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Hiddev support

Bluez-devel Olivier Crête 5 participants 9 messages Nov 18, 2006 – Nov 20, 2006 Bluetooth drivers

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Olivier Crête

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#0 lore raw

Hi,

I recently got a logitech mx5000 bluetooth desktop. I got it to work with bluez without too many problems (with the CVS hid2hci). It seems to behave mostly like the bluetooth dinovo. I also want to control the display and use the special keys. But they are carried in hidp input reports of type 3 (what the bluetooth hid spec calls "features"). I looked at the 2.6.18-mh7 patch and it has support for full HID or at least a way to get/send reports from userspace, but it seems that hiddev has been removed from it? Why? Also, can't the HID code just be shared with the USB version since its essentially the same anmd you'd get free hiddev. There are events comments in the HID code saying it should be independant from USB, might be a good occasion to do it.

Also, where is the mh patch from, is there a git tree somewhere? I was gonna try to hook it up with hid/hiddev from usb, but I got lazy seing have the work had already been done.

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Olivier Crête
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#1 lore raw

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i have the same keyboard set, I'd be happy to help you with testing any code you may write for the set. so far there is no way to contorl the screen as far as i know. i pointed someone towards g15deamon etc but i'm not very good at hacking drivers or hardware support (though i did manage to produce the patch for hid2hci for this set)

Quoted 19 lines · Olivier Cr=EAte

Hi,

I recently got a logitech mx5000 bluetooth desktop. I got it to work with bluez without too many problems (with the CVS hid2hci). It seems to behave mostly like the bluetooth dinovo. I also want to control the display and use the special keys. But they are carried in hidp input reports of type 3 (what the bluetooth hid spec calls "features"). I looked at the 2.6.18-mh7 patch and it has support for full HID or at least a way to get/send reports from userspace, but it seems that hiddev has been removed from it? Why? Also, can't the HID code just be shared with the USB version since its essentially the same anmd you'd get free hiddev. There are events comments in the HID code saying it should be independant from USB, might be a good occasion to do it.

Also, where is the mh patch from, is there a git tree somewhere? I was gonna try to hook it up with hid/hiddev from usb, but I got lazy seing have the work had already been done.

Quoted 5 lines

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#2 lore raw
In reply to Olivier Crête

Hi Olivier,

Quoted 11 lines

I recently got a logitech mx5000 bluetooth desktop. I got it to work with bluez without too many problems (with the CVS hid2hci). It seems to behave mostly like the bluetooth dinovo. I also want to control the display and use the special keys. But they are carried in hidp input reports of type 3 (what the bluetooth hid spec calls "features"). I looked at the 2.6.18-mh7 patch and it has support for full HID or at least a way to get/send reports from userspace, but it seems that hiddev has been removed from it? Why? Also, can't the HID code just be shared with the USB version since its essentially the same anmd you'd get free hiddev. There are events comments in the HID code saying it should be independant from USB, might be a good occasion to do it.

this is work in progress and I have seen some nice patches for sharing the HID layer between USB and Bluetooth. We will also have a feature that might be called hidraw to directly access the HID reports. So please stay tuned.

Regards

Marcel

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#3 lore raw

[Bluez-devel] Gumstix / speed setting in Infineon PBA31308

Hi folks.
Does anybody know if rfcomm can now set the baud rate on the new gumstix Infineon PBA31308 module to the 921,600bps needed for SCO audio to work to/from it?

Thanks,
Brian.

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#4 lore raw

Re: [Bluez-devel] Gumstix / speed setting in Infineon PBA31308

Brian

first off: the slower speed should be ok for sco since the audio stream goes direct to the cpu, not through the hci connection. gumstix needs a kernel driver that works with the pcm connection from bluetooth and translates that into a kernel audio device. pcm is connected to gumstix's NSSP i/o (PCM-clock goes to NSSP-clock, PCM-frame goes to NSSP-frame, and PCM-in/out map to the NSSPTXD/TXD)

(it's not relevant, but fyi: rfcomm works at a different level. For higher speeds what we need is for hciattach to negotiate 921k properly. Nobody has worked it out as far as I know. I asked on this list in May and Goetz Issel said he was working on this same chip in an embedded device but I never heard if he got it working.)

Brad

Quoted 9 lines

Hi folks.
Does anybody know if rfcomm can now set the baud rate on the new gumstix Infineon PBA31308 module to the 921,600bps needed for SCO audio to work to/from it?

Thanks,
Brian.

Quoted 9 lines

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#5 lore raw

Re: [Bluez-devel] Gumstix / speed setting in Infineon PBA31308

Thanks for the information Brad. I'm mostly fumbling round in the dark with this stuff.

Do you know if the gumstix's NSSP is visible in userspace? I might have a poke around in the kernel and try and get the audio stream working. (there looks to be some docu in the kernel about it). I think carwhisperer can get a SCO session open at least (I think). might play with that. Is your 'scoot' program available? Do you have any pointer so more documentation on this stuff? If the audio is streamed direct to the CPU once sco is opened, why is it necessary for the hci connection to run at 912k ? Is there a choice of whether to take the audio from hci or direct from pcm then?

Quoted 39 lines · Brad Midgley

Brian

first off: the slower speed should be ok for sco since the audio stream goes direct to the cpu, not through the hci connection. gumstix needs a kernel driver that works with the pcm connection from bluetooth and translates that into a kernel audio device. pcm is connected to gumstix's NSSP i/o (PCM-clock goes to NSSP-clock, PCM-frame goes to NSSP-frame, and PCM-in/out map to the NSSPTXD/TXD)

(it's not relevant, but fyi: rfcomm works at a different level. For higher speeds what we need is for hciattach to negotiate 921k properly. Nobody has worked it out as far as I know. I asked on this list in May and Goetz Issel said he was working on this same chip in an embedded device but I never heard if he got it working.)

Brad

Quoted 9 lines

Hi folks.
Does anybody know if rfcomm can now set the baud rate on the new gumstix Infineon PBA31308 module to the 921,600bps needed for SCO audio to work to/from it?

Thanks,
Brian.

Quoted 10 lines

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Quoted 11 lines

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#6 lore raw

Re: [Bluez-devel] Gumstix / speed setting in Infineon PBA31308

Brian

Quoted 1 line

Do you know if the gumstix's NSSP is visible in userspace?

yes but you'll have to dig into the wiki to get the details and the results may be subpar even running as root with a negative nice value.

I might have

Quoted 3 lines

a poke around in the kernel and try and get the audio stream working. (there looks to be some docu in the kernel about it). I think carwhisperer can get a SCO session open at least (I think). might play

You open an rfcomm connection to the headset and use some AT commands to do things. It's really quite simple (get the headset profile docs at bluetooth.com)

Quoted 2 lines

with that. Is your 'scoot' program available? Do you have any pointer so more documentation on this stuff? If the audio is streamed direct to the

I won't write scoot after all... we're putting things together in a more general way.

Quoted 3 lines

CPU once sco is opened, why is it necessary for the hci connection to run at 912k ? Is there a choice of whether to take the audio from hci or direct from pcm then?

it's not necessary for sco. 921k would be nice for stereo audio.

on csr adapters it's well known how to kick them back and forth between pcm and hci for sco but I don't know about this adapter.

Brad

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#7 lore raw

Re: [Bluez-devel] Gumstix / speed setting in Infineon PBA31308

Thanks again for the reply Brad. It is interesting for me to see how the bluetooth hardware/software works. Thanks for your ongoing work on Linux Bluetooth too.

Quoted 42 lines · Brad Midgley

Brian

Quoted 2 lines

Do you know if the gumstix's NSSP is visible in userspace?

yes but you'll have to dig into the wiki to get the details and the results may be subpar even running as root with a negative nice value.

I might have

Quoted 4 lines

a poke around in the kernel and try and get the audio stream working. (there looks to be some docu in the kernel about it). I think carwhisperer can get a SCO session open at least (I think). might play

You open an rfcomm connection to the headset and use some AT commands to do things. It's really quite simple (get the headset profile docs at bluetooth.com)

Quoted 3 lines

with that. Is your 'scoot' program available? Do you have any pointer so more documentation on this stuff? If the audio is streamed direct to the

I won't write scoot after all... we're putting things together in a more general way.

Quoted 4 lines

CPU once sco is opened, why is it necessary for the hci connection to run at 912k ? Is there a choice of whether to take the audio from hci or direct from pcm then?

it's not necessary for sco. 921k would be nice for stereo audio.

on csr adapters it's well known how to kick them back and forth between pcm and hci for sco but I don't know about this adapter.

Brad

Quoted 11 lines

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author
#8 lore raw
In reply to Olivier Crête
Quoted 12 lines
Quoted 11 lines

I recently got a logitech mx5000 bluetooth desktop. I got it to work with bluez without too many problems (with the CVS hid2hci). It seems to behave mostly like the bluetooth dinovo. I also want to control the display and use the special keys. But they are carried in hidp input reports of type 3 (what the bluetooth hid spec calls "features"). I looked at the 2.6.18-mh7 patch and it has support for full HID or at least a way to get/send reports from userspace, but it seems that hiddev has been removed from it? Why? Also, can't the HID code just be shared with the USB version since its essentially the same anmd you'd get free hiddev. There are events comments in the HID code saying it should be independant from USB, might be a good occasion to do it.

Quoted 4 lines

this is work in progress and I have seen some nice patches for sharing the HID layer between USB and Bluetooth. We will also have a feature that might be called hidraw to directly access the HID reports. So please stay tuned.

This is really nice, is there a public cvs/svn/git tree somewhere ? I've been porting mx5000lib [1] to C and hiddev (while running in HID mode) and it seems that I'm missing some of the information that's probably not sent in proper format.

[1] http://sourceforge.net/projects/mx5000lib/

P.S. lists.sf.net's mailman isn't letting me subscribe, so please keep me in CC

Signature · 2 lines
Olivier Crête
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