1555 lines
36 KiB
C
1555 lines
36 KiB
C
/* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $
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*
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* CAPI 2.0 Interface for Linux
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*
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* Copyright 1996 by Carsten Paeth <calle@calle.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/fcntl.h>
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#include <linux/fs.h>
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#include <linux/signal.h>
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#include <linux/mm.h>
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#include <linux/smp_lock.h>
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#include <linux/timer.h>
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#include <linux/wait.h>
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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#include <linux/tty.h>
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#ifdef CONFIG_PPP
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#include <linux/netdevice.h>
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#include <linux/ppp_defs.h>
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#include <linux/if_ppp.h>
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#endif /* CONFIG_PPP */
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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#include <linux/skbuff.h>
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#include <linux/proc_fs.h>
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#include <linux/poll.h>
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#include <linux/capi.h>
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#include <linux/kernelcapi.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/moduleparam.h>
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#include <linux/devfs_fs_kernel.h>
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#include <linux/isdn/capiutil.h>
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#include <linux/isdn/capicmd.h>
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#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
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#include "capifs.h"
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#endif
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static char *revision = "$Revision: 1.1.2.7 $";
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MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
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MODULE_AUTHOR("Carsten Paeth");
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MODULE_LICENSE("GPL");
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#undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
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#undef _DEBUG_TTYFUNCS /* call to tty_driver */
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#undef _DEBUG_DATAFLOW /* data flow */
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/* -------- driver information -------------------------------------- */
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static struct class *capi_class;
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static int capi_major = 68; /* allocated */
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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#define CAPINC_NR_PORTS 32
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#define CAPINC_MAX_PORTS 256
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static int capi_ttymajor = 191;
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static int capi_ttyminors = CAPINC_NR_PORTS;
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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module_param_named(major, capi_major, uint, 0);
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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module_param_named(ttymajor, capi_ttymajor, uint, 0);
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module_param_named(ttyminors, capi_ttyminors, uint, 0);
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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/* -------- defines ------------------------------------------------- */
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#define CAPINC_MAX_RECVQUEUE 10
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#define CAPINC_MAX_SENDQUEUE 10
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#define CAPI_MAX_BLKSIZE 2048
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/* -------- data structures ----------------------------------------- */
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struct capidev;
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struct capincci;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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struct capiminor;
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struct capiminor {
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struct list_head list;
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struct capincci *nccip;
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unsigned int minor;
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struct capi20_appl *ap;
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u32 ncci;
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u16 datahandle;
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u16 msgid;
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struct tty_struct *tty;
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int ttyinstop;
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int ttyoutstop;
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struct sk_buff *ttyskb;
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atomic_t ttyopencount;
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struct sk_buff_head inqueue;
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int inbytes;
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struct sk_buff_head outqueue;
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int outbytes;
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/* transmit path */
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struct datahandle_queue {
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struct datahandle_queue *next;
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u16 datahandle;
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} *ackqueue;
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int nack;
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};
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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struct capincci {
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struct capincci *next;
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u32 ncci;
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struct capidev *cdev;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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struct capiminor *minorp;
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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};
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struct capidev {
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struct list_head list;
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struct capi20_appl ap;
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u16 errcode;
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unsigned userflags;
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struct sk_buff_head recvqueue;
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wait_queue_head_t recvwait;
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struct capincci *nccis;
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struct semaphore ncci_list_sem;
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};
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/* -------- global variables ---------------------------------------- */
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static DEFINE_RWLOCK(capidev_list_lock);
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static LIST_HEAD(capidev_list);
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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static DEFINE_RWLOCK(capiminor_list_lock);
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static LIST_HEAD(capiminor_list);
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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/* -------- datahandles --------------------------------------------- */
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static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
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{
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struct datahandle_queue *n, **pp;
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n = kmalloc(sizeof(*n), GFP_ATOMIC);
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if (!n) {
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printk(KERN_ERR "capi: alloc datahandle failed\n");
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return -1;
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}
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n->next = NULL;
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n->datahandle = datahandle;
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for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) ;
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*pp = n;
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mp->nack++;
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return 0;
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}
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static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
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{
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struct datahandle_queue **pp, *p;
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for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) {
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if ((*pp)->datahandle == datahandle) {
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p = *pp;
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*pp = (*pp)->next;
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kfree(p);
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mp->nack--;
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return 0;
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}
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}
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return -1;
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}
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static void capiminor_del_all_ack(struct capiminor *mp)
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{
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struct datahandle_queue **pp, *p;
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pp = &mp->ackqueue;
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while (*pp) {
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p = *pp;
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*pp = (*pp)->next;
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kfree(p);
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mp->nack--;
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}
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}
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/* -------- struct capiminor ---------------------------------------- */
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static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
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{
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struct capiminor *mp, *p;
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unsigned int minor = 0;
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unsigned long flags;
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mp = kmalloc(sizeof(*mp), GFP_ATOMIC);
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if (!mp) {
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printk(KERN_ERR "capi: can't alloc capiminor\n");
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return NULL;
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}
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memset(mp, 0, sizeof(struct capiminor));
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mp->ap = ap;
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mp->ncci = ncci;
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mp->msgid = 0;
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atomic_set(&mp->ttyopencount,0);
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skb_queue_head_init(&mp->inqueue);
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skb_queue_head_init(&mp->outqueue);
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/* Allocate the least unused minor number.
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*/
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write_lock_irqsave(&capiminor_list_lock, flags);
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if (list_empty(&capiminor_list))
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list_add(&mp->list, &capiminor_list);
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else {
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list_for_each_entry(p, &capiminor_list, list) {
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if (p->minor > minor)
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break;
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minor++;
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}
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if (minor < capi_ttyminors) {
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mp->minor = minor;
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list_add(&mp->list, p->list.prev);
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}
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}
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write_unlock_irqrestore(&capiminor_list_lock, flags);
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if (!(minor < capi_ttyminors)) {
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printk(KERN_NOTICE "capi: out of minors\n");
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kfree(mp);
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return NULL;
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}
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return mp;
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}
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static void capiminor_free(struct capiminor *mp)
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{
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unsigned long flags;
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write_lock_irqsave(&capiminor_list_lock, flags);
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list_del(&mp->list);
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write_unlock_irqrestore(&capiminor_list_lock, flags);
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if (mp->ttyskb) kfree_skb(mp->ttyskb);
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mp->ttyskb = NULL;
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skb_queue_purge(&mp->inqueue);
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skb_queue_purge(&mp->outqueue);
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capiminor_del_all_ack(mp);
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kfree(mp);
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}
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static struct capiminor *capiminor_find(unsigned int minor)
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{
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struct list_head *l;
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struct capiminor *p = NULL;
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read_lock(&capiminor_list_lock);
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list_for_each(l, &capiminor_list) {
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p = list_entry(l, struct capiminor, list);
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if (p->minor == minor)
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break;
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}
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read_unlock(&capiminor_list_lock);
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if (l == &capiminor_list)
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return NULL;
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return p;
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}
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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/* -------- struct capincci ----------------------------------------- */
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static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
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{
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struct capincci *np, **pp;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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struct capiminor *mp = NULL;
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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np = kmalloc(sizeof(*np), GFP_ATOMIC);
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if (!np)
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return NULL;
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memset(np, 0, sizeof(struct capincci));
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np->ncci = ncci;
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np->cdev = cdev;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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mp = NULL;
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if (cdev->userflags & CAPIFLAG_HIGHJACKING)
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mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
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if (mp) {
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mp->nccip = np;
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#ifdef _DEBUG_REFCOUNT
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printk(KERN_DEBUG "set mp->nccip\n");
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#endif
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#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
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capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
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#endif
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}
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
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;
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*pp = np;
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return np;
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}
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static void capincci_free(struct capidev *cdev, u32 ncci)
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{
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struct capincci *np, **pp;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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struct capiminor *mp;
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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pp=&cdev->nccis;
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while (*pp) {
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np = *pp;
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if (ncci == 0xffffffff || np->ncci == ncci) {
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*pp = (*pp)->next;
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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if ((mp = np->minorp) != 0) {
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#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
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capifs_free_ncci(mp->minor);
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#endif
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if (mp->tty) {
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mp->nccip = NULL;
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#ifdef _DEBUG_REFCOUNT
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printk(KERN_DEBUG "reset mp->nccip\n");
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#endif
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tty_hangup(mp->tty);
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} else {
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capiminor_free(mp);
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}
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}
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#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
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kfree(np);
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if (*pp == 0) return;
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} else {
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pp = &(*pp)->next;
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}
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}
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}
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static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
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{
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struct capincci *p;
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for (p=cdev->nccis; p ; p = p->next) {
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if (p->ncci == ncci)
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break;
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}
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return p;
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}
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/* -------- struct capidev ------------------------------------------ */
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static struct capidev *capidev_alloc(void)
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{
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struct capidev *cdev;
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unsigned long flags;
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cdev = kmalloc(sizeof(*cdev), GFP_KERNEL);
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if (!cdev)
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return NULL;
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memset(cdev, 0, sizeof(struct capidev));
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init_MUTEX(&cdev->ncci_list_sem);
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skb_queue_head_init(&cdev->recvqueue);
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init_waitqueue_head(&cdev->recvwait);
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write_lock_irqsave(&capidev_list_lock, flags);
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list_add_tail(&cdev->list, &capidev_list);
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write_unlock_irqrestore(&capidev_list_lock, flags);
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return cdev;
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}
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static void capidev_free(struct capidev *cdev)
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{
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unsigned long flags;
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if (cdev->ap.applid) {
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capi20_release(&cdev->ap);
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cdev->ap.applid = 0;
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}
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skb_queue_purge(&cdev->recvqueue);
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down(&cdev->ncci_list_sem);
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capincci_free(cdev, 0xffffffff);
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up(&cdev->ncci_list_sem);
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write_lock_irqsave(&capidev_list_lock, flags);
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list_del(&cdev->list);
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write_unlock_irqrestore(&capidev_list_lock, flags);
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kfree(cdev);
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}
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#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
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/* -------- handle data queue --------------------------------------- */
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static struct sk_buff *
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gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
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{
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struct sk_buff *nskb;
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nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
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if (nskb) {
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u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
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unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
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capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
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capimsg_setu16(s, 2, mp->ap->applid);
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capimsg_setu8 (s, 4, CAPI_DATA_B3);
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capimsg_setu8 (s, 5, CAPI_RESP);
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capimsg_setu16(s, 6, mp->msgid++);
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capimsg_setu32(s, 8, mp->ncci);
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capimsg_setu16(s, 12, datahandle);
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}
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return nskb;
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}
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static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
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{
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struct sk_buff *nskb;
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int datalen;
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u16 errcode, datahandle;
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struct tty_ldisc *ld;
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datalen = skb->len - CAPIMSG_LEN(skb->data);
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if (mp->tty == NULL)
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{
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#ifdef _DEBUG_DATAFLOW
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printk(KERN_DEBUG "capi: currently no receiver\n");
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#endif
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return -1;
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}
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ld = tty_ldisc_ref(mp->tty);
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if (ld == NULL)
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return -1;
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if (ld->receive_buf == NULL) {
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#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
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printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
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#endif
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goto bad;
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}
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if (mp->ttyinstop) {
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#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
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printk(KERN_DEBUG "capi: recv tty throttled\n");
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#endif
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goto bad;
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}
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if (ld->receive_room &&
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ld->receive_room(mp->tty) < datalen) {
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#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
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printk(KERN_DEBUG "capi: no room in tty\n");
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#endif
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goto bad;
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}
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if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
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printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
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goto bad;
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}
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datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
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errcode = capi20_put_message(mp->ap, nskb);
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if (errcode != CAPI_NOERROR) {
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printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
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errcode);
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kfree_skb(nskb);
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goto bad;
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}
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(void)skb_pull(skb, CAPIMSG_LEN(skb->data));
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#ifdef _DEBUG_DATAFLOW
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printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
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datahandle, skb->len);
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#endif
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ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
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kfree_skb(skb);
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tty_ldisc_deref(ld);
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return 0;
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bad:
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tty_ldisc_deref(ld);
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return -1;
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}
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static void handle_minor_recv(struct capiminor *mp)
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{
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struct sk_buff *skb;
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while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
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unsigned int len = skb->len;
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mp->inbytes -= len;
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if (handle_recv_skb(mp, skb) < 0) {
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skb_queue_head(&mp->inqueue, skb);
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mp->inbytes += len;
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return;
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}
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}
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|
}
|
|
|
|
static int handle_minor_send(struct capiminor *mp)
|
|
{
|
|
struct sk_buff *skb;
|
|
u16 len;
|
|
int count = 0;
|
|
u16 errcode;
|
|
u16 datahandle;
|
|
|
|
if (mp->tty && mp->ttyoutstop) {
|
|
#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
|
|
printk(KERN_DEBUG "capi: send: tty stopped\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
|
|
datahandle = mp->datahandle;
|
|
len = (u16)skb->len;
|
|
skb_push(skb, CAPI_DATA_B3_REQ_LEN);
|
|
memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
|
|
capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
|
|
capimsg_setu16(skb->data, 2, mp->ap->applid);
|
|
capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
|
|
capimsg_setu8 (skb->data, 5, CAPI_REQ);
|
|
capimsg_setu16(skb->data, 6, mp->msgid++);
|
|
capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
|
|
capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
|
|
capimsg_setu16(skb->data, 16, len); /* Data length */
|
|
capimsg_setu16(skb->data, 18, datahandle);
|
|
capimsg_setu16(skb->data, 20, 0); /* Flags */
|
|
|
|
if (capincci_add_ack(mp, datahandle) < 0) {
|
|
skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
|
|
skb_queue_head(&mp->outqueue, skb);
|
|
return count;
|
|
}
|
|
errcode = capi20_put_message(mp->ap, skb);
|
|
if (errcode == CAPI_NOERROR) {
|
|
mp->datahandle++;
|
|
count++;
|
|
mp->outbytes -= len;
|
|
#ifdef _DEBUG_DATAFLOW
|
|
printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
|
|
datahandle, len);
|
|
#endif
|
|
continue;
|
|
}
|
|
capiminor_del_ack(mp, datahandle);
|
|
|
|
if (errcode == CAPI_SENDQUEUEFULL) {
|
|
skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
|
|
skb_queue_head(&mp->outqueue, skb);
|
|
break;
|
|
}
|
|
|
|
/* ups, drop packet */
|
|
printk(KERN_ERR "capi: put_message = %x\n", errcode);
|
|
mp->outbytes -= len;
|
|
kfree_skb(skb);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
/* -------- function called by lower level -------------------------- */
|
|
|
|
static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
|
|
{
|
|
struct capidev *cdev = ap->private;
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
struct capiminor *mp;
|
|
u16 datahandle;
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
struct capincci *np;
|
|
u32 ncci;
|
|
|
|
if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
|
|
u16 info = CAPIMSG_U16(skb->data, 12); // Info field
|
|
if (info == 0) {
|
|
down(&cdev->ncci_list_sem);
|
|
capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
|
|
up(&cdev->ncci_list_sem);
|
|
}
|
|
}
|
|
if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
|
|
down(&cdev->ncci_list_sem);
|
|
capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
|
|
up(&cdev->ncci_list_sem);
|
|
}
|
|
if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
|
|
skb_queue_tail(&cdev->recvqueue, skb);
|
|
wake_up_interruptible(&cdev->recvwait);
|
|
return;
|
|
}
|
|
ncci = CAPIMSG_CONTROL(skb->data);
|
|
for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
|
|
;
|
|
if (!np) {
|
|
printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
|
|
skb_queue_tail(&cdev->recvqueue, skb);
|
|
wake_up_interruptible(&cdev->recvwait);
|
|
return;
|
|
}
|
|
#ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
skb_queue_tail(&cdev->recvqueue, skb);
|
|
wake_up_interruptible(&cdev->recvwait);
|
|
#else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
mp = np->minorp;
|
|
if (!mp) {
|
|
skb_queue_tail(&cdev->recvqueue, skb);
|
|
wake_up_interruptible(&cdev->recvwait);
|
|
return;
|
|
}
|
|
|
|
|
|
if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
|
|
|
|
datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
|
|
#ifdef _DEBUG_DATAFLOW
|
|
printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
|
|
datahandle, skb->len-CAPIMSG_LEN(skb->data));
|
|
#endif
|
|
skb_queue_tail(&mp->inqueue, skb);
|
|
mp->inbytes += skb->len;
|
|
handle_minor_recv(mp);
|
|
|
|
} else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
|
|
|
|
datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
|
|
#ifdef _DEBUG_DATAFLOW
|
|
printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
|
|
datahandle,
|
|
CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
|
|
#endif
|
|
kfree_skb(skb);
|
|
(void)capiminor_del_ack(mp, datahandle);
|
|
if (mp->tty)
|
|
tty_wakeup(mp->tty);
|
|
(void)handle_minor_send(mp);
|
|
|
|
} else {
|
|
/* ups, let capi application handle it :-) */
|
|
skb_queue_tail(&cdev->recvqueue, skb);
|
|
wake_up_interruptible(&cdev->recvwait);
|
|
}
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
}
|
|
|
|
/* -------- file_operations for capidev ----------------------------- */
|
|
|
|
static ssize_t
|
|
capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
|
|
{
|
|
struct capidev *cdev = (struct capidev *)file->private_data;
|
|
struct sk_buff *skb;
|
|
size_t copied;
|
|
|
|
if (!cdev->ap.applid)
|
|
return -ENODEV;
|
|
|
|
if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
|
|
|
|
if (file->f_flags & O_NONBLOCK)
|
|
return -EAGAIN;
|
|
|
|
for (;;) {
|
|
interruptible_sleep_on(&cdev->recvwait);
|
|
if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
|
|
break;
|
|
if (signal_pending(current))
|
|
break;
|
|
}
|
|
if (skb == 0)
|
|
return -ERESTARTNOHAND;
|
|
}
|
|
if (skb->len > count) {
|
|
skb_queue_head(&cdev->recvqueue, skb);
|
|
return -EMSGSIZE;
|
|
}
|
|
if (copy_to_user(buf, skb->data, skb->len)) {
|
|
skb_queue_head(&cdev->recvqueue, skb);
|
|
return -EFAULT;
|
|
}
|
|
copied = skb->len;
|
|
|
|
kfree_skb(skb);
|
|
|
|
return copied;
|
|
}
|
|
|
|
static ssize_t
|
|
capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
|
|
{
|
|
struct capidev *cdev = (struct capidev *)file->private_data;
|
|
struct sk_buff *skb;
|
|
u16 mlen;
|
|
|
|
if (!cdev->ap.applid)
|
|
return -ENODEV;
|
|
|
|
skb = alloc_skb(count, GFP_USER);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(skb_put(skb, count), buf, count)) {
|
|
kfree_skb(skb);
|
|
return -EFAULT;
|
|
}
|
|
mlen = CAPIMSG_LEN(skb->data);
|
|
if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
|
|
if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
if (mlen != count) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
|
|
|
|
if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
|
|
down(&cdev->ncci_list_sem);
|
|
capincci_free(cdev, CAPIMSG_NCCI(skb->data));
|
|
up(&cdev->ncci_list_sem);
|
|
}
|
|
|
|
cdev->errcode = capi20_put_message(&cdev->ap, skb);
|
|
|
|
if (cdev->errcode) {
|
|
kfree_skb(skb);
|
|
return -EIO;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static unsigned int
|
|
capi_poll(struct file *file, poll_table * wait)
|
|
{
|
|
struct capidev *cdev = (struct capidev *)file->private_data;
|
|
unsigned int mask = 0;
|
|
|
|
if (!cdev->ap.applid)
|
|
return POLLERR;
|
|
|
|
poll_wait(file, &(cdev->recvwait), wait);
|
|
mask = POLLOUT | POLLWRNORM;
|
|
if (!skb_queue_empty(&cdev->recvqueue))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
return mask;
|
|
}
|
|
|
|
static int
|
|
capi_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct capidev *cdev = file->private_data;
|
|
struct capi20_appl *ap = &cdev->ap;
|
|
capi_ioctl_struct data;
|
|
int retval = -EINVAL;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case CAPI_REGISTER:
|
|
{
|
|
if (ap->applid)
|
|
return -EEXIST;
|
|
|
|
if (copy_from_user(&cdev->ap.rparam, argp,
|
|
sizeof(struct capi_register_params)))
|
|
return -EFAULT;
|
|
|
|
cdev->ap.private = cdev;
|
|
cdev->ap.recv_message = capi_recv_message;
|
|
cdev->errcode = capi20_register(ap);
|
|
if (cdev->errcode) {
|
|
ap->applid = 0;
|
|
return -EIO;
|
|
}
|
|
}
|
|
return (int)ap->applid;
|
|
|
|
case CAPI_GET_VERSION:
|
|
{
|
|
if (copy_from_user(&data.contr, argp,
|
|
sizeof(data.contr)))
|
|
return -EFAULT;
|
|
cdev->errcode = capi20_get_version(data.contr, &data.version);
|
|
if (cdev->errcode)
|
|
return -EIO;
|
|
if (copy_to_user(argp, &data.version,
|
|
sizeof(data.version)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
|
|
case CAPI_GET_SERIAL:
|
|
{
|
|
if (copy_from_user(&data.contr, argp,
|
|
sizeof(data.contr)))
|
|
return -EFAULT;
|
|
cdev->errcode = capi20_get_serial (data.contr, data.serial);
|
|
if (cdev->errcode)
|
|
return -EIO;
|
|
if (copy_to_user(argp, data.serial,
|
|
sizeof(data.serial)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
case CAPI_GET_PROFILE:
|
|
{
|
|
if (copy_from_user(&data.contr, argp,
|
|
sizeof(data.contr)))
|
|
return -EFAULT;
|
|
|
|
if (data.contr == 0) {
|
|
cdev->errcode = capi20_get_profile(data.contr, &data.profile);
|
|
if (cdev->errcode)
|
|
return -EIO;
|
|
|
|
retval = copy_to_user(argp,
|
|
&data.profile.ncontroller,
|
|
sizeof(data.profile.ncontroller));
|
|
|
|
} else {
|
|
cdev->errcode = capi20_get_profile(data.contr, &data.profile);
|
|
if (cdev->errcode)
|
|
return -EIO;
|
|
|
|
retval = copy_to_user(argp, &data.profile,
|
|
sizeof(data.profile));
|
|
}
|
|
if (retval)
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
|
|
case CAPI_GET_MANUFACTURER:
|
|
{
|
|
if (copy_from_user(&data.contr, argp,
|
|
sizeof(data.contr)))
|
|
return -EFAULT;
|
|
cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
|
|
if (cdev->errcode)
|
|
return -EIO;
|
|
|
|
if (copy_to_user(argp, data.manufacturer,
|
|
sizeof(data.manufacturer)))
|
|
return -EFAULT;
|
|
|
|
}
|
|
return 0;
|
|
case CAPI_GET_ERRCODE:
|
|
data.errcode = cdev->errcode;
|
|
cdev->errcode = CAPI_NOERROR;
|
|
if (arg) {
|
|
if (copy_to_user(argp, &data.errcode,
|
|
sizeof(data.errcode)))
|
|
return -EFAULT;
|
|
}
|
|
return data.errcode;
|
|
|
|
case CAPI_INSTALLED:
|
|
if (capi20_isinstalled() == CAPI_NOERROR)
|
|
return 0;
|
|
return -ENXIO;
|
|
|
|
case CAPI_MANUFACTURER_CMD:
|
|
{
|
|
struct capi_manufacturer_cmd mcmd;
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
|
|
return -EFAULT;
|
|
return capi20_manufacturer(mcmd.cmd, mcmd.data);
|
|
}
|
|
return 0;
|
|
|
|
case CAPI_SET_FLAGS:
|
|
case CAPI_CLR_FLAGS:
|
|
{
|
|
unsigned userflags;
|
|
if (copy_from_user(&userflags, argp,
|
|
sizeof(userflags)))
|
|
return -EFAULT;
|
|
if (cmd == CAPI_SET_FLAGS)
|
|
cdev->userflags |= userflags;
|
|
else
|
|
cdev->userflags &= ~userflags;
|
|
}
|
|
return 0;
|
|
|
|
case CAPI_GET_FLAGS:
|
|
if (copy_to_user(argp, &cdev->userflags,
|
|
sizeof(cdev->userflags)))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case CAPI_NCCI_OPENCOUNT:
|
|
{
|
|
struct capincci *nccip;
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
struct capiminor *mp;
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
unsigned ncci;
|
|
int count = 0;
|
|
if (copy_from_user(&ncci, argp, sizeof(ncci)))
|
|
return -EFAULT;
|
|
|
|
down(&cdev->ncci_list_sem);
|
|
if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
|
|
up(&cdev->ncci_list_sem);
|
|
return 0;
|
|
}
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
if ((mp = nccip->minorp) != 0) {
|
|
count += atomic_read(&mp->ttyopencount);
|
|
}
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
up(&cdev->ncci_list_sem);
|
|
return count;
|
|
}
|
|
return 0;
|
|
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
case CAPI_NCCI_GETUNIT:
|
|
{
|
|
struct capincci *nccip;
|
|
struct capiminor *mp;
|
|
unsigned ncci;
|
|
int unit = 0;
|
|
if (copy_from_user(&ncci, argp,
|
|
sizeof(ncci)))
|
|
return -EFAULT;
|
|
down(&cdev->ncci_list_sem);
|
|
nccip = capincci_find(cdev, (u32) ncci);
|
|
if (!nccip || (mp = nccip->minorp) == 0) {
|
|
up(&cdev->ncci_list_sem);
|
|
return -ESRCH;
|
|
}
|
|
unit = mp->minor;
|
|
up(&cdev->ncci_list_sem);
|
|
return unit;
|
|
}
|
|
return 0;
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int
|
|
capi_open(struct inode *inode, struct file *file)
|
|
{
|
|
if (file->private_data)
|
|
return -EEXIST;
|
|
|
|
if ((file->private_data = capidev_alloc()) == 0)
|
|
return -ENOMEM;
|
|
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
capi_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct capidev *cdev = (struct capidev *)file->private_data;
|
|
|
|
capidev_free(cdev);
|
|
file->private_data = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations capi_fops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = capi_read,
|
|
.write = capi_write,
|
|
.poll = capi_poll,
|
|
.ioctl = capi_ioctl,
|
|
.open = capi_open,
|
|
.release = capi_release,
|
|
};
|
|
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
/* -------- tty_operations for capincci ----------------------------- */
|
|
|
|
static int capinc_tty_open(struct tty_struct * tty, struct file * file)
|
|
{
|
|
struct capiminor *mp;
|
|
|
|
if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0)
|
|
return -ENXIO;
|
|
if (mp->nccip == 0)
|
|
return -ENXIO;
|
|
|
|
tty->driver_data = (void *)mp;
|
|
|
|
if (atomic_read(&mp->ttyopencount) == 0)
|
|
mp->tty = tty;
|
|
atomic_inc(&mp->ttyopencount);
|
|
#ifdef _DEBUG_REFCOUNT
|
|
printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
|
|
#endif
|
|
handle_minor_recv(mp);
|
|
return 0;
|
|
}
|
|
|
|
static void capinc_tty_close(struct tty_struct * tty, struct file * file)
|
|
{
|
|
struct capiminor *mp;
|
|
|
|
mp = (struct capiminor *)tty->driver_data;
|
|
if (mp) {
|
|
if (atomic_dec_and_test(&mp->ttyopencount)) {
|
|
#ifdef _DEBUG_REFCOUNT
|
|
printk(KERN_DEBUG "capinc_tty_close lastclose\n");
|
|
#endif
|
|
tty->driver_data = NULL;
|
|
mp->tty = NULL;
|
|
}
|
|
#ifdef _DEBUG_REFCOUNT
|
|
printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
|
|
#endif
|
|
if (mp->nccip == 0)
|
|
capiminor_free(mp);
|
|
}
|
|
|
|
#ifdef _DEBUG_REFCOUNT
|
|
printk(KERN_DEBUG "capinc_tty_close\n");
|
|
#endif
|
|
}
|
|
|
|
static int capinc_tty_write(struct tty_struct * tty,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
struct sk_buff *skb;
|
|
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
|
|
#endif
|
|
|
|
if (!mp || !mp->nccip) {
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
skb = mp->ttyskb;
|
|
if (skb) {
|
|
mp->ttyskb = NULL;
|
|
skb_queue_tail(&mp->outqueue, skb);
|
|
mp->outbytes += skb->len;
|
|
}
|
|
|
|
skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
|
|
if (!skb) {
|
|
printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
|
|
memcpy(skb_put(skb, count), buf, count);
|
|
|
|
skb_queue_tail(&mp->outqueue, skb);
|
|
mp->outbytes += skb->len;
|
|
(void)handle_minor_send(mp);
|
|
(void)handle_minor_recv(mp);
|
|
return count;
|
|
}
|
|
|
|
static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
struct sk_buff *skb;
|
|
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
|
|
#endif
|
|
|
|
if (!mp || !mp->nccip) {
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
skb = mp->ttyskb;
|
|
if (skb) {
|
|
if (skb_tailroom(skb) > 0) {
|
|
*(skb_put(skb, 1)) = ch;
|
|
return;
|
|
}
|
|
mp->ttyskb = NULL;
|
|
skb_queue_tail(&mp->outqueue, skb);
|
|
mp->outbytes += skb->len;
|
|
(void)handle_minor_send(mp);
|
|
}
|
|
skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
|
|
if (skb) {
|
|
skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
|
|
*(skb_put(skb, 1)) = ch;
|
|
mp->ttyskb = skb;
|
|
} else {
|
|
printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
|
|
}
|
|
}
|
|
|
|
static void capinc_tty_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
struct sk_buff *skb;
|
|
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_flush_chars\n");
|
|
#endif
|
|
|
|
if (!mp || !mp->nccip) {
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
skb = mp->ttyskb;
|
|
if (skb) {
|
|
mp->ttyskb = NULL;
|
|
skb_queue_tail(&mp->outqueue, skb);
|
|
mp->outbytes += skb->len;
|
|
(void)handle_minor_send(mp);
|
|
}
|
|
(void)handle_minor_recv(mp);
|
|
}
|
|
|
|
static int capinc_tty_write_room(struct tty_struct *tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
int room;
|
|
if (!mp || !mp->nccip) {
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
|
|
room *= CAPI_MAX_BLKSIZE;
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
|
|
#endif
|
|
return room;
|
|
}
|
|
|
|
static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
if (!mp || !mp->nccip) {
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
|
|
mp->outbytes, mp->nack,
|
|
skb_queue_len(&mp->outqueue),
|
|
skb_queue_len(&mp->inqueue));
|
|
#endif
|
|
return mp->outbytes;
|
|
}
|
|
|
|
static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
int error = 0;
|
|
switch (cmd) {
|
|
default:
|
|
error = n_tty_ioctl (tty, file, cmd, arg);
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_set_termios\n");
|
|
#endif
|
|
}
|
|
|
|
static void capinc_tty_throttle(struct tty_struct * tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_throttle\n");
|
|
#endif
|
|
if (mp)
|
|
mp->ttyinstop = 1;
|
|
}
|
|
|
|
static void capinc_tty_unthrottle(struct tty_struct * tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_unthrottle\n");
|
|
#endif
|
|
if (mp) {
|
|
mp->ttyinstop = 0;
|
|
handle_minor_recv(mp);
|
|
}
|
|
}
|
|
|
|
static void capinc_tty_stop(struct tty_struct *tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_stop\n");
|
|
#endif
|
|
if (mp) {
|
|
mp->ttyoutstop = 1;
|
|
}
|
|
}
|
|
|
|
static void capinc_tty_start(struct tty_struct *tty)
|
|
{
|
|
struct capiminor *mp = (struct capiminor *)tty->driver_data;
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_start\n");
|
|
#endif
|
|
if (mp) {
|
|
mp->ttyoutstop = 0;
|
|
(void)handle_minor_send(mp);
|
|
}
|
|
}
|
|
|
|
static void capinc_tty_hangup(struct tty_struct *tty)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_hangup\n");
|
|
#endif
|
|
}
|
|
|
|
static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
|
|
#endif
|
|
}
|
|
|
|
static void capinc_tty_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
|
|
#endif
|
|
}
|
|
|
|
static void capinc_tty_set_ldisc(struct tty_struct *tty)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
|
|
#endif
|
|
}
|
|
|
|
static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
|
|
{
|
|
#ifdef _DEBUG_TTYFUNCS
|
|
printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
|
|
#endif
|
|
}
|
|
|
|
static int capinc_tty_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct tty_driver *capinc_tty_driver;
|
|
|
|
static struct tty_operations capinc_ops = {
|
|
.open = capinc_tty_open,
|
|
.close = capinc_tty_close,
|
|
.write = capinc_tty_write,
|
|
.put_char = capinc_tty_put_char,
|
|
.flush_chars = capinc_tty_flush_chars,
|
|
.write_room = capinc_tty_write_room,
|
|
.chars_in_buffer = capinc_tty_chars_in_buffer,
|
|
.ioctl = capinc_tty_ioctl,
|
|
.set_termios = capinc_tty_set_termios,
|
|
.throttle = capinc_tty_throttle,
|
|
.unthrottle = capinc_tty_unthrottle,
|
|
.stop = capinc_tty_stop,
|
|
.start = capinc_tty_start,
|
|
.hangup = capinc_tty_hangup,
|
|
.break_ctl = capinc_tty_break_ctl,
|
|
.flush_buffer = capinc_tty_flush_buffer,
|
|
.set_ldisc = capinc_tty_set_ldisc,
|
|
.send_xchar = capinc_tty_send_xchar,
|
|
.read_proc = capinc_tty_read_proc,
|
|
};
|
|
|
|
static int capinc_tty_init(void)
|
|
{
|
|
struct tty_driver *drv;
|
|
|
|
if (capi_ttyminors > CAPINC_MAX_PORTS)
|
|
capi_ttyminors = CAPINC_MAX_PORTS;
|
|
if (capi_ttyminors <= 0)
|
|
capi_ttyminors = CAPINC_NR_PORTS;
|
|
|
|
drv = alloc_tty_driver(capi_ttyminors);
|
|
if (!drv)
|
|
return -ENOMEM;
|
|
|
|
drv->owner = THIS_MODULE;
|
|
drv->driver_name = "capi_nc";
|
|
drv->devfs_name = "capi/";
|
|
drv->name = "capi";
|
|
drv->major = capi_ttymajor;
|
|
drv->minor_start = 0;
|
|
drv->type = TTY_DRIVER_TYPE_SERIAL;
|
|
drv->subtype = SERIAL_TYPE_NORMAL;
|
|
drv->init_termios = tty_std_termios;
|
|
drv->init_termios.c_iflag = ICRNL;
|
|
drv->init_termios.c_oflag = OPOST | ONLCR;
|
|
drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
drv->init_termios.c_lflag = 0;
|
|
drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
|
|
tty_set_operations(drv, &capinc_ops);
|
|
if (tty_register_driver(drv)) {
|
|
put_tty_driver(drv);
|
|
printk(KERN_ERR "Couldn't register capi_nc driver\n");
|
|
return -1;
|
|
}
|
|
capinc_tty_driver = drv;
|
|
return 0;
|
|
}
|
|
|
|
static void capinc_tty_exit(void)
|
|
{
|
|
struct tty_driver *drv = capinc_tty_driver;
|
|
int retval;
|
|
if ((retval = tty_unregister_driver(drv)))
|
|
printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
|
|
put_tty_driver(drv);
|
|
}
|
|
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
|
|
/* -------- /proc functions ----------------------------------------- */
|
|
|
|
/*
|
|
* /proc/capi/capi20:
|
|
* minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
|
|
*/
|
|
static int proc_capidev_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
struct capidev *cdev;
|
|
struct list_head *l;
|
|
int len = 0;
|
|
|
|
read_lock(&capidev_list_lock);
|
|
list_for_each(l, &capidev_list) {
|
|
cdev = list_entry(l, struct capidev, list);
|
|
len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
|
|
cdev->ap.applid,
|
|
cdev->ap.nrecvctlpkt,
|
|
cdev->ap.nrecvdatapkt,
|
|
cdev->ap.nsentctlpkt,
|
|
cdev->ap.nsentdatapkt);
|
|
if (len <= off) {
|
|
off -= len;
|
|
len = 0;
|
|
} else {
|
|
if (len-off > count)
|
|
goto endloop;
|
|
}
|
|
}
|
|
|
|
endloop:
|
|
read_unlock(&capidev_list_lock);
|
|
if (len < count)
|
|
*eof = 1;
|
|
if (len > count) len = count;
|
|
if (len < 0) len = 0;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* /proc/capi/capi20ncci:
|
|
* applid ncci
|
|
*/
|
|
static int proc_capincci_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
struct capidev *cdev;
|
|
struct capincci *np;
|
|
struct list_head *l;
|
|
int len = 0;
|
|
|
|
read_lock(&capidev_list_lock);
|
|
list_for_each(l, &capidev_list) {
|
|
cdev = list_entry(l, struct capidev, list);
|
|
for (np=cdev->nccis; np; np = np->next) {
|
|
len += sprintf(page+len, "%d 0x%x\n",
|
|
cdev->ap.applid,
|
|
np->ncci);
|
|
if (len <= off) {
|
|
off -= len;
|
|
len = 0;
|
|
} else {
|
|
if (len-off > count)
|
|
goto endloop;
|
|
}
|
|
}
|
|
}
|
|
endloop:
|
|
read_unlock(&capidev_list_lock);
|
|
*start = page+off;
|
|
if (len < count)
|
|
*eof = 1;
|
|
if (len>count) len = count;
|
|
if (len<0) len = 0;
|
|
return len;
|
|
}
|
|
|
|
static struct procfsentries {
|
|
char *name;
|
|
mode_t mode;
|
|
int (*read_proc)(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data);
|
|
struct proc_dir_entry *procent;
|
|
} procfsentries[] = {
|
|
/* { "capi", S_IFDIR, 0 }, */
|
|
{ "capi/capi20", 0 , proc_capidev_read_proc },
|
|
{ "capi/capi20ncci", 0 , proc_capincci_read_proc },
|
|
};
|
|
|
|
static void __init proc_init(void)
|
|
{
|
|
int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
|
|
int i;
|
|
|
|
for (i=0; i < nelem; i++) {
|
|
struct procfsentries *p = procfsentries + i;
|
|
p->procent = create_proc_entry(p->name, p->mode, NULL);
|
|
if (p->procent) p->procent->read_proc = p->read_proc;
|
|
}
|
|
}
|
|
|
|
static void __exit proc_exit(void)
|
|
{
|
|
int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
|
|
int i;
|
|
|
|
for (i=nelem-1; i >= 0; i--) {
|
|
struct procfsentries *p = procfsentries + i;
|
|
if (p->procent) {
|
|
remove_proc_entry(p->name, NULL);
|
|
p->procent = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* -------- init function and module interface ---------------------- */
|
|
|
|
|
|
static char rev[32];
|
|
|
|
static int __init capi_init(void)
|
|
{
|
|
char *p;
|
|
char *compileinfo;
|
|
|
|
if ((p = strchr(revision, ':')) != 0 && p[1]) {
|
|
strlcpy(rev, p + 2, sizeof(rev));
|
|
if ((p = strchr(rev, '$')) != 0 && p > rev)
|
|
*(p-1) = 0;
|
|
} else
|
|
strcpy(rev, "1.0");
|
|
|
|
if (register_chrdev(capi_major, "capi20", &capi_fops)) {
|
|
printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
|
|
return -EIO;
|
|
}
|
|
|
|
capi_class = class_create(THIS_MODULE, "capi");
|
|
if (IS_ERR(capi_class)) {
|
|
unregister_chrdev(capi_major, "capi20");
|
|
return PTR_ERR(capi_class);
|
|
}
|
|
|
|
class_device_create(capi_class, MKDEV(capi_major, 0), NULL, "capi");
|
|
devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR,
|
|
"isdn/capi20");
|
|
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
if (capinc_tty_init() < 0) {
|
|
class_device_destroy(capi_class, MKDEV(capi_major, 0));
|
|
class_destroy(capi_class);
|
|
unregister_chrdev(capi_major, "capi20");
|
|
return -ENOMEM;
|
|
}
|
|
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
|
|
|
proc_init();
|
|
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
|
|
compileinfo = " (middleware+capifs)";
|
|
#else
|
|
compileinfo = " (no capifs)";
|
|
#endif
|
|
#else
|
|
compileinfo = " (no middleware)";
|
|
#endif
|
|
printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
|
|
rev, capi_major, compileinfo);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit capi_exit(void)
|
|
{
|
|
proc_exit();
|
|
|
|
class_device_destroy(capi_class, MKDEV(capi_major, 0));
|
|
class_destroy(capi_class);
|
|
unregister_chrdev(capi_major, "capi20");
|
|
devfs_remove("isdn/capi20");
|
|
|
|
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
|
capinc_tty_exit();
|
|
#endif
|
|
printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
|
|
}
|
|
|
|
module_init(capi_init);
|
|
module_exit(capi_exit);
|