| 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 | |