Pixelview PV-4900 no radio

["Ts. Stoianov" <tseso_st (at) abv.bg>]

PlayTVpro2
TV-card is PV-4500(FR)
tuner inside: TNF9835 (remove top cover tuner to see)

/etc/modprobe.conf:

options bttv card=37 tuner=37 radio=1

To make FM-radio work, i changed finction default_set_radio_freq(....) definited in tuner_simple.c kernel source code (linux-2.6.15).
/////////////////////////////////////////
static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
	struct tunertype *tun;
	struct tuner *t = i2c_get_clientdata(c);
	unsigned char buffer[4];
	unsigned div;
	int rc;

	tun = &tuners[t->type];
	div = (20 * freq / 16000) + (int)(20*10.7); // IF 10.7 MHz 
	buffer[2] = (tun->config & ~TUNER_RATIO_MASK) | TUNER_RATIO_SELECT_50; // 50 kHz step 
	buffer[3] = 0x11;//this set tuner in FM-radio mode

	buffer[0] = (div>>8) & 0x7f;
	buffer[1] = div      & 0xff;

	tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
	       buffer[0],buffer[1],buffer[2],buffer[3]);

	if (4 != (rc = i2c_master_send(c,buffer,4)))
		tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
}
//////////////////////////////////////////////

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