patch-2.4.0-test2 linux/drivers/char/joystick/joy-spaceball.c

• Lines: 346
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/joy-spaceball.c
• Orig date: Tue Apr 11 15:09:16 2000

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/joy-spaceball.c linux/drivers/char/joystick/joy-spaceball.c
@@ -1,345 +0,0 @@
-/*
- *  joy-spaceball.c  Version 0.1
- *
- *  Copyright (c) 1998 David Thompson
- *  Copyright (c) 1999 Vojtech Pavlik
- *  Copyright (c) 1999 Joseph Krahn
- *
- *  Sponsored by SuSE
- */
-
-/*
- * This is a module for the Linux joystick driver, supporting
- * the SpaceTec SpaceBall 4000 FLX.
- */
-
-/*
- * 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@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/tty.h>
-#include <linux/init.h>
-
-/*
- * Constants.
- */
-
-#define	N_JOYSTICK_SBALL	12
-#define JS_SBALL_MAX_LENGTH	128
-
-/*
- * List of SpaceBalls.
- */
-
-static struct js_port* js_sball_port = NULL;
-
-/*
- * Per-Ball data.
- */
-
-struct js_sball_info {
-	struct tty_struct* tty;
-	struct js_port* port;
-	int idx;
-	unsigned char data[JS_SBALL_MAX_LENGTH];
-	int js;
-	char used;
-};
-
-/*
- * js_sball_process_packet() decodes packets the driver receives from the
- * SpaceBall.
- */
-
-static void js_sball_process_packet(struct js_sball_info* info)
-{
-	int i,b;
-	int **axes = info->port->axes;
-	int **buttons = info->port->buttons;
-	unsigned char *data = info->data;
-
-	if (info->idx < 2) return;
-
-	switch (info->data[0]) {
-
-		case '@':					/* Reset packet */
-			info->data[info->idx - 1] = 0;
-			for (i = 1; i < info->idx && info->data[i] == ' '; i++);
-
-			printk(KERN_INFO "js%d: SpaceBall 4000FLX [%s] on %s%d\n",
-				info->js, info->data + i, info->tty->driver.name,
-				MINOR(info->tty->device) - info->tty->driver.minor_start);
-
-			memset(axes[0], 0, sizeof(int) * 6);	/* All axes, buttons should be zero */
-			buttons[0][0] = 0;
-			break;
-
-		case 'D':					/* Ball data */
-			if (info->idx != 16) return;
-			if (!info->port->devs[0]) return;
-			axes[0][0] = ((data[3] << 8) | data[4] );
-			axes[0][1] = ((data[5] << 8) | data[6] );
-			axes[0][2] = ((data[7] << 8) | data[8] );
-			axes[0][3] = ((data[9] << 8) | data[10]);
-			axes[0][4] = ((data[11]<< 8) | data[12]);
-			axes[0][5] = ((data[13]<< 8) | data[14]);
-			for(i = 0; i < 6; i ++) if (axes[0][i] & 0x8000) axes[0][i] -= 0x10000;
-			break;
-
-		case 'K':				/* Button data, part1 */
-			/* We can ignore this packet for the SB 4000FLX. */
-			break;
-
-		case '.':				/* Button data, part2 */
-			if (info->idx != 4) return;
-			if (!info->port->devs[0]) return;
-			b = (data[1] & 0xbf) << 8 | (data[2] & 0xbf);
-			buttons[0][0] = ((b & 0x1f80) >> 1 | (b & 0x3f));
-			break;
-
-		case '?':				/* Error packet */
-			info->data[info->idx - 1] = 0;
-			printk(KERN_ERR "joy-spaceball: Device error. [%s]\n",info->data+1);
-			break;
-
-		case 'A':				/* reply to A command (ID# report) */
-		case 'B':				/* reply to B command (beep) */
-		case 'H':				/* reply to H command (firmware report) */
-		case 'S':				/* reply to S command (single beep) */
-		case 'Y':				/* reply to Y command (scale flag) */
-		case '"':				/* reply to "n command (report info, part n) */
-			break;
-
-		case 'P':				/* Pulse (update) speed */
-			if (info->idx != 3) return;     /* data[2],data[3] = hex digits for speed 00-FF */
-			break;
-
-		default:
-			printk("joy-spaceball: Unknown packet %d length %d:", data[0], info->idx);
-			for (i = 0; i < info->idx; i++) printk(" %02x", data[i]);
-			printk("\n");
-			return;
-	}
-}
-
-/*
- * js_sball_open() is a callback from the joystick device open routine.
- */
-
-static int js_sball_open(struct js_dev *jd)
-{
-	struct js_sball_info *info = jd->port->info;
-	info->used++;
-	MOD_INC_USE_COUNT;
-	return 0;
-}
-
-/*
- * js_sball_close() is a callback from the joystick device release routine.
- */
-
-static int js_sball_close(struct js_dev *jd)
-{
-	struct js_sball_info *info = jd->port->info;
-	if (!--info->used) {
-		js_unregister_device(jd->port->devs[0]);
-		js_sball_port = js_unregister_port(jd->port);
-	}
-	MOD_DEC_USE_COUNT;
-	return 0;
-}
-
-/*
- * js_sball_init_corr() initializes the correction values for the SpaceBall.
- */
-
-static void __init js_sball_init_corr(struct js_corr **corr)
-{
-	int j;
-
-	for (j = 0; j < 3; j++) {
-		corr[0][j].type = JS_CORR_BROKEN;
-		corr[0][j].prec = 0;
-		corr[0][j].coef[0] = 0;
-		corr[0][j].coef[1] = 0;
-		corr[0][j].coef[2] = 50000;
-		corr[0][j].coef[3] = 50000;
-	}
-	for (j = 3; j < 6; j++) {
-		corr[0][j].type = JS_CORR_BROKEN;
-		corr[0][j].prec = 0;
-		corr[0][j].coef[0] = 0;
-		corr[0][j].coef[1] = 0;
-		corr[0][j].coef[2] = 300000;
-		corr[0][j].coef[3] = 300000;
-	}
-}
-
-/*
- * js_sball_ldisc_open() is the routine that is called upon setting our line
- * discipline on a tty.
- */
-
-static int js_sball_ldisc_open(struct tty_struct *tty)
-{
-	struct js_sball_info iniinfo;
-	struct js_sball_info *info = &iniinfo;
-
-	MOD_INC_USE_COUNT;
-
-	info->tty = tty;
-	info->idx = 0;
-	info->used = 1;
-
-	js_sball_port = js_register_port(js_sball_port, info, 1, sizeof(struct js_sball_info), NULL);
-	
-	info = js_sball_port->info;
-	info->port = js_sball_port;
-	tty->disc_data = info;
-
-	info->js = js_register_device(js_sball_port, 0, 6, 12, "SpaceBall 4000 FLX", js_sball_open, js_sball_close);
-
-	js_sball_init_corr(js_sball_port->corr);
-
-	return 0;
-}
-
-/*
- * js_sball_ldisc_close() is the opposite of js_sball_ldisc_open()
- */
-
-static void js_sball_ldisc_close(struct tty_struct *tty)
-{
-	struct js_sball_info* info = (struct js_sball_info*) tty->disc_data;
-	if (!--info->used) {
-		js_unregister_device(info->port->devs[0]);
-		js_sball_port = js_unregister_port(info->port);
-	}
-	MOD_DEC_USE_COUNT;
-}
-
-/*
- * js_sball_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_sball_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
-{
-	struct js_sball_info* info = (struct js_sball_info*) tty->disc_data;
-	int i;
-	int esc_flag = 0;
-
-/*
- * Spaceball 4000 FLX packets all start with a one letter packet-type decriptor,
- * and end in 0x0d.  It uses '^' as an escape for 0x0d characters which can
- * occur in the axis values.  ^M, ^Q and ^S all mean 0x0d, depending (I think)
- * on whether the axis value is increasing, decreasing, or same as before.
- * (I don't see why this is useful).
- *
- * There may be a nicer whay to handle the escapes, but I wanted to be sure to
- * allow for an escape at the end of the buffer.
- */
-	for (i = 0; i < count; i++) {
-		if (esc_flag) {	 /* If the last char was an escape, overwrite it with the escaped value */
-
-			switch (cp[i]){
-				case 'M':
-                        	case 'Q':
-                        	case 'S':
-                                	info->data[info->idx]=0x0d;
-                                	break;
-                        	case '^': /* escaped escape; leave as is */
-                                	break;
-                        	default:
-					printk("joy-spaceball: Unknown escape character: %02x\n", cp[i]);
-			}
-
-			esc_flag = 0;
-
-		} else {
-
-			if (info->idx < JS_SBALL_MAX_LENGTH)
-				info->data[info->idx++] = cp[i];
-
-			if (cp[i] == 0x0D) {
-				if (info->idx)
-					js_sball_process_packet(info);
-				info->idx = 0;
-			} else
-				if (cp[i] == '^') esc_flag = 1;
-
-		}
-	}
-}
-
-/*
- * js_sball_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_sball_ldisc_room(struct tty_struct *tty)
-{
-	return JS_SBALL_MAX_LENGTH;
-}
-
-/*
- * The line discipline structure.
- */
-
-static struct tty_ldisc js_sball_ldisc = {
-	magic:		TTY_LDISC_MAGIC,
-	name:		"spaceball",
-	open:		js_sball_ldisc_open,
-	close:		js_sball_ldisc_close,
-	receive_buf:	js_sball_ldisc_receive,
-	receive_room:	js_sball_ldisc_room,
-};
-
-/*
- * The functions for inserting/removing us as a module.
- */
-
-#ifdef MODULE
-int init_module(void)
-#else
-int __init js_sball_init(void)
-#endif
-{
-        if (tty_register_ldisc(N_JOYSTICK_SBALL, &js_sball_ldisc)) {
-                printk(KERN_ERR "joy-spaceball: Error registering line discipline.\n");
-		return -ENODEV;
-	}
-
-	return  0;
-}
-
-#ifdef MODULE
-void cleanup_module(void)
-{
-	tty_register_ldisc(N_JOYSTICK_SBALL, NULL);
-}
-#endif