[deliverable/linux.git] / drivers / media / radio / radio-rtrack2.c

/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
 *
 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
 *
 * TODO: Allow for more than one of these foolish entities :-)
 *
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
 */

#include <linux/module.h>	/* Modules 			*/
#include <linux/init.h>		/* Initdata			*/
#include <linux/ioport.h>	/* request_region		*/
#include <linux/delay.h>	/* udelay			*/
#include <linux/videodev2.h>	/* kernel radio structs		*/
#include <linux/mutex.h>
#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
#include <linux/io.h>		/* outb, outb_p			*/
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>

MODULE_AUTHOR("Ben Pfaff");
MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
MODULE_LICENSE("GPL");

#ifndef CONFIG_RADIO_RTRACK2_PORT
#define CONFIG_RADIO_RTRACK2_PORT -1
#endif

static int io = CONFIG_RADIO_RTRACK2_PORT;
static int radio_nr = -1;

module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
module_param(radio_nr, int, 0);

#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)

struct rtrack2
{
	struct v4l2_device v4l2_dev;
	struct video_device vdev;
	int io;
	unsigned long curfreq;
	int muted;
	struct mutex lock;
};

static struct rtrack2 rtrack2_card;


/* local things */

static void rt_mute(struct rtrack2 *dev)
{
	if (dev->muted)
		return;
	mutex_lock(&dev->lock);
	outb(1, dev->io);
	mutex_unlock(&dev->lock);
	dev->muted = 1;
}

static void rt_unmute(struct rtrack2 *dev)
{
	if(dev->muted == 0)
		return;
	mutex_lock(&dev->lock);
	outb(0, dev->io);
	mutex_unlock(&dev->lock);
	dev->muted = 0;
}

static void zero(struct rtrack2 *dev)
{
	outb_p(1, dev->io);
	outb_p(3, dev->io);
	outb_p(1, dev->io);
}

static void one(struct rtrack2 *dev)
{
	outb_p(5, dev->io);
	outb_p(7, dev->io);
	outb_p(5, dev->io);
}

static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
{
	int i;

	mutex_lock(&dev->lock);
	dev->curfreq = freq;
	freq = freq / 200 + 856;

	outb_p(0xc8, dev->io);
	outb_p(0xc9, dev->io);
	outb_p(0xc9, dev->io);

	for (i = 0; i < 10; i++)
		zero(dev);

	for (i = 14; i >= 0; i--)
		if (freq & (1 << i))
			one(dev);
		else
			zero(dev);

	outb_p(0xc8, dev->io);
	if (!dev->muted)
		outb_p(0, dev->io);

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

static int vidioc_querycap(struct file *file, void *priv,
				struct v4l2_capability *v)
{
	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
	strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
	v->version = RADIO_VERSION;
	v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
	return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
				struct v4l2_tuner *v)
{
	return v->index ? -EINVAL : 0;
}

static int rt_getsigstr(struct rtrack2 *dev)
{
	int sig = 1;

	mutex_lock(&dev->lock);
	if (inb(dev->io) & 2)	/* bit set = no signal present	*/
		sig = 0;
	mutex_unlock(&dev->lock);
	return sig;
}

static int vidioc_g_tuner(struct file *file, void *priv,
				struct v4l2_tuner *v)
{
	struct rtrack2 *rt = video_drvdata(file);

	if (v->index > 0)
		return -EINVAL;

	strlcpy(v->name, "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = 88 * 16000;
	v->rangehigh = 108 * 16000;
	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	v->capability = V4L2_TUNER_CAP_LOW;
	v->audmode = V4L2_TUNER_MODE_MONO;
	v->signal = 0xFFFF * rt_getsigstr(rt);
	return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct rtrack2 *rt = video_drvdata(file);

	rt_setfreq(rt, f->frequency);
	return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct rtrack2 *rt = video_drvdata(file);

	f->type = V4L2_TUNER_RADIO;
	f->frequency = rt->curfreq;
	return 0;
}

static int vidioc_queryctrl(struct file *file, void *priv,
				struct v4l2_queryctrl *qc)
{
	switch (qc->id) {
	case V4L2_CID_AUDIO_MUTE:
		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
	case V4L2_CID_AUDIO_VOLUME:
		return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
	}
	return -EINVAL;
}

static int vidioc_g_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctrl)
{
	struct rtrack2 *rt = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = rt->muted;
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		if (rt->muted)
			ctrl->value = 0;
		else
			ctrl->value = 65535;
		return 0;
	}
	return -EINVAL;
}

static int vidioc_s_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctrl)
{
	struct rtrack2 *rt = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		if (ctrl->value)
			rt_mute(rt);
		else
			rt_unmute(rt);
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		if (ctrl->value)
			rt_unmute(rt);
		else
			rt_mute(rt);
		return 0;
	}
	return -EINVAL;
}

static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
{
	*i = 0;
	return 0;
}

static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
{
	return i ? -EINVAL : 0;
}

static int vidioc_g_audio(struct file *file, void *priv,
				struct v4l2_audio *a)
{
	a->index = 0;
	strlcpy(a->name, "Radio", sizeof(a->name));
	a->capability = V4L2_AUDCAP_STEREO;
	return 0;
}

static int vidioc_s_audio(struct file *file, void *priv,
				struct v4l2_audio *a)
{
	return a->index ? -EINVAL : 0;
}

static const struct v4l2_file_operations rtrack2_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= video_ioctl2,
};

static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
	.vidioc_querycap    = vidioc_querycap,
	.vidioc_g_tuner     = vidioc_g_tuner,
	.vidioc_s_tuner     = vidioc_s_tuner,
	.vidioc_g_frequency = vidioc_g_frequency,
	.vidioc_s_frequency = vidioc_s_frequency,
	.vidioc_queryctrl   = vidioc_queryctrl,
	.vidioc_g_ctrl      = vidioc_g_ctrl,
	.vidioc_s_ctrl      = vidioc_s_ctrl,
	.vidioc_g_audio     = vidioc_g_audio,
	.vidioc_s_audio     = vidioc_s_audio,
	.vidioc_g_input     = vidioc_g_input,
	.vidioc_s_input     = vidioc_s_input,
};

static int __init rtrack2_init(void)
{
	struct rtrack2 *dev = &rtrack2_card;
	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
	int res;

	strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
	dev->io = io;
	if (dev->io == -1) {
		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
		return -EINVAL;
	}
	if (!request_region(dev->io, 4, "rtrack2")) {
		v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
		return -EBUSY;
	}

	res = v4l2_device_register(NULL, v4l2_dev);
	if (res < 0) {
		release_region(dev->io, 4);
		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
		return res;
	}

	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	dev->vdev.v4l2_dev = v4l2_dev;
	dev->vdev.fops = &rtrack2_fops;
	dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
	dev->vdev.release = video_device_release_empty;
	video_set_drvdata(&dev->vdev, dev);

	mutex_init(&dev->lock);
	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
		v4l2_device_unregister(v4l2_dev);
		release_region(dev->io, 4);
		return -EINVAL;
	}

	v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");

	/* mute card - prevents noisy bootups */
	outb(1, dev->io);
	dev->muted = 1;

	return 0;
}

static void __exit rtrack2_exit(void)
{
	struct rtrack2 *dev = &rtrack2_card;

	video_unregister_device(&dev->vdev);
	v4l2_device_unregister(&dev->v4l2_dev);
	release_region(dev->io, 4);
}

module_init(rtrack2_init);
module_exit(rtrack2_exit);
Commit	Line	Data
1da177e4	1	/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
4286c6f6	2	*
1da177e4	3	* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
d9b01449	4	* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
1da177e4 LT	5	* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
	6	*
	7	* TODO: Allow for more than one of these foolish entities :-)
	8	*
f8c559f8	9	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
1da177e4 LT	10	*/
	11
	12	#include <linux/module.h> /* Modules */
	13	#include <linux/init.h> /* Initdata */
fb911ee8	14	#include <linux/ioport.h> /* request_region */
1da177e4	15	#include <linux/delay.h> /* udelay */
f8c559f8	16	#include <linux/videodev2.h> /* kernel radio structs */
922c78e9 HV	17	#include <linux/mutex.h>
	18	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	19	#include <linux/io.h> /* outb, outb_p */
922c78e9	20	#include <media/v4l2-device.h>
35ea11ff	21	#include <media/v4l2-ioctl.h>
1da177e4	22
922c78e9 HV	23	MODULE_AUTHOR("Ben Pfaff");
	24	MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
	25	MODULE_LICENSE("GPL");
f8c559f8	26
1da177e4 LT	27	#ifndef CONFIG_RADIO_RTRACK2_PORT
	28	#define CONFIG_RADIO_RTRACK2_PORT -1
	29	#endif
	30
4286c6f6	31	static int io = CONFIG_RADIO_RTRACK2_PORT;
1da177e4	32	static int radio_nr = -1;
1da177e4	33
922c78e9 HV	34	module_param(io, int, 0);
	35	MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
	36	module_param(radio_nr, int, 0);
	37
	38	#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
	39
	40	struct rtrack2
1da177e4	41	{
922c78e9 HV	42	struct v4l2_device v4l2_dev;
	43	struct video_device vdev;
	44	int io;
1da177e4 LT	45	unsigned long curfreq;
1da177e4 LT	46	int muted;
922c78e9	47	struct mutex lock;
1da177e4 LT	48	};
1da177e4 LT	49
922c78e9 HV	50	static struct rtrack2 rtrack2_card;
922c78e9 HV	51
1da177e4 LT	52
	53	/* local things */
	54
922c78e9	55	static void rt_mute(struct rtrack2 *dev)
1da177e4	56	{
922c78e9	57	if (dev->muted)
1da177e4	58	return;
922c78e9 HV	59	mutex_lock(&dev->lock);
	60	outb(1, dev->io);
	61	mutex_unlock(&dev->lock);
1da177e4 LT	62	dev->muted = 1;
	63	}
	64
922c78e9	65	static void rt_unmute(struct rtrack2 *dev)
1da177e4 LT	66	{
	67	if(dev->muted == 0)
	68	return;
922c78e9 HV	69	mutex_lock(&dev->lock);
	70	outb(0, dev->io);
	71	mutex_unlock(&dev->lock);
1da177e4 LT	72	dev->muted = 0;
	73	}
	74
922c78e9	75	static void zero(struct rtrack2 *dev)
1da177e4	76	{
922c78e9 HV	77	outb_p(1, dev->io);
	78	outb_p(3, dev->io);
	79	outb_p(1, dev->io);
1da177e4 LT	80	}
1da177e4 LT	81
922c78e9	82	static void one(struct rtrack2 *dev)
1da177e4	83	{
922c78e9 HV	84	outb_p(5, dev->io);
	85	outb_p(7, dev->io);
	86	outb_p(5, dev->io);
1da177e4 LT	87	}
1da177e4 LT	88
922c78e9	89	static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
1da177e4 LT	90	{
	91	int i;
	92
922c78e9 HV	93	mutex_lock(&dev->lock);
922c78e9 HV	94	dev->curfreq = freq;
1da177e4	95	freq = freq / 200 + 856;
4286c6f6	96
922c78e9 HV	97	outb_p(0xc8, dev->io);
	98	outb_p(0xc9, dev->io);
	99	outb_p(0xc9, dev->io);
1da177e4 LT	100
1da177e4 LT	101	for (i = 0; i < 10; i++)
922c78e9	102	zero(dev);
1da177e4 LT	103
	104	for (i = 14; i >= 0; i--)
	105	if (freq & (1 << i))
922c78e9	106	one(dev);
1da177e4	107	else
922c78e9	108	zero(dev);
1da177e4	109
922c78e9	110	outb_p(0xc8, dev->io);
1da177e4	111	if (!dev->muted)
922c78e9	112	outb_p(0, dev->io);
4286c6f6	113
922c78e9	114	mutex_unlock(&dev->lock);
1da177e4 LT	115	return 0;
	116	}
	117
25f30389 DL	118	static int vidioc_querycap(struct file file, void priv,
	119	struct v4l2_capability *v)
	120	{
	121	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
	122	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
922c78e9	123	strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
25f30389	124	v->version = RADIO_VERSION;
922c78e9	125	v->capabilities = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
25f30389 DL	126	return 0;
	127	}
	128
	129	static int vidioc_s_tuner(struct file file, void priv,
	130	struct v4l2_tuner *v)
	131	{
922c78e9	132	return v->index ? -EINVAL : 0;
25f30389 DL	133	}
25f30389 DL	134
922c78e9	135	static int rt_getsigstr(struct rtrack2 *dev)
1da177e4	136	{
922c78e9 HV	137	int sig = 1;
	138
	139	mutex_lock(&dev->lock);
	140	if (inb(dev->io) & 2) /* bit set = no signal present */
	141	sig = 0;
	142	mutex_unlock(&dev->lock);
	143	return sig;
1da177e4 LT	144	}
1da177e4 LT	145
25f30389 DL	146	static int vidioc_g_tuner(struct file file, void priv,
25f30389 DL	147	struct v4l2_tuner *v)
1da177e4	148	{
922c78e9	149	struct rtrack2 *rt = video_drvdata(file);
25f30389 DL	150
	151	if (v->index > 0)
	152	return -EINVAL;
	153
922c78e9	154	strlcpy(v->name, "FM", sizeof(v->name));
25f30389	155	v->type = V4L2_TUNER_RADIO;
922c78e9 HV	156	v->rangelow = 88 * 16000;
922c78e9 HV	157	v->rangehigh = 108 * 16000;
25f30389 DL	158	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	159	v->capability = V4L2_TUNER_CAP_LOW;
	160	v->audmode = V4L2_TUNER_MODE_MONO;
922c78e9	161	v->signal = 0xFFFF * rt_getsigstr(rt);
25f30389 DL	162	return 0;
25f30389 DL	163	}
f8c559f8	164
25f30389 DL	165	static int vidioc_s_frequency(struct file file, void priv,
	166	struct v4l2_frequency *f)
	167	{
922c78e9	168	struct rtrack2 *rt = video_drvdata(file);
f8c559f8	169
922c78e9	170	rt_setfreq(rt, f->frequency);
25f30389 DL	171	return 0;
25f30389 DL	172	}
f8c559f8	173
25f30389 DL	174	static int vidioc_g_frequency(struct file file, void priv,
	175	struct v4l2_frequency *f)
	176	{
922c78e9	177	struct rtrack2 *rt = video_drvdata(file);
f8c559f8	178
25f30389 DL	179	f->type = V4L2_TUNER_RADIO;
	180	f->frequency = rt->curfreq;
	181	return 0;
	182	}
f8c559f8	183
25f30389 DL	184	static int vidioc_queryctrl(struct file file, void priv,
	185	struct v4l2_queryctrl *qc)
	186	{
922c78e9 HV	187	switch (qc->id) {
	188	case V4L2_CID_AUDIO_MUTE:
	189	return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
	190	case V4L2_CID_AUDIO_VOLUME:
	191	return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
25f30389 DL	192	}
	193	return -EINVAL;
	194	}
f8c559f8	195
25f30389 DL	196	static int vidioc_g_ctrl(struct file file, void priv,
	197	struct v4l2_control *ctrl)
	198	{
922c78e9	199	struct rtrack2 *rt = video_drvdata(file);
f8c559f8	200
25f30389 DL	201	switch (ctrl->id) {
	202	case V4L2_CID_AUDIO_MUTE:
	203	ctrl->value = rt->muted;
	204	return 0;
	205	case V4L2_CID_AUDIO_VOLUME:
	206	if (rt->muted)
	207	ctrl->value = 0;
	208	else
	209	ctrl->value = 65535;
	210	return 0;
1da177e4	211	}
25f30389	212	return -EINVAL;
1da177e4 LT	213	}
1da177e4 LT	214
25f30389 DL	215	static int vidioc_s_ctrl(struct file file, void priv,
25f30389 DL	216	struct v4l2_control *ctrl)
1da177e4	217	{
922c78e9	218	struct rtrack2 *rt = video_drvdata(file);
25f30389 DL	219
	220	switch (ctrl->id) {
	221	case V4L2_CID_AUDIO_MUTE:
	222	if (ctrl->value)
	223	rt_mute(rt);
	224	else
	225	rt_unmute(rt);
	226	return 0;
	227	case V4L2_CID_AUDIO_VOLUME:
	228	if (ctrl->value)
	229	rt_unmute(rt);
	230	else
	231	rt_mute(rt);
	232	return 0;
	233	}
	234	return -EINVAL;
1da177e4 LT	235	}
1da177e4 LT	236
8b811cf0 DL	237	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	238	{
	239	*i = 0;
	240	return 0;
	241	}
	242
	243	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
	244	{
922c78e9	245	return i ? -EINVAL : 0;
8b811cf0 DL	246	}
8b811cf0 DL	247
922c78e9	248	static int vidioc_g_audio(struct file file, void priv,
8b811cf0 DL	249	struct v4l2_audio *a)
8b811cf0 DL	250	{
922c78e9 HV	251	a->index = 0;
	252	strlcpy(a->name, "Radio", sizeof(a->name));
	253	a->capability = V4L2_AUDCAP_STEREO;
8b811cf0 DL	254	return 0;
	255	}
	256
922c78e9 HV	257	static int vidioc_s_audio(struct file file, void priv,
	258	struct v4l2_audio *a)
	259	{
	260	return a->index ? -EINVAL : 0;
	261	}
1da177e4	262
bec43661	263	static const struct v4l2_file_operations rtrack2_fops = {
1da177e4	264	.owner = THIS_MODULE,
25f30389	265	.ioctl = video_ioctl2,
1da177e4 LT	266	};
1da177e4 LT	267
a399810c	268	static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
25f30389 DL	269	.vidioc_querycap = vidioc_querycap,
	270	.vidioc_g_tuner = vidioc_g_tuner,
	271	.vidioc_s_tuner = vidioc_s_tuner,
	272	.vidioc_g_frequency = vidioc_g_frequency,
	273	.vidioc_s_frequency = vidioc_s_frequency,
	274	.vidioc_queryctrl = vidioc_queryctrl,
	275	.vidioc_g_ctrl = vidioc_g_ctrl,
	276	.vidioc_s_ctrl = vidioc_s_ctrl,
8b811cf0 DL	277	.vidioc_g_audio = vidioc_g_audio,
	278	.vidioc_s_audio = vidioc_s_audio,
	279	.vidioc_g_input = vidioc_g_input,
	280	.vidioc_s_input = vidioc_s_input,
1da177e4 LT	281	};
	282
	283	static int __init rtrack2_init(void)
	284	{
922c78e9 HV	285	struct rtrack2 *dev = &rtrack2_card;
	286	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
	287	int res;
	288
	289	strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
	290	dev->io = io;
	291	if (dev->io == -1) {
	292	v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
1da177e4 LT	293	return -EINVAL;
1da177e4 LT	294	}
922c78e9 HV	295	if (!request_region(dev->io, 4, "rtrack2")) {
922c78e9 HV	296	v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
1da177e4 LT	297	return -EBUSY;
	298	}
	299
922c78e9 HV	300	res = v4l2_device_register(NULL, v4l2_dev);
	301	if (res < 0) {
	302	release_region(dev->io, 4);
	303	v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
	304	return res;
	305	}
1da177e4	306
922c78e9 HV	307	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	308	dev->vdev.v4l2_dev = v4l2_dev;
	309	dev->vdev.fops = &rtrack2_fops;
	310	dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
	311	dev->vdev.release = video_device_release_empty;
	312	video_set_drvdata(&dev->vdev, dev);
	313
	314	mutex_init(&dev->lock);
	315	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
	316	v4l2_device_unregister(v4l2_dev);
	317	release_region(dev->io, 4);
1da177e4 LT	318	return -EINVAL;
1da177e4 LT	319	}
4286c6f6	320
922c78e9	321	v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");
1da177e4	322
4286c6f6	323	/* mute card - prevents noisy bootups */
922c78e9 HV	324	outb(1, dev->io);
922c78e9 HV	325	dev->muted = 1;
1da177e4 LT	326
	327	return 0;
	328	}
	329
922c78e9	330	static void __exit rtrack2_exit(void)
1da177e4	331	{
922c78e9 HV	332	struct rtrack2 *dev = &rtrack2_card;
	333
	334	video_unregister_device(&dev->vdev);
	335	v4l2_device_unregister(&dev->v4l2_dev);
	336	release_region(dev->io, 4);
1da177e4 LT	337	}
	338
	339	module_init(rtrack2_init);
922c78e9	340	module_exit(rtrack2_exit);