[Possible regression] TechnoTrend TT-USB2.0 driver appears broken

[Hans Petter Selasky <hps@xxxxxxxxxxx>]

Hi,

Do the technotrend TT-USB 2.0 devices still work with Linux v5.17 ?

Last known working version was Linux v3.16.

ugen0.8: <TechnoTrend TT-USB2.0> at usbus0, cfg=0 md=HOST spd=HIGH 
(480Mbps) pwr=ON (10mA)

  bLength = 0x0012
  bDescriptorType = 0x0001
  bcdUSB = 0x0200
  bDeviceClass = 0x0000  <Probed by interface class>
  bDeviceSubClass = 0x0000
  bDeviceProtocol = 0x0000
  bMaxPacketSize0 = 0x0040
  idVendor = 0x0b48
  idProduct = 0x3007
  bcdDevice = 0x0101
  iManufacturer = 0x0001  <TechnoTrend>
  iProduct = 0x0002  <TT-USB2.0>
  iSerialNumber = 0x0000  <no string>
  bNumConfigurations = 0x0001


First I get this error:

webcamd 98640 - - pctv452e: I2C error -5; AA 91  CC 00 01 -> 0x803003000h

Removed "drivers/media/usb/dvb-usb/pctv452e.c"

>         /* I2C device didn't respond as expected. */
>         ret = -EREMOTEIO;
>         if (buf[6] < rcv_len) {
>                 goto failed;
>         }

Then w_scan complained:

> w_scan version 20120415 (compiled for DVB API 5.11)
> using settings for 0.8 west Thor 3/5 & Intelsat 10-02
> scan type SATELLITE, channellist 53
> output format vdr-1.7
> WARNING: could not guess your codepage. Falling back to 'UTF-8'
> output charset 'UTF-8', use -C <charset> to override
> -_-_-_-_ Getting frontend capabilities-_-_-_-_ 
> Using DVB API 5.b
> frontend 'STB0899 Multistandard' supports
> INVERSION_AUTO
> DVB-S
> DVB-S2
> FREQ (0.95GHz ... 2.15GHz)
> SRATE (5.000MSym/s ... 45.000MSym/s)
> using LNB "UNIVERSAL"
> -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ 
> (time: 00:00) 
> (time: 00:05) 	skipped: (srate 1450000 unsupported by driver)
>
> initial_tune:2265: Setting frontend failed S  f = 11166 kHz V SR =  1450  7/8 0,35  QPSK
> (time: 00:06) 	skipped: (srate 3100000 unsupported by driver)
>
> initial_tune:2265: Setting frontend failed S  f = 11182 kHz V SR =  3100  7/8 0,35  QPSK
> (time: 00:08) 	skipped: (srate 2142000 unsupported by driver)

Tried to change:

> static const struct dvb_frontend_ops stb0899_ops = {
>         .delsys = { SYS_DVBS, SYS_DVBS2, SYS_DSS },
>         .info = {
>                 .name                   = "STB0899 Multistandard",
>                 .frequency_min_hz       =  950 * MHz,
>                 .frequency_max_hz       = 2150 * MHz,
>                 .symbol_rate_min        =   500000,
^^^ this value
>                 .symbol_rate_max        = 45000000,

But no luck.

--HPS