1 /* $Id: divasi.c,v 1.25.6.2 2005/01/31 12:22:20 armin Exp $
3 * Driver for Eicon DIVA Server ISDN cards.
4 * User Mode IDI Interface
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/sched.h>
17 #include <linux/poll.h>
18 #include <linux/proc_fs.h>
19 #include <linux/skbuff.h>
20 #include <linux/smp_lock.h>
21 #include <asm/uaccess.h>
29 static char *main_revision = "$Revision: 1.25.6.2 $";
33 MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards");
34 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
35 MODULE_SUPPORTED_DEVICE("DIVA card driver");
36 MODULE_LICENSE("GPL");
38 typedef struct _diva_um_idi_os_context {
39 wait_queue_head_t read_wait;
40 wait_queue_head_t close_wait;
41 struct timer_list diva_timer_id;
44 } diva_um_idi_os_context_t;
46 static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)";
47 static char *DRIVERLNAME = "diva_idi";
48 static char *DEVNAME = "DivasIDI";
49 char *DRIVERRELEASE_IDI = "2.0";
51 extern int idifunc_init(void);
52 extern void idifunc_finit(void);
57 static char *getrev(const char *revision)
61 if ((p = strchr(revision, ':'))) {
73 static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count,
75 static ssize_t um_idi_write(struct file *file, const char __user *buf,
76 size_t count, loff_t * offset);
77 static unsigned int um_idi_poll(struct file *file, poll_table * wait);
78 static int um_idi_open(struct inode *inode, struct file *file);
79 static int um_idi_release(struct inode *inode, struct file *file);
80 static int remove_entity(void *entity);
81 static void diva_um_timer_function(unsigned long data);
86 extern struct proc_dir_entry *proc_net_eicon;
87 static struct proc_dir_entry *um_idi_proc_entry = NULL;
90 um_idi_proc_read(char *page, char **start, off_t off, int count, int *eof,
96 len += sprintf(page + len, "%s\n", DRIVERNAME);
97 len += sprintf(page + len, "name : %s\n", DRIVERLNAME);
98 len += sprintf(page + len, "release : %s\n", DRIVERRELEASE_IDI);
99 strcpy(tmprev, main_revision);
100 len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
101 len += sprintf(page + len, "build : %s\n", DIVA_BUILD);
102 len += sprintf(page + len, "major : %d\n", major);
104 if (off + count >= len)
109 return ((count < len - off) ? count : len - off);
112 static int DIVA_INIT_FUNCTION create_um_idi_proc(void)
114 um_idi_proc_entry = create_proc_entry(DRIVERLNAME,
115 S_IFREG | S_IRUGO | S_IWUSR,
117 if (!um_idi_proc_entry)
120 um_idi_proc_entry->read_proc = um_idi_proc_read;
121 um_idi_proc_entry->owner = THIS_MODULE;
126 static void remove_um_idi_proc(void)
128 if (um_idi_proc_entry) {
129 remove_proc_entry(DRIVERLNAME, proc_net_eicon);
130 um_idi_proc_entry = NULL;
134 static const struct file_operations divas_idi_fops = {
135 .owner = THIS_MODULE,
138 .write = um_idi_write,
141 .release = um_idi_release
144 static void divas_idi_unregister_chrdev(void)
146 unregister_chrdev(major, DEVNAME);
149 static int DIVA_INIT_FUNCTION divas_idi_register_chrdev(void)
151 if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0)
153 printk(KERN_ERR "%s: failed to create /dev entry.\n",
164 static int DIVA_INIT_FUNCTION divasi_init(void)
169 printk(KERN_INFO "%s\n", DRIVERNAME);
170 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI);
171 strcpy(tmprev, main_revision);
172 printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD);
174 if (!divas_idi_register_chrdev()) {
179 if (!create_um_idi_proc()) {
180 divas_idi_unregister_chrdev();
181 printk(KERN_ERR "%s: failed to create proc entry.\n",
187 if (!(idifunc_init())) {
188 remove_um_idi_proc();
189 divas_idi_unregister_chrdev();
190 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
195 printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
205 static void DIVA_EXIT_FUNCTION divasi_exit(void)
208 remove_um_idi_proc();
209 divas_idi_unregister_chrdev();
211 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
214 module_init(divasi_init);
215 module_exit(divasi_exit);
223 divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src,
226 memcpy(dst, src, length);
231 um_idi_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
233 diva_um_idi_os_context_t *p_os;
237 if (!file->private_data) {
243 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
252 if (!(data = diva_os_malloc(0, count))) {
256 ret = diva_um_idi_read(file->private_data,
258 divas_um_idi_copy_to_user);
260 case 0: /* no message available */
263 case (-1): /* adapter was removed */
266 case (-2): /* message_length > length of user buffer */
272 if (copy_to_user(buf, data, ret)) {
277 diva_os_free(0, data);
278 DBG_TRC(("read: ret %d", ret));
284 divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src,
287 memcpy(dst, src, length);
291 static int um_idi_open_adapter(struct file *file, int adapter_nr)
293 diva_um_idi_os_context_t *p_os;
295 divas_um_idi_create_entity((dword) adapter_nr, (void *) file);
297 if (!(file->private_data = e)) {
300 p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e);
301 init_waitqueue_head(&p_os->read_wait);
302 init_waitqueue_head(&p_os->close_wait);
303 init_timer(&p_os->diva_timer_id);
304 p_os->diva_timer_id.function = (void *) diva_um_timer_function;
305 p_os->diva_timer_id.data = (unsigned long) p_os;
307 p_os->adapter_nr = adapter_nr;
312 um_idi_write(struct file *file, const char __user *buf, size_t count,
315 diva_um_idi_os_context_t *p_os;
320 if (!file->private_data) {
321 /* the first write() selects the adapter_nr */
322 if (count == sizeof(int)) {
324 ((void *) &adapter_nr, buf,
325 count)) return (-EFAULT);
326 if (!(um_idi_open_adapter(file, adapter_nr)))
334 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
343 if (!(data = diva_os_malloc(0, count))) {
347 if (copy_from_user(data, buf, count)) {
350 ret = diva_um_idi_write(file->private_data,
352 divas_um_idi_copy_from_user);
354 case 0: /* no space available */
357 case (-1): /* adapter was removed */
360 case (-2): /* length of user buffer > max message_length */
365 diva_os_free(0, data);
366 DBG_TRC(("write: ret %d", ret));
370 static unsigned int um_idi_poll(struct file *file, poll_table * wait)
372 diva_um_idi_os_context_t *p_os;
374 if (!file->private_data) {
379 (diva_um_idi_os_context_t *)
380 diva_um_id_get_os_context(file->private_data)))
385 poll_wait(file, &p_os->read_wait, wait);
391 switch (diva_user_mode_idi_ind_ready(file->private_data, file)) {
399 return (POLLIN | POLLRDNORM);
402 static int um_idi_open(struct inode *inode, struct file *file)
409 static int um_idi_release(struct inode *inode, struct file *file)
411 diva_um_idi_os_context_t *p_os;
412 unsigned int adapter_nr;
415 if (!(file->private_data)) {
421 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
426 adapter_nr = p_os->adapter_nr;
428 if ((ret = remove_entity(file->private_data))) {
432 if (divas_um_idi_delete_entity
433 ((int) adapter_nr, file->private_data)) {
442 int diva_os_get_context_size(void)
444 return (sizeof(diva_um_idi_os_context_t));
447 void diva_os_wakeup_read(void *os_context)
449 diva_um_idi_os_context_t *p_os =
450 (diva_um_idi_os_context_t *) os_context;
451 wake_up_interruptible(&p_os->read_wait);
454 void diva_os_wakeup_close(void *os_context)
456 diva_um_idi_os_context_t *p_os =
457 (diva_um_idi_os_context_t *) os_context;
458 wake_up_interruptible(&p_os->close_wait);
462 void diva_um_timer_function(unsigned long data)
464 diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data;
467 wake_up_interruptible(&p_os->read_wait);
468 wake_up_interruptible(&p_os->close_wait);
469 DBG_ERR(("entity removal watchdog"))
473 ** If application exits without entity removal this function will remove
474 ** entity and block until removal is complete
476 static int remove_entity(void *entity)
478 struct task_struct *curtask = current;
479 diva_um_idi_os_context_t *p_os;
481 diva_um_idi_stop_wdog(entity);
484 DBG_FTL(("Zero entity on remove"))
489 (diva_um_idi_os_context_t *)
490 diva_um_id_get_os_context(entity))) {
491 DBG_FTL(("Zero entity os context on remove"))
495 if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
497 Entity is not assigned, also can be removed
502 DBG_TRC(("E(%08x) check remove", entity))
505 If adapter not answers on remove request inside of
506 10 Sec, then adapter is dead
508 diva_um_idi_start_wdog(entity);
511 DECLARE_WAITQUEUE(wait, curtask);
513 add_wait_queue(&p_os->close_wait, &wait);
515 set_current_state(TASK_INTERRUPTIBLE);
516 if (!divas_um_idi_entity_start_remove(entity)
522 set_current_state(TASK_RUNNING);
523 remove_wait_queue(&p_os->close_wait, &wait);
526 DBG_TRC(("E(%08x) start remove", entity))
528 DECLARE_WAITQUEUE(wait, curtask);
530 add_wait_queue(&p_os->close_wait, &wait);
532 set_current_state(TASK_INTERRUPTIBLE);
533 if (!divas_um_idi_entity_assigned(entity)
539 set_current_state(TASK_RUNNING);
540 remove_wait_queue(&p_os->close_wait, &wait);
543 DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
546 diva_um_idi_stop_wdog(entity);
556 void diva_um_idi_start_wdog(void *entity)
558 diva_um_idi_os_context_t *p_os;
562 (diva_um_idi_os_context_t *)
563 diva_um_id_get_os_context(entity)))) {
564 mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
568 void diva_um_idi_stop_wdog(void *entity)
570 diva_um_idi_os_context_t *p_os;
574 (diva_um_idi_os_context_t *)
575 diva_um_id_get_os_context(entity)))) {
576 del_timer(&p_os->diva_timer_id);