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