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
34 #include "usbhid/usbhid.h"
35 #include "hid-lg.h"
36
37 struct dev_type {
38 u16 idVendor;
39 u16 idProduct;
40 const signed short *ff;
41 };
42
43 static const signed short ff_rumble[] = {
44 FF_RUMBLE,
45 -1
46 };
47
48 static const signed short ff_joystick[] = {
49 FF_CONSTANT,
50 -1
51 };
52
53 static const signed short ff_joystick_ac[] = {
54 FF_CONSTANT,
55 FF_AUTOCENTER,
56 -1
57 };
58
59 static const signed short ff_wheel[] = {
60 FF_CONSTANT,
61 FF_AUTOCENTER,
62 -1
63 };
64
65 static const struct dev_type devices[] = {
66 { 0x046d, 0xc211, ff_rumble },
67 { 0x046d, 0xc219, ff_rumble },
68 { 0x046d, 0xc283, ff_joystick },
69 { 0x046d, 0xc286, ff_joystick_ac },
70 { 0x046d, 0xc294, ff_wheel },
71 { 0x046d, 0xc295, ff_joystick },
72 { 0x046d, 0xca03, ff_wheel },
73 };
74
75 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
76 {
77 struct hid_device *hid = input_get_drvdata(dev);
78 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
79 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
80 int x, y;
81 unsigned int left, right;
82
83 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
84
85 switch (effect->type) {
86 case FF_CONSTANT:
87 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */
88 y = effect->u.ramp.end_level + 0x7f;
89 CLAMP(x);
90 CLAMP(y);
91 report->field[0]->value[0] = 0x51;
92 report->field[0]->value[1] = 0x08;
93 report->field[0]->value[2] = x;
94 report->field[0]->value[3] = y;
95 dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
96 usbhid_submit_report(hid, report, USB_DIR_OUT);
97 break;
98
99 case FF_RUMBLE:
100 right = effect->u.rumble.strong_magnitude;
101 left = effect->u.rumble.weak_magnitude;
102 right = right * 0xff / 0xffff;
103 left = left * 0xff / 0xffff;
104 CLAMP(left);
105 CLAMP(right);
106 report->field[0]->value[0] = 0x42;
107 report->field[0]->value[1] = 0x00;
108 report->field[0]->value[2] = left;
109 report->field[0]->value[3] = right;
110 dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
111 usbhid_submit_report(hid, report, USB_DIR_OUT);
112 break;
113 }
114 return 0;
115 }
116
117 static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude)
118 {
119 struct hid_device *hid = input_get_drvdata(dev);
120 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
121 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
122 __s32 *value = report->field[0]->value;
123 magnitude = (magnitude >> 12) & 0xf;
124 *value++ = 0xfe;
125 *value++ = 0x0d;
126 *value++ = magnitude; /* clockwise strength */
127 *value++ = magnitude; /* counter-clockwise strength */
128 *value++ = 0x80;
129 *value++ = 0x00;
130 *value = 0x00;
131 usbhid_submit_report(hid, report, USB_DIR_OUT);
132 }
133
134 int lgff_init(struct hid_device* hid)
135 {
136 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
137 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
138 struct input_dev *dev = hidinput->input;
139 struct hid_report *report;
140 struct hid_field *field;
141 const signed short *ff_bits = ff_joystick;
142 int error;
143 int i;
144
145 /* Find the report to use */
146 if (list_empty(report_list)) {
147 err_hid("No output report found");
148 return -1;
149 }
150
151 /* Check that the report looks ok */
152 report = list_entry(report_list->next, struct hid_report, list);
153 if (!report) {
154 err_hid("NULL output report");
155 return -1;
156 }
157
158 field = report->field[0];
159 if (!field) {
160 err_hid("NULL field");
161 return -1;
162 }
163
164 for (i = 0; i < ARRAY_SIZE(devices); i++) {
165 if (dev->id.vendor == devices[i].idVendor &&
166 dev->id.product == devices[i].idProduct) {
167 ff_bits = devices[i].ff;
168 break;
169 }
170 }
171
172 for (i = 0; ff_bits[i] >= 0; i++)
173 set_bit(ff_bits[i], dev->ffbit);
174
175 error = input_ff_create_memless(dev, NULL, hid_lgff_play);
176 if (error)
177 return error;
178
179 if ( test_bit(FF_AUTOCENTER, dev->ffbit) )
180 dev->ff->set_autocenter = hid_lgff_set_autocenter;
181
182 printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
183
184 return 0;
185 }
186
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