1 files changed, 668 insertions, 0 deletions

diff --git a/drivers/char/joystick/gamecon.c b/drivers/char/joystick/gamecon.c
new file mode 100644
index 000000000..a92ef58a9
--- /dev/null
+++ b/drivers/char/joystick/gamecon.c
@@ -0,0 +1,668 @@
+/*
+ * $Id: gamecon.c,v 1.4 2000/05/29 21:08:45 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2000 Vojtech Pavlik
+ *
+ *  Based on the work of:
+ *  	Andree Borrmann		John Dahlstrom
+ *  	David Kuder
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * NES, SNES, N64, Multi1, Multi2, PSX gamepad 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 <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/parport.h>
+#include <linux/input.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
+MODULE_PARM(gc, "2-6i");
+MODULE_PARM(gc_2,"2-6i");
+MODULE_PARM(gc_3,"2-6i");
+
+#define GC_SNES		1
+#define GC_NES		2
+#define GC_NES4		3
+#define GC_MULTI	4
+#define GC_MULTI2	5
+#define GC_N64		6	
+#define GC_PSX		7
+
+#define GC_MAX		7
+
+#define GC_REFRESH_TIME	HZ/100
+ 
+struct gc {
+	struct pardevice *pd;
+	struct input_dev dev[5];
+	struct timer_list timer;
+	unsigned char pads[GC_PSX + 1];
+	int used;
+};
+
+static struct gc *gc_base[3];
+
+static int gc[] __initdata = { -1, 0, 0, 0, 0, 0 };
+static int gc_2[] __initdata = { -1, 0, 0, 0, 0, 0 };
+static int gc_3[] __initdata = { -1, 0, 0, 0, 0, 0 };
+
+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 pad",
+				"PSX NegCon", "PSX Analog contoller" };
+/*
+ * N64 support.
+ */
+
+static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
+static short gc_n64_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START };
+
+#define GC_N64_LENGTH		32		/* N64 bit length, not including stop bit */
+#define GC_N64_REQUEST_LENGTH	37		/* transmit request sequence is 9 bits long */
+#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 */ 
+#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 */
+						/* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
+						/* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
+						/* than 123 us */
+#define GC_N64_CLOCK		0x02		/* clock bits for read */
+
+/* 
+ * 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.
+ */
+
+static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
+{
+	int i;
+	unsigned long flags;
+
+/*
+ * Request the pad to transmit data
+ */
+
+	__save_flags(flags);
+	__cli();
+	for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
+		parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
+		udelay(GC_N64_DWS);
+	}
+	__restore_flags(flags);
+
+/*
+ * Wait for the pad response to be loaded into the 33-bit register of the adapter
+ */
+
+	udelay(GC_N64_DELAY);
+
+/*
+ * Grab data (ignoring the last bit, which is a stop bit)
+ */
+
+	for (i = 0; i < GC_N64_LENGTH; i++) {
+		parport_write_data(gc->pd->port, GC_N64_POWER_R);
+		data[i] = parport_read_status(gc->pd->port);
+		parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
+	 }
+
+/*
+ * We must wait 200 ms here for the controller to reinitialize before the next read request.
+ * No worries as long as gc_read is polled less frequently than this.
+ */
+
+}
+
+/*
+ * 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_POWER	0xfc
+#define GC_NES_CLOCK	0x01
+#define GC_NES_LATCH	0x02
+
+static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
+static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
+static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_START, BTN_SELECT, BTN_X, BTN_Y, BTN_TL, BTN_TR };
+
+/*
+ * gc_nes_read_packet() reads a NES/SNES packet.
+ * Each pad uses one bit per byte. So all pads connected to
+ * this port are read in parallel.
+ */
+
+static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
+{
+	int i;
+
+	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
+	udelay(GC_NES_DELAY * 2);
+	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
+
+	for (i = 0; i < length; i++) {
+		udelay(GC_NES_DELAY);
+		parport_write_data(gc->pd->port, GC_NES_POWER);
+		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
+		udelay(GC_NES_DELAY);
+		parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
+	}
+}
+
+/*
+ * Multisystem joystick support
+ */
+
+#define GC_MULTI_LENGTH		5	/* Multi system joystick packet length is 5 */
+#define GC_MULTI2_LENGTH	6	/* One more bit for one more button */
+
+/*
+ * gc_multi_read_packet() reads a Multisystem joystick packet.
+ */
+
+static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
+{
+	int i;
+
+	for (i = 0; i < length; i++) {
+		parport_write_data(gc->pd->port, ~(1 << i));
+		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
+	}
+}
+
+/*
+ * PSX support
+ */
+
+#define GC_PSX_DELAY	10
+#define GC_PSX_LENGTH	8	/* talk to the controller in bytes */
+
+#define GC_PSX_MOUSE	0x12	/* PSX Mouse */
+#define GC_PSX_NEGCON	0x23	/* NegCon pad */
+#define GC_PSX_NORMAL	0x41	/* Standard Digital controller */
+#define GC_PSX_ANALOGR	0x73	/* Analog controller in Red mode */
+#define GC_PSX_ANALOGG	0x53	/* Analog controller in Green mode */
+
+#define GC_PSX_CLOCK	0x04	/* Pin 3 */
+#define GC_PSX_COMMAND	0x01	/* Pin 1 */
+#define GC_PSX_POWER	0xf8	/* Pins 5-9 */
+#define GC_PSX_SELECT	0x02	/* Pin 2 */
+#define GC_PSX_NOPOWER  0x04
+
+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_THUMB, BTN_THUMB2 };
+
+/*
+ * gc_psx_command() writes 8bit command and reads 8bit data from
+ * the psx pad.
+ */
+
+static int gc_psx_command(struct gc *gc, int b)
+{
+	int i, cmd, ret = 0;
+
+	cmd = (b & 1) ? GC_PSX_COMMAND : 0;
+	for (i = 0; i < 8; i++) {
+		parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
+		udelay(GC_PSX_DELAY);
+		ret |= ((parport_read_status(gc->pd->port) ^ 0x80) & gc->pads[GC_PSX]) ? (1 << i) : 0;
+		cmd = (b & 1) ? GC_PSX_COMMAND : 0;
+		parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
+		udelay(GC_PSX_DELAY);
+		b >>= 1;
+	}
+	return ret;
+}
+
+/*
+ * gc_psx_read_packet() reads a whole psx packet and returns
+ * device identifier code.
+ */
+
+static int gc_psx_read_packet(struct gc *gc, int length, unsigned char *data)
+{
+	int i, ret;
+	unsigned long flags;
+
+	__save_flags(flags);
+	__cli();
+
+	parport_write_data(gc->pd->port, GC_PSX_POWER);
+
+	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);	/* Select pad */
+	udelay(GC_PSX_DELAY * 2);
+	gc_psx_command(gc, 0x01);							/* Access pad */
+	ret = gc_psx_command(gc, 0x42);							/* Get device id */
+	if (gc_psx_command(gc, 0) == 'Z')						/* okay? */
+		for (i = 0; i < length; i++)
+			data[i] = gc_psx_command(gc, 0);
+	else ret = -1;
+
+	parport_write_data(gc->pd->port, GC_PSX_SELECT | GC_PSX_CLOCK | GC_PSX_POWER);
+	__restore_flags(flags);
+
+	return ret;
+}
+
+/*
+ * gc_timer() reads and analyzes console pads data.
+ */
+
+#define GC_MAX_LENGTH GC_N64_LENGTH
+
+static void gc_timer(unsigned long private)
+{
+	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
+ */
+
+	if (gc->pads[GC_N64]) {
+
+		gc_n64_read_packet(gc, data);
+
+		for (i = 0; i < 5; i++) {
+
+			s = gc_status_bit[i];
+
+			if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
+	
+				signed char axes[2];
+				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 + i, ABS_X,  axes[0]);
+				input_report_abs(dev + i, ABS_Y, -axes[1]);
+
+				input_report_abs(dev + i, ABS_HAT0X, !!(s & data[7]) - !!(s & data[6]));
+				input_report_abs(dev + i, ABS_HAT0Y, !!(s & data[5]) - !!(s & data[4]));
+
+				for (j = 0; j < 10; j++)
+					input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
+			}
+		}
+	}
+
+/*
+ * NES and SNES pads
+ */
+
+	if (gc->pads[GC_NES] || gc->pads[GC_SNES]) {
+
+		gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);
+
+		for (i = 0; i < 5; i++) {
+
+			s = gc_status_bit[i];
+
+			if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
+				input_report_abs(dev + i, ABS_X, !!(s & data[7]) - !!(s & data[6]));
+				input_report_abs(dev + i, ABS_Y, !!(s & data[5]) - !!(s & data[4]));
+			}
+
+			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]]);
+
+			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]]);
+		}
+	}
+
+/*
+ * Multi and Multi2 joysticks
+ */
+
+	if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2]) {
+
+		gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
+
+		for (i = 0; i < 5; i++) {
+
+			s = gc_status_bit[i];
+
+			if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
+				input_report_abs(dev + i, ABS_X, !!(s & data[3]) - !!(s & data[2]));
+				input_report_abs(dev + i, ABS_Y, !!(s & data[1]) - !!(s & data[0]));
+				input_report_key(dev + i, BTN_TRIGGER, s & data[4]);
+			}
+
+			if (s & gc->pads[GC_MULTI2])
+				input_report_key(dev + i, BTN_THUMB, s & data[5]);
+		}
+	}
+
+/*
+ * 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, 6, data)) {
+
+			case GC_PSX_ANALOGG:
+	
+				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 << i));
+
+				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
+				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
+
+				break;
+
+			case GC_PSX_ANALOGR:
+
+				input_report_key(dev + i, BTN_THUMB,  ~data[0] & 0x04);
+				input_report_key(dev + i, BTN_THUMB2, ~data[0] & 0x02);
+
+			case GC_PSX_NORMAL:
+			case GC_PSX_NEGCON:
+
+				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 << i));
+
+				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
+				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
+
+				break;
+		}
+	}
+
+	mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
+}
+
+static int gc_open(struct input_dev *dev)
+{
+	struct gc *gc = dev->private;
+	if (!gc->used++) {
+		parport_claim(gc->pd);
+		parport_write_control(gc->pd->port, 0x04);
+		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
+	}
+	return 0;
+}
+
+static void gc_close(struct input_dev *dev)
+{
+	struct gc *gc = dev->private;
+	if (!--gc->used) {
+		del_timer(&gc->timer);
+		parport_write_control(gc->pd->port, 0x00);
+		parport_release(gc->pd);
+	}
+}
+
+
+
+static struct gc __init *gc_probe(int *config)
+{
+	struct gc *gc;
+	struct parport *pp;
+	int i, j, psx, pbtn;
+	unsigned char data[2];
+
+	if (config[0] < 0)
+		return NULL;
+
+	for (pp = parport_enumerate(); pp && (config[0] > 0); pp = pp->next)
+		config[0]--;
+
+	if (!pp) {
+		printk(KERN_ERR "gamecon.c: no such parport\n");
+		return NULL;
+	}
+
+	if (!(gc = kmalloc(sizeof(struct gc), GFP_KERNEL)))
+		return NULL;
+	memset(gc, 0, sizeof(struct gc));
+
+	gc->pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+
+	if (!gc->pd) {
+		printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
+		kfree(gc);
+		return NULL;
+	}
+
+	parport_claim(gc->pd);
+
+	init_timer(&gc->timer);
+	gc->timer.data = (long) gc;
+	gc->timer.function = gc_timer;
+
+	for (i = 0; i < 5; i++) {
+
+		if (!config[i + 1])
+			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;
+		}
+
+                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);
+
+		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;
+		}
+
+		gc->pads[0] |= gc_status_bit[i];
+		gc->pads[config[i + 1]] |= gc_status_bit[i];
+
+		switch(config[i + 1]) {
+
+			case GC_N64:
+				for (j = 0; j < 10; j++)
+					set_bit(gc_n64_btn[j], gc->dev[j].keybit);
+
+				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;
+				}
+
+				break;
+
+			case GC_SNES:
+				for (j = 0; j < 8; j++)
+					set_bit(gc_snes_btn[j], gc->dev[j].keybit);
+				break;
+
+			case GC_NES:
+				for (j = 0; j < 4; j++)
+					set_bit(gc_snes_btn[j], gc->dev[j].keybit);
+				break;
+
+			case GC_MULTI2:
+				set_bit(BTN_THUMB, gc->dev[i].keybit);
+
+			case GC_MULTI:
+				set_bit(BTN_TRIGGER, gc->dev[i].keybit);
+				break;
+
+			case GC_PSX:
+				
+				psx = gc_psx_read_packet(gc, 2, data);
+
+				switch(psx) {
+					case GC_PSX_NEGCON:
+						config[i + 1] += 1;
+					case GC_PSX_NORMAL:
+						pbtn = 10;
+						break;
+
+					case GC_PSX_ANALOGG:
+					case GC_PSX_ANALOGR:
+						config[i + 1] += 2;
+						pbtn = 12;
+						for (j = 0; j < 6; j++) {
+							psx = gc_psx_abs[j];
+							set_bit(psx, gc->dev[i].absbit);
+							gc->dev[i].absmin[psx] = 4;
+							gc->dev[i].absmax[psx] = 252;
+							gc->dev[i].absflat[psx] = 2;
+						}
+						break;
+
+					case -1:
+						gc->pads[GC_PSX] &= ~gc_status_bit[i];
+						pbtn = 0;
+						printk(KERN_ERR "gamecon.c: No PSX controller found.\n");
+						break;
+
+					default:
+						gc->pads[GC_PSX] &= ~gc_status_bit[i];
+						pbtn = 0;
+						printk(KERN_WARNING "gamecon.c: Unsupported PSX controller %#x,"
+							" please report to <vojtech@suse.cz>.\n", psx);
+				}
+
+				for (j = 0; j < pbtn; j++)
+					set_bit(gc_psx_btn[j], gc->dev[i].keybit);
+
+				break;
+		}
+
+                gc->dev[i].name = gc_names[config[i + 1]];
+                gc->dev[i].idbus = BUS_PARPORT;
+                gc->dev[i].idvendor = 0x0001;
+                gc->dev[i].idproduct = config[i + 1];
+                gc->dev[i].idversion = 0x0100;
+	}
+
+	parport_release(gc->pd);
+
+	if (!gc->pads[0]) {
+		parport_unregister_device(gc->pd);
+		kfree(gc);
+		return NULL;
+	}
+
+	for (i = 0; i < 5; i++) 
+		if (gc->pads[0] & gc_status_bit[i]) {
+			input_register_device(gc->dev + i);
+			printk(KERN_INFO "input%d: %s on %s\n", gc->dev[i].number, gc->dev[i].name, gc->pd->port->name);
+		}
+
+	return gc;
+}
+
+#ifndef MODULE
+int __init gc_setup(char *str)
+{
+	int i, ints[7];
+	get_options(str, ARRAY_SIZE(ints), ints);
+	for (i = 0; i <= ints[0] && i < 6; i++) gc[i] = ints[i + 1];
+	return 1;
+}
+int __init gc_setup_2(char *str)
+{
+	int i, ints[7];
+	get_options(str, ARRAY_SIZE(ints), ints);
+	for (i = 0; i <= ints[0] && i < 6; i++) gc_2[i] = ints[i + 1];
+	return 1;
+}
+int __init gc_setup_3(char *str)
+{
+	int i, ints[7];
+	get_options(str, ARRAY_SIZE(ints), ints);
+	for (i = 0; i <= ints[0] && i < 6; i++) gc_3[i] = ints[i + 1];
+	return 1;
+}
+__setup("gc=", gc_setup);
+__setup("gc_2=", gc_setup_2);
+__setup("gc_3=", gc_setup_3);
+#endif
+
+int __init gc_init(void)
+{
+	gc_base[0] = gc_probe(gc);
+	gc_base[1] = gc_probe(gc_2);
+	gc_base[2] = gc_probe(gc_3);
+
+	if (gc_base[0] || gc_base[1] || gc_base[2])
+		return 0;
+
+	return -ENODEV;
+}
+
+void __exit gc_exit(void)
+{
+	int i, j;
+
+	for (i = 0; i < 3; 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);
+	}
+}
+
+module_init(gc_init);
+module_exit(gc_exit);