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

• Lines: 283
• Date: Thu Oct 8 17:25:16 1998
• Orig file: v2.1.124/linux/drivers/char/joystick/joy-turbografx.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.124/linux/drivers/char/joystick/joy-turbografx.c linux/drivers/char/joystick/joy-turbografx.c
@@ -0,0 +1,282 @@
+/*
+ *  joy-turbografx.c  Version 1.2
+ *
+ *  Copyright (c) 1998 Vojtech Pavlik
+ */
+
+/*
+ * This is a module for the Linux joystick driver, supporting
+ * Steffen Schwenke's <schwenke@burg-halle.de> TurboGraFX parallel port
+ * interface.
+ */
+
+/*
+ * 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/io.h>
+#include <asm/system.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/joystick.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_PARM(js_tg, "2i");
+MODULE_PARM(js_tg_2, "0-2i");
+MODULE_PARM(js_tg_3, "0-2i");
+
+#define JS_TG_BUTTON	3
+#define JS_TG_UP	4
+#define JS_TG_DOWN	5
+#define JS_TG_LEFT	6
+#define JS_TG_RIGHT	7
+
+static struct js_port* js_tg_port = NULL;
+
+static int js_tg[] __initdata = { -1, 0 };
+static int js_tg_2[] __initdata = { -1, 0 };
+static int js_tg_3[] __initdata = { -1, 0 };
+
+struct js_tg_info {
+#ifdef USE_PARPORT
+	struct pardevice *port;	/* parport device */
+	int use;		/* use count */
+	int wanted;		/* parport wanted */
+#else
+	int port;		/* hw port */
+#endif
+	int count;		/* number of joysticks */
+};
+
+/*
+ * js_tg_read() reads and analyzes tg joystick data.
+ */
+
+static int js_tg_read(void *xinfo, int **axes, int **buttons)
+{
+	struct js_tg_info *info = xinfo;
+	int data, i;
+
+	for (i = 0; i < info->count; i++) {
+
+		JS_PAR_DATA_OUT(~(1 << i), info->port);
+		data = JS_PAR_STATUS(info->port) ^ ~JS_PAR_STATUS_INVERT;
+
+		axes[i][0] = ((data >> JS_TG_RIGHT) & 1) - ((data >> JS_TG_LEFT) & 1);
+		axes[i][1] = ((data >> JS_TG_DOWN ) & 1) - ((data >> JS_TG_UP  ) & 1);
+
+		buttons[i][0] = (data >> JS_TG_BUTTON) & 1;
+
+	}
+
+	return 0;
+}
+
+/*
+ * open callback: claim parport.
+ */
+
+int js_tg_open(struct js_dev *dev)
+{
+	MOD_INC_USE_COUNT;
+
+#ifdef USE_PARPORT
+	{
+		struct js_tg_info *info = dev->port->info;
+		if (!info->use && parport_claim(info->port)) {
+			printk(KERN_WARNING "joy-tg: parport busy\n");		/* port currently not available ... */
+			info->wanted++;						/* we'll claim it on wakeup */
+			return 0;
+		}
+		info->use++;
+	}
+#endif
+	return 0;
+}
+
+/*
+ * close callback: release parport
+ */
+
+int js_tg_close(struct js_dev *dev)
+{
+#ifdef USE_PARPORT
+	struct js_tg_info *info = dev->port->info;
+
+	if (!--info->use)
+		parport_release(info->port);
+#endif
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+/*
+ * parport wakeup callback: claim the port!
+ */
+
+#ifdef USE_PARPORT
+static void js_tg_wakeup(void *v)
+{
+	struct js_tg_info *info = js_tg_port->info;	/* FIXME! We can have more than 1 port! */
+
+	if (!info->use && info->wanted)
+	{
+		parport_claim(info->port);
+		info->use++;
+		info->wanted--;
+	}
+}
+#endif
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	struct js_tg_info *info;
+	int i;
+
+	while (js_tg_port) {
+		for (i = 0; i < js_tg_port->ndevs; i++)
+			if (js_tg_port->devs[i])
+				js_unregister_device(js_tg_port->devs[i]);
+		info = js_tg_port->info;
+#ifdef USE_PARPORT
+		parport_unregister_device(info->port);
+#else
+		release_region(info->port, 3);
+#endif
+		js_tg_port = js_unregister_port(js_tg_port);
+	}
+}
+#endif
+
+/*
+ * js_tg_init_corr() initializes correction values of
+ * tg gamepads.
+ */
+
+static void __init js_tg_init_corr(int count, struct js_corr **corr)
+{
+	int i, j;
+
+	for (i = 0; i < count; i++)
+		for (j = 0; j < 2; j++) {
+			corr[i][j].type = JS_CORR_BROKEN;
+			corr[i][j].prec = 0;
+			corr[i][j].coef[0] = 0;
+			corr[i][j].coef[1] = 0;
+			corr[i][j].coef[2] = (1 << 29);
+			corr[i][j].coef[3] = (1 << 29);
+		}
+}
+
+/*
+ * js_tg_probe() probes for tg gamepads.
+ */
+
+static struct js_port __init *js_tg_probe(int *config, struct js_port *port)
+{
+	struct js_tg_info info;
+	int i;
+
+	if (config[0] < 0) return port;
+	if (config[1] < 1 || config[1] > 8) return port;
+
+#ifdef USE_PARPORT
+	{
+		struct parport *pp;
+
+		if (config[0] > 0x10)
+			for (pp=parport_enumerate(); pp && (pp->base!=config[0]); pp=pp->next);
+		else
+			for (pp=parport_enumerate(); pp && (config[0]>0); pp=pp->next) config[0]--;
+
+		if (!pp) {
+			printk(KERN_ERR "joy-tg: no such parport\n");
+			return port;
+		}
+
+		info.port = parport_register_device(pp, "joystick (turbografx)", NULL, js_tg_wakeup, NULL, 0, NULL);
+		info.wanted = 0;
+		info.use = 0;
+	}
+#else
+	info.port = config[0];
+	if (check_region(info.port, 3)) return port;
+	request_region(info.port, 3, "joystick (turbografx)");
+#endif
+
+	info.count = config[1];
+
+	port = js_register_port(port, &info, info.count, sizeof(struct js_tg_info), js_tg_read);
+
+
+	for (i = 0; i < info.count; i++)
+#ifdef USE_PARPORT
+		printk(KERN_INFO "js%d: Multisystem joystick on %s\n",
+			js_register_device(port, i, 2, 1, "Multisystem joystick", js_tg_open, js_tg_close),
+			info.port->port->name);
+#else
+		printk(KERN_INFO "js%d: Multisystem joystick at %#x\n",
+			js_register_device(port, i, 2, 1, "Multisystem joystick", js_tg_open, js_tg_close),
+			info.port);
+#endif
+
+	js_tg_init_corr(info.count, port->corr);
+
+	return port;
+}
+
+#ifndef MODULE
+void __init js_tg_setup(char *str, int *ints)
+{
+	int i;
+
+	if (!strcmp(str,"js_tg"))
+		for (i = 0; i <= ints[0] && i < 2; i++) js_tg[i] = ints[i+1];
+	if (!strcmp(str,"js_tg_2"))
+		for (i = 0; i <= ints[0] && i < 2; i++) js_tg_2[i] = ints[i+1];
+	if (!strcmp(str,"js_tg_3"))
+		for (i = 0; i <= ints[0] && i < 2; i++) js_tg_3[i] = ints[i+1];
+
+}
+#endif
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init js_tg_init(void)
+#endif
+{
+	js_tg_port = js_tg_probe(js_tg, js_tg_port);
+	js_tg_port = js_tg_probe(js_tg_2, js_tg_port);
+	js_tg_port = js_tg_probe(js_tg_3, js_tg_port);
+
+	if (js_tg_port) return 0;
+
+#ifdef MODULE
+	printk(KERN_WARNING "joy-tg: no joysticks specified\n");
+#endif
+	return -ENODEV;
+}