// SPDX-License-Identifier: GPL-2.0-or-later/* *  Copyright (c) 1998-2001 Vojtech Pavlik */ /* * FP-Gaming Assassin 3D joystick driver for Linux */ #include <linux/kernel.h>#include <linux/module.h>#include <linux/slab.h>#include <linux/gameport.h>#include <linux/input.h>#include <linux/jiffies.h> #define DRIVER_DESC	"FP-Gaming Assassin 3D joystick driver" MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION(DRIVER_DESC);MODULE_LICENSE("GPL"); #define A3D_MAX_START		600	/* 600 us */#define A3D_MAX_STROBE		80	/* 80 us */#define A3D_MAX_LENGTH		40	/* 40*3 bits */ #define A3D_MODE_A3D		1	/* Assassin 3D */#define A3D_MODE_PAN		2	/* Panther */#define A3D_MODE_OEM		3	/* Panther OEM version */#define A3D_MODE_PXL		4	/* Panther XL */ static char *a3d_names[] = { NULL, "FP-Gaming Assassin 3D", "MadCatz Panther", "OEM Panther",			"MadCatz Panther XL", "MadCatz Panther XL w/ rudder" }; struct a3d {	struct gameport *gameport;	struct gameport *adc;	struct input_dev *dev;	int axes[4];	int buttons;	int mode;	int length;	int reads;	int bads;	char phys[32];}; /* * a3d_read_packet() reads an Assassin 3D packet. */ static int a3d_read_packet(struct gameport *gameport, int length, char *data){	unsigned long flags;	unsigned char u, v;	unsigned int t, s;	int i; 	i = 0;	t = gameport_time(gameport, A3D_MAX_START);	s = gameport_time(gameport, A3D_MAX_STROBE); 	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 = s;		}	} 	local_irq_restore(flags); 	return i;} /* * a3d_csum() computes checksum of triplet packet */ static int a3d_csum(char *data, int count){	int i, csum = 0; 	for (i = 0; i < count - 2; i++)		csum += data[i];	return (csum & 0x3f) != ((data[count - 2] << 3) | data[count - 1]);} static void a3d_read(struct a3d *a3d, unsigned char *data){	struct input_dev *dev = a3d->dev; 	switch (a3d->mode) { 		case A3D_MODE_A3D:		case A3D_MODE_OEM:		case A3D_MODE_PAN: 			input_report_rel(dev, REL_X, ((data[5] << 6) | (data[6] << 3) | data[ 7]) - ((data[5] & 4) << 7));			input_report_rel(dev, REL_Y, ((data[8] << 6) | (data[9] << 3) | data[10]) - ((data[8] & 4) << 7)); 			input_report_key(dev, BTN_RIGHT,  data[2] & 1);			input_report_key(dev, BTN_LEFT,   data[3] & 2);			input_report_key(dev, BTN_MIDDLE, data[3] & 4); 			input_sync(dev); 			a3d->axes[0] = ((signed char)((data[11] << 6) | (data[12] << 3) | (data[13]))) + 128;			a3d->axes[1] = ((signed char)((data[14] << 6) | (data[15] << 3) | (data[16]))) + 128;			a3d->axes[2] = ((signed char)((data[17] << 6) | (data[18] << 3) | (data[19]))) + 128;			a3d->axes[3] = ((signed char)((data[20] << 6) | (data[21] << 3) | (data[22]))) + 128; 			a3d->buttons = ((data[3] << 3) | data[4]) & 0xf; 			break; 		case A3D_MODE_PXL: 			input_report_rel(dev, REL_X, ((data[ 9] << 6) | (data[10] << 3) | data[11]) - ((data[ 9] & 4) << 7));			input_report_rel(dev, REL_Y, ((data[12] << 6) | (data[13] << 3) | data[14]) - ((data[12] & 4) << 7)); 			input_report_key(dev, BTN_RIGHT,  data[2] & 1);			input_report_key(dev, BTN_LEFT,   data[3] & 2);			input_report_key(dev, BTN_MIDDLE, data[3] & 4);			input_report_key(dev, BTN_SIDE,   data[7] & 2);			input_report_key(dev, BTN_EXTRA,  data[7] & 4); 			input_report_abs(dev, ABS_X,        ((signed char)((data[15] << 6) | (data[16] << 3) | (data[17]))) + 128);			input_report_abs(dev, ABS_Y,        ((signed char)((data[18] << 6) | (data[19] << 3) | (data[20]))) + 128);			input_report_abs(dev, ABS_RUDDER,   ((signed char)((data[21] << 6) | (data[22] << 3) | (data[23]))) + 128);			input_report_abs(dev, ABS_THROTTLE, ((signed char)((data[24] << 6) | (data[25] << 3) | (data[26]))) + 128); 			input_report_abs(dev, ABS_HAT0X, ( data[5]       & 1) - ((data[5] >> 2) & 1));			input_report_abs(dev, ABS_HAT0Y, ((data[5] >> 1) & 1) - ((data[6] >> 2) & 1));			input_report_abs(dev, ABS_HAT1X, ((data[4] >> 1) & 1) - ( data[3]       & 1));			input_report_abs(dev, ABS_HAT1Y, ((data[4] >> 2) & 1) - ( data[4]       & 1)); 			input_report_key(dev, BTN_TRIGGER, data[8] & 1);			input_report_key(dev, BTN_THUMB,   data[8] & 2);			input_report_key(dev, BTN_TOP,     data[8] & 4);			input_report_key(dev, BTN_PINKIE,  data[7] & 1); 			input_sync(dev); 			break;	}}  /* * a3d_poll() reads and analyzes A3D joystick data. */ static void a3d_poll(struct gameport *gameport){	struct a3d *a3d = gameport_get_drvdata(gameport);	unsigned char data[A3D_MAX_LENGTH]; 	a3d->reads++;	if (a3d_read_packet(a3d->gameport, a3d->length, data) != a3d->length ||	    data[0] != a3d->mode || a3d_csum(data, a3d->length))		a3d->bads++;	else		a3d_read(a3d, data);} /* * a3d_adc_cooked_read() copies the acis and button data to the * callers arrays. It could do the read itself, but the caller could * call this more than 50 times a second, which would use too much CPU. */ static int a3d_adc_cooked_read(struct gameport *gameport, int *axes, int *buttons){	struct a3d *a3d = gameport->port_data;	int i; 	for (i = 0; i < 4; i++)		axes[i] = (a3d->axes[i] < 254) ? a3d->axes[i] : -1;	*buttons = a3d->buttons;	return 0;} /* * a3d_adc_open() is the gameport open routine. It refuses to serve * any but cooked data. */ static int a3d_adc_open(struct gameport *gameport, int mode){	struct a3d *a3d = gameport->port_data; 	if (mode != GAMEPORT_MODE_COOKED)		return -1; 	gameport_start_polling(a3d->gameport);	return 0;} /* * a3d_adc_close() is a callback from the input close routine. */ static void a3d_adc_close(struct gameport *gameport){	struct a3d *a3d = gameport->port_data; 	gameport_stop_polling(a3d->gameport);} /* * a3d_open() is a callback from the input open routine. */ static int a3d_open(struct input_dev *dev){	struct a3d *a3d = input_get_drvdata(dev); 	gameport_start_polling(a3d->gameport);	return 0;} /* * a3d_close() is a callback from the input close routine. */ static void a3d_close(struct input_dev *dev){	struct a3d *a3d = input_get_drvdata(dev); 	gameport_stop_polling(a3d->gameport);} /* * a3d_connect() probes for A3D joysticks. */ static int a3d_connect(struct gameport *gameport, struct gameport_driver *drv){	struct a3d *a3d;	struct input_dev *input_dev;	struct gameport *adc;	unsigned char data[A3D_MAX_LENGTH];	int i;	int err; 	a3d = kzalloc_obj(*a3d);	input_dev = input_allocate_device();	if (!a3d || !input_dev) {		err = -ENOMEM;		goto fail1;	} 	a3d->dev = input_dev;	a3d->gameport = gameport; 	gameport_set_drvdata(gameport, a3d); 	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);	if (err)		goto fail1; 	i = a3d_read_packet(gameport, A3D_MAX_LENGTH, data); 	if (!i || a3d_csum(data, i)) {		err = -ENODEV;		goto fail2;	} 	a3d->mode = data[0]; 	if (!a3d->mode || a3d->mode > 5) {		printk(KERN_WARNING "a3d.c: Unknown A3D device detected "			"(%s, id=%d), contact <vojtech@ucw.cz>\n", gameport->phys, a3d->mode);		err = -ENODEV;		goto fail2;	} 	gameport_set_poll_handler(gameport, a3d_poll);	gameport_set_poll_interval(gameport, 20); 	snprintf(a3d->phys, sizeof(a3d->phys), "%s/input0", gameport->phys); 	input_dev->name = a3d_names[a3d->mode];	input_dev->phys = a3d->phys;	input_dev->id.bustype = BUS_GAMEPORT;	input_dev->id.vendor = GAMEPORT_ID_VENDOR_MADCATZ;	input_dev->id.product = a3d->mode;	input_dev->id.version = 0x0100;	input_dev->dev.parent = &gameport->dev;	input_dev->open = a3d_open;	input_dev->close = a3d_close; 	input_set_drvdata(input_dev, a3d); 	if (a3d->mode == A3D_MODE_PXL) { 		int axes[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER }; 		a3d->length = 33; 		input_dev->evbit[0] |= BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY) |			BIT_MASK(EV_REL);		input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);		input_dev->absbit[0] |= BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |			BIT_MASK(ABS_THROTTLE) | BIT_MASK(ABS_RUDDER) |			BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |			BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y);		input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |			BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) |			BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);		input_dev->keybit[BIT_WORD(BTN_JOYSTICK)] |=			BIT_MASK(BTN_TRIGGER) | BIT_MASK(BTN_THUMB) |			BIT_MASK(BTN_TOP) | BIT_MASK(BTN_PINKIE); 		a3d_read(a3d, data); 		for (i = 0; i < 4; i++) {			if (i < 2)				input_set_abs_params(input_dev, axes[i],					48, input_abs_get_val(input_dev, axes[i]) * 2 - 48, 0, 8);			else				input_set_abs_params(input_dev, axes[i], 2, 253, 0, 0);			input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);		} 	} else {		a3d->length = 29; 		input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);		input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);		input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |			BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE); 		a3d_read(a3d, data); 		if (!(a3d->adc = adc = gameport_allocate_port()))			printk(KERN_ERR "a3d: Not enough memory for ADC port\n");		else {			adc->port_data = a3d;			adc->open = a3d_adc_open;			adc->close = a3d_adc_close;			adc->cooked_read = a3d_adc_cooked_read;			adc->fuzz = 1; 			gameport_set_name(adc, a3d_names[a3d->mode]);			gameport_set_phys(adc, "%s/gameport0", gameport->phys);			adc->dev.parent = &gameport->dev; 			gameport_register_port(adc);		}	} 	err = input_register_device(a3d->dev);	if (err)		goto fail3; 	return 0;  fail3:	if (a3d->adc)		gameport_unregister_port(a3d->adc); fail2:	gameport_close(gameport); fail1:	gameport_set_drvdata(gameport, NULL);	input_free_device(input_dev);	kfree(a3d);	return err;} static void a3d_disconnect(struct gameport *gameport){	struct a3d *a3d = gameport_get_drvdata(gameport); 	input_unregister_device(a3d->dev);	if (a3d->adc)		gameport_unregister_port(a3d->adc);	gameport_close(gameport);	gameport_set_drvdata(gameport, NULL);	kfree(a3d);} static struct gameport_driver a3d_drv = {	.driver		= {		.name	= "adc",		.owner	= THIS_MODULE,	},	.description	= DRIVER_DESC,	.connect	= a3d_connect,	.disconnect	= a3d_disconnect,}; module_gameport_driver(a3d_drv);