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 | |