[Bluez-users] why does one need bluez-firmware ?

[Bluez-users] why does one need bluez-firmware ?

[amateur]

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Re: [Bluez-users] why does one need bluez-firmware ?

[Marcel Holtmann]

Hi,

> I read on some web pages that one need bluez-firmware to be able to
> operate the BroadCom 203x series bluetooth dongle correctly on a 2.4
> kernel. So I am wondering what is the purpose of bluez-firmware? And
> how does it work? 

that is a misunderstanding. For the 2.6 kernel you use a kernel module
to load the firmware. For 2.4 an extra USB application was needed. Both
however need the firmware files.

Regards

Marcel



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Re: [Bluez-users] why does one need bluez-firmware ?

[amateur]

On Sun, Dec 17, 2006 at 01:15:30PM +0100, Marcel Holtmann wrote:
> Hi,
> 
> > I read on some web pages that one need bluez-firmware to be able to
> > operate the BroadCom 203x series bluetooth dongle correctly on a 2.4
> > kernel. So I am wondering what is the purpose of bluez-firmware? And
> > how does it work? 
> 
> that is a misunderstanding. For the 2.6 kernel you use a kernel module
> to load the firmware. For 2.4 an extra USB application was needed. Both
> however need the firmware files.

And what is the purpose of bluez-firmware? How does it work?


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Re: [Bluez-users] why does one need bluez-firmware ?

[Marcel Holtmann]

Hi,

> > > I read on some web pages that one need bluez-firmware to be able to
> > > operate the BroadCom 203x series bluetooth dongle correctly on a 2.4
> > > kernel. So I am wondering what is the purpose of bluez-firmware? And
> > > how does it work? 
> > 
> > that is a misunderstanding. For the 2.6 kernel you use a kernel module
> > to load the firmware. For 2.4 an extra USB application was needed. Both
> > however need the firmware files.
> 
> And what is the purpose of bluez-firmware? How does it work?

this package only contains the binary firmware blobs. Nothing more.

Regards

Marcel



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Re: [Bluez-users] why does one need bluez-firmware ?

[Steve " 'dillo " Okay (Roadknight Labs)]

On Dec 18, 2006, at 10:06 , bluez-users-request@lists.sourceforge.net  
wrote:

> On Sun, Dec 17, 2006 at 01:15:30PM +0100, Marcel Holtmann wrote:
>> Hi,
>>
>>> I read on some web pages that one need bluez-firmware to be able to
>>> operate the BroadCom 203x series bluetooth dongle correctly on a 2.4
>>> kernel. So I am wondering what is the purpose of bluez-firmware? And
>>> how does it work?
>>
>> that is a misunderstanding. For the 2.6 kernel you use a kernel  
>> module
>> to load the firmware. For 2.4 an extra USB application was needed.  
>> Both
>> however need the firmware files.
>
> And what is the purpose of bluez-firmware? How does it work?

The USB dongles themselves are stupid and don't have operational  
firmware in them.

It's a cost-saving measure. By using uploadable firmware, the  
manufacturer (Dlink, Linksys, whoever)
doesn't have to make a Windows version and a Mac version and a Linux  
version.
They just make one type of device and then ship the appropriate  
firmware blob on the drivers CD.

So the real reason you need the BlueZ firmware is that the driver has  
to upload the right firmware(in this case, for Linux) into the
bluetooth module itself, otherwise it won't work.

HTH,
-----Steve

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Re: [Bluez-users] why does one need bluez-firmware ?

[Marcel Holtmann]

Hi Steve,

> >>> I read on some web pages that one need bluez-firmware to be able to
> >>> operate the BroadCom 203x series bluetooth dongle correctly on a 2.4
> >>> kernel. So I am wondering what is the purpose of bluez-firmware? And
> >>> how does it work?
> >>
> >> that is a misunderstanding. For the 2.6 kernel you use a kernel  
> >> module
> >> to load the firmware. For 2.4 an extra USB application was needed.  
> >> Both
> >> however need the firmware files.
> >
> > And what is the purpose of bluez-firmware? How does it work?
> 
> The USB dongles themselves are stupid and don't have operational  
> firmware in them.

most of them actually do have the firmware in flash or RAM. Only a few
need a firmware download before they can be used.

> It's a cost-saving measure. By using uploadable firmware, the  
> manufacturer (Dlink, Linksys, whoever)
> doesn't have to make a Windows version and a Mac version and a Linux  
> version.
> They just make one type of device and then ship the appropriate  
> firmware blob on the drivers CD.

This is a generalization from the WiFi world and it is simply not true.
Only a minor number of devices need a firmware download.

> So the real reason you need the BlueZ firmware is that the driver has  
> to upload the right firmware(in this case, for Linux) into the
> bluetooth module itself, otherwise it won't work.

Just to make it clear. You are talking about a firmware download. You
download firmware to the device. An upload would mean to extract the
firmware from the device.

Regards

Marcel



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