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1da177e4 LT |
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: | |
968ac842 | 7 | * Alan Cox Robin O'Leary |
1da177e4 LT |
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 | ||
46 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
47 | MODULE_DESCRIPTION("IBM PC110 touchpad driver"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | #define PC110PAD_OFF 0x30 | |
51 | #define PC110PAD_ON 0x38 | |
52 | ||
53 | static int pc110pad_irq = 10; | |
54 | static int pc110pad_io = 0x15e0; | |
55 | ||
2e5b636b | 56 | static struct input_dev *pc110pad_dev; |
1da177e4 LT |
57 | static int pc110pad_data[3]; |
58 | static int pc110pad_count; | |
1da177e4 | 59 | |
1da177e4 LT |
60 | static irqreturn_t pc110pad_interrupt(int irq, void *ptr, struct pt_regs *regs) |
61 | { | |
62 | int value = inb_p(pc110pad_io); | |
63 | int handshake = inb_p(pc110pad_io + 2); | |
64 | ||
65 | outb_p(handshake | 1, pc110pad_io + 2); | |
66 | outb_p(handshake & ~1, pc110pad_io + 2); | |
67 | inb_p(0x64); | |
68 | ||
69 | pc110pad_data[pc110pad_count++] = value; | |
70 | ||
71 | if (pc110pad_count < 3) | |
72 | return IRQ_HANDLED; | |
968ac842 | 73 | |
2e5b636b DT |
74 | input_regs(pc110pad_dev, regs); |
75 | input_report_key(pc110pad_dev, BTN_TOUCH, | |
1da177e4 | 76 | pc110pad_data[0] & 0x01); |
2e5b636b | 77 | input_report_abs(pc110pad_dev, ABS_X, |
1da177e4 | 78 | pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100)); |
2e5b636b | 79 | input_report_abs(pc110pad_dev, ABS_Y, |
1da177e4 | 80 | pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80)); |
2e5b636b | 81 | input_sync(pc110pad_dev); |
1da177e4 LT |
82 | |
83 | pc110pad_count = 0; | |
84 | return IRQ_HANDLED; | |
85 | } | |
86 | ||
87 | static void pc110pad_close(struct input_dev *dev) | |
88 | { | |
3108d42d | 89 | outb(PC110PAD_OFF, pc110pad_io + 2); |
1da177e4 LT |
90 | } |
91 | ||
92 | static int pc110pad_open(struct input_dev *dev) | |
93 | { | |
2e5b636b DT |
94 | pc110pad_interrupt(0, NULL, NULL); |
95 | pc110pad_interrupt(0, NULL, NULL); | |
96 | pc110pad_interrupt(0, NULL, NULL); | |
1da177e4 LT |
97 | outb(PC110PAD_ON, pc110pad_io + 2); |
98 | pc110pad_count = 0; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | /* | |
104 | * We try to avoid enabling the hardware if it's not | |
105 | * there, but we don't know how to test. But we do know | |
106 | * that the PC110 is not a PCI system. So if we find any | |
107 | * PCI devices in the machine, we don't have a PC110. | |
108 | */ | |
109 | static int __init pc110pad_init(void) | |
110 | { | |
111 | struct pci_dev *dev; | |
112 | ||
113 | dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); | |
114 | if (dev) { | |
115 | pci_dev_put(dev); | |
116 | return -ENOENT; | |
117 | } | |
118 | ||
119 | if (!request_region(pc110pad_io, 4, "pc110pad")) { | |
120 | printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n", | |
121 | pc110pad_io, pc110pad_io + 4); | |
122 | return -EBUSY; | |
123 | } | |
124 | ||
125 | outb(PC110PAD_OFF, pc110pad_io + 2); | |
126 | ||
2e5b636b | 127 | if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) { |
1da177e4 LT |
128 | release_region(pc110pad_io, 4); |
129 | printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq); | |
130 | return -EBUSY; | |
131 | } | |
132 | ||
2e5b636b DT |
133 | if (!(pc110pad_dev = input_allocate_device())) { |
134 | free_irq(pc110pad_irq, NULL); | |
135 | release_region(pc110pad_io, 4); | |
136 | printk(KERN_ERR "pc110pad: Not enough memory.\n"); | |
137 | return -ENOMEM; | |
138 | } | |
1da177e4 | 139 | |
2e5b636b DT |
140 | pc110pad_dev->name = "IBM PC110 TouchPad"; |
141 | pc110pad_dev->phys = "isa15e0/input0"; | |
142 | pc110pad_dev->id.bustype = BUS_ISA; | |
143 | pc110pad_dev->id.vendor = 0x0003; | |
144 | pc110pad_dev->id.product = 0x0001; | |
145 | pc110pad_dev->id.version = 0x0100; | |
968ac842 | 146 | |
2e5b636b DT |
147 | pc110pad_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
148 | pc110pad_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y); | |
149 | pc110pad_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); | |
1da177e4 | 150 | |
2e5b636b DT |
151 | pc110pad_dev->absmax[ABS_X] = 0x1ff; |
152 | pc110pad_dev->absmax[ABS_Y] = 0x0ff; | |
1da177e4 | 153 | |
2e5b636b DT |
154 | pc110pad_dev->open = pc110pad_open; |
155 | pc110pad_dev->close = pc110pad_close; | |
1da177e4 | 156 | |
2e5b636b | 157 | input_register_device(pc110pad_dev); |
968ac842 | 158 | |
1da177e4 LT |
159 | return 0; |
160 | } | |
968ac842 | 161 | |
1da177e4 LT |
162 | static void __exit pc110pad_exit(void) |
163 | { | |
1da177e4 | 164 | outb(PC110PAD_OFF, pc110pad_io + 2); |
1da177e4 | 165 | free_irq(pc110pad_irq, NULL); |
2e5b636b | 166 | input_unregister_device(pc110pad_dev); |
1da177e4 LT |
167 | release_region(pc110pad_io, 4); |
168 | } | |
169 | ||
170 | module_init(pc110pad_init); | |
171 | module_exit(pc110pad_exit); |