HID: move logitech FF processing
[linux-2.6.git] / drivers / hid / hid-lgff.c
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 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
63 static 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
105 int 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 }