Pixelview PV-4900 no radio

[Gunther Mayer <gunther.mayer (at) gmx.net>]

Ts. Stoianov wrote:

> PlayTVpro2
> TV-card is PV-4500(FR)
> tuner inside: TNF9835 (remove top cover tuner to see)
>  
You only identified the tuner pcb.
The tuner model is probaby another sticker hidden under the vendor sticker.
You could remove it carefully and probably read it by holding it into a 
light.

> /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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