dtv_device.c revision 1.5
1 /* $NetBSD: dtv_device.c,v 1.5 2011/07/13 22:43:04 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jared D. McNeill. 18 * 4. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: dtv_device.c,v 1.5 2011/07/13 22:43:04 jmcneill Exp $"); 37 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/atomic.h> 42 #include <sys/module.h> 43 #include <sys/poll.h> 44 #include <sys/select.h> 45 46 #include <dev/dtv/dtvvar.h> 47 48 MODULE(MODULE_CLASS_DRIVER, dtv, NULL); 49 50 static dev_type_open(dtvopen); 51 static dev_type_close(dtvclose); 52 static dev_type_read(dtvread); 53 static dev_type_ioctl(dtvioctl); 54 static dev_type_poll(dtvpoll); 55 56 const struct cdevsw dtv_cdevsw = { 57 .d_open = dtvopen, 58 .d_close = dtvclose, 59 .d_read = dtvread, 60 .d_write = nowrite, 61 .d_ioctl = dtvioctl, 62 .d_stop = nostop, 63 .d_tty = notty, 64 .d_poll = dtvpoll, 65 .d_mmap = nommap, 66 .d_kqfilter = nokqfilter, 67 .d_flag = D_OTHER|D_MPSAFE, 68 }; 69 70 static int dtv_match(device_t, cfdata_t, void *); 71 static void dtv_attach(device_t, device_t, void *); 72 static int dtv_detach(device_t, int); 73 74 CFATTACH_DECL_NEW(dtv, 75 sizeof(struct dtv_softc), 76 dtv_match, 77 dtv_attach, 78 dtv_detach, 79 NULL 80 ); 81 82 extern struct cfdriver dtv_cd; 83 84 static int 85 dtv_match(device_t parent, cfdata_t cfdata, void *aa) 86 { 87 return 1; 88 } 89 90 static void 91 dtv_attach(device_t parent, device_t self, void *aa) 92 { 93 struct dtv_attach_args *daa = aa; 94 struct dtv_softc *sc = device_private(self); 95 struct dtv_stream *ds = &sc->sc_stream; 96 struct dvb_frontend_info info; 97 98 sc->sc_dev = self; 99 sc->sc_hw = daa->hw; 100 sc->sc_priv = daa->priv; 101 sc->sc_open = 0; 102 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 103 104 ds->ds_nbufs = 0; 105 ds->ds_buf = NULL; 106 SIMPLEQ_INIT(&ds->ds_ingress); 107 SIMPLEQ_INIT(&ds->ds_egress); 108 mutex_init(&ds->ds_egress_lock, MUTEX_DEFAULT, IPL_VM); 109 mutex_init(&ds->ds_ingress_lock, MUTEX_DEFAULT, IPL_VM); 110 cv_init(&ds->ds_sample_cv, "dtv"); 111 selinit(&ds->ds_sel); 112 dtv_scatter_buf_init(&ds->ds_data); 113 if (dtv_buffer_realloc(sc, DTV_DEFAULT_BUFSIZE) != 0) { 114 aprint_error(": no memory\n"); 115 sc->sc_dying = true; 116 return; 117 } 118 119 mutex_init(&sc->sc_demux_lock, MUTEX_DEFAULT, IPL_VM); 120 TAILQ_INIT(&sc->sc_demux_list); 121 122 dtv_device_get_devinfo(sc, &info); 123 124 aprint_naive("\n"); 125 aprint_normal(": %s", info.name); 126 switch (info.type) { 127 case FE_QPSK: 128 aprint_normal(" [QPSK]"); 129 break; 130 case FE_QAM: 131 aprint_normal(" [QAM]"); 132 break; 133 case FE_OFDM: 134 aprint_normal(" [OFDM]"); 135 break; 136 case FE_ATSC: 137 aprint_normal(" [ATSC]"); 138 break; 139 } 140 aprint_normal("\n"); 141 } 142 143 static int 144 dtv_detach(device_t self, int flags) 145 { 146 struct dtv_softc *sc = device_private(self); 147 struct dtv_stream *ds = &sc->sc_stream; 148 149 cv_destroy(&ds->ds_sample_cv); 150 mutex_destroy(&ds->ds_ingress_lock); 151 mutex_destroy(&ds->ds_egress_lock); 152 seldestroy(&ds->ds_sel); 153 dtv_buffer_realloc(sc, 0); 154 dtv_scatter_buf_destroy(&ds->ds_data); 155 156 mutex_destroy(&sc->sc_demux_lock); 157 158 return 0; 159 } 160 161 #ifdef _MODULE 162 #include "ioconf.c" 163 #endif 164 165 static int 166 dtv_modcmd(modcmd_t cmd, void *arg) 167 { 168 #ifdef _MODULE 169 int error, bmaj = -1, cmaj = -1; 170 #endif 171 172 switch (cmd) { 173 case MODULE_CMD_INIT: 174 #ifdef _MODULE 175 error = config_init_component(cfdriver_ioconf_dtv, 176 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 177 if (error) 178 return error; 179 error = devsw_attach("dtv", NULL, &bmaj, &dtv_cdevsw, &cmaj); 180 if (error) 181 config_fini_component(cfdriver_ioconf_dtv, 182 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 183 return error; 184 #else 185 return 0; 186 #endif 187 case MODULE_CMD_FINI: 188 #ifdef _MODULE 189 devsw_detach(NULL, &dtv_cdevsw); 190 return config_fini_component(cfdriver_ioconf_dtv, 191 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 192 #else 193 return 0; 194 #endif 195 default: 196 return ENOTTY; 197 } 198 } 199 200 static int 201 dtvopen(dev_t dev, int flags, int mode, lwp_t *l) 202 { 203 struct dtv_softc *sc; 204 struct dtv_ts *ts; 205 int error; 206 207 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 208 return ENXIO; 209 if (sc->sc_dying == true) 210 return ENODEV; 211 ts = &sc->sc_ts; 212 213 mutex_enter(&sc->sc_lock); 214 if (sc->sc_open == 0) { 215 error = dtv_device_open(sc, flags); 216 if (error) 217 return error; 218 sc->sc_bufsize = DTV_DEFAULT_BUFSIZE; 219 sc->sc_bufsize_chg = true; 220 memset(ts->ts_pidfilter, 0, sizeof(ts->ts_pidfilter)); 221 } 222 ++sc->sc_open; 223 mutex_exit(&sc->sc_lock); 224 225 if (ISDTVDEMUX(dev)) 226 return dtv_demux_open(sc, flags, mode, l); 227 228 return 0; 229 } 230 231 static int 232 dtvclose(dev_t dev, int flags, int mode, lwp_t *l) 233 { 234 struct dtv_softc *sc; 235 236 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 237 return ENXIO; 238 239 dtv_close_common(sc); 240 241 return 0; 242 } 243 244 static int 245 dtvread(dev_t dev, struct uio *uio, int flags) 246 { 247 struct dtv_softc *sc; 248 249 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 250 return ENXIO; 251 252 if (ISDTVDVR(dev)) 253 return dtv_buffer_read(sc, uio, flags); 254 255 return ENXIO; 256 } 257 258 static int 259 dtvioctl(dev_t dev, u_long cmd, void *ptr, int flags, lwp_t *l) 260 { 261 struct dtv_softc *sc; 262 263 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 264 return ENXIO; 265 266 if (ISDTVFRONTEND(dev)) { 267 return dtv_frontend_ioctl(sc, cmd, ptr, flags); 268 } 269 270 return EINVAL; 271 } 272 273 static int 274 dtvpoll(dev_t dev, int events, lwp_t *l) 275 { 276 struct dtv_softc *sc; 277 278 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 279 return POLLERR; 280 281 if (ISDTVFRONTEND(dev)) { 282 return POLLPRI|POLLIN; /* XXX event */ 283 } else if (ISDTVDVR(dev)) { 284 return dtv_buffer_poll(sc, events, l); 285 } 286 287 return POLLERR; 288 } 289 290 void 291 dtv_close_common(struct dtv_softc *sc) 292 { 293 mutex_enter(&sc->sc_lock); 294 KASSERT(sc->sc_open > 0); 295 --sc->sc_open; 296 if (sc->sc_open == 0) { 297 dtv_device_close(sc); 298 dtv_buffer_destroy(sc); 299 } 300 mutex_exit(&sc->sc_lock); 301 } 302 303 int 304 dtv_print(void *arg, const char *pnp) 305 { 306 if (pnp) 307 aprint_normal("dtv at %s", pnp); 308 309 return UNCONF; 310 } 311
Indexes created Mon Sep 29 21:09:56 GMT 2025