[ 072/117] HID: kye: Add report fixup for Genius Gx Imperator Keyboard

[Greg Kroah-Hartman]

3.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>

commit 0adb9c2c5ed42f199cb2a630c37d18dee385fae2 upstream.

Genius Gx Imperator Keyboard presents the same problem in its report
descriptors than Genius Gila Gaming Mouse.
Use the same fixup for both.

Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=928561

Reported-and-tested-by: Honza Brazdil <jbrazdil@xxxxxxxxxx>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/hid/hid-core.c |    1 +
 drivers/hid/hid-ids.h  |    1 +
 drivers/hid/hid-kye.c  |   45 ++++++++++++++++++++++++++++-----------------
 3 files changed, 30 insertions(+), 17 deletions(-)

--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1597,6 +1597,7 @@ static const struct hid_device_id hid_ha
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_GENIUS_GX_IMPERATOR) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_I405X) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X) },
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -482,6 +482,7 @@
 #define USB_VENDOR_ID_KYE		0x0458
 #define USB_DEVICE_ID_KYE_ERGO_525V	0x0087
 #define USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE	0x0138
+#define USB_DEVICE_ID_GENIUS_GX_IMPERATOR	0x4018
 #define USB_DEVICE_ID_KYE_GPEN_560	0x5003
 #define USB_DEVICE_ID_KYE_EASYPEN_I405X	0x5010
 #define USB_DEVICE_ID_KYE_MOUSEPEN_I608X	0x5011
--- a/drivers/hid/hid-kye.c
+++ b/drivers/hid/hid-kye.c
@@ -268,6 +268,26 @@ static __u8 easypen_m610x_rdesc_fixed[]
 	0xC0                          /*  End Collection                  */
 };
 
+static __u8 *kye_consumer_control_fixup(struct hid_device *hdev, __u8 *rdesc,
+		unsigned int *rsize, int offset, const char *device_name) {
+	/*
+	 * the fixup that need to be done:
+	 *   - change Usage Maximum in the Comsumer Control
+	 *     (report ID 3) to a reasonable value
+	 */
+	if (*rsize >= offset + 31 &&
+	    /* Usage Page (Consumer Devices) */
+	    rdesc[offset] == 0x05 && rdesc[offset + 1] == 0x0c &&
+	    /* Usage (Consumer Control) */
+	    rdesc[offset + 2] == 0x09 && rdesc[offset + 3] == 0x01 &&
+	    /*   Usage Maximum > 12287 */
+	    rdesc[offset + 10] == 0x2a && rdesc[offset + 12] > 0x2f) {
+		hid_info(hdev, "fixing up %s report descriptor\n", device_name);
+		rdesc[offset + 12] = 0x2f;
+	}
+	return rdesc;
+}
+
 static __u8 *kye_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		unsigned int *rsize)
 {
@@ -315,23 +335,12 @@ static __u8 *kye_report_fixup(struct hid
 		}
 		break;
 	case USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE:
-		/*
-		 * the fixup that need to be done:
-		 *   - change Usage Maximum in the Comsumer Control
-		 *     (report ID 3) to a reasonable value
-		 */
-		if (*rsize >= 135 &&
-			/* Usage Page (Consumer Devices) */
-			rdesc[104] == 0x05 && rdesc[105] == 0x0c &&
-			/* Usage (Consumer Control) */
-			rdesc[106] == 0x09 && rdesc[107] == 0x01 &&
-			/*   Usage Maximum > 12287 */
-			rdesc[114] == 0x2a && rdesc[116] > 0x2f) {
-			hid_info(hdev,
-				 "fixing up Genius Gila Gaming Mouse "
-				 "report descriptor\n");
-			rdesc[116] = 0x2f;
-		}
+		rdesc = kye_consumer_control_fixup(hdev, rdesc, rsize, 104,
+					"Genius Gila Gaming Mouse");
+		break;
+	case USB_DEVICE_ID_GENIUS_GX_IMPERATOR:
+		rdesc = kye_consumer_control_fixup(hdev, rdesc, rsize, 83,
+					"Genius Gx Imperator Keyboard");
 		break;
 	}
 	return rdesc;
@@ -428,6 +437,8 @@ static const struct hid_device_id kye_de
 				USB_DEVICE_ID_KYE_EASYPEN_M610X) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE,
 				USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE,
+				USB_DEVICE_ID_GENIUS_GX_IMPERATOR) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, kye_devices);


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