NetBSD/sys/dev/ic/aic77xx.c

139 lines
3.7 KiB
C

/* $NetBSD: aic77xx.c,v 1.1 2000/03/15 02:06:18 fvdl Exp $ */
/*
* Common routines for AHA-27/284X and aic7770 motherboard SCSI controllers.
*
* Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/dev/aic7xxx/ahc_eisa.c,v 1.15 2000/01/29 14:22:19 peter Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/microcode/aic7xxx/aic7xxx_reg.h>
#include <dev/ic/aic7xxxvar.h>
#include <dev/ic/aic77xxreg.h>
#include <dev/ic/aic77xxvar.h>
/*
* Return irq setting of the board, otherwise -1.
*/
int
ahc_aic77xx_irq(iot, ioh)
bus_space_tag_t iot;
bus_space_handle_t ioh;
{
int irq;
u_int8_t intdef;
u_int8_t hcntrl;
/* Pause the card preseving the IRQ type */
hcntrl = bus_space_read_1(iot, ioh, HCNTRL) & IRQMS;
bus_space_write_1(iot, ioh, HCNTRL, hcntrl | PAUSE);
intdef = bus_space_read_1(iot, ioh, INTDEF);
irq = (intdef & INTDEF_IRQ_MASK);
switch (irq) {
case 9:
case 10:
case 11:
case 12:
case 14:
case 15:
break;
default:
printf("ahc_aic77xx_irq: illegal irq setting %d\n", intdef);
return (-1);
}
return (irq);
}
int
ahc_aic77xx_attach(ahc)
struct ahc_softc *ahc;
{
char *id_string;
u_int8_t sblkctl;
u_int8_t sblkctl_orig;
u_int8_t hostconf;
/*
* See if we have a Rev E or higher aic7770. Anything below a
* Rev E will have a R/O autoflush disable configuration bit.
*/
sblkctl_orig = ahc_inb(ahc, SBLKCTL);
sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
ahc_outb(ahc, SBLKCTL, sblkctl);
sblkctl = ahc_inb(ahc, SBLKCTL);
if (sblkctl != sblkctl_orig) {
id_string = "aic7770 >= Rev E, ";
/*
* Ensure autoflush is enabled
*/
sblkctl &= ~AUTOFLUSHDIS;
ahc_outb(ahc, SBLKCTL, sblkctl);
} else
id_string = "aic7770 <= Rev C, ";
printf("%s: %s", ahc_name(ahc), id_string);
/* Setup the FIFO threshold and the bus off time */
hostconf = ahc_inb(ahc, HOSTCONF);
ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
/*
* Generic aic7xxx initialization.
*/
if (ahc_init(ahc)) {
/*
* The board's IRQ line is not yet enabled so it's safe
* to release the irq.
*/
return (ENXIO);
}
/*
* Enable the board's BUS drivers
*/
ahc_outb(ahc, BCTL, ENABLE);
/* Attach sub-devices - always succeeds */
ahc_attach(ahc);
return 0;
}