[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 <media/v4l2-common.h>
#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);
4286c6f6	27	*
1da177e4 LT	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 */
5e87efa3	37	#include <media/v4l2-common.h>
1da177e4 LT	38	#include <linux/config.h> /* CONFIG_RADIO_RTRACK_PORT */
	39	#include <asm/semaphore.h> /* Lock for the I/O */
	40
	41	#ifndef CONFIG_RADIO_RTRACK_PORT
	42	#define CONFIG_RADIO_RTRACK_PORT -1
	43	#endif
	44
4286c6f6	45	static int io = CONFIG_RADIO_RTRACK_PORT;
1da177e4	46	static int radio_nr = -1;
3593cab5	47	static struct mutex lock;
1da177e4 LT	48
	49	struct rt_device
	50	{
	51	int port;
	52	int curvol;
	53	unsigned long curfreq;
	54	int muted;
	55	};
	56
	57
	58	/* local things */
	59
	60	static void sleep_delay(long n)
	61	{
	62	/* Sleep nicely for 'n' uS */
	63	int d=n/(1000000/HZ);
	64	if(!d)
	65	udelay(n);
	66	else
	67	msleep(jiffies_to_msecs(d));
	68	}
	69
	70	static void rt_decvol(void)
	71	{
	72	outb(0x58, io); /* volume down + sigstr + on */
	73	sleep_delay(100000);
	74	outb(0xd8, io); /* volume steady + sigstr + on */
	75	}
	76
	77	static void rt_incvol(void)
	78	{
	79	outb(0x98, io); /* volume up + sigstr + on */
	80	sleep_delay(100000);
	81	outb(0xd8, io); /* volume steady + sigstr + on */
	82	}
	83
	84	static void rt_mute(struct rt_device *dev)
	85	{
	86	dev->muted = 1;
3593cab5	87	mutex_lock(&lock);
1da177e4	88	outb(0xd0, io); /* volume steady, off */
3593cab5	89	mutex_unlock(&lock);
1da177e4 LT	90	}
	91
	92	static int rt_setvol(struct rt_device *dev, int vol)
	93	{
	94	int i;
	95
3593cab5	96	mutex_lock(&lock);
4286c6f6	97
1da177e4 LT	98	if(vol == dev->curvol) { /* requested volume = current */
	99	if (dev->muted) { /* user is unmuting the card */
	100	dev->muted = 0;
	101	outb (0xd8, io); /* enable card */
4286c6f6	102	}
3593cab5	103	mutex_unlock(&lock);
1da177e4 LT	104	return 0;
	105	}
	106
	107	if(vol == 0) { /* volume = 0 means mute the card */
	108	outb(0x48, io); /* volume down but still "on" */
	109	sleep_delay(2000000); /* make sure it's totally down */
	110	outb(0xd0, io); /* volume steady, off */
	111	dev->curvol = 0; /* track the volume state! */
3593cab5	112	mutex_unlock(&lock);
1da177e4 LT	113	return 0;
	114	}
	115
	116	dev->muted = 0;
	117	if(vol > dev->curvol)
4286c6f6	118	for(i = dev->curvol; i < vol; i++)
1da177e4 LT	119	rt_incvol();
1da177e4 LT	120	else
4286c6f6	121	for(i = dev->curvol; i > vol; i--)
1da177e4 LT	122	rt_decvol();
	123
	124	dev->curvol = vol;
3593cab5	125	mutex_unlock(&lock);
1da177e4 LT	126	return 0;
	127	}
	128
4286c6f6	129	/* the 128+64 on these outb's is to keep the volume stable while tuning
1da177e4 LT	130	* without them, the volume _will_ creep up with each frequency change
	131	* and bit 4 (+16) is to keep the signal strength meter enabled
	132	*/
	133
	134	static void send_0_byte(int port, struct rt_device *dev)
	135	{
	136	if ((dev->curvol == 0) \|\| (dev->muted)) {
	137	outb_p(128+64+16+ 1, port); /* wr-enable + data low */
	138	outb_p(128+64+16+2+1, port); /* clock */
	139	}
	140	else {
	141	outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */
	142	outb_p(128+64+16+8+2+1, port); /* clock */
	143	}
4286c6f6	144	sleep_delay(1000);
1da177e4 LT	145	}
	146
	147	static void send_1_byte(int port, struct rt_device *dev)
	148	{
	149	if ((dev->curvol == 0) \|\| (dev->muted)) {
	150	outb_p(128+64+16+4 +1, port); /* wr-enable+data high */
	151	outb_p(128+64+16+4+2+1, port); /* clock */
4286c6f6	152	}
1da177e4 LT	153	else {
	154	outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */
	155	outb_p(128+64+16+8+4+2+1, port); /* clock */
	156	}
	157
4286c6f6	158	sleep_delay(1000);
1da177e4 LT	159	}
	160
	161	static int rt_setfreq(struct rt_device *dev, unsigned long freq)
	162	{
	163	int i;
	164
	165	/* adapted from radio-aztech.c */
	166
	167	/* now uses VIDEO_TUNER_LOW for fine tuning */
	168
	169	freq += 171200; /* Add 10.7 MHz IF */
	170	freq /= 800; /* Convert to 50 kHz units */
4286c6f6	171
3593cab5	172	mutex_lock(&lock); /* Stop other ops interfering */
4286c6f6	173
1da177e4 LT	174	send_0_byte (io, dev); /* 0: LSB of frequency */
	175
	176	for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
	177	if (freq & (1 << i))
	178	send_1_byte (io, dev);
	179	else
	180	send_0_byte (io, dev);
	181
	182	send_0_byte (io, dev); /* 14: test bit - always 0 */
	183	send_0_byte (io, dev); /* 15: test bit - always 0 */
	184
	185	send_0_byte (io, dev); /* 16: band data 0 - always 0 */
	186	send_0_byte (io, dev); /* 17: band data 1 - always 0 */
	187	send_0_byte (io, dev); /* 18: band data 2 - always 0 */
	188	send_0_byte (io, dev); /* 19: time base - always 0 */
	189
	190	send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */
	191	send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */
	192	send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */
	193	send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */
	194
	195	if ((dev->curvol == 0) \|\| (dev->muted))
	196	outb (0xd0, io); /* volume steady + sigstr */
	197	else
	198	outb (0xd8, io); /* volume steady + sigstr + on */
4286c6f6	199
3593cab5	200	mutex_unlock(&lock);
1da177e4 LT	201
	202	return 0;
	203	}
	204
	205	static int rt_getsigstr(struct rt_device *dev)
	206	{
	207	if (inb(io) & 2) /* bit set = no signal present */
	208	return 0;
	209	return 1; /* signal present */
	210	}
	211
	212	static int rt_do_ioctl(struct inode inode, struct file file,
	213	unsigned int cmd, void *arg)
	214	{
	215	struct video_device *dev = video_devdata(file);
	216	struct rt_device *rt=dev->priv;
4286c6f6	217
1da177e4 LT	218	switch(cmd)
	219	{
	220	case VIDIOCGCAP:
	221	{
	222	struct video_capability *v = arg;
	223	memset(v,0,sizeof(*v));
	224	v->type=VID_TYPE_TUNER;
	225	v->channels=1;
	226	v->audios=1;
	227	strcpy(v->name, "RadioTrack");
	228	return 0;
	229	}
	230	case VIDIOCGTUNER:
	231	{
	232	struct video_tuner *v = arg;
4286c6f6	233	if(v->tuner) /* Only 1 tuner */
1da177e4 LT	234	return -EINVAL;
	235	v->rangelow=(87*16000);
	236	v->rangehigh=(108*16000);
	237	v->flags=VIDEO_TUNER_LOW;
	238	v->mode=VIDEO_MODE_AUTO;
	239	strcpy(v->name, "FM");
	240	v->signal=0xFFFF*rt_getsigstr(rt);
	241	return 0;
	242	}
	243	case VIDIOCSTUNER:
	244	{
	245	struct video_tuner *v = arg;
	246	if(v->tuner!=0)
	247	return -EINVAL;
	248	/* Only 1 tuner so no setting needed ! */
	249	return 0;
	250	}
	251	case VIDIOCGFREQ:
	252	{
	253	unsigned long *freq = arg;
	254	*freq = rt->curfreq;
	255	return 0;
	256	}
	257	case VIDIOCSFREQ:
	258	{
	259	unsigned long *freq = arg;
	260	rt->curfreq = *freq;
	261	rt_setfreq(rt, rt->curfreq);
	262	return 0;
	263	}
	264	case VIDIOCGAUDIO:
4286c6f6	265	{
1da177e4 LT	266	struct video_audio *v = arg;
	267	memset(v,0, sizeof(*v));
	268	v->flags\|=VIDEO_AUDIO_MUTABLE\|VIDEO_AUDIO_VOLUME;
	269	v->volume=rt->curvol * 6554;
	270	v->step=6554;
	271	strcpy(v->name, "Radio");
4286c6f6	272	return 0;
1da177e4 LT	273	}
	274	case VIDIOCSAUDIO:
	275	{
	276	struct video_audio *v = arg;
4286c6f6	277	if(v->audio)
1da177e4	278	return -EINVAL;
4286c6f6	279	if(v->flags&VIDEO_AUDIO_MUTE)
1da177e4 LT	280	rt_mute(rt);
	281	else
	282	rt_setvol(rt,v->volume/6554);
	283	return 0;
	284	}
	285	default:
	286	return -ENOIOCTLCMD;
	287	}
	288	}
	289
	290	static int rt_ioctl(struct inode inode, struct file file,
	291	unsigned int cmd, unsigned long arg)
	292	{
	293	return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
	294	}
	295
	296	static struct rt_device rtrack_unit;
	297
	298	static struct file_operations rtrack_fops = {
	299	.owner = THIS_MODULE,
	300	.open = video_exclusive_open,
	301	.release = video_exclusive_release,
4286c6f6	302	.ioctl = rt_ioctl,
0d0fbf81	303	.compat_ioctl = v4l_compat_ioctl32,
1da177e4 LT	304	.llseek = no_llseek,
	305	};
	306
	307	static struct video_device rtrack_radio=
	308	{
	309	.owner = THIS_MODULE,
	310	.name = "RadioTrack radio",
	311	.type = VID_TYPE_TUNER,
	312	.hardware = VID_HARDWARE_RTRACK,
	313	.fops = &rtrack_fops,
	314	};
	315
	316	static int __init rtrack_init(void)
	317	{
	318	if(io==-1)
	319	{
	320	printk(KERN_ERR "You must set an I/O address with io=0x???\n");
	321	return -EINVAL;
	322	}
	323
4286c6f6	324	if (!request_region(io, 2, "rtrack"))
1da177e4 LT	325	{
	326	printk(KERN_ERR "rtrack: port 0x%x already in use\n", io);
	327	return -EBUSY;
	328	}
	329
	330	rtrack_radio.priv=&rtrack_unit;
4286c6f6	331
1da177e4 LT	332	if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1)
	333	{
	334	release_region(io, 2);
	335	return -EINVAL;
	336	}
	337	printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n");
	338
	339	/* Set up the I/O locking */
4286c6f6	340
3593cab5	341	mutex_init(&lock);
4286c6f6 MCC	342
4286c6f6 MCC	343	/* mute card - prevents noisy bootups */
1da177e4 LT	344
	345	/* this ensures that the volume is all the way down */
	346	outb(0x48, io); /* volume down but still "on" */
	347	sleep_delay(2000000); /* make sure it's totally down */
	348	outb(0xc0, io); /* steady volume, mute card */
	349	rtrack_unit.curvol = 0;
	350
	351	return 0;
	352	}
	353
	354	MODULE_AUTHOR("M.Kirkwood");
	355	MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
	356	MODULE_LICENSE("GPL");
	357
	358	module_param(io, int, 0);
	359	MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
	360	module_param(radio_nr, int, 0);
	361
	362	static void __exit cleanup_rtrack_module(void)
	363	{
	364	video_unregister_device(&rtrack_radio);
	365	release_region(io,2);
	366	}
	367
	368	module_init(rtrack_init);
	369	module_exit(cleanup_rtrack_module);
	370