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

   1 /* $Id: idifunc.c,v 1.14.4.4 2004/08/28 20:03:53 armin Exp $
   2  *
   3  * Driver for Eicon DIVA Server ISDN cards.
   4  * User Mode IDI Interface
   5  *
   6  * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
   7  * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
   8  *
   9  * This software may be used and distributed according to the terms
  10  * of the GNU General Public License, incorporated herein by reference.
  11  */
  12
  13 #include "platform.h"
  14 #include "di_defs.h"
  15 #include "divasync.h"
  16 #include "um_xdi.h"
  17 #include "um_idi.h"
  18
  19 #define DBG_MINIMUM  (DL_LOG + DL_FTL + DL_ERR)
  20 #define DBG_DEFAULT  (DBG_MINIMUM + DL_XLOG + DL_REG)
  21
  22 extern char *DRIVERRELEASE_IDI;
  23
  24 extern void DIVA_DIDD_Read(void *, int);
  25 extern int diva_user_mode_idi_create_adapter(const DESCRIPTOR *, int);
  26 extern void diva_user_mode_idi_remove_adapter(int);
  27
  28 static dword notify_handle;
  29 static DESCRIPTOR DAdapter;
  30 static DESCRIPTOR MAdapter;
  31
  32 static void no_printf(unsigned char *x, ...)
  33 {
  34         /* dummy debug function */
  35 }
  36
  37 #include "debuglib.c"
  38
  39 /*
  40  * stop debug
  41  */
  42 static void stop_dbg(void)
  43 {
  44         DbgDeregister();
  45         memset(&MAdapter, 0, sizeof(MAdapter));
  46         dprintf = no_printf;
  47 }
  48
  49 typedef struct _udiva_card {
  50         struct list_head list;
  51         int Id;
  52         DESCRIPTOR d;
  53 } udiva_card;
  54
  55 static LIST_HEAD(cards);
  56 static diva_os_spin_lock_t ll_lock;
  57
  58 /*
  59  * find card in list
  60  */
  61 static udiva_card *find_card_in_list(DESCRIPTOR *d)
  62 {
  63         udiva_card *card;
  64         struct list_head *tmp;
  65         diva_os_spin_lock_magic_t old_irql;
  66
  67         diva_os_enter_spin_lock(&ll_lock, &old_irql, "find card");
  68         list_for_each(tmp, &cards) {
  69                 card = list_entry(tmp, udiva_card, list);
  70                 if (card->d.request == d->request) {
  71                         diva_os_leave_spin_lock(&ll_lock, &old_irql,
  72                                                 "find card");
  73                         return (card);
  74                 }
  75         }
  76         diva_os_leave_spin_lock(&ll_lock, &old_irql, "find card");
  77         return ((udiva_card *) NULL);
  78 }
  79
  80 /*
  81  * new card
  82  */
  83 static void um_new_card(DESCRIPTOR *d)
  84 {
  85         int adapter_nr = 0;
  86         udiva_card *card = NULL;
  87         IDI_SYNC_REQ sync_req;
  88         diva_os_spin_lock_magic_t old_irql;
  89
  90         if (!(card = diva_os_malloc(0, sizeof(udiva_card)))) {
  91                 DBG_ERR(("cannot get buffer for card"));
  92                 return;
  93         }
  94         memcpy(&card->d, d, sizeof(DESCRIPTOR));
  95         sync_req.xdi_logical_adapter_number.Req = 0;
  96         sync_req.xdi_logical_adapter_number.Rc =
  97                 IDI_SYNC_REQ_XDI_GET_LOGICAL_ADAPTER_NUMBER;
  98         card->d.request((ENTITY *)&sync_req);
  99         adapter_nr =
 100                 sync_req.xdi_logical_adapter_number.info.logical_adapter_number;
 101         card->Id = adapter_nr;
 102         if (!(diva_user_mode_idi_create_adapter(d, adapter_nr))) {
 103                 diva_os_enter_spin_lock(&ll_lock, &old_irql, "add card");
 104                 list_add_tail(&card->list, &cards);
 105                 diva_os_leave_spin_lock(&ll_lock, &old_irql, "add card");
 106         } else {
 107                 DBG_ERR(("could not create user mode idi card %d",
 108                          adapter_nr));
 109                 diva_os_free(0, card);
 110         }
 111 }
 112
 113 /*
 114  * remove card
 115  */
 116 static void um_remove_card(DESCRIPTOR *d)
 117 {
 118         diva_os_spin_lock_magic_t old_irql;
 119         udiva_card *card = NULL;
 120
 121         if (!(card = find_card_in_list(d))) {
 122                 DBG_ERR(("cannot find card to remove"));
 123                 return;
 124         }
 125         diva_user_mode_idi_remove_adapter(card->Id);
 126         diva_os_enter_spin_lock(&ll_lock, &old_irql, "remove card");
 127         list_del(&card->list);
 128         diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove card");
 129         DBG_LOG(("idi proc entry removed for card %d", card->Id));
 130         diva_os_free(0, card);
 131 }
 132
 133 /*
 134  * remove all adapter
 135  */
 136 static void __exit remove_all_idi_proc(void)
 137 {
 138         udiva_card *card;
 139         diva_os_spin_lock_magic_t old_irql;
 140
 141 rescan:
 142         diva_os_enter_spin_lock(&ll_lock, &old_irql, "remove all");
 143         if (!list_empty(&cards)) {
 144                 card = list_entry(cards.next, udiva_card, list);
 145                 list_del(&card->list);
 146                 diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove all");
 147                 diva_user_mode_idi_remove_adapter(card->Id);
 148                 diva_os_free(0, card);
 149                 goto rescan;
 150         }
 151         diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove all");
 152 }
 153
 154 /*
 155  * DIDD notify callback
 156  */
 157 static void *didd_callback(void *context, DESCRIPTOR *adapter,
 158                            int removal)
 159 {
 160         if (adapter->type == IDI_DADAPTER) {
 161                 DBG_ERR(("Notification about IDI_DADAPTER change ! Oops."));
 162                 return (NULL);
 163         } else if (adapter->type == IDI_DIMAINT) {
 164                 if (removal) {
 165                         stop_dbg();
 166                 } else {
 167                         memcpy(&MAdapter, adapter, sizeof(MAdapter));
 168                         dprintf = (DIVA_DI_PRINTF) MAdapter.request;
 169                         DbgRegister("User IDI", DRIVERRELEASE_IDI, DBG_DEFAULT);
 170                 }
 171         } else if ((adapter->type > 0) && (adapter->type < 16)) {       /* IDI Adapter */
 172                 if (removal) {
 173                         um_remove_card(adapter);
 174                 } else {
 175                         um_new_card(adapter);
 176                 }
 177         }
 178         return (NULL);
 179 }
 180
 181 /*
 182  * connect DIDD
 183  */
 184 static int __init connect_didd(void)
 185 {
 186         int x = 0;
 187         int dadapter = 0;
 188         IDI_SYNC_REQ req;
 189         DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];
 190
 191         DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));
 192
 193         for (x = 0; x < MAX_DESCRIPTORS; x++) {
 194                 if (DIDD_Table[x].type == IDI_DADAPTER) {       /* DADAPTER found */
 195                         dadapter = 1;
 196                         memcpy(&DAdapter, &DIDD_Table[x], sizeof(DAdapter));
 197                         req.didd_notify.e.Req = 0;
 198                         req.didd_notify.e.Rc =
 199                                 IDI_SYNC_REQ_DIDD_REGISTER_ADAPTER_NOTIFY;
 200                         req.didd_notify.info.callback = (void *)didd_callback;
 201                         req.didd_notify.info.context = NULL;
 202                         DAdapter.request((ENTITY *)&req);
 203                         if (req.didd_notify.e.Rc != 0xff) {
 204                                 stop_dbg();
 205                                 return (0);
 206                         }
 207                         notify_handle = req.didd_notify.info.handle;
 208                 } else if (DIDD_Table[x].type == IDI_DIMAINT) { /* MAINT found */
 209                         memcpy(&MAdapter, &DIDD_Table[x], sizeof(DAdapter));
 210                         dprintf = (DIVA_DI_PRINTF) MAdapter.request;
 211                         DbgRegister("User IDI", DRIVERRELEASE_IDI, DBG_DEFAULT);
 212                 } else if ((DIDD_Table[x].type > 0)
 213                            && (DIDD_Table[x].type < 16)) {      /* IDI Adapter found */
 214                         um_new_card(&DIDD_Table[x]);
 215                 }
 216         }
 217
 218         if (!dadapter) {
 219                 stop_dbg();
 220         }
 221
 222         return (dadapter);
 223 }
 224
 225 /*
 226  *  Disconnect from DIDD
 227  */
 228 static void __exit disconnect_didd(void)
 229 {
 230         IDI_SYNC_REQ req;
 231
 232         stop_dbg();
 233
 234         req.didd_notify.e.Req = 0;
 235         req.didd_notify.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER_NOTIFY;
 236         req.didd_notify.info.handle = notify_handle;
 237         DAdapter.request((ENTITY *)&req);
 238 }
 239
 240 /*
 241  * init
 242  */
 243 int __init idifunc_init(void)
 244 {
 245         diva_os_initialize_spin_lock(&ll_lock, "idifunc");
 246
 247         if (diva_user_mode_idi_init()) {
 248                 DBG_ERR(("init: init failed."));
 249                 return (0);
 250         }
 251
 252         if (!connect_didd()) {
 253                 diva_user_mode_idi_finit();
 254                 DBG_ERR(("init: failed to connect to DIDD."));
 255                 return (0);
 256         }
 257         return (1);
 258 }
 259
 260 /*
 261  * finit
 262  */
 263 void __exit idifunc_finit(void)
 264 {
 265         diva_user_mode_idi_finit();
 266         disconnect_didd();
 267         remove_all_idi_proc();
 268 }