bha_isa.c revision 1.35 
1/*	$NetBSD: bha_isa.c,v 1.35 2012/10/27 17:18:24 chs Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: bha_isa.c,v 1.35 2012/10/27 17:18:24 chs Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/device.h>
38
39#include <sys/bus.h>
40#include <sys/intr.h>
41
42#include <dev/scsipi/scsipi_all.h>
43#include <dev/scsipi/scsiconf.h>
44
45#include <dev/isa/isavar.h>
46#include <dev/isa/isadmavar.h>
47
48#include <dev/ic/bhareg.h>
49#include <dev/ic/bhavar.h>
50
51#define	BHA_ISA_IOSIZE	4
52
53int	bha_isa_probe(device_t, cfdata_t, void *);
54void	bha_isa_attach(device_t, device_t, void *);
55
56CFATTACH_DECL_NEW(bha_isa, sizeof(struct bha_softc),
57    bha_isa_probe, bha_isa_attach, NULL, NULL);
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(device_t parent, cfdata_t match, void *aux)
66{
67	struct isa_attach_args *ia = aux;
68	bus_space_tag_t iot = ia->ia_iot;
69	bus_space_handle_t ioh;
70	struct bha_probe_data bpd;
71	int rv;
72
73	if (ia->ia_nio < 1)
74		return (0);
75	if (ia->ia_nirq < 1)
76		return (0);
77	if (ia->ia_ndrq < 1)
78		return (0);
79
80	if (ISA_DIRECT_CONFIG(ia))
81		return (0);
82
83	/* Disallow wildcarded i/o address. */
84	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
85		return (0);
86
87	if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh))
88		return (0);
89
90	rv = bha_probe_inquiry(iot, ioh, &bpd);
91
92	bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);
93
94	if (rv) {
95		if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
96		    ia->ia_irq[0].ir_irq != bpd.sc_irq)
97			return (0);
98		if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ &&
99		    ia->ia_drq[0].ir_drq != bpd.sc_drq)
100			return (0);
101
102		ia->ia_nio = 1;
103		ia->ia_io[0].ir_size = BHA_ISA_IOSIZE;
104
105		ia->ia_nirq = 1;
106		ia->ia_irq[0].ir_irq = bpd.sc_irq;
107
108		ia->ia_ndrq = 1;
109		ia->ia_drq[0].ir_drq = bpd.sc_drq;
110
111		ia->ia_niomem = 0;
112	}
113	return (rv);
114}
115
116/*
117 * Attach all the sub-devices we can find
118 */
119void
120bha_isa_attach(device_t parent, device_t self, void *aux)
121{
122	struct isa_attach_args *ia = aux;
123	struct bha_softc *sc = device_private(self);
124	bus_space_tag_t iot = ia->ia_iot;
125	bus_space_handle_t ioh;
126	struct bha_probe_data bpd;
127	isa_chipset_tag_t ic = ia->ia_ic;
128	int error;
129
130	printf("\n");
131
132	sc->sc_dev = self;
133	if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) {
134		aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
135		return;
136	}
137
138	sc->sc_iot = iot;
139	sc->sc_ioh = ioh;
140	sc->sc_dmat = ia->ia_dmat;
141	if (!bha_probe_inquiry(iot, ioh, &bpd)) {
142		aprint_error_dev(sc->sc_dev, "bha_isa_attach failed\n");
143		return;
144	}
145
146	sc->sc_dmaflags = 0;
147	if (bpd.sc_drq != -1) {
148		if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) {
149			aprint_error_dev(sc->sc_dev, " unable to cascade DRQ, error = %d\n", error);
150			return;
151		}
152	} else {
153		/*
154		 * We have a VLB controller.  If we're at least both
155		 * hardware revision E and firmware revision 3.37,
156		 * we can do 32-bit DMA (earlier revisions are buggy
157		 * in this regard).
158		 */
159		(void) bha_info(sc);
160		if (strcmp(sc->sc_firmware, "3.37") < 0)
161		    printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
162		        device_xname(sc->sc_dev));
163		else
164			sc->sc_dmaflags = ISABUS_DMA_32BIT;
165	}
166
167	sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
168	    bha_intr, sc);
169	if (sc->sc_ih == NULL) {
170		aprint_error_dev(sc->sc_dev, "couldn't establish interrupt\n");
171		return;
172	}
173
174	bha_attach(sc);
175}
176