tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * $Id: stinger.c,v 1.10 2002/01/22 20:29:31 vojtech Exp $
3 *
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 * Copyright (c) 2000 Mark Fletcher
6 */
7
8/*
9 * Gravis Stinger gamepad driver for Linux
10 */
11
12/*
13 * This program is free warftware; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30 */
31
32#include <linux/kernel.h>
33#include <linux/module.h>
34#include <linux/slab.h>
35#include <linux/input.h>
36#include <linux/serio.h>
37#include <linux/init.h>
38
39#define DRIVER_DESC "Gravis Stinger gamepad driver"
40
41MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42MODULE_DESCRIPTION(DRIVER_DESC);
43MODULE_LICENSE("GPL");
44
45/*
46 * Constants.
47 */
48
49#define STINGER_MAX_LENGTH 8
50
51/*
52 * Per-Stinger data.
53 */
54
55struct stinger {
56 struct input_dev *dev;
57 int idx;
58 unsigned char data[STINGER_MAX_LENGTH];
59 char phys[32];
60};
61
62/*
63 * stinger_process_packet() decodes packets the driver receives from the
64 * Stinger. It updates the data accordingly.
65 */
66
67static void stinger_process_packet(struct stinger *stinger)
68{
69 struct input_dev *dev = stinger->dev;
70 unsigned char *data = stinger->data;
71
72 if (!stinger->idx) return;
73
74 input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5));
75 input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4));
76 input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3));
77 input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2));
78 input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5));
79 input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4));
80 input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3));
81 input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2));
82 input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1));
83 input_report_key(dev, BTN_START, (data[3] & 0x01));
84
85 input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
86 input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
87
88 input_sync(dev);
89
90 return;
91}
92
93/*
94 * stinger_interrupt() is called by the low level driver when characters
95 * are ready for us. We then buffer them for further processing, or call the
96 * packet processing routine.
97 */
98
99static irqreturn_t stinger_interrupt(struct serio *serio,
100 unsigned char data, unsigned int flags)
101{
102 struct stinger *stinger = serio_get_drvdata(serio);
103
104 /* All Stinger packets are 4 bytes */
105
106 if (stinger->idx < STINGER_MAX_LENGTH)
107 stinger->data[stinger->idx++] = data;
108
109 if (stinger->idx == 4) {
110 stinger_process_packet(stinger);
111 stinger->idx = 0;
112 }
113
114 return IRQ_HANDLED;
115}
116
117/*
118 * stinger_disconnect() is the opposite of stinger_connect()
119 */
120
121static void stinger_disconnect(struct serio *serio)
122{
123 struct stinger *stinger = serio_get_drvdata(serio);
124
125 serio_close(serio);
126 serio_set_drvdata(serio, NULL);
127 input_unregister_device(stinger->dev);
128 kfree(stinger);
129}
130
131/*
132 * stinger_connect() is the routine that is called when someone adds a
133 * new serio device that supports Stinger protocol and registers it as
134 * an input device.
135 */
136
137static int stinger_connect(struct serio *serio, struct serio_driver *drv)
138{
139 struct stinger *stinger;
140 struct input_dev *input_dev;
141 int err = -ENOMEM;
142
143 stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL);
144 input_dev = input_allocate_device();
145 if (!stinger || !input_dev)
146 goto fail;
147
148 stinger->dev = input_dev;
149 snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys);
150
151 input_dev->name = "Gravis Stinger";
152 input_dev->phys = stinger->phys;
153 input_dev->id.bustype = BUS_RS232;
154 input_dev->id.vendor = SERIO_STINGER;
155 input_dev->id.product = 0x0001;
156 input_dev->id.version = 0x0100;
157 input_dev->cdev.dev = &serio->dev;
158 input_dev->private = stinger;
159
160 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
161 input_dev->keybit[LONG(BTN_A)] = BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_X) |
162 BIT(BTN_Y) | BIT(BTN_Z) | BIT(BTN_TL) | BIT(BTN_TR) |
163 BIT(BTN_START) | BIT(BTN_SELECT);
164 input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4);
165 input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4);
166
167 serio_set_drvdata(serio, stinger);
168
169 err = serio_open(serio, drv);
170 if (err)
171 goto fail;
172
173 input_register_device(stinger->dev);
174 return 0;
175
176 fail: serio_set_drvdata(serio, NULL);
177 input_free_device(input_dev);
178 kfree(stinger);
179 return err;
180}
181
182/*
183 * The serio driver structure.
184 */
185
186static struct serio_device_id stinger_serio_ids[] = {
187 {
188 .type = SERIO_RS232,
189 .proto = SERIO_STINGER,
190 .id = SERIO_ANY,
191 .extra = SERIO_ANY,
192 },
193 { 0 }
194};
195
196MODULE_DEVICE_TABLE(serio, stinger_serio_ids);
197
198static struct serio_driver stinger_drv = {
199 .driver = {
200 .name = "stinger",
201 },
202 .description = DRIVER_DESC,
203 .id_table = stinger_serio_ids,
204 .interrupt = stinger_interrupt,
205 .connect = stinger_connect,
206 .disconnect = stinger_disconnect,
207};
208
209/*
210 * The functions for inserting/removing us as a module.
211 */
212
213static int __init stinger_init(void)
214{
215 serio_register_driver(&stinger_drv);
216 return 0;
217}
218
219static void __exit stinger_exit(void)
220{
221 serio_unregister_driver(&stinger_drv);
222}
223
224module_init(stinger_init);
225module_exit(stinger_exit);