git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/arlan-main.c

   1 /*
   2  *  Copyright (C) 1997 Cullen Jennings
   3  *  Copyright (C) 1998 Elmer Joandiu, elmer@ylenurme.ee
   4  *  GNU General Public License applies
   5  * This module provides support for the Arlan 655 card made by Aironet
   6  */
   7
   8 #include "arlan.h"
   9
  10 #if BITS_PER_LONG != 32
  11 #  error FIXME: this driver requires a 32-bit platform
  12 #endif
  13
  14 static const char *arlan_version = "C.Jennigs 97 & Elmer.Joandi@ut.ee  Oct'98, http://www.ylenurme.ee/~elmer/655/";
  15
  16 struct net_device *arlan_device[MAX_ARLANS];
  17
  18 static int SID = SIDUNKNOWN;
  19 static int radioNodeId = radioNodeIdUNKNOWN;
  20 static char encryptionKey[12] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'};
  21 int arlan_debug = debugUNKNOWN;
  22 static int spreadingCode = spreadingCodeUNKNOWN;
  23 static int channelNumber = channelNumberUNKNOWN;
  24 static int channelSet = channelSetUNKNOWN;
  25 static int systemId = systemIdUNKNOWN;
  26 static int registrationMode = registrationModeUNKNOWN;
  27 static int keyStart;
  28 static int tx_delay_ms;
  29 static int retries = 5;
  30 static int tx_queue_len = 1;
  31 static int arlan_EEPROM_bad;
  32
  33 #ifdef ARLAN_DEBUGGING
  34
  35 static int testMemory = testMemoryUNKNOWN;
  36 static int irq = irqUNKNOWN;
  37 static int txScrambled = 1;
  38 static int mdebug;
  39
  40 module_param(irq, int, 0);
  41 module_param(mdebug, int, 0);
  42 module_param(testMemory, int, 0);
  43 module_param(txScrambled, int, 0);
  44 MODULE_PARM_DESC(irq, "(unused)");
  45 MODULE_PARM_DESC(testMemory, "(unused)");
  46 MODULE_PARM_DESC(mdebug, "Arlan multicast debugging (0-1)");
  47 #endif
  48
  49 module_param_named(debug, arlan_debug, int, 0);
  50 module_param(spreadingCode, int, 0);
  51 module_param(channelNumber, int, 0);
  52 module_param(channelSet, int, 0);
  53 module_param(systemId, int, 0);
  54 module_param(registrationMode, int, 0);
  55 module_param(radioNodeId, int, 0);
  56 module_param(SID, int, 0);
  57 module_param(keyStart, int, 0);
  58 module_param(tx_delay_ms, int, 0);
  59 module_param(retries, int, 0);
  60 module_param(tx_queue_len, int, 0);
  61 module_param_named(EEPROM_bad, arlan_EEPROM_bad, int, 0);
  62 MODULE_PARM_DESC(debug, "Arlan debug enable (0-1)");
  63 MODULE_PARM_DESC(retries, "Arlan maximum packet retransmisions");
  64 #ifdef ARLAN_ENTRY_EXIT_DEBUGGING
  65 static int arlan_entry_debug;
  66 static int arlan_exit_debug;
  67 static int arlan_entry_and_exit_debug;
  68 module_param_named(entry_debug, arlan_entry_debug, int, 0);
  69 module_param_named(exit_debug, arlan_exit_debug, int, 0);
  70 module_param_named(entry_and_exit_debug, arlan_entry_and_exit_debug, int, 0);
  71 MODULE_PARM_DESC(entry_debug, "Arlan driver function entry debugging");
  72 MODULE_PARM_DESC(exit_debug, "Arlan driver function exit debugging");
  73 MODULE_PARM_DESC(entry_and_exit_debug, "Arlan driver function entry and exit debugging");
  74 #endif
  75
  76 struct arlan_conf_stru arlan_conf[MAX_ARLANS];
  77 static int arlans_found;
  78
  79 static  int     arlan_open(struct net_device *dev);
  80 static  int     arlan_tx(struct sk_buff *skb, struct net_device *dev);
  81 static  irqreturn_t arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  82 static  int     arlan_close(struct net_device *dev);
  83 static  struct net_device_stats *
  84                 arlan_statistics                (struct net_device *dev);
  85 static  void    arlan_set_multicast             (struct net_device *dev);
  86 static  int     arlan_hw_tx                     (struct net_device* dev, char *buf, int length );
  87 static  int     arlan_hw_config                 (struct net_device * dev);
  88 static  void    arlan_tx_done_interrupt         (struct net_device * dev, int status);
  89 static  void    arlan_rx_interrupt              (struct net_device * dev, u_char rxStatus, u_short, u_short);
  90 static  void    arlan_process_interrupt         (struct net_device * dev);
  91 static  void    arlan_tx_timeout                (struct net_device *dev);
  92
  93 static inline long us2ticks(int us)
  94 {
  95         return us * (1000000 / HZ);
  96 }
  97
  98
  99 #ifdef ARLAN_ENTRY_EXIT_DEBUGGING
 100 #define ARLAN_DEBUG_ENTRY(name) \
 101         {\
 102         struct timeval timev;\
 103         do_gettimeofday(&timev);\
 104                 if (arlan_entry_debug || arlan_entry_and_exit_debug)\
 105                         printk("--->>>" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec));\
 106         }
 107 #define ARLAN_DEBUG_EXIT(name) \
 108         {\
 109         struct timeval timev;\
 110         do_gettimeofday(&timev);\
 111                 if (arlan_exit_debug || arlan_entry_and_exit_debug)\
 112                         printk("<<<---" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec) );\
 113         }
 114 #else
 115 #define ARLAN_DEBUG_ENTRY(name)
 116 #define ARLAN_DEBUG_EXIT(name)
 117 #endif
 118
 119
 120 #define arlan_interrupt_ack(dev)\
 121         clearClearInterrupt(dev);\
 122         setClearInterrupt(dev);
 123
 124 static inline int arlan_drop_tx(struct net_device *dev)
 125 {
 126         struct arlan_private *priv = netdev_priv(dev);
 127
 128         priv->stats.tx_errors++;
 129         if (priv->Conf->tx_delay_ms)
 130         {
 131                 priv->tx_done_delayed = jiffies + priv->Conf->tx_delay_ms * HZ / 1000 + 1;
 132         }
 133         else
 134         {
 135                 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
 136                 TXHEAD(dev).offset = 0;
 137                 TXTAIL(dev).offset = 0;
 138                 priv->txLast = 0;
 139                 priv->bad = 0;
 140                 if (!priv->under_reset && !priv->under_config)
 141                         netif_wake_queue (dev);
 142         }
 143         return 1;
 144 }
 145
 146
 147 int arlan_command(struct net_device *dev, int command_p)
 148 {
 149         struct arlan_private *priv = netdev_priv(dev);
 150         volatile struct arlan_shmem __iomem *arlan = priv->card;
 151         struct arlan_conf_stru *conf = priv->Conf;
 152         int udelayed = 0;
 153         int i = 0;
 154         unsigned long flags;
 155
 156         ARLAN_DEBUG_ENTRY("arlan_command");
 157
 158         if (priv->card_polling_interval)
 159                 priv->card_polling_interval = 1;
 160
 161         if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
 162                 printk(KERN_DEBUG "arlan_command, %lx commandByte %x waiting %lx incoming %x \n",
 163                 jiffies, READSHMB(arlan->commandByte),
 164                        priv->waiting_command_mask, command_p);
 165
 166         priv->waiting_command_mask |= command_p;
 167
 168         if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
 169                 if (time_after(jiffies, priv->lastReset + 5 * HZ))
 170                         priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
 171
 172         if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ACK)
 173         {
 174                 arlan_interrupt_ack(dev);
 175                 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ACK;
 176         }
 177         if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ENABLE)
 178         {
 179                 setInterruptEnable(dev);
 180                 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ENABLE;
 181         }
 182
 183         /* Card access serializing lock */
 184         spin_lock_irqsave(&priv->lock, flags);
 185
 186         /* Check cards status and waiting */
 187
 188         if (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
 189         {
 190                 while (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
 191                 {
 192                         if (READSHMB(arlan->resetFlag) ||
 193                                 READSHMB(arlan->commandByte))   /* ||
 194                                                                    (readControlRegister(dev) & ARLAN_ACCESS))
 195                                                                  */
 196                                 udelay(40);
 197                         else
 198                                 priv->waiting_command_mask &= ~(ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW);
 199
 200                         udelayed++;
 201
 202                         if (priv->waiting_command_mask & ARLAN_COMMAND_LONG_WAIT_NOW)
 203                         {
 204                                 if (udelayed * 40 > 1000000)
 205                                 {
 206                                         printk(KERN_ERR "%s long wait too long \n", dev->name);
 207                                         priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
 208                                         break;
 209                                 }
 210                         }
 211                         else if (priv->waiting_command_mask & ARLAN_COMMAND_WAIT_NOW)
 212                         {
 213                                 if (udelayed * 40 > 1000)
 214                                 {
 215                                         printk(KERN_ERR "%s short wait too long \n", dev->name);
 216                                         goto bad_end;
 217                                 }
 218                         }
 219                 }
 220         }
 221         else
 222         {
 223                 i = 0;
 224                 while ((READSHMB(arlan->resetFlag) ||
 225                         READSHMB(arlan->commandByte)) &&
 226                         conf->pre_Command_Wait > (i++) * 10)
 227                         udelay(10);
 228
 229
 230                 if ((READSHMB(arlan->resetFlag) ||
 231                         READSHMB(arlan->commandByte)) &&
 232                         !(priv->waiting_command_mask & ARLAN_COMMAND_RESET))
 233                 {
 234                         goto card_busy_end;
 235                 }
 236         }
 237         if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
 238                 priv->under_reset = 1;
 239         if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
 240                 priv->under_config = 1;
 241
 242         /* Issuing command */
 243         arlan_lock_card_access(dev);
 244         if (priv->waiting_command_mask & ARLAN_COMMAND_POWERUP)
 245         {
 246         //     if (readControlRegister(dev) & (ARLAN_ACCESS && ARLAN_POWER))
 247                 setPowerOn(dev);
 248                 arlan_interrupt_lancpu(dev);
 249                 priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERUP;
 250                 priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
 251                 priv->card_polling_interval = HZ / 10;
 252         }
 253         else if (priv->waiting_command_mask & ARLAN_COMMAND_ACTIVATE)
 254         {
 255                 WRITESHMB(arlan->commandByte, ARLAN_COM_ACTIVATE);
 256                 arlan_interrupt_lancpu(dev);
 257                 priv->waiting_command_mask &= ~ARLAN_COMMAND_ACTIVATE;
 258                 priv->card_polling_interval = HZ / 10;
 259         }
 260         else if (priv->waiting_command_mask & ARLAN_COMMAND_RX_ABORT)
 261         {
 262                 if (priv->rx_command_given)
 263                 {
 264                         WRITESHMB(arlan->commandByte, ARLAN_COM_RX_ABORT);
 265                         arlan_interrupt_lancpu(dev);
 266                         priv->rx_command_given = 0;
 267                 }
 268                 priv->waiting_command_mask &= ~ARLAN_COMMAND_RX_ABORT;
 269                 priv->card_polling_interval = 1;
 270         }
 271         else if (priv->waiting_command_mask & ARLAN_COMMAND_TX_ABORT)
 272         {
 273                 if (priv->tx_command_given)
 274                 {
 275                         WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ABORT);
 276                         arlan_interrupt_lancpu(dev);
 277                         priv->tx_command_given = 0;
 278                 }
 279                 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX_ABORT;
 280                 priv->card_polling_interval = 1;
 281         }
 282         else if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
 283         {
 284                 priv->under_reset=1;
 285                 netif_stop_queue (dev);
 286
 287                 arlan_drop_tx(dev);
 288                 if (priv->tx_command_given || priv->rx_command_given)
 289                 {
 290                         printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
 291                 }
 292                 netif_stop_queue (dev);
 293                 if (arlan_debug & ARLAN_DEBUG_RESET)
 294                         printk(KERN_ERR "%s: Doing chip reset\n", dev->name);
 295                 priv->lastReset = jiffies;
 296                 WRITESHM(arlan->commandByte, 0, u_char);
 297                 /* hold card in reset state */
 298                 setHardwareReset(dev);
 299                 /* set reset flag and then release reset */
 300                 WRITESHM(arlan->resetFlag, 0xff, u_char);
 301                 clearChannelAttention(dev);
 302                 clearHardwareReset(dev);
 303                 priv->card_polling_interval = HZ / 4;
 304                 priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
 305                 priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;
 306 //              priv->waiting_command_mask |= ARLAN_COMMAND_INT_RENABLE;
 307 //              priv->waiting_command_mask |= ARLAN_COMMAND_RX;
 308         }
 309         else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RACK)
 310         {
 311                 clearHardwareReset(dev);
 312                 clearClearInterrupt(dev);
 313                 setClearInterrupt(dev);
 314                 setInterruptEnable(dev);
 315                 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RACK;
 316                 priv->waiting_command_mask |= ARLAN_COMMAND_CONF;
 317                 priv->under_config = 1;
 318                 priv->under_reset = 0;
 319         }
 320         else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RENABLE)
 321         {
 322                 setInterruptEnable(dev);
 323                 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RENABLE;
 324         }
 325         else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
 326         {
 327                 if (priv->tx_command_given || priv->rx_command_given)
 328                 {
 329                         printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
 330                 }
 331                 arlan_drop_tx(dev);
 332                 setInterruptEnable(dev);
 333                 arlan_hw_config(dev);
 334                 arlan_interrupt_lancpu(dev);
 335                 priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF;
 336                 priv->card_polling_interval = HZ / 10;
 337 //              priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;
 338 //              priv->waiting_command_mask |= ARLAN_COMMAND_INT_ENABLE;
 339                 priv->waiting_command_mask |= ARLAN_COMMAND_CONF_WAIT;
 340         }
 341         else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF_WAIT)
 342         {
 343                 if (READSHMB(arlan->configuredStatusFlag) != 0 &&
 344                         READSHMB(arlan->diagnosticInfo) == 0xff)
 345                 {
 346                         priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF_WAIT;
 347                         priv->waiting_command_mask |= ARLAN_COMMAND_RX;
 348                         priv->waiting_command_mask |= ARLAN_COMMAND_TBUSY_CLEAR;
 349                         priv->card_polling_interval = HZ / 10;
 350                         priv->tx_command_given = 0;
 351                         priv->under_config = 0;
 352                 }
 353                 else
 354                 {
 355                         priv->card_polling_interval = 1;
 356                         if (arlan_debug & ARLAN_DEBUG_TIMING)
 357                                 printk(KERN_ERR "configure delayed \n");
 358                 }
 359         }
 360         else if (priv->waiting_command_mask & ARLAN_COMMAND_RX)
 361         {
 362                 if (!registrationBad(dev))
 363                 {
 364                         setInterruptEnable(dev);
 365                         memset_io(arlan->commandParameter, 0, 0xf);
 366                         WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_RX_ENABLE);
 367                         WRITESHMB(arlan->commandParameter[0], conf->rxParameter);
 368                         arlan_interrupt_lancpu(dev);
 369                         priv->rx_command_given = 0; // mnjah, bad
 370                         priv->waiting_command_mask &= ~ARLAN_COMMAND_RX;
 371                         priv->card_polling_interval = 1;
 372                 }
 373                 else
 374                         priv->card_polling_interval = 2;
 375         }
 376         else if (priv->waiting_command_mask & ARLAN_COMMAND_TBUSY_CLEAR)
 377         {
 378                 if ( !registrationBad(dev) &&
 379                      (netif_queue_stopped(dev) || !netif_running(dev)) )
 380                         {
 381                                 priv->waiting_command_mask &= ~ARLAN_COMMAND_TBUSY_CLEAR;
 382                                 netif_wake_queue (dev);
 383                         }
 384         }
 385         else if (priv->waiting_command_mask & ARLAN_COMMAND_TX)
 386         {
 387                 if (!test_and_set_bit(0, (void *) &priv->tx_command_given))
 388                 {
 389                         if (time_after(jiffies,
 390                                        priv->tx_last_sent + us2ticks(conf->rx_tweak1))
 391                             || time_before(jiffies,
 392                                            priv->last_rx_int_ack_time + us2ticks(conf->rx_tweak2)))
 393                         {
 394                                 setInterruptEnable(dev);
 395                                 memset_io(arlan->commandParameter, 0, 0xf);
 396                                 WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ENABLE | ARLAN_COM_INT);
 397                                 memcpy_toio(arlan->commandParameter, &TXLAST(dev), 14);
 398 //                              for ( i=1 ; i < 15 ; i++) printk("%02x:",READSHMB(arlan->commandParameter[i]));
 399                                 priv->tx_last_sent = jiffies;
 400                                 arlan_interrupt_lancpu(dev);
 401                                 priv->tx_command_given = 1;
 402                                 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
 403                                 priv->card_polling_interval = 1;
 404                         }
 405                         else
 406                         {
 407                                 priv->tx_command_given = 0;
 408                                 priv->card_polling_interval = 1;
 409                         }
 410                 }
 411                 else if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
 412                         printk(KERN_ERR "tx command when tx chain locked \n");
 413         }
 414         else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOPINT)
 415         {
 416                 {
 417                         WRITESHMB(arlan->commandByte, ARLAN_COM_NOP | ARLAN_COM_INT);
 418                 }
 419                 arlan_interrupt_lancpu(dev);
 420                 priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOPINT;
 421                 priv->card_polling_interval = HZ / 3;
 422         }
 423         else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOP)
 424         {
 425                 WRITESHMB(arlan->commandByte, ARLAN_COM_NOP);
 426                 arlan_interrupt_lancpu(dev);
 427                 priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOP;
 428                 priv->card_polling_interval = HZ / 3;
 429         }
 430         else if (priv->waiting_command_mask & ARLAN_COMMAND_SLOW_POLL)
 431         {
 432                 WRITESHMB(arlan->commandByte, ARLAN_COM_GOTO_SLOW_POLL);
 433                 arlan_interrupt_lancpu(dev);
 434                 priv->waiting_command_mask &= ~ARLAN_COMMAND_SLOW_POLL;
 435                 priv->card_polling_interval = HZ / 3;
 436         }
 437         else if (priv->waiting_command_mask & ARLAN_COMMAND_POWERDOWN)
 438         {
 439                 setPowerOff(dev);
 440                 if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
 441                         printk(KERN_WARNING "%s: Arlan Going Standby\n", dev->name);
 442                 priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERDOWN;
 443                 priv->card_polling_interval = 3 * HZ;
 444         }
 445         arlan_unlock_card_access(dev);
 446         for (i = 0; READSHMB(arlan->commandByte) && i < 20; i++)
 447                 udelay(10);
 448         if (READSHMB(arlan->commandByte))
 449                 if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
 450                         printk(KERN_ERR "card busy leaving command %lx\n", priv->waiting_command_mask);
 451
 452         spin_unlock_irqrestore(&priv->lock, flags);
 453         ARLAN_DEBUG_EXIT("arlan_command");
 454         priv->last_command_buff_free_time = jiffies;
 455         return 0;
 456
 457 card_busy_end:
 458         if (time_after(jiffies, priv->last_command_buff_free_time + HZ))
 459                 priv->waiting_command_mask |= ARLAN_COMMAND_CLEAN_AND_RESET;
 460
 461         if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
 462                 printk(KERN_ERR "%s arlan_command card busy end \n", dev->name);
 463         spin_unlock_irqrestore(&priv->lock, flags);
 464         ARLAN_DEBUG_EXIT("arlan_command");
 465         return 1;
 466
 467 bad_end:
 468         printk(KERN_ERR "%s arlan_command bad end \n", dev->name);
 469
 470         spin_unlock_irqrestore(&priv->lock, flags);
 471         ARLAN_DEBUG_EXIT("arlan_command");
 472
 473         return -1;
 474 }
 475
 476 static inline void arlan_command_process(struct net_device *dev)
 477 {
 478         struct arlan_private *priv = netdev_priv(dev);
 479
 480         int times = 0;
 481         while (priv->waiting_command_mask && times < 8)
 482         {
 483                 if (priv->waiting_command_mask)
 484                 {
 485                         if (arlan_command(dev, 0))
 486                                 break;
 487                         times++;
 488                 }
 489                 /* if long command, we won't repeat trying */ ;
 490                 if (priv->card_polling_interval > 1)
 491                         break;
 492                 times++;
 493         }
 494 }
 495
 496
 497 static inline void arlan_retransmit_now(struct net_device *dev)
 498 {
 499         struct arlan_private *priv = netdev_priv(dev);
 500
 501
 502         ARLAN_DEBUG_ENTRY("arlan_retransmit_now");
 503         if (TXLAST(dev).offset == 0)
 504         {
 505                 if (TXHEAD(dev).offset)
 506                 {
 507                         priv->txLast = 0;
 508                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to head \n");
 509
 510                 }
 511                 else if (TXTAIL(dev).offset)
 512                 {
 513                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to tail \n");
 514                         priv->txLast = 1;
 515                 }
 516                 else
 517                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "ReTransmit buff empty");
 518                 netif_wake_queue (dev);
 519                 return;
 520
 521         }
 522         arlan_command(dev, ARLAN_COMMAND_TX);
 523
 524         priv->Conf->driverRetransmissions++;
 525         priv->retransmissions++;
 526
 527         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("Retransmit %d bytes \n", TXLAST(dev).length);
 528
 529         ARLAN_DEBUG_EXIT("arlan_retransmit_now");
 530 }
 531
 532
 533
 534 static void arlan_registration_timer(unsigned long data)
 535 {
 536         struct net_device *dev = (struct net_device *) data;
 537         struct arlan_private *priv = netdev_priv(dev);
 538         int bh_mark_needed = 0;
 539         int next_tick = 1;
 540         long lostTime = ((long)jiffies - (long)priv->registrationLastSeen)
 541                         * (1000/HZ);
 542
 543         if (registrationBad(dev))
 544         {
 545                 priv->registrationLostCount++;
 546                 if (lostTime > 7000 && lostTime < 7200)
 547                 {
 548                         printk(KERN_NOTICE "%s registration Lost \n", dev->name);
 549                 }
 550                 if (lostTime / priv->reRegisterExp > 2000)
 551                         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
 552                 if (lostTime / (priv->reRegisterExp) > 3500)
 553                         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
 554                 if (priv->reRegisterExp < 400)
 555                         priv->reRegisterExp += 2;
 556                 if (lostTime > 7200)
 557                 {
 558                         next_tick = HZ;
 559                         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
 560                 }
 561         }
 562         else
 563         {
 564                 if (priv->Conf->registrationMode && lostTime > 10000 &&
 565                         priv->registrationLostCount)
 566                 {
 567                         printk(KERN_NOTICE "%s registration is back after %ld milliseconds\n",
 568                                dev->name, lostTime);
 569                 }
 570                 priv->registrationLastSeen = jiffies;
 571                 priv->registrationLostCount = 0;
 572                 priv->reRegisterExp = 1;
 573                 if (!netif_running(dev) )
 574                         netif_wake_queue(dev);
 575                 if (time_after(priv->tx_last_sent,priv->tx_last_cleared) &&
 576                     time_after(jiffies, priv->tx_last_sent * 5*HZ) ){
 577                         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
 578                         priv->tx_last_cleared = jiffies;
 579                 }
 580         }
 581
 582
 583         if (!registrationBad(dev) && priv->ReTransmitRequested)
 584         {
 585                 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
 586                         printk(KERN_ERR "Retransmit from timer \n");
 587                 priv->ReTransmitRequested = 0;
 588                 arlan_retransmit_now(dev);
 589         }
 590         if (!registrationBad(dev) &&
 591                 time_after(jiffies, priv->tx_done_delayed) &&
 592                 priv->tx_done_delayed != 0)
 593         {
 594                 TXLAST(dev).offset = 0;
 595                 if (priv->txLast)
 596                         priv->txLast = 0;
 597                 else if (TXTAIL(dev).offset)
 598                         priv->txLast = 1;
 599                 if (TXLAST(dev).offset)
 600                 {
 601                         arlan_retransmit_now(dev);
 602                         dev->trans_start = jiffies;
 603                 }
 604                 if (!(TXHEAD(dev).offset && TXTAIL(dev).offset))
 605                 {
 606                         netif_wake_queue (dev);
 607                 }
 608                 priv->tx_done_delayed = 0;
 609                 bh_mark_needed = 1;
 610         }
 611         if (bh_mark_needed)
 612         {
 613                 netif_wake_queue (dev);
 614         }
 615         arlan_process_interrupt(dev);
 616
 617         if (next_tick < priv->card_polling_interval)
 618                 next_tick = priv->card_polling_interval;
 619
 620         priv->timer.expires = jiffies + next_tick;
 621
 622         add_timer(&priv->timer);
 623 }
 624
 625
 626 #ifdef ARLAN_DEBUGGING
 627
 628 static void arlan_print_registers(struct net_device *dev, int line)
 629 {
 630         struct arlan_private *priv = netdev_priv(dev);
 631         volatile struct arlan_shmem *arlan = priv->card;
 632
 633         u_char hostcpuLock, lancpuLock, controlRegister, cntrlRegImage,
 634                 txStatus, rxStatus, interruptInProgress, commandByte;
 635
 636
 637         ARLAN_DEBUG_ENTRY("arlan_print_registers");
 638         READSHM(interruptInProgress, arlan->interruptInProgress, u_char);
 639         READSHM(hostcpuLock, arlan->hostcpuLock, u_char);
 640         READSHM(lancpuLock, arlan->lancpuLock, u_char);
 641         READSHM(controlRegister, arlan->controlRegister, u_char);
 642         READSHM(cntrlRegImage, arlan->cntrlRegImage, u_char);
 643         READSHM(txStatus, arlan->txStatus, u_char);
 644         READSHM(rxStatus, arlan->rxStatus, u_char);
 645         READSHM(commandByte, arlan->commandByte, u_char);
 646
 647         printk(KERN_WARNING "line %04d IP %02x HL %02x LL %02x CB %02x CR %02x CRI %02x TX %02x RX %02x\n",
 648                 line, interruptInProgress, hostcpuLock, lancpuLock, commandByte,
 649                 controlRegister, cntrlRegImage, txStatus, rxStatus);
 650
 651         ARLAN_DEBUG_EXIT("arlan_print_registers");
 652 }
 653 #endif
 654
 655
 656 static int arlan_hw_tx(struct net_device *dev, char *buf, int length)
 657 {
 658         int i;
 659
 660         struct arlan_private *priv = netdev_priv(dev);
 661         volatile struct arlan_shmem __iomem *arlan = priv->card;
 662         struct arlan_conf_stru *conf = priv->Conf;
 663
 664         int tailStarts = 0x800;
 665         int headEnds = 0x0;
 666
 667
 668         ARLAN_DEBUG_ENTRY("arlan_hw_tx");
 669         if (TXHEAD(dev).offset)
 670                 headEnds = (((TXHEAD(dev).offset + TXHEAD(dev).length - offsetof(struct arlan_shmem, txBuffer)) / 64) + 1) * 64;
 671         if (TXTAIL(dev).offset)
 672                 tailStarts = 0x800 - (((TXTAIL(dev).offset - offsetof(struct arlan_shmem, txBuffer)) / 64) + 2) * 64;
 673
 674
 675         if (!TXHEAD(dev).offset && length < tailStarts)
 676         {
 677                 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
 678                         printk(KERN_ERR "TXHEAD insert, tailStart %d\n", tailStarts);
 679
 680                 TXHEAD(dev).offset =
 681                         offsetof(struct arlan_shmem, txBuffer);
 682                 TXHEAD(dev).length = length - ARLAN_FAKE_HDR_LEN;
 683                 for (i = 0; i < 6; i++)
 684                         TXHEAD(dev).dest[i] = buf[i];
 685                 TXHEAD(dev).clear = conf->txClear;
 686                 TXHEAD(dev).retries = conf->txRetries;  /* 0 is use default */
 687                 TXHEAD(dev).routing = conf->txRouting;
 688                 TXHEAD(dev).scrambled = conf->txScrambled;
 689                 memcpy_toio((char __iomem *)arlan + TXHEAD(dev).offset, buf + ARLAN_FAKE_HDR_LEN, TXHEAD(dev).length);
 690         }
 691         else if (!TXTAIL(dev).offset && length < (0x800 - headEnds))
 692         {
 693                 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
 694                         printk(KERN_ERR "TXTAIL insert, headEnd %d\n", headEnds);
 695
 696                 TXTAIL(dev).offset =
 697                         offsetof(struct arlan_shmem, txBuffer) + 0x800 - (length / 64 + 2) * 64;
 698                 TXTAIL(dev).length = length - ARLAN_FAKE_HDR_LEN;
 699                 for (i = 0; i < 6; i++)
 700                         TXTAIL(dev).dest[i] = buf[i];
 701                 TXTAIL(dev).clear = conf->txClear;
 702                 TXTAIL(dev).retries = conf->txRetries;
 703                 TXTAIL(dev).routing = conf->txRouting;
 704                 TXTAIL(dev).scrambled = conf->txScrambled;
 705                 memcpy_toio(((char __iomem *)arlan + TXTAIL(dev).offset), buf + ARLAN_FAKE_HDR_LEN, TXTAIL(dev).length);
 706         }
 707         else
 708         {
 709                 netif_stop_queue (dev);
 710                 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
 711                         printk(KERN_ERR "TX TAIL & HEAD full, return, tailStart %d headEnd %d\n", tailStarts, headEnds);
 712                 return -1;
 713         }
 714         priv->out_bytes += length;
 715         priv->out_bytes10 += length;
 716         if (conf->measure_rate < 1)
 717                 conf->measure_rate = 1;
 718         if (time_after(jiffies, priv->out_time + conf->measure_rate * HZ))
 719         {
 720                 conf->out_speed = priv->out_bytes / conf->measure_rate;
 721                 priv->out_bytes = 0;
 722                 priv->out_time = jiffies;
 723         }
 724         if (time_after(jiffies, priv->out_time10 + conf->measure_rate * 10*HZ))
 725         {
 726                 conf->out_speed10 = priv->out_bytes10 / (10 * conf->measure_rate);
 727                 priv->out_bytes10 = 0;
 728                 priv->out_time10 = jiffies;
 729         }
 730         if (TXHEAD(dev).offset && TXTAIL(dev).offset)
 731         {
 732                 netif_stop_queue (dev);
 733                 return 0;
 734         }
 735         else
 736                 netif_start_queue (dev);
 737
 738
 739         IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
 740                 printk(KERN_WARNING "%s Transmit t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name,
 741                    (unsigned char) buf[0], (unsigned char) buf[1], (unsigned char) buf[2], (unsigned char) buf[3],
 742                    (unsigned char) buf[4], (unsigned char) buf[5], (unsigned char) buf[6], (unsigned char) buf[7],
 743                    (unsigned char) buf[8], (unsigned char) buf[9], (unsigned char) buf[10], (unsigned char) buf[11]);
 744
 745         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "TX command prepare for buffer %d\n", priv->txLast);
 746
 747         arlan_command(dev, ARLAN_COMMAND_TX);
 748
 749         priv->tx_last_sent = jiffies;
 750
 751         IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("%s TX Qued %d bytes \n", dev->name, length);
 752
 753         ARLAN_DEBUG_EXIT("arlan_hw_tx");
 754
 755         return 0;
 756 }
 757
 758
 759 static int arlan_hw_config(struct net_device *dev)
 760 {
 761         struct arlan_private *priv = netdev_priv(dev);
 762         volatile struct arlan_shmem __iomem *arlan = priv->card;
 763         struct arlan_conf_stru *conf = priv->Conf;
 764
 765         ARLAN_DEBUG_ENTRY("arlan_hw_config");
 766
 767         printk(KERN_NOTICE "%s arlan configure called \n", dev->name);
 768         if (arlan_EEPROM_bad)
 769                 printk(KERN_NOTICE "arlan configure with eeprom bad option \n");
 770
 771
 772         WRITESHM(arlan->spreadingCode, conf->spreadingCode, u_char);
 773         WRITESHM(arlan->channelSet, conf->channelSet, u_char);
 774
 775         if (arlan_EEPROM_bad)
 776                 WRITESHM(arlan->defaultChannelSet, conf->channelSet, u_char);
 777
 778         WRITESHM(arlan->channelNumber, conf->channelNumber, u_char);
 779
 780         WRITESHM(arlan->scramblingDisable, conf->scramblingDisable, u_char);
 781         WRITESHM(arlan->txAttenuation, conf->txAttenuation, u_char);
 782
 783         WRITESHM(arlan->systemId, conf->systemId, u_int);
 784
 785         WRITESHM(arlan->maxRetries, conf->maxRetries, u_char);
 786         WRITESHM(arlan->receiveMode, conf->receiveMode, u_char);
 787         WRITESHM(arlan->priority, conf->priority, u_char);
 788         WRITESHM(arlan->rootOrRepeater, conf->rootOrRepeater, u_char);
 789         WRITESHM(arlan->SID, conf->SID, u_int);
 790
 791         WRITESHM(arlan->registrationMode, conf->registrationMode, u_char);
 792
 793         WRITESHM(arlan->registrationFill, conf->registrationFill, u_char);
 794         WRITESHM(arlan->localTalkAddress, conf->localTalkAddress, u_char);
 795         WRITESHM(arlan->codeFormat, conf->codeFormat, u_char);
 796         WRITESHM(arlan->numChannels, conf->numChannels, u_char);
 797         WRITESHM(arlan->channel1, conf->channel1, u_char);
 798         WRITESHM(arlan->channel2, conf->channel2, u_char);
 799         WRITESHM(arlan->channel3, conf->channel3, u_char);
 800         WRITESHM(arlan->channel4, conf->channel4, u_char);
 801         WRITESHM(arlan->radioNodeId, conf->radioNodeId, u_short);
 802         WRITESHM(arlan->SID, conf->SID, u_int);
 803         WRITESHM(arlan->waitTime, conf->waitTime, u_short);
 804         WRITESHM(arlan->lParameter, conf->lParameter, u_short);
 805         memcpy_toio(&(arlan->_15), &(conf->_15), 3);
 806         WRITESHM(arlan->_15, conf->_15, u_short);
 807         WRITESHM(arlan->headerSize, conf->headerSize, u_short);
 808         if (arlan_EEPROM_bad)
 809                 WRITESHM(arlan->hardwareType, conf->hardwareType, u_char);
 810         WRITESHM(arlan->radioType, conf->radioType, u_char);
 811         if (arlan_EEPROM_bad)
 812                 WRITESHM(arlan->radioModule, conf->radioType, u_char);
 813
 814         memcpy_toio(arlan->encryptionKey + keyStart, encryptionKey, 8);
 815         memcpy_toio(arlan->name, conf->siteName, 16);
 816
 817         WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_CONF);  /* do configure */
 818         memset_io(arlan->commandParameter, 0, 0xf);     /* 0xf */
 819         memset_io(arlan->commandParameter + 1, 0, 2);
 820         if (conf->writeEEPROM)
 821         {
 822                   memset_io(arlan->commandParameter, conf->writeEEPROM, 1);
 823 //              conf->writeEEPROM=0;
 824         }
 825         if (conf->registrationMode && conf->registrationInterrupts)
 826                 memset_io(arlan->commandParameter + 3, 1, 1);
 827         else
 828                 memset_io(arlan->commandParameter + 3, 0, 1);
 829
 830         priv->irq_test_done = 0;
 831
 832         if (conf->tx_queue_len)
 833                 dev->tx_queue_len = conf->tx_queue_len;
 834         udelay(100);
 835
 836         ARLAN_DEBUG_EXIT("arlan_hw_config");
 837         return 0;
 838 }
 839
 840
 841 static int arlan_read_card_configuration(struct net_device *dev)
 842 {
 843         u_char tlx415;
 844         struct arlan_private *priv = netdev_priv(dev);
 845         volatile struct arlan_shmem __iomem *arlan = priv->card;
 846         struct arlan_conf_stru *conf = priv->Conf;
 847
 848         ARLAN_DEBUG_ENTRY("arlan_read_card_configuration");
 849
 850         if (radioNodeId == radioNodeIdUNKNOWN)
 851         {
 852                 READSHM(conf->radioNodeId, arlan->radioNodeId, u_short);
 853         }
 854         else
 855                 conf->radioNodeId = radioNodeId;
 856
 857         if (SID == SIDUNKNOWN)
 858         {
 859                 READSHM(conf->SID, arlan->SID, u_int);
 860         }
 861         else conf->SID = SID;
 862
 863         if (spreadingCode == spreadingCodeUNKNOWN)
 864         {
 865                   READSHM(conf->spreadingCode, arlan->spreadingCode, u_char);
 866         }
 867         else
 868                 conf->spreadingCode = spreadingCode;
 869
 870         if (channelSet == channelSetUNKNOWN)
 871         {
 872                 READSHM(conf->channelSet, arlan->channelSet, u_char);
 873         }
 874         else conf->channelSet = channelSet;
 875
 876         if (channelNumber == channelNumberUNKNOWN)
 877         {
 878                 READSHM(conf->channelNumber, arlan->channelNumber, u_char);
 879         }
 880         else conf->channelNumber = channelNumber;
 881
 882         READSHM(conf->scramblingDisable, arlan->scramblingDisable, u_char);
 883         READSHM(conf->txAttenuation, arlan->txAttenuation, u_char);
 884
 885         if (systemId == systemIdUNKNOWN)
 886         {
 887                 READSHM(conf->systemId, arlan->systemId, u_int);
 888         }
 889         else conf->systemId = systemId;
 890
 891         READSHM(conf->maxDatagramSize, arlan->maxDatagramSize, u_short);
 892         READSHM(conf->maxFrameSize, arlan->maxFrameSize, u_short);
 893         READSHM(conf->maxRetries, arlan->maxRetries, u_char);
 894         READSHM(conf->receiveMode, arlan->receiveMode, u_char);
 895         READSHM(conf->priority, arlan->priority, u_char);
 896         READSHM(conf->rootOrRepeater, arlan->rootOrRepeater, u_char);
 897
 898         if (SID == SIDUNKNOWN)
 899         {
 900                   READSHM(conf->SID, arlan->SID, u_int);
 901         }
 902         else conf->SID = SID;
 903
 904         if (registrationMode == registrationModeUNKNOWN)
 905         {
 906                   READSHM(conf->registrationMode, arlan->registrationMode, u_char);
 907         }
 908         else conf->registrationMode = registrationMode;
 909
 910         READSHM(conf->registrationFill, arlan->registrationFill, u_char);
 911         READSHM(conf->localTalkAddress, arlan->localTalkAddress, u_char);
 912         READSHM(conf->codeFormat, arlan->codeFormat, u_char);
 913         READSHM(conf->numChannels, arlan->numChannels, u_char);
 914         READSHM(conf->channel1, arlan->channel1, u_char);
 915         READSHM(conf->channel2, arlan->channel2, u_char);
 916         READSHM(conf->channel3, arlan->channel3, u_char);
 917         READSHM(conf->channel4, arlan->channel4, u_char);
 918         READSHM(conf->waitTime, arlan->waitTime, u_short);
 919         READSHM(conf->lParameter, arlan->lParameter, u_short);
 920         READSHM(conf->_15, arlan->_15, u_short);
 921         READSHM(conf->headerSize, arlan->headerSize, u_short);
 922         READSHM(conf->hardwareType, arlan->hardwareType, u_char);
 923         READSHM(conf->radioType, arlan->radioModule, u_char);
 924
 925         if (conf->radioType == 0)
 926                 conf->radioType = 0xc;
 927
 928         WRITESHM(arlan->configStatus, 0xA5, u_char);
 929         READSHM(tlx415, arlan->configStatus, u_char);
 930
 931         if (tlx415 != 0xA5)
 932                 printk(KERN_INFO "%s tlx415 chip \n", dev->name);
 933
 934         conf->txClear = 0;
 935         conf->txRetries = 1;
 936         conf->txRouting = 1;
 937         conf->txScrambled = 0;
 938         conf->rxParameter = 1;
 939         conf->txTimeoutMs = 4000;
 940         conf->waitCardTimeout = 100000;
 941         conf->receiveMode = ARLAN_RCV_CLEAN;
 942         memcpy_fromio(conf->siteName, arlan->name, 16);
 943         conf->siteName[16] = '\0';
 944         conf->retries = retries;
 945         conf->tx_delay_ms = tx_delay_ms;
 946         conf->ReTransmitPacketMaxSize = 200;
 947         conf->waitReTransmitPacketMaxSize = 200;
 948         conf->txAckTimeoutMs = 900;
 949         conf->fastReTransCount = 3;
 950
 951         ARLAN_DEBUG_EXIT("arlan_read_card_configuration");
 952
 953         return 0;
 954 }
 955
 956
 957 static int lastFoundAt = 0xbe000;
 958
 959
 960 /*
 961  * This is the real probe routine. Linux has a history of friendly device
 962  * probes on the ISA bus. A good device probes avoids doing writes, and
 963  * verifies that the correct device exists and functions.
 964  */
 965 #define ARLAN_SHMEM_SIZE        0x2000
 966 static int __init arlan_check_fingerprint(unsigned long memaddr)
 967 {
 968         static const char probeText[] = "TELESYSTEM SLW INC.    ARLAN \0";
 969         volatile struct arlan_shmem __iomem *arlan = (struct arlan_shmem *) memaddr;
 970         unsigned long paddr = virt_to_phys((void *) memaddr);
 971         char tempBuf[49];
 972
 973         ARLAN_DEBUG_ENTRY("arlan_check_fingerprint");
 974
 975         if (!request_mem_region(paddr, ARLAN_SHMEM_SIZE, "arlan")) {
 976                 // printk(KERN_WARNING "arlan: memory region %lx excluded from probing \n",paddr);
 977                 return -ENODEV;
 978         }
 979
 980         memcpy_fromio(tempBuf, arlan->textRegion, 29);
 981         tempBuf[30] = 0;
 982
 983         /* check for card at this address */
 984         if (0 != strncmp(tempBuf, probeText, 29)){
 985                 release_mem_region(paddr, ARLAN_SHMEM_SIZE);
 986                 return -ENODEV;
 987         }
 988
 989 //   printk(KERN_INFO "arlan found at 0x%x \n",memaddr);
 990         ARLAN_DEBUG_EXIT("arlan_check_fingerprint");
 991
 992         return 0;
 993 }
 994
 995 static int arlan_change_mtu(struct net_device *dev, int new_mtu)
 996 {
 997         struct arlan_private *priv = netdev_priv(dev);
 998         struct arlan_conf_stru *conf = priv->Conf;
 999
1000         ARLAN_DEBUG_ENTRY("arlan_change_mtu");
1001         if (new_mtu > 2032)
1002                 return -EINVAL;
1003         dev->mtu = new_mtu;
1004         if (new_mtu < 256)
1005                 new_mtu = 256;  /* cards book suggests 1600 */
1006         conf->maxDatagramSize = new_mtu;
1007         conf->maxFrameSize = new_mtu + 48;
1008
1009         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
1010         printk(KERN_NOTICE "%s mtu changed to %d \n", dev->name, new_mtu);
1011
1012         ARLAN_DEBUG_EXIT("arlan_change_mtu");
1013
1014         return 0;
1015 }
1016
1017 static int arlan_mac_addr(struct net_device *dev, void *p)
1018 {
1019         struct sockaddr *addr = p;
1020
1021
1022         ARLAN_DEBUG_ENTRY("arlan_mac_addr");
1023         return -EINVAL;
1024
1025         if (!netif_running(dev))
1026                 return -EBUSY;
1027         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1028
1029         ARLAN_DEBUG_EXIT("arlan_mac_addr");
1030         return 0;
1031 }
1032
1033
1034
1035 static int __init arlan_setup_device(struct net_device *dev, int num)
1036 {
1037         struct arlan_private *ap = netdev_priv(dev);
1038         int err;
1039
1040         ARLAN_DEBUG_ENTRY("arlan_setup_device");
1041
1042         ap->conf = (struct arlan_shmem *)(ap+1);
1043
1044         dev->tx_queue_len = tx_queue_len;
1045         dev->open = arlan_open;
1046         dev->stop = arlan_close;
1047         dev->hard_start_xmit = arlan_tx;
1048         dev->get_stats = arlan_statistics;
1049         dev->set_multicast_list = arlan_set_multicast;
1050         dev->change_mtu = arlan_change_mtu;
1051         dev->set_mac_address = arlan_mac_addr;
1052         dev->tx_timeout = arlan_tx_timeout;
1053         dev->watchdog_timeo = 3*HZ;
1054
1055         ap->irq_test_done = 0;
1056         ap->Conf = &arlan_conf[num];
1057
1058         ap->Conf->pre_Command_Wait = 40;
1059         ap->Conf->rx_tweak1 = 30;
1060         ap->Conf->rx_tweak2 = 0;
1061
1062
1063         err = register_netdev(dev);
1064         if (err) {
1065                 release_mem_region(virt_to_phys((void *) dev->mem_start),
1066                            ARLAN_SHMEM_SIZE);
1067                 free_netdev(dev);
1068                 return err;
1069         }
1070         arlan_device[num] = dev;
1071         ARLAN_DEBUG_EXIT("arlan_setup_device");
1072         return 0;
1073 }
1074
1075 static int __init arlan_probe_here(struct net_device *dev,
1076                                    unsigned long memaddr)
1077 {
1078         struct arlan_private *ap = netdev_priv(dev);
1079
1080         ARLAN_DEBUG_ENTRY("arlan_probe_here");
1081
1082         if (arlan_check_fingerprint(memaddr))
1083                 return -ENODEV;
1084
1085         printk(KERN_NOTICE "%s: Arlan found at %x, \n ", dev->name,
1086                (int) virt_to_phys((void*)memaddr));
1087
1088         ap->card = (void *) memaddr;
1089         dev->mem_start = memaddr;
1090         dev->mem_end = memaddr + ARLAN_SHMEM_SIZE-1;
1091
1092         if (dev->irq < 2)
1093         {
1094                 READSHM(dev->irq, ap->card->irqLevel, u_char);
1095         } else if (dev->irq == 2)
1096                 dev->irq = 9;
1097
1098         arlan_read_card_configuration(dev);
1099
1100         ARLAN_DEBUG_EXIT("arlan_probe_here");
1101         return 0;
1102 }
1103
1104
1105 static int arlan_open(struct net_device *dev)
1106 {
1107         struct arlan_private *priv = netdev_priv(dev);
1108         volatile struct arlan_shmem __iomem *arlan = priv->card;
1109         int ret = 0;
1110
1111         ARLAN_DEBUG_ENTRY("arlan_open");
1112
1113         ret = request_irq(dev->irq, &arlan_interrupt, 0, dev->name, dev);
1114         if (ret)
1115         {
1116                 printk(KERN_ERR "%s: unable to get IRQ %d .\n",
1117                         dev->name, dev->irq);
1118                 return ret;
1119         }
1120
1121
1122         priv->bad = 0;
1123         priv->lastReset = 0;
1124         priv->reset = 0;
1125         memcpy_fromio(dev->dev_addr, arlan->lanCardNodeId, 6);
1126         memset(dev->broadcast, 0xff, 6);
1127         dev->tx_queue_len = tx_queue_len;
1128         priv->interrupt_processing_active = 0;
1129         spin_lock_init(&priv->lock);
1130
1131         netif_start_queue (dev);
1132
1133         priv->registrationLostCount = 0;
1134         priv->registrationLastSeen = jiffies;
1135         priv->txLast = 0;
1136         priv->tx_command_given = 0;
1137         priv->rx_command_given = 0;
1138
1139         priv->reRegisterExp = 1;
1140         priv->tx_last_sent = jiffies - 1;
1141         priv->tx_last_cleared = jiffies;
1142         priv->Conf->writeEEPROM = 0;
1143         priv->Conf->registrationInterrupts = 1;
1144
1145         init_timer(&priv->timer);
1146         priv->timer.expires = jiffies + HZ / 10;
1147         priv->timer.data = (unsigned long) dev;
1148         priv->timer.function = &arlan_registration_timer;       /* timer handler */
1149
1150         arlan_command(dev, ARLAN_COMMAND_POWERUP | ARLAN_COMMAND_LONG_WAIT_NOW);
1151         mdelay(200);
1152         add_timer(&priv->timer);
1153
1154         ARLAN_DEBUG_EXIT("arlan_open");
1155         return 0;
1156 }
1157
1158
1159 static void arlan_tx_timeout (struct net_device *dev)
1160 {
1161         printk(KERN_ERR "%s: arlan transmit timed out, kernel decided\n", dev->name);
1162         /* Try to restart the adaptor. */
1163         arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
1164         // dev->trans_start = jiffies;
1165         // netif_start_queue (dev);
1166 }
1167
1168
1169 static int arlan_tx(struct sk_buff *skb, struct net_device *dev)
1170 {
1171         short length;
1172         unsigned char *buf;
1173
1174         ARLAN_DEBUG_ENTRY("arlan_tx");
1175
1176         length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1177         buf = skb->data;
1178
1179         if (length + 0x12 > 0x800) {
1180                 printk(KERN_ERR "TX RING overflow \n");
1181                 netif_stop_queue (dev);
1182         }
1183
1184         if (arlan_hw_tx(dev, buf, length) == -1)
1185                 goto bad_end;
1186
1187         dev->trans_start = jiffies;
1188
1189         dev_kfree_skb(skb);
1190
1191         arlan_process_interrupt(dev);
1192         ARLAN_DEBUG_EXIT("arlan_tx");
1193         return 0;
1194
1195 bad_end:
1196         arlan_process_interrupt(dev);
1197         netif_stop_queue (dev);
1198         ARLAN_DEBUG_EXIT("arlan_tx");
1199         return 1;
1200 }
1201
1202
1203 static inline int DoNotReTransmitCrap(struct net_device *dev)
1204 {
1205         struct arlan_private *priv = netdev_priv(dev);
1206
1207         if (TXLAST(dev).length < priv->Conf->ReTransmitPacketMaxSize)
1208                 return 1;
1209         return 0;
1210
1211 }
1212
1213 static inline int DoNotWaitReTransmitCrap(struct net_device *dev)
1214 {
1215         struct arlan_private *priv = netdev_priv(dev);
1216
1217         if (TXLAST(dev).length < priv->Conf->waitReTransmitPacketMaxSize)
1218                 return 1;
1219         return 0;
1220 }
1221
1222 static inline void arlan_queue_retransmit(struct net_device *dev)
1223 {
1224         struct arlan_private *priv = netdev_priv(dev);
1225
1226         ARLAN_DEBUG_ENTRY("arlan_queue_retransmit");
1227
1228         if (DoNotWaitReTransmitCrap(dev))
1229         {
1230                   arlan_drop_tx(dev);
1231         } else
1232                 priv->ReTransmitRequested++;
1233
1234         ARLAN_DEBUG_EXIT("arlan_queue_retransmit");
1235 }
1236
1237 static inline void RetryOrFail(struct net_device *dev)
1238 {
1239         struct arlan_private *priv = netdev_priv(dev);
1240
1241         ARLAN_DEBUG_ENTRY("RetryOrFail");
1242
1243         if (priv->retransmissions > priv->Conf->retries ||
1244             DoNotReTransmitCrap(dev))
1245         {
1246                 arlan_drop_tx(dev);
1247         }
1248         else if (priv->bad <= priv->Conf->fastReTransCount)
1249         {
1250                 arlan_retransmit_now(dev);
1251         }
1252         else arlan_queue_retransmit(dev);
1253
1254         ARLAN_DEBUG_EXIT("RetryOrFail");
1255 }
1256
1257
1258 static void arlan_tx_done_interrupt(struct net_device *dev, int status)
1259 {
1260         struct arlan_private *priv = netdev_priv(dev);
1261
1262         ARLAN_DEBUG_ENTRY("arlan_tx_done_interrupt");
1263
1264         priv->tx_last_cleared = jiffies;
1265         priv->tx_command_given = 0;
1266         switch (status)
1267         {
1268                 case 1:
1269                 {
1270                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1271                                 printk("arlan intr: transmit OK\n");
1272                         priv->stats.tx_packets++;
1273                         priv->bad = 0;
1274                         priv->reset = 0;
1275                         priv->retransmissions = 0;
1276                         if (priv->Conf->tx_delay_ms)
1277                         {
1278                                 priv->tx_done_delayed = jiffies + (priv->Conf->tx_delay_ms * HZ) / 1000 + 1;
1279                         }
1280                         else
1281                         {
1282                                 TXLAST(dev).offset = 0;
1283                                 if (priv->txLast)
1284                                         priv->txLast = 0;
1285                                 else if (TXTAIL(dev).offset)
1286                                         priv->txLast = 1;
1287                                 if (TXLAST(dev).offset)
1288                                 {
1289                                         arlan_retransmit_now(dev);
1290                                         dev->trans_start = jiffies;
1291                                 }
1292                                 if (!TXHEAD(dev).offset || !TXTAIL(dev).offset)
1293                                 {
1294                                         netif_wake_queue (dev);
1295                                 }
1296                         }
1297                 }
1298                 break;
1299
1300                 case 2:
1301                 {
1302                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1303                                 printk("arlan intr: transmit timed out\n");
1304                         priv->bad += 1;
1305                         //arlan_queue_retransmit(dev);
1306                         RetryOrFail(dev);
1307                 }
1308                 break;
1309
1310                 case 3:
1311                 {
1312                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1313                                 printk("arlan intr: transmit max retries\n");
1314                         priv->bad += 1;
1315                         priv->reset = 0;
1316                         //arlan_queue_retransmit(dev);
1317                         RetryOrFail(dev);
1318                 }
1319                 break;
1320
1321                 case 4:
1322                 {
1323                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1324                                 printk("arlan intr: transmit aborted\n");
1325                         priv->bad += 1;
1326                         arlan_queue_retransmit(dev);
1327                         //RetryOrFail(dev);
1328                 }
1329                 break;
1330
1331                 case 5:
1332                 {
1333                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1334                                 printk("arlan intr: transmit not registered\n");
1335                         priv->bad += 1;
1336                         //debug=101;
1337                         arlan_queue_retransmit(dev);
1338                 }
1339                 break;
1340
1341                 case 6:
1342                 {
1343                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1344                                 printk("arlan intr: transmit destination full\n");
1345                         priv->bad += 1;
1346                         priv->reset = 0;
1347                         //arlan_drop_tx(dev);
1348                         arlan_queue_retransmit(dev);
1349                 }
1350                 break;
1351
1352                 case 7:
1353                 {
1354                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1355                                 printk("arlan intr: transmit unknown ack\n");
1356                         priv->bad += 1;
1357                         priv->reset = 0;
1358                         arlan_queue_retransmit(dev);
1359                 }
1360                 break;
1361
1362                 case 8:
1363                 {
1364                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1365                                 printk("arlan intr: transmit dest mail box full\n");
1366                         priv->bad += 1;
1367                         priv->reset = 0;
1368                         //arlan_drop_tx(dev);
1369                         arlan_queue_retransmit(dev);
1370                 }
1371                 break;
1372
1373                 case 9:
1374                 {
1375                         IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1376                                 printk("arlan intr: transmit root dest not reg.\n");
1377                         priv->bad += 1;
1378                         priv->reset = 1;
1379                         //arlan_drop_tx(dev);
1380                         arlan_queue_retransmit(dev);
1381                 }
1382                 break;
1383
1384                 default:
1385                 {
1386                         printk(KERN_ERR "arlan intr: transmit status unknown\n");
1387                         priv->bad += 1;
1388                         priv->reset = 1;
1389                         arlan_drop_tx(dev);
1390                 }
1391         }
1392
1393         ARLAN_DEBUG_EXIT("arlan_tx_done_interrupt");
1394 }
1395
1396
1397 static void arlan_rx_interrupt(struct net_device *dev, u_char rxStatus, u_short rxOffset, u_short pkt_len)
1398 {
1399         char *skbtmp;
1400         int i = 0;
1401
1402         struct arlan_private *priv = netdev_priv(dev);
1403         volatile struct arlan_shmem __iomem *arlan = priv->card;
1404         struct arlan_conf_stru *conf = priv->Conf;
1405
1406
1407         ARLAN_DEBUG_ENTRY("arlan_rx_interrupt");
1408         // by spec,   not                WRITESHMB(arlan->rxStatus,0x00);
1409         // prohibited here              arlan_command(dev, ARLAN_COMMAND_RX);
1410
1411         if (pkt_len < 10 || pkt_len > 2048)
1412         {
1413                 printk(KERN_WARNING "%s: got too short or long packet, len %d \n", dev->name, pkt_len);
1414                 return;
1415         }
1416         if (rxOffset + pkt_len > 0x2000)
1417         {
1418                 printk("%s: got too long packet, len %d offset %x\n", dev->name, pkt_len, rxOffset);
1419                 return;
1420         }
1421         priv->in_bytes += pkt_len;
1422         priv->in_bytes10 += pkt_len;
1423         if (conf->measure_rate < 1)
1424                 conf->measure_rate = 1;
1425         if (time_after(jiffies, priv->in_time + conf->measure_rate * HZ))
1426         {
1427                 conf->in_speed = priv->in_bytes / conf->measure_rate;
1428                 priv->in_bytes = 0;
1429                 priv->in_time = jiffies;
1430         }
1431         if (time_after(jiffies, priv->in_time10 + conf->measure_rate * 10*HZ))
1432         {
1433                 conf->in_speed10 = priv->in_bytes10 / (10 * conf->measure_rate);
1434                 priv->in_bytes10 = 0;
1435                 priv->in_time10 = jiffies;
1436         }
1437         DEBUGSHM(1, "arlan rcv pkt rxStatus= %d ", arlan->rxStatus, u_char);
1438         switch (rxStatus)
1439         {
1440                 case 1:
1441                 case 2:
1442                 case 3:
1443                 {
1444                         /* Malloc up new buffer. */
1445                         struct sk_buff *skb;
1446
1447                         DEBUGSHM(50, "arlan recv pkt offs=%d\n", arlan->rxOffset, u_short);
1448                         DEBUGSHM(1, "arlan rxFrmType = %d \n", arlan->rxFrmType, u_char);
1449                         DEBUGSHM(1, KERN_INFO "arlan rx scrambled = %d \n", arlan->scrambled, u_char);
1450
1451                         /* here we do multicast filtering to avoid slow 8-bit memcopy */
1452 #ifdef ARLAN_MULTICAST
1453                         if (!(dev->flags & IFF_ALLMULTI) &&
1454                                 !(dev->flags & IFF_PROMISC) &&
1455                                 dev->mc_list)
1456                         {
1457                                 char hw_dst_addr[6];
1458                                 struct dev_mc_list *dmi = dev->mc_list;
1459                                 int i;
1460
1461                                 memcpy_fromio(hw_dst_addr, arlan->ultimateDestAddress, 6);
1462                                 if (hw_dst_addr[0] == 0x01)
1463                                 {
1464                                         if (mdebug)
1465                                                 if (hw_dst_addr[1] == 0x00)
1466                                                         printk(KERN_ERR "%s mcast 0x0100 \n", dev->name);
1467                                                 else if (hw_dst_addr[1] == 0x40)
1468                                                         printk(KERN_ERR "%s m/bcast 0x0140 \n", dev->name);
1469                                         while (dmi)
1470                                         {                                                       if (dmi->dmi_addrlen == 6)
1471                                                 {
1472                                                         if (arlan_debug & ARLAN_DEBUG_HEADER_DUMP)
1473                                                                 printk(KERN_ERR "%s mcl %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name,
1474                                                                                  dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
1475                                                                                  dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]);
1476                                                         for (i = 0; i < 6; i++)
1477                                                                 if (dmi->dmi_addr[i] != hw_dst_addr[i])
1478                                                                         break;
1479                                                         if (i == 6)
1480                                                                 break;
1481                                                 }
1482                                                 else
1483                                                         printk(KERN_ERR "%s: invalid multicast address length given.\n", dev->name);
1484                                                 dmi = dmi->next;
1485                                         }
1486                                         /* we reach here if multicast filtering is on and packet
1487                                          * is multicast and not for receive */
1488                                         goto end_of_interrupt;
1489                                 }
1490                         }
1491 #endif                          // ARLAN_MULTICAST
1492                         /* multicast filtering ends here */
1493                         pkt_len += ARLAN_FAKE_HDR_LEN;
1494
1495                         skb = dev_alloc_skb(pkt_len + 4);
1496                         if (skb == NULL)
1497                         {
1498                                 printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
1499                                 priv->stats.rx_dropped++;
1500                                 break;
1501                         }
1502                         skb_reserve(skb, 2);
1503                         skb->dev = dev;
1504                         skbtmp = skb_put(skb, pkt_len);
1505
1506                         memcpy_fromio(skbtmp + ARLAN_FAKE_HDR_LEN, ((char __iomem *) arlan) + rxOffset, pkt_len - ARLAN_FAKE_HDR_LEN);
1507                         memcpy_fromio(skbtmp, arlan->ultimateDestAddress, 6);
1508                         memcpy_fromio(skbtmp + 6, arlan->rxSrc, 6);
1509                         WRITESHMB(arlan->rxStatus, 0x00);
1510                         arlan_command(dev, ARLAN_COMMAND_RX);
1511
1512                         IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
1513                         {
1514                                 char immedDestAddress[6];
1515                                 char immedSrcAddress[6];
1516                                 memcpy_fromio(immedDestAddress, arlan->immedDestAddress, 6);
1517                                 memcpy_fromio(immedSrcAddress, arlan->immedSrcAddress, 6);
1518
1519                                 printk(KERN_WARNING "%s t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x imd %2x:%2x:%2x:%2x:%2x:%2x ims %2x:%2x:%2x:%2x:%2x:%2x\n", dev->name,
1520                                         (unsigned char) skbtmp[0], (unsigned char) skbtmp[1], (unsigned char) skbtmp[2], (unsigned char) skbtmp[3],
1521                                         (unsigned char) skbtmp[4], (unsigned char) skbtmp[5], (unsigned char) skbtmp[6], (unsigned char) skbtmp[7],
1522                                         (unsigned char) skbtmp[8], (unsigned char) skbtmp[9], (unsigned char) skbtmp[10], (unsigned char) skbtmp[11],
1523                                         immedDestAddress[0], immedDestAddress[1], immedDestAddress[2],
1524                                         immedDestAddress[3], immedDestAddress[4], immedDestAddress[5],
1525                                         immedSrcAddress[0], immedSrcAddress[1], immedSrcAddress[2],
1526                                         immedSrcAddress[3], immedSrcAddress[4], immedSrcAddress[5]);
1527                         }
1528                         skb->protocol = eth_type_trans(skb, dev);
1529                         IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
1530                                 if (skb->protocol != 0x608 && skb->protocol != 0x8)
1531                                 {
1532                                         for (i = 0; i <= 22; i++)
1533                                                 printk("%02x:", (u_char) skbtmp[i + 12]);
1534                                         printk(KERN_ERR "\n");
1535                                         printk(KERN_WARNING "arlan kernel pkt type trans %x \n", skb->protocol);
1536                                 }
1537                         netif_rx(skb);
1538                         dev->last_rx = jiffies;
1539                         priv->stats.rx_packets++;
1540                         priv->stats.rx_bytes += pkt_len;
1541                 }
1542                 break;
1543
1544                 default:
1545                         printk(KERN_ERR "arlan intr: received unknown status\n");
1546                         priv->stats.rx_crc_errors++;
1547                         break;
1548         }
1549         ARLAN_DEBUG_EXIT("arlan_rx_interrupt");
1550 }
1551
1552 static void arlan_process_interrupt(struct net_device *dev)
1553 {
1554         struct arlan_private *priv = netdev_priv(dev);
1555         volatile struct arlan_shmem __iomem *arlan = priv->card;
1556         u_char rxStatus = READSHMB(arlan->rxStatus);
1557         u_char txStatus = READSHMB(arlan->txStatus);
1558         u_short rxOffset = READSHMS(arlan->rxOffset);
1559         u_short pkt_len = READSHMS(arlan->rxLength);
1560         int interrupt_count = 0;
1561
1562         ARLAN_DEBUG_ENTRY("arlan_process_interrupt");
1563
1564         if (test_and_set_bit(0, (void *) &priv->interrupt_processing_active))
1565         {
1566                 if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
1567                         printk(KERN_ERR "interrupt chain reentering \n");
1568                 goto end_int_process;
1569         }
1570         while ((rxStatus || txStatus || priv->interrupt_ack_requested)
1571                         && (interrupt_count < 5))
1572         {
1573                 if (rxStatus)
1574                         priv->last_rx_int_ack_time = jiffies;
1575
1576                 arlan_command(dev, ARLAN_COMMAND_INT_ACK);
1577                 arlan_command(dev, ARLAN_COMMAND_INT_ENABLE);
1578
1579                 IFDEBUG(ARLAN_DEBUG_INTERRUPT)
1580                         printk(KERN_ERR "%s:  got IRQ rx %x tx %x comm %x rxOff %x rxLen %x \n",
1581                                         dev->name, rxStatus, txStatus, READSHMB(arlan->commandByte),
1582                                         rxOffset, pkt_len);
1583
1584                 if (rxStatus == 0 && txStatus == 0)
1585                 {
1586                         if (priv->irq_test_done)
1587                         {
1588                                 if (!registrationBad(dev))
1589                                         IFDEBUG(ARLAN_DEBUG_INTERRUPT) printk(KERN_ERR "%s unknown interrupt(nop? regLost ?) reason tx %d rx %d ",
1590                                                                                     dev->name, txStatus, rxStatus);
1591                         } else {
1592                                 IFDEBUG(ARLAN_DEBUG_INTERRUPT)
1593                                         printk(KERN_INFO "%s irq $%d test OK \n", dev->name, dev->irq);
1594
1595                         }
1596                         priv->interrupt_ack_requested = 0;
1597                         goto ends;
1598                 }
1599                 if (txStatus != 0)
1600                 {
1601                         WRITESHMB(arlan->txStatus, 0x00);
1602                         arlan_tx_done_interrupt(dev, txStatus);
1603                         goto ends;
1604                 }
1605                 if (rxStatus == 1 || rxStatus == 2)
1606                 {               /* a packet waiting */
1607                         arlan_rx_interrupt(dev, rxStatus, rxOffset, pkt_len);
1608                         goto ends;
1609                 }
1610                 if (rxStatus > 2 && rxStatus < 0xff)
1611                 {
1612                         WRITESHMB(arlan->rxStatus, 0x00);
1613                         printk(KERN_ERR "%s unknown rxStatus reason tx %d rx %d ",
1614                                 dev->name, txStatus, rxStatus);
1615                         goto ends;
1616                 }
1617                 if (rxStatus == 0xff)
1618                 {
1619                         WRITESHMB(arlan->rxStatus, 0x00);
1620                         arlan_command(dev, ARLAN_COMMAND_RX);
1621                         if (registrationBad(dev))
1622                                 netif_device_detach(dev);
1623                         if (!registrationBad(dev))
1624                         {
1625                                 priv->registrationLastSeen = jiffies;
1626                                 if (!netif_queue_stopped(dev) && !priv->under_reset && !priv->under_config)
1627                                         netif_wake_queue (dev);
1628                         }
1629                         goto ends;
1630                 }
1631 ends:
1632
1633                 arlan_command_process(dev);
1634
1635                 rxStatus = READSHMB(arlan->rxStatus);
1636                 txStatus = READSHMB(arlan->txStatus);
1637                 rxOffset = READSHMS(arlan->rxOffset);
1638                 pkt_len = READSHMS(arlan->rxLength);
1639
1640
1641                 priv->irq_test_done = 1;
1642
1643                 interrupt_count++;
1644         }
1645         priv->interrupt_processing_active = 0;
1646
1647 end_int_process:
1648         arlan_command_process(dev);
1649
1650         ARLAN_DEBUG_EXIT("arlan_process_interrupt");
1651         return;
1652 }
1653
1654 static irqreturn_t arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1655 {
1656         struct net_device *dev = dev_id;
1657         struct arlan_private *priv = netdev_priv(dev);
1658         volatile struct arlan_shmem __iomem *arlan = priv->card;
1659         u_char rxStatus = READSHMB(arlan->rxStatus);
1660         u_char txStatus = READSHMB(arlan->txStatus);
1661
1662         ARLAN_DEBUG_ENTRY("arlan_interrupt");
1663
1664
1665         if (!rxStatus && !txStatus)
1666                 priv->interrupt_ack_requested++;
1667
1668         arlan_process_interrupt(dev);
1669
1670         priv->irq_test_done = 1;
1671
1672         ARLAN_DEBUG_EXIT("arlan_interrupt");
1673         return IRQ_HANDLED;
1674
1675 }
1676
1677
1678 static int arlan_close(struct net_device *dev)
1679 {
1680         struct arlan_private *priv = netdev_priv(dev);
1681
1682         ARLAN_DEBUG_ENTRY("arlan_close");
1683
1684         del_timer_sync(&priv->timer);
1685
1686         arlan_command(dev, ARLAN_COMMAND_POWERDOWN);
1687
1688         IFDEBUG(ARLAN_DEBUG_STARTUP)
1689                 printk(KERN_NOTICE "%s: Closing device\n", dev->name);
1690
1691         netif_stop_queue(dev);
1692         free_irq(dev->irq, dev);
1693
1694         ARLAN_DEBUG_EXIT("arlan_close");
1695         return 0;
1696 }
1697
1698 #ifdef ARLAN_DEBUGGING
1699 static long alignLong(volatile u_char * ptr)
1700 {
1701         long ret;
1702         memcpy_fromio(&ret, (void *) ptr, 4);
1703         return ret;
1704 }
1705 #endif
1706
1707 /*
1708  * Get the current statistics.
1709  * This may be called with the card open or closed.
1710  */
1711
1712 static struct net_device_stats *arlan_statistics(struct net_device *dev)
1713 {
1714         struct arlan_private *priv = netdev_priv(dev);
1715         volatile struct arlan_shmem __iomem *arlan = priv->card;
1716
1717
1718         ARLAN_DEBUG_ENTRY("arlan_statistics");
1719
1720         /* Update the statistics from the device registers. */
1721
1722         READSHM(priv->stats.collisions, arlan->numReTransmissions, u_int);
1723         READSHM(priv->stats.rx_crc_errors, arlan->numCRCErrors, u_int);
1724         READSHM(priv->stats.rx_dropped, arlan->numFramesDiscarded, u_int);
1725         READSHM(priv->stats.rx_fifo_errors, arlan->numRXBufferOverflows, u_int);
1726         READSHM(priv->stats.rx_frame_errors, arlan->numReceiveFramesLost, u_int);
1727         READSHM(priv->stats.rx_over_errors, arlan->numRXOverruns, u_int);
1728         READSHM(priv->stats.rx_packets, arlan->numDatagramsReceived, u_int);
1729         READSHM(priv->stats.tx_aborted_errors, arlan->numAbortErrors, u_int);
1730         READSHM(priv->stats.tx_carrier_errors, arlan->numStatusTimeouts, u_int);
1731         READSHM(priv->stats.tx_dropped, arlan->numDatagramsDiscarded, u_int);
1732         READSHM(priv->stats.tx_fifo_errors, arlan->numTXUnderruns, u_int);
1733         READSHM(priv->stats.tx_packets, arlan->numDatagramsTransmitted, u_int);
1734         READSHM(priv->stats.tx_window_errors, arlan->numHoldOffs, u_int);
1735
1736         ARLAN_DEBUG_EXIT("arlan_statistics");
1737
1738         return &priv->stats;
1739 }
1740
1741
1742 static void arlan_set_multicast(struct net_device *dev)
1743 {
1744         struct arlan_private *priv = netdev_priv(dev);
1745         volatile struct arlan_shmem __iomem *arlan = priv->card;
1746         struct arlan_conf_stru *conf = priv->Conf;
1747         int board_conf_needed = 0;
1748
1749
1750         ARLAN_DEBUG_ENTRY("arlan_set_multicast");
1751
1752         if (dev->flags & IFF_PROMISC)
1753         {
1754                 unsigned char recMode;
1755                 READSHM(recMode, arlan->receiveMode, u_char);
1756                 conf->receiveMode = (ARLAN_RCV_PROMISC | ARLAN_RCV_CONTROL);
1757                 if (conf->receiveMode != recMode)
1758                         board_conf_needed = 1;
1759         }
1760         else
1761         {
1762                 /* turn off promiscuous mode  */
1763                 unsigned char recMode;
1764                 READSHM(recMode, arlan->receiveMode, u_char);
1765                 conf->receiveMode = ARLAN_RCV_CLEAN | ARLAN_RCV_CONTROL;
1766                 if (conf->receiveMode != recMode)
1767                         board_conf_needed = 1;
1768         }
1769         if (board_conf_needed)
1770                 arlan_command(dev, ARLAN_COMMAND_CONF);
1771
1772         ARLAN_DEBUG_EXIT("arlan_set_multicast");
1773 }
1774
1775
1776 struct net_device * __init arlan_probe(int unit)
1777 {
1778         struct net_device *dev;
1779         int err;
1780         int m;
1781
1782         ARLAN_DEBUG_ENTRY("arlan_probe");
1783
1784         if (arlans_found == MAX_ARLANS)
1785                 return ERR_PTR(-ENODEV);
1786
1787         /*
1788          * Reserve space for local data and a copy of the shared memory
1789          * that is used by the /proc interface.
1790          */
1791         dev = alloc_etherdev(sizeof(struct arlan_private)
1792                              + sizeof(struct arlan_shmem));
1793         if (!dev)
1794                 return ERR_PTR(-ENOMEM);
1795
1796         SET_MODULE_OWNER(dev);
1797
1798         if (unit >= 0) {
1799                 sprintf(dev->name, "eth%d", unit);
1800                 netdev_boot_setup_check(dev);
1801
1802                 if (dev->mem_start) {
1803                         if (arlan_probe_here(dev, dev->mem_start) == 0)
1804                                 goto found;
1805                         goto not_found;
1806                 }
1807
1808         }
1809
1810
1811         for (m = (int)phys_to_virt(lastFoundAt) + ARLAN_SHMEM_SIZE;
1812              m <= (int)phys_to_virt(0xDE000);
1813              m += ARLAN_SHMEM_SIZE)
1814         {
1815                 if (arlan_probe_here(dev, m) == 0)
1816                 {
1817                         lastFoundAt = (int)virt_to_phys((void*)m);
1818                         goto found;
1819                 }
1820         }
1821
1822         if (lastFoundAt == 0xbe000)
1823                 printk(KERN_ERR "arlan: No Arlan devices found \n");
1824
1825  not_found:
1826         free_netdev(dev);
1827         return ERR_PTR(-ENODEV);
1828
1829  found:
1830         err = arlan_setup_device(dev, arlans_found);
1831         if (err)
1832                 dev = ERR_PTR(err);
1833         else if (!arlans_found++)
1834                 printk(KERN_INFO "Arlan driver %s\n", arlan_version);
1835
1836         return dev;
1837 }
1838
1839 #ifdef  MODULE
1840 int __init init_module(void)
1841 {
1842         int i = 0;
1843
1844         ARLAN_DEBUG_ENTRY("init_module");
1845
1846         if (channelSet != channelSetUNKNOWN || channelNumber != channelNumberUNKNOWN || systemId != systemIdUNKNOWN)
1847                 return -EINVAL;
1848
1849         for (i = 0; i < MAX_ARLANS; i++) {
1850                 struct net_device *dev = arlan_probe(i);
1851
1852                 if (IS_ERR(dev))
1853                         return PTR_ERR(dev);
1854         }
1855         init_arlan_proc();
1856         printk(KERN_INFO "Arlan driver %s\n", arlan_version);
1857         ARLAN_DEBUG_EXIT("init_module");
1858         return 0;
1859 }
1860
1861
1862 void __exit cleanup_module(void)
1863 {
1864         int i = 0;
1865         struct net_device *dev;
1866
1867         ARLAN_DEBUG_ENTRY("cleanup_module");
1868
1869         IFDEBUG(ARLAN_DEBUG_SHUTDOWN)
1870                 printk(KERN_INFO "arlan: unloading module\n");
1871
1872         cleanup_arlan_proc();
1873
1874         for (i = 0; i < MAX_ARLANS; i++)
1875         {
1876                 dev = arlan_device[i];
1877                 if (dev) {
1878                         arlan_command(dev, ARLAN_COMMAND_POWERDOWN );
1879
1880                         unregister_netdev(dev);
1881                         release_mem_region(virt_to_phys((void *) dev->mem_start),
1882                                            ARLAN_SHMEM_SIZE);
1883                         free_netdev(dev);
1884                         arlan_device[i] = NULL;
1885                 }
1886         }
1887
1888         ARLAN_DEBUG_EXIT("cleanup_module");
1889 }
1890
1891
1892 #endif
1893 MODULE_LICENSE("GPL");