drivers/media/usb/dvb-usb/dvb_usb_dvb.c - kernel/quantenna - Git at Google

 /* 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"

 static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buf,
 		size_t len)
 {
 	struct dvb_usb_adapter *adap = stream->user_priv;
 	dvb_dmx_swfilter(&adap->demux, buf, len);
 }

 static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buf,
 		size_t len)
 {
 	struct dvb_usb_adapter *adap = stream->user_priv;
 	dvb_dmx_swfilter_204(&adap->demux, buf, len);
 }

 static void dvb_usb_data_complete_raw(struct usb_data_stream *stream, u8 *buf,
 		size_t len)
 {
 	struct dvb_usb_adapter *adap = stream->user_priv;
 	dvb_dmx_swfilter_raw(&adap->demux, buf, len);
 }

 int dvb_usbv2_adapter_stream_init(struct dvb_usb_adapter *adap)
 {
 	pr_debug("%s: adap=%d\n", __func__, adap->id);

 	adap->stream.udev = adap_to_d(adap)->udev;
 	adap->stream.user_priv = adap;
 	adap->stream.complete = dvb_usb_data_complete;

 	return usb_urb_initv2(&adap->stream, &adap->props->stream);
 }

 int dvb_usbv2_adapter_stream_exit(struct dvb_usb_adapter *adap)
 {
 	pr_debug("%s: adap=%d\n", __func__, adap->id);
 	usb_urb_exitv2(&adap->stream);

 	return 0;
 }

 /* does the complete input transfer handling */
 static inline int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int count)
 {
 	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
 	struct dvb_usb_device *d = adap_to_d(adap);
 	int ret;
 	pr_debug("%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: " \
 			"%04x (%04d) at index %d '%s'\n", __func__, adap->id,
 			adap->active_fe, dvbdmxfeed->type,
 			adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
 			dvbdmxfeed->pid, dvbdmxfeed->index,
 			(count == 1) ? "on" : "off");

 	if (adap->active_fe == -1)
 		return -EINVAL;

 	adap->feed_count += count;

 	/* stop feeding if it is last pid */
 	if (adap->feed_count == 0) {
 		pr_debug("%s: stop feeding\n", __func__);
 		usb_urb_killv2(&adap->stream);

 		if (d->props->streaming_ctrl) {
 			ret = d->props->streaming_ctrl(adap, 0);
 			if (ret < 0) {
 				pr_err("%s: streaming_ctrl() failed=%d\n",
 						KBUILD_MODNAME, ret);
 				goto err_mutex_unlock;
 			}
 		}
 		mutex_unlock(&adap->sync_mutex);
 	}

 	/* activate the pid on the device pid filter */
 	if (adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER &&
 			adap->pid_filtering &&
 			adap->props->pid_filter)
 		ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
 				dvbdmxfeed->pid, (count == 1) ? 1 : 0);
 			if (ret < 0)
 				pr_err("%s: pid_filter() failed=%d\n",
 						KBUILD_MODNAME, ret);

 	/* start feeding if it is first pid */
 	if (adap->feed_count == 1 && count == 1) {
 		struct usb_data_stream_properties stream_props;
 		mutex_lock(&adap->sync_mutex);
 		pr_debug("%s: start feeding\n", __func__);

 		/* resolve input and output streaming paramters */
 		if (d->props->get_stream_config) {
 			memcpy(&stream_props, &adap->props->stream,
 				sizeof(struct usb_data_stream_properties));
 			ret = d->props->get_stream_config(
 					adap->fe[adap->active_fe],
 					&adap->ts_type, &stream_props);
 			if (ret < 0)
 				goto err_mutex_unlock;
 		} else {
 			stream_props = adap->props->stream;
 		}

 		switch (adap->ts_type) {
 		case DVB_USB_FE_TS_TYPE_204:
 			adap->stream.complete = dvb_usb_data_complete_204;
 			break;
 		case DVB_USB_FE_TS_TYPE_RAW:
 			adap->stream.complete = dvb_usb_data_complete_raw;
 			break;
 		case DVB_USB_FE_TS_TYPE_188:
 		default:
 			adap->stream.complete = dvb_usb_data_complete;
 			break;
 		}

 		usb_urb_submitv2(&adap->stream, &stream_props);

 		if (adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER &&
 				adap->props->caps &
 				DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
 				adap->props->pid_filter_ctrl) {
 			ret = adap->props->pid_filter_ctrl(adap,
 					adap->pid_filtering);
 			if (ret < 0) {
 				pr_err("%s: pid_filter_ctrl() failed=%d\n",
 						KBUILD_MODNAME, ret);
 				goto err_mutex_unlock;
 			}
 		}

 		if (d->props->streaming_ctrl) {
 			ret = d->props->streaming_ctrl(adap, 1);
 			if (ret < 0) {
 				pr_err("%s: streaming_ctrl() failed=%d\n",
 						KBUILD_MODNAME, ret);
 				goto err_mutex_unlock;
 			}
 		}
 	}

 	return 0;
 err_mutex_unlock:
 	mutex_unlock(&adap->sync_mutex);
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 {
 	return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
 }

 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 {
 	return dvb_usb_ctrl_feed(dvbdmxfeed, -1);
 }

 int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
 {
 	int ret;
 	struct dvb_usb_device *d = adap_to_d(adap);
 	pr_debug("%s: adap=%d\n", __func__, adap->id);

 	ret = dvb_register_adapter(&adap->dvb_adap, d->name, d->props->owner,
 			&d->udev->dev, d->props->adapter_nr);
 	if (ret < 0) {
 		pr_debug("%s: dvb_register_adapter() failed=%d\n", __func__,
 				ret);
 		goto err;
 	}

 	adap->dvb_adap.priv = adap;

 	if (d->props->read_mac_address) {
 		ret = d->props->read_mac_address(adap,
 				adap->dvb_adap.proposed_mac);
 		if (ret < 0)
 			goto err_dmx;

 		pr_info("%s: MAC address: %pM\n", KBUILD_MODNAME,
 				adap->dvb_adap.proposed_mac);
 	}

 	adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 	adap->demux.priv             = adap;
 	adap->demux.filternum        = 0;
 	if (adap->demux.filternum < adap->max_feed_count)
 		adap->demux.filternum = adap->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;
 	ret = dvb_dmx_init(&adap->demux);
 	if (ret < 0) {
 		pr_err("%s: dvb_dmx_init() failed=%d\n", KBUILD_MODNAME, ret);
 		goto err_dmx;
 	}

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

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

 	mutex_init(&adap->sync_mutex);

 	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:
 	adap->dvb_adap.priv = NULL;
 	return ret;
 }

 int dvb_usbv2_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 {
 	pr_debug("%s: adap=%d\n", __func__, adap->id);

 	if (adap->dvb_adap.priv) {
 		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);
 	}

 	return 0;
 }

 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 {
 	int ret;
 	struct dvb_usb_adapter *adap = fe->dvb->priv;
 	struct dvb_usb_device *d = adap_to_d(adap);
 	mutex_lock(&adap->sync_mutex);
 	pr_debug("%s: adap=%d fe=%d\n", __func__, adap->id, fe->id);

 	ret = dvb_usbv2_device_power_ctrl(d, 1);
 	if (ret < 0)
 		goto err;

 	if (d->props->frontend_ctrl) {
 		ret = d->props->frontend_ctrl(fe, 1);
 		if (ret < 0)
 			goto err;
 	}

 	if (adap->fe_init[fe->id]) {
 		ret = adap->fe_init[fe->id](fe);
 		if (ret < 0)
 			goto err;
 	}

 	adap->active_fe = fe->id;
 	mutex_unlock(&adap->sync_mutex);

 	return 0;
 err:
 	mutex_unlock(&adap->sync_mutex);
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 {
 	int ret;
 	struct dvb_usb_adapter *adap = fe->dvb->priv;
 	struct dvb_usb_device *d = adap_to_d(adap);
 	mutex_lock(&adap->sync_mutex);
 	pr_debug("%s: adap=%d fe=%d\n", __func__, adap->id, fe->id);

 	if (adap->fe_sleep[fe->id]) {
 		ret = adap->fe_sleep[fe->id](fe);
 		if (ret < 0)
 			goto err;
 	}

 	if (d->props->frontend_ctrl) {
 		ret = d->props->frontend_ctrl(fe, 0);
 		if (ret < 0)
 			goto err;
 	}

 	ret = dvb_usbv2_device_power_ctrl(d, 0);
 	if (ret < 0)
 		goto err;

 	adap->active_fe = -1;
 	mutex_unlock(&adap->sync_mutex);

 	return 0;
 err:
 	mutex_unlock(&adap->sync_mutex);
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
 {
 	int ret, i, count_registered = 0;
 	struct dvb_usb_device *d = adap_to_d(adap);
 	pr_debug("%s: adap=%d\n", __func__, adap->id);

 	memset(adap->fe, 0, sizeof(adap->fe));
 	adap->active_fe = -1;

 	if (d->props->frontend_attach) {
 		ret = d->props->frontend_attach(adap);
 		if (ret < 0) {
 			pr_debug("%s: frontend_attach() failed=%d\n", __func__,
 					ret);
 			goto err_dvb_frontend_detach;
 		}
 	} else {
 		pr_debug("%s: frontend_attach() do not exists\n", __func__);
 		ret = 0;
 		goto err;
 	}

 	for (i = 0; i < MAX_NO_OF_FE_PER_ADAP && adap->fe[i]; i++) {
 		adap->fe[i]->id = i;

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

 		ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]);
 		if (ret < 0) {
 			pr_err("%s: frontend%d registration failed\n",
 					KBUILD_MODNAME, i);
 			goto err_dvb_unregister_frontend;
 		}

 		count_registered++;
 	}

 	if (d->props->tuner_attach) {
 		ret = d->props->tuner_attach(adap);
 		if (ret < 0) {
 			pr_debug("%s: tuner_attach() failed=%d\n", __func__,
 					ret);
 			goto err_dvb_unregister_frontend;
 		}
 	}

 	return 0;

 err_dvb_unregister_frontend:
 	for (i = count_registered - 1; i >= 0; i--)
 		dvb_unregister_frontend(adap->fe[i]);

 err_dvb_frontend_detach:
 	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
 		if (adap->fe[i])
 			dvb_frontend_detach(adap->fe[i]);
 	}

 err:
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 int dvb_usbv2_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 {
 	int i;
 	pr_debug("%s: adap=%d\n", __func__, adap->id);

 	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
 		if (adap->fe[i]) {
 			dvb_unregister_frontend(adap->fe[i]);
 			dvb_frontend_detach(adap->fe[i]);
 		}
 	}

 	return 0;
 }
	/* 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"

	static void dvb_usb_data_complete(struct usb_data_stream stream, u8 buf,
	size_t len)
	{
	struct dvb_usb_adapter *adap = stream->user_priv;
	dvb_dmx_swfilter(&adap->demux, buf, len);
	}

	static void dvb_usb_data_complete_204(struct usb_data_stream stream, u8 buf,
	size_t len)
	{
	struct dvb_usb_adapter *adap = stream->user_priv;
	dvb_dmx_swfilter_204(&adap->demux, buf, len);
	}

	static void dvb_usb_data_complete_raw(struct usb_data_stream stream, u8 buf,
	size_t len)
	{
	struct dvb_usb_adapter *adap = stream->user_priv;
	dvb_dmx_swfilter_raw(&adap->demux, buf, len);
	}

	int dvb_usbv2_adapter_stream_init(struct dvb_usb_adapter *adap)
	{
	pr_debug("%s: adap=%d\n", __func__, adap->id);

	adap->stream.udev = adap_to_d(adap)->udev;
	adap->stream.user_priv = adap;
	adap->stream.complete = dvb_usb_data_complete;

	return usb_urb_initv2(&adap->stream, &adap->props->stream);
	}

	int dvb_usbv2_adapter_stream_exit(struct dvb_usb_adapter *adap)
	{
	pr_debug("%s: adap=%d\n", __func__, adap->id);
	usb_urb_exitv2(&adap->stream);

	return 0;
	}

	/* does the complete input transfer handling */
	static inline int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int count)
	{
	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
	struct dvb_usb_device *d = adap_to_d(adap);
	int ret;
	pr_debug("%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: " \
	"%04x (%04d) at index %d '%s'\n", __func__, adap->id,
	adap->active_fe, dvbdmxfeed->type,
	adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
	dvbdmxfeed->pid, dvbdmxfeed->index,
	(count == 1) ? "on" : "off");

	if (adap->active_fe == -1)
	return -EINVAL;

	adap->feed_count += count;

	/* stop feeding if it is last pid */
	if (adap->feed_count == 0) {
	pr_debug("%s: stop feeding\n", __func__);
	usb_urb_killv2(&adap->stream);

	if (d->props->streaming_ctrl) {
	ret = d->props->streaming_ctrl(adap, 0);
	if (ret < 0) {
	pr_err("%s: streaming_ctrl() failed=%d\n",
	KBUILD_MODNAME, ret);
	goto err_mutex_unlock;
	}
	}
	mutex_unlock(&adap->sync_mutex);
	}

	/* activate the pid on the device pid filter */
	if (adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER &&
	adap->pid_filtering &&
	adap->props->pid_filter)
	ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
	dvbdmxfeed->pid, (count == 1) ? 1 : 0);
	if (ret < 0)
	pr_err("%s: pid_filter() failed=%d\n",
	KBUILD_MODNAME, ret);

	/* start feeding if it is first pid */
	if (adap->feed_count == 1 && count == 1) {
	struct usb_data_stream_properties stream_props;
	mutex_lock(&adap->sync_mutex);
	pr_debug("%s: start feeding\n", __func__);

	/* resolve input and output streaming paramters */
	if (d->props->get_stream_config) {
	memcpy(&stream_props, &adap->props->stream,
	sizeof(struct usb_data_stream_properties));
	ret = d->props->get_stream_config(
	adap->fe[adap->active_fe],
	&adap->ts_type, &stream_props);
	if (ret < 0)
	goto err_mutex_unlock;
	} else {
	stream_props = adap->props->stream;
	}

	switch (adap->ts_type) {
	case DVB_USB_FE_TS_TYPE_204:
	adap->stream.complete = dvb_usb_data_complete_204;
	break;
	case DVB_USB_FE_TS_TYPE_RAW:
	adap->stream.complete = dvb_usb_data_complete_raw;
	break;
	case DVB_USB_FE_TS_TYPE_188:
	default:
	adap->stream.complete = dvb_usb_data_complete;
	break;
	}

	usb_urb_submitv2(&adap->stream, &stream_props);

	if (adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER &&
	adap->props->caps &
	DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
	adap->props->pid_filter_ctrl) {
	ret = adap->props->pid_filter_ctrl(adap,
	adap->pid_filtering);
	if (ret < 0) {
	pr_err("%s: pid_filter_ctrl() failed=%d\n",
	KBUILD_MODNAME, ret);
	goto err_mutex_unlock;
	}
	}

	if (d->props->streaming_ctrl) {
	ret = d->props->streaming_ctrl(adap, 1);
	if (ret < 0) {
	pr_err("%s: streaming_ctrl() failed=%d\n",
	KBUILD_MODNAME, ret);
	goto err_mutex_unlock;
	}
	}
	}

	return 0;
	err_mutex_unlock:
	mutex_unlock(&adap->sync_mutex);
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
	{
	return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
	}

	static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
	{
	return dvb_usb_ctrl_feed(dvbdmxfeed, -1);
	}

	int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
	{
	int ret;
	struct dvb_usb_device *d = adap_to_d(adap);
	pr_debug("%s: adap=%d\n", __func__, adap->id);

	ret = dvb_register_adapter(&adap->dvb_adap, d->name, d->props->owner,
	&d->udev->dev, d->props->adapter_nr);
	if (ret < 0) {
	pr_debug("%s: dvb_register_adapter() failed=%d\n", __func__,
	ret);
	goto err;
	}

	adap->dvb_adap.priv = adap;

	if (d->props->read_mac_address) {
	ret = d->props->read_mac_address(adap,
	adap->dvb_adap.proposed_mac);
	if (ret < 0)
	goto err_dmx;

	pr_info("%s: MAC address: %pM\n", KBUILD_MODNAME,
	adap->dvb_adap.proposed_mac);
	}

	adap->demux.dmx.capabilities = DMX_TS_FILTERING \| DMX_SECTION_FILTERING;
	adap->demux.priv = adap;
	adap->demux.filternum = 0;
	if (adap->demux.filternum < adap->max_feed_count)
	adap->demux.filternum = adap->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;
	ret = dvb_dmx_init(&adap->demux);
	if (ret < 0) {
	pr_err("%s: dvb_dmx_init() failed=%d\n", KBUILD_MODNAME, ret);
	goto err_dmx;
	}

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

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

	mutex_init(&adap->sync_mutex);

	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:
	adap->dvb_adap.priv = NULL;
	return ret;
	}

	int dvb_usbv2_adapter_dvb_exit(struct dvb_usb_adapter *adap)
	{
	pr_debug("%s: adap=%d\n", __func__, adap->id);

	if (adap->dvb_adap.priv) {
	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);
	}

	return 0;
	}

	static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
	{
	int ret;
	struct dvb_usb_adapter *adap = fe->dvb->priv;
	struct dvb_usb_device *d = adap_to_d(adap);
	mutex_lock(&adap->sync_mutex);
	pr_debug("%s: adap=%d fe=%d\n", __func__, adap->id, fe->id);

	ret = dvb_usbv2_device_power_ctrl(d, 1);
	if (ret < 0)
	goto err;

	if (d->props->frontend_ctrl) {
	ret = d->props->frontend_ctrl(fe, 1);
	if (ret < 0)
	goto err;
	}

	if (adap->fe_init[fe->id]) {
	ret = adap->fe_init[fe->id](fe);
	if (ret < 0)
	goto err;
	}

	adap->active_fe = fe->id;
	mutex_unlock(&adap->sync_mutex);

	return 0;
	err:
	mutex_unlock(&adap->sync_mutex);
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
	{
	int ret;
	struct dvb_usb_adapter *adap = fe->dvb->priv;
	struct dvb_usb_device *d = adap_to_d(adap);
	mutex_lock(&adap->sync_mutex);
	pr_debug("%s: adap=%d fe=%d\n", __func__, adap->id, fe->id);

	if (adap->fe_sleep[fe->id]) {
	ret = adap->fe_sleep[fe->id](fe);
	if (ret < 0)
	goto err;
	}

	if (d->props->frontend_ctrl) {
	ret = d->props->frontend_ctrl(fe, 0);
	if (ret < 0)
	goto err;
	}

	ret = dvb_usbv2_device_power_ctrl(d, 0);
	if (ret < 0)
	goto err;

	adap->active_fe = -1;
	mutex_unlock(&adap->sync_mutex);

	return 0;
	err:
	mutex_unlock(&adap->sync_mutex);
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
	{
	int ret, i, count_registered = 0;
	struct dvb_usb_device *d = adap_to_d(adap);
	pr_debug("%s: adap=%d\n", __func__, adap->id);

	memset(adap->fe, 0, sizeof(adap->fe));
	adap->active_fe = -1;

	if (d->props->frontend_attach) {
	ret = d->props->frontend_attach(adap);
	if (ret < 0) {
	pr_debug("%s: frontend_attach() failed=%d\n", __func__,
	ret);
	goto err_dvb_frontend_detach;
	}
	} else {
	pr_debug("%s: frontend_attach() do not exists\n", __func__);
	ret = 0;
	goto err;
	}

	for (i = 0; i < MAX_NO_OF_FE_PER_ADAP && adap->fe[i]; i++) {
	adap->fe[i]->id = i;

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

	ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]);
	if (ret < 0) {
	pr_err("%s: frontend%d registration failed\n",
	KBUILD_MODNAME, i);
	goto err_dvb_unregister_frontend;
	}

	count_registered++;
	}

	if (d->props->tuner_attach) {
	ret = d->props->tuner_attach(adap);
	if (ret < 0) {
	pr_debug("%s: tuner_attach() failed=%d\n", __func__,
	ret);
	goto err_dvb_unregister_frontend;
	}
	}

	return 0;

	err_dvb_unregister_frontend:
	for (i = count_registered - 1; i >= 0; i--)
	dvb_unregister_frontend(adap->fe[i]);

	err_dvb_frontend_detach:
	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
	if (adap->fe[i])
	dvb_frontend_detach(adap->fe[i]);
	}

	err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	int dvb_usbv2_adapter_frontend_exit(struct dvb_usb_adapter *adap)
	{
	int i;
	pr_debug("%s: adap=%d\n", __func__, adap->id);

	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
	if (adap->fe[i]) {
	dvb_unregister_frontend(adap->fe[i]);
	dvb_frontend_detach(adap->fe[i]);
	}
	}

	return 0;
	}