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/seq_file.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;
89 static int um_idi_proc_show(struct seq_file *m, void *v)
93 seq_printf(m, "%s\n", DRIVERNAME);
94 seq_printf(m, "name : %s\n", DRIVERLNAME);
95 seq_printf(m, "release : %s\n", DRIVERRELEASE_IDI);
96 strcpy(tmprev, main_revision);
97 seq_printf(m, "revision : %s\n", getrev(tmprev));
98 seq_printf(m, "build : %s\n", DIVA_BUILD);
99 seq_printf(m, "major : %d\n", major);
104 static int um_idi_proc_open(struct inode *inode, struct file *file)
106 return single_open(file, um_idi_proc_show, NULL);
109 static const struct file_operations um_idi_proc_fops = {
110 .owner = THIS_MODULE,
111 .open = um_idi_proc_open,
114 .release = single_release,
117 static int __init create_um_idi_proc(void)
119 um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
121 if (!um_idi_proc_entry)
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 __init 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 __init 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 __exit 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)
408 static int um_idi_release(struct inode *inode, struct file *file)
410 diva_um_idi_os_context_t *p_os;
411 unsigned int adapter_nr;
414 if (!(file->private_data)) {
420 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
425 adapter_nr = p_os->adapter_nr;
427 if ((ret = remove_entity(file->private_data))) {
431 if (divas_um_idi_delete_entity
432 ((int) adapter_nr, file->private_data)) {
441 int diva_os_get_context_size(void)
443 return (sizeof(diva_um_idi_os_context_t));
446 void diva_os_wakeup_read(void *os_context)
448 diva_um_idi_os_context_t *p_os =
449 (diva_um_idi_os_context_t *) os_context;
450 wake_up_interruptible(&p_os->read_wait);
453 void diva_os_wakeup_close(void *os_context)
455 diva_um_idi_os_context_t *p_os =
456 (diva_um_idi_os_context_t *) os_context;
457 wake_up_interruptible(&p_os->close_wait);
461 void diva_um_timer_function(unsigned long data)
463 diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data;
466 wake_up_interruptible(&p_os->read_wait);
467 wake_up_interruptible(&p_os->close_wait);
468 DBG_ERR(("entity removal watchdog"))
472 ** If application exits without entity removal this function will remove
473 ** entity and block until removal is complete
475 static int remove_entity(void *entity)
477 struct task_struct *curtask = current;
478 diva_um_idi_os_context_t *p_os;
480 diva_um_idi_stop_wdog(entity);
483 DBG_FTL(("Zero entity on remove"))
488 (diva_um_idi_os_context_t *)
489 diva_um_id_get_os_context(entity))) {
490 DBG_FTL(("Zero entity os context on remove"))
494 if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
496 Entity is not assigned, also can be removed
501 DBG_TRC(("E(%08x) check remove", entity))
504 If adapter not answers on remove request inside of
505 10 Sec, then adapter is dead
507 diva_um_idi_start_wdog(entity);
510 DECLARE_WAITQUEUE(wait, curtask);
512 add_wait_queue(&p_os->close_wait, &wait);
514 set_current_state(TASK_INTERRUPTIBLE);
515 if (!divas_um_idi_entity_start_remove(entity)
521 set_current_state(TASK_RUNNING);
522 remove_wait_queue(&p_os->close_wait, &wait);
525 DBG_TRC(("E(%08x) start remove", entity))
527 DECLARE_WAITQUEUE(wait, curtask);
529 add_wait_queue(&p_os->close_wait, &wait);
531 set_current_state(TASK_INTERRUPTIBLE);
532 if (!divas_um_idi_entity_assigned(entity)
538 set_current_state(TASK_RUNNING);
539 remove_wait_queue(&p_os->close_wait, &wait);
542 DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
545 diva_um_idi_stop_wdog(entity);
555 void diva_um_idi_start_wdog(void *entity)
557 diva_um_idi_os_context_t *p_os;
561 (diva_um_idi_os_context_t *)
562 diva_um_id_get_os_context(entity)))) {
563 mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
567 void diva_um_idi_stop_wdog(void *entity)
569 diva_um_idi_os_context_t *p_os;
573 (diva_um_idi_os_context_t *)
574 diva_um_id_get_os_context(entity)))) {
575 del_timer(&p_os->diva_timer_id);