1 /*
2 * Amiga mouse driver for Linux/m68k
3 *
4 * Copyright (c) 2000-2002 Vojtech Pavlik
5 *
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
11 * Russell King
12 */
13
14 /*
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
18 */
19
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>
25
26 #include <asm/irq.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>
32
33 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
34 MODULE_DESCRIPTION("Amiga mouse driver");
35 MODULE_LICENSE("GPL");
36
37 static int amimouse_lastx, amimouse_lasty;
38
amimouse_interrupt(int irq,void * data)39 static irqreturn_t amimouse_interrupt(int irq, void *data)
40 {
41 struct input_dev *dev = data;
42 unsigned short joy0dat, potgor;
43 int nx, ny, dx, dy;
44
45 joy0dat = amiga_custom.joy0dat;
46
47 nx = joy0dat & 0xff;
48 ny = joy0dat >> 8;
49
50 dx = nx - amimouse_lastx;
51 dy = ny - amimouse_lasty;
52
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;
57
58 amimouse_lastx = nx;
59 amimouse_lasty = ny;
60
61 potgor = amiga_custom.potgor;
62
63 input_report_rel(dev, REL_X, dx);
64 input_report_rel(dev, REL_Y, dy);
65
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);
69
70 input_sync(dev);
71
72 return IRQ_HANDLED;
73 }
74
amimouse_open(struct input_dev * dev)75 static int amimouse_open(struct input_dev *dev)
76 {
77 unsigned short joy0dat;
78 int error;
79
80 joy0dat = amiga_custom.joy0dat;
81
82 amimouse_lastx = joy0dat & 0xff;
83 amimouse_lasty = joy0dat >> 8;
84
85 error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
86 dev);
87 if (error)
88 dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
89
90 return error;
91 }
92
amimouse_close(struct input_dev * dev)93 static void amimouse_close(struct input_dev *dev)
94 {
95 free_irq(IRQ_AMIGA_VERTB, dev);
96 }
97
amimouse_probe(struct platform_device * pdev)98 static int __init amimouse_probe(struct platform_device *pdev)
99 {
100 int err;
101 struct input_dev *dev;
102
103 dev = input_allocate_device();
104 if (!dev)
105 return -ENOMEM;
106
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;
113
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;
121
122 err = input_register_device(dev);
123 if (err) {
124 input_free_device(dev);
125 return err;
126 }
127
128 platform_set_drvdata(pdev, dev);
129
130 return 0;
131 }
132
amimouse_remove(struct platform_device * pdev)133 static int __exit amimouse_remove(struct platform_device *pdev)
134 {
135 struct input_dev *dev = platform_get_drvdata(pdev);
136
137 platform_set_drvdata(pdev, NULL);
138 input_unregister_device(dev);
139 return 0;
140 }
141
142 static struct platform_driver amimouse_driver = {
143 .remove = __exit_p(amimouse_remove),
144 .driver = {
145 .name = "amiga-mouse",
146 .owner = THIS_MODULE,
147 },
148 };
149
amimouse_init(void)150 static int __init amimouse_init(void)
151 {
152 return platform_driver_probe(&amimouse_driver, amimouse_probe);
153 }
154
155 module_init(amimouse_init);
156
amimouse_exit(void)157 static void __exit amimouse_exit(void)
158 {
159 platform_driver_unregister(&amimouse_driver);
160 }
161
162 module_exit(amimouse_exit);
163
164 MODULE_ALIAS("platform:amiga-mouse");
165