linux-stable/drivers/media/radio/radio-zoltrix.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

465 lines
10 KiB
C

/* zoltrix radio plus driver for Linux radio support
* (c) 1998 C. van Schaik <carl@leg.uct.ac.za>
*
* BUGS
* Due to the inconsistency in reading from the signal flags
* it is difficult to get an accurate tuned signal.
*
* It seems that the card is not linear to 0 volume. It cuts off
* at a low volume, and it is not possible (at least I have not found)
* to get fine volume control over the low volume range.
*
* Some code derived from code by Romolo Manfredini
* romolo@bicnet.it
*
* 1999-05-06 - (C. van Schaik)
* - Make signal strength and stereo scans
* kinder to cpu while in delay
* 1999-01-05 - (C. van Schaik)
* - Changed tuning to 1/160Mhz accuracy
* - Added stereo support
* (card defaults to stereo)
* (can explicitly force mono on the card)
* (can detect if station is in stereo)
* - Added unmute function
* - Reworked ioctl functions
* 2002-07-15 - Fix Stereo typo
*
* 2006-07-24 - 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, msleep */
#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("C.van Schaik");
MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
MODULE_LICENSE("GPL");
#ifndef CONFIG_RADIO_ZOLTRIX_PORT
#define CONFIG_RADIO_ZOLTRIX_PORT -1
#endif
static int io = CONFIG_RADIO_ZOLTRIX_PORT;
static int radio_nr = -1;
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Zoltrix Radio Plus (0x20c or 0x30c)");
module_param(radio_nr, int, 0);
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
struct zoltrix {
struct v4l2_device v4l2_dev;
struct video_device vdev;
int io;
int curvol;
unsigned long curfreq;
int muted;
unsigned int stereo;
struct mutex lock;
};
static struct zoltrix zoltrix_card;
static int zol_setvol(struct zoltrix *zol, int vol)
{
zol->curvol = vol;
if (zol->muted)
return 0;
mutex_lock(&zol->lock);
if (vol == 0) {
outb(0, zol->io);
outb(0, zol->io);
inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
mutex_unlock(&zol->lock);
return 0;
}
outb(zol->curvol-1, zol->io);
msleep(10);
inb(zol->io + 2);
mutex_unlock(&zol->lock);
return 0;
}
static void zol_mute(struct zoltrix *zol)
{
zol->muted = 1;
mutex_lock(&zol->lock);
outb(0, zol->io);
outb(0, zol->io);
inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
mutex_unlock(&zol->lock);
}
static void zol_unmute(struct zoltrix *zol)
{
zol->muted = 0;
zol_setvol(zol, zol->curvol);
}
static int zol_setfreq(struct zoltrix *zol, unsigned long freq)
{
/* tunes the radio to the desired frequency */
struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
unsigned long long bitmask, f, m;
unsigned int stereo = zol->stereo;
int i;
if (freq == 0) {
v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n");
return -EINVAL;
}
m = (freq / 160 - 8800) * 2;
f = (unsigned long long)m + 0x4d1c;
bitmask = 0xc480402c10080000ull;
i = 45;
mutex_lock(&zol->lock);
zol->curfreq = freq;
outb(0, zol->io);
outb(0, zol->io);
inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
outb(0x40, zol->io);
outb(0xc0, zol->io);
bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31));
while (i--) {
if ((bitmask & 0x8000000000000000ull) != 0) {
outb(0x80, zol->io);
udelay(50);
outb(0x00, zol->io);
udelay(50);
outb(0x80, zol->io);
udelay(50);
} else {
outb(0xc0, zol->io);
udelay(50);
outb(0x40, zol->io);
udelay(50);
outb(0xc0, zol->io);
udelay(50);
}
bitmask *= 2;
}
/* termination sequence */
outb(0x80, zol->io);
outb(0xc0, zol->io);
outb(0x40, zol->io);
udelay(1000);
inb(zol->io + 2);
udelay(1000);
if (zol->muted) {
outb(0, zol->io);
outb(0, zol->io);
inb(zol->io + 3);
udelay(1000);
}
mutex_unlock(&zol->lock);
if (!zol->muted)
zol_setvol(zol, zol->curvol);
return 0;
}
/* Get signal strength */
static int zol_getsigstr(struct zoltrix *zol)
{
int a, b;
mutex_lock(&zol->lock);
outb(0x00, zol->io); /* This stuff I found to do nothing */
outb(zol->curvol, zol->io);
msleep(20);
a = inb(zol->io);
msleep(10);
b = inb(zol->io);
mutex_unlock(&zol->lock);
if (a != b)
return 0;
/* I found this out by playing with a binary scanner on the card io */
return a == 0xcf || a == 0xdf || a == 0xef;
}
static int zol_is_stereo(struct zoltrix *zol)
{
int x1, x2;
mutex_lock(&zol->lock);
outb(0x00, zol->io);
outb(zol->curvol, zol->io);
msleep(20);
x1 = inb(zol->io);
msleep(10);
x2 = inb(zol->io);
mutex_unlock(&zol->lock);
return x1 == x2 && x1 == 0xcf;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-zoltrix", sizeof(v->driver));
strlcpy(v->card, "Zoltrix Radio", 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 zoltrix *zol = 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 | V4L2_TUNER_SUB_STEREO;
v->capability = V4L2_TUNER_CAP_LOW;
if (zol_is_stereo(zol))
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = 0xFFFF * zol_getsigstr(zol);
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 zoltrix *zol = video_drvdata(file);
if (zol_setfreq(zol, f->frequency) != 0)
return -EINVAL;
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct zoltrix *zol = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = zol->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, 4096, 65535);
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct zoltrix *zol = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = zol->muted;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = zol->curvol * 4096;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct zoltrix *zol = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value)
zol_mute(zol);
else {
zol_unmute(zol);
zol_setvol(zol, zol->curvol);
}
return 0;
case V4L2_CID_AUDIO_VOLUME:
zol_setvol(zol, ctrl->value / 4096);
return 0;
}
zol->stereo = 1;
if (zol_setfreq(zol, zol->curfreq) != 0)
return -EINVAL;
#if 0
/* FIXME: Implement stereo/mono switch on V4L2 */
if (v->mode & VIDEO_SOUND_STEREO) {
zol->stereo = 1;
zol_setfreq(zol, zol->curfreq);
}
if (v->mode & VIDEO_SOUND_MONO) {
zol->stereo = 0;
zol_setfreq(zol, zol->curfreq);
}
#endif
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 zoltrix_fops =
{
.owner = THIS_MODULE,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops zoltrix_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.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,
};
static int __init zoltrix_init(void)
{
struct zoltrix *zol = &zoltrix_card;
struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
int res;
strlcpy(v4l2_dev->name, "zoltrix", sizeof(v4l2_dev->name));
zol->io = io;
if (zol->io == -1) {
v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or 0x30c\n");
return -EINVAL;
}
if (zol->io != 0x20c && zol->io != 0x30c) {
v4l2_err(v4l2_dev, "invalid port, try 0x20c or 0x30c\n");
return -ENXIO;
}
if (!request_region(zol->io, 2, "zoltrix")) {
v4l2_err(v4l2_dev, "port 0x%x already in use\n", zol->io);
return -EBUSY;
}
res = v4l2_device_register(NULL, v4l2_dev);
if (res < 0) {
release_region(zol->io, 2);
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
return res;
}
strlcpy(zol->vdev.name, v4l2_dev->name, sizeof(zol->vdev.name));
zol->vdev.v4l2_dev = v4l2_dev;
zol->vdev.fops = &zoltrix_fops;
zol->vdev.ioctl_ops = &zoltrix_ioctl_ops;
zol->vdev.release = video_device_release_empty;
video_set_drvdata(&zol->vdev, zol);
if (video_register_device(&zol->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
v4l2_device_unregister(v4l2_dev);
release_region(zol->io, 2);
return -EINVAL;
}
v4l2_info(v4l2_dev, "Zoltrix Radio Plus card driver.\n");
mutex_init(&zol->lock);
/* mute card - prevents noisy bootups */
/* this ensures that the volume is all the way down */
outb(0, zol->io);
outb(0, zol->io);
msleep(20);
inb(zol->io + 3);
zol->curvol = 0;
zol->stereo = 1;
return 0;
}
static void __exit zoltrix_exit(void)
{
struct zoltrix *zol = &zoltrix_card;
video_unregister_device(&zol->vdev);
v4l2_device_unregister(&zol->v4l2_dev);
release_region(zol->io, 2);
}
module_init(zoltrix_init);
module_exit(zoltrix_exit);