Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
[platform/kernel/linux-starfive.git] / drivers / input / mouse / inport.c
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(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
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
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(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);