2 * Amiga mouse driver for Linux/m68k
4 * Copyright (c) 2000-2002 Vojtech Pavlik
6 * Based on the work of:
7 * Michael Rausch James Banks
8 * Matther Dillon David Giller
9 * Nathan Laredo Linus Torvalds
10 * Johan Myreen Jes Sorensen
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License version 2 as published by
17 * the Free Software Foundation
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/input.h>
23 #include <linux/interrupt.h>
24 #include <linux/platform_device.h>
27 #include <asm/setup.h>
28 #include <asm/system.h>
29 #include <asm/uaccess.h>
30 #include <asm/amigahw.h>
31 #include <asm/amigaints.h>
34 MODULE_DESCRIPTION("Amiga mouse driver");
35 MODULE_LICENSE("GPL");
37 static int amimouse_lastx, amimouse_lasty;
39 static irqreturn_t amimouse_interrupt(int irq, void *data)
41 struct input_dev *dev = data;
42 unsigned short joy0dat, potgor;
45 joy0dat = amiga_custom.joy0dat;
50 dx = nx - amimouse_lastx;
51 dy = ny - amimouse_lasty;
53 if (dx < -127) dx = (256 + nx) - amimouse_lastx;
54 if (dx > 127) dx = (nx - 256) - amimouse_lastx;
55 if (dy < -127) dy = (256 + ny) - amimouse_lasty;
56 if (dy > 127) dy = (ny - 256) - amimouse_lasty;
61 potgor = amiga_custom.potgor;
63 input_report_rel(dev, REL_X, dx);
64 input_report_rel(dev, REL_Y, dy);
66 input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40);
67 input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
68 input_report_key(dev, BTN_RIGHT, potgor & 0x0400);
75 static int amimouse_open(struct input_dev *dev)
77 unsigned short joy0dat;
80 joy0dat = amiga_custom.joy0dat;
82 amimouse_lastx = joy0dat & 0xff;
83 amimouse_lasty = joy0dat >> 8;
85 error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
88 dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
93 static void amimouse_close(struct input_dev *dev)
95 free_irq(IRQ_AMIGA_VERTB, dev);
98 static int __init amimouse_probe(struct platform_device *pdev)
101 struct input_dev *dev;
103 dev = input_allocate_device();
107 dev->name = pdev->name;
108 dev->phys = "amimouse/input0";
109 dev->id.bustype = BUS_AMIGA;
110 dev->id.vendor = 0x0001;
111 dev->id.product = 0x0002;
112 dev->id.version = 0x0100;
114 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
115 dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
116 dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
117 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
118 dev->open = amimouse_open;
119 dev->close = amimouse_close;
120 dev->dev.parent = &pdev->dev;
122 err = input_register_device(dev);
124 input_free_device(dev);
128 platform_set_drvdata(pdev, dev);
133 static int __exit amimouse_remove(struct platform_device *pdev)
135 struct input_dev *dev = platform_get_drvdata(pdev);
137 platform_set_drvdata(pdev, NULL);
138 input_unregister_device(dev);
142 static struct platform_driver amimouse_driver = {
143 .remove = __exit_p(amimouse_remove),
145 .name = "amiga-mouse",
146 .owner = THIS_MODULE,
150 static int __init amimouse_init(void)
152 return platform_driver_probe(&amimouse_driver, amimouse_probe);
155 module_init(amimouse_init);
157 static void __exit amimouse_exit(void)
159 platform_driver_unregister(&amimouse_driver);
162 module_exit(amimouse_exit);
164 MODULE_ALIAS("platform:amiga-mouse");