From 2bea94db87362ad90d0959201f5c401767042be1 Mon Sep 17 00:00:00 2001 From: Sergey Belyashov Date: Tue, 2 Sep 2008 17:31:16 +0200 Subject: [PATCH] HID: Autocentering support for Logitech MOMO Racing Wheel Current kernel has no support for autocentering for Logitech wheels. By default autocentering enabled in wheel and constant effect does not work properly. Using USB sniffer I found command which change autocentering settings: 0xFE, 0x0D, 0x0R, 0x0L, 0x80, 0x00, 0x00, where R - clockwise force, L - counter-clockwise (0x0-0xF, 0xC = 100%). Signed-off-by: Sergey Belyashov Signed-off-by: Jiri Kosina --- drivers/hid/hid-lgff.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c index e379c167ac9e..51aff08e10ce 100644 --- a/drivers/hid/hid-lgff.c +++ b/drivers/hid/hid-lgff.c @@ -50,6 +50,12 @@ static const signed short ff_joystick[] = { -1 }; +static const signed short ff_wheel[] = { + FF_CONSTANT, + FF_AUTOCENTER, + -1 +}; + static const struct dev_type devices[] = { { 0x046d, 0xc211, ff_rumble }, { 0x046d, 0xc219, ff_rumble }, @@ -57,7 +63,7 @@ static const struct dev_type devices[] = { { 0x046d, 0xc286, ff_joystick }, { 0x046d, 0xc294, ff_joystick }, { 0x046d, 0xc295, ff_joystick }, - { 0x046d, 0xca03, ff_joystick }, + { 0x046d, 0xca03, ff_wheel }, }; static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) @@ -102,6 +108,23 @@ static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *ef return 0; } +static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude) +{ + struct hid_device *hid = input_get_drvdata(dev); + struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; + struct hid_report *report = list_entry(report_list->next, struct hid_report, list); + __s32 *value = report->field[0]->value; + magnitude = (magnitude >> 12) & 0xf; + *value++ = 0xfe; + *value++ = 0x0d; + *value++ = magnitude; /* clockwise strength */ + *value++ = magnitude; /* counter-clockwise strength */ + *value++ = 0x80; + *value++ = 0x00; + *value = 0x00; + usbhid_submit_report(hid, report, USB_DIR_OUT); +} + int lgff_init(struct hid_device* hid) { struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); @@ -147,6 +170,9 @@ int lgff_init(struct hid_device* hid) if (error) return error; + if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) + dev->ff->set_autocenter = hid_lgff_set_autocenter; + printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux \n"); return 0;