[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / videobuf-dvb.c

/*
 *
 * 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/fs.h>
#include <linux/kthread.h>
#include <linux/file.h>

#include <linux/freezer.h>

#include <media/videobuf-core.h>
#include <media/videobuf-dvb.h>

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

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

static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"enable debug messages");

#define dprintk(fmt, arg...)	if (debug)			\
	printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)

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

static int videobuf_dvb_thread(void *data)
{
	struct videobuf_dvb *dvb = data;
	struct videobuf_buffer *buf;
	unsigned long flags;
	int err;
	void *outp;

	dprintk("dvb thread started\n");
	set_freezable();
	videobuf_read_start(&dvb->dvbq);

	for (;;) {
		/* fetch next buffer */
		buf = list_entry(dvb->dvbq.stream.next,
				 struct videobuf_buffer, stream);
		list_del(&buf->stream);
		err = videobuf_waiton(buf,0,1);

		/* no more feeds left or stop_feed() asked us to quit */
		if (0 == dvb->nfeeds)
			break;
		if (kthread_should_stop())
			break;
		try_to_freeze();

		/* feed buffer data to demux */
		outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf);

		if (buf->state == VIDEOBUF_DONE)
			dvb_dmx_swfilter(&dvb->demux, outp,
					 buf->size);

		/* requeue buffer */
		list_add_tail(&buf->stream,&dvb->dvbq.stream);
		spin_lock_irqsave(dvb->dvbq.irqlock,flags);
		dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
		spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
	}

	videobuf_read_stop(&dvb->dvbq);
	dprintk("dvb thread stopped\n");

	/* Hmm, linux becomes *very* unhappy without this ... */
	while (!kthread_should_stop()) {
		set_current_state(TASK_INTERRUPTIBLE);
		schedule();
	}
	return 0;
}

static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
{
	struct dvb_demux *demux  = feed->demux;
	struct videobuf_dvb *dvb = demux->priv;
	int rc;

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

	mutex_lock(&dvb->lock);
	dvb->nfeeds++;
	rc = dvb->nfeeds;

	if (NULL != dvb->thread)
		goto out;
	dvb->thread = kthread_run(videobuf_dvb_thread,
				  dvb, "%s dvb", dvb->name);
	if (IS_ERR(dvb->thread)) {
		rc = PTR_ERR(dvb->thread);
		dvb->thread = NULL;
	}

out:
	mutex_unlock(&dvb->lock);
	return rc;
}

static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
{
	struct dvb_demux *demux  = feed->demux;
	struct videobuf_dvb *dvb = demux->priv;
	int err = 0;

	mutex_lock(&dvb->lock);
	dvb->nfeeds--;
	if (0 == dvb->nfeeds  &&  NULL != dvb->thread) {
		// FIXME: cx8802_cancel_buffers(dev);
		err = kthread_stop(dvb->thread);
		dvb->thread = NULL;
	}
	mutex_unlock(&dvb->lock);
	return err;
}

/* ------------------------------------------------------------------ */
/* 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,
			  int mfe_shared)
{
	struct list_head *list, *q;
	struct videobuf_dvb_frontend *fe;
	int res;

	fe = videobuf_dvb_get_frontend(f, 1);
	if (!fe) {
		printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
		return -EINVAL;
	}

	/* Bring up the adapter */
	res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, fe->dvb.name, adapter_nr, mfe_shared);
	if (res < 0) {
		printk(KERN_WARNING "videobuf_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 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);
			goto err;
		}
	}
	mutex_unlock(&f->lock);
	return 0;

err:
	mutex_unlock(&f->lock);
	videobuf_dvb_unregister_bus(f);
	return res;
}

int videobuf_dvb_register_adapter(struct videobuf_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) {
		printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
		       adapter_name, result);
	}
	fe->adapter.priv = adapter_priv;
	fe->adapter.mfe_shared = mfe_shared;

	return result;
}

int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, struct videobuf_dvb *dvb)
{
	int result;

	/* register 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);
		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 = videobuf_dvb_start_feed;
	dvb->demux.stop_feed  = videobuf_dvb_stop_feed;
	result = dvb_dmx_init(&dvb->demux);
	if (result < 0) {
		printk(KERN_WARNING "%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) {
		printk(KERN_WARNING "%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) {
		printk(KERN_WARNING "%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) {
		printk(KERN_WARNING "%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) {
		printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
		       dvb->name, result);
		goto fail_fe_conn;
	}

	/* register network adapter */
	dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
	if (dvb->net.dvbdev == NULL) {
		result = -ENOMEM;
		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;
}

void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
{
	struct list_head *list, *q;
	struct videobuf_dvb_frontend *fe;

	mutex_lock(&f->lock);
	list_for_each_safe(list, q, &f->felist) {
		fe = list_entry(list, struct videobuf_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);
		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->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->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(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->id = id;
	mutex_init(&fe->dvb.lock);

	mutex_lock(&f->lock);
	list_add_tail(&fe->felist,&f->felist);
	mutex_unlock(&f->lock);

fail_alloc:
	return fe;
}

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);

/* ------------------------------------------------------------------ */
/*
 * Local variables:
 * c-basic-offset: 8
 * compile-command: "make DVB=1"
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	*
	3	* some helper function for simple DVB cards which simply DMA the
	4	* complete transport stream and let the computer sort everything else
	5	* (i.e. we are using the software demux, ...). Also uses the
	6	* video-buf to manage DMA buffers.
	7	*
	8	* (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/device.h>
	19	#include <linux/fs.h>
	20	#include <linux/kthread.h>
	21	#include <linux/file.h>
59d34489	22
7dfb7103	23	#include <linux/freezer.h>
1da177e4	24
59d34489	25	#include <media/videobuf-core.h>
ba366a23	26	#include <media/videobuf-dvb.h>
1da177e4 LT	27
	28	/* ------------------------------------------------------------------ */
	29
	30	MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
	31	MODULE_LICENSE("GPL");
	32
ff699e6b	33	static unsigned int debug;
1da177e4 LT	34	module_param(debug, int, 0644);
	35	MODULE_PARM_DESC(debug,"enable debug messages");
	36
	37	#define dprintk(fmt, arg...) if (debug) \
	38	printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)
	39
	40	/* ------------------------------------------------------------------ */
	41
	42	static int videobuf_dvb_thread(void *data)
	43	{
	44	struct videobuf_dvb *dvb = data;
	45	struct videobuf_buffer *buf;
	46	unsigned long flags;
	47	int err;
59d34489	48	void *outp;
1da177e4 LT	49
1da177e4 LT	50	dprintk("dvb thread started\n");
83144186	51	set_freezable();
1da177e4 LT	52	videobuf_read_start(&dvb->dvbq);
	53
	54	for (;;) {
	55	/* fetch next buffer */
	56	buf = list_entry(dvb->dvbq.stream.next,
	57	struct videobuf_buffer, stream);
	58	list_del(&buf->stream);
	59	err = videobuf_waiton(buf,0,1);
1da177e4 LT	60
	61	/* no more feeds left or stop_feed() asked us to quit */
	62	if (0 == dvb->nfeeds)
	63	break;
	64	if (kthread_should_stop())
	65	break;
3e1d1d28	66	try_to_freeze();
1da177e4 LT	67
1da177e4 LT	68	/* feed buffer data to demux */
59d34489 MCC	69	outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf);
59d34489 MCC	70
0fc0686e	71	if (buf->state == VIDEOBUF_DONE)
59d34489	72	dvb_dmx_swfilter(&dvb->demux, outp,
1da177e4 LT	73	buf->size);
	74
	75	/* requeue buffer */
	76	list_add_tail(&buf->stream,&dvb->dvbq.stream);
	77	spin_lock_irqsave(dvb->dvbq.irqlock,flags);
	78	dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
	79	spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
	80	}
	81
	82	videobuf_read_stop(&dvb->dvbq);
	83	dprintk("dvb thread stopped\n");
	84
	85	/* Hmm, linux becomes very unhappy without this ... */
	86	while (!kthread_should_stop()) {
	87	set_current_state(TASK_INTERRUPTIBLE);
	88	schedule();
	89	}
	90	return 0;
	91	}
	92
	93	static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
	94	{
	95	struct dvb_demux *demux = feed->demux;
	96	struct videobuf_dvb *dvb = demux->priv;
	97	int rc;
	98
	99	if (!demux->dmx.frontend)
	100	return -EINVAL;
	101
3593cab5	102	mutex_lock(&dvb->lock);
1da177e4 LT	103	dvb->nfeeds++;
	104	rc = dvb->nfeeds;
	105
	106	if (NULL != dvb->thread)
	107	goto out;
	108	dvb->thread = kthread_run(videobuf_dvb_thread,
	109	dvb, "%s dvb", dvb->name);
	110	if (IS_ERR(dvb->thread)) {
	111	rc = PTR_ERR(dvb->thread);
	112	dvb->thread = NULL;
	113	}
	114
	115	out:
3593cab5	116	mutex_unlock(&dvb->lock);
1da177e4 LT	117	return rc;
	118	}
	119
	120	static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
	121	{
	122	struct dvb_demux *demux = feed->demux;
	123	struct videobuf_dvb *dvb = demux->priv;
	124	int err = 0;
	125
3593cab5	126	mutex_lock(&dvb->lock);
1da177e4 LT	127	dvb->nfeeds--;
	128	if (0 == dvb->nfeeds && NULL != dvb->thread) {
	129	// FIXME: cx8802_cancel_buffers(dev);
	130	err = kthread_stop(dvb->thread);
	131	dvb->thread = NULL;
	132	}
3593cab5	133	mutex_unlock(&dvb->lock);
1da177e4 LT	134	return err;
	135	}
	136
	137	/* ------------------------------------------------------------------ */
363c35fc ST	138	/* Register a single adapter and one or more frontends */
	139	int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
	140	struct module *module,
	141	void *adapter_priv,
	142	struct device *device,
59b1842d DB	143	short *adapter_nr,
59b1842d DB	144	int mfe_shared)
363c35fc ST	145	{
	146	struct list_head list, q;
	147	struct videobuf_dvb_frontend *fe;
e43f3fab	148	int res;
363c35fc ST	149
	150	fe = videobuf_dvb_get_frontend(f, 1);
	151	if (!fe) {
	152	printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
e43f3fab	153	return -EINVAL;
363c35fc ST	154	}
	155
	156	/* Bring up the adapter */
59b1842d	157	res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, fe->dvb.name, adapter_nr, mfe_shared);
363c35fc ST	158	if (res < 0) {
363c35fc ST	159	printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
e43f3fab	160	return res;
363c35fc	161	}
1da177e4	162
363c35fc ST	163	/* Attach all of the frontends to the adapter */
363c35fc ST	164	mutex_lock(&f->lock);
7bdf84fc	165	list_for_each_safe(list, q, &f->felist) {
363c35fc	166	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
363c35fc ST	167	res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
	168	if (res < 0) {
	169	printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
	170	fe->dvb.name, res);
e43f3fab	171	goto err;
363c35fc ST	172	}
	173	}
	174	mutex_unlock(&f->lock);
e43f3fab	175	return 0;
363c35fc ST	176
363c35fc ST	177	err:
e43f3fab DB	178	mutex_unlock(&f->lock);
e43f3fab DB	179	videobuf_dvb_unregister_bus(f);
363c35fc ST	180	return res;
	181	}
	182
	183	int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
1da177e4	184	struct module *module,
d09dbf92	185	void *adapter_priv,
78e92006	186	struct device *device,
363c35fc	187	char *adapter_name,
59b1842d DB	188	short *adapter_nr,
59b1842d DB	189	int mfe_shared)
1da177e4 LT	190	{
	191	int result;
	192
363c35fc	193	mutex_init(&fe->lock);
1da177e4 LT	194
1da177e4 LT	195	/* register adapter */
363c35fc	196	result = dvb_register_adapter(&fe->adapter, adapter_name, module, device, adapter_nr);
1da177e4 LT	197	if (result < 0) {
1da177e4 LT	198	printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
363c35fc	199	adapter_name, result);
1da177e4	200	}
363c35fc	201	fe->adapter.priv = adapter_priv;
59b1842d	202	fe->adapter.mfe_shared = mfe_shared;
363c35fc ST	203
	204	return result;
	205	}
	206
	207	int videobuf_dvb_register_frontend(struct dvb_adapter adapter, struct videobuf_dvb dvb)
	208	{
	209	int result;
1da177e4 LT	210
1da177e4 LT	211	/* register frontend */
363c35fc	212	result = dvb_register_frontend(adapter, dvb->frontend);
1da177e4 LT	213	if (result < 0) {
	214	printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
	215	dvb->name, result);
	216	goto fail_frontend;
	217	}
	218
	219	/* register demux stuff */
	220	dvb->demux.dmx.capabilities =
	221	DMX_TS_FILTERING \| DMX_SECTION_FILTERING \|
	222	DMX_MEMORY_BASED_FILTERING;
	223	dvb->demux.priv = dvb;
	224	dvb->demux.filternum = 256;
	225	dvb->demux.feednum = 256;
	226	dvb->demux.start_feed = videobuf_dvb_start_feed;
	227	dvb->demux.stop_feed = videobuf_dvb_stop_feed;
	228	result = dvb_dmx_init(&dvb->demux);
	229	if (result < 0) {
	230	printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
	231	dvb->name, result);
	232	goto fail_dmx;
	233	}
	234
	235	dvb->dmxdev.filternum = 256;
	236	dvb->dmxdev.demux = &dvb->demux.dmx;
	237	dvb->dmxdev.capabilities = 0;
363c35fc ST	238	result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
363c35fc ST	239
1da177e4 LT	240	if (result < 0) {
	241	printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
	242	dvb->name, result);
	243	goto fail_dmxdev;
	244	}
	245
	246	dvb->fe_hw.source = DMX_FRONTEND_0;
	247	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	248	if (result < 0) {
	249	printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
	250	dvb->name, result);
	251	goto fail_fe_hw;
	252	}
	253
	254	dvb->fe_mem.source = DMX_MEMORY_FE;
	255	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	256	if (result < 0) {
	257	printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
	258	dvb->name, result);
	259	goto fail_fe_mem;
	260	}
	261
	262	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	263	if (result < 0) {
	264	printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
	265	dvb->name, result);
	266	goto fail_fe_conn;
	267	}
	268
	269	/* register network adapter */
363c35fc	270	dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
e43f3fab DB	271	if (dvb->net.dvbdev == NULL) {
	272	result = -ENOMEM;
	273	goto fail_fe_conn;
	274	}
1da177e4 LT	275	return 0;
	276
	277	fail_fe_conn:
	278	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	279	fail_fe_mem:
	280	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	281	fail_fe_hw:
	282	dvb_dmxdev_release(&dvb->dmxdev);
	283	fail_dmxdev:
	284	dvb_dmx_release(&dvb->demux);
	285	fail_dmx:
	286	dvb_unregister_frontend(dvb->frontend);
	287	fail_frontend:
f52a838b	288	dvb_frontend_detach(dvb->frontend);
e43f3fab	289	dvb->frontend = NULL;
363c35fc	290
1da177e4 LT	291	return result;
	292	}
	293
363c35fc	294	void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
1da177e4	295	{
363c35fc ST	296	struct list_head list, q;
	297	struct videobuf_dvb_frontend *fe;
	298
	299	mutex_lock(&f->lock);
7bdf84fc	300	list_for_each_safe(list, q, &f->felist) {
363c35fc	301	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
e43f3fab DB	302	if(fe->dvb.net.dvbdev) {
	303	dvb_net_release(&fe->dvb.net);
	304	fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_mem);
	305	fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_hw);
	306	dvb_dmxdev_release(&fe->dvb.dmxdev);
	307	dvb_dmx_release(&fe->dvb.demux);
	308	dvb_unregister_frontend(fe->dvb.frontend);
	309	}
96b7a1a8	310	if(fe->dvb.frontend) /* always allocated, may have been reset */
e43f3fab	311	dvb_frontend_detach(fe->dvb.frontend);
363c35fc ST	312	list_del(list);
	313	kfree(fe);
	314	}
	315	mutex_unlock(&f->lock);
	316
	317	dvb_unregister_adapter(&f->adapter);
	318	}
	319
	320	struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id)
	321	{
	322	struct list_head list, q;
	323	struct videobuf_dvb_frontend fe, ret = NULL;
	324
	325	mutex_lock(&f->lock);
	326
7bdf84fc	327	list_for_each_safe(list, q, &f->felist) {
363c35fc ST	328	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	329	if (fe->id == id) {
	330	ret = fe;
	331	break;
	332	}
	333	}
	334
	335	mutex_unlock(&f->lock);
	336
	337	return ret;
	338	}
	339
	340	int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends f, struct dvb_frontend p)
	341	{
	342	struct list_head list, q;
	343	struct videobuf_dvb_frontend *fe = NULL;
	344	int ret = 0;
	345
	346	mutex_lock(&f->lock);
	347
7bdf84fc	348	list_for_each_safe(list, q, &f->felist) {
363c35fc ST	349	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	350	if (fe->dvb.frontend == p) {
	351	ret = fe->id;
	352	break;
	353	}
	354	}
	355
	356	mutex_unlock(&f->lock);
	357
	358	return ret;
	359	}
	360
96b7a1a8	361	struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(struct videobuf_dvb_frontends *f, int id)
363c35fc ST	362	{
	363	struct videobuf_dvb_frontend *fe;
	364
	365	fe = kzalloc(sizeof(struct videobuf_dvb_frontend),GFP_KERNEL);
	366	if (fe == NULL)
	367	goto fail_alloc;
	368
363c35fc ST	369	fe->id = id;
	370	mutex_init(&fe->dvb.lock);
	371
	372	mutex_lock(&f->lock);
7bdf84fc	373	list_add_tail(&fe->felist,&f->felist);
363c35fc ST	374	mutex_unlock(&f->lock);
	375
	376	fail_alloc:
	377	return fe;
1da177e4 LT	378	}
1da177e4 LT	379
363c35fc ST	380	EXPORT_SYMBOL(videobuf_dvb_register_bus);
	381	EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
	382	EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
	383	EXPORT_SYMBOL(videobuf_dvb_get_frontend);
	384	EXPORT_SYMBOL(videobuf_dvb_find_frontend);
1da177e4 LT	385
	386	/* ------------------------------------------------------------------ */
	387	/*
	388	* Local variables:
	389	* c-basic-offset: 8
	390	* compile-command: "make DVB=1"
	391	* End:
	392	*/