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Commit 701b57ee authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[media] vb2: Add videobuf2-dvb support 



With the new vb2_thread_start/stop core code it is very easy to implement
videobuf2-dvb. This should simplify converting existing videobuf drivers to
vb2.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 3415a89f

drivers/media/v4l2-core/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -83,3 +83,7 @@ config VIDEOBUF2_DMA_SG 
	#depends on HAS_DMA

	select VIDEOBUF2_CORE

	select VIDEOBUF2_MEMOPS



config VIDEOBUF2_DVB

	tristate

	select VIDEOBUF2_CORE

drivers/media/v4l2-core/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ obj-$(CONFIG_VIDEOBUF2_MEMOPS) += videobuf2-memops.o 
obj-$(CONFIG_VIDEOBUF2_VMALLOC) += videobuf2-vmalloc.o

obj-$(CONFIG_VIDEOBUF2_DMA_CONTIG) += videobuf2-dma-contig.o

obj-$(CONFIG_VIDEOBUF2_DMA_SG) += videobuf2-dma-sg.o

obj-$(CONFIG_VIDEOBUF2_DVB) += videobuf2-dvb.o



ccflags-y += -I$(srctree)/drivers/media/dvb-core

ccflags-y += -I$(srctree)/drivers/media/dvb-frontends

drivers/media/v4l2-core/videobuf2-dvb.c

0 → 100644
+336 −0
Original line number Diff line number Diff line 
/*

 *

 * some helper function for simple DVB cards which simply DMA the

 * complete transport stream and let the computer sort everything else

 * (i.e. we are using the software demux, ...).  Also uses the

 * video-buf to manage DMA buffers.

 *

 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]

 *

 * 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.

 */



#include <linux/module.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/slab.h>



#include <media/videobuf2-dvb.h>



/* ------------------------------------------------------------------ */



MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");

MODULE_LICENSE("GPL");



/* ------------------------------------------------------------------ */



static int dvb_fnc(struct vb2_buffer *vb, void *priv)

{

	struct vb2_dvb *dvb = priv;



	dvb_dmx_swfilter(&dvb->demux, vb2_plane_vaddr(vb, 0),

				      vb2_get_plane_payload(vb, 0));

	return 0;

}



static int vb2_dvb_start_feed(struct dvb_demux_feed *feed)

{

	struct dvb_demux *demux = feed->demux;

	struct vb2_dvb *dvb = demux->priv;

	int rc = 0;



	if (!demux->dmx.frontend)

		return -EINVAL;



	mutex_lock(&dvb->lock);

	dvb->nfeeds++;



	if (!dvb->dvbq.threadio) {

		rc = vb2_thread_start(&dvb->dvbq, dvb_fnc, dvb, dvb->name);

		if (rc)

			dvb->nfeeds--;

	}

	if (!rc)

		rc = dvb->nfeeds;

	mutex_unlock(&dvb->lock);

	return rc;

}



static int vb2_dvb_stop_feed(struct dvb_demux_feed *feed)

{

	struct dvb_demux *demux = feed->demux;

	struct vb2_dvb *dvb = demux->priv;

	int err = 0;



	mutex_lock(&dvb->lock);

	dvb->nfeeds--;

	if (0 == dvb->nfeeds)

		err = vb2_thread_stop(&dvb->dvbq);

	mutex_unlock(&dvb->lock);

	return err;

}



static int vb2_dvb_register_adapter(struct vb2_dvb_frontends *fe,

			  struct module *module,

			  void *adapter_priv,

			  struct device *device,

			  char *adapter_name,

			  short *adapter_nr,

			  int mfe_shared)

{

	int result;



	mutex_init(&fe->lock);



	/* register adapter */

	result = dvb_register_adapter(&fe->adapter, adapter_name, module,

		device, adapter_nr);

	if (result < 0) {

		pr_warn("%s: dvb_register_adapter failed (errno = %d)\n",

		       adapter_name, result);

	}

	fe->adapter.priv = adapter_priv;

	fe->adapter.mfe_shared = mfe_shared;



	return result;

}



static int vb2_dvb_register_frontend(struct dvb_adapter *adapter,

	struct vb2_dvb *dvb)

{

	int result;



	/* register frontend */

	result = dvb_register_frontend(adapter, dvb->frontend);

	if (result < 0) {

		pr_warn("%s: dvb_register_frontend failed (errno = %d)\n",

		       dvb->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       = dvb;

	dvb->demux.filternum  = 256;

	dvb->demux.feednum    = 256;

	dvb->demux.start_feed = vb2_dvb_start_feed;

	dvb->demux.stop_feed  = vb2_dvb_stop_feed;

	result = dvb_dmx_init(&dvb->demux);

	if (result < 0) {

		pr_warn("%s: dvb_dmx_init failed (errno = %d)\n",

		       dvb->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, adapter);



	if (result < 0) {

		pr_warn("%s: dvb_dmxdev_init failed (errno = %d)\n",

		       dvb->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) {

		pr_warn("%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",

		       dvb->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) {

		pr_warn("%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",

		       dvb->name, result);

		goto fail_fe_mem;

	}



	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);

	if (result < 0) {

		pr_warn("%s: connect_frontend failed (errno = %d)\n",

		       dvb->name, result);

		goto fail_fe_conn;

	}



	/* register network adapter */

	result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);

	if (result < 0) {

		pr_warn("%s: dvb_net_init failed (errno = %d)\n",

		       dvb->name, result);

		goto fail_fe_conn;

	}

	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->frontend = NULL;



	return result;

}



/* ------------------------------------------------------------------ */

/* Register a single adapter and one or more frontends */

int vb2_dvb_register_bus(struct vb2_dvb_frontends *f,

			 struct module *module,

			 void *adapter_priv,

			 struct device *device,

			 short *adapter_nr,

			 int mfe_shared)

{

	struct list_head *list, *q;

	struct vb2_dvb_frontend *fe;

	int res;



	fe = vb2_dvb_get_frontend(f, 1);

	if (!fe) {

		pr_warn("Unable to register the adapter which has no frontends\n");

		return -EINVAL;

	}



	/* Bring up the adapter */

	res = vb2_dvb_register_adapter(f, module, adapter_priv, device,

		fe->dvb.name, adapter_nr, mfe_shared);

	if (res < 0) {

		pr_warn("vb2_dvb_register_adapter failed (errno = %d)\n", res);

		return res;

	}



	/* Attach all of the frontends to the adapter */

	mutex_lock(&f->lock);

	list_for_each_safe(list, q, &f->felist) {

		fe = list_entry(list, struct vb2_dvb_frontend, felist);

		res = vb2_dvb_register_frontend(&f->adapter, &fe->dvb);

		if (res < 0) {

			pr_warn("%s: vb2_dvb_register_frontend failed (errno = %d)\n",

				fe->dvb.name, res);

			goto err;

		}

	}

	mutex_unlock(&f->lock);

	return 0;



err:

	mutex_unlock(&f->lock);

	vb2_dvb_unregister_bus(f);

	return res;

}

EXPORT_SYMBOL(vb2_dvb_register_bus);



void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f)

{

	vb2_dvb_dealloc_frontends(f);



	dvb_unregister_adapter(&f->adapter);

}

EXPORT_SYMBOL(vb2_dvb_unregister_bus);



struct vb2_dvb_frontend *vb2_dvb_get_frontend(

	struct vb2_dvb_frontends *f, int id)

{

	struct list_head *list, *q;

	struct vb2_dvb_frontend *fe, *ret = NULL;



	mutex_lock(&f->lock);



	list_for_each_safe(list, q, &f->felist) {

		fe = list_entry(list, struct vb2_dvb_frontend, felist);

		if (fe->id == id) {

			ret = fe;

			break;

		}

	}



	mutex_unlock(&f->lock);



	return ret;

}

EXPORT_SYMBOL(vb2_dvb_get_frontend);



int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f,

	struct dvb_frontend *p)

{

	struct list_head *list, *q;

	struct vb2_dvb_frontend *fe = NULL;

	int ret = 0;



	mutex_lock(&f->lock);



	list_for_each_safe(list, q, &f->felist) {

		fe = list_entry(list, struct vb2_dvb_frontend, felist);

		if (fe->dvb.frontend == p) {

			ret = fe->id;

			break;

		}

	}



	mutex_unlock(&f->lock);



	return ret;

}

EXPORT_SYMBOL(vb2_dvb_find_frontend);



struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(

	struct vb2_dvb_frontends *f, int id)

{

	struct vb2_dvb_frontend *fe;



	fe = kzalloc(sizeof(struct vb2_dvb_frontend), GFP_KERNEL);

	if (fe == NULL)

		return NULL;



	fe->id = id;

	mutex_init(&fe->dvb.lock);



	mutex_lock(&f->lock);

	list_add_tail(&fe->felist, &f->felist);

	mutex_unlock(&f->lock);

	return fe;

}

EXPORT_SYMBOL(vb2_dvb_alloc_frontend);



void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f)

{

	struct list_head *list, *q;

	struct vb2_dvb_frontend *fe;



	mutex_lock(&f->lock);

	list_for_each_safe(list, q, &f->felist) {

		fe = list_entry(list, struct vb2_dvb_frontend, felist);

		if (fe->dvb.net.dvbdev) {

			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);

		}

		if (fe->dvb.frontend)

			/* always allocated, may have been reset */

			dvb_frontend_detach(fe->dvb.frontend);

		list_del(list); /* remove list entry */

		kfree(fe);	/* free frontend allocation */

	}

	mutex_unlock(&f->lock);

}

EXPORT_SYMBOL(vb2_dvb_dealloc_frontends);

include/media/videobuf2-dvb.h

0 → 100644
+58 −0
Original line number Diff line number Diff line 
#ifndef _VIDEOBUF2_DVB_H_

#define	_VIDEOBUF2_DVB_H_



#include <dvbdev.h>

#include <dmxdev.h>

#include <dvb_demux.h>

#include <dvb_net.h>

#include <dvb_frontend.h>

#include <media/videobuf2-core.h>



struct vb2_dvb {

	/* filling that the job of the driver */

	char			*name;

	struct dvb_frontend	*frontend;

	struct vb2_queue	dvbq;



	/* video-buf-dvb state info */

	struct mutex		lock;

	int			nfeeds;



	/* vb2_dvb_(un)register manages this */

	struct dvb_demux	demux;

	struct dmxdev		dmxdev;

	struct dmx_frontend	fe_hw;

	struct dmx_frontend	fe_mem;

	struct dvb_net		net;

};



struct vb2_dvb_frontend {

	struct list_head felist;

	int id;

	struct vb2_dvb dvb;

};



struct vb2_dvb_frontends {

	struct list_head felist;

	struct mutex lock;

	struct dvb_adapter adapter;

	int active_fe_id; /* Indicates which frontend in the felist is in use */

	int gate; /* Frontend with gate control 0=!MFE,1=fe0,2=fe1 etc */

};



int vb2_dvb_register_bus(struct vb2_dvb_frontends *f,

			 struct module *module,

			 void *adapter_priv,

			 struct device *device,

			 short *adapter_nr,

			 int mfe_shared);



void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f);



struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(struct vb2_dvb_frontends *f, int id);

void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f);



struct vb2_dvb_frontend *vb2_dvb_get_frontend(struct vb2_dvb_frontends *f, int id);

int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f, struct dvb_frontend *p);



#endif			/* _VIDEOBUF2_DVB_H_ */