1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Force feedback support for ACRUX game controllers |
4 | * |
5 | * From what I have gathered, these devices are mass produced in China |
6 | * by several vendors. They often share the same design as the original |
7 | * Xbox 360 controller. |
8 | * |
9 | * 1a34:0802 "ACRUX USB GAMEPAD 8116" |
10 | * - tested with an EXEQ EQ-PCU-02090 game controller. |
11 | * |
12 | * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru> |
13 | */ |
14 | |
15 | /* |
16 | */ |
17 | |
18 | #include <linux/input.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/hid.h> |
21 | #include <linux/module.h> |
22 | |
23 | #include "hid-ids.h" |
24 | |
25 | #ifdef CONFIG_HID_ACRUX_FF |
26 | |
27 | struct axff_device { |
28 | struct hid_report *report; |
29 | }; |
30 | |
31 | static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) |
32 | { |
33 | struct hid_device *hid = input_get_drvdata(dev); |
34 | struct axff_device *axff = data; |
35 | struct hid_report *report = axff->report; |
36 | int field_count = 0; |
37 | int left, right; |
38 | int i, j; |
39 | |
40 | left = effect->u.rumble.strong_magnitude; |
41 | right = effect->u.rumble.weak_magnitude; |
42 | |
43 | dbg_hid("called with 0x%04x 0x%04x" , left, right); |
44 | |
45 | left = left * 0xff / 0xffff; |
46 | right = right * 0xff / 0xffff; |
47 | |
48 | for (i = 0; i < report->maxfield; i++) { |
49 | for (j = 0; j < report->field[i]->report_count; j++) { |
50 | report->field[i]->value[j] = |
51 | field_count % 2 ? right : left; |
52 | field_count++; |
53 | } |
54 | } |
55 | |
56 | dbg_hid("running with 0x%02x 0x%02x" , left, right); |
57 | hid_hw_request(hdev: hid, report: axff->report, reqtype: HID_REQ_SET_REPORT); |
58 | |
59 | return 0; |
60 | } |
61 | |
62 | static int axff_init(struct hid_device *hid) |
63 | { |
64 | struct axff_device *axff; |
65 | struct hid_report *report; |
66 | struct hid_input *hidinput; |
67 | struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; |
68 | struct input_dev *dev; |
69 | int field_count = 0; |
70 | int i, j; |
71 | int error; |
72 | |
73 | if (list_empty(head: &hid->inputs)) { |
74 | hid_err(hid, "no inputs found\n" ); |
75 | return -ENODEV; |
76 | } |
77 | hidinput = list_first_entry(&hid->inputs, struct hid_input, list); |
78 | dev = hidinput->input; |
79 | |
80 | if (list_empty(head: report_list)) { |
81 | hid_err(hid, "no output reports found\n" ); |
82 | return -ENODEV; |
83 | } |
84 | |
85 | report = list_first_entry(report_list, struct hid_report, list); |
86 | for (i = 0; i < report->maxfield; i++) { |
87 | for (j = 0; j < report->field[i]->report_count; j++) { |
88 | report->field[i]->value[j] = 0x00; |
89 | field_count++; |
90 | } |
91 | } |
92 | |
93 | if (field_count < 4 && hid->product != 0xf705) { |
94 | hid_err(hid, "not enough fields in the report: %d\n" , |
95 | field_count); |
96 | return -ENODEV; |
97 | } |
98 | |
99 | axff = kzalloc(size: sizeof(struct axff_device), GFP_KERNEL); |
100 | if (!axff) |
101 | return -ENOMEM; |
102 | |
103 | set_bit(FF_RUMBLE, addr: dev->ffbit); |
104 | |
105 | error = input_ff_create_memless(dev, data: axff, play_effect: axff_play); |
106 | if (error) |
107 | goto err_free_mem; |
108 | |
109 | axff->report = report; |
110 | hid_hw_request(hdev: hid, report: axff->report, reqtype: HID_REQ_SET_REPORT); |
111 | |
112 | hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n" ); |
113 | |
114 | return 0; |
115 | |
116 | err_free_mem: |
117 | kfree(objp: axff); |
118 | return error; |
119 | } |
120 | #else |
121 | static inline int axff_init(struct hid_device *hid) |
122 | { |
123 | return 0; |
124 | } |
125 | #endif |
126 | |
127 | static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) |
128 | { |
129 | int error; |
130 | |
131 | dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n" ); |
132 | |
133 | error = hid_parse(hdev); |
134 | if (error) { |
135 | hid_err(hdev, "parse failed\n" ); |
136 | return error; |
137 | } |
138 | |
139 | error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); |
140 | if (error) { |
141 | hid_err(hdev, "hw start failed\n" ); |
142 | return error; |
143 | } |
144 | |
145 | error = axff_init(hid: hdev); |
146 | if (error) { |
147 | /* |
148 | * Do not fail device initialization completely as device |
149 | * may still be partially operable, just warn. |
150 | */ |
151 | hid_warn(hdev, |
152 | "Failed to enable force feedback support, error: %d\n" , |
153 | error); |
154 | } |
155 | |
156 | /* |
157 | * We need to start polling device right away, otherwise |
158 | * it will go into a coma. |
159 | */ |
160 | error = hid_hw_open(hdev); |
161 | if (error) { |
162 | dev_err(&hdev->dev, "hw open failed\n" ); |
163 | hid_hw_stop(hdev); |
164 | return error; |
165 | } |
166 | |
167 | return 0; |
168 | } |
169 | |
170 | static void ax_remove(struct hid_device *hdev) |
171 | { |
172 | hid_hw_close(hdev); |
173 | hid_hw_stop(hdev); |
174 | } |
175 | |
176 | static const struct hid_device_id ax_devices[] = { |
177 | { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, |
178 | { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705), }, |
179 | { } |
180 | }; |
181 | MODULE_DEVICE_TABLE(hid, ax_devices); |
182 | |
183 | static struct hid_driver ax_driver = { |
184 | .name = "acrux" , |
185 | .id_table = ax_devices, |
186 | .probe = ax_probe, |
187 | .remove = ax_remove, |
188 | }; |
189 | module_hid_driver(ax_driver); |
190 | |
191 | MODULE_AUTHOR("Sergei Kolzun" ); |
192 | MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers" ); |
193 | MODULE_LICENSE("GPL" ); |
194 | |