1 /*
2 * Force feedback support for GreenAsia (Product ID 0x12) based devices
3 *
4 * The devices are distributed under various names and the same USB device ID
5 * can be used in many game controllers.
6 *
7 *
8 * 0e8f:0012 "GreenAsia Inc. USB Joystick "
9 * - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
10 *
11 * Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
12 */
13
14 /*
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 */
29
30 #include <linux/input.h>
31 #include <linux/usb.h>
32 #include <linux/hid.h>
33 #include "hid-ids.h"
34
35 #ifdef CONFIG_GREENASIA_FF
36 #include "usbhid/usbhid.h"
37
38 struct gaff_device {
39 struct hid_report *report;
40 };
41
42 static int hid_gaff_play(struct input_dev *dev, void *data,
43 struct ff_effect *effect)
44 {
45 struct hid_device *hid = input_get_drvdata(dev);
46 struct gaff_device *gaff = data;
47 int left, right;
48
49 left = effect->u.rumble.strong_magnitude;
50 right = effect->u.rumble.weak_magnitude;
51
52 dbg_hid("called with 0x%04x 0x%04x", left, right);
53
54 left = left * 0xfe / 0xffff;
55 right = right * 0xfe / 0xffff;
56
57 gaff->report->field[0]->value[0] = 0x51;
58 gaff->report->field[0]->value[1] = 0x0;
59 gaff->report->field[0]->value[2] = right;
60 gaff->report->field[0]->value[3] = 0;
61 gaff->report->field[0]->value[4] = left;
62 gaff->report->field[0]->value[5] = 0;
63 dbg_hid("running with 0x%02x 0x%02x", left, right);
64 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
65
66 gaff->report->field[0]->value[0] = 0xfa;
67 gaff->report->field[0]->value[1] = 0xfe;
68 gaff->report->field[0]->value[2] = 0x0;
69 gaff->report->field[0]->value[4] = 0x0;
70
71 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
72
73 return 0;
74 }
75
76 static int gaff_init(struct hid_device *hid)
77 {
78 struct gaff_device *gaff;
79 struct hid_report *report;
80 struct hid_input *hidinput = list_entry(hid->inputs.next,
81 struct hid_input, list);
82 struct list_head *report_list =
83 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
84 struct list_head *report_ptr = report_list;
85 struct input_dev *dev = hidinput->input;
86 int error;
87
88 if (list_empty(report_list)) {
89 dev_err(&hid->dev, "no output reports found\n");
90 return -ENODEV;
91 }
92
93 report_ptr = report_ptr->next;
94
95 report = list_entry(report_ptr, struct hid_report, list);
96 if (report->maxfield < 1) {
97 dev_err(&hid->dev, "no fields in the report\n");
98 return -ENODEV;
99 }
100
101 if (report->field[0]->report_count < 6) {
102 dev_err(&hid->dev, "not enough values in the field\n");
103 return -ENODEV;
104 }
105
106 gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
107 if (!gaff)
108 return -ENOMEM;
109
110 set_bit(FF_RUMBLE, dev->ffbit);
111
112 error = input_ff_create_memless(dev, gaff, hid_gaff_play);
113 if (error) {
114 kfree(gaff);
115 return error;
116 }
117
118 gaff->report = report;
119 gaff->report->field[0]->value[0] = 0x51;
120 gaff->report->field[0]->value[1] = 0x00;
121 gaff->report->field[0]->value[2] = 0x00;
122 gaff->report->field[0]->value[3] = 0x00;
123 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
124
125 gaff->report->field[0]->value[0] = 0xfa;
126 gaff->report->field[0]->value[1] = 0xfe;
127
128 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
129
130 dev_info(&hid->dev, "Force Feedback for GreenAsia 0x12"
131 " devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
132
133 return 0;
134 }
135 #else
136 static inline int gaff_init(struct hid_device *hdev)
137 {
138 return 0;
139 }
140 #endif
141
142 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
143 {
144 int ret;
145
146 dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
147
148 ret = hid_parse(hdev);
149 if (ret) {
150 dev_err(&hdev->dev, "parse failed\n");
151 goto err;
152 }
153
154 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
155 if (ret) {
156 dev_err(&hdev->dev, "hw start failed\n");
157 goto err;
158 }
159
160 gaff_init(hdev);
161
162 return 0;
163 err:
164 return ret;
165 }
166
167 static const struct hid_device_id ga_devices[] = {
168 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), },
169 { }
170 };
171 MODULE_DEVICE_TABLE(hid, ga_devices);
172
173 static struct hid_driver ga_driver = {
174 .name = "greenasia",
175 .id_table = ga_devices,
176 .probe = ga_probe,
177 };
178
179 static int __init ga_init(void)
180 {
181 return hid_register_driver(&ga_driver);
182 }
183
184 static void __exit ga_exit(void)
185 {
186 hid_unregister_driver(&ga_driver);
187 }
188
189 module_init(ga_init);
190 module_exit(ga_exit);
191 MODULE_LICENSE("GPL");
192
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