[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.Cox@linux.org>
 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
 *
 * TODO: Allow for more than one of these foolish entities :-)
 *
 */

#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_RTRACK2_PORT 	*/
#include <linux/spinlock.h>

#ifndef CONFIG_RADIO_RTRACK2_PORT
#define CONFIG_RADIO_RTRACK2_PORT -1
#endif

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

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


/* local things */

static void rt_mute(struct rt_device *dev)
{
	if(dev->muted)
		return;
	spin_lock(&lock);
	outb(1, io);
	spin_unlock(&lock);
	dev->muted = 1;
}

static void rt_unmute(struct rt_device *dev)
{
	if(dev->muted == 0)
		return;
	spin_lock(&lock);
	outb(0, io);
	spin_unlock(&lock);
	dev->muted = 0;
}

static void zero(void)
{
	outb_p(1, io);
	outb_p(3, io);
	outb_p(1, io);
}

static void one(void)
{
	outb_p(5, io);
	outb_p(7, io);
	outb_p(5, io);
}

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

	freq = freq / 200 + 856;

	spin_lock(&lock);

	outb_p(0xc8, io);
	outb_p(0xc9, io);
	outb_p(0xc9, io);

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

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

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

	spin_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 II");
			return 0;
		}
		case VIDIOCGTUNER:
		{
			struct video_tuner *v = arg;
			if(v->tuner)	/* Only 1 tuner */
				return -EINVAL;
			v->rangelow=88*16000;
			v->rangehigh=108*16000;
			v->flags=VIDEO_TUNER_LOW;
			v->mode=VIDEO_MODE_AUTO;
			v->signal=0xFFFF*rt_getsigstr(rt);
			strcpy(v->name, "FM");
			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;
			v->volume=1;
			v->step=65535;
			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_unmute(rt);

			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 rtrack2_unit;

static struct file_operations rtrack2_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 rtrack2_radio=
{
	.owner		= THIS_MODULE,
	.name		= "RadioTrack II radio",
	.type		= VID_TYPE_TUNER,
	.hardware	= VID_HARDWARE_RTRACK2,
	.fops           = &rtrack2_fops,
};

static int __init rtrack2_init(void)
{
	if(io==-1)
	{
		printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
		return -EINVAL;
	}
	if (!request_region(io, 4, "rtrack2"))
	{
		printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
		return -EBUSY;
	}

	rtrack2_radio.priv=&rtrack2_unit;

	spin_lock_init(&lock);
	if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
	{
		release_region(io, 4);
		return -EINVAL;
	}

	printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");

	/* mute card - prevents noisy bootups */
	outb(1, io);
	rtrack2_unit.muted = 1;

	return 0;
}

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

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);

static void __exit rtrack2_cleanup_module(void)
{
	video_unregister_device(&rtrack2_radio);
	release_region(io,4);
}

module_init(rtrack2_init);
module_exit(rtrack2_cleanup_module);

/*
  Local variables:
  compile-command: "mmake"
  End:
*/
Commit	Line	Data
1da177e4	1	/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
4286c6f6	2	*
1da177e4 LT	3	* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
	4	* Converted to new API by Alan Cox <Alan.Cox@linux.org>
	5	* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
	6	*
	7	* TODO: Allow for more than one of these foolish entities :-)
	8	*
	9	*/
	10
	11	#include <linux/module.h> /* Modules */
	12	#include <linux/init.h> /* Initdata */
fb911ee8	13	#include <linux/ioport.h> /* request_region */
1da177e4 LT	14	#include <linux/delay.h> /* udelay */
	15	#include <asm/io.h> /* outb, outb_p */
	16	#include <asm/uaccess.h> /* copy to/from user */
	17	#include <linux/videodev.h> /* kernel radio structs */
5e87efa3	18	#include <media/v4l2-common.h>
1da177e4 LT	19	#include <linux/config.h> /* CONFIG_RADIO_RTRACK2_PORT */
	20	#include <linux/spinlock.h>
	21
	22	#ifndef CONFIG_RADIO_RTRACK2_PORT
	23	#define CONFIG_RADIO_RTRACK2_PORT -1
	24	#endif
	25
4286c6f6	26	static int io = CONFIG_RADIO_RTRACK2_PORT;
1da177e4 LT	27	static int radio_nr = -1;
	28	static spinlock_t lock;
	29
	30	struct rt_device
	31	{
	32	int port;
	33	unsigned long curfreq;
	34	int muted;
	35	};
	36
	37
	38	/* local things */
	39
	40	static void rt_mute(struct rt_device *dev)
	41	{
4286c6f6	42	if(dev->muted)
1da177e4 LT	43	return;
	44	spin_lock(&lock);
	45	outb(1, io);
	46	spin_unlock(&lock);
	47	dev->muted = 1;
	48	}
	49
	50	static void rt_unmute(struct rt_device *dev)
	51	{
	52	if(dev->muted == 0)
	53	return;
	54	spin_lock(&lock);
	55	outb(0, io);
	56	spin_unlock(&lock);
	57	dev->muted = 0;
	58	}
	59
	60	static void zero(void)
	61	{
4286c6f6	62	outb_p(1, io);
1da177e4 LT	63	outb_p(3, io);
	64	outb_p(1, io);
	65	}
	66
	67	static void one(void)
	68	{
4286c6f6	69	outb_p(5, io);
1da177e4 LT	70	outb_p(7, io);
	71	outb_p(5, io);
	72	}
	73
	74	static int rt_setfreq(struct rt_device *dev, unsigned long freq)
	75	{
	76	int i;
	77
	78	freq = freq / 200 + 856;
4286c6f6	79
1da177e4 LT	80	spin_lock(&lock);
	81
	82	outb_p(0xc8, io);
	83	outb_p(0xc9, io);
	84	outb_p(0xc9, io);
	85
	86	for (i = 0; i < 10; i++)
	87	zero ();
	88
	89	for (i = 14; i >= 0; i--)
	90	if (freq & (1 << i))
	91	one ();
	92	else
	93	zero ();
	94
	95	outb_p(0xc8, io);
	96	if (!dev->muted)
	97	outb_p(0, io);
4286c6f6	98
1da177e4 LT	99	spin_unlock(&lock);
	100	return 0;
	101	}
	102
	103	static int rt_getsigstr(struct rt_device *dev)
	104	{
	105	if (inb(io) & 2) /* bit set = no signal present */
	106	return 0;
	107	return 1; /* signal present */
	108	}
	109
	110	static int rt_do_ioctl(struct inode inode, struct file file,
	111	unsigned int cmd, void *arg)
	112	{
	113	struct video_device *dev = video_devdata(file);
	114	struct rt_device *rt=dev->priv;
	115
	116	switch(cmd)
	117	{
	118	case VIDIOCGCAP:
	119	{
	120	struct video_capability *v = arg;
	121	memset(v,0,sizeof(*v));
	122	v->type=VID_TYPE_TUNER;
	123	v->channels=1;
	124	v->audios=1;
	125	strcpy(v->name, "RadioTrack II");
	126	return 0;
	127	}
	128	case VIDIOCGTUNER:
	129	{
	130	struct video_tuner *v = arg;
4286c6f6	131	if(v->tuner) /* Only 1 tuner */
1da177e4 LT	132	return -EINVAL;
	133	v->rangelow=88*16000;
	134	v->rangehigh=108*16000;
	135	v->flags=VIDEO_TUNER_LOW;
	136	v->mode=VIDEO_MODE_AUTO;
	137	v->signal=0xFFFF*rt_getsigstr(rt);
	138	strcpy(v->name, "FM");
	139	return 0;
	140	}
	141	case VIDIOCSTUNER:
	142	{
	143	struct video_tuner *v = arg;
	144	if(v->tuner!=0)
	145	return -EINVAL;
	146	/* Only 1 tuner so no setting needed ! */
	147	return 0;
	148	}
	149	case VIDIOCGFREQ:
	150	{
	151	unsigned long *freq = arg;
	152	*freq = rt->curfreq;
	153	return 0;
	154	}
	155	case VIDIOCSFREQ:
	156	{
	157	unsigned long *freq = arg;
	158	rt->curfreq = *freq;
	159	rt_setfreq(rt, rt->curfreq);
	160	return 0;
	161	}
	162	case VIDIOCGAUDIO:
4286c6f6	163	{
1da177e4 LT	164	struct video_audio *v = arg;
	165	memset(v,0, sizeof(*v));
	166	v->flags\|=VIDEO_AUDIO_MUTABLE;
	167	v->volume=1;
	168	v->step=65535;
	169	strcpy(v->name, "Radio");
4286c6f6	170	return 0;
1da177e4 LT	171	}
	172	case VIDIOCSAUDIO:
	173	{
	174	struct video_audio *v = arg;
4286c6f6	175	if(v->audio)
1da177e4 LT	176	return -EINVAL;
1da177e4 LT	177
4286c6f6	178	if(v->flags&VIDEO_AUDIO_MUTE)
1da177e4 LT	179	rt_mute(rt);
1da177e4 LT	180	else
4286c6f6	181	rt_unmute(rt);
1da177e4 LT	182
	183	return 0;
	184	}
	185	default:
	186	return -ENOIOCTLCMD;
	187	}
	188	}
	189
	190	static int rt_ioctl(struct inode inode, struct file file,
	191	unsigned int cmd, unsigned long arg)
	192	{
	193	return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
	194	}
	195
	196	static struct rt_device rtrack2_unit;
	197
	198	static struct file_operations rtrack2_fops = {
	199	.owner = THIS_MODULE,
	200	.open = video_exclusive_open,
	201	.release = video_exclusive_release,
	202	.ioctl = rt_ioctl,
0d0fbf81	203	.compat_ioctl = v4l_compat_ioctl32,
1da177e4 LT	204	.llseek = no_llseek,
	205	};
	206
	207	static struct video_device rtrack2_radio=
	208	{
	209	.owner = THIS_MODULE,
	210	.name = "RadioTrack II radio",
	211	.type = VID_TYPE_TUNER,
	212	.hardware = VID_HARDWARE_RTRACK2,
	213	.fops = &rtrack2_fops,
	214	};
	215
	216	static int __init rtrack2_init(void)
	217	{
	218	if(io==-1)
	219	{
	220	printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
	221	return -EINVAL;
	222	}
4286c6f6	223	if (!request_region(io, 4, "rtrack2"))
1da177e4 LT	224	{
	225	printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
	226	return -EBUSY;
	227	}
	228
	229	rtrack2_radio.priv=&rtrack2_unit;
	230
4286c6f6	231	spin_lock_init(&lock);
1da177e4 LT	232	if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
	233	{
	234	release_region(io, 4);
	235	return -EINVAL;
	236	}
4286c6f6	237
1da177e4 LT	238	printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
1da177e4 LT	239
4286c6f6	240	/* mute card - prevents noisy bootups */
1da177e4 LT	241	outb(1, io);
	242	rtrack2_unit.muted = 1;
	243
	244	return 0;
	245	}
	246
	247	MODULE_AUTHOR("Ben Pfaff");
	248	MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
	249	MODULE_LICENSE("GPL");
	250
	251	module_param(io, int, 0);
	252	MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
	253	module_param(radio_nr, int, 0);
	254
	255	static void __exit rtrack2_cleanup_module(void)
	256	{
	257	video_unregister_device(&rtrack2_radio);
	258	release_region(io,4);
	259	}
	260
	261	module_init(rtrack2_init);
	262	module_exit(rtrack2_cleanup_module);
	263
	264	/*
	265	Local variables:
	266	compile-command: "mmake"
	267	End:
	268	*/