root/include/net/irda/ircomm_tty.h

INCLUDED FROM

/*********************************************************************
 *                
 * Filename:      ircomm_tty.h
 * Version:       
 * Description:   
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Jun  6 23:24:22 1999
 * Modified at:   Fri Jan 28 13:16:57 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * 
 *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
 *     
 *     This program is free software; you can redistribute it and/or 
 *     modify it under the terms of the GNU General Public License as 
 *     published by the Free Software Foundation; either version 2 of 
 *     the License, or (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License 
 *     along with this program; if not, write to the Free Software 
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 *     MA 02111-1307 USA
 *     
 ********************************************************************/

#ifndef IRCOMM_TTY_H
#define IRCOMM_TTY_H

#include <linux/serial.h>
#include <linux/termios.h>
#include <linux/timer.h>
#include <linux/tty.h>          /* struct tty_struct */

#include <net/irda/irias_object.h>
#include <net/irda/ircomm_core.h>
#include <net/irda/ircomm_param.h>

#define IRCOMM_TTY_PORTS 32
#define IRCOMM_TTY_MAGIC 0x3432
#define IRCOMM_TTY_MAJOR 161
#define IRCOMM_TTY_MINOR 0

/* This is used as an initial value to max_header_size before the proper
 * value is filled in (5 for ttp, 4 for lmp). This allow us to detect
 * the state of the underlying connection. - Jean II */
#define IRCOMM_TTY_HDR_UNINITIALISED    16
/* Same for payload size. See qos.c for the smallest max data size */
#define IRCOMM_TTY_DATA_UNINITIALISED   (64 - IRCOMM_TTY_HDR_UNINITIALISED)

/* Those are really defined in include/linux/serial.h - Jean II */
#define ASYNC_B_INITIALIZED     31      /* Serial port was initialized */
#define ASYNC_B_NORMAL_ACTIVE   29      /* Normal device is active */
#define ASYNC_B_CLOSING         27      /* Serial port is closing */

/*
 * IrCOMM TTY driver state
 */
struct ircomm_tty_cb {
        irda_queue_t queue;            /* Must be first */
        magic_t magic;

        int state;                /* Connect state */

        struct tty_struct *tty;
        struct ircomm_cb *ircomm; /* IrCOMM layer instance */

        struct sk_buff *tx_skb;   /* Transmit buffer */
        struct sk_buff *ctrl_skb; /* Control data buffer */

        /* Parameters */
        struct ircomm_params settings;

        __u8 service_type;        /* The service that we support */
        int client;               /* True if we are a client */
        LOCAL_FLOW flow;          /* IrTTP flow status */

        int line;
        unsigned long flags;

        __u8 dlsap_sel;
        __u8 slsap_sel;

        __u32 saddr;
        __u32 daddr;

        __u32 max_data_size;   /* Max data we can transmit in one packet */
        __u32 max_header_size; /* The amount of header space we must reserve */
        __u32 tx_data_size;     /* Max data size of current tx_skb */

        struct iriap_cb *iriap; /* Instance used for querying remote IAS */
        struct ias_object* obj;
        void *skey;
        void *ckey;

        wait_queue_head_t open_wait;
        wait_queue_head_t close_wait;
        struct timer_list watchdog_timer;
        struct work_struct  tqueue;

        unsigned short    close_delay;
        unsigned short    closing_wait; /* time to wait before closing */

        int  open_count;
        int  blocked_open;      /* # of blocked opens */

        /* Protect concurent access to :
         *      o self->open_count
         *      o self->ctrl_skb
         *      o self->tx_skb
         * Maybe other things may gain to be protected as well...
         * Jean II */
        spinlock_t spinlock;
};

void ircomm_tty_start(struct tty_struct *tty);
void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self);

extern int ircomm_tty_tiocmget(struct tty_struct *tty, struct file *file);
extern int ircomm_tty_tiocmset(struct tty_struct *tty, struct file *file,
                               unsigned int set, unsigned int clear);
extern int ircomm_tty_ioctl(struct tty_struct *tty, struct file *file, 
                            unsigned int cmd, unsigned long arg);
extern void ircomm_tty_set_termios(struct tty_struct *tty, 
                                   struct ktermios *old_termios);

#endif