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c17f9c90 AH |
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/usb.h> | |
26 | #include <linux/hid.h> | |
606bd0a8 JS |
27 | |
28 | #include "usbhid/usbhid.h" | |
29 | #include "hid-lg.h" | |
c17f9c90 AH |
30 | |
31 | struct lg2ff_device { | |
32 | struct hid_report *report; | |
33 | }; | |
34 | ||
35 | static int play_effect(struct input_dev *dev, void *data, | |
36 | struct ff_effect *effect) | |
37 | { | |
38 | struct hid_device *hid = input_get_drvdata(dev); | |
39 | struct lg2ff_device *lg2ff = data; | |
40 | int weak, strong; | |
41 | ||
42 | strong = effect->u.rumble.strong_magnitude; | |
43 | weak = effect->u.rumble.weak_magnitude; | |
44 | ||
45 | if (weak || strong) { | |
46 | weak = weak * 0xff / 0xffff; | |
47 | strong = strong * 0xff / 0xffff; | |
48 | ||
49 | lg2ff->report->field[0]->value[0] = 0x51; | |
50 | lg2ff->report->field[0]->value[2] = weak; | |
51 | lg2ff->report->field[0]->value[4] = strong; | |
52 | } else { | |
53 | lg2ff->report->field[0]->value[0] = 0xf3; | |
54 | lg2ff->report->field[0]->value[2] = 0x00; | |
55 | lg2ff->report->field[0]->value[4] = 0x00; | |
56 | } | |
57 | ||
58 | usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT); | |
59 | return 0; | |
60 | } | |
61 | ||
606bd0a8 | 62 | int lg2ff_init(struct hid_device *hid) |
c17f9c90 AH |
63 | { |
64 | struct lg2ff_device *lg2ff; | |
65 | struct hid_report *report; | |
66 | struct hid_input *hidinput = list_entry(hid->inputs.next, | |
67 | struct hid_input, list); | |
68 | struct list_head *report_list = | |
69 | &hid->report_enum[HID_OUTPUT_REPORT].report_list; | |
70 | struct input_dev *dev = hidinput->input; | |
71 | int error; | |
72 | ||
73 | if (list_empty(report_list)) { | |
79575019 | 74 | dev_err(&hid->dev, "no output report found\n"); |
c17f9c90 AH |
75 | return -ENODEV; |
76 | } | |
77 | ||
78 | report = list_entry(report_list->next, struct hid_report, list); | |
79 | ||
80 | if (report->maxfield < 1) { | |
79575019 | 81 | dev_err(&hid->dev, "output report is empty\n"); |
c17f9c90 AH |
82 | return -ENODEV; |
83 | } | |
84 | if (report->field[0]->report_count < 7) { | |
79575019 | 85 | dev_err(&hid->dev, "not enough values in the field\n"); |
c17f9c90 AH |
86 | return -ENODEV; |
87 | } | |
88 | ||
89 | lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); | |
90 | if (!lg2ff) | |
91 | return -ENOMEM; | |
92 | ||
93 | set_bit(FF_RUMBLE, dev->ffbit); | |
94 | ||
95 | error = input_ff_create_memless(dev, lg2ff, play_effect); | |
96 | if (error) { | |
97 | kfree(lg2ff); | |
98 | return error; | |
99 | } | |
100 | ||
101 | lg2ff->report = report; | |
102 | report->field[0]->value[0] = 0xf3; | |
103 | report->field[0]->value[1] = 0x00; | |
104 | report->field[0]->value[2] = 0x00; | |
105 | report->field[0]->value[3] = 0x00; | |
106 | report->field[0]->value[4] = 0x00; | |
107 | report->field[0]->value[5] = 0x00; | |
108 | report->field[0]->value[6] = 0x00; | |
109 | ||
110 | usbhid_submit_report(hid, report, USB_DIR_OUT); | |
111 | ||
79575019 | 112 | dev_info(&hid->dev, "Force feedback for Logitech Rumblepad 2 by " |
c17f9c90 AH |
113 | "Anssi Hannula <anssi.hannula@gmail.com>\n"); |
114 | ||
115 | return 0; | |
116 | } |