diddfunc.c

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/* $Id: diddfunc.c,v 1.14.6.2 2004/08/28 20:03:53 armin Exp $
 *
 * DIDD Interface module for Eicon active cards.
 *
 * Functions are in dadapter.c
 *
 * Copyright 2002-2003 by Armin Schindler ([email protected])
 * Copyright 2002-2003 Cytronics & Melware ([email protected])
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 */

#include "platform.h"
#include "di_defs.h"
#include "dadapter.h"
#include "divasync.h"

#define DBG_MINIMUM  (DL_LOG + DL_FTL + DL_ERR)
#define DBG_DEFAULT  (DBG_MINIMUM + DL_XLOG + DL_REG)


extern void DIVA_DIDD_Read(void *, int);
extern char *DRIVERRELEASE_DIDD;
static dword notify_handle;
static DESCRIPTOR _DAdapter;

/*
 * didd callback function
 */
static void *didd_callback(void *context, DESCRIPTOR *adapter,
               int removal)
{
    if (adapter->type == IDI_DADAPTER) {
        DBG_ERR(("Notification about IDI_DADAPTER change ! Oops."))
            return (NULL);
    } else if (adapter->type == IDI_DIMAINT) {
        if (removal) {
            DbgDeregister();
        } else {
            DbgRegister("DIDD", DRIVERRELEASE_DIDD, DBG_DEFAULT);
        }
    }
    return (NULL);
}

/*
 * connect to didd
 */
static int __init connect_didd(void)
{
    int x = 0;
    int dadapter = 0;
    IDI_SYNC_REQ req;
    DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];

    DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));

    for (x = 0; x < MAX_DESCRIPTORS; x++) {
        if (DIDD_Table[x].type == IDI_DADAPTER) {   /* DADAPTER found */
            dadapter = 1;
            memcpy(&_DAdapter, &DIDD_Table[x], sizeof(_DAdapter));
            req.didd_notify.e.Req = 0;
            req.didd_notify.e.Rc =
                IDI_SYNC_REQ_DIDD_REGISTER_ADAPTER_NOTIFY;
            req.didd_notify.info.callback = (void *)didd_callback;
            req.didd_notify.info.context = NULL;
            _DAdapter.request((ENTITY *)&req);
            if (req.didd_notify.e.Rc != 0xff)
                return (0);
            notify_handle = req.didd_notify.info.handle;
        } else if (DIDD_Table[x].type == IDI_DIMAINT) { /* MAINT found */
            DbgRegister("DIDD", DRIVERRELEASE_DIDD, DBG_DEFAULT);
        }
    }
    return (dadapter);
}

/*
 * disconnect from didd
 */
static void __exit disconnect_didd(void)
{
    IDI_SYNC_REQ req;

    req.didd_notify.e.Req = 0;
    req.didd_notify.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER_NOTIFY;
    req.didd_notify.info.handle = notify_handle;
    _DAdapter.request((ENTITY *)&req);
}

/*
 * init
 */
int __init diddfunc_init(void)
{
    diva_didd_load_time_init();

    if (!connect_didd()) {
        DBG_ERR(("init: failed to connect to DIDD."))
            diva_didd_load_time_finit();
        return (0);
    }
    return (1);
}

/*
 * finit
 */
void __exit diddfunc_finit(void)
{
    DbgDeregister();
    disconnect_didd();
    diva_didd_load_time_finit();
}