GNU Linux-libre 4.4.289-gnu1
[releases.git] / drivers / hid / hid-gaff.c
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/hid.h>
33 #include <linux/module.h>
34 #include "hid-ids.h"
35
36 #ifdef CONFIG_GREENASIA_FF
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         hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
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         hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
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;
81         struct list_head *report_list =
82                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
83         struct list_head *report_ptr = report_list;
84         struct input_dev *dev;
85         int error;
86
87         if (list_empty(&hid->inputs)) {
88                 hid_err(hid, "no inputs found\n");
89                 return -ENODEV;
90         }
91         hidinput = list_entry(hid->inputs.next, struct hid_input, list);
92         dev = hidinput->input;
93
94         if (list_empty(report_list)) {
95                 hid_err(hid, "no output reports found\n");
96                 return -ENODEV;
97         }
98
99         report_ptr = report_ptr->next;
100
101         report = list_entry(report_ptr, struct hid_report, list);
102         if (report->maxfield < 1) {
103                 hid_err(hid, "no fields in the report\n");
104                 return -ENODEV;
105         }
106
107         if (report->field[0]->report_count < 6) {
108                 hid_err(hid, "not enough values in the field\n");
109                 return -ENODEV;
110         }
111
112         gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
113         if (!gaff)
114                 return -ENOMEM;
115
116         set_bit(FF_RUMBLE, dev->ffbit);
117
118         error = input_ff_create_memless(dev, gaff, hid_gaff_play);
119         if (error) {
120                 kfree(gaff);
121                 return error;
122         }
123
124         gaff->report = report;
125         gaff->report->field[0]->value[0] = 0x51;
126         gaff->report->field[0]->value[1] = 0x00;
127         gaff->report->field[0]->value[2] = 0x00;
128         gaff->report->field[0]->value[3] = 0x00;
129         hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
130
131         gaff->report->field[0]->value[0] = 0xfa;
132         gaff->report->field[0]->value[1] = 0xfe;
133
134         hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
135
136         hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
137
138         return 0;
139 }
140 #else
141 static inline int gaff_init(struct hid_device *hdev)
142 {
143         return 0;
144 }
145 #endif
146
147 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
148 {
149         int ret;
150
151         dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
152
153         ret = hid_parse(hdev);
154         if (ret) {
155                 hid_err(hdev, "parse failed\n");
156                 goto err;
157         }
158
159         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
160         if (ret) {
161                 hid_err(hdev, "hw start failed\n");
162                 goto err;
163         }
164
165         gaff_init(hdev);
166
167         return 0;
168 err:
169         return ret;
170 }
171
172 static const struct hid_device_id ga_devices[] = {
173         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012),  },
174         { }
175 };
176 MODULE_DEVICE_TABLE(hid, ga_devices);
177
178 static struct hid_driver ga_driver = {
179         .name = "greenasia",
180         .id_table = ga_devices,
181         .probe = ga_probe,
182 };
183 module_hid_driver(ga_driver);
184
185 MODULE_LICENSE("GPL");