xref: /src/sys/dev/eisa/ahc_eisa.c

/*	$NetBSD: ahc_eisa.c,v 1.17 2000/01/26 06:41:11 thorpej Exp $	*/

/*
 * Product specific probe and attach routines for:
 * 	27/284X and aic7770 motherboard SCSI controllers
 *
 * Copyright (c) 1994, 1995, 1996 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. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. 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.
 *
 * from Id: aic7770.c,v 1.29 1996/05/30 07:18:52 gibbs Exp
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.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/eisa/eisareg.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>

#include <dev/ic/aic7xxxreg.h>
#include <dev/ic/aic7xxxvar.h>

#define AHC_EISA_SLOT_OFFSET	0xc00
#define AHC_EISA_IOSIZE		0x100
#define INTDEF			0x5cul	/* Interrupt Definition Register */

/*
 * Under normal circumstances, these messages are unnecessary
 * and not terribly cosmetic.
 */
#ifdef DEBUG
#define bootverbose	1
#else
#define bootverbose	0
#endif

int	ahc_eisa_irq __P((bus_space_tag_t, bus_space_handle_t));
int	ahc_eisa_match __P((struct device *, struct cfdata *, void *));
void	ahc_eisa_attach __P((struct device *, struct device *, void *));


struct cfattach ahc_eisa_ca = {
	sizeof(struct ahc_data), ahc_eisa_match, ahc_eisa_attach
};

/*
 * Return irq setting of the board, otherwise -1.
 */
int
ahc_eisa_irq(iot, ioh)
	bus_space_tag_t iot;
	bus_space_handle_t ioh;
{
	int irq;
	u_char intdef;

	ahc_reset("ahc_eisa", iot, ioh);
	intdef = bus_space_read_1(iot, ioh, INTDEF);
	switch (irq = (intdef & 0xf)) {
	case 9:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
		break;
	default:
		printf("ahc_eisa_irq: illegal irq setting %d\n", intdef);
		return -1;
	}

	/* Note that we are going and return (to probe) */
	return irq;
}

/*
 * Check the slots looking for a board we recognise
 * If we find one, note it's address (slot) and call
 * the actual probe routine to check it out.
 */
int
ahc_eisa_match(parent, match, aux)
	struct device *parent;
        struct cfdata *match;
        void *aux;
{
	struct eisa_attach_args *ea = aux;
	bus_space_tag_t iot = ea->ea_iot;
	bus_space_handle_t ioh;
	int irq;

	/* must match one of our known ID strings */
	if (strcmp(ea->ea_idstring, "ADP7770") &&
	    strcmp(ea->ea_idstring, "ADP7771")
#if 0
	    && strcmp(ea->ea_idstring, "ADP7756") /* not EISA, but VL */
	    && strcmp(ea->ea_idstring, "ADP7757") /* not EISA, but VL */
#endif
	    )
		return (0);

	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
	    AHC_EISA_SLOT_OFFSET, AHC_EISA_IOSIZE, 0, &ioh))
		return (0);

	irq = ahc_eisa_irq(iot, ioh);

	bus_space_unmap(iot, ioh, AHC_EISA_IOSIZE);

	return (irq >= 0);
}

void
ahc_eisa_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	ahc_type type;
	struct ahc_data *ahc = (void *)self;
	struct eisa_attach_args *ea = aux;
	bus_space_tag_t iot = ea->ea_iot;
	bus_space_handle_t ioh;
	int irq;
	eisa_chipset_tag_t ec = ea->ea_ec;
	eisa_intr_handle_t ih;
	const char *model, *intrstr;

	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
	    AHC_EISA_SLOT_OFFSET, AHC_EISA_IOSIZE, 0, &ioh))
		panic("ahc_eisa_attach: could not map I/O addresses");
	if ((irq = ahc_eisa_irq(iot, ioh)) < 0)
		panic("ahc_eisa_attach: ahc_eisa_irq failed!");

	if (strcmp(ea->ea_idstring, "ADP7770") == 0) {
		model = EISA_PRODUCT_ADP7770;
		type = AHC_AIC7770;
	} else if (strcmp(ea->ea_idstring, "ADP7771") == 0) {
		model = EISA_PRODUCT_ADP7771;
		type = AHC_274;
#if 0
	} else if (strcmp(ea->ea_idstring, "ADP7756") == 0) {
		model = EISA_PRODUCT_ADP7756;
		type = AHC_284;
	} else if (strcmp(ea->ea_idstring, "ADP7757") == 0) {
		model = EISA_PRODUCT_ADP7757;
		type = AHC_284;
#endif
	} else {
		panic("ahc_eisa_attach: Unknown device type %s\n",
		      ea->ea_idstring);
	}
	printf(": %s\n", model);

	ahc_construct(ahc, iot, ioh, ea->ea_dmat, type, AHC_FNONE);
	if (eisa_intr_map(ec, irq, &ih)) {
		printf("%s: couldn't map interrupt (%d)\n",
		    ahc->sc_dev.dv_xname, irq);
		return;
	}

	/*
	 * Tell the user what type of interrupts we're using.
	 * usefull for debugging irq problems
	 */
	if(bootverbose) {
		printf("%s: Using %s Interrupts\n",
		    ahc_name(ahc),
		    ahc->pause & IRQMS ?  "Level Sensitive" : "Edge Triggered");
	}

	/*
	 * Now that we know we own the resources we need, do the
	 * card initialization.
	 *
	 * First, the aic7770 card specific setup.
	 */
	switch( ahc->type ) {
	    case AHC_AIC7770:
	    case AHC_274:
	    {
		u_char biosctrl = AHC_INB(ahc, HA_274_BIOSCTRL);

		/* Get the primary channel information */
		ahc->flags |= (biosctrl & CHANNEL_B_PRIMARY);

		if((biosctrl & BIOSMODE) == BIOSDISABLED)
			ahc->flags |= AHC_USEDEFAULTS;
		break;
	    }
	    case AHC_284:
	    {
		/* XXX
		 * All values are automagically intialized at
		 * POST for these cards, so we can always rely
		 * on the Scratch Ram values.  However, we should
		 * read the SEEPROM here (Dan has the code to do
		 * it) so we can say what kind of translation the
		 * BIOS is using.  Printing out the geometry could
		 * save a lot of users the grief of failed installs.
		 */
		break;
	    }
	    default:
		break;
	}

	/*
	 * See if we have a Rev E or higher aic7770. Anything below a
	 * Rev E will have a R/O autoflush disable configuration bit.
	 * It's still not clear exactly what is differenent about the Rev E.
	 * We think it allows 8 bit entries in the QOUTFIFO to support
	 * "paging" SCBs so you can have more than 4 commands active at
	 * once.
	 */
	{
		char *id_string;
		u_char sblkctl;
		u_char sblkctl_orig;

		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);

			/* Allow paging on this adapter */
			ahc->flags |= AHC_PAGESCBS;
		}
		else
			id_string = "aic7770 <= Rev C, ";

		printf("%s: %s", ahc_name(ahc), id_string);
	}

	/* Setup the FIFO threshold and the bus off time */
	{
		u_char 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)){
		ahc_free(ahc);
		return;
	}

	/*
	 * Enable the board's BUS drivers
	 */
	AHC_OUTB(ahc, BCTL, ENABLE);

	intrstr = eisa_intr_string(ec, ih);
	/*
	 * The IRQMS bit enables level sensitive interrupts only allow
	 * IRQ sharing if its set.
	 */
	ahc->sc_ih = eisa_intr_establish(ec, ih,
	    ahc->pause & IRQMS ? IST_LEVEL : IST_EDGE, IPL_BIO, ahc_intr, ahc);
	if (ahc->sc_ih == NULL) {
		printf("%s: couldn't establish interrupt",
		    ahc->sc_dev.dv_xname);
		if (intrstr != NULL)
			printf(" at %s", intrstr);
		printf("\n");
		ahc_free(ahc);
		return;
	}
	if (intrstr != NULL)
		printf("%s: interrupting at %s\n", ahc->sc_dev.dv_xname,
		       intrstr);

	/* Attach sub-devices - always succeeds */
	ahc_attach(ahc);
}