5e87efa3b2
The videodev.h and videodev2.h describe the public API for V4L and V4L2. It shouldn't have there any kernel-specific stuff. Those were moved to v4l2-dev.h. This patch removes some uneeded headers and include v4l2-common.h on all V4L driver. This header includes device implementation of V4L2 API provided on v4l2-dev.h as well as V4L2 internal ioctls that provides connections between master driver and its i2c devices. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
306 lines
6.4 KiB
C
306 lines
6.4 KiB
C
/* 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 <media/v4l2-common.h>
|
|
#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:
|
|
*/
|