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Commit 1859762e authored by Simon Wood's avatar Simon Wood Committed by Jiri Kosina
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HID:hid-lg4ff: Correct Auto-center strength for wheels other than MOMO and MOMO2 



The MOMO and MOMO2 wheels have a slightly different autocenter command,
and accept values in the range 0..F (rather than 0..7 for the other wheels).

This patch uses the product ID to determine how to compute the strength.

Signed-off-by: default avatarSimon Wood <simon@mungewell.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 114a55cf

drivers/hid/hid-lg4ff.c

+24 −0
Original line number Diff line number Diff line
@@ -234,6 +234,20 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud 
	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);

	__s32 *value = report->field[0]->value;

	__u32 expand_a, expand_b;

	struct lg4ff_device_entry *entry;

	struct lg_drv_data *drv_data;



	drv_data = hid_get_drvdata(hid);

	if (!drv_data) {

		hid_err(hid, "Private driver data not found!\n");

		return;

	}



	entry = drv_data->device_props;

	if (!entry) {

		hid_err(hid, "Device properties not found!\n");

		return;

	}



	/* De-activate Auto-Center */

	if (magnitude == 0) {
@@ -257,6 +271,16 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud 
		expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);

	}



	/* Adjust for non-MOMO wheels */

	switch (entry->product_id) {

	case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:

	case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:

		break;

	default:

		expand_a = expand_a >> 1;

		break;

	}



	value[0] = 0xfe;

	value[1] = 0x0d;

	value[2] = expand_a / 0xaaaa;