linux/drivers/media/radio/radio-rtrack2.c
Alexey Klimov ff1a3ebb9c V4L/DVB (11391): pci-isa radios: remove open and release functions
Patch removes empty open and release functions in pci and isa radio
drivers, setting them to NULL. V4L module doesn't call for them due to
previous patch.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-04-06 21:44:30 -03:00

341 lines
7.5 KiB
C

/* 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@lxorguk.ukuu.org.uk>
* 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 <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("Ben Pfaff");
MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
MODULE_LICENSE("GPL");
#ifndef CONFIG_RADIO_RTRACK2_PORT
#define CONFIG_RADIO_RTRACK2_PORT -1
#endif
static int io = CONFIG_RADIO_RTRACK2_PORT;
static int radio_nr = -1;
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
module_param(radio_nr, int, 0);
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
struct rtrack2
{
struct v4l2_device v4l2_dev;
struct video_device vdev;
int io;
unsigned long curfreq;
int muted;
struct mutex lock;
};
static struct rtrack2 rtrack2_card;
/* local things */
static void rt_mute(struct rtrack2 *dev)
{
if (dev->muted)
return;
mutex_lock(&dev->lock);
outb(1, dev->io);
mutex_unlock(&dev->lock);
dev->muted = 1;
}
static void rt_unmute(struct rtrack2 *dev)
{
if(dev->muted == 0)
return;
mutex_lock(&dev->lock);
outb(0, dev->io);
mutex_unlock(&dev->lock);
dev->muted = 0;
}
static void zero(struct rtrack2 *dev)
{
outb_p(1, dev->io);
outb_p(3, dev->io);
outb_p(1, dev->io);
}
static void one(struct rtrack2 *dev)
{
outb_p(5, dev->io);
outb_p(7, dev->io);
outb_p(5, dev->io);
}
static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
{
int i;
mutex_lock(&dev->lock);
dev->curfreq = freq;
freq = freq / 200 + 856;
outb_p(0xc8, dev->io);
outb_p(0xc9, dev->io);
outb_p(0xc9, dev->io);
for (i = 0; i < 10; i++)
zero(dev);
for (i = 14; i >= 0; i--)
if (freq & (1 << i))
one(dev);
else
zero(dev);
outb_p(0xc8, dev->io);
if (!dev->muted)
outb_p(0, dev->io);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
strlcpy(v->card, "RadioTrack II", 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_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
return v->index ? -EINVAL : 0;
}
static int rt_getsigstr(struct rtrack2 *dev)
{
int sig = 1;
mutex_lock(&dev->lock);
if (inb(dev->io) & 2) /* bit set = no signal present */
sig = 0;
mutex_unlock(&dev->lock);
return sig;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct rtrack2 *rt = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
strlcpy(v->name, "FM", sizeof(v->name));
v->type = V4L2_TUNER_RADIO;
v->rangelow = 88 * 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 * rt_getsigstr(rt);
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct rtrack2 *rt = video_drvdata(file);
rt_setfreq(rt, f->frequency);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct rtrack2 *rt = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = rt->curfreq;
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
switch (qc->id) {
case V4L2_CID_AUDIO_MUTE:
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct rtrack2 *rt = video_drvdata(file);
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;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct rtrack2 *rt = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value)
rt_mute(rt);
else
rt_unmute(rt);
return 0;
case V4L2_CID_AUDIO_VOLUME:
if (ctrl->value)
rt_unmute(rt);
else
rt_mute(rt);
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 rtrack2_fops = {
.owner = THIS_MODULE,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops rtrack2_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 rtrack2_init(void)
{
struct rtrack2 *dev = &rtrack2_card;
struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
int res;
strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
dev->io = io;
if (dev->io == -1) {
v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
return -EINVAL;
}
if (!request_region(dev->io, 4, "rtrack2")) {
v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
return -EBUSY;
}
res = v4l2_device_register(NULL, v4l2_dev);
if (res < 0) {
release_region(dev->io, 4);
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
return res;
}
strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
dev->vdev.v4l2_dev = v4l2_dev;
dev->vdev.fops = &rtrack2_fops;
dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
dev->vdev.release = video_device_release_empty;
video_set_drvdata(&dev->vdev, dev);
mutex_init(&dev->lock);
if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
v4l2_device_unregister(v4l2_dev);
release_region(dev->io, 4);
return -EINVAL;
}
v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");
/* mute card - prevents noisy bootups */
outb(1, dev->io);
dev->muted = 1;
return 0;
}
static void __exit rtrack2_exit(void)
{
struct rtrack2 *dev = &rtrack2_card;
video_unregister_device(&dev->vdev);
v4l2_device_unregister(&dev->v4l2_dev);
release_region(dev->io, 4);
}
module_init(rtrack2_init);
module_exit(rtrack2_exit);