HID: switch to using input_dev->dev.parent
[linux-2.6.git] / drivers / hid / usbhid / 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 #include "usbhid.h"
34
35 struct dev_type {
36         u16 idVendor;
37         u16 idProduct;
38         const signed short *ff;
39 };
40
41 static const signed short ff_rumble[] = {
42         FF_RUMBLE,
43         -1
44 };
45
46 static const signed short ff_joystick[] = {
47         FF_CONSTANT,
48         -1
49 };
50
51 static const struct dev_type devices[] = {
52         { 0x046d, 0xc211, ff_rumble },
53         { 0x046d, 0xc219, ff_rumble },
54         { 0x046d, 0xc283, ff_joystick },
55         { 0x046d, 0xc286, ff_joystick },
56         { 0x046d, 0xc294, ff_joystick },
57         { 0x046d, 0xc295, ff_joystick },
58         { 0x046d, 0xca03, ff_joystick },
59 };
60
61 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
62 {
63         struct hid_device *hid = input_get_drvdata(dev);
64         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
65         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
66         int x, y;
67         unsigned int left, right;
68
69 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
70
71         switch (effect->type) {
72         case FF_CONSTANT:
73                 x = effect->u.ramp.start_level + 0x7f;  /* 0x7f is center */
74                 y = effect->u.ramp.end_level + 0x7f;
75                 CLAMP(x);
76                 CLAMP(y);
77                 report->field[0]->value[0] = 0x51;
78                 report->field[0]->value[1] = 0x08;
79                 report->field[0]->value[2] = x;
80                 report->field[0]->value[3] = y;
81                 dbg("(x, y)=(%04x, %04x)", x, y);
82                 usbhid_submit_report(hid, report, USB_DIR_OUT);
83                 break;
84
85         case FF_RUMBLE:
86                 right = effect->u.rumble.strong_magnitude;
87                 left = effect->u.rumble.weak_magnitude;
88                 right = right * 0xff / 0xffff;
89                 left = left * 0xff / 0xffff;
90                 CLAMP(left);
91                 CLAMP(right);
92                 report->field[0]->value[0] = 0x42;
93                 report->field[0]->value[1] = 0x00;
94                 report->field[0]->value[2] = left;
95                 report->field[0]->value[3] = right;
96                 dbg("(left, right)=(%04x, %04x)", left, right);
97                 usbhid_submit_report(hid, report, USB_DIR_OUT);
98                 break;
99         }
100         return 0;
101 }
102
103 int hid_lgff_init(struct hid_device* hid)
104 {
105         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
106         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
107         struct input_dev *dev = hidinput->input;
108         struct hid_report *report;
109         struct hid_field *field;
110         const signed short *ff_bits = ff_joystick;
111         int error;
112         int i;
113
114         /* Find the report to use */
115         if (list_empty(report_list)) {
116                 err("No output report found");
117                 return -1;
118         }
119
120         /* Check that the report looks ok */
121         report = list_entry(report_list->next, struct hid_report, list);
122         if (!report) {
123                 err("NULL output report");
124                 return -1;
125         }
126
127         field = report->field[0];
128         if (!field) {
129                 err("NULL field");
130                 return -1;
131         }
132
133         for (i = 0; i < ARRAY_SIZE(devices); i++) {
134                 if (dev->id.vendor == devices[i].idVendor &&
135                     dev->id.product == devices[i].idProduct) {
136                         ff_bits = devices[i].ff;
137                         break;
138                 }
139         }
140
141         for (i = 0; ff_bits[i] >= 0; i++)
142                 set_bit(ff_bits[i], dev->ffbit);
143
144         error = input_ff_create_memless(dev, NULL, hid_lgff_play);
145         if (error)
146                 return error;
147
148         printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
149
150         return 0;
151 }