HID: hid-logitech: Add combined pedal support Logitech wheels

Add support for reporting a combined accelerator/brake axis for wheels
which contain combined data in their HID stream.

This includes DF, MOMO, MOMO2 and DFP.

Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

3 files changed, 48 insertions, 0 deletions

diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index feb2be71f77c..06f8a5e0fc8f 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -657,6 +657,17 @@ static int lg_event(struct hid_device *hdev, struct hid_field *field,
         return 0;
 }
 
+static int lg_raw_event(struct hid_device *hdev, struct hid_report *report,
+                u8 *rd, int size)
+{
+        struct lg_drv_data *drv_data = hid_get_drvdata(hdev);
+
+        if (drv_data->quirks & LG_FF4)
+                return lg4ff_raw_event(hdev, report, rd, size, drv_data);
+
+        return 0;
+}
+
 static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
         struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
@@ -830,6 +841,7 @@ static struct hid_driver lg_driver = {
         .input_mapping = lg_input_mapping,
         .input_mapped = lg_input_mapped,
         .event = lg_event,
+        .raw_event = lg_raw_event,
         .probe = lg_probe,
         .remove = lg_remove,
 };
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index ca31ce4d2c24..79d34c2f639b 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -329,6 +329,38 @@ int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
         }
 }
 
+int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
+                u8 *rd, int size, struct lg_drv_data *drv_data)
+{
+        struct lg4ff_device_entry *entry = drv_data->device_props;
+
+        if (!entry)
+                return 0;
+
+        /* adjust HID report present combined pedals data */
+        if (entry->wdata.combine) {
+                switch (entry->wdata.product_id) {
+                case USB_DEVICE_ID_LOGITECH_WHEEL:
+                        rd[5] = rd[3];
+                        rd[6] = 0x7F;
+                        return 1;
+                case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
+                case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
+                        rd[4] = rd[3];
+                        rd[5] = 0x7F;
+                        return 1;
+                case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+                        rd[5] = rd[4];
+                        rd[6] = 0x7F;
+                        return 1;
+                default:
+                        return 0;
+                }
+        }
+
+        return 0;
+}
+
 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
                                   const struct lg4ff_multimode_wheel *mmode_wheel,
                                   const u16 real_product_id)
diff --git a/drivers/hid/hid-lg4ff.h b/drivers/hid/hid-lg4ff.h
index 66201af44da3..de1f350e0bd3 100644
--- a/drivers/hid/hid-lg4ff.h
+++ b/drivers/hid/hid-lg4ff.h
@@ -6,11 +6,15 @@ extern int lg4ff_no_autoswitch; /* From hid-lg.c */
 
 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
                              struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data);
+int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
+                u8 *rd, int size, struct lg_drv_data *drv_data);
 int lg4ff_init(struct hid_device *hdev);
 int lg4ff_deinit(struct hid_device *hdev);
 #else
 static inline int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
                                            struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data) { return 0; }
+static inline int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
+                u8 *rd, int size, struct lg_drv_data *drv_data) { return 0; }
 static inline int lg4ff_init(struct hid_device *hdev) { return -1; }
 static inline int lg4ff_deinit(struct hid_device *hdev) { return -1; }
 #endif