drivers/media/dvb/dvb-usb/dvb-usb-init.c - maze/linux - Git at Google

 /*
  * 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"

 /* debug */
 int dvb_usb_debug;
 module_param_named(debug, dvb_usb_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64,mem=128,uxfer=256  (or-able))." DVB_USB_DEBUG_STATUS);

 int dvb_usb_disable_rc_polling;
 module_param_named(disable_rc_polling, dvb_usb_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_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
 {
 	struct dvb_usb_adapter *adap;
 	int ret, n;

 	for (n = 0; n < d->props.num_adapters; 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)) {
 			err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
 			return -ENODEV;
 		}

 		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)) {
 			info("will use the device's hardware PID filter (table count: %d).", adap->props.pid_filter_count);
 			adap->pid_filtering  = 1;
 			adap->max_feed_count = adap->props.pid_filter_count;
 		} else {
 			info("will pass the complete MPEG2 transport stream to the software demuxer.");
 			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) {
 			info("pid filter enabled by module option.");
 			adap->pid_filtering  = 1;
 			adap->max_feed_count = adap->props.pid_filter_count;
 		}

 		if (adap->props.size_of_priv > 0) {
 			adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);
 			if (adap->priv == NULL) {
 				err("no memory for priv for adapter %d.", n);
 				return -ENOMEM;
 			}
 		}

 		if ((ret = dvb_usb_adapter_stream_init(adap)) ||
 			(ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) ||
 			(ret = dvb_usb_adapter_frontend_init(adap))) {
 			return ret;
 		}

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

 	/*
 	 * when reloading the driver w/o replugging the device
 	 * sometimes a timeout occures, this helps
 	 */
 	if (d->props.generic_bulk_ctrl_endpoint != 0) {
 		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
 		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
 	}

 	return 0;
 }

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

 	for (n = 0; n < d->num_adapters_initialized; n++) {
 		dvb_usb_adapter_frontend_exit(&d->adapter[n]);
 		dvb_usb_adapter_dvb_exit(&d->adapter[n]);
 		dvb_usb_adapter_stream_exit(&d->adapter[n]);
 		kfree(d->adapter[n].priv);
 	}
 	d->num_adapters_initialized = 0;
 	d->state &= ~DVB_USB_STATE_DVB;
 	return 0;
 }


 /* general initialization functions */
 static int dvb_usb_exit(struct dvb_usb_device *d)
 {
 	deb_info("state before exiting everything: %x\n", d->state);
 	dvb_usb_remote_exit(d);
 	dvb_usb_adapter_exit(d);
 	dvb_usb_i2c_exit(d);
 	deb_info("state should be zero now: %x\n", d->state);
 	d->state = DVB_USB_STATE_INIT;
 	kfree(d->priv);
 	kfree(d);
 	return 0;
 }

 static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums)
 {
 	int ret = 0;

 	mutex_init(&d->usb_mutex);
 	mutex_init(&d->i2c_mutex);

 	d->state = DVB_USB_STATE_INIT;

 	if (d->props.size_of_priv > 0) {
 		d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
 		if (d->priv == NULL) {
 			err("no memory for priv in 'struct dvb_usb_device'");
 			return -ENOMEM;
 		}
 	}

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

 	if ((ret = dvb_usb_i2c_init(d)) ||
 		(ret = dvb_usb_adapter_init(d, adapter_nums))) {
 		dvb_usb_exit(d);
 		return ret;
 	}

 	if ((ret = dvb_usb_remote_init(d)))
 		err("could not initialize remote control.");

 	dvb_usb_device_power_ctrl(d, 0);

 	return 0;
 }

 /* determine the name and the state of the just found USB device */
 static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold)
 {
 	int i, j;
 	struct dvb_usb_device_description *desc = NULL;

 	*cold = -1;

 	for (i = 0; i < props->num_device_descs; i++) {

 		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
 			deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
 			if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
 				props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 				*cold = 1;
 				desc = &props->devices[i];
 				break;
 			}
 		}

 		if (desc != NULL)
 			break;

 		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
 			deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
 			if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
 				props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 				*cold = 0;
 				desc = &props->devices[i];
 				break;
 			}
 		}
 	}

 	if (desc != NULL && props->identify_state != NULL)
 		props->identify_state(udev, props, &desc, cold);

 	return desc;
 }

 int dvb_usb_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 */
 		deb_info("power control: %d\n", onoff);
 		if (d->props.power_ctrl)
 			return d->props.power_ctrl(d, onoff);
 	}
 	return 0;
 }

 /*
  * USB
  */
 int dvb_usb_device_init(struct usb_interface *intf,
 			struct dvb_usb_device_properties *props,
 			struct module *owner, struct dvb_usb_device **du,
 			short *adapter_nums)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct dvb_usb_device *d = NULL;
 	struct dvb_usb_device_description *desc = NULL;

 	int ret = -ENOMEM, cold = 0;

 	if (du != NULL)
 		*du = NULL;

 	if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) {
 		deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
 		return -ENODEV;
 	}

 	if (cold) {
 		info("found a '%s' in cold state, will try to load a firmware", desc->name);
 		ret = dvb_usb_download_firmware(udev, props);
 		if (!props->no_reconnect || ret != 0)
 			return ret;
 	}

 	info("found a '%s' in warm state.", desc->name);
 	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
 	if (d == NULL) {
 		err("no memory for 'struct dvb_usb_device'");
 		return -ENOMEM;
 	}

 	d->udev = udev;
 	memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
 	d->desc = desc;
 	d->owner = owner;

 	usb_set_intfdata(intf, d);

 	if (du != NULL)
 		*du = d;

 	ret = dvb_usb_init(d, adapter_nums);

 	if (ret == 0)
 		info("%s successfully initialized and connected.", desc->name);
 	else
 		info("%s error while loading driver (%d)", desc->name, ret);
 	return ret;
 }
 EXPORT_SYMBOL(dvb_usb_device_init);

 void dvb_usb_device_exit(struct usb_interface *intf)
 {
 	struct dvb_usb_device *d = usb_get_intfdata(intf);
 	const char *name = "generic DVB-USB module";

 	usb_set_intfdata(intf, NULL);
 	if (d != NULL && d->desc != NULL) {
 		name = d->desc->name;
 		dvb_usb_exit(d);
 	}
 	info("%s successfully deinitialized and disconnected.", name);

 }
 EXPORT_SYMBOL(dvb_usb_device_exit);

 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"

	/* debug */
	int dvb_usb_debug;
	module_param_named(debug, dvb_usb_debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64,mem=128,uxfer=256 (or-able))." DVB_USB_DEBUG_STATUS);

	int dvb_usb_disable_rc_polling;
	module_param_named(disable_rc_polling, dvb_usb_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_usb_adapter_init(struct dvb_usb_device d, short adapter_nrs)
	{
	struct dvb_usb_adapter *adap;
	int ret, n;

	for (n = 0; n < d->props.num_adapters; 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)) {
	err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
	return -ENODEV;
	}

	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)) {
	info("will use the device's hardware PID filter (table count: %d).", adap->props.pid_filter_count);
	adap->pid_filtering = 1;
	adap->max_feed_count = adap->props.pid_filter_count;
	} else {
	info("will pass the complete MPEG2 transport stream to the software demuxer.");
	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) {
	info("pid filter enabled by module option.");
	adap->pid_filtering = 1;
	adap->max_feed_count = adap->props.pid_filter_count;
	}

	if (adap->props.size_of_priv > 0) {
	adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);
	if (adap->priv == NULL) {
	err("no memory for priv for adapter %d.", n);
	return -ENOMEM;
	}
	}

	if ((ret = dvb_usb_adapter_stream_init(adap)) \|\|
	(ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) \|\|
	(ret = dvb_usb_adapter_frontend_init(adap))) {
	return ret;
	}

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

	/*
	* when reloading the driver w/o replugging the device
	* sometimes a timeout occures, this helps
	*/
	if (d->props.generic_bulk_ctrl_endpoint != 0) {
	usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
	usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
	}

	return 0;
	}

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

	for (n = 0; n < d->num_adapters_initialized; n++) {
	dvb_usb_adapter_frontend_exit(&d->adapter[n]);
	dvb_usb_adapter_dvb_exit(&d->adapter[n]);
	dvb_usb_adapter_stream_exit(&d->adapter[n]);
	kfree(d->adapter[n].priv);
	}
	d->num_adapters_initialized = 0;
	d->state &= ~DVB_USB_STATE_DVB;
	return 0;
	}


	/* general initialization functions */
	static int dvb_usb_exit(struct dvb_usb_device *d)
	{
	deb_info("state before exiting everything: %x\n", d->state);
	dvb_usb_remote_exit(d);
	dvb_usb_adapter_exit(d);
	dvb_usb_i2c_exit(d);
	deb_info("state should be zero now: %x\n", d->state);
	d->state = DVB_USB_STATE_INIT;
	kfree(d->priv);
	kfree(d);
	return 0;
	}

	static int dvb_usb_init(struct dvb_usb_device d, short adapter_nums)
	{
	int ret = 0;

	mutex_init(&d->usb_mutex);
	mutex_init(&d->i2c_mutex);

	d->state = DVB_USB_STATE_INIT;

	if (d->props.size_of_priv > 0) {
	d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
	if (d->priv == NULL) {
	err("no memory for priv in 'struct dvb_usb_device'");
	return -ENOMEM;
	}
	}

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

	if ((ret = dvb_usb_i2c_init(d)) \|\|
	(ret = dvb_usb_adapter_init(d, adapter_nums))) {
	dvb_usb_exit(d);
	return ret;
	}

	if ((ret = dvb_usb_remote_init(d)))
	err("could not initialize remote control.");

	dvb_usb_device_power_ctrl(d, 0);

	return 0;
	}

	/* determine the name and the state of the just found USB device */
	static struct dvb_usb_device_description dvb_usb_find_device(struct usb_device udev, struct dvb_usb_device_properties props, int cold)
	{
	int i, j;
	struct dvb_usb_device_description *desc = NULL;

	*cold = -1;

	for (i = 0; i < props->num_device_descs; i++) {

	for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
	deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
	if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
	props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
	*cold = 1;
	desc = &props->devices[i];
	break;
	}
	}

	if (desc != NULL)
	break;

	for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
	deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
	if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
	props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
	*cold = 0;
	desc = &props->devices[i];
	break;
	}
	}
	}

	if (desc != NULL && props->identify_state != NULL)
	props->identify_state(udev, props, &desc, cold);

	return desc;
	}

	int dvb_usb_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 */
	deb_info("power control: %d\n", onoff);
	if (d->props.power_ctrl)
	return d->props.power_ctrl(d, onoff);
	}
	return 0;
	}

	/*
	* USB
	*/
	int dvb_usb_device_init(struct usb_interface *intf,
	struct dvb_usb_device_properties *props,
	struct module owner, struct dvb_usb_device *du,
	short *adapter_nums)
	{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct dvb_usb_device *d = NULL;
	struct dvb_usb_device_description *desc = NULL;

	int ret = -ENOMEM, cold = 0;

	if (du != NULL)
	*du = NULL;

	if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) {
	deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
	return -ENODEV;
	}

	if (cold) {
	info("found a '%s' in cold state, will try to load a firmware", desc->name);
	ret = dvb_usb_download_firmware(udev, props);
	if (!props->no_reconnect \|\| ret != 0)
	return ret;
	}

	info("found a '%s' in warm state.", desc->name);
	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
	if (d == NULL) {
	err("no memory for 'struct dvb_usb_device'");
	return -ENOMEM;
	}

	d->udev = udev;
	memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
	d->desc = desc;
	d->owner = owner;

	usb_set_intfdata(intf, d);

	if (du != NULL)
	*du = d;

	ret = dvb_usb_init(d, adapter_nums);

	if (ret == 0)
	info("%s successfully initialized and connected.", desc->name);
	else
	info("%s error while loading driver (%d)", desc->name, ret);
	return ret;
	}
	EXPORT_SYMBOL(dvb_usb_device_init);

	void dvb_usb_device_exit(struct usb_interface *intf)
	{
	struct dvb_usb_device *d = usb_get_intfdata(intf);
	const char *name = "generic DVB-USB module";

	usb_set_intfdata(intf, NULL);
	if (d != NULL && d->desc != NULL) {
	name = d->desc->name;
	dvb_usb_exit(d);
	}
	info("%s successfully deinitialized and disconnected.", name);

	}
	EXPORT_SYMBOL(dvb_usb_device_exit);

	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");