Merge branch 'clk' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux...
[pandora-kernel.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 an 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         struct hid_report *report = axff->report;
49         int field_count = 0;
50         int left, right;
51         int i, j;
52
53         left = effect->u.rumble.strong_magnitude;
54         right = effect->u.rumble.weak_magnitude;
55
56         dbg_hid("called with 0x%04x 0x%04x", left, right);
57
58         left = left * 0xff / 0xffff;
59         right = right * 0xff / 0xffff;
60
61         for (i = 0; i < report->maxfield; i++) {
62                 for (j = 0; j < report->field[i]->report_count; j++) {
63                         report->field[i]->value[j] =
64                                 field_count % 2 ? right : left;
65                         field_count++;
66                 }
67         }
68
69         dbg_hid("running with 0x%02x 0x%02x", left, right);
70         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
71
72         return 0;
73 }
74
75 static int axff_init(struct hid_device *hid)
76 {
77         struct axff_device *axff;
78         struct hid_report *report;
79         struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
80         struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
81         struct input_dev *dev = hidinput->input;
82         int field_count = 0;
83         int i, j;
84         int error;
85
86         if (list_empty(report_list)) {
87                 hid_err(hid, "no output reports found\n");
88                 return -ENODEV;
89         }
90
91         report = list_first_entry(report_list, struct hid_report, list);
92         for (i = 0; i < report->maxfield; i++) {
93                 for (j = 0; j < report->field[i]->report_count; j++) {
94                         report->field[i]->value[j] = 0x00;
95                         field_count++;
96                 }
97         }
98
99         if (field_count < 4) {
100                 hid_err(hid, "not enough fields in the report: %d\n",
101                         field_count);
102                 return -ENODEV;
103         }
104
105         axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
106         if (!axff)
107                 return -ENOMEM;
108
109         set_bit(FF_RUMBLE, dev->ffbit);
110
111         error = input_ff_create_memless(dev, axff, axff_play);
112         if (error)
113                 goto err_free_mem;
114
115         axff->report = report;
116         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
117
118         hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n");
119
120         return 0;
121
122 err_free_mem:
123         kfree(axff);
124         return error;
125 }
126 #else
127 static inline int axff_init(struct hid_device *hid)
128 {
129         return 0;
130 }
131 #endif
132
133 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
134 {
135         int error;
136
137         dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n");
138
139         error = hid_parse(hdev);
140         if (error) {
141                 hid_err(hdev, "parse failed\n");
142                 return error;
143         }
144
145         error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
146         if (error) {
147                 hid_err(hdev, "hw start failed\n");
148                 return error;
149         }
150
151         error = axff_init(hdev);
152         if (error) {
153                 /*
154                  * Do not fail device initialization completely as device
155                  * may still be partially operable, just warn.
156                  */
157                 hid_warn(hdev,
158                          "Failed to enable force feedback support, error: %d\n",
159                          error);
160         }
161
162         /*
163          * We need to start polling device right away, otherwise
164          * it will go into a coma.
165          */
166         error = hid_hw_open(hdev);
167         if (error) {
168                 dev_err(&hdev->dev, "hw open failed\n");
169                 hid_hw_stop(hdev);
170                 return error;
171         }
172
173         return 0;
174 }
175
176 static void ax_remove(struct hid_device *hdev)
177 {
178         hid_hw_close(hdev);
179         hid_hw_stop(hdev);
180 }
181
182 static const struct hid_device_id ax_devices[] = {
183         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
184         { }
185 };
186 MODULE_DEVICE_TABLE(hid, ax_devices);
187
188 static struct hid_driver ax_driver = {
189         .name           = "acrux",
190         .id_table       = ax_devices,
191         .probe          = ax_probe,
192         .remove         = ax_remove,
193 };
194
195 static int __init ax_init(void)
196 {
197         return hid_register_driver(&ax_driver);
198 }
199
200 static void __exit ax_exit(void)
201 {
202         hid_unregister_driver(&ax_driver);
203 }
204
205 module_init(ax_init);
206 module_exit(ax_exit);
207
208 MODULE_AUTHOR("Sergei Kolzun");
209 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
210 MODULE_LICENSE("GPL");