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 <asm/uaccess.h>
28 static char *main_revision = "$Revision: 1.25.6.2 $";
32 MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards");
33 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
34 MODULE_SUPPORTED_DEVICE("DIVA card driver");
35 MODULE_LICENSE("GPL");
37 typedef struct _diva_um_idi_os_context {
38 wait_queue_head_t read_wait;
39 wait_queue_head_t close_wait;
40 struct timer_list diva_timer_id;
43 } diva_um_idi_os_context_t;
45 static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)";
46 static char *DRIVERLNAME = "diva_idi";
47 static char *DEVNAME = "DivasIDI";
48 char *DRIVERRELEASE_IDI = "2.0";
50 extern int idifunc_init(void);
51 extern void idifunc_finit(void);
56 static char *getrev(const char *revision)
60 if ((p = strchr(revision, ':'))) {
72 static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count,
74 static ssize_t um_idi_write(struct file *file, const char __user *buf,
75 size_t count, loff_t * offset);
76 static unsigned int um_idi_poll(struct file *file, poll_table * wait);
77 static int um_idi_open(struct inode *inode, struct file *file);
78 static int um_idi_release(struct inode *inode, struct file *file);
79 static int remove_entity(void *entity);
80 static void diva_um_timer_function(unsigned long data);
85 extern struct proc_dir_entry *proc_net_eicon;
86 static struct proc_dir_entry *um_idi_proc_entry = NULL;
89 um_idi_proc_read(char *page, char **start, off_t off, int count, int *eof,
95 len += sprintf(page + len, "%s\n", DRIVERNAME);
96 len += sprintf(page + len, "name : %s\n", DRIVERLNAME);
97 len += sprintf(page + len, "release : %s\n", DRIVERRELEASE_IDI);
98 strcpy(tmprev, main_revision);
99 len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
100 len += sprintf(page + len, "build : %s\n", DIVA_BUILD);
101 len += sprintf(page + len, "major : %d\n", major);
103 if (off + count >= len)
108 return ((count < len - off) ? count : len - off);
111 static int DIVA_INIT_FUNCTION create_um_idi_proc(void)
113 um_idi_proc_entry = create_proc_entry(DRIVERLNAME,
114 S_IFREG | S_IRUGO | S_IWUSR,
116 if (!um_idi_proc_entry)
119 um_idi_proc_entry->read_proc = um_idi_proc_read;
120 um_idi_proc_entry->owner = THIS_MODULE;
125 static void remove_um_idi_proc(void)
127 if (um_idi_proc_entry) {
128 remove_proc_entry(DRIVERLNAME, proc_net_eicon);
129 um_idi_proc_entry = NULL;
133 static const struct file_operations divas_idi_fops = {
134 .owner = THIS_MODULE,
137 .write = um_idi_write,
140 .release = um_idi_release
143 static void divas_idi_unregister_chrdev(void)
145 unregister_chrdev(major, DEVNAME);
148 static int DIVA_INIT_FUNCTION divas_idi_register_chrdev(void)
150 if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0)
152 printk(KERN_ERR "%s: failed to create /dev entry.\n",
163 static int DIVA_INIT_FUNCTION divasi_init(void)
168 printk(KERN_INFO "%s\n", DRIVERNAME);
169 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI);
170 strcpy(tmprev, main_revision);
171 printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD);
173 if (!divas_idi_register_chrdev()) {
178 if (!create_um_idi_proc()) {
179 divas_idi_unregister_chrdev();
180 printk(KERN_ERR "%s: failed to create proc entry.\n",
186 if (!(idifunc_init())) {
187 remove_um_idi_proc();
188 divas_idi_unregister_chrdev();
189 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
194 printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
204 static void DIVA_EXIT_FUNCTION divasi_exit(void)
207 remove_um_idi_proc();
208 divas_idi_unregister_chrdev();
210 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
213 module_init(divasi_init);
214 module_exit(divasi_exit);
222 divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src,
225 memcpy(dst, src, length);
230 um_idi_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
232 diva_um_idi_os_context_t *p_os;
236 if (!file->private_data) {
242 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
251 if (!(data = diva_os_malloc(0, count))) {
255 ret = diva_um_idi_read(file->private_data,
257 divas_um_idi_copy_to_user);
259 case 0: /* no message available */
262 case (-1): /* adapter was removed */
265 case (-2): /* message_length > length of user buffer */
271 if (copy_to_user(buf, data, ret)) {
276 diva_os_free(0, data);
277 DBG_TRC(("read: ret %d", ret));
283 divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src,
286 memcpy(dst, src, length);
290 static int um_idi_open_adapter(struct file *file, int adapter_nr)
292 diva_um_idi_os_context_t *p_os;
294 divas_um_idi_create_entity((dword) adapter_nr, (void *) file);
296 if (!(file->private_data = e)) {
299 p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e);
300 init_waitqueue_head(&p_os->read_wait);
301 init_waitqueue_head(&p_os->close_wait);
302 init_timer(&p_os->diva_timer_id);
303 p_os->diva_timer_id.function = (void *) diva_um_timer_function;
304 p_os->diva_timer_id.data = (unsigned long) p_os;
306 p_os->adapter_nr = adapter_nr;
311 um_idi_write(struct file *file, const char __user *buf, size_t count,
314 diva_um_idi_os_context_t *p_os;
319 if (!file->private_data) {
320 /* the first write() selects the adapter_nr */
321 if (count == sizeof(int)) {
323 ((void *) &adapter_nr, buf,
324 count)) return (-EFAULT);
325 if (!(um_idi_open_adapter(file, adapter_nr)))
333 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
342 if (!(data = diva_os_malloc(0, count))) {
346 if (copy_from_user(data, buf, count)) {
349 ret = diva_um_idi_write(file->private_data,
351 divas_um_idi_copy_from_user);
353 case 0: /* no space available */
356 case (-1): /* adapter was removed */
359 case (-2): /* length of user buffer > max message_length */
364 diva_os_free(0, data);
365 DBG_TRC(("write: ret %d", ret));
369 static unsigned int um_idi_poll(struct file *file, poll_table * wait)
371 diva_um_idi_os_context_t *p_os;
373 if (!file->private_data) {
378 (diva_um_idi_os_context_t *)
379 diva_um_id_get_os_context(file->private_data)))
384 poll_wait(file, &p_os->read_wait, wait);
390 switch (diva_user_mode_idi_ind_ready(file->private_data, file)) {
398 return (POLLIN | POLLRDNORM);
401 static int um_idi_open(struct inode *inode, struct file *file)
407 static int um_idi_release(struct inode *inode, struct file *file)
409 diva_um_idi_os_context_t *p_os;
410 unsigned int adapter_nr;
413 if (!(file->private_data)) {
419 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
424 adapter_nr = p_os->adapter_nr;
426 if ((ret = remove_entity(file->private_data))) {
430 if (divas_um_idi_delete_entity
431 ((int) adapter_nr, file->private_data)) {
440 int diva_os_get_context_size(void)
442 return (sizeof(diva_um_idi_os_context_t));
445 void diva_os_wakeup_read(void *os_context)
447 diva_um_idi_os_context_t *p_os =
448 (diva_um_idi_os_context_t *) os_context;
449 wake_up_interruptible(&p_os->read_wait);
452 void diva_os_wakeup_close(void *os_context)
454 diva_um_idi_os_context_t *p_os =
455 (diva_um_idi_os_context_t *) os_context;
456 wake_up_interruptible(&p_os->close_wait);
460 void diva_um_timer_function(unsigned long data)
462 diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data;
465 wake_up_interruptible(&p_os->read_wait);
466 wake_up_interruptible(&p_os->close_wait);
467 DBG_ERR(("entity removal watchdog"))
471 ** If application exits without entity removal this function will remove
472 ** entity and block until removal is complete
474 static int remove_entity(void *entity)
476 struct task_struct *curtask = current;
477 diva_um_idi_os_context_t *p_os;
479 diva_um_idi_stop_wdog(entity);
482 DBG_FTL(("Zero entity on remove"))
487 (diva_um_idi_os_context_t *)
488 diva_um_id_get_os_context(entity))) {
489 DBG_FTL(("Zero entity os context on remove"))
493 if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
495 Entity is not assigned, also can be removed
500 DBG_TRC(("E(%08x) check remove", entity))
503 If adapter not answers on remove request inside of
504 10 Sec, then adapter is dead
506 diva_um_idi_start_wdog(entity);
509 DECLARE_WAITQUEUE(wait, curtask);
511 add_wait_queue(&p_os->close_wait, &wait);
513 set_current_state(TASK_INTERRUPTIBLE);
514 if (!divas_um_idi_entity_start_remove(entity)
520 set_current_state(TASK_RUNNING);
521 remove_wait_queue(&p_os->close_wait, &wait);
524 DBG_TRC(("E(%08x) start remove", entity))
526 DECLARE_WAITQUEUE(wait, curtask);
528 add_wait_queue(&p_os->close_wait, &wait);
530 set_current_state(TASK_INTERRUPTIBLE);
531 if (!divas_um_idi_entity_assigned(entity)
537 set_current_state(TASK_RUNNING);
538 remove_wait_queue(&p_os->close_wait, &wait);
541 DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
544 diva_um_idi_stop_wdog(entity);
554 void diva_um_idi_start_wdog(void *entity)
556 diva_um_idi_os_context_t *p_os;
560 (diva_um_idi_os_context_t *)
561 diva_um_id_get_os_context(entity)))) {
562 mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
566 void diva_um_idi_stop_wdog(void *entity)
568 diva_um_idi_os_context_t *p_os;
572 (diva_um_idi_os_context_t *)
573 diva_um_id_get_os_context(entity)))) {
574 del_timer(&p_os->diva_timer_id);