drivers/media/video/au0828/au0828-dvb.c - kernel/msm-4.9 - Gitiles

 /*
  *  Driver for the Auvitek USB bridge
  *
  *  Copyright (c) 2008 Steven Toth <stoth@hauppauge.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; 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/suspend.h>
 #include <media/v4l2-common.h>

 #include "au0828.h"

 #include "au8522.h"
 #include "xc5000.h"

 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 unsigned int dvb_debug = 1;

 #define _dbg(level, fmt, arg...)\
 	do { if (dvb_debug >= level)\
 		printk(KERN_DEBUG "%s/0: " fmt, DRIVER_NAME, ## arg);\
 	} while (0)

 static struct au8522_config hauppauge_hvr950q_config = {
 	.demod_address = 0x8e >> 1,
 	.status_mode   = AU8522_DEMODLOCKING,
 };

 static struct xc5000_config hauppauge_hvr950q_tunerconfig = {
 	.i2c_address      = 0x61,
 	.if_khz           = 6000,
 	.tuner_callback   = au0828_tuner_callback
 };

 /*-------------------------------------------------------------------*/
 static void urb_completion(struct urb *purb)
 {
 	u8 *ptr;
 	struct au0828_dev *dev = purb->context;
 	int ptype = usb_pipetype(purb->pipe);

 	if (!dev)
 		return;

 	if (dev->urb_streaming == 0)
 		return;

 	if (ptype != PIPE_BULK) {
 		printk(KERN_ERR "%s() Unsupported URB type %d\n", __FUNCTION__, ptype);
 		return;
 	}

 	ptr = (u8 *)purb->transfer_buffer;

 	/* Feed the transport payload into the kernel demux */
 	dvb_dmx_swfilter_packets(&dev->dvb.demux, purb->transfer_buffer, purb->actual_length / 188);

 	/* Clean the buffer before we requeue */
 	memset(purb->transfer_buffer, 0, URB_BUFSIZE);

 	/* Requeue URB */
 	usb_submit_urb(purb, GFP_ATOMIC);
 }

 static int stop_urb_transfer(struct au0828_dev *dev)
 {
 	int i;

 	printk(KERN_INFO "%s()\n", __FUNCTION__);

 	/* FIXME:  Do we need to free the transfer_buffers? */
 	for (i = 0; i < URB_COUNT; i++) {
 		usb_kill_urb(dev->urbs[i]);
 		kfree(dev->urbs[i]->transfer_buffer);
 		usb_free_urb(dev->urbs[i]);
 	}

 	dev->urb_streaming = 0;

 	return 0;
 }

 #define _AU0828_BULKPIPE 0x83
 #define _BULKPIPESIZE 0xe522

 static int start_urb_transfer(struct au0828_dev *dev)
 {
 	struct urb *purb;
 	int i, ret = -ENOMEM;
 	unsigned int pipe = usb_rcvbulkpipe(dev->usbdev, _AU0828_BULKPIPE);
 	int pipesize = usb_maxpacket(dev->usbdev, pipe, usb_pipeout(pipe));
 	int packets = _BULKPIPESIZE / pipesize;
 	int transfer_buflen = packets * pipesize;

 	printk(KERN_INFO "%s() transfer_buflen = %d\n", __FUNCTION__, transfer_buflen);

 	if (dev->urb_streaming) {
 		printk("%s: iso xfer already running!\n", __FUNCTION__);
 		return 0;
 	}

 	for (i = 0; i < URB_COUNT; i++) {

 		dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
 		if (!dev->urbs[i]) {
 			goto err;
 		}

 		purb = dev->urbs[i];

 		purb->transfer_buffer = kzalloc(URB_BUFSIZE, GFP_KERNEL);
 		if (!purb->transfer_buffer) {
 			usb_free_urb(purb);
 			dev->urbs[i] = 0;
 			goto err;
 		}

 		purb->status = -EINPROGRESS;
 		usb_fill_bulk_urb(purb,
 				  dev->usbdev,
 				  usb_rcvbulkpipe(dev->usbdev, _AU0828_BULKPIPE),
 				  purb->transfer_buffer,
 				  URB_BUFSIZE,
 				  urb_completion,
 				  dev);

 	}

 	for (i = 0; i < URB_COUNT; i++) {
 		ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
 		if (ret != 0) {
 			stop_urb_transfer(dev);
 			printk("%s: failed urb submission, err = %d\n", __FUNCTION__, ret);
 			return ret;
 		}
 	}

 	dev->urb_streaming = 1;
 	ret = 0;

 err:
 	return ret;
 }

 static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
 {
 	struct dvb_demux *demux = feed->demux;
 	struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 	struct au0828_dvb *dvb = &dev->dvb;
 	int ret = 0;

 	printk(KERN_INFO "%s() pid = 0x%x index = %d\n", __FUNCTION__, feed->pid, feed->index);

 	if (!demux->dmx.frontend)
 		return -EINVAL;

 	printk(KERN_INFO "%s() Preparing, feeding = %d\n", __FUNCTION__, dvb->feeding);
 	if (dvb) {
 		mutex_lock(&dvb->lock);
 		if (dvb->feeding++ == 0) {
 			printk(KERN_INFO "%s() Starting Transport DMA\n",
 				__FUNCTION__);
 			au0828_write(dev, 0x608, 0x90);
 			au0828_write(dev, 0x609, 0x72);
 			au0828_write(dev, 0x60a, 0x71);
 			au0828_write(dev, 0x60b, 0x01);
 			ret = start_urb_transfer(dev);
 		}
 		mutex_unlock(&dvb->lock);
 	}

 	return ret;
 }

 static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
 {
 	struct dvb_demux *demux = feed->demux;
 	struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 	struct au0828_dvb *dvb = &dev->dvb;
 	int ret = 0;

 	printk(KERN_INFO "%s() pid = 0x%x index = %d\n", __FUNCTION__, feed->pid, feed->index);

 	if (dvb) {
 		mutex_lock(&dvb->lock);
 		if (--dvb->feeding == 0) {
 			printk(KERN_INFO "%s() Stopping Transport DMA\n",
 				__FUNCTION__);
 			au0828_write(dev, 0x608, 0x00);
 			au0828_write(dev, 0x609, 0x00);
 			au0828_write(dev, 0x60a, 0x00);
 			au0828_write(dev, 0x60b, 0x00);
 			ret = stop_urb_transfer(dev);
 		}
 		mutex_unlock(&dvb->lock);
 	}

 	return ret;
 }

 int dvb_register(struct au0828_dev *dev)
 {
 	struct au0828_dvb *dvb = &dev->dvb;
 	int result;

 	/* register adapter */
 	result = dvb_register_adapter(&dvb->adapter, DRIVER_NAME, THIS_MODULE,
 				      &dev->usbdev->dev, adapter_nr);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_adapter;
 	}
 	dvb->adapter.priv = dev;

 	/* register frontend */
 	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_frontend;
 	}

 	/* register demux stuff */
 	dvb->demux.dmx.capabilities =
 		DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 		DMX_MEMORY_BASED_FILTERING;
 	dvb->demux.priv       = dev;
 	dvb->demux.filternum  = 256;
 	dvb->demux.feednum    = 256;
 	dvb->demux.start_feed = au0828_dvb_start_feed;
 	dvb->demux.stop_feed  = au0828_dvb_stop_feed;
 	result = dvb_dmx_init(&dvb->demux);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_dmx;
 	}

 	dvb->dmxdev.filternum    = 256;
 	dvb->dmxdev.demux        = &dvb->demux.dmx;
 	dvb->dmxdev.capabilities = 0;
 	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_dmxdev;
 	}

 	dvb->fe_hw.source = DMX_FRONTEND_0;
 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_fe_hw;
 	}

 	dvb->fe_mem.source = DMX_MEMORY_FE;
 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_fe_mem;
 	}

 	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 		       DRIVER_NAME, result);
 		goto fail_fe_conn;
 	}

 	/* register network adapter */
 	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 	return 0;

 fail_fe_conn:
 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 fail_fe_mem:
 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 fail_fe_hw:
 	dvb_dmxdev_release(&dvb->dmxdev);
 fail_dmxdev:
 	dvb_dmx_release(&dvb->demux);
 fail_dmx:
 	dvb_unregister_frontend(dvb->frontend);
 fail_frontend:
 	dvb_frontend_detach(dvb->frontend);
 	dvb_unregister_adapter(&dvb->adapter);
 fail_adapter:
 	return result;
 }

 void au0828_dvb_unregister(struct au0828_dev *dev)
 {
 	struct au0828_dvb *dvb = &dev->dvb;

 	if(dvb->frontend == NULL)
 		return;

 	dvb_net_release(&dvb->net);
 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 	dvb_dmxdev_release(&dvb->dmxdev);
 	dvb_dmx_release(&dvb->demux);
 	dvb_unregister_frontend(dvb->frontend);
 	dvb_frontend_detach(dvb->frontend);
 	dvb_unregister_adapter(&dvb->adapter);
 }

 /* All the DVB attach calls go here, this function get's modified
  * for each new card. No other function in this file needs
  * to change.
  */
 int au0828_dvb_register(struct au0828_dev *dev)
 {
 	struct au0828_dvb *dvb = &dev->dvb;
 	int ret;

 	/* init frontend */
 	switch (dev->board) {
 	case AU0828_BOARD_HAUPPAUGE_HVR850:
 	case AU0828_BOARD_HAUPPAUGE_HVR950Q:
 	case AU0828_BOARD_DVICO_FUSIONHDTV7:
 		dvb->frontend = dvb_attach(au8522_attach,
 				&hauppauge_hvr950q_config,
 				&dev->i2c_adap);
 		if (dvb->frontend != NULL) {
 			hauppauge_hvr950q_tunerconfig.priv = dev;
 			dvb_attach(xc5000_attach, dvb->frontend,
 				&dev->i2c_adap,
 				&hauppauge_hvr950q_tunerconfig);
 		}
 		break;
 	default:
 		printk("The frontend of your DVB/ATSC card isn't supported yet\n");
 		break;
 	}
 	if (NULL == dvb->frontend) {
 		printk("Frontend initialization failed\n");
 		return -1;
 	}

 	/* Put the analog decoder in standby to keep it quiet */
 	au0828_call_i2c_clients(dev, TUNER_SET_STANDBY, NULL);

 	if (dvb->frontend->ops.analog_ops.standby)
 		dvb->frontend->ops.analog_ops.standby(dvb->frontend);

 	/* register everything */
 	ret = dvb_register(dev);
 	if (ret < 0) {
 		if (dvb->frontend->ops.release)
 			dvb->frontend->ops.release(dvb->frontend);
 		return ret;
 	}

 	return 0;
 }
	/*
	* Driver for the Auvitek USB bridge
	*
	* Copyright (c) 2008 Steven Toth <stoth@hauppauge.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; 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/device.h>
	#include <linux/suspend.h>
	#include <media/v4l2-common.h>

	#include "au0828.h"

	#include "au8522.h"
	#include "xc5000.h"

	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	unsigned int dvb_debug = 1;

	#define _dbg(level, fmt, arg...)\
	do { if (dvb_debug >= level)\
	printk(KERN_DEBUG "%s/0: " fmt, DRIVER_NAME, ## arg);\
	} while (0)

	static struct au8522_config hauppauge_hvr950q_config = {
	.demod_address = 0x8e >> 1,
	.status_mode = AU8522_DEMODLOCKING,
	};

	static struct xc5000_config hauppauge_hvr950q_tunerconfig = {
	.i2c_address = 0x61,
	.if_khz = 6000,
	.tuner_callback = au0828_tuner_callback
	};

	/-------------------------------------------------------------------/
	static void urb_completion(struct urb *purb)
	{
	u8 *ptr;
	struct au0828_dev *dev = purb->context;
	int ptype = usb_pipetype(purb->pipe);

	if (!dev)
	return;

	if (dev->urb_streaming == 0)
	return;

	if (ptype != PIPE_BULK) {
	printk(KERN_ERR "%s() Unsupported URB type %d\n", __FUNCTION__, ptype);
	return;
	}

	ptr = (u8 *)purb->transfer_buffer;

	/* Feed the transport payload into the kernel demux */
	dvb_dmx_swfilter_packets(&dev->dvb.demux, purb->transfer_buffer, purb->actual_length / 188);

	/* Clean the buffer before we requeue */
	memset(purb->transfer_buffer, 0, URB_BUFSIZE);

	/* Requeue URB */
	usb_submit_urb(purb, GFP_ATOMIC);
	}

	static int stop_urb_transfer(struct au0828_dev *dev)
	{
	int i;

	printk(KERN_INFO "%s()\n", __FUNCTION__);

	/* FIXME: Do we need to free the transfer_buffers? */
	for (i = 0; i < URB_COUNT; i++) {
	usb_kill_urb(dev->urbs[i]);
	kfree(dev->urbs[i]->transfer_buffer);
	usb_free_urb(dev->urbs[i]);
	}

	dev->urb_streaming = 0;

	return 0;
	}

	#define _AU0828_BULKPIPE 0x83
	#define _BULKPIPESIZE 0xe522

	static int start_urb_transfer(struct au0828_dev *dev)
	{
	struct urb *purb;
	int i, ret = -ENOMEM;
	unsigned int pipe = usb_rcvbulkpipe(dev->usbdev, _AU0828_BULKPIPE);
	int pipesize = usb_maxpacket(dev->usbdev, pipe, usb_pipeout(pipe));
	int packets = _BULKPIPESIZE / pipesize;
	int transfer_buflen = packets * pipesize;

	printk(KERN_INFO "%s() transfer_buflen = %d\n", __FUNCTION__, transfer_buflen);

	if (dev->urb_streaming) {
	printk("%s: iso xfer already running!\n", __FUNCTION__);
	return 0;
	}

	for (i = 0; i < URB_COUNT; i++) {

	dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
	if (!dev->urbs[i]) {
	goto err;
	}

	purb = dev->urbs[i];

	purb->transfer_buffer = kzalloc(URB_BUFSIZE, GFP_KERNEL);
	if (!purb->transfer_buffer) {
	usb_free_urb(purb);
	dev->urbs[i] = 0;
	goto err;
	}

	purb->status = -EINPROGRESS;
	usb_fill_bulk_urb(purb,
	dev->usbdev,
	usb_rcvbulkpipe(dev->usbdev, _AU0828_BULKPIPE),
	purb->transfer_buffer,
	URB_BUFSIZE,
	urb_completion,
	dev);

	}

	for (i = 0; i < URB_COUNT; i++) {
	ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
	if (ret != 0) {
	stop_urb_transfer(dev);
	printk("%s: failed urb submission, err = %d\n", __FUNCTION__, ret);
	return ret;
	}
	}

	dev->urb_streaming = 1;
	ret = 0;

	err:
	return ret;
	}

	static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
	{
	struct dvb_demux *demux = feed->demux;
	struct au0828_dev dev = (struct au0828_dev ) demux->priv;
	struct au0828_dvb *dvb = &dev->dvb;
	int ret = 0;

	printk(KERN_INFO "%s() pid = 0x%x index = %d\n", __FUNCTION__, feed->pid, feed->index);

	if (!demux->dmx.frontend)
	return -EINVAL;

	printk(KERN_INFO "%s() Preparing, feeding = %d\n", __FUNCTION__, dvb->feeding);
	if (dvb) {
	mutex_lock(&dvb->lock);
	if (dvb->feeding++ == 0) {
	printk(KERN_INFO "%s() Starting Transport DMA\n",
	__FUNCTION__);
	au0828_write(dev, 0x608, 0x90);
	au0828_write(dev, 0x609, 0x72);
	au0828_write(dev, 0x60a, 0x71);
	au0828_write(dev, 0x60b, 0x01);
	ret = start_urb_transfer(dev);
	}
	mutex_unlock(&dvb->lock);
	}

	return ret;
	}

	static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
	{
	struct dvb_demux *demux = feed->demux;
	struct au0828_dev dev = (struct au0828_dev ) demux->priv;
	struct au0828_dvb *dvb = &dev->dvb;
	int ret = 0;

	printk(KERN_INFO "%s() pid = 0x%x index = %d\n", __FUNCTION__, feed->pid, feed->index);

	if (dvb) {
	mutex_lock(&dvb->lock);
	if (--dvb->feeding == 0) {
	printk(KERN_INFO "%s() Stopping Transport DMA\n",
	__FUNCTION__);
	au0828_write(dev, 0x608, 0x00);
	au0828_write(dev, 0x609, 0x00);
	au0828_write(dev, 0x60a, 0x00);
	au0828_write(dev, 0x60b, 0x00);
	ret = stop_urb_transfer(dev);
	}
	mutex_unlock(&dvb->lock);
	}

	return ret;
	}

	int dvb_register(struct au0828_dev *dev)
	{
	struct au0828_dvb *dvb = &dev->dvb;
	int result;

	/* register adapter */
	result = dvb_register_adapter(&dvb->adapter, DRIVER_NAME, THIS_MODULE,
	&dev->usbdev->dev, adapter_nr);
	if (result < 0) {
	printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_adapter;
	}
	dvb->adapter.priv = dev;

	/* register frontend */
	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
	if (result < 0) {
	printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_frontend;
	}

	/* register demux stuff */
	dvb->demux.dmx.capabilities =
	DMX_TS_FILTERING \| DMX_SECTION_FILTERING \|
	DMX_MEMORY_BASED_FILTERING;
	dvb->demux.priv = dev;
	dvb->demux.filternum = 256;
	dvb->demux.feednum = 256;
	dvb->demux.start_feed = au0828_dvb_start_feed;
	dvb->demux.stop_feed = au0828_dvb_stop_feed;
	result = dvb_dmx_init(&dvb->demux);
	if (result < 0) {
	printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_dmx;
	}

	dvb->dmxdev.filternum = 256;
	dvb->dmxdev.demux = &dvb->demux.dmx;
	dvb->dmxdev.capabilities = 0;
	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
	if (result < 0) {
	printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_dmxdev;
	}

	dvb->fe_hw.source = DMX_FRONTEND_0;
	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	if (result < 0) {
	printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_fe_hw;
	}

	dvb->fe_mem.source = DMX_MEMORY_FE;
	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	if (result < 0) {
	printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_fe_mem;
	}

	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	if (result < 0) {
	printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
	DRIVER_NAME, result);
	goto fail_fe_conn;
	}

	/* register network adapter */
	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
	return 0;

	fail_fe_conn:
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	fail_fe_mem:
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	fail_fe_hw:
	dvb_dmxdev_release(&dvb->dmxdev);
	fail_dmxdev:
	dvb_dmx_release(&dvb->demux);
	fail_dmx:
	dvb_unregister_frontend(dvb->frontend);
	fail_frontend:
	dvb_frontend_detach(dvb->frontend);
	dvb_unregister_adapter(&dvb->adapter);
	fail_adapter:
	return result;
	}

	void au0828_dvb_unregister(struct au0828_dev *dev)
	{
	struct au0828_dvb *dvb = &dev->dvb;

	if(dvb->frontend == NULL)
	return;

	dvb_net_release(&dvb->net);
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	dvb_dmxdev_release(&dvb->dmxdev);
	dvb_dmx_release(&dvb->demux);
	dvb_unregister_frontend(dvb->frontend);
	dvb_frontend_detach(dvb->frontend);
	dvb_unregister_adapter(&dvb->adapter);
	}

	/* All the DVB attach calls go here, this function get's modified
	* for each new card. No other function in this file needs
	* to change.
	*/
	int au0828_dvb_register(struct au0828_dev *dev)
	{
	struct au0828_dvb *dvb = &dev->dvb;
	int ret;

	/* init frontend */
	switch (dev->board) {
	case AU0828_BOARD_HAUPPAUGE_HVR850:
	case AU0828_BOARD_HAUPPAUGE_HVR950Q:
	case AU0828_BOARD_DVICO_FUSIONHDTV7:
	dvb->frontend = dvb_attach(au8522_attach,
	&hauppauge_hvr950q_config,
	&dev->i2c_adap);
	if (dvb->frontend != NULL) {
	hauppauge_hvr950q_tunerconfig.priv = dev;
	dvb_attach(xc5000_attach, dvb->frontend,
	&dev->i2c_adap,
	&hauppauge_hvr950q_tunerconfig);
	}
	break;
	default:
	printk("The frontend of your DVB/ATSC card isn't supported yet\n");
	break;
	}
	if (NULL == dvb->frontend) {
	printk("Frontend initialization failed\n");
	return -1;
	}

	/* Put the analog decoder in standby to keep it quiet */
	au0828_call_i2c_clients(dev, TUNER_SET_STANDBY, NULL);

	if (dvb->frontend->ops.analog_ops.standby)
	dvb->frontend->ops.analog_ops.standby(dvb->frontend);

	/* register everything */
	ret = dvb_register(dev);
	if (ret < 0) {
	if (dvb->frontend->ops.release)
	dvb->frontend->ops.release(dvb->frontend);
	return ret;
	}

	return 0;
	}