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kernel-ark/drivers/media/video/tuner-core.c
Jean Delvare b3d5496ea5 [PATCH] I2C: Kill address ranges in non-sensors i2c chip drivers 
Some months ago, you killed the address ranges mechanism from all
sensors i2c chip drivers (both the module parameters and the in-code
address lists). I think it was a very good move, as the ranges can
easily be replaced by individual addresses, and this allowed for
significant cleanups in the i2c core (let alone the impressive size
shrink for all these drivers).

Unfortunately you did not do the same for non-sensors i2c chip drivers.
These need the address ranges even less, so we could get rid of the
ranges here as well for another significant i2c core cleanup. Here comes
a patch which does just that. Since the process is exactly the same as
what you did for the other drivers set already, I did not split this one
in parts.

A documentation update is included.

The change saves 308 bytes in the i2c core, and an average 1382 bytes
for chip drivers which use I2C_CLIENT_INSMOD, 126 bytes for those which
do not.

This change is required if we want to merge the sensors and non-sensors
i2c code (and we want to do this).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/Documentation/i2c/writing-clients
===================================================================
2005-06-21 21:51:48 -07:00

451 lines
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/*
* $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 */
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 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[1] = I2C_CLIENT_END;
}
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:
*/
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