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/hid.h>
33#include <linux/module.h>
34
35#include "hid-ids.h"
36
37#ifdef CONFIG_HID_ACRUX_FF
38
39struct axff_device {
40 struct hid_report *report;
41};
42
43static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
44{
45 struct hid_device *hid = input_get_drvdata(dev);
46 struct axff_device *axff = data;
47 struct hid_report *report = axff->report;
48 int field_count = 0;
49 int left, right;
50 int i, j;
51
52 left = effect->u.rumble.strong_magnitude;
53 right = effect->u.rumble.weak_magnitude;
54
55 dbg_hid("called with 0x%04x 0x%04x", left, right);
56
57 left = left * 0xff / 0xffff;
58 right = right * 0xff / 0xffff;
59
60 for (i = 0; i < report->maxfield; i++) {
61 for (j = 0; j < report->field[i]->report_count; j++) {
62 report->field[i]->value[j] =
63 field_count % 2 ? right : left;
64 field_count++;
65 }
66 }
67
68 dbg_hid("running with 0x%02x 0x%02x", left, right);
69 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT);
70
71 return 0;
72}
73
74static int axff_init(struct hid_device *hid)
75{
76 struct axff_device *axff;
77 struct hid_report *report;
78 struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
79 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
80 struct input_dev *dev = hidinput->input;
81 int field_count = 0;
82 int i, j;
83 int error;
84
85 if (list_empty(report_list)) {
86 hid_err(hid, "no output reports found\n");
87 return -ENODEV;
88 }
89
90 report = list_first_entry(report_list, struct hid_report, list);
91 for (i = 0; i < report->maxfield; i++) {
92 for (j = 0; j < report->field[i]->report_count; j++) {
93 report->field[i]->value[j] = 0x00;
94 field_count++;
95 }
96 }
97
98 if (field_count < 4 && hid->product != 0xf705) {
99 hid_err(hid, "not enough fields in the report: %d\n",
100 field_count);
101 return -ENODEV;
102 }
103
104 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
105 if (!axff)
106 return -ENOMEM;
107
108 set_bit(FF_RUMBLE, dev->ffbit);
109
110 error = input_ff_create_memless(dev, axff, axff_play);
111 if (error)
112 goto err_free_mem;
113
114 axff->report = report;
115 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT);
116
117 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n");
118
119 return 0;
120
121err_free_mem:
122 kfree(axff);
123 return error;
124}
125#else
126static inline int axff_init(struct hid_device *hid)
127{
128 return 0;
129}
130#endif
131
132static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
133{
134 int error;
135
136 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n");
137
138 error = hid_parse(hdev);
139 if (error) {
140 hid_err(hdev, "parse failed\n");
141 return error;
142 }
143
144 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
145 if (error) {
146 hid_err(hdev, "hw start failed\n");
147 return error;
148 }
149
150 error = axff_init(hdev);
151 if (error) {
152 /*
153 * Do not fail device initialization completely as device
154 * may still be partially operable, just warn.
155 */
156 hid_warn(hdev,
157 "Failed to enable force feedback support, error: %d\n",
158 error);
159 }
160
161 /*
162 * We need to start polling device right away, otherwise
163 * it will go into a coma.
164 */
165 error = hid_hw_open(hdev);
166 if (error) {
167 dev_err(&hdev->dev, "hw open failed\n");
168 hid_hw_stop(hdev);
169 return error;
170 }
171
172 return 0;
173}
174
175static void ax_remove(struct hid_device *hdev)
176{
177 hid_hw_close(hdev);
178 hid_hw_stop(hdev);
179}
180
181static const struct hid_device_id ax_devices[] = {
182 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
183 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705), },
184 { }
185};
186MODULE_DEVICE_TABLE(hid, ax_devices);
187
188static struct hid_driver ax_driver = {
189 .name = "acrux",
190 .id_table = ax_devices,
191 .probe = ax_probe,
192 .remove = ax_remove,
193};
194module_hid_driver(ax_driver);
195
196MODULE_AUTHOR("Sergei Kolzun");
197MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
198MODULE_LICENSE("GPL");
199