Em28xx devices

This article discusses some USB interface chipset families produced by EMPIA, and, in addition, addresses the driver that support these chips.

em2800/em2820/em2821/em2840

• used on older analog only device designs. These chips have support for USB Audio Class; so, audio module is snd-usb-audio

em2820/em2840 based devices

• Em2820/gadmei utv 310
  • Em2820:Talk
• Pinnacle_PCTV_USB2
• Em2820/pinnacle
• Em2820/vgear

em2880/2881/2883

• supports DVB/ATSC. Doesn't provide USB Audio Class. Instead, digital audio is provided via an USB Vendor Class; so, these chips require the em28xx-alsa module for digital audio to work.

em2880 based devices

• KWorld 350U DVB-T
• KWorld 310U
• KWorld USB2800
• Em2880/PinnaclePCTV
• Videology 20K14XUSB webcam

Some Misc stuff

The following needs to be cleaned up and/or integrated into the article:

• Em2880/Eeproms
• Em2880/Todo
• Em2880/remote

em2750

• Seem to be used by some Webcams.

Driver

Development -- originally mrec, then he forked. in kernel xc3028 driver based on mrec's original work.

Feature Support

• in-kernel em28xx driver: radio and analog TV (including broadcast audio) are working fine. Support for DVB/ATSC is not present yet.
• no firmware is required for em28xx ICs ... note: though em28xx based devices paired with some tuners will need firmware for the tuner (i.e. there are em28xx based devices paired with a Xceive xc3028, which require a generic firmware from Xceive).

External Links

• EMPIA EM2880 product page
• EMPIA EM2820/EM2840 product page
• EMPIA EM2750 product page
• mcentral.de wiki offers alternative, out of kernel, drivers for some em28xx based devices:
  • mrec's page on the em2880 ... note: that the information seems heavily tied to devices which utilise a xceive xc3028 tuner ... hence you may also want to read his xc3028 page for related info
  • mrec's page on the em2820