hid-sjoy.c revision 4291ee305e9bb0699504a66f0e2b7aefcf0512a5 
1/*
2 *  Force feedback support for SmartJoy PLUS PS2->USB adapter
3 *
4 *  Copyright (c) 2009 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
5 *
6 *  Based of hid-pl.c and hid-gaff.c
7 *   Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
8 *   Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
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
27/* #define DEBUG */
28
29#include <linux/input.h>
30#include <linux/slab.h>
31#include <linux/usb.h>
32#include <linux/hid.h>
33#include "hid-ids.h"
34
35#ifdef CONFIG_SMARTJOYPLUS_FF
36#include "usbhid/usbhid.h"
37
38struct sjoyff_device {
39	struct hid_report *report;
40};
41
42static int hid_sjoyff_play(struct input_dev *dev, void *data,
43			 struct ff_effect *effect)
44{
45	struct hid_device *hid = input_get_drvdata(dev);
46	struct sjoyff_device *sjoyff = data;
47	u32 left, right;
48
49	left = effect->u.rumble.strong_magnitude;
50	right = effect->u.rumble.weak_magnitude;
51	dev_dbg(&dev->dev, "called with 0x%08x 0x%08x\n", left, right);
52
53	left = left * 0xff / 0xffff;
54	right = (right != 0); /* on/off only */
55
56	sjoyff->report->field[0]->value[1] = right;
57	sjoyff->report->field[0]->value[2] = left;
58	dev_dbg(&dev->dev, "running with 0x%02x 0x%02x\n", left, right);
59	usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
60
61	return 0;
62}
63
64static int sjoyff_init(struct hid_device *hid)
65{
66	struct sjoyff_device *sjoyff;
67	struct hid_report *report;
68	struct hid_input *hidinput = list_entry(hid->inputs.next,
69						struct hid_input, list);
70	struct list_head *report_list =
71			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
72	struct list_head *report_ptr = report_list;
73	struct input_dev *dev;
74	int error;
75
76	if (list_empty(report_list)) {
77		hid_err(hid, "no output reports found\n");
78		return -ENODEV;
79	}
80
81	report_ptr = report_ptr->next;
82
83	if (report_ptr == report_list) {
84		hid_err(hid, "required output report is missing\n");
85		return -ENODEV;
86	}
87
88	report = list_entry(report_ptr, struct hid_report, list);
89	if (report->maxfield < 1) {
90		hid_err(hid, "no fields in the report\n");
91		return -ENODEV;
92	}
93
94	if (report->field[0]->report_count < 3) {
95		hid_err(hid, "not enough values in the field\n");
96		return -ENODEV;
97	}
98
99	sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
100	if (!sjoyff)
101		return -ENOMEM;
102
103	dev = hidinput->input;
104
105	set_bit(FF_RUMBLE, dev->ffbit);
106
107	error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
108	if (error) {
109		kfree(sjoyff);
110		return error;
111	}
112
113	sjoyff->report = report;
114	sjoyff->report->field[0]->value[0] = 0x01;
115	sjoyff->report->field[0]->value[1] = 0x00;
116	sjoyff->report->field[0]->value[2] = 0x00;
117	usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
118
119	hid_info(hid, "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
120
121	return 0;
122}
123#else
124static inline int sjoyff_init(struct hid_device *hid)
125{
126	return 0;
127}
128#endif
129
130static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
131{
132	int ret;
133
134	ret = hid_parse(hdev);
135	if (ret) {
136		hid_err(hdev, "parse failed\n");
137		goto err;
138	}
139
140	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
141	if (ret) {
142		hid_err(hdev, "hw start failed\n");
143		goto err;
144	}
145
146	sjoyff_init(hdev);
147
148	return 0;
149err:
150	return ret;
151}
152
153static const struct hid_device_id sjoy_devices[] = {
154	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
155	{ }
156};
157MODULE_DEVICE_TABLE(hid, sjoy_devices);
158
159static struct hid_driver sjoy_driver = {
160	.name = "smartjoyplus",
161	.id_table = sjoy_devices,
162	.probe = sjoy_probe,
163};
164
165static int __init sjoy_init(void)
166{
167	return hid_register_driver(&sjoy_driver);
168}
169
170static void __exit sjoy_exit(void)
171{
172	hid_unregister_driver(&sjoy_driver);
173}
174
175module_init(sjoy_init);
176module_exit(sjoy_exit);
177MODULE_LICENSE("GPL");
178MODULE_AUTHOR("Jussi Kivilinna");
179
180