/* $Id: divasfunc.c,v 1.23.4.2 2004/08/28 20:03:53 armin Exp $
 *
 * Low level driver for Eicon DIVA Server ISDN cards.
 *
 * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
 * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
 *
 * 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 "pc.h"
#include "di.h"
#include "io.h"
#include "divasync.h"
#include "diva.h"
#include "xdi_vers.h"

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

static int debugmask;

extern void DIVA_DIDD_Read(void *, int);

extern PISDN_ADAPTER IoAdapters[MAX_ADAPTER];

extern char *DRIVERRELEASE_DIVAS;

static dword notify_handle;
static DESCRIPTOR DAdapter;
static DESCRIPTOR MAdapter;

/* --------------------------------------------------------------------------
   MAINT driver connector section
   -------------------------------------------------------------------------- */
static void no_printf(unsigned char *x, ...)
{
        /* dummy debug function */
}

#include "debuglib.c"

/*
 * get the adapters serial number
 */
void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf)
{
        int contr = 0;

        if ((contr = ((IoAdapter->serialNo & 0xff000000) >> 24))) {
                sprintf(buf, "%d-%d",
                        IoAdapter->serialNo & 0x00ffffff, contr + 1);
        } else {
                sprintf(buf, "%d", IoAdapter->serialNo);
        }
}

/*
 * register a new adapter
 */
void diva_xdi_didd_register_adapter(int card)
{
        DESCRIPTOR d;
        IDI_SYNC_REQ req;

        if (card && ((card - 1) < MAX_ADAPTER) &&
            IoAdapters[card - 1] && Requests[card - 1]) {
                d.type = IoAdapters[card - 1]->Properties.DescType;
                d.request = Requests[card - 1];
                d.channels = IoAdapters[card - 1]->Properties.Channels;
                d.features = IoAdapters[card - 1]->Properties.Features;
                DBG_TRC(("DIDD register A(%d) channels=%d", card,
                         d.channels))
                        /* workaround for different Name in structure */
                        strlcpy(IoAdapters[card - 1]->Name,
                                IoAdapters[card - 1]->Properties.Name,
                                sizeof(IoAdapters[card - 1]->Name));
                req.didd_remove_adapter.e.Req = 0;
                req.didd_add_adapter.e.Rc = IDI_SYNC_REQ_DIDD_ADD_ADAPTER;
                req.didd_add_adapter.info.descriptor = (void *) &d;
                DAdapter.request((ENTITY *)&req);
                if (req.didd_add_adapter.e.Rc != 0xff) {
                        DBG_ERR(("DIDD register A(%d) failed !", card))
                                }
                IoAdapters[card - 1]->os_trap_nfy_Fnc = NULL;
        }
}

/*
 * remove an adapter
 */
void diva_xdi_didd_remove_adapter(int card)
{
        IDI_SYNC_REQ req;
        ADAPTER *a = &IoAdapters[card - 1]->a;

        IoAdapters[card - 1]->os_trap_nfy_Fnc = NULL;
        DBG_TRC(("DIDD de-register A(%d)", card))
                req.didd_remove_adapter.e.Req = 0;
        req.didd_remove_adapter.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER;
        req.didd_remove_adapter.info.p_request =
                (IDI_CALL) Requests[card - 1];
        DAdapter.request((ENTITY *)&req);
        memset(&(a->IdTable), 0x00, 256);
}

/*
 * start debug
 */
static void start_dbg(void)
{
        DbgRegister("DIVAS", DRIVERRELEASE_DIVAS, (debugmask) ? debugmask : DBG_DEFAULT);
        DBG_LOG(("DIVA ISDNXDI BUILD (%s[%s])",
                 DIVA_BUILD, diva_xdi_common_code_build))
                }

/*
 * stop debug
 */
static void stop_dbg(void)
{
        DbgDeregister();
        memset(&MAdapter, 0, sizeof(MAdapter));
        dprintf = no_printf;
}

/*
 * 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);
        }

        if (adapter->type == IDI_DIMAINT) {
                if (removal) {
                        stop_dbg();
                } else {
                        memcpy(&MAdapter, adapter, sizeof(MAdapter));
                        dprintf = (DIVA_DI_PRINTF) MAdapter.request;
                        start_dbg();
                }
        }
        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) {
                                stop_dbg();
                                return (0);
                        }
                        notify_handle = req.didd_notify.info.handle;
                } else if (DIDD_Table[x].type == IDI_DIMAINT) { /* MAINT found */
                        memcpy(&MAdapter, &DIDD_Table[x], sizeof(DAdapter));
                        dprintf = (DIVA_DI_PRINTF) MAdapter.request;
                        start_dbg();
                }
        }

        if (!dadapter) {
                stop_dbg();
        }

        return (dadapter);
}

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

        stop_dbg();

        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 divasfunc_init(int dbgmask)
{
        char *version;

        debugmask = dbgmask;

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

        version = diva_xdi_common_code_build;

        divasa_xdi_driver_entry();

        return (1);
}

/*
 * exit
 */
void divasfunc_exit(void)
{
        divasa_xdi_driver_unload();
        disconnect_didd();
}