patch-2.1.125 linux/drivers/char/joystick/joy-amiga.c

• Lines: 158
• Date: Thu Oct 8 17:25:16 1998
• Orig file: v2.1.124/linux/drivers/char/joystick/joy-amiga.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.124/linux/drivers/char/joystick/joy-amiga.c linux/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) {
+		if (js_am_port->devs[0])
+			js_unregister_device(js_am_port->devs[0]);
+		js_am_port = js_unregister_port(js_am_port);
+	}
+}
+#endif