[Bluez-devel] snd-bt-sco

[Bluez-devel] snd-bt-sco

[Peter Favrholdt]

Hi bluez developers,

I'm not sure if this is the right forum. I'm probably in-between alsa-user, 
bluez-user, kernel-user? But here goes anyway:-)

I just tried getting the Logitech HS01 bluetooth headset working on kernel 
2.6.6 (debian unstable), using the ALSA driver from 
http://www.dcs.gla.ac.uk/~jp/snd-bt-sco/

Anyone had success with getting a headset working?

I know this driver is a hack, but it would be cool to have skype working using 
a headset under linux.

BR

Peter

--- cut: long and windy story about my adventures ---

I think I managed to patch my kernel-source-2.6.6 successfully. After 
modprobing the modules dmesg says:

Bluetooth: L2CAP ver 2.1
Bluetooth: L2CAP socket layer initialized
Bluetooth: RFCOMM ver 1.2
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: SCO (Voice Link) ver 0.3
Bluetooth: SCO socket layer initialized
Bluetooth: HCI USB driver ver 2.5
usbcore: registered new driver hci_usb
snd-bt-sco revision ??$
snd-bt-sco: snd-bt-scod thread starting

so far so good.

After a while I got this additional message:

hci_acldata_packet: hci0 ACL packet for unknown connection handle 1

here is a summary of what I did:

modprobe hci_usb
modprobe sco
invoke-rc.d bluez-utils restart

Here I turned on the headset in this special "reset/pairing mode" (don't know 
the right name for it - but you hold down the button for 10 seconds).

hcitool scan
Scanning ...
         00:0D:44:00:76:07       Logitech HS01

hcitool cc 00:0D:44:00:76:07 (I think I had to enter pin here)

hciconfig hci0 voice 0x0040

modprobe snd-bt-sco
sdptool search --bdaddr 00:0D:44:00:76:07 0x1108
snd-bt-sco-2004-03-14/btsco-0.2/btsco 00:0D:44:00:76:07 1
Error: control open (hw:0): No such file or directory
Error: Can't find device. Bail

So that was end of the game.


At this time hcitool con says:
Connections:
         > ACL 00:0D:44:00:76:07 handle 1 state 1 lm SLAVE

But I've also had it say:
         < ACL 00:0D:44:00:76:07 handle 1 state 1 lm MASTER

Using strace I get this:

strace btsco-0.2/btsco 00:0D:44:00:76:07 1

futex(0x400fbffc, FUTEX_WAKE, 2147483647) = 0
access("/etc/asound.conf", R_OK)        = -1 ENOENT (No such file or directory)
access("/root/.asoundrc", R_OK)         = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/dev/aloadC0", O_RDONLY)          = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDWR)      = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/dev/aloadC0", O_RDONLY)          = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDWR)      = -1 ENOENT (No such file or directory)
write(2, "Error: ", 7Error: )                  = 7
write(2, "control open (hw:0): No such fil"..., 46control open (hw:0): No such 
file or directory) = 46
write(2, "\n", 1
)                       = 1
write(2, "Error: ", 7Error: )                  = 7
write(2, "Can\'t find device. Bail", 23Can't find device. Bail) = 23
write(2, "\n", 1
)                       = 1
exit_group(1)                           = ?

This could be caused by missing device files in /dev/ maybe?

I have ALSA compiled statically into the kernel, here is what dmesg says:
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30 08:19:30 
2004 UTC).
ALSA device list:
   #0: C-Media PCI CMI8738 (model 37) at 0xc400, irq 10


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Re: [Bluez-devel] snd-bt-sco

[Peter Favrholdt]

Hi again,

Well, I figured out I didn't have the /dev/snd/* device files

So now it almost works. The headset seems connected. I can use alsamixer (and 
the volume buttons on the headset changes the volume in the mixer window). 
hciconfig shows data is flowing at a steady rate from the microphone:

hci0:   Type: USB
         BD Address: 00:0B:0D:20:79:21 ACL MTU: 339:4  SCO MTU: 64:0
         UP RUNNING PSCAN ISCAN
         RX bytes:8895374 acl:72 sco:329395 events:232 errors:0
         TX bytes:3768 acl:151 sco:0 commands:47 errors:0

But no sound

I'll try some more.

BR

Peter

Peter Favrholdt wrote:
> Hi bluez developers,
> 
> I'm not sure if this is the right forum. I'm probably in-between 
> alsa-user, bluez-user, kernel-user? But here goes anyway:-)
> 
> I just tried getting the Logitech HS01 bluetooth headset working on 
> kernel 2.6.6 (debian unstable), using the ALSA driver from 
> http://www.dcs.gla.ac.uk/~jp/snd-bt-sco/
> 
> Anyone had success with getting a headset working?
> 
> I know this driver is a hack, but it would be cool to have skype working 
> using a headset under linux.
> 
> BR
> 
> Peter
> 
> --- cut: long and windy story about my adventures ---
<snip>


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Re: [Bluez-devel] snd-bt-sco

[Marcel Holtmann]

Hi Peter,

> Well, I figured out I didn't have the /dev/snd/* device files
> 
> So now it almost works. The headset seems connected. I can use alsamixer (and 
> the volume buttons on the headset changes the volume in the mixer window). 
> hciconfig shows data is flowing at a steady rate from the microphone:
> 
> hci0:   Type: USB
>          BD Address: 00:0B:0D:20:79:21 ACL MTU: 339:4  SCO MTU: 64:0
>          UP RUNNING PSCAN ISCAN
>          RX bytes:8895374 acl:72 sco:329395 events:232 errors:0
>          TX bytes:3768 acl:151 sco:0 commands:47 errors:0
> 
> But no sound

and I am not sure that your USB dongle supports SCO over HCI. Show us
the output of "hciconfig -a" and "cat /proc/bus/usb/devices".

Regards

Marcel




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Re: [Bluez-devel] snd-bt-sco

[Peter Favrholdt]

Hi Marcel,

Thank you very much for the reply. I have included the information you 
requested at the bottom. First a little more information that might help you 
help me :-)

When I start the user space "btsco" program the headset goes "off the hook" - 
I hear a beep, the led starts blinking three blinks at a time, and I can hear 
some "static" noise (mostly silent but occasionally some lsb "clicks"). I take 
this as a good sign since it was mentioned in the readme for the snd-bt-sco 
package:
"There seems to be some unexplained noise that's noticeable when a program has
the device open but is not sending audio data. Instead of seeing all silence,
the driver is receiving the occasional non-zero byte. I've added a temporary
filter to eliminate this, but I'd really like to know what's causing it."

As I said earlier, the buttons on the headset works - I can disconnect and 
change the volume (can be seen in alsamixer :-)

dmesg has lots of these messages. Sometimes the number following handle is not 
zero but a "random" integer.
hci_scodata_packet: hci0 SCO packet for unknown connection handle 0
hci_scodata_packet: hci0 SCO packet for unknown connection handle 0
hci_scodata_packet: hci0 SCO packet for unknown connection handle 0
hci_scodata_packet: hci0 SCO packet for unknown connection handle 0
hci_scodata_packet: hci0 SCO packet for unknown connection handle 0

Besides adding the snd-bt-sco alsa driver to the kernel tree, I have patched 
the hci_usb.c of the 2.6.6 kernel with this patch (which was meant for 2.6.4):

<patch>
--- linux-2.6.4-orig/drivers/bluetooth/hci_usb.c 2004-03-11 02:55:44
+++ linux-2.6.4/drivers/bluetooth/hci_usb.c     2004-03-13 23:52:27
@@ -851,7 +851,12 @@

#ifdef CONFIG_BT_HCIUSB_SCO
                   case USB_ENDPOINT_XFER_ISOC:
-                        if (ep->desc.wMaxPacketSize < size || a > 2)
+                        /* Use only the 9 byte
+                           "One voice channel with 8 bit encoding"
+                           endpoint until there is support for changing
+                           the endpoint dynamically. See
+                           Bluetooth 1.1 Part H:2, section 2.1 */
+                        if (ep->desc.wMaxPacketSize != 9)
                                  break;
                          size = ep->desc.wMaxPacketSize;
</patch>

One further note: I had to increment the magic numbers in sndmagic.h because 
the ones in the patch was already used in kernel 2.6.6. I assume this isn't a 
problem as I have compiled both kernel and the btsco program with these 
numbers... but something else might need to be changed also?

After having "used" the headset and turned it off I have trouble getting it 
online again (without rebooting Linux). After putting the headset in "pairing 
mode" I can do "hcitool scan"
Scanning ...
         00:0D:44:00:76:07       Logitech HS01

But it fails with one of two error messages when I try to setup a connection:
hcitool cc 00:0D:44:00:76:07
Can't create connection: Input/output error
or:
Can't create connection: Connection timed out

But still "hcitool con" shows no connections.

Any ideas/suggestions welcome,

BR Peter


Marcel Holtmann wrote:
> and I am not sure that your USB dongle supports SCO over HCI. Show us
> the output of "hciconfig -a" and "cat /proc/bus/usb/devices".

At the moment the headset is not turned on (don't know if that makes a 
difference). Also I noted that sometimes the headset will be master and 
sometimes slave. Not sure what that means though:-)

how4:~# hciconfig -a
hci0:   Type: USB
         BD Address: 00:0B:0D:20:79:21 ACL MTU: 339:4  SCO MTU: 64:0
         UP RUNNING PSCAN ISCAN
         RX bytes:665056950 acl:108 sco:216472402 events:222 errors:0
         TX bytes:2507 acl:87 sco:0 commands:66 errors:0
         Features: 0xff 0xff 0x3d 0x00 0x00 0x00 0x00 0x00
         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
         Link policy: RSWITCH HOLD SNIFF PARK
         Link mode: SLAVE ACCEPT
         Name: 'how4-0.'
         Class: 0x000100
         Service Classes: Unspecified
         Device Class: Computer, Uncategorized
         HCI Ver: 1.1 (0x1) HCI Rev: 0x93 LMP Ver: 1.1 (0x1) LMP Subver: 0x93
         Manufacturer: Transilica, Inc. (24)

how4:~# cat /proc/bus/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=143/900 us (16%), #Int=  2, #Iso=  2
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.6 uhci_hcd
S:  Product=Intel Corp. 82801AA USB
S:  SerialNumber=0000:00:1f.2
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

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=16 #Cfgs=  1
P:  Vendor=0f4d ProdID=1000 Rev= 4.01
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr= 26mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  32 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS=  32 Ivl=0ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=hci_usb
E:  Ad=84(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=05(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms

T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=1.5 MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=046d ProdID=c408 Rev=14.00
S:  Manufacturer=Logitech
S:  Product=USB Trackball
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 50mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=hid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=10ms

[Bluez-devel] snd-bt-sco

[Michael Zanetti]

Hi!

I've got a Logitech HS01 Bluetooth Headset and it works with the Bluetooth 
Alsa drivers except the Mic produces a noise so that recording or Skypeing is 
nearly impossible.

I've installed kernel-2.6.9-gentoo-r9, patched it with the patch on the Bluez 
homepage and installed btsco-cvs-0.2.

Any ideas how to stop that noise?

Thank you all for your great job on this Bluetooth Project!!!

Michael


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Re: [Bluez-devel] snd-bt-sco

[Marcel Holtmann]

Hi Michael,

> I've got a Logitech HS01 Bluetooth Headset and it works with the Bluetooth 
> Alsa drivers except the Mic produces a noise so that recording or Skypeing is 
> nearly impossible.
> 
> I've installed kernel-2.6.9-gentoo-r9, patched it with the patch on the Bluez 
> homepage and installed btsco-cvs-0.2.
> 
> Any ideas how to stop that noise?

actually I have no idea and I don't have any of these headsets for
testing.

> Thank you all for your great job on this Bluetooth Project!!!

You are welcome.

Regards

Marcel




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Re: [Bluez-devel] snd-bt-sco

[Brad Midgley]

Michael,

I don't have any immediate ideas about this... I'm not sure we've had 
anyone using the logitech.

I've updated http://bluetooth-alsa.sf.net with a bunch of things we 
typically ask when people are having trouble.

Brad

Michael Zanetti wrote:
> Hi!
> 
> I've got a Logitech HS01 Bluetooth Headset and it works with the Bluetooth 
> Alsa drivers except the Mic produces a noise so that recording or Skypeing is 
> nearly impossible.
> 
> I've installed kernel-2.6.9-gentoo-r9, patched it with the patch on the Bluez 
> homepage and installed btsco-cvs-0.2.
> 
> Any ideas how to stop that noise?
> 
> Thank you all for your great job on this Bluetooth Project!!!
> 
> Michael
> 
> 
> -------------------------------------------------------
> SF email is sponsored by - The IT Product Guide
> Read honest & candid reviews on hundreds of IT Products from real users.
> Discover which products truly live up to the hype. Start reading now. 
> http://productguide.itmanagersjournal.com/
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel


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Re: [Bluez-devel] snd-bt-sco

[Chris Boyle]

On Thu, Dec 09, 2004 at 03:35:04PM -0700, Brad Midgley wrote:
> I don't have any immediate ideas about this... I'm not sure we've had 
> anyone using the logitech.

This ("Logitech HS01") is the model mine identifies itself as, FWIW.
It's sold as a Logitech Mobile Bluetooth Headset (as distinct from the
"Pro" version currently on their site).

And yes, it is a little noisy around other equipment. I use it sitting
at my PC, where there is a speaker set, two full powerstrips of
equipment, an FM radio receiver, a fan (although not typically switched
on), and a wireless network in the house. It's still just about usable.

-- 
Chris Boyle - http://cmb.is-a-geek.org/
GPG: B7D86E0F, MSN: shortcipher@hotmail.com, ICQ: 24151961,
AIM: kerneloops, Yahoo: kerneloops, IRC: cmb on irc.uwcs.co.uk


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