Date: Sat, 12 Sep 2015 16:26:50 +0200 From: Dirk Engling <erdgeist@erdgeist.org> To: freebsd-bluetooth@freebsd.org Subject: Re: Apple Magic Mouse Message-ID: <55F4362A.4050203@erdgeist.org> In-Reply-To: <alpine.NEB.2.11.1508092034290.5638@galant.ogmig.net> References: <1437909200.57929.3.camel@yandex.com> <alpine.NEB.2.11.1508092034290.5638@galant.ogmig.net>
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On 09.08.15 21:47, plunky at ogmig.net (Iain Hibbert) wrote:
> I'd say that using the NetBSD driver (I am the author) is not really
> possible on FreeBSD, since FreeBSD does things related to Bluetooth HIDs
> differently. It should be simple enough to add the Magic Mouse handling to
> the bthidd(8) daemon though, but I don't know how easy that would be, or a
> separate daemon could be written instead.
I've taken a look and there's several obstacles in the way. But first
the good news, once I add
if (fd == srv->ctrl) {
static uint8_t rep[] = { 0x53, 0xd7, 0x01 };
write(new_fd, rep, 3 );
}
to usr.sbin/bluetooth/bthidd/server.c:272, the hid_interrupt function in
usr.sbin/bluetooth/bthidd/hid.c gets trackpad-events and mouse lift/drop
from the magic mouse.
My problem is now, that this feature report is hard coded and obviously
not every device should be served this. But,
> The way I worked the identification in NetBSD, was that when configuring a
> HID device, I checked the descriptor as normal and also the
> Manufacturer/Product ID via the PNP profile. When the latter matched the
> Apple Magic Mouse, then it just attaches a different driver.
it looks like the Manufacturer/Product ID is ignored on the hci level
and thus not available at higher layers. Maybe I'm missing something here?
> The Magic Mouse then needs an initialization command to be sent via the
> standard HID protocol "SET_REPORT(FEATURE, 0xd7) = 0x01" once connected to
> enable the special extra functionality that it provides.
Also I noticed that the reports sent by the magic mouse are not reported
in their hid descriptor. I get the following reports there (see attachment)
09 02 (LOCAL) USAGE Mouse (CA=Application Collection)
85 10 (GLOBAL) REPORT_ID 0x10 (16)
09 20 (LOCAL) USAGE Battery Strength
85 47 (GLOBAL) REPORT_ID 0x47 (71) 'G'
09 55 (LOCAL) USAGE 0xFF020055
85 55 (GLOBAL) REPORT_ID 0x55 (85) 'U'
But when enabling the magic mouse modes as seen above, I see reports:
HID Interrupt: A1 60 01
HID Interrupt: A1 61 01
Which is 0x60 and 0x61, corresponding with mouse surface lift and drop.
When touching the trackpad area on the mouse, I get
HID Interrupt: A1 29 00 00 80 D0 6B 9F E3 11 4D 16 83 80 32
which is report 0x29 and corresponds to the magic trackpad messages
handled in the NetBSD [1] and Linux driver [2].
Problem is, that the bthidd code does not handle reports not announced
in hid descriptors at all. So I would need to either manually inject the
report id in hid_device->desc and add handler code, handle magic mouse
in a completely different code path, or write my own driver.
Maybe Maksim has some ideas, the daemon is his code, after all.
Regards,
erdgeist
[1]
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/bluetooth/btmagic.c?rev=1.14&content-type=text/x-cvsweb-markup
[2] http://lxr.free-electrons.com/source/drivers/hid/hid-magicmouse.c
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