drivers/net/tokenring/ibmtr.c

   1 /* ibmtr.c:  A shared-memory IBM Token Ring 16/4 driver for linux
   2  *
   3  *      Written 1993 by Mark Swanson and Peter De Schrijver.
   4  *      This software may be used and distributed according to the terms
   5  *      of the GNU General Public License, incorporated herein by reference.
   6  *
   7  *      This device driver should work with Any IBM Token Ring Card that does
   8  *      not use DMA.
   9  *
  10  *      I used Donald Becker's (becker@scyld.com) device driver work
  11  *      as a base for most of my initial work.
  12  *
  13  *      Changes by Peter De Schrijver
  14  *              (Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
  15  *
  16  *      + changed name to ibmtr.c in anticipation of other tr boards.
  17  *      + changed reset code and adapter open code.
  18  *      + added SAP open code.
  19  *      + a first attempt to write interrupt, transmit and receive routines.
  20  *
  21  *      Changes by David W. Morris (dwm@shell.portal.com) :
  22  *      941003 dwm: - Restructure tok_probe for multiple adapters, devices.
  23  *      + Add comments, misc reorg for clarity.
  24  *      + Flatten interrupt handler levels.
  25  *
  26  *      Changes by Farzad Farid (farzy@zen.via.ecp.fr)
  27  *      and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
  28  *      + multi ring support clean up.
  29  *      + RFC1042 compliance enhanced.
  30  *
  31  *      Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
  32  *      + bug correction in tr_tx
  33  *      + removed redundant information display
  34  *      + some code reworking
  35  *
  36  *      Changes by Michel Lespinasse (walken@via.ecp.fr),
  37  *      Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
  38  *      (February 18, 1996) :
  39  *      + modified shared memory and mmio access port the driver to
  40  *        alpha platform (structure access -> readb/writeb)
  41  *
  42  *      Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
  43  *      (January 18 1996):
  44  *      + swapped WWOR and WWCR in ibmtr.h
  45  *      + moved some init code from tok_probe into trdev_init.  The
  46  *        PCMCIA code can call trdev_init to complete initializing
  47  *        the driver.
  48  *      + added -DPCMCIA to support PCMCIA
  49  *      + detecting PCMCIA Card Removal in interrupt handler.  If
  50  *        ISRP is FF, then a PCMCIA card has been removed
  51  *        10/2000 Burt needed a new method to avoid crashing the OS
  52  *
  53  *      Changes by Paul Norton (pnorton@cts.com) :
  54  *      + restructured the READ.LOG logic to prevent the transmit SRB
  55  *        from being rudely overwritten before the transmit cycle is
  56  *        complete. (August 15 1996)
  57  *      + completed multiple adapter support. (November 20 1996)
  58  *      + implemented csum_partial_copy in tr_rx and increased receive
  59  *        buffer size and count. Minor fixes. (March 15, 1997)
  60  *
  61  *      Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
  62  *      + Now compiles ok as a module again.
  63  *
  64  *      Changes by Paul Norton (pnorton@ieee.org) :
  65  *      + moved the header manipulation code in tr_tx and tr_rx to
  66  *        net/802/tr.c. (July 12 1997)
  67  *      + add retry and timeout on open if cable disconnected. (May 5 1998)
  68  *      + lifted 2000 byte mtu limit. now depends on shared-RAM size.
  69  *        May 25 1998)
  70  *      + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
  71  *
  72  *      Changes by Joel Sloan (jjs@c-me.com) :
  73  *      + disable verbose debug messages by default - to enable verbose
  74  *        debugging, edit the IBMTR_DEBUG_MESSAGES define below
  75  *
  76  *      Changes by Mike Phillips <phillim@amtrak.com> :
  77  *      + Added extra #ifdef's to work with new PCMCIA Token Ring Code.
  78  *        The PCMCIA code now just sets up the card so it can be recognized
  79  *        by ibmtr_probe. Also checks allocated memory vs. on-board memory
  80  *        for correct figure to use.
  81  *
  82  *      Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
  83  *      + added spinlocks for SMP sanity (10 March 1999)
  84  *
  85  *      Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
  86  *      i.e. using functional address C0 00 00 04 00 00 to transmit and
  87  *      receive multicast packets.
  88  *
  89  *      Changes by Mike Sullivan (based on original sram patch by Dave Grothe
  90  *      to support windowing into on adapter shared ram.
  91  *      i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
  92  *      will shift this 16K window over the entire available shared RAM.
  93  *
  94  *      Changes by Peter De Schrijver (p2@mind.be) :
  95  *      + fixed a problem with PCMCIA card removal
  96  *
  97  *      Change by Mike Sullivan et al.:
  98  *      + added turbo card support. No need to use lanaid to configure
  99  *      the adapter into isa compatiblity mode.
 100  *
 101  *      Changes by Burt Silverman to allow the computer to behave nicely when
 102  *      a cable is pulled or not in place, or a PCMCIA card is removed hot.
 103  */
 104
 105 /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value
 106 in the event that chatty debug messages are desired - jjs 12/30/98 */
 107
 108 #define IBMTR_DEBUG_MESSAGES 0
 109
 110 #include <linux/module.h>
 111
 112 #ifdef PCMCIA           /* required for ibmtr_cs.c to build */
 113 #undef MODULE           /* yes, really */
 114 #undef ENABLE_PAGING
 115 #else
 116 #define ENABLE_PAGING 1
 117 #endif
 118
 119 #define FALSE 0
 120 #define TRUE (!FALSE)
 121
 122 /* changes the output format of driver initialization */
 123 #define TR_VERBOSE      0
 124
 125 /* some 95 OS send many non UI frame; this allow removing the warning */
 126 #define TR_FILTERNONUI  1
 127
 128 #include <linux/ioport.h>
 129 #include <linux/netdevice.h>
 130 #include <linux/trdevice.h>
 131 #include <linux/ibmtr.h>
 132
 133 #include <net/checksum.h>
 134
 135 #include <asm/io.h>
 136
 137 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
 138 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
 139
 140 /* version and credits */
 141 #ifndef PCMCIA
 142 static char version[] __initdata =
 143     "\nibmtr.c: v1.3.57   8/ 7/94 Peter De Schrijver and Mark Swanson\n"
 144     "         v2.1.125 10/20/98 Paul Norton    <pnorton@ieee.org>\n"
 145     "         v2.2.0   12/30/98 Joel Sloan     <jjs@c-me.com>\n"
 146     "         v2.2.1   02/08/00 Mike Sullivan  <sullivam@us.ibm.com>\n"
 147     "         v2.2.2   07/27/00 Burt Silverman <burts@us.ibm.com>\n"
 148     "         v2.4.0   03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
 149 #endif
 150
 151 /* this allows displaying full adapter information */
 152
 153 char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
 154
 155 static char pcchannelid[] __devinitdata = {
 156         0x05, 0x00, 0x04, 0x09,
 157         0x04, 0x03, 0x04, 0x0f,
 158         0x03, 0x06, 0x03, 0x01,
 159         0x03, 0x01, 0x03, 0x00,
 160         0x03, 0x09, 0x03, 0x09,
 161         0x03, 0x00, 0x02, 0x00
 162 };
 163
 164 static char mcchannelid[] __devinitdata =  {
 165         0x04, 0x0d, 0x04, 0x01,
 166         0x05, 0x02, 0x05, 0x03,
 167         0x03, 0x06, 0x03, 0x03,
 168         0x05, 0x08, 0x03, 0x04,
 169         0x03, 0x05, 0x03, 0x01,
 170         0x03, 0x08, 0x02, 0x00
 171 };
 172
 173 char __devinit *adapter_def(char type)
 174 {
 175         switch (type) {
 176         case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
 177         case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
 178         case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
 179         case 0xC: return "Auto 16/4 Adapter";
 180         default: return "adapter (unknown type)";
 181         };
 182 };
 183
 184 #define TRC_INIT 0x01           /*  Trace initialization & PROBEs */
 185 #define TRC_INITV 0x02          /*  verbose init trace points     */
 186 unsigned char ibmtr_debug_trace = 0;
 187
 188 static int      ibmtr_probe(struct net_device *dev);
 189 static int      ibmtr_probe1(struct net_device *dev, int ioaddr);
 190 static unsigned char get_sram_size(struct tok_info *adapt_info);
 191 static int      trdev_init(struct net_device *dev);
 192 static int      tok_open(struct net_device *dev);
 193 static int      tok_init_card(struct net_device *dev);
 194 void            tok_open_adapter(unsigned long dev_addr);
 195 static void     open_sap(unsigned char type, struct net_device *dev);
 196 static void     tok_set_multicast_list(struct net_device *dev);
 197 static int      tok_send_packet(struct sk_buff *skb, struct net_device *dev);
 198 static int      tok_close(struct net_device *dev);
 199 irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 200 static void     initial_tok_int(struct net_device *dev);
 201 static void     tr_tx(struct net_device *dev);
 202 static void     tr_rx(struct net_device *dev);
 203 void            ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
 204 static void     tok_rerun(unsigned long dev_addr);
 205 void            ibmtr_readlog(struct net_device *dev);
 206 static struct   net_device_stats *tok_get_stats(struct net_device *dev);
 207 int             ibmtr_change_mtu(struct net_device *dev, int mtu);
 208 static void     find_turbo_adapters(int *iolist);
 209
 210 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
 211         0xa20, 0xa24, 0, 0, 0
 212 };
 213 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
 214 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
 215 static int __devinitdata turbo_searched = 0;
 216
 217 #ifndef PCMCIA
 218 static __u32 ibmtr_mem_base __initdata = 0xd0000;
 219 #endif
 220
 221 static void __devinit PrtChanID(char *pcid, short stride)
 222 {
 223         short i, j;
 224         for (i = 0, j = 0; i < 24; i++, j += stride)
 225                 printk("%1x", ((int) pcid[j]) & 0x0f);
 226         printk("\n");
 227 }
 228
 229 static void __devinit HWPrtChanID(void * pcid, short stride)
 230 {
 231         short i, j;
 232         for (i = 0, j = 0; i < 24; i++, j += stride)
 233                 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
 234         printk("\n");
 235 }
 236
 237 /* We have to ioremap every checked address, because isa_readb is
 238  * going away.
 239  */
 240
 241 static void __devinit find_turbo_adapters(int *iolist) {
 242         int ram_addr;
 243         int index=0;
 244         void *chanid;
 245         int found_turbo=0;
 246         unsigned char *tchanid, ctemp;
 247         int i, j;
 248         unsigned long jif;
 249         void *ram_mapped ;
 250
 251         if (turbo_searched == 1) return;
 252         turbo_searched=1;
 253         for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
 254
 255                 __u32 intf_tbl=0;
 256
 257                 found_turbo=1;
 258                 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
 259                 if (ram_mapped==NULL)
 260                         continue ;
 261                 chanid=(CHANNEL_ID + ram_mapped);
 262                 tchanid=pcchannelid;
 263                 ctemp=readb(chanid) & 0x0f;
 264                 if (ctemp != *tchanid) continue;
 265                 for (i=2,j=1; i<=46; i=i+2,j++) {
 266                         if ((readb(chanid+i) & 0x0f) != tchanid[j]){
 267                                 found_turbo=0;
 268                                 break;
 269                         }
 270                 }
 271                 if (!found_turbo) continue;
 272
 273                 writeb(0x90, ram_mapped+0x1E01);
 274                 for(i=2; i<0x0f; i++) {
 275                         writeb(0x00, ram_mapped+0x1E01+i);
 276                 }
 277                 writeb(0x00, ram_mapped+0x1E01);
 278                 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
 279                 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
 280                 if (intf_tbl) {
 281 #if IBMTR_DEBUG_MESSAGES
 282                         printk("ibmtr::find_turbo_adapters, Turbo found at "
 283                                 "ram_addr %x\n",ram_addr);
 284                         printk("ibmtr::find_turbo_adapters, interface_table ");
 285                         for(i=0; i<6; i++) {
 286                                 printk("%x:",readb(ram_addr+intf_tbl+i));
 287                         }
 288                         printk("\n");
 289 #endif
 290                         turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
 291                         turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
 292                         outb(0, turbo_io[index] + ADAPTRESET);
 293                         for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
 294                         outb(0, turbo_io[index] + ADAPTRESETREL);
 295                         index++;
 296                         continue;
 297                 }
 298 #if IBMTR_DEBUG_MESSAGES
 299                 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
 300                         " %x but not a Turbo model\n",ram_addr);
 301 #endif
 302         iounmap(ram_mapped) ;
 303         } /* for */
 304         for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
 305                 if(!turbo_io[i]) break;
 306                 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
 307                         if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
 308                         iolist[j]=turbo_io[i];
 309                         break;
 310                 }
 311         }
 312 }
 313
 314 static void ibmtr_cleanup_card(struct net_device *dev)
 315 {
 316         if (dev->base_addr) {
 317                 outb(0,dev->base_addr+ADAPTRESET);
 318
 319                 schedule_timeout(TR_RST_TIME); /* wait 50ms */
 320
 321                 outb(0,dev->base_addr+ADAPTRESETREL);
 322         }
 323
 324 #ifndef PCMCIA
 325         free_irq(dev->irq, dev);
 326         release_region(dev->base_addr, IBMTR_IO_EXTENT);
 327
 328         {
 329                 struct tok_info *ti = (struct tok_info *) dev->priv;
 330                 iounmap((u32 *)ti->mmio);
 331                 iounmap((u32 *)ti->sram_virt);
 332         }
 333 #endif
 334 }
 335
 336 int ibmtr_probe_card(struct net_device *dev)
 337 {
 338         int err = ibmtr_probe(dev);
 339         if (!err) {
 340                 err = register_netdev(dev);
 341                 if (err)
 342                         ibmtr_cleanup_card(dev);
 343         }
 344         return err;
 345 }
 346
 347 /****************************************************************************
 348  *      ibmtr_probe():  Routine specified in the network device structure
 349  *      to probe for an IBM Token Ring Adapter.  Routine outline:
 350  *      I.    Interrogate hardware to determine if an adapter exists
 351  *            and what the speeds and feeds are
 352  *      II.   Setup data structures to control execution based upon
 353  *            adapter characteristics.
 354  *
 355  *      We expect ibmtr_probe to be called once for each device entry
 356  *      which references it.
 357  ****************************************************************************/
 358
 359 static int ibmtr_probe(struct net_device *dev)
 360 {
 361         int i;
 362         int base_addr = dev->base_addr;
 363
 364         if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
 365                 return -ENXIO;
 366         if (base_addr > 0x1ff) { /* Check a single specified location.  */
 367                 if (!ibmtr_probe1(dev, base_addr)) return 0;
 368                 return -ENODEV;
 369         }
 370         find_turbo_adapters(ibmtr_portlist);
 371         for (i = 0; ibmtr_portlist[i]; i++) {
 372                 int ioaddr = ibmtr_portlist[i];
 373
 374                 if (!ibmtr_probe1(dev, ioaddr)) return 0;
 375         }
 376         return -ENODEV;
 377 }
 378
 379 /*****************************************************************************/
 380
 381 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
 382 {
 383
 384         unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
 385         void * t_mmio = 0;
 386         struct tok_info *ti = dev->priv;
 387         void *cd_chanid;
 388         unsigned char *tchanid, ctemp;
 389 #ifndef PCMCIA
 390         unsigned char t_irq=0;
 391         unsigned long timeout;
 392         static int version_printed;
 393 #endif
 394
 395         /*    Query the adapter PIO base port which will return
 396          *    indication of where MMIO was placed. We also have a
 397          *    coded interrupt number.
 398          */
 399         segment = inb(PIOaddr);
 400         if (segment < 0x40 || segment > 0xe0) {
 401                 /* Out of range values so we'll assume non-existent IO device
 402                  * but this is not necessarily a problem, esp if a turbo
 403                  * adapter is being used.  */
 404 #if IBMTR_DEBUG_MESSAGES
 405                 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
 406                         "Hardware Problem?\n",PIOaddr,segment);
 407 #endif
 408                 return -ENODEV;
 409         }
 410         /*
 411          *    Compute the linear base address of the MMIO area
 412          *    as LINUX doesn't care about segments
 413          */
 414         t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
 415         if (!t_mmio) {
 416                 DPRINTK("Cannot remap mmiobase memory area") ;
 417                 return -ENODEV ;
 418         }
 419         intr = segment & 0x03;  /* low bits is coded interrupt # */
 420         if (ibmtr_debug_trace & TRC_INIT)
 421                 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
 422                                 , PIOaddr, (int) segment, t_mmio, (int) intr);
 423
 424         /*
 425          *    Now we will compare expected 'channelid' strings with
 426          *    what we is there to learn of ISA/MCA or not TR card
 427          */
 428 #ifdef PCMCIA
 429         iounmap(t_mmio);
 430         t_mmio = (void *)ti->mmio;      /*BMS to get virtual address */
 431         irq = ti->irq;          /*BMS to display the irq!   */
 432 #endif
 433         cd_chanid = (CHANNEL_ID + t_mmio);      /* for efficiency */
 434         tchanid = pcchannelid;
 435         cardpresent = TR_ISA;   /* try ISA */
 436
 437         /*    Suboptimize knowing first byte different */
 438         ctemp = readb(cd_chanid) & 0x0f;
 439         if (ctemp != *tchanid) {        /* NOT ISA card, try MCA */
 440                 tchanid = mcchannelid;
 441                 cardpresent = TR_MCA;
 442                 if (ctemp != *tchanid)  /* Neither ISA nor MCA */
 443                         cardpresent = NOTOK;
 444         }
 445         if (cardpresent != NOTOK) {
 446                 /*       Know presumed type, try rest of ID */
 447                 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
 448                         if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
 449                         /* match failed, not TR card */
 450                         cardpresent = NOTOK;
 451                         break;
 452                 }
 453         }
 454         /*
 455          *    If we have an ISA board check for the ISA P&P version,
 456          *    as it has different IRQ settings
 457          */
 458         if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
 459                 cardpresent = TR_ISAPNP;
 460         if (cardpresent == NOTOK) {     /* "channel_id" did not match, report */
 461                 if (!(ibmtr_debug_trace & TRC_INIT)) {
 462 #ifndef PCMCIA
 463                         iounmap(t_mmio);
 464 #endif
 465                         return -ENODEV;
 466                 }
 467                 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
 468                                                                 PIOaddr);
 469                 DPRINTK("Expected for ISA: ");
 470                 PrtChanID(pcchannelid, 1);
 471                 DPRINTK("           found: ");
 472 /* BMS Note that this can be misleading, when hardware is flaky, because you
 473    are reading it a second time here. So with my flaky hardware, I'll see my-
 474    self in this block, with the HW ID matching the ISA ID exactly! */
 475                 HWPrtChanID(cd_chanid, 2);
 476                 DPRINTK("Expected for MCA: ");
 477                 PrtChanID(mcchannelid, 1);
 478         }
 479         /* Now, setup some of the pl0 buffers for this driver.. */
 480         /* If called from PCMCIA, it is already set up, so no need to
 481            waste the memory, just use the existing structure */
 482 #ifndef PCMCIA
 483         ti->mmio = t_mmio;
 484         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
 485                 if (turbo_io[i] != PIOaddr)
 486                         continue;
 487 #if IBMTR_DEBUG_MESSAGES
 488                 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
 489                        PIOaddr);
 490 #endif
 491                 ti->turbo = 1;
 492                 t_irq = turbo_irq[i];
 493         }
 494 #endif /* !PCMCIA */
 495         ti->readlog_pending = 0;
 496         init_waitqueue_head(&ti->wait_for_reset);
 497
 498         /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
 499          * depending which card is inserted.    */
 500
 501 #ifndef PCMCIA
 502         switch (cardpresent) {
 503         case TR_ISA:
 504                 if (intr == 0) irq = 9; /* irq2 really is irq9 */
 505                 if (intr == 1) irq = 3;
 506                 if (intr == 2) irq = 6;
 507                 if (intr == 3) irq = 7;
 508                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
 509                 break;
 510         case TR_MCA:
 511                 if (intr == 0) irq = 9;
 512                 if (intr == 1) irq = 3;
 513                 if (intr == 2) irq = 10;
 514                 if (intr == 3) irq = 11;
 515                 ti->global_int_enable = 0;
 516                 ti->adapter_int_enable = 0;
 517                 ti->sram_virt=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
 518                 break;
 519         case TR_ISAPNP:
 520                 if (!t_irq) {
 521                         if (intr == 0) irq = 9;
 522                         if (intr == 1) irq = 3;
 523                         if (intr == 2) irq = 10;
 524                         if (intr == 3) irq = 11;
 525                 } else
 526                         irq=t_irq;
 527                 timeout = jiffies + TR_SPIN_INTERVAL;
 528                 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
 529                         if (!time_after(jiffies, timeout)) continue;
 530                         DPRINTK( "Hardware timeout during initialization.\n");
 531                         iounmap(t_mmio);
 532                         kfree(ti);
 533                         return -ENODEV;
 534                 }
 535                 ti->sram_virt =
 536                      ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
 537                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
 538                 break;
 539         } /*end switch (cardpresent) */
 540 #endif  /*not PCMCIA */
 541
 542         if (ibmtr_debug_trace & TRC_INIT) {     /* just report int */
 543                 DPRINTK("irq=%d", irq);
 544                 printk(", sram_virt=0x%x", ti->sram_virt);
 545                 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
 546                         DPRINTK(", ti->mmio=%p", ti->mmio);
 547                         printk(", segment=%02X", segment);
 548                 }
 549                 printk(".\n");
 550         }
 551
 552         /* Get hw address of token ring card */
 553         j = 0;
 554         for (i = 0; i < 0x18; i = i + 2) {
 555                 /* technical reference states to do this */
 556                 temp = readb(ti->mmio + AIP + i) & 0x0f;
 557                 ti->hw_address[j] = temp;
 558                 if (j & 1)
 559                         dev->dev_addr[(j / 2)] =
 560                                 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
 561                 ++j;
 562         }
 563         /* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
 564         ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
 565
 566         /* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
 567         ti->data_rate = readb(ti->mmio + AIPDATARATE);
 568
 569         /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
 570         ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
 571
 572         /* How much shared RAM is on adapter ? */
 573         if (ti->turbo) {
 574                 ti->avail_shared_ram=127;
 575         } else {
 576                 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
 577         }
 578         /* We need to set or do a bunch of work here based on previous results*/
 579         /* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
 580         ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
 581
 582         /* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
 583         switch (readb(ti->mmio + AIP4MBDHB)) {
 584         case 0xe: ti->dhb_size4mb = 4096; break;
 585         case 0xd: ti->dhb_size4mb = 4464; break;
 586         default:  ti->dhb_size4mb = 2048; break;
 587         }
 588
 589         /* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
 590         switch (readb(ti->mmio + AIP16MBDHB)) {
 591         case 0xe: ti->dhb_size16mb = 4096; break;
 592         case 0xd: ti->dhb_size16mb = 8192; break;
 593         case 0xc: ti->dhb_size16mb = 16384; break;
 594         case 0xb: ti->dhb_size16mb = 17960; break;
 595         default:  ti->dhb_size16mb = 2048; break;
 596         }
 597
 598         /*    We must figure out how much shared memory space this adapter
 599          *    will occupy so that if there are two adapters we can fit both
 600          *    in.  Given a choice, we will limit this adapter to 32K.  The
 601          *    maximum space will will use for two adapters is 64K so if the
 602          *    adapter we are working on demands 64K (it also doesn't support
 603          *    paging), then only one adapter can be supported.
 604          */
 605
 606         /*
 607          *    determine how much of total RAM is mapped into PC space
 608          */
 609         ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
 610             1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
 611         ti->page_mask = 0;
 612         if (ti->turbo)  ti->page_mask=0xf0;
 613         else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
 614         else {
 615 #ifdef ENABLE_PAGING
 616                 unsigned char pg_size = 0;
 617                 /* BMS:   page size: PCMCIA, use configuration register;
 618                    ISAPNP, use LANAIDC config tool from www.ibm.com  */
 619                 switch (ti->shared_ram_paging) {
 620                 case 0xf:
 621                         break;
 622                 case 0xe:
 623                         ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
 624                         pg_size = 32;   /* 16KB page size */
 625                         break;
 626                 case 0xd:
 627                         ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
 628                         pg_size = 64;   /* 32KB page size */
 629                         break;
 630                 case 0xc:
 631                         switch (ti->mapped_ram_size) {
 632                         case 32:
 633                                 ti->page_mask = 0xc0;
 634                                 pg_size = 32;
 635                                 break;
 636                         case 64:
 637                                 ti->page_mask = 0x80;
 638                                 pg_size = 64;
 639                                 break;
 640                         }
 641                         break;
 642                 default:
 643                         DPRINTK("Unknown shared ram paging info %01X\n",
 644                                                         ti->shared_ram_paging);
 645                         iounmap(t_mmio);
 646                         kfree(ti);
 647                         return -ENODEV;
 648                         break;
 649                 } /*end switch shared_ram_paging */
 650
 651                 if (ibmtr_debug_trace & TRC_INIT)
 652                         DPRINTK("Shared RAM paging code: %02X, "
 653                                 "mapped RAM size: %dK, shared RAM size: %dK, "
 654                                 "page mask: %02X\n:",
 655                                 ti->shared_ram_paging, ti->mapped_ram_size / 2,
 656                                 ti->avail_shared_ram / 2, ti->page_mask);
 657 #endif  /*ENABLE_PAGING */
 658         }
 659
 660 #ifndef PCMCIA
 661         /* finish figuring the shared RAM address */
 662         if (cardpresent == TR_ISA) {
 663                 static __u32 ram_bndry_mask[] =
 664                         { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
 665                 __u32 new_base, rrr_32, chk_base, rbm;
 666
 667                 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
 668                 rbm = ram_bndry_mask[rrr_32];
 669                 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
 670                 chk_base = new_base + (ti->mapped_ram_size << 9);
 671                 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
 672                         DPRINTK("Shared RAM for this adapter (%05x) exceeds "
 673                         "driver limit (%05x), adapter not started.\n",
 674                         chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
 675                         iounmap(t_mmio);
 676                         kfree(ti);
 677                         return -ENODEV;
 678                 } else { /* seems cool, record what we have figured out */
 679                         ti->sram_base = new_base >> 12;
 680                         ibmtr_mem_base = chk_base;
 681                 }
 682         }
 683         else  ti->sram_base = ti->sram_virt >> 12;
 684
 685         /* The PCMCIA has already got the interrupt line and the io port,
 686            so no chance of anybody else getting it - MLP */
 687         if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
 688                 DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
 689                                         irq);
 690                 iounmap(t_mmio);
 691                 kfree(ti);
 692                 return -ENODEV;
 693         }
 694         /*?? Now, allocate some of the PIO PORTs for this driver.. */
 695         /* record PIOaddr range as busy */
 696         if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
 697                 DPRINTK("Could not grab PIO range. Halting driver.\n");
 698                 free_irq(dev->irq, dev);
 699                 iounmap(t_mmio);
 700                 kfree(ti);
 701                 return -EBUSY;
 702         }
 703
 704         if (!version_printed++) {
 705                 printk(version);
 706         }
 707 #endif /* !PCMCIA */
 708         DPRINTK("%s %s found\n",
 709                 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
 710         DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
 711                         irq, PIOaddr, ti->mapped_ram_size / 2);
 712         DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
 713                 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 714                 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 715         if (ti->page_mask)
 716                 DPRINTK("Shared RAM paging enabled. "
 717                         "Page size: %uK Shared Ram size %dK\n",
 718                         ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
 719         else
 720                 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
 721                                                                 ti->page_mask);
 722
 723         /* Calculate the maximum DHB we can use */
 724         /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
 725             1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
 726             2. user has configured adapter for less than avail_shared_ram
 727                but is not using paging (she should use paging, I believe)
 728         */
 729         if (!ti->page_mask) {
 730                 ti->avail_shared_ram=
 731                                 min(ti->mapped_ram_size,ti->avail_shared_ram);
 732         }
 733
 734         switch (ti->avail_shared_ram) {
 735         case 16:                /* 8KB shared RAM */
 736                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
 737                 ti->rbuf_len4 = 1032;
 738                 ti->rbuf_cnt4=2;
 739                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
 740                 ti->rbuf_len16 = 1032;
 741                 ti->rbuf_cnt16=2;
 742                 break;
 743         case 32:                /* 16KB shared RAM */
 744                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 745                 ti->rbuf_len4 = 1032;
 746                 ti->rbuf_cnt4=4;
 747                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
 748                 ti->rbuf_len16 = 1032;  /*1024 usable */
 749                 ti->rbuf_cnt16=4;
 750                 break;
 751         case 64:                /* 32KB shared RAM */
 752                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 753                 ti->rbuf_len4 = 1032;
 754                 ti->rbuf_cnt4=6;
 755                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
 756                 ti->rbuf_len16 = 1032;
 757                 ti->rbuf_cnt16=6;
 758                 break;
 759         case 127:               /* 63.5KB shared RAM */
 760                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 761                 ti->rbuf_len4 = 1032;
 762                 ti->rbuf_cnt4=6;
 763                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
 764                 ti->rbuf_len16 = 1032;
 765                 ti->rbuf_cnt16=16;
 766                 break;
 767         case 128:               /* 64KB   shared RAM */
 768                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 769                 ti->rbuf_len4 = 1032;
 770                 ti->rbuf_cnt4=6;
 771                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
 772                 ti->rbuf_len16 = 1032;
 773                 ti->rbuf_cnt16=16;
 774                 break;
 775         default:
 776                 ti->dhb_size4mb = 2048;
 777                 ti->rbuf_len4 = 1032;
 778                 ti->rbuf_cnt4=2;
 779                 ti->dhb_size16mb = 2048;
 780                 ti->rbuf_len16 = 1032;
 781                 ti->rbuf_cnt16=2;
 782                 break;
 783         }
 784         /* this formula is not smart enough for the paging case
 785         ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
 786                         ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
 787                         DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
 788                         SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
 789         */
 790         ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
 791         ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
 792         /*BMS assuming 18 bytes of Routing Information (usually works) */
 793         DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
 794                                                      ti->maxmtu16, ti->maxmtu4);
 795
 796         dev->base_addr = PIOaddr;       /* set the value for device */
 797         dev->mem_start = ti->sram_base << 12;
 798         dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
 799         trdev_init(dev);
 800         return 0;   /* Return 0 to indicate we have found a Token Ring card. */
 801 }                               /*ibmtr_probe1() */
 802
 803 /*****************************************************************************/
 804
 805 /* query the adapter for the size of shared RAM  */
 806 /* the function returns the RAM size in units of 512 bytes */
 807
 808 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
 809 {
 810         unsigned char avail_sram_code;
 811         static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
 812         /* Adapter gives
 813            'F' -- use RRR bits 3,2
 814            'E' -- 8kb   'D' -- 16kb
 815            'C' -- 32kb  'A' -- 64KB
 816            'B' - 64KB less 512 bytes at top
 817            (WARNING ... must zero top bytes in INIT */
 818
 819         avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
 820         if (avail_sram_code) return size_code[avail_sram_code];
 821         else            /* for code 'F', must compute size from RRR(3,2) bits */
 822                 return 1 <<
 823                  ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
 824 }
 825
 826 /*****************************************************************************/
 827
 828 static int __devinit trdev_init(struct net_device *dev)
 829 {
 830         struct tok_info *ti = (struct tok_info *) dev->priv;
 831
 832         SET_PAGE(ti->srb_page);
 833         ti->open_failure = NO    ;
 834         dev->open = tok_open;
 835         dev->stop = tok_close;
 836         dev->hard_start_xmit = tok_send_packet;
 837         dev->get_stats = tok_get_stats;
 838         dev->set_multicast_list = tok_set_multicast_list;
 839         dev->change_mtu = ibmtr_change_mtu;
 840
 841         return 0;
 842 }
 843
 844 /*****************************************************************************/
 845
 846 static int tok_init_card(struct net_device *dev)
 847 {
 848         struct tok_info *ti;
 849         short PIOaddr;
 850         unsigned long i;
 851
 852         PIOaddr = dev->base_addr;
 853         ti = (struct tok_info *) dev->priv;
 854         /* Special processing for first interrupt after reset */
 855         ti->do_tok_int = FIRST_INT;
 856         /* Reset adapter */
 857         writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
 858         outb(0, PIOaddr + ADAPTRESET);
 859
 860         current->state=TASK_UNINTERRUPTIBLE;
 861         schedule_timeout(TR_RST_TIME); /* wait 50ms */
 862
 863         outb(0, PIOaddr + ADAPTRESETREL);
 864 #ifdef ENABLE_PAGING
 865         if (ti->page_mask)
 866                 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
 867 #endif
 868         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 869         i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
 870         return i? 0 : -EAGAIN;
 871 }
 872
 873 /*****************************************************************************/
 874 static int tok_open(struct net_device *dev)
 875 {
 876         struct tok_info *ti = (struct tok_info *) dev->priv;
 877         int i;
 878
 879         /*the case we were left in a failure state during a previous open */
 880         if (ti->open_failure == YES) {
 881                 DPRINTK("Last time you were disconnected, how about now?\n");
 882                 printk("You can't insert with an ICS connector half-cocked.\n");
 883         }
 884
 885         ti->open_status  = CLOSED; /* CLOSED or OPEN      */
 886         ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
 887         ti->open_failure =     NO; /* NO     or YES       */
 888         ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
 889         /* 12/2000 not typical Linux, but we can use RUNNING to let us know when
 890         the network has crapped out or cables are disconnected. Useful because
 891         the IFF_UP flag stays up the whole time, until ifconfig tr0 down.
 892         */
 893         dev->flags &= ~IFF_RUNNING;
 894
 895         ti->sram_virt &= ~1; /* to reverse what we do in tok_close */
 896         /* init the spinlock */
 897         ti->lock = (spinlock_t) SPIN_LOCK_UNLOCKED;
 898         init_timer(&ti->tr_timer);
 899
 900         i = tok_init_card(dev);
 901         if (i) return i;
 902
 903         while (1){
 904                 tok_open_adapter((unsigned long) dev);
 905                 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
 906                 /* sig catch: estimate opening adapter takes more than .5 sec*/
 907                 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
 908                 if (i==0) break;
 909                 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
 910                         netif_start_queue(dev);
 911                         DPRINTK("Adapter is up and running\n");
 912                         return 0;
 913                 }
 914                 current->state=TASK_INTERRUPTIBLE;
 915                 i=schedule_timeout(TR_RETRY_INTERVAL); /* wait 30 seconds */
 916                 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
 917         }
 918         outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
 919         DPRINTK("TERMINATED via signal\n");     /*BMS useful */
 920         return -EAGAIN;
 921 }
 922
 923 /*****************************************************************************/
 924
 925 #define COMMAND_OFST             0
 926 #define OPEN_OPTIONS_OFST        8
 927 #define NUM_RCV_BUF_OFST        24
 928 #define RCV_BUF_LEN_OFST        26
 929 #define DHB_LENGTH_OFST         28
 930 #define NUM_DHB_OFST            30
 931 #define DLC_MAX_SAP_OFST        32
 932 #define DLC_MAX_STA_OFST        33
 933
 934 void tok_open_adapter(unsigned long dev_addr)
 935 {
 936         struct net_device *dev = (struct net_device *) dev_addr;
 937         struct tok_info *ti;
 938         int i;
 939
 940         ti = (struct tok_info *) dev->priv;
 941         SET_PAGE(ti->init_srb_page);
 942         writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
 943         for (i = 0; i < sizeof(struct dir_open_adapter); i++)
 944                 writeb(0, ti->init_srb + i);
 945         writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
 946         writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
 947         if (ti->ring_speed == 16) {
 948                 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
 949                 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
 950                 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
 951         } else {
 952                 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
 953                 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
 954                 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
 955         }
 956         writeb(NUM_DHB,         /* always 2 */ ti->init_srb + NUM_DHB_OFST);
 957         writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
 958         writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
 959         ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
 960         ti->srb_page = ti->init_srb_page;
 961         DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
 962                 readb(ti->init_srb + NUM_DHB_OFST),
 963                 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
 964                 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
 965                 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
 966         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 967         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 968 }
 969
 970 /*****************************************************************************/
 971
 972 static void open_sap(unsigned char type, struct net_device *dev)
 973 {
 974         int i;
 975         struct tok_info *ti = (struct tok_info *) dev->priv;
 976
 977         SET_PAGE(ti->srb_page);
 978         for (i = 0; i < sizeof(struct dlc_open_sap); i++)
 979                 writeb(0, ti->srb + i);
 980
 981 #define MAX_I_FIELD_OFST        14
 982 #define SAP_VALUE_OFST          16
 983 #define SAP_OPTIONS_OFST        17
 984 #define STATION_COUNT_OFST      18
 985
 986         writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
 987         writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
 988         writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
 989         writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
 990         writeb(type, ti->srb + SAP_VALUE_OFST);
 991         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 992 }
 993
 994
 995 /*****************************************************************************/
 996
 997 static void tok_set_multicast_list(struct net_device *dev)
 998 {
 999         struct tok_info *ti = (struct tok_info *) dev->priv;
1000         struct dev_mc_list *mclist;
1001         unsigned char address[4];
1002
1003         int i;
1004
1005         /*BMS the next line is CRUCIAL or you may be sad when you */
1006         /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
1007         if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
1008         address[0] = address[1] = address[2] = address[3] = 0;
1009         mclist = dev->mc_list;
1010         for (i = 0; i < dev->mc_count; i++) {
1011                 address[0] |= mclist->dmi_addr[2];
1012                 address[1] |= mclist->dmi_addr[3];
1013                 address[2] |= mclist->dmi_addr[4];
1014                 address[3] |= mclist->dmi_addr[5];
1015                 mclist = mclist->next;
1016         }
1017         SET_PAGE(ti->srb_page);
1018         for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1019                 writeb(0, ti->srb + i);
1020
1021 #define FUNCT_ADDRESS_OFST 6
1022
1023         writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1024         for (i = 0; i < 4; i++)
1025                 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1026         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1027 #if TR_VERBOSE
1028         DPRINTK("Setting functional address: ");
1029         for (i=0;i<4;i++)  printk("%02X ", address[i]);
1030         printk("\n");
1031 #endif
1032 }
1033
1034 /*****************************************************************************/
1035
1036 #define STATION_ID_OFST 4
1037
1038 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1039 {
1040         struct tok_info *ti;
1041         unsigned long flags;
1042         ti = (struct tok_info *) dev->priv;
1043
1044         netif_stop_queue(dev);
1045
1046         /* lock against other CPUs */
1047         spin_lock_irqsave(&(ti->lock), flags);
1048
1049         /* Save skb; we'll need it when the adapter asks for the data */
1050         ti->current_skb = skb;
1051         SET_PAGE(ti->srb_page);
1052         writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1053         writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1054         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1055         spin_unlock_irqrestore(&(ti->lock), flags);
1056         dev->trans_start = jiffies;
1057         return 0;
1058 }
1059
1060 /*****************************************************************************/
1061
1062 static int tok_close(struct net_device *dev)
1063 {
1064         struct tok_info *ti = (struct tok_info *) dev->priv;
1065
1066         /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1067         /* unloading the module from memory, and then if a timer pops, ouch */
1068         del_timer_sync(&ti->tr_timer);
1069         outb(0, dev->base_addr + ADAPTRESET);
1070         ti->sram_virt |= 1;
1071         ti->open_status = CLOSED;
1072
1073         netif_stop_queue(dev);
1074         DPRINTK("Adapter is closed.\n");
1075         return 0;
1076 }
1077
1078 /*****************************************************************************/
1079
1080 #define RETCODE_OFST            2
1081 #define OPEN_ERROR_CODE_OFST    6
1082 #define ASB_ADDRESS_OFST        8
1083 #define SRB_ADDRESS_OFST        10
1084 #define ARB_ADDRESS_OFST        12
1085 #define SSB_ADDRESS_OFST        14
1086
1087 static char *printphase[]= {"Lobe media test","Physical insertion",
1088               "Address verification","Roll call poll","Request Parameters"};
1089 static char *printerror[]={"Function failure","Signal loss","Reserved",
1090                 "Frequency error","Timeout","Ring failure","Ring beaconing",
1091                 "Duplicate node address",
1092                 "Parameter request-retry count exceeded","Remove received",
1093                 "IMPL force received","Duplicate modifier",
1094                 "No monitor detected","Monitor contention failed for RPL"};
1095
1096 void dir_open_adapter (struct net_device *dev) {
1097
1098         struct tok_info *ti = (struct tok_info *) dev->priv;
1099         unsigned char ret_code;
1100         __u16 err;
1101
1102         ti->srb = ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST));
1103         ti->ssb = ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST));
1104         ti->arb = ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST));
1105         ti->asb = ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST));
1106         if (ti->page_mask) {
1107                 ti->srb_page = (ti->srb >> 8) & ti->page_mask;
1108                 ti->srb &= ~(ti->page_mask << 8);
1109                 ti->ssb_page = (ti->ssb >> 8) & ti->page_mask;
1110                 ti->ssb &= ~(ti->page_mask << 8);
1111                 ti->arb_page = (ti->arb >> 8) & ti->page_mask;
1112                 ti->arb &= ~(ti->page_mask << 8);
1113                 ti->asb_page = (ti->asb >> 8) & ti->page_mask;
1114                 ti->asb &= ~(ti->page_mask << 8);
1115         }
1116         ti->srb += ti->sram_virt;
1117         ti->ssb += ti->sram_virt;
1118         ti->arb += ti->sram_virt;
1119         ti->asb += ti->sram_virt;
1120         ti->current_skb = NULL;
1121         ret_code = readb(ti->init_srb + RETCODE_OFST);
1122         err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1123         if (!ret_code) {
1124                 ti->open_status = OPEN; /* TR adapter is now available */
1125                 if (ti->open_mode == AUTOMATIC) {
1126                         DPRINTK("Adapter reopened.\n");
1127                 }
1128                 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1129                 open_sap(EXTENDED_SAP, dev);
1130                 return;
1131         }
1132         ti->open_failure = YES;
1133         if (ret_code == 7){
1134                if (err == 0x24) {
1135                         if (!ti->auto_speedsave) {
1136                                 DPRINTK("Open failed: Adapter speed must match "
1137                                  "ring speed if Automatic Ring Speed Save is "
1138                                  "disabled.\n");
1139                                 ti->open_action = FAIL;
1140                         }else
1141                                 DPRINTK("Retrying open to adjust to "
1142                                         "ring speed, ");
1143                 } else if (err == 0x2d) {
1144                         DPRINTK("Physical Insertion: No Monitor Detected, ");
1145                         printk("retrying after %ds delay...\n",
1146                                         TR_RETRY_INTERVAL/HZ);
1147                 } else if (err == 0x11) {
1148                         DPRINTK("Lobe Media Function Failure (0x11), ");
1149                         printk(" retrying after %ds delay...\n",
1150                                         TR_RETRY_INTERVAL/HZ);
1151                 } else {
1152                         char **prphase = printphase;
1153                         char **prerror = printerror;
1154                         DPRINTK("TR Adapter misc open failure, error code = ");
1155                         printk("0x%x, Phase: %s, Error: %s\n",
1156                                 err, prphase[err/16 -1], prerror[err%16 -1]);
1157                         printk(" retrying after %ds delay...\n",
1158                                         TR_RETRY_INTERVAL/HZ);
1159                 }
1160         } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1161         if (ti->open_action != FAIL) {
1162                 if (ti->open_mode==AUTOMATIC){
1163                         ti->open_action = REOPEN;
1164                         ibmtr_reset_timer(&(ti->tr_timer), dev);
1165                         return;
1166                 }
1167                 wake_up(&ti->wait_for_reset);
1168                 return;
1169         }
1170         DPRINTK("FAILURE, CAPUT\n");
1171 }
1172
1173 /******************************************************************************/
1174
1175 irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1176 {
1177         unsigned char status;
1178         /*  unsigned char status_even ; */
1179         struct tok_info *ti;
1180         struct net_device *dev;
1181 #ifdef ENABLE_PAGING
1182         unsigned char save_srpr;
1183 #endif
1184
1185         dev = dev_id;
1186 #if TR_VERBOSE
1187         DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
1188 #endif
1189         ti = (struct tok_info *) dev->priv;
1190         if (ti->sram_virt & 1)
1191                 return IRQ_NONE;         /* PCMCIA card extraction flag */
1192         spin_lock(&(ti->lock));
1193 #ifdef ENABLE_PAGING
1194         save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1195 #endif
1196
1197         /* Disable interrupts till processing is finished */
1198         writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1199
1200         /* Reset interrupt for ISA boards */
1201         if (ti->adapter_int_enable)
1202                 outb(0, ti->adapter_int_enable);
1203         else /* used for PCMCIA cards */
1204                 outb(0, ti->global_int_enable);
1205         if (ti->do_tok_int == FIRST_INT){
1206                 initial_tok_int(dev);
1207 #ifdef ENABLE_PAGING
1208                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1209 #endif
1210                 spin_unlock(&(ti->lock));
1211                 return IRQ_HANDLED;
1212         }
1213         /*  Begin interrupt handler HERE inline to avoid the extra
1214             levels of logic and call depth for the original solution. */
1215         status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1216         /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1217         /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1218         /*BMS                                       status,status_even);      */
1219
1220         if (status & ADAP_CHK_INT) {
1221                 int i;
1222                 __u32 check_reason;
1223                 __u8 check_reason_page = 0;
1224                 check_reason =
1225                         ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN));
1226                 if (ti->page_mask) {
1227                         check_reason_page = (check_reason >> 8) & ti->page_mask;
1228                         check_reason &= ~(ti->page_mask << 8);
1229                 }
1230                 check_reason += ti->sram_virt;
1231                 SET_PAGE(check_reason_page);
1232
1233                 DPRINTK("Adapter check interrupt\n");
1234                 DPRINTK("8 reason bytes follow: ");
1235                 for (i = 0; i < 8; i++, check_reason++)
1236                         printk("%02X ", (int) readb(check_reason));
1237                 printk("\n");
1238                 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1239                 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1240                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1241                 ti->open_status = CLOSED;
1242                 ti->sap_status  = CLOSED;
1243                 ti->open_mode   = AUTOMATIC;
1244                 dev->flags &= ~IFF_RUNNING;
1245                 netif_stop_queue(dev);
1246                 ti->open_action = RESTART;
1247                 outb(0, dev->base_addr + ADAPTRESET);
1248                 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1249                 spin_unlock(&(ti->lock));
1250                 return IRQ_HANDLED;
1251         }
1252         if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1253                 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1254                 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1255                         (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1256                 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1257                         ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1258                 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1259                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1260                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1261 #ifdef ENABLE_PAGING
1262                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1263 #endif
1264                 spin_unlock(&(ti->lock));
1265                 return IRQ_HANDLED;
1266         }
1267         if (status & SRB_RESP_INT) {    /* SRB response */
1268                 SET_PAGE(ti->srb_page);
1269 #if TR_VERBOSE
1270                 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1271                                 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1272 #endif
1273                 switch (readb(ti->srb)) {       /* SRB command check */
1274                 case XMIT_DIR_FRAME:{
1275                         unsigned char xmit_ret_code;
1276                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1277                         if (xmit_ret_code == 0xff) break;
1278                         DPRINTK("error on xmit_dir_frame request: %02X\n",
1279                                                                 xmit_ret_code);
1280                         if (ti->current_skb) {
1281                                 dev_kfree_skb_irq(ti->current_skb);
1282                                 ti->current_skb = NULL;
1283                         }
1284                         /*dev->tbusy = 0;*/
1285                         netif_wake_queue(dev);
1286                         if (ti->readlog_pending)
1287                                 ibmtr_readlog(dev);
1288                         break;
1289                 }
1290                 case XMIT_UI_FRAME:{
1291                         unsigned char xmit_ret_code;
1292
1293                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1294                         if (xmit_ret_code == 0xff) break;
1295                         DPRINTK("error on xmit_ui_frame request: %02X\n",
1296                                                                 xmit_ret_code);
1297                         if (ti->current_skb) {
1298                                 dev_kfree_skb_irq(ti->current_skb);
1299                                 ti->current_skb = NULL;
1300                         }
1301                         netif_wake_queue(dev);
1302                         if (ti->readlog_pending)
1303                                 ibmtr_readlog(dev);
1304                         break;
1305                 }
1306                 case DIR_OPEN_ADAPTER:
1307                         dir_open_adapter(dev);
1308                         break;
1309                 case DLC_OPEN_SAP:
1310                         if (readb(ti->srb + RETCODE_OFST)) {
1311                                 DPRINTK("open_sap failed: ret_code = %02X, "
1312                                         "retrying\n",
1313                                         (int) readb(ti->srb + RETCODE_OFST));
1314                                 ti->open_action = REOPEN;
1315                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1316                                 break;
1317                         }
1318                         ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1319                         ti->sap_status = OPEN;/* TR adapter is now available */
1320                         if (ti->open_mode==MANUAL){
1321                                 wake_up(&ti->wait_for_reset);
1322                                 break;
1323                         }
1324                         netif_wake_queue(dev);
1325                         dev->flags |= IFF_RUNNING;/*BMS 12/2000*/
1326                         break;
1327                 case DIR_INTERRUPT:
1328                 case DIR_MOD_OPEN_PARAMS:
1329                 case DIR_SET_GRP_ADDR:
1330                 case DIR_SET_FUNC_ADDR:
1331                 case DLC_CLOSE_SAP:
1332                         if (readb(ti->srb + RETCODE_OFST))
1333                                 DPRINTK("error on %02X: %02X\n",
1334                                         (int) readb(ti->srb + COMMAND_OFST),
1335                                         (int) readb(ti->srb + RETCODE_OFST));
1336                         break;
1337                 case DIR_READ_LOG:
1338                         if (readb(ti->srb + RETCODE_OFST)){
1339                                 DPRINTK("error on dir_read_log: %02X\n",
1340                                         (int) readb(ti->srb + RETCODE_OFST));
1341                                 netif_wake_queue(dev);
1342                                 break;
1343                         }
1344 #if IBMTR_DEBUG_MESSAGES
1345
1346 #define LINE_ERRORS_OFST                 0
1347 #define INTERNAL_ERRORS_OFST             1
1348 #define BURST_ERRORS_OFST                2
1349 #define AC_ERRORS_OFST                   3
1350 #define ABORT_DELIMITERS_OFST            4
1351 #define LOST_FRAMES_OFST                 6
1352 #define RECV_CONGEST_COUNT_OFST          7
1353 #define FRAME_COPIED_ERRORS_OFST         8
1354 #define FREQUENCY_ERRORS_OFST            9
1355 #define TOKEN_ERRORS_OFST               10
1356
1357                         DPRINTK("Line errors %02X, Internal errors %02X, "
1358                         "Burst errors %02X\n" "A/C errors %02X, "
1359                         "Abort delimiters %02X, Lost frames %02X\n"
1360                         "Receive congestion count %02X, "
1361                         "Frame copied errors %02X\nFrequency errors %02X, "
1362                         "Token errors %02X\n",
1363                         (int) readb(ti->srb + LINE_ERRORS_OFST),
1364                         (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1365                         (int) readb(ti->srb + BURST_ERRORS_OFST),
1366                         (int) readb(ti->srb + AC_ERRORS_OFST),
1367                         (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1368                         (int) readb(ti->srb + LOST_FRAMES_OFST),
1369                         (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1370                         (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1371                         (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1372                         (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1373 #endif
1374                         netif_wake_queue(dev);
1375                         break;
1376                 default:
1377                         DPRINTK("Unknown command %02X encountered\n",
1378                                                 (int) readb(ti->srb));
1379                 }       /* end switch SRB command check */
1380                 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1381         }       /* if SRB response */
1382         if (status & ASB_FREE_INT) {    /* ASB response */
1383                 SET_PAGE(ti->asb_page);
1384 #if TR_VERBOSE
1385                 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1386 #endif
1387
1388                 switch (readb(ti->asb)) {       /* ASB command check */
1389                 case REC_DATA:
1390                 case XMIT_UI_FRAME:
1391                 case XMIT_DIR_FRAME:
1392                         break;
1393                 default:
1394                         DPRINTK("unknown command in asb %02X\n",
1395                                                 (int) readb(ti->asb));
1396                 }       /* switch ASB command check */
1397                 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1398                         DPRINTK("ASB error %02X in cmd %02X\n",
1399                                 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1400                 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1401         }       /* if ASB response */
1402
1403 #define STATUS_OFST             6
1404 #define NETW_STATUS_OFST        6
1405
1406         if (status & ARB_CMD_INT) {     /* ARB response */
1407                 SET_PAGE(ti->arb_page);
1408 #if TR_VERBOSE
1409                 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1410 #endif
1411
1412                 switch (readb(ti->arb)) {       /* ARB command check */
1413                 case DLC_STATUS:
1414                         DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1415                                 ntohs(readw(ti->arb + STATUS_OFST)),
1416                                 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1417                         break;
1418                 case REC_DATA:
1419                         tr_rx(dev);
1420                         break;
1421                 case RING_STAT_CHANGE:{
1422                         unsigned short ring_status;
1423                         ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1424                         if (ibmtr_debug_trace & TRC_INIT)
1425                                 DPRINTK("Ring Status Change...(0x%x)\n",
1426                                                                 ring_status);
1427                         if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1428                                 netif_stop_queue(dev);
1429                                 dev->flags &= ~IFF_RUNNING;/*not typical Linux*/
1430                                 DPRINTK("Remove received, or Auto-removal error"
1431                                         ", or Lobe fault\n");
1432                                 DPRINTK("We'll try to reopen the closed adapter"
1433                                         " after a %d second delay.\n",
1434                                                 TR_RETRY_INTERVAL/HZ);
1435                                 /*I was confused: I saw the TR reopening but */
1436                                 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1437                                 /*but adapter not in the ring, the TR will   */
1438                                 /* open, and then soon close and come here.  */
1439                                 ti->open_mode = AUTOMATIC;
1440                                 ti->open_status = CLOSED; /*12/2000 BMS*/
1441                                 ti->open_action = REOPEN;
1442                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1443                         } else if (ring_status & LOG_OVERFLOW) {
1444                                 if(netif_queue_stopped(dev))
1445                                         ti->readlog_pending = 1;
1446                                 else
1447                                         ibmtr_readlog(dev);
1448                         }
1449                         break;
1450                 }
1451                 case XMIT_DATA_REQ:
1452                         tr_tx(dev);
1453                         break;
1454                 default:
1455                         DPRINTK("Unknown command %02X in arb\n",
1456                                                 (int) readb(ti->arb));
1457                         break;
1458                 }       /* switch ARB command check */
1459                 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1460                 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1461         }       /* if ARB response */
1462         if (status & SSB_RESP_INT) {    /* SSB response */
1463                 unsigned char retcode;
1464                 SET_PAGE(ti->ssb_page);
1465 #if TR_VERBOSE
1466                 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1467                                 readb(ti->ssb), readb(ti->ssb + 2));
1468 #endif
1469
1470                 switch (readb(ti->ssb)) {       /* SSB command check */
1471                 case XMIT_DIR_FRAME:
1472                 case XMIT_UI_FRAME:
1473                         retcode = readb(ti->ssb + 2);
1474                         if (retcode && (retcode != 0x22))/* checks ret_code */
1475                                 DPRINTK("xmit ret_code: %02X xmit error code: "
1476                                         "%02X\n",
1477                                         (int)retcode, (int)readb(ti->ssb + 6));
1478                         else
1479                                 ti->tr_stats.tx_packets++;
1480                         break;
1481                 case XMIT_XID_CMD:
1482                         DPRINTK("xmit xid ret_code: %02X\n",
1483                                                 (int) readb(ti->ssb + 2));
1484                 default:
1485                         DPRINTK("Unknown command %02X in ssb\n",
1486                                                 (int) readb(ti->ssb));
1487                 }       /* SSB command check */
1488                 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1489                 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1490         }       /* if SSB response */
1491 #ifdef ENABLE_PAGING
1492         writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1493 #endif
1494         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1495         spin_unlock(&(ti->lock));
1496         return IRQ_HANDLED;
1497 }                               /*tok_interrupt */
1498
1499 /*****************************************************************************/
1500
1501 #define INIT_STATUS_OFST        1
1502 #define INIT_STATUS_2_OFST      2
1503 #define ENCODED_ADDRESS_OFST    8
1504
1505 static void initial_tok_int(struct net_device *dev)
1506 {
1507
1508         __u32 encoded_addr, hw_encoded_addr;
1509         struct tok_info *ti;
1510         unsigned char init_status; /*BMS 12/2000*/
1511
1512         ti = (struct tok_info *) dev->priv;
1513
1514         ti->do_tok_int = NOT_FIRST;
1515
1516         /* we assign the shared-ram address for ISA devices */
1517         writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1518 #ifndef PCMCIA
1519         ti->sram_virt = (u32)ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1520 #endif
1521         ti->init_srb = ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN));
1522         if (ti->page_mask) {
1523                 ti->init_srb_page = (ti->init_srb >> 8) & ti->page_mask;
1524                 ti->init_srb &= ~(ti->page_mask << 8);
1525         }
1526         ti->init_srb += ti->sram_virt;
1527         if (ti->page_mask && ti->avail_shared_ram == 127) {
1528                 int last_512 = 0xfe00, i;
1529                 int last_512_page=0;
1530                 last_512_page=(last_512>>8)&ti->page_mask;
1531                 last_512 &= ~(ti->page_mask << 8);
1532                 /* initialize high section of ram (if necessary) */
1533                 SET_PAGE(last_512_page);
1534                 for (i = 0; i < 512; i++)
1535                         writeb(0, ti->sram_virt + last_512 + i);
1536         }
1537         SET_PAGE(ti->init_srb_page);
1538
1539 #if TR_VERBOSE
1540         {
1541         int i;
1542
1543         DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1544         DPRINTK("init_srb(%x):", (ti->init_srb) );
1545         for (i = 0; i < 20; i++)
1546                 printk("%02X ", (int) readb(ti->init_srb + i));
1547         printk("\n");
1548         }
1549 #endif
1550
1551         hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1552         encoded_addr = ntohs(hw_encoded_addr);
1553         init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1554         readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1555         /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1556         ti->ring_speed = init_status & 0x01 ? 16 : 4;
1557         DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1558                                 ti->ring_speed, (unsigned int)dev->mem_start);
1559         ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
1560
1561         if (ti->open_mode == MANUAL)    wake_up(&ti->wait_for_reset);
1562         else                            tok_open_adapter((unsigned long)dev);
1563
1564 } /*initial_tok_int() */
1565
1566 /*****************************************************************************/
1567
1568 #define CMD_CORRELATE_OFST      1
1569 #define DHB_ADDRESS_OFST        6
1570
1571 #define FRAME_LENGTH_OFST       6
1572 #define HEADER_LENGTH_OFST      8
1573 #define RSAP_VALUE_OFST         9
1574
1575 static void tr_tx(struct net_device *dev)
1576 {
1577         struct tok_info *ti = (struct tok_info *) dev->priv;
1578         struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1579         unsigned int hdr_len;
1580         __u32 dhb=0,dhb_base;
1581         unsigned char xmit_command;
1582         int i,dhb_len=0x4000,src_len,src_offset;
1583         struct trllc *llc;
1584         struct srb_xmit xsrb;
1585         __u8 dhb_page = 0;
1586         __u8 llc_ssap;
1587
1588         SET_PAGE(ti->asb_page);
1589
1590         if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1591
1592         /* in providing the transmit interrupts, is telling us it is ready for
1593            data and providing a shared memory address for us to stuff with data.
1594            Here we compute the effective address where we will place data.
1595         */
1596         SET_PAGE(ti->arb_page);
1597         dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1598         if (ti->page_mask) {
1599                 dhb_page = (dhb_base >> 8) & ti->page_mask;
1600                 dhb=dhb_base & ~(ti->page_mask << 8);
1601         }
1602         dhb += ti->sram_virt;
1603
1604         /* Figure out the size of the 802.5 header */
1605         if (!(trhdr->saddr[0] & 0x80))  /* RIF present? */
1606                 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1607         else
1608                 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1609                     + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1610
1611         llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1612
1613         llc_ssap = llc->ssap;
1614         SET_PAGE(ti->srb_page);
1615         memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1616         SET_PAGE(ti->asb_page);
1617         xmit_command = xsrb.command;
1618
1619         writeb(xmit_command, ti->asb + COMMAND_OFST);
1620         writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1621         writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1622         writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1623         writeb(0, ti->asb + RETCODE_OFST);
1624         if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1625                 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1626                 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1627                 SET_PAGE(dhb_page);
1628                 writeb(AC, dhb);
1629                 writeb(LLC_FRAME, dhb + 1);
1630                 for (i = 0; i < TR_ALEN; i++)
1631                         writeb((int) 0x0FF, dhb + i + 2);
1632                 for (i = 0; i < TR_ALEN; i++)
1633                         writeb(0, dhb + i + TR_ALEN + 2);
1634                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1635                 return;
1636         }
1637         /*
1638          *    the token ring packet is copied from sk_buff to the adapter
1639          *    buffer identified in the command data received with the interrupt.
1640          */
1641         writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1642         writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1643         src_len=ti->current_skb->len;
1644         src_offset=0;
1645         dhb=dhb_base;
1646         while(1) {
1647                 if (ti->page_mask) {
1648                         dhb_page=(dhb >> 8) & ti->page_mask;
1649                         dhb=dhb & ~(ti->page_mask << 8);
1650                         dhb_len=0x4000-dhb; /* remaining size of this page */
1651                 }
1652                 dhb+=ti->sram_virt;
1653                 SET_PAGE(dhb_page);
1654                 if (src_len > dhb_len) {
1655                         memcpy_toio(dhb,&ti->current_skb->data[src_offset],
1656                                         dhb_len);
1657                         src_len -= dhb_len;
1658                         src_offset += dhb_len;
1659                         dhb_base+=dhb_len;
1660                         dhb=dhb_base;
1661                         continue;
1662                 }
1663                 memcpy_toio(dhb, &ti->current_skb->data[src_offset], src_len);
1664                 break;
1665         }
1666         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1667         ti->tr_stats.tx_bytes += ti->current_skb->len;
1668         dev_kfree_skb_irq(ti->current_skb);
1669         ti->current_skb = NULL;
1670         netif_wake_queue(dev);
1671         if (ti->readlog_pending)
1672                 ibmtr_readlog(dev);
1673 }                               /*tr_tx */
1674
1675 /*****************************************************************************/
1676
1677
1678 #define RECEIVE_BUFFER_OFST     6
1679 #define LAN_HDR_LENGTH_OFST     8
1680 #define DLC_HDR_LENGTH_OFST     9
1681
1682 #define DSAP_OFST               0
1683 #define SSAP_OFST               1
1684 #define LLC_OFST                2
1685 #define PROTID_OFST             3
1686 #define ETHERTYPE_OFST          6
1687
1688 static void tr_rx(struct net_device *dev)
1689 {
1690         struct tok_info *ti = (struct tok_info *) dev->priv;
1691         __u32 rbuffer, rbufdata;
1692         __u8 rbuffer_page = 0;
1693         __u32 llc;
1694         unsigned char *data;
1695         unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1696         unsigned char dlc_hdr_len;
1697         struct sk_buff *skb;
1698         unsigned int skb_size = 0;
1699         int IPv4_p = 0;
1700         unsigned int chksum = 0;
1701         struct iphdr *iph;
1702         struct arb_rec_req rarb;
1703
1704         SET_PAGE(ti->arb_page);
1705         memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1706         rbuffer = ntohs(rarb.rec_buf_addr) ;
1707         if (ti->page_mask) {
1708                 rbuffer_page = (rbuffer >> 8) & ti->page_mask;
1709                 rbuffer &= ~(ti->page_mask << 8);
1710         }
1711         rbuffer += ti->sram_virt;
1712
1713         SET_PAGE(ti->asb_page);
1714
1715         if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1716
1717         writeb(REC_DATA, ti->asb + COMMAND_OFST);
1718         writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1719         writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1720
1721         lan_hdr_len = rarb.lan_hdr_len;
1722         if (lan_hdr_len > sizeof(struct trh_hdr)) {
1723                 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1724                 return;
1725         }                       /*BMS I added this above just to be very safe */
1726         dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1727         hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1728
1729         SET_PAGE(rbuffer_page);
1730         llc = (rbuffer + offsetof(struct rec_buf, data) + lan_hdr_len);
1731
1732 #if TR_VERBOSE
1733         DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1734         (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1735         DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1736                 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1737         DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1738                 "ethertype: %04X\n",
1739                 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1740                 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1741                 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1742                 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1743 #endif
1744         if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1745                 SET_PAGE(ti->asb_page);
1746                 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1747                 ti->tr_stats.rx_dropped++;
1748                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1749                 return;
1750         }
1751         length = ntohs(rarb.frame_len);
1752         if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1753            readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1754                 length >= hdr_len)      IPv4_p = 1;
1755 #if TR_VERBOSE
1756 #define SADDR_OFST      8
1757 #define DADDR_OFST      2
1758
1759         if (!IPv4_p) {
1760
1761                 __u32 trhhdr;
1762
1763                 trhhdr = (rbuffer + offsetof(struct rec_buf, data));
1764
1765                 DPRINTK("Probably non-IP frame received.\n");
1766                 DPRINTK("ssap: %02X dsap: %02X "
1767                         "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
1768                         "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
1769                         readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1770                         readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
1771                         readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
1772                         readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
1773                         readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
1774                         readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
1775                         readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
1776         }
1777 #endif
1778
1779         /*BMS handle the case she comes in with few hops but leaves with many */
1780         skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1781
1782         if (!(skb = dev_alloc_skb(skb_size))) {
1783                 DPRINTK("out of memory. frame dropped.\n");
1784                 ti->tr_stats.rx_dropped++;
1785                 SET_PAGE(ti->asb_page);
1786                 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1787                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1788                 return;
1789         }
1790         /*BMS again, if she comes in with few but leaves with many */
1791         skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1792         skb_put(skb, length);
1793         skb->dev = dev;
1794         data = skb->data;
1795         rbuffer_len = ntohs(readw(rbuffer + offsetof(struct rec_buf, buf_len)));
1796         rbufdata = rbuffer + offsetof(struct rec_buf, data);
1797
1798         if (IPv4_p) {
1799                 /* Copy the headers without checksumming */
1800                 memcpy_fromio(data, rbufdata, hdr_len);
1801
1802                 /* Watch for padded packets and bogons */
1803                 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1804                 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1805                 length -= hdr_len;
1806                 if ((ip_len <= length) && (ip_len > 7))
1807                         length = ip_len;
1808                 data += hdr_len;
1809                 rbuffer_len -= hdr_len;
1810                 rbufdata += hdr_len;
1811         }
1812         /* Copy the payload... */
1813 #define BUFFER_POINTER_OFST     2
1814 #define BUFFER_LENGTH_OFST      6
1815         for (;;) {
1816                 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1817                         DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1818                                                 length,rbuffer_len);
1819                 if (IPv4_p)
1820                         chksum=csum_partial_copy_nocheck((void*)rbufdata,
1821                             data,length<rbuffer_len?length:rbuffer_len,chksum);
1822                 else
1823                         memcpy_fromio(data, rbufdata, rbuffer_len);
1824                 rbuffer = ntohs(readw(rbuffer+BUFFER_POINTER_OFST)) ;
1825                 if (!rbuffer)
1826                         break;
1827                 rbuffer -= 2;
1828                 length -= rbuffer_len;
1829                 data += rbuffer_len;
1830                 if (ti->page_mask) {
1831                         rbuffer_page = (rbuffer >> 8) & ti->page_mask;
1832                         rbuffer &= ~(ti->page_mask << 8);
1833                 }
1834                 rbuffer += ti->sram_virt;
1835                 SET_PAGE(rbuffer_page);
1836                 rbuffer_len = ntohs(readw(rbuffer + BUFFER_LENGTH_OFST));
1837                 rbufdata = rbuffer + offsetof(struct rec_buf, data);
1838         }
1839
1840         SET_PAGE(ti->asb_page);
1841         writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1842
1843         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1844
1845         ti->tr_stats.rx_bytes += skb->len;
1846         ti->tr_stats.rx_packets++;
1847
1848         skb->protocol = tr_type_trans(skb, dev);
1849         if (IPv4_p) {
1850                 skb->csum = chksum;
1851                 skb->ip_summed = 1;
1852         }
1853         netif_rx(skb);
1854         dev->last_rx = jiffies;
1855 }                               /*tr_rx */
1856
1857 /*****************************************************************************/
1858
1859 void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1860 {
1861         tmr->expires = jiffies + TR_RETRY_INTERVAL;
1862         tmr->data = (unsigned long) dev;
1863         tmr->function = tok_rerun;
1864         init_timer(tmr);
1865         add_timer(tmr);
1866 }
1867
1868 /*****************************************************************************/
1869
1870 void tok_rerun(unsigned long dev_addr){
1871
1872         struct net_device *dev = (struct net_device *)dev_addr;
1873         struct tok_info *ti = (struct tok_info *) dev->priv;
1874
1875         if ( ti->open_action == RESTART){
1876                 ti->do_tok_int = FIRST_INT;
1877                 outb(0, dev->base_addr + ADAPTRESETREL);
1878 #ifdef ENABLE_PAGING
1879                 if (ti->page_mask)
1880                         writeb(SRPR_ENABLE_PAGING,
1881                                 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1882 #endif
1883
1884                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1885         } else
1886                 tok_open_adapter(dev_addr);
1887 }
1888
1889 /*****************************************************************************/
1890
1891 void ibmtr_readlog(struct net_device *dev)
1892 {
1893         struct tok_info *ti;
1894
1895         ti = (struct tok_info *) dev->priv;
1896
1897         ti->readlog_pending = 0;
1898         SET_PAGE(ti->srb_page);
1899         writeb(DIR_READ_LOG, ti->srb);
1900         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1901         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1902
1903         netif_stop_queue(dev);
1904
1905 }
1906
1907 /*****************************************************************************/
1908
1909 /* tok_get_stats():  Basically a scaffold routine which will return
1910    the address of the tr_statistics structure associated with
1911    this device -- the tr.... structure is an ethnet look-alike
1912    so at least for this iteration may suffice.   */
1913
1914 static struct net_device_stats *tok_get_stats(struct net_device *dev)
1915 {
1916
1917         struct tok_info *toki;
1918         toki = (struct tok_info *) dev->priv;
1919         return (struct net_device_stats *) &toki->tr_stats;
1920 }
1921
1922 /*****************************************************************************/
1923
1924 int ibmtr_change_mtu(struct net_device *dev, int mtu)
1925 {
1926         struct tok_info *ti = (struct tok_info *) dev->priv;
1927
1928         if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1929                 return -EINVAL;
1930         if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1931                 return -EINVAL;
1932         dev->mtu = mtu;
1933         return 0;
1934 }
1935
1936 /*****************************************************************************/
1937 #ifdef MODULE
1938
1939 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1940 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1941 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1942 static int irq[IBMTR_MAX_ADAPTERS];
1943 static int mem[IBMTR_MAX_ADAPTERS];
1944
1945 MODULE_LICENSE("GPL");
1946
1947 MODULE_PARM(io, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i");
1948 MODULE_PARM(irq, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i");
1949 MODULE_PARM(mem, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i");
1950
1951 static int __init ibmtr_init(void)
1952 {
1953         int i;
1954         int count=0;
1955
1956         find_turbo_adapters(io);
1957
1958         for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1959                 struct net_device *dev;
1960                 irq[i] = 0;
1961                 mem[i] = 0;
1962                 dev = alloc_trdev(sizeof(struct tok_info));
1963                 if (dev == NULL) {
1964                         if (i == 0)
1965                                 return -ENOMEM;
1966                         break;
1967                 }
1968                 dev->base_addr = io[i];
1969                 dev->irq = irq[i];
1970                 dev->mem_start = mem[i];
1971
1972                 if (ibmtr_probe_card(dev)) {
1973                         free_netdev(dev);
1974                         continue;
1975                 }
1976                 dev_ibmtr[i] = dev;
1977                 count++;
1978         }
1979         if (count) return 0;
1980         printk("ibmtr: register_netdev() returned non-zero.\n");
1981         return -EIO;
1982 }
1983 module_init(ibmtr_init);
1984
1985 static void __exit ibmtr_cleanup(void)
1986 {
1987         int i;
1988
1989         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1990                 if (!dev_ibmtr[i])
1991                         continue;
1992                 unregister_netdev(dev_ibmtr[i]);
1993                 ibmtr_cleanup_card(dev_ibmtr[i]);
1994                 free_netdev(dev_ibmtr[i]);
1995         }
1996 }
1997 module_exit(ibmtr_cleanup);
1998 #endif