1 /* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $
3 * CAPI 2.0 Interface for Linux
5 * Copyright 1996 by Carsten Paeth <calle@calle.de>
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
12 #include <linux/module.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/major.h>
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/fcntl.h>
20 #include <linux/signal.h>
21 #include <linux/mutex.h>
23 #include <linux/timer.h>
24 #include <linux/wait.h>
25 #include <linux/tty.h>
26 #include <linux/netdevice.h>
27 #include <linux/ppp_defs.h>
28 #include <linux/ppp-ioctl.h>
29 #include <linux/skbuff.h>
30 #include <linux/proc_fs.h>
31 #include <linux/seq_file.h>
32 #include <linux/poll.h>
33 #include <linux/capi.h>
34 #include <linux/kernelcapi.h>
35 #include <linux/init.h>
36 #include <linux/device.h>
37 #include <linux/moduleparam.h>
38 #include <linux/isdn/capiutil.h>
39 #include <linux/isdn/capicmd.h>
41 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
42 MODULE_AUTHOR("Carsten Paeth");
43 MODULE_LICENSE("GPL");
45 /* -------- driver information -------------------------------------- */
47 static DEFINE_MUTEX(capi_mutex);
48 static struct class *capi_class;
49 static int capi_major = 68; /* allocated */
51 module_param_named(major, capi_major, uint, 0);
53 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
54 #define CAPINC_NR_PORTS 32
55 #define CAPINC_MAX_PORTS 256
57 static int capi_ttyminors = CAPINC_NR_PORTS;
59 module_param_named(ttyminors, capi_ttyminors, uint, 0);
60 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
62 /* -------- defines ------------------------------------------------- */
64 #define CAPINC_MAX_RECVQUEUE 10
65 #define CAPINC_MAX_SENDQUEUE 10
66 #define CAPI_MAX_BLKSIZE 2048
68 /* -------- data structures ----------------------------------------- */
74 struct ackqueue_entry {
75 struct list_head list;
84 struct capi20_appl *ap;
93 struct sk_buff_head inqueue;
95 struct sk_buff_head outqueue;
97 struct sk_buff *outskb;
101 struct list_head ackqueue;
107 struct list_head list;
109 struct capidev *cdev;
110 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
111 struct capiminor *minorp;
112 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
116 struct list_head list;
117 struct capi20_appl ap;
121 struct sk_buff_head recvqueue;
122 wait_queue_head_t recvwait;
124 struct list_head nccis;
129 /* -------- global variables ---------------------------------------- */
131 static DEFINE_MUTEX(capidev_list_lock);
132 static LIST_HEAD(capidev_list);
134 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
136 static DEFINE_SPINLOCK(capiminors_lock);
137 static struct capiminor **capiminors;
139 static struct tty_driver *capinc_tty_driver;
141 /* -------- datahandles --------------------------------------------- */
143 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
145 struct ackqueue_entry *n;
147 n = kmalloc(sizeof(*n), GFP_ATOMIC);
149 printk(KERN_ERR "capi: alloc datahandle failed\n");
152 n->datahandle = datahandle;
153 INIT_LIST_HEAD(&n->list);
154 spin_lock_bh(&mp->ackqlock);
155 list_add_tail(&n->list, &mp->ackqueue);
157 spin_unlock_bh(&mp->ackqlock);
161 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
163 struct ackqueue_entry *p, *tmp;
165 spin_lock_bh(&mp->ackqlock);
166 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
167 if (p->datahandle == datahandle) {
170 spin_unlock_bh(&mp->ackqlock);
175 spin_unlock_bh(&mp->ackqlock);
179 static void capiminor_del_all_ack(struct capiminor *mp)
181 struct ackqueue_entry *p, *tmp;
183 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
191 /* -------- struct capiminor ---------------------------------------- */
193 static const struct tty_port_operations capiminor_port_ops; /* we have none */
195 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
197 struct capiminor *mp;
201 mp = kzalloc(sizeof(*mp), GFP_KERNEL);
203 printk(KERN_ERR "capi: can't alloc capiminor\n");
207 kref_init(&mp->kref);
211 INIT_LIST_HEAD(&mp->ackqueue);
212 spin_lock_init(&mp->ackqlock);
214 skb_queue_head_init(&mp->inqueue);
215 skb_queue_head_init(&mp->outqueue);
216 spin_lock_init(&mp->outlock);
218 tty_port_init(&mp->port);
219 mp->port.ops = &capiminor_port_ops;
221 /* Allocate the least unused minor number. */
222 spin_lock(&capiminors_lock);
223 for (minor = 0; minor < capi_ttyminors; minor++)
224 if (!capiminors[minor]) {
225 capiminors[minor] = mp;
228 spin_unlock(&capiminors_lock);
230 if (minor == capi_ttyminors) {
231 printk(KERN_NOTICE "capi: out of minors\n");
237 dev = tty_register_device(capinc_tty_driver, minor, NULL);
244 spin_lock(&capiminors_lock);
245 capiminors[minor] = NULL;
246 spin_unlock(&capiminors_lock);
253 static void capiminor_destroy(struct kref *kref)
255 struct capiminor *mp = container_of(kref, struct capiminor, kref);
257 kfree_skb(mp->outskb);
258 skb_queue_purge(&mp->inqueue);
259 skb_queue_purge(&mp->outqueue);
260 capiminor_del_all_ack(mp);
264 static struct capiminor *capiminor_get(unsigned int minor)
266 struct capiminor *mp;
268 spin_lock(&capiminors_lock);
269 mp = capiminors[minor];
272 spin_unlock(&capiminors_lock);
277 static inline void capiminor_put(struct capiminor *mp)
279 kref_put(&mp->kref, capiminor_destroy);
282 static void capiminor_free(struct capiminor *mp)
284 tty_unregister_device(capinc_tty_driver, mp->minor);
286 spin_lock(&capiminors_lock);
287 capiminors[mp->minor] = NULL;
288 spin_unlock(&capiminors_lock);
293 /* -------- struct capincci ----------------------------------------- */
295 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
297 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
298 np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
301 static void capincci_free_minor(struct capincci *np)
303 struct capiminor *mp = np->minorp;
304 struct tty_struct *tty;
307 tty = tty_port_tty_get(&mp->port);
317 static inline unsigned int capincci_minor_opencount(struct capincci *np)
319 struct capiminor *mp = np->minorp;
320 unsigned int count = 0;
321 struct tty_struct *tty;
324 tty = tty_port_tty_get(&mp->port);
333 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
336 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
337 static inline void capincci_free_minor(struct capincci *np) { }
339 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
341 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
345 np = kzalloc(sizeof(*np), GFP_KERNEL);
351 capincci_alloc_minor(cdev, np);
353 list_add_tail(&np->list, &cdev->nccis);
358 static void capincci_free(struct capidev *cdev, u32 ncci)
360 struct capincci *np, *tmp;
362 list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
363 if (ncci == 0xffffffff || np->ncci == ncci) {
364 capincci_free_minor(np);
370 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
371 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
375 list_for_each_entry(np, &cdev->nccis, list)
376 if (np->ncci == ncci)
381 /* -------- handle data queue --------------------------------------- */
383 static struct sk_buff *
384 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
386 struct sk_buff *nskb;
387 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL);
389 u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2);
390 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
391 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
392 capimsg_setu16(s, 2, mp->ap->applid);
393 capimsg_setu8 (s, 4, CAPI_DATA_B3);
394 capimsg_setu8 (s, 5, CAPI_RESP);
395 capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid));
396 capimsg_setu32(s, 8, mp->ncci);
397 capimsg_setu16(s, 12, datahandle);
402 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
404 unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data);
405 struct tty_struct *tty;
406 struct sk_buff *nskb;
407 u16 errcode, datahandle;
408 struct tty_ldisc *ld;
411 tty = tty_port_tty_get(&mp->port);
413 pr_debug("capi: currently no receiver\n");
417 ld = tty_ldisc_ref(tty);
419 /* fatal error, do not requeue */
425 if (ld->ops->receive_buf == NULL) {
426 pr_debug("capi: ldisc has no receive_buf function\n");
427 /* fatal error, do not requeue */
431 pr_debug("capi: recv tty throttled\n");
435 if (tty->receive_room < datalen) {
436 pr_debug("capi: no room in tty\n");
440 nskb = gen_data_b3_resp_for(mp, skb);
442 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
446 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
448 errcode = capi20_put_message(mp->ap, nskb);
450 if (errcode == CAPI_NOERROR) {
451 skb_pull(skb, CAPIMSG_LEN(skb->data));
452 pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n",
453 datahandle, skb->len);
454 ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
456 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
460 if (errcode == CAPI_SENDQUEUEFULL)
476 static void handle_minor_recv(struct capiminor *mp)
480 while ((skb = skb_dequeue(&mp->inqueue)) != NULL)
481 if (handle_recv_skb(mp, skb) < 0) {
482 skb_queue_head(&mp->inqueue, skb);
487 static void handle_minor_send(struct capiminor *mp)
489 struct tty_struct *tty;
495 tty = tty_port_tty_get(&mp->port);
499 if (mp->ttyoutstop) {
500 pr_debug("capi: send: tty stopped\n");
506 spin_lock_bh(&mp->outlock);
507 skb = __skb_dequeue(&mp->outqueue);
509 spin_unlock_bh(&mp->outlock);
514 spin_unlock_bh(&mp->outlock);
516 datahandle = atomic_inc_return(&mp->datahandle);
517 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
518 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
519 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
520 capimsg_setu16(skb->data, 2, mp->ap->applid);
521 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
522 capimsg_setu8 (skb->data, 5, CAPI_REQ);
523 capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid));
524 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
525 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
526 capimsg_setu16(skb->data, 16, len); /* Data length */
527 capimsg_setu16(skb->data, 18, datahandle);
528 capimsg_setu16(skb->data, 20, 0); /* Flags */
530 if (capiminor_add_ack(mp, datahandle) < 0) {
531 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
533 spin_lock_bh(&mp->outlock);
534 __skb_queue_head(&mp->outqueue, skb);
536 spin_unlock_bh(&mp->outlock);
540 errcode = capi20_put_message(mp->ap, skb);
541 if (errcode == CAPI_NOERROR) {
542 pr_debug("capi: DATA_B3_REQ %u len=%u\n",
546 capiminor_del_ack(mp, datahandle);
548 if (errcode == CAPI_SENDQUEUEFULL) {
549 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
551 spin_lock_bh(&mp->outlock);
552 __skb_queue_head(&mp->outqueue, skb);
554 spin_unlock_bh(&mp->outlock);
559 /* ups, drop packet */
560 printk(KERN_ERR "capi: put_message = %x\n", errcode);
566 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
567 /* -------- function called by lower level -------------------------- */
569 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
571 struct capidev *cdev = ap->private;
572 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
573 struct tty_struct *tty;
574 struct capiminor *mp;
577 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
579 mutex_lock(&cdev->lock);
581 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
582 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
583 if ((info & 0xff00) == 0)
584 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
586 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
587 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
589 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
590 skb_queue_tail(&cdev->recvqueue, skb);
591 wake_up_interruptible(&cdev->recvwait);
595 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
596 skb_queue_tail(&cdev->recvqueue, skb);
597 wake_up_interruptible(&cdev->recvwait);
599 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
601 np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
603 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
604 skb_queue_tail(&cdev->recvqueue, skb);
605 wake_up_interruptible(&cdev->recvwait);
611 skb_queue_tail(&cdev->recvqueue, skb);
612 wake_up_interruptible(&cdev->recvwait);
615 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
616 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2);
617 pr_debug("capi_signal: DATA_B3_IND %u len=%d\n",
618 datahandle, skb->len-CAPIMSG_LEN(skb->data));
619 skb_queue_tail(&mp->inqueue, skb);
621 handle_minor_recv(mp);
623 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
625 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
626 pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n",
628 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2));
630 capiminor_del_ack(mp, datahandle);
631 tty = tty_port_tty_get(&mp->port);
636 handle_minor_send(mp);
639 /* ups, let capi application handle it :-) */
640 skb_queue_tail(&cdev->recvqueue, skb);
641 wake_up_interruptible(&cdev->recvwait);
643 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
646 mutex_unlock(&cdev->lock);
649 /* -------- file_operations for capidev ----------------------------- */
652 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
654 struct capidev *cdev = file->private_data;
659 if (!cdev->ap.applid)
662 skb = skb_dequeue(&cdev->recvqueue);
664 if (file->f_flags & O_NONBLOCK)
666 err = wait_event_interruptible(cdev->recvwait,
667 (skb = skb_dequeue(&cdev->recvqueue)));
671 if (skb->len > count) {
672 skb_queue_head(&cdev->recvqueue, skb);
675 if (copy_to_user(buf, skb->data, skb->len)) {
676 skb_queue_head(&cdev->recvqueue, skb);
687 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
689 struct capidev *cdev = file->private_data;
693 if (!cdev->ap.applid)
696 skb = alloc_skb(count, GFP_USER);
700 if (copy_from_user(skb_put(skb, count), buf, count)) {
704 mlen = CAPIMSG_LEN(skb->data);
705 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
706 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
716 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
718 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
719 mutex_lock(&cdev->lock);
720 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
721 mutex_unlock(&cdev->lock);
724 cdev->errcode = capi20_put_message(&cdev->ap, skb);
734 capi_poll(struct file *file, poll_table *wait)
736 struct capidev *cdev = file->private_data;
737 unsigned int mask = 0;
739 if (!cdev->ap.applid)
742 poll_wait(file, &(cdev->recvwait), wait);
743 mask = POLLOUT | POLLWRNORM;
744 if (!skb_queue_empty(&cdev->recvqueue))
745 mask |= POLLIN | POLLRDNORM;
750 capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
752 struct capidev *cdev = file->private_data;
753 capi_ioctl_struct data;
754 int retval = -EINVAL;
755 void __user *argp = (void __user *)arg;
759 mutex_lock(&cdev->lock);
761 if (cdev->ap.applid) {
765 if (copy_from_user(&cdev->ap.rparam, argp,
766 sizeof(struct capi_register_params))) {
770 cdev->ap.private = cdev;
771 cdev->ap.recv_message = capi_recv_message;
772 cdev->errcode = capi20_register(&cdev->ap);
773 retval = (int)cdev->ap.applid;
780 mutex_unlock(&cdev->lock);
783 case CAPI_GET_VERSION:
784 if (copy_from_user(&data.contr, argp,
787 cdev->errcode = capi20_get_version(data.contr, &data.version);
790 if (copy_to_user(argp, &data.version,
791 sizeof(data.version)))
795 case CAPI_GET_SERIAL:
796 if (copy_from_user(&data.contr, argp,
799 cdev->errcode = capi20_get_serial(data.contr, data.serial);
802 if (copy_to_user(argp, data.serial,
803 sizeof(data.serial)))
807 case CAPI_GET_PROFILE:
808 if (copy_from_user(&data.contr, argp,
812 if (data.contr == 0) {
813 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
817 retval = copy_to_user(argp,
818 &data.profile.ncontroller,
819 sizeof(data.profile.ncontroller));
822 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
826 retval = copy_to_user(argp, &data.profile,
827 sizeof(data.profile));
833 case CAPI_GET_MANUFACTURER:
834 if (copy_from_user(&data.contr, argp,
837 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
841 if (copy_to_user(argp, data.manufacturer,
842 sizeof(data.manufacturer)))
847 case CAPI_GET_ERRCODE:
848 data.errcode = cdev->errcode;
849 cdev->errcode = CAPI_NOERROR;
851 if (copy_to_user(argp, &data.errcode,
852 sizeof(data.errcode)))
858 if (capi20_isinstalled() == CAPI_NOERROR)
862 case CAPI_MANUFACTURER_CMD: {
863 struct capi_manufacturer_cmd mcmd;
864 if (!capable(CAP_SYS_ADMIN))
866 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
868 return capi20_manufacturer(mcmd.cmd, mcmd.data);
871 case CAPI_CLR_FLAGS: {
874 if (copy_from_user(&userflags, argp, sizeof(userflags)))
877 mutex_lock(&cdev->lock);
878 if (cmd == CAPI_SET_FLAGS)
879 cdev->userflags |= userflags;
881 cdev->userflags &= ~userflags;
882 mutex_unlock(&cdev->lock);
886 if (copy_to_user(argp, &cdev->userflags,
887 sizeof(cdev->userflags)))
891 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
892 case CAPI_NCCI_OPENCOUNT:
895 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
896 case CAPI_NCCI_OPENCOUNT: {
897 struct capincci *nccip;
901 if (copy_from_user(&ncci, argp, sizeof(ncci)))
904 mutex_lock(&cdev->lock);
905 nccip = capincci_find(cdev, (u32)ncci);
907 count = capincci_minor_opencount(nccip);
908 mutex_unlock(&cdev->lock);
912 case CAPI_NCCI_GETUNIT: {
913 struct capincci *nccip;
914 struct capiminor *mp;
918 if (copy_from_user(&ncci, argp, sizeof(ncci)))
921 mutex_lock(&cdev->lock);
922 nccip = capincci_find(cdev, (u32)ncci);
928 mutex_unlock(&cdev->lock);
931 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
939 capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
943 mutex_lock(&capi_mutex);
944 ret = capi_ioctl(file, cmd, arg);
945 mutex_unlock(&capi_mutex);
950 static int capi_open(struct inode *inode, struct file *file)
952 struct capidev *cdev;
954 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
958 mutex_init(&cdev->lock);
959 skb_queue_head_init(&cdev->recvqueue);
960 init_waitqueue_head(&cdev->recvwait);
961 INIT_LIST_HEAD(&cdev->nccis);
962 file->private_data = cdev;
964 mutex_lock(&capidev_list_lock);
965 list_add_tail(&cdev->list, &capidev_list);
966 mutex_unlock(&capidev_list_lock);
968 return nonseekable_open(inode, file);
971 static int capi_release(struct inode *inode, struct file *file)
973 struct capidev *cdev = file->private_data;
975 mutex_lock(&capidev_list_lock);
976 list_del(&cdev->list);
977 mutex_unlock(&capidev_list_lock);
980 capi20_release(&cdev->ap);
981 skb_queue_purge(&cdev->recvqueue);
982 capincci_free(cdev, 0xffffffff);
988 static const struct file_operations capi_fops =
990 .owner = THIS_MODULE,
995 .unlocked_ioctl = capi_unlocked_ioctl,
997 .release = capi_release,
1000 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1001 /* -------- tty_operations for capincci ----------------------------- */
1004 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1006 struct capiminor *mp = capiminor_get(tty->index);
1007 int ret = tty_standard_install(driver, tty);
1010 tty->driver_data = mp;
1016 static void capinc_tty_cleanup(struct tty_struct *tty)
1018 struct capiminor *mp = tty->driver_data;
1019 tty->driver_data = NULL;
1023 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1025 struct capiminor *mp = tty->driver_data;
1028 err = tty_port_open(&mp->port, tty, filp);
1032 handle_minor_recv(mp);
1036 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1038 struct capiminor *mp = tty->driver_data;
1040 tty_port_close(&mp->port, tty, filp);
1043 static int capinc_tty_write(struct tty_struct *tty,
1044 const unsigned char *buf, int count)
1046 struct capiminor *mp = tty->driver_data;
1047 struct sk_buff *skb;
1049 pr_debug("capinc_tty_write(count=%d)\n", count);
1051 spin_lock_bh(&mp->outlock);
1055 __skb_queue_tail(&mp->outqueue, skb);
1056 mp->outbytes += skb->len;
1059 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC);
1061 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1062 spin_unlock_bh(&mp->outlock);
1066 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1067 memcpy(skb_put(skb, count), buf, count);
1069 __skb_queue_tail(&mp->outqueue, skb);
1070 mp->outbytes += skb->len;
1071 spin_unlock_bh(&mp->outlock);
1073 handle_minor_send(mp);
1078 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1080 struct capiminor *mp = tty->driver_data;
1081 bool invoke_send = false;
1082 struct sk_buff *skb;
1085 pr_debug("capinc_put_char(%u)\n", ch);
1087 spin_lock_bh(&mp->outlock);
1090 if (skb_tailroom(skb) > 0) {
1091 *(skb_put(skb, 1)) = ch;
1095 __skb_queue_tail(&mp->outqueue, skb);
1096 mp->outbytes += skb->len;
1100 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1102 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1103 *(skb_put(skb, 1)) = ch;
1106 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1111 spin_unlock_bh(&mp->outlock);
1114 handle_minor_send(mp);
1119 static void capinc_tty_flush_chars(struct tty_struct *tty)
1121 struct capiminor *mp = tty->driver_data;
1122 struct sk_buff *skb;
1124 pr_debug("capinc_tty_flush_chars\n");
1126 spin_lock_bh(&mp->outlock);
1130 __skb_queue_tail(&mp->outqueue, skb);
1131 mp->outbytes += skb->len;
1132 spin_unlock_bh(&mp->outlock);
1134 handle_minor_send(mp);
1136 spin_unlock_bh(&mp->outlock);
1138 handle_minor_recv(mp);
1141 static int capinc_tty_write_room(struct tty_struct *tty)
1143 struct capiminor *mp = tty->driver_data;
1146 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1147 room *= CAPI_MAX_BLKSIZE;
1148 pr_debug("capinc_tty_write_room = %d\n", room);
1152 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1154 struct capiminor *mp = tty->driver_data;
1156 pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1157 mp->outbytes, mp->nack,
1158 skb_queue_len(&mp->outqueue),
1159 skb_queue_len(&mp->inqueue));
1160 return mp->outbytes;
1163 static int capinc_tty_ioctl(struct tty_struct *tty,
1164 unsigned int cmd, unsigned long arg)
1166 return -ENOIOCTLCMD;
1169 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
1171 pr_debug("capinc_tty_set_termios\n");
1174 static void capinc_tty_throttle(struct tty_struct *tty)
1176 struct capiminor *mp = tty->driver_data;
1177 pr_debug("capinc_tty_throttle\n");
1181 static void capinc_tty_unthrottle(struct tty_struct *tty)
1183 struct capiminor *mp = tty->driver_data;
1185 pr_debug("capinc_tty_unthrottle\n");
1187 handle_minor_recv(mp);
1190 static void capinc_tty_stop(struct tty_struct *tty)
1192 struct capiminor *mp = tty->driver_data;
1194 pr_debug("capinc_tty_stop\n");
1198 static void capinc_tty_start(struct tty_struct *tty)
1200 struct capiminor *mp = tty->driver_data;
1202 pr_debug("capinc_tty_start\n");
1204 handle_minor_send(mp);
1207 static void capinc_tty_hangup(struct tty_struct *tty)
1209 struct capiminor *mp = tty->driver_data;
1211 pr_debug("capinc_tty_hangup\n");
1212 tty_port_hangup(&mp->port);
1215 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1217 pr_debug("capinc_tty_break_ctl(%d)\n", state);
1221 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1223 pr_debug("capinc_tty_flush_buffer\n");
1226 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1228 pr_debug("capinc_tty_set_ldisc\n");
1231 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1233 pr_debug("capinc_tty_send_xchar(%d)\n", ch);
1236 static const struct tty_operations capinc_ops = {
1237 .open = capinc_tty_open,
1238 .close = capinc_tty_close,
1239 .write = capinc_tty_write,
1240 .put_char = capinc_tty_put_char,
1241 .flush_chars = capinc_tty_flush_chars,
1242 .write_room = capinc_tty_write_room,
1243 .chars_in_buffer = capinc_tty_chars_in_buffer,
1244 .ioctl = capinc_tty_ioctl,
1245 .set_termios = capinc_tty_set_termios,
1246 .throttle = capinc_tty_throttle,
1247 .unthrottle = capinc_tty_unthrottle,
1248 .stop = capinc_tty_stop,
1249 .start = capinc_tty_start,
1250 .hangup = capinc_tty_hangup,
1251 .break_ctl = capinc_tty_break_ctl,
1252 .flush_buffer = capinc_tty_flush_buffer,
1253 .set_ldisc = capinc_tty_set_ldisc,
1254 .send_xchar = capinc_tty_send_xchar,
1255 .install = capinc_tty_install,
1256 .cleanup = capinc_tty_cleanup,
1259 static int __init capinc_tty_init(void)
1261 struct tty_driver *drv;
1264 if (capi_ttyminors > CAPINC_MAX_PORTS)
1265 capi_ttyminors = CAPINC_MAX_PORTS;
1266 if (capi_ttyminors <= 0)
1267 capi_ttyminors = CAPINC_NR_PORTS;
1269 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1274 drv = alloc_tty_driver(capi_ttyminors);
1279 drv->driver_name = "capi_nc";
1282 drv->minor_start = 0;
1283 drv->type = TTY_DRIVER_TYPE_SERIAL;
1284 drv->subtype = SERIAL_TYPE_NORMAL;
1285 drv->init_termios = tty_std_termios;
1286 drv->init_termios.c_iflag = ICRNL;
1287 drv->init_termios.c_oflag = OPOST | ONLCR;
1288 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1289 drv->init_termios.c_lflag = 0;
1291 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1292 TTY_DRIVER_DYNAMIC_DEV;
1293 tty_set_operations(drv, &capinc_ops);
1295 err = tty_register_driver(drv);
1297 put_tty_driver(drv);
1299 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1302 capinc_tty_driver = drv;
1306 static void __exit capinc_tty_exit(void)
1308 tty_unregister_driver(capinc_tty_driver);
1309 put_tty_driver(capinc_tty_driver);
1313 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1315 static inline int capinc_tty_init(void)
1320 static inline void capinc_tty_exit(void) { }
1322 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1324 /* -------- /proc functions ----------------------------------------- */
1327 * /proc/capi/capi20:
1328 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1330 static int capi20_proc_show(struct seq_file *m, void *v)
1332 struct capidev *cdev;
1333 struct list_head *l;
1335 mutex_lock(&capidev_list_lock);
1336 list_for_each(l, &capidev_list) {
1337 cdev = list_entry(l, struct capidev, list);
1338 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1340 cdev->ap.nrecvctlpkt,
1341 cdev->ap.nrecvdatapkt,
1342 cdev->ap.nsentctlpkt,
1343 cdev->ap.nsentdatapkt);
1345 mutex_unlock(&capidev_list_lock);
1349 static int capi20_proc_open(struct inode *inode, struct file *file)
1351 return single_open(file, capi20_proc_show, NULL);
1354 static const struct file_operations capi20_proc_fops = {
1355 .owner = THIS_MODULE,
1356 .open = capi20_proc_open,
1358 .llseek = seq_lseek,
1359 .release = single_release,
1363 * /proc/capi/capi20ncci:
1366 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1368 struct capidev *cdev;
1369 struct capincci *np;
1371 mutex_lock(&capidev_list_lock);
1372 list_for_each_entry(cdev, &capidev_list, list) {
1373 mutex_lock(&cdev->lock);
1374 list_for_each_entry(np, &cdev->nccis, list)
1375 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1376 mutex_unlock(&cdev->lock);
1378 mutex_unlock(&capidev_list_lock);
1382 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1384 return single_open(file, capi20ncci_proc_show, NULL);
1387 static const struct file_operations capi20ncci_proc_fops = {
1388 .owner = THIS_MODULE,
1389 .open = capi20ncci_proc_open,
1391 .llseek = seq_lseek,
1392 .release = single_release,
1395 static void __init proc_init(void)
1397 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1398 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1401 static void __exit proc_exit(void)
1403 remove_proc_entry("capi/capi20", NULL);
1404 remove_proc_entry("capi/capi20ncci", NULL);
1407 /* -------- init function and module interface ---------------------- */
1410 static int __init capi_init(void)
1412 const char *compileinfo;
1415 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1416 if (major_ret < 0) {
1417 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1420 capi_class = class_create(THIS_MODULE, "capi");
1421 if (IS_ERR(capi_class)) {
1422 unregister_chrdev(capi_major, "capi20");
1423 return PTR_ERR(capi_class);
1426 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1428 if (capinc_tty_init() < 0) {
1429 device_destroy(capi_class, MKDEV(capi_major, 0));
1430 class_destroy(capi_class);
1431 unregister_chrdev(capi_major, "capi20");
1437 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1438 compileinfo = " (middleware)";
1440 compileinfo = " (no middleware)";
1442 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1443 capi_major, compileinfo);
1448 static void __exit capi_exit(void)
1452 device_destroy(capi_class, MKDEV(capi_major, 0));
1453 class_destroy(capi_class);
1454 unregister_chrdev(capi_major, "capi20");
1459 module_init(capi_init);
1460 module_exit(capi_exit);