1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Force feedback support for GreenAsia (Product ID 0x12) based devices |
4 | * |
5 | * The devices are distributed under various names and the same USB device ID |
6 | * can be used in many game controllers. |
7 | * |
8 | * 0e8f:0012 "GreenAsia Inc. USB Joystick " |
9 | * - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635. |
10 | * |
11 | * Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info> |
12 | */ |
13 | |
14 | /* |
15 | */ |
16 | |
17 | #include <linux/input.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/hid.h> |
20 | #include <linux/module.h> |
21 | #include "hid-ids.h" |
22 | |
23 | #ifdef CONFIG_GREENASIA_FF |
24 | |
25 | struct gaff_device { |
26 | struct hid_report *report; |
27 | }; |
28 | |
29 | static int hid_gaff_play(struct input_dev *dev, void *data, |
30 | struct ff_effect *effect) |
31 | { |
32 | struct hid_device *hid = input_get_drvdata(dev); |
33 | struct gaff_device *gaff = data; |
34 | int left, right; |
35 | |
36 | left = effect->u.rumble.strong_magnitude; |
37 | right = effect->u.rumble.weak_magnitude; |
38 | |
39 | dbg_hid("called with 0x%04x 0x%04x" , left, right); |
40 | |
41 | left = left * 0xfe / 0xffff; |
42 | right = right * 0xfe / 0xffff; |
43 | |
44 | gaff->report->field[0]->value[0] = 0x51; |
45 | gaff->report->field[0]->value[1] = 0x0; |
46 | gaff->report->field[0]->value[2] = right; |
47 | gaff->report->field[0]->value[3] = 0; |
48 | gaff->report->field[0]->value[4] = left; |
49 | gaff->report->field[0]->value[5] = 0; |
50 | dbg_hid("running with 0x%02x 0x%02x" , left, right); |
51 | hid_hw_request(hdev: hid, report: gaff->report, reqtype: HID_REQ_SET_REPORT); |
52 | |
53 | gaff->report->field[0]->value[0] = 0xfa; |
54 | gaff->report->field[0]->value[1] = 0xfe; |
55 | gaff->report->field[0]->value[2] = 0x0; |
56 | gaff->report->field[0]->value[4] = 0x0; |
57 | |
58 | hid_hw_request(hdev: hid, report: gaff->report, reqtype: HID_REQ_SET_REPORT); |
59 | |
60 | return 0; |
61 | } |
62 | |
63 | static int gaff_init(struct hid_device *hid) |
64 | { |
65 | struct gaff_device *gaff; |
66 | struct hid_report *report; |
67 | struct hid_input *hidinput; |
68 | struct list_head *report_list = |
69 | &hid->report_enum[HID_OUTPUT_REPORT].report_list; |
70 | struct list_head *report_ptr = report_list; |
71 | struct input_dev *dev; |
72 | int error; |
73 | |
74 | if (list_empty(head: &hid->inputs)) { |
75 | hid_err(hid, "no inputs found\n" ); |
76 | return -ENODEV; |
77 | } |
78 | hidinput = list_entry(hid->inputs.next, struct hid_input, list); |
79 | dev = hidinput->input; |
80 | |
81 | if (list_empty(head: report_list)) { |
82 | hid_err(hid, "no output reports found\n" ); |
83 | return -ENODEV; |
84 | } |
85 | |
86 | report_ptr = report_ptr->next; |
87 | |
88 | report = list_entry(report_ptr, struct hid_report, list); |
89 | if (report->maxfield < 1) { |
90 | hid_err(hid, "no fields in the report\n" ); |
91 | return -ENODEV; |
92 | } |
93 | |
94 | if (report->field[0]->report_count < 6) { |
95 | hid_err(hid, "not enough values in the field\n" ); |
96 | return -ENODEV; |
97 | } |
98 | |
99 | gaff = kzalloc(size: sizeof(struct gaff_device), GFP_KERNEL); |
100 | if (!gaff) |
101 | return -ENOMEM; |
102 | |
103 | set_bit(FF_RUMBLE, addr: dev->ffbit); |
104 | |
105 | error = input_ff_create_memless(dev, data: gaff, play_effect: hid_gaff_play); |
106 | if (error) { |
107 | kfree(objp: gaff); |
108 | return error; |
109 | } |
110 | |
111 | gaff->report = report; |
112 | gaff->report->field[0]->value[0] = 0x51; |
113 | gaff->report->field[0]->value[1] = 0x00; |
114 | gaff->report->field[0]->value[2] = 0x00; |
115 | gaff->report->field[0]->value[3] = 0x00; |
116 | hid_hw_request(hdev: hid, report: gaff->report, reqtype: HID_REQ_SET_REPORT); |
117 | |
118 | gaff->report->field[0]->value[0] = 0xfa; |
119 | gaff->report->field[0]->value[1] = 0xfe; |
120 | |
121 | hid_hw_request(hdev: hid, report: gaff->report, reqtype: HID_REQ_SET_REPORT); |
122 | |
123 | hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n" ); |
124 | |
125 | return 0; |
126 | } |
127 | #else |
128 | static inline int gaff_init(struct hid_device *hdev) |
129 | { |
130 | return 0; |
131 | } |
132 | #endif |
133 | |
134 | static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id) |
135 | { |
136 | int ret; |
137 | |
138 | dev_dbg(&hdev->dev, "Greenasia HID hardware probe..." ); |
139 | |
140 | ret = hid_parse(hdev); |
141 | if (ret) { |
142 | hid_err(hdev, "parse failed\n" ); |
143 | goto err; |
144 | } |
145 | |
146 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); |
147 | if (ret) { |
148 | hid_err(hdev, "hw start failed\n" ); |
149 | goto err; |
150 | } |
151 | |
152 | gaff_init(hid: hdev); |
153 | |
154 | return 0; |
155 | err: |
156 | return ret; |
157 | } |
158 | |
159 | static const struct hid_device_id ga_devices[] = { |
160 | { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), }, |
161 | { } |
162 | }; |
163 | MODULE_DEVICE_TABLE(hid, ga_devices); |
164 | |
165 | static struct hid_driver ga_driver = { |
166 | .name = "greenasia" , |
167 | .id_table = ga_devices, |
168 | .probe = ga_probe, |
169 | }; |
170 | module_hid_driver(ga_driver); |
171 | |
172 | MODULE_LICENSE("GPL" ); |
173 | |