[linux-2.6-block.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/slab.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(&dvb->dvbq, 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_vaddr(&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) {
		err = kthread_stop(dvb->thread);
		dvb->thread = NULL;
	}
	mutex_unlock(&dvb->lock);
	return err;
}

static 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 (*fe_ioctl_override)(struct dvb_frontend *,
					unsigned int, void *, unsigned int))
{
	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;
	fe->adapter.fe_ioctl_override = fe_ioctl_override;

	return result;
}

static 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 */
	result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
	if (result < 0) {
		printk(KERN_WARNING "%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 videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
			  struct module *module,
			  void *adapter_priv,
			  struct device *device,
			  short *adapter_nr,
			  int mfe_shared,
			  int (*fe_ioctl_override)(struct dvb_frontend *,
					unsigned int, void *, unsigned int))
{
	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, fe_ioctl_override);
	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;
}
EXPORT_SYMBOL(videobuf_dvb_register_bus);

void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
{
	videobuf_dvb_dealloc_frontends(f);

	dvb_unregister_adapter(&f->adapter);
}
EXPORT_SYMBOL(videobuf_dvb_unregister_bus);

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;
}
EXPORT_SYMBOL(videobuf_dvb_get_frontend);

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;
}
EXPORT_SYMBOL(videobuf_dvb_find_frontend);

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_alloc_frontend);

void videobuf_dvb_dealloc_frontends(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); /* remove list entry */
		kfree(fe);	/* free frontend allocation */
	}
	mutex_unlock(&f->lock);
}
EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);
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>
5a0e3ad6	22	#include <linux/slab.h>
59d34489	23
7dfb7103	24	#include <linux/freezer.h>
1da177e4	25
59d34489	26	#include <media/videobuf-core.h>
ba366a23	27	#include <media/videobuf-dvb.h>
1da177e4 LT	28
	29	/* ------------------------------------------------------------------ */
	30
	31	MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
	32	MODULE_LICENSE("GPL");
	33
ff699e6b	34	static unsigned int debug;
1da177e4 LT	35	module_param(debug, int, 0644);
	36	MODULE_PARM_DESC(debug,"enable debug messages");
	37
	38	#define dprintk(fmt, arg...) if (debug) \
	39	printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)
	40
	41	/* ------------------------------------------------------------------ */
	42
	43	static int videobuf_dvb_thread(void *data)
	44	{
	45	struct videobuf_dvb *dvb = data;
	46	struct videobuf_buffer *buf;
	47	unsigned long flags;
	48	int err;
59d34489	49	void *outp;
1da177e4 LT	50
1da177e4 LT	51	dprintk("dvb thread started\n");
83144186	52	set_freezable();
1da177e4 LT	53	videobuf_read_start(&dvb->dvbq);
	54
	55	for (;;) {
	56	/* fetch next buffer */
	57	buf = list_entry(dvb->dvbq.stream.next,
	58	struct videobuf_buffer, stream);
	59	list_del(&buf->stream);
0e0809a5	60	err = videobuf_waiton(&dvb->dvbq, buf, 0, 1);
1da177e4 LT	61
	62	/* no more feeds left or stop_feed() asked us to quit */
	63	if (0 == dvb->nfeeds)
	64	break;
	65	if (kthread_should_stop())
	66	break;
3e1d1d28	67	try_to_freeze();
1da177e4 LT	68
1da177e4 LT	69	/* feed buffer data to demux */
f4fce60e	70	outp = videobuf_queue_to_vaddr(&dvb->dvbq, buf);
59d34489	71
0fc0686e	72	if (buf->state == VIDEOBUF_DONE)
59d34489	73	dvb_dmx_swfilter(&dvb->demux, outp,
1da177e4 LT	74	buf->size);
	75
	76	/* requeue buffer */
	77	list_add_tail(&buf->stream,&dvb->dvbq.stream);
	78	spin_lock_irqsave(dvb->dvbq.irqlock,flags);
	79	dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
	80	spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
	81	}
	82
	83	videobuf_read_stop(&dvb->dvbq);
	84	dprintk("dvb thread stopped\n");
	85
	86	/* Hmm, linux becomes very unhappy without this ... */
	87	while (!kthread_should_stop()) {
	88	set_current_state(TASK_INTERRUPTIBLE);
	89	schedule();
	90	}
	91	return 0;
	92	}
	93
	94	static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
	95	{
	96	struct dvb_demux *demux = feed->demux;
	97	struct videobuf_dvb *dvb = demux->priv;
	98	int rc;
	99
	100	if (!demux->dmx.frontend)
	101	return -EINVAL;
	102
3593cab5	103	mutex_lock(&dvb->lock);
1da177e4 LT	104	dvb->nfeeds++;
	105	rc = dvb->nfeeds;
	106
	107	if (NULL != dvb->thread)
	108	goto out;
	109	dvb->thread = kthread_run(videobuf_dvb_thread,
	110	dvb, "%s dvb", dvb->name);
	111	if (IS_ERR(dvb->thread)) {
	112	rc = PTR_ERR(dvb->thread);
	113	dvb->thread = NULL;
	114	}
	115
	116	out:
3593cab5	117	mutex_unlock(&dvb->lock);
1da177e4 LT	118	return rc;
	119	}
	120
	121	static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
	122	{
	123	struct dvb_demux *demux = feed->demux;
	124	struct videobuf_dvb *dvb = demux->priv;
	125	int err = 0;
	126
3593cab5	127	mutex_lock(&dvb->lock);
1da177e4 LT	128	dvb->nfeeds--;
1da177e4 LT	129	if (0 == dvb->nfeeds && NULL != dvb->thread) {
1da177e4 LT	130	err = kthread_stop(dvb->thread);
	131	dvb->thread = NULL;
	132	}
3593cab5	133	mutex_unlock(&dvb->lock);
1da177e4 LT	134	return err;
	135	}
	136
dcadd082	137	static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
1da177e4	138	struct module *module,
d09dbf92	139	void *adapter_priv,
78e92006	140	struct device *device,
363c35fc	141	char *adapter_name,
59b1842d	142	short *adapter_nr,
9133aee0 MK	143	int mfe_shared,
	144	int (fe_ioctl_override)(struct dvb_frontend ,
	145	unsigned int, void *, unsigned int))
1da177e4 LT	146	{
	147	int result;
	148
363c35fc	149	mutex_init(&fe->lock);
1da177e4 LT	150
1da177e4 LT	151	/* register adapter */
11fbedd3 ST	152	result = dvb_register_adapter(&fe->adapter, adapter_name, module,
11fbedd3 ST	153	device, adapter_nr);
1da177e4 LT	154	if (result < 0) {
1da177e4 LT	155	printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
363c35fc	156	adapter_name, result);
1da177e4	157	}
363c35fc	158	fe->adapter.priv = adapter_priv;
59b1842d	159	fe->adapter.mfe_shared = mfe_shared;
9133aee0	160	fe->adapter.fe_ioctl_override = fe_ioctl_override;
363c35fc ST	161
	162	return result;
	163	}
	164
dcadd082	165	static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
11fbedd3	166	struct videobuf_dvb *dvb)
363c35fc ST	167	{
363c35fc ST	168	int result;
1da177e4 LT	169
1da177e4 LT	170	/* register frontend */
363c35fc	171	result = dvb_register_frontend(adapter, dvb->frontend);
1da177e4 LT	172	if (result < 0) {
	173	printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
	174	dvb->name, result);
	175	goto fail_frontend;
	176	}
	177
	178	/* register demux stuff */
	179	dvb->demux.dmx.capabilities =
	180	DMX_TS_FILTERING \| DMX_SECTION_FILTERING \|
	181	DMX_MEMORY_BASED_FILTERING;
	182	dvb->demux.priv = dvb;
	183	dvb->demux.filternum = 256;
	184	dvb->demux.feednum = 256;
	185	dvb->demux.start_feed = videobuf_dvb_start_feed;
	186	dvb->demux.stop_feed = videobuf_dvb_stop_feed;
	187	result = dvb_dmx_init(&dvb->demux);
	188	if (result < 0) {
	189	printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
	190	dvb->name, result);
	191	goto fail_dmx;
	192	}
	193
	194	dvb->dmxdev.filternum = 256;
	195	dvb->dmxdev.demux = &dvb->demux.dmx;
	196	dvb->dmxdev.capabilities = 0;
363c35fc ST	197	result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
363c35fc ST	198
1da177e4 LT	199	if (result < 0) {
	200	printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
	201	dvb->name, result);
	202	goto fail_dmxdev;
	203	}
	204
	205	dvb->fe_hw.source = DMX_FRONTEND_0;
	206	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	207	if (result < 0) {
	208	printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
	209	dvb->name, result);
	210	goto fail_fe_hw;
	211	}
	212
	213	dvb->fe_mem.source = DMX_MEMORY_FE;
	214	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	215	if (result < 0) {
	216	printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
	217	dvb->name, result);
	218	goto fail_fe_mem;
	219	}
	220
	221	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	222	if (result < 0) {
	223	printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
	224	dvb->name, result);
	225	goto fail_fe_conn;
	226	}
	227
	228	/* register network adapter */
5c96ebb7 JN	229	result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
	230	if (result < 0) {
	231	printk(KERN_WARNING "%s: dvb_net_init failed (errno = %d)\n",
	232	dvb->name, result);
e43f3fab DB	233	goto fail_fe_conn;
e43f3fab DB	234	}
1da177e4 LT	235	return 0;
	236
	237	fail_fe_conn:
	238	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	239	fail_fe_mem:
	240	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	241	fail_fe_hw:
	242	dvb_dmxdev_release(&dvb->dmxdev);
	243	fail_dmxdev:
	244	dvb_dmx_release(&dvb->demux);
	245	fail_dmx:
	246	dvb_unregister_frontend(dvb->frontend);
	247	fail_frontend:
f52a838b	248	dvb_frontend_detach(dvb->frontend);
e43f3fab	249	dvb->frontend = NULL;
363c35fc	250
1da177e4 LT	251	return result;
	252	}
	253
dcadd082 MCC	254	/* ------------------------------------------------------------------ */
	255	/* Register a single adapter and one or more frontends */
	256	int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
	257	struct module *module,
	258	void *adapter_priv,
	259	struct device *device,
	260	short *adapter_nr,
9133aee0 MK	261	int mfe_shared,
	262	int (fe_ioctl_override)(struct dvb_frontend ,
	263	unsigned int, void *, unsigned int))
dcadd082 MCC	264	{
	265	struct list_head list, q;
	266	struct videobuf_dvb_frontend *fe;
	267	int res;
	268
	269	fe = videobuf_dvb_get_frontend(f, 1);
	270	if (!fe) {
	271	printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
	272	return -EINVAL;
	273	}
	274
	275	/* Bring up the adapter */
	276	res = videobuf_dvb_register_adapter(f, module, adapter_priv, device,
9133aee0	277	fe->dvb.name, adapter_nr, mfe_shared, fe_ioctl_override);
dcadd082 MCC	278	if (res < 0) {
	279	printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
	280	return res;
	281	}
	282
	283	/* Attach all of the frontends to the adapter */
	284	mutex_lock(&f->lock);
	285	list_for_each_safe(list, q, &f->felist) {
	286	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	287	res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
	288	if (res < 0) {
	289	printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
	290	fe->dvb.name, res);
	291	goto err;
	292	}
	293	}
	294	mutex_unlock(&f->lock);
	295	return 0;
	296
	297	err:
	298	mutex_unlock(&f->lock);
	299	videobuf_dvb_unregister_bus(f);
	300	return res;
	301	}
	302	EXPORT_SYMBOL(videobuf_dvb_register_bus);
	303
363c35fc	304	void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
1da177e4	305	{
878595f6	306	videobuf_dvb_dealloc_frontends(f);
363c35fc ST	307
	308	dvb_unregister_adapter(&f->adapter);
	309	}
11fbedd3	310	EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
363c35fc	311
11fbedd3 ST	312	struct videobuf_dvb_frontend *videobuf_dvb_get_frontend(
11fbedd3 ST	313	struct videobuf_dvb_frontends *f, int id)
363c35fc ST	314	{
	315	struct list_head list, q;
	316	struct videobuf_dvb_frontend fe, ret = NULL;
	317
	318	mutex_lock(&f->lock);
	319
7bdf84fc	320	list_for_each_safe(list, q, &f->felist) {
363c35fc ST	321	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	322	if (fe->id == id) {
	323	ret = fe;
	324	break;
	325	}
	326	}
	327
	328	mutex_unlock(&f->lock);
	329
	330	return ret;
	331	}
11fbedd3	332	EXPORT_SYMBOL(videobuf_dvb_get_frontend);
363c35fc	333
11fbedd3 ST	334	int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f,
11fbedd3 ST	335	struct dvb_frontend *p)
363c35fc ST	336	{
	337	struct list_head list, q;
	338	struct videobuf_dvb_frontend *fe = NULL;
	339	int ret = 0;
	340
	341	mutex_lock(&f->lock);
	342
7bdf84fc	343	list_for_each_safe(list, q, &f->felist) {
363c35fc ST	344	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	345	if (fe->dvb.frontend == p) {
	346	ret = fe->id;
	347	break;
	348	}
	349	}
	350
	351	mutex_unlock(&f->lock);
	352
	353	return ret;
	354	}
11fbedd3	355	EXPORT_SYMBOL(videobuf_dvb_find_frontend);
363c35fc	356
11fbedd3 ST	357	struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend(
11fbedd3 ST	358	struct videobuf_dvb_frontends *f, int id)
363c35fc ST	359	{
	360	struct videobuf_dvb_frontend *fe;
	361
11fbedd3	362	fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL);
363c35fc ST	363	if (fe == NULL)
	364	goto fail_alloc;
	365
363c35fc ST	366	fe->id = id;
	367	mutex_init(&fe->dvb.lock);
	368
	369	mutex_lock(&f->lock);
11fbedd3	370	list_add_tail(&fe->felist, &f->felist);
363c35fc ST	371	mutex_unlock(&f->lock);
	372
	373	fail_alloc:
	374	return fe;
1da177e4	375	}
363c35fc	376	EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
878595f6 DB	377
	378	void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f)
	379	{
	380	struct list_head list, q;
	381	struct videobuf_dvb_frontend *fe;
	382
	383	mutex_lock(&f->lock);
	384	list_for_each_safe(list, q, &f->felist) {
	385	fe = list_entry(list, struct videobuf_dvb_frontend, felist);
	386	if (fe->dvb.net.dvbdev) {
	387	dvb_net_release(&fe->dvb.net);
	388	fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
	389	&fe->dvb.fe_mem);
	390	fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
	391	&fe->dvb.fe_hw);
	392	dvb_dmxdev_release(&fe->dvb.dmxdev);
	393	dvb_dmx_release(&fe->dvb.demux);
	394	dvb_unregister_frontend(fe->dvb.frontend);
	395	}
	396	if (fe->dvb.frontend)
	397	/* always allocated, may have been reset */
	398	dvb_frontend_detach(fe->dvb.frontend);
	399	list_del(list); /* remove list entry */
	400	kfree(fe); /* free frontend allocation */
	401	}
	402	mutex_unlock(&f->lock);
	403	}
	404	EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);