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24#include <linux/hid.h>
25#include <linux/input.h>
26#include <linux/slab.h>
27#include <linux/usb.h>
28
29#include "hid-ids.h"
30
31#ifdef CONFIG_ZEROPLUS_FF
32#include "usbhid/usbhid.h"
33
34struct zpff_device {
35 struct hid_report *report;
36};
37
38static int zpff_play(struct input_dev *dev, void *data,
39 struct ff_effect *effect)
40{
41 struct hid_device *hid = input_get_drvdata(dev);
42 struct zpff_device *zpff = data;
43 int left, right;
44
45
46
47
48
49
50
51 left = effect->u.rumble.strong_magnitude;
52 right = effect->u.rumble.weak_magnitude;
53 dbg_hid("called with 0x%04x 0x%04x\n", left, right);
54
55 left = left * 0x7f / 0xffff;
56 right = right * 0x7f / 0xffff;
57
58 zpff->report->field[2]->value[0] = left;
59 zpff->report->field[3]->value[0] = right;
60 dbg_hid("running with 0x%02x 0x%02x\n", left, right);
61 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
62
63 return 0;
64}
65
66static int zpff_init(struct hid_device *hid)
67{
68 struct zpff_device *zpff;
69 struct hid_report *report;
70 struct hid_input *hidinput = list_entry(hid->inputs.next,
71 struct hid_input, list);
72 struct list_head *report_list =
73 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
74 struct input_dev *dev = hidinput->input;
75 int error;
76
77 if (list_empty(report_list)) {
78 hid_err(hid, "no output report found\n");
79 return -ENODEV;
80 }
81
82 report = list_entry(report_list->next, struct hid_report, list);
83
84 if (report->maxfield < 4) {
85 hid_err(hid, "not enough fields in report\n");
86 return -ENODEV;
87 }
88
89 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
90 if (!zpff)
91 return -ENOMEM;
92
93 set_bit(FF_RUMBLE, dev->ffbit);
94
95 error = input_ff_create_memless(dev, zpff, zpff_play);
96 if (error) {
97 kfree(zpff);
98 return error;
99 }
100
101 zpff->report = report;
102 zpff->report->field[0]->value[0] = 0x00;
103 zpff->report->field[1]->value[0] = 0x02;
104 zpff->report->field[2]->value[0] = 0x00;
105 zpff->report->field[3]->value[0] = 0x00;
106 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
107
108 hid_info(hid, "force feedback for Zeroplus based devices by 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 hid_err(hdev, "parse failed\n");
126 goto err;
127 }
128
129 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
130 if (ret) {
131 hid_err(hdev, "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