xref: /linux/drivers/input/mouse/inport.c (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)
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