DVB support for MSI DigiVox A/D II and KWorld 320U

Hello

I have KWorld 320U USB DVT-T Hybrid and trying to get DVB part working. The code from mcentral worked pretty well but as it is closed down now I would like to contribute to linux-media and enable and validate the hardware support for this device.

I have:

Linux 2.6.28-15-generic x86_64 GNU/Linux
Bus 001 Device 002: ID eb1a:e320 eMPIA Technology, Inc.

This device has the same id with "MSI DigiVox A/D II" but I guess it shouldn't matter because it appears to be exactly the same thing just with the different brand label with Zarlink ZL10353 DVB-T on both boards.

I have downloaded the code from v4l-dvb and commented out the "#if 0" around the device dvb definition ( em28xx-cards.c ), also added it to frontend registration ( em28xx-dvb.c) the same as KWorld 310 - just a normal Zarlink attach function.

The trouble is that I get an error:

zl10353_read_register: readreg error (reg=127, ret==-19)

and I cannot understand why. I have the mcentral code still lying around and comparing those codes doesn't seem to have any difference. Maybe there still is a magic bit somewhere to set?

Otherwise the device is recognized correctly:

[   34.704863] em28xx #0: chip ID is em2882/em2883
[   34.863889] em28xx #0: i2c eeprom 00: 1a eb 67 95 1a eb 20 e3 d0 12 5c 00 6a 22 00 00
[   34.863898] em28xx #0: i2c eeprom 10: 00 00 04 57 4e 07 00 00 00 00 00 00 00 00 00 00
[   34.863906] em28xx #0: i2c eeprom 20: 46 00 01 00 f0 10 01 00 00 00 00 00 5b 1e 00 00
[   34.863913] em28xx #0: i2c eeprom 30: 00 00 20 40 20 80 02 20 01 01 00 00 00 00 00 00
[   34.863920] em28xx #0: i2c eeprom 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863927] em28xx #0: i2c eeprom 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863933] em28xx #0: i2c eeprom 60: 00 00 00 00 00 00 00 00 00 00 22 03 55 00 53 00
[   34.863940] em28xx #0: i2c eeprom 70: 42 00 20 00 32 00 38 00 38 00 31 00 20 00 44 00
[   34.863947] em28xx #0: i2c eeprom 80: 65 00 76 00 69 00 63 00 65 00 00 00 00 00 00 00
[   34.863954] em28xx #0: i2c eeprom 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863960] em28xx #0: i2c eeprom a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863967] em28xx #0: i2c eeprom b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863974] em28xx #0: i2c eeprom c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863981] em28xx #0: i2c eeprom d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863987] em28xx #0: i2c eeprom e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.863994] em28xx #0: i2c eeprom f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.864002] em28xx #0: EEPROM ID= 0x9567eb1a, EEPROM hash = 0x74913442
[   34.864004] em28xx #0: EEPROM info:
[   34.864005] em28xx #0:       AC97 audio (5 sample rates)
[   34.864007] em28xx #0:       500mA max power
[   34.864009] em28xx #0:       Table at 0x04, strings=0x226a, 0x0000, 0x0000
[   34.864012] em28xx #0: Identified as MSI DigiVox A/D II (card=50)

Regards
Lauri

In em28xx-dvb.c, try using "em28xx_zl10353_with_xc3028_no_i2c_gate" in the dvb_attach() instead of "em28xx_zl10353_with_xc3028". Alternatively, move the case line for your board further down so it's the same as "EM2882_BOARD_TERRATEC_HYBRID_XS" instead of being the same as "EM2880_BOARD_KWORLD_DVB_310U"

Devin

Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Hello

Tried that but the result is basically the same: "zl10353_attach" gives

[  491.490259] zl10353_read_register: readreg error (reg=127, ret==-19)

And it is funny that if I compile the mcentral latest code in the same kernel, it works, but I cannot find the difference in the code :)

Lauri

Check the dvb_gpio setting in the board profile. On some of those boards you need to take put one of the GPO pins high to take the demod out of reset. The KWorld 315u and 330u are both like that.

Devin

Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com