[Bluez-devel] power consumption

[Bluez-devel] power consumption

[david]

hi marcel,

I am working on an an embedded phone, so power consumption is very
important to me. Bluez-utils-2.9 supports the following link policy,
RSWITH, HOLD, PARK, SNIFF mode. Dose it support
auto-sniff/hold/park-mode, or it must be done by ourselves by sending
HCI command?

Regards,

david


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Re: [Bluez-devel] power consumption

[Marcel Holtmann]

Hi David,

> I am working on an an embedded phone, so power consumption is very
> important to me. Bluez-utils-2.9 supports the following link policy,
> RSWITH, HOLD, PARK, SNIFF mode. Dose it support
> auto-sniff/hold/park-mode, or it must be done by ourselves by sending
> HCI command?

you should first update your bluez-utils, because version 2.9 is quite
old.

The auto-sniff is on my todo list, but so far I haven't done it and
nobody offered me something for doing it now. The support for hold mode
or park state is not needed. The hold mode is used internally by every
chip to support multiple connections with scatternet formation and the
park state doesn't give you any advantage at all. This means that you
have to use sniff at the moment by yourself. However the only source for
doing good decisions of putting a device into sniff mode, is the kernel
and thus the auto-sniff support should be implemented there.

Regards

Marcel




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[Bluez-devel] power consumption

[david]

Hi marcel,

The host send HCILL_GO_TO_SLEEP_IND commdand which is HCI
Vendor-Specific Command to let bluetooth device(BRF6100) go to sleep
through hcitool cmd. The bluetooth device will send
HCILL_GO_TO_SLEEP_ACK to the host before it goes to sleep. The question
is that where should I listen the response of bluetooth device.


Regards,

david

 >Hi David,
 
 > > Does anybody use BRF6100 chip on the phone? I have read "BRF6100
 > > singel-chip bluetooth RF device" date sheet to get the method of doing
 > > power management. It tells me that I can use the HCI command to take the
 > > BRF6100 from wake up to deep sleep.  It seems that the date sheet
 > > doesn't tell me how to turn off/on the BRF6100(Is this called
 > > power-down/on mode?). I wonder to know what do ioctl(ctl, HCIDEVUP,
 > > hdev)) and ioctl(ctl, HCIDEVDOWN, hdev) do in bluez hcitool.c? Can it
 > > turn BRF6100 on or off? If yes, is the menu "bluetooth on/off" in
 > > mobilephone means that the power of BRF6100 is turned on/off?
 
 > the BRF6100 is a ROM chip, right? We need a special init routine for it
 > and the last code I've seen was a mess, because it was Windows code.
 > This needs a rewrite and I am only doing this if someone sends me a
 > development kit with that I can test it. The other possibility is that
 > someone cleans the code and sends me a patch for it.
 
 > If you need special support, then tell TI to open their documents and
 > sponsor the BlueZ project with hardware. Or choose a chip manufacturer
 > that is more open source friendly. For example CSR.
 
 > Regards
 
 > Marcel
 


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Re: [Bluez-devel] power consumption

[Marcel Holtmann]

Hi David,

> The host send HCILL_GO_TO_SLEEP_IND commdand which is HCI
> Vendor-Specific Command to let bluetooth device(BRF6100) go to sleep
> through hcitool cmd. The bluetooth device will send
> HCILL_GO_TO_SLEEP_ACK to the host before it goes to sleep. The question
> is that where should I listen the response of bluetooth device.

I need more details on this and some hardware to play with.

Regards

Marcel




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