kevin/linux
1
Fork 0
Code
e17cc08c2f
linux/drivers/media/radio/radio-trust.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

431 lines
10 KiB
C
Raw Blame History

/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
* by Eric Lammerts <eric@scintilla.utwente.nl>
*
* Based on radio-aztech.c. Original notes:
*
* Adapted to support the Video for Linux API by
* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
*
* Quay Ly
* Donald Song
* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
*
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
*/
#include <stdarg.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#include <linux/videodev2.h>
#include <linux/io.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
MODULE_LICENSE("GPL");
/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
#ifndef CONFIG_RADIO_TRUST_PORT
#define CONFIG_RADIO_TRUST_PORT -1
#endif
static int io = CONFIG_RADIO_TRUST_PORT;
static int radio_nr = -1;
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
module_param(radio_nr, int, 0);
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
struct trust {
struct v4l2_device v4l2_dev;
struct video_device vdev;
int io;
int ioval;
__u16 curvol;
__u16 curbass;
__u16 curtreble;
int muted;
unsigned long curfreq;
int curstereo;
int curmute;
struct mutex lock;
};
static struct trust trust_card;
/* i2c addresses */
#define TDA7318_ADDR 0x88
#define TSA6060T_ADDR 0xc4
#define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0)
#define TR_SET_SCL outb(tr->ioval |= 2, tr->io)
#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io)
#define TR_SET_SDA outb(tr->ioval |= 1, tr->io)
#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io)
static void write_i2c(struct trust *tr, int n, ...)
{
unsigned char val, mask;
va_list args;
va_start(args, n);
/* start condition */
TR_SET_SDA;
TR_SET_SCL;
TR_DELAY;
TR_CLR_SDA;
TR_CLR_SCL;
TR_DELAY;
for(; n; n--) {
val = va_arg(args, unsigned);
for(mask = 0x80; mask; mask >>= 1) {
if(val & mask)
TR_SET_SDA;
else
TR_CLR_SDA;
TR_SET_SCL;
TR_DELAY;
TR_CLR_SCL;
TR_DELAY;
}
/* acknowledge bit */
TR_SET_SDA;
TR_SET_SCL;
TR_DELAY;
TR_CLR_SCL;
TR_DELAY;
}
/* stop condition */
TR_CLR_SDA;
TR_DELAY;
TR_SET_SCL;
TR_DELAY;
TR_SET_SDA;
TR_DELAY;
va_end(args);
}
static void tr_setvol(struct trust *tr, __u16 vol)
{
mutex_lock(&tr->lock);
tr->curvol = vol / 2048;
write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f);
mutex_unlock(&tr->lock);
}
static int basstreble2chip[15] = {
0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
};
static void tr_setbass(struct trust *tr, __u16 bass)
{
mutex_lock(&tr->lock);
tr->curbass = bass / 4370;
write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]);
mutex_unlock(&tr->lock);
}
static void tr_settreble(struct trust *tr, __u16 treble)
{
mutex_lock(&tr->lock);
tr->curtreble = treble / 4370;
write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]);
mutex_unlock(&tr->lock);
}
static void tr_setstereo(struct trust *tr, int stereo)
{
mutex_lock(&tr->lock);
tr->curstereo = !!stereo;
tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2);
outb(tr->ioval, tr->io);
mutex_unlock(&tr->lock);
}
static void tr_setmute(struct trust *tr, int mute)
{
mutex_lock(&tr->lock);
tr->curmute = !!mute;
tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3);
outb(tr->ioval, tr->io);
mutex_unlock(&tr->lock);
}
static int tr_getsigstr(struct trust *tr)
{
int i, v;
mutex_lock(&tr->lock);
for (i = 0, v = 0; i < 100; i++)
v |= inb(tr->io);
mutex_unlock(&tr->lock);
return (v & 1) ? 0 : 0xffff;
}
static int tr_getstereo(struct trust *tr)
{
/* don't know how to determine it, just return the setting */
return tr->curstereo;
}
static void tr_setfreq(struct trust *tr, unsigned long f)
{
mutex_lock(&tr->lock);
tr->curfreq = f;
f /= 160; /* Convert to 10 kHz units */
f += 1070; /* Add 10.7 MHz IF */
write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
mutex_unlock(&tr->lock);
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-trust", sizeof(v->driver));
strlcpy(v->card, "Trust FM 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 trust *tr = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
strlcpy(v->name, "FM", sizeof(v->name));
v->type = V4L2_TUNER_RADIO;
v->rangelow = 87.5 * 16000;
v->rangehigh = 108 * 16000;
v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
v->capability = V4L2_TUNER_CAP_LOW;
if (tr_getstereo(tr))
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = tr_getsigstr(tr);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct trust *tr = video_drvdata(file);
if (v->index)
return -EINVAL;
tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO);
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct trust *tr = video_drvdata(file);
tr_setfreq(tr, f->frequency);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct trust *tr = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = tr->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, 2048, 65535);
case V4L2_CID_AUDIO_BASS:
case V4L2_CID_AUDIO_TREBLE:
return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768);
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct trust *tr = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = tr->curmute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = tr->curvol * 2048;
return 0;
case V4L2_CID_AUDIO_BASS:
ctrl->value = tr->curbass * 4370;
return 0;
case V4L2_CID_AUDIO_TREBLE:
ctrl->value = tr->curtreble * 4370;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct trust *tr = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
tr_setmute(tr, ctrl->value);
return 0;
case V4L2_CID_AUDIO_VOLUME:
tr_setvol(tr, ctrl->value);
return 0;
case V4L2_CID_AUDIO_BASS:
tr_setbass(tr, ctrl->value);
return 0;
case V4L2_CID_AUDIO_TREBLE:
tr_settreble(tr, 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 trust_fops = {
.owner = THIS_MODULE,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops trust_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 trust_init(void)
{
struct trust *tr = &trust_card;
struct v4l2_device *v4l2_dev = &tr->v4l2_dev;
int res;
strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name));
tr->io = io;
tr->ioval = 0xf;
mutex_init(&tr->lock);
if (tr->io == -1) {
v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n");
return -EINVAL;
}
if (!request_region(tr->io, 2, "Trust FM Radio")) {
v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io);
return -EBUSY;
}
res = v4l2_device_register(NULL, v4l2_dev);
if (res < 0) {
release_region(tr->io, 2);
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
return res;
}
strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name));
tr->vdev.v4l2_dev = v4l2_dev;
tr->vdev.fops = &trust_fops;
tr->vdev.ioctl_ops = &trust_ioctl_ops;
tr->vdev.release = video_device_release_empty;
video_set_drvdata(&tr->vdev, tr);
if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
v4l2_device_unregister(v4l2_dev);
release_region(tr->io, 2);
return -EINVAL;
}
v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n");
write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
tr_setvol(tr, 0xffff);
tr_setbass(tr, 0x8000);
tr_settreble(tr, 0x8000);
tr_setstereo(tr, 1);
/* mute card - prevents noisy bootups */
tr_setmute(tr, 1);
return 0;
}
static void __exit cleanup_trust_module(void)
{
struct trust *tr = &trust_card;
video_unregister_device(&tr->vdev);
v4l2_device_unregister(&tr->v4l2_dev);
release_region(tr->io, 2);
}
module_init(trust_init);
module_exit(cleanup_trust_module);
View Git Blame Copy Permalink