Patchwork [3.5.y.z,extended,stable] Patch "HID: microsoft: fix invalid rdesc for 3k kbd" has been added to staging queue

login
register
mail settings
Submitter Herton Ronaldo Krzesinski
Date Dec. 5, 2012, 10:31 p.m.
Message ID <1354746679-22160-1-git-send-email-herton.krzesinski@canonical.com>
Download mbox | patch
Permalink /patch/204013/
State New
Headers show

Comments

Herton Ronaldo Krzesinski - Dec. 5, 2012, 10:31 p.m.
This is a note to let you know that I have just added a patch titled

    HID: microsoft: fix invalid rdesc for 3k kbd

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

From 3923fce2a68edc4b3554b491c9e0bde9feefd764 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Fri, 19 Oct 2012 13:28:46 +0200
Subject: [PATCH] HID: microsoft: fix invalid rdesc for 3k kbd
X-Extended-Stable: 3.5

commit 3ccc60f9d8c39180c205dba1a020735bda1b2491 upstream.

Microsoft Digital Media Keyboard 3000 has two interfaces, and the
second one has a report descriptor with a bug. The second collection
says:
05 01 -- global; usage page -- 01 -- Generic Desktop Controls
09 80 -- local; usage -- 80 -- System Control
a1 01 -- main; collection -- 01 -- application

85 03 -- global; report ID -- 03
19 00 -- local; Usage Minimum -- 00
29 ff -- local; Usage Maximum -- ff
15 00 -- global; Logical Minimum -- 0
26 ff 00 -- global; Logical Maximum -- ff
81 00 -- main; input

c0 -- main; End Collection

I.e. it makes us think that there are all kinds of usages of system
control. That the keyboard is a not only a keyboard, but also a
joystick, mouse, gamepad, keypad, etc. The same as for the Wireless
Desktop Receiver, this should be Physical Min/Max. So fix that
appropriately.

References: https://bugzilla.novell.com/show_bug.cgi?id=776834
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
 drivers/hid/hid-microsoft.c |   18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

--
1.7.9.5

Patch

diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index e5c699b..3899989 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -29,22 +29,30 @@ 
 #define MS_RDESC		0x08
 #define MS_NOGET		0x10
 #define MS_DUPLICATE_USAGES	0x20
+#define MS_RDESC_3K		0x40

-/*
- * Microsoft Wireless Desktop Receiver (Model 1028) has
- * 'Usage Min/Max' where it ought to have 'Physical Min/Max'
- */
 static __u8 *ms_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		unsigned int *rsize)
 {
 	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);

+	/*
+	 * Microsoft Wireless Desktop Receiver (Model 1028) has
+	 * 'Usage Min/Max' where it ought to have 'Physical Min/Max'
+	 */
 	if ((quirks & MS_RDESC) && *rsize == 571 && rdesc[557] == 0x19 &&
 			rdesc[559] == 0x29) {
 		hid_info(hdev, "fixing up Microsoft Wireless Receiver Model 1028 report descriptor\n");
 		rdesc[557] = 0x35;
 		rdesc[559] = 0x45;
 	}
+	/* the same as above (s/usage/physical/) */
+	if ((quirks & MS_RDESC_3K) && *rsize == 106 &&
+			!memcmp((char []){ 0x19, 0x00, 0x29, 0xff },
+				&rdesc[94], 4)) {
+		rdesc[94] = 0x35;
+		rdesc[96] = 0x45;
+	}
 	return rdesc;
 }

@@ -193,7 +201,7 @@  static const struct hid_device_id ms_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB),
 		.driver_data = MS_PRESENTER },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_DIGITAL_MEDIA_3K),
-		.driver_data = MS_ERGONOMY },
+		.driver_data = MS_ERGONOMY | MS_RDESC_3K },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0),
 		.driver_data = MS_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_COMFORT_MOUSE_4500),