dtv_device.c revision 1.4
1 /* $NetBSD: dtv_device.c,v 1.4 2011/07/12 00:57:19 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 1.4 2011/07/12 00:57:19 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 atomic_swap_uint(&sc->sc_open, 0); 102 103 ds->ds_nbufs = 0; 104 ds->ds_buf = NULL; 105 SIMPLEQ_INIT(&ds->ds_ingress); 106 SIMPLEQ_INIT(&ds->ds_egress); 107 mutex_init(&ds->ds_egress_lock, MUTEX_DEFAULT, IPL_VM); 108 mutex_init(&ds->ds_ingress_lock, MUTEX_DEFAULT, IPL_VM); 109 cv_init(&ds->ds_sample_cv, "dtv"); 110 selinit(&ds->ds_sel); 111 dtv_scatter_buf_init(&ds->ds_data); 112 if (dtv_buffer_realloc(sc, DTV_DEFAULT_BUFSIZE) != 0) { 113 aprint_error(": no memory\n"); 114 sc->sc_dying = true; 115 return; 116 } 117 118 dtv_device_get_devinfo(sc, &info); 119 120 aprint_naive("\n"); 121 aprint_normal(": %s", info.name); 122 switch (info.type) { 123 case FE_QPSK: 124 aprint_normal(" [QPSK]"); 125 break; 126 case FE_QAM: 127 aprint_normal(" [QAM]"); 128 break; 129 case FE_OFDM: 130 aprint_normal(" [OFDM]"); 131 break; 132 case FE_ATSC: 133 aprint_normal(" [ATSC]"); 134 break; 135 } 136 aprint_normal("\n"); 137 } 138 139 static int 140 dtv_detach(device_t self, int flags) 141 { 142 struct dtv_softc *sc = device_private(self); 143 struct dtv_stream *ds = &sc->sc_stream; 144 145 cv_destroy(&ds->ds_sample_cv); 146 mutex_destroy(&ds->ds_ingress_lock); 147 mutex_destroy(&ds->ds_egress_lock); 148 seldestroy(&ds->ds_sel); 149 dtv_buffer_realloc(sc, 0); 150 dtv_scatter_buf_destroy(&ds->ds_data); 151 152 return 0; 153 } 154 155 #ifdef _MODULE 156 #include "ioconf.c" 157 #endif 158 159 static int 160 dtv_modcmd(modcmd_t cmd, void *arg) 161 { 162 #ifdef _MODULE 163 int error, bmaj = -1, cmaj = -1; 164 #endif 165 166 switch (cmd) { 167 case MODULE_CMD_INIT: 168 #ifdef _MODULE 169 error = config_init_component(cfdriver_ioconf_dtv, 170 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 171 if (error) 172 return error; 173 error = devsw_attach("dtv", NULL, &bmaj, &dtv_cdevsw, &cmaj); 174 if (error) 175 config_fini_component(cfdriver_ioconf_dtv, 176 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 177 return error; 178 #else 179 return 0; 180 #endif 181 case MODULE_CMD_FINI: 182 #ifdef _MODULE 183 devsw_detach(NULL, &dtv_cdevsw); 184 return config_fini_component(cfdriver_ioconf_dtv, 185 cfattach_ioconf_dtv, cfdata_ioconf_dtv); 186 #else 187 return 0; 188 #endif 189 default: 190 return ENOTTY; 191 } 192 } 193 194 static int 195 dtvopen(dev_t dev, int flags, int mode, lwp_t *l) 196 { 197 struct dtv_softc *sc; 198 struct dtv_ts *ts; 199 unsigned int n; 200 int error; 201 202 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 203 return ENXIO; 204 if (sc->sc_dying == true) 205 return ENODEV; 206 ts = &sc->sc_ts; 207 208 n = atomic_cas_uint(&sc->sc_open, 0, 1); 209 if (n == 0) { 210 error = dtv_device_open(sc, flags); 211 if (error) { 212 atomic_swap_uint(&sc->sc_open, 0); 213 return error; 214 } 215 sc->sc_bufsize = DTV_DEFAULT_BUFSIZE; 216 sc->sc_bufsize_chg = true; 217 memset(ts->ts_pidfilter, 0, sizeof(ts->ts_pidfilter)); 218 } 219 220 return 0; 221 } 222 223 static int 224 dtvclose(dev_t dev, int flags, int mode, lwp_t *l) 225 { 226 struct dtv_softc *sc; 227 228 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 229 return ENXIO; 230 231 dtv_device_close(sc); 232 dtv_buffer_destroy(sc); 233 atomic_swap_uint(&sc->sc_open, 0); 234 235 return 0; 236 } 237 238 static int 239 dtvread(dev_t dev, struct uio *uio, int flags) 240 { 241 struct dtv_softc *sc; 242 243 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 244 return ENXIO; 245 246 if (ISDTVDVR(dev)) 247 return dtv_buffer_read(sc, uio, flags); 248 249 return ENXIO; 250 } 251 252 static int 253 dtvioctl(dev_t dev, u_long cmd, void *ptr, int flags, lwp_t *l) 254 { 255 struct dtv_softc *sc; 256 257 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 258 return ENXIO; 259 260 if (ISDTVFRONTEND(dev)) { 261 return dtv_frontend_ioctl(sc, cmd, ptr, flags); 262 } else if (ISDTVDEMUX(dev)) { 263 return dtv_demux_ioctl(sc, cmd, ptr, flags); 264 } 265 266 return EINVAL; 267 } 268 269 static int 270 dtvpoll(dev_t dev, int events, lwp_t *l) 271 { 272 struct dtv_softc *sc; 273 274 if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) 275 return POLLERR; 276 277 if (ISDTVFRONTEND(dev)) { 278 return POLLPRI|POLLIN; /* XXX event */ 279 } else if (ISDTVDEMUX(dev)) { 280 return POLLIN|POLLOUT; /* XXX */ 281 } else if (ISDTVDVR(dev)) { 282 return dtv_buffer_poll(sc, events, l); 283 } 284 285 return POLLERR; 286 } 287 288 int 289 dtv_print(void *arg, const char *pnp) 290 { 291 if (pnp) 292 aprint_normal("dtv at %s", pnp); 293 294 return UNCONF; 295 } 296
Indexes created Sun Sep 28 12:09:53 GMT 2025