bha_isa.c revision 1.13 
1/*	$NetBSD: bha_isa.c,v 1.13 1998/06/25 19:18:05 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1994, 1996, 1997 Charles M. Hannum.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by Charles M. Hannum.
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/types.h>
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/device.h>
36
37#include <machine/bus.h>
38#include <machine/intr.h>
39
40#include <dev/scsipi/scsi_all.h>
41#include <dev/scsipi/scsipi_all.h>
42#include <dev/scsipi/scsiconf.h>
43
44#include <dev/isa/isavar.h>
45#include <dev/isa/isadmavar.h>
46
47#include <dev/ic/bhareg.h>
48#include <dev/ic/bhavar.h>
49
50#define	BHA_ISA_IOSIZE	4
51
52int	bha_isa_probe __P((struct device *, struct cfdata *, void *));
53void	bha_isa_attach __P((struct device *, struct device *, void *));
54
55struct cfattach bha_isa_ca = {
56	sizeof(struct bha_softc), bha_isa_probe, bha_isa_attach
57};
58
59/*
60 * Check the slots looking for a board we recognise
61 * If we find one, note it's address (slot) and call
62 * the actual probe routine to check it out.
63 */
64int
65bha_isa_probe(parent, match, aux)
66	struct device *parent;
67	struct cfdata *match;
68	void *aux;
69{
70	struct isa_attach_args *ia = aux;
71	bus_space_tag_t iot = ia->ia_iot;
72	bus_space_handle_t ioh;
73	struct bha_probe_data bpd;
74	int rv;
75
76	/* Disallow wildcarded i/o address. */
77	if (ia->ia_iobase == ISACF_PORT_DEFAULT)
78		return (0);
79
80	if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh))
81		return (0);
82
83	rv = bha_find(iot, ioh, &bpd);
84
85	bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);
86
87	if (rv) {
88		if (ia->ia_irq != -1 && ia->ia_irq != bpd.sc_irq)
89			return (0);
90		if (ia->ia_drq != -1 && ia->ia_drq != bpd.sc_drq)
91			return (0);
92		ia->ia_irq = bpd.sc_irq;
93		ia->ia_drq = bpd.sc_drq;
94		ia->ia_msize = 0;
95		ia->ia_iosize = BHA_ISA_IOSIZE;
96	}
97	return (rv);
98}
99
100/*
101 * Attach all the sub-devices we can find
102 */
103void
104bha_isa_attach(parent, self, aux)
105	struct device *parent, *self;
106	void *aux;
107{
108	struct isa_attach_args *ia = aux;
109	struct bha_softc *sc = (void *)self;
110	bus_space_tag_t iot = ia->ia_iot;
111	bus_space_handle_t ioh;
112	struct bha_probe_data bpd;
113	isa_chipset_tag_t ic = ia->ia_ic;
114	int error;
115
116	printf("\n");
117
118	if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh)) {
119		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
120		return;
121	}
122
123	sc->sc_iot = iot;
124	sc->sc_ioh = ioh;
125	sc->sc_dmat = ia->ia_dmat;
126	if (!bha_find(iot, ioh, &bpd)) {
127		printf("%s: bha_find failed\n", sc->sc_dev.dv_xname);
128		return;
129	}
130
131	sc->sc_dmaflags = 0;
132	if (bpd.sc_drq != -1) {
133		if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) {
134			printf("%s: unable to cascade DRQ, error = %d\n",
135			    sc->sc_dev.dv_xname, error);
136			return;
137		}
138	} else {
139		/*
140		 * We have a VLB controller.  If we're at least both
141		 * hardware revision E and firmware revision 3.37,
142		 * we can do 32-bit DMA (earlier revisions are buggy
143		 * in this regard).
144		 */
145		bha_inquire_setup_information(sc);
146		if (strcmp(sc->sc_firmware, "3.37") < 0)
147		    printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
148		        sc->sc_dev.dv_xname);
149		else
150			sc->sc_dmaflags = ISABUS_DMA_32BIT;
151	}
152
153	sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
154	    bha_intr, sc);
155	if (sc->sc_ih == NULL) {
156		printf("%s: couldn't establish interrupt\n",
157		    sc->sc_dev.dv_xname);
158		return;
159	}
160
161	bha_attach(sc, &bpd);
162}
163