[Bluez-devel] SCO for non-CSR based devices?

[Bluez-devel] SCO for non-CSR based devices?

[Gerhard Killesreiter]

Hi there!

I've recently purchased a bluetooth headset and discovered that my 
bluetooth adapter (a pcmcia card, 
http://www.sphinx-elektronik.de/deutsch/bluetooth/picocard.htm) isn't 
supported by bluetooth-alsa as there is no SCO support for this type of 
device.

During my searches on the web I noticed a kernel patch that was recently 
posted to this list 
(http://article.gmane.org/gmane.linux.bluez.devel/7579). I had a look 
and indeed my card has the problem which is mentioned there, namely it 
displays SCO MTU: 64:0 (Complete output of hciconf -a is at the end of 
this mail).

Now my question is: Would this kernel patch potentially allow me to use 
my card with bluetooth-alsa? Or is the actual problem unrelated? I am 
willing to recompile my kernel and apply this patch or test others, but 
I am really no kernel hacker and so I'd appreciate some input.

Of course, I could simply go and buy a CSR based bluetooth adapter, but 
that's boring. ;)

Cheers,
    Gerhard


hci0:   Type: PCCARD
        BD Address: 00:80:37:15:74:E6 ACL MTU: 672:10 SCO MTU: 64:0
        UP RUNNING PSCAN ISCAN
        RX bytes:125 acl:0 sco:0 events:15 errors:0
        TX bytes:322 acl:0 sco:0 commands:14 errors:0
        Features: 0x07 0xea 0x31 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'theo-dhcp-42-0'
        Class: 0x100100
        Service Classes:
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0xb LMP Ver: 1.1 (0x1) LMP Subver: 0x300
        Manufacturer: Ericsson Technology Licensing (0)



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Re: [Bluez-devel] SCO for non-CSR based devices?

[Brad Midgley]

Gerhard

> I've recently purchased a bluetooth headset and discovered that my
> bluetooth adapter (a pcmcia card,
> http://www.sphinx-elektronik.de/deutsch/bluetooth/picocard.htm) isn't
> supported by bluetooth-alsa as there is no SCO support for this type of
> device.
> 
> During my searches on the web I noticed a kernel patch that was recently
> posted to this list
> (http://article.gmane.org/gmane.linux.bluez.devel/7579).

I think the patch you linked to is a quirk that is only employed if a
specific adapter is found and currently that list only has one adapter
in the list to watch.

The mtu fix will be applied regarless of the adapter if you use
http://bluetooth-alsa.sourceforge.net/sco-mtu.patch

If Marcel accepts the first approach upstream and the mtu fix really
works for you, we'll need to find out how to get the quirk to apply for
your adapter.

Brad


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Re: [Bluez-devel] SCO for non-CSR based devices?

[Peter Wippich]

Hi Gerhard,

I'm sorry to tell you that with the Sphinx card SCO is not supported at 
all. It uses one of the first available Ericson BT Moduls and this modul 
does not support SCO over H4.

Ciao, 

Petr 

On Thu, 11 May 2006, Brad Midgley wrote:

> Gerhard
> 
> > I've recently purchased a bluetooth headset and discovered that my
> > bluetooth adapter (a pcmcia card,
> > http://www.sphinx-elektronik.de/deutsch/bluetooth/picocard.htm) isn't
> > supported by bluetooth-alsa as there is no SCO support for this type of
> > device.
> > 
> > During my searches on the web I noticed a kernel patch that was recently
> > posted to this list
> > (http://article.gmane.org/gmane.linux.bluez.devel/7579).
> 
> I think the patch you linked to is a quirk that is only employed if a
> specific adapter is found and currently that list only has one adapter
> in the list to watch.
> 
> The mtu fix will be applied regarless of the adapter if you use
> http://bluetooth-alsa.sourceforge.net/sco-mtu.patch
> 
> If Marcel accepts the first approach upstream and the mtu fix really
> works for you, we'll need to find out how to get the quirk to apply for
> your adapter.
> 
> Brad
> 
> 
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> _______________________________________________
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> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
> 


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Re: [Bluez-devel] SCO for non-CSR based devices?

[Gerhard Killesreiter]

Peter Wippich wrote:

Hi Peter!

> I'm sorry to tell you that with the Sphinx card SCO is not supported at 
> all. It uses one of the first available Ericson BT Moduls and this modul 
> does not support SCO over H4.
>   

Too bad, but thanks for the info! Guess I'll just buy a CSR USB-stick, then.

Cheers,
    Gerhard


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[Bluez-devel] documentation for a newbie

[Özkan Gümüs]

Hi all,

i'm a Ubuntu user and i use blueZ stack for Bluetooth, i hava successfuly 
downloaded libbluetooth1-dev and bluez-utils,  i started to find some codes 
in C and try to examine them. But is there any doc which is about the 
functions provided by libbluetooth1-dev and bluez-utils ? A list of 
functions or something more detailed...

thanks,


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Re: [Bluez-devel] documentation for a newbie

[Jan Benes]

Hi,
there's no documentation available AFAIK except for
http://people.csail.mit.edu/albert/bluez-intro/index.html which is a
site that deals with some of the stuff (look at the PDF for a bit more
detailed explanation). Otherwise than that, you'd have to stick with
figuring out yourself from the the code.

PS: some documentation for the obex profiles is available at
openobex.org -> for developers -> documentation (at the bottom of the
page)

On 5/11/06, =D6zkan G=FCm=FCs <ozkan_gumus@hotmail.com> wrote:
> Hi all,
>
> i'm a Ubuntu user and i use blueZ stack for Bluetooth, i hava successfuly
> downloaded libbluetooth1-dev and bluez-utils,  i started to find some cod=
es
> in C and try to examine them. But is there any doc which is about the
> functions provided by libbluetooth1-dev and bluez-utils ? A list of
> functions or something more detailed...
>
> thanks,
>
>
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=3D121642
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>


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broadcom in disguise... (was: [Bluez-devel] SCO for non-CSR based devices?)

[Gerhard Killesreiter]

Gerhard Killesreiter wrote:
> Peter Wippich wrote:
>
>
>> I'm sorry to tell you that with the Sphinx card SCO is not supported 
>> at all. It uses one of the first available Ericson BT Moduls and this 
>> modul does not support SCO over H4.
>>   
>
> Too bad, but thanks for the info! Guess I'll just buy a CSR USB-stick, 
> then.

I went to town and did just that. I ended up buying a Typhoon bluetooth 
usb adapter (http://www.typhoon.de/de/art.php?p=838&pv=3). I had the 
clerk check out the webpage for me and there we found "Functions: Main 
chip - CSR BlueCore ". That's why I bought it and didn't check out th 
other available devices (only one).

Today I tried to get it to work...

theo-dhcp-42:/usr/src/linux# hciconfig -a       
hci0:   Type: USB
        BD Address: 00:10:60:AD:C2:C1 ACL MTU: 377:10 SCO MTU: 64:8

I already applied the MTU patch.

        UP RUNNING PSCAN ISCAN
        RX bytes:2697 acl:88 sco:0 events:144 errors:0
        TX bytes:2211 acl:86 sco:0 commands:46 errors:0
        Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'theo-dhcp-42-0'
        Class: 0x100100
        Service Classes:
        Device Class: Computer, Uncategorized
        HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
        Manufacturer: Broadcom Corporation (15)
                                  ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

Maybe they changed the internals of the device in the revision I bought...


Setting volume and connection does work just fine, but no sound only 
some white noise. Now I can try to bring it back (might be difficult 
since the package is opened) or try to get it to work. I've looked 
through the archives and it doesn't look too good. Are there any news on 
this?


There is a pecularity I'd like to understand: When I use alsamixer to 
set the sound level, there are four settings: Master, Mic, AGC, 
Loopback. I can modify the first two, btu the other ones are disabled. 
What are they? Are they related to the problem?

When I use aplay to try to play a sound, it hangs after writing out the 
version info. Strace gives:

write(2, "  stop_threshold   : 8001\n", 26  stop_threshold   : 8001
) = 26
write(2, "  silence_threshold: 0\n", 23  silence_threshold: 0
) = 23
write(2, "  silence_size : 0\n", 19  silence_size : 0
)    = 19
write(2, "  boundary     : 2097414144\n", 28  boundary     : 2097414144
) = 28
read(3, "\0\0\377\377\2\0\375\377\10\0\361\377\n\0\310\377\17\0"..., 
22048) = 22048
read(3, "=\374E\375u\374\253\374\325\374\177\374\17\375\371\374"..., 
22048) = 22048
read(3, "\213\376\316\375\236\376\234\376\211\376\315\377,\376I"..., 
22048) = 22048
read(3, "\320\374!\375\34\3762\375\303\376\231\374L\375\333\372"..., 
22048) = 22048
ioctl(4, 0x4142, 0xb7f02b90)            = 0
read(3, "\v\376l\367\227\374\327\366\372\373\356\365\333\373\26"..., 
22048) = 22048
ioctl(4, 0x4122, 0xb7f02b90)            = 0
poll(


And there it sits doing nothing.


Cheers,
    Gerhard


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[Bluez-devel] Re: broadcom in disguise...

[Brad Midgley]

Gerhard

> I went to town and did just that. I ended up buying a Typhoon bluetooth
> usb adapter (http://www.typhoon.de/de/art.php?p=838&pv=3). I had the
> clerk check out the webpage for me and there we found "Functions: Main
> chip - CSR BlueCore ". That's why I bought it and didn't check out th
> other available devices (only one).

A couple of manufacturers switched from csr to broadcom around the time
bluecore4 and the other edr chips came out. Not sure why.

The mtu workaround is the only way we've had any success using broadcom
but it only works with some chips. If you've used the adapter in windows
for sco audio then it might change some nvram settings. I'm not familiar
enough with the lower layers to suggest anything else.

Brad


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Re: [Bluez-devel] Re: broadcom in disguise...

[Gerhard Killesreiter]

Brad Midgley wrote:
>> I went to town and did just that. I ended up buying a Typhoon bluetooth
>> usb adapter (http://www.typhoon.de/de/art.php?p=838&pv=3). I had the
>> clerk check out the webpage for me and there we found "Functions: Main
>> chip - CSR BlueCore ". That's why I bought it and didn't check out th
>> other available devices (only one).
>>     
>
> A couple of manufacturers switched from csr to broadcom around the time
> bluecore4 and the other edr chips came out. Not sure why.
>   

I find this highly annoying. I have written to typhoon and asked for an 
explanation.

> The mtu workaround is the only way we've had any success using broadcom
> but it only works with some chips.

Is there a way to determine exactly which chip I have?

>  If you've used the adapter in windows
> for sco audio

This should be possible according to the manual.

>  then it might change some nvram settings.

I am going to try a lot of things to get it running, but not installing 
windows. I might be able to persuade a friend with a windows pc to run 
some tests for me, though, if you can give me some pointer to where to 
look for these settings. Can't these be changed from Linux?


>  I'm not familiar
> enough with the lower layers to suggest anything else.
>   

Your support is apprecriated.

Cheers,
    Gerhard




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Re: [Bluez-devel] Re: broadcom in disguise...

[Brad Midgley]

Gerhard

>> A couple of manufacturers switched from csr to broadcom around the time
>> bluecore4 and the other edr chips came out. Not sure why.
>>   
> I find this highly annoying. I have written to typhoon and asked for an
> explanation.

this is unfortunately a fairly standard practice across the computer
hardware industry.

bluetake has done the switcheroo as well but currently their BT007EX is
our only source for a class 1 bluecore4 dongle so we like them again.

>>  If you've used the adapter in windows
>> for sco audio
>>  then it might change some nvram settings.

I really don't know much about the broadcom models or even if they do
have nvram settings for this. It's possible they ship something that
can't do sco out of the box but will do it after the windows driver
initializes it. That's my "all out of ideas" suggestion.

Brad



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Re: [Bluez-devel] Re: broadcom in disguise...

[Gerhard Killesreiter]

Brad Midgley wrote:

Hi Brad!

>>> A couple of manufacturers switched from csr to broadcom around the time
>>> bluecore4 and the other edr chips came out. Not sure why.
>>>   
>>>       
>> I find this highly annoying. I have written to typhoon and asked for an
>> explanation.
>>     
>
> this is unfortunately a fairly standard practice across the computer
> hardware industry.
>   

If they'd at least update their docs...

Anyway, I got an anwer from them (didn't really expect one)!

They claim that the chip can be addressed by the broadcom driver but 
would definitly be a CSR chip.

Does that make any sense to anybody?




> bluetake has done the switcheroo as well but currently their BT007EX is
> our only source for a class 1 bluecore4 dongle so we like them again.
>
>   
>>>  If you've used the adapter in windows
>>> for sco audio
>>>  then it might change some nvram settings.
>>>       
>
> I really don't know much about the broadcom models or even if they do
> have nvram settings for this. It's possible they ship something that
> can't do sco out of the box but will do it after the windows driver
> initializes it. That's my "all out of ideas" suggestion.
>   

Guess I will need to take it to a windows box then.

Cheers,
    Gerhard


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Re: [Bluez-devel] broadcom in disguise...

[Brad Midgley]

Gerhard

> They claim that the chip can be addressed by the broadcom driver but
> would definitly be a CSR chip.
> 
> Does that make any sense to anybody?

no sense whatsoever.

brad


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Re: [Bluez-devel] broadcom in disguise...

[Gerhard Killesreiter]

Brad Midgley wrote:

Hi Brad!

>> They claim that the chip can be addressed by the broadcom driver but
>> would definitly be a CSR chip.
>>
>> Does that make any sense to anybody?
>>     
>
> no sense whatsoever.
>
>   

Yeah, this is what I thought too. I've replied to them, copying the 
lsusb info and they confirmed that they don't use the CSR-Chip anymore 
and will change the info on their internet page, typhoon.de.

So I can only hope the vendor takes the thing back.

Cheers,
    Gerhard


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