capi.c
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上传日期:2013-04-10
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- /* $Id: capi.c,v 1.1.4.2 2001/12/09 18:45:13 kai Exp $
- *
- * CAPI 2.0 Interface for Linux
- *
- * Copyright 1996 by Carsten Paeth <calle@calle.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/errno.h>
- #include <linux/kernel.h>
- #include <linux/major.h>
- #include <linux/sched.h>
- #include <linux/slab.h>
- #include <linux/fcntl.h>
- #include <linux/fs.h>
- #include <linux/signal.h>
- #include <linux/mm.h>
- #include <linux/smp_lock.h>
- #include <linux/timer.h>
- #include <linux/wait.h>
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- #include <linux/tty.h>
- #ifdef CONFIG_PPP
- #include <linux/netdevice.h>
- #include <linux/ppp_defs.h>
- #include <linux/if_ppp.h>
- #undef CAPI_PPP_ON_RAW_DEVICE
- #endif /* CONFIG_PPP */
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- #include <linux/skbuff.h>
- #include <linux/proc_fs.h>
- #include <linux/poll.h>
- #include <linux/capi.h>
- #include <linux/kernelcapi.h>
- #include <linux/init.h>
- #include <linux/devfs_fs_kernel.h>
- #include "capiutil.h"
- #include "capicmd.h"
- #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- #include "capifs.h"
- #endif
- static char *revision = "$Revision: 1.1.4.2 $";
- MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
- MODULE_AUTHOR("Carsten Paeth");
- MODULE_LICENSE("GPL");
- #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
- #undef _DEBUG_TTYFUNCS /* call to tty_driver */
- #undef _DEBUG_DATAFLOW /* data flow */
- /* -------- driver information -------------------------------------- */
- int capi_major = 68; /* allocated */
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- int capi_rawmajor = 190;
- int capi_ttymajor = 191;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- MODULE_PARM(capi_major, "i");
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- MODULE_PARM(capi_rawmajor, "i");
- MODULE_PARM(capi_ttymajor, "i");
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- /* -------- defines ------------------------------------------------- */
- #define CAPINC_MAX_RECVQUEUE 10
- #define CAPINC_MAX_SENDQUEUE 10
- #define CAPI_MAX_BLKSIZE 2048
- /* -------- data structures ----------------------------------------- */
- struct capidev;
- struct capincci;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor;
- struct capiminor {
- struct capiminor *next;
- struct capincci *nccip;
- unsigned int minor;
- u16 applid;
- u32 ncci;
- u16 datahandle;
- u16 msgid;
- struct file *file;
- struct tty_struct *tty;
- int ttyinstop;
- int ttyoutstop;
- struct sk_buff *ttyskb;
- atomic_t ttyopencount;
- struct sk_buff_head inqueue;
- int inbytes;
- struct sk_buff_head outqueue;
- int outbytes;
- /* for raw device */
- struct sk_buff_head recvqueue;
- wait_queue_head_t recvwait;
- wait_queue_head_t sendwait;
-
- /* transmit path */
- struct datahandle_queue {
- struct datahandle_queue *next;
- u16 datahandle;
- } *ackqueue;
- int nack;
- };
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- struct capincci {
- struct capincci *next;
- u32 ncci;
- struct capidev *cdev;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor *minorp;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- };
- struct capidev {
- struct capidev *next;
- struct file *file;
- u16 applid;
- u16 errcode;
- unsigned int minor;
- unsigned userflags;
- struct sk_buff_head recvqueue;
- wait_queue_head_t recvwait;
- /* Statistic */
- unsigned long nrecvctlpkt;
- unsigned long nrecvdatapkt;
- unsigned long nsentctlpkt;
- unsigned long nsentdatapkt;
-
- struct capincci *nccis;
- };
- /* -------- global variables ---------------------------------------- */
- static struct capi_interface *capifuncs = 0;
- static struct capidev *capidev_openlist = 0;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- static struct capiminor *minors = 0;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- static kmem_cache_t *capidev_cachep = 0;
- static kmem_cache_t *capincci_cachep = 0;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- static kmem_cache_t *capiminor_cachep = 0;
- static kmem_cache_t *capidh_cachep = 0;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- /* -------- datahandles --------------------------------------------- */
- static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
- {
- struct datahandle_queue *n, **pp;
- n = (struct datahandle_queue *)
- kmem_cache_alloc(capidh_cachep, GFP_ATOMIC);
- if (!n) {
- printk(KERN_ERR "capi: alloc datahandle failedn");
- return -1;
- }
- n->next = 0;
- n->datahandle = datahandle;
- for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) ;
- *pp = n;
- mp->nack++;
- return 0;
- }
- static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
- {
- struct datahandle_queue **pp, *p;
- for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) {
- if ((*pp)->datahandle == datahandle) {
- p = *pp;
- *pp = (*pp)->next;
- kmem_cache_free(capidh_cachep, p);
- mp->nack--;
- return 0;
- }
- }
- return -1;
- }
- static void capiminor_del_all_ack(struct capiminor *mp)
- {
- struct datahandle_queue **pp, *p;
- pp = &mp->ackqueue;
- while (*pp) {
- p = *pp;
- *pp = (*pp)->next;
- kmem_cache_free(capidh_cachep, p);
- mp->nack--;
- }
- }
- /* -------- struct capiminor ---------------------------------------- */
- static struct capiminor *capiminor_alloc(u16 applid, u32 ncci)
- {
- struct capiminor *mp, **pp;
- unsigned int minor = 0;
- MOD_INC_USE_COUNT;
- mp = (struct capiminor *)kmem_cache_alloc(capiminor_cachep, GFP_ATOMIC);
- if (!mp) {
- MOD_DEC_USE_COUNT;
- printk(KERN_ERR "capi: can't alloc capiminorn");
- return 0;
- }
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capiminor_alloc %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- memset(mp, 0, sizeof(struct capiminor));
- mp->applid = applid;
- mp->ncci = ncci;
- mp->msgid = 0;
- atomic_set(&mp->ttyopencount,0);
- skb_queue_head_init(&mp->inqueue);
- skb_queue_head_init(&mp->outqueue);
- skb_queue_head_init(&mp->recvqueue);
- init_waitqueue_head(&mp->recvwait);
- init_waitqueue_head(&mp->sendwait);
- for (pp = &minors; *pp; pp = &(*pp)->next) {
- if ((*pp)->minor < minor)
- continue;
- if ((*pp)->minor > minor)
- break;
- minor++;
- }
- mp->minor = minor;
- mp->next = *pp;
- *pp = mp;
- return mp;
- }
- static void capiminor_free(struct capiminor *mp)
- {
- struct capiminor **pp;
- pp = &minors;
- while (*pp) {
- if (*pp == mp) {
- *pp = (*pp)->next;
- if (mp->ttyskb) kfree_skb(mp->ttyskb);
- mp->ttyskb = 0;
- skb_queue_purge(&mp->recvqueue);
- skb_queue_purge(&mp->inqueue);
- skb_queue_purge(&mp->outqueue);
- capiminor_del_all_ack(mp);
- kmem_cache_free(capiminor_cachep, mp);
- MOD_DEC_USE_COUNT;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capiminor_free %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- return;
- } else {
- pp = &(*pp)->next;
- }
- }
- }
- static struct capiminor *capiminor_find(unsigned int minor)
- {
- struct capiminor *p;
- for (p = minors; p && p->minor != minor; p = p->next)
- ;
- return p;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- /* -------- struct capincci ----------------------------------------- */
- static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
- {
- struct capincci *np, **pp;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor *mp = 0;
- kdev_t kdev;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- np = (struct capincci *)kmem_cache_alloc(capincci_cachep, GFP_ATOMIC);
- if (!np)
- return 0;
- memset(np, 0, sizeof(struct capincci));
- np->ncci = ncci;
- np->cdev = cdev;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- mp = 0;
- if (cdev->userflags & CAPIFLAG_HIGHJACKING)
- mp = np->minorp = capiminor_alloc(cdev->applid, ncci);
- if (mp) {
- mp->nccip = np;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "set mp->nccipn");
- #endif
- #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- kdev = MKDEV(capi_rawmajor, mp->minor);
- capifs_new_ncci('r', mp->minor, kdev);
- kdev = MKDEV(capi_ttymajor, mp->minor);
- capifs_new_ncci(0, mp->minor, kdev);
- #endif
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
- ;
- *pp = np;
- return np;
- }
- static void capincci_free(struct capidev *cdev, u32 ncci)
- {
- struct capincci *np, **pp;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor *mp;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- pp=&cdev->nccis;
- while (*pp) {
- np = *pp;
- if (ncci == 0xffffffff || np->ncci == ncci) {
- *pp = (*pp)->next;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if ((mp = np->minorp) != 0) {
- #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- capifs_free_ncci('r', mp->minor);
- capifs_free_ncci(0, mp->minor);
- #endif
- if (mp->tty) {
- mp->nccip = 0;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "reset mp->nccipn");
- #endif
- tty_hangup(mp->tty);
- } else if (mp->file) {
- mp->nccip = 0;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "reset mp->nccipn");
- #endif
- wake_up_interruptible(&mp->recvwait);
- wake_up_interruptible(&mp->sendwait);
- } else {
- capiminor_free(mp);
- }
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- kmem_cache_free(capincci_cachep, np);
- if (*pp == 0) return;
- } else {
- pp = &(*pp)->next;
- }
- }
- }
- static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
- {
- struct capincci *p;
- for (p=cdev->nccis; p ; p = p->next) {
- if (p->ncci == ncci)
- break;
- }
- return p;
- }
- /* -------- struct capidev ------------------------------------------ */
- static struct capidev *capidev_alloc(struct file *file)
- {
- struct capidev *cdev;
- struct capidev **pp;
- cdev = (struct capidev *)kmem_cache_alloc(capidev_cachep, GFP_KERNEL);
- if (!cdev)
- return 0;
- memset(cdev, 0, sizeof(struct capidev));
- cdev->file = file;
- cdev->minor = MINOR(file->f_dentry->d_inode->i_rdev);
- skb_queue_head_init(&cdev->recvqueue);
- init_waitqueue_head(&cdev->recvwait);
- pp=&capidev_openlist;
- while (*pp) pp = &(*pp)->next;
- *pp = cdev;
- return cdev;
- }
- static void capidev_free(struct capidev *cdev)
- {
- struct capidev **pp;
- if (cdev->applid)
- (*capifuncs->capi_release) (cdev->applid);
- cdev->applid = 0;
- skb_queue_purge(&cdev->recvqueue);
-
- pp=&capidev_openlist;
- while (*pp && *pp != cdev) pp = &(*pp)->next;
- if (*pp)
- *pp = cdev->next;
- kmem_cache_free(capidev_cachep, cdev);
- }
- static struct capidev *capidev_find(u16 applid)
- {
- struct capidev *p;
- for (p=capidev_openlist; p; p = p->next) {
- if (p->applid == applid)
- break;
- }
- return p;
- }
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- /* -------- handle data queue --------------------------------------- */
- static struct sk_buff *
- gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
- {
- struct sk_buff *nskb;
- nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
- if (nskb) {
- u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
- unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
- capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
- capimsg_setu16(s, 2, mp->applid);
- capimsg_setu8 (s, 4, CAPI_DATA_B3);
- capimsg_setu8 (s, 5, CAPI_RESP);
- capimsg_setu16(s, 6, mp->msgid++);
- capimsg_setu32(s, 8, mp->ncci);
- capimsg_setu16(s, 12, datahandle);
- }
- return nskb;
- }
- static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
- {
- struct sk_buff *nskb;
- unsigned int datalen;
- u16 errcode, datahandle;
- datalen = skb->len - CAPIMSG_LEN(skb->data);
- if (mp->tty) {
- if (mp->tty->ldisc.receive_buf == 0) {
- printk(KERN_ERR "capi: ldisc has no receive_buf functionn");
- return -1;
- }
- if (mp->ttyinstop) {
- #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
- printk(KERN_DEBUG "capi: recv tty throttledn");
- #endif
- return -1;
- }
- if (mp->tty->ldisc.receive_room &&
- mp->tty->ldisc.receive_room(mp->tty) < datalen) {
- #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
- printk(KERN_DEBUG "capi: no room in ttyn");
- #endif
- return -1;
- }
- if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
- printk(KERN_ERR "capi: gen_data_b3_resp failedn");
- return -1;
- }
- datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
- errcode = (*capifuncs->capi_put_message)(mp->applid, nskb);
- if (errcode != CAPI_NOERROR) {
- printk(KERN_ERR "capi: send DATA_B3_RESP failed=%xn",
- errcode);
- kfree_skb(nskb);
- return -1;
- }
- (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
- #ifdef _DEBUG_DATAFLOW
- printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldiscn",
- datahandle, skb->len);
- #endif
- mp->tty->ldisc.receive_buf(mp->tty, skb->data, 0, skb->len);
- kfree_skb(skb);
- return 0;
- } else if (mp->file) {
- if (skb_queue_len(&mp->recvqueue) > CAPINC_MAX_RECVQUEUE) {
- #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
- printk(KERN_DEBUG "capi: no room in raw queuen");
- #endif
- return -1;
- }
- if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
- printk(KERN_ERR "capi: gen_data_b3_resp failedn");
- return -1;
- }
- datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
- errcode = (*capifuncs->capi_put_message)(mp->applid, nskb);
- if (errcode != CAPI_NOERROR) {
- printk(KERN_ERR "capi: send DATA_B3_RESP failed=%xn",
- errcode);
- kfree_skb(nskb);
- return -1;
- }
- (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
- #ifdef _DEBUG_DATAFLOW
- printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => rawn",
- datahandle, skb->len);
- #endif
- skb_queue_tail(&mp->recvqueue, skb);
- wake_up_interruptible(&mp->recvwait);
- return 0;
- }
- #ifdef _DEBUG_DATAFLOW
- printk(KERN_DEBUG "capi: currently no receivern");
- #endif
- return -1;
- }
- static void handle_minor_recv(struct capiminor *mp)
- {
- struct sk_buff *skb;
- while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
- unsigned int len = skb->len;
- mp->inbytes -= len;
- if (handle_recv_skb(mp, skb) < 0) {
- skb_queue_head(&mp->inqueue, skb);
- mp->inbytes += len;
- return;
- }
- }
- }
- 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 stoppedn");
- #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->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 = (*capifuncs->capi_put_message) (mp->applid, skb);
- if (errcode == CAPI_NOERROR) {
- mp->datahandle++;
- count++;
- mp->outbytes -= len;
- #ifdef _DEBUG_DATAFLOW
- printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%un",
- 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 = %xn", errcode);
- mp->outbytes -= len;
- kfree_skb(skb);
- }
- if (count)
- wake_up_interruptible(&mp->sendwait);
- return count;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- /* -------- function called by lower level -------------------------- */
- static void capi_signal(u16 applid, void *param)
- {
- struct capidev *cdev = (struct capidev *)param;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor *mp;
- u16 datahandle;
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- struct capincci *np;
- struct sk_buff *skb = 0;
- u32 ncci;
- (void) (*capifuncs->capi_get_message) (applid, &skb);
- if (!skb) {
- printk(KERN_ERR "BUG: capi_signal: no skbn");
- return;
- }
- 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 foundn");
- 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=%dn",
- 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%xn",
- datahandle,
- CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
- #endif
- kfree_skb(skb);
- (void)capiminor_del_ack(mp, datahandle);
- if (mp->tty) {
- if (mp->tty->ldisc.write_wakeup)
- mp->tty->ldisc.write_wakeup(mp->tty);
- } else {
- wake_up_interruptible(&mp->sendwait);
- }
- (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 *buf, size_t count, loff_t *ppos)
- {
- struct capidev *cdev = (struct capidev *)file->private_data;
- struct sk_buff *skb;
- int retval;
- size_t copied;
- if (ppos != &file->f_pos)
- return -ESPIPE;
- if (!cdev->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;
- }
- retval = copy_to_user(buf, skb->data, skb->len);
- if (retval) {
- skb_queue_head(&cdev->recvqueue, skb);
- return retval;
- }
- copied = skb->len;
- if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_IND) {
- cdev->nrecvdatapkt++;
- } else {
- cdev->nrecvctlpkt++;
- }
- kfree_skb(skb);
- return copied;
- }
- static ssize_t
- capi_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
- {
- struct capidev *cdev = (struct capidev *)file->private_data;
- struct sk_buff *skb;
- int retval;
- u16 mlen;
- if (ppos != &file->f_pos)
- return -ESPIPE;
- if (!cdev->applid)
- return -ENODEV;
- skb = alloc_skb(count, GFP_USER);
- if (!skb)
- return -ENOMEM;
- if ((retval = 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 (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->applid);
- cdev->errcode = (*capifuncs->capi_put_message) (cdev->applid, skb);
- if (cdev->errcode) {
- kfree_skb(skb);
- return -EIO;
- }
- if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
- cdev->nsentdatapkt++;
- } else {
- cdev->nsentctlpkt++;
- }
- 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->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 = (struct capidev *)file->private_data;
- capi_ioctl_struct data;
- int retval = -EINVAL;
- switch (cmd) {
- case CAPI_REGISTER:
- {
- retval = copy_from_user((void *) &data.rparams,
- (void *) arg, sizeof(struct capi_register_params));
- if (retval)
- return -EFAULT;
- if (cdev->applid)
- return -EEXIST;
- cdev->errcode = (*capifuncs->capi_register) (&data.rparams,
- &cdev->applid);
- if (cdev->errcode) {
- cdev->applid = 0;
- return -EIO;
- }
- (void) (*capifuncs->capi_set_signal) (cdev->applid, capi_signal, cdev);
- }
- return (int)cdev->applid;
- case CAPI_GET_VERSION:
- {
- retval = copy_from_user((void *) &data.contr,
- (void *) arg,
- sizeof(data.contr));
- if (retval)
- return -EFAULT;
- cdev->errcode = (*capifuncs->capi_get_version) (data.contr, &data.version);
- if (cdev->errcode)
- return -EIO;
- retval = copy_to_user((void *) arg,
- (void *) &data.version,
- sizeof(data.version));
- if (retval)
- return -EFAULT;
- }
- return 0;
- case CAPI_GET_SERIAL:
- {
- retval = copy_from_user((void *) &data.contr,
- (void *) arg,
- sizeof(data.contr));
- if (retval)
- return -EFAULT;
- cdev->errcode = (*capifuncs->capi_get_serial) (data.contr, data.serial);
- if (cdev->errcode)
- return -EIO;
- retval = copy_to_user((void *) arg,
- (void *) data.serial,
- sizeof(data.serial));
- if (retval)
- return -EFAULT;
- }
- return 0;
- case CAPI_GET_PROFILE:
- {
- retval = copy_from_user((void *) &data.contr,
- (void *) arg,
- sizeof(data.contr));
- if (retval)
- return -EFAULT;
- if (data.contr == 0) {
- cdev->errcode = (*capifuncs->capi_get_profile) (data.contr, &data.profile);
- if (cdev->errcode)
- return -EIO;
- retval = copy_to_user((void *) arg,
- (void *) &data.profile.ncontroller,
- sizeof(data.profile.ncontroller));
- } else {
- cdev->errcode = (*capifuncs->capi_get_profile) (data.contr, &data.profile);
- if (cdev->errcode)
- return -EIO;
- retval = copy_to_user((void *) arg,
- (void *) &data.profile,
- sizeof(data.profile));
- }
- if (retval)
- return -EFAULT;
- }
- return 0;
- case CAPI_GET_MANUFACTURER:
- {
- retval = copy_from_user((void *) &data.contr,
- (void *) arg,
- sizeof(data.contr));
- if (retval)
- return -EFAULT;
- cdev->errcode = (*capifuncs->capi_get_manufacturer) (data.contr, data.manufacturer);
- if (cdev->errcode)
- return -EIO;
- retval = copy_to_user((void *) arg, (void *) data.manufacturer,
- sizeof(data.manufacturer));
- if (retval)
- return -EFAULT;
- }
- return 0;
- case CAPI_GET_ERRCODE:
- data.errcode = cdev->errcode;
- cdev->errcode = CAPI_NOERROR;
- if (arg) {
- retval = copy_to_user((void *) arg,
- (void *) &data.errcode,
- sizeof(data.errcode));
- if (retval)
- return -EFAULT;
- }
- return data.errcode;
- case CAPI_INSTALLED:
- if ((*capifuncs->capi_isinstalled)() == CAPI_NOERROR)
- return 0;
- return -ENXIO;
- case CAPI_MANUFACTURER_CMD:
- {
- struct capi_manufacturer_cmd mcmd;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- retval = copy_from_user((void *) &mcmd, (void *) arg,
- sizeof(mcmd));
- if (retval)
- return -EFAULT;
- return (*capifuncs->capi_manufacturer) (mcmd.cmd, mcmd.data);
- }
- return 0;
- case CAPI_SET_FLAGS:
- case CAPI_CLR_FLAGS:
- {
- unsigned userflags;
- retval = copy_from_user((void *) &userflags,
- (void *) arg,
- sizeof(userflags));
- if (retval)
- return -EFAULT;
- if (cmd == CAPI_SET_FLAGS)
- cdev->userflags |= userflags;
- else
- cdev->userflags &= ~userflags;
- }
- return 0;
- case CAPI_GET_FLAGS:
- {
- retval = copy_to_user((void *) arg,
- (void *) &cdev->userflags,
- sizeof(cdev->userflags));
- if (retval)
- 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;
- retval = copy_from_user((void *) &ncci,
- (void *) arg,
- sizeof(ncci));
- if (retval)
- return -EFAULT;
- nccip = capincci_find(cdev, (u32) ncci);
- if (!nccip)
- return 0;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if ((mp = nccip->minorp) != 0) {
- count += atomic_read(&mp->ttyopencount);
- if (mp->file)
- count++;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- return count;
- }
- return 0;
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- case CAPI_NCCI_GETUNIT:
- {
- struct capincci *nccip;
- struct capiminor *mp;
- unsigned ncci;
- retval = copy_from_user((void *) &ncci,
- (void *) arg,
- sizeof(ncci));
- if (retval)
- return -EFAULT;
- nccip = capincci_find(cdev, (u32) ncci);
- if (!nccip || (mp = nccip->minorp) == 0)
- return -ESRCH;
- return mp->minor;
- }
- 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(file)) == 0)
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capi_open %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- return 0;
- }
- static int
- capi_release(struct inode *inode, struct file *file)
- {
- struct capidev *cdev = (struct capidev *)file->private_data;
- lock_kernel();
- capincci_free(cdev, 0xffffffff);
- capidev_free(cdev);
- file->private_data = NULL;
-
- MOD_DEC_USE_COUNT;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capi_release %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- unlock_kernel();
- 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
- /* -------- file_operations for capincci ---------------------------- */
- static int
- capinc_raw_open(struct inode *inode, struct file *file)
- {
- struct capiminor *mp;
- if (file->private_data)
- return -EEXIST;
- if ((mp = capiminor_find(MINOR(file->f_dentry->d_inode->i_rdev))) == 0)
- return -ENXIO;
- if (mp->nccip == 0)
- return -ENXIO;
- if (mp->file)
- return -EBUSY;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capi_raw_open %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- mp->datahandle = 0;
- mp->file = file;
- file->private_data = (void *)mp;
- handle_minor_recv(mp);
- return 0;
- }
- static ssize_t
- capinc_raw_read(struct file *file, char *buf, size_t count, loff_t *ppos)
- {
- struct capiminor *mp = (struct capiminor *)file->private_data;
- struct sk_buff *skb;
- int retval;
- size_t copied = 0;
- if (ppos != &file->f_pos)
- return -ESPIPE;
- if (!mp || !mp->nccip)
- return -EINVAL;
- if ((skb = skb_dequeue(&mp->recvqueue)) == 0) {
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
- for (;;) {
- interruptible_sleep_on(&mp->recvwait);
- if (mp->nccip == 0)
- return 0;
- if ((skb = skb_dequeue(&mp->recvqueue)) != 0)
- break;
- if (signal_pending(current))
- break;
- }
- if (skb == 0)
- return -ERESTARTNOHAND;
- }
- do {
- if (count < skb->len) {
- retval = copy_to_user(buf, skb->data, count);
- if (retval) {
- skb_queue_head(&mp->recvqueue, skb);
- return retval;
- }
- skb_pull(skb, count);
- skb_queue_head(&mp->recvqueue, skb);
- copied += count;
- return copied;
- } else {
- retval = copy_to_user(buf, skb->data, skb->len);
- if (retval) {
- skb_queue_head(&mp->recvqueue, skb);
- return copied;
- }
- copied += skb->len;
- count -= skb->len;
- buf += skb->len;
- kfree_skb(skb);
- }
- } while ((skb = skb_dequeue(&mp->recvqueue)) != 0);
- return copied;
- }
- static ssize_t
- capinc_raw_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
- {
- struct capiminor *mp = (struct capiminor *)file->private_data;
- struct sk_buff *skb;
- int retval;
- if (ppos != &file->f_pos)
- return -ESPIPE;
- if (!mp || !mp->nccip)
- return -EINVAL;
- skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_USER);
- if (!skb)
- return -ENOMEM;
- skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
- if ((retval = copy_from_user(skb_put(skb, count), buf, count))) {
- kfree_skb(skb);
- return -EFAULT;
- }
- while (skb_queue_len(&mp->outqueue) > CAPINC_MAX_SENDQUEUE) {
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
- interruptible_sleep_on(&mp->sendwait);
- if (mp->nccip == 0) {
- kfree_skb(skb);
- return -EIO;
- }
- if (signal_pending(current))
- return -ERESTARTNOHAND;
- }
- skb_queue_tail(&mp->outqueue, skb);
- mp->outbytes += skb->len;
- (void)handle_minor_send(mp);
- return count;
- }
- static unsigned int
- capinc_raw_poll(struct file *file, poll_table * wait)
- {
- struct capiminor *mp = (struct capiminor *)file->private_data;
- unsigned int mask = 0;
- if (!mp || !mp->nccip)
- return POLLERR|POLLHUP;
- poll_wait(file, &(mp->recvwait), wait);
- if (!skb_queue_empty(&mp->recvqueue))
- mask |= POLLIN | POLLRDNORM;
- poll_wait(file, &(mp->sendwait), wait);
- if (skb_queue_len(&mp->outqueue) > CAPINC_MAX_SENDQUEUE)
- mask = POLLOUT | POLLWRNORM;
- return mask;
- }
- static int
- capinc_raw_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- struct capiminor *mp = (struct capiminor *)file->private_data;
- if (!mp || !mp->nccip)
- return -EINVAL;
- switch (cmd) {
- }
- return -EINVAL;
- }
- static int
- capinc_raw_release(struct inode *inode, struct file *file)
- {
- struct capiminor *mp = (struct capiminor *)file->private_data;
- if (mp) {
- lock_kernel();
- mp->file = 0;
- if (mp->nccip == 0) {
- capiminor_free(mp);
- file->private_data = NULL;
- }
- unlock_kernel();
- }
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_raw_release %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- return 0;
- }
- static struct file_operations capinc_raw_fops =
- {
- owner: THIS_MODULE,
- llseek: no_llseek,
- read: capinc_raw_read,
- write: capinc_raw_write,
- poll: capinc_raw_poll,
- ioctl: capinc_raw_ioctl,
- open: capinc_raw_open,
- release: capinc_raw_release,
- };
- /* -------- tty_operations for capincci ----------------------------- */
- static int capinc_tty_open(struct tty_struct * tty, struct file * file)
- {
- struct capiminor *mp;
- if ((mp = capiminor_find(MINOR(file->f_dentry->d_inode->i_rdev))) == 0)
- return -ENXIO;
- if (mp->nccip == 0)
- return -ENXIO;
- if (mp->file)
- return -EBUSY;
- skb_queue_head_init(&mp->recvqueue);
- init_waitqueue_head(&mp->recvwait);
- init_waitqueue_head(&mp->sendwait);
- tty->driver_data = (void *)mp;
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capi_tty_open %dn", GET_USE_COUNT(THIS_MODULE));
- #endif
- if (atomic_read(&mp->ttyopencount) == 0)
- mp->tty = tty;
- atomic_inc(&mp->ttyopencount);
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_open ocount=%dn", 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 lastclosen");
- #endif
- tty->driver_data = (void *)0;
- mp->tty = 0;
- }
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_close ocount=%dn", atomic_read(&mp->ttyopencount));
- #endif
- if (mp->nccip == 0)
- capiminor_free(mp);
- }
- #ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_closen");
- #endif
- }
- static int capinc_tty_write(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count)
- {
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
- struct sk_buff *skb;
- int retval;
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_write(from_user=%d,count=%d)n",
- from_user, count);
- #endif
- if (!mp || !mp->nccip) {
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULLn");
- #endif
- return 0;
- }
- skb = mp->ttyskb;
- if (skb) {
- mp->ttyskb = 0;
- 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 failedn");
- return -ENOMEM;
- }
- skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
- if (from_user) {
- if ((retval = copy_from_user(skb_put(skb, count), buf, count))) {
- kfree_skb(skb);
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_write: copy_from_user=%dn", retval);
- #endif
- return -EFAULT;
- }
- } else {
- 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 NULLn");
- #endif
- return;
- }
- skb = mp->ttyskb;
- if (skb) {
- if (skb_tailroom(skb) > 0) {
- *(skb_put(skb, 1)) = ch;
- return;
- }
- mp->ttyskb = 0;
- 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 lostn", 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_charsn");
- #endif
- if (!mp || !mp->nccip) {
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULLn");
- #endif
- return;
- }
- skb = mp->ttyskb;
- if (skb) {
- mp->ttyskb = 0;
- 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 NULLn");
- #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 = %dn", 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 NULLn");
- #endif
- return 0;
- }
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%dn",
- 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_termiosn");
- #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_throttlen");
- #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_unthrottlen");
- #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_stopn");
- #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_startn");
- #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_hangupn");
- #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_buffern");
- #endif
- }
- static void capinc_tty_set_ldisc(struct tty_struct *tty)
- {
- #ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_set_ldiscn");
- #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;
- }
- #define CAPINC_NR_PORTS 256
- static struct tty_driver capinc_tty_driver;
- static int capinc_tty_refcount;
- static struct tty_struct *capinc_tty_table[CAPINC_NR_PORTS];
- static struct termios *capinc_tty_termios[CAPINC_NR_PORTS];
- static struct termios *capinc_tty_termios_locked[CAPINC_NR_PORTS];
- static int capinc_tty_init(void)
- {
- struct tty_driver *drv = &capinc_tty_driver;
- /* Initialize the tty_driver structure */
-
- memset(drv, 0, sizeof(struct tty_driver));
- drv->magic = TTY_DRIVER_MAGIC;
- #if (LINUX_VERSION_CODE > 0x20100)
- drv->driver_name = "capi_nc";
- #endif
- drv->name = "capi/%d";
- drv->major = capi_ttymajor;
- drv->minor_start = 0;
- drv->num = CAPINC_NR_PORTS;
- 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;
- drv->refcount = &capinc_tty_refcount;
- drv->table = capinc_tty_table;
- drv->termios = capinc_tty_termios;
- drv->termios_locked = capinc_tty_termios_locked;
- drv->open = capinc_tty_open;
- drv->close = capinc_tty_close;
- drv->write = capinc_tty_write;
- drv->put_char = capinc_tty_put_char;
- drv->flush_chars = capinc_tty_flush_chars;
- drv->write_room = capinc_tty_write_room;
- drv->chars_in_buffer = capinc_tty_chars_in_buffer;
- drv->ioctl = capinc_tty_ioctl;
- drv->set_termios = capinc_tty_set_termios;
- drv->throttle = capinc_tty_throttle;
- drv->unthrottle = capinc_tty_unthrottle;
- drv->stop = capinc_tty_stop;
- drv->start = capinc_tty_start;
- drv->hangup = capinc_tty_hangup;
- #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
- drv->break_ctl = capinc_tty_break_ctl;
- #endif
- drv->flush_buffer = capinc_tty_flush_buffer;
- drv->set_ldisc = capinc_tty_set_ldisc;
- #if (LINUX_VERSION_CODE >= 131343)
- drv->send_xchar = capinc_tty_send_xchar;
- drv->read_proc = capinc_tty_read_proc;
- #endif
- if (tty_register_driver(drv)) {
- printk(KERN_ERR "Couldn't register capi_nc drivern");
- return -1;
- }
- 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);
- }
- #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;
- int len = 0;
- for (cdev=capidev_openlist; cdev; cdev = cdev->next) {
- len += sprintf(page+len, "%d %d %lu %lu %lu %lun",
- cdev->minor,
- cdev->applid,
- cdev->nrecvctlpkt,
- cdev->nrecvdatapkt,
- cdev->nsentctlpkt,
- cdev->nsentdatapkt);
- if (len <= off) {
- off -= len;
- len = 0;
- } else {
- if (len-off > count)
- goto endloop;
- }
- }
- endloop:
- 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;
- int len = 0;
- for (cdev=capidev_openlist; cdev; cdev = cdev->next) {
- for (np=cdev->nccis; np; np = np->next) {
- len += sprintf(page+len, "%d 0x%x%sn",
- cdev->applid,
- np->ncci,
- #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
- "");
- #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- np->minorp && np->minorp->file ? " open" : "");
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- if (len <= off) {
- off -= len;
- len = 0;
- } else {
- if (len-off > count)
- goto endloop;
- }
- }
- }
- endloop:
- *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, 0);
- 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, 0);
- p->procent = 0;
- }
- }
- }
- /* -------- init function and module interface ---------------------- */
- static void alloc_exit(void)
- {
- if (capidev_cachep) {
- (void)kmem_cache_destroy(capidev_cachep);
- capidev_cachep = 0;
- }
- if (capincci_cachep) {
- (void)kmem_cache_destroy(capincci_cachep);
- capincci_cachep = 0;
- }
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if (capidh_cachep) {
- (void)kmem_cache_destroy(capidh_cachep);
- capidh_cachep = 0;
- }
- if (capiminor_cachep) {
- (void)kmem_cache_destroy(capiminor_cachep);
- capiminor_cachep = 0;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- }
- static int __init alloc_init(void)
- {
- capidev_cachep = kmem_cache_create("capi20_dev",
- sizeof(struct capidev),
- 0,
- SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!capidev_cachep) {
- alloc_exit();
- return -ENOMEM;
- }
- capincci_cachep = kmem_cache_create("capi20_ncci",
- sizeof(struct capincci),
- 0,
- SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!capincci_cachep) {
- alloc_exit();
- return -ENOMEM;
- }
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- capidh_cachep = kmem_cache_create("capi20_dh",
- sizeof(struct datahandle_queue),
- 0,
- SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!capidh_cachep) {
- alloc_exit();
- return -ENOMEM;
- }
- capiminor_cachep = kmem_cache_create("capi20_minor",
- sizeof(struct capiminor),
- 0,
- SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!capiminor_cachep) {
- alloc_exit();
- return -ENOMEM;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- return 0;
- }
- static void lower_callback(unsigned int cmd, u32 contr, void *data)
- {
- struct capi_ncciinfo *np;
- struct capidev *cdev;
- switch (cmd) {
- case KCI_CONTRUP:
- printk(KERN_INFO "capi: controller %hu upn", contr);
- break;
- case KCI_CONTRDOWN:
- printk(KERN_INFO "capi: controller %hu downn", contr);
- break;
- case KCI_NCCIUP:
- np = (struct capi_ncciinfo *)data;
- if ((cdev = capidev_find(np->applid)) == 0)
- return;
- (void)capincci_alloc(cdev, np->ncci);
- break;
- case KCI_NCCIDOWN:
- np = (struct capi_ncciinfo *)data;
- if ((cdev = capidev_find(np->applid)) == 0)
- return;
- (void)capincci_free(cdev, np->ncci);
- break;
- }
- }
- static struct capi_interface_user cuser = {
- name: "capi20",
- callback: lower_callback,
- };
- static char rev[32];
- static int __init capi_init(void)
- {
- char *p;
- char *compileinfo;
- MOD_INC_USE_COUNT;
- if ((p = strchr(revision, ':')) != 0 && p[1]) {
- strncpy(rev, p + 2, sizeof(rev));
- rev[sizeof(rev)-1] = 0;
- if ((p = strchr(rev, '$')) != 0 && p > rev)
- *(p-1) = 0;
- } else
- strcpy(rev, "1.0");
- if (devfs_register_chrdev(capi_major, "capi20", &capi_fops)) {
- printk(KERN_ERR "capi20: unable to get major %dn", capi_major);
- MOD_DEC_USE_COUNT;
- return -EIO;
- }
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if (devfs_register_chrdev(capi_rawmajor, "capi/r%d", &capinc_raw_fops)) {
- devfs_unregister_chrdev(capi_major, "capi20");
- printk(KERN_ERR "capi20: unable to get major %dn", capi_rawmajor);
- MOD_DEC_USE_COUNT;
- return -EIO;
- }
- devfs_register_series (NULL, "capi/r%u", CAPINC_NR_PORTS,
- DEVFS_FL_DEFAULT,
- capi_rawmajor, 0,
- S_IFCHR | S_IRUSR | S_IWUSR,
- &capinc_raw_fops, NULL);
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- devfs_register (NULL, "isdn/capi20", DEVFS_FL_DEFAULT,
- capi_major, 0, S_IFCHR | S_IRUSR | S_IWUSR,
- &capi_fops, NULL);
- printk(KERN_NOTICE "capi20: started up with major %dn", capi_major);
- if ((capifuncs = attach_capi_interface(&cuser)) == 0) {
- MOD_DEC_USE_COUNT;
- devfs_unregister_chrdev(capi_major, "capi20");
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- devfs_unregister_chrdev(capi_rawmajor, "capi/r%d");
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- devfs_unregister(devfs_find_handle(NULL, "capi20",
- capi_major, 0,
- DEVFS_SPECIAL_CHR, 0));
- return -EIO;
- }
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if (capinc_tty_init() < 0) {
- (void) detach_capi_interface(&cuser);
- devfs_unregister_chrdev(capi_major, "capi20");
- devfs_unregister_chrdev(capi_rawmajor, "capi/r%d");
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- if (alloc_init() < 0) {
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- unsigned int j;
- devfs_unregister_chrdev(capi_rawmajor, "capi/r%d");
- for (j = 0; j < CAPINC_NR_PORTS; j++) {
- char devname[32];
- sprintf(devname, "capi/r%u", j);
- devfs_unregister(devfs_find_handle(NULL, devname, capi_rawmajor, j, DEVFS_SPECIAL_CHR, 0));
- }
- capinc_tty_exit();
- #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- (void) detach_capi_interface(&cuser);
- devfs_unregister_chrdev(capi_major, "capi20");
- devfs_unregister(devfs_find_handle(NULL, "capi20",
- capi_major, 0,
- DEVFS_SPECIAL_CHR, 0));
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- (void)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%sn",
- rev, capi_major, compileinfo);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static void __exit capi_exit(void)
- {
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- unsigned int j;
- #endif
- alloc_exit();
- (void)proc_exit();
- devfs_unregister_chrdev(capi_major, "capi20");
- devfs_unregister(devfs_find_handle(NULL, "isdn/capi20", capi_major, 0, DEVFS_SPECIAL_CHR, 0));
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- capinc_tty_exit();
- devfs_unregister_chrdev(capi_rawmajor, "capi/r%d");
- for (j = 0; j < CAPINC_NR_PORTS; j++) {
- char devname[32];
- sprintf(devname, "capi/r%u", j);
- devfs_unregister(devfs_find_handle(NULL, devname, capi_rawmajor, j, DEVFS_SPECIAL_CHR, 0));
- }
- #endif
- (void) detach_capi_interface(&cuser);
- printk(KERN_NOTICE "capi: Rev %s: unloadedn", rev);
- }
- module_init(capi_init);
- module_exit(capi_exit);