Annotation of sys/dev/radio.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: radio.c,v 1.7 2006/06/23 06:27:11 miod Exp $ */
2: /* $RuOBSD: radio.c,v 1.7 2001/12/04 06:03:05 tm Exp $ */
3:
4: /*
5: * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29: /* This is /dev/radio driver for OpenBSD */
30:
31: #include <sys/param.h>
32: #include <sys/systm.h>
33: #include <sys/proc.h>
34: #include <sys/errno.h>
35: #include <sys/ioctl.h>
36: #include <sys/fcntl.h>
37: #include <sys/device.h>
38: #include <sys/vnode.h>
39: #include <sys/radioio.h>
40: #include <sys/conf.h>
41:
42: #include <dev/audio_if.h>
43: #include <dev/radio_if.h>
44: #include <dev/radiovar.h>
45:
46: int radioprobe(struct device *, void *, void *);
47: void radioattach(struct device *, struct device *, void *);
48: int radiodetach(struct device *, int);
49: int radioactivate(struct device *, enum devact);
50: int radioprint(void *, const char *);
51:
52: struct cfattach radio_ca = {
53: sizeof(struct radio_softc), radioprobe, radioattach,
54: radiodetach, radioactivate
55: };
56:
57: struct cfdriver radio_cd = {
58: NULL, "radio", DV_DULL
59: };
60:
61: int
62: radioprobe(struct device *parent, void *match, void *aux)
63: {
64: struct audio_attach_args *sa = aux;
65: return (sa->type == AUDIODEV_TYPE_RADIO) ? 1 : 0;
66: }
67:
68: void
69: radioattach(struct device *parent, struct device *self, void *aux)
70: {
71: struct radio_softc *sc = (void *) self;
72: struct audio_attach_args *sa = aux;
73:
74: printf("\n");
75: sc->hw_if = sa->hwif;
76: sc->hw_hdl = sa->hdl;
77: sc->sc_dev = parent;
78: }
79:
80: int
81: radioopen(dev_t dev, int flags, int fmt, struct proc *p)
82: {
83: int unit;
84: struct radio_softc *sc;
85:
86: unit = RADIOUNIT(dev);
87: if (unit >= radio_cd.cd_ndevs ||
88: (sc = radio_cd.cd_devs[unit]) == NULL ||
89: sc->hw_if == NULL)
90: return (ENXIO);
91:
92: if (sc->hw_if->open != NULL)
93: return (sc->hw_if->open(sc->hw_hdl, flags, fmt, p));
94: else
95: return (0);
96: }
97:
98: int
99: radioclose(dev_t dev, int flags, int fmt, struct proc *p)
100: {
101: struct radio_softc *sc;
102:
103: sc = radio_cd.cd_devs[RADIOUNIT(dev)];
104:
105: if (sc->hw_if->close != NULL)
106: return (sc->hw_if->close(sc->hw_hdl, flags, fmt, p));
107: else
108: return (0);
109: }
110:
111: int
112: radioioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
113: {
114: struct radio_softc *sc;
115: int unit, error;
116:
117: unit = RADIOUNIT(dev);
118: if (unit >= radio_cd.cd_ndevs ||
119: (sc = radio_cd.cd_devs[unit]) == NULL || sc->hw_if == NULL)
120: return (ENXIO);
121:
122: error = EOPNOTSUPP;
123: switch (cmd) {
124: case RIOCGINFO:
125: if (sc->hw_if->get_info)
126: error = (sc->hw_if->get_info)(sc->hw_hdl,
127: (struct radio_info *)data);
128: break;
129: case RIOCSINFO:
130: if (!(flags & FWRITE))
131: return (EACCES);
132: if (sc->hw_if->set_info)
133: error = (sc->hw_if->set_info)(sc->hw_hdl,
134: (struct radio_info *)data);
135: break;
136: case RIOCSSRCH:
137: if (!(flags & FWRITE))
138: return (EACCES);
139: if (sc->hw_if->search)
140: error = (sc->hw_if->search)(sc->hw_hdl,
141: *(int *)data);
142: break;
143: default:
144: error = (ENOTTY);
145: }
146:
147: return (error);
148: }
149:
150: /*
151: * Called from hardware driver. This is where the MI radio driver gets
152: * probed/attached to the hardware driver
153: */
154:
155: struct device *
156: radio_attach_mi(struct radio_hw_if *rhwp, void *hdlp, struct device *dev)
157: {
158: struct audio_attach_args arg;
159:
160: arg.type = AUDIODEV_TYPE_RADIO;
161: arg.hwif = rhwp;
162: arg.hdl = hdlp;
163: return (config_found(dev, &arg, radioprint));
164: }
165:
166: int
167: radioprint(void *aux, const char *pnp)
168: {
169: if (pnp != NULL)
170: printf("radio at %s", pnp);
171: return (UNCONF);
172: }
173:
174: int
175: radiodetach(struct device *self, int flags)
176: {
177: /*struct radio_softc *sc = (struct radio_softc *)self;*/
178: int maj, mn;
179:
180: /* locate the major number */
181: for (maj = 0; maj < nchrdev; maj++)
182: if (cdevsw[maj].d_open == radioopen)
183: break;
184:
185: /* Nuke the vnodes for any open instances (calls close). */
186: mn = self->dv_unit;
187: vdevgone(maj, mn, mn, VCHR);
188:
189: return (0);
190: }
191:
192: int
193: radioactivate(struct device *self, enum devact act)
194: {
195: struct radio_softc *sc = (struct radio_softc *)self;
196:
197: switch (act) {
198: case DVACT_ACTIVATE:
199: break;
200:
201: case DVACT_DEACTIVATE:
202: sc->sc_dying = 1;
203: break;
204: }
205: return (0);
206: }
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