/*
* $Id: tuner-core.c,v 1.5 2005/02/15 15:59:35 kraxel Exp $
*
* i2c tv tuner chip device driver
* core core, i.e. kernel interfaces, registering and so on
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>
#include <media/tuner.h>
#include <media/audiochip.h>
#define UNSET (-1U)
/* standard i2c insmod options */
static unsigned short normal_i2c[] = {
0x4b, /* tda8290 */
I2C_CLIENT_END
};
static unsigned short normal_i2c_range[] = {
0x60, 0x6f,
I2C_CLIENT_END
};
I2C_CLIENT_INSMOD;
/* insmod options used at init time => read/only */
static unsigned int addr = 0;
module_param(addr, int, 0444);
/* insmod options used at runtime => read/write */
unsigned int tuner_debug = 0;
module_param(tuner_debug, int, 0644);
static unsigned int tv_range[2] = { 44, 958 };
static unsigned int radio_range[2] = { 65, 108 };
module_param_array(tv_range, int, NULL, 0644);
module_param_array(radio_range, int, NULL, 0644);
MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");
static int this_adap;
static struct i2c_driver driver;
static struct i2c_client client_template;
/* ---------------------------------------------------------------------- */
// Set tuner frequency, freq in Units of 62.5kHz = 1/16MHz
static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
if (t->type == UNSET) {
tuner_info("tuner type not set\n");
return;
}
if (NULL == t->tv_freq) {
tuner_info("Huh? tv_set is NULL?\n");
return;
}
if (freq < tv_range[0]*16 || freq > tv_range[1]*16) {
/* FIXME: better do that chip-specific, but
right now we don't have that in the config
struct and this way is still better than no
check at all */
tuner_info("TV freq (%d.%02d) out of range (%d-%d)\n",
freq/16,freq%16*100/16,tv_range[0],tv_range[1]);
return;
}
t->tv_freq(c,freq);
}
static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
if (t->type == UNSET) {
tuner_info("tuner type not set\n");
return;
}
if (NULL == t->radio_freq) {
tuner_info("no radio tuning for this one, sorry.\n");
return;
}
if (freq < radio_range[0]*16 || freq > radio_range[1]*16) {
tuner_info("radio freq (%d.%02d) out of range (%d-%d)\n",
freq/16,freq%16*100/16,
radio_range[0],radio_range[1]);
return;
}
t->radio_freq(c,freq);
}
static void set_freq(struct i2c_client *c, unsigned long freq)
{
struct tuner *t = i2c_get_clientdata(c);
switch (t->mode) {
case V4L2_TUNER_RADIO:
tuner_dbg("radio freq set to %lu.%02lu\n",
freq/16,freq%16*100/16);
set_radio_freq(c,freq);
break;
case V4L2_TUNER_ANALOG_TV:
case V4L2_TUNER_DIGITAL_TV:
tuner_dbg("tv freq set to %lu.%02lu\n",
freq/16,freq%16*100/16);
set_tv_freq(c, freq);
break;
}
t->freq = freq;
}
static void set_type(struct i2c_client *c, unsigned int type)
{
struct tuner *t = i2c_get_clientdata(c);
/* sanity check */
if (type == UNSET || type == TUNER_ABSENT)
return;
if (type >= tuner_count)
return;
if (NULL == t->i2c.dev.driver) {
/* not registered yet */
t->type = type;
return;
}
if (t->initialized)
/* run only once */
return;
t->initialized = 1;
t->type = type;
switch (t->type) {
case TUNER_MT2032:
microtune_init(c);
break;
case TUNER_PHILIPS_TDA8290:
tda8290_init(c);
break;
default:
default_tuner_init(c);
break;
}
}
static char pal[] = "-";
module_param_string(pal, pal, sizeof(pal), 0644);
static int tuner_fixup_std(struct tuner *t)
{
if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
/* get more precise norm info from insmod option */
switch (pal[0]) {
case 'b':
case 'B':
case 'g':
case 'G':
tuner_dbg("insmod fixup: PAL => PAL-BG\n");
t->std = V4L2_STD_PAL_BG;
break;
case 'i':
case 'I':
tuner_dbg("insmod fixup: PAL => PAL-I\n");
t->std = V4L2_STD_PAL_I;
break;
case 'd':
case 'D':
case 'k':
case 'K':
tuner_dbg("insmod fixup: PAL => PAL-DK\n");
t->std = V4L2_STD_PAL_DK;
break;
}
}
return 0;
}
/* ---------------------------------------------------------------------- */
static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
struct tuner *t;
if (this_adap > 0)
return -1;
this_adap++;
client_template.adapter = adap;
client_template.addr = addr;
t = kmalloc(sizeof(struct tuner),GFP_KERNEL);
if (NULL == t)
return -ENOMEM;
memset(t,0,sizeof(struct tuner));
memcpy(&t->i2c,&client_template,sizeof(struct i2c_client));
i2c_set_clientdata(&t->i2c, t);
t->type = UNSET;
t->radio_if2 = 10700*1000; // 10.7MHz - FM radio
i2c_attach_client(&t->i2c);
tuner_info("chip found @ 0x%x (%s)\n",
addr << 1, adap->name);
set_type(&t->i2c, t->type);
return 0;
}
static int tuner_probe(struct i2c_adapter *adap)
{
if (0 != addr) {
normal_i2c[0] = addr;
normal_i2c_range[0] = addr;
normal_i2c_range[1] = addr;
}
this_adap = 0;
if (adap->class & I2C_CLASS_TV_ANALOG)
return i2c_probe(adap, &addr_data, tuner_attach);
return 0;
}
static int tuner_detach(struct i2c_client *client)
{
struct tuner *t = i2c_get_clientdata(client);
i2c_detach_client(&t->i2c);
kfree(t);
return 0;
}
#define SWITCH_V4L2 if (!t->using_v4l2 && tuner_debug) \
tuner_info("switching to v4l2\n"); \
t->using_v4l2 = 1;
#define CHECK_V4L2 if (t->using_v4l2) { if (tuner_debug) \
tuner_info("ignore v4l1 call\n"); \
return 0; }
static int
tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
struct tuner *t = i2c_get_clientdata(client);
unsigned int *iarg = (int*)arg;
switch (cmd) {
/* --- configuration --- */
case TUNER_SET_TYPE:
set_type(client,*iarg);
break;
case AUDC_SET_RADIO:
if (V4L2_TUNER_RADIO != t->mode) {
set_tv_freq(client,400 * 16);
t->mode = V4L2_TUNER_RADIO;
}
break;
case AUDC_CONFIG_PINNACLE:
switch (*iarg) {
case 2:
tuner_dbg("pinnacle pal\n");
t->radio_if2 = 33300 * 1000;
break;
case 3:
tuner_dbg("pinnacle ntsc\n");
t->radio_if2 = 41300 * 1000;
break;
}
break;
/* --- v4l ioctls --- */
/* take care: bttv does userspace copying, we'll get a
kernel pointer here... */
case VIDIOCSCHAN:
{
static const v4l2_std_id map[] = {
[ VIDEO_MODE_PAL ] = V4L2_STD_PAL,
[ VIDEO_MODE_NTSC ] = V4L2_STD_NTSC_M,
[ VIDEO_MODE_SECAM ] = V4L2_STD_SECAM,
[ 4 /* bttv */ ] = V4L2_STD_PAL_M,
[ 5 /* bttv */ ] = V4L2_STD_PAL_N,
[ 6 /* bttv */ ] = V4L2_STD_NTSC_M_JP,
};
struct video_channel *vc = arg;
CHECK_V4L2;
t->mode = V4L2_TUNER_ANALOG_TV;
if (vc->norm < ARRAY_SIZE(map))
t->std = map[vc->norm];
tuner_fixup_std(t);
if (t->freq)
set_tv_freq(client,t->freq);
return 0;
}
case VIDIOCSFREQ:
{
unsigned long *v = arg;
CHECK_V4L2;
set_freq(client,*v);
return 0;
}
case VIDIOCGTUNER:
{
struct video_tuner *vt = arg;
CHECK_V4L2;
if (V4L2_TUNER_RADIO == t->mode && t->has_signal)
vt->signal = t->has_signal(client);
return 0;
}
case VIDIOCGAUDIO:
{
struct video_audio *va = arg;
CHECK_V4L2;
if (V4L2_TUNER_RADIO == t->mode && t->is_stereo)
va->mode = t->is_stereo(client)
? VIDEO_SOUND_STEREO
: VIDEO_SOUND_MONO;
return 0;
}
case VIDIOC_S_STD:
{
v4l2_std_id *id = arg;
SWITCH_V4L2;
t->mode = V4L2_TUNER_ANALOG_TV;
t->std = *id;
tuner_fixup_std(t);
if (t->freq)
set_freq(client,t->freq);
break;
}
case VIDIOC_S_FREQUENCY:
{
struct v4l2_frequency *f = arg;
SWITCH_V4L2;
if (V4L2_TUNER_RADIO == f->type &&
V4L2_TUNER_RADIO != t->mode)
set_tv_freq(client,400*16);
t->mode = f->type;
set_freq(client,f->frequency);
break;
}
case VIDIOC_G_FREQUENCY:
{
struct v4l2_frequency *f = arg;
SWITCH_V4L2;
f->type = t->mode;
f->frequency = t->freq;
break;
}
case VIDIOC_G_TUNER:
{
struct v4l2_tuner *tuner = arg;
SWITCH_V4L2;
if (V4L2_TUNER_RADIO == t->mode && t->has_signal)
tuner->signal = t->has_signal(client);
tuner->rangelow = tv_range[0] * 16;
tuner->rangehigh = tv_range[1] * 16;
break;
}
default:
/* nothing */
break;
}
return 0;
}
static int tuner_suspend(struct device * dev, pm_message_t state, u32 level)
{
struct i2c_client *c = container_of(dev, struct i2c_client, dev);
struct tuner *t = i2c_get_clientdata(c);
tuner_dbg("suspend\n");
/* FIXME: power down ??? */
return 0;
}
static int tuner_resume(struct device * dev, u32 level)
{
struct i2c_client *c = container_of(dev, struct i2c_client, dev);
struct tuner *t = i2c_get_clientdata(c);
tuner_dbg("resume\n");
if (t->freq)
set_freq(c,t->freq);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver driver = {
.owner = THIS_MODULE,
.name = "tuner",
.id = I2C_DRIVERID_TUNER,
.flags = I2C_DF_NOTIFY,
.attach_adapter = tuner_probe,
.detach_client = tuner_detach,
.command = tuner_command,
.driver = {
.suspend = tuner_suspend,
.resume = tuner_resume,
},
};
static struct i2c_client client_template =
{
I2C_DEVNAME("(tuner unset)"),
.flags = I2C_CLIENT_ALLOW_USE,
.driver = &driver,
};
static int __init tuner_init_module(void)
{
return i2c_add_driver(&driver);
}
static void __exit tuner_cleanup_module(void)
{
i2c_del_driver(&driver);
}
module_init(tuner_init_module);
module_exit(tuner_cleanup_module);
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
