bttv bug with ImpactVCB #64405

The Hauppauge ImpactVCB #64405 is a 4 channel 878A-based video capture board with no tuner, 3 RCA composite inputs, and an S-Video input.

Lucid Lynx and the past several releases of the bttv driver have a bug where this board does not fully work as auto-detected.

Because this board has the same PCI ID [0070:13eb] that the WinTV series of cards uses, the bttv driver auto-detects it as a WinTV board (card=10), and uses the MUXSEL settings: MUXSEL(2, 0, 1,1)

When these MUXSEL values are used for a 4-channel board, it means that one of the 878's inputs cannot not be selected, because a mux setting of 3 is not possible. In the case of the ImpactVCB #64405, the result is that one of the composite inputs cannot be selected, and a degraded echo of the S-Video input (if present) will be selected instead.

There is a work-around. The commands

    sudo modprobe -r bttv

    sudo modprobe bttv card=82

will treat this board as an Osprey 100/150, which is a functional equivalent.

However, this work-around has the following drawbacks:

1) It requires manual intervention.

2) It is non-intuitive, and requires user research to discover.

3) The composite channels are ordered differently than under Hauppauge's WinTV2000 app, which means that composite channels would move around on a dual-boot Windows/Ubuntu system.

Proposed Solution:

The bttv source code has already solved a similar problem for another ImpactVCB variant, the #64900, which has 4 BNC connections, and no S-Video.

A new card type was defined (BTTV_BOARD_HAUPPAUGE_IMPACTVCB), and an appropriate struct tvcard entry was created.

Then the hauppauge_eeprom() routine was modified to switch over to the alternate BTTV_BOARD_HAUPPAUGE_IMPACTVCB entry when both the following conditions are met:

1) The board is originally auto-detected as a BTTV_BOARD_HAUPPAUGE878 card.

2) The tv.model read from the EEPROM is 64900.

My proposed solution is to simply extend this approach to the #64405 variant.

The attached code is a modification of 2.6.35 source code, which has been back-ported for testing against a 2.6.32 kernel.
It defines a new card type, BTTV_BOARD_HAUPPAUGE_IMPACTVCB_64405, and modifies the hauppauge_eeprom() routine to use a new struct tvcard entry when:

1) The board is originally auto-detected as a BTTV_BOARD_HAUPPAUGE878 card.

2) The tv.model read from the EEPROM is 64405.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.42
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: htpc 1146 F.... pulseaudio
 /dev/snd/controlC1: htpc 1146 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xdfffc000 irq 16'
   Mixer name : 'Analog Devices AD1983'
   Components : 'HDA:11d41983,102801e5,00100400'
   Controls : 26
   Simple ctrls : 15
Card1.Amixer.info:
 Card hw:1 'Bt878'/'Brooktree Bt878 at 0xd8000000, irq 22'
   Mixer name : 'Bt87x'
   Components : ''
   Controls : 3
   Simple ctrls : 5
Date: Thu Sep 16 15:30:01 2010
HibernationDevice: RESUME=UUID=cfd1b218-fe5e-4625-b3a0-a3696d25348f
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Dell Inc. OptiPlex 320
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=ed895a73-881a-4b59-a9ea-b944d6bb11ca ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:

SourcePackage: linux
dmi.bios.date: 06/17/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.12
dmi.board.name: 0TY915
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.1.12:bd06/17/2009:svnDellInc.:pnOptiPlex320:pvr:rvnDellInc.:rn0TY915:rvr:cvnDellInc.:ct7:cvr:
dmi.product.name: OptiPlex 320
dmi.sys.vendor: Dell Inc.