linux/drivers/media/radio/radio-terratec.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

343 lines
7.5 KiB
C

/* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
* (c) 1999 R. Offermanns (rolf@offermanns.de)
* based on the aimslab radio driver from M. Kirkwood
* many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
*
*
* History:
* 1999-05-21 First preview release
*
* Notes on the hardware:
* There are two "main" chips on the card:
* - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
* - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
* (you can get the datasheet at the above links)
*
* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
* Volume Control is done digitally
*
* there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday
* (as soon i have understand how to get started :)
* If you can help me out with that, please contact me!!
*
*
*/
#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_TERRATEC_PORT */
#include <linux/spinlock.h>
#ifndef CONFIG_RADIO_TERRATEC_PORT
#define CONFIG_RADIO_TERRATEC_PORT 0x590
#endif
/**************** this ones are for the terratec *******************/
#define BASEPORT 0x590
#define VOLPORT 0x591
#define WRT_DIS 0x00
#define CLK_OFF 0x00
#define IIC_DATA 0x01
#define IIC_CLK 0x02
#define DATA 0x04
#define CLK_ON 0x08
#define WRT_EN 0x10
/*******************************************************************/
static int io = CONFIG_RADIO_TERRATEC_PORT;
static int radio_nr = -1;
static spinlock_t lock;
struct tt_device
{
int port;
int curvol;
unsigned long curfreq;
int muted;
};
/* local things */
static void cardWriteVol(int volume)
{
int i;
volume = volume+(volume * 32); // change both channels
spin_lock(&lock);
for (i=0;i<8;i++)
{
if (volume & (0x80>>i))
outb(0x80, VOLPORT);
else outb(0x00, VOLPORT);
}
spin_unlock(&lock);
}
static void tt_mute(struct tt_device *dev)
{
dev->muted = 1;
cardWriteVol(0);
}
static int tt_setvol(struct tt_device *dev, int vol)
{
// printk(KERN_ERR "setvol called, vol = %d\n", vol);
if(vol == dev->curvol) { /* requested volume = current */
if (dev->muted) { /* user is unmuting the card */
dev->muted = 0;
cardWriteVol(vol); /* enable card */
}
return 0;
}
if(vol == 0) { /* volume = 0 means mute the card */
cardWriteVol(0); /* "turn off card" by setting vol to 0 */
dev->curvol = vol; /* track the volume state! */
return 0;
}
dev->muted = 0;
cardWriteVol(vol);
dev->curvol = vol;
return 0;
}
/* this is the worst part in this driver */
/* many more or less strange things are going on here, but hey, it works :) */
static int tt_setfreq(struct tt_device *dev, unsigned long freq1)
{
int freq;
int i;
int p;
int temp;
long rest;
unsigned char buffer[25]; /* we have to bit shift 25 registers */
freq = freq1/160; /* convert the freq. to a nice to handle value */
for(i=24;i>-1;i--)
buffer[i]=0;
rest = freq*10+10700; /* i once had understood what is going on here */
/* maybe some wise guy (friedhelm?) can comment this stuff */
i=13;
p=10;
temp=102400;
while (rest!=0)
{
if (rest%temp == rest)
buffer[i] = 0;
else
{
buffer[i] = 1;
rest = rest-temp;
}
i--;
p--;
temp = temp/2;
}
spin_lock(&lock);
for (i=24;i>-1;i--) /* bit shift the values to the radiocard */
{
if (buffer[i]==1)
{
outb(WRT_EN|DATA, BASEPORT);
outb(WRT_EN|DATA|CLK_ON , BASEPORT);
outb(WRT_EN|DATA, BASEPORT);
}
else
{
outb(WRT_EN|0x00, BASEPORT);
outb(WRT_EN|0x00|CLK_ON , BASEPORT);
}
}
outb(0x00, BASEPORT);
spin_unlock(&lock);
return 0;
}
static int tt_getsigstr(struct tt_device *dev) /* TODO */
{
if (inb(io) & 2) /* bit set = no signal present */
return 0;
return 1; /* signal present */
}
/* implement the video4linux api */
static int tt_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *dev = video_devdata(file);
struct tt_device *tt=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, "ActiveRadio");
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;
strcpy(v->name, "FM");
v->signal=0xFFFF*tt_getsigstr(tt);
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 = tt->curfreq;
return 0;
}
case VIDIOCSFREQ:
{
unsigned long *freq = arg;
tt->curfreq = *freq;
tt_setfreq(tt, tt->curfreq);
return 0;
}
case VIDIOCGAUDIO:
{
struct video_audio *v = arg;
memset(v,0, sizeof(*v));
v->flags|=VIDEO_AUDIO_MUTABLE|VIDEO_AUDIO_VOLUME;
v->volume=tt->curvol * 6554;
v->step=6554;
strcpy(v->name, "Radio");
return 0;
}
case VIDIOCSAUDIO:
{
struct video_audio *v = arg;
if(v->audio)
return -EINVAL;
if(v->flags&VIDEO_AUDIO_MUTE)
tt_mute(tt);
else
tt_setvol(tt,v->volume/6554);
return 0;
}
default:
return -ENOIOCTLCMD;
}
}
static int tt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(inode, file, cmd, arg, tt_do_ioctl);
}
static struct tt_device terratec_unit;
static struct file_operations terratec_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = tt_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device terratec_radio=
{
.owner = THIS_MODULE,
.name = "TerraTec ActiveRadio",
.type = VID_TYPE_TUNER,
.hardware = VID_HARDWARE_TERRATEC,
.fops = &terratec_fops,
};
static int __init terratec_init(void)
{
if(io==-1)
{
printk(KERN_ERR "You must set an I/O address with io=0x???\n");
return -EINVAL;
}
if (!request_region(io, 2, "terratec"))
{
printk(KERN_ERR "TerraTec: port 0x%x already in use\n", io);
return -EBUSY;
}
terratec_radio.priv=&terratec_unit;
spin_lock_init(&lock);
if(video_register_device(&terratec_radio, VFL_TYPE_RADIO, radio_nr)==-1)
{
release_region(io,2);
return -EINVAL;
}
printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver.\n");
/* mute card - prevents noisy bootups */
/* this ensures that the volume is all the way down */
cardWriteVol(0);
terratec_unit.curvol = 0;
return 0;
}
MODULE_AUTHOR("R.OFFERMANNS & others");
MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
MODULE_LICENSE("GPL");
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
module_param(radio_nr, int, 0);
static void __exit terratec_cleanup_module(void)
{
video_unregister_device(&terratec_radio);
release_region(io,2);
printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver unloaded.\n");
}
module_init(terratec_init);
module_exit(terratec_cleanup_module);