[deliverable/linux.git] / drivers / media / dvb / dvb-usb / dvb-usb-dvb.c

/* dvb-usb-dvb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
 * see dvb-usb-init.c for copyright information.
 *
 * This file contains functions for initializing and handling the
 * linux-dvb API.
 */
#include "dvb-usb-common.h"

/* does the complete input transfer handling */
static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
{
	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
	int newfeedcount, ret;

	if (adap == NULL)
		return -ENODEV;

	if ((adap->active_fe < 0) ||
	    (adap->active_fe >= adap->num_frontends_initialized)) {
		return -EINVAL;
	}

	newfeedcount = adap->feedcount + (onoff ? 1 : -1);

	/* stop feed before setting a new pid if there will be no pid anymore */
	if (newfeedcount == 0) {
		deb_ts("stop feeding\n");
		usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);

		if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
			ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
			if (ret < 0) {
				err("error while stopping stream.");
				return ret;
			}
		}
	}

	adap->feedcount = newfeedcount;

	/* activate the pid on the device specific pid_filter */
	deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
		adap->fe_adap[adap->active_fe].pid_filtering ?
		"yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
		dvbdmxfeed->index, onoff ? "on" : "off");
	if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
		adap->fe_adap[adap->active_fe].pid_filtering &&
		adap->props.fe[adap->active_fe].pid_filter != NULL)
		adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);

	/* start the feed if this was the first feed and there is still a feed
	 * for reception.
	 */
	if (adap->feedcount == onoff && adap->feedcount > 0) {
		deb_ts("submitting all URBs\n");
		usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);

		deb_ts("controlling pid parser\n");
		if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
			adap->props.fe[adap->active_fe].caps &
			DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
			adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
			ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
				adap->fe_adap[adap->active_fe].pid_filtering);
			if (ret < 0) {
				err("could not handle pid_parser");
				return ret;
			}
		}
		deb_ts("start feeding\n");
		if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
			ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
			if (ret < 0) {
				err("error while enabling fifo.");
				return ret;
			}
		}

	}
	return 0;
}

static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
	return dvb_usb_ctrl_feed(dvbdmxfeed,1);
}

static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
	return dvb_usb_ctrl_feed(dvbdmxfeed,0);
}

int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
{
	int i;
	int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
				       adap->dev->owner, &adap->dev->udev->dev,
				       adapter_nums);

	if (ret < 0) {
		deb_info("dvb_register_adapter failed: error %d", ret);
		goto err;
	}
	adap->dvb_adap.priv = adap;
	adap->dvb_adap.fe_ioctl_override = adap->props.fe_ioctl_override;

	if (adap->dev->props.read_mac_address) {
		if (adap->dev->props.read_mac_address(adap->dev,adap->dvb_adap.proposed_mac) == 0)
			info("MAC address: %pM",adap->dvb_adap.proposed_mac);
		else
			err("MAC address reading failed.");
	}


	adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
	adap->demux.priv             = adap;

	adap->demux.filternum        = 0;
	for (i = 0; i < adap->props.num_frontends; i++) {
		if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
			adap->demux.filternum = adap->fe_adap[i].max_feed_count;
	}
	adap->demux.feednum          = adap->demux.filternum;
	adap->demux.start_feed       = dvb_usb_start_feed;
	adap->demux.stop_feed        = dvb_usb_stop_feed;
	adap->demux.write_to_decoder = NULL;
	if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
		err("dvb_dmx_init failed: error %d",ret);
		goto err_dmx;
	}

	adap->dmxdev.filternum       = adap->demux.filternum;
	adap->dmxdev.demux           = &adap->demux.dmx;
	adap->dmxdev.capabilities    = 0;
	if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
		err("dvb_dmxdev_init failed: error %d",ret);
		goto err_dmx_dev;
	}

	if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
						&adap->demux.dmx)) < 0) {
		err("dvb_net_init failed: error %d",ret);
		goto err_net_init;
	}

	adap->state |= DVB_USB_ADAP_STATE_DVB;
	return 0;

err_net_init:
	dvb_dmxdev_release(&adap->dmxdev);
err_dmx_dev:
	dvb_dmx_release(&adap->demux);
err_dmx:
	dvb_unregister_adapter(&adap->dvb_adap);
err:
	return ret;
}

int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
{
	if (adap->state & DVB_USB_ADAP_STATE_DVB) {
		deb_info("unregistering DVB part\n");
		dvb_net_release(&adap->dvb_net);
		adap->demux.dmx.close(&adap->demux.dmx);
		dvb_dmxdev_release(&adap->dmxdev);
		dvb_dmx_release(&adap->demux);
		dvb_unregister_adapter(&adap->dvb_adap);
		adap->state &= ~DVB_USB_ADAP_STATE_DVB;
	}
	return 0;
}

static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
{
	struct dvb_usb_adapter *adap = fe->dvb->priv;

	int ret = (adap->props.frontend_ctrl) ?
		adap->props.frontend_ctrl(fe, onoff) : 0;

	if (ret < 0) {
		err("frontend_ctrl request failed");
		return ret;
	}
	if (onoff)
		adap->active_fe = fe->id;

	return 0;
}

static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
{
	struct dvb_usb_adapter *adap = fe->dvb->priv;

	dvb_usb_device_power_ctrl(adap->dev, 1);

	dvb_usb_set_active_fe(fe, 1);

	if (adap->fe_adap[fe->id].fe_init)
		adap->fe_adap[fe->id].fe_init(fe);

	return 0;
}

static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
{
	struct dvb_usb_adapter *adap = fe->dvb->priv;

	if (adap->fe_adap[fe->id].fe_sleep)
		adap->fe_adap[fe->id].fe_sleep(fe);

	dvb_usb_set_active_fe(fe, 0);

	return dvb_usb_device_power_ctrl(adap->dev, 0);
}

int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
{
	int ret, i;

	/* register all given adapter frontends */
	for (i = 0; i < adap->props.num_frontends; i++) {

		if (adap->props.fe[i].frontend_attach == NULL) {
			err("strange: '%s' #%d,%d "
			    "doesn't want to attach a frontend.",
			    adap->dev->desc->name, adap->id, i);

			return 0;
		}

		ret = adap->props.fe[i].frontend_attach(adap);
		if (ret || adap->fe_adap[i].fe == NULL) {
			/* only print error when there is no FE at all */
			if (i == 0)
				err("no frontend was attached by '%s'",
					adap->dev->desc->name);

			return 0;
		}

		adap->fe_adap[i].fe->id = i;

		/* re-assign sleep and wakeup functions */
		adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
		adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
		adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
		adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;

		if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
			err("Frontend %d registration failed.", i);
			dvb_frontend_detach(adap->fe_adap[i].fe);
			adap->fe_adap[i].fe = NULL;
			/* In error case, do not try register more FEs,
			 * still leaving already registered FEs alive. */
			if (i == 0)
				return -ENODEV;
			else
				return 0;
		}

		/* only attach the tuner if the demod is there */
		if (adap->props.fe[i].tuner_attach != NULL)
			adap->props.fe[i].tuner_attach(adap);

		adap->num_frontends_initialized++;
	}

	return 0;
}

int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
{
	int i = adap->num_frontends_initialized - 1;

	/* unregister all given adapter frontends */
	for (; i >= 0; i--) {
		if (adap->fe_adap[i].fe != NULL) {
			dvb_unregister_frontend(adap->fe_adap[i].fe);
			dvb_frontend_detach(adap->fe_adap[i].fe);
		}
	}
	adap->num_frontends_initialized = 0;

	return 0;
}
Commit	Line	Data
776338e1 JS	1	/* dvb-usb-dvb.c is part of the DVB USB library.
776338e1 JS	2	*
4d43e13f	3	* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
776338e1 JS	4	* see dvb-usb-init.c for copyright information.
	5	*
	6	* This file contains functions for initializing and handling the
	7	* linux-dvb API.
	8	*/
	9	#include "dvb-usb-common.h"
	10
4d43e13f	11	/* does the complete input transfer handling */
776338e1 JS	12	static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
776338e1 JS	13	{
4d43e13f	14	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
c8b7ced3	15	int newfeedcount, ret;
776338e1	16
4d43e13f	17	if (adap == NULL)
776338e1 JS	18	return -ENODEV;
776338e1 JS	19
2d04c13a MK	20	if ((adap->active_fe < 0) \|\|
2d04c13a MK	21	(adap->active_fe >= adap->num_frontends_initialized)) {
77eed219 MK	22	return -EINVAL;
	23	}
	24
4d43e13f	25	newfeedcount = adap->feedcount + (onoff ? 1 : -1);
776338e1	26
4d43e13f	27	/* stop feed before setting a new pid if there will be no pid anymore */
776338e1 JS	28	if (newfeedcount == 0) {
776338e1 JS	29	deb_ts("stop feeding\n");
77eed219	30	usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
776338e1	31
77eed219 MK	32	if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
77eed219 MK	33	ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
dca6b74b MP	34	if (ret < 0) {
dca6b74b MP	35	err("error while stopping stream.");
c8b7ced3	36	return ret;
dca6b74b	37	}
c8b7ced3	38	}
776338e1 JS	39	}
776338e1 JS	40
4d43e13f	41	adap->feedcount = newfeedcount;
776338e1 JS	42
776338e1 JS	43	/* activate the pid on the device specific pid_filter */
2b7a7c30 MK	44	deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
	45	adap->fe_adap[adap->active_fe].pid_filtering ?
	46	"yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
	47	dvbdmxfeed->index, onoff ? "on" : "off");
77eed219 MK	48	if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
	49	adap->fe_adap[adap->active_fe].pid_filtering &&
	50	adap->props.fe[adap->active_fe].pid_filter != NULL)
	51	adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
776338e1 JS	52
	53	/* start the feed if this was the first feed and there is still a feed
	54	* for reception.
	55	*/
4d43e13f	56	if (adap->feedcount == onoff && adap->feedcount > 0) {
8126fdbc	57	deb_ts("submitting all URBs\n");
77eed219	58	usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
776338e1 JS	59
776338e1 JS	60	deb_ts("controlling pid parser\n");
77eed219 MK	61	if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
77eed219 MK	62	adap->props.fe[adap->active_fe].caps &
c8b7ced3	63	DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
77eed219 MK	64	adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
	65	ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
	66	adap->fe_adap[adap->active_fe].pid_filtering);
c8b7ced3	67	if (ret < 0) {
776338e1	68	err("could not handle pid_parser");
c8b7ced3 MP	69	return ret;
	70	}
	71	}
776338e1	72	deb_ts("start feeding\n");
77eed219 MK	73	if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
77eed219 MK	74	ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
c8b7ced3	75	if (ret < 0) {
776338e1	76	err("error while enabling fifo.");
c8b7ced3	77	return ret;
776338e1	78	}
c8b7ced3	79	}
776338e1	80
776338e1 JS	81	}
	82	return 0;
	83	}
	84
	85	static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
	86	{
	87	deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
	88	return dvb_usb_ctrl_feed(dvbdmxfeed,1);
	89	}
	90
	91	static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
	92	{
	93	deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
	94	return dvb_usb_ctrl_feed(dvbdmxfeed,0);
	95	}
	96
78e92006	97	int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter adap, short adapter_nums)
776338e1	98	{
77eed219	99	int i;
78e92006 JG	100	int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
	101	adap->dev->owner, &adap->dev->udev->dev,
	102	adapter_nums);
776338e1	103
78e92006	104	if (ret < 0) {
776338e1 JS	105	deb_info("dvb_register_adapter failed: error %d", ret);
	106	goto err;
	107	}
4d43e13f	108	adap->dvb_adap.priv = adap;
94d98314	109	adap->dvb_adap.fe_ioctl_override = adap->props.fe_ioctl_override;
4d43e13f PB	110
	111	if (adap->dev->props.read_mac_address) {
	112	if (adap->dev->props.read_mac_address(adap->dev,adap->dvb_adap.proposed_mac) == 0)
7c510e4b	113	info("MAC address: %pM",adap->dvb_adap.proposed_mac);
776338e1 JS	114	else
	115	err("MAC address reading failed.");
	116	}
	117
	118
4d43e13f PB	119	adap->demux.dmx.capabilities = DMX_TS_FILTERING \| DMX_SECTION_FILTERING;
4d43e13f PB	120	adap->demux.priv = adap;
776338e1	121
77eed219 MK	122	adap->demux.filternum = 0;
	123	for (i = 0; i < adap->props.num_frontends; i++) {
	124	if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
	125	adap->demux.filternum = adap->fe_adap[i].max_feed_count;
	126	}
	127	adap->demux.feednum = adap->demux.filternum;
4d43e13f PB	128	adap->demux.start_feed = dvb_usb_start_feed;
	129	adap->demux.stop_feed = dvb_usb_stop_feed;
	130	adap->demux.write_to_decoder = NULL;
	131	if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
776338e1 JS	132	err("dvb_dmx_init failed: error %d",ret);
	133	goto err_dmx;
	134	}
	135
4d43e13f PB	136	adap->dmxdev.filternum = adap->demux.filternum;
	137	adap->dmxdev.demux = &adap->demux.dmx;
	138	adap->dmxdev.capabilities = 0;
	139	if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
776338e1 JS	140	err("dvb_dmxdev_init failed: error %d",ret);
	141	goto err_dmx_dev;
	142	}
	143
60826f02 JN	144	if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
	145	&adap->demux.dmx)) < 0) {
	146	err("dvb_net_init failed: error %d",ret);
	147	goto err_net_init;
	148	}
776338e1	149
4d43e13f	150	adap->state \|= DVB_USB_ADAP_STATE_DVB;
8397703e TP	151	return 0;
8397703e TP	152
60826f02 JN	153	err_net_init:
60826f02 JN	154	dvb_dmxdev_release(&adap->dmxdev);
776338e1	155	err_dmx_dev:
4d43e13f	156	dvb_dmx_release(&adap->demux);
776338e1	157	err_dmx:
4d43e13f	158	dvb_unregister_adapter(&adap->dvb_adap);
776338e1 JS	159	err:
776338e1 JS	160	return ret;
776338e1 JS	161	}
776338e1 JS	162
4d43e13f	163	int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
776338e1	164	{
4d43e13f	165	if (adap->state & DVB_USB_ADAP_STATE_DVB) {
776338e1	166	deb_info("unregistering DVB part\n");
4d43e13f PB	167	dvb_net_release(&adap->dvb_net);
	168	adap->demux.dmx.close(&adap->demux.dmx);
	169	dvb_dmxdev_release(&adap->dmxdev);
	170	dvb_dmx_release(&adap->demux);
	171	dvb_unregister_adapter(&adap->dvb_adap);
	172	adap->state &= ~DVB_USB_ADAP_STATE_DVB;
776338e1 JS	173	}
	174	return 0;
	175	}
	176
77eed219 MK	177	static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
	178	{
	179	struct dvb_usb_adapter *adap = fe->dvb->priv;
	180
	181	int ret = (adap->props.frontend_ctrl) ?
	182	adap->props.frontend_ctrl(fe, onoff) : 0;
	183
	184	if (ret < 0) {
	185	err("frontend_ctrl request failed");
	186	return ret;
	187	}
	188	if (onoff)
	189	adap->active_fe = fe->id;
	190
	191	return 0;
	192	}
	193
776338e1 JS	194	static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
776338e1 JS	195	{
4d43e13f	196	struct dvb_usb_adapter *adap = fe->dvb->priv;
776338e1	197
4d43e13f	198	dvb_usb_device_power_ctrl(adap->dev, 1);
776338e1	199
77eed219	200	dvb_usb_set_active_fe(fe, 1);
9bd9e3bd	201
77eed219 MK	202	if (adap->fe_adap[fe->id].fe_init)
77eed219 MK	203	adap->fe_adap[fe->id].fe_init(fe);
776338e1 JS	204
	205	return 0;
	206	}
	207
	208	static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
	209	{
4d43e13f	210	struct dvb_usb_adapter *adap = fe->dvb->priv;
776338e1	211
77eed219 MK	212	if (adap->fe_adap[fe->id].fe_sleep)
77eed219 MK	213	adap->fe_adap[fe->id].fe_sleep(fe);
9bd9e3bd	214
77eed219	215	dvb_usb_set_active_fe(fe, 0);
776338e1	216
4d43e13f	217	return dvb_usb_device_power_ctrl(adap->dev, 0);
776338e1 JS	218	}
776338e1 JS	219
4d43e13f	220	int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
776338e1	221	{
77eed219	222	int ret, i;
9bd9e3bd	223
77eed219 MK	224	/* register all given adapter frontends */
77eed219 MK	225	for (i = 0; i < adap->props.num_frontends; i++) {
9bd9e3bd	226
77eed219 MK	227	if (adap->props.fe[i].frontend_attach == NULL) {
	228	err("strange: '%s' #%d,%d "
	229	"doesn't want to attach a frontend.",
	230	adap->dev->desc->name, adap->id, i);
9bd9e3bd	231
77eed219 MK	232	return 0;
77eed219 MK	233	}
776338e1	234
77eed219 MK	235	ret = adap->props.fe[i].frontend_attach(adap);
77eed219 MK	236	if (ret \|\| adap->fe_adap[i].fe == NULL) {
9bd9e3bd AP	237	/* only print error when there is no FE at all */
	238	if (i == 0)
	239	err("no frontend was attached by '%s'",
	240	adap->dev->desc->name);
	241
	242	return 0;
	243	}
776338e1	244
77eed219	245	adap->fe_adap[i].fe->id = i;
9bd9e3bd AP	246
9bd9e3bd AP	247	/* re-assign sleep and wakeup functions */
77eed219 MK	248	adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
	249	adap->fe_adap[i].fe->ops.init = dvb_usb_fe_wakeup;
	250	adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
	251	adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
9bd9e3bd	252
77eed219	253	if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
9bd9e3bd	254	err("Frontend %d registration failed.", i);
77eed219 MK	255	dvb_frontend_detach(adap->fe_adap[i].fe);
77eed219 MK	256	adap->fe_adap[i].fe = NULL;
9bd9e3bd AP	257	/* In error case, do not try register more FEs,
	258	* still leaving already registered FEs alive. */
	259	if (i == 0)
	260	return -ENODEV;
	261	else
	262	return 0;
776338e1	263	}
5a19f312 PB	264
5a19f312 PB	265	/* only attach the tuner if the demod is there */
77eed219 MK	266	if (adap->props.fe[i].tuner_attach != NULL)
	267	adap->props.fe[i].tuner_attach(adap);
	268
	269	adap->num_frontends_initialized++;
9bd9e3bd	270	}
776338e1	271
776338e1 JS	272	return 0;
	273	}
	274
4d43e13f	275	int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
776338e1	276	{
77eed219	277	int i = adap->num_frontends_initialized - 1;
9bd9e3bd AP	278
9bd9e3bd AP	279	/* unregister all given adapter frontends */
9bd9e3bd	280	for (; i >= 0; i--) {
77eed219 MK	281	if (adap->fe_adap[i].fe != NULL) {
	282	dvb_unregister_frontend(adap->fe_adap[i].fe);
	283	dvb_frontend_detach(adap->fe_adap[i].fe);
9bd9e3bd	284	}
4e66c97c	285	}
77eed219	286	adap->num_frontends_initialized = 0;
9bd9e3bd	287
776338e1 JS	288	return 0;
776338e1 JS	289	}