turbografx.c
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上传日期:2013-04-10
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- /*
- * $Id: turbografx.c,v 1.8 2000/05/29 20:39:38 vojtech Exp $
- *
- * Copyright (c) 1998-2000 Vojtech Pavlik
- *
- * Based on the work of:
- * Steffen Schwenke
- *
- * Sponsored by SuSE
- */
- /*
- * TurboGraFX parallel port interface driver for Linux.
- */
- /*
- * This program is free software; 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
- *
- * Should you need to contact me, the author, you can do so either by
- * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
- * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
- */
- #include <linux/kernel.h>
- #include <linux/parport.h>
- #include <linux/input.h>
- #include <linux/module.h>
- #include <linux/init.h>
- MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
- MODULE_LICENSE("GPL");
- MODULE_PARM(tgfx, "2-8i");
- MODULE_PARM(tgfx_2, "2-8i");
- MODULE_PARM(tgfx_3, "2-8i");
- #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
- #define TGFX_TRIGGER 0x08
- #define TGFX_UP 0x10
- #define TGFX_DOWN 0x20
- #define TGFX_LEFT 0x40
- #define TGFX_RIGHT 0x80
- #define TGFX_THUMB 0x02
- #define TGFX_THUMB2 0x04
- #define TGFX_TOP 0x01
- #define TGFX_TOP2 0x08
- static int tgfx[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
- static int tgfx_2[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
- static int tgfx_3[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
- static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
- static char *tgfx_name = "TurboGraFX Multisystem joystick";
- struct tgfx {
- struct pardevice *pd;
- struct timer_list timer;
- struct input_dev dev[7];
- int sticks;
- int used;
- } *tgfx_base[3];
- /*
- * tgfx_timer() reads and analyzes TurboGraFX joystick data.
- */
- static void tgfx_timer(unsigned long private)
- {
- struct tgfx *tgfx = (void *) private;
- struct input_dev *dev;
- int data1, data2, i;
- for (i = 0; i < 7; i++)
- if (tgfx->sticks & (1 << i)) {
- dev = tgfx->dev + i;
- parport_write_data(tgfx->pd->port, ~(1 << i));
- data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
- data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
- input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
- input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
- input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
- input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
- input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
- input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
- input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
- }
- mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
- }
- static int tgfx_open(struct input_dev *dev)
- {
- struct tgfx *tgfx = dev->private;
- if (!tgfx->used++) {
- parport_claim(tgfx->pd);
- parport_write_control(tgfx->pd->port, 0x04);
- mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
- }
- return 0;
- }
- static void tgfx_close(struct input_dev *dev)
- {
- struct tgfx *tgfx = dev->private;
- if (!--tgfx->used) {
- del_timer(&tgfx->timer);
- parport_write_control(tgfx->pd->port, 0x00);
- parport_release(tgfx->pd);
- }
- }
- /*
- * tgfx_probe() probes for tg gamepads.
- */
- static struct tgfx __init *tgfx_probe(int *config)
- {
- struct tgfx *tgfx;
- struct parport *pp;
- int i, j;
- if (config[0] < 0)
- return NULL;
- for (pp = parport_enumerate(); pp && (config[0] > 0); pp = pp->next)
- config[0]--;
- if (!pp) {
- printk(KERN_ERR "turbografx.c: no such parportn");
- return NULL;
- }
- if (!(tgfx = kmalloc(sizeof(struct tgfx), GFP_KERNEL)))
- return NULL;
- memset(tgfx, 0, sizeof(struct tgfx));
- tgfx->pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
- if (!tgfx->pd) {
- printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?n");
- kfree(tgfx);
- return NULL;
- }
- init_timer(&tgfx->timer);
- tgfx->timer.data = (long) tgfx;
- tgfx->timer.function = tgfx_timer;
- tgfx->sticks = 0;
- for (i = 0; i < 7; i++)
- if (config[i+1] > 0 && config[i+1] < 6) {
- tgfx->sticks |= (1 << i);
- tgfx->dev[i].private = tgfx;
- tgfx->dev[i].open = tgfx_open;
- tgfx->dev[i].close = tgfx_close;
- tgfx->dev[i].name = tgfx_name;
- tgfx->dev[i].idbus = BUS_PARPORT;
- tgfx->dev[i].idvendor = 0x0003;
- tgfx->dev[i].idproduct = config[i+1];
- tgfx->dev[i].idversion = 0x0100;
- tgfx->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- tgfx->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
- for (j = 0; j < config[i+1]; j++)
- set_bit(tgfx_buttons[j], tgfx->dev[i].keybit);
- tgfx->dev[i].absmin[ABS_X] = -1; tgfx->dev[i].absmax[ABS_X] = 1;
- tgfx->dev[i].absmin[ABS_Y] = -1; tgfx->dev[i].absmax[ABS_Y] = 1;
- input_register_device(tgfx->dev + i);
- printk(KERN_INFO "input%d: %d-button Multisystem joystick on %sn",
- tgfx->dev[i].number, config[i+1], tgfx->pd->port->name);
- }
- if (!tgfx->sticks) {
- parport_unregister_device(tgfx->pd);
- kfree(tgfx);
- return NULL;
- }
-
- return tgfx;
- }
- #ifndef MODULE
- int __init tgfx_setup(char *str)
- {
- int i, ints[9];
- get_options(str, ARRAY_SIZE(ints), ints);
- for (i = 0; i <= ints[0] && i < 8; i++) tgfx[i] = ints[i + 1];
- return 1;
- }
- int __init tgfx_setup_2(char *str)
- {
- int i, ints[9];
- get_options(str, ARRAY_SIZE(ints), ints);
- for (i = 0; i <= ints[0] && i < 8; i++) tgfx_2[i] = ints[i + 1];
- return 1;
- }
- int __init tgfx_setup_3(char *str)
- {
- int i, ints[9];
- get_options(str, ARRAY_SIZE(ints), ints);
- for (i = 0; i <= ints[0] && i < 8; i++) tgfx_3[i] = ints[i + 1];
- return 1;
- }
- __setup("tgfx=", tgfx_setup);
- __setup("tgfx_2=", tgfx_setup_2);
- __setup("tgfx_3=", tgfx_setup_3);
- #endif
- int __init tgfx_init(void)
- {
- tgfx_base[0] = tgfx_probe(tgfx);
- tgfx_base[1] = tgfx_probe(tgfx_2);
- tgfx_base[2] = tgfx_probe(tgfx_3);
- if (tgfx_base[0] || tgfx_base[1] || tgfx_base[2])
- return 0;
- return -ENODEV;
- }
- void __exit tgfx_exit(void)
- {
- int i, j;
- for (i = 0; i < 3; i++)
- if (tgfx_base[i]) {
- for (j = 0; j < 7; j++)
- if (tgfx_base[i]->sticks & (1 << j))
- input_unregister_device(tgfx_base[i]->dev + j);
- parport_unregister_device(tgfx_base[i]->pd);
- }
- }
- module_init(tgfx_init);
- module_exit(tgfx_exit);