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
33struct zpff_device {
34 struct hid_report *report;
35};
36
37static 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
65static int zpff_init(struct hid_device *hid)
66{
67 struct zpff_device *zpff;
68 struct hid_report *report;
69 struct hid_input *hidinput = list_entry(hid->inputs.next,
70 struct hid_input, list);
71 struct input_dev *dev = hidinput->input;
72 int i, error;
73
74 for (i = 0; i < 4; i++) {
75 report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
76 if (!report)
77 return -ENODEV;
78 }
79
80 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
81 if (!zpff)
82 return -ENOMEM;
83
84 set_bit(FF_RUMBLE, dev->ffbit);
85
86 error = input_ff_create_memless(dev, zpff, zpff_play);
87 if (error) {
88 kfree(zpff);
89 return error;
90 }
91
92 zpff->report = report;
93 zpff->report->field[0]->value[0] = 0x00;
94 zpff->report->field[1]->value[0] = 0x02;
95 zpff->report->field[2]->value[0] = 0x00;
96 zpff->report->field[3]->value[0] = 0x00;
97 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
98
99 hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
100
101 return 0;
102}
103#else
104static inline int zpff_init(struct hid_device *hid)
105{
106 return 0;
107}
108#endif
109
110static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
111{
112 int ret;
113
114 ret = hid_parse(hdev);
115 if (ret) {
116 hid_err(hdev, "parse failed\n");
117 goto err;
118 }
119
120 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
121 if (ret) {
122 hid_err(hdev, "hw start failed\n");
123 goto err;
124 }
125
126 zpff_init(hdev);
127
128 return 0;
129err:
130 return ret;
131}
132
133static const struct hid_device_id zp_devices[] = {
134 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
135 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
136 { }
137};
138MODULE_DEVICE_TABLE(hid, zp_devices);
139
140static struct hid_driver zp_driver = {
141 .name = "zeroplus",
142 .id_table = zp_devices,
143 .probe = zp_probe,
144};
145module_hid_driver(zp_driver);
146
147MODULE_LICENSE("GPL");
148