/* * $Id: gf2k.c,v 1.19 2002/01/22 20:27:43 vojtech Exp $ * *  Copyright (c) 1998-2001 Vojtech Pavlik *//* * Genius Flight 2000 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/delay.h>#include <linux/kernel.h>#include <linux/slab.h>#include <linux/module.h>#include <linux/init.h>#include <linux/input.h>#include <linux/gameport.h>#include <linux/jiffies.h>#define DRIVER_DESC	"Genius Flight 2000 joystick driver"MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION(DRIVER_DESC);MODULE_LICENSE("GPL");#define GF2K_START		400	/* The time we wait for the first bit [400 us] */#define GF2K_STROBE		40	/* The time we wait for the first bit [40 us] */#define GF2K_TIMEOUT		4	/* Wait for everything to settle [4 ms] */#define GF2K_LENGTH		80	/* Max number of triplets in a packet *//* * Genius joystick ids ... */#define GF2K_ID_G09		1#define GF2K_ID_F30D		2#define GF2K_ID_F30		3#define GF2K_ID_F31D		4#define GF2K_ID_F305		5#define GF2K_ID_F23P		6#define GF2K_ID_F31		7#define GF2K_ID_MAX		7static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",				"Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };static short gf2k_seq_reset[] = { 240, 340, 0 };static short gf2k_seq_digital[] = { 590, 320, 860, 0 };struct gf2k {	struct gameport *gameport;	struct input_dev *dev;	int reads;	int bads;	unsigned char id;	unsigned char length;	char phys[32];};/* * gf2k_read_packet() reads a Genius Flight2000 packet. */static int gf2k_read_packet(struct gameport *gameport, int length, char *data){	unsigned char u, v;	int i;	unsigned int t, p;	unsigned long flags;	t = gameport_time(gameport, GF2K_START);	p = gameport_time(gameport, GF2K_STROBE);	i = 0;	local_irq_save(flags);	gameport_trigger(gameport);	v = gameport_read(gameport);	while (t > 0 && i < length) {		t--; u = v;		v = gameport_read(gameport);		if (v & ~u & 0x10) {			data[i++] = v >> 5;			t = p;		}	}	local_irq_restore(flags);	return i;}/* * gf2k_trigger_seq() initializes a Genius Flight2000 joystick * into digital mode. */static void gf2k_trigger_seq(struct gameport *gameport, short *seq){	unsigned long flags;	int i, t;        local_irq_save(flags);	i = 0;        do {		gameport_trigger(gameport);		t = gameport_time(gameport, GF2K_TIMEOUT * 1000);		while ((gameport_read(gameport) & 1) && t) t--;                udelay(seq[i]);        } while (seq[++i]);	gameport_trigger(gameport);	local_irq_restore(flags);}/* * js_sw_get_bits() composes bits from the triplet buffer into a __u64. * Parameter 'pos' is bit number inside packet where to start at, 'num' is number * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits * is number of bits per triplet. */#define GB(p,n,s)	gf2k_get_bits(data, p, n, s)static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift){	__u64 data = 0;	int i;	for (i = 0; i < num / 3 + 2; i++)		data |= buf[pos / 3 + i] << (i * 3);	data >>= pos % 3;	data &= (1 << num) - 1;	data <<= shift;	return data;}static void gf2k_read(struct gf2k *gf2k, unsigned char *data){	struct input_dev *dev = gf2k->dev;	int i, t;	for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)		input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));	for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)		input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));	t = GB(40,4,0);	for (i = 0; i < gf2k_hats[gf2k->id]; i++)		input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);	t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);	for (i = 0; i < gf2k_joys[gf2k->id]; i++)		input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);	for (i = 0; i < gf2k_pads[gf2k->id]; i++)		input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);	input_sync(dev);}/* * gf2k_poll() reads and analyzes Genius joystick data. */static void gf2k_poll(struct gameport *gameport){	struct gf2k *gf2k = gameport_get_drvdata(gameport);	unsigned char data[GF2K_LENGTH];	gf2k->reads++;	if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])		gf2k->bads++;	else		gf2k_read(gf2k, data);}static int gf2k_open(struct input_dev *dev){	struct gf2k *gf2k = dev->private;	gameport_start_polling(gf2k->gameport);	return 0;}static void gf2k_close(struct input_dev *dev){	struct gf2k *gf2k = dev->private;	gameport_stop_polling(gf2k->gameport);}/* * gf2k_connect() probes for Genius id joysticks. */static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv){	struct gf2k *gf2k;	struct input_dev *input_dev;	unsigned char data[GF2K_LENGTH];	int i, err;	gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);	input_dev = input_allocate_device();	if (!gf2k || !input_dev) {		err = -ENOMEM;		goto fail1;	}	gf2k->gameport = gameport;	gf2k->dev = input_dev;	gameport_set_drvdata(gameport, gf2k);	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);	if (err)		goto fail1;	gf2k_trigger_seq(gameport, gf2k_seq_reset);	msleep(GF2K_TIMEOUT);	gf2k_trigger_seq(gameport, gf2k_seq_digital);	msleep(GF2K_TIMEOUT);	if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {		err = -ENODEV;		goto fail2;	}	if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {		err = -ENODEV;		goto fail2;	}#ifdef RESET_WORKS	if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||	    (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {		err = -ENODEV;		goto fail2;	}#else	gf2k->id = 6;#endif	if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {		printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",			gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);		err = -ENODEV;		goto fail2;	}	gameport_set_poll_handler(gameport, gf2k_poll);	gameport_set_poll_interval(gameport, 20);	sprintf(gf2k->phys, "%s/input0", gameport->phys);	gf2k->length = gf2k_lens[gf2k->id];	input_dev->name = gf2k_names[gf2k->id];	input_dev->phys = gf2k->phys;	input_dev->id.bustype = BUS_GAMEPORT;	input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;	input_dev->id.product = gf2k->id;	input_dev->id.version = 0x0100;	input_dev->cdev.dev = &gameport->dev;	input_dev->private = gf2k;	input_dev->open = gf2k_open;	input_dev->close = gf2k_close;	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);	for (i = 0; i < gf2k_axes[gf2k->id]; i++)		set_bit(gf2k_abs[i], input_dev->absbit);	for (i = 0; i < gf2k_hats[gf2k->id]; i++) {		set_bit(ABS_HAT0X + i, input_dev->absbit);		input_dev->absmin[ABS_HAT0X + i] = -1;		input_dev->absmax[ABS_HAT0X + i] = 1;	}	for (i = 0; i < gf2k_joys[gf2k->id]; i++)		set_bit(gf2k_btn_joy[i], input_dev->keybit);	for (i = 0; i < gf2k_pads[gf2k->id]; i++)		set_bit(gf2k_btn_pad[i], input_dev->keybit);	gf2k_read_packet(gameport, gf2k->length, data);	gf2k_read(gf2k, data);	for (i = 0; i < gf2k_axes[gf2k->id]; i++) {		input_dev->absmax[gf2k_abs[i]] = (i < 2) ? input_dev->abs[gf2k_abs[i]] * 2 - 32 :			  input_dev->abs[gf2k_abs[0]] + input_dev->abs[gf2k_abs[1]] - 32;		input_dev->absmin[gf2k_abs[i]] = 32;		input_dev->absfuzz[gf2k_abs[i]] = 8;		input_dev->absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;	}	input_register_device(gf2k->dev);	return 0; fail2:	gameport_close(gameport); fail1:	gameport_set_drvdata(gameport, NULL);	input_free_device(input_dev);	kfree(gf2k);	return err;}static void gf2k_disconnect(struct gameport *gameport){	struct gf2k *gf2k = gameport_get_drvdata(gameport);	input_unregister_device(gf2k->dev);	gameport_close(gameport);	gameport_set_drvdata(gameport, NULL);	kfree(gf2k);}static struct gameport_driver gf2k_drv = {	.driver		= {		.name	= "gf2k",	},	.description	= DRIVER_DESC,	.connect	= gf2k_connect,	.disconnect	= gf2k_disconnect,};static int __init gf2k_init(void){	gameport_register_driver(&gf2k_drv);	return 0;}static void __exit gf2k_exit(void){	gameport_unregister_driver(&gf2k_drv);}module_init(gf2k_init);module_exit(gf2k_exit);