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/slab.h>
32 #include <linux/usb.h>
33 #include <linux/hid.h>
34 #include <linux/module.h>
35 #include "hid-ids.h"
36
37 #ifdef CONFIG_GREENASIA_FF
38 #include "usbhid/usbhid.h"
39
40 struct gaff_device {
41 struct hid_report *report;
42 };
43
hid_gaff_play(struct input_dev * dev,void * data,struct ff_effect * effect)44 static int hid_gaff_play(struct input_dev *dev, void *data,
45 struct ff_effect *effect)
46 {
47 struct hid_device *hid = input_get_drvdata(dev);
48 struct gaff_device *gaff = data;
49 int left, right;
50
51 left = effect->u.rumble.strong_magnitude;
52 right = effect->u.rumble.weak_magnitude;
53
54 dbg_hid("called with 0x%04x 0x%04x", left, right);
55
56 left = left * 0xfe / 0xffff;
57 right = right * 0xfe / 0xffff;
58
59 gaff->report->field[0]->value[0] = 0x51;
60 gaff->report->field[0]->value[1] = 0x0;
61 gaff->report->field[0]->value[2] = right;
62 gaff->report->field[0]->value[3] = 0;
63 gaff->report->field[0]->value[4] = left;
64 gaff->report->field[0]->value[5] = 0;
65 dbg_hid("running with 0x%02x 0x%02x", left, right);
66 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
67
68 gaff->report->field[0]->value[0] = 0xfa;
69 gaff->report->field[0]->value[1] = 0xfe;
70 gaff->report->field[0]->value[2] = 0x0;
71 gaff->report->field[0]->value[4] = 0x0;
72
73 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
74
75 return 0;
76 }
77
gaff_init(struct hid_device * hid)78 static int gaff_init(struct hid_device *hid)
79 {
80 struct gaff_device *gaff;
81 struct hid_report *report;
82 struct hid_input *hidinput = list_entry(hid->inputs.next,
83 struct hid_input, list);
84 struct list_head *report_list =
85 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
86 struct list_head *report_ptr = report_list;
87 struct input_dev *dev = hidinput->input;
88 int error;
89
90 if (list_empty(report_list)) {
91 hid_err(hid, "no output reports found\n");
92 return -ENODEV;
93 }
94
95 report_ptr = report_ptr->next;
96
97 report = list_entry(report_ptr, struct hid_report, list);
98 if (report->maxfield < 1) {
99 hid_err(hid, "no fields in the report\n");
100 return -ENODEV;
101 }
102
103 if (report->field[0]->report_count < 6) {
104 hid_err(hid, "not enough values in the field\n");
105 return -ENODEV;
106 }
107
108 gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
109 if (!gaff)
110 return -ENOMEM;
111
112 set_bit(FF_RUMBLE, dev->ffbit);
113
114 error = input_ff_create_memless(dev, gaff, hid_gaff_play);
115 if (error) {
116 kfree(gaff);
117 return error;
118 }
119
120 gaff->report = report;
121 gaff->report->field[0]->value[0] = 0x51;
122 gaff->report->field[0]->value[1] = 0x00;
123 gaff->report->field[0]->value[2] = 0x00;
124 gaff->report->field[0]->value[3] = 0x00;
125 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
126
127 gaff->report->field[0]->value[0] = 0xfa;
128 gaff->report->field[0]->value[1] = 0xfe;
129
130 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
131
132 hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
133
134 return 0;
135 }
136 #else
gaff_init(struct hid_device * hdev)137 static inline int gaff_init(struct hid_device *hdev)
138 {
139 return 0;
140 }
141 #endif
142
ga_probe(struct hid_device * hdev,const struct hid_device_id * id)143 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
144 {
145 int ret;
146
147 dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
148
149 ret = hid_parse(hdev);
150 if (ret) {
151 hid_err(hdev, "parse failed\n");
152 goto err;
153 }
154
155 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
156 if (ret) {
157 hid_err(hdev, "hw start failed\n");
158 goto err;
159 }
160
161 gaff_init(hdev);
162
163 return 0;
164 err:
165 return ret;
166 }
167
168 static const struct hid_device_id ga_devices[] = {
169 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), },
170 { }
171 };
172 MODULE_DEVICE_TABLE(hid, ga_devices);
173
174 static struct hid_driver ga_driver = {
175 .name = "greenasia",
176 .id_table = ga_devices,
177 .probe = ga_probe,
178 };
179
ga_init(void)180 static int __init ga_init(void)
181 {
182 return hid_register_driver(&ga_driver);
183 }
184
ga_exit(void)185 static void __exit ga_exit(void)
186 {
187 hid_unregister_driver(&ga_driver);
188 }
189
190 module_init(ga_init);
191 module_exit(ga_exit);
192 MODULE_LICENSE("GPL");
193