1 /* $NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill 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 /*-
33 * Copyright (c) 1990 The Regents of the University of California.
34 * All rights reserved.
35 *
36 * This code is derived from software contributed to Berkeley by
37 * Don Ahn.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. Neither the name of the University nor the names of its contributors
48 * may be used to endorse or promote products derived from this software
49 * without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * SUCH DAMAGE.
62 *
63 * @(#)fd.c 7.4 (Berkeley) 5/25/91
64 */
65
66 #include <sys/cdefs.h>
67 __KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $");
68
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/callout.h>
72 #include <sys/device.h>
73 #include <sys/buf.h>
74 #include <sys/queue.h>
75
76 #include <sys/bus.h>
77 #include <sys/intr.h>
78
79 #include <dev/isa/isavar.h>
80 #include <dev/isa/isadmavar.h>
81
82 #include <dev/isa/fdreg.h>
83 #include <dev/isa/fdcvar.h>
84
85 static int fdc_isa_probe(device_t, cfdata_t, void *);
86 static void fdc_isa_attach(device_t, device_t, void *);
87 static int fdc_isa_detach(device_t, int);
88
89 struct fdc_isa_softc {
90 struct fdc_softc sc_fdc; /* base fdc device */
91
92 bus_space_handle_t sc_baseioh; /* base I/O handle */
93 };
94
95 CFATTACH_DECL2_NEW(fdc_isa, sizeof(struct fdc_isa_softc),
96 fdc_isa_probe, fdc_isa_attach, fdc_isa_detach, NULL, NULL, fdc_childdet);
97
98 #ifdef NEWCONFIG
99 void fdc_isa_forceintr(void *);
100 #endif
101
102 static int
fdc_isa_probe(device_t parent,cfdata_t match,void * aux)103 fdc_isa_probe(device_t parent, cfdata_t match, void *aux)
104 {
105 struct isa_attach_args *ia = aux;
106 bus_space_tag_t iot;
107 bus_space_handle_t ioh, ctl_ioh, base_ioh;
108 int rv, iobase;
109
110 iot = ia->ia_iot;
111 rv = 0;
112
113 if (ia->ia_nio < 1)
114 return (0);
115 if (ia->ia_nirq < 1)
116 return (0);
117 if (ia->ia_ndrq < 1)
118 return (0);
119
120 if (ISA_DIRECT_CONFIG(ia))
121 return (0);
122
123 /* Disallow wildcarded I/O addresses. */
124 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
125 return (0);
126
127 /* Don't allow wildcarded IRQ/DRQ. */
128 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
129 return (0);
130
131 if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ)
132 return (0);
133
134 /* ISA chipset tag is required for DMA support. */
135 if (ia->ia_ic == NULL)
136 return (0);
137
138 /* Map the I/O space. */
139 iobase = ia->ia_io[0].ir_addr;
140 if (bus_space_map(iot, iobase, 6 /* FDC_NPORT */, 0, &base_ioh))
141 return (0);
142
143 if (bus_space_subregion(iot, base_ioh, 2, 4, &ioh)) {
144 bus_space_unmap(iot, base_ioh, 6);
145 return (0);
146 }
147
148 if (bus_space_map(iot, iobase + fdctl + 2, 1, 0, &ctl_ioh)) {
149 bus_space_unmap(iot, base_ioh, 6);
150 return (0);
151 }
152
153 /* Not needed for the rest of the probe. */
154 bus_space_unmap(iot, ctl_ioh, 1);
155
156 /* reset */
157 bus_space_write_1(iot, ioh, fdout, 0);
158 delay(100);
159 bus_space_write_1(iot, ioh, fdout, FDO_FRST);
160
161 /* see if it can handle a command */
162 if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
163 goto out;
164 out_fdc(iot, ioh, 0xdf);
165 out_fdc(iot, ioh, 2);
166
167 rv = 1;
168 ia->ia_nio = 1;
169 ia->ia_io[0].ir_size = FDC_NPORT;
170
171 ia->ia_nirq = 1;
172 ia->ia_ndrq = 1;
173
174 ia->ia_niomem = 0;
175
176 out:
177 bus_space_unmap(iot, base_ioh, 6 /* FDC_NPORT */);
178 return (rv);
179 }
180
181 static int
fdc_isa_detach(device_t self,int flags)182 fdc_isa_detach(device_t self, int flags)
183 {
184 int rc;
185 struct fdc_isa_softc *isc = device_private(self);
186 struct fdc_softc *fdc = &isc->sc_fdc;
187
188 if ((rc = fdcdetach(self, flags)) != 0)
189 return rc;
190
191 isa_intr_disestablish(fdc->sc_ic, fdc->sc_ih);
192
193 bus_space_unmap(fdc->sc_iot, fdc->sc_fdctlioh, 1);
194
195 bus_space_unmap(fdc->sc_iot, isc->sc_baseioh, 6 /* FDC_NPORT */);
196
197 return 0;
198 }
199
200 static void
fdc_isa_attach(device_t parent,device_t self,void * aux)201 fdc_isa_attach(device_t parent, device_t self, void *aux)
202 {
203 struct fdc_isa_softc *isc = device_private(self);
204 struct fdc_softc *fdc = &isc->sc_fdc;
205 struct isa_attach_args *ia = aux;
206
207 aprint_naive("\n");
208 aprint_normal("\n");
209
210 fdc->sc_dev = self;
211 fdc->sc_iot = ia->ia_iot;
212 fdc->sc_ic = ia->ia_ic;
213 fdc->sc_drq = ia->ia_drq[0].ir_drq;
214
215 if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr,
216 6 /* FDC_NPORT */, 0, &isc->sc_baseioh)) {
217 aprint_normal_dev(fdc->sc_dev, "unable to map I/O space\n");
218 return;
219 }
220
221 if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4,
222 &fdc->sc_ioh)) {
223 aprint_normal_dev(fdc->sc_dev,
224 "unable to subregion I/O space\n");
225 return;
226 }
227
228 if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr + fdctl + 2, 1, 0,
229 &fdc->sc_fdctlioh)) {
230 aprint_normal_dev(fdc->sc_dev,
231 "unable to map CTL I/O space\n");
232 return;
233 }
234
235 fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
236 IST_EDGE, IPL_BIO, fdcintr, fdc);
237
238 fdcattach(fdc);
239 }
240