[PATCH] Support force feedback on MP-8866

[Sean Young <sean@mess.org>]

Support force feedback on the Dual USB Force Feedback Joypad (MP-8866).

Note I do not have the Smartjoy Plus hardware to test if the driver
still works with that. It should not be affected, though.

Signed-off-by: Sean Young <sean@mess.org>
---
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 6f3289a..416128a 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1494,6 +1494,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
diff --git a/drivers/hid/hid-sjoy.c b/drivers/hid/hid-sjoy.c
index 16f7caf..6140943 100644
--- a/drivers/hid/hid-sjoy.c
+++ b/drivers/hid/hid-sjoy.c
@@ -65,8 +65,7 @@ static int sjoyff_init(struct hid_device *hid)
 {
 	struct sjoyff_device *sjoyff;
 	struct hid_report *report;
-	struct hid_input *hidinput = list_entry(hid->inputs.next,
-						struct hid_input, list);
+	struct hid_input *hidinput;
 	struct list_head *report_list =
 			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
 	struct list_head *report_ptr = report_list;
@@ -78,43 +77,45 @@ static int sjoyff_init(struct hid_device *hid)
 		return -ENODEV;
 	}
 
-	report_ptr = report_ptr->next;
+	list_for_each_entry(hidinput, &hid->inputs, list) {
+		report_ptr = report_ptr->next;
 
-	if (report_ptr == report_list) {
-		hid_err(hid, "required output report is missing\n");
-		return -ENODEV;
-	}
+		if (report_ptr == report_list) {
+			hid_err(hid, "required output report is missing\n");
+			return -ENODEV;
+		}
 
-	report = list_entry(report_ptr, struct hid_report, list);
-	if (report->maxfield < 1) {
-		hid_err(hid, "no fields in the report\n");
-		return -ENODEV;
-	}
+		report = list_entry(report_ptr, struct hid_report, list);
+		if (report->maxfield < 1) {
+			hid_err(hid, "no fields in the report\n");
+			return -ENODEV;
+		}
 
-	if (report->field[0]->report_count < 3) {
-		hid_err(hid, "not enough values in the field\n");
-		return -ENODEV;
-	}
+		if (report->field[0]->report_count < 3) {
+			hid_err(hid, "not enough values in the field\n");
+			return -ENODEV;
+		}
 
-	sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
-	if (!sjoyff)
-		return -ENOMEM;
+		sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
+		if (!sjoyff)
+			return -ENOMEM;
 
-	dev = hidinput->input;
+		dev = hidinput->input;
 
-	set_bit(FF_RUMBLE, dev->ffbit);
+		set_bit(FF_RUMBLE, dev->ffbit);
 
-	error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
-	if (error) {
-		kfree(sjoyff);
-		return error;
-	}
+		error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
+		if (error) {
+			kfree(sjoyff);
+			return error;
+		}
 
-	sjoyff->report = report;
-	sjoyff->report->field[0]->value[0] = 0x01;
-	sjoyff->report->field[0]->value[1] = 0x00;
-	sjoyff->report->field[0]->value[2] = 0x00;
-	usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
+		sjoyff->report = report;
+		sjoyff->report->field[0]->value[0] = 0x01;
+		sjoyff->report->field[0]->value[1] = 0x00;
+		sjoyff->report->field[0]->value[2] = 0x00;
+		usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
+	}
 
 	hid_info(hid, "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
 
@@ -131,6 +132,8 @@ static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret;
 
+	hdev->quirks |= id->driver_data;
+
 	ret = hid_parse(hdev);
 	if (ret) {
 		hid_err(hdev, "parse failed\n");
@@ -152,6 +155,9 @@ err:
 
 static const struct hid_device_id sjoy_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD),
+		.driver_data = HID_QUIRK_MULTI_INPUT | HID_QUIRK_NOGET |
+			       HID_QUIRK_SKIP_OUTPUT_REPORTS },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, sjoy_devices);
diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
index 621959d..df618a3 100644
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -79,7 +79,6 @@ static const struct hid_blacklist {
 	{ USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U, HID_QUIRK_MULTI_INPUT },
 	{ USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH, HID_QUIRK_MULTI_INPUT },
 	{ USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH, HID_QUIRK_MULTI_INPUT },
-	{ USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT | HID_QUIRK_SKIP_OUTPUT_REPORTS },
 	{ USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_QUAD_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
 
 	{ USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },