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 <linux/smp_lock.h>
22 #include <asm/uaccess.h>
30 static char *main_revision = "$Revision: 1.25.6.2 $";
34 MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards");
35 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
36 MODULE_SUPPORTED_DEVICE("DIVA card driver");
37 MODULE_LICENSE("GPL");
39 typedef struct _diva_um_idi_os_context {
40 wait_queue_head_t read_wait;
41 wait_queue_head_t close_wait;
42 struct timer_list diva_timer_id;
45 } diva_um_idi_os_context_t;
47 static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)";
48 static char *DRIVERLNAME = "diva_idi";
49 static char *DEVNAME = "DivasIDI";
50 char *DRIVERRELEASE_IDI = "2.0";
52 extern int idifunc_init(void);
53 extern void idifunc_finit(void);
58 static char *getrev(const char *revision)
62 if ((p = strchr(revision, ':'))) {
74 static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count,
76 static ssize_t um_idi_write(struct file *file, const char __user *buf,
77 size_t count, loff_t * offset);
78 static unsigned int um_idi_poll(struct file *file, poll_table * wait);
79 static int um_idi_open(struct inode *inode, struct file *file);
80 static int um_idi_release(struct inode *inode, struct file *file);
81 static int remove_entity(void *entity);
82 static void diva_um_timer_function(unsigned long data);
87 extern struct proc_dir_entry *proc_net_eicon;
88 static struct proc_dir_entry *um_idi_proc_entry = NULL;
90 static int um_idi_proc_show(struct seq_file *m, void *v)
94 seq_printf(m, "%s\n", DRIVERNAME);
95 seq_printf(m, "name : %s\n", DRIVERLNAME);
96 seq_printf(m, "release : %s\n", DRIVERRELEASE_IDI);
97 strcpy(tmprev, main_revision);
98 seq_printf(m, "revision : %s\n", getrev(tmprev));
99 seq_printf(m, "build : %s\n", DIVA_BUILD);
100 seq_printf(m, "major : %d\n", major);
105 static int um_idi_proc_open(struct inode *inode, struct file *file)
107 return single_open(file, um_idi_proc_show, NULL);
110 static const struct file_operations um_idi_proc_fops = {
111 .owner = THIS_MODULE,
112 .open = um_idi_proc_open,
115 .release = single_release,
118 static int DIVA_INIT_FUNCTION create_um_idi_proc(void)
120 um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
122 if (!um_idi_proc_entry)
127 static void remove_um_idi_proc(void)
129 if (um_idi_proc_entry) {
130 remove_proc_entry(DRIVERLNAME, proc_net_eicon);
131 um_idi_proc_entry = NULL;
135 static const struct file_operations divas_idi_fops = {
136 .owner = THIS_MODULE,
139 .write = um_idi_write,
142 .release = um_idi_release
145 static void divas_idi_unregister_chrdev(void)
147 unregister_chrdev(major, DEVNAME);
150 static int DIVA_INIT_FUNCTION divas_idi_register_chrdev(void)
152 if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0)
154 printk(KERN_ERR "%s: failed to create /dev entry.\n",
165 static int DIVA_INIT_FUNCTION divasi_init(void)
170 printk(KERN_INFO "%s\n", DRIVERNAME);
171 printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI);
172 strcpy(tmprev, main_revision);
173 printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD);
175 if (!divas_idi_register_chrdev()) {
180 if (!create_um_idi_proc()) {
181 divas_idi_unregister_chrdev();
182 printk(KERN_ERR "%s: failed to create proc entry.\n",
188 if (!(idifunc_init())) {
189 remove_um_idi_proc();
190 divas_idi_unregister_chrdev();
191 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
196 printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
206 static void DIVA_EXIT_FUNCTION divasi_exit(void)
209 remove_um_idi_proc();
210 divas_idi_unregister_chrdev();
212 printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
215 module_init(divasi_init);
216 module_exit(divasi_exit);
224 divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src,
227 memcpy(dst, src, length);
232 um_idi_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
234 diva_um_idi_os_context_t *p_os;
238 if (!file->private_data) {
244 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
253 if (!(data = diva_os_malloc(0, count))) {
257 ret = diva_um_idi_read(file->private_data,
259 divas_um_idi_copy_to_user);
261 case 0: /* no message available */
264 case (-1): /* adapter was removed */
267 case (-2): /* message_length > length of user buffer */
273 if (copy_to_user(buf, data, ret)) {
278 diva_os_free(0, data);
279 DBG_TRC(("read: ret %d", ret));
285 divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src,
288 memcpy(dst, src, length);
292 static int um_idi_open_adapter(struct file *file, int adapter_nr)
294 diva_um_idi_os_context_t *p_os;
296 divas_um_idi_create_entity((dword) adapter_nr, (void *) file);
298 if (!(file->private_data = e)) {
301 p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e);
302 init_waitqueue_head(&p_os->read_wait);
303 init_waitqueue_head(&p_os->close_wait);
304 init_timer(&p_os->diva_timer_id);
305 p_os->diva_timer_id.function = (void *) diva_um_timer_function;
306 p_os->diva_timer_id.data = (unsigned long) p_os;
308 p_os->adapter_nr = adapter_nr;
313 um_idi_write(struct file *file, const char __user *buf, size_t count,
316 diva_um_idi_os_context_t *p_os;
321 if (!file->private_data) {
322 /* the first write() selects the adapter_nr */
323 if (count == sizeof(int)) {
325 ((void *) &adapter_nr, buf,
326 count)) return (-EFAULT);
327 if (!(um_idi_open_adapter(file, adapter_nr)))
335 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
344 if (!(data = diva_os_malloc(0, count))) {
348 if (copy_from_user(data, buf, count)) {
351 ret = diva_um_idi_write(file->private_data,
353 divas_um_idi_copy_from_user);
355 case 0: /* no space available */
358 case (-1): /* adapter was removed */
361 case (-2): /* length of user buffer > max message_length */
366 diva_os_free(0, data);
367 DBG_TRC(("write: ret %d", ret));
371 static unsigned int um_idi_poll(struct file *file, poll_table * wait)
373 diva_um_idi_os_context_t *p_os;
375 if (!file->private_data) {
380 (diva_um_idi_os_context_t *)
381 diva_um_id_get_os_context(file->private_data)))
386 poll_wait(file, &p_os->read_wait, wait);
392 switch (diva_user_mode_idi_ind_ready(file->private_data, file)) {
400 return (POLLIN | POLLRDNORM);
403 static int um_idi_open(struct inode *inode, struct file *file)
410 static int um_idi_release(struct inode *inode, struct file *file)
412 diva_um_idi_os_context_t *p_os;
413 unsigned int adapter_nr;
416 if (!(file->private_data)) {
422 (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
427 adapter_nr = p_os->adapter_nr;
429 if ((ret = remove_entity(file->private_data))) {
433 if (divas_um_idi_delete_entity
434 ((int) adapter_nr, file->private_data)) {
443 int diva_os_get_context_size(void)
445 return (sizeof(diva_um_idi_os_context_t));
448 void diva_os_wakeup_read(void *os_context)
450 diva_um_idi_os_context_t *p_os =
451 (diva_um_idi_os_context_t *) os_context;
452 wake_up_interruptible(&p_os->read_wait);
455 void diva_os_wakeup_close(void *os_context)
457 diva_um_idi_os_context_t *p_os =
458 (diva_um_idi_os_context_t *) os_context;
459 wake_up_interruptible(&p_os->close_wait);
463 void diva_um_timer_function(unsigned long data)
465 diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data;
468 wake_up_interruptible(&p_os->read_wait);
469 wake_up_interruptible(&p_os->close_wait);
470 DBG_ERR(("entity removal watchdog"))
474 ** If application exits without entity removal this function will remove
475 ** entity and block until removal is complete
477 static int remove_entity(void *entity)
479 struct task_struct *curtask = current;
480 diva_um_idi_os_context_t *p_os;
482 diva_um_idi_stop_wdog(entity);
485 DBG_FTL(("Zero entity on remove"))
490 (diva_um_idi_os_context_t *)
491 diva_um_id_get_os_context(entity))) {
492 DBG_FTL(("Zero entity os context on remove"))
496 if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
498 Entity is not assigned, also can be removed
503 DBG_TRC(("E(%08x) check remove", entity))
506 If adapter not answers on remove request inside of
507 10 Sec, then adapter is dead
509 diva_um_idi_start_wdog(entity);
512 DECLARE_WAITQUEUE(wait, curtask);
514 add_wait_queue(&p_os->close_wait, &wait);
516 set_current_state(TASK_INTERRUPTIBLE);
517 if (!divas_um_idi_entity_start_remove(entity)
523 set_current_state(TASK_RUNNING);
524 remove_wait_queue(&p_os->close_wait, &wait);
527 DBG_TRC(("E(%08x) start remove", entity))
529 DECLARE_WAITQUEUE(wait, curtask);
531 add_wait_queue(&p_os->close_wait, &wait);
533 set_current_state(TASK_INTERRUPTIBLE);
534 if (!divas_um_idi_entity_assigned(entity)
540 set_current_state(TASK_RUNNING);
541 remove_wait_queue(&p_os->close_wait, &wait);
544 DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
547 diva_um_idi_stop_wdog(entity);
557 void diva_um_idi_start_wdog(void *entity)
559 diva_um_idi_os_context_t *p_os;
563 (diva_um_idi_os_context_t *)
564 diva_um_id_get_os_context(entity)))) {
565 mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
569 void diva_um_idi_stop_wdog(void *entity)
571 diva_um_idi_os_context_t *p_os;
575 (diva_um_idi_os_context_t *)
576 diva_um_id_get_os_context(entity)))) {
577 del_timer(&p_os->diva_timer_id);