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

   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
  23 extern void DIVA_DIDD_Read(void *, int);
  24 extern char *DRIVERRELEASE_DIDD;
  25 static dword notify_handle;
  26 static DESCRIPTOR _DAdapter;
  27
  28 /*
  29  * didd callback function
  30  */
  31 static 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  */
  50 static 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  */
  82 static 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  */
  95 int __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  */
 110 void __exit diddfunc_finit(void)
 111 {
 112         DbgDeregister();
 113         disconnect_didd();
 114         diva_didd_load_time_finit();
 115 }