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Subject[PATCH v2 3/4] HID: hid-lg4ff: Introduce a module parameter to disable automatic switch of Logitech gaming wheels from compatibility to native mode. This only applies to multimode wheels.
Date
Introduce a module parameter to disable automatic switch of Logitech gaming
wheels from compatibility to native mode. This only applies to multimode wheels.

Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net>
---
drivers/hid/hid-lg.c | 6 ++++++
drivers/hid/hid-lg4ff.c | 4 +++-
2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index f91ff14..8dae03f 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -818,4 +818,10 @@ static struct hid_driver lg_driver = {
};
module_hid_driver(lg_driver);

+#ifdef CONFIG_LOGIWHEELS_FF
+extern int lg4ff_no_autoswitch; /* From hid-lg4ff.c */
+module_param_named(lg4ff_no_autoswitch, lg4ff_no_autoswitch, int, S_IRUGO);
+MODULE_PARM_DESC(lg4ff_no_autoswitch, "Do not switch multimode wheels to their native mode automatically");
+#endif
+
MODULE_LICENSE("GPL");
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 3401f17..e4b8cae 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -67,6 +67,7 @@
#define LG4FF_FFEX_REV_MAJ 0x21
#define LG4FF_FFEX_REV_MIN 0x00

+int lg4ff_no_autoswitch = 0;
static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);

@@ -803,7 +804,8 @@ int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, c
/* Switch from "Driving Force" mode to native mode automatically.
* Otherwise keep the wheel in its current mode */
if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
- reported_product_id != *real_product_id) {
+ reported_product_id != *real_product_id &&
+ !lg4ff_no_autoswitch) {
const struct lg4ff_compat_mode_switch *s;

switch (*real_product_id) {
--
2.3.0


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