ircomm_tty.h

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/*********************************************************************
 *                
 * Filename:      ircomm_tty.h
 * Version:       
 * Description:   
 * Status:        Experimental.
 * Author:        Dag Brattli <[email protected]>
 * Created at:    Sun Jun  6 23:24:22 1999
 * Modified at:   Fri Jan 28 13:16:57 2000
 * Modified by:   Dag Brattli <[email protected]>
 * 
 *     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)

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

    int state;                /* Connect state */

    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;

    __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;

    struct timer_list watchdog_timer;
    struct work_struct  tqueue;

    /* Protect concurent access to :
     *  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);
extern int ircomm_tty_tiocmset(struct tty_struct *tty,
                   unsigned int set, unsigned int clear);
extern int ircomm_tty_ioctl(struct tty_struct *tty, 
                unsigned int cmd, unsigned long arg);
extern void ircomm_tty_set_termios(struct tty_struct *tty, 
                   struct ktermios *old_termios);

#endif