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/drivers/input/joystick/stinger.c

https://bitbucket.org/evzijst/gittest
C | 236 lines | 129 code | 49 blank | 58 comment | 7 complexity | 9af34874918f19e8a713facce2842dc4 MD5 | raw file
  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
 51static char *stinger_name = "Gravis Stinger";
 52
 53/*
 54 * Per-Stinger data.
 55 */
 56
 57struct stinger {
 58	struct input_dev dev;
 59	int idx;
 60	unsigned char data[STINGER_MAX_LENGTH];
 61	char phys[32];
 62};
 63
 64/*
 65 * stinger_process_packet() decodes packets the driver receives from the
 66 * Stinger. It updates the data accordingly.
 67 */
 68
 69static void stinger_process_packet(struct stinger *stinger, struct pt_regs *regs)
 70{
 71	struct input_dev *dev = &stinger->dev;
 72	unsigned char *data = stinger->data;
 73
 74	if (!stinger->idx) return;
 75
 76	input_regs(dev, regs);
 77
 78	input_report_key(dev, BTN_A,	  ((data[0] & 0x20) >> 5));
 79	input_report_key(dev, BTN_B,	  ((data[0] & 0x10) >> 4));
 80	input_report_key(dev, BTN_C,	  ((data[0] & 0x08) >> 3));
 81	input_report_key(dev, BTN_X,	  ((data[0] & 0x04) >> 2));
 82	input_report_key(dev, BTN_Y,	  ((data[3] & 0x20) >> 5));
 83	input_report_key(dev, BTN_Z,	  ((data[3] & 0x10) >> 4));
 84	input_report_key(dev, BTN_TL,     ((data[3] & 0x08) >> 3));
 85	input_report_key(dev, BTN_TR,     ((data[3] & 0x04) >> 2));
 86	input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1));
 87	input_report_key(dev, BTN_START,   (data[3] & 0x01));
 88
 89	input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
 90	input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
 91
 92	input_sync(dev);
 93
 94	return;
 95}
 96
 97/*
 98 * stinger_interrupt() is called by the low level driver when characters
 99 * are ready for us. We then buffer them for further processing, or call the
100 * packet processing routine.
101 */
102
103static irqreturn_t stinger_interrupt(struct serio *serio,
104	unsigned char data, unsigned int flags, struct pt_regs *regs)
105{
106	struct stinger *stinger = serio_get_drvdata(serio);
107
108	/* All Stinger packets are 4 bytes */
109
110	if (stinger->idx < STINGER_MAX_LENGTH)
111		stinger->data[stinger->idx++] = data;
112
113	if (stinger->idx == 4) {
114		stinger_process_packet(stinger, regs);
115		stinger->idx = 0;
116	}
117
118	return IRQ_HANDLED;
119}
120
121/*
122 * stinger_disconnect() is the opposite of stinger_connect()
123 */
124
125static void stinger_disconnect(struct serio *serio)
126{
127	struct stinger *stinger = serio_get_drvdata(serio);
128
129	input_unregister_device(&stinger->dev);
130	serio_close(serio);
131	serio_set_drvdata(serio, NULL);
132	kfree(stinger);
133}
134
135/*
136 * stinger_connect() is the routine that is called when someone adds a
137 * new serio device that supports Stinger protocol and registers it as
138 * an input device.
139 */
140
141static int stinger_connect(struct serio *serio, struct serio_driver *drv)
142{
143	struct stinger *stinger;
144	int i;
145	int err;
146
147	if (!(stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL)))
148		return -ENOMEM;
149
150	memset(stinger, 0, sizeof(struct stinger));
151
152	stinger->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
153	stinger->dev.keybit[LONG(BTN_A)] = BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_X) | \
154					   BIT(BTN_Y) | BIT(BTN_Z) | BIT(BTN_TL) | BIT(BTN_TR) | \
155					   BIT(BTN_START) | BIT(BTN_SELECT);
156	stinger->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
157
158	sprintf(stinger->phys, "%s/serio0", serio->phys);
159
160	init_input_dev(&stinger->dev);
161	stinger->dev.name = stinger_name;
162	stinger->dev.phys = stinger->phys;
163	stinger->dev.id.bustype = BUS_RS232;
164	stinger->dev.id.vendor = SERIO_STINGER;
165	stinger->dev.id.product = 0x0001;
166	stinger->dev.id.version = 0x0100;
167	stinger->dev.dev = &serio->dev;
168
169	for (i = 0; i < 2; i++) {
170		stinger->dev.absmax[ABS_X+i] =  64;
171		stinger->dev.absmin[ABS_X+i] = -64;
172		stinger->dev.absflat[ABS_X+i] = 4;
173	}
174
175	stinger->dev.private = stinger;
176
177	serio_set_drvdata(serio, stinger);
178
179	err = serio_open(serio, drv);
180	if (err) {
181		serio_set_drvdata(serio, NULL);
182		kfree(stinger);
183		return err;
184	}
185
186	input_register_device(&stinger->dev);
187
188	printk(KERN_INFO "input: %s on %s\n",  stinger_name, serio->phys);
189
190	return 0;
191}
192
193/*
194 * The serio driver structure.
195 */
196
197static struct serio_device_id stinger_serio_ids[] = {
198	{
199		.type	= SERIO_RS232,
200		.proto	= SERIO_STINGER,
201		.id	= SERIO_ANY,
202		.extra	= SERIO_ANY,
203	},
204	{ 0 }
205};
206
207MODULE_DEVICE_TABLE(serio, stinger_serio_ids);
208
209static struct serio_driver stinger_drv = {
210	.driver		= {
211		.name	= "stinger",
212	},
213	.description	= DRIVER_DESC,
214	.id_table	= stinger_serio_ids,
215	.interrupt	= stinger_interrupt,
216	.connect	= stinger_connect,
217	.disconnect	= stinger_disconnect,
218};
219
220/*
221 * The functions for inserting/removing us as a module.
222 */
223
224static int __init stinger_init(void)
225{
226	serio_register_driver(&stinger_drv);
227	return 0;
228}
229
230static void __exit stinger_exit(void)
231{
232	serio_unregister_driver(&stinger_drv);
233}
234
235module_init(stinger_init);
236module_exit(stinger_exit);