Merge remote-tracking branch 'asoc/topic/rcar' into asoc-next
[linux-2.6-microblaze.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/module.h>
28
29 #include "hid-ids.h"
30
31 #ifdef CONFIG_ZEROPLUS_FF
32
33 struct zpff_device {
34         struct hid_report *report;
35 };
36
37 static int zpff_play(struct input_dev *dev, void *data,
38                          struct ff_effect *effect)
39 {
40         struct hid_device *hid = input_get_drvdata(dev);
41         struct zpff_device *zpff = data;
42         int left, right;
43
44         /*
45          * The following is specified the other way around in the Zeroplus
46          * datasheet but the order below is correct for the XFX Executioner;
47          * however it is possible that the XFX Executioner is an exception
48          */
49
50         left = effect->u.rumble.strong_magnitude;
51         right = effect->u.rumble.weak_magnitude;
52         dbg_hid("called with 0x%04x 0x%04x\n", left, right);
53
54         left = left * 0x7f / 0xffff;
55         right = right * 0x7f / 0xffff;
56
57         zpff->report->field[2]->value[0] = left;
58         zpff->report->field[3]->value[0] = right;
59         dbg_hid("running with 0x%02x 0x%02x\n", left, right);
60         hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
61
62         return 0;
63 }
64
65 static int zpff_init(struct hid_device *hid)
66 {
67         struct zpff_device *zpff;
68         struct hid_report *report;
69         struct hid_input *hidinput = list_entry(hid->inputs.next,
70                                                 struct hid_input, list);
71         struct input_dev *dev = hidinput->input;
72         int i, error;
73
74         for (i = 0; i < 4; i++) {
75                 report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
76                 if (!report)
77                         return -ENODEV;
78         }
79
80         zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
81         if (!zpff)
82                 return -ENOMEM;
83
84         set_bit(FF_RUMBLE, dev->ffbit);
85
86         error = input_ff_create_memless(dev, zpff, zpff_play);
87         if (error) {
88                 kfree(zpff);
89                 return error;
90         }
91
92         zpff->report = report;
93         zpff->report->field[0]->value[0] = 0x00;
94         zpff->report->field[1]->value[0] = 0x02;
95         zpff->report->field[2]->value[0] = 0x00;
96         zpff->report->field[3]->value[0] = 0x00;
97         hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
98
99         hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
100
101         return 0;
102 }
103 #else
104 static inline int zpff_init(struct hid_device *hid)
105 {
106         return 0;
107 }
108 #endif
109
110 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
111 {
112         int ret;
113
114         ret = hid_parse(hdev);
115         if (ret) {
116                 hid_err(hdev, "parse failed\n");
117                 goto err;
118         }
119
120         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
121         if (ret) {
122                 hid_err(hdev, "hw start failed\n");
123                 goto err;
124         }
125
126         zpff_init(hdev);
127
128         return 0;
129 err:
130         return ret;
131 }
132
133 static const struct hid_device_id zp_devices[] = {
134         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
135         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
136         { }
137 };
138 MODULE_DEVICE_TABLE(hid, zp_devices);
139
140 static struct hid_driver zp_driver = {
141         .name = "zeroplus",
142         .id_table = zp_devices,
143         .probe = zp_probe,
144 };
145 module_hid_driver(zp_driver);
146
147 MODULE_LICENSE("GPL");