X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finput%2Fjoystick%2Fgamecon.c;h=fe12aa37393d9560c080f823182cd21b93339f8b;hb=refs%2Fheads%2Fvserver;hp=02ee05a98c50f6731d5467688f1711ff7037edb5;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c
index 02ee05a98..fe12aa373 100644
--- a/drivers/input/joystick/gamecon.c
+++ b/drivers/input/joystick/gamecon.c
@@ -1,28 +1,26 @@
 /*
- * $Id: gamecon.c,v 1.22 2002/07/01 15:42:25 vojtech Exp $
+ * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
  *
- *  Copyright (c) 1999-2001 Vojtech Pavlik
+ *  Copyright (c) 1999-2004	Vojtech Pavlik <vojtech@suse.cz>
+ *  Copyright (c) 2004		Peter Nelson <rufus-kernel@hackish.org>
  *
  *  Based on the work of:
- *  	Andree Borrmann		John Dahlstrom
- *  	David Kuder		Nathan Hand
- */
-
-/*
- * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
+ *	Andree Borrmann		John Dahlstrom
+ *	David Kuder		Nathan Hand
+ *	Raphael Assenat
  */
 
 /*
  * 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 
+ * 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
@@ -39,25 +37,28 @@
 #include <linux/init.h>
 #include <linux/parport.h>
 #include <linux/input.h>
+#include <linux/mutex.h>
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
 MODULE_LICENSE("GPL");
 
-static int gc[] __initdata = { -1, 0, 0, 0, 0, 0 };
-static int gc_nargs __initdata = 0;
-module_param_array_named(map, gc, int, gc_nargs, 0);
-MODULE_PARM_DESC(map, "Describers first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
+#define GC_MAX_PORTS		3
+#define GC_MAX_DEVICES		5
 
-static int gc_2[] __initdata = { -1, 0, 0, 0, 0, 0 };
-static int gc_nargs_2 __initdata = 0;
-module_param_array_named(map2, gc_2, int, gc_nargs_2, 0);
-MODULE_PARM_DESC(map2, "Describers second set of devices");
+struct gc_config {
+	int args[GC_MAX_DEVICES + 1];
+	int nargs;
+};
+
+static struct gc_config gc[GC_MAX_PORTS] __initdata;
 
-static int gc_3[] __initdata = { -1, 0, 0, 0, 0, 0 };
-static int gc_nargs_3 __initdata = 0;
-module_param_array_named(map3, gc_3, int, gc_nargs_3, 0);
-MODULE_PARM_DESC(map3, "Describers third set of devices");
+module_param_array_named(map, gc[0].args, int, &gc[0].nargs, 0);
+MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
+module_param_array_named(map2, gc[1].args, int, &gc[1].nargs, 0);
+MODULE_PARM_DESC(map2, "Describes second set of devices");
+module_param_array_named(map3, gc[2].args, int, &gc[2].nargs, 0);
+MODULE_PARM_DESC(map3, "Describes third set of devices");
 
 __obsolete_setup("gc=");
 __obsolete_setup("gc_2=");
@@ -70,20 +71,23 @@ __obsolete_setup("gc_3=");
 #define GC_NES4		3
 #define GC_MULTI	4
 #define GC_MULTI2	5
-#define GC_N64		6	
+#define GC_N64		6
 #define GC_PSX		7
+#define GC_DDR		8
+#define GC_SNESMOUSE	9
 
-#define GC_MAX		7
+#define GC_MAX		9
 
 #define GC_REFRESH_TIME	HZ/100
- 
+
 struct gc {
 	struct pardevice *pd;
-	struct input_dev dev[5];
+	struct input_dev *dev[GC_MAX_DEVICES];
 	struct timer_list timer;
 	unsigned char pads[GC_MAX + 1];
 	int used;
-	char phys[5][32];
+	struct mutex mutex;
+	char phys[GC_MAX_DEVICES][32];
 };
 
 static struct gc *gc_base[3];
@@ -91,7 +95,8 @@ static struct gc *gc_base[3];
 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
 
 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
-				"Multisystem 2-button joystick", "N64 controller", "PSX controller" };
+				"Multisystem 2-button joystick", "N64 controller", "PSX controller",
+				"PSX DDR controller", "SNES mouse" };
 /*
  * N64 support.
  */
@@ -104,7 +109,7 @@ static short gc_n64_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL,
 #define GC_N64_DELAY		133		/* delay between transmit request, and response ready (us) */
 #define GC_N64_REQUEST		0x1dd1111111ULL /* the request data command (encoded for 000000011) */
 #define GC_N64_DWS		3		/* delay between write segments (required for sound playback because of ISA DMA) */
-						/* GC_N64_DWS > 24 is known to fail */ 
+						/* GC_N64_DWS > 24 is known to fail */
 #define GC_N64_POWER_W		0xe2		/* power during write (transmit request) */
 #define GC_N64_POWER_R		0xfd		/* power during read */
 #define GC_N64_OUT		0x1d		/* output bits to the 4 pads */
@@ -113,8 +118,8 @@ static short gc_n64_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL,
 						/* than 123 us */
 #define GC_N64_CLOCK		0x02		/* clock bits for read */
 
-/* 
- * gc_n64_read_packet() reads an N64 packet. 
+/*
+ * gc_n64_read_packet() reads an N64 packet.
  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
  */
 
@@ -157,13 +162,58 @@ static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 
 }
 
+static void gc_n64_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_N64_LENGTH];
+	signed char axes[2];
+	struct input_dev *dev;
+	int i, j, s;
+
+	gc_n64_read_packet(gc, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+
+		dev = gc->dev[i];
+		if (!dev)
+			continue;
+
+		s = gc_status_bit[i];
+
+		if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
+
+			axes[0] = axes[1] = 0;
+
+			for (j = 0; j < 8; j++) {
+				if (data[23 - j] & s)
+					axes[0] |= 1 << j;
+				if (data[31 - j] & s)
+					axes[1] |= 1 << j;
+			}
+
+			input_report_abs(dev, ABS_X,  axes[0]);
+			input_report_abs(dev, ABS_Y, -axes[1]);
+
+			input_report_abs(dev, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
+			input_report_abs(dev, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
+
+			for (j = 0; j < 10; j++)
+				input_report_key(dev, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
+
+			input_sync(dev);
+		}
+	}
+}
+
 /*
  * NES/SNES support.
  */
 
-#define GC_NES_DELAY	6	/* Delay between bits - 6us */
-#define GC_NES_LENGTH	8	/* The NES pads use 8 bits of data */
-#define GC_SNES_LENGTH	12	/* The SNES true length is 16, but the last 4 bits are unused */
+#define GC_NES_DELAY		6	/* Delay between bits - 6us */
+#define GC_NES_LENGTH		8	/* The NES pads use 8 bits of data */
+#define GC_SNES_LENGTH		12	/* The SNES true length is 16, but the
+					   last 4 bits are unused */
+#define GC_SNESMOUSE_LENGTH	32	/* The SNES mouse uses 32 bits, the first
+					   16 bits are equivalent to a gamepad */
 
 #define GC_NES_POWER	0xfc
 #define GC_NES_CLOCK	0x01
@@ -196,6 +246,81 @@ static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 	}
 }
 
+static void gc_nes_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_SNESMOUSE_LENGTH];
+	struct input_dev *dev;
+	int i, j, s, len;
+	char x_rel, y_rel;
+
+	len = gc->pads[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
+			(gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
+
+	gc_nes_read_packet(gc, len, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+
+		dev = gc->dev[i];
+		if (!dev)
+			continue;
+
+		s = gc_status_bit[i];
+
+		if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
+			input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
+			input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
+		}
+
+		if (s & gc->pads[GC_NES])
+			for (j = 0; j < 4; j++)
+				input_report_key(dev, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
+
+		if (s & gc->pads[GC_SNES])
+			for (j = 0; j < 8; j++)
+				input_report_key(dev, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
+
+		if (s & gc->pads[GC_SNESMOUSE]) {
+			/*
+			 * The 4 unused bits from SNES controllers appear to be ID bits
+			 * so use them to make sure iwe are dealing with a mouse.
+			 * gamepad is connected. This is important since
+			 * my SNES gamepad sends 1's for bits 16-31, which
+			 * cause the mouse pointer to quickly move to the
+			 * upper left corner of the screen.
+			 */
+			if (!(s & data[12]) && !(s & data[13]) &&
+			    !(s & data[14]) && (s & data[15])) {
+				input_report_key(dev, BTN_LEFT, s & data[9]);
+				input_report_key(dev, BTN_RIGHT, s & data[8]);
+
+				x_rel = y_rel = 0;
+				for (j = 0; j < 7; j++) {
+					x_rel <<= 1;
+					if (data[25 + j] & s)
+						x_rel |= 1;
+
+					y_rel <<= 1;
+					if (data[17 + j] & s)
+						y_rel |= 1;
+				}
+
+				if (x_rel) {
+					if (data[24] & s)
+						x_rel = -x_rel;
+					input_report_rel(dev, REL_X, x_rel);
+				}
+
+				if (y_rel) {
+					if (data[16] & s)
+						y_rel = -y_rel;
+					input_report_rel(dev, REL_Y, y_rel);
+				}
+			}
+		}
+		input_sync(dev);
+	}
+}
+
 /*
  * Multisystem joystick support
  */
@@ -217,6 +342,35 @@ static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 	}
 }
 
+static void gc_multi_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_MULTI2_LENGTH];
+	struct input_dev *dev;
+	int i, s;
+
+	gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+
+		dev = gc->dev[i];
+		if (!dev)
+			continue;
+
+		s = gc_status_bit[i];
+
+		if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
+			input_report_abs(dev, ABS_X,  !(s & data[2]) - !(s & data[3]));
+			input_report_abs(dev, ABS_Y,  !(s & data[0]) - !(s & data[1]));
+			input_report_key(dev, BTN_TRIGGER, s & data[4]);
+		}
+
+		if (s & gc->pads[GC_MULTI2])
+			input_report_key(dev, BTN_THUMB, s & data[5]);
+
+		input_sync(dev);
+	}
+}
+
 /*
  * PSX support
  *
@@ -224,11 +378,12 @@ static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
  *	http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
  *	http://www.gamesx.com/controldata/psxcont/psxcont.htm
  *	ftp://milano.usal.es/pablo/
- *	
+ *
  */
 
 #define GC_PSX_DELAY	25		/* 25 usec */
-#define GC_PSX_LENGTH	8		/* talk to the controller in bytes */
+#define GC_PSX_LENGTH	8		/* talk to the controller in bits */
+#define GC_PSX_BYTES	6		/* the maximum number of bytes to read off the controller */
 
 #define GC_PSX_MOUSE	1		/* Mouse */
 #define GC_PSX_NEGCON	2		/* NegCon */
@@ -237,12 +392,12 @@ static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 #define GC_PSX_RUMBLE	7		/* Rumble in Red mode */
 
 #define GC_PSX_CLOCK	0x04		/* Pin 4 */
-#define GC_PSX_COMMAND	0x01		/* Pin 1 */
+#define GC_PSX_COMMAND	0x01		/* Pin 2 */
 #define GC_PSX_POWER	0xf8		/* Pins 5-9 */
 #define GC_PSX_SELECT	0x02		/* Pin 3 */
 
 #define GC_PSX_ID(x)	((x) >> 4)	/* High nibble is device type */
-#define GC_PSX_LEN(x)	((x) & 0xf)	/* Low nibble is length in words */
+#define GC_PSX_LEN(x)	(((x) & 0xf) << 1)	/* Low nibble is length in bytes/2 */
 
 static int gc_psx_delay = GC_PSX_DELAY;
 module_param_named(psx_delay, gc_psx_delay, uint, 0);
@@ -253,25 +408,30 @@ __obsolete_setup("gc_psx_delay=");
 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 				BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
+static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 
 /*
  * gc_psx_command() writes 8bit command and reads 8bit data from
  * the psx pad.
  */
 
-static int gc_psx_command(struct gc *gc, int b)
+static void gc_psx_command(struct gc *gc, int b, unsigned char data[GC_MAX_DEVICES])
 {
-	int i, cmd, data = 0;
+	int i, j, cmd, read;
+
+	for (i = 0; i < GC_MAX_DEVICES; i++)
+		data[i] = 0;
 
-	for (i = 0; i < 8; i++, b >>= 1) {
+	for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 		cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 		parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
 		udelay(gc_psx_delay);
-		data |= ((parport_read_status(gc->pd->port) ^ 0x80) & gc->pads[GC_PSX]) ? (1 << i) : 0;
+		read = parport_read_status(gc->pd->port) ^ 0x80;
+		for (j = 0; j < GC_MAX_DEVICES; j++)
+			data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
 		parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 		udelay(gc_psx_delay);
 	}
-	return data;
 }
 
 /*
@@ -279,188 +439,158 @@ static int gc_psx_command(struct gc *gc, int b)
  * device identifier code.
  */
 
-static int gc_psx_read_packet(struct gc *gc, unsigned char *data)
+static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
+			       unsigned char id[GC_MAX_DEVICES])
 {
-	int i, id;
+	int i, j, max_len = 0;
 	unsigned long flags;
+	unsigned char data2[GC_MAX_DEVICES];
 
 	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);	/* Select pad */
-	udelay(gc_psx_delay * 2);
+	udelay(gc_psx_delay);
 	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);			/* Deselect, begin command */
-	udelay(gc_psx_delay * 2);
+	udelay(gc_psx_delay);
 
 	local_irq_save(flags);
 
-	gc_psx_command(gc, 0x01);							/* Access pad */
-	id = gc_psx_command(gc, 0x42);							/* Get device id */
-	if (gc_psx_command(gc, 0) == 0x5a) {						/* Okay? */
-		for (i = 0; i < GC_PSX_LEN(id) * 2; i++)
-			data[i] = gc_psx_command(gc, 0);
-	} else id = 0;
+	gc_psx_command(gc, 0x01, data2);						/* Access pad */
+	gc_psx_command(gc, 0x42, id);							/* Get device ids */
+	gc_psx_command(gc, 0, data2);							/* Dump status */
+
+	for (i =0; i < GC_MAX_DEVICES; i++)								/* Find the longest pad */
+		if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
+			&& (GC_PSX_LEN(id[i]) > max_len)
+			&& (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
+			max_len = GC_PSX_LEN(id[i]);
+
+	for (i = 0; i < max_len; i++) {						/* Read in all the data */
+		gc_psx_command(gc, 0, data2);
+		for (j = 0; j < GC_MAX_DEVICES; j++)
+			data[j][i] = data2[j];
+	}
 
 	local_irq_restore(flags);
 
 	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 
-	return GC_PSX_ID(id);
+	for(i = 0; i < GC_MAX_DEVICES; i++)								/* Set id's to the real value */
+		id[i] = GC_PSX_ID(id[i]);
 }
 
-/*
- * gc_timer() reads and analyzes console pads data.
- */
-
-#define GC_MAX_LENGTH GC_N64_LENGTH
-
-static void gc_timer(unsigned long private)
+static void gc_psx_process_packet(struct gc *gc)
 {
-	struct gc *gc = (void *) private;
-	struct input_dev *dev = gc->dev;
-	unsigned char data[GC_MAX_LENGTH];
-	int i, j, s;
-
-/*
- * N64 pads - must be read first, any read confuses them for 200 us
- */
+	unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
+	unsigned char id[GC_MAX_DEVICES];
+	struct input_dev *dev;
+	int i, j;
 
-	if (gc->pads[GC_N64]) {
+	gc_psx_read_packet(gc, data, id);
 
-		gc_n64_read_packet(gc, data);
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
 
-		for (i = 0; i < 5; i++) {
+		dev = gc->dev[i];
+		if (!dev)
+			continue;
 
-			s = gc_status_bit[i];
+		switch (id[i]) {
 
-			if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
-	
-				signed char axes[2];
-				axes[0] = axes[1] = 0;
+			case GC_PSX_RUMBLE:
 
-				for (j = 0; j < 8; j++) {
-					if (data[23 - j] & s) axes[0] |= 1 << j; 
-					if (data[31 - j] & s) axes[1] |= 1 << j; 
-				}
+				input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
+				input_report_key(dev, BTN_THUMBR, ~data[i][0] & 0x02);
 
-				input_report_abs(dev + i, ABS_X,  axes[0]);
-				input_report_abs(dev + i, ABS_Y, -axes[1]);
+			case GC_PSX_NEGCON:
+			case GC_PSX_ANALOG:
 
-				input_report_abs(dev + i, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
-				input_report_abs(dev + i, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
+				if (gc->pads[GC_DDR] & gc_status_bit[i]) {
+					for(j = 0; j < 4; j++)
+						input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
+				} else {
+					for (j = 0; j < 4; j++)
+						input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);
 
-				for (j = 0; j < 10; j++)
-					input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
+					input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
+					input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
+				}
 
-				input_sync(dev + i);
-			}
-		}
-	}
+				for (j = 0; j < 8; j++)
+					input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 
-/*
- * NES and SNES pads
- */
+				input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
+				input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 
-	if (gc->pads[GC_NES] || gc->pads[GC_SNES]) {
+				input_sync(dev);
 
-		gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);
+				break;
 
-		for (i = 0; i < 5; i++) {
+			case GC_PSX_NORMAL:
+				if (gc->pads[GC_DDR] & gc_status_bit[i]) {
+					for(j = 0; j < 4; j++)
+						input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
+				} else {
+					input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
+					input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
+
+					/* for some reason if the extra axes are left unset they drift */
+					/* for (j = 0; j < 4; j++)
+						input_report_abs(dev, gc_psx_abs[j + 2], 128);
+					 * This needs to be debugged properly,
+					 * maybe fuzz processing needs to be done in input_sync()
+					 *				 --vojtech
+					 */
+				}
 
-			s = gc_status_bit[i];
+				for (j = 0; j < 8; j++)
+					input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 
-			if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
-				input_report_abs(dev + i, ABS_X, !(s & data[6]) - !(s & data[7]));
-				input_report_abs(dev + i, ABS_Y, !(s & data[4]) - !(s & data[5]));
-			}
+				input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
+				input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 
-			if (s & gc->pads[GC_NES])
-				for (j = 0; j < 4; j++)
-					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
+				input_sync(dev);
 
-			if (s & gc->pads[GC_SNES])
-				for (j = 0; j < 8; j++)
-					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
+				break;
 
-			input_sync(dev + i);
+			case 0: /* not a pad, ignore */
+				break;
 		}
 	}
+}
 
 /*
- * Multi and Multi2 joysticks
+ * gc_timer() initiates reads of console pads data.
  */
 
-	if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2]) {
+static void gc_timer(unsigned long private)
+{
+	struct gc *gc = (void *) private;
 
-		gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
+/*
+ * N64 pads - must be read first, any read confuses them for 200 us
+ */
 
-		for (i = 0; i < 5; i++) {
+	if (gc->pads[GC_N64])
+		gc_n64_process_packet(gc);
 
-			s = gc_status_bit[i];
+/*
+ * NES and SNES pads or mouse
+ */
 
-			if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
-				input_report_abs(dev + i, ABS_X,  !(s & data[2]) - !(s & data[3]));
-				input_report_abs(dev + i, ABS_Y,  !(s & data[0]) - !(s & data[1]));
-				input_report_key(dev + i, BTN_TRIGGER, s & data[4]);
-			}
+	if (gc->pads[GC_NES] || gc->pads[GC_SNES] || gc->pads[GC_SNESMOUSE])
+		gc_nes_process_packet(gc);
 
-			if (s & gc->pads[GC_MULTI2])
-				input_report_key(dev + i, BTN_THUMB, s & data[5]);
+/*
+ * Multi and Multi2 joysticks
+ */
 
-			input_sync(dev + i);
-		}
-	}
+	if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
+		gc_multi_process_packet(gc);
 
 /*
  * PSX controllers
  */
 
-	if (gc->pads[GC_PSX]) {
-
-		for (i = 0; i < 5; i++)
-	       		if (gc->pads[GC_PSX] & gc_status_bit[i])
-				break;
-
- 		switch (gc_psx_read_packet(gc, data)) {
-
-			case GC_PSX_RUMBLE:
-
-				input_report_key(dev + i, BTN_THUMBL, ~data[0] & 0x04);
-				input_report_key(dev + i, BTN_THUMBR, ~data[0] & 0x02);
-				input_sync(dev + i);
-
-			case GC_PSX_NEGCON:
-			case GC_PSX_ANALOG:
-
-				for (j = 0; j < 4; j++)
-					input_report_abs(dev + i, gc_psx_abs[j], data[j + 2]);
-
-				input_report_abs(dev + i, ABS_HAT0X, !(data[0] & 0x20) - !(data[0] & 0x80));
-				input_report_abs(dev + i, ABS_HAT0Y, !(data[0] & 0x40) - !(data[0] & 0x10));
-
-				for (j = 0; j < 8; j++)
-					input_report_key(dev + i, gc_psx_btn[j], ~data[1] & (1 << j));
-
-				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
-				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
-
-				input_sync(dev + i);
-
-				break;
-
-			case GC_PSX_NORMAL:
-
-				input_report_abs(dev + i, ABS_X, 128 + !(data[0] & 0x20) * 127 - !(data[0] & 0x80) * 128);
-				input_report_abs(dev + i, ABS_Y, 128 + !(data[0] & 0x40) * 127 - !(data[0] & 0x10) * 128);
-
-				for (j = 0; j < 8; j++)
-					input_report_key(dev + i, gc_psx_btn[j], ~data[1] & (1 << j));
-
-				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
-				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
-
-				input_sync(dev + i);
-
-				break;
-		}
-	}
+	if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
+		gc_psx_process_packet(gc);
 
 	mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 }
@@ -468,216 +598,258 @@ static void gc_timer(unsigned long private)
 static int gc_open(struct input_dev *dev)
 {
 	struct gc *gc = dev->private;
+	int err;
+
+	err = mutex_lock_interruptible(&gc->mutex);
+	if (err)
+		return err;
+
 	if (!gc->used++) {
 		parport_claim(gc->pd);
 		parport_write_control(gc->pd->port, 0x04);
 		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 	}
+
+	mutex_unlock(&gc->mutex);
 	return 0;
 }
 
 static void gc_close(struct input_dev *dev)
 {
 	struct gc *gc = dev->private;
+
+	mutex_lock(&gc->mutex);
 	if (!--gc->used) {
-		del_timer(&gc->timer);
+		del_timer_sync(&gc->timer);
 		parport_write_control(gc->pd->port, 0x00);
 		parport_release(gc->pd);
 	}
+	mutex_unlock(&gc->mutex);
 }
 
-static struct gc __init *gc_probe(int *config, int nargs)
+static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
 {
-	struct gc *gc;
-	struct parport *pp;
-	int i, j, psx;
-	unsigned char data[32];
+	struct input_dev *input_dev;
+	int i;
 
-	if (config[0] < 0)
-		return NULL;
+	if (!pad_type)
+		return 0;
 
-	if (nargs < 2) {
-		printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
-		return NULL;
+	if (pad_type < 1 || pad_type > GC_MAX) {
+		printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
+		return -EINVAL;
 	}
 
-	pp = parport_find_number(config[0]);
-
-	if (!pp) {
-		printk(KERN_ERR "gamecon.c: no such parport\n");
-		return NULL;
+	gc->dev[idx] = input_dev = input_allocate_device();
+	if (!input_dev) {
+		printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
+		return -ENOMEM;
 	}
 
-	if (!(gc = kmalloc(sizeof(struct gc), GFP_KERNEL))) {
-		parport_put_port(pp);
-		return NULL;
+	input_dev->name = gc_names[pad_type];
+	input_dev->phys = gc->phys[idx];
+	input_dev->id.bustype = BUS_PARPORT;
+	input_dev->id.vendor = 0x0001;
+	input_dev->id.product = pad_type;
+	input_dev->id.version = 0x0100;
+	input_dev->private = gc;
+
+	input_dev->open = gc_open;
+	input_dev->close = gc_close;
+
+	if (pad_type != GC_SNESMOUSE) {
+		input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+
+		for (i = 0; i < 2; i++)
+			input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
+	} else
+		input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
+
+	gc->pads[0] |= gc_status_bit[idx];
+	gc->pads[pad_type] |= gc_status_bit[idx];
+
+	switch (pad_type) {
+
+		case GC_N64:
+			for (i = 0; i < 10; i++)
+				set_bit(gc_n64_btn[i], input_dev->keybit);
+
+			for (i = 0; i < 2; i++) {
+				input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
+				input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
+			}
+
+			break;
+
+		case GC_SNESMOUSE:
+			set_bit(BTN_LEFT, input_dev->keybit);
+			set_bit(BTN_RIGHT, input_dev->keybit);
+			set_bit(REL_X, input_dev->relbit);
+			set_bit(REL_Y, input_dev->relbit);
+			break;
+
+		case GC_SNES:
+			for (i = 4; i < 8; i++)
+				set_bit(gc_snes_btn[i], input_dev->keybit);
+		case GC_NES:
+			for (i = 0; i < 4; i++)
+				set_bit(gc_snes_btn[i], input_dev->keybit);
+			break;
+
+		case GC_MULTI2:
+			set_bit(BTN_THUMB, input_dev->keybit);
+		case GC_MULTI:
+			set_bit(BTN_TRIGGER, input_dev->keybit);
+			break;
+
+		case GC_PSX:
+			for (i = 0; i < 6; i++)
+				input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
+			for (i = 0; i < 12; i++)
+				set_bit(gc_psx_btn[i], input_dev->keybit);
+
+			break;
+
+		case GC_DDR:
+			for (i = 0; i < 4; i++)
+				set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
+			for (i = 0; i < 12; i++)
+				set_bit(gc_psx_btn[i], input_dev->keybit);
+
+			break;
 	}
-	memset(gc, 0, sizeof(struct gc));
 
-	gc->pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+	return 0;
+}
 
-	parport_put_port(pp);
+static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
+{
+	struct gc *gc;
+	struct parport *pp;
+	struct pardevice *pd;
+	int i;
+	int err;
+
+	pp = parport_find_number(parport);
+	if (!pp) {
+		printk(KERN_ERR "gamecon.c: no such parport\n");
+		err = -EINVAL;
+		goto err_out;
+	}
 
-	if (!gc->pd) {
+	pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+	if (!pd) {
 		printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
-		kfree(gc);
-		return NULL;
+		err = -EBUSY;
+		goto err_put_pp;
 	}
 
-	parport_claim(gc->pd);
+	gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
+	if (!gc) {
+		printk(KERN_ERR "gamecon.c: Not enough memory\n");
+		err = -ENOMEM;
+		goto err_unreg_pardev;
+	}
 
+	mutex_init(&gc->mutex);
+	gc->pd = pd;
 	init_timer(&gc->timer);
 	gc->timer.data = (long) gc;
 	gc->timer.function = gc_timer;
 
-	for (i = 0; i < nargs - 1; i++) {
-
-		if (!config[i + 1])
+	for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
+		if (!pads[i])
 			continue;
 
-		if (config[i + 1] < 1 || config[i + 1] > GC_MAX) {
-			printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", config[i + 1]);
-			continue;
-		}
+		snprintf(gc->phys[i], sizeof(gc->phys[i]),
+			 "%s/input%d", gc->pd->port->name, i);
+		err = gc_setup_pad(gc, i, pads[i]);
+		if (err)
+			goto err_unreg_devs;
 
-                gc->dev[i].private = gc;
-                gc->dev[i].open = gc_open;
-                gc->dev[i].close = gc_close;
-
-                gc->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+		err = input_register_device(gc->dev[i]);
+		if (err)
+			goto err_free_dev;
+	}
 
-		for (j = 0; j < 2; j++) {
-			set_bit(ABS_X + j, gc->dev[i].absbit);
-			gc->dev[i].absmin[ABS_X + j] = -1;
-			gc->dev[i].absmax[ABS_X + j] =  1;
-		}
+	if (!gc->pads[0]) {
+		printk(KERN_ERR "gamecon.c: No valid devices specified\n");
+		err = -EINVAL;
+		goto err_free_gc;
+	}
 
-		gc->pads[0] |= gc_status_bit[i];
-		gc->pads[config[i + 1]] |= gc_status_bit[i];
+	parport_put_port(pp);
+	return gc;
 
-		switch(config[i + 1]) {
+ err_free_dev:
+	input_free_device(gc->dev[i]);
+ err_unreg_devs:
+	while (--i >= 0)
+		if (gc->dev[i])
+			input_unregister_device(gc->dev[i]);
+ err_free_gc:
+	kfree(gc);
+ err_unreg_pardev:
+	parport_unregister_device(pd);
+ err_put_pp:
+	parport_put_port(pp);
+ err_out:
+	return ERR_PTR(err);
+}
 
-			case GC_N64:
-				for (j = 0; j < 10; j++)
-					set_bit(gc_n64_btn[j], gc->dev[i].keybit);
+static void gc_remove(struct gc *gc)
+{
+	int i;
 
-				for (j = 0; j < 2; j++) {
-					set_bit(ABS_X + j, gc->dev[i].absbit);
-					gc->dev[i].absmin[ABS_X + j] = -127;
-					gc->dev[i].absmax[ABS_X + j] =  126;
-					gc->dev[i].absflat[ABS_X + j] = 2;
-					set_bit(ABS_HAT0X + j, gc->dev[i].absbit);
-					gc->dev[i].absmin[ABS_HAT0X + j] = -1;
-					gc->dev[i].absmax[ABS_HAT0X + j] =  1;
-				}
+	for (i = 0; i < GC_MAX_DEVICES; i++)
+		if (gc->dev[i])
+			input_unregister_device(gc->dev[i]);
+	parport_unregister_device(gc->pd);
+	kfree(gc);
+}
 
-				break;
+static int __init gc_init(void)
+{
+	int i;
+	int have_dev = 0;
+	int err = 0;
 
-			case GC_SNES:
-				for (j = 4; j < 8; j++)
-					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
-			case GC_NES:
-				for (j = 0; j < 4; j++)
-					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
-				break;
+	for (i = 0; i < GC_MAX_PORTS; i++) {
+		if (gc[i].nargs == 0 || gc[i].args[0] < 0)
+			continue;
 
-			case GC_MULTI2:
-				set_bit(BTN_THUMB, gc->dev[i].keybit);
-			case GC_MULTI:
-				set_bit(BTN_TRIGGER, gc->dev[i].keybit);
-				break;
+		if (gc[i].nargs < 2) {
+			printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
+			err = -EINVAL;
+			break;
+		}
 
-			case GC_PSX:
-				
-				psx = gc_psx_read_packet(gc, data);
-
-				switch(psx) {
-					case GC_PSX_NEGCON:
-					case GC_PSX_NORMAL:
-					case GC_PSX_ANALOG:
-					case GC_PSX_RUMBLE:
-
-						for (j = 0; j < 6; j++) {
-							psx = gc_psx_abs[j];
-							set_bit(psx, gc->dev[i].absbit);
-							if (j < 4) {
-								gc->dev[i].absmin[psx] = 4;
-								gc->dev[i].absmax[psx] = 252;
-								gc->dev[i].absflat[psx] = 2;
-							} else {
-								gc->dev[i].absmin[psx] = -1;
-								gc->dev[i].absmax[psx] = 1;
-							}
-						}
-
-						for (j = 0; j < 12; j++)
-							set_bit(gc_psx_btn[j], gc->dev[i].keybit);
-
-						break;
-
-					case 0:
-						gc->pads[GC_PSX] &= ~gc_status_bit[i];
-						printk(KERN_ERR "gamecon.c: No PSX controller found.\n");
-						break;
-
-					default:
-						gc->pads[GC_PSX] &= ~gc_status_bit[i];
-						printk(KERN_WARNING "gamecon.c: Unsupported PSX controller %#x,"
-							" please report to <vojtech@ucw.cz>.\n", psx);
-				}
-				break;
+		gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
+		if (IS_ERR(gc_base[i])) {
+			err = PTR_ERR(gc_base[i]);
+			break;
 		}
 
-		sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
-		
-                gc->dev[i].name = gc_names[config[i + 1]];
-		gc->dev[i].phys = gc->phys[i];
-                gc->dev[i].id.bustype = BUS_PARPORT;
-                gc->dev[i].id.vendor = 0x0001;
-                gc->dev[i].id.product = config[i + 1];
-                gc->dev[i].id.version = 0x0100;
+		have_dev = 1;
 	}
 
-	parport_release(gc->pd);
-
-	if (!gc->pads[0]) {
-		parport_unregister_device(gc->pd);
-		kfree(gc);
-		return NULL;
+	if (err) {
+		while (--i >= 0)
+			if (gc_base[i])
+				gc_remove(gc_base[i]);
+		return err;
 	}
 
-	for (i = 0; i < 5; i++) 
-		if (gc->pads[0] & gc_status_bit[i]) {
-			input_register_device(gc->dev + i);
-			printk(KERN_INFO "input: %s on %s\n", gc->dev[i].name, gc->pd->port->name);
-		}
-
-	return gc;
+	return have_dev ? 0 : -ENODEV;
 }
 
-int __init gc_init(void)
+static void __exit gc_exit(void)
 {
-	gc_base[0] = gc_probe(gc, gc_nargs);
-	gc_base[1] = gc_probe(gc_2, gc_nargs_2);
-	gc_base[2] = gc_probe(gc_3, gc_nargs_3);
-
-	if (gc_base[0] || gc_base[1] || gc_base[2])
-		return 0;
-
-	return -ENODEV;
-}
-
-void __exit gc_exit(void)
-{
-	int i, j;
+	int i;
 
-	for (i = 0; i < 3; i++)
-		if (gc_base[i]) {
-			for (j = 0; j < 5; j++)
-				if (gc_base[i]->pads[0] & gc_status_bit[j])
-					input_unregister_device(gc_base[i]->dev + j); 
-			parport_unregister_device(gc_base[i]->pd);
-		}
+	for (i = 0; i < GC_MAX_PORTS; i++)
+		if (gc_base[i])
+			gc_remove(gc_base[i]);
 }
 
 module_init(gc_init);