1 /* $Id: divamnt.c,v 1.32.6.10 2005/02/11 19:40:25 armin Exp $
3 * Driver for Eicon DIVA Server ISDN cards.
6 * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
7 * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/poll.h>
17 #include <linux/mutex.h>
18 #include <asm/uaccess.h>
25 static DEFINE_MUTEX(maint_mutex);
26 static char *main_revision = "$Revision: 1.32.6.10 $";
30 MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards");
31 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
32 MODULE_SUPPORTED_DEVICE("DIVA card driver");
33 MODULE_LICENSE("GPL");
35 static int buffer_length = 128;
36 module_param(buffer_length, int, 0);
37 static unsigned long diva_dbg_mem = 0;
38 module_param(diva_dbg_mem, ulong, 0);
40 static char *DRIVERNAME =
41 "Eicon DIVA - MAINT module (http://www.melware.net)";
42 static char *DRIVERLNAME = "diva_mnt";
43 static char *DEVNAME = "DivasMAINT";
44 char *DRIVERRELEASE_MNT = "2.0";
46 static wait_queue_head_t msgwaitq;
47 static unsigned long opened;
48 static struct timeval start_time;
50 extern int mntfunc_init(int *, void **, unsigned long);
51 extern void mntfunc_finit(void);
52 extern int maint_read_write(void __user *buf, int count);
57 static char *getrev(const char *revision)
62 if ((p = strchr(revision, ':'))) {
73 * kernel/user space copy functions
75 int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src,
78 return (copy_to_user(dst, src, length));
80 int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src,
83 return (copy_from_user(dst, src, length));
89 void diva_os_get_time(dword *sec, dword *usec)
95 if (tv.tv_sec > start_time.tv_sec) {
96 if (start_time.tv_usec > tv.tv_usec) {
98 tv.tv_usec += 1000000;
100 *sec = (dword) (tv.tv_sec - start_time.tv_sec);
101 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
102 } else if (tv.tv_sec == start_time.tv_sec) {
104 if (start_time.tv_usec < tv.tv_usec) {
105 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
110 *sec = (dword) tv.tv_sec;
111 *usec = (dword) tv.tv_usec;
116 * device node operations
118 static unsigned int maint_poll(struct file *file, poll_table *wait)
120 unsigned int mask = 0;
122 poll_wait(file, &msgwaitq, wait);
123 mask = POLLOUT | POLLWRNORM;
124 if (file->private_data || diva_dbg_q_length()) {
125 mask |= POLLIN | POLLRDNORM;
130 static int maint_open(struct inode *ino, struct file *filep)
134 mutex_lock(&maint_mutex);
135 /* only one open is allowed, so we test
137 if (test_and_set_bit(0, &opened))
140 filep->private_data = NULL;
141 ret = nonseekable_open(ino, filep);
143 mutex_unlock(&maint_mutex);
147 static int maint_close(struct inode *ino, struct file *filep)
149 if (filep->private_data) {
150 diva_os_free(0, filep->private_data);
151 filep->private_data = NULL;
154 /* clear 'used' flag */
155 clear_bit(0, &opened);
160 static ssize_t divas_maint_write(struct file *file, const char __user *buf,
161 size_t count, loff_t *ppos)
163 return (maint_read_write((char __user *) buf, (int) count));
166 static ssize_t divas_maint_read(struct file *file, char __user *buf,
167 size_t count, loff_t *ppos)
169 return (maint_read_write(buf, (int) count));
172 static const struct file_operations divas_maint_fops = {
173 .owner = THIS_MODULE,
175 .read = divas_maint_read,
176 .write = divas_maint_write,
179 .release = maint_close
182 static void divas_maint_unregister_chrdev(void)
184 unregister_chrdev(major, DEVNAME);
187 static int __init divas_maint_register_chrdev(void)
189 if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0)
191 printk(KERN_ERR "%s: failed to create /dev entry.\n",
202 void diva_maint_wakeup_read(void)
204 wake_up_interruptible(&msgwaitq);
210 static int __init maint_init(void)
216 do_gettimeofday(&start_time);
217 init_waitqueue_head(&msgwaitq);
219 printk(KERN_INFO "%s\n", DRIVERNAME);
220 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT);
221 strcpy(tmprev, main_revision);
222 printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD);
224 if (!divas_maint_register_chrdev()) {
229 if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) {
230 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
232 divas_maint_unregister_chrdev();
237 printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n",
238 DRIVERLNAME, buffer, (buffer_length / 1024),
239 (diva_dbg_mem == 0) ? "internal" : "external", major);
248 static void __exit maint_exit(void)
250 divas_maint_unregister_chrdev();
253 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
256 module_init(maint_init);
257 module_exit(maint_exit);