| 1 | /* $NetBSD: dtv_device.c,v 1.11 2014/08/09 13:34:10 jmcneill Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2011 Jared D. McNeill <jmcneill@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 1.11 2014/08/09 13:34:10 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_discard = nodiscard, |
| 68 | .d_flag = D_OTHER | D_MPSAFE, |
| 69 | }; |
| 70 | |
| 71 | static int dtv_match(device_t, cfdata_t, void *); |
| 72 | static void dtv_attach(device_t, device_t, void *); |
| 73 | static int dtv_detach(device_t, int); |
| 74 | |
| 75 | CFATTACH_DECL_NEW(dtv, |
| 76 | sizeof(struct dtv_softc), |
| 77 | dtv_match, |
| 78 | dtv_attach, |
| 79 | dtv_detach, |
| 80 | NULL |
| 81 | ); |
| 82 | |
| 83 | extern struct cfdriver dtv_cd; |
| 84 | |
| 85 | static int |
| 86 | dtv_match(device_t parent, cfdata_t cfdata, void *aa) |
| 87 | { |
| 88 | return 1; |
| 89 | } |
| 90 | |
| 91 | static void |
| 92 | dtv_attach(device_t parent, device_t self, void *aa) |
| 93 | { |
| 94 | struct dtv_attach_args *daa = aa; |
| 95 | struct dtv_softc *sc = device_private(self); |
| 96 | struct dtv_stream *ds = &sc->sc_stream; |
| 97 | struct dvb_frontend_info info; |
| 98 | |
| 99 | sc->sc_dev = self; |
| 100 | sc->sc_hw = daa->hw; |
| 101 | sc->sc_priv = daa->priv; |
| 102 | sc->sc_open = 0; |
| 103 | mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); |
| 104 | |
| 105 | ds->ds_nbufs = 0; |
| 106 | ds->ds_buf = NULL; |
| 107 | SIMPLEQ_INIT(&ds->ds_ingress); |
| 108 | SIMPLEQ_INIT(&ds->ds_egress); |
| 109 | mutex_init(&ds->ds_egress_lock, MUTEX_DEFAULT, IPL_SCHED); |
| 110 | mutex_init(&ds->ds_ingress_lock, MUTEX_DEFAULT, IPL_SCHED); |
| 111 | cv_init(&ds->ds_sample_cv, "dtv" ); |
| 112 | selinit(&ds->ds_sel); |
| 113 | dtv_scatter_buf_init(&ds->ds_data); |
| 114 | if (dtv_buffer_realloc(sc, DTV_DEFAULT_BUFSIZE) != 0) { |
| 115 | aprint_error(": no memory\n" ); |
| 116 | sc->sc_dying = true; |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | mutex_init(&sc->sc_demux_lock, MUTEX_DEFAULT, IPL_SCHED); |
| 121 | TAILQ_INIT(&sc->sc_demux_list); |
| 122 | sc->sc_demux_runcnt = 0; |
| 123 | |
| 124 | dtv_device_get_devinfo(sc, &info); |
| 125 | |
| 126 | aprint_naive("\n" ); |
| 127 | aprint_normal(": %s" , info.name); |
| 128 | switch (info.type) { |
| 129 | case FE_QPSK: |
| 130 | aprint_normal(" [QPSK]" ); |
| 131 | break; |
| 132 | case FE_QAM: |
| 133 | aprint_normal(" [QAM]" ); |
| 134 | break; |
| 135 | case FE_OFDM: |
| 136 | aprint_normal(" [OFDM]" ); |
| 137 | break; |
| 138 | case FE_ATSC: |
| 139 | aprint_normal(" [ATSC]" ); |
| 140 | break; |
| 141 | } |
| 142 | aprint_normal("\n" ); |
| 143 | } |
| 144 | |
| 145 | static int |
| 146 | dtv_detach(device_t self, int flags) |
| 147 | { |
| 148 | struct dtv_softc *sc = device_private(self); |
| 149 | struct dtv_stream *ds = &sc->sc_stream; |
| 150 | |
| 151 | cv_destroy(&ds->ds_sample_cv); |
| 152 | mutex_destroy(&ds->ds_ingress_lock); |
| 153 | mutex_destroy(&ds->ds_egress_lock); |
| 154 | seldestroy(&ds->ds_sel); |
| 155 | dtv_buffer_realloc(sc, 0); |
| 156 | dtv_scatter_buf_destroy(&ds->ds_data); |
| 157 | |
| 158 | mutex_destroy(&sc->sc_demux_lock); |
| 159 | mutex_destroy(&sc->sc_lock); |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | #ifdef _MODULE |
| 165 | #include "ioconf.c" |
| 166 | #endif |
| 167 | |
| 168 | static int |
| 169 | dtv_modcmd(modcmd_t cmd, void *arg) |
| 170 | { |
| 171 | #ifdef _MODULE |
| 172 | int error, bmaj = -1, cmaj = -1; |
| 173 | #endif |
| 174 | |
| 175 | switch (cmd) { |
| 176 | case MODULE_CMD_INIT: |
| 177 | #ifdef _MODULE |
| 178 | error = config_init_component(cfdriver_ioconf_dtv, |
| 179 | cfattach_ioconf_dtv, cfdata_ioconf_dtv); |
| 180 | if (error) |
| 181 | return error; |
| 182 | error = devsw_attach("dtv" , NULL, &bmaj, &dtv_cdevsw, &cmaj); |
| 183 | if (error) |
| 184 | config_fini_component(cfdriver_ioconf_dtv, |
| 185 | cfattach_ioconf_dtv, cfdata_ioconf_dtv); |
| 186 | return error; |
| 187 | #else |
| 188 | return 0; |
| 189 | #endif |
| 190 | case MODULE_CMD_FINI: |
| 191 | #ifdef _MODULE |
| 192 | devsw_detach(NULL, &dtv_cdevsw); |
| 193 | return config_fini_component(cfdriver_ioconf_dtv, |
| 194 | cfattach_ioconf_dtv, cfdata_ioconf_dtv); |
| 195 | #else |
| 196 | return 0; |
| 197 | #endif |
| 198 | default: |
| 199 | return ENOTTY; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | static int |
| 204 | dtvopen(dev_t dev, int flags, int mode, lwp_t *l) |
| 205 | { |
| 206 | struct dtv_softc *sc; |
| 207 | struct dtv_ts *ts; |
| 208 | int error; |
| 209 | |
| 210 | if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) |
| 211 | return ENXIO; |
| 212 | if (sc->sc_dying == true) |
| 213 | return ENODEV; |
| 214 | ts = &sc->sc_ts; |
| 215 | |
| 216 | mutex_enter(&sc->sc_lock); |
| 217 | if (sc->sc_open == 0) { |
| 218 | error = dtv_device_open(sc, flags); |
| 219 | if (error) |
| 220 | return error; |
| 221 | sc->sc_bufsize = DTV_DEFAULT_BUFSIZE; |
| 222 | sc->sc_bufsize_chg = true; |
| 223 | memset(ts->ts_pidfilter, 0, sizeof(ts->ts_pidfilter)); |
| 224 | } |
| 225 | ++sc->sc_open; |
| 226 | mutex_exit(&sc->sc_lock); |
| 227 | |
| 228 | if (ISDTVDEMUX(dev)) |
| 229 | return dtv_demux_open(sc, flags, mode, l); |
| 230 | |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static int |
| 235 | dtvclose(dev_t dev, int flags, int mode, lwp_t *l) |
| 236 | { |
| 237 | struct dtv_softc *sc; |
| 238 | |
| 239 | if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) |
| 240 | return ENXIO; |
| 241 | |
| 242 | dtv_common_close(sc); |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static int |
| 248 | dtvread(dev_t dev, struct uio *uio, int flags) |
| 249 | { |
| 250 | struct dtv_softc *sc; |
| 251 | |
| 252 | if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) |
| 253 | return ENXIO; |
| 254 | |
| 255 | if (ISDTVDVR(dev)) |
| 256 | return dtv_buffer_read(sc, uio, flags); |
| 257 | |
| 258 | return ENXIO; |
| 259 | } |
| 260 | |
| 261 | static int |
| 262 | dtvioctl(dev_t dev, u_long cmd, void *ptr, int flags, lwp_t *l) |
| 263 | { |
| 264 | struct dtv_softc *sc; |
| 265 | |
| 266 | if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) |
| 267 | return ENXIO; |
| 268 | |
| 269 | if (ISDTVFRONTEND(dev)) { |
| 270 | return dtv_frontend_ioctl(sc, cmd, ptr, flags); |
| 271 | } |
| 272 | |
| 273 | return EINVAL; |
| 274 | } |
| 275 | |
| 276 | static int |
| 277 | dtvpoll(dev_t dev, int events, lwp_t *l) |
| 278 | { |
| 279 | struct dtv_softc *sc; |
| 280 | |
| 281 | if ((sc = device_lookup_private(&dtv_cd, DTVUNIT(dev))) == NULL) |
| 282 | return POLLERR; |
| 283 | |
| 284 | if (ISDTVFRONTEND(dev)) { |
| 285 | return POLLPRI|POLLIN; /* XXX event */ |
| 286 | } else if (ISDTVDVR(dev)) { |
| 287 | return dtv_buffer_poll(sc, events, l); |
| 288 | } |
| 289 | |
| 290 | return POLLERR; |
| 291 | } |
| 292 | |
| 293 | void |
| 294 | dtv_common_close(struct dtv_softc *sc) |
| 295 | { |
| 296 | mutex_enter(&sc->sc_lock); |
| 297 | KASSERT(sc->sc_open > 0); |
| 298 | --sc->sc_open; |
| 299 | if (sc->sc_open == 0) { |
| 300 | dtv_device_close(sc); |
| 301 | dtv_buffer_destroy(sc); |
| 302 | } |
| 303 | mutex_exit(&sc->sc_lock); |
| 304 | } |
| 305 | |