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Commit 6e2de8e0 authored by Michal Malý's avatar Michal Malý Committed by Jiri Kosina
Browse files

HID: lg4ff - Add autocentering command accepted by Formula Force EX 



The Logitech driver sends Formula Force EX wheel a different command to
autocenering force. FFEX will accept the standard command used by the rest of
the wheels, but it won't set the centering properly.

Signed-off-by: default avatarMichal Malý <madcatxster@gmail.com>
Signed-off-by: default avatarSimon Wood <simon@mungewell.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 30bb75d7

drivers/hid/hid-lg4ff.c

+33 −3
Original line number Original line Diff line number Diff line
@@ -157,7 +157,9 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e 
	return 0;

	return 0;

}

}





static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude)

/* Sends default autocentering command compatible with

 * all wheels except Formula Force EX */

static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)

{

{

	struct hid_device *hid = input_get_drvdata(dev);

	struct hid_device *hid = input_get_drvdata(dev);

	struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;

	struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
@@ -174,6 +176,26 @@ static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude) 
	usbhid_submit_report(hid, report, USB_DIR_OUT);

	usbhid_submit_report(hid, report, USB_DIR_OUT);

}

}





/* Sends autocentering command compatible with Formula Force EX */

static void hid_lg4ff_set_autocenter_ffex(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);

	magnitude = magnitude * 90 / 65535;

	



	report->field[0]->value[0] = 0xfe;

	report->field[0]->value[1] = 0x03;

	report->field[0]->value[2] = magnitude >> 14;

	report->field[0]->value[3] = magnitude >> 14;

	report->field[0]->value[4] = magnitude;

	report->field[0]->value[5] = 0x00;

	report->field[0]->value[6] = 0x00;



	usbhid_submit_report(hid, report, USB_DIR_OUT);

}



/* Sends command to set range compatible with G25/G27/Driving Force GT */

/* Sends command to set range compatible with G25/G27/Driving Force GT */

static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)

static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)

{

{
@@ -390,8 +412,16 @@ int lg4ff_init(struct hid_device *hid) 
	if (error)

	if (error)

		return error;

		return error;





	if (test_bit(FF_AUTOCENTER, dev->ffbit))

	/* Check if autocentering is available and

		dev->ff->set_autocenter = hid_lg4ff_set_autocenter;

	 * set the centering force to zero by default */

	if (test_bit(FF_AUTOCENTER, dev->ffbit)) {

		if(rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN)	/* Formula Force EX expects different autocentering command */

			dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;

		else

			dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;



		dev->ff->set_autocenter(dev, 0);

	}





		/* Initialize device_list if this is the first device to handle by lg4ff */

		/* Initialize device_list if this is the first device to handle by lg4ff */

	if (!list_inited) {

	if (!list_inited) {