1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24#include <linux/hid.h>
25#include <linux/input.h>
26#include <linux/usb.h>
27
28#include "hid-ids.h"
29
30#ifdef CONFIG_ZEROPLUS_FF
31#include "usbhid/usbhid.h"
32
33struct zpff_device {
34 struct hid_report *report;
35};
36
37static int zpff_play(struct input_dev *dev, void *data,
38 struct ff_effect *effect)
39{
40 struct hid_device *hid = input_get_drvdata(dev);
41 struct zpff_device *zpff = data;
42 int left, right;
43
44
45
46
47
48
49
50 left = effect->u.rumble.strong_magnitude;
51 right = effect->u.rumble.weak_magnitude;
52 dbg_hid("called with 0x%04x 0x%04x\n", left, right);
53
54 left = left * 0x7f / 0xffff;
55 right = right * 0x7f / 0xffff;
56
57 zpff->report->field[2]->value[0] = left;
58 zpff->report->field[3]->value[0] = right;
59 dbg_hid("running with 0x%02x 0x%02x\n", left, right);
60 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
61
62 return 0;
63}
64
65static int zpff_init(struct hid_device *hid)
66{
67 struct zpff_device *zpff;
68 struct hid_report *report;
69 struct hid_input *hidinput = list_entry(hid->inputs.next,
70 struct hid_input, list);
71 struct list_head *report_list =
72 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
73 struct input_dev *dev = hidinput->input;
74 int error;
75
76 if (list_empty(report_list)) {
77 dev_err(&hid->dev, "no output report found\n");
78 return -ENODEV;
79 }
80
81 report = list_entry(report_list->next, struct hid_report, list);
82
83 if (report->maxfield < 4) {
84 dev_err(&hid->dev, "not enough fields in report\n");
85 return -ENODEV;
86 }
87
88 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
89 if (!zpff)
90 return -ENOMEM;
91
92 set_bit(FF_RUMBLE, dev->ffbit);
93
94 error = input_ff_create_memless(dev, zpff, zpff_play);
95 if (error) {
96 kfree(zpff);
97 return error;
98 }
99
100 zpff->report = report;
101 zpff->report->field[0]->value[0] = 0x00;
102 zpff->report->field[1]->value[0] = 0x02;
103 zpff->report->field[2]->value[0] = 0x00;
104 zpff->report->field[3]->value[0] = 0x00;
105 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
106
107 dev_info(&hid->dev, "force feedback for Zeroplus based devices by "
108 "Anssi Hannula <anssi.hannula@gmail.com>\n");
109
110 return 0;
111}
112#else
113static inline int zpff_init(struct hid_device *hid)
114{
115 return 0;
116}
117#endif
118
119static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
120{
121 int ret;
122
123 ret = hid_parse(hdev);
124 if (ret) {
125 dev_err(&hdev->dev, "parse failed\n");
126 goto err;
127 }
128
129 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
130 if (ret) {
131 dev_err(&hdev->dev, "hw start failed\n");
132 goto err;
133 }
134
135 zpff_init(hdev);
136
137 return 0;
138err:
139 return ret;
140}
141
142static const struct hid_device_id zp_devices[] = {
143 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
144 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
145 { }
146};
147MODULE_DEVICE_TABLE(hid, zp_devices);
148
149static struct hid_driver zp_driver = {
150 .name = "zeroplus",
151 .id_table = zp_devices,
152 .probe = zp_probe,
153};
154
155static int __init zp_init(void)
156{
157 return hid_register_driver(&zp_driver);
158}
159
160static void __exit zp_exit(void)
161{
162 hid_unregister_driver(&zp_driver);
163}
164
165module_init(zp_init);
166module_exit(zp_exit);
167MODULE_LICENSE("GPL");
168