linux-kernel - Re: Keyboard and mouse issues on MacBook Air (4,2)

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Date:	Sat, 22 Oct 2011 04:02:05 +0200
From:	Nico Schottelius <nico-linux-20111017@...ottelius.org>
To:	Nico Schottelius <nico-linux-20111017@...ottelius.org>,
	Jiri Kosina <jkosina@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Keyboard and mouse issues on MacBook Air (4,2)

Hey Jiri,

I've found the problematic block in drivers/hid/hid-apple.c:180:

180    if (fnmode) {
181       int do_translate;
182 
183       if (hid->product >= USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI &&
184             hid->product <= USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS)
185          table = macbookair_fn_keys;
186       else if (hid->product >= USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI &&
187             hid->product <= USB_DEVICE_ID_APPLE_WELLSPRING6_JIS)
188          table = macbookair_fn_keys;
189       else if (hid->product < 0x21d || hid->product >= 0x300)
190          table = powerbook_fn_keys;
191       else
192          table = apple_fn_keys;

The second range (186-188) specified matches my MacBookAir, which needs the new table I defined
in my previous commit: My device matches USB_DEVICE_ID_APPLE_WELLSPRING6_ISO (024D):

[    2.639063] apple 0003:05AC:024D.0001: input,hidraw0: USB HID v1.11 Keyboard [Apple Inc. Apple Internal Keyboard / Trackpad] on usb-0000:00:1a.7-1.2/input0
[    2.694742] usb 2-1.1: new high speed USB device number 3 using ehci_hcd
[    2.736895] apple 0003:05AC:024D.0002: hidraw1: USB HID v1.11 Device [Apple Inc. Apple Internal Keyboard / Trackpad] on usb-0000:00:1a.7-1.2/input1

The question for me is know, which range matches to the table I am using
and which range maps to the original table.

I know that the MacBook Air 3,1 must use the old table, so I IMAGINE this is
the first block (183-185).

So my next guess is that MBA 3,1 - 3,2 need to use the first table, while MBA 4,1 - 4,2 need
the second one.

Can you verify my assumption or do you have any hints on how the MacBook Airs and
the Keyboard layouts match? 

Cheers,

Nico

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