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
inport_interrupt(int irq,void * dev_id)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(inport_dev, REL_X, inb(INPORT_DATA_PORT));
76
77 outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
78 input_report_rel(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(inport_dev, BTN_MIDDLE, buttons & 1);
84 input_report_key(inport_dev, BTN_LEFT, buttons & 2);
85 input_report_key(inport_dev, BTN_RIGHT, 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(inport_dev);
91 return IRQ_HANDLED;
92 }
93
inport_open(struct input_dev * dev)94 static int inport_open(struct input_dev *dev)
95 {
96 if (request_irq(inport_irq, inport_interrupt, 0, "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
inport_close(struct input_dev * dev)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
inport_init(void)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(inport_dev);
164 err_release_region:
165 release_region(INPORT_BASE, INPORT_EXTENT);
166
167 return err;
168 }
169
inport_exit(void)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