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/smp_lock.h>
17 #include <linux/poll.h>
18 #include <asm/uaccess.h>
25 static char *main_revision = "$Revision: 1.32.6.10 $";
29 MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards");
30 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
31 MODULE_SUPPORTED_DEVICE("DIVA card driver");
32 MODULE_LICENSE("GPL");
34 static int buffer_length = 128;
35 module_param(buffer_length, int, 0);
36 static unsigned long diva_dbg_mem = 0;
37 module_param(diva_dbg_mem, ulong, 0);
39 static char *DRIVERNAME =
40 "Eicon DIVA - MAINT module (http://www.melware.net)";
41 static char *DRIVERLNAME = "diva_mnt";
42 static char *DEVNAME = "DivasMAINT";
43 char *DRIVERRELEASE_MNT = "2.0";
45 static wait_queue_head_t msgwaitq;
46 static unsigned long opened;
47 static struct timeval start_time;
49 extern int mntfunc_init(int *, void **, unsigned long);
50 extern void mntfunc_finit(void);
51 extern int maint_read_write(void __user *buf, int count);
56 static char *getrev(const char *revision)
61 if ((p = strchr(revision, ':'))) {
72 * kernel/user space copy functions
74 int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src,
77 return (copy_to_user(dst, src, length));
79 int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src,
82 return (copy_from_user(dst, src, length));
88 void diva_os_get_time(dword * sec, dword * usec)
94 if (tv.tv_sec > start_time.tv_sec) {
95 if (start_time.tv_usec > tv.tv_usec) {
97 tv.tv_usec += 1000000;
99 *sec = (dword) (tv.tv_sec - start_time.tv_sec);
100 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
101 } else if (tv.tv_sec == start_time.tv_sec) {
103 if (start_time.tv_usec < tv.tv_usec) {
104 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
109 *sec = (dword) tv.tv_sec;
110 *usec = (dword) tv.tv_usec;
115 * device node operations
117 static unsigned int maint_poll(struct file *file, poll_table * wait)
119 unsigned int mask = 0;
121 poll_wait(file, &msgwaitq, wait);
122 mask = POLLOUT | POLLWRNORM;
123 if (file->private_data || diva_dbg_q_length()) {
124 mask |= POLLIN | POLLRDNORM;
129 static int maint_open(struct inode *ino, struct file *filep)
131 /* only one open is allowed, so we test
133 if (test_and_set_bit(0, &opened))
136 filep->private_data = NULL;
138 return nonseekable_open(ino, filep);
141 static int maint_close(struct inode *ino, struct file *filep)
143 if (filep->private_data) {
144 diva_os_free(0, filep->private_data);
145 filep->private_data = NULL;
148 /* clear 'used' flag */
149 clear_bit(0, &opened);
154 static ssize_t divas_maint_write(struct file *file, const char __user *buf,
155 size_t count, loff_t * ppos)
157 return (maint_read_write((char __user *) buf, (int) count));
160 static ssize_t divas_maint_read(struct file *file, char __user *buf,
161 size_t count, loff_t * ppos)
163 return (maint_read_write(buf, (int) count));
166 static const struct file_operations divas_maint_fops = {
167 .owner = THIS_MODULE,
169 .read = divas_maint_read,
170 .write = divas_maint_write,
173 .release = maint_close
176 static void divas_maint_unregister_chrdev(void)
178 unregister_chrdev(major, DEVNAME);
181 static int DIVA_INIT_FUNCTION divas_maint_register_chrdev(void)
183 if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0)
185 printk(KERN_ERR "%s: failed to create /dev entry.\n",
196 void diva_maint_wakeup_read(void)
198 wake_up_interruptible(&msgwaitq);
204 static int DIVA_INIT_FUNCTION maint_init(void)
210 do_gettimeofday(&start_time);
211 init_waitqueue_head(&msgwaitq);
213 printk(KERN_INFO "%s\n", DRIVERNAME);
214 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT);
215 strcpy(tmprev, main_revision);
216 printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD);
218 if (!divas_maint_register_chrdev()) {
223 if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) {
224 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
226 divas_maint_unregister_chrdev();
231 printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n",
232 DRIVERLNAME, buffer, (buffer_length / 1024),
233 (diva_dbg_mem == 0) ? "internal" : "external", major);
242 static void DIVA_EXIT_FUNCTION maint_exit(void)
244 divas_maint_unregister_chrdev();
247 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
250 module_init(maint_init);
251 module_exit(maint_exit);