1 /* $NetBSD: fdc_pnpbus.c,v 1.6 2021/07/24 21:31:34 andvar Exp $ */
2
3 /*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour
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_pnpbus.c,v 1.6 2021/07/24 21:31:34 andvar Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/callout.h>
42 #include <sys/device.h>
43 #include <sys/buf.h>
44 #include <sys/queue.h>
45
46 #include <sys/bus.h>
47 #include <machine/intr.h>
48 #include <machine/isa_machdep.h>
49
50 #include <dev/isa/isavar.h>
51 #include <dev/isa/isadmavar.h>
52
53 #include <dev/isa/fdcvar.h>
54
55 #include <prep/pnpbus/pnpbusvar.h>
56
57 static int fdc_pnpbus_match(device_t, cfdata_t, void *);
58 static void fdc_pnpbus_attach(device_t, device_t, void *);
59
60 struct fdc_pnpbus_softc {
61 struct fdc_softc sc_fdc; /* base fdc device */
62
63 bus_space_handle_t sc_baseioh; /* base I/O handle */
64 };
65
66 CFATTACH_DECL2_NEW(fdc_pnpbus, sizeof(struct fdc_pnpbus_softc),
67 fdc_pnpbus_match, fdc_pnpbus_attach, NULL, NULL, NULL, NULL);
68
69 static int
fdc_pnpbus_match(device_t parent,cfdata_t match,void * aux)70 fdc_pnpbus_match(device_t parent, cfdata_t match, void *aux)
71 {
72 struct pnpbus_dev_attach_args *pna = aux;
73 int ret = 0;
74
75 if (strcmp(pna->pna_devid, "PNP0700") == 0)
76 ret = 1;
77
78 if (ret)
79 pnpbus_scan(pna, pna->pna_ppc_dev);
80
81 return ret;
82 }
83
84 static void
fdc_pnpbus_attach(device_t parent,device_t self,void * aux)85 fdc_pnpbus_attach(device_t parent, device_t self, void *aux)
86 {
87 struct fdc_pnpbus_softc *pdc = device_private(self);
88 struct fdc_softc *fdc = &pdc->sc_fdc;
89 struct pnpbus_dev_attach_args *pna = aux;
90 int size, base;
91
92 fdc->sc_dev = self;
93 fdc->sc_ic = pna->pna_ic;
94
95 if (pnpbus_io_map(&pna->pna_res, 0, &fdc->sc_iot, &pdc->sc_baseioh)) {
96 aprint_error_dev(self, "unable to map I/O space\n");
97 return;
98 }
99
100 /*
101 * Start accounting for "odd" pnpbus's. Some probe as 4 ports,
102 * some as 6 and some don't give the ctl port back.
103 */
104
105 if (pnpbus_getioport(&pna->pna_res, 0, &base, &size)) {
106 aprint_error_dev(self, "can't get iobase size\n");
107 return;
108 }
109
110 switch (size) {
111
112 /* Easy case. This matches right up with what the fdc code expects. */
113 case 4:
114 fdc->sc_ioh = pdc->sc_baseioh;
115 break;
116
117 /* Map a subregion so this all lines up with the fdc code. */
118 case 6:
119 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4,
120 &fdc->sc_ioh)) {
121 aprint_error_dev(self,
122 "unable to subregion I/O space\n");
123 return;
124 }
125 break;
126 default:
127 aprint_error_dev(self, "unknown size: %d of io mapping\n", size);
128 return;
129 }
130
131 /*
132 * XXX: This is bad. If the pnpbus claims only 1 I/O range then it's
133 * omitting the controller I/O port. (One has to exist for there to
134 * be a working fdc). Just try and force the mapping in.
135 */
136
137 if (pna->pna_res.numio == 1) {
138 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0,
139 &fdc->sc_fdctlioh)) {
140 aprint_error_dev(self,
141 "unable to force map CTL I/O space\n");
142 return;
143 }
144 } else if (pnpbus_io_map(&pna->pna_res, 1, &fdc->sc_iot,
145 &fdc->sc_fdctlioh)) {
146 aprint_error_dev(self, "unable to map CTL I/O space\n");
147 return;
148 }
149
150 if (pnpbus_getdmachan(&pna->pna_res, 0, &fdc->sc_drq)) {
151 aprint_error_dev(self, "unable to get DMA channel\n");
152 return;
153 }
154
155 if (pna->pna_res.numio == 1)
156 aprint_normal_dev(self,
157 "ctl io %x didn't probe. Forced attach\n", base + size + 1);
158
159 aprint_normal("\n");
160
161 /* The 7043-140 gets the type wrong, so override to edge always */
162 fdc->sc_ih = pnpbus_intr_establish(0, IPL_BIO, IST_EDGE, fdcintr, fdc,
163 &pna->pna_res);
164
165 fdcattach(fdc);
166 }
167