drivers/input/joystick/db9.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * $Id: db9.c,v 1.13 2002/04/07 20:13:37 vojtech Exp $
  *
  *  Copyright (c) 1999-2001 Vojtech Pavlik
  *
  *  Based on the work of:
  *	Andree Borrmann		Mats Sjövall
  */

 /*
  * Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick 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@ucw.cz>, or by paper mail:
  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/parport.h>
 #include <linux/input.h>

 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver");
 MODULE_LICENSE("GPL");

 static int db9[] __initdata = { -1, 0 };
 static int db9_nargs __initdata = 0;
 module_param_array_named(dev, db9, int, &db9_nargs, 0);
 MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");

 static int db9_2[] __initdata = { -1, 0 };
 static int db9_nargs_2 __initdata = 0;
 module_param_array_named(dev2, db9_2, int, &db9_nargs_2, 0);
 MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");

 static int db9_3[] __initdata = { -1, 0 };
 static int db9_nargs_3 __initdata = 0;
 module_param_array_named(dev3, db9_3, int, &db9_nargs_3, 0);
 MODULE_PARM_DESC(dev3, "Describes third attached device (<parport#>,<type>)");

 __obsolete_setup("db9=");
 __obsolete_setup("db9_2=");
 __obsolete_setup("db9_3=");

 #define DB9_MULTI_STICK		0x01
 #define DB9_MULTI2_STICK	0x02
 #define DB9_GENESIS_PAD		0x03
 #define DB9_GENESIS5_PAD	0x05
 #define DB9_GENESIS6_PAD	0x06
 #define DB9_SATURN_PAD		0x07
 #define DB9_MULTI_0802		0x08
 #define DB9_MULTI_0802_2	0x09
 #define DB9_CD32_PAD		0x0A
 #define DB9_SATURN_DPP		0x0B
 #define DB9_SATURN_DPP_2	0x0C
 #define DB9_MAX_PAD		0x0D

 #define DB9_UP			0x01
 #define DB9_DOWN		0x02
 #define DB9_LEFT		0x04
 #define DB9_RIGHT		0x08
 #define DB9_FIRE1		0x10
 #define DB9_FIRE2		0x20
 #define DB9_FIRE3		0x40
 #define DB9_FIRE4		0x80

 #define DB9_NORMAL		0x0a
 #define DB9_NOSELECT		0x08

 #define DB9_MAX_DEVICES 2

 #define DB9_GENESIS6_DELAY	14
 #define DB9_REFRESH_TIME	HZ/100

 struct db9 {
 	struct input_dev dev[DB9_MAX_DEVICES];
 	struct timer_list timer;
 	struct pardevice *pd;
 	int mode;
 	int used;
 	char phys[2][32];
 };

 static struct db9 *db9_base[3];

 static short db9_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
 static short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
 static short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };

 static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 9, 1, 1, 7, 9, 9 };
 static short *db9_btn[DB9_MAX_PAD] = { NULL, db9_multi_btn, db9_multi_btn, db9_genesis_btn, NULL, db9_genesis_btn,
 					db9_genesis_btn, db9_cd32_btn, db9_multi_btn, db9_multi_btn, db9_cd32_btn,
 					db9_cd32_btn, db9_cd32_btn };
 static char *db9_name[DB9_MAX_PAD] = { NULL, "Multisystem joystick", "Multisystem joystick (2 fire)", "Genesis pad",
 				      NULL, "Genesis 5 pad", "Genesis 6 pad", "Saturn pad", "Multisystem (0.8.0.2) joystick",
 				     "Multisystem (0.8.0.2-dual) joystick", "Amiga CD-32 pad", "Saturn dpp", "Saturn dpp dual" };

 static const int db9_max_pads[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 6, 1, 2, 1, 6, 12 };
 static const int db9_num_axis[DB9_MAX_PAD] = { 0, 2, 2, 2, 0, 2, 2, 7, 2, 2, 2 ,7, 7 };
 static const short db9_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_RZ, ABS_Z, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y };
 static const int db9_bidirectional[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0 };
 static const int db9_reverse[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0 };

 /*
  * Saturn controllers
  */
 #define DB9_SATURN_DELAY 300
 static const int db9_saturn_byte[] = { 1, 1, 1, 2, 2, 2, 2, 2, 1 };
 static const unsigned char db9_saturn_mask[] = { 0x04, 0x01, 0x02, 0x40, 0x20, 0x10, 0x08, 0x80, 0x08 };

 /*
  * db9_saturn_write_sub() writes 2 bit data.
  */
 static void db9_saturn_write_sub(struct parport *port, int type, unsigned char data, int powered, int pwr_sub)
 {
 	unsigned char c;

 	switch (type) {
 	case 1: /* DPP1 */
 		c = 0x80 | 0x30 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | data;
 		parport_write_data(port, c);
 		break;
 	case 2: /* DPP2 */
 		c = 0x40 | data << 4 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | 0x03;
 		parport_write_data(port, c);
 		break;
 	case 0:	/* DB9 */
 		c = ((((data & 2) ? 2 : 0) | ((data & 1) ? 4 : 0)) ^ 0x02) | !powered;
 		parport_write_control(port, c);
 		break;
 	}
 }

 /*
  * gc_saturn_read_sub() reads 4 bit data.
  */
 static unsigned char db9_saturn_read_sub(struct parport *port, int type)
 {
 	unsigned char data;

 	if (type) {
 		/* DPP */
 		data = parport_read_status(port) ^ 0x80;
 		return (data & 0x80 ? 1 : 0) | (data & 0x40 ? 2 : 0)
 		     | (data & 0x20 ? 4 : 0) | (data & 0x10 ? 8 : 0);
 	} else {
 		/* DB9 */
 		data = parport_read_data(port) & 0x0f;
 		return (data & 0x8 ? 1 : 0) | (data & 0x4 ? 2 : 0)
 		     | (data & 0x2 ? 4 : 0) | (data & 0x1 ? 8 : 0);
 	}
 }

 /*
  * db9_saturn_read_analog() sends clock and reads 8 bit data.
  */
 static unsigned char db9_saturn_read_analog(struct parport *port, int type, int powered)
 {
 	unsigned char data;

 	db9_saturn_write_sub(port, type, 0, powered, 0);
 	udelay(DB9_SATURN_DELAY);
 	data = db9_saturn_read_sub(port, type) << 4;
 	db9_saturn_write_sub(port, type, 2, powered, 0);
 	udelay(DB9_SATURN_DELAY);
 	data |= db9_saturn_read_sub(port, type);
 	return data;
 }

 /*
  * db9_saturn_read_packet() reads whole saturn packet at connector
  * and returns device identifier code.
  */
 static unsigned char db9_saturn_read_packet(struct parport *port, unsigned char *data, int type, int powered)
 {
 	int i, j;
 	unsigned char tmp;

 	db9_saturn_write_sub(port, type, 3, powered, 0);
 	data[0] = db9_saturn_read_sub(port, type);
 	switch (data[0] & 0x0f) {
 	case 0xf:
 		/* 1111  no pad */
 		return data[0] = 0xff;
 	case 0x4: case 0x4 | 0x8:
 		/* ?100 : digital controller */
 		db9_saturn_write_sub(port, type, 0, powered, 1);
 		data[2] = db9_saturn_read_sub(port, type) << 4;
 		db9_saturn_write_sub(port, type, 2, powered, 1);
 		data[1] = db9_saturn_read_sub(port, type) << 4;
 		db9_saturn_write_sub(port, type, 1, powered, 1);
 		data[1] |= db9_saturn_read_sub(port, type);
 		db9_saturn_write_sub(port, type, 3, powered, 1);
 		/* data[2] |= db9_saturn_read_sub(port, type); */
 		data[2] |= data[0];
 		return data[0] = 0x02;
 	case 0x1:
 		/* 0001 : analog controller or multitap */
 		db9_saturn_write_sub(port, type, 2, powered, 0);
 		udelay(DB9_SATURN_DELAY);
 		data[0] = db9_saturn_read_analog(port, type, powered);
 		if (data[0] != 0x41) {
 			/* read analog controller */
 			for (i = 0; i < (data[0] & 0x0f); i++)
 				data[i + 1] = db9_saturn_read_analog(port, type, powered);
 			db9_saturn_write_sub(port, type, 3, powered, 0);
 			return data[0];
 		} else {
 			/* read multitap */
 			if (db9_saturn_read_analog(port, type, powered) != 0x60)
 				return data[0] = 0xff;
 			for (i = 0; i < 60; i += 10) {
 				data[i] = db9_saturn_read_analog(port, type, powered);
 				if (data[i] != 0xff)
 					/* read each pad */
 					for (j = 0; j < (data[i] & 0x0f); j++)
 						data[i + j + 1] = db9_saturn_read_analog(port, type, powered);
 			}
 			db9_saturn_write_sub(port, type, 3, powered, 0);
 			return 0x41;
 		}
 	case 0x0:
 		/* 0000 : mouse */
 		db9_saturn_write_sub(port, type, 2, powered, 0);
 		udelay(DB9_SATURN_DELAY);
 		tmp = db9_saturn_read_analog(port, type, powered);
 		if (tmp == 0xff) {
 			for (i = 0; i < 3; i++)
 				data[i + 1] = db9_saturn_read_analog(port, type, powered);
 			db9_saturn_write_sub(port, type, 3, powered, 0);
 			return data[0] = 0xe3;
 		}
 	default:
 		return data[0];
 	}
 }

 /*
  * db9_saturn_report() analyzes packet and reports.
  */
 static int db9_saturn_report(unsigned char id, unsigned char data[60], struct input_dev *dev, int n, int max_pads)
 {
 	int tmp, i, j;

 	tmp = (id == 0x41) ? 60 : 10;
 	for (j = 0; (j < tmp) && (n < max_pads); j += 10, n++) {
 		switch (data[j]) {
 		case 0x16: /* multi controller (analog 4 axis) */
 			input_report_abs(dev + n, db9_abs[5], data[j + 6]);
 		case 0x15: /* mission stick (analog 3 axis) */
 			input_report_abs(dev + n, db9_abs[3], data[j + 4]);
 			input_report_abs(dev + n, db9_abs[4], data[j + 5]);
 		case 0x13: /* racing controller (analog 1 axis) */
 			input_report_abs(dev + n, db9_abs[2], data[j + 3]);
 		case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
 		case 0x02: /* digital pad (digital 2 axis + buttons) */
 			input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
 			input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
 			for (i = 0; i < 9; i++)
 				input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
 			break;
 		case 0x19: /* mission stick x2 (analog 6 axis + buttons) */
 			input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
 			input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
 			for (i = 0; i < 9; i++)
 				input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
 			input_report_abs(dev + n, db9_abs[2], data[j + 3]);
 			input_report_abs(dev + n, db9_abs[3], data[j + 4]);
 			input_report_abs(dev + n, db9_abs[4], data[j + 5]);
 			/*
 			input_report_abs(dev + n, db9_abs[8], (data[j + 6] & 128 ? 0 : 1) - (data[j + 6] & 64 ? 0 : 1));
 			input_report_abs(dev + n, db9_abs[9], (data[j + 6] & 32 ? 0 : 1) - (data[j + 6] & 16 ? 0 : 1));
 			*/
 			input_report_abs(dev + n, db9_abs[6], data[j + 7]);
 			input_report_abs(dev + n, db9_abs[7], data[j + 8]);
 			input_report_abs(dev + n, db9_abs[5], data[j + 9]);
 			break;
 		case 0xd3: /* sankyo ff (analog 1 axis + stop btn) */
 			input_report_key(dev + n, BTN_A, data[j + 3] & 0x80);
 			input_report_abs(dev + n, db9_abs[2], data[j + 3] & 0x7f);
 			break;
 		case 0xe3: /* shuttle mouse (analog 2 axis + buttons. signed value) */
 			input_report_key(dev + n, BTN_START, data[j + 1] & 0x08);
 			input_report_key(dev + n, BTN_A, data[j + 1] & 0x04);
 			input_report_key(dev + n, BTN_C, data[j + 1] & 0x02);
 			input_report_key(dev + n, BTN_B, data[j + 1] & 0x01);
 			input_report_abs(dev + n, db9_abs[2], data[j + 2] ^ 0x80);
 			input_report_abs(dev + n, db9_abs[3], (0xff-(data[j + 3] ^ 0x80))+1); /* */
 			break;
 		case 0xff:
 		default: /* no pad */
 			input_report_abs(dev + n, db9_abs[0], 0);
 			input_report_abs(dev + n, db9_abs[1], 0);
 			for (i = 0; i < 9; i++)
 				input_report_key(dev + n, db9_cd32_btn[i], 0);
 			break;
 		}
 	}
 	return n;
 }

 static int db9_saturn(int mode, struct parport *port, struct input_dev *dev)
 {
 	unsigned char id, data[60];
 	int type, n, max_pads;
 	int tmp, i;

 	switch (mode) {
 	case DB9_SATURN_PAD:
 		type = 0;
 		n = 1;
 		break;
 	case DB9_SATURN_DPP:
 		type = 1;
 		n = 1;
 		break;
 	case DB9_SATURN_DPP_2:
 		type = 1;
 		n = 2;
 		break;
 	default:
 		return -1;
 	}
 	max_pads = min(db9_max_pads[mode], DB9_MAX_DEVICES);
 	for (tmp = 0, i = 0; i < n; i++) {
 		id = db9_saturn_read_packet(port, data, type + i, 1);
 		tmp = db9_saturn_report(id, data, dev, tmp, max_pads);
 	}
 	return 0;
 }

 static void db9_timer(unsigned long private)
 {
 	struct db9 *db9 = (void *) private;
 	struct parport *port = db9->pd->port;
 	struct input_dev *dev = db9->dev;
 	int data, i;

 	switch(db9->mode) {
 		case DB9_MULTI_0802_2:

 			data = parport_read_data(port) >> 3;

 			input_report_abs(dev + 1, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev + 1, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev + 1, BTN_TRIGGER, ~data & DB9_FIRE1);

 		case DB9_MULTI_0802:

 			data = parport_read_status(port) >> 3;

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_TRIGGER, data & DB9_FIRE1);
 			break;

 		case DB9_MULTI_STICK:

 			data = parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
 			break;

 		case DB9_MULTI2_STICK:

 			data = parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_THUMB,   ~data & DB9_FIRE2);
 			break;

 		case DB9_GENESIS_PAD:

 			parport_write_control(port, DB9_NOSELECT);
 			data = parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

 			parport_write_control(port, DB9_NORMAL);
 			data=parport_read_data(port);

 			input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
 			break;

 		case DB9_GENESIS5_PAD:

 			parport_write_control(port, DB9_NOSELECT);
 			data=parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

 			parport_write_control(port, DB9_NORMAL);
 			data=parport_read_data(port);

 			input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_X,     ~data & DB9_FIRE2);
 			input_report_key(dev, BTN_Y,     ~data & DB9_LEFT);
 			input_report_key(dev, BTN_START, ~data & DB9_RIGHT);
 			break;

 		case DB9_GENESIS6_PAD:

 			parport_write_control(port, DB9_NOSELECT); /* 1 */
 			udelay(DB9_GENESIS6_DELAY);
 			data=parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
 			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

 			parport_write_control(port, DB9_NORMAL);
 			udelay(DB9_GENESIS6_DELAY);
 			data=parport_read_data(port);

 			input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
 			input_report_key(dev, BTN_START, ~data & DB9_FIRE2);

 			parport_write_control(port, DB9_NOSELECT); /* 2 */
 			udelay(DB9_GENESIS6_DELAY);
 			parport_write_control(port, DB9_NORMAL);
 			udelay(DB9_GENESIS6_DELAY);
 			parport_write_control(port, DB9_NOSELECT); /* 3 */
 			udelay(DB9_GENESIS6_DELAY);
 			data=parport_read_data(port);

 			input_report_key(dev, BTN_X,    ~data & DB9_LEFT);
 			input_report_key(dev, BTN_Y,    ~data & DB9_DOWN);
 			input_report_key(dev, BTN_Z,    ~data & DB9_UP);
 			input_report_key(dev, BTN_MODE, ~data & DB9_RIGHT);

 			parport_write_control(port, DB9_NORMAL);
 			udelay(DB9_GENESIS6_DELAY);
 			parport_write_control(port, DB9_NOSELECT); /* 4 */
 			udelay(DB9_GENESIS6_DELAY);
 			parport_write_control(port, DB9_NORMAL);
 			break;

 		case DB9_SATURN_PAD:
 		case DB9_SATURN_DPP:
 		case DB9_SATURN_DPP_2:

 			db9_saturn(db9->mode, port, dev);
 			break;

 		case DB9_CD32_PAD:

 			data=parport_read_data(port);

 			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
 			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));

 			parport_write_control(port, 0x0a);

 			for (i = 0; i < 7; i++) {
 				data = parport_read_data(port);
 				parport_write_control(port, 0x02);
 				parport_write_control(port, 0x0a);
 				input_report_key(dev, db9_cd32_btn[i], ~data & DB9_FIRE2);
 				}

 			parport_write_control(port, 0x00);
 			break;
 		}

 	input_sync(dev);

 	mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
 }

 static int db9_open(struct input_dev *dev)
 {
 	struct db9 *db9 = dev->private;
 	struct parport *port = db9->pd->port;

 	if (!db9->used++) {
 		parport_claim(db9->pd);
 		parport_write_data(port, 0xff);
 		if (db9_reverse[db9->mode]) {
 			parport_data_reverse(port);
 			parport_write_control(port, DB9_NORMAL);
 		}
 		mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
 	}

 	return 0;
 }

 static void db9_close(struct input_dev *dev)
 {
 	struct db9 *db9 = dev->private;
 	struct parport *port = db9->pd->port;

 	if (!--db9->used) {
 		del_timer(&db9->timer);
 		parport_write_control(port, 0x00);
 		parport_data_forward(port);
 		parport_release(db9->pd);
 	}
 }

 static struct db9 __init *db9_probe(int *config, int nargs)
 {
 	struct db9 *db9;
 	struct parport *pp;
 	int i, j;

 	if (config[0] < 0)
 		return NULL;

 	if (nargs < 2) {
 		printk(KERN_ERR "db9.c: Device type must be specified.\n");
 		return NULL;
 	}

 	if (config[1] < 1 || config[1] >= DB9_MAX_PAD || !db9_buttons[config[1]]) {
 		printk(KERN_ERR "db9.c: bad config\n");
 		return NULL;
 	}

 	pp = parport_find_number(config[0]);
 	if (!pp) {
 		printk(KERN_ERR "db9.c: no such parport\n");
 		return NULL;
 	}

 	if (db9_bidirectional[config[1]]) {
 		if (!(pp->modes & PARPORT_MODE_TRISTATE)) {
 			printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
 			parport_put_port(pp);
 			return NULL;
 		}
 	}

 	if (!(db9 = kmalloc(sizeof(struct db9), GFP_KERNEL))) {
 		parport_put_port(pp);
 		return NULL;
 	}
 	memset(db9, 0, sizeof(struct db9));

 	db9->mode = config[1];
 	init_timer(&db9->timer);
 	db9->timer.data = (long) db9;
 	db9->timer.function = db9_timer;

 	db9->pd = parport_register_device(pp, "db9", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 	parport_put_port(pp);

 	if (!db9->pd) {
 		printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
 		kfree(db9);
 		return NULL;
 	}

 	for (i = 0; i < (min(db9_max_pads[db9->mode], DB9_MAX_DEVICES)); i++) {

 		sprintf(db9->phys[i], "%s/input%d", db9->pd->port->name, i);

 		db9->dev[i].private = db9;
 		db9->dev[i].open = db9_open;
 		db9->dev[i].close = db9_close;

 		db9->dev[i].name = db9_name[db9->mode];
 		db9->dev[i].phys = db9->phys[i];
 		db9->dev[i].id.bustype = BUS_PARPORT;
 		db9->dev[i].id.vendor = 0x0002;
 		db9->dev[i].id.product = config[1];
 		db9->dev[i].id.version = 0x0100;

 		db9->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 		for (j = 0; j < db9_buttons[db9->mode]; j++)
 			set_bit(db9_btn[db9->mode][j], db9->dev[i].keybit);
 		for (j = 0; j < db9_num_axis[db9->mode]; j++) {
 			set_bit(db9_abs[j], db9->dev[i].absbit);
 			if (j < 2) {
 				db9->dev[i].absmin[db9_abs[j]] = -1;
 				db9->dev[i].absmax[db9_abs[j]] = 1;
 			} else {
 				db9->dev[i].absmin[db9_abs[j]] = 1;
 				db9->dev[i].absmax[db9_abs[j]] = 255;
 				db9->dev[i].absflat[db9_abs[j]] = 0;
 			}
 		}
 		input_register_device(db9->dev + i);
 		printk(KERN_INFO "input: %s on %s\n", db9->dev[i].name, db9->pd->port->name);
 	}

 	return db9;
 }

 static int __init db9_init(void)
 {
 	db9_base[0] = db9_probe(db9, db9_nargs);
 	db9_base[1] = db9_probe(db9_2, db9_nargs_2);
 	db9_base[2] = db9_probe(db9_3, db9_nargs_3);

 	if (db9_base[0] || db9_base[1] || db9_base[2])
 		return 0;

 	return -ENODEV;
 }

 static void __exit db9_exit(void)
 {
 	int i, j;

 	for (i = 0; i < 3; i++)
 		if (db9_base[i]) {
 			for (j = 0; j < min(db9_max_pads[db9_base[i]->mode], DB9_MAX_DEVICES); j++)
 				input_unregister_device(db9_base[i]->dev + j);
 		parport_unregister_device(db9_base[i]->pd);
 	}
 }

 module_init(db9_init);
 module_exit(db9_exit);
	/*
	* $Id: db9.c,v 1.13 2002/04/07 20:13:37 vojtech Exp $
	*
	* Copyright (c) 1999-2001 Vojtech Pavlik
	*
	* Based on the work of:
	* Andree Borrmann Mats Sjövall
	*/

	/*
	* Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick 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@ucw.cz>, or by paper mail:
	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/parport.h>
	#include <linux/input.h>

	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	MODULE_DESCRIPTION("Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver");
	MODULE_LICENSE("GPL");

	static int db9[] __initdata = { -1, 0 };
	static int db9_nargs __initdata = 0;
	module_param_array_named(dev, db9, int, &db9_nargs, 0);
	MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");

	static int db9_2[] __initdata = { -1, 0 };
	static int db9_nargs_2 __initdata = 0;
	module_param_array_named(dev2, db9_2, int, &db9_nargs_2, 0);
	MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");

	static int db9_3[] __initdata = { -1, 0 };
	static int db9_nargs_3 __initdata = 0;
	module_param_array_named(dev3, db9_3, int, &db9_nargs_3, 0);
	MODULE_PARM_DESC(dev3, "Describes third attached device (<parport#>,<type>)");

	__obsolete_setup("db9=");
	__obsolete_setup("db9_2=");
	__obsolete_setup("db9_3=");

	#define DB9_MULTI_STICK 0x01
	#define DB9_MULTI2_STICK 0x02
	#define DB9_GENESIS_PAD 0x03
	#define DB9_GENESIS5_PAD 0x05
	#define DB9_GENESIS6_PAD 0x06
	#define DB9_SATURN_PAD 0x07
	#define DB9_MULTI_0802 0x08
	#define DB9_MULTI_0802_2 0x09
	#define DB9_CD32_PAD 0x0A
	#define DB9_SATURN_DPP 0x0B
	#define DB9_SATURN_DPP_2 0x0C
	#define DB9_MAX_PAD 0x0D

	#define DB9_UP 0x01
	#define DB9_DOWN 0x02
	#define DB9_LEFT 0x04
	#define DB9_RIGHT 0x08
	#define DB9_FIRE1 0x10
	#define DB9_FIRE2 0x20
	#define DB9_FIRE3 0x40
	#define DB9_FIRE4 0x80

	#define DB9_NORMAL 0x0a
	#define DB9_NOSELECT 0x08

	#define DB9_MAX_DEVICES 2

	#define DB9_GENESIS6_DELAY 14
	#define DB9_REFRESH_TIME HZ/100

	struct db9 {
	struct input_dev dev[DB9_MAX_DEVICES];
	struct timer_list timer;
	struct pardevice *pd;
	int mode;
	int used;
	char phys[2][32];
	};

	static struct db9 *db9_base[3];

	static short db9_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
	static short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
	static short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };

	static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 9, 1, 1, 7, 9, 9 };
	static short *db9_btn[DB9_MAX_PAD] = { NULL, db9_multi_btn, db9_multi_btn, db9_genesis_btn, NULL, db9_genesis_btn,
	db9_genesis_btn, db9_cd32_btn, db9_multi_btn, db9_multi_btn, db9_cd32_btn,
	db9_cd32_btn, db9_cd32_btn };
	static char *db9_name[DB9_MAX_PAD] = { NULL, "Multisystem joystick", "Multisystem joystick (2 fire)", "Genesis pad",
	NULL, "Genesis 5 pad", "Genesis 6 pad", "Saturn pad", "Multisystem (0.8.0.2) joystick",
	"Multisystem (0.8.0.2-dual) joystick", "Amiga CD-32 pad", "Saturn dpp", "Saturn dpp dual" };

	static const int db9_max_pads[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 6, 1, 2, 1, 6, 12 };
	static const int db9_num_axis[DB9_MAX_PAD] = { 0, 2, 2, 2, 0, 2, 2, 7, 2, 2, 2 ,7, 7 };
	static const short db9_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_RZ, ABS_Z, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y };
	static const int db9_bidirectional[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0 };
	static const int db9_reverse[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0 };

	/*
	* Saturn controllers
	*/
	#define DB9_SATURN_DELAY 300
	static const int db9_saturn_byte[] = { 1, 1, 1, 2, 2, 2, 2, 2, 1 };
	static const unsigned char db9_saturn_mask[] = { 0x04, 0x01, 0x02, 0x40, 0x20, 0x10, 0x08, 0x80, 0x08 };

	/*
	* db9_saturn_write_sub() writes 2 bit data.
	*/
	static void db9_saturn_write_sub(struct parport *port, int type, unsigned char data, int powered, int pwr_sub)
	{
	unsigned char c;

	switch (type) {
	case 1: /* DPP1 */
	c = 0x80 \| 0x30 \| (powered ? 0x08 : 0) \| (pwr_sub ? 0x04 : 0) \| data;
	parport_write_data(port, c);
	break;
	case 2: /* DPP2 */
	c = 0x40 \| data << 4 \| (powered ? 0x08 : 0) \| (pwr_sub ? 0x04 : 0) \| 0x03;
	parport_write_data(port, c);
	break;
	case 0: /* DB9 */
	c = ((((data & 2) ? 2 : 0) \| ((data & 1) ? 4 : 0)) ^ 0x02) \| !powered;
	parport_write_control(port, c);
	break;
	}
	}

	/*
	* gc_saturn_read_sub() reads 4 bit data.
	*/
	static unsigned char db9_saturn_read_sub(struct parport *port, int type)
	{
	unsigned char data;

	if (type) {
	/* DPP */
	data = parport_read_status(port) ^ 0x80;
	return (data & 0x80 ? 1 : 0) \| (data & 0x40 ? 2 : 0)
	\| (data & 0x20 ? 4 : 0) \| (data & 0x10 ? 8 : 0);
	} else {
	/* DB9 */
	data = parport_read_data(port) & 0x0f;
	return (data & 0x8 ? 1 : 0) \| (data & 0x4 ? 2 : 0)
	\| (data & 0x2 ? 4 : 0) \| (data & 0x1 ? 8 : 0);
	}
	}

	/*
	* db9_saturn_read_analog() sends clock and reads 8 bit data.
	*/
	static unsigned char db9_saturn_read_analog(struct parport *port, int type, int powered)
	{
	unsigned char data;

	db9_saturn_write_sub(port, type, 0, powered, 0);
	udelay(DB9_SATURN_DELAY);
	data = db9_saturn_read_sub(port, type) << 4;
	db9_saturn_write_sub(port, type, 2, powered, 0);
	udelay(DB9_SATURN_DELAY);
	data \|= db9_saturn_read_sub(port, type);
	return data;
	}

	/*
	* db9_saturn_read_packet() reads whole saturn packet at connector
	* and returns device identifier code.
	*/
	static unsigned char db9_saturn_read_packet(struct parport port, unsigned char data, int type, int powered)
	{
	int i, j;
	unsigned char tmp;

	db9_saturn_write_sub(port, type, 3, powered, 0);
	data[0] = db9_saturn_read_sub(port, type);
	switch (data[0] & 0x0f) {
	case 0xf:
	/* 1111 no pad */
	return data[0] = 0xff;
	case 0x4: case 0x4 \| 0x8:
	/* ?100 : digital controller */
	db9_saturn_write_sub(port, type, 0, powered, 1);
	data[2] = db9_saturn_read_sub(port, type) << 4;
	db9_saturn_write_sub(port, type, 2, powered, 1);
	data[1] = db9_saturn_read_sub(port, type) << 4;
	db9_saturn_write_sub(port, type, 1, powered, 1);
	data[1] \|= db9_saturn_read_sub(port, type);
	db9_saturn_write_sub(port, type, 3, powered, 1);
	/* data[2] \|= db9_saturn_read_sub(port, type); */
	data[2] \|= data[0];
	return data[0] = 0x02;
	case 0x1:
	/* 0001 : analog controller or multitap */
	db9_saturn_write_sub(port, type, 2, powered, 0);
	udelay(DB9_SATURN_DELAY);
	data[0] = db9_saturn_read_analog(port, type, powered);
	if (data[0] != 0x41) {
	/* read analog controller */
	for (i = 0; i < (data[0] & 0x0f); i++)
	data[i + 1] = db9_saturn_read_analog(port, type, powered);
	db9_saturn_write_sub(port, type, 3, powered, 0);
	return data[0];
	} else {
	/* read multitap */
	if (db9_saturn_read_analog(port, type, powered) != 0x60)
	return data[0] = 0xff;
	for (i = 0; i < 60; i += 10) {
	data[i] = db9_saturn_read_analog(port, type, powered);
	if (data[i] != 0xff)
	/* read each pad */
	for (j = 0; j < (data[i] & 0x0f); j++)
	data[i + j + 1] = db9_saturn_read_analog(port, type, powered);
	}
	db9_saturn_write_sub(port, type, 3, powered, 0);
	return 0x41;
	}
	case 0x0:
	/* 0000 : mouse */
	db9_saturn_write_sub(port, type, 2, powered, 0);
	udelay(DB9_SATURN_DELAY);
	tmp = db9_saturn_read_analog(port, type, powered);
	if (tmp == 0xff) {
	for (i = 0; i < 3; i++)
	data[i + 1] = db9_saturn_read_analog(port, type, powered);
	db9_saturn_write_sub(port, type, 3, powered, 0);
	return data[0] = 0xe3;
	}
	default:
	return data[0];
	}
	}

	/*
	* db9_saturn_report() analyzes packet and reports.
	*/
	static int db9_saturn_report(unsigned char id, unsigned char data[60], struct input_dev *dev, int n, int max_pads)
	{
	int tmp, i, j;

	tmp = (id == 0x41) ? 60 : 10;
	for (j = 0; (j < tmp) && (n < max_pads); j += 10, n++) {
	switch (data[j]) {
	case 0x16: /* multi controller (analog 4 axis) */
	input_report_abs(dev + n, db9_abs[5], data[j + 6]);
	case 0x15: /* mission stick (analog 3 axis) */
	input_report_abs(dev + n, db9_abs[3], data[j + 4]);
	input_report_abs(dev + n, db9_abs[4], data[j + 5]);
	case 0x13: /* racing controller (analog 1 axis) */
	input_report_abs(dev + n, db9_abs[2], data[j + 3]);
	case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
	case 0x02: /* digital pad (digital 2 axis + buttons) */
	input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
	input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
	for (i = 0; i < 9; i++)
	input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
	break;
	case 0x19: /* mission stick x2 (analog 6 axis + buttons) */
	input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
	input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
	for (i = 0; i < 9; i++)
	input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
	input_report_abs(dev + n, db9_abs[2], data[j + 3]);
	input_report_abs(dev + n, db9_abs[3], data[j + 4]);
	input_report_abs(dev + n, db9_abs[4], data[j + 5]);
	/*
	input_report_abs(dev + n, db9_abs[8], (data[j + 6] & 128 ? 0 : 1) - (data[j + 6] & 64 ? 0 : 1));
	input_report_abs(dev + n, db9_abs[9], (data[j + 6] & 32 ? 0 : 1) - (data[j + 6] & 16 ? 0 : 1));
	*/
	input_report_abs(dev + n, db9_abs[6], data[j + 7]);
	input_report_abs(dev + n, db9_abs[7], data[j + 8]);
	input_report_abs(dev + n, db9_abs[5], data[j + 9]);
	break;
	case 0xd3: /* sankyo ff (analog 1 axis + stop btn) */
	input_report_key(dev + n, BTN_A, data[j + 3] & 0x80);
	input_report_abs(dev + n, db9_abs[2], data[j + 3] & 0x7f);
	break;
	case 0xe3: /* shuttle mouse (analog 2 axis + buttons. signed value) */
	input_report_key(dev + n, BTN_START, data[j + 1] & 0x08);
	input_report_key(dev + n, BTN_A, data[j + 1] & 0x04);
	input_report_key(dev + n, BTN_C, data[j + 1] & 0x02);
	input_report_key(dev + n, BTN_B, data[j + 1] & 0x01);
	input_report_abs(dev + n, db9_abs[2], data[j + 2] ^ 0x80);
	input_report_abs(dev + n, db9_abs[3], (0xff-(data[j + 3] ^ 0x80))+1); /* */
	break;
	case 0xff:
	default: /* no pad */
	input_report_abs(dev + n, db9_abs[0], 0);
	input_report_abs(dev + n, db9_abs[1], 0);
	for (i = 0; i < 9; i++)
	input_report_key(dev + n, db9_cd32_btn[i], 0);
	break;
	}
	}
	return n;
	}

	static int db9_saturn(int mode, struct parport port, struct input_dev dev)
	{
	unsigned char id, data[60];
	int type, n, max_pads;
	int tmp, i;

	switch (mode) {
	case DB9_SATURN_PAD:
	type = 0;
	n = 1;
	break;
	case DB9_SATURN_DPP:
	type = 1;
	n = 1;
	break;
	case DB9_SATURN_DPP_2:
	type = 1;
	n = 2;
	break;
	default:
	return -1;
	}
	max_pads = min(db9_max_pads[mode], DB9_MAX_DEVICES);
	for (tmp = 0, i = 0; i < n; i++) {
	id = db9_saturn_read_packet(port, data, type + i, 1);
	tmp = db9_saturn_report(id, data, dev, tmp, max_pads);
	}
	return 0;
	}

	static void db9_timer(unsigned long private)
	{
	struct db9 db9 = (void ) private;
	struct parport *port = db9->pd->port;
	struct input_dev *dev = db9->dev;
	int data, i;

	switch(db9->mode) {
	case DB9_MULTI_0802_2:

	data = parport_read_data(port) >> 3;

	input_report_abs(dev + 1, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev + 1, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev + 1, BTN_TRIGGER, ~data & DB9_FIRE1);

	case DB9_MULTI_0802:

	data = parport_read_status(port) >> 3;

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_TRIGGER, data & DB9_FIRE1);
	break;

	case DB9_MULTI_STICK:

	data = parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
	break;

	case DB9_MULTI2_STICK:

	data = parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_THUMB, ~data & DB9_FIRE2);
	break;

	case DB9_GENESIS_PAD:

	parport_write_control(port, DB9_NOSELECT);
	data = parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

	parport_write_control(port, DB9_NORMAL);
	data=parport_read_data(port);

	input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
	break;

	case DB9_GENESIS5_PAD:

	parport_write_control(port, DB9_NOSELECT);
	data=parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

	parport_write_control(port, DB9_NORMAL);
	data=parport_read_data(port);

	input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_X, ~data & DB9_FIRE2);
	input_report_key(dev, BTN_Y, ~data & DB9_LEFT);
	input_report_key(dev, BTN_START, ~data & DB9_RIGHT);
	break;

	case DB9_GENESIS6_PAD:

	parport_write_control(port, DB9_NOSELECT); /* 1 */
	udelay(DB9_GENESIS6_DELAY);
	data=parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
	input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

	parport_write_control(port, DB9_NORMAL);
	udelay(DB9_GENESIS6_DELAY);
	data=parport_read_data(port);

	input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
	input_report_key(dev, BTN_START, ~data & DB9_FIRE2);

	parport_write_control(port, DB9_NOSELECT); /* 2 */
	udelay(DB9_GENESIS6_DELAY);
	parport_write_control(port, DB9_NORMAL);
	udelay(DB9_GENESIS6_DELAY);
	parport_write_control(port, DB9_NOSELECT); /* 3 */
	udelay(DB9_GENESIS6_DELAY);
	data=parport_read_data(port);

	input_report_key(dev, BTN_X, ~data & DB9_LEFT);
	input_report_key(dev, BTN_Y, ~data & DB9_DOWN);
	input_report_key(dev, BTN_Z, ~data & DB9_UP);
	input_report_key(dev, BTN_MODE, ~data & DB9_RIGHT);

	parport_write_control(port, DB9_NORMAL);
	udelay(DB9_GENESIS6_DELAY);
	parport_write_control(port, DB9_NOSELECT); /* 4 */
	udelay(DB9_GENESIS6_DELAY);
	parport_write_control(port, DB9_NORMAL);
	break;

	case DB9_SATURN_PAD:
	case DB9_SATURN_DPP:
	case DB9_SATURN_DPP_2:

	db9_saturn(db9->mode, port, dev);
	break;

	case DB9_CD32_PAD:

	data=parport_read_data(port);

	input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
	input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));

	parport_write_control(port, 0x0a);

	for (i = 0; i < 7; i++) {
	data = parport_read_data(port);
	parport_write_control(port, 0x02);
	parport_write_control(port, 0x0a);
	input_report_key(dev, db9_cd32_btn[i], ~data & DB9_FIRE2);
	}

	parport_write_control(port, 0x00);
	break;
	}

	input_sync(dev);

	mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
	}

	static int db9_open(struct input_dev *dev)
	{
	struct db9 *db9 = dev->private;
	struct parport *port = db9->pd->port;

	if (!db9->used++) {
	parport_claim(db9->pd);
	parport_write_data(port, 0xff);
	if (db9_reverse[db9->mode]) {
	parport_data_reverse(port);
	parport_write_control(port, DB9_NORMAL);
	}
	mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
	}

	return 0;
	}

	static void db9_close(struct input_dev *dev)
	{
	struct db9 *db9 = dev->private;
	struct parport *port = db9->pd->port;

	if (!--db9->used) {
	del_timer(&db9->timer);
	parport_write_control(port, 0x00);
	parport_data_forward(port);
	parport_release(db9->pd);
	}
	}

	static struct db9 __init db9_probe(int config, int nargs)
	{
	struct db9 *db9;
	struct parport *pp;
	int i, j;

	if (config[0] < 0)
	return NULL;

	if (nargs < 2) {
	printk(KERN_ERR "db9.c: Device type must be specified.\n");
	return NULL;
	}

	if (config[1] < 1 \|\| config[1] >= DB9_MAX_PAD \|\| !db9_buttons[config[1]]) {
	printk(KERN_ERR "db9.c: bad config\n");
	return NULL;
	}

	pp = parport_find_number(config[0]);
	if (!pp) {
	printk(KERN_ERR "db9.c: no such parport\n");
	return NULL;
	}

	if (db9_bidirectional[config[1]]) {
	if (!(pp->modes & PARPORT_MODE_TRISTATE)) {
	printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
	parport_put_port(pp);
	return NULL;
	}
	}

	if (!(db9 = kmalloc(sizeof(struct db9), GFP_KERNEL))) {
	parport_put_port(pp);
	return NULL;
	}
	memset(db9, 0, sizeof(struct db9));

	db9->mode = config[1];
	init_timer(&db9->timer);
	db9->timer.data = (long) db9;
	db9->timer.function = db9_timer;

	db9->pd = parport_register_device(pp, "db9", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	parport_put_port(pp);

	if (!db9->pd) {
	printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
	kfree(db9);
	return NULL;
	}

	for (i = 0; i < (min(db9_max_pads[db9->mode], DB9_MAX_DEVICES)); i++) {

	sprintf(db9->phys[i], "%s/input%d", db9->pd->port->name, i);

	db9->dev[i].private = db9;
	db9->dev[i].open = db9_open;
	db9->dev[i].close = db9_close;

	db9->dev[i].name = db9_name[db9->mode];
	db9->dev[i].phys = db9->phys[i];
	db9->dev[i].id.bustype = BUS_PARPORT;
	db9->dev[i].id.vendor = 0x0002;
	db9->dev[i].id.product = config[1];
	db9->dev[i].id.version = 0x0100;

	db9->dev[i].evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	for (j = 0; j < db9_buttons[db9->mode]; j++)
	set_bit(db9_btn[db9->mode][j], db9->dev[i].keybit);
	for (j = 0; j < db9_num_axis[db9->mode]; j++) {
	set_bit(db9_abs[j], db9->dev[i].absbit);
	if (j < 2) {
	db9->dev[i].absmin[db9_abs[j]] = -1;
	db9->dev[i].absmax[db9_abs[j]] = 1;
	} else {
	db9->dev[i].absmin[db9_abs[j]] = 1;
	db9->dev[i].absmax[db9_abs[j]] = 255;
	db9->dev[i].absflat[db9_abs[j]] = 0;
	}
	}
	input_register_device(db9->dev + i);
	printk(KERN_INFO "input: %s on %s\n", db9->dev[i].name, db9->pd->port->name);
	}

	return db9;
	}

	static int __init db9_init(void)
	{
	db9_base[0] = db9_probe(db9, db9_nargs);
	db9_base[1] = db9_probe(db9_2, db9_nargs_2);
	db9_base[2] = db9_probe(db9_3, db9_nargs_3);

	if (db9_base[0] \|\| db9_base[1] \|\| db9_base[2])
	return 0;

	return -ENODEV;
	}

	static void __exit db9_exit(void)
	{
	int i, j;

	for (i = 0; i < 3; i++)
	if (db9_base[i]) {
	for (j = 0; j < min(db9_max_pads[db9_base[i]->mode], DB9_MAX_DEVICES); j++)
	input_unregister_device(db9_base[i]->dev + j);
	parport_unregister_device(db9_base[i]->pd);
	}
	}

	module_init(db9_init);
	module_exit(db9_exit);