Date:	Mon, 30 May 2011 18:02:25 -0300
From:	"Gustavo F. Padovan" <padovan@...fusion.mobi>
To:	Ed Tomlinson <edt@....ca>
Cc:	corey@...sanian.com, Ville Tervo <ville.tervo@...ia.com>,
	wyrles@...am.com, "Cufi, Carles" <carles.cufi@...dicsemi.no>,
	Bluettooth Linux <linux-bluetooth@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Linux 2.6.39

* Ed Tomlinson <edt@....ca> [2011-05-26 06:47:55 -0400]:

> On Thursday 26 May 2011 06:17:20 Corey Boyle wrote:
> > On Thu, May 26, 2011 at 4:37 AM, Ville Tervo <ville.tervo@...ia.com> wrote:
> > > On Wed, May 25, 2011 at 09:11:19PM -0400, ext Corey Boyle wrote:
> > >> On Wed, May 25, 2011 at 12:31 PM, Tom Allebrandi <wyrles@...am.com> wrote:
> > >> > -----Original Message-----
> > >> > From: linux-bluetooth-owner@...r.kernel.org
> > >> > [mailto:linux-bluetooth-owner@...r.kernel.org] On Behalf Of Cufi, Carles
> > >> > Sent: Wednesday, May 25, 2011 7:15 AM
> > >> > To: corey@...sanian.com
> > >> > Cc: Ed Tomlinson; Ville Tervo; Bluettooth Linux;
> > >> > linux-kernel@...r.kernel.org
> > >> > Subject: RE: Linux 2.6.39
> > >> >
> > >> > (Snipping...)
> > >> > On Wed, May 25, 2011 at 8:46 AM, Cufi, Carles <carles.cufi@...dicsemi.no>
> > >> > wrote:
> > >> >> On Wednesday 25 May 2011 07:36:14 Ville Tervo wrote:
> > >> >>> On Wed, May 25, 2011 at 07:11:17AM -0400, ext Ed Tomlinson wrote:
> > >> >>> > On Wednesday 25 May 2011 06:54:54 Corey Boyle wrote:
> > >> >>> > > > On Mon, May 23, 2011 at 06:08:36PM -0400, ext Ed Tomlinson wrote:
> > >> >>> > > > > On Saturday 21 May 2011 16:31:00 Ed Tomlinson wrote:
> > >> >>> > > > > > On Saturday 21 May 2011 13:56:20 Milan Oravec wrote:
> > >> > ...
> > >> >>> > Read Local Version Information (0x04|0x0001) plen 0
> > >> >>> > > HCI Event: Command Complete (0x0e) plen 12
> > >> >>> >     Read Local Version Information (0x04|0x0001) ncmd 1
> > >> >>> >     status 0x00
> > >> >>> >     HCI Version: 1.1 (0x1) HCI Revision: 0x20d
> > >> > *************************
> > >> >>> >     LMP Version: 1.1 (0x1) LMP Subversion: 0x20d
> > >> > *************************
> > >> >>> >     Manufacturer: Cambridge Silicon Radio (10) < HCI Command: Set
> > >> >>> > Event Mask (0x03|0x0001) plen 8
> > >> >>> >     Mask: 0xfffffbff00000000
> > >> > *************************
> > >> >>> > > HCI Event: Command Complete (0x0e) plen 4
> > >> >>> >     Set Event Mask (0x03|0x0001) ncmd 1
> > >> >>> >     status 0x12
> > >> >>> >     Error: Invalid HCI Command Parameters
> > >> >>
> > >> >>Set Event Mask has been in the Bluetooth Spec since day 1, so it must be
> > >> > the bitmask, which has been extended with each new spec release to cover
> > >> > newly >added events. Looking at the latest spec, and judging by the year
> > >> > your chipset was released in (it probably is a 1.1 compliant chipset) I
> > >> > believe that >0x000000008FFFFFFF is the highest event mask it would support
> > >> > (up until and including Page Scan Repetition Mode Change Event), but since I
> > >> > don't have the >old 1.1 spec around I may be one or two bits off.
> > >> >
> > >> > The device appears to have identified itself as CSR firmware using Bluetooth
> > >> > version 1.1.
> > >> >
> > >> > I do happen to have the 1.1 spec lying around :-), for Set_Event_Mask it
> > >> > says
> > >> >
> > >> > 0x0000000100000000
> > >> > To                                          Reserved for future use
> > >> > 0x8000000000000000
> > >> >
> > >> > 0x00000000FFFFFFFF      Default (All events enabled)
> > >> >
> > >>
> > >> I am beginning to think that my adapter simply does not support this
> > >> command.  I have tried with all the suggested bitmasks, all zeros, all
> > >> ones, all combinations where a single bit is set, etc.  I'm not sure
> > >> where to go from here other than add a flag which incidates that
> > >> certain devices don't support this command so it can be skipped.
> > >> Again, the only way I have gotten it to work is by not sending the
> > >> command at all.  Thoughts?
> > >
> > > I also played a bit with 1.1 CSR dongle and couldn't find any mask that would
> > > be accepted. I think this command can be left out for older than 1.2 devices.
> > >
> > > Following patch should do it. Could you verify it. I don't have access to old
> > > hw ATM.
> > >
> > > diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
> > > index 19cd4af..86d1e26 100644
> > > --- a/net/bluetooth/hci_event.c
> > > +++ b/net/bluetooth/hci_event.c
> > > @@ -477,14 +477,16 @@ static void hci_setup_event_mask(struct hci_dev *hdev)
> > >         * command otherwise */
> > >        u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
> > >
> > > -       /* Events for 1.2 and newer controllers */
> > > -       if (hdev->lmp_ver > 1) {
> > > -               events[4] |= 0x01; /* Flow Specification Complete */
> > > -               events[4] |= 0x02; /* Inquiry Result with RSSI */
> > > -               events[4] |= 0x04; /* Read Remote Extended Features Complete */
> > > -               events[5] |= 0x08; /* Synchronous Connection Complete */
> > > -               events[5] |= 0x10; /* Synchronous Connection Changed */
> > > -       }
> > > +       /* CSR 1.1 dongles does not accept any bitfield so don't try to set
> > > +        * any event mask for pre 1.2 devices */
> > > +       if (hdev->lmp_ver <= 1)
> > > +               return;
> > > +
> > > +       events[4] |= 0x01; /* Flow Specification Complete */
> > > +       events[4] |= 0x02; /* Inquiry Result with RSSI */
> > > +       events[4] |= 0x04; /* Read Remote Extended Features Complete */
> > > +       events[5] |= 0x08; /* Synchronous Connection Complete */
> > > +       events[5] |= 0x10; /* Synchronous Connection Changed */
> > >
> > >        if (hdev->features[3] & LMP_RSSI_INQ)
> > >                events[4] |= 0x04; /* Inquiry Result with RSSI */
> > > --
> > >
> > >
> > 
> > Patch works great - typing this email from my bluetooth keyboard.
> 
> Works here too.

Great, I'll consider both comments as a Tested-by thing and add it to the
commit.

-- 
Gustavo F. Padovan
http://profusion.mobi
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