1 | /* $NetBSD: radio.c,v 1.27 2014/07/25 08:10:35 dholland Exp $ */ |
2 | /* $OpenBSD: radio.c,v 1.2 2001/12/05 10:27:06 mickey Exp $ */ |
3 | /* $RuOBSD: radio.c,v 1.7 2001/12/04 06:03:05 tm Exp $ */ |
4 | |
5 | /* |
6 | * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net> |
7 | * All rights reserved. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
29 | |
30 | /* This is the /dev/radio driver from OpenBSD */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: radio.c,v 1.27 2014/07/25 08:10:35 dholland Exp $" ); |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> |
37 | #include <sys/proc.h> |
38 | #include <sys/errno.h> |
39 | #include <sys/ioctl.h> |
40 | #include <sys/device.h> |
41 | #include <sys/vnode.h> |
42 | #include <sys/radioio.h> |
43 | #include <sys/conf.h> |
44 | |
45 | #include <dev/radio_if.h> |
46 | |
47 | struct radio_softc { |
48 | void *hw_hdl; /* hardware driver handle */ |
49 | device_t sc_dev; /* hardware device struct */ |
50 | const struct radio_hw_if *hw_if; /* hardware interface */ |
51 | }; |
52 | |
53 | static int radioprobe(device_t, cfdata_t, void *); |
54 | static void radioattach(device_t, device_t, void *); |
55 | static int radioprint(void *, const char *); |
56 | static int radiodetach(device_t, int); |
57 | |
58 | CFATTACH_DECL_NEW(radio, sizeof(struct radio_softc), |
59 | radioprobe, radioattach, radiodetach, NULL); |
60 | |
61 | static dev_type_open(radioopen); |
62 | static dev_type_close(radioclose); |
63 | static dev_type_ioctl(radioioctl); |
64 | |
65 | const struct cdevsw radio_cdevsw = { |
66 | .d_open = radioopen, |
67 | .d_close = radioclose, |
68 | .d_read = noread, |
69 | .d_write = nowrite, |
70 | .d_ioctl = radioioctl, |
71 | .d_stop = nostop, |
72 | .d_tty = notty, |
73 | .d_poll = nopoll, |
74 | .d_mmap = nommap, |
75 | .d_kqfilter = nokqfilter, |
76 | .d_discard = nodiscard, |
77 | .d_flag = D_OTHER, |
78 | }; |
79 | |
80 | extern struct cfdriver radio_cd; |
81 | |
82 | static int |
83 | radioprobe(device_t parent, cfdata_t match, void *aux) |
84 | { |
85 | return (1); |
86 | } |
87 | |
88 | static void |
89 | radioattach(device_t parent, device_t self, void *aux) |
90 | { |
91 | struct radio_softc *sc = device_private(self); |
92 | struct radio_attach_args *sa = aux; |
93 | const struct radio_hw_if *hwp = sa->hwif; |
94 | void *hdlp = sa->hdl; |
95 | |
96 | aprint_naive("\n" ); |
97 | aprint_normal("\n" ); |
98 | sc->hw_if = hwp; |
99 | sc->hw_hdl = hdlp; |
100 | sc->sc_dev = self; |
101 | } |
102 | |
103 | static int |
104 | radioopen(dev_t dev, int flags, int fmt, struct lwp *l) |
105 | { |
106 | int unit; |
107 | struct radio_softc *sc; |
108 | |
109 | unit = RADIOUNIT(dev); |
110 | sc = device_lookup_private(&radio_cd, unit); |
111 | if (sc == NULL || sc->hw_if == NULL) |
112 | return (ENXIO); |
113 | |
114 | if (sc->hw_if->open != NULL) |
115 | return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc)); |
116 | else |
117 | return (0); |
118 | } |
119 | |
120 | static int |
121 | radioclose(dev_t dev, int flags, int fmt, struct lwp *l) |
122 | { |
123 | struct radio_softc *sc; |
124 | |
125 | sc = device_lookup_private(&radio_cd, RADIOUNIT(dev)); |
126 | |
127 | if (sc->hw_if->close != NULL) |
128 | return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc)); |
129 | else |
130 | return (0); |
131 | } |
132 | |
133 | static int |
134 | radioioctl(dev_t dev, u_long cmd, void *data, int flags, |
135 | struct lwp *l) |
136 | { |
137 | struct radio_softc *sc; |
138 | int unit, error; |
139 | |
140 | unit = RADIOUNIT(dev); |
141 | sc = device_lookup_private(&radio_cd, unit); |
142 | if (sc == NULL || sc->hw_if == NULL) |
143 | return (ENXIO); |
144 | |
145 | error = EOPNOTSUPP; |
146 | switch (cmd) { |
147 | case RIOCGINFO: |
148 | if (sc->hw_if->get_info) |
149 | error = (sc->hw_if->get_info)(sc->hw_hdl, |
150 | (struct radio_info *)data); |
151 | break; |
152 | case RIOCSINFO: |
153 | if (sc->hw_if->set_info) |
154 | error = (sc->hw_if->set_info)(sc->hw_hdl, |
155 | (struct radio_info *)data); |
156 | break; |
157 | case RIOCSSRCH: |
158 | if (sc->hw_if->search) |
159 | error = (sc->hw_if->search)(sc->hw_hdl, |
160 | *(int *)data); |
161 | break; |
162 | default: |
163 | error = EINVAL; |
164 | } |
165 | |
166 | return (error); |
167 | } |
168 | |
169 | /* |
170 | * Called from hardware driver. This is where the MI radio driver gets |
171 | * probed/attached to the hardware driver |
172 | */ |
173 | device_t |
174 | radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, device_t dev) |
175 | { |
176 | struct radio_attach_args arg; |
177 | |
178 | arg.hwif = rhwp; |
179 | arg.hdl = hdlp; |
180 | return (config_found(dev, &arg, radioprint)); |
181 | } |
182 | |
183 | static int |
184 | radioprint(void *aux, const char *pnp) |
185 | { |
186 | if (pnp != NULL) |
187 | aprint_normal("radio at %s" , pnp); |
188 | return (UNCONF); |
189 | } |
190 | |
191 | static int |
192 | radiodetach(device_t self, int flags) |
193 | { |
194 | int maj, mn; |
195 | |
196 | /* locate the major number */ |
197 | maj = cdevsw_lookup_major(&radio_cdevsw); |
198 | |
199 | /* Nuke the vnodes for any open instances (calls close). */ |
200 | mn = device_unit(self); |
201 | vdevgone(maj, mn, mn, VCHR); |
202 | |
203 | return (0); |
204 | } |
205 | |