving the IRQ type */
   65         hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
   66         bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
   67 
   68         intdef = bus_space_read_1(iot, ioh, INTDEF);
   69         irq = (intdef & INTDEF_IRQ_MASK);
   70         switch (irq) {
   71         case 9:
   72         case 10:
   73         case 11:
   74         case 12:
   75         case 14:
   76         case 15:
   77                 break;
   78         default:
   79                 printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
   80                 return (-1);
   81         }
   82 
   83         return (irq);
   84 }
   85 
   86 int
   87 ahc_aic77xx_attach(ahc)
   88         struct ahc_softc *ahc;
   89 {
   90         u_int8_t sblkctl;
   91         u_int8_t sblkctl_orig;
   92         u_int8_t hostconf;
   93 
   94         /*
   95          * See if we have a Rev E or higher aic7770. Anything below a
   96          * Rev E will have a R/O autoflush disable configuration bit.
   97          */
   98         sblkctl_orig = ahc_inb(ahc, SBLKCTL);
   99         sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
  100         ahc_outb(ahc, SBLKCTL, sblkctl);
  101         sblkctl = ahc_inb(ahc, SBLKCTL);
  102         if (sblkctl != sblkctl_orig) {
  103                 printf("%s: aic7770 >= Rev E: R/O autoflush enabled\n",
  104                     ahc_name(ahc));
  105                 /*
  106                  * Ensure autoflush is enabled
  107                  */
  108                 sblkctl &= ~AUTOFLUSHDIS;
  109                 ahc_outb(ahc, SBLKCTL, sblkctl);
  110         }
  111 
  112         /* Setup the FIFO threshold and the bus off time */
  113         hostconf = ahc_inb(ahc, HOSTCONF);
  114         ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
  115         ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
  116 
  117         /*
  118          * Generic aic7xxx initialization.
  119          */
  120         if (ahc_init(ahc)) {
  121                 /*
  122                  * The board's IRQ line is not yet enabled so it's safe
  123                  * to release the irq.
  124                  */
  125                 return (ENXIO);
  126         }
  127 
  128         /*
  129          * Enable the board's BUS drivers
  130          */
  131         ahc_outb(ahc, BCTL, ENABLE);
  132 
  133         /* Attach sub-devices - always succeeds */
  134         ahc_attach(ahc);
  135 
  136         return 0;
  137 }

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