aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/basler/excite/excite_iodev.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/basler/excite/excite_iodev.c')
-rw-r--r--arch/mips/basler/excite/excite_iodev.c178
1 files changed, 0 insertions, 178 deletions
diff --git a/arch/mips/basler/excite/excite_iodev.c b/arch/mips/basler/excite/excite_iodev.c
deleted file mode 100644
index 938b1d0b7652..000000000000
--- a/arch/mips/basler/excite/excite_iodev.c
+++ /dev/null
@@ -1,178 +0,0 @@
1/*
2 * Copyright (C) 2005 by Basler Vision Technologies AG
3 * Author: Thomas Koeller <thomas.koeller@baslerweb.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/compiler.h>
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/sched.h>
24#include <linux/wait.h>
25#include <linux/poll.h>
26#include <linux/interrupt.h>
27#include <linux/platform_device.h>
28#include <linux/miscdevice.h>
29#include <linux/smp_lock.h>
30
31#include "excite_iodev.h"
32
33
34
35static const struct resource *iodev_get_resource(struct platform_device *, const char *, unsigned int);
36static int __init iodev_probe(struct platform_device *);
37static int __exit iodev_remove(struct platform_device *);
38static int iodev_open(struct inode *, struct file *);
39static int iodev_release(struct inode *, struct file *);
40static ssize_t iodev_read(struct file *, char __user *, size_t s, loff_t *);
41static unsigned int iodev_poll(struct file *, struct poll_table_struct *);
42static irqreturn_t iodev_irqhdl(int, void *);
43
44
45
46static const char iodev_name[] = "iodev";
47static unsigned int iodev_irq;
48static DECLARE_WAIT_QUEUE_HEAD(wq);
49
50
51
52static const struct file_operations fops =
53{
54 .owner = THIS_MODULE,
55 .open = iodev_open,
56 .release = iodev_release,
57 .read = iodev_read,
58 .poll = iodev_poll
59};
60
61static struct miscdevice miscdev =
62{
63 .minor = MISC_DYNAMIC_MINOR,
64 .name = iodev_name,
65 .fops = &fops
66};
67
68static struct platform_driver iodev_driver = {
69 .driver = {
70 .name = iodev_name,
71 .owner = THIS_MODULE,
72 },
73 .probe = iodev_probe,
74 .remove = __devexit_p(iodev_remove),
75};
76
77
78
79static const struct resource *
80iodev_get_resource(struct platform_device *pdv, const char *name,
81 unsigned int type)
82{
83 char buf[80];
84 if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
85 return NULL;
86 return platform_get_resource_byname(pdv, type, buf);
87}
88
89
90
91/* No hotplugging on the platform bus - use __init */
92static int __init iodev_probe(struct platform_device *dev)
93{
94 const struct resource * const ri =
95 iodev_get_resource(dev, IODEV_RESOURCE_IRQ, IORESOURCE_IRQ);
96
97 if (unlikely(!ri))
98 return -ENXIO;
99
100 iodev_irq = ri->start;
101 return misc_register(&miscdev);
102}
103
104
105
106static int __exit iodev_remove(struct platform_device *dev)
107{
108 return misc_deregister(&miscdev);
109}
110
111static int iodev_open(struct inode *i, struct file *f)
112{
113 int ret;
114
115 ret = request_irq(iodev_irq, iodev_irqhdl, IRQF_DISABLED,
116 iodev_name, &miscdev);
117
118 return ret;
119}
120
121static int iodev_release(struct inode *i, struct file *f)
122{
123 free_irq(iodev_irq, &miscdev);
124 return 0;
125}
126
127
128
129
130static ssize_t
131iodev_read(struct file *f, char __user *d, size_t s, loff_t *o)
132{
133 ssize_t ret;
134 DEFINE_WAIT(w);
135
136 prepare_to_wait(&wq, &w, TASK_INTERRUPTIBLE);
137 if (!signal_pending(current))
138 schedule();
139 ret = signal_pending(current) ? -ERESTARTSYS : 0;
140 finish_wait(&wq, &w);
141 return ret;
142}
143
144
145static unsigned int iodev_poll(struct file *f, struct poll_table_struct *p)
146{
147 poll_wait(f, &wq, p);
148 return POLLOUT | POLLWRNORM;
149}
150
151static irqreturn_t iodev_irqhdl(int irq, void *ctxt)
152{
153 wake_up(&wq);
154
155 return IRQ_HANDLED;
156}
157
158static int __init iodev_init_module(void)
159{
160 return platform_driver_register(&iodev_driver);
161}
162
163
164
165static void __exit iodev_cleanup_module(void)
166{
167 platform_driver_unregister(&iodev_driver);
168}
169
170module_init(iodev_init_module);
171module_exit(iodev_cleanup_module);
172
173
174
175MODULE_AUTHOR("Thomas Koeller <thomas.koeller@baslerweb.com>");
176MODULE_DESCRIPTION("Basler eXcite i/o interrupt handler");
177MODULE_VERSION("0.0");
178MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-07 17:45:10 -0500