1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Copyright (c) 2000-2001 Vojtech Pavlik
* Copyright (c) 2000 Mark Fletcher
*/
/*
* Gravis Stinger gamepad driver for Linux
*/
/*
* This program is free warftware; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Gravis Stinger gamepad driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Constants.
*/
#define STINGER_MAX_LENGTH 8
/*
* Per-Stinger data.
*/
struct stinger {
struct input_dev *dev;
int idx;
unsigned char data[STINGER_MAX_LENGTH];
char phys[32];
};
/*
* stinger_process_packet() decodes packets the driver receives from the
* Stinger. It updates the data accordingly.
*/
static void stinger_process_packet(struct stinger *stinger)
{
struct input_dev *dev = stinger->dev;
unsigned char *data = stinger->data;
if (!stinger->idx) return;
input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5));
input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4));
input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3));
input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2));
input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5));
input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4));
input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3));
input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2));
input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1));
input_report_key(dev, BTN_START, (data[3] & 0x01));
input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
input_sync(dev);
return;
}
/*
* stinger_interrupt() is called by the low level driver when characters
* are ready for us. We then buffer them for further processing, or call the
* packet processing routine.
*/
static irqreturn_t stinger_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct stinger *stinger = serio_get_drvdata(serio);
/* All Stinger packets are 4 bytes */
if (stinger->idx < STINGER_MAX_LENGTH)
stinger->data[stinger->idx++] = data;
if (stinger->idx == 4) {
stinger_process_packet(stinger);
stinger->idx = 0;
}
return IRQ_HANDLED;
}
/*
* stinger_disconnect() is the opposite of stinger_connect()
*/
static void stinger_disconnect(struct serio *serio)
{
struct stinger *stinger = serio_get_drvdata(serio);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_unregister_device(stinger->dev);
kfree(stinger);
}
/*
* stinger_connect() is the routine that is called when someone adds a
* new serio device that supports Stinger protocol and registers it as
* an input device.
*/
static int stinger_connect(struct serio *serio, struct serio_driver *drv)
{
struct stinger *stinger;
struct input_dev *input_dev;
int err = -ENOMEM;
stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL);
input_dev = input_allocate_device();
if (!stinger || !input_dev)
goto fail1;
stinger->dev = input_dev;
snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys);
input_dev->name = "Gravis Stinger";
input_dev->phys = stinger->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_STINGER;
input_dev->id.product = 0x0001;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_A)] = BIT_MASK(BTN_A) | BIT_MASK(BTN_B) |
BIT_MASK(BTN_C) | BIT_MASK(BTN_X) | BIT_MASK(BTN_Y) |
BIT_MASK(BTN_Z) | BIT_MASK(BTN_TL) | BIT_MASK(BTN_TR) |
BIT_MASK(BTN_START) | BIT_MASK(BTN_SELECT);
input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4);
input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4);
serio_set_drvdata(serio, stinger);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(stinger->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(stinger);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id stinger_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_STINGER,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, stinger_serio_ids);
static struct serio_driver stinger_drv = {
.driver = {
.name = "stinger",
},
.description = DRIVER_DESC,
.id_table = stinger_serio_ids,
.interrupt = stinger_interrupt,
.connect = stinger_connect,
.disconnect = stinger_disconnect,
};
module_serio_driver(stinger_drv);
|
