1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30#include <linux/input.h>
31#include <linux/slab.h>
32#include <linux/usb.h>
33#include <linux/hid.h>
34
35#include "hid-ids.h"
36
37#ifdef CONFIG_DRAGONRISE_FF
38#include "usbhid/usbhid.h"
39
40struct drff_device {
41 struct hid_report *report;
42};
43
44static int drff_play(struct input_dev *dev, void *data,
45 struct ff_effect *effect)
46{
47 struct hid_device *hid = input_get_drvdata(dev);
48 struct drff_device *drff = data;
49 int strong, weak;
50
51 strong = effect->u.rumble.strong_magnitude;
52 weak = effect->u.rumble.weak_magnitude;
53
54 dbg_hid("called with 0x%04x 0x%04x", strong, weak);
55
56 if (strong || weak) {
57 strong = strong * 0xff / 0xffff;
58 weak = weak * 0xff / 0xffff;
59
60
61
62
63 if (weak == 0x0a)
64 weak = 0x0b;
65
66 drff->report->field[0]->value[0] = 0x51;
67 drff->report->field[0]->value[1] = 0x00;
68 drff->report->field[0]->value[2] = weak;
69 drff->report->field[0]->value[4] = strong;
70 usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
71
72 drff->report->field[0]->value[0] = 0xfa;
73 drff->report->field[0]->value[1] = 0xfe;
74 } else {
75 drff->report->field[0]->value[0] = 0xf3;
76 drff->report->field[0]->value[1] = 0x00;
77 }
78
79 drff->report->field[0]->value[2] = 0x00;
80 drff->report->field[0]->value[4] = 0x00;
81 dbg_hid("running with 0x%02x 0x%02x", strong, weak);
82 usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
83
84 return 0;
85}
86
87static int drff_init(struct hid_device *hid)
88{
89 struct drff_device *drff;
90 struct hid_report *report;
91 struct hid_input *hidinput = list_first_entry(&hid->inputs,
92 struct hid_input, list);
93 struct list_head *report_list =
94 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
95 struct input_dev *dev = hidinput->input;
96 int error;
97
98 if (list_empty(report_list)) {
99 hid_err(hid, "no output reports found\n");
100 return -ENODEV;
101 }
102
103 report = list_first_entry(report_list, struct hid_report, list);
104 if (report->maxfield < 1) {
105 hid_err(hid, "no fields in the report\n");
106 return -ENODEV;
107 }
108
109 if (report->field[0]->report_count < 7) {
110 hid_err(hid, "not enough values in the field\n");
111 return -ENODEV;
112 }
113
114 drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL);
115 if (!drff)
116 return -ENOMEM;
117
118 set_bit(FF_RUMBLE, dev->ffbit);
119
120 error = input_ff_create_memless(dev, drff, drff_play);
121 if (error) {
122 kfree(drff);
123 return error;
124 }
125
126 drff->report = report;
127 drff->report->field[0]->value[0] = 0xf3;
128 drff->report->field[0]->value[1] = 0x00;
129 drff->report->field[0]->value[2] = 0x00;
130 drff->report->field[0]->value[3] = 0x00;
131 drff->report->field[0]->value[4] = 0x00;
132 drff->report->field[0]->value[5] = 0x00;
133 drff->report->field[0]->value[6] = 0x00;
134 usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
135
136 hid_info(hid, "Force Feedback for DragonRise Inc. "
137 "game controllers by Richard Walmsley <richwalm@gmail.com>\n");
138
139 return 0;
140}
141#else
142static inline int drff_init(struct hid_device *hid)
143{
144 return 0;
145}
146#endif
147
148static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
149{
150 int ret;
151
152 dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
153
154 ret = hid_parse(hdev);
155 if (ret) {
156 hid_err(hdev, "parse failed\n");
157 goto err;
158 }
159
160 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
161 if (ret) {
162 hid_err(hdev, "hw start failed\n");
163 goto err;
164 }
165
166 drff_init(hdev);
167
168 return 0;
169err:
170 return ret;
171}
172
173static const struct hid_device_id dr_devices[] = {
174 { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006), },
175 { }
176};
177MODULE_DEVICE_TABLE(hid, dr_devices);
178
179static struct hid_driver dr_driver = {
180 .name = "dragonrise",
181 .id_table = dr_devices,
182 .probe = dr_probe,
183};
184
185static int __init dr_init(void)
186{
187 return hid_register_driver(&dr_driver);
188}
189
190static void __exit dr_exit(void)
191{
192 hid_unregister_driver(&dr_driver);
193}
194
195module_init(dr_init);
196module_exit(dr_exit);
197MODULE_LICENSE("GPL");
198