patch-2.4.0-test2 linux/drivers/char/joystick/lightning.c

• Lines: 301
• Date: Wed Jun 21 08:22:21 2000
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/lightning.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/lightning.c linux/drivers/char/joystick/lightning.c
@@ -0,0 +1,300 @@
+/*
+ * $Id: lightning.c,v 1.7 2000/05/24 19:36:03 vojtech Exp $
+ *
+ *  Copyright (c) 1998-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * PDPI Lightning 4 gamecard driver for Linux.
+ */
+
+/*
+ * 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 <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gameport.h>
+#include <linux/malloc.h>
+
+#define L4_PORT			0x201
+#define L4_SELECT_ANALOG	0xa4
+#define L4_SELECT_DIGITAL	0xa5
+#define L4_SELECT_SECONDARY	0xa6
+#define L4_CMD_ID		0x80
+#define L4_CMD_GETCAL		0x92
+#define L4_CMD_SETCAL		0x93
+#define L4_ID			0x04
+#define L4_BUSY			0x01
+#define L4_TIMEOUT		80	/* 80 us */
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
+
+struct l4 {
+	struct gameport gameport;
+	unsigned char port;
+} *l4_port[8];
+
+/*
+ * l4_wait_ready() waits for the L4 to become ready.
+ */
+
+static int l4_wait_ready(void)
+{
+	unsigned int t;
+	t = L4_TIMEOUT;
+	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
+	return -(t<=0);
+}
+
+/*
+ * l4_cooked_read() reads data from the Lightning 4.
+ */
+
+static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
+{
+	struct l4 *l4 = gameport->driver;
+	unsigned char status;
+	int i, result = -1;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
+
+	if (inb(L4_PORT) & L4_BUSY) goto fail;
+	outb(l4->port & 3, L4_PORT);
+
+	if (l4_wait_ready()) goto fail;
+	status = inb(L4_PORT);
+
+	for (i = 0; i < 4; i++)
+		if (status & (1 << i)) {
+			if (l4_wait_ready()) goto fail;
+			axes[i] = inb(L4_PORT);
+			if (axes[i] > 252) axes[i] = -1;
+		}
+
+	if (status & 0x10) {
+		if (l4_wait_ready()) goto fail;
+		*buttons = inb(L4_PORT) & 0x0f;
+	}
+
+	result = 0;
+
+fail:	outb(L4_SELECT_ANALOG, L4_PORT);	
+	return result;
+}
+
+static int l4_open(struct gameport *gameport, int mode)
+{
+	struct l4 *l4 = gameport->driver;
+        if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
+		return -1;
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	return 0;
+}
+
+/*
+ * l4_getcal() reads the L4 with calibration values.
+ */
+
+static int l4_getcal(int port, int *cal)
+{
+	int i, result = -1;
+	
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
+
+	if (inb(L4_PORT) & L4_BUSY) goto fail;
+	outb(L4_CMD_GETCAL, L4_PORT);
+
+	if (l4_wait_ready()) goto fail;
+	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail;
+
+	if (l4_wait_ready()) goto fail;
+        outb(port & 3, L4_PORT);
+
+	for (i = 0; i < 4; i++) {
+		if (l4_wait_ready()) goto fail;
+		cal[i] = inb(L4_PORT);
+	}
+
+	result = 0;
+
+fail:	outb(L4_SELECT_ANALOG, L4_PORT);
+	return result;
+}
+
+/*
+ * l4_setcal() programs the L4 with calibration values.
+ */
+
+static int l4_setcal(int port, int *cal)
+{
+	int i, result = -1;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
+
+	if (inb(L4_PORT) & L4_BUSY) goto fail;
+	outb(L4_CMD_SETCAL, L4_PORT);
+
+	if (l4_wait_ready()) goto fail;
+	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail;
+
+	if (l4_wait_ready()) goto fail;
+        outb(port & 3, L4_PORT);
+
+	for (i = 0; i < 4; i++) {
+		if (l4_wait_ready()) goto fail;
+		outb(cal[i], L4_PORT);
+	}
+
+	result = 0;
+
+fail:	outb(L4_SELECT_ANALOG, L4_PORT);
+	return result;
+}
+
+/*
+ * l4_calibrate() calibrates the L4 for the attached device, so
+ * that the device's resistance fits into the L4's 8-bit range.
+ */
+
+static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
+{
+	int i, t;
+	int cal[4];
+	struct l4 *l4 = gameport->driver;
+
+	if (l4_getcal(l4->port, cal))
+		return -1;
+
+	for (i = 0; i < 4; i++) {
+		t = (max[i] * cal[i]) / 200;
+		t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
+		axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
+		axes[i] = (axes[i] > 252) ? 252 : axes[i];
+		cal[i] = t;
+	}
+
+	if (l4_setcal(l4->port, cal))
+		return -1;
+
+	return 0;
+}
+	
+int __init l4_init(void)
+{
+	int cal[4] = {255,255,255,255};
+	int i, j, rev, cards = 0;
+	struct gameport *gameport;
+	struct l4 *l4;
+
+	if (!request_region(L4_PORT, 1, "lightning"))
+		return -1;
+
+	for (i = 0; i < 2; i++) {
+
+		outb(L4_SELECT_ANALOG, L4_PORT);
+		outb(L4_SELECT_DIGITAL + i, L4_PORT);
+
+		if (inb(L4_PORT) & L4_BUSY) continue;
+		outb(L4_CMD_ID, L4_PORT);
+
+		if (l4_wait_ready()) continue;
+		if (inb(L4_PORT) != L4_SELECT_DIGITAL + i) continue;
+
+		if (l4_wait_ready()) continue;
+		if (inb(L4_PORT) != L4_ID) continue;
+
+		if (l4_wait_ready()) continue;
+		rev = inb(L4_PORT);
+
+		if (!rev) continue;
+
+		if (!(l4_port[i * 4] = kmalloc(sizeof(struct l4) * 4, GFP_KERNEL))) {
+			printk(KERN_ERR "lightning: Out of memory allocating ports.\n");
+			continue;
+		}
+		memset(l4_port[i * 4], 0, sizeof(struct l4) * 4);
+
+		for (j = 0; j < 4; j++) {
+
+			l4 = l4_port[i * 4 + j] = l4_port[i * 4] + j;
+			l4->port = i * 4 + j;
+
+			gameport = &l4->gameport;
+			gameport->driver = l4;
+			gameport->open = l4_open;
+			gameport->cooked_read = l4_cooked_read;
+			gameport->calibrate = l4_calibrate;
+			gameport->type = GAMEPORT_EXT;
+
+			if (!i && !j) {
+				gameport->io = L4_PORT;
+				gameport->size = 1;
+			}
+
+			if (rev > 0x28)		/* on 2.9+ the setcal command works correctly */
+				l4_setcal(l4->port, cal);
+			
+			gameport_register_port(gameport);
+		}
+
+		printk(KERN_INFO "gameport%d,%d,%d,%d: PDPI Lightning 4 %s card v%d.%d at %#x\n",
+			l4_port[i * 4 + 0]->gameport.number, l4_port[i * 4 + 1]->gameport.number, 
+			l4_port[i * 4 + 2]->gameport.number, l4_port[i * 4 + 3]->gameport.number, 
+			i ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
+
+		cards++;
+	}
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+
+	if (!cards) {
+		release_region(L4_PORT, 1);
+		return -1;
+	}
+
+	return 0;
+}
+
+void __init l4_exit(void)
+{
+	int i;
+	int cal[4] = {59, 59, 59, 59};
+
+	for (i = 0; i < 8; i++)
+		if (l4_port[i]) {
+			l4_setcal(l4_port[i]->port, cal);
+			gameport_unregister_port(&l4_port[i]->gameport);
+		}
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	release_region(L4_PORT, 1);
+}
+
+module_init(l4_init);
+module_exit(l4_exit);