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1da177e4 LT |
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> | |
314c926f | 24 | #include <linux/platform_device.h> |
1da177e4 LT |
25 | |
26 | #include <asm/irq.h> | |
27 | #include <asm/setup.h> | |
7c0f6ba6 | 28 | #include <linux/uaccess.h> |
1da177e4 LT |
29 | #include <asm/amigahw.h> |
30 | #include <asm/amigaints.h> | |
31 | ||
32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
33 | MODULE_DESCRIPTION("Amiga mouse driver"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
1da177e4 | 36 | static int amimouse_lastx, amimouse_lasty; |
1da177e4 | 37 | |
314c926f | 38 | static irqreturn_t amimouse_interrupt(int irq, void *data) |
1da177e4 | 39 | { |
314c926f | 40 | struct input_dev *dev = data; |
1da177e4 LT |
41 | unsigned short joy0dat, potgor; |
42 | int nx, ny, dx, dy; | |
43 | ||
b4290a23 | 44 | joy0dat = amiga_custom.joy0dat; |
1da177e4 LT |
45 | |
46 | nx = joy0dat & 0xff; | |
47 | ny = joy0dat >> 8; | |
48 | ||
49 | dx = nx - amimouse_lastx; | |
50 | dy = ny - amimouse_lasty; | |
51 | ||
52 | if (dx < -127) dx = (256 + nx) - amimouse_lastx; | |
53 | if (dx > 127) dx = (nx - 256) - amimouse_lastx; | |
54 | if (dy < -127) dy = (256 + ny) - amimouse_lasty; | |
55 | if (dy > 127) dy = (ny - 256) - amimouse_lasty; | |
56 | ||
57 | amimouse_lastx = nx; | |
58 | amimouse_lasty = ny; | |
59 | ||
b4290a23 | 60 | potgor = amiga_custom.potgor; |
1da177e4 | 61 | |
314c926f GU |
62 | input_report_rel(dev, REL_X, dx); |
63 | input_report_rel(dev, REL_Y, dy); | |
1da177e4 | 64 | |
314c926f GU |
65 | input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40); |
66 | input_report_key(dev, BTN_MIDDLE, potgor & 0x0100); | |
67 | input_report_key(dev, BTN_RIGHT, potgor & 0x0400); | |
1da177e4 | 68 | |
314c926f | 69 | input_sync(dev); |
1da177e4 LT |
70 | |
71 | return IRQ_HANDLED; | |
72 | } | |
73 | ||
74 | static int amimouse_open(struct input_dev *dev) | |
75 | { | |
76 | unsigned short joy0dat; | |
314c926f | 77 | int error; |
1da177e4 | 78 | |
b4290a23 | 79 | joy0dat = amiga_custom.joy0dat; |
1da177e4 LT |
80 | |
81 | amimouse_lastx = joy0dat & 0xff; | |
82 | amimouse_lasty = joy0dat >> 8; | |
83 | ||
314c926f GU |
84 | error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", |
85 | dev); | |
86 | if (error) | |
87 | dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB); | |
1da177e4 | 88 | |
314c926f | 89 | return error; |
1da177e4 LT |
90 | } |
91 | ||
92 | static void amimouse_close(struct input_dev *dev) | |
93 | { | |
314c926f | 94 | free_irq(IRQ_AMIGA_VERTB, dev); |
1da177e4 LT |
95 | } |
96 | ||
314c926f | 97 | static int __init amimouse_probe(struct platform_device *pdev) |
1da177e4 | 98 | { |
72155615 | 99 | int err; |
314c926f | 100 | struct input_dev *dev; |
72155615 | 101 | |
314c926f GU |
102 | dev = input_allocate_device(); |
103 | if (!dev) | |
2e5b636b DT |
104 | return -ENOMEM; |
105 | ||
314c926f GU |
106 | dev->name = pdev->name; |
107 | dev->phys = "amimouse/input0"; | |
108 | dev->id.bustype = BUS_AMIGA; | |
109 | dev->id.vendor = 0x0001; | |
110 | dev->id.product = 0x0002; | |
111 | dev->id.version = 0x0100; | |
1da177e4 | 112 | |
314c926f GU |
113 | dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
114 | dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); | |
115 | dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | | |
7b19ada2 | 116 | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); |
314c926f GU |
117 | dev->open = amimouse_open; |
118 | dev->close = amimouse_close; | |
119 | dev->dev.parent = &pdev->dev; | |
1da177e4 | 120 | |
314c926f | 121 | err = input_register_device(dev); |
72155615 | 122 | if (err) { |
314c926f | 123 | input_free_device(dev); |
72155615 DT |
124 | return err; |
125 | } | |
1da177e4 | 126 | |
314c926f GU |
127 | platform_set_drvdata(pdev, dev); |
128 | ||
1da177e4 LT |
129 | return 0; |
130 | } | |
131 | ||
314c926f | 132 | static int __exit amimouse_remove(struct platform_device *pdev) |
1da177e4 | 133 | { |
314c926f GU |
134 | struct input_dev *dev = platform_get_drvdata(pdev); |
135 | ||
314c926f GU |
136 | input_unregister_device(dev); |
137 | return 0; | |
138 | } | |
139 | ||
140 | static struct platform_driver amimouse_driver = { | |
141 | .remove = __exit_p(amimouse_remove), | |
142 | .driver = { | |
143 | .name = "amiga-mouse", | |
314c926f GU |
144 | }, |
145 | }; | |
d3d25808 | 146 | |
e492fe27 | 147 | module_platform_driver_probe(amimouse_driver, amimouse_probe); |
314c926f GU |
148 | |
149 | MODULE_ALIAS("platform:amiga-mouse"); |