HID: Add support for Sony Vaio VGX-TP1E

The Sony Vaio VGX-TP1E multimedia PC has a wireless keyboard with
a touchpad.

The mouse pointer is wrongly declared as constant non-data variable, which make
HID code to completely ignore all the "Pointer" usages.
Fix the report descriptor before it enters the parser to contain touchpad
pointer description that is correctly parsable (declaring data rather than
constant).

Reported-by: Stefan Hundhammer <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: Jiri Kosina

drivers/hid/hid-core.c

@@ -1294,6 +1294,7 @@ static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
 
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 0x030c) },

drivers/hid/hid-ids.h

@@ -350,6 +350,7 @@
 #define USB_DEVICE_ID_SAMSUNG_IR_REMOTE	0x0001
 
 #define USB_VENDOR_ID_SONY			0x054c
+#define USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE	0x024b
 #define USB_DEVICE_ID_SONY_PS3_CONTROLLER	0x0268
 
 #define USB_VENDOR_ID_SOUNDGRAPH	0x15c2

drivers/hid/hid-sony.c

@@ -4,9 +4,9 @@
  *  Copyright (c) 1999 Andreas Gal
  *  Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]>
  *  Copyright (c) 2005 Michael Haboustak <[email protected]> for Concept2, Inc
- *  Copyright (c) 2006-2007 Jiri Kosina
  *  Copyright (c) 2007 Paul Walmsley
  *  Copyright (c) 2008 Jiri Slaby
+ *  Copyright (c) 2006-2008 Jiri Kosina
  */
 
 /*
@@ -23,6 +23,26 @@
 
 #include "hid-ids.h"
 
+#define VAIO_RDESC_CONSTANT 0x0001
+
+struct sony_sc {
+	unsigned long quirks;
+};
+
+/* Sony Vaio VGX has wrongly mouse pointer declared as constant */
+static void sony_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+		unsigned int rsize)
+{
+	struct sony_sc *sc = hid_get_drvdata(hdev);
+
+	if ((sc->quirks & VAIO_RDESC_CONSTANT) &&
+			rsize >= 56 && rdesc[54] == 0x81 && rdesc[55] == 0x07) {
+		dev_info(&hdev->dev, "Fixing up Sony Vaio VGX report "
+				"descriptor\n");
+		rdesc[55] = 0x06;
+	}
+}
+
 /*
  * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
  * to "operational".  Without this, the ps3 controller will not report any
@@ -56,6 +76,17 @@ static int sony_set_operational(struct hid_device *hdev)
 static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret;
+	unsigned long quirks = id->driver_data;
+	struct sony_sc *sc;
+
+	sc = kzalloc(sizeof(*sc), GFP_KERNEL);
+	if (sc == NULL) {
+		dev_err(&hdev->dev, "can't alloc apple descriptor\n");
+		return -ENOMEM;
+	}
+
+	sc->quirks = quirks;
+	hid_set_drvdata(hdev, sc);
 
 	ret = hid_parse(hdev);
 	if (ret) {
@@ -78,11 +109,20 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 err_stop:
 	hid_hw_stop(hdev);
 err_free:
+	kfree(sc);
 	return ret;
 }
 
+static void sony_remove(struct hid_device *hdev)
+{
+	hid_hw_stop(hdev);
+	kfree(hid_get_drvdata(hdev));
+}
+
 static const struct hid_device_id sony_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE),
+		.driver_data = VAIO_RDESC_CONSTANT },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, sony_devices);
@@ -91,6 +131,8 @@ static struct hid_driver sony_driver = {
 	.name = "sony",
 	.id_table = sony_devices,
 	.probe = sony_probe,
+	.remove = sony_remove,
+	.report_fixup = sony_report_fixup,
 };
 
 static int sony_init(void)