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

• Lines: 209
• Date: Thu Oct 8 17:25:16 1998
• Orig file: v2.1.124/linux/drivers/char/joystick/joy-analog.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.124/linux/drivers/char/joystick/joy-analog.c linux/drivers/char/joystick/joy-analog.c
@@ -0,0 +1,208 @@
+/*
+ *  joy-analog.c  Version 1.2
+ *
+ *  Copyright (c) 1996-1998 Vojtech Pavlik
+ */
+
+/*
+ * This is a module for the Linux joystick driver, supporting
+ * up to two analog (or CHF/FCS) joysticks on a single 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/io.h>
+#include <linux/delay.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>
+
+#define JS_AN_MAX_TIME 3000
+
+static int js_an_port_list[] __initdata = {0x201, 0};
+static struct js_port* js_an_port __initdata = NULL;
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_PARM(js_an, "2-24i");
+
+static int js_an[]={-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0};
+
+#include "joy-analog.h"
+
+/*
+ * js_an_read() reads analog joystick data.
+ */
+
+static int js_an_read(void *xinfo, int **axes, int **buttons)
+{
+	struct js_an_info *info = xinfo;
+	unsigned char buf[4];
+	int time[4];
+	unsigned char u, v, a;
+	unsigned int t, t1;
+	int i, j;
+	int timeout;
+	int io = info->io;
+
+	timeout = (JS_AN_MAX_TIME * js_time_speed_a) >> 10;
+
+	info->buttons = (~inb(io) & JS_AN_BUTTONS_STD) >> 4;
+
+	i = 0;
+	u = a = ((info->mask[0] | info->mask[1]) & JS_AN_AXES_STD) | (info->extensions & JS_AN_HAT_FCS)
+	      | ((info->extensions & JS_AN_BUTTONS_PXY_XY) >> 2) | ((info->extensions & JS_AN_BUTTONS_PXY_UV) >> 4);
+
+	outb(inb(io),io);
+	t = js_get_time_a();
+	do {
+		v = inb(io) & a;
+		t1 = js_get_time_a();
+		if (u ^ v) {
+			time[i] = js_delta_a(t1,t);
+			buf[i] = u ^ v;
+			u = v;
+			i++;
+		}
+	} while (v && js_delta_a(t1,t) < timeout);
+
+	for (--i; i >= 0; i--)
+		for (j = 0; j < 4; j++)
+			if (buf[i] & (1 << j)) info->axes[j] = (time[i] << 10) / js_time_speed_a;
+
+	js_an_decode(info, axes, buttons);
+
+	return 0;
+}
+
+/*
+ * js_an_open() is a callback from the file open routine.
+ */
+
+static int js_an_open(struct js_dev *jd)
+{
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_an_close() is a callback from the file release routine.
+ */
+
+static int js_an_close(struct js_dev *jd)
+{
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_an_probe() probes for analog joysticks.
+ */
+
+static struct js_port __init *js_an_probe(int io, int mask0, int mask1, struct js_port *port)
+{
+	struct js_an_info info;
+	int i, numdev;
+	unsigned char u;
+
+	if (io < 0) return port;
+
+	if (check_region(io, 1)) return port;
+
+	if (((u = inb(io)) & 3) == 3) return port;
+	outb(u,io);
+	u = inb(io);
+	udelay(JS_AN_MAX_TIME);
+	u = (inb(io) ^ u) & u;
+
+	if (!u) return port;
+	if (u & 0xf0) return port;
+
+	if ((numdev = js_an_probe_devs(&info, u, mask0, mask1, port)) <= 0)
+		return port;
+
+	info.io = io;
+	request_region(info.io, 1, "joystick (analog)");
+	port = js_register_port(port, &info, numdev, sizeof(struct js_an_info), js_an_read);
+
+	for (i = 0; i < numdev; i++)
+		printk(KERN_INFO "js%d: %s at %#x\n",
+			js_register_device(port, i, js_an_axes(i, &info), js_an_buttons(i, &info),
+				js_an_name(i, &info), js_an_open, js_an_close),
+			js_an_name(i, &info), info.io);
+
+	js_an_read(port->info, port->axes, port->buttons);
+	js_an_init_corr(port->info, port->axes, port->corr, 8);
+
+	return port;
+}
+
+#ifndef MODULE
+void __init js_an_setup(char *str, int *ints)
+{
+	int i;
+	for (i = 0; i <= ints[0] && i < 24; i++) js_an[i] = ints[i+1];
+}
+#endif
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init js_an_init(void)
+#endif
+{
+	int i;
+
+	if (js_an[0] >= 0) {
+		for (i = 0; (js_an[i*3] >= 0) && i < 8; i++)
+			js_an_port = js_an_probe(js_an[i*3], js_an[i*3+1], js_an[i*3+2], js_an_port);
+	} else {
+		for (i = 0; js_an_port_list[i]; i++)
+			js_an_port = js_an_probe(js_an_port_list[i], 0, 0, js_an_port);
+	}
+	if (js_an_port) return 0;
+
+#ifdef MODULE
+	printk(KERN_WARNING "joy-analog: no joysticks found\n");
+#endif
+
+	return -ENODEV;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	int i;
+	struct js_an_info *info;
+
+	while (js_an_port) {
+		for (i = 0; i < js_an_port->ndevs; i++)
+			if (js_an_port->devs[i])
+				js_unregister_device(js_an_port->devs[i]);
+		info = js_an_port->info;
+		release_region(info->io, 1);
+		js_an_port = js_unregister_port(js_an_port);
+	}
+
+}
+#endif