• Bruno Christo's avatar
    V4L/DVB (10827): Add support for GeoVision GV-800(S) · 0c5db425
    Bruno Christo authored
    I have a GeoVision GV-800(S) card, it has 4 CONEXANT BT878A chips.
    It has 16 video inputs and 4 audio inputs, and it is almost identical
    to the GV-800, as seen on http://bttv-gallery.de .
    The only difference appears to be the analog mux, it has a CD22M3494
    in place of the MT8816AP. The card has a blue PCB, as seen in this
    picture: http://www.gsbr.com.br/imagem/kits/GeoVision%20GV%20800.jpg .
    
    This card wasn't originally supported, and it was detected as
    UNKNOWN/GENERIC. The video inputs weren't working, so I tried
    "forcing" a few cards like the GeoVision GV-600, but there was still
    no video. So I made a patch to support this card, based on the Kodicom
    4400r.
    
    The GV-800(S) is identified as follows:
    
    ...
    02:00.0 Multimedia video controller: Brooktree Corporation Bt878 Video
    Capture (rev 11)
    02:00.1 Multimedia controller: Brooktree Corporation Bt878 Audio
    Capture (rev 11)
    02:04.0 Multimedia video controller: Brooktree Corporation Bt878 Video
    Capture (rev 11)
    02:04.1 Multimedia controller: Brooktree Corporation Bt878 Audio
    Capture (rev 11)
    02:08.0 Multimedia video controller: Brooktree Corporation Bt878 Video
    Capture (rev 11)
    02:08.1 Multimedia controller: Brooktree Corporation Bt878 Audio
    Capture (rev 11)
    02:0c.0 Multimedia video controller: Brooktree Corporation Bt878 Video
    Capture (rev 11)
    02:0c.1 Multimedia controller: Brooktree Corporation Bt878 Audio
    Capture (rev 11)
    
    ...
    02:00.0 0400: 109e:036e (rev 11)
           Subsystem: 800a:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdfff000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
           Kernel modules: bttv
    
    02:00.1 0480: 109e:0878 (rev 11)
           Subsystem: 800a:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdffe000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
    
    02:04.0 0400: 109e:036e (rev 11)
           Subsystem: 800b:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdffd000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
           Kernel modules: bttv
    
    02:04.1 0480: 109e:0878 (rev 11)
           Subsystem: 800b:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdffc000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
    
    02:08.0 0400: 109e:036e (rev 11)
           Subsystem: 800c:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdffb000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
           Kernel modules: bttv
    
    02:08.1 0480: 109e:0878 (rev 11)
           Subsystem: 800c:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdffa000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
    
    02:0c.0 0400: 109e:036e (rev 11)
           Subsystem: 800d:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdff9000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
           Kernel modules: bttv
    
    02:0c.1 0480: 109e:0878 (rev 11)
           Subsystem: 800d:763d
           Flags: bus master, medium devsel, latency 32, IRQ 10
           Memory at cdff8000 (32-bit, prefetchable) [size=4K]
           Capabilities: [44] Vital Product Data <?>
           Capabilities: [4c] Power Management version 2
    
    As you can see, the GV-800(S) card is almost identical to the GV-800
    on bttv-gallery, so this patch might also work for that card. If not,
    only a few changes should be required on the gv800s_write() function.
    
    After this patch, the video inputs work correctly on linux 2.6.24 and
    2.6.27 using the software 'motion'. The input order may seem a little
    odd, but it's the order the original software/driver uses, and I decided
    to keep that order to get the most out of the card.
    
    I tried to get the audio working with the snd-bt87x module, but I only
    get noise from every audio input, even after selecting a different mux
    with alsamixer. Also, after trying to play sound from those sources, I
    randomly get a RISC error about an invalid RISC opcode, and then that
    output stops working. I also can't change the sampling rate when
    recording. Any pointers to adding audio support are welcome.
    Signed-off-by: default avatarBruno Christo <bchristo@inf.ufsm.br>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    0c5db425
CARDLIST.bttv 8.67 KB