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1// SPDX-License-Identifier: GPL-2.02/* 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 the8 * linux-dvb API.9 */10#include "dvb-usb-common.h"11#include <media/media-device.h>12 13/* does the complete input transfer handling */14static 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 feed56	 * 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 86static 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 93static 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 99static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)100{101#ifdef CONFIG_MEDIA_CONTROLLER_DVB102	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#endif116	return 0;117}118 119static int  dvb_usb_media_device_register(struct dvb_usb_adapter *adap)120{121#ifdef CONFIG_MEDIA_CONTROLLER_DVB122	return media_device_register(adap->dvb_adap.mdev);123#else124	return 0;125#endif126}127 128static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)129{130#ifdef CONFIG_MEDIA_CONTROLLER_DVB131	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#endif143}144 145int 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		else168			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 206err_net_init:207	dvb_dmxdev_release(&adap->dmxdev);208err_dmx_dev:209	dvb_dmx_release(&adap->demux);210err_dmx:211	dvb_usb_media_device_unregister(adap);212err_mc:213	dvb_unregister_adapter(&adap->dvb_adap);214err:215	return ret;216}217 218int 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 233static 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 250static 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 264static 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 276int 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			else317				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 336int 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