drivers/media/dvb/dvb-usb/dvb_usb_init.c - kernel/msm-4.9 - Gitiles

 /*
  * DVB USB library - provides a generic interface for a DVB USB device driver.
  *
  * dvb-usb-init.c
  *
  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
  *
  *	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, version 2.
  *
  * see Documentation/dvb/README.dvb-usb for more information
  */
 #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).");

 int dvb_usbv2_download_firmware(struct dvb_usb_device *d)
 {
 	int ret;
 	const struct firmware *fw = NULL;
 	const char *name;

 	/* resolve firmware name */
 	name = d->props.firmware;
 	if (d->props.get_firmware_name) {
 		ret = d->props.get_firmware_name(d, &name);
 		if (ret < 0)
 			return ret;
 	}

 	if (!d->props.download_firmware) {
 		ret = -EINVAL;
 		goto err;
 	}

 	ret = request_firmware(&fw, name, &d->udev->dev);
 	if (ret < 0) {
 		pr_err("%s: did not find the firmware file. (%s) " \
 				"Please see linux/Documentation/dvb/ for " \
 				"more details on firmware-problems. (%d)\n",
 				KBUILD_MODNAME, name, ret);
 		goto err;
 	}

 	pr_info("%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 0;
 err:
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 int dvb_usbv2_i2c_init(struct dvb_usb_device *d)
 {
 	int ret = 0;

 	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.algo_data = NULL;
 	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)
 		pr_err("%s: could not add i2c adapter\n", KBUILD_MODNAME);

 	d->state |= DVB_USB_STATE_I2C;

 	return ret;
 }

 int dvb_usbv2_i2c_exit(struct dvb_usb_device *d)
 {
 	if (d->state & DVB_USB_STATE_I2C)
 		i2c_del_adapter(&d->i2c_adap);
 	d->state &= ~DVB_USB_STATE_I2C;
 	return 0;
 }

 static int dvb_usbv2_adapter_init(struct dvb_usb_device *d)
 {
 	struct dvb_usb_adapter *adap;
 	int ret, n, 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 (n = 0; n < adapter_count; n++) {
 		adap = &d->adapter[n];
 		adap->dev = d;
 		adap->id  = n;

 		memcpy(&adap->props, &d->props.adapter[n],
 				sizeof(struct dvb_usb_adapter_properties));

 		/* 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)) {
 			pr_err("%s: this USB2.0 device cannot be run on a " \
 					"USB1.1 port (it lacks a hardware " \
 					"PID filter)\n", KBUILD_MODNAME);
 			return -ENODEV;
 		} 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)) {
 			pr_info("%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 {
 			pr_info("%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) {
 			pr_info("%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)
 			return ret;

 		ret = dvb_usbv2_adapter_dvb_init(adap);
 		if (ret)
 			return ret;

 		ret = dvb_usbv2_adapter_frontend_init(adap);
 		if (ret)
 			return ret;

 		/* use exclusive FE lock if there is multiple shared FEs */
 		if (adap->fe[1])
 			adap->dvb_adap.mfe_shared = 1;

 		d->num_adapters_initialized++;
 		d->state |= DVB_USB_STATE_DVB;
 	}

 	return 0;
 err:
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static int dvb_usbv2_adapter_exit(struct dvb_usb_device *d)
 {
 	int n;

 	for (n = 0; n < d->num_adapters_initialized; n++) {
 		dvb_usbv2_adapter_frontend_exit(&d->adapter[n]);
 		dvb_usbv2_adapter_dvb_exit(&d->adapter[n]);
 		dvb_usbv2_adapter_stream_exit(&d->adapter[n]);

 	}
 	d->num_adapters_initialized = 0;
 	d->state &= ~DVB_USB_STATE_DVB;
 	return 0;
 }

 /* general initialization functions */
 static int dvb_usbv2_exit(struct dvb_usb_device *d)
 {
 	pr_debug("%s: state before exiting everything: %x\n", __func__, d->state);
 	dvb_usbv2_remote_exit(d);
 	dvb_usbv2_adapter_exit(d);
 	dvb_usbv2_i2c_exit(d);
 	pr_debug("%s: state should be zero now: %x\n", __func__, d->state);
 	d->state = DVB_USB_STATE_INIT;
 	kfree(d->priv);
 	kfree(d);
 	return 0;
 }

 static int dvb_usbv2_init(struct dvb_usb_device *d)
 {
 	int ret = 0;

 	d->state = DVB_USB_STATE_INIT;

 	/* check the capabilities and set appropriate variables */
 	dvb_usbv2_device_power_ctrl(d, 1);

 	/* read config */
 	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)
 		ret = dvb_usbv2_adapter_init(d);

 	if (ret) {
 		dvb_usbv2_exit(d);
 		return ret;
 	}

 	if (d->props.init)
 		d->props.init(d);

 	ret = dvb_usbv2_remote_init(d);
 	if (ret)
 		pr_err("%s: could not initialize remote control\n",
 				KBUILD_MODNAME);

 	dvb_usbv2_device_power_ctrl(d, 0);

 	return 0;
 err:
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 int dvb_usbv2_device_power_ctrl(struct dvb_usb_device *d, int onoff)
 {
 	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 */
 		pr_debug("%s: power control: %d\n", __func__, onoff);
 		if (d->props.power_ctrl)
 			return d->props.power_ctrl(d, onoff);
 	}
 	return 0;
 }

 /*
  * udev, which is used for the firmware downloading, requires we cannot
  * block during module_init(). module_init() calls USB probe() which
  * is this routine. Due to that we delay actual operation using workqueue
  * and return always success here.
  */

 static void dvb_usbv2_init_work(struct work_struct *work)
 {
 	int ret;
 	struct dvb_usb_device *d =
 			container_of(work, struct dvb_usb_device, probe_work);
 	bool cold = false;

 	d->work_pid = current->pid;

 	pr_debug("%s: work_pid=%d\n", __func__, d->work_pid);

 	if (d->props.size_of_priv) {
 		d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
 		if (!d->priv) {
 			pr_err("%s: kzalloc() failed\n", KBUILD_MODNAME);
 			ret = -ENOMEM;
 			goto err_usb_driver_release_interface;
 		}
 	}

 	if (d->props.identify_state) {
 		ret = d->props.identify_state(d);
 		if (ret == 0) {
 			;
 		} else if (ret == COLD) {
 			cold = true;
 			ret = 0;
 		} else {
 			goto err_usb_driver_release_interface;
 		}
 	}

 	if (cold) {
 		pr_info("%s: found a '%s' in cold state\n",
 				KBUILD_MODNAME, d->name);
 		ret = dvb_usbv2_download_firmware(d);
 		if (ret == 0) {
 			;
 		} else if (ret == RECONNECTS_USB) {
 			ret = 0;
 			goto exit_usb_driver_release_interface;
 		} else {
 			goto err_usb_driver_release_interface;
 		}
 	}

 	pr_info("%s: found a '%s' in warm state\n", KBUILD_MODNAME, d->name);

 	ret = dvb_usbv2_init(d);
 	if (ret < 0)
 		goto err_usb_driver_release_interface;

 	pr_info("%s: '%s' successfully initialized and connected\n",
 			KBUILD_MODNAME, d->name);

 	return;
 err_usb_driver_release_interface:
 	pr_info("%s: '%s' error while loading driver (%d)\n", KBUILD_MODNAME,
 			d->name, ret);
 exit_usb_driver_release_interface:
 	/* it finally calls .disconnect() which frees mem */
 	usb_driver_release_interface(to_usb_driver(d->intf->dev.driver),
 			d->intf);
 	pr_debug("%s: failed=%d\n", __func__, ret);
 	return;
 }

 int dvb_usbv2_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	int ret;
 	struct dvb_usb_device *d;
 	struct dvb_usb_driver_info *driver_info =
 			(struct dvb_usb_driver_info *) id->driver_info;

 	pr_debug("%s: bInterfaceNumber=%d\n", __func__,
 			intf->cur_altsetting->desc.bInterfaceNumber);

 	if (!id->driver_info) {
 		pr_err("%s: driver_info failed\n", KBUILD_MODNAME);
 		ret = -ENODEV;
 		goto err;
 	}

 	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
 	if (!d) {
 		pr_err("%s: kzalloc() failed\n", KBUILD_MODNAME);
 		ret = -ENOMEM;
 		goto err;
 	}

 	d->name = driver_info->name;
 	d->rc_map = driver_info->rc_map;
 	d->udev = interface_to_usbdev(intf);
 	d->intf = intf;
 	memcpy(&d->props, driver_info->props,
 			sizeof(struct dvb_usb_device_properties));

 	if (d->intf->cur_altsetting->desc.bInterfaceNumber !=
 			d->props.bInterfaceNumber) {
 		ret = 0;
 		goto exit_kfree;
 	}

 	mutex_init(&d->usb_mutex);
 	mutex_init(&d->i2c_mutex);
 	INIT_WORK(&d->probe_work, dvb_usbv2_init_work);
 	usb_set_intfdata(intf, d);
 	ret = schedule_work(&d->probe_work);
 	if (ret < 0) {
 		pr_err("%s: schedule_work() failed\n", KBUILD_MODNAME);
 		goto err_kfree;
 	}

 	return 0;
 err_kfree:
 	usb_set_intfdata(intf, NULL);
 exit_kfree:
 	kfree(d);
 err:
 	pr_debug("%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 = "generic DVB-USB module";

 	pr_debug("%s: pid=%d work_pid=%d\n", __func__, current->pid,
 			d->work_pid);

 	/* ensure initialization work is finished until release resources */
 	if (d->work_pid != current->pid)
 		cancel_work_sync(&d->probe_work);

 	usb_set_intfdata(intf, NULL);
 	if (d) {
 		name = d->name;
 		dvb_usbv2_exit(d);
 	}

 	pr_info("%s: '%s' successfully deinitialized and disconnected\n",
 			KBUILD_MODNAME, name);
 }
 EXPORT_SYMBOL(dvb_usbv2_disconnect);

 MODULE_VERSION("1.0");
 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 MODULE_LICENSE("GPL");
	/*
	* DVB USB library - provides a generic interface for a DVB USB device driver.
	*
	* dvb-usb-init.c
	*
	* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
	*
	* 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, version 2.
	*
	* see Documentation/dvb/README.dvb-usb for more information
	*/
	#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).");

	int dvb_usbv2_download_firmware(struct dvb_usb_device *d)
	{
	int ret;
	const struct firmware *fw = NULL;
	const char *name;

	/* resolve firmware name */
	name = d->props.firmware;
	if (d->props.get_firmware_name) {
	ret = d->props.get_firmware_name(d, &name);
	if (ret < 0)
	return ret;
	}

	if (!d->props.download_firmware) {
	ret = -EINVAL;
	goto err;
	}

	ret = request_firmware(&fw, name, &d->udev->dev);
	if (ret < 0) {
	pr_err("%s: did not find the firmware file. (%s) " \
	"Please see linux/Documentation/dvb/ for " \
	"more details on firmware-problems. (%d)\n",
	KBUILD_MODNAME, name, ret);
	goto err;
	}

	pr_info("%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 0;
	err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	int dvb_usbv2_i2c_init(struct dvb_usb_device *d)
	{
	int ret = 0;

	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.algo_data = NULL;
	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)
	pr_err("%s: could not add i2c adapter\n", KBUILD_MODNAME);

	d->state \|= DVB_USB_STATE_I2C;

	return ret;
	}

	int dvb_usbv2_i2c_exit(struct dvb_usb_device *d)
	{
	if (d->state & DVB_USB_STATE_I2C)
	i2c_del_adapter(&d->i2c_adap);
	d->state &= ~DVB_USB_STATE_I2C;
	return 0;
	}

	static int dvb_usbv2_adapter_init(struct dvb_usb_device *d)
	{
	struct dvb_usb_adapter *adap;
	int ret, n, 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 (n = 0; n < adapter_count; n++) {
	adap = &d->adapter[n];
	adap->dev = d;
	adap->id = n;

	memcpy(&adap->props, &d->props.adapter[n],
	sizeof(struct dvb_usb_adapter_properties));

	/* 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)) {
	pr_err("%s: this USB2.0 device cannot be run on a " \
	"USB1.1 port (it lacks a hardware " \
	"PID filter)\n", KBUILD_MODNAME);
	return -ENODEV;
	} 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)) {
	pr_info("%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 {
	pr_info("%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) {
	pr_info("%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)
	return ret;

	ret = dvb_usbv2_adapter_dvb_init(adap);
	if (ret)
	return ret;

	ret = dvb_usbv2_adapter_frontend_init(adap);
	if (ret)
	return ret;

	/* use exclusive FE lock if there is multiple shared FEs */
	if (adap->fe[1])
	adap->dvb_adap.mfe_shared = 1;

	d->num_adapters_initialized++;
	d->state \|= DVB_USB_STATE_DVB;
	}

	return 0;
	err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static int dvb_usbv2_adapter_exit(struct dvb_usb_device *d)
	{
	int n;

	for (n = 0; n < d->num_adapters_initialized; n++) {
	dvb_usbv2_adapter_frontend_exit(&d->adapter[n]);
	dvb_usbv2_adapter_dvb_exit(&d->adapter[n]);
	dvb_usbv2_adapter_stream_exit(&d->adapter[n]);

	}
	d->num_adapters_initialized = 0;
	d->state &= ~DVB_USB_STATE_DVB;
	return 0;
	}

	/* general initialization functions */
	static int dvb_usbv2_exit(struct dvb_usb_device *d)
	{
	pr_debug("%s: state before exiting everything: %x\n", __func__, d->state);
	dvb_usbv2_remote_exit(d);
	dvb_usbv2_adapter_exit(d);
	dvb_usbv2_i2c_exit(d);
	pr_debug("%s: state should be zero now: %x\n", __func__, d->state);
	d->state = DVB_USB_STATE_INIT;
	kfree(d->priv);
	kfree(d);
	return 0;
	}

	static int dvb_usbv2_init(struct dvb_usb_device *d)
	{
	int ret = 0;

	d->state = DVB_USB_STATE_INIT;

	/* check the capabilities and set appropriate variables */
	dvb_usbv2_device_power_ctrl(d, 1);

	/* read config */
	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)
	ret = dvb_usbv2_adapter_init(d);

	if (ret) {
	dvb_usbv2_exit(d);
	return ret;
	}

	if (d->props.init)
	d->props.init(d);

	ret = dvb_usbv2_remote_init(d);
	if (ret)
	pr_err("%s: could not initialize remote control\n",
	KBUILD_MODNAME);

	dvb_usbv2_device_power_ctrl(d, 0);

	return 0;
	err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
	}

	int dvb_usbv2_device_power_ctrl(struct dvb_usb_device *d, int onoff)
	{
	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 */
	pr_debug("%s: power control: %d\n", __func__, onoff);
	if (d->props.power_ctrl)
	return d->props.power_ctrl(d, onoff);
	}
	return 0;
	}

	/*
	* udev, which is used for the firmware downloading, requires we cannot
	* block during module_init(). module_init() calls USB probe() which
	* is this routine. Due to that we delay actual operation using workqueue
	* and return always success here.
	*/

	static void dvb_usbv2_init_work(struct work_struct *work)
	{
	int ret;
	struct dvb_usb_device *d =
	container_of(work, struct dvb_usb_device, probe_work);
	bool cold = false;

	d->work_pid = current->pid;

	pr_debug("%s: work_pid=%d\n", __func__, d->work_pid);

	if (d->props.size_of_priv) {
	d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
	if (!d->priv) {
	pr_err("%s: kzalloc() failed\n", KBUILD_MODNAME);
	ret = -ENOMEM;
	goto err_usb_driver_release_interface;
	}
	}

	if (d->props.identify_state) {
	ret = d->props.identify_state(d);
	if (ret == 0) {
	;
	} else if (ret == COLD) {
	cold = true;
	ret = 0;
	} else {
	goto err_usb_driver_release_interface;
	}
	}

	if (cold) {
	pr_info("%s: found a '%s' in cold state\n",
	KBUILD_MODNAME, d->name);
	ret = dvb_usbv2_download_firmware(d);
	if (ret == 0) {
	;
	} else if (ret == RECONNECTS_USB) {
	ret = 0;
	goto exit_usb_driver_release_interface;
	} else {
	goto err_usb_driver_release_interface;
	}
	}

	pr_info("%s: found a '%s' in warm state\n", KBUILD_MODNAME, d->name);

	ret = dvb_usbv2_init(d);
	if (ret < 0)
	goto err_usb_driver_release_interface;

	pr_info("%s: '%s' successfully initialized and connected\n",
	KBUILD_MODNAME, d->name);

	return;
	err_usb_driver_release_interface:
	pr_info("%s: '%s' error while loading driver (%d)\n", KBUILD_MODNAME,
	d->name, ret);
	exit_usb_driver_release_interface:
	/* it finally calls .disconnect() which frees mem */
	usb_driver_release_interface(to_usb_driver(d->intf->dev.driver),
	d->intf);
	pr_debug("%s: failed=%d\n", __func__, ret);
	return;
	}

	int dvb_usbv2_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	int ret;
	struct dvb_usb_device *d;
	struct dvb_usb_driver_info *driver_info =
	(struct dvb_usb_driver_info *) id->driver_info;

	pr_debug("%s: bInterfaceNumber=%d\n", __func__,
	intf->cur_altsetting->desc.bInterfaceNumber);

	if (!id->driver_info) {
	pr_err("%s: driver_info failed\n", KBUILD_MODNAME);
	ret = -ENODEV;
	goto err;
	}

	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
	if (!d) {
	pr_err("%s: kzalloc() failed\n", KBUILD_MODNAME);
	ret = -ENOMEM;
	goto err;
	}

	d->name = driver_info->name;
	d->rc_map = driver_info->rc_map;
	d->udev = interface_to_usbdev(intf);
	d->intf = intf;
	memcpy(&d->props, driver_info->props,
	sizeof(struct dvb_usb_device_properties));

	if (d->intf->cur_altsetting->desc.bInterfaceNumber !=
	d->props.bInterfaceNumber) {
	ret = 0;
	goto exit_kfree;
	}

	mutex_init(&d->usb_mutex);
	mutex_init(&d->i2c_mutex);
	INIT_WORK(&d->probe_work, dvb_usbv2_init_work);
	usb_set_intfdata(intf, d);
	ret = schedule_work(&d->probe_work);
	if (ret < 0) {
	pr_err("%s: schedule_work() failed\n", KBUILD_MODNAME);
	goto err_kfree;
	}

	return 0;
	err_kfree:
	usb_set_intfdata(intf, NULL);
	exit_kfree:
	kfree(d);
	err:
	pr_debug("%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 = "generic DVB-USB module";

	pr_debug("%s: pid=%d work_pid=%d\n", __func__, current->pid,
	d->work_pid);

	/* ensure initialization work is finished until release resources */
	if (d->work_pid != current->pid)
	cancel_work_sync(&d->probe_work);

	usb_set_intfdata(intf, NULL);
	if (d) {
	name = d->name;
	dvb_usbv2_exit(d);
	}

	pr_info("%s: '%s' successfully deinitialized and disconnected\n",
	KBUILD_MODNAME, name);
	}
	EXPORT_SYMBOL(dvb_usbv2_disconnect);

	MODULE_VERSION("1.0");
	MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
	MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
	MODULE_LICENSE("GPL");