2 * $Id: stinger.c,v 1.10 2002/01/22 20:29:31 vojtech Exp $
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 * Copyright (c) 2000 Mark Fletcher
9 * Gravis Stinger gamepad driver for Linux
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.
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.
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
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
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>
39 #define DRIVER_DESC "Gravis Stinger gamepad driver"
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42 MODULE_DESCRIPTION(DRIVER_DESC);
43 MODULE_LICENSE("GPL");
49 #define STINGER_MAX_LENGTH 8
56 struct input_dev *dev;
58 unsigned char data[STINGER_MAX_LENGTH];
63 * stinger_process_packet() decodes packets the driver receives from the
64 * Stinger. It updates the data accordingly.
67 static void stinger_process_packet(struct stinger *stinger)
69 struct input_dev *dev = stinger->dev;
70 unsigned char *data = stinger->data;
72 if (!stinger->idx) return;
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));
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));
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.
99 static irqreturn_t stinger_interrupt(struct serio *serio,
100 unsigned char data, unsigned int flags)
102 struct stinger *stinger = serio_get_drvdata(serio);
104 /* All Stinger packets are 4 bytes */
106 if (stinger->idx < STINGER_MAX_LENGTH)
107 stinger->data[stinger->idx++] = data;
109 if (stinger->idx == 4) {
110 stinger_process_packet(stinger);
118 * stinger_disconnect() is the opposite of stinger_connect()
121 static void stinger_disconnect(struct serio *serio)
123 struct stinger *stinger = serio_get_drvdata(serio);
126 serio_set_drvdata(serio, NULL);
127 input_unregister_device(stinger->dev);
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
137 static int stinger_connect(struct serio *serio, struct serio_driver *drv)
139 struct stinger *stinger;
140 struct input_dev *input_dev;
143 stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL);
144 input_dev = input_allocate_device();
145 if (!stinger || !input_dev)
148 stinger->dev = input_dev;
149 snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys);
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->dev.parent = &serio->dev;
159 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
160 input_dev->keybit[BIT_WORD(BTN_A)] = BIT_MASK(BTN_A) | BIT_MASK(BTN_B) |
161 BIT_MASK(BTN_C) | BIT_MASK(BTN_X) | BIT_MASK(BTN_Y) |
162 BIT_MASK(BTN_Z) | BIT_MASK(BTN_TL) | BIT_MASK(BTN_TR) |
163 BIT_MASK(BTN_START) | BIT_MASK(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);
167 serio_set_drvdata(serio, stinger);
169 err = serio_open(serio, drv);
173 err = input_register_device(stinger->dev);
179 fail3: serio_close(serio);
180 fail2: serio_set_drvdata(serio, NULL);
181 fail1: input_free_device(input_dev);
187 * The serio driver structure.
190 static struct serio_device_id stinger_serio_ids[] = {
193 .proto = SERIO_STINGER,
200 MODULE_DEVICE_TABLE(serio, stinger_serio_ids);
202 static struct serio_driver stinger_drv = {
206 .description = DRIVER_DESC,
207 .id_table = stinger_serio_ids,
208 .interrupt = stinger_interrupt,
209 .connect = stinger_connect,
210 .disconnect = stinger_disconnect,
214 * The functions for inserting/removing us as a module.
217 static int __init stinger_init(void)
219 return serio_register_driver(&stinger_drv);
222 static void __exit stinger_exit(void)
224 serio_unregister_driver(&stinger_drv);
227 module_init(stinger_init);
228 module_exit(stinger_exit);