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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: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Simon Wood 2013-11-06 12:30:44 -07:00 committed by Jiri Kosina
parent 114a55cf9d
commit 1859762ed5
1 changed files with 24 additions and 0 deletions
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24
drivers/hid/hid-lg4ff.c
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@ -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;