/*
* ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
*
* Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <sound/core.h>
#include <sound/tea575x-tuner.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
MODULE_LICENSE("GPL");
static int radio_nr = -1;
module_param(radio_nr, int, 0);
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
#define FREQ_LO (87 * 16000)
#define FREQ_HI (108 * 16000)
/*
* definitions
*/
#define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */
#define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */
#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
#define TEA575X_BIT_BAND_MASK (3<<20)
#define TEA575X_BIT_BAND_FM (0<<20)
#define TEA575X_BIT_BAND_MW (1<<20)
#define TEA575X_BIT_BAND_LW (1<<21)
#define TEA575X_BIT_BAND_SW (1<<22)
#define TEA575X_BIT_PORT_0 (1<<19) /* user bit */
#define TEA575X_BIT_PORT_1 (1<<18) /* user bit */
#define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */
#define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */
#define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */
#define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */
#define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */
#define TEA575X_BIT_DUMMY (1<<15) /* buffer */
#define TEA575X_BIT_FREQ_MASK 0x7fff
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,
}
};
/*
* lowlevel part
*/
static void snd_tea575x_set_freq(struct snd_tea575x *tea)
{
unsigned long freq;
freq = tea->freq / 16; /* to kHz */
if (freq > 108000)
freq = 108000;
if (freq < 87000)
freq = 87000;
/* crystal fixup */
if (tea->tea5759)
freq -= tea->freq_fixup;
else
freq += tea->freq_fixup;
/* freq /= 12.5 */
freq *= 10;
freq /= 125;
tea->val &= ~TEA575X_BIT_FREQ_MASK;
tea->val |= freq & TEA575X_BIT_FREQ_MASK;
tea->ops->write(tea, tea->val);
}
/*
* Linux Video interface
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
struct snd_tea575x *tea = video_drvdata(file);
strcpy(v->card, tea->tea5759 ? "TEA5759" : "TEA5757");
strlcpy(v->driver, "tea575x-tuner", sizeof(v->driver));
strlcpy(v->card, "Maestro Radio", sizeof(v->card));
sprintf(v->bus_info, "PCI");
v->version = RADIO_VERSION;
v->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
if (v->index > 0)
return -EINVAL;
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
v->rangelow = FREQ_LO;
v->rangehigh = FREQ_HI;
v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
v->capability = V4L2_TUNER_CAP_LOW;
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = 0xffff;
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
if (v->index > 0)
return -EINVAL;
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct snd_tea575x *tea = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = tea->freq;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct snd_tea575x *tea = video_drvdata(file);
if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
return -EINVAL;
tea->freq = f->frequency;
snd_tea575x_set_freq(tea);
return 0;
}
static int vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
strcpy(a->name, "Radio");
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index != 0)
return -EINVAL;
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 snd_tea575x *tea = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (tea->ops->mute) {
ctrl->value = tea->mute;
return 0;
}
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct snd_tea575x *tea = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (tea->ops->mute) {
tea->ops->mute(tea, ctrl->value);
tea->mute = 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)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int snd_tea575x_exclusive_open(struct file *file)
{
struct snd_tea575x *tea = video_drvdata(file);
return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
}
static int snd_tea575x_exclusive_release(struct file *file)
{
struct snd_tea575x *tea = video_drvdata(file);
clear_bit(0, &tea->in_use);
return 0;
}
static const struct v4l2_file_operations tea575x_fops = {
.owner = THIS_MODULE,
.open = snd_tea575x_exclusive_open,
.release = snd_tea575x_exclusive_release,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops tea575x_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 struct video_device tea575x_radio = {
.name = "tea575x-tuner",
.fops = &tea575x_fops,
.ioctl_ops = &tea575x_ioctl_ops,
.release = video_device_release,
};
/*
* initialize all the tea575x chips
*/
void snd_tea575x_init(struct snd_tea575x *tea)
{
int retval;
unsigned int val;
struct video_device *tea575x_radio_inst;
val = tea->ops->read(tea);
if (val == 0x1ffffff || val == 0) {
snd_printk(KERN_ERR
"tea575x-tuner: Cannot find TEA575x chip\n");
return;
}
tea->in_use = 0;
tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
tea->freq = 90500 * 16; /* 90.5Mhz default */
tea575x_radio_inst = video_device_alloc();
if (tea575x_radio_inst == NULL) {
printk(KERN_ERR "tea575x-tuner: not enough memory\n");
return;
}
memcpy(tea575x_radio_inst, &tea575x_radio, sizeof(tea575x_radio));
strcpy(tea575x_radio.name, tea->tea5759 ?
"TEA5759 radio" : "TEA5757 radio");
video_set_drvdata(tea575x_radio_inst, tea);
retval = video_register_device(tea575x_radio_inst,
VFL_TYPE_RADIO, radio_nr);
if (retval) {
printk(KERN_ERR "tea575x-tuner: can't register video device!\n");
kfree(tea575x_radio_inst);
return;
}
snd_tea575x_set_freq(tea);
/* mute on init */
if (tea->ops->mute) {
tea->ops->mute(tea, 1);
tea->mute = 1;
}
tea->vd = tea575x_radio_inst;
}
void snd_tea575x_exit(struct snd_tea575x *tea)
{
if (tea->vd) {
video_unregister_device(tea->vd);
tea->vd = NULL;
}
}
static int __init alsa_tea575x_module_init(void)
{
return 0;
}
static void __exit alsa_tea575x_module_exit(void)
{
}
module_init(alsa_tea575x_module_init)
module_exit(alsa_tea575x_module_exit)
EXPORT_SYMBOL(snd_tea575x_init);
EXPORT_SYMBOL(snd_tea575x_exit);
