MyGica T230C hacking

As DVB-T(1) is phased out in Germany soon, I got me a new DVB-T2 stick. The MyGica T230 is supported under Linux, and has a quite low price (~20€).

Instead of the expected T230, I received a T230C which has silently replaced the T230. The T230C is – although quite similar to the T230 – currently (Linux 4.10rc2) not supported by the mainline kernel.

Compared to the T230, the T230C uses the same Cypress FX2 CY7C68013A USB bridge chip, a Silabs Si2168-D60 demodulator (new revision) and a new tuner chip, Silabs Si2141-A10 (T230 uses a Si2157).

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Beyond the bridge/RF chips, there is an I2C eeprom (FX2 firmware?), two LowPowerSemi adjustable, synchronous DC/DC buck converters (marking LPS A36j1, LP3202?), a 74ACT1G00 NAND gate (marking A00), two 24MHz oscillators and a bunch of passives.

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6 Gedanken zu “MyGica T230C hacking

  1. Francois Alias schreibt:

    Any luck getting this to work on Linux 4.10?
    I’ve tried your provided patches (https://patchwork.linuxtv.org/project/linux-media/list/?submitter=7094), but so far no front-end will attach:
    [ 2.715033] usb 1-1: dvb_usb_v2: found a ‚MyGica Mini DVB-T2 USB Stick T230C‘ in warm state
    [ 2.715074] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
    [ 2.715093] dvbdev: DVB: registering new adapter (MyGica Mini DVB-T2 USB Stick T230C)
    [ 2.745931] usbcore: registered new interface driver dvb_usb_dvbsky
    [ 3.084074] random: crng init done
    [ 552.891607] media: Linux media interface: v0.10

    Thanks!

  2. Francois Alias schreibt:

    Indeed forgot to use all three patches.
    Thanks man! Great work! :D
    Could you also take a look at the older T230 version?
    This is also seems to be broken on Linux 4.10. :/

    • lurchi schreibt:

      I have submitted some fixes for the cxusb driver (which is responsible for the old T230), these were accepted for 4.11-rc1. „[media] cxusb: Use a dma capable buffer also for reading“ should be the one relevant for you.

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