HID: add support for another version of 0e8f:0003 device in hid-pl

Add support for another version of 0e8f:0003 device into hid-pl driver.
This device has the values in separate fields and resembles devices
handled by hid-zpff.
Signed-off-by: NAnssi Hannula <anssi.hannula@gmail.com>
Tested-by: NPantelis Koukousoulas <pktoss@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/hid-pl.c

@@ -9,9 +9,12 @@
  *   - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
  *
  *  0e8f:0003 "GreenAsia Inc.    USB Joystick     "
- *   - tested with K??ng Gaming gamepad
+ *   - tested with Knig Gaming gamepad
  *
- *  Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
+ *  0e8f:0003 "GASIA USB Gamepad"
+ *   - another version of the Knig gamepad
+ *
+ *  Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
  */
 
 /*
@@ -46,6 +49,8 @@
 
 struct plff_device {
 	struct hid_report *report;
+	s32 *strong;
+	s32 *weak;
 };
 
 static int hid_plff_play(struct input_dev *dev, void *data,
@@ -62,8 +67,8 @@ static int hid_plff_play(struct input_dev *dev, void *data,
 	left = left * 0x7f / 0xffff;
 	right = right * 0x7f / 0xffff;
 
-	plff->report->field[0]->value[2] = left;
-	plff->report->field[0]->value[3] = right;
+	*plff->strong = left;
+	*plff->weak = right;
 	debug("running with 0x%02x 0x%02x", left, right);
 	usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
 
@@ -80,6 +85,8 @@ static int plff_init(struct hid_device *hid)
 	struct list_head *report_ptr = report_list;
 	struct input_dev *dev;
 	int error;
+	s32 *strong;
+	s32 *weak;
 
 	/* The device contains one output report per physical device, all
 	   containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
@@ -87,7 +94,12 @@ static int plff_init(struct hid_device *hid)
 
 	   The input reports also contain a field which contains
 	   8 ff00.0001 usages and 8 boolean values. Their meaning is
-	   currently unknown. */
+	   currently unknown.
+	   
+	   A version of the 0e8f:0003 exists that has all the values in
+	   separate fields and misses the extra input field, thus resembling
+	   Zeroplus (hid-zpff) devices.
+	*/
 
 	if (list_empty(report_list)) {
 		dev_err(&hid->dev, "no output reports found\n");
@@ -110,8 +122,21 @@ static int plff_init(struct hid_device *hid)
 			return -ENODEV;
 		}
 
-		if (report->field[0]->report_count < 4) {
-			dev_err(&hid->dev, "not enough values in the field\n");
+		if (report->field[0]->report_count >= 4) {
+			report->field[0]->value[0] = 0x00;
+			report->field[0]->value[1] = 0x00;
+			strong = &report->field[0]->value[2];
+			weak = &report->field[0]->value[3];
+			debug("detected single-field device");
+		} else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 &&
+				report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) {
+			report->field[0]->value[0] = 0x00;
+			report->field[1]->value[0] = 0x00;
+			strong = &report->field[2]->value[0];
+			weak = &report->field[3]->value[0];
+			debug("detected 4-field device");
+		} else {
+			dev_err(&hid->dev, "not enough fields or values\n");
 			return -ENODEV;
 		}
 
@@ -130,10 +155,11 @@ static int plff_init(struct hid_device *hid)
 		}
 
 		plff->report = report;
-		plff->report->field[0]->value[0] = 0x00;
-		plff->report->field[0]->value[1] = 0x00;
-		plff->report->field[0]->value[2] = 0x00;
-		plff->report->field[0]->value[3] = 0x00;
+		plff->strong = strong;
+		plff->weak = weak;
+
+		*strong = 0x00;
+		*weak = 0x00;
 		usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
 	}
 
@@ -180,7 +206,7 @@ static const struct hid_device_id pl_devices[] = {
 		.driver_data = 1 }, /* Twin USB Joystick */
 	{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
 		.driver_data = 1 }, /* Twin USB Joystick */
-	{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), }, /* GreenAsia Inc. USB Joystick */
+	{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, pl_devices);