Em28xx devices: Difference between revisions
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=== How to identify my USB vendor/product id? === |
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shell> lsusb |
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Bus 001 Device 004: ID '''eb1a:2821 eMPIA Technology''', Inc. |
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Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub |
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Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub |
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Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub |
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Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub |
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Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br> |
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Device are identified by two hexadecimal:<br> |
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* The '''4 first''' hexadecimal digits are the Vendor ID ('''0b1a = eMPIA'''). |
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* The '''4 last''' hexadecimal digits are the Device ID ('''2821 = Pixelview Prolink PlayTV USB 2.0''') |
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For '''Pixelview Prolink PlayTV USB 2.0''' the numbers are: '''0b1a:2821''' |
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=== How to add my vendor/product id at upstream kernel?=== |
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* Send your board name, lsusb and tests made to [http://www.redhat.com/mailman/listinfo/video4linux-list video4linux mail-list]<br> |
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* Example: |
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From: foobar |
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To: video4linux-list |
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Subject: em28xx: new board id [0b1a:2821]<br> |
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Body:<br> |
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I've made tests with my Pixelview board:<br> |
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Model: Prolink PlayTV USB 2.0 |
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Vendor/Product id: [0b1a:2821].<br> |
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Tests made: <br> |
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- Analog [Worked] |
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- ... [Worked] |
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- ... [Worked]<br> |
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~foobar<br> |
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Otherwise, if you had any issue, please contact [http://www.redhat.com/mailman/listinfo/video4linux-list video4linux mail-list]. |
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=== How to validate? === |
=== How to validate? === |
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Revision as of 22:18, 6 September 2008
This article discusses some USB interface chipset families produced by EMPIA, and, in addition, addresses the driver that support these chips.
How to compile latest em28xx driver?
Firmware
Information
How to obtain it?
Error: firmware xc3028-v27.fw not found
firmware: requesting xc3028-v27.fw xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
Supported boards
Not validated boards
What's it?
Analog: Boards not validated
| Define | Name | Vendor/Product ID | Status |
|---|---|---|---|
How to identify my USB vendor/product id?
shell> lsusb Bus 001 Device 004: ID eb1a:2821 eMPIA Technology, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device are identified by two hexadecimal:
* The 4 first hexadecimal digits are the Vendor ID (0b1a = eMPIA). * The 4 last hexadecimal digits are the Device ID (2821 = Pixelview Prolink PlayTV USB 2.0) For Pixelview Prolink PlayTV USB 2.0 the numbers are: 0b1a:2821
How to add my vendor/product id at upstream kernel?
- Send your board name, lsusb and tests made to video4linux mail-list
- Example:
From: foobar To: video4linux-list Subject: em28xx: new board id [0b1a:2821]
Body:
I've made tests with my Pixelview board:
Model: Prolink PlayTV USB 2.0 Vendor/Product id: [0b1a:2821].
Tests made:
- Analog [Worked] - ... [Worked] - ... [Worked]
~foobar
Otherwise, if you had any issue, please contact video4linux mail-list.
How to validate?
Some features doesn't work (i.e: audio, dvb, s-video)
About em28xx models
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
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 DVB-T 355U
- KWorld 310U
- KWorld USB2800
- Em2880/PinnaclePCTV
- Videology 20K14XUSB webcam
em2750
- Seem to be used by some Webcams.
Some Misc stuff
The following needs to be cleaned up and/or integrated into the article:
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 or XC2028 tuner, which require a generic firmware from Xceive).
About Driver
- Development -- originally by 4 Ludovico Cavedon, Markus Rechberger, Mauro Carvalho Chehab, Sascha Sommer.
- One of the authors, Markus Rechberger, forked the upstream project.
External Links
- EMPIA EM2880 datasheet
- EMPIA EM2870 datasheet
- 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
Additional Help
Contact video4linux developers at vide4linux-maillist