V4L/DVB (9222): S2API: Add Multiple-frontend on a single adapter support.

A detailed description from the original patches 2 years ago:

"The WinTV-HVR3000 has a single transport bus which is shared between
a DVB-T and DVB-S modulator. These patches build on the bus acquisition
cx88 work from a few weeks ago to add support for this.

So to applications the HVR3000 looks like this:
/dev/dvb/adapter0/fe0 (cx24123 DVB-S demod)
/dev/dvb/adapter0/fe1 (cx22702 DVB-T demod)

Additional boards continue as before, eg:
/dev/dvb/adapter1/fe0 (lgdt3302 ATSC demod)

The basic change is removing the single instance of the videobuf_dvb in
cx8802_dev and saa7134_dev(?) and replacing it with a list and some
supporting functions.

*NOTE* This branch was taken before v4l-dvb was closed for 2.6.19 so
two or three current cx88 patches appear to be reversed by this tree,
this will be cleaned up in the near future. The patches missing change
the mutex handing to core->lock, fix an enumeration problem."

It should be recognised that a number of people have been maintaining
this patchset. Significant levels of Kudos to everyone one involved,
including but not limited to:

Darron Broad
Fabio M. Di Nitto
Carlo Scarfoglio
Hans Werner

Without the work of these people, and countless others, my two year old
patches would of died on the Mercurial linuxtv.org vine a long time
ago.

TODO: Revise these patches a little further so that the need for
demux1 and dvr0 is optional, not mandatory on the HVR3000.

HISTORY (darron):
This is the last update to MFE prepared by Hans which is based
upon the `scratchpad' diff created by Carlo.
All MFE work prior to that point must be attributed to Fabio
who ported and maintained Steve's original patch up to that
time.
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-core/dvb_frontend.c

@@ -212,8 +212,9 @@ static int dvb_frontend_get_event(struct dvb_frontend *fe,
 
 static void dvb_frontend_init(struct dvb_frontend *fe)
 {
-	dprintk ("DVB: initialising frontend %i (%s)...\n",
+	dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 		 fe->dvb->num,
+		 fe->id,
 		 fe->ops.info.name);
 
 	if (fe->ops.init)
@@ -686,7 +687,7 @@ static int dvb_frontend_start(struct dvb_frontend *fe)
 	mb();
 
 	fe_thread = kthread_run(dvb_frontend_thread, fe,
-		"kdvb-fe-%i", fe->dvb->num);
+		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 	if (IS_ERR(fe_thread)) {
 		ret = PTR_ERR(fe_thread);
 		printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
@@ -710,8 +711,8 @@ static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 		*freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 
 	if (*freq_min == 0 || *freq_max == 0)
-		printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n",
-		       fe->dvb->num);
+		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
+		       fe->dvb->num,fe->id);
 }
 
 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
@@ -724,8 +725,8 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 	if ((freq_min && parms->frequency < freq_min) ||
 	    (freq_max && parms->frequency > freq_max)) {
-		printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n",
-		       fe->dvb->num, parms->frequency, freq_min, freq_max);
+		printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
+		       fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 		return -EINVAL;
 	}
 
@@ -735,8 +736,8 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 		     parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 		    (fe->ops.info.symbol_rate_max &&
 		     parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
-			printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
-			       fe->dvb->num, parms->u.qpsk.symbol_rate,
+			printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
+			       fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 			return -EINVAL;
 		}
@@ -746,8 +747,8 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 		     parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 		    (fe->ops.info.symbol_rate_max &&
 		     parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
-			printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
-			       fe->dvb->num, parms->u.qam.symbol_rate,
+			printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
+			       fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 			return -EINVAL;
 		}
@@ -1807,8 +1808,9 @@ int dvb_register_frontend(struct dvb_adapter* dvb,
 	fe->dvb = dvb;
 	fepriv->inversion = INVERSION_OFF;
 
-	printk ("DVB: registering frontend %i (%s)...\n",
+	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
 		fe->dvb->num,
+		fe->id,
 		fe->ops.info.name);
 
 	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,

drivers/media/dvb/dvb-core/dvb_frontend.h

@@ -222,6 +222,7 @@ struct dvb_frontend {
 	struct dtv_frontend_properties dtv_property_cache;
 #define DVB_FRONTEND_COMPONENT_TUNER 0
 	int (*callback)(void *adapter_priv, int component, int cmd, int arg);
+	int id;
 };
 
 extern int dvb_register_frontend(struct dvb_adapter *dvb,

drivers/media/video/cx23885/cx23885.h

@@ -225,7 +225,7 @@ struct cx23885_tsport {
 	int                        nr;
 	int                        sram_chno;
 
-	struct videobuf_dvb        dvb;
+	struct videobuf_dvb_frontends frontends;
 
 	/* dma queues */
 	struct cx23885_dmaqueue    mpegq;

drivers/media/video/cx88/cx88-cards.c

@@ -1291,6 +1291,7 @@ static const struct cx88_board cx88_boards[] = {
 			.gpio0  = 0x84bf,
 		}},
 		.mpeg           = CX88_MPEG_DVB,
+		.num_frontends	= 2,
 	},
 	[CX88_BOARD_NORWOOD_MICRO] = {
 		.name           = "Norwood Micro TV Tuner",
@@ -1761,6 +1762,7 @@ static const struct cx88_board cx88_boards[] = {
 		} },
 		/* fixme: Add radio support */
 		.mpeg           = CX88_MPEG_DVB,
+		.num_frontends	= 2,
 	},
 	[CX88_BOARD_HAUPPAUGE_HVR4000LITE] = {
 		.name           = "Hauppauge WinTV-HVR4000(Lite) DVB-S/S2",
@@ -3002,12 +3004,17 @@ struct cx88_core *cx88_core_create(struct pci_dev *pci, int nr)
 		cx88_card_list(core, pci);
 	}
 
+	memset(&core->board, 0, sizeof(core->board));
 	memcpy(&core->board, &cx88_boards[core->boardnr], sizeof(core->board));
 
-	info_printk(core, "subsystem: %04x:%04x, board: %s [card=%d,%s]\n",
+	if (!core->board.num_frontends)
+		core->board.num_frontends=1;
+
+	info_printk(core, "subsystem: %04x:%04x, board: %s [card=%d,%s], frontend(s): %d\n",
 		pci->subsystem_vendor, pci->subsystem_device, core->board.name,
 		core->boardnr, card[core->nr] == core->boardnr ?
-		"insmod option" : "autodetected");
+		"insmod option" : "autodetected",
+		core->board.num_frontends);
 
 	if (tuner[core->nr] != UNSET)
 		core->board.tuner_type = tuner[core->nr];

drivers/media/video/cx88/cx88-i2c.c

@@ -116,18 +116,23 @@ static int detach_inform(struct i2c_client *client)
 
 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
 {
+	struct videobuf_dvb_frontend *fe0 = NULL;
 	if (0 != core->i2c_rc)
 		return;
 
 #if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
-	if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
-		if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
-			core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
+	if (core->dvbdev) {
+		/* Get the first frontend and assume that all I2C is routed through it */
+		/* TODO: Get _THIS_FE_ then find the right i2c_gate_ctrl for it */
+		fe0 = videobuf_dvb_get_frontend(&core->dvbdev->frontends, 1);
+
+		if (fe0 && fe0->dvb.frontend && fe0->dvb.frontend->ops.i2c_gate_ctrl)
+			fe0->dvb.frontend->ops.i2c_gate_ctrl(fe0->dvb.frontend, 1);
 
 		i2c_clients_command(&core->i2c_adap, cmd, arg);
 
-		if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
-			core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
+		if (fe0 && fe0->dvb.frontend && fe0->dvb.frontend->ops.i2c_gate_ctrl)
+			fe0->dvb.frontend->ops.i2c_gate_ctrl(fe0->dvb.frontend, 0);
 	} else
 #endif
 		i2c_clients_command(&core->i2c_adap, cmd, arg);

drivers/media/video/cx88/cx88-input.c

@@ -495,6 +495,7 @@ void cx88_ir_irq(struct cx88_core *core)
 	case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 		ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 		ir_dprintk("biphase decoded: %x\n", ircode);
+//TODO Darron has other code here
 		if ((ircode & 0xfffff000) != 0x3000)
 			break;
 		ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);

drivers/media/video/cx88/cx88-mpeg.c

@@ -768,7 +768,8 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
 {
 	struct cx8802_dev *dev;
 	struct cx88_core  *core;
-	int err;
+	struct videobuf_dvb_frontend *demod;
+	int err,i;
 
 	/* general setup */
 	core = cx88_core_get(pci_dev);
@@ -781,6 +782,11 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
 	if (!core->board.mpeg)
 		goto fail_core;
 
+	if (!core->board.num_frontends) {
+		printk(KERN_ERR "%s() .num_frontends should be non-zero, err = %d\n", __FUNCTION__, err);
+		goto fail_core;
+	}
+
 	err = -ENOMEM;
 	dev = kzalloc(sizeof(*dev),GFP_KERNEL);
 	if (NULL == dev)
@@ -795,6 +801,20 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
 	INIT_LIST_HEAD(&dev->drvlist);
 	list_add_tail(&dev->devlist,&cx8802_devlist);
 
+	mutex_init(&dev->frontends.lock);
+	INIT_LIST_HEAD(&dev->frontends.frontend.felist);
+
+	printk(KERN_INFO "%s() allocating %d frontend(s)\n", __FUNCTION__, core->board.num_frontends);
+
+	for (i = 1; i <= core->board.num_frontends; i++) {
+		demod = videobuf_dvb_alloc_frontend(dev, &dev->frontends, i);
+		if(demod == NULL) {
+			printk(KERN_ERR "%s() failed to alloc\n", __FUNCTION__);
+			err = -ENOMEM;
+			goto fail_free;
+		}
+	}
+
 	/* Maintain a reference so cx88-video can query the 8802 device. */
 	core->dvbdev = dev;
 

drivers/media/video/cx88/cx88.h

@@ -261,6 +261,7 @@ struct cx88_board {
 	struct cx88_input       radio;
 	enum cx88_board_type    mpeg;
 	unsigned int            audio_chip;
+	int			num_frontends;
 };
 
 struct cx88_subid {
@@ -356,6 +357,7 @@ struct cx88_core {
 	struct cx8802_dev          *dvbdev;
 	enum cx88_board_type       active_type_id;
 	int			   active_ref;
+	int			   active_fe_id;
 };
 
 struct cx8800_dev;
@@ -490,7 +492,7 @@ struct cx8802_dev {
 
 #if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
 	/* for dvb only */
-	struct videobuf_dvb        dvb;
+	struct videobuf_dvb_frontends frontends;
 #endif
 
 #if defined(CONFIG_VIDEO_CX88_VP3054) || \

drivers/media/video/saa7134/saa7134.h

@@ -581,7 +581,7 @@ struct saa7134_dev {
 
 #if defined(CONFIG_VIDEO_SAA7134_DVB) || defined(CONFIG_VIDEO_SAA7134_DVB_MODULE)
 	/* SAA7134_MPEG_DVB only */
-	struct videobuf_dvb        dvb;
+	struct videobuf_dvb_frontends frontends;
 	int (*original_demod_sleep)(struct dvb_frontend *fe);
 	int (*original_set_voltage)(struct dvb_frontend *fe, fe_sec_voltage_t voltage);
 	int (*original_set_high_voltage)(struct dvb_frontend *fe, long arg);

drivers/media/video/videobuf-dvb.c

@@ -135,29 +135,75 @@ static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
 }
 
 /* ------------------------------------------------------------------ */
+/* Register a single adapter and one or more frontends */
+int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
+			  struct module *module,
+			  void *adapter_priv,
+			  struct device *device,
+			  short *adapter_nr) //NEW
+{
+	struct list_head *list, *q;
+	struct videobuf_dvb_frontend *fe;
+	int res = -EINVAL;
+
+	fe = videobuf_dvb_get_frontend(f, 1);
+	if (!fe) {
+		printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
+		goto err;
+	}
+
+	/* Bring up the adapter */
+	res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, fe->dvb.name, adapter_nr); //NEW
+	if (res < 0) {
+		printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
+		goto err;
+	}
 
-int videobuf_dvb_register(struct videobuf_dvb *dvb,
+	/* Attach all of the frontends to the adapter */
+	mutex_lock(&f->lock);
+	list_for_each_safe(list, q, &f->frontend.felist) {
+		fe = list_entry(list, struct videobuf_dvb_frontend, felist);
+
+		res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
+		if (res < 0) {
+			printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
+				fe->dvb.name, res);
+		}
+	}
+	mutex_unlock(&f->lock);
+
+err:
+	return res;
+}
+
+int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
 			  struct module *module,
 			  void *adapter_priv,
 			  struct device *device,
-			  short *adapter_nr)
+			  char *adapter_name,
+			  short *adapter_nr) //NEW
 {
 	int result;
 
-	mutex_init(&dvb->lock);
+	mutex_init(&fe->lock);
 
 	/* register adapter */
-	result = dvb_register_adapter(&dvb->adapter, dvb->name, module, device,
-				      adapter_nr);
+	result = dvb_register_adapter(&fe->adapter, adapter_name, module, device, adapter_nr);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
-		       dvb->name, result);
-		goto fail_adapter;
+		       adapter_name, result);
 	}
-	dvb->adapter.priv = adapter_priv;
+	fe->adapter.priv = adapter_priv;
+
+	return result;
+}
+
+int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, struct videobuf_dvb *dvb)
+{
+	int result;
 
 	/* register frontend */
-	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
+	result = dvb_register_frontend(adapter, dvb->frontend);
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 		       dvb->name, result);
@@ -183,7 +229,9 @@ int videobuf_dvb_register(struct videobuf_dvb *dvb,
 	dvb->dmxdev.filternum    = 256;
 	dvb->dmxdev.demux        = &dvb->demux.dmx;
 	dvb->dmxdev.capabilities = 0;
-	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
+	//result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
+	result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
+
 	if (result < 0) {
 		printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 		       dvb->name, result);
@@ -214,7 +262,7 @@ int videobuf_dvb_register(struct videobuf_dvb *dvb,
 	}
 
 	/* register network adapter */
-	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
+	dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
 	return 0;
 
 fail_fe_conn:
@@ -230,24 +278,101 @@ fail_dmx:
 fail_frontend:
 	dvb_frontend_detach(dvb->frontend);
 	dvb_unregister_adapter(&dvb->adapter);
-fail_adapter:
+
 	return result;
 }
 
-void videobuf_dvb_unregister(struct videobuf_dvb *dvb)
+void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
 {
-	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);
+	struct list_head *list, *q;
+	struct videobuf_dvb_frontend *fe;
+
+	mutex_lock(&f->lock);
+	list_for_each_safe(list, q, &f->frontend.felist) {
+		fe = list_entry(list, struct videobuf_dvb_frontend, felist);
+
+		dvb_net_release(&fe->dvb.net);
+		fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_mem);
+		fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_hw);
+		dvb_dmxdev_release(&fe->dvb.dmxdev);
+		dvb_dmx_release(&fe->dvb.demux);
+		dvb_unregister_frontend(fe->dvb.frontend);
+		dvb_frontend_detach(fe->dvb.frontend);
+
+		list_del(list);
+		kfree(fe);
+	}
+	mutex_unlock(&f->lock);
+
+	dvb_unregister_adapter(&f->adapter);
+}
+
+struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id)
+{
+	struct list_head *list, *q;
+	struct videobuf_dvb_frontend *fe, *ret = NULL;
+
+	mutex_lock(&f->lock);
+
+	list_for_each_safe(list, q, &f->frontend.felist) {
+		fe = list_entry(list, struct videobuf_dvb_frontend, felist);
+		if (fe->id == id) {
+			ret = fe;
+			break;
+		}
+	}
+
+	mutex_unlock(&f->lock);
+
+	return ret;
+}
+
+int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, struct dvb_frontend *p)
+{
+	struct list_head *list, *q;
+	struct videobuf_dvb_frontend *fe = NULL;
+	int ret = 0;
+
+	mutex_lock(&f->lock);
+
+	list_for_each_safe(list, q, &f->frontend.felist) {
+		fe = list_entry(list, struct videobuf_dvb_frontend, felist);
+		if (fe->dvb.frontend == p) {
+			ret = fe->id;
+			break;
+		}
+	}
+
+	mutex_unlock(&f->lock);
+
+	return ret;
+}
+
+struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(void *private, struct videobuf_dvb_frontends *f, int id)
+{
+	struct videobuf_dvb_frontend *fe;
+
+	fe = kzalloc(sizeof(struct videobuf_dvb_frontend),GFP_KERNEL);
+	if (fe == NULL)
+		goto fail_alloc;
+
+	fe->dev = private;
+	fe->id = id;
+	mutex_init(&fe->dvb.lock);
+
+	mutex_lock(&f->lock);
+	list_add_tail(&fe->felist,&f->frontend.felist);
+	mutex_unlock(&f->lock);
+
+fail_alloc:
+	return fe;
 }
 
-EXPORT_SYMBOL(videobuf_dvb_register);
-EXPORT_SYMBOL(videobuf_dvb_unregister);
+EXPORT_SYMBOL(videobuf_dvb_register_bus);
+EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
+EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
+EXPORT_SYMBOL(videobuf_dvb_get_frontend);
+EXPORT_SYMBOL(videobuf_dvb_find_frontend);
 
 /* ------------------------------------------------------------------ */
 /*

include/media/videobuf-dvb.h

@@ -24,12 +24,42 @@ struct videobuf_dvb {
 	struct dvb_net             net;
 };
 
-int videobuf_dvb_register(struct videobuf_dvb *dvb,
+struct videobuf_dvb_frontend {
+	void *dev;
+	struct list_head felist;
+	int id;
+	struct videobuf_dvb dvb;
+};
+
+struct videobuf_dvb_frontends {
+	struct mutex lock;
+	struct dvb_adapter adapter;
+	int active_fe_id; /* Indicates which frontend in the felist is in use */
+	struct videobuf_dvb_frontend frontend;
+};
+
+int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
 			  struct module *module,
 			  void *adapter_priv,
 			  struct device *device,
-			  short *adapter_nr);
-void videobuf_dvb_unregister(struct videobuf_dvb *dvb);
+			  short *adapter_nr);   //NEW
+
+void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f);
+
+int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *f,
+			  struct module *module,
+			  void *adapter_priv,
+			  struct device *device,
+			  char *adapter_name,
+			  short *adapter_nr);   //NEW
+
+int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, struct videobuf_dvb *dvb);
+
+struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(void *private, struct videobuf_dvb_frontends *f, int id);
+
+struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id);
+int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, struct dvb_frontend *p);
+
 
 /*
  * Local variables: