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/config.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/sched.h>
18 #include <linux/smp_lock.h>
19 #include <linux/poll.h>
20 #include <linux/devfs_fs_kernel.h>
21 #include <asm/uaccess.h>
28 static char *main_revision = "$Revision: 1.32.6.10 $";
32 MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards");
33 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
34 MODULE_SUPPORTED_DEVICE("DIVA card driver");
35 MODULE_LICENSE("GPL");
37 static int buffer_length = 128;
38 module_param(buffer_length, int, 0);
39 static unsigned long diva_dbg_mem = 0;
40 module_param(diva_dbg_mem, ulong, 0);
42 static char *DRIVERNAME =
43 "Eicon DIVA - MAINT module (http://www.melware.net)";
44 static char *DRIVERLNAME = "diva_mnt";
45 static char *DEVNAME = "DivasMAINT";
46 char *DRIVERRELEASE_MNT = "2.0";
48 static wait_queue_head_t msgwaitq;
49 static unsigned long opened;
50 static struct timeval start_time;
52 extern int mntfunc_init(int *, void **, unsigned long);
53 extern void mntfunc_finit(void);
54 extern int maint_read_write(void __user *buf, int count);
59 static char *getrev(const char *revision)
64 if ((p = strchr(revision, ':'))) {
75 * kernel/user space copy functions
77 int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src,
80 return (copy_to_user(dst, src, length));
82 int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src,
85 return (copy_from_user(dst, src, length));
91 void diva_os_get_time(dword * sec, dword * usec)
97 if (tv.tv_sec > start_time.tv_sec) {
98 if (start_time.tv_usec > tv.tv_usec) {
100 tv.tv_usec += 1000000;
102 *sec = (dword) (tv.tv_sec - start_time.tv_sec);
103 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
104 } else if (tv.tv_sec == start_time.tv_sec) {
106 if (start_time.tv_usec < tv.tv_usec) {
107 *usec = (dword) (tv.tv_usec - start_time.tv_usec);
112 *sec = (dword) tv.tv_sec;
113 *usec = (dword) tv.tv_usec;
118 * device node operations
120 static unsigned int maint_poll(struct file *file, poll_table * wait)
122 unsigned int mask = 0;
124 poll_wait(file, &msgwaitq, wait);
125 mask = POLLOUT | POLLWRNORM;
126 if (file->private_data || diva_dbg_q_length()) {
127 mask |= POLLIN | POLLRDNORM;
132 static int maint_open(struct inode *ino, struct file *filep)
134 /* only one open is allowed, so we test
136 if (test_and_set_bit(0, &opened))
139 filep->private_data = NULL;
141 return nonseekable_open(ino, filep);
144 static int maint_close(struct inode *ino, struct file *filep)
146 if (filep->private_data) {
147 diva_os_free(0, filep->private_data);
148 filep->private_data = NULL;
151 /* clear 'used' flag */
152 clear_bit(0, &opened);
157 static ssize_t divas_maint_write(struct file *file, const char __user *buf,
158 size_t count, loff_t * ppos)
160 return (maint_read_write((char __user *) buf, (int) count));
163 static ssize_t divas_maint_read(struct file *file, char __user *buf,
164 size_t count, loff_t * ppos)
166 return (maint_read_write(buf, (int) count));
169 static struct file_operations divas_maint_fops = {
170 .owner = THIS_MODULE,
172 .read = divas_maint_read,
173 .write = divas_maint_write,
176 .release = maint_close
179 static void divas_maint_unregister_chrdev(void)
181 devfs_remove(DEVNAME);
182 unregister_chrdev(major, DEVNAME);
185 static int DIVA_INIT_FUNCTION divas_maint_register_chrdev(void)
187 if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0)
189 printk(KERN_ERR "%s: failed to create /dev entry.\n",
200 void diva_maint_wakeup_read(void)
202 wake_up_interruptible(&msgwaitq);
208 static int DIVA_INIT_FUNCTION maint_init(void)
214 do_gettimeofday(&start_time);
215 init_waitqueue_head(&msgwaitq);
217 printk(KERN_INFO "%s\n", DRIVERNAME);
218 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT);
219 strcpy(tmprev, main_revision);
220 printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD);
222 if (!divas_maint_register_chrdev()) {
227 if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) {
228 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
230 divas_maint_unregister_chrdev();
235 printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n",
236 DRIVERLNAME, buffer, (buffer_length / 1024),
237 (diva_dbg_mem == 0) ? "internal" : "external", major);
246 static void DIVA_EXIT_FUNCTION maint_exit(void)
248 divas_maint_unregister_chrdev();
251 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
254 module_init(maint_init);
255 module_exit(maint_exit);