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