137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
|
|
* Force feedback support for Logitech Speed Force Wireless
|
|
*
|
|
* http://wiibrew.org/wiki/Logitech_USB_steering_wheel
|
|
*
|
|
* Copyright (c) 2010 Simon Wood <simon@mungewell.org>
|
|
*/
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
|
|
#include <linux/input.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/hid.h>
|
|
|
|
#include "usbhid/usbhid.h"
|
|
#include "hid-lg.h"
|
|
|
|
struct lg4ff_device {
|
|
struct hid_report *report;
|
|
};
|
|
|
|
static const signed short ff4_wheel_ac[] = {
|
|
FF_CONSTANT,
|
|
FF_AUTOCENTER,
|
|
-1
|
|
};
|
|
|
|
static int hid_lg4ff_play(struct input_dev *dev, void *data,
|
|
struct ff_effect *effect)
|
|
{
|
|
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);
|
|
int x;
|
|
|
|
#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
|
|
|
|
switch (effect->type) {
|
|
case FF_CONSTANT:
|
|
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
|
|
CLAMP(x);
|
|
report->field[0]->value[0] = 0x11; /* Slot 1 */
|
|
report->field[0]->value[1] = 0x10;
|
|
report->field[0]->value[2] = x;
|
|
report->field[0]->value[3] = 0x00;
|
|
report->field[0]->value[4] = 0x00;
|
|
report->field[0]->value[5] = 0x08;
|
|
report->field[0]->value[6] = 0x00;
|
|
dbg_hid("Autocenter, x=0x%02X\n", x);
|
|
|
|
usbhid_submit_report(hid, report, USB_DIR_OUT);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void hid_lg4ff_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;
|
|
|
|
*value++ = 0xfe;
|
|
*value++ = 0x0d;
|
|
*value++ = 0x07;
|
|
*value++ = 0x07;
|
|
*value++ = (magnitude >> 8) & 0xff;
|
|
*value++ = 0x00;
|
|
*value = 0x00;
|
|
|
|
usbhid_submit_report(hid, report, USB_DIR_OUT);
|
|
}
|
|
|
|
|
|
int lg4ff_init(struct hid_device *hid)
|
|
{
|
|
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
|
|
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
|
|
struct input_dev *dev = hidinput->input;
|
|
struct hid_report *report;
|
|
struct hid_field *field;
|
|
const signed short *ff_bits = ff4_wheel_ac;
|
|
int error;
|
|
int i;
|
|
|
|
/* Find the report to use */
|
|
if (list_empty(report_list)) {
|
|
err_hid("No output report found");
|
|
return -1;
|
|
}
|
|
|
|
/* Check that the report looks ok */
|
|
report = list_entry(report_list->next, struct hid_report, list);
|
|
if (!report) {
|
|
err_hid("NULL output report");
|
|
return -1;
|
|
}
|
|
|
|
field = report->field[0];
|
|
if (!field) {
|
|
err_hid("NULL field");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; ff_bits[i] >= 0; i++)
|
|
set_bit(ff_bits[i], dev->ffbit);
|
|
|
|
error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
if (test_bit(FF_AUTOCENTER, dev->ffbit))
|
|
dev->ff->set_autocenter = hid_lg4ff_set_autocenter;
|
|
|
|
dev_info(&hid->dev, "Force feedback for Logitech Speed Force Wireless by "
|
|
"Simon Wood <simon@mungewell.org>\n");
|
|
return 0;
|
|
}
|
|
|