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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32 #include <linux/input.h>
33 #include <linux/hid.h>
34
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 struct dev_type devices[] = {
60 { 0x046d, 0xc211, ff_rumble },
61 { 0x046d, 0xc219, ff_rumble },
62 { 0x046d, 0xc283, ff_joystick },
63 { 0x046d, 0xc286, ff_joystick_ac },
64 { 0x046d, 0xc287, ff_joystick_ac },
65 { 0x046d, 0xc293, ff_joystick },
66 { 0x046d, 0xc295, ff_joystick },
67 };
68
hid_lgff_play(struct input_dev * dev,void * data,struct ff_effect * effect)69 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
70 {
71 struct hid_device *hid = input_get_drvdata(dev);
72 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
73 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
74 int x, y;
75 unsigned int left, right;
76
77 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
78
79 switch (effect->type) {
80 case FF_CONSTANT:
81 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */
82 y = effect->u.ramp.end_level + 0x7f;
83 CLAMP(x);
84 CLAMP(y);
85 report->field[0]->value[0] = 0x51;
86 report->field[0]->value[1] = 0x08;
87 report->field[0]->value[2] = x;
88 report->field[0]->value[3] = y;
89 dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
90 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
91 break;
92
93 case FF_RUMBLE:
94 right = effect->u.rumble.strong_magnitude;
95 left = effect->u.rumble.weak_magnitude;
96 right = right * 0xff / 0xffff;
97 left = left * 0xff / 0xffff;
98 CLAMP(left);
99 CLAMP(right);
100 report->field[0]->value[0] = 0x42;
101 report->field[0]->value[1] = 0x00;
102 report->field[0]->value[2] = left;
103 report->field[0]->value[3] = right;
104 dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
105 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
106 break;
107 }
108 return 0;
109 }
110
hid_lgff_set_autocenter(struct input_dev * dev,u16 magnitude)111 static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude)
112 {
113 struct hid_device *hid = input_get_drvdata(dev);
114 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
115 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
116 __s32 *value = report->field[0]->value;
117 magnitude = (magnitude >> 12) & 0xf;
118 *value++ = 0xfe;
119 *value++ = 0x0d;
120 *value++ = magnitude; /* clockwise strength */
121 *value++ = magnitude; /* counter-clockwise strength */
122 *value++ = 0x80;
123 *value++ = 0x00;
124 *value = 0x00;
125 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
126 }
127
lgff_init(struct hid_device * hid)128 int lgff_init(struct hid_device* hid)
129 {
130 struct hid_input *hidinput;
131 struct input_dev *dev;
132 const signed short *ff_bits = ff_joystick;
133 int error;
134 int i;
135
136 if (list_empty(&hid->inputs)) {
137 hid_err(hid, "no inputs found\n");
138 return -ENODEV;
139 }
140 hidinput = list_entry(hid->inputs.next, struct hid_input, list);
141 dev = hidinput->input;
142
143 /* Check that the report looks ok */
144 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
145 return -ENODEV;
146
147 for (i = 0; i < ARRAY_SIZE(devices); i++) {
148 if (dev->id.vendor == devices[i].idVendor &&
149 dev->id.product == devices[i].idProduct) {
150 ff_bits = devices[i].ff;
151 break;
152 }
153 }
154
155 for (i = 0; ff_bits[i] >= 0; i++)
156 set_bit(ff_bits[i], dev->ffbit);
157
158 error = input_ff_create_memless(dev, NULL, hid_lgff_play);
159 if (error)
160 return error;
161
162 if ( test_bit(FF_AUTOCENTER, dev->ffbit) )
163 dev->ff->set_autocenter = hid_lgff_set_autocenter;
164
165 pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
166
167 return 0;
168 }
169