On 07/30/2012 07:07 PM, poma wrote:
> On 07/30/2012 02:56 PM, David Basden wrote:
>>>>>> Right now I really don't know where I should look for the solution of
>>>>>> the problem. It seems that the tuner reset does not have any effect on the 
>>>>>> tuner whatsoever.
>>
>> Can I suggest setting GPIO5 to 1, leave it there, and see if it breaks. If it
>> doesn't, GPIO5 on the RTL isn't setup correctly somehow.
>>
>> At the same time, I was rereading code from:
>>
>> http://git.linuxtv.org/anttip/media_tree.git/blob/3efd26330fda97e06279cbca170ae4a0dee53220:/drivers/media/dvb/dvb-usb/rtl28xxu.c#l898
>>
>> and at no point is GPIO5 actually set to an output or enabled that I can find.
>> rtl2832u_frontend_attach skips doing so. (Actually, I seem to remember running
>> into this problem while trying to use some DVB driver code as an example of
>> how to setup the RTL to talk to the FC0012)
>>
>> Try giving the patch below a go. Sorry, I don't have a build environment to
>> hand, so there might be a typo I haven't picked up, but the upshot is that 
>> I'm moving the FC0012 detection to the end, setting up GPIO5, resetting the
>> tuner and then trying to probe for the FC0012.
>>
>> Please let me know if this helps :)
>>
>> David
>>
>> --- a/rtl28xxu.c	2012-07-30 22:31:53.789638678 +1000
>> +++ b/rtl28xxu.c	2012-07-30 22:48:35.774607232 +1000
>> @@ -550,15 +550,6 @@
>>  
>>  	priv->tuner = TUNER_NONE;
>>  
>> -	/* check FC0012 ID register; reg=00 val=a1 */
>> -	ret = rtl28xxu_ctrl_msg(adap->dev, &req_fc0012);
>> -	if (ret == 0 && buf[0] == 0xa1) {
>> -		priv->tuner = TUNER_RTL2832_FC0012;
>> -		rtl2832_config = &rtl28xxu_rtl2832_fc0012_config;
>> -		info("%s: FC0012 tuner found", __func__);
>> -		goto found;
>> -	}
>> -
>>  	/* check FC0013 ID register; reg=00 val=a3 */
>>  	ret = rtl28xxu_ctrl_msg(adap->dev, &req_fc0013);
>>  	if (ret == 0 && buf[0] == 0xa3) {
>> @@ -640,6 +631,71 @@
>>  		goto unsupported;
>>  	}
>>  
>> +	/* If it's a FC0012, we need to bring GPIO5/RESET
>> +	   out of floating or it's not going to show up.
>> +	   We set GPIO5 to an output, enable the output, then
>> +	   reset the tuner by bringing GPIO5 high then low again.
>> +
>> +	   We're testing this last so that we don't accidentally
>> +	   mess with other hardware that wouldn't like us messing
>> +	   with whatever is connected to the rtl2832's GPIO5
>> +	*/
>> +
>> +	/* close demod I2C gate */
>> +	ret = rtl28xxu_ctrl_msg(adap->dev, &req_gate_close);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* Set GPIO5 to be an output */
>> +	ret = rtl28xx_rd_reg(adap->dev, SYS_GPIO_DIR, &val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	val &= 0xdf;
>> +	ret = rtl28xx_wr_reg(adap->dev, SYS_GPIO_DIR, val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* enable as output GPIO5 */
>> +	ret = rtl28xx_rd_reg(adap->dev, SYS_GPIO_OUT_EN, &val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	val |= 0x20;
>> +	ret = rtl28xx_wr_reg(adap->dev, SYS_GPIO_OUT_EN, val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* set GPIO5 high to reset fc0012 (if it exists) */
>> +	ret = rtl28xx_rd_reg(adap->dev, SYS_GPIO_OUT_VAL, &val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	val |= 0x20; 
>> +	ret = rtl28xx_wr_reg(adap->dev, SYS_GPIO_OUT_VAL, val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* bring GPIO5 low again after reset */
>> +	val &= 0xdf;
>> +	ret = rtl28xx_wr_reg(adap->dev, SYS_GPIO_OUT_VAL, val);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* re-open demod I2C gate */
>> +	ret = rtl28xxu_ctrl_msg(adap->dev, &req_gate_open);
>> +	if (ret)
>> +		goto err;
>> +
>> +	/* check FC0012 ID register; reg=00 val=a1 */
>> +	ret = rtl28xxu_ctrl_msg(adap->dev, &req_fc0012);
>> +	if (ret == 0 && buf[0] == 0xa1) {
>> +		priv->tuner = TUNER_RTL2832_FC0012;
>> +		rtl2832_config = &rtl28xxu_rtl2832_fc0012_config;
>> +		info("%s: FC0012 tuner found", __func__);
>> +		goto found;
>> +	}
>> +
>>  unsupported:
>>  	/* close demod I2C gate */
>>  	ret = rtl28xxu_ctrl_msg(adap->dev, &req_gate_close);
>>
> 
> …sorry for the delay,
> After applied patch no luck - in attach is dmesg for working original
> Realtek driver(dvb_usb_rtl2832), and second one(dvb-usb-rtl28xxu)
> rtl2832 part by Thomas with tuner issue, still not working.
> Most intriguing is tuner get stucked by tuning(t-zapping)!
> 

…after warm/unload/load/reboot of course ;)

This is full set of logs.
Tuner(fc0012) has no debug facility(parm), so nothing from there.
modprobe.d/.conf:
options dvb_core frontend_debug=1 debug=1 dvbdev_debug=1
options dvb_usb debug=511
options dvb_usb_rtl28xxu debug=1
options rtl2832 debug=1

Cheers,
poma