diff options
| author | Fernando Luis Vázquez Cao <fernando_b1@lab.ntt.co.jp> | 2013-01-22 15:20:38 +0900 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-03-20 15:03:25 +0000 |
| commit | 76610d6dfbe4d5f47ce59582d99e1355efaea916 (patch) | |
| tree | 9e64ea55ae3055f2218c368283599725326bdad6 /drivers/hid | |
| parent | 3207e0076af2a4565230f7c280675383321ecd16 (diff) | |
HID: clean up quirk for Sony RF receivers
commit 99d249021abd4341771523ed8dd7946276103432 upstream.
Document what the fix-up is does and make it more robust by ensuring
that it is only applied to the USB interface that corresponds to the
mouse (sony_report_fixup() is called once per interface during probing).
Cc: linux-input@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-sony.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 963bda15657..4142c21bab2 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -44,9 +44,19 @@ static __u8 *sony_report_fixup(struct hid_device *hdev, __u8 *rdesc, { struct sony_sc *sc = hid_get_drvdata(hdev); - if ((sc->quirks & VAIO_RDESC_CONSTANT) && - *rsize >= 56 && rdesc[54] == 0x81 && rdesc[55] == 0x07) { + /* + * Some Sony RF receivers wrongly declare the mouse pointer as a + * a constant non-data variable. + */ + if ((sc->quirks & VAIO_RDESC_CONSTANT) && *rsize >= 56 && + /* usage page: generic desktop controls */ + /* rdesc[0] == 0x05 && rdesc[1] == 0x01 && */ + /* usage: mouse */ + rdesc[2] == 0x09 && rdesc[3] == 0x02 && + /* input (usage page for x,y axes): constant, variable, relative */ + rdesc[54] == 0x81 && rdesc[55] == 0x07) { hid_info(hdev, "Fixing up Sony RF Receiver report descriptor\n"); + /* input: data, variable, relative */ rdesc[55] = 0x06; } |