136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
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* Force feedback support for Logitech Speed Force Wireless
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*
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* http://wiibrew.org/wiki/Logitech_USB_steering_wheel
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*
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* Copyright (c) 2010 Simon Wood <simon@mungewell.org>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "usbhid/usbhid.h"
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#include "hid-lg.h"
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struct lg4ff_device {
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struct hid_report *report;
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};
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static const signed short ff4_wheel_ac[] = {
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FF_CONSTANT,
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FF_AUTOCENTER,
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-1
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};
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static int hid_lg4ff_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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int x;
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#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
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switch (effect->type) {
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case FF_CONSTANT:
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x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
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CLAMP(x);
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report->field[0]->value[0] = 0x11; /* Slot 1 */
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report->field[0]->value[1] = 0x10;
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report->field[0]->value[2] = x;
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report->field[0]->value[3] = 0x00;
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report->field[0]->value[4] = 0x00;
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report->field[0]->value[5] = 0x08;
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report->field[0]->value[6] = 0x00;
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dbg_hid("Autocenter, x=0x%02X\n", x);
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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break;
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}
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return 0;
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}
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static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__s32 *value = report->field[0]->value;
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*value++ = 0xfe;
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*value++ = 0x0d;
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*value++ = 0x07;
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*value++ = 0x07;
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*value++ = (magnitude >> 8) & 0xff;
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*value++ = 0x00;
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*value = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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}
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int lg4ff_init(struct hid_device *hid)
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{
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struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct input_dev *dev = hidinput->input;
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struct hid_report *report;
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struct hid_field *field;
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const signed short *ff_bits = ff4_wheel_ac;
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int error;
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int i;
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/* Find the report to use */
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if (list_empty(report_list)) {
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hid_err(hid, "No output report found\n");
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return -1;
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}
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/* Check that the report looks ok */
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report = list_entry(report_list->next, struct hid_report, list);
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if (!report) {
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hid_err(hid, "NULL output report\n");
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return -1;
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}
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field = report->field[0];
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if (!field) {
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hid_err(hid, "NULL field\n");
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return -1;
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}
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for (i = 0; ff_bits[i] >= 0; i++)
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set_bit(ff_bits[i], dev->ffbit);
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error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
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if (error)
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return error;
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if (test_bit(FF_AUTOCENTER, dev->ffbit))
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dev->ff->set_autocenter = hid_lg4ff_set_autocenter;
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hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
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return 0;
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}
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