1 /*
2 * Force feedback support for Zeroplus based devices
3 *
4 * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
5 */
6
7 /*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23
24 #include <linux/hid.h>
25 #include <linux/input.h>
26 #include <linux/slab.h>
27 #include <linux/module.h>
28
29 #include "hid-ids.h"
30
31 #ifdef CONFIG_ZEROPLUS_FF
32
33 struct zpff_device {
34 struct hid_report *report;
35 };
36
zpff_play(struct input_dev * dev,void * data,struct ff_effect * effect)37 static int zpff_play(struct input_dev *dev, void *data,
38 struct ff_effect *effect)
39 {
40 struct hid_device *hid = input_get_drvdata(dev);
41 struct zpff_device *zpff = data;
42 int left, right;
43
44 /*
45 * The following is specified the other way around in the Zeroplus
46 * datasheet but the order below is correct for the XFX Executioner;
47 * however it is possible that the XFX Executioner is an exception
48 */
49
50 left = effect->u.rumble.strong_magnitude;
51 right = effect->u.rumble.weak_magnitude;
52 dbg_hid("called with 0x%04x 0x%04x\n", left, right);
53
54 left = left * 0x7f / 0xffff;
55 right = right * 0x7f / 0xffff;
56
57 zpff->report->field[2]->value[0] = left;
58 zpff->report->field[3]->value[0] = right;
59 dbg_hid("running with 0x%02x 0x%02x\n", left, right);
60 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
61
62 return 0;
63 }
64
zpff_init(struct hid_device * hid)65 static int zpff_init(struct hid_device *hid)
66 {
67 struct zpff_device *zpff;
68 struct hid_report *report;
69 struct hid_input *hidinput;
70 struct input_dev *dev;
71 int i, error;
72
73 if (list_empty(&hid->inputs)) {
74 hid_err(hid, "no inputs found\n");
75 return -ENODEV;
76 }
77 hidinput = list_entry(hid->inputs.next, struct hid_input, list);
78 dev = hidinput->input;
79
80 for (i = 0; i < 4; i++) {
81 report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
82 if (!report)
83 return -ENODEV;
84 }
85
86 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
87 if (!zpff)
88 return -ENOMEM;
89
90 set_bit(FF_RUMBLE, dev->ffbit);
91
92 error = input_ff_create_memless(dev, zpff, zpff_play);
93 if (error) {
94 kfree(zpff);
95 return error;
96 }
97
98 zpff->report = report;
99 zpff->report->field[0]->value[0] = 0x00;
100 zpff->report->field[1]->value[0] = 0x02;
101 zpff->report->field[2]->value[0] = 0x00;
102 zpff->report->field[3]->value[0] = 0x00;
103 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
104
105 hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
106
107 return 0;
108 }
109 #else
zpff_init(struct hid_device * hid)110 static inline int zpff_init(struct hid_device *hid)
111 {
112 return 0;
113 }
114 #endif
115
zp_probe(struct hid_device * hdev,const struct hid_device_id * id)116 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
117 {
118 int ret;
119
120 ret = hid_parse(hdev);
121 if (ret) {
122 hid_err(hdev, "parse failed\n");
123 goto err;
124 }
125
126 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
127 if (ret) {
128 hid_err(hdev, "hw start failed\n");
129 goto err;
130 }
131
132 zpff_init(hdev);
133
134 return 0;
135 err:
136 return ret;
137 }
138
139 static const struct hid_device_id zp_devices[] = {
140 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
141 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
142 { }
143 };
144 MODULE_DEVICE_TABLE(hid, zp_devices);
145
146 static struct hid_driver zp_driver = {
147 .name = "zeroplus",
148 .id_table = zp_devices,
149 .probe = zp_probe,
150 };
151 module_hid_driver(zp_driver);
152
153 MODULE_LICENSE("GPL");
154