118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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* Force feedback support for Logitech Rumblepad 2
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*
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* Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
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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/slab.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 lg2ff_device {
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struct hid_report *report;
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};
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static int play_effect(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 lg2ff_device *lg2ff = data;
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int weak, strong;
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strong = effect->u.rumble.strong_magnitude;
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weak = effect->u.rumble.weak_magnitude;
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if (weak || strong) {
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weak = weak * 0xff / 0xffff;
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strong = strong * 0xff / 0xffff;
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lg2ff->report->field[0]->value[0] = 0x51;
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lg2ff->report->field[0]->value[2] = weak;
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lg2ff->report->field[0]->value[4] = strong;
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} else {
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lg2ff->report->field[0]->value[0] = 0xf3;
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lg2ff->report->field[0]->value[2] = 0x00;
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lg2ff->report->field[0]->value[4] = 0x00;
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}
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usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT);
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return 0;
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}
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int lg2ff_init(struct hid_device *hid)
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{
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struct lg2ff_device *lg2ff;
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struct hid_report *report;
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struct hid_input *hidinput = list_entry(hid->inputs.next,
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struct hid_input, list);
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struct list_head *report_list =
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&hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct input_dev *dev = hidinput->input;
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int error;
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if (list_empty(report_list)) {
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dev_err(&hid->dev, "no output report found\n");
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return -ENODEV;
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}
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report = list_entry(report_list->next, struct hid_report, list);
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if (report->maxfield < 1) {
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dev_err(&hid->dev, "output report is empty\n");
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return -ENODEV;
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}
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if (report->field[0]->report_count < 7) {
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dev_err(&hid->dev, "not enough values in the field\n");
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return -ENODEV;
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}
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lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL);
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if (!lg2ff)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, lg2ff, play_effect);
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if (error) {
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kfree(lg2ff);
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return error;
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}
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lg2ff->report = report;
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report->field[0]->value[0] = 0xf3;
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report->field[0]->value[1] = 0x00;
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report->field[0]->value[2] = 0x00;
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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] = 0x00;
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report->field[0]->value[6] = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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dev_info(&hid->dev, "Force feedback for Logitech Rumblepad 2 by "
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"Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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