142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/* $NetBSD: aic77xx.c,v 1.2 2001/11/13 13:14:33 lukem Exp $ */
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/*
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* Common routines for AHA-27/284X and aic7770 motherboard SCSI controllers.
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*
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* Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/sys/dev/aic7xxx/ahc_eisa.c,v 1.15 2000/01/29 14:22:19 peter Exp $
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: aic77xx.c,v 1.2 2001/11/13 13:14:33 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <dev/microcode/aic7xxx/aic7xxx_reg.h>
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#include <dev/ic/aic7xxxvar.h>
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#include <dev/ic/aic77xxreg.h>
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#include <dev/ic/aic77xxvar.h>
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/*
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* Return irq setting of the board, otherwise -1.
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*/
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int
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ahc_aic77xx_irq(iot, ioh)
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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{
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int irq;
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u_int8_t intdef;
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u_int8_t hcntrl;
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/* Pause the card preseving the IRQ type */
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hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
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bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
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intdef = bus_space_read_1(iot, ioh, INTDEF);
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irq = (intdef & INTDEF_IRQ_MASK);
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switch (irq) {
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case 9:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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break;
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default:
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printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
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return (-1);
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}
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return (irq);
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}
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int
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ahc_aic77xx_attach(ahc)
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struct ahc_softc *ahc;
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{
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char *id_string;
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u_int8_t sblkctl;
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u_int8_t sblkctl_orig;
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u_int8_t hostconf;
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/*
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* See if we have a Rev E or higher aic7770. Anything below a
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* Rev E will have a R/O autoflush disable configuration bit.
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*/
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sblkctl_orig = ahc_inb(ahc, SBLKCTL);
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sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
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ahc_outb(ahc, SBLKCTL, sblkctl);
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sblkctl = ahc_inb(ahc, SBLKCTL);
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if (sblkctl != sblkctl_orig) {
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id_string = "aic7770 >= Rev E, ";
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/*
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* Ensure autoflush is enabled
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*/
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sblkctl &= ~AUTOFLUSHDIS;
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ahc_outb(ahc, SBLKCTL, sblkctl);
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} else
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id_string = "aic7770 <= Rev C, ";
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printf("%s: %s", ahc_name(ahc), id_string);
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/* Setup the FIFO threshold and the bus off time */
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hostconf = ahc_inb(ahc, HOSTCONF);
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ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
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ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
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/*
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* Generic aic7xxx initialization.
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*/
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if (ahc_init(ahc)) {
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/*
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* The board's IRQ line is not yet enabled so it's safe
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* to release the irq.
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*/
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return (ENXIO);
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}
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/*
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* Enable the board's BUS drivers
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*/
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ahc_outb(ahc, BCTL, ENABLE);
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/* Attach sub-devices - always succeeds */
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ahc_attach(ahc);
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return 0;
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}
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