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

• Lines: 288
• Date: Tue Dec 7 10:13:11 1999
• Orig file: v2.3.30/linux/drivers/char/joystick/joy-creative.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.30/linux/drivers/char/joystick/joy-creative.c linux/drivers/char/joystick/joy-creative.c
@@ -0,0 +1,287 @@
+/*
+ *  joy-creative.c  Version 1.2
+ *
+ *  Copyright (c) 1999 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * This is a module for the Linux joystick driver, supporting
+ * Creative Labs Blaster gamepad family.
+ */
+
+/*
+ * 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/ioport.h>
+#include <linux/joystick.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/init.h>
+
+#define JS_CR_MAX_STROBE	100	/* 100 us max wait for first strobe */
+#define JS_CR_LENGTH		36
+
+#define JS_CR_MODE_BGPC		8
+
+static int js_cr_port_list[] __initdata = {0x201, 0};
+static struct js_port* js_cr_port __initdata = NULL;
+
+struct js_cr_info {
+	int io;
+	unsigned char mode[2];
+};
+
+/*
+ * js_cr_read_packet() reads a Blaster gamepad packet.
+ */
+
+static int js_cr_read_packet(int io, unsigned int *data)
+{
+	unsigned long flags;
+	unsigned char u, v, w;
+	__u64 buf[2];
+	int r[2], t[2], p[2];
+	int i, j, ret;
+
+	for (i = 0; i < 2; i++); {
+		r[i] = buf[i] = 0;
+		p[i] = t[i] = JS_CR_MAX_STROBE;
+		p[i] += JS_CR_MAX_STROBE;
+	}
+	
+	__save_flags(flags);
+	__cli();
+
+	u = inb(io);
+
+	do {
+		t[0]--; t[1]--;
+		v = inb(io);
+		for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
+			if (w & 0x30) {
+				if ((w & 0x30) < 0x30 && r[i] < JS_CR_LENGTH && t[i] > 0) {
+					buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
+					p[i] = t[i] = (p[i] - t[i]) << 1;
+					u = v;
+				} else t[i] = 0;
+			}
+	} while (t[0] > 0 || t[1] > 0);
+
+	__restore_flags(flags);
+
+
+	ret = 0;
+
+	for (i = 0; i < 2; i++) {
+
+		if (r[i] != JS_CR_LENGTH) continue;
+
+		for (j = 0; j < JS_CR_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
+			buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (JS_CR_LENGTH - 1));
+
+		if (j < JS_CR_LENGTH) ret |= (1 << i);
+
+		data[i] = ((buf[i] >>  7) & 0x000001f) | ((buf[i] >>  8) & 0x00003e0)
+			| ((buf[i] >>  9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
+			| ((buf[i] >> 11) & 0x1f00000);
+
+	}
+
+	return ret;
+}
+
+/*
+ * js_cr_read() reads and analyzes Blaster gamepad data.
+ */
+
+static int js_cr_read(void *xinfo, int **axes, int **buttons)
+{
+	struct js_cr_info *info = xinfo;
+	unsigned int data[2];
+	int i, r;
+
+	if (!(r = js_cr_read_packet(info->io, data)))
+		return -1;
+
+	for (i = 0; i < 2; i++)
+		if (r & (1 << i)) {
+			switch (info->mode[i]) {
+
+				case JS_CR_MODE_BGPC:
+
+					axes[i][0] = ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1);
+					axes[i][1] = ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1);
+
+					buttons[i][0] = ((data[i] >> 12) & 0x007) | ((data[i] >> 6) & 0x038)
+						      | ((data[i] >>  1) & 0x0c0) | ((data[i] >> 7) & 0x300)
+						      | ((data[i] <<  5) & 0xc00);
+
+					break;
+
+				default:
+					break;
+
+			}
+		}
+
+	return 0;
+}
+
+/*
+ * js_cr_open() is a callback from the file open routine.
+ */
+
+static int js_cr_open(struct js_dev *jd)
+{
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_cr_close() is a callback from the file release routine.
+ */
+
+static int js_cr_close(struct js_dev *jd)
+{
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * js_cr_init_corr() initializes correction values of
+ * Blaster gamepads.
+ */
+
+static void __init js_cr_init_corr(int mode, struct js_corr *corr)
+{
+	int i;
+
+	switch (mode) {
+
+		case JS_CR_MODE_BGPC:
+
+			for (i = 0; i < 2; i++) {
+				corr[i].type = JS_CORR_BROKEN;
+				corr[i].prec = 0;
+				corr[i].coef[0] = 0;
+				corr[i].coef[1] = 0;
+				corr[i].coef[2] = (1 << 29);
+				corr[i].coef[3] = (1 << 29);
+			}
+
+			break;
+
+	}
+}
+
+/*
+ * js_cr_probe() probes for Blaster gamepads.
+ */
+
+static struct js_port __init *js_cr_probe(int io, struct js_port *port)
+{
+	struct js_cr_info info;
+	char *names[] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "Blaster GamePad Cobra" };
+	char axes[] = { 0, 0, 0, 0, 0, 0, 0, 0, 2 };
+	char buttons[] = { 0, 0, 0, 0, 0, 0, 0, 0, 12 };
+	unsigned int data[2];
+	int i, r;
+
+	if (check_region(io, 1)) return port;
+
+	info.mode[0] = info.mode[1] = 0;
+
+	if (!(r = js_cr_read_packet(io, data)))
+		return port;
+
+	for (i = 0; i < 2; i++) {
+		if (r & (1 << i)) {
+			if (~data[i] & 1) {
+				info.mode[i] = JS_CR_MODE_BGPC;
+			} else {
+				info.mode[i] = (data[i] >> 2) & 7;
+			}
+			if (!names[info.mode[i]]) {
+				printk(KERN_WARNING "joy-creative: Unknown Creative device %d at %#x\n",
+					info.mode[i], io);
+				info.mode[i] = 0;
+			}
+		}
+	}
+
+	if (!info.mode[0] && !info.mode[1]) return port;
+
+	info.io = io;
+
+	request_region(io, 1, "joystick (creative)");
+	port = js_register_port(port, &info, 2, sizeof(struct js_cr_info), js_cr_read);
+
+	for (i = 0; i < 2; i++)
+		if (info.mode[i]) {
+			printk(KERN_INFO "js%d: %s at %#x\n",
+				js_register_device(port, i, axes[info.mode[i]], buttons[info.mode[i]],
+					names[info.mode[i]], js_cr_open, js_cr_close),
+				names[info.mode[i]], io);
+			js_cr_init_corr(info.mode[i], port->corr[i]);
+		}
+
+	return port;
+}
+
+#ifdef MODULE
+int init_module(void)
+#else
+int __init js_cr_init(void)
+#endif
+{
+	int *p;
+
+	for (p = js_cr_port_list; *p; p++) js_cr_port = js_cr_probe(*p, js_cr_port);
+	if (js_cr_port) return 0;
+
+#ifdef MODULE
+	printk(KERN_WARNING "joy-creative: no joysticks found\n");
+#endif
+
+	return -ENODEV;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	int i;
+	struct js_cr_info *info;
+
+	while (js_cr_port) {
+		for (i = 0; i < js_cr_port->ndevs; i++)
+			if (js_cr_port->devs[i])
+				js_unregister_device(js_cr_port->devs[i]);
+		info = js_cr_port->info;
+		release_region(info->io, 1);
+		js_cr_port = js_unregister_port(js_cr_port);
+	}
+}
+#endif