patch-2.2.14 linux/drivers/char/joystick/joy-spaceorb.c

• Lines: 306
• Date: Tue Jan 4 10:12:14 2000
• Orig file: v2.2.13/linux/drivers/char/joystick/joy-spaceorb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.13/linux/drivers/char/joystick/joy-spaceorb.c linux/drivers/char/joystick/joy-spaceorb.c
@@ -0,0 +1,305 @@
+/*
+ *  joy-spaceorb.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 SpaceTec SpaceOrb 360 and SpaceBall Avenger 6dof controllers.
+ */
+
+/*
+ * 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_ORB		15
+#define JS_ORB_MAX_LENGTH	64
+
+/*
+ * List of SpaceOrbs.
+ */
+
+static struct js_port* js_orb_port = NULL;
+
+/*
+ * Per-Orb data.
+ */
+
+struct js_orb_info {
+	struct tty_struct* tty;
+	struct js_port* port;
+	int idx;
+	unsigned char data[JS_ORB_MAX_LENGTH];
+	int js;
+	char used;
+};
+
+static unsigned char js_orb_xor[] = "SpaceWare";
+
+static unsigned char *js_orb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
+		"Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" }; 
+
+/*
+ * js_orb_process_packet() decodes packets the driver receives from the
+ * SpaceOrb.
+ */
+
+static void js_orb_process_packet(struct js_orb_info* info)
+{
+	int i;
+	int **axes = info->port->axes;
+	int **buttons = info->port->buttons;
+	unsigned char *data = info->data;
+	unsigned char c = 0;
+
+	if (info->idx < 2) return;
+	for (i = 0; i < info->idx; i++) c ^= data[i];
+	if (c) return;
+
+	switch (info->data[0]) {
+
+		case 'R':				/* Reset packet */
+			info->data[info->idx - 1] = 0;
+			for (i = 1; i < info->idx && info->data[i] == ' '; i++);
+			printk(KERN_INFO "js%d: SpaceOrb 360 [%s] on %s%d\n",
+				info->js, info->data + i, info->tty->driver.name,
+				MINOR(info->tty->device) - info->tty->driver.minor_start);
+			break;
+
+		case 'D':				/* Ball + button data */
+			if (info->idx != 12) return;
+			if (!info->port->devs[0]) return;
+			for (i = 0; i < 9; i++) info->data[i+2] ^= js_orb_xor[i]; 
+			axes[0][0] = ( data[2]         << 3) | (data[ 3] >> 4);
+			axes[0][1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
+			axes[0][2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
+			axes[0][3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
+			axes[0][4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
+			axes[0][5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
+			for(i = 0; i < 6; i ++) if (axes[0][i] & 0x200) axes[0][i] -= 1024;
+			buttons[0][0] = data[1];
+			break;
+
+		case 'K':				/* Button data */
+			if (info->idx != 5) return;
+			if (!info->port->devs[0]) return;
+			buttons[0][0] = data[2];
+			break;
+
+		case 'E':				/* Error packet */
+			if (info->idx != 4) return;
+			printk(KERN_ERR "joy-spaceorb: Device error. [ ");
+			for (i = 0; i < 7; i++)
+				if (data[1] & (1 << i))
+					printk("%s ", js_orb_errors[i]);
+			printk("]\n");
+			break;
+
+		case 'N':				/* Null region */
+			if (info->idx != 3) return;
+			break;
+
+		case 'P':				/* Pulse (update) speed */
+			if (info->idx != 4) return;
+			break;
+
+		default:
+			printk("joy-spaceorb: Unknown packet %d length %d:", data[0], info->idx);
+			for (i = 0; i < info->idx; i++) printk(" %02x", data[i]);
+			printk("\n");
+			return;
+	}
+}
+
+/*
+ * js_orb_open() is a callback from the joystick device open routine.
+ */
+
+static int js_orb_open(struct js_dev *jd)
+{
+	struct js_orb_info *info = jd->port->info;
+	info->used++;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_orb_close() is a callback from the joystick device release routine.
+ */
+
+static int js_orb_close(struct js_dev *jd)
+{
+	struct js_orb_info *info = jd->port->info;
+	if (!--info->used) {
+		js_unregister_device(jd->port->devs[0]);
+		js_orb_port = js_unregister_port(jd->port);
+	}
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_orb_init_corr() initializes the correction values for the SpaceOrb.
+ */
+
+static void __init js_orb_init_corr(struct js_corr **corr)
+{
+	int j;
+
+	for (j = 0; 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] = (1 << 29) / 511;
+		corr[0][j].coef[3] = (1 << 29) / 511;
+	}
+}
+
+/*
+ * js_orb_ldisc_open() is the routine that is called upon setting our line
+ * discipline on a tty.
+ */
+
+static int js_orb_ldisc_open(struct tty_struct *tty)
+{
+	struct js_orb_info iniinfo;
+	struct js_orb_info *info = &iniinfo;
+
+	info->tty = tty;
+	info->idx = 0;
+	info->used = 1;
+
+	js_orb_port = js_register_port(js_orb_port, info, 1, sizeof(struct js_orb_info), NULL);
+	
+	info = js_orb_port->info;
+	info->port = js_orb_port;
+	tty->disc_data = info;
+
+	info->js = js_register_device(js_orb_port, 0, 6, 7, "SpaceOrb 360", js_orb_open, js_orb_close);
+
+	js_orb_init_corr(js_orb_port->corr);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;
+}
+
+/*
+ * js_orb_ldisc_close() is the opposite of js_orb_ldisc_open()
+ */
+
+static void js_orb_ldisc_close(struct tty_struct *tty)
+{
+	struct js_orb_info* info = (struct js_orb_info*) tty->disc_data;
+	if (!--info->used) {
+		js_unregister_device(info->port->devs[0]);
+		js_orb_port = js_unregister_port(info->port);
+	}
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * js_orb_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_orb_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
+{
+	struct js_orb_info* info = (struct js_orb_info*) tty->disc_data;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		if (~cp[i] & 0x80) {
+			if (info->idx) js_orb_process_packet(info);
+			info->idx = 0;
+		}
+		if (info->idx < JS_ORB_MAX_LENGTH)
+			info->data[info->idx++] = cp[i] & 0x7f;
+	}
+}
+
+/*
+ * js_orb_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_orb_ldisc_room(struct tty_struct *tty)
+{
+	return JS_ORB_MAX_LENGTH;
+}
+
+/*
+ * The line discipline structure.
+ */
+
+static struct tty_ldisc js_orb_ldisc = {
+	magic:		TTY_LDISC_MAGIC,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+	name:		"spaceorb",
+#endif
+	open:		js_orb_ldisc_open,
+	close:		js_orb_ldisc_close,
+	receive_buf:	js_orb_ldisc_receive,
+	receive_room:	js_orb_ldisc_room,
+};
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init js_orb_init(void)
+#endif
+{
+        if (tty_register_ldisc(N_JOYSTICK_ORB, &js_orb_ldisc)) {
+                printk(KERN_ERR "joy-spaceorb: Error registering line discipline.\n");
+		return -ENODEV;
+	}
+
+	return  0;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	tty_register_ldisc(N_JOYSTICK_ORB, NULL);
+}
+#endif