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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/input/mouse/pc110pad.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/input/mouse/pc110pad.c')
-rw-r--r--drivers/input/mouse/pc110pad.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/input/mouse/pc110pad.c b/drivers/input/mouse/pc110pad.c
new file mode 100644
index 000000000000..0c74918fe254
--- /dev/null
+++ b/drivers/input/mouse/pc110pad.c
@@ -0,0 +1,178 @@
1/*
2 * $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $
3 *
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 *
6 * Based on the work of:
7 * Alan Cox Robin O'Leary
8 */
9
10/*
11 * IBM PC110 touchpad driver for Linux
12 */
13
14/*
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 *
29 * Should you need to contact me, the author, you can do so either by
30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
32 */
33
34#include <linux/module.h>
35#include <linux/kernel.h>
36#include <linux/errno.h>
37#include <linux/ioport.h>
38#include <linux/input.h>
39#include <linux/init.h>
40#include <linux/interrupt.h>
41#include <linux/pci.h>
42
43#include <asm/io.h>
44#include <asm/irq.h>
45
46MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
47MODULE_DESCRIPTION("IBM PC110 touchpad driver");
48MODULE_LICENSE("GPL");
49
50#define PC110PAD_OFF 0x30
51#define PC110PAD_ON 0x38
52
53static int pc110pad_irq = 10;
54static int pc110pad_io = 0x15e0;
55
56static struct input_dev pc110pad_dev;
57static int pc110pad_data[3];
58static int pc110pad_count;
59static int pc110pad_used;
60
61static char *pc110pad_name = "IBM PC110 TouchPad";
62static char *pc110pad_phys = "isa15e0/input0";
63
64static irqreturn_t pc110pad_interrupt(int irq, void *ptr, struct pt_regs *regs)
65{
66 int value = inb_p(pc110pad_io);
67 int handshake = inb_p(pc110pad_io + 2);
68
69 outb_p(handshake | 1, pc110pad_io + 2);
70 outb_p(handshake & ~1, pc110pad_io + 2);
71 inb_p(0x64);
72
73 pc110pad_data[pc110pad_count++] = value;
74
75 if (pc110pad_count < 3)
76 return IRQ_HANDLED;
77
78 input_regs(&pc110pad_dev, regs);
79 input_report_key(&pc110pad_dev, BTN_TOUCH,
80 pc110pad_data[0] & 0x01);
81 input_report_abs(&pc110pad_dev, ABS_X,
82 pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
83 input_report_abs(&pc110pad_dev, ABS_Y,
84 pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
85 input_sync(&pc110pad_dev);
86
87 pc110pad_count = 0;
88 return IRQ_HANDLED;
89}
90
91static void pc110pad_close(struct input_dev *dev)
92{
93 if (!--pc110pad_used)
94 outb(PC110PAD_OFF, pc110pad_io + 2);
95}
96
97static int pc110pad_open(struct input_dev *dev)
98{
99 if (pc110pad_used++)
100 return 0;
101
102 pc110pad_interrupt(0,NULL,NULL);
103 pc110pad_interrupt(0,NULL,NULL);
104 pc110pad_interrupt(0,NULL,NULL);
105 outb(PC110PAD_ON, pc110pad_io + 2);
106 pc110pad_count = 0;
107
108 return 0;
109}
110
111/*
112 * We try to avoid enabling the hardware if it's not
113 * there, but we don't know how to test. But we do know
114 * that the PC110 is not a PCI system. So if we find any
115 * PCI devices in the machine, we don't have a PC110.
116 */
117static int __init pc110pad_init(void)
118{
119 struct pci_dev *dev;
120
121 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
122 if (dev) {
123 pci_dev_put(dev);
124 return -ENOENT;
125 }
126
127 if (!request_region(pc110pad_io, 4, "pc110pad")) {
128 printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
129 pc110pad_io, pc110pad_io + 4);
130 return -EBUSY;
131 }
132
133 outb(PC110PAD_OFF, pc110pad_io + 2);
134
135 if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL))
136 {
137 release_region(pc110pad_io, 4);
138 printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
139 return -EBUSY;
140 }
141
142 pc110pad_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
143 pc110pad_dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
144 pc110pad_dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
145
146 pc110pad_dev.absmax[ABS_X] = 0x1ff;
147 pc110pad_dev.absmax[ABS_Y] = 0x0ff;
148
149 pc110pad_dev.open = pc110pad_open;
150 pc110pad_dev.close = pc110pad_close;
151
152 pc110pad_dev.name = pc110pad_name;
153 pc110pad_dev.phys = pc110pad_phys;
154 pc110pad_dev.id.bustype = BUS_ISA;
155 pc110pad_dev.id.vendor = 0x0003;
156 pc110pad_dev.id.product = 0x0001;
157 pc110pad_dev.id.version = 0x0100;
158
159 input_register_device(&pc110pad_dev);
160
161 printk(KERN_INFO "input: %s at %#x irq %d\n",
162 pc110pad_name, pc110pad_io, pc110pad_irq);
163
164 return 0;
165}
166
167static void __exit pc110pad_exit(void)
168{
169 input_unregister_device(&pc110pad_dev);
170
171 outb(PC110PAD_OFF, pc110pad_io + 2);
172
173 free_irq(pc110pad_irq, NULL);
174 release_region(pc110pad_io, 4);
175}
176
177module_init(pc110pad_init);
178module_exit(pc110pad_exit);