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linux/drivers/media/radio/radio-gemtek.c
Arnd Bergmann 0d0fbf8152 V4L (926_2): Moves compat32 functions from fs to v4l subsystem 
This moves the 32 bit ioctl compatibility handlers for
Video4Linux into a new file and adds explicit calls to them
to each v4l device driver.

Unfortunately, there does not seem to be any code handling
the v4l2 ioctls, so quite often the code goes through two
separate conversions, first from 32 bit v4l to 64 bit v4l,
and from there to 64 bit v4l2. My patch does not change
that, so there is still much room for improvement.

Also, some drivers have additional ioctl numbers, for
which the conversion should be handled internally to
that driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
2006-01-09 15:24:57 -02:00

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6.4 KiB
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/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
*
* GemTek hasn't released any specs on the card, so the protocol had to
* be reverse engineered with dosemu.
*
* Besides the protocol changes, this is mostly a copy of:
*
* 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 <linux/config.h> /* CONFIG_RADIO_GEMTEK_PORT */
#include <linux/spinlock.h>
#ifndef CONFIG_RADIO_GEMTEK_PORT
#define CONFIG_RADIO_GEMTEK_PORT -1
#endif
static int io = CONFIG_RADIO_GEMTEK_PORT;
static int radio_nr = -1;
static spinlock_t lock;
struct gemtek_device
{
int port;
unsigned long curfreq;
int muted;
};
/* local things */
/* the correct way to mute the gemtek may be to write the last written
* frequency || 0x10, but just writing 0x10 once seems to do it as well
*/
static void gemtek_mute(struct gemtek_device *dev)
{
if(dev->muted)
return;
spin_lock(&lock);
outb(0x10, io);
spin_unlock(&lock);
dev->muted = 1;
}
static void gemtek_unmute(struct gemtek_device *dev)
{
if(dev->muted == 0)
return;
spin_lock(&lock);
outb(0x20, io);
spin_unlock(&lock);
dev->muted = 0;
}
static void zero(void)
{
outb_p(0x04, io);
udelay(5);
outb_p(0x05, io);
udelay(5);
}
static void one(void)
{
outb_p(0x06, io);
udelay(5);
outb_p(0x07, io);
udelay(5);
}
static int gemtek_setfreq(struct gemtek_device *dev, unsigned long freq)
{
int i;
/* freq = 78.25*((float)freq/16000.0 + 10.52); */
freq /= 16;
freq += 10520;
freq *= 7825;
freq /= 100000;
spin_lock(&lock);
/* 2 start bits */
outb_p(0x03, io);
udelay(5);
outb_p(0x07, io);
udelay(5);
/* 28 frequency bits (lsb first) */
for (i = 0; i < 14; i++)
if (freq & (1 << i))
one();
else
zero();
/* 36 unknown bits */
for (i = 0; i < 11; i++)
zero();
one();
for (i = 0; i < 4; i++)
zero();
one();
zero();
/* 2 end bits */
outb_p(0x03, io);
udelay(5);
outb_p(0x07, io);
udelay(5);
spin_unlock(&lock);
return 0;
}
static int gemtek_getsigstr(struct gemtek_device *dev)
{
spin_lock(&lock);
inb(io);
udelay(5);
spin_unlock(&lock);
if (inb(io) & 8) /* bit set = no signal present */
return 0;
return 1; /* signal present */
}
static int gemtek_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *dev = video_devdata(file);
struct gemtek_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, "GemTek");
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;
v->signal=0xFFFF*gemtek_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;
/* needs to be called twice in order for getsigstr to work */
gemtek_setfreq(rt, rt->curfreq);
gemtek_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)
gemtek_mute(rt);
else
gemtek_unmute(rt);
return 0;
}
default:
return -ENOIOCTLCMD;
}
}
static int gemtek_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(inode, file, cmd, arg, gemtek_do_ioctl);
}
static struct gemtek_device gemtek_unit;
static struct file_operations gemtek_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = gemtek_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device gemtek_radio=
{
.owner = THIS_MODULE,
.name = "GemTek radio",
.type = VID_TYPE_TUNER,
.hardware = VID_HARDWARE_GEMTEK,
.fops = &gemtek_fops,
};
static int __init gemtek_init(void)
{
if(io==-1)
{
printk(KERN_ERR "You must set an I/O address with io=0x20c, io=0x30c, io=0x24c or io=0x34c (io=0x020c or io=0x248 for the combined sound/radiocard)\n");
return -EINVAL;
}
if (!request_region(io, 4, "gemtek"))
{
printk(KERN_ERR "gemtek: port 0x%x already in use\n", io);
return -EBUSY;
}
gemtek_radio.priv=&gemtek_unit;
if(video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr)==-1)
{
release_region(io, 4);
return -EINVAL;
}
printk(KERN_INFO "GemTek Radio Card driver.\n");
spin_lock_init(&lock);
/* this is _maybe_ unnecessary */
outb(0x01, io);
/* mute card - prevents noisy bootups */
gemtek_unit.muted = 0;
gemtek_mute(&gemtek_unit);
return 0;
}
MODULE_AUTHOR("Jonas Munsin");
MODULE_DESCRIPTION("A driver for the GemTek Radio Card");
MODULE_LICENSE("GPL");
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the GemTek card (0x20c, 0x30c, 0x24c or 0x34c (0x20c or 0x248 have been reported to work for the combined sound/radiocard)).");
module_param(radio_nr, int, 0);
static void __exit gemtek_cleanup(void)
{
video_unregister_device(&gemtek_radio);
release_region(io,4);
}
module_init(gemtek_init);
module_exit(gemtek_cleanup);
/*
Local variables:
compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c"
End:
*/
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