1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 1999-2001 Vojtech Pavlik |
4 | * |
5 | * Based on the work of: |
6 | * Teemu Rantanen Derrick Cole |
7 | * Peter Cervasio Christoph Niemann |
8 | * Philip Blundell Russell King |
9 | * Bob Harris |
10 | */ |
11 | |
12 | /* |
13 | * Inport (ATI XL and Microsoft) busmouse driver for Linux |
14 | */ |
15 | |
16 | #include <linux/module.h> |
17 | #include <linux/ioport.h> |
18 | #include <linux/init.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/input.h> |
21 | |
22 | #include <asm/io.h> |
23 | #include <asm/irq.h> |
24 | |
25 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
26 | MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver" ); |
27 | MODULE_LICENSE("GPL" ); |
28 | |
29 | #define INPORT_BASE 0x23c |
30 | #define INPORT_EXTENT 4 |
31 | |
32 | #define INPORT_CONTROL_PORT INPORT_BASE + 0 |
33 | #define INPORT_DATA_PORT INPORT_BASE + 1 |
34 | #define INPORT_SIGNATURE_PORT INPORT_BASE + 2 |
35 | |
36 | #define INPORT_REG_BTNS 0x00 |
37 | #define INPORT_REG_X 0x01 |
38 | #define INPORT_REG_Y 0x02 |
39 | #define INPORT_REG_MODE 0x07 |
40 | #define INPORT_RESET 0x80 |
41 | |
42 | #ifdef CONFIG_MOUSE_ATIXL |
43 | #define INPORT_NAME "ATI XL Mouse" |
44 | #define INPORT_VENDOR 0x0002 |
45 | #define INPORT_SPEED_30HZ 0x01 |
46 | #define INPORT_SPEED_50HZ 0x02 |
47 | #define INPORT_SPEED_100HZ 0x03 |
48 | #define INPORT_SPEED_200HZ 0x04 |
49 | #define INPORT_MODE_BASE INPORT_SPEED_100HZ |
50 | #define INPORT_MODE_IRQ 0x08 |
51 | #else |
52 | #define INPORT_NAME "Microsoft InPort Mouse" |
53 | #define INPORT_VENDOR 0x0001 |
54 | #define INPORT_MODE_BASE 0x10 |
55 | #define INPORT_MODE_IRQ 0x01 |
56 | #endif |
57 | #define INPORT_MODE_HOLD 0x20 |
58 | |
59 | #define INPORT_IRQ 5 |
60 | |
61 | static int inport_irq = INPORT_IRQ; |
62 | module_param_hw_named(irq, inport_irq, uint, irq, 0); |
63 | MODULE_PARM_DESC(irq, "IRQ number (5=default)" ); |
64 | |
65 | static struct input_dev *inport_dev; |
66 | |
67 | static irqreturn_t inport_interrupt(int irq, void *dev_id) |
68 | { |
69 | unsigned char buttons; |
70 | |
71 | outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); |
72 | outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); |
73 | |
74 | outb(INPORT_REG_X, INPORT_CONTROL_PORT); |
75 | input_report_rel(dev: inport_dev, REL_X, inb(INPORT_DATA_PORT)); |
76 | |
77 | outb(INPORT_REG_Y, INPORT_CONTROL_PORT); |
78 | input_report_rel(dev: inport_dev, REL_Y, inb(INPORT_DATA_PORT)); |
79 | |
80 | outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT); |
81 | buttons = inb(INPORT_DATA_PORT); |
82 | |
83 | input_report_key(dev: inport_dev, BTN_MIDDLE, value: buttons & 1); |
84 | input_report_key(dev: inport_dev, BTN_LEFT, value: buttons & 2); |
85 | input_report_key(dev: inport_dev, BTN_RIGHT, value: buttons & 4); |
86 | |
87 | outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); |
88 | outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); |
89 | |
90 | input_sync(dev: inport_dev); |
91 | return IRQ_HANDLED; |
92 | } |
93 | |
94 | static int inport_open(struct input_dev *dev) |
95 | { |
96 | if (request_irq(irq: inport_irq, handler: inport_interrupt, flags: 0, name: "inport" , NULL)) |
97 | return -EBUSY; |
98 | outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); |
99 | outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); |
100 | |
101 | return 0; |
102 | } |
103 | |
104 | static void inport_close(struct input_dev *dev) |
105 | { |
106 | outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); |
107 | outb(INPORT_MODE_BASE, INPORT_DATA_PORT); |
108 | free_irq(inport_irq, NULL); |
109 | } |
110 | |
111 | static int __init inport_init(void) |
112 | { |
113 | unsigned char a, b, c; |
114 | int err; |
115 | |
116 | if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport" )) { |
117 | printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n" , INPORT_BASE); |
118 | return -EBUSY; |
119 | } |
120 | |
121 | a = inb(INPORT_SIGNATURE_PORT); |
122 | b = inb(INPORT_SIGNATURE_PORT); |
123 | c = inb(INPORT_SIGNATURE_PORT); |
124 | if (a == b || a != c) { |
125 | printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n" , INPORT_BASE); |
126 | err = -ENODEV; |
127 | goto err_release_region; |
128 | } |
129 | |
130 | inport_dev = input_allocate_device(); |
131 | if (!inport_dev) { |
132 | printk(KERN_ERR "inport.c: Not enough memory for input device\n" ); |
133 | err = -ENOMEM; |
134 | goto err_release_region; |
135 | } |
136 | |
137 | inport_dev->name = INPORT_NAME; |
138 | inport_dev->phys = "isa023c/input0" ; |
139 | inport_dev->id.bustype = BUS_ISA; |
140 | inport_dev->id.vendor = INPORT_VENDOR; |
141 | inport_dev->id.product = 0x0001; |
142 | inport_dev->id.version = 0x0100; |
143 | |
144 | inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
145 | inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | |
146 | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); |
147 | inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); |
148 | |
149 | inport_dev->open = inport_open; |
150 | inport_dev->close = inport_close; |
151 | |
152 | outb(INPORT_RESET, INPORT_CONTROL_PORT); |
153 | outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); |
154 | outb(INPORT_MODE_BASE, INPORT_DATA_PORT); |
155 | |
156 | err = input_register_device(inport_dev); |
157 | if (err) |
158 | goto err_free_dev; |
159 | |
160 | return 0; |
161 | |
162 | err_free_dev: |
163 | input_free_device(dev: inport_dev); |
164 | err_release_region: |
165 | release_region(INPORT_BASE, INPORT_EXTENT); |
166 | |
167 | return err; |
168 | } |
169 | |
170 | static void __exit inport_exit(void) |
171 | { |
172 | input_unregister_device(inport_dev); |
173 | release_region(INPORT_BASE, INPORT_EXTENT); |
174 | } |
175 | |
176 | module_init(inport_init); |
177 | module_exit(inport_exit); |
178 | |