Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[linux-2.6.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/usb.h>
33 #include <linux/hid.h>
34 #include "hid-ids.h"
35
36 #ifdef CONFIG_GREENASIA_FF
37 #include "usbhid/usbhid.h"
38
39 struct gaff_device {
40         struct hid_report *report;
41 };
42
43 static int hid_gaff_play(struct input_dev *dev, void *data,
44                          struct ff_effect *effect)
45 {
46         struct hid_device *hid = input_get_drvdata(dev);
47         struct gaff_device *gaff = data;
48         int left, right;
49
50         left = effect->u.rumble.strong_magnitude;
51         right = effect->u.rumble.weak_magnitude;
52
53         dbg_hid("called with 0x%04x 0x%04x", left, right);
54
55         left = left * 0xfe / 0xffff;
56         right = right * 0xfe / 0xffff;
57
58         gaff->report->field[0]->value[0] = 0x51;
59         gaff->report->field[0]->value[1] = 0x0;
60         gaff->report->field[0]->value[2] = right;
61         gaff->report->field[0]->value[3] = 0;
62         gaff->report->field[0]->value[4] = left;
63         gaff->report->field[0]->value[5] = 0;
64         dbg_hid("running with 0x%02x 0x%02x", left, right);
65         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
66
67         gaff->report->field[0]->value[0] = 0xfa;
68         gaff->report->field[0]->value[1] = 0xfe;
69         gaff->report->field[0]->value[2] = 0x0;
70         gaff->report->field[0]->value[4] = 0x0;
71
72         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
73
74         return 0;
75 }
76
77 static int gaff_init(struct hid_device *hid)
78 {
79         struct gaff_device *gaff;
80         struct hid_report *report;
81         struct hid_input *hidinput = list_entry(hid->inputs.next,
82                                                 struct hid_input, list);
83         struct list_head *report_list =
84                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
85         struct list_head *report_ptr = report_list;
86         struct input_dev *dev = hidinput->input;
87         int error;
88
89         if (list_empty(report_list)) {
90                 dev_err(&hid->dev, "no output reports found\n");
91                 return -ENODEV;
92         }
93
94         report_ptr = report_ptr->next;
95
96         report = list_entry(report_ptr, struct hid_report, list);
97         if (report->maxfield < 1) {
98                 dev_err(&hid->dev, "no fields in the report\n");
99                 return -ENODEV;
100         }
101
102         if (report->field[0]->report_count < 6) {
103                 dev_err(&hid->dev, "not enough values in the field\n");
104                 return -ENODEV;
105         }
106
107         gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
108         if (!gaff)
109                 return -ENOMEM;
110
111         set_bit(FF_RUMBLE, dev->ffbit);
112
113         error = input_ff_create_memless(dev, gaff, hid_gaff_play);
114         if (error) {
115                 kfree(gaff);
116                 return error;
117         }
118
119         gaff->report = report;
120         gaff->report->field[0]->value[0] = 0x51;
121         gaff->report->field[0]->value[1] = 0x00;
122         gaff->report->field[0]->value[2] = 0x00;
123         gaff->report->field[0]->value[3] = 0x00;
124         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
125
126         gaff->report->field[0]->value[0] = 0xfa;
127         gaff->report->field[0]->value[1] = 0xfe;
128
129         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
130
131         dev_info(&hid->dev, "Force Feedback for GreenAsia 0x12"
132                " devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
133
134         return 0;
135 }
136 #else
137 static inline int gaff_init(struct hid_device *hdev)
138 {
139         return 0;
140 }
141 #endif
142
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                 dev_err(&hdev->dev, "parse failed\n");
152                 goto err;
153         }
154
155         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
156         if (ret) {
157                 dev_err(&hdev->dev, "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
180 static int __init ga_init(void)
181 {
182         return hid_register_driver(&ga_driver);
183 }
184
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");