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1 | /* |
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> |
25 | #include <linux/slab.h> |
26 | #include <linux/usb.h> |
27 | #include <linux/hid.h> |
28 | |
29 | #include "usbhid/usbhid.h" |
30 | #include "hid-lg.h" |
31 | |
32 | struct lg2ff_device { |
33 | struct hid_report *report; |
34 | }; |
35 | |
36 | static 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 | |
63 | int lg2ff_init(struct hid_device *hid) |
64 | { |
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)) { |
75 | dev_err(&hid->dev, "no output report found\n"); |
76 | return -ENODEV; |
77 | } |
78 | |
79 | report = list_entry(report_list->next, struct hid_report, list); |
80 | |
81 | if (report->maxfield < 1) { |
82 | dev_err(&hid->dev, "output report is empty\n"); |
83 | return -ENODEV; |
84 | } |
85 | if (report->field[0]->report_count < 7) { |
86 | dev_err(&hid->dev, "not enough values in the field\n"); |
87 | 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 | |
113 | dev_info(&hid->dev, "Force feedback for Logitech Rumblepad 2 by " |
114 | "Anssi Hannula <anssi.hannula@gmail.com>\n"); |
115 | |
116 | return 0; |
117 | } |
118 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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