Merge branch 'hid-battery' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy...
[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 <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
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
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
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                 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
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");