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authorJiri Slaby <jirislaby@gmail.com>2008-07-04 17:06:45 -0400
committerJiri Kosina <jkosina@suse.cz>2008-10-14 17:50:56 -0400
commit606bd0a8616a0e59021cb2997e942513f24f641d (patch)
treef4884ef8d1beb2c13eaa3af45512c7b43def30ae /drivers/hid/hid-lgff.c
parent6edfa8dc33803a49ad936ead9840e453bee6ca3b (diff)
HID: move logitech FF processing
Merge the logitech force feedback processing directly into logitech driver from the usbhid core. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-lgff.c')
-rw-r--r--drivers/hid/hid-lgff.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c
new file mode 100644
index 000000000000..e379c167ac9e
--- /dev/null
+++ b/drivers/hid/hid-lgff.c
@@ -0,0 +1,153 @@
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 struct dev_type devices[] = {
54 { 0x046d, 0xc211, ff_rumble },
55 { 0x046d, 0xc219, ff_rumble },
56 { 0x046d, 0xc283, ff_joystick },
57 { 0x046d, 0xc286, ff_joystick },
58 { 0x046d, 0xc294, ff_joystick },
59 { 0x046d, 0xc295, ff_joystick },
60 { 0x046d, 0xca03, ff_joystick },
61};
62
63static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
64{
65 struct hid_device *hid = input_get_drvdata(dev);
66 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
67 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
68 int x, y;
69 unsigned int left, right;
70
71#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
72
73 switch (effect->type) {
74 case FF_CONSTANT:
75 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */
76 y = effect->u.ramp.end_level + 0x7f;
77 CLAMP(x);
78 CLAMP(y);
79 report->field[0]->value[0] = 0x51;
80 report->field[0]->value[1] = 0x08;
81 report->field[0]->value[2] = x;
82 report->field[0]->value[3] = y;
83 dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
84 usbhid_submit_report(hid, report, USB_DIR_OUT);
85 break;
86
87 case FF_RUMBLE:
88 right = effect->u.rumble.strong_magnitude;
89 left = effect->u.rumble.weak_magnitude;
90 right = right * 0xff / 0xffff;
91 left = left * 0xff / 0xffff;
92 CLAMP(left);
93 CLAMP(right);
94 report->field[0]->value[0] = 0x42;
95 report->field[0]->value[1] = 0x00;
96 report->field[0]->value[2] = left;
97 report->field[0]->value[3] = right;
98 dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
99 usbhid_submit_report(hid, report, USB_DIR_OUT);
100 break;
101 }
102 return 0;
103}
104
105int lgff_init(struct hid_device* hid)
106{
107 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
108 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
109 struct input_dev *dev = hidinput->input;
110 struct hid_report *report;
111 struct hid_field *field;
112 const signed short *ff_bits = ff_joystick;
113 int error;
114 int i;
115
116 /* Find the report to use */
117 if (list_empty(report_list)) {
118 err_hid("No output report found");
119 return -1;
120 }
121
122 /* Check that the report looks ok */
123 report = list_entry(report_list->next, struct hid_report, list);
124 if (!report) {
125 err_hid("NULL output report");
126 return -1;
127 }
128
129 field = report->field[0];
130 if (!field) {
131 err_hid("NULL field");
132 return -1;
133 }
134
135 for (i = 0; i < ARRAY_SIZE(devices); i++) {
136 if (dev->id.vendor == devices[i].idVendor &&
137 dev->id.product == devices[i].idProduct) {
138 ff_bits = devices[i].ff;
139 break;
140 }
141 }
142
143 for (i = 0; ff_bits[i] >= 0; i++)
144 set_bit(ff_bits[i], dev->ffbit);
145
146 error = input_ff_create_memless(dev, NULL, hid_lgff_play);
147 if (error)
148 return error;
149
150 printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
151
152 return 0;
153}