1 /* $NetBSD: fdc_pnpbios.c,v 1.19 2016/07/11 11:31:49 msaitoh Exp $ */
2
3 /*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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 /*
33 * PNPBIOS attachment for the PC Floppy Controller driver.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: fdc_pnpbios.c,v 1.19 2016/07/11 11:31:49 msaitoh Exp $");
38
39
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/callout.h>
44 #include <sys/device.h>
45 #include <sys/buf.h>
46 #include <sys/queue.h>
47
48 #include <sys/bus.h>
49 #include <machine/intr.h>
50
51 #include <dev/isa/isavar.h>
52 #include <dev/isa/isadmavar.h>
53
54 #include <dev/isa/fdcvar.h>
55
56 #include <i386/pnpbios/pnpbiosvar.h>
57
58 int fdc_pnpbios_match(device_t, cfdata_t, void *);
59 void fdc_pnpbios_attach(device_t, device_t, void *);
60
61 struct fdc_pnpbios_softc {
62 struct fdc_softc sc_fdc; /* base fdc device */
63
64 bus_space_handle_t sc_baseioh; /* base I/O handle */
65 };
66
67
68 CFATTACH_DECL_NEW(fdc_pnpbios, sizeof(struct fdc_pnpbios_softc),
69 fdc_pnpbios_match, fdc_pnpbios_attach, NULL, NULL);
70
71 int
fdc_pnpbios_match(device_t parent,cfdata_t match,void * aux)72 fdc_pnpbios_match(device_t parent, cfdata_t match, void *aux)
73 {
74 struct pnpbiosdev_attach_args *aa = aux;
75
76 if (strcmp(aa->idstr, "PNP0700") == 0)
77 return (1);
78
79 return (0);
80 }
81
82 void
fdc_pnpbios_attach(device_t parent,device_t self,void * aux)83 fdc_pnpbios_attach(device_t parent, device_t self, void *aux)
84 {
85 struct fdc_pnpbios_softc *pdc = device_private(self);
86 struct fdc_softc *fdc = &pdc->sc_fdc;
87 struct pnpbiosdev_attach_args *aa = aux;
88 int size, base;
89
90 aprint_normal("\n");
91
92 fdc->sc_dev = self;
93 fdc->sc_ic = aa->ic;
94
95 if (pnpbios_io_map(aa->pbt, aa->resc, 0, &fdc->sc_iot,
96 &pdc->sc_baseioh)) {
97 aprint_error_dev(self, "unable to map I/O space\n");
98 return;
99 }
100
101 /*
102 * Start accounting for "odd" pnpbios's. Some probe as 4 ports,
103 * some as 6 and some don't give the ctl port back.
104 */
105
106 if (pnpbios_getiosize(aa->pbt, aa->resc, 0, &size)) {
107 aprint_error_dev(self, "can't get iobase size\n");
108 return;
109 }
110
111 switch (size) {
112
113 /* Easy case. This matches right up with what the fdc code expects. */
114 case 4:
115 fdc->sc_ioh = pdc->sc_baseioh;
116 break;
117
118 /* Map a subregion so this all lines up with the fdc code. */
119 case 6:
120 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4,
121 &fdc->sc_ioh)) {
122 aprint_error_dev(self,
123 "unable to subregion I/O space\n");
124 return;
125 }
126 break;
127 default:
128 aprint_error_dev(self, "unknown size: %d of io mapping\n",
129 size);
130 return;
131 }
132
133 /*
134 * XXX: This is bad. If the pnpbios claims only 1 I/O range then it's
135 * omitting the controller I/O port. (One has to exist for there to
136 * be a working fdc). Just try and force the mapping in.
137 */
138
139 if (aa->resc->numio == 1) {
140
141 if (pnpbios_getiobase(aa->pbt, aa->resc, 0, 0, &base)) {
142 aprint_error_dev(self, "can't get iobase\n");
143 return;
144 }
145 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0,
146 &fdc->sc_fdctlioh)) {
147 aprint_error_dev(self,
148 "unable to force map CTL I/O space\n");
149 return;
150 }
151 } else if (pnpbios_io_map(aa->pbt, aa->resc, 1, &fdc->sc_iot,
152 &fdc->sc_fdctlioh)) {
153 aprint_error_dev(self, "unable to map CTL I/O space\n");
154 return;
155 }
156
157 if (pnpbios_getdmachan(aa->pbt, aa->resc, 0, &fdc->sc_drq)) {
158 aprint_error_dev(self, "unable to get DMA channel\n");
159 return;
160 }
161
162 pnpbios_print_devres(self, aa);
163 if (aa->resc->numio == 1)
164 aprint_error_dev(self,
165 "ctl io %x didn't probe. Forced attach\n",
166 base + size + 1);
167
168 fdc->sc_ih = pnpbios_intr_establish(aa->pbt, aa->resc, 0, IPL_BIO,
169 fdcintr, fdc);
170
171 fdcattach(fdc);
172 }
173