drivers/staging/tm6000/tm6000-dvb.c - kernel/skids - Git at Google

 /*
    tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices

    Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>

    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

    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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/usb.h>

 #include "tm6000.h"
 #include "tm6000-regs.h"

 #include "zl10353.h"

 #include <media/tuner.h>

 #include "tuner-xc2028.h"
 #include "xc5000.h"

 static void inline print_err_status (struct tm6000_core *dev,
 				     int packet, int status)
 {
 	char *errmsg = "Unknown";

 	switch(status) {
 	case -ENOENT:
 		errmsg = "unlinked synchronuously";
 		break;
 	case -ECONNRESET:
 		errmsg = "unlinked asynchronuously";
 		break;
 	case -ENOSR:
 		errmsg = "Buffer error (overrun)";
 		break;
 	case -EPIPE:
 		errmsg = "Stalled (device not responding)";
 		break;
 	case -EOVERFLOW:
 		errmsg = "Babble (bad cable?)";
 		break;
 	case -EPROTO:
 		errmsg = "Bit-stuff error (bad cable?)";
 		break;
 	case -EILSEQ:
 		errmsg = "CRC/Timeout (could be anything)";
 		break;
 	case -ETIME:
 		errmsg = "Device does not respond";
 		break;
 	}
 	if (packet<0) {
 		dprintk(dev, 1, "URB status %d [%s].\n",
 			status, errmsg);
 	} else {
 		dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
 			packet, status, errmsg);
 	}
 }

 static void tm6000_urb_received(struct urb *urb)
 {
 	int ret;
 	struct tm6000_core* dev = urb->context;

 	if(urb->status != 0) {
 		print_err_status (dev,0,urb->status);
 	}
 	else if(urb->actual_length>0){
 		dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
 						   urb->actual_length);
 	}

 	if(dev->dvb->streams > 0) {
 		ret = usb_submit_urb(urb, GFP_ATOMIC);
 		if(ret < 0) {
 			printk(KERN_ERR "tm6000:  error %s\n", __FUNCTION__);
 			kfree(urb->transfer_buffer);
 			usb_free_urb(urb);
 		}
 	}
 }

 int tm6000_start_stream(struct tm6000_core *dev)
 {
 	int ret;
 	unsigned int pipe, size;
 	struct tm6000_dvb *dvb = dev->dvb;

 	printk(KERN_INFO "tm6000: got start stream request %s\n",__FUNCTION__);

 	if (dev->mode != TM6000_MODE_DIGITAL) {
 		tm6000_init_digital_mode(dev);
 		dev->mode = TM6000_MODE_DIGITAL;
 	}

 	dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 	if(dvb->bulk_urb == NULL) {
 		printk(KERN_ERR "tm6000: couldn't allocate urb\n");
 		return -ENOMEM;
 	}

 	pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 							  & USB_ENDPOINT_NUMBER_MASK);

 	size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 	size = size * 15; /* 512 x 8 or 12 or 15 */

 	dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 	if(dvb->bulk_urb->transfer_buffer == NULL) {
 		usb_free_urb(dvb->bulk_urb);
 		printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 		return -ENOMEM;
 	}

 	usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 						 dvb->bulk_urb->transfer_buffer,
 						 size,
 						 tm6000_urb_received, dev);

 	ret = usb_clear_halt(dev->udev, pipe);
 	if(ret < 0) {
 		printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",ret,__FUNCTION__);
 		return ret;
 	}
 	else {
 		printk(KERN_ERR "tm6000: pipe resetted\n");
 	}

 /*	mutex_lock(&tm6000_driver.open_close_mutex); */
 	ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);

 /*	mutex_unlock(&tm6000_driver.open_close_mutex); */
 	if (ret) {
 		printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",ret);

 		kfree(dvb->bulk_urb->transfer_buffer);
 		usb_free_urb(dvb->bulk_urb);
 		return ret;
 	}

 	return 0;
 }

 void tm6000_stop_stream(struct tm6000_core *dev)
 {
 	struct tm6000_dvb *dvb = dev->dvb;

 	if(dvb->bulk_urb) {
 		printk (KERN_INFO "urb killing\n");
 		usb_kill_urb(dvb->bulk_urb);
 		printk (KERN_INFO "urb buffer free\n");
 		kfree(dvb->bulk_urb->transfer_buffer);
 		usb_free_urb(dvb->bulk_urb);
 		dvb->bulk_urb = NULL;
 	}
 }

 int tm6000_start_feed(struct dvb_demux_feed *feed)
 {
 	struct dvb_demux *demux = feed->demux;
 	struct tm6000_core *dev = demux->priv;
 	struct tm6000_dvb *dvb = dev->dvb;
 	printk(KERN_INFO "tm6000: got start feed request %s\n",__FUNCTION__);

 	mutex_lock(&dvb->mutex);
 	if(dvb->streams == 0) {
 		dvb->streams = 1;
 /*		mutex_init(&tm6000_dev->streming_mutex); */
 		tm6000_start_stream(dev);
 	}
 	else {
 		++(dvb->streams);
 	}
 	mutex_unlock(&dvb->mutex);

 	return 0;
 }

 int tm6000_stop_feed(struct dvb_demux_feed *feed) {
 	struct dvb_demux *demux = feed->demux;
 	struct tm6000_core *dev = demux->priv;
 	struct tm6000_dvb *dvb = dev->dvb;

 	printk(KERN_INFO "tm6000: got stop feed request %s\n",__FUNCTION__);

 	mutex_lock(&dvb->mutex);

 	printk (KERN_INFO "stream %#x\n", dvb->streams);
 	--(dvb->streams);
 	if(dvb->streams == 0) {
 		printk (KERN_INFO "stop stream\n");
 		tm6000_stop_stream(dev);
 /*		mutex_destroy(&tm6000_dev->streaming_mutex); */
 	}
 	mutex_unlock(&dvb->mutex);
 /*	mutex_destroy(&tm6000_dev->streaming_mutex); */

 	return 0;
 }

 int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 {
 	struct tm6000_dvb *dvb = dev->dvb;

 	if(dev->caps.has_zl10353) {
 		struct zl10353_config config =
 				    {.demod_address = dev->demod_addr,
 				     .no_tuner = 1,
 				     .parallel_ts = 1,
 				     .if2 = 45700,
 				     .disable_i2c_gate_ctrl = 1,
 				    };

 		dvb->frontend = dvb_attach(zl10353_attach, &config,
 							   &dev->i2c_adap);
 	}
 	else {
 		printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 		return -1;
 	}

 	return (!dvb->frontend) ? -1 : 0;
 }

 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 int tm6000_dvb_register(struct tm6000_core *dev)
 {
 	int ret = -1;
 	struct tm6000_dvb *dvb = dev->dvb;

 	mutex_init(&dvb->mutex);

 	dvb->streams = 0;

 	/* attach the frontend */
 	ret = tm6000_dvb_attach_frontend(dev);
 	if(ret < 0) {
 		printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 		goto err;
 	}

 	ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 							  THIS_MODULE, &dev->udev->dev, adapter_nr);
 	dvb->adapter.priv = dev;

 	if (dvb->frontend) {
 		switch (dev->tuner_type) {
 		case TUNER_XC2028: {
 			struct xc2028_config cfg = {
 				.i2c_adap = &dev->i2c_adap,
 				.i2c_addr = dev->tuner_addr,
 			};

 			dvb->frontend->callback = tm6000_tuner_callback;
 			ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 			if (ret < 0) {
 				printk(KERN_ERR
 					"tm6000: couldn't register frontend\n");
 				goto adapter_err;
 			}

 			if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 				printk(KERN_ERR "tm6000: couldn't register "
 						"frontend (xc3028)\n");
 				ret = -EINVAL;
 				goto frontend_err;
 			}
 			printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 					 "attached to frontend!\n");
 			break;
 			}
 		case TUNER_XC5000: {
 			struct xc5000_config cfg = {
 				.i2c_address = dev->tuner_addr,
 			};

 			dvb->frontend->callback = tm6000_xc5000_callback;
 			ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 			if (ret < 0) {
 				printk(KERN_ERR
 					"tm6000: couldn't register frontend\n");
 				goto adapter_err;
 			}

 			if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 				printk(KERN_ERR "tm6000: couldn't register "
 						"frontend (xc5000)\n");
 				ret = -EINVAL;
 				goto frontend_err;
 			}
 			printk(KERN_INFO "tm6000: XC5000 asked to be "
 					 "attached to frontend!\n");
 			break;
 			}
 		}
 	} else {
 		printk(KERN_ERR "tm6000: no frontend found\n");
 	}

 	dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 							    | DMX_MEMORY_BASED_FILTERING;
 	dvb->demux.priv = dev;
 	dvb->demux.filternum = 8;
 	dvb->demux.feednum = 8;
 	dvb->demux.start_feed = tm6000_start_feed;
 	dvb->demux.stop_feed = tm6000_stop_feed;
 	dvb->demux.write_to_decoder = NULL;
 	ret = dvb_dmx_init(&dvb->demux);
 	if(ret < 0) {
 		printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 		goto frontend_err;
 	}

 	dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 	dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 	dvb->dmxdev.capabilities = 0;

 	ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 	if(ret < 0) {
 		printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 		goto dvb_dmx_err;
 	}

 	return 0;

 dvb_dmx_err:
 	dvb_dmx_release(&dvb->demux);
 frontend_err:
 	if(dvb->frontend) {
 		dvb_frontend_detach(dvb->frontend);
 		dvb_unregister_frontend(dvb->frontend);
 	}
 adapter_err:
 	dvb_unregister_adapter(&dvb->adapter);
 err:
 	return ret;
 }

 void tm6000_dvb_unregister(struct tm6000_core *dev)
 {
 	struct tm6000_dvb *dvb = dev->dvb;

 	if(dvb->bulk_urb != NULL) {
 		struct urb *bulk_urb = dvb->bulk_urb;

 		kfree(bulk_urb->transfer_buffer);
 		bulk_urb->transfer_buffer = NULL;
 		usb_unlink_urb(bulk_urb);
 		usb_free_urb(bulk_urb);
 	}

 /*	mutex_lock(&tm6000_driver.open_close_mutex); */
 	if(dvb->frontend) {
 		dvb_frontend_detach(dvb->frontend);
 		dvb_unregister_frontend(dvb->frontend);
 	}

 	dvb_dmxdev_release(&dvb->dmxdev);
 	dvb_dmx_release(&dvb->demux);
 	dvb_unregister_adapter(&dvb->adapter);
 	mutex_destroy(&dvb->mutex);
 /*	mutex_unlock(&tm6000_driver.open_close_mutex); */

 }
	/*
	tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices

	Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>

	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

	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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/usb.h>

	#include "tm6000.h"
	#include "tm6000-regs.h"

	#include "zl10353.h"

	#include <media/tuner.h>

	#include "tuner-xc2028.h"
	#include "xc5000.h"

	static void inline print_err_status (struct tm6000_core *dev,
	int packet, int status)
	{
	char *errmsg = "Unknown";

	switch(status) {
	case -ENOENT:
	errmsg = "unlinked synchronuously";
	break;
	case -ECONNRESET:
	errmsg = "unlinked asynchronuously";
	break;
	case -ENOSR:
	errmsg = "Buffer error (overrun)";
	break;
	case -EPIPE:
	errmsg = "Stalled (device not responding)";
	break;
	case -EOVERFLOW:
	errmsg = "Babble (bad cable?)";
	break;
	case -EPROTO:
	errmsg = "Bit-stuff error (bad cable?)";
	break;
	case -EILSEQ:
	errmsg = "CRC/Timeout (could be anything)";
	break;
	case -ETIME:
	errmsg = "Device does not respond";
	break;
	}
	if (packet<0) {
	dprintk(dev, 1, "URB status %d [%s].\n",
	status, errmsg);
	} else {
	dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
	packet, status, errmsg);
	}
	}

	static void tm6000_urb_received(struct urb *urb)
	{
	int ret;
	struct tm6000_core* dev = urb->context;

	if(urb->status != 0) {
	print_err_status (dev,0,urb->status);
	}
	else if(urb->actual_length>0){
	dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
	urb->actual_length);
	}

	if(dev->dvb->streams > 0) {
	ret = usb_submit_urb(urb, GFP_ATOMIC);
	if(ret < 0) {
	printk(KERN_ERR "tm6000: error %s\n", __FUNCTION__);
	kfree(urb->transfer_buffer);
	usb_free_urb(urb);
	}
	}
	}

	int tm6000_start_stream(struct tm6000_core *dev)
	{
	int ret;
	unsigned int pipe, size;
	struct tm6000_dvb *dvb = dev->dvb;

	printk(KERN_INFO "tm6000: got start stream request %s\n",__FUNCTION__);

	if (dev->mode != TM6000_MODE_DIGITAL) {
	tm6000_init_digital_mode(dev);
	dev->mode = TM6000_MODE_DIGITAL;
	}

	dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
	if(dvb->bulk_urb == NULL) {
	printk(KERN_ERR "tm6000: couldn't allocate urb\n");
	return -ENOMEM;
	}

	pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
	& USB_ENDPOINT_NUMBER_MASK);

	size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
	size = size * 15; /* 512 x 8 or 12 or 15 */

	dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
	if(dvb->bulk_urb->transfer_buffer == NULL) {
	usb_free_urb(dvb->bulk_urb);
	printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
	return -ENOMEM;
	}

	usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
	dvb->bulk_urb->transfer_buffer,
	size,
	tm6000_urb_received, dev);

	ret = usb_clear_halt(dev->udev, pipe);
	if(ret < 0) {
	printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",ret,__FUNCTION__);
	return ret;
	}
	else {
	printk(KERN_ERR "tm6000: pipe resetted\n");
	}

	/* mutex_lock(&tm6000_driver.open_close_mutex); */
	ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);

	/* mutex_unlock(&tm6000_driver.open_close_mutex); */
	if (ret) {
	printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",ret);

	kfree(dvb->bulk_urb->transfer_buffer);
	usb_free_urb(dvb->bulk_urb);
	return ret;
	}

	return 0;
	}

	void tm6000_stop_stream(struct tm6000_core *dev)
	{
	struct tm6000_dvb *dvb = dev->dvb;

	if(dvb->bulk_urb) {
	printk (KERN_INFO "urb killing\n");
	usb_kill_urb(dvb->bulk_urb);
	printk (KERN_INFO "urb buffer free\n");
	kfree(dvb->bulk_urb->transfer_buffer);
	usb_free_urb(dvb->bulk_urb);
	dvb->bulk_urb = NULL;
	}
	}

	int tm6000_start_feed(struct dvb_demux_feed *feed)
	{
	struct dvb_demux *demux = feed->demux;
	struct tm6000_core *dev = demux->priv;
	struct tm6000_dvb *dvb = dev->dvb;
	printk(KERN_INFO "tm6000: got start feed request %s\n",__FUNCTION__);

	mutex_lock(&dvb->mutex);
	if(dvb->streams == 0) {
	dvb->streams = 1;
	/* mutex_init(&tm6000_dev->streming_mutex); */
	tm6000_start_stream(dev);
	}
	else {
	++(dvb->streams);
	}
	mutex_unlock(&dvb->mutex);

	return 0;
	}

	int tm6000_stop_feed(struct dvb_demux_feed *feed) {
	struct dvb_demux *demux = feed->demux;
	struct tm6000_core *dev = demux->priv;
	struct tm6000_dvb *dvb = dev->dvb;

	printk(KERN_INFO "tm6000: got stop feed request %s\n",__FUNCTION__);

	mutex_lock(&dvb->mutex);

	printk (KERN_INFO "stream %#x\n", dvb->streams);
	--(dvb->streams);
	if(dvb->streams == 0) {
	printk (KERN_INFO "stop stream\n");
	tm6000_stop_stream(dev);
	/* mutex_destroy(&tm6000_dev->streaming_mutex); */
	}
	mutex_unlock(&dvb->mutex);
	/* mutex_destroy(&tm6000_dev->streaming_mutex); */

	return 0;
	}

	int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
	{
	struct tm6000_dvb *dvb = dev->dvb;

	if(dev->caps.has_zl10353) {
	struct zl10353_config config =
	{.demod_address = dev->demod_addr,
	.no_tuner = 1,
	.parallel_ts = 1,
	.if2 = 45700,
	.disable_i2c_gate_ctrl = 1,
	};

	dvb->frontend = dvb_attach(zl10353_attach, &config,
	&dev->i2c_adap);
	}
	else {
	printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
	return -1;
	}

	return (!dvb->frontend) ? -1 : 0;
	}

	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	int tm6000_dvb_register(struct tm6000_core *dev)
	{
	int ret = -1;
	struct tm6000_dvb *dvb = dev->dvb;

	mutex_init(&dvb->mutex);

	dvb->streams = 0;

	/* attach the frontend */
	ret = tm6000_dvb_attach_frontend(dev);
	if(ret < 0) {
	printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
	goto err;
	}

	ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
	THIS_MODULE, &dev->udev->dev, adapter_nr);
	dvb->adapter.priv = dev;

	if (dvb->frontend) {
	switch (dev->tuner_type) {
	case TUNER_XC2028: {
	struct xc2028_config cfg = {
	.i2c_adap = &dev->i2c_adap,
	.i2c_addr = dev->tuner_addr,
	};

	dvb->frontend->callback = tm6000_tuner_callback;
	ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
	if (ret < 0) {
	printk(KERN_ERR
	"tm6000: couldn't register frontend\n");
	goto adapter_err;
	}

	if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
	printk(KERN_ERR "tm6000: couldn't register "
	"frontend (xc3028)\n");
	ret = -EINVAL;
	goto frontend_err;
	}
	printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
	"attached to frontend!\n");
	break;
	}
	case TUNER_XC5000: {
	struct xc5000_config cfg = {
	.i2c_address = dev->tuner_addr,
	};

	dvb->frontend->callback = tm6000_xc5000_callback;
	ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
	if (ret < 0) {
	printk(KERN_ERR
	"tm6000: couldn't register frontend\n");
	goto adapter_err;
	}

	if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
	printk(KERN_ERR "tm6000: couldn't register "
	"frontend (xc5000)\n");
	ret = -EINVAL;
	goto frontend_err;
	}
	printk(KERN_INFO "tm6000: XC5000 asked to be "
	"attached to frontend!\n");
	break;
	}
	}
	} else {
	printk(KERN_ERR "tm6000: no frontend found\n");
	}

	dvb->demux.dmx.capabilities = DMX_TS_FILTERING \| DMX_SECTION_FILTERING
	\| DMX_MEMORY_BASED_FILTERING;
	dvb->demux.priv = dev;
	dvb->demux.filternum = 8;
	dvb->demux.feednum = 8;
	dvb->demux.start_feed = tm6000_start_feed;
	dvb->demux.stop_feed = tm6000_stop_feed;
	dvb->demux.write_to_decoder = NULL;
	ret = dvb_dmx_init(&dvb->demux);
	if(ret < 0) {
	printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
	goto frontend_err;
	}

	dvb->dmxdev.filternum = dev->dvb->demux.filternum;
	dvb->dmxdev.demux = &dev->dvb->demux.dmx;
	dvb->dmxdev.capabilities = 0;

	ret = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
	if(ret < 0) {
	printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
	goto dvb_dmx_err;
	}

	return 0;

	dvb_dmx_err:
	dvb_dmx_release(&dvb->demux);
	frontend_err:
	if(dvb->frontend) {
	dvb_frontend_detach(dvb->frontend);
	dvb_unregister_frontend(dvb->frontend);
	}
	adapter_err:
	dvb_unregister_adapter(&dvb->adapter);
	err:
	return ret;
	}

	void tm6000_dvb_unregister(struct tm6000_core *dev)
	{
	struct tm6000_dvb *dvb = dev->dvb;

	if(dvb->bulk_urb != NULL) {
	struct urb *bulk_urb = dvb->bulk_urb;

	kfree(bulk_urb->transfer_buffer);
	bulk_urb->transfer_buffer = NULL;
	usb_unlink_urb(bulk_urb);
	usb_free_urb(bulk_urb);
	}

	/* mutex_lock(&tm6000_driver.open_close_mutex); */
	if(dvb->frontend) {
	dvb_frontend_detach(dvb->frontend);
	dvb_unregister_frontend(dvb->frontend);
	}

	dvb_dmxdev_release(&dvb->dmxdev);
	dvb_dmx_release(&dvb->demux);
	dvb_unregister_adapter(&dvb->adapter);
	mutex_destroy(&dvb->mutex);
	/* mutex_unlock(&tm6000_driver.open_close_mutex); */

	}