diff options
Diffstat (limited to 'drivers/char/joystick/joy-amiga.c')
| -rw-r--r-- | drivers/char/joystick/joy-amiga.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/char/joystick/joy-amiga.c b/drivers/char/joystick/joy-amiga.c new file mode 100644 index 000000000..520f262a4 --- /dev/null +++ b/drivers/char/joystick/joy-amiga.c @@ -0,0 +1,157 @@ +/* + * joy-amiga.c Version 1.2 + * + * Copyright (c) 1998 Vojtech Pavlik + */ + +/* + * This is a module for the Linux joystick driver, supporting + * microswitch based joystick connected to Amiga joystick port. + */ + +/* + * 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@ucw.cz>, or by paper mail: + * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic + */ + +#include <asm/system.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/joystick.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <asm/amigahw.h> + +static struct js_port* js_am_port __initdata = NULL; + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_PARM(js_am, "1-2i"); + +static int js_am[]={0,0}; + +/* + * js_am_read() reads and Amiga joystick data. + */ + +static int js_am_read(void *info, int **axes, int **buttons) +{ + int data = 0; + + switch (*(int*)info) { + case 0: + data = ~custom.joy0dat; + buttons[0][0] = (~ciaa.pra >> 6) & 1; + break; + + case 1: + data = ~custom.joy1dat; + buttons[0][0] = (~ciaa.pra >> 7) & 1; + break; + + default: + return -1; + } + + axes[0][0] = ((data >> 1) & 1) - ((data >> 9) & 1); + data = ~(data ^ (data << 1)); + axes[0][0] = ((data >> 1) & 1) - ((data >> 9) & 1); + + return 0; +} + +/* + * js_am_open() is a callback from the file open routine. + */ + +static int js_am_open(struct js_dev *jd) +{ + MOD_INC_USE_COUNT; + return 0; +} + +/* + * js_am_close() is a callback from the file release routine. + */ + +static int js_am_close(struct js_dev *jd) +{ + MOD_DEC_USE_COUNT; + return 0; +} + +/* + * js_am_init_corr() initializes correction values of + * Amiga joysticks. + */ + +static void __init js_am_init_corr(struct js_corr **corr) +{ + int i; + + for (i = 0; i < 2; i++) { + corr[0][i].type = JS_CORR_BROKEN; + corr[0][i].prec = 0; + corr[0][i].coef[0] = 0; + corr[0][i].coef[1] = 0; + corr[0][i].coef[2] = (1 << 29); + corr[0][i].coef[3] = (1 << 29); + } +} + +#ifndef MODULE +void __init js_am_setup(char *str, int *ints) +{ + int i; + for (i = 0; i <= ints[0] && i < 2; i++) js_am[i] = ints[i+1]; +} +#endif + +#ifdef MODULE +int init_module(void) +#else +int __init js_am_init(void) +#endif +{ + int i; + + for (i = 0; i < 2; i++) + if (js_am[i]) { + js_am_port = js_register_port(js_am_port, &i, 1, sizeof(int), js_am_read); + printk(KERN_INFO "js%d: Amiga joystick at joy%ddat\n", + js_register_device(js_am_port, 0, 2, 1, "Amiga joystick", js_am_open, js_am_close), i); + js_am_init_corr(js_am_port->corr); + } + if (js_am_port) return 0; + +#ifdef MODULE + printk(KERN_WARNING "joy-amiga: no joysticks specified\n"); +#endif + + return -ENODEV; +} + +#ifdef MODULE +void cleanup_module(void) +{ + while (js_am_port != NULL) { + if (js_am_port->devs[0] != NULL) + js_unregister_device(js_am_port->devs[0]); + js_am_port = js_unregister_port(js_am_port); + } +} +#endif |