How would one go about making a dongle supported in Linux? Especially
with regard to SCO audio.
Any pointers to what is needed and to places in the bluetooth code are
welcome.
I have this dongle (its name: "Mars II, MII-792") which can establish
rfcomm connections et al, but cannot transmit or receive audio:
# hciconfig hci0 revision
hci0: Type: USB
BD Address: 00:11:F6:01:5F:56 ACL MTU: 120:20 SCO MTU: 64:0
Unsupported manufacturer
hci0: Type: USB
BD Address: 00:11:F6:01:5F:56 ACL MTU: 120:20 SCO MTU: 64:0
UP RUNNING PSCAN ISCAN
RX bytes:366 acl:0 sco:0 events:39 errors:0
TX bytes:485 acl:0 sco:0 commands:24 errors:0
Features: 0xff 0xff 0x05 0x38 0x18 0x18 0x00 0x00
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'null'
Class: 0x3e0100
Service Classes: Networking, Rendering, Capturing
Device Class: Computer, Uncategorized
HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver:
0x757
Manufacturer: Silicon Wave (11)
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(unk. ) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0c10 ProdID=0000 Rev=15.00
S: Manufacturer=SiW
S: Product=SiW
S: SerialNumber=565F01F61100
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr= 50mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
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Alexandros
>>SCO will be routed through the PCM hardware on your silicon wave chip
>>but that PCM interface is not connected to anything in a usb dongle.
>
> Voice audio works perfectly in Windows XP, though.
Ok, then they must have a way to route audio through the hci connection.
> Is it a case such as the one with winmodems, in that software is doing
> the voice routing?
I don't think it's like that. I think I've seen Marcel complain about
silicon wave not working with him on specs/drivers.
> Or would these (cheap, admittedly, I got mine for 15 euros) dongles need
> some sort of (difficult) reverse engineering to pass through the audio?
Everything is cheap these days. I saw a CSR class 1 bt1.2 usb dongle for
us$10 shipped the other day.
> I don't particulary like this TODO item:
>
> - Find out if SCO can be mapped to HCI as it can on CSR (*no*)
yeah, I traded email with the infineon tech guy who gumstix works
through. He danced around this question but I think it's because they
don't have a way to do it.
Brad
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Brad Midgley wrote:
> It seems that hci routing of sco audio is only available on CSR chips.
>
> SCO will be routed through the PCM hardware on your silicon wave chip
> but that PCM interface is not connected to anything in a usb dongle.
Voice audio works perfectly in Windows XP, though.
Is it a case such as the one with winmodems, in that software is doing
the voice routing?
Or would these (cheap, admittedly, I got mine for 15 euros) dongles need
some sort of (difficult) reverse engineering to pass through the audio?
Just wondering. :)
> I have the same problem with the builtin infineon bluetooth on gumstix
> (see http://bluetooth-alsa.sf.net/embed.html for more)
I don't particulary like this TODO item:
- Find out if SCO can be mapped to HCI as it can on CSR (*no*)
:-D
Thanks,
Alexandros
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Alexandros
It seems that hci routing of sco audio is only available on CSR chips.
SCO will be routed through the PCM hardware on your silicon wave chip
but that PCM interface is not connected to anything in a usb dongle.
I have the same problem with the builtin infineon bluetooth on gumstix
(see http://bluetooth-alsa.sf.net/embed.html for more)
Brad
Alexandros Vellis wrote:
> How would one go about making a dongle supported in Linux? Especially
> with regard to SCO audio.
>
> Any pointers to what is needed and to places in the bluetooth code are
> welcome.
>
> I have this dongle (its name: "Mars II, MII-792") which can establish
> rfcomm connections et al, but cannot transmit or receive audio:
>
>
> # hciconfig hci0 revision
> hci0: Type: USB
> BD Address: 00:11:F6:01:5F:56 ACL MTU: 120:20 SCO MTU: 64:0
> Unsupported manufacturer
>
>
>
> hci0: Type: USB
> BD Address: 00:11:F6:01:5F:56 ACL MTU: 120:20 SCO MTU: 64:0
> UP RUNNING PSCAN ISCAN
> RX bytes:366 acl:0 sco:0 events:39 errors:0
> TX bytes:485 acl:0 sco:0 commands:24 errors:0
> Features: 0xff 0xff 0x05 0x38 0x18 0x18 0x00 0x00
> Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
> Link policy: RSWITCH HOLD SNIFF PARK
> Link mode: SLAVE ACCEPT
> Name: 'null'
> Class: 0x3e0100
> Service Classes: Networking, Rendering, Capturing
> Device Class: Computer, Uncategorized
> HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver:
> 0x757
> Manufacturer: Silicon Wave (11)
>
>
>
>
> T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
> D: Ver= 1.10 Cls=e0(unk. ) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
> P: Vendor=0c10 ProdID=0000 Rev=15.00
> S: Manufacturer=SiW
> S: Product=SiW
> S: SerialNumber=565F01F61100
> C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr= 50mA
> I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
> E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
> I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
> I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
> I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
> I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
> I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
>
>
>
>
>
>
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