patch-2.3.31 linux/drivers/char/joystick/joy-warrior.c

• Lines: 319
• Date: Tue Dec 7 10:13:11 1999
• Orig file: v2.3.30/linux/drivers/char/joystick/joy-warrior.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.30/linux/drivers/char/joystick/joy-warrior.c linux/drivers/char/joystick/joy-warrior.c
@@ -0,0 +1,318 @@
+/*
+ *  joy-warrior.c  Version 0.1
+ *
+ *  Copyright (c) 1998 David Thompson
+ *  Copyright (c) 1999 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * This is a module for the Linux joystick driver, supporting
+ * the Logitech WingMan Warrior joystick.
+ */
+
+/*
+ * This program is free warftware; 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 <asm/io.h>
+#include <asm/system.h>
+#include <linux/errno.h>
+#include <linux/joystick.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+
+/*
+ * Constants.
+ */
+
+#define	N_JOYSTICK_WAR		13
+#define JS_WAR_MAX_LENGTH	16
+
+/*
+ * List of Warriors.
+ */
+
+static struct js_port* js_war_port = NULL;
+
+static char js_war_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 }; 
+
+/*
+ * Per-Warrior data.
+ */
+
+struct js_war_info {
+	struct tty_struct* tty;
+	struct js_port* port;
+	int idx;
+	int len;
+	unsigned char data[JS_WAR_MAX_LENGTH];
+	char used;
+};
+
+/*
+ * js_war_process_packet() decodes packets the driver receives from the
+ * Warrior. It updates the data accordingly.
+ */
+
+static void js_war_process_packet(struct js_war_info* info)
+{
+	int **axes = info->port->axes;
+	int **buttons = info->port->buttons;
+	unsigned char *data = info->data;
+	int i;
+
+	if (!info->idx) return;
+
+	switch ((data[0] >> 4) & 7) {
+
+		case 1:					/* Button data */
+			if (!info->port->devs[0]) return;
+			buttons[0][0] = ((data[3] & 0xa) >> 1) | ((data[3] & 0x5) << 1);
+			return;
+		case 2:					/* Static status (Send !S to get one) */
+#if 0
+			printk("joy-warrior: Static status:");
+			for (i = 0; i < 12; i++)
+				printk(" %02x", info->data[i]);
+			printk("\n");
+#endif
+			return;
+		case 3:					/* XY-axis info->data */
+			if (!info->port->devs[0]) return;
+			axes[0][0] = ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5));
+			axes[0][1] = (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7);
+			return;
+			break;
+		case 4:					/* Dynamic status */
+#if 0
+			printk("joy-warrior: Dynamic status:");
+			for (i = 0; i < 4; i++)
+				printk(" %02x", info->data[i]);
+			printk("\n");
+#endif
+			return;
+		case 5:					/* Throttle, spinner, hat info->data */
+			if (!info->port->devs[0]) return;
+			axes[0][2] = (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7);
+			axes[0][3] = (data[3] & 2 ? 1 : 0) - (info->data[3] & 1 ? 1 : 0);
+			axes[0][4] = (data[3] & 8 ? 1 : 0) - (info->data[3] & 4 ? 1 : 0);
+			axes[0][5] = (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5);
+			return;
+		default:
+			printk("joy-warrior: Unknown packet %d length %d:", (data[0] >> 4) & 7, info->idx);
+			for (i = 0; i < info->idx; i++)
+				printk(" %02x", data[i]);
+			printk("\n");
+			return;
+	}
+}
+
+/*
+ * js_war_open() is a callback from the joystick device open routine.
+ */
+
+static int js_war_open(struct js_dev *jd)
+{
+	struct js_war_info *info = jd->port->info;
+	info->used++;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_war_close() is a callback from the joystick device release routine.
+ */
+
+static int js_war_close(struct js_dev *jd)
+{
+	struct js_war_info *info = jd->port->info;
+	if (!--info->used) {
+		js_unregister_device(jd->port->devs[0]);
+		js_war_port = js_unregister_port(jd->port);
+	}
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_war_init_corr() initializes the correction values for the Warrior.
+ */
+
+static void __init js_war_init_corr(struct js_corr **corr)
+{
+	int i;
+
+	for (i = 0; i < 6; i++) {
+		corr[0][i].type = JS_CORR_BROKEN;
+		corr[0][i].prec = 0;
+		corr[0][i].coef[0] = -8;
+		corr[0][i].coef[1] = 8;
+		corr[0][i].coef[2] = (1 << 29) / (128 - 64);
+		corr[0][i].coef[3] = (1 << 29) / (128 - 64);
+	}
+
+	corr[0][2].coef[2] = (1 << 29) / (128 - 16);
+	corr[0][2].coef[3] = (1 << 29) / (128 - 16);
+
+	for (i = 3; i < 5; i++) {
+		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);
+	}
+
+	corr[0][5].prec = -1;
+	corr[0][5].coef[0] = 0;
+	corr[0][5].coef[1] = 0;
+	corr[0][5].coef[2] = (1 << 29) / 128;
+	corr[0][5].coef[3] = (1 << 29) / 128;
+}
+
+/*
+ * js_war_ldisc_open() is the routine that is called upon setting our line
+ * discipline on a tty.
+ */
+
+static int js_war_ldisc_open(struct tty_struct *tty)
+{
+	struct js_war_info iniinfo;
+	struct js_war_info *info = &iniinfo;
+
+	info->tty = tty;
+	info->idx = 0;
+	info->len = 0;
+	info->used = 1;
+
+	js_war_port = js_register_port(js_war_port, info, 1, sizeof(struct js_war_info), NULL);
+
+	info = js_war_port->info;
+	info->port = js_war_port;
+	tty->disc_data = info;
+
+	printk(KERN_INFO "js%d: WingMan Warrior on %s%d\n",
+		js_register_device(js_war_port, 0, 6, 4, "WingMan Warrior", js_war_open, js_war_close),
+		tty->driver.name, MINOR(tty->device) - tty->driver.minor_start);
+
+	js_war_init_corr(js_war_port->corr);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;
+}
+
+/*
+ * js_war_ldisc_close() is the opposite of js_war_ldisc_open()
+ */
+
+static void js_war_ldisc_close(struct tty_struct *tty)
+{
+	struct js_war_info* info = (struct js_war_info*) tty->disc_data;
+	if (!--info->used) {
+		js_unregister_device(info->port->devs[0]);
+		js_war_port = js_unregister_port(info->port);
+	}
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * js_war_ldisc_receive() is called by the low level driver when characters
+ * are ready for us. We then buffer them for further processing, or call the
+ * packet processing routine.
+ */
+
+static void js_war_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
+{
+	struct js_war_info* info = (struct js_war_info*) tty->disc_data;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		if (cp[i] & 0x80) {
+			if (info->idx)
+				js_war_process_packet(info);
+			info->idx = 0;
+			info->len = js_war_lengths[(cp[i] >> 4) & 7];
+		}
+
+		if (info->idx < JS_WAR_MAX_LENGTH)
+			info->data[info->idx++] = cp[i];
+
+		if (info->idx == info->len) {
+			if (info->idx)
+				js_war_process_packet(info);	
+			info->idx = 0;
+			info->len = 0;
+		}
+	}
+}
+
+/*
+ * js_war_ldisc_room() reports how much room we do have for receiving data.
+ * Although we in fact have infinite room, we need to specify some value
+ * here, so why not the size of our packet buffer. It's big anyway.
+ */
+
+static int js_war_ldisc_room(struct tty_struct *tty)
+{
+	return JS_WAR_MAX_LENGTH;
+}
+
+/*
+ * The line discipline structure.
+ */
+
+static struct tty_ldisc js_war_ldisc = {
+        magic:          TTY_LDISC_MAGIC,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+        name:           "warrior",
+#endif
+	open:		js_war_ldisc_open,
+	close:		js_war_ldisc_close,
+	receive_buf:	js_war_ldisc_receive,
+	receive_room:	js_war_ldisc_room,
+};
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init js_war_init(void)
+#endif
+{
+        if (tty_register_ldisc(N_JOYSTICK_WAR, &js_war_ldisc)) {
+                printk(KERN_ERR "joy-warrior: Error registering line discipline.\n");
+		return -ENODEV;
+	}
+
+	return  0;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	tty_register_ldisc(N_JOYSTICK_WAR, NULL);
+}
+#endif