You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
373 lines
7.8 KiB
373 lines
7.8 KiB
/* 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 :-)
|
|
*
|
|
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
|
|
*/
|
|
|
|
#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/videodev2.h> /* kernel radio structs */
|
|
#include <media/v4l2-common.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
|
|
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
|
|
|
|
static struct v4l2_queryctrl radio_qctrl[] = {
|
|
{
|
|
.id = V4L2_CID_AUDIO_MUTE,
|
|
.name = "Mute",
|
|
.minimum = 0,
|
|
.maximum = 1,
|
|
.default_value = 1,
|
|
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
|
},{
|
|
.id = V4L2_CID_AUDIO_VOLUME,
|
|
.name = "Volume",
|
|
.minimum = 0,
|
|
.maximum = 65535,
|
|
.step = 65535,
|
|
.default_value = 0xff,
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
}
|
|
};
|
|
|
|
#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 VIDIOC_QUERYCAP:
|
|
{
|
|
struct v4l2_capability *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
strlcpy(v->driver, "radio-gemtek", sizeof (v->driver));
|
|
strlcpy(v->card, "GemTek", sizeof (v->card));
|
|
sprintf(v->bus_info,"ISA");
|
|
v->version = RADIO_VERSION;
|
|
v->capabilities = V4L2_CAP_TUNER;
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_G_TUNER:
|
|
{
|
|
struct v4l2_tuner *v = arg;
|
|
|
|
if (v->index > 0)
|
|
return -EINVAL;
|
|
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "FM");
|
|
v->type = V4L2_TUNER_RADIO;
|
|
|
|
v->rangelow=(87*16000);
|
|
v->rangehigh=(108*16000);
|
|
v->rxsubchans =V4L2_TUNER_SUB_MONO;
|
|
v->capability=V4L2_TUNER_CAP_LOW;
|
|
v->audmode = V4L2_TUNER_MODE_MONO;
|
|
v->signal=0xFFFF*gemtek_getsigstr(rt);
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_S_TUNER:
|
|
{
|
|
struct v4l2_tuner *v = arg;
|
|
|
|
if (v->index > 0)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_S_FREQUENCY:
|
|
{
|
|
struct v4l2_frequency *f = arg;
|
|
|
|
rt->curfreq = f->frequency;
|
|
/* needs to be called twice in order for getsigstr to work */
|
|
gemtek_setfreq(rt, rt->curfreq);
|
|
gemtek_setfreq(rt, rt->curfreq);
|
|
return 0;
|
|
}
|
|
case VIDIOC_G_FREQUENCY:
|
|
{
|
|
struct v4l2_frequency *f = arg;
|
|
|
|
f->type = V4L2_TUNER_RADIO;
|
|
f->frequency = rt->curfreq;
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_QUERYCTRL:
|
|
{
|
|
struct v4l2_queryctrl *qc = arg;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
|
|
if (qc->id && qc->id == radio_qctrl[i].id) {
|
|
memcpy(qc, &(radio_qctrl[i]),
|
|
sizeof(*qc));
|
|
return (0);
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
case VIDIOC_G_CTRL:
|
|
{
|
|
struct v4l2_control *ctrl= arg;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
ctrl->value=rt->muted;
|
|
return (0);
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
if (rt->muted)
|
|
ctrl->value=0;
|
|
else
|
|
ctrl->value=65535;
|
|
return (0);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
case VIDIOC_S_CTRL:
|
|
{
|
|
struct v4l2_control *ctrl= arg;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
if (ctrl->value) {
|
|
gemtek_mute(rt);
|
|
} else {
|
|
gemtek_unmute(rt);
|
|
}
|
|
return (0);
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
if (ctrl->value) {
|
|
gemtek_unmute(rt);
|
|
} else {
|
|
gemtek_mute(rt);
|
|
}
|
|
return (0);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
default:
|
|
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
|
|
gemtek_do_ioctl);
|
|
}
|
|
}
|
|
|
|
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 = 0,
|
|
.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:
|
|
*/
|
|
|