net: wireless: bcmdhd: Fix P2P driver crash for MFG firmware
[linux-2.6.git] / drivers / hid / hid-axff.c
1 /*
2  * Force feedback support for ACRUX game controllers
3  *
4  * From what I have gathered, these devices are mass produced in China
5  * by several vendors. They often share the same design as the original
6  * Xbox 360 controller.
7  *
8  * 1a34:0802 "ACRUX USB GAMEPAD 8116"
9  *  - tested with a EXEQ EQ-PCU-02090 game controller.
10  *
11  * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru>
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
35 #include "hid-ids.h"
36
37 #ifdef CONFIG_HID_ACRUX_FF
38 #include "usbhid/usbhid.h"
39
40 struct axff_device {
41         struct hid_report *report;
42 };
43
44 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
45 {
46         struct hid_device *hid = input_get_drvdata(dev);
47         struct axff_device *axff = 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 * 0xff / 0xffff;
56         right = right * 0xff / 0xffff;
57
58         axff->report->field[0]->value[0] = left;
59         axff->report->field[1]->value[0] = right;
60         axff->report->field[2]->value[0] = left;
61         axff->report->field[3]->value[0] = right;
62         dbg_hid("running with 0x%02x 0x%02x", left, right);
63         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
64
65         return 0;
66 }
67
68 static int axff_init(struct hid_device *hid)
69 {
70         struct axff_device *axff;
71         struct hid_report *report;
72         struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
73         struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
74         struct input_dev *dev = hidinput->input;
75         int error;
76
77         if (list_empty(report_list)) {
78                 hid_err(hid, "no output reports found\n");
79                 return -ENODEV;
80         }
81
82         report = list_first_entry(report_list, struct hid_report, list);
83
84         if (report->maxfield < 4) {
85                 hid_err(hid, "no fields in the report: %d\n", report->maxfield);
86                 return -ENODEV;
87         }
88
89         axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
90         if (!axff)
91                 return -ENOMEM;
92
93         set_bit(FF_RUMBLE, dev->ffbit);
94
95         error = input_ff_create_memless(dev, axff, axff_play);
96         if (error)
97                 goto err_free_mem;
98
99         axff->report = report;
100         axff->report->field[0]->value[0] = 0x00;
101         axff->report->field[1]->value[0] = 0x00;
102         axff->report->field[2]->value[0] = 0x00;
103         axff->report->field[3]->value[0] = 0x00;
104         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
105
106         hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun<x0r@dv-life.ru>\n");
107
108         return 0;
109
110 err_free_mem:
111         kfree(axff);
112         return error;
113 }
114 #else
115 static inline int axff_init(struct hid_device *hid)
116 {
117         return 0;
118 }
119 #endif
120
121 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
122 {
123         int error;
124
125         dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n");
126
127         error = hid_parse(hdev);
128         if (error) {
129                 hid_err(hdev, "parse failed\n");
130                 return error;
131         }
132
133         error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
134         if (error) {
135                 hid_err(hdev, "hw start failed\n");
136                 return error;
137         }
138
139         error = axff_init(hdev);
140         if (error) {
141                 /*
142                  * Do not fail device initialization completely as device
143                  * may still be partially operable, just warn.
144                  */
145                 hid_warn(hdev,
146                          "Failed to enable force feedback support, error: %d\n",
147                          error);
148         }
149
150         /*
151          * We need to start polling device right away, otherwise
152          * it will go into a coma.
153          */
154         error = hid_hw_open(hdev);
155         if (error) {
156                 dev_err(&hdev->dev, "hw open failed\n");
157                 hid_hw_stop(hdev);
158                 return error;
159         }
160
161         return 0;
162 }
163
164 static void ax_remove(struct hid_device *hdev)
165 {
166         hid_hw_close(hdev);
167         hid_hw_stop(hdev);
168 }
169
170 static const struct hid_device_id ax_devices[] = {
171         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
172         { }
173 };
174 MODULE_DEVICE_TABLE(hid, ax_devices);
175
176 static struct hid_driver ax_driver = {
177         .name           = "acrux",
178         .id_table       = ax_devices,
179         .probe          = ax_probe,
180         .remove         = ax_remove,
181 };
182
183 static int __init ax_init(void)
184 {
185         return hid_register_driver(&ax_driver);
186 }
187
188 static void __exit ax_exit(void)
189 {
190         hid_unregister_driver(&ax_driver);
191 }
192
193 module_init(ax_init);
194 module_exit(ax_exit);
195
196 MODULE_AUTHOR("Sergei Kolzun");
197 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
198 MODULE_LICENSE("GPL");