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/* $OpenBSD: uba_mainbus.c,v 1.3 2003/06/02 23:27:58 millert Exp $ */
/* $NetBSD: uba_mainbus.c,v 1.2 1999/06/06 19:00:53 ragge Exp $ */
/*
* Copyright (c) 1996 Jonathan Stone.
* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
* Copyright (c) 1982, 1986 The Regents of the University of California.
* 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, 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)uba.c 7.10 (Berkeley) 12/16/90
* @(#)autoconf.c 7.20 (Berkeley) 5/9/91
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#define _VAX_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/mtpr.h>
#include <machine/nexus.h>
#include <machine/cpu.h>
#include <machine/sgmap.h>
#include <arch/vax/qbus/ubavar.h>
#include <arch/vax/uba/uba_common.h>
/* Some Qbus-specific defines */
#define QBASIZE (8192 * VAX_NBPG)
#define QBAMAP 0x20088000
#define QIOPAGE 0x20000000
/*
* The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems.
* It has an address space of 4MB (22 address bits), therefore the name,
* and is hardware compatible with all 16 and 18 bits Q-bus devices.
*/
static int qba_match(struct device *, struct cfdata *, void *);
static void qba_attach(struct device *, struct device *, void *);
static void qba_beforescan(struct uba_softc*);
static void qba_init(struct uba_softc*);
struct cfattach uba_mainbus_ca = {
sizeof(struct uba_vsoftc), qba_match, qba_attach
};
extern struct vax_bus_space vax_mem_bus_space;
int
qba_match(parent, vcf, aux)
struct device *parent;
struct cfdata *vcf;
void *aux;
{
struct bp_conf *bp = aux;
if (strcmp(bp->type, "uba"))
return 0;
return 1;
}
void
qba_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct uba_vsoftc *sc = (void *)self;
printf(": Q22\n");
/*
* Fill in bus specific data.
*/
sc->uv_sc.uh_beforescan = qba_beforescan;
sc->uv_sc.uh_ubainit = qba_init;
sc->uv_sc.uh_iot = &vax_mem_bus_space;
sc->uv_sc.uh_dmat = &sc->uv_dmat;
/*
* Fill in variables used by the sgmap system.
*/
sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */
sc->uv_addr = QBAMAP; /* Physical address of map registers */
uba_dma_init(sc);
uba_attach(&sc->uv_sc, QIOPAGE);
}
/*
* Called when the QBA is set up; to enable DMA access from
* QBA devices to main memory.
*/
void
qba_beforescan(sc)
struct uba_softc *sc;
{
#define QIPCR 0x1f40
#define Q_LMEAE 0x20
bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE);
}
void
qba_init(sc)
struct uba_softc *sc;
{
mtpr(0, PR_IUR);
DELAY(500000);
qba_beforescan(sc);
}
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