1 /* $NetBSD: bha_isa.c,v 1.37 2016/07/14 04:19:27 msaitoh 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 1.37 2016/07/14 04:19:27 msaitoh 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
53 int bha_isa_probe(device_t, cfdata_t, void *);
54 void bha_isa_attach(device_t, device_t, void *);
55
56 CFATTACH_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 its address (slot) and call
62 * the actual probe routine to check it out.
63 */
64 int
bha_isa_probe(device_t parent,cfdata_t match,void * aux)65 bha_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 */
119 void
bha_isa_attach(device_t parent,device_t self,void * aux)120 bha_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,
150 " unable to cascade DRQ, error = %d\n", error);
151 return;
152 }
153 } else {
154 /*
155 * We have a VLB controller. If we're at least both
156 * hardware revision E and firmware revision 3.37,
157 * we can do 32-bit DMA (earlier revisions are buggy
158 * in this regard).
159 */
160 (void) bha_info(sc);
161 if (strcmp(sc->sc_firmware, "3.37") < 0)
162 printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
163 device_xname(sc->sc_dev));
164 else
165 sc->sc_dmaflags = ISABUS_DMA_32BIT;
166 }
167
168 sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
169 bha_intr, sc);
170 if (sc->sc_ih == NULL) {
171 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt\n");
172 return;
173 }
174
175 bha_attach(sc);
176 }
177