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