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/drivers/isdn/hardware/eicon/diddfunc.c

http://github.com/mirrors/linux
C | 115 lines | 75 code | 13 blank | 27 comment | 16 complexity | ab4d1eb3ddf4a9112f0c5ca12663286b MD5 | raw file
  1/* $Id: diddfunc.c,v 1.14.6.2 2004/08/28 20:03:53 armin Exp $
  2 *
  3 * DIDD Interface module for Eicon active cards.
  4 *
  5 * Functions are in dadapter.c
  6 *
  7 * Copyright 2002-2003 by Armin Schindler (mac@melware.de)
  8 * Copyright 2002-2003 Cytronics & Melware (info@melware.de)
  9 *
 10 * This software may be used and distributed according to the terms
 11 * of the GNU General Public License, incorporated herein by reference.
 12 */
 13
 14#include "platform.h"
 15#include "di_defs.h"
 16#include "dadapter.h"
 17#include "divasync.h"
 18
 19#define DBG_MINIMUM  (DL_LOG + DL_FTL + DL_ERR)
 20#define DBG_DEFAULT  (DBG_MINIMUM + DL_XLOG + DL_REG)
 21
 22
 23extern void DIVA_DIDD_Read(void *, int);
 24extern char *DRIVERRELEASE_DIDD;
 25static dword notify_handle;
 26static DESCRIPTOR _DAdapter;
 27
 28/*
 29 * didd callback function
 30 */
 31static void *didd_callback(void *context, DESCRIPTOR *adapter,
 32			   int removal)
 33{
 34	if (adapter->type == IDI_DADAPTER) {
 35		DBG_ERR(("Notification about IDI_DADAPTER change ! Oops."))
 36			return (NULL);
 37	} else if (adapter->type == IDI_DIMAINT) {
 38		if (removal) {
 39			DbgDeregister();
 40		} else {
 41			DbgRegister("DIDD", DRIVERRELEASE_DIDD, DBG_DEFAULT);
 42		}
 43	}
 44	return (NULL);
 45}
 46
 47/*
 48 * connect to didd
 49 */
 50static int __init connect_didd(void)
 51{
 52	int x = 0;
 53	int dadapter = 0;
 54	IDI_SYNC_REQ req;
 55	DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];
 56
 57	DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));
 58
 59	for (x = 0; x < MAX_DESCRIPTORS; x++) {
 60		if (DIDD_Table[x].type == IDI_DADAPTER) {	/* DADAPTER found */
 61			dadapter = 1;
 62			memcpy(&_DAdapter, &DIDD_Table[x], sizeof(_DAdapter));
 63			req.didd_notify.e.Req = 0;
 64			req.didd_notify.e.Rc =
 65				IDI_SYNC_REQ_DIDD_REGISTER_ADAPTER_NOTIFY;
 66			req.didd_notify.info.callback = (void *)didd_callback;
 67			req.didd_notify.info.context = NULL;
 68			_DAdapter.request((ENTITY *)&req);
 69			if (req.didd_notify.e.Rc != 0xff)
 70				return (0);
 71			notify_handle = req.didd_notify.info.handle;
 72		} else if (DIDD_Table[x].type == IDI_DIMAINT) {	/* MAINT found */
 73			DbgRegister("DIDD", DRIVERRELEASE_DIDD, DBG_DEFAULT);
 74		}
 75	}
 76	return (dadapter);
 77}
 78
 79/*
 80 * disconnect from didd
 81 */
 82static void __exit disconnect_didd(void)
 83{
 84	IDI_SYNC_REQ req;
 85
 86	req.didd_notify.e.Req = 0;
 87	req.didd_notify.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER_NOTIFY;
 88	req.didd_notify.info.handle = notify_handle;
 89	_DAdapter.request((ENTITY *)&req);
 90}
 91
 92/*
 93 * init
 94 */
 95int __init diddfunc_init(void)
 96{
 97	diva_didd_load_time_init();
 98
 99	if (!connect_didd()) {
100		DBG_ERR(("init: failed to connect to DIDD."))
101			diva_didd_load_time_finit();
102		return (0);
103	}
104	return (1);
105}
106
107/*
108 * finit
109 */
110void __exit diddfunc_finit(void)
111{
112	DbgDeregister();
113	disconnect_didd();
114	diva_didd_load_time_finit();
115}