1 /*
2 * Force feedback support for hid-compliant for some of the devices from
3 * Logitech, namely:
4 * - WingMan Cordless RumblePad
5 * - WingMan Force 3D
6 *
7 * Copyright (c) 2002-2004 Johann Deneux
8 * Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com>
9 */
10
11 /*
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 * Should you need to contact me, the author, you can do so by
27 * e-mail - mail your message to <johann.deneux@it.uu.se>
28 */
29
30 #include <linux/input.h>
31 #include <linux/usb.h>
32 #include <linux/hid.h>
33 #include "usbhid.h"
34
35 struct dev_type {
36 u16 idVendor;
37 u16 idProduct;
38 const signed short *ff;
39 };
40
41 static const signed short ff_rumble[] = {
42 FF_RUMBLE,
43 -1
44 };
45
46 static const signed short ff_joystick[] = {
47 FF_CONSTANT,
48 -1
49 };
50
51 static const struct dev_type devices[] = {
52 { 0x046d, 0xc211, ff_rumble },
53 { 0x046d, 0xc219, ff_rumble },
54 { 0x046d, 0xc283, ff_joystick },
55 { 0x046d, 0xc286, ff_joystick },
56 { 0x046d, 0xc294, ff_joystick },
57 { 0x046d, 0xc295, ff_joystick },
58 { 0x046d, 0xca03, ff_joystick },
59 };
60
61 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
62 {
63 struct hid_device *hid = input_get_drvdata(dev);
64 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
65 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
66 int x, y;
67 unsigned int left, right;
68
69 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
70
71 switch (effect->type) {
72 case FF_CONSTANT:
73 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */
74 y = effect->u.ramp.end_level + 0x7f;
75 CLAMP(x);
76 CLAMP(y);
77 report->field[0]->value[0] = 0x51;
78 report->field[0]->value[1] = 0x08;
79 report->field[0]->value[2] = x;
80 report->field[0]->value[3] = y;
81 dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
82 usbhid_submit_report(hid, report, USB_DIR_OUT);
83 break;
84
85 case FF_RUMBLE:
86 right = effect->u.rumble.strong_magnitude;
87 left = effect->u.rumble.weak_magnitude;
88 right = right * 0xff / 0xffff;
89 left = left * 0xff / 0xffff;
90 CLAMP(left);
91 CLAMP(right);
92 report->field[0]->value[0] = 0x42;
93 report->field[0]->value[1] = 0x00;
94 report->field[0]->value[2] = left;
95 report->field[0]->value[3] = right;
96 dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
97 usbhid_submit_report(hid, report, USB_DIR_OUT);
98 break;
99 }
100 return 0;
101 }
102
103 int hid_lgff_init(struct hid_device* hid)
104 {
105 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
106 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
107 struct input_dev *dev = hidinput->input;
108 struct hid_report *report;
109 struct hid_field *field;
110 const signed short *ff_bits = ff_joystick;
111 int error;
112 int i;
113
114 /* Find the report to use */
115 if (list_empty(report_list)) {
116 err_hid("No output report found");
117 return -1;
118 }
119
120 /* Check that the report looks ok */
121 report = list_entry(report_list->next, struct hid_report, list);
122 if (!report) {
123 err_hid("NULL output report");
124 return -1;
125 }
126
127 field = report->field[0];
128 if (!field) {
129 err_hid("NULL field");
130 return -1;
131 }
132
133 for (i = 0; i < ARRAY_SIZE(devices); i++) {
134 if (dev->id.vendor == devices[i].idVendor &&
135 dev->id.product == devices[i].idProduct) {
136 ff_bits = devices[i].ff;
137 break;
138 }
139 }
140
141 for (i = 0; ff_bits[i] >= 0; i++)
142 set_bit(ff_bits[i], dev->ffbit);
143
144 error = input_ff_create_memless(dev, NULL, hid_lgff_play);
145 if (error)
146 return error;
147
148 printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
149
150 return 0;
151 }
152
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