text: /*
   * DVB USB framework
   *
   * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@desy.de>
   * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
   *
   *    This program is free software; you can redistribute it and/or modify
   *    it under the terms of the GNU General Public License as published by
   *    the Free Software Foundation; either version 2 of the License, or
   *    (at your option) any later version.
   *
   *    This program is distributed in the hope that it will be useful,
   *    but WITHOUT ANY WARRANTY; without even the implied warranty of
   *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *    GNU General Public License for more details.
   *
   *    You should have received a copy of the GNU General Public License along
   *    with this program; if not, write to the Free Software Foundation, Inc.,
   *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  
  #include "dvb_usb_common.h"
  
  int dvb_usbv2_disable_rc_polling;
  module_param_named(disable_rc_polling, dvb_usbv2_disable_rc_polling, int, 0644);
  MODULE_PARM_DESC(disable_rc_polling,
  		"disable remote control polling (default: 0)");
  static int dvb_usb_force_pid_filter_usage;
  module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage,
  		int, 0444);
  MODULE_PARM_DESC(force_pid_filter_usage,
  		"force all DVB USB devices to use a PID filter, if any (default: 0)");
  
  static int dvb_usbv2_download_firmware(struct dvb_usb_device *d,
  		const char *name)
  {
  	int ret;
  	const struct firmware *fw;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	if (!d->props->download_firmware) {
  		ret = -EINVAL;
  		goto err;
  	}
  
  	ret = request_firmware(&fw, name, &d->udev->dev);
  	if (ret < 0) {
  		dev_err(&d->udev->dev,
  				"%s: Did not find the firmware file '%s'. Please see linux/Documentation/dvb/ for more details on firmware-problems. Status %d\n",
  				KBUILD_MODNAME, name, ret);
  		goto err;
  	}
  
  	dev_info(&d->udev->dev, "%s: downloading firmware from file '%s'\n",
  			KBUILD_MODNAME, name);
  
  	ret = d->props->download_firmware(d, fw);
  	release_firmware(fw);
  	if (ret < 0)
  		goto err;
  
  	return ret;
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_i2c_init(struct dvb_usb_device *d)
  {
  	int ret;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	if (!d->props->i2c_algo)
  		return 0;
  
  	strlcpy(d->i2c_adap.name, d->name, sizeof(d->i2c_adap.name));
  	d->i2c_adap.algo = d->props->i2c_algo;
  	d->i2c_adap.dev.parent = &d->udev->dev;
  	i2c_set_adapdata(&d->i2c_adap, d);
  
  	ret = i2c_add_adapter(&d->i2c_adap);
  	if (ret < 0) {
  		d->i2c_adap.algo = NULL;
  		dev_err(&d->udev->dev, "%s: i2c_add_adapter() failed=%d\n",
  				KBUILD_MODNAME, ret);
  		goto err;
  	}
  
  	return 0;
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_i2c_exit(struct dvb_usb_device *d)
  {
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	if (d->i2c_adap.algo)
  		i2c_del_adapter(&d->i2c_adap);
  
  	return 0;
  }
  
  #if IS_ENABLED(CPTCFG_RC_CORE)
  static void dvb_usb_read_remote_control(struct work_struct *work)
  {
  	struct dvb_usb_device *d = container_of(work,
  			struct dvb_usb_device, rc_query_work.work);
  	int ret;
  
  	/*
  	 * When the parameter has been set to 1 via sysfs while the
  	 * driver was running, or when bulk mode is enabled after IR init.
  	 */
  	if (dvb_usbv2_disable_rc_polling || d->rc.bulk_mode) {
  		d->rc_polling_active = false;
  		return;
  	}
  
  	ret = d->rc.query(d);
  	if (ret < 0) {
  		dev_err(&d->udev->dev, "%s: rc.query() failed=%d\n",
  				KBUILD_MODNAME, ret);
  		d->rc_polling_active = false;
  		return; /* stop polling */
  	}
  
  	schedule_delayed_work(&d->rc_query_work,
  			msecs_to_jiffies(d->rc.interval));
  }
  
  static int dvb_usbv2_remote_init(struct dvb_usb_device *d)
  {
  	int ret;
  	struct rc_dev *dev;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	if (dvb_usbv2_disable_rc_polling || !d->props->get_rc_config)
  		return 0;
  
  	d->rc.map_name = d->rc_map;
  	ret = d->props->get_rc_config(d, &d->rc);
  	if (ret < 0)
  		goto err;
  
  	/* disable rc when there is no keymap defined */
  	if (!d->rc.map_name)
  		return 0;
  
  	dev = rc_allocate_device();
  	if (!dev) {
  		ret = -ENOMEM;
  		goto err;
  	}
  
  	dev->dev.parent = &d->udev->dev;
  	dev->input_name = d->name;
  	usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
  	strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
  	dev->input_phys = d->rc_phys;
  	usb_to_input_id(d->udev, &dev->input_id);
  	/* TODO: likely RC-core should took const char * */
  	dev->driver_name = (char *) d->props->driver_name;
  	dev->map_name = d->rc.map_name;
  	dev->driver_type = d->rc.driver_type;
  	dev->allowed_protos = d->rc.allowed_protos;
  	dev->change_protocol = d->rc.change_protocol;
  	dev->priv = d;
  
  	ret = rc_register_device(dev);
  	if (ret < 0) {
  		rc_free_device(dev);
  		goto err;
  	}
  
  	d->rc_dev = dev;
  
  	/* start polling if needed */
  	if (d->rc.query && !d->rc.bulk_mode) {
  		/* initialize a work queue for handling polling */
  		INIT_DELAYED_WORK(&d->rc_query_work,
  				dvb_usb_read_remote_control);
  		dev_info(&d->udev->dev,
  				"%s: schedule remote query interval to %d msecs\n",
  				KBUILD_MODNAME, d->rc.interval);
  		schedule_delayed_work(&d->rc_query_work,
  				msecs_to_jiffies(d->rc.interval));
  		d->rc_polling_active = true;
  	}
  
  	return 0;
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_remote_exit(struct dvb_usb_device *d)
  {
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	if (d->rc_dev) {
  		cancel_delayed_work_sync(&d->rc_query_work);
  		rc_unregister_device(d->rc_dev);
  		d->rc_dev = NULL;
  	}
  
  	return 0;
  }
  #else
  	#define dvb_usbv2_remote_init(args...) 0
  	#define dvb_usbv2_remote_exit(args...)
  #endif
  
  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);
  }
  
  static int dvb_usbv2_adapter_stream_init(struct dvb_usb_adapter *adap)
  {
  	dev_dbg(&adap_to_d(adap)->udev->dev, "%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);
  }
  
  static int dvb_usbv2_adapter_stream_exit(struct dvb_usb_adapter *adap)
  {
  	dev_dbg(&adap_to_d(adap)->udev->dev, "%s: adap=%d\n", __func__,
  			adap->id);
  
  	return usb_urb_exitv2(&adap->stream);
  }
  
  static int wait_schedule(void *ptr)
  {
  	schedule();
  
  	return 0;
  }
  
  static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  {
  	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  	struct dvb_usb_device *d = adap_to_d(adap);
  	int ret = 0;
  	struct usb_data_stream_properties stream_props;
  	dev_dbg(&d->udev->dev,
  			"%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: %04x (%04d) at index %d\n",
  			__func__, adap->id, adap->active_fe, dvbdmxfeed->type,
  			adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
  			dvbdmxfeed->pid, dvbdmxfeed->index);
  
  	/* wait init is done */
  	wait_on_bit(&adap->state_bits, ADAP_INIT, wait_schedule,
  			TASK_UNINTERRUPTIBLE);
  
  	if (adap->active_fe == -1)
  		return -EINVAL;
  
  	/* skip feed setup if we are already feeding */
  	if (adap->feed_count++ > 0)
  		goto skip_feed_start;
  
  	/* set 'streaming' status bit */
  	set_bit(ADAP_STREAMING, &adap->state_bits);
  
  	/* resolve input and output streaming parameters */
  	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)
  			dev_err(&d->udev->dev,
  					"%s: get_stream_config() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	} 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;
  	}
  
  	/* submit USB streaming packets */
  	usb_urb_submitv2(&adap->stream, &stream_props);
  
  	/* enable HW PID filter */
  	if (adap->pid_filtering && adap->props->pid_filter_ctrl) {
  		ret = adap->props->pid_filter_ctrl(adap, 1);
  		if (ret)
  			dev_err(&d->udev->dev,
  					"%s: pid_filter_ctrl() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  
  	/* ask device to start streaming */
  	if (d->props->streaming_ctrl) {
  		ret = d->props->streaming_ctrl(adap->fe[adap->active_fe], 1);
  		if (ret)
  			dev_err(&d->udev->dev,
  					"%s: streaming_ctrl() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  skip_feed_start:
  
  	/* add PID to device HW PID filter */
  	if (adap->pid_filtering && adap->props->pid_filter) {
  		ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
  				dvbdmxfeed->pid, 1);
  		if (ret)
  			dev_err(&d->udev->dev, "%s: pid_filter() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  
  	if (ret)
  		dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  {
  	struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  	struct dvb_usb_device *d = adap_to_d(adap);
  	int ret = 0;
  	dev_dbg(&d->udev->dev,
  			"%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: %04x (%04d) at index %d\n",
  			__func__, adap->id, adap->active_fe, dvbdmxfeed->type,
  			adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
  			dvbdmxfeed->pid, dvbdmxfeed->index);
  
  	if (adap->active_fe == -1)
  		return -EINVAL;
  
  	/* remove PID from device HW PID filter */
  	if (adap->pid_filtering && adap->props->pid_filter) {
  		ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
  				dvbdmxfeed->pid, 0);
  		if (ret)
  			dev_err(&d->udev->dev, "%s: pid_filter() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  
  	/* we cannot stop streaming until last PID is removed */
  	if (--adap->feed_count > 0)
  		goto skip_feed_stop;
  
  	/* ask device to stop streaming */
  	if (d->props->streaming_ctrl) {
  		ret = d->props->streaming_ctrl(adap->fe[adap->active_fe], 0);
  		if (ret)
  			dev_err(&d->udev->dev,
  					"%s: streaming_ctrl() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  
  	/* disable HW PID filter */
  	if (adap->pid_filtering && adap->props->pid_filter_ctrl) {
  		ret = adap->props->pid_filter_ctrl(adap, 0);
  		if (ret)
  			dev_err(&d->udev->dev,
  					"%s: pid_filter_ctrl() failed=%d\n",
  					KBUILD_MODNAME, ret);
  	}
  
  	/* kill USB streaming packets */
  	usb_urb_killv2(&adap->stream);
  
  	/* clear 'streaming' status bit */
  	clear_bit(ADAP_STREAMING, &adap->state_bits);
  	smp_mb__after_clear_bit();
  	wake_up_bit(&adap->state_bits, ADAP_STREAMING);
  skip_feed_stop:
  
  	if (ret)
  		dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
  {
  	int ret;
  	struct dvb_usb_device *d = adap_to_d(adap);
  	dev_dbg(&d->udev->dev, "%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) {
  		dev_dbg(&d->udev->dev, "%s: dvb_register_adapter() failed=%d\n",
  				__func__, ret);
  		goto err_dvb_register_adapter;
  	}
  
  	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_dvb_dmx_init;
  
  		dev_info(&d->udev->dev, "%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;
  	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) {
  		dev_err(&d->udev->dev, "%s: dvb_dmx_init() failed=%d\n",
  				KBUILD_MODNAME, ret);
  		goto err_dvb_dmx_init;
  	}
  
  	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) {
  		dev_err(&d->udev->dev, "%s: dvb_dmxdev_init() failed=%d\n",
  				KBUILD_MODNAME, ret);
  		goto err_dvb_dmxdev_init;
  	}
  
  	ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
  	if (ret < 0) {
  		dev_err(&d->udev->dev, "%s: dvb_net_init() failed=%d\n",
  				KBUILD_MODNAME, ret);
  		goto err_dvb_net_init;
  	}
  
  	return 0;
  err_dvb_net_init:
  	dvb_dmxdev_release(&adap->dmxdev);
  err_dvb_dmxdev_init:
  	dvb_dmx_release(&adap->demux);
  err_dvb_dmx_init:
  	dvb_unregister_adapter(&adap->dvb_adap);
  err_dvb_register_adapter:
  	adap->dvb_adap.priv = NULL;
  	return ret;
  }
  
  static int dvb_usbv2_adapter_dvb_exit(struct dvb_usb_adapter *adap)
  {
  	dev_dbg(&adap_to_d(adap)->udev->dev, "%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_usbv2_device_power_ctrl(struct dvb_usb_device *d, int onoff)
  {
  	int ret;
  
  	if (onoff)
  		d->powered++;
  	else
  		d->powered--;
  
  	if (d->powered == 0 || (onoff && d->powered == 1)) {
  		/* when switching from 1 to 0 or from 0 to 1 */
  		dev_dbg(&d->udev->dev, "%s: power=%d\n", __func__, onoff);
  		if (d->props->power_ctrl) {
  			ret = d->props->power_ctrl(d, onoff);
  			if (ret < 0)
  				goto err;
  		}
  	}
  
  	return 0;
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usb_fe_init(struct dvb_frontend *fe)
  {
  	int ret;
  	struct dvb_usb_adapter *adap = fe->dvb->priv;
  	struct dvb_usb_device *d = adap_to_d(adap);
  	dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
  			fe->id);
  
  	if (!adap->suspend_resume_active) {
  		adap->active_fe = fe->id;
  		set_bit(ADAP_INIT, &adap->state_bits);
  	}
  
  	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;
  	}
  err:
  	if (!adap->suspend_resume_active) {
  		clear_bit(ADAP_INIT, &adap->state_bits);
  		smp_mb__after_clear_bit();
  		wake_up_bit(&adap->state_bits, ADAP_INIT);
  	}
  
  	dev_dbg(&d->udev->dev, "%s: ret=%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);
  	dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
  			fe->id);
  
  	if (!adap->suspend_resume_active) {
  		set_bit(ADAP_SLEEP, &adap->state_bits);
  		wait_on_bit(&adap->state_bits, ADAP_STREAMING, wait_schedule,
  				TASK_UNINTERRUPTIBLE);
  	}
  
  	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;
  err:
  	if (!adap->suspend_resume_active) {
  		adap->active_fe = -1;
  		clear_bit(ADAP_SLEEP, &adap->state_bits);
  		smp_mb__after_clear_bit();
  		wake_up_bit(&adap->state_bits, ADAP_SLEEP);
  	}
  
  	dev_dbg(&d->udev->dev, "%s: ret=%d\n", __func__, ret);
  	return ret;
  }
  
  static 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);
  	dev_dbg(&d->udev->dev, "%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) {
  			dev_dbg(&d->udev->dev,
  					"%s: frontend_attach() failed=%d\n",
  					__func__, ret);
  			goto err_dvb_frontend_detach;
  		}
  	} else {
  		dev_dbg(&d->udev->dev, "%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_init;
  		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) {
  			dev_err(&d->udev->dev,
  					"%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) {
  			dev_dbg(&d->udev->dev, "%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]);
  			adap->fe[i] = NULL;
  		}
  	}
  
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_adapter_frontend_exit(struct dvb_usb_adapter *adap)
  {
  	int i;
  	dev_dbg(&adap_to_d(adap)->udev->dev, "%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;
  }
  
  static int dvb_usbv2_adapter_init(struct dvb_usb_device *d)
  {
  	struct dvb_usb_adapter *adap;
  	int ret, i, adapter_count;
  
  	/* resolve adapter count */
  	adapter_count = d->props->num_adapters;
  	if (d->props->get_adapter_count) {
  		ret = d->props->get_adapter_count(d);
  		if (ret < 0)
  			goto err;
  
  		adapter_count = ret;
  	}
  
  	for (i = 0; i < adapter_count; i++) {
  		adap = &d->adapter[i];
  		adap->id = i;
  		adap->props = &d->props->adapter[i];
  
  		/* speed - when running at FULL speed we need a HW PID filter */
  		if (d->udev->speed == USB_SPEED_FULL &&
  				!(adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
  			dev_err(&d->udev->dev,
  					"%s: this USB2.0 device cannot be run on a USB1.1 port (it lacks a hardware PID filter)\n",
  					KBUILD_MODNAME);
  			ret = -ENODEV;
  			goto err;
  		} else if ((d->udev->speed == USB_SPEED_FULL &&
  				adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
  				(adap->props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
  			dev_info(&d->udev->dev,
  					"%s: will use the device's hardware PID filter (table count: %d)\n",
  					KBUILD_MODNAME,
  					adap->props->pid_filter_count);
  			adap->pid_filtering  = 1;
  			adap->max_feed_count = adap->props->pid_filter_count;
  		} else {
  			dev_info(&d->udev->dev,
  					"%s: will pass the complete MPEG2 transport stream to the software demuxer\n",
  					KBUILD_MODNAME);
  			adap->pid_filtering  = 0;
  			adap->max_feed_count = 255;
  		}
  
  		if (!adap->pid_filtering && dvb_usb_force_pid_filter_usage &&
  				adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER) {
  			dev_info(&d->udev->dev,
  					"%s: PID filter enabled by module option\n",
  					KBUILD_MODNAME);
  			adap->pid_filtering  = 1;
  			adap->max_feed_count = adap->props->pid_filter_count;
  		}
  
  		ret = dvb_usbv2_adapter_stream_init(adap);
  		if (ret)
  			goto err;
  
  		ret = dvb_usbv2_adapter_dvb_init(adap);
  		if (ret)
  			goto err;
  
  		ret = dvb_usbv2_adapter_frontend_init(adap);
  		if (ret)
  			goto err;
  
  		/* use exclusive FE lock if there is multiple shared FEs */
  		if (adap->fe[1])
  			adap->dvb_adap.mfe_shared = 1;
  	}
  
  	return 0;
  err:
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  static int dvb_usbv2_adapter_exit(struct dvb_usb_device *d)
  {
  	int i;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	for (i = MAX_NO_OF_ADAPTER_PER_DEVICE - 1; i >= 0; i--) {
  		if (d->adapter[i].props) {
  			dvb_usbv2_adapter_frontend_exit(&d->adapter[i]);
  			dvb_usbv2_adapter_dvb_exit(&d->adapter[i]);
  			dvb_usbv2_adapter_stream_exit(&d->adapter[i]);
  		}
  	}
  
  	return 0;
  }
  
  /* general initialization functions */
  static int dvb_usbv2_exit(struct dvb_usb_device *d)
  {
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	dvb_usbv2_remote_exit(d);
  	dvb_usbv2_adapter_exit(d);
  	dvb_usbv2_i2c_exit(d);
  	kfree(d->priv);
  	kfree(d);
  
  	return 0;
  }
  
  static int dvb_usbv2_init(struct dvb_usb_device *d)
  {
  	int ret;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	dvb_usbv2_device_power_ctrl(d, 1);
  
  	if (d->props->read_config) {
  		ret = d->props->read_config(d);
  		if (ret < 0)
  			goto err;
  	}
  
  	ret = dvb_usbv2_i2c_init(d);
  	if (ret < 0)
  		goto err;
  
  	ret = dvb_usbv2_adapter_init(d);
  	if (ret < 0)
  		goto err;
  
  	if (d->props->init) {
  		ret = d->props->init(d);
  		if (ret < 0)
  			goto err;
  	}
  
  	ret = dvb_usbv2_remote_init(d);
  	if (ret < 0)
  		goto err;
  
  	dvb_usbv2_device_power_ctrl(d, 0);
  
  	return 0;
  err:
  	dvb_usbv2_device_power_ctrl(d, 0);
  	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  
  int dvb_usbv2_probe(struct usb_interface *intf,
  		const struct usb_device_id *id)
  {
  	int ret;
  	struct dvb_usb_device *d;
  	struct usb_device *udev = interface_to_usbdev(intf);
  	struct dvb_usb_driver_info *driver_info =
  			(struct dvb_usb_driver_info *) id->driver_info;
  
  	dev_dbg(&udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
  			intf->cur_altsetting->desc.bInterfaceNumber);
  
  	if (!id->driver_info) {
  		dev_err(&udev->dev, "%s: driver_info failed\n", KBUILD_MODNAME);
  		ret = -ENODEV;
  		goto err;
  	}
  
  	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
  	if (!d) {
  		dev_err(&udev->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
  		ret = -ENOMEM;
  		goto err;
  	}
  
  	d->name = driver_info->name;
  	d->rc_map = driver_info->rc_map;
  	d->udev = udev;
  	d->props = driver_info->props;
  
  	if (intf->cur_altsetting->desc.bInterfaceNumber !=
  			d->props->bInterfaceNumber) {
  		ret = -ENODEV;
  		goto err_free_all;
  	}
  
  	mutex_init(&d->usb_mutex);
  	mutex_init(&d->i2c_mutex);
  
  	if (d->props->size_of_priv) {
  		d->priv = kzalloc(d->props->size_of_priv, GFP_KERNEL);
  		if (!d->priv) {
  			dev_err(&d->udev->dev, "%s: kzalloc() failed\n",
  					KBUILD_MODNAME);
  			ret = -ENOMEM;
  			goto err_free_all;
  		}
  	}
  
  	if (d->props->identify_state) {
  		const char *name = NULL;
  		ret = d->props->identify_state(d, &name);
  		if (ret == 0) {
  			;
  		} else if (ret == COLD) {
  			dev_info(&d->udev->dev,
  					"%s: found a '%s' in cold state\n",
  					KBUILD_MODNAME, d->name);
  
  			if (!name)
  				name = d->props->firmware;
  
  			ret = dvb_usbv2_download_firmware(d, name);
  			if (ret == 0) {
  				/* device is warm, continue initialization */
  				;
  			} else if (ret == RECONNECTS_USB) {
  				/*
  				 * USB core will call disconnect() and then
  				 * probe() as device reconnects itself from the
  				 * USB bus. disconnect() will release all driver
  				 * resources and probe() is called for 'new'
  				 * device. As 'new' device is warm we should
  				 * never go here again.
  				 */
  				goto exit;
  			} else {
  				goto err_free_all;
  			}
  		} else {
  			goto err_free_all;
  		}
  	}
  
  	dev_info(&d->udev->dev, "%s: found a '%s' in warm state\n",
  			KBUILD_MODNAME, d->name);
  
  	ret = dvb_usbv2_init(d);
  	if (ret < 0)
  		goto err_free_all;
  
  	dev_info(&d->udev->dev,
  			"%s: '%s' successfully initialized and connected\n",
  			KBUILD_MODNAME, d->name);
  exit:
  	usb_set_intfdata(intf, d);
  
  	return 0;
  err_free_all:
  	dvb_usbv2_exit(d);
  err:
  	dev_dbg(&udev->dev, "%s: failed=%d\n", __func__, ret);
  	return ret;
  }
  EXPORT_SYMBOL(dvb_usbv2_probe);
  
  void dvb_usbv2_disconnect(struct usb_interface *intf)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	const char *name = d->name;
  	struct device dev = d->udev->dev;
  	dev_dbg(&d->udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
  			intf->cur_altsetting->desc.bInterfaceNumber);
  
  	if (d->props->exit)
  		d->props->exit(d);
  
  	dvb_usbv2_exit(d);
  
  	dev_info(&dev, "%s: '%s' successfully deinitialized and disconnected\n",
  			KBUILD_MODNAME, name);
  }
  EXPORT_SYMBOL(dvb_usbv2_disconnect);
  
  int dvb_usbv2_suspend(struct usb_interface *intf, pm_message_t msg)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	int ret = 0, i, active_fe;
  	struct dvb_frontend *fe;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	/* stop remote controller poll */
  	if (d->rc_polling_active)
  		cancel_delayed_work_sync(&d->rc_query_work);
  
  	for (i = MAX_NO_OF_ADAPTER_PER_DEVICE - 1; i >= 0; i--) {
  		active_fe = d->adapter[i].active_fe;
  		if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
  			fe = d->adapter[i].fe[active_fe];
  			d->adapter[i].suspend_resume_active = true;
  
  			if (d->props->streaming_ctrl)
  				d->props->streaming_ctrl(fe, 0);
  
  			/* stop usb streaming */
  			usb_urb_killv2(&d->adapter[i].stream);
  
  			ret = dvb_frontend_suspend(fe);
  		}
  	}
  
  	return ret;
  }
  EXPORT_SYMBOL(dvb_usbv2_suspend);
  
  static int dvb_usbv2_resume_common(struct dvb_usb_device *d)
  {
  	int ret = 0, i, active_fe;
  	struct dvb_frontend *fe;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	for (i = 0; i < MAX_NO_OF_ADAPTER_PER_DEVICE; i++) {
  		active_fe = d->adapter[i].active_fe;
  		if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
  			fe = d->adapter[i].fe[active_fe];
  
  			ret = dvb_frontend_resume(fe);
  
  			/* resume usb streaming */
  			usb_urb_submitv2(&d->adapter[i].stream, NULL);
  
  			if (d->props->streaming_ctrl)
  				d->props->streaming_ctrl(fe, 1);
  
  			d->adapter[i].suspend_resume_active = false;
  		}
  	}
  
  	/* start remote controller poll */
  	if (d->rc_polling_active)
  		schedule_delayed_work(&d->rc_query_work,
  				msecs_to_jiffies(d->rc.interval));
  
  	return ret;
  }
  
  int dvb_usbv2_resume(struct usb_interface *intf)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	return dvb_usbv2_resume_common(d);
  }
  EXPORT_SYMBOL(dvb_usbv2_resume);
  
  int dvb_usbv2_reset_resume(struct usb_interface *intf)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	int ret;
  	dev_dbg(&d->udev->dev, "%s:\n", __func__);
  
  	dvb_usbv2_device_power_ctrl(d, 1);
  
  	if (d->props->init)
  		d->props->init(d);
  
  	ret = dvb_usbv2_resume_common(d);
  
  	dvb_usbv2_device_power_ctrl(d, 0);
  
  	return ret;
  }
  EXPORT_SYMBOL(dvb_usbv2_reset_resume);
  
  MODULE_VERSION("2.0");
  MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
  MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
  MODULE_DESCRIPTION("DVB USB common");
  MODULE_LICENSE("GPL");
  