[deliverable/linux.git] / drivers / media / radio / radio-aimslab.c

/* radiotrack (radioreveal) driver for Linux radio support
 * (c) 1997 M. Kirkwood
 * Converted to new API by Alan Cox <Alan.Cox@linux.org>
 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
 *
 * History:
 * 1999-02-24	Russell Kroll <rkroll@exploits.org>
 * 		Fine tuning/VIDEO_TUNER_LOW
 *		Frequency range expanded to start at 87 MHz
 *
 * TODO: Allow for more than one of these foolish entities :-)
 *
 * Notes on the hardware (reverse engineered from other peoples'
 * reverse engineering of AIMS' code :-)
 *
 *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
 *
 *  The signal strength query is unsurprisingly inaccurate.  And it seems
 *  to indicate that (on my card, at least) the frequency setting isn't
 *  too great.  (I have to tune up .025MHz from what the freq should be
 *  to get a report that the thing is tuned.)
 *
 *  Volume control is (ugh) analogue:
 *   out(port, start_increasing_volume);
 *   wait(a_wee_while);
 *   out(port, stop_changing_the_volume);
 *  
 */

#include <linux/module.h>	/* Modules 			*/
#include <linux/init.h>		/* Initdata			*/
#include <linux/ioport.h>	/* request_region		*/
#include <linux/delay.h>	/* udelay			*/
#include <asm/io.h>		/* outb, outb_p			*/
#include <asm/uaccess.h>	/* copy to/from user		*/
#include <linux/videodev.h>	/* kernel radio structs		*/
#include <linux/config.h>	/* CONFIG_RADIO_RTRACK_PORT 	*/
#include <asm/semaphore.h>	/* Lock for the I/O 		*/

#ifndef CONFIG_RADIO_RTRACK_PORT
#define CONFIG_RADIO_RTRACK_PORT -1
#endif

static int io = CONFIG_RADIO_RTRACK_PORT; 
static int radio_nr = -1;
static struct mutex lock;

struct rt_device
{
	int port;
	int curvol;
	unsigned long curfreq;
	int muted;
};


/* local things */

static void sleep_delay(long n)
{
	/* Sleep nicely for 'n' uS */
	int d=n/(1000000/HZ);
	if(!d)
		udelay(n);
	else
		msleep(jiffies_to_msecs(d));
}

static void rt_decvol(void)
{
	outb(0x58, io);		/* volume down + sigstr + on	*/
	sleep_delay(100000);
	outb(0xd8, io);		/* volume steady + sigstr + on	*/
}

static void rt_incvol(void)
{
	outb(0x98, io);		/* volume up + sigstr + on	*/
	sleep_delay(100000);
	outb(0xd8, io);		/* volume steady + sigstr + on	*/
}

static void rt_mute(struct rt_device *dev)
{
	dev->muted = 1;
	mutex_lock(&lock);
	outb(0xd0, io);			/* volume steady, off		*/
	mutex_unlock(&lock);
}

static int rt_setvol(struct rt_device *dev, int vol)
{
	int i;

	mutex_lock(&lock);
	
	if(vol == dev->curvol) {	/* requested volume = current */
		if (dev->muted) {	/* user is unmuting the card  */
			dev->muted = 0;
			outb (0xd8, io);	/* enable card */
		}	
		mutex_unlock(&lock);
		return 0;
	}

	if(vol == 0) {			/* volume = 0 means mute the card */
		outb(0x48, io);		/* volume down but still "on"	*/
		sleep_delay(2000000);	/* make sure it's totally down	*/
		outb(0xd0, io);		/* volume steady, off		*/
		dev->curvol = 0;	/* track the volume state!	*/
		mutex_unlock(&lock);
		return 0;
	}

	dev->muted = 0;
	if(vol > dev->curvol)
		for(i = dev->curvol; i < vol; i++) 
			rt_incvol();
	else
		for(i = dev->curvol; i > vol; i--) 
			rt_decvol();

	dev->curvol = vol;
	mutex_unlock(&lock);
	return 0;
}

/* the 128+64 on these outb's is to keep the volume stable while tuning 
 * without them, the volume _will_ creep up with each frequency change
 * and bit 4 (+16) is to keep the signal strength meter enabled
 */

static void send_0_byte(int port, struct rt_device *dev)
{
	if ((dev->curvol == 0) || (dev->muted)) {
		outb_p(128+64+16+  1, port);   /* wr-enable + data low */
		outb_p(128+64+16+2+1, port);   /* clock */
	}
	else {
		outb_p(128+64+16+8+  1, port);  /* on + wr-enable + data low */
		outb_p(128+64+16+8+2+1, port);  /* clock */
	}
	sleep_delay(1000); 
}

static void send_1_byte(int port, struct rt_device *dev)
{
	if ((dev->curvol == 0) || (dev->muted)) {
		outb_p(128+64+16+4  +1, port);   /* wr-enable+data high */
		outb_p(128+64+16+4+2+1, port);   /* clock */
	} 
	else {
		outb_p(128+64+16+8+4  +1, port); /* on+wr-enable+data high */
		outb_p(128+64+16+8+4+2+1, port); /* clock */
	}

	sleep_delay(1000); 
}

static int rt_setfreq(struct rt_device *dev, unsigned long freq)
{
	int i;

	/* adapted from radio-aztech.c */

	/* now uses VIDEO_TUNER_LOW for fine tuning */

	freq += 171200;			/* Add 10.7 MHz IF 		*/
	freq /= 800;			/* Convert to 50 kHz units	*/
	
	mutex_lock(&lock);			/* Stop other ops interfering */
	 
	send_0_byte (io, dev);		/*  0: LSB of frequency		*/

	for (i = 0; i < 13; i++)	/*   : frequency bits (1-13)	*/
		if (freq & (1 << i))
			send_1_byte (io, dev);
		else
			send_0_byte (io, dev);

	send_0_byte (io, dev);		/* 14: test bit - always 0    */
	send_0_byte (io, dev);		/* 15: test bit - always 0    */

	send_0_byte (io, dev);		/* 16: band data 0 - always 0 */
	send_0_byte (io, dev);		/* 17: band data 1 - always 0 */
	send_0_byte (io, dev);		/* 18: band data 2 - always 0 */
	send_0_byte (io, dev);		/* 19: time base - always 0   */

	send_0_byte (io, dev);		/* 20: spacing (0 = 25 kHz)   */
	send_1_byte (io, dev);		/* 21: spacing (1 = 25 kHz)   */
	send_0_byte (io, dev);		/* 22: spacing (0 = 25 kHz)   */
	send_1_byte (io, dev);		/* 23: AM/FM (FM = 1, always) */

	if ((dev->curvol == 0) || (dev->muted))
		outb (0xd0, io);	/* volume steady + sigstr */
	else
		outb (0xd8, io);	/* volume steady + sigstr + on */
		
	mutex_unlock(&lock);

	return 0;
}

static int rt_getsigstr(struct rt_device *dev)
{
	if (inb(io) & 2)	/* bit set = no signal present	*/
		return 0;
	return 1;		/* signal present		*/
}

static int rt_do_ioctl(struct inode *inode, struct file *file,
		       unsigned int cmd, void *arg)
{
	struct video_device *dev = video_devdata(file);
	struct rt_device *rt=dev->priv;
	
	switch(cmd)
	{
		case VIDIOCGCAP:
		{
			struct video_capability *v = arg;
			memset(v,0,sizeof(*v));
			v->type=VID_TYPE_TUNER;
			v->channels=1;
			v->audios=1;
			strcpy(v->name, "RadioTrack");
			return 0;
		}
		case VIDIOCGTUNER:
		{
			struct video_tuner *v = arg;
			if(v->tuner)	/* Only 1 tuner */ 
				return -EINVAL;
			v->rangelow=(87*16000);
			v->rangehigh=(108*16000);
			v->flags=VIDEO_TUNER_LOW;
			v->mode=VIDEO_MODE_AUTO;
			strcpy(v->name, "FM");
			v->signal=0xFFFF*rt_getsigstr(rt);
			return 0;
		}
		case VIDIOCSTUNER:
		{
			struct video_tuner *v = arg;
			if(v->tuner!=0)
				return -EINVAL;
			/* Only 1 tuner so no setting needed ! */
			return 0;
		}
		case VIDIOCGFREQ:
		{
			unsigned long *freq = arg;
			*freq = rt->curfreq;
			return 0;
		}
		case VIDIOCSFREQ:
		{
			unsigned long *freq = arg;
			rt->curfreq = *freq;
			rt_setfreq(rt, rt->curfreq);
			return 0;
		}
		case VIDIOCGAUDIO:
		{	
			struct video_audio *v = arg;
			memset(v,0, sizeof(*v));
			v->flags|=VIDEO_AUDIO_MUTABLE|VIDEO_AUDIO_VOLUME;
			v->volume=rt->curvol * 6554;
			v->step=6554;
			strcpy(v->name, "Radio");
			return 0;			
		}
		case VIDIOCSAUDIO:
		{
			struct video_audio *v = arg;
			if(v->audio) 
				return -EINVAL;
			if(v->flags&VIDEO_AUDIO_MUTE) 
				rt_mute(rt);
			else
				rt_setvol(rt,v->volume/6554);
			return 0;
		}
		default:
			return -ENOIOCTLCMD;
	}
}

static int rt_ioctl(struct inode *inode, struct file *file,
		    unsigned int cmd, unsigned long arg)
{
	return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
}

static struct rt_device rtrack_unit;

static struct file_operations rtrack_fops = {
	.owner		= THIS_MODULE,
	.open           = video_exclusive_open,
	.release        = video_exclusive_release,
	.ioctl	        = rt_ioctl,
	.compat_ioctl	= v4l_compat_ioctl32,
	.llseek         = no_llseek,
};

static struct video_device rtrack_radio=
{
	.owner		= THIS_MODULE,
	.name		= "RadioTrack radio",
	.type		= VID_TYPE_TUNER,
	.hardware	= VID_HARDWARE_RTRACK,
	.fops           = &rtrack_fops,
};

static int __init rtrack_init(void)
{
	if(io==-1)
	{
		printk(KERN_ERR "You must set an I/O address with io=0x???\n");
		return -EINVAL;
	}

	if (!request_region(io, 2, "rtrack")) 
	{
		printk(KERN_ERR "rtrack: port 0x%x already in use\n", io);
		return -EBUSY;
	}

	rtrack_radio.priv=&rtrack_unit;
	
	if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1)
	{
		release_region(io, 2);
		return -EINVAL;
	}
	printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n");

	/* Set up the I/O locking */
	
	mutex_init(&lock);
	
 	/* mute card - prevents noisy bootups */

	/* this ensures that the volume is all the way down  */
	outb(0x48, io);		/* volume down but still "on"	*/
	sleep_delay(2000000);	/* make sure it's totally down	*/
	outb(0xc0, io);		/* steady volume, mute card	*/
	rtrack_unit.curvol = 0;

	return 0;
}

MODULE_AUTHOR("M.Kirkwood");
MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
MODULE_LICENSE("GPL");

module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
module_param(radio_nr, int, 0);

static void __exit cleanup_rtrack_module(void)
{
	video_unregister_device(&rtrack_radio);
	release_region(io,2);
}

module_init(rtrack_init);
module_exit(cleanup_rtrack_module);
Commit	Line	Data
1da177e4 LT	1	/* radiotrack (radioreveal) driver for Linux radio support
	2	* (c) 1997 M. Kirkwood
	3	* Converted to new API by Alan Cox <Alan.Cox@linux.org>
	4	* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
	5	*
	6	* History:
	7	* 1999-02-24 Russell Kroll <rkroll@exploits.org>
	8	* Fine tuning/VIDEO_TUNER_LOW
	9	* Frequency range expanded to start at 87 MHz
	10	*
	11	* TODO: Allow for more than one of these foolish entities :-)
	12	*
	13	* Notes on the hardware (reverse engineered from other peoples'
	14	* reverse engineering of AIMS' code :-)
	15	*
	16	* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
	17	*
	18	* The signal strength query is unsurprisingly inaccurate. And it seems
	19	* to indicate that (on my card, at least) the frequency setting isn't
	20	* too great. (I have to tune up .025MHz from what the freq should be
	21	* to get a report that the thing is tuned.)
	22	*
	23	* Volume control is (ugh) analogue:
	24	* out(port, start_increasing_volume);
	25	* wait(a_wee_while);
	26	* out(port, stop_changing_the_volume);
	27	*
	28	*/
	29
	30	#include <linux/module.h> /* Modules */
	31	#include <linux/init.h> /* Initdata */
fb911ee8	32	#include <linux/ioport.h> /* request_region */
1da177e4 LT	33	#include <linux/delay.h> /* udelay */
	34	#include <asm/io.h> /* outb, outb_p */
	35	#include <asm/uaccess.h> /* copy to/from user */
	36	#include <linux/videodev.h> /* kernel radio structs */
	37	#include <linux/config.h> /* CONFIG_RADIO_RTRACK_PORT */
	38	#include <asm/semaphore.h> /* Lock for the I/O */
	39
	40	#ifndef CONFIG_RADIO_RTRACK_PORT
	41	#define CONFIG_RADIO_RTRACK_PORT -1
	42	#endif
	43
	44	static int io = CONFIG_RADIO_RTRACK_PORT;
	45	static int radio_nr = -1;
3593cab5	46	static struct mutex lock;
1da177e4 LT	47
	48	struct rt_device
	49	{
	50	int port;
	51	int curvol;
	52	unsigned long curfreq;
	53	int muted;
	54	};
	55
	56
	57	/* local things */
	58
	59	static void sleep_delay(long n)
	60	{
	61	/* Sleep nicely for 'n' uS */
	62	int d=n/(1000000/HZ);
	63	if(!d)
	64	udelay(n);
	65	else
	66	msleep(jiffies_to_msecs(d));
	67	}
	68
	69	static void rt_decvol(void)
	70	{
	71	outb(0x58, io); /* volume down + sigstr + on */
	72	sleep_delay(100000);
	73	outb(0xd8, io); /* volume steady + sigstr + on */
	74	}
	75
	76	static void rt_incvol(void)
	77	{
	78	outb(0x98, io); /* volume up + sigstr + on */
	79	sleep_delay(100000);
	80	outb(0xd8, io); /* volume steady + sigstr + on */
	81	}
	82
	83	static void rt_mute(struct rt_device *dev)
	84	{
	85	dev->muted = 1;
3593cab5	86	mutex_lock(&lock);
1da177e4	87	outb(0xd0, io); /* volume steady, off */
3593cab5	88	mutex_unlock(&lock);
1da177e4 LT	89	}
	90
	91	static int rt_setvol(struct rt_device *dev, int vol)
	92	{
	93	int i;
	94
3593cab5	95	mutex_lock(&lock);
1da177e4 LT	96
	97	if(vol == dev->curvol) { /* requested volume = current */
	98	if (dev->muted) { /* user is unmuting the card */
	99	dev->muted = 0;
	100	outb (0xd8, io); /* enable card */
	101	}
3593cab5	102	mutex_unlock(&lock);
1da177e4 LT	103	return 0;
	104	}
	105
	106	if(vol == 0) { /* volume = 0 means mute the card */
	107	outb(0x48, io); /* volume down but still "on" */
	108	sleep_delay(2000000); /* make sure it's totally down */
	109	outb(0xd0, io); /* volume steady, off */
	110	dev->curvol = 0; /* track the volume state! */
3593cab5	111	mutex_unlock(&lock);
1da177e4 LT	112	return 0;
	113	}
	114
	115	dev->muted = 0;
	116	if(vol > dev->curvol)
	117	for(i = dev->curvol; i < vol; i++)
	118	rt_incvol();
	119	else
	120	for(i = dev->curvol; i > vol; i--)
	121	rt_decvol();
	122
	123	dev->curvol = vol;
3593cab5	124	mutex_unlock(&lock);
1da177e4 LT	125	return 0;
	126	}
	127
	128	/* the 128+64 on these outb's is to keep the volume stable while tuning
	129	* without them, the volume _will_ creep up with each frequency change
	130	* and bit 4 (+16) is to keep the signal strength meter enabled
	131	*/
	132
	133	static void send_0_byte(int port, struct rt_device *dev)
	134	{
	135	if ((dev->curvol == 0) \|\| (dev->muted)) {
	136	outb_p(128+64+16+ 1, port); /* wr-enable + data low */
	137	outb_p(128+64+16+2+1, port); /* clock */
	138	}
	139	else {
	140	outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */
	141	outb_p(128+64+16+8+2+1, port); /* clock */
	142	}
	143	sleep_delay(1000);
	144	}
	145
	146	static void send_1_byte(int port, struct rt_device *dev)
	147	{
	148	if ((dev->curvol == 0) \|\| (dev->muted)) {
	149	outb_p(128+64+16+4 +1, port); /* wr-enable+data high */
	150	outb_p(128+64+16+4+2+1, port); /* clock */
	151	}
	152	else {
	153	outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */
	154	outb_p(128+64+16+8+4+2+1, port); /* clock */
	155	}
	156
	157	sleep_delay(1000);
	158	}
	159
	160	static int rt_setfreq(struct rt_device *dev, unsigned long freq)
	161	{
	162	int i;
	163
	164	/* adapted from radio-aztech.c */
	165
	166	/* now uses VIDEO_TUNER_LOW for fine tuning */
	167
	168	freq += 171200; /* Add 10.7 MHz IF */
	169	freq /= 800; /* Convert to 50 kHz units */
	170
3593cab5	171	mutex_lock(&lock); /* Stop other ops interfering */
1da177e4 LT	172
	173	send_0_byte (io, dev); /* 0: LSB of frequency */
	174
	175	for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
	176	if (freq & (1 << i))
	177	send_1_byte (io, dev);
	178	else
	179	send_0_byte (io, dev);
	180
	181	send_0_byte (io, dev); /* 14: test bit - always 0 */
	182	send_0_byte (io, dev); /* 15: test bit - always 0 */
	183
	184	send_0_byte (io, dev); /* 16: band data 0 - always 0 */
	185	send_0_byte (io, dev); /* 17: band data 1 - always 0 */
	186	send_0_byte (io, dev); /* 18: band data 2 - always 0 */
	187	send_0_byte (io, dev); /* 19: time base - always 0 */
	188
	189	send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */
	190	send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */
	191	send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */
	192	send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */
	193
	194	if ((dev->curvol == 0) \|\| (dev->muted))
	195	outb (0xd0, io); /* volume steady + sigstr */
	196	else
	197	outb (0xd8, io); /* volume steady + sigstr + on */
	198
3593cab5	199	mutex_unlock(&lock);
1da177e4 LT	200
	201	return 0;
	202	}
	203
	204	static int rt_getsigstr(struct rt_device *dev)
	205	{
	206	if (inb(io) & 2) /* bit set = no signal present */
	207	return 0;
	208	return 1; /* signal present */
	209	}
	210
	211	static int rt_do_ioctl(struct inode inode, struct file file,
	212	unsigned int cmd, void *arg)
	213	{
	214	struct video_device *dev = video_devdata(file);
	215	struct rt_device *rt=dev->priv;
	216
	217	switch(cmd)
	218	{
	219	case VIDIOCGCAP:
	220	{
	221	struct video_capability *v = arg;
	222	memset(v,0,sizeof(*v));
	223	v->type=VID_TYPE_TUNER;
	224	v->channels=1;
	225	v->audios=1;
	226	strcpy(v->name, "RadioTrack");
	227	return 0;
	228	}
	229	case VIDIOCGTUNER:
	230	{
	231	struct video_tuner *v = arg;
	232	if(v->tuner) /* Only 1 tuner */
	233	return -EINVAL;
	234	v->rangelow=(87*16000);
	235	v->rangehigh=(108*16000);
	236	v->flags=VIDEO_TUNER_LOW;
	237	v->mode=VIDEO_MODE_AUTO;
	238	strcpy(v->name, "FM");
	239	v->signal=0xFFFF*rt_getsigstr(rt);
	240	return 0;
	241	}
	242	case VIDIOCSTUNER:
	243	{
	244	struct video_tuner *v = arg;
	245	if(v->tuner!=0)
	246	return -EINVAL;
	247	/* Only 1 tuner so no setting needed ! */
	248	return 0;
	249	}
	250	case VIDIOCGFREQ:
	251	{
	252	unsigned long *freq = arg;
	253	*freq = rt->curfreq;
	254	return 0;
	255	}
	256	case VIDIOCSFREQ:
	257	{
	258	unsigned long *freq = arg;
	259	rt->curfreq = *freq;
	260	rt_setfreq(rt, rt->curfreq);
	261	return 0;
	262	}
	263	case VIDIOCGAUDIO:
264	{
265	struct video_audio *v = arg;
266	memset(v,0, sizeof(*v));
267	v->flags\|=VIDEO_AUDIO_MUTABLE\|VIDEO_AUDIO_VOLUME;
268	v->volume=rt->curvol * 6554;
269	v->step=6554;
270	strcpy(v->name, "Radio");
271	return 0;
272	}
273	case VIDIOCSAUDIO:
274	{
275	struct video_audio *v = arg;
276	if(v->audio)
277	return -EINVAL;
278	if(v->flags&VIDEO_AUDIO_MUTE)
279	rt_mute(rt);
280	else
281	rt_setvol(rt,v->volume/6554);
282	return 0;
283	}
284	default:
285	return -ENOIOCTLCMD;
286	}
287	}
288
289	static int rt_ioctl(struct inode inode, struct file file,
290	unsigned int cmd, unsigned long arg)
291	{
292	return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
293	}
294
295	static struct rt_device rtrack_unit;
296
297	static struct file_operations rtrack_fops = {
298	.owner = THIS_MODULE,
299	.open = video_exclusive_open,
300	.release = video_exclusive_release,
301	.ioctl = rt_ioctl,
0d0fbf81	302	.compat_ioctl = v4l_compat_ioctl32,
1da177e4 LT	303	.llseek = no_llseek,
	304	};
	305
	306	static struct video_device rtrack_radio=
	307	{
	308	.owner = THIS_MODULE,
	309	.name = "RadioTrack radio",
	310	.type = VID_TYPE_TUNER,
	311	.hardware = VID_HARDWARE_RTRACK,
	312	.fops = &rtrack_fops,
	313	};
	314
	315	static int __init rtrack_init(void)
	316	{
	317	if(io==-1)
	318	{
	319	printk(KERN_ERR "You must set an I/O address with io=0x???\n");
	320	return -EINVAL;
	321	}
	322
	323	if (!request_region(io, 2, "rtrack"))
	324	{
	325	printk(KERN_ERR "rtrack: port 0x%x already in use\n", io);
	326	return -EBUSY;
	327	}
	328
	329	rtrack_radio.priv=&rtrack_unit;
	330
	331	if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1)
	332	{
	333	release_region(io, 2);
	334	return -EINVAL;
	335	}
	336	printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n");
	337
	338	/* Set up the I/O locking */
	339
3593cab5	340	mutex_init(&lock);
1da177e4 LT	341
	342	/* mute card - prevents noisy bootups */
	343
	344	/* this ensures that the volume is all the way down */
	345	outb(0x48, io); /* volume down but still "on" */
	346	sleep_delay(2000000); /* make sure it's totally down */
	347	outb(0xc0, io); /* steady volume, mute card */
	348	rtrack_unit.curvol = 0;
	349
	350	return 0;
	351	}
	352
	353	MODULE_AUTHOR("M.Kirkwood");
	354	MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
	355	MODULE_LICENSE("GPL");
	356
	357	module_param(io, int, 0);
	358	MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
	359	module_param(radio_nr, int, 0);
	360
	361	static void __exit cleanup_rtrack_module(void)
	362	{
	363	video_unregister_device(&rtrack_radio);
	364	release_region(io,2);
	365	}
	366
	367	module_init(rtrack_init);
	368	module_exit(cleanup_rtrack_module);
	369