linux/drivers/media/radio/radio-rtrack2.c
Hans Verkuil 32958fdd16 [media] BKL: trivial BKL removal from V4L2 radio drivers
The patch converts a bunch of V4L2 radio drivers to unlocked_ioctl.

These are all simple conversions: most already had a lock and so the ioctl
fop could simply be replaced by unlocked_ioctl.

radio-miropcm20.c was converted to use the new V4L2 core lock.

While doing this work I noticed that many of these drivers initialized
some more fields or muted audio or something like that *after* creating
the device node. This should be done before the device node is created
to prevent problems. Especially hal tends to grab a device node as soon
as it is created.

In one or two cases the mutex_init was even done after the device creation!

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-12-01 20:10:05 -02:00

345 lines
7.6 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);
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
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);
if (f->tuner != 0)
return -EINVAL;
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,
.unlocked_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);
/* mute card - prevents noisy bootups */
outb(1, dev->io);
dev->muted = 1;
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");
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);