Commit | Line | Data |
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c17f9c90 | 1 | /* |
2c6118e4 | 2 | * Force feedback support for Logitech RumblePad and Rumblepad 2 |
c17f9c90 AH |
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> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
c17f9c90 | 26 | #include <linux/hid.h> |
606bd0a8 | 27 | |
606bd0a8 | 28 | #include "hid-lg.h" |
c17f9c90 AH |
29 | |
30 | struct lg2ff_device { | |
31 | struct hid_report *report; | |
32 | }; | |
33 | ||
34 | static int play_effect(struct input_dev *dev, void *data, | |
35 | struct ff_effect *effect) | |
36 | { | |
37 | struct hid_device *hid = input_get_drvdata(dev); | |
38 | struct lg2ff_device *lg2ff = data; | |
39 | int weak, strong; | |
40 | ||
41 | strong = effect->u.rumble.strong_magnitude; | |
42 | weak = effect->u.rumble.weak_magnitude; | |
43 | ||
44 | if (weak || strong) { | |
45 | weak = weak * 0xff / 0xffff; | |
46 | strong = strong * 0xff / 0xffff; | |
47 | ||
48 | lg2ff->report->field[0]->value[0] = 0x51; | |
49 | lg2ff->report->field[0]->value[2] = weak; | |
50 | lg2ff->report->field[0]->value[4] = strong; | |
51 | } else { | |
52 | lg2ff->report->field[0]->value[0] = 0xf3; | |
53 | lg2ff->report->field[0]->value[2] = 0x00; | |
54 | lg2ff->report->field[0]->value[4] = 0x00; | |
55 | } | |
56 | ||
d8814272 | 57 | hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); |
c17f9c90 AH |
58 | return 0; |
59 | } | |
60 | ||
606bd0a8 | 61 | int lg2ff_init(struct hid_device *hid) |
c17f9c90 AH |
62 | { |
63 | struct lg2ff_device *lg2ff; | |
64 | struct hid_report *report; | |
65 | struct hid_input *hidinput = list_entry(hid->inputs.next, | |
66 | struct hid_input, list); | |
67 | struct list_head *report_list = | |
68 | &hid->report_enum[HID_OUTPUT_REPORT].report_list; | |
69 | struct input_dev *dev = hidinput->input; | |
70 | int error; | |
71 | ||
72 | if (list_empty(report_list)) { | |
4291ee30 | 73 | hid_err(hid, "no output report found\n"); |
c17f9c90 AH |
74 | return -ENODEV; |
75 | } | |
76 | ||
77 | report = list_entry(report_list->next, struct hid_report, list); | |
78 | ||
79 | if (report->maxfield < 1) { | |
4291ee30 | 80 | hid_err(hid, "output report is empty\n"); |
c17f9c90 AH |
81 | return -ENODEV; |
82 | } | |
83 | if (report->field[0]->report_count < 7) { | |
4291ee30 | 84 | hid_err(hid, "not enough values in the field\n"); |
c17f9c90 AH |
85 | return -ENODEV; |
86 | } | |
87 | ||
88 | lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); | |
89 | if (!lg2ff) | |
90 | return -ENOMEM; | |
91 | ||
92 | set_bit(FF_RUMBLE, dev->ffbit); | |
93 | ||
94 | error = input_ff_create_memless(dev, lg2ff, play_effect); | |
95 | if (error) { | |
96 | kfree(lg2ff); | |
97 | return error; | |
98 | } | |
99 | ||
100 | lg2ff->report = report; | |
101 | report->field[0]->value[0] = 0xf3; | |
102 | report->field[0]->value[1] = 0x00; | |
103 | report->field[0]->value[2] = 0x00; | |
104 | report->field[0]->value[3] = 0x00; | |
105 | report->field[0]->value[4] = 0x00; | |
106 | report->field[0]->value[5] = 0x00; | |
107 | report->field[0]->value[6] = 0x00; | |
108 | ||
d8814272 | 109 | hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
c17f9c90 | 110 | |
4291ee30 | 111 | hid_info(hid, "Force feedback for Logitech RumblePad/Rumblepad 2 by Anssi Hannula <anssi.hannula@gmail.com>\n"); |
c17f9c90 AH |
112 | |
113 | return 0; | |
114 | } |