Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c17f9c90 | 2 | /* |
2c6118e4 | 3 | * Force feedback support for Logitech RumblePad and Rumblepad 2 |
c17f9c90 AH |
4 | * |
5 | * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com> | |
6 | */ | |
7 | ||
8 | /* | |
c17f9c90 AH |
9 | */ |
10 | ||
11 | ||
12 | #include <linux/input.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
c17f9c90 | 14 | #include <linux/hid.h> |
606bd0a8 | 15 | |
606bd0a8 | 16 | #include "hid-lg.h" |
c17f9c90 AH |
17 | |
18 | struct lg2ff_device { | |
19 | struct hid_report *report; | |
20 | }; | |
21 | ||
22 | static int play_effect(struct input_dev *dev, void *data, | |
23 | struct ff_effect *effect) | |
24 | { | |
25 | struct hid_device *hid = input_get_drvdata(dev); | |
26 | struct lg2ff_device *lg2ff = data; | |
27 | int weak, strong; | |
28 | ||
29 | strong = effect->u.rumble.strong_magnitude; | |
30 | weak = effect->u.rumble.weak_magnitude; | |
31 | ||
32 | if (weak || strong) { | |
33 | weak = weak * 0xff / 0xffff; | |
34 | strong = strong * 0xff / 0xffff; | |
35 | ||
36 | lg2ff->report->field[0]->value[0] = 0x51; | |
37 | lg2ff->report->field[0]->value[2] = weak; | |
38 | lg2ff->report->field[0]->value[4] = strong; | |
39 | } else { | |
40 | lg2ff->report->field[0]->value[0] = 0xf3; | |
41 | lg2ff->report->field[0]->value[2] = 0x00; | |
42 | lg2ff->report->field[0]->value[4] = 0x00; | |
43 | } | |
44 | ||
d8814272 | 45 | hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); |
c17f9c90 AH |
46 | return 0; |
47 | } | |
48 | ||
606bd0a8 | 49 | int lg2ff_init(struct hid_device *hid) |
c17f9c90 AH |
50 | { |
51 | struct lg2ff_device *lg2ff; | |
52 | struct hid_report *report; | |
d9d4b1e4 AS |
53 | struct hid_input *hidinput; |
54 | struct input_dev *dev; | |
c17f9c90 AH |
55 | int error; |
56 | ||
d9d4b1e4 AS |
57 | if (list_empty(&hid->inputs)) { |
58 | hid_err(hid, "no inputs found\n"); | |
59 | return -ENODEV; | |
60 | } | |
61 | hidinput = list_entry(hid->inputs.next, struct hid_input, list); | |
62 | dev = hidinput->input; | |
63 | ||
0fb6bd06 KC |
64 | /* Check that the report looks ok */ |
65 | report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7); | |
66 | if (!report) | |
c17f9c90 | 67 | return -ENODEV; |
c17f9c90 AH |
68 | |
69 | lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); | |
70 | if (!lg2ff) | |
71 | return -ENOMEM; | |
72 | ||
73 | set_bit(FF_RUMBLE, dev->ffbit); | |
74 | ||
75 | error = input_ff_create_memless(dev, lg2ff, play_effect); | |
76 | if (error) { | |
77 | kfree(lg2ff); | |
78 | return error; | |
79 | } | |
80 | ||
81 | lg2ff->report = report; | |
82 | report->field[0]->value[0] = 0xf3; | |
83 | report->field[0]->value[1] = 0x00; | |
84 | report->field[0]->value[2] = 0x00; | |
85 | report->field[0]->value[3] = 0x00; | |
86 | report->field[0]->value[4] = 0x00; | |
87 | report->field[0]->value[5] = 0x00; | |
88 | report->field[0]->value[6] = 0x00; | |
89 | ||
d8814272 | 90 | hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
c17f9c90 | 91 | |
bd04363d | 92 | hid_info(hid, "Force feedback for Logitech variant 2 rumble devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); |
c17f9c90 AH |
93 | |
94 | return 0; | |
95 | } |