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-rw-r--r--drivers/hid/hid-lgff.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c
new file mode 100644
index 000000000000..51aff08e10ce
--- /dev/null
+++ b/drivers/hid/hid-lgff.c
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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
37struct dev_type {
38 u16 idVendor;
39 u16 idProduct;
40 const signed short *ff;
41};
42
43static const signed short ff_rumble[] = {
44 FF_RUMBLE,
45 -1
46};
47
48static const signed short ff_joystick[] = {
49 FF_CONSTANT,
50 -1
51};
52
53static const signed short ff_wheel[] = {
54 FF_CONSTANT,
55 FF_AUTOCENTER,
56 -1
57};
58
59static 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 },
64 { 0x046d, 0xc294, ff_joystick },
65 { 0x046d, 0xc295, ff_joystick },
66 { 0x046d, 0xca03, ff_wheel },
67};
68
69static 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 usbhid_submit_report(hid, report, USB_DIR_OUT);
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 usbhid_submit_report(hid, report, USB_DIR_OUT);
106 break;
107 }
108 return 0;
109}
110
111static 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 usbhid_submit_report(hid, report, USB_DIR_OUT);
126}
127
128int lgff_init(struct hid_device* hid)
129{
130 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
131 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
132 struct input_dev *dev = hidinput->input;
133 struct hid_report *report;
134 struct hid_field *field;
135 const signed short *ff_bits = ff_joystick;
136 int error;
137 int i;
138
139 /* Find the report to use */
140 if (list_empty(report_list)) {
141 err_hid("No output report found");
142 return -1;
143 }
144
145 /* Check that the report looks ok */
146 report = list_entry(report_list->next, struct hid_report, list);
147 if (!report) {
148 err_hid("NULL output report");
149 return -1;
150 }
151
152 field = report->field[0];
153 if (!field) {
154 err_hid("NULL field");
155 return -1;
156 }
157
158 for (i = 0; i < ARRAY_SIZE(devices); i++) {
159 if (dev->id.vendor == devices[i].idVendor &&
160 dev->id.product == devices[i].idProduct) {
161 ff_bits = devices[i].ff;
162 break;
163 }
164 }
165
166 for (i = 0; ff_bits[i] >= 0; i++)
167 set_bit(ff_bits[i], dev->ffbit);
168
169 error = input_ff_create_memless(dev, NULL, hid_lgff_play);
170 if (error)
171 return error;
172
173 if ( test_bit(FF_AUTOCENTER, dev->ffbit) )
174 dev->ff->set_autocenter = hid_lgff_set_autocenter;
175
176 printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
177
178 return 0;
179}
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