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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Force feedback support for PantherLord/GreenAsia 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 * 0810:0001 "Twin USB Joystick"
9 * - tested with PantherLord USB/PS2 2in1 Adapter
10 * - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
11 *
12 * 0e8f:0003 "GreenAsia Inc. USB Joystick "
13 * - tested with König Gaming gamepad
14 *
15 * 0e8f:0003 "GASIA USB Gamepad"
16 * - another version of the König gamepad
17 *
18 * 0f30:0111 "Saitek Color Rumble Pad"
19 *
20 * Copyright (c) 2007, 2009 Anssi Hannula <[email protected]>
21 */
22
23/*
24 */
25
26
27#include <linux/input.h>
28#include <linux/slab.h>
29#include <linux/module.h>
30#include <linux/hid.h>
31
32#include "hid-ids.h"
33
34#ifdef CONFIG_PANTHERLORD_FF
35
36struct plff_device {
37 struct hid_report *report;
38 s32 maxval;
39 s32 *strong;
40 s32 *weak;
41};
42
43static int hid_plff_play(struct input_dev *dev, void *data,
44 struct ff_effect *effect)
45{
46 struct hid_device *hid = input_get_drvdata(dev);
47 struct plff_device *plff = data;
48 int left, right;
49
50 left = effect->u.rumble.strong_magnitude;
51 right = effect->u.rumble.weak_magnitude;
52 hid_dbg(dev, "called with 0x%04x 0x%04x", left, right);
53
54 left = left * plff->maxval / 0xffff;
55 right = right * plff->maxval / 0xffff;
56
57 *plff->strong = left;
58 *plff->weak = right;
59 hid_dbg(dev, "running with 0x%02x 0x%02x", left, right);
60 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
61
62 return 0;
63}
64
65static int pl_input_configured(struct hid_device *hid, struct hid_input *hidinput)
66{
67 struct plff_device *plff;
68 struct hid_report *report;
69 struct list_head *report_list =
70 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
71 struct input_dev *dev = hidinput->input;
72 int error;
73 s32 maxval;
74 s32 *strong;
75 s32 *weak;
76
77 /* The device contains one output report per physical device, all
78 containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
79 absolute values.
80
81 The input reports also contain a field which contains
82 8 ff00.0001 usages and 8 boolean values. Their meaning is
83 currently unknown.
84
85 A version of the 0e8f:0003 exists that has all the values in
86 separate fields and misses the extra input field, thus resembling
87 Zeroplus (hid-zpff) devices.
88 */
89
90 if (!list_is_first(&hidinput->list, &hid->inputs))
91 return 0;
92
93 report = list_first_entry_or_null(report_list, struct hid_report, list);
94 if (!report) {
95 hid_err(hid, "no output reports found\n");
96 return -ENODEV;
97 }
98 if (report->maxfield < 1) {
99 hid_err(hid, "no fields in the report\n");
100 return -ENODEV;
101 }
102
103 maxval = 0x7f;
104 if (report->field[0]->report_count >= 4) {
105 report->field[0]->value[0] = 0x00;
106 report->field[0]->value[1] = 0x00;
107 strong = &report->field[0]->value[2];
108 weak = &report->field[0]->value[3];
109 hid_dbg(hid, "detected single-field device");
110 } else if (report->field[0]->maxusage == 1 &&
111 report->field[0]->usage[0].hid ==
112 (HID_UP_LED | 0x43) &&
113 report->maxfield >= 4 &&
114 report->field[0]->report_count >= 1 &&
115 report->field[1]->report_count >= 1 &&
116 report->field[2]->report_count >= 1 &&
117 report->field[3]->report_count >= 1) {
118 report->field[0]->value[0] = 0x00;
119 report->field[1]->value[0] = 0x00;
120 strong = &report->field[2]->value[0];
121 weak = &report->field[3]->value[0];
122 if (hid->vendor == USB_VENDOR_ID_JESS2)
123 maxval = 0xff;
124 hid_dbg(hid, "detected 4-field device");
125 } else {
126 hid_err(hid, "not enough fields or values\n");
127 return -ENODEV;
128 }
129
130 plff = kzalloc_obj(struct plff_device);
131 if (!plff)
132 return -ENOMEM;
133
134 dev = hidinput->input;
135
136 set_bit(FF_RUMBLE, dev->ffbit);
137
138 error = input_ff_create_memless(dev, plff, hid_plff_play);
139 if (error) {
140 kfree(plff);
141 return error;
142 }
143
144 plff->report = report;
145 plff->strong = strong;
146 plff->weak = weak;
147 plff->maxval = maxval;
148
149 *strong = 0x00;
150 *weak = 0x00;
151 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
152
153 return 0;
154}
155#else
156static inline int pl_input_configured(struct hid_device *hid,
157 struct hid_input *hidinput)
158{
159 return 0;
160}
161#endif
162
163static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
164{
165 int ret;
166
167 if (id->driver_data)
168 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
169
170 ret = hid_parse(hdev);
171 if (ret) {
172 hid_err(hdev, "parse failed\n");
173 return ret;
174 }
175
176 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
177 if (ret) {
178 hid_err(hdev, "hw start failed\n");
179 return ret;
180 }
181
182 return 0;
183}
184static const struct hid_device_id pl_devices[] = {
185 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
186 .driver_data = 1 }, /* Twin USB Joystick */
187 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
188 .driver_data = 1 }, /* Twin USB Joystick */
189 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), },
190 { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), },
191 { }
192};
193MODULE_DEVICE_TABLE(hid, pl_devices);
194
195static struct hid_driver pl_driver = {
196 .name = "pantherlord",
197 .id_table = pl_devices,
198 .probe = pl_probe,
199 .input_configured = pl_input_configured,
200};
201module_hid_driver(pl_driver);
202
203MODULE_DESCRIPTION("Force feedback support for PantherLord/GreenAsia based devices");
204MODULE_LICENSE("GPL");