1 // SPDX-License-Identifier: GPL-2.0
2 /* dvb-usb-dvb.c is part of the DVB USB library.
3 *
4 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
5 * see dvb-usb-init.c for copyright information.
6 *
7 * This file contains functions for initializing and handling the
8 * linux-dvb API.
9 */
10 #include "dvb-usb-common.h"
11 #include <media/media-device.h>
12
13 /* does the complete input transfer handling */
dvb_usb_ctrl_feed(struct dvb_demux_feed * dvbdmxfeed,int onoff)14 static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
15 {
16 struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
17 int newfeedcount, ret;
18
19 if (adap == NULL)
20 return -ENODEV;
21
22 if ((adap->active_fe < 0) ||
23 (adap->active_fe >= adap->num_frontends_initialized)) {
24 return -EINVAL;
25 }
26
27 newfeedcount = adap->feedcount + (onoff ? 1 : -1);
28
29 /* stop feed before setting a new pid if there will be no pid anymore */
30 if (newfeedcount == 0) {
31 deb_ts("stop feeding\n");
32 usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
33
34 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
35 ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
36 if (ret < 0) {
37 err("error while stopping stream.");
38 return ret;
39 }
40 }
41 }
42
43 adap->feedcount = newfeedcount;
44
45 /* activate the pid on the device specific pid_filter */
46 deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
47 adap->fe_adap[adap->active_fe].pid_filtering ?
48 "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
49 dvbdmxfeed->index, onoff ? "on" : "off");
50 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
51 adap->fe_adap[adap->active_fe].pid_filtering &&
52 adap->props.fe[adap->active_fe].pid_filter != NULL)
53 adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
54
55 /* start the feed if this was the first feed and there is still a feed
56 * for reception.
57 */
58 if (adap->feedcount == onoff && adap->feedcount > 0) {
59 deb_ts("controlling pid parser\n");
60 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
61 adap->props.fe[adap->active_fe].caps &
62 DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
63 adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
64 ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
65 adap->fe_adap[adap->active_fe].pid_filtering);
66 if (ret < 0) {
67 err("could not handle pid_parser");
68 return ret;
69 }
70 }
71 deb_ts("start feeding\n");
72 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
73 ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
74 if (ret < 0) {
75 err("error while enabling fifo.");
76 return ret;
77 }
78 }
79
80 deb_ts("submitting all URBs\n");
81 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
82 }
83 return 0;
84 }
85
dvb_usb_start_feed(struct dvb_demux_feed * dvbdmxfeed)86 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
87 {
88 deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,
89 dvbdmxfeed->type);
90 return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
91 }
92
dvb_usb_stop_feed(struct dvb_demux_feed * dvbdmxfeed)93 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
94 {
95 deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
96 return dvb_usb_ctrl_feed(dvbdmxfeed, 0);
97 }
98
dvb_usb_media_device_init(struct dvb_usb_adapter * adap)99 static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
100 {
101 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
102 struct media_device *mdev;
103 struct dvb_usb_device *d = adap->dev;
104 struct usb_device *udev = d->udev;
105
106 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
107 if (!mdev)
108 return -ENOMEM;
109
110 media_device_usb_init(mdev, udev, d->desc->name);
111
112 dvb_register_media_controller(&adap->dvb_adap, mdev);
113
114 dev_info(&d->udev->dev, "media controller created\n");
115 #endif
116 return 0;
117 }
118
dvb_usb_media_device_register(struct dvb_usb_adapter * adap)119 static int dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
120 {
121 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
122 return media_device_register(adap->dvb_adap.mdev);
123 #else
124 return 0;
125 #endif
126 }
127
dvb_usb_media_device_unregister(struct dvb_usb_adapter * adap)128 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
129 {
130 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
131 if (!adap->dvb_adap.mdev)
132 return;
133
134 mutex_lock(&adap->dvb_adap.mdev_lock);
135
136 media_device_unregister(adap->dvb_adap.mdev);
137 media_device_cleanup(adap->dvb_adap.mdev);
138 kfree(adap->dvb_adap.mdev);
139 adap->dvb_adap.mdev = NULL;
140
141 mutex_unlock(&adap->dvb_adap.mdev_lock);
142 #endif
143 }
144
dvb_usb_adapter_dvb_init(struct dvb_usb_adapter * adap,short * adapter_nums)145 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
146 {
147 int i;
148 int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
149 adap->dev->owner, &adap->dev->udev->dev,
150 adapter_nums);
151
152 if (ret < 0) {
153 deb_info("dvb_register_adapter failed: error %d", ret);
154 goto err;
155 }
156 adap->dvb_adap.priv = adap;
157
158 ret = dvb_usb_media_device_init(adap);
159 if (ret < 0) {
160 deb_info("dvb_usb_media_device_init failed: error %d", ret);
161 goto err_mc;
162 }
163
164 if (adap->dev->props.read_mac_address) {
165 if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
166 info("MAC address: %pM", adap->dvb_adap.proposed_mac);
167 else
168 err("MAC address reading failed.");
169 }
170
171
172 adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
173 adap->demux.priv = adap;
174
175 adap->demux.filternum = 0;
176 for (i = 0; i < adap->props.num_frontends; i++) {
177 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
178 adap->demux.filternum = adap->fe_adap[i].max_feed_count;
179 }
180 adap->demux.feednum = adap->demux.filternum;
181 adap->demux.start_feed = dvb_usb_start_feed;
182 adap->demux.stop_feed = dvb_usb_stop_feed;
183 adap->demux.write_to_decoder = NULL;
184 if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
185 err("dvb_dmx_init failed: error %d", ret);
186 goto err_dmx;
187 }
188
189 adap->dmxdev.filternum = adap->demux.filternum;
190 adap->dmxdev.demux = &adap->demux.dmx;
191 adap->dmxdev.capabilities = 0;
192 if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
193 err("dvb_dmxdev_init failed: error %d", ret);
194 goto err_dmx_dev;
195 }
196
197 if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
198 &adap->demux.dmx)) < 0) {
199 err("dvb_net_init failed: error %d", ret);
200 goto err_net_init;
201 }
202
203 adap->state |= DVB_USB_ADAP_STATE_DVB;
204 return 0;
205
206 err_net_init:
207 dvb_dmxdev_release(&adap->dmxdev);
208 err_dmx_dev:
209 dvb_dmx_release(&adap->demux);
210 err_dmx:
211 dvb_usb_media_device_unregister(adap);
212 err_mc:
213 dvb_unregister_adapter(&adap->dvb_adap);
214 err:
215 return ret;
216 }
217
dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter * adap)218 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
219 {
220 if (adap->state & DVB_USB_ADAP_STATE_DVB) {
221 deb_info("unregistering DVB part\n");
222 dvb_net_release(&adap->dvb_net);
223 adap->demux.dmx.close(&adap->demux.dmx);
224 dvb_dmxdev_release(&adap->dmxdev);
225 dvb_dmx_release(&adap->demux);
226 dvb_usb_media_device_unregister(adap);
227 dvb_unregister_adapter(&adap->dvb_adap);
228 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
229 }
230 return 0;
231 }
232
dvb_usb_set_active_fe(struct dvb_frontend * fe,int onoff)233 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
234 {
235 struct dvb_usb_adapter *adap = fe->dvb->priv;
236
237 int ret = (adap->props.frontend_ctrl) ?
238 adap->props.frontend_ctrl(fe, onoff) : 0;
239
240 if (ret < 0) {
241 err("frontend_ctrl request failed");
242 return ret;
243 }
244 if (onoff)
245 adap->active_fe = fe->id;
246
247 return 0;
248 }
249
dvb_usb_fe_wakeup(struct dvb_frontend * fe)250 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
251 {
252 struct dvb_usb_adapter *adap = fe->dvb->priv;
253
254 dvb_usb_device_power_ctrl(adap->dev, 1);
255
256 dvb_usb_set_active_fe(fe, 1);
257
258 if (adap->fe_adap[fe->id].fe_init)
259 adap->fe_adap[fe->id].fe_init(fe);
260
261 return 0;
262 }
263
dvb_usb_fe_sleep(struct dvb_frontend * fe)264 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
265 {
266 struct dvb_usb_adapter *adap = fe->dvb->priv;
267
268 if (adap->fe_adap[fe->id].fe_sleep)
269 adap->fe_adap[fe->id].fe_sleep(fe);
270
271 dvb_usb_set_active_fe(fe, 0);
272
273 return dvb_usb_device_power_ctrl(adap->dev, 0);
274 }
275
dvb_usb_adapter_frontend_init(struct dvb_usb_adapter * adap)276 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
277 {
278 int ret, i;
279
280 /* register all given adapter frontends */
281 for (i = 0; i < adap->props.num_frontends; i++) {
282
283 if (adap->props.fe[i].frontend_attach == NULL) {
284 err("strange: '%s' #%d,%d doesn't want to attach a frontend.",
285 adap->dev->desc->name, adap->id, i);
286
287 return 0;
288 }
289
290 ret = adap->props.fe[i].frontend_attach(adap);
291 if (ret || adap->fe_adap[i].fe == NULL) {
292 /* only print error when there is no FE at all */
293 if (i == 0)
294 err("no frontend was attached by '%s'",
295 adap->dev->desc->name);
296
297 return 0;
298 }
299
300 adap->fe_adap[i].fe->id = i;
301
302 /* re-assign sleep and wakeup functions */
303 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
304 adap->fe_adap[i].fe->ops.init = dvb_usb_fe_wakeup;
305 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
306 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
307
308 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
309 err("Frontend %d registration failed.", i);
310 dvb_frontend_detach(adap->fe_adap[i].fe);
311 adap->fe_adap[i].fe = NULL;
312 /* In error case, do not try register more FEs,
313 * still leaving already registered FEs alive. */
314 if (i == 0)
315 return -ENODEV;
316 else
317 return 0;
318 }
319
320 /* only attach the tuner if the demod is there */
321 if (adap->props.fe[i].tuner_attach != NULL)
322 adap->props.fe[i].tuner_attach(adap);
323
324 adap->num_frontends_initialized++;
325 }
326
327 ret = dvb_create_media_graph(&adap->dvb_adap, true);
328 if (ret)
329 return ret;
330
331 ret = dvb_usb_media_device_register(adap);
332
333 return ret;
334 }
335
dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter * adap)336 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
337 {
338 int i = adap->num_frontends_initialized - 1;
339
340 /* unregister all given adapter frontends */
341 for (; i >= 0; i--) {
342 if (adap->fe_adap[i].fe != NULL) {
343 dvb_unregister_frontend(adap->fe_adap[i].fe);
344 dvb_frontend_detach(adap->fe_adap[i].fe);
345 }
346 }
347 adap->num_frontends_initialized = 0;
348
349 return 0;
350 }
351