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1da177e4 LT |
1 | /* |
2 | * $Id: logibm.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $ | |
3 | * | |
4 | * Copyright (c) 1999-2001 Vojtech Pavlik | |
5 | * | |
6 | * Based on the work of: | |
7 | * James Banks Matthew Dillon | |
8 | * David Giller Nathan Laredo | |
9 | * Linus Torvalds Johan Myreen | |
10 | * Cliff Matthews Philip Blundell | |
11 | * Russell King | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Logitech Bus Mouse Driver for Linux | |
16 | */ | |
17 | ||
18 | /* | |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
23 | * | |
24 | * This program is distributed in the hope that it will be useful, | |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License | |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
32 | * | |
33 | * Should you need to contact me, the author, you can do so either by | |
34 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
35 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
36 | */ | |
37 | ||
38 | #include <linux/module.h> | |
39 | #include <linux/moduleparam.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/ioport.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/input.h> | |
44 | #include <linux/interrupt.h> | |
45 | ||
46 | #include <asm/io.h> | |
47 | #include <asm/irq.h> | |
48 | ||
49 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
50 | MODULE_DESCRIPTION("Logitech busmouse driver"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | #define LOGIBM_BASE 0x23c | |
54 | #define LOGIBM_EXTENT 4 | |
55 | ||
56 | #define LOGIBM_DATA_PORT LOGIBM_BASE + 0 | |
57 | #define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1 | |
58 | #define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2 | |
59 | #define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3 | |
60 | ||
61 | #define LOGIBM_ENABLE_IRQ 0x00 | |
62 | #define LOGIBM_DISABLE_IRQ 0x10 | |
63 | #define LOGIBM_READ_X_LOW 0x80 | |
64 | #define LOGIBM_READ_X_HIGH 0xa0 | |
65 | #define LOGIBM_READ_Y_LOW 0xc0 | |
66 | #define LOGIBM_READ_Y_HIGH 0xe0 | |
67 | ||
68 | #define LOGIBM_DEFAULT_MODE 0x90 | |
69 | #define LOGIBM_CONFIG_BYTE 0x91 | |
70 | #define LOGIBM_SIGNATURE_BYTE 0xa5 | |
71 | ||
72 | #define LOGIBM_IRQ 5 | |
73 | ||
74 | static int logibm_irq = LOGIBM_IRQ; | |
75 | module_param_named(irq, logibm_irq, uint, 0); | |
76 | MODULE_PARM_DESC(irq, "IRQ number (5=default)"); | |
77 | ||
78 | __obsolete_setup("logibm_irq="); | |
79 | ||
80 | static int logibm_used = 0; | |
81 | ||
82 | static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
83 | ||
84 | static int logibm_open(struct input_dev *dev) | |
85 | { | |
86 | if (logibm_used++) | |
87 | return 0; | |
88 | if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) { | |
89 | logibm_used--; | |
90 | printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq); | |
91 | return -EBUSY; | |
92 | } | |
93 | outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | static void logibm_close(struct input_dev *dev) | |
98 | { | |
99 | if (--logibm_used) | |
100 | return; | |
101 | outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); | |
102 | free_irq(logibm_irq, NULL); | |
103 | } | |
104 | ||
105 | static struct input_dev logibm_dev = { | |
106 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | |
107 | .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) }, | |
108 | .relbit = { BIT(REL_X) | BIT(REL_Y) }, | |
109 | .open = logibm_open, | |
110 | .close = logibm_close, | |
111 | .name = "Logitech bus mouse", | |
112 | .phys = "isa023c/input0", | |
113 | .id = { | |
114 | .bustype = BUS_ISA, | |
115 | .vendor = 0x0003, | |
116 | .product = 0x0001, | |
117 | .version = 0x0100, | |
118 | }, | |
119 | }; | |
120 | ||
121 | static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
122 | { | |
123 | char dx, dy; | |
124 | unsigned char buttons; | |
125 | ||
126 | outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT); | |
127 | dx = (inb(LOGIBM_DATA_PORT) & 0xf); | |
128 | outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT); | |
129 | dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4; | |
130 | outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT); | |
131 | dy = (inb(LOGIBM_DATA_PORT) & 0xf); | |
132 | outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT); | |
133 | buttons = inb(LOGIBM_DATA_PORT); | |
134 | dy |= (buttons & 0xf) << 4; | |
135 | buttons = ~buttons >> 5; | |
136 | ||
137 | input_regs(&logibm_dev, regs); | |
138 | input_report_rel(&logibm_dev, REL_X, dx); | |
139 | input_report_rel(&logibm_dev, REL_Y, dy); | |
140 | input_report_key(&logibm_dev, BTN_RIGHT, buttons & 1); | |
141 | input_report_key(&logibm_dev, BTN_MIDDLE, buttons & 2); | |
142 | input_report_key(&logibm_dev, BTN_LEFT, buttons & 4); | |
143 | input_sync(&logibm_dev); | |
144 | ||
145 | outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); | |
146 | return IRQ_HANDLED; | |
147 | } | |
148 | ||
149 | static int __init logibm_init(void) | |
150 | { | |
151 | if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) { | |
152 | printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE); | |
153 | return -EBUSY; | |
154 | } | |
155 | ||
156 | outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT); | |
157 | outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT); | |
158 | udelay(100); | |
159 | ||
160 | if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) { | |
161 | release_region(LOGIBM_BASE, LOGIBM_EXTENT); | |
162 | printk(KERN_ERR "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE); | |
163 | return -ENODEV; | |
164 | } | |
165 | ||
166 | outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT); | |
167 | outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); | |
168 | ||
169 | input_register_device(&logibm_dev); | |
170 | ||
171 | printk(KERN_INFO "input: Logitech bus mouse at %#x irq %d\n", LOGIBM_BASE, logibm_irq); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static void __exit logibm_exit(void) | |
177 | { | |
178 | input_unregister_device(&logibm_dev); | |
179 | release_region(LOGIBM_BASE, LOGIBM_EXTENT); | |
180 | } | |
181 | ||
182 | module_init(logibm_init); | |
183 | module_exit(logibm_exit); |