// SPDX-License-Identifier: GPL-2.0-or-later/* *  Copyright (c) 1998-2001 Vojtech Pavlik */ /* * Driver for Amiga joysticks for Linux/m68k */ #include <linux/types.h>#include <linux/errno.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/init.h>#include <linux/input.h>#include <linux/interrupt.h>#include <linux/mutex.h> #include <asm/amigahw.h>#include <asm/amigaints.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION("Driver for Amiga joysticks");MODULE_LICENSE("GPL"); static int amijoy[2] = { 0, 1 };module_param_array_named(map, amijoy, uint, NULL, 0);MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)"); static int amijoy_used;static DEFINE_MUTEX(amijoy_mutex);static struct input_dev *amijoy_dev[2];static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" }; static irqreturn_t amijoy_interrupt(int irq, void *dummy){	int i, data = 0, button = 0; 	for (i = 0; i < 2; i++)		if (amijoy[i]) { 			switch (i) {				case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;				case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;			} 			input_report_key(amijoy_dev[i], BTN_TRIGGER, button); 			input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));			data = ~(data ^ (data << 1));			input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1)); 			input_sync(amijoy_dev[i]);		}	return IRQ_HANDLED;} static int amijoy_open(struct input_dev *dev){	int err; 	err = mutex_lock_interruptible(&amijoy_mutex);	if (err)		return err; 	if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {		printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);		err = -EBUSY;		goto out;	} 	amijoy_used++;out:	mutex_unlock(&amijoy_mutex);	return err;} static void amijoy_close(struct input_dev *dev){	mutex_lock(&amijoy_mutex);	if (!--amijoy_used)		free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);	mutex_unlock(&amijoy_mutex);} static int __init amijoy_init(void){	int i, j;	int err; 	if (!MACH_IS_AMIGA)		return -ENODEV; 	for (i = 0; i < 2; i++) {		if (!amijoy[i])			continue; 		amijoy_dev[i] = input_allocate_device();		if (!amijoy_dev[i]) {			err = -ENOMEM;			goto fail;		} 		if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {			input_free_device(amijoy_dev[i]);			err = -EBUSY;			goto fail;		} 		amijoy_dev[i]->name = "Amiga joystick";		amijoy_dev[i]->phys = amijoy_phys[i];		amijoy_dev[i]->id.bustype = BUS_AMIGA;		amijoy_dev[i]->id.vendor = 0x0001;		amijoy_dev[i]->id.product = 0x0003;		amijoy_dev[i]->id.version = 0x0100; 		amijoy_dev[i]->open = amijoy_open;		amijoy_dev[i]->close = amijoy_close; 		amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);		amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);		amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |			BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);		for (j = 0; j < 2; j++) {			input_set_abs_params(amijoy_dev[i], ABS_X + j,					     -1, 1, 0, 0);		} 		err = input_register_device(amijoy_dev[i]);		if (err) {			input_free_device(amijoy_dev[i]);			goto fail;		}	}	return 0;  fail:	while (--i >= 0)		if (amijoy[i]) {			input_unregister_device(amijoy_dev[i]);			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);		}	return err;} static void __exit amijoy_exit(void){	int i; 	for (i = 0; i < 2; i++)		if (amijoy[i]) {			input_unregister_device(amijoy_dev[i]);			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);		}} module_init(amijoy_init);module_exit(amijoy_exit);