Merge tag 'trace-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[platform/kernel/linux-rpi.git] / drivers / hid / hid-betopff.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Force feedback support for Betop based devices
4  *
5  *  The devices are distributed under various names and the same USB device ID
6  *  can be used in both adapters and actual game controllers.
7  *
8  *  0x11c2:0x2208 "BTP2185 BFM mode Joystick"
9  *   - tested with BTP2185 BFM Mode.
10  *
11  *  0x11C0:0x5506 "BTP2185 PC mode Joystick"
12  *   - tested with BTP2185 PC Mode.
13  *
14  *  0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"
15  *   - tested with BTP2185 PC Mode with another version.
16  *
17  *  0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"
18  *   - tested with BTP2171s.
19  *  Copyright (c) 2014 Huang Bo <huangbobupt@163.com>
20  */
21
22 /*
23  */
24
25
26 #include <linux/input.h>
27 #include <linux/slab.h>
28 #include <linux/module.h>
29 #include <linux/hid.h>
30
31 #include "hid-ids.h"
32
33 struct betopff_device {
34         struct hid_report *report;
35 };
36
37 static int hid_betopff_play(struct input_dev *dev, void *data,
38                          struct ff_effect *effect)
39 {
40         struct hid_device *hid = input_get_drvdata(dev);
41         struct betopff_device *betopff = data;
42         __u16 left, right;
43
44         left = effect->u.rumble.strong_magnitude;
45         right = effect->u.rumble.weak_magnitude;
46
47         betopff->report->field[2]->value[0] = left / 256;
48         betopff->report->field[3]->value[0] = right / 256;
49
50         hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
51
52         return 0;
53 }
54
55 static int betopff_init(struct hid_device *hid)
56 {
57         struct betopff_device *betopff;
58         struct hid_report *report;
59         struct hid_input *hidinput =
60                         list_first_entry(&hid->inputs, struct hid_input, list);
61         struct list_head *report_list =
62                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
63         struct input_dev *dev = hidinput->input;
64         int field_count = 0;
65         int error;
66         int i, j;
67
68         if (list_empty(report_list)) {
69                 hid_err(hid, "no output reports found\n");
70                 return -ENODEV;
71         }
72
73         report = list_first_entry(report_list, struct hid_report, list);
74         /*
75          * Actually there are 4 fields for 4 Bytes as below:
76          * -----------------------------------------
77          * Byte0  Byte1  Byte2    Byte3
78          * 0x00   0x00   left_motor right_motor
79          * -----------------------------------------
80          * Do init them with default value.
81          */
82         for (i = 0; i < report->maxfield; i++) {
83                 for (j = 0; j < report->field[i]->report_count; j++) {
84                         report->field[i]->value[j] = 0x00;
85                         field_count++;
86                 }
87         }
88
89         if (field_count < 4) {
90                 hid_err(hid, "not enough fields in the report: %d\n",
91                                 field_count);
92                 return -ENODEV;
93         }
94
95         betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
96         if (!betopff)
97                 return -ENOMEM;
98
99         set_bit(FF_RUMBLE, dev->ffbit);
100
101         error = input_ff_create_memless(dev, betopff, hid_betopff_play);
102         if (error) {
103                 kfree(betopff);
104                 return error;
105         }
106
107         betopff->report = report;
108         hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
109
110         hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
111
112         return 0;
113 }
114
115 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
116 {
117         int ret;
118
119         if (id->driver_data)
120                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
121
122         ret = hid_parse(hdev);
123         if (ret) {
124                 hid_err(hdev, "parse failed\n");
125                 goto err;
126         }
127
128         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
129         if (ret) {
130                 hid_err(hdev, "hw start failed\n");
131                 goto err;
132         }
133
134         betopff_init(hdev);
135
136         return 0;
137 err:
138         return ret;
139 }
140
141 static const struct hid_device_id betop_devices[] = {
142         { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
143         { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
144         { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
145         { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
146         { }
147 };
148 MODULE_DEVICE_TABLE(hid, betop_devices);
149
150 static struct hid_driver betop_driver = {
151         .name = "betop",
152         .id_table = betop_devices,
153         .probe = betop_probe,
154 };
155 module_hid_driver(betop_driver);
156
157 MODULE_LICENSE("GPL");