419 строки
9.9 KiB
C
419 строки
9.9 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!!
|
|
*
|
|
*
|
|
* 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/videodev2.h> /* kernel radio structs */
|
|
#include <linux/mutex.h>
|
|
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
|
|
#include <linux/io.h> /* outb, outb_p */
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
|
|
MODULE_AUTHOR("R.OFFERMANNS & others");
|
|
MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifndef CONFIG_RADIO_TERRATEC_PORT
|
|
#define CONFIG_RADIO_TERRATEC_PORT 0x590
|
|
#endif
|
|
|
|
static int io = CONFIG_RADIO_TERRATEC_PORT;
|
|
static int radio_nr = -1;
|
|
|
|
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);
|
|
|
|
#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 = 0xff,
|
|
.step = 1,
|
|
.default_value = 0xff,
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
}
|
|
};
|
|
|
|
#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
|
|
|
|
struct terratec
|
|
{
|
|
struct v4l2_device v4l2_dev;
|
|
struct video_device vdev;
|
|
int io;
|
|
int curvol;
|
|
unsigned long curfreq;
|
|
int muted;
|
|
struct mutex lock;
|
|
};
|
|
|
|
static struct terratec terratec_card;
|
|
|
|
/* local things */
|
|
|
|
static void tt_write_vol(struct terratec *tt, int volume)
|
|
{
|
|
int i;
|
|
|
|
volume = volume + (volume * 32); /* change both channels */
|
|
mutex_lock(&tt->lock);
|
|
for (i = 0; i < 8; i++) {
|
|
if (volume & (0x80 >> i))
|
|
outb(0x80, tt->io + 1);
|
|
else
|
|
outb(0x00, tt->io + 1);
|
|
}
|
|
mutex_unlock(&tt->lock);
|
|
}
|
|
|
|
|
|
|
|
static void tt_mute(struct terratec *tt)
|
|
{
|
|
tt->muted = 1;
|
|
tt_write_vol(tt, 0);
|
|
}
|
|
|
|
static int tt_setvol(struct terratec *tt, int vol)
|
|
{
|
|
if (vol == tt->curvol) { /* requested volume = current */
|
|
if (tt->muted) { /* user is unmuting the card */
|
|
tt->muted = 0;
|
|
tt_write_vol(tt, vol); /* enable card */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (vol == 0) { /* volume = 0 means mute the card */
|
|
tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
|
|
tt->curvol = vol; /* track the volume state! */
|
|
return 0;
|
|
}
|
|
|
|
tt->muted = 0;
|
|
tt_write_vol(tt, vol);
|
|
tt->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 terratec *tt, unsigned long freq1)
|
|
{
|
|
int freq;
|
|
int i;
|
|
int p;
|
|
int temp;
|
|
long rest;
|
|
unsigned char buffer[25]; /* we have to bit shift 25 registers */
|
|
|
|
mutex_lock(&tt->lock);
|
|
|
|
tt->curfreq = freq1;
|
|
|
|
freq = freq1 / 160; /* convert the freq. to a nice to handle value */
|
|
memset(buffer, 0, sizeof(buffer));
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
|
|
if (buffer[i] == 1) {
|
|
outb(WRT_EN | DATA, tt->io);
|
|
outb(WRT_EN | DATA | CLK_ON, tt->io);
|
|
outb(WRT_EN | DATA, tt->io);
|
|
} else {
|
|
outb(WRT_EN | 0x00, tt->io);
|
|
outb(WRT_EN | 0x00 | CLK_ON, tt->io);
|
|
}
|
|
}
|
|
outb(0x00, tt->io);
|
|
|
|
mutex_unlock(&tt->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tt_getsigstr(struct terratec *tt)
|
|
{
|
|
if (inb(tt->io) & 2) /* bit set = no signal present */
|
|
return 0;
|
|
return 1; /* signal present */
|
|
}
|
|
|
|
static int vidioc_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *v)
|
|
{
|
|
strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
|
|
strlcpy(v->card, "ActiveRadio", sizeof(v->card));
|
|
strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
|
|
v->version = RADIO_VERSION;
|
|
v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_tuner(struct file *file, void *priv,
|
|
struct v4l2_tuner *v)
|
|
{
|
|
struct terratec *tt = video_drvdata(file);
|
|
|
|
if (v->index > 0)
|
|
return -EINVAL;
|
|
|
|
strlcpy(v->name, "FM", sizeof(v->name));
|
|
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 * tt_getsigstr(tt);
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_tuner(struct file *file, void *priv,
|
|
struct v4l2_tuner *v)
|
|
{
|
|
return v->index ? -EINVAL : 0;
|
|
}
|
|
|
|
static int vidioc_s_frequency(struct file *file, void *priv,
|
|
struct v4l2_frequency *f)
|
|
{
|
|
struct terratec *tt = video_drvdata(file);
|
|
|
|
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
|
|
return -EINVAL;
|
|
tt_setfreq(tt, f->frequency);
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_frequency(struct file *file, void *priv,
|
|
struct v4l2_frequency *f)
|
|
{
|
|
struct terratec *tt = video_drvdata(file);
|
|
|
|
if (f->tuner != 0)
|
|
return -EINVAL;
|
|
f->type = V4L2_TUNER_RADIO;
|
|
f->frequency = tt->curfreq;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_queryctrl(struct file *file, void *priv,
|
|
struct v4l2_queryctrl *qc)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int vidioc_g_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct terratec *tt = video_drvdata(file);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
if (tt->muted)
|
|
ctrl->value = 1;
|
|
else
|
|
ctrl->value = 0;
|
|
return 0;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
ctrl->value = tt->curvol * 6554;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int vidioc_s_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct terratec *tt = video_drvdata(file);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
if (ctrl->value)
|
|
tt_mute(tt);
|
|
else
|
|
tt_setvol(tt,tt->curvol);
|
|
return 0;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
tt_setvol(tt,ctrl->value);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
|
|
{
|
|
return i ? -EINVAL : 0;
|
|
}
|
|
|
|
static int vidioc_g_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *a)
|
|
{
|
|
a->index = 0;
|
|
strlcpy(a->name, "Radio", sizeof(a->name));
|
|
a->capability = V4L2_AUDCAP_STEREO;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *a)
|
|
{
|
|
return a->index ? -EINVAL : 0;
|
|
}
|
|
|
|
static const struct v4l2_file_operations terratec_fops = {
|
|
.owner = THIS_MODULE,
|
|
.ioctl = video_ioctl2,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_g_tuner = vidioc_g_tuner,
|
|
.vidioc_s_tuner = vidioc_s_tuner,
|
|
.vidioc_g_frequency = vidioc_g_frequency,
|
|
.vidioc_s_frequency = vidioc_s_frequency,
|
|
.vidioc_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
.vidioc_g_audio = vidioc_g_audio,
|
|
.vidioc_s_audio = vidioc_s_audio,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
};
|
|
|
|
static int __init terratec_init(void)
|
|
{
|
|
struct terratec *tt = &terratec_card;
|
|
struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
|
|
int res;
|
|
|
|
strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
|
|
tt->io = io;
|
|
if (tt->io == -1) {
|
|
v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
|
|
return -EINVAL;
|
|
}
|
|
if (!request_region(tt->io, 2, "terratec")) {
|
|
v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
|
|
return -EBUSY;
|
|
}
|
|
|
|
res = v4l2_device_register(NULL, v4l2_dev);
|
|
if (res < 0) {
|
|
release_region(tt->io, 2);
|
|
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
|
|
return res;
|
|
}
|
|
|
|
strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
|
|
tt->vdev.v4l2_dev = v4l2_dev;
|
|
tt->vdev.fops = &terratec_fops;
|
|
tt->vdev.ioctl_ops = &terratec_ioctl_ops;
|
|
tt->vdev.release = video_device_release_empty;
|
|
video_set_drvdata(&tt->vdev, tt);
|
|
|
|
mutex_init(&tt->lock);
|
|
|
|
if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
|
|
v4l2_device_unregister(&tt->v4l2_dev);
|
|
release_region(tt->io, 2);
|
|
return -EINVAL;
|
|
}
|
|
|
|
v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
|
|
|
|
/* mute card - prevents noisy bootups */
|
|
tt_write_vol(tt, 0);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit terratec_exit(void)
|
|
{
|
|
struct terratec *tt = &terratec_card;
|
|
struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
|
|
|
|
video_unregister_device(&tt->vdev);
|
|
v4l2_device_unregister(&tt->v4l2_dev);
|
|
release_region(tt->io, 2);
|
|
v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
|
|
}
|
|
|
|
module_init(terratec_init);
|
|
module_exit(terratec_exit);
|
|
|