HID: fix hid->hiddev initialization in hiddev_connect()
[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 signed short ff_wheel[] = {
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 },
64         { 0x046d, 0xc294, ff_joystick },
65         { 0x046d, 0xc295, ff_joystick },
66         { 0x046d, 0xca03, ff_wheel },
67 };
68
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                 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
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         usbhid_submit_report(hid, report, USB_DIR_OUT);
126 }
127
128 int 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 }