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Anssi Hannulac17f9c92008-04-01 01:51:11 +02001/*
2 * Force feedback support for Logitech Rumblepad 2
3 *
4 * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23
24#include <linux/input.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Anssi Hannulac17f9c92008-04-01 01:51:11 +020026#include <linux/usb.h>
27#include <linux/hid.h>
Jiri Slaby606bd0a2008-07-04 23:06:45 +020028
29#include "usbhid/usbhid.h"
30#include "hid-lg.h"
Anssi Hannulac17f9c92008-04-01 01:51:11 +020031
32struct lg2ff_device {
33 struct hid_report *report;
34};
35
36static int play_effect(struct input_dev *dev, void *data,
37 struct ff_effect *effect)
38{
39 struct hid_device *hid = input_get_drvdata(dev);
40 struct lg2ff_device *lg2ff = data;
41 int weak, strong;
42
43 strong = effect->u.rumble.strong_magnitude;
44 weak = effect->u.rumble.weak_magnitude;
45
46 if (weak || strong) {
47 weak = weak * 0xff / 0xffff;
48 strong = strong * 0xff / 0xffff;
49
50 lg2ff->report->field[0]->value[0] = 0x51;
51 lg2ff->report->field[0]->value[2] = weak;
52 lg2ff->report->field[0]->value[4] = strong;
53 } else {
54 lg2ff->report->field[0]->value[0] = 0xf3;
55 lg2ff->report->field[0]->value[2] = 0x00;
56 lg2ff->report->field[0]->value[4] = 0x00;
57 }
58
59 usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT);
60 return 0;
61}
62
Jiri Slaby606bd0a2008-07-04 23:06:45 +020063int lg2ff_init(struct hid_device *hid)
Anssi Hannulac17f9c92008-04-01 01:51:11 +020064{
65 struct lg2ff_device *lg2ff;
66 struct hid_report *report;
67 struct hid_input *hidinput = list_entry(hid->inputs.next,
68 struct hid_input, list);
69 struct list_head *report_list =
70 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
71 struct input_dev *dev = hidinput->input;
72 int error;
73
74 if (list_empty(report_list)) {
Jiri Slaby79575012008-09-18 12:23:34 +020075 dev_err(&hid->dev, "no output report found\n");
Anssi Hannulac17f9c92008-04-01 01:51:11 +020076 return -ENODEV;
77 }
78
79 report = list_entry(report_list->next, struct hid_report, list);
80
81 if (report->maxfield < 1) {
Jiri Slaby79575012008-09-18 12:23:34 +020082 dev_err(&hid->dev, "output report is empty\n");
Anssi Hannulac17f9c92008-04-01 01:51:11 +020083 return -ENODEV;
84 }
85 if (report->field[0]->report_count < 7) {
Jiri Slaby79575012008-09-18 12:23:34 +020086 dev_err(&hid->dev, "not enough values in the field\n");
Anssi Hannulac17f9c92008-04-01 01:51:11 +020087 return -ENODEV;
88 }
89
90 lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL);
91 if (!lg2ff)
92 return -ENOMEM;
93
94 set_bit(FF_RUMBLE, dev->ffbit);
95
96 error = input_ff_create_memless(dev, lg2ff, play_effect);
97 if (error) {
98 kfree(lg2ff);
99 return error;
100 }
101
102 lg2ff->report = report;
103 report->field[0]->value[0] = 0xf3;
104 report->field[0]->value[1] = 0x00;
105 report->field[0]->value[2] = 0x00;
106 report->field[0]->value[3] = 0x00;
107 report->field[0]->value[4] = 0x00;
108 report->field[0]->value[5] = 0x00;
109 report->field[0]->value[6] = 0x00;
110
111 usbhid_submit_report(hid, report, USB_DIR_OUT);
112
Jiri Slaby79575012008-09-18 12:23:34 +0200113 dev_info(&hid->dev, "Force feedback for Logitech Rumblepad 2 by "
Anssi Hannulac17f9c92008-04-01 01:51:11 +0200114 "Anssi Hannula <anssi.hannula@gmail.com>\n");
115
116 return 0;
117}