hwmon: (it87) Add chassis intrusion detection support
[linux-2.6.git] / drivers / hid / hid-zpff.c
1 /*
2  *  Force feedback support for Zeroplus based devices
3  *
4  *  Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
5  */
6
7 /*
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  */
22
23
24 #include <linux/hid.h>
25 #include <linux/input.h>
26 #include <linux/slab.h>
27 #include <linux/usb.h>
28
29 #include "hid-ids.h"
30
31 #ifdef CONFIG_ZEROPLUS_FF
32 #include "usbhid/usbhid.h"
33
34 struct zpff_device {
35         struct hid_report *report;
36 };
37
38 static int zpff_play(struct input_dev *dev, void *data,
39                          struct ff_effect *effect)
40 {
41         struct hid_device *hid = input_get_drvdata(dev);
42         struct zpff_device *zpff = data;
43         int left, right;
44
45         /*
46          * The following is specified the other way around in the Zeroplus
47          * datasheet but the order below is correct for the XFX Executioner;
48          * however it is possible that the XFX Executioner is an exception
49          */
50
51         left = effect->u.rumble.strong_magnitude;
52         right = effect->u.rumble.weak_magnitude;
53         dbg_hid("called with 0x%04x 0x%04x\n", left, right);
54
55         left = left * 0x7f / 0xffff;
56         right = right * 0x7f / 0xffff;
57
58         zpff->report->field[2]->value[0] = left;
59         zpff->report->field[3]->value[0] = right;
60         dbg_hid("running with 0x%02x 0x%02x\n", left, right);
61         usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
62
63         return 0;
64 }
65
66 static int zpff_init(struct hid_device *hid)
67 {
68         struct zpff_device *zpff;
69         struct hid_report *report;
70         struct hid_input *hidinput = list_entry(hid->inputs.next,
71                                                 struct hid_input, list);
72         struct list_head *report_list =
73                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
74         struct input_dev *dev = hidinput->input;
75         int error;
76
77         if (list_empty(report_list)) {
78                 hid_err(hid, "no output report found\n");
79                 return -ENODEV;
80         }
81
82         report = list_entry(report_list->next, struct hid_report, list);
83
84         if (report->maxfield < 4) {
85                 hid_err(hid, "not enough fields in report\n");
86                 return -ENODEV;
87         }
88
89         zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
90         if (!zpff)
91                 return -ENOMEM;
92
93         set_bit(FF_RUMBLE, dev->ffbit);
94
95         error = input_ff_create_memless(dev, zpff, zpff_play);
96         if (error) {
97                 kfree(zpff);
98                 return error;
99         }
100
101         zpff->report = report;
102         zpff->report->field[0]->value[0] = 0x00;
103         zpff->report->field[1]->value[0] = 0x02;
104         zpff->report->field[2]->value[0] = 0x00;
105         zpff->report->field[3]->value[0] = 0x00;
106         usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
107
108         hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
109
110         return 0;
111 }
112 #else
113 static inline int zpff_init(struct hid_device *hid)
114 {
115         return 0;
116 }
117 #endif
118
119 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
120 {
121         int ret;
122
123         ret = hid_parse(hdev);
124         if (ret) {
125                 hid_err(hdev, "parse failed\n");
126                 goto err;
127         }
128
129         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
130         if (ret) {
131                 hid_err(hdev, "hw start failed\n");
132                 goto err;
133         }
134
135         zpff_init(hdev);
136
137         return 0;
138 err:
139         return ret;
140 }
141
142 static const struct hid_device_id zp_devices[] = {
143         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
144         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
145         { }
146 };
147 MODULE_DEVICE_TABLE(hid, zp_devices);
148
149 static struct hid_driver zp_driver = {
150         .name = "zeroplus",
151         .id_table = zp_devices,
152         .probe = zp_probe,
153 };
154
155 static int __init zp_init(void)
156 {
157         return hid_register_driver(&zp_driver);
158 }
159
160 static void __exit zp_exit(void)
161 {
162         hid_unregister_driver(&zp_driver);
163 }
164
165 module_init(zp_init);
166 module_exit(zp_exit);
167 MODULE_LICENSE("GPL");