aic77xx.c

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    1 /*      $NetBSD: aic77xx.c,v 1.8 2009/03/14 15:36:17 dsl 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 1.8 2009/03/14 15:36:17 dsl Exp $");
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/device.h>
   39 
   40 #include <sys/bus.h>
   41 #include <sys/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(bus_space_tag_t iot, bus_space_handle_t ioh)
   57 {
   58         int irq;
   59         u_int8_t intdef;
   60         u_int8_t hcntrl;
   61 
   62         /* Pause the card preseving the IRQ type */
   63         hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
   64         bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
   65 
   66         intdef = bus_space_read_1(iot, ioh, INTDEF);
   67         irq = (intdef & INTDEF_IRQ_MASK);
   68         switch (irq) {
   69         case 9:
   70         case 10:
   71         case 11:
   72         case 12:
   73         case 14:
   74         case 15:
   75                 break;
   76         default:
   77                 printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
   78                 return (-1);
   79         }
   80 
   81         return (irq);
   82 }
   83 
   84 int
   85 ahc_aic77xx_attach(struct ahc_softc *ahc)
   86 {
   87         u_int8_t sblkctl;
   88         u_int8_t sblkctl_orig;
   89         u_int8_t hostconf;
   90 
   91         /*
   92          * See if we have a Rev E or higher aic7770. Anything below a
   93          * Rev E will have a R/O autoflush disable configuration bit.
   94          */
   95         sblkctl_orig = ahc_inb(ahc, SBLKCTL);
   96         sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
   97         ahc_outb(ahc, SBLKCTL, sblkctl);
   98         sblkctl = ahc_inb(ahc, SBLKCTL);
   99         if (sblkctl != sblkctl_orig) {
  100                 printf("%s: aic7770 >= Rev E: R/O autoflush enabled\n",
  101                     ahc_name(ahc));
  102                 /*
  103                  * Ensure autoflush is enabled
  104                  */
  105                 sblkctl &= ~AUTOFLUSHDIS;
  106                 ahc_outb(ahc, SBLKCTL, sblkctl);
  107         }
  108 
  109         /* Setup the FIFO threshold and the bus off time */
  110         hostconf = ahc_inb(ahc, HOSTCONF);
  111         ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
  112         ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
  113 
  114         /*
  115          * Generic aic7xxx initialization.
  116          */
  117         if (ahc_init(ahc)) {
  118                 /*
  119                  * The board's IRQ line is not yet enabled so it's safe
  120                  * to release the irq.
  121                  */
  122                 return (ENXIO);
  123         }
  124 
  125         /*
  126          * Enable the board's BUS drivers
  127          */
  128         ahc_outb(ahc, BCTL, ENABLE);
  129 
  130         /* Attach sub-devices - always succeeds */
  131         ahc_attach(ahc);
  132 
  133         return 0;
  134 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ic/aic77xx.c

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sys/dev/ic/aic77xx.c