Re: cx88 driver: Help needed to add radio support on Leadtek WINFAST DTV 2000 H (version J)
- Date: Fri, 09 May 2008 02:58:30 +0200
- From: hermann pitton <hermann-pitton@xxxxxxxx>
- Subject: Re: cx88 driver: Help needed to add radio support on Leadtek WINFAST DTV 2000 H (version J)
Am Donnerstag, den 08.05.2008, 20:13 -0400 schrieb Andy Walls:
> On Thu, 2008-05-08 at 23:30 +0200, Andre Auzi wrote:
> > Hello list,
> >
> > I've started the task to add support of the board mentionned above.
> >
> > So far I've got analog TV, Composite and Svideo inputs working OK with
> > IR as well.
> >
> > Unfortunately, my area does not have DVB-T yet, but from the scans I've
> > made, I'm confident DVB support is on good tracks.
> >
> > Nevertheless, I cannot achieve to have the radio input working.
> >
> > The gpio values were captured with regspy on a working windows installation.
>
> With the ivtv driver, I helped debug the LG TAPE-H series tuner on the
> PVR-150MCE not demodulating FM radio. (Hans actually got the fix put
> in.) The problem turned out to be the incorrect "bandswitch byte" being
> set in tuner-simple.c. AFAICT, the gpio values for the CX23416 aren't
> used to set the FM radio on the PVR-150MCE.
>
> There is a "bandswitch byte" in the synthesizer/1st mixer chip (probably
> a tua603x chip) in the tuner that controls some gpio pins. These gpio
> pins setup the tuner's preselector by switching in the proper bandpass
> filter for the Low VHF, FM, High-VHF, or UHF bands
>
> For the FM1216ME_MK3 tuner (not the FMD1216ME_MK3) this bandswitch byte
> needs to be set to 0x98 for FM stereo or 0x9a for FM mono.
>
> I notice in tuner-simple.c:simple_radio_bandswitch(), that for both the
> FM1216ME_MK3 and the FMD1216ME_MK3, the bandswitch byte for FM is coded
> as 0x19. This is a bit-reversal of 0x98. This seems wrong according to
> the FM1216ME_MK3 tuner datasheet here:
>
> http://dl.ivtvdriver.org/datasheets/tuners/FM1216ME_MK3.pdf
>
> I can't find the FMD1216ME_MK3 datasheet with some quick google
> searches. I cannot conclusively say the coded bandswitch byte of 0x19
> is wrong for the FMD1261ME_MK3, but I think it's worth some
> investigation/experimentation.
Hi,
it is, we were only hackers!
And there is no substitution for it.
The radio stereo hack was specific for the FM1216ME/I H-3 (MK3) and the
FMD1216ME/I H-3 (MK-3) never could utilize that bit reading out the
stereo status for FM ...
Cheers,
Hermann
>
> You might also want to check/fix the tuner-simple.c:tuner_stereo()
> function while you're at it.
>
> Good luck,
> Andy
>
>
> >
> > Here are my additions in cx88-cards.c:
> >
> > diff -r 0a072dd11cd8 linux/drivers/media/video/cx88/cx88-cards.c
> > --- a/linux/drivers/media/video/cx88/cx88-cards.c Wed May 07 15:42:54
> > 2008 -0300
> > +++ b/linux/drivers/media/video/cx88/cx88-cards.c Thu May 08 23:07:36
> > 2008 +0200
> > @@ -1300,6 +1300,52 @@
> > }},
> > .mpeg = CX88_MPEG_DVB,
> > },
> > + [CX88_BOARD_WINFAST_DTV2000H_VERSION_J] = {
> > + /* Radio still in testing */
> > + .name = "WinFast DTV2000 H (version J)",
> > + .tuner_type = TUNER_PHILIPS_FMD1216ME_MK3,
> > + .radio_type = UNSET,
> > + .tuner_addr = ADDR_UNSET,
> > + .radio_addr = ADDR_UNSET,
> > + .tda9887_conf = TDA9887_PRESENT,
> > + .input = {{
> > + .type = CX88_VMUX_TELEVISION,
> > + .vmux = 0,
> > + .gpio0 = 0x00013700,
> > + .gpio1 = 0x0000a207,
> > + .gpio2 = 0x00013700,
> > + .gpio3 = 0x02000000,
> > + },{
> > + .type = CX88_VMUX_CABLE,
> > + .vmux = 0,
> > + .gpio0 = 0x0001b700,
> > + .gpio1 = 0x0000a207,
> > + .gpio2 = 0x0001b700,
> > + .gpio3 = 0x02000000,
> > + },{
> > + .type = CX88_VMUX_COMPOSITE1,
> > + .vmux = 1,
> > + .gpio0 = 0x00013701,
> > + .gpio1 = 0x0000a207,
> > + .gpio2 = 0x00013701,
> > + .gpio3 = 0x02000000,
> > + },{
> > + .type = CX88_VMUX_SVIDEO,
> > + .vmux = 2,
> > + .gpio0 = 0x00013701,
> > + .gpio1 = 0x0000a207,
> > + .gpio2 = 0x00013701,
> > + .gpio3 = 0x02000000,
> > + } },
> > + .radio = {
> > + .type = CX88_RADIO,
> > + .gpio0 = 0x00013702,
> > + .gpio1 = 0x0000a207,
> > + .gpio2 = 0x00013702,
> > + .gpio3 = 0x02000000,
> > + },
> > + },
> > [CX88_BOARD_GENIATECH_DVBS] = {
> > .name = "Geniatech DVB-S",
> > .tuner_type = TUNER_ABSENT,
> > @@ -1957,6 +2003,10 @@
> > .subdevice = 0x665e,
> > .card = CX88_BOARD_WINFAST_DTV2000H,
> > },{
> > + .subvendor = 0x107d,
> > + .subdevice = 0x6f2b,
> > + .card = CX88_BOARD_WINFAST_DTV2000H_VERSION_J,
> > + },{
> > .subvendor = 0x18ac,
> > .subdevice = 0xd800, /* FusionHDTV 3 Gold (original revision) */
> > .card = CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q,
> >
> >
> > Would there be someone in the list with cx88 driver knowledge who
> > already achieved this for another board and could hint me on things to
> > look for?
> >
> > I kindof reached the limits of my imagination and would really
> > appreciate a help.
> >
> > So far my modprobe.conf reads:
> >
> > options tda9887 debug=1
> > options cx22702 debug=1
> > options cx88xx i2c_debug=1 i2c_scan=1 audio_debug=1
> > options cx8800 video_debug=1
> >
> > and I would join the dmesg output if I did not care to flood the list.
> >
> > Just let me know if it could help.
> >
> > Thanks in advance
> > Andre
>
>
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