git.oblomov.eu Git - linux-2.6/blob - 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/ip.h>
 131 #include <linux/trdevice.h>
 132 #include <linux/ibmtr.h>
 133
 134 #include <net/checksum.h>
 135
 136 #include <asm/io.h>
 137
 138 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
 139 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
 140
 141 /* version and credits */
 142 #ifndef PCMCIA
 143 static char version[] __initdata =
 144     "\nibmtr.c: v1.3.57   8/ 7/94 Peter De Schrijver and Mark Swanson\n"
 145     "         v2.1.125 10/20/98 Paul Norton    <pnorton@ieee.org>\n"
 146     "         v2.2.0   12/30/98 Joel Sloan     <jjs@c-me.com>\n"
 147     "         v2.2.1   02/08/00 Mike Sullivan  <sullivam@us.ibm.com>\n"
 148     "         v2.2.2   07/27/00 Burt Silverman <burts@us.ibm.com>\n"
 149     "         v2.4.0   03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
 150 #endif
 151
 152 /* this allows displaying full adapter information */
 153
 154 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
 155
 156 static char pcchannelid[] __devinitdata = {
 157         0x05, 0x00, 0x04, 0x09,
 158         0x04, 0x03, 0x04, 0x0f,
 159         0x03, 0x06, 0x03, 0x01,
 160         0x03, 0x01, 0x03, 0x00,
 161         0x03, 0x09, 0x03, 0x09,
 162         0x03, 0x00, 0x02, 0x00
 163 };
 164
 165 static char mcchannelid[] __devinitdata =  {
 166         0x04, 0x0d, 0x04, 0x01,
 167         0x05, 0x02, 0x05, 0x03,
 168         0x03, 0x06, 0x03, 0x03,
 169         0x05, 0x08, 0x03, 0x04,
 170         0x03, 0x05, 0x03, 0x01,
 171         0x03, 0x08, 0x02, 0x00
 172 };
 173
 174 static char __devinit *adapter_def(char type)
 175 {
 176         switch (type) {
 177         case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
 178         case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
 179         case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
 180         case 0xC: return "Auto 16/4 Adapter";
 181         default: return "adapter (unknown type)";
 182         };
 183 };
 184
 185 #define TRC_INIT 0x01           /*  Trace initialization & PROBEs */
 186 #define TRC_INITV 0x02          /*  verbose init trace points     */
 187 static unsigned char ibmtr_debug_trace = 0;
 188
 189 static int      ibmtr_probe(struct net_device *dev);
 190 static int      ibmtr_probe1(struct net_device *dev, int ioaddr);
 191 static unsigned char get_sram_size(struct tok_info *adapt_info);
 192 static int      trdev_init(struct net_device *dev);
 193 static int      tok_open(struct net_device *dev);
 194 static int      tok_init_card(struct net_device *dev);
 195 static void     tok_open_adapter(unsigned long dev_addr);
 196 static void     open_sap(unsigned char type, struct net_device *dev);
 197 static void     tok_set_multicast_list(struct net_device *dev);
 198 static int      tok_send_packet(struct sk_buff *skb, struct net_device *dev);
 199 static int      tok_close(struct net_device *dev);
 200 static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 201 static void     initial_tok_int(struct net_device *dev);
 202 static void     tr_tx(struct net_device *dev);
 203 static void     tr_rx(struct net_device *dev);
 204 static void     ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
 205 static void     tok_rerun(unsigned long dev_addr);
 206 static void     ibmtr_readlog(struct net_device *dev);
 207 static struct   net_device_stats *tok_get_stats(struct net_device *dev);
 208 static int      ibmtr_change_mtu(struct net_device *dev, int mtu);
 209 static void     find_turbo_adapters(int *iolist);
 210
 211 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
 212         0xa20, 0xa24, 0, 0, 0
 213 };
 214 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
 215 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
 216 static int __devinitdata turbo_searched = 0;
 217
 218 #ifndef PCMCIA
 219 static __u32 ibmtr_mem_base __initdata = 0xd0000;
 220 #endif
 221
 222 static void __devinit PrtChanID(char *pcid, short stride)
 223 {
 224         short i, j;
 225         for (i = 0, j = 0; i < 24; i++, j += stride)
 226                 printk("%1x", ((int) pcid[j]) & 0x0f);
 227         printk("\n");
 228 }
 229
 230 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
 231 {
 232         short i, j;
 233         for (i = 0, j = 0; i < 24; i++, j += stride)
 234                 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
 235         printk("\n");
 236 }
 237
 238 /* We have to ioremap every checked address, because isa_readb is
 239  * going away.
 240  */
 241
 242 static void __devinit find_turbo_adapters(int *iolist)
 243 {
 244         int ram_addr;
 245         int index=0;
 246         void __iomem *chanid;
 247         int found_turbo=0;
 248         unsigned char *tchanid, ctemp;
 249         int i, j;
 250         unsigned long jif;
 251         void __iomem *ram_mapped ;
 252
 253         if (turbo_searched == 1) return;
 254         turbo_searched=1;
 255         for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
 256
 257                 __u32 intf_tbl=0;
 258
 259                 found_turbo=1;
 260                 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
 261                 if (ram_mapped==NULL)
 262                         continue ;
 263                 chanid=(CHANNEL_ID + ram_mapped);
 264                 tchanid=pcchannelid;
 265                 ctemp=readb(chanid) & 0x0f;
 266                 if (ctemp != *tchanid) continue;
 267                 for (i=2,j=1; i<=46; i=i+2,j++) {
 268                         if ((readb(chanid+i) & 0x0f) != tchanid[j]){
 269                                 found_turbo=0;
 270                                 break;
 271                         }
 272                 }
 273                 if (!found_turbo) continue;
 274
 275                 writeb(0x90, ram_mapped+0x1E01);
 276                 for(i=2; i<0x0f; i++) {
 277                         writeb(0x00, ram_mapped+0x1E01+i);
 278                 }
 279                 writeb(0x00, ram_mapped+0x1E01);
 280                 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
 281                 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
 282                 if (intf_tbl) {
 283 #if IBMTR_DEBUG_MESSAGES
 284                         printk("ibmtr::find_turbo_adapters, Turbo found at "
 285                                 "ram_addr %x\n",ram_addr);
 286                         printk("ibmtr::find_turbo_adapters, interface_table ");
 287                         for(i=0; i<6; i++) {
 288                                 printk("%x:",readb(ram_addr+intf_tbl+i));
 289                         }
 290                         printk("\n");
 291 #endif
 292                         turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
 293                         turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
 294                         outb(0, turbo_io[index] + ADAPTRESET);
 295                         for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
 296                         outb(0, turbo_io[index] + ADAPTRESETREL);
 297                         index++;
 298                         continue;
 299                 }
 300 #if IBMTR_DEBUG_MESSAGES
 301                 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
 302                         " %x but not a Turbo model\n",ram_addr);
 303 #endif
 304         iounmap(ram_mapped) ;
 305         } /* for */
 306         for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
 307                 if(!turbo_io[i]) break;
 308                 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
 309                         if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
 310                         iolist[j]=turbo_io[i];
 311                         break;
 312                 }
 313         }
 314 }
 315
 316 static void ibmtr_cleanup_card(struct net_device *dev)
 317 {
 318         if (dev->base_addr) {
 319                 outb(0,dev->base_addr+ADAPTRESET);
 320
 321                 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
 322
 323                 outb(0,dev->base_addr+ADAPTRESETREL);
 324         }
 325
 326 #ifndef PCMCIA
 327         free_irq(dev->irq, dev);
 328         release_region(dev->base_addr, IBMTR_IO_EXTENT);
 329
 330         {
 331                 struct tok_info *ti = (struct tok_info *) dev->priv;
 332                 iounmap(ti->mmio);
 333                 iounmap(ti->sram_virt);
 334         }
 335 #endif
 336 }
 337
 338 int ibmtr_probe_card(struct net_device *dev)
 339 {
 340         int err = ibmtr_probe(dev);
 341         if (!err) {
 342                 err = register_netdev(dev);
 343                 if (err)
 344                         ibmtr_cleanup_card(dev);
 345         }
 346         return err;
 347 }
 348
 349 /****************************************************************************
 350  *      ibmtr_probe():  Routine specified in the network device structure
 351  *      to probe for an IBM Token Ring Adapter.  Routine outline:
 352  *      I.    Interrogate hardware to determine if an adapter exists
 353  *            and what the speeds and feeds are
 354  *      II.   Setup data structures to control execution based upon
 355  *            adapter characteristics.
 356  *
 357  *      We expect ibmtr_probe to be called once for each device entry
 358  *      which references it.
 359  ****************************************************************************/
 360
 361 static int ibmtr_probe(struct net_device *dev)
 362 {
 363         int i;
 364         int base_addr = dev->base_addr;
 365
 366         if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
 367                 return -ENXIO;
 368         if (base_addr > 0x1ff) { /* Check a single specified location.  */
 369                 if (!ibmtr_probe1(dev, base_addr)) return 0;
 370                 return -ENODEV;
 371         }
 372         find_turbo_adapters(ibmtr_portlist);
 373         for (i = 0; ibmtr_portlist[i]; i++) {
 374                 int ioaddr = ibmtr_portlist[i];
 375
 376                 if (!ibmtr_probe1(dev, ioaddr)) return 0;
 377         }
 378         return -ENODEV;
 379 }
 380
 381 /*****************************************************************************/
 382
 383 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
 384 {
 385
 386         unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
 387         void __iomem * t_mmio = NULL;
 388         struct tok_info *ti = dev->priv;
 389         void __iomem *cd_chanid;
 390         unsigned char *tchanid, ctemp;
 391 #ifndef PCMCIA
 392         unsigned char t_irq=0;
 393         unsigned long timeout;
 394         static int version_printed;
 395 #endif
 396
 397         /*    Query the adapter PIO base port which will return
 398          *    indication of where MMIO was placed. We also have a
 399          *    coded interrupt number.
 400          */
 401         segment = inb(PIOaddr);
 402         if (segment < 0x40 || segment > 0xe0) {
 403                 /* Out of range values so we'll assume non-existent IO device
 404                  * but this is not necessarily a problem, esp if a turbo
 405                  * adapter is being used.  */
 406 #if IBMTR_DEBUG_MESSAGES
 407                 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
 408                         "Hardware Problem?\n",PIOaddr,segment);
 409 #endif
 410                 return -ENODEV;
 411         }
 412         /*
 413          *    Compute the linear base address of the MMIO area
 414          *    as LINUX doesn't care about segments
 415          */
 416         t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
 417         if (!t_mmio) {
 418                 DPRINTK("Cannot remap mmiobase memory area") ;
 419                 return -ENODEV ;
 420         }
 421         intr = segment & 0x03;  /* low bits is coded interrupt # */
 422         if (ibmtr_debug_trace & TRC_INIT)
 423                 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
 424                                 , PIOaddr, (int) segment, t_mmio, (int) intr);
 425
 426         /*
 427          *    Now we will compare expected 'channelid' strings with
 428          *    what we is there to learn of ISA/MCA or not TR card
 429          */
 430 #ifdef PCMCIA
 431         iounmap(t_mmio);
 432         t_mmio = ti->mmio;      /*BMS to get virtual address */
 433         irq = ti->irq;          /*BMS to display the irq!   */
 434 #endif
 435         cd_chanid = (CHANNEL_ID + t_mmio);      /* for efficiency */
 436         tchanid = pcchannelid;
 437         cardpresent = TR_ISA;   /* try ISA */
 438
 439         /*    Suboptimize knowing first byte different */
 440         ctemp = readb(cd_chanid) & 0x0f;
 441         if (ctemp != *tchanid) {        /* NOT ISA card, try MCA */
 442                 tchanid = mcchannelid;
 443                 cardpresent = TR_MCA;
 444                 if (ctemp != *tchanid)  /* Neither ISA nor MCA */
 445                         cardpresent = NOTOK;
 446         }
 447         if (cardpresent != NOTOK) {
 448                 /*       Know presumed type, try rest of ID */
 449                 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
 450                         if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
 451                         /* match failed, not TR card */
 452                         cardpresent = NOTOK;
 453                         break;
 454                 }
 455         }
 456         /*
 457          *    If we have an ISA board check for the ISA P&P version,
 458          *    as it has different IRQ settings
 459          */
 460         if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
 461                 cardpresent = TR_ISAPNP;
 462         if (cardpresent == NOTOK) {     /* "channel_id" did not match, report */
 463                 if (!(ibmtr_debug_trace & TRC_INIT)) {
 464 #ifndef PCMCIA
 465                         iounmap(t_mmio);
 466 #endif
 467                         return -ENODEV;
 468                 }
 469                 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
 470                                                                 PIOaddr);
 471                 DPRINTK("Expected for ISA: ");
 472                 PrtChanID(pcchannelid, 1);
 473                 DPRINTK("           found: ");
 474 /* BMS Note that this can be misleading, when hardware is flaky, because you
 475    are reading it a second time here. So with my flaky hardware, I'll see my-
 476    self in this block, with the HW ID matching the ISA ID exactly! */
 477                 HWPrtChanID(cd_chanid, 2);
 478                 DPRINTK("Expected for MCA: ");
 479                 PrtChanID(mcchannelid, 1);
 480         }
 481         /* Now, setup some of the pl0 buffers for this driver.. */
 482         /* If called from PCMCIA, it is already set up, so no need to
 483            waste the memory, just use the existing structure */
 484 #ifndef PCMCIA
 485         ti->mmio = t_mmio;
 486         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
 487                 if (turbo_io[i] != PIOaddr)
 488                         continue;
 489 #if IBMTR_DEBUG_MESSAGES
 490                 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
 491                        PIOaddr);
 492 #endif
 493                 ti->turbo = 1;
 494                 t_irq = turbo_irq[i];
 495         }
 496 #endif /* !PCMCIA */
 497         ti->readlog_pending = 0;
 498         init_waitqueue_head(&ti->wait_for_reset);
 499
 500         /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
 501          * depending which card is inserted.    */
 502
 503 #ifndef PCMCIA
 504         switch (cardpresent) {
 505         case TR_ISA:
 506                 if (intr == 0) irq = 9; /* irq2 really is irq9 */
 507                 if (intr == 1) irq = 3;
 508                 if (intr == 2) irq = 6;
 509                 if (intr == 3) irq = 7;
 510                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
 511                 break;
 512         case TR_MCA:
 513                 if (intr == 0) irq = 9;
 514                 if (intr == 1) irq = 3;
 515                 if (intr == 2) irq = 10;
 516                 if (intr == 3) irq = 11;
 517                 ti->global_int_enable = 0;
 518                 ti->adapter_int_enable = 0;
 519                 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
 520                 break;
 521         case TR_ISAPNP:
 522                 if (!t_irq) {
 523                         if (intr == 0) irq = 9;
 524                         if (intr == 1) irq = 3;
 525                         if (intr == 2) irq = 10;
 526                         if (intr == 3) irq = 11;
 527                 } else
 528                         irq=t_irq;
 529                 timeout = jiffies + TR_SPIN_INTERVAL;
 530                 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
 531                         if (!time_after(jiffies, timeout)) continue;
 532                         DPRINTK( "Hardware timeout during initialization.\n");
 533                         iounmap(t_mmio);
 534                         kfree(ti);
 535                         return -ENODEV;
 536                 }
 537                 ti->sram_phys =
 538                      ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
 539                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
 540                 break;
 541         } /*end switch (cardpresent) */
 542 #endif  /*not PCMCIA */
 543
 544         if (ibmtr_debug_trace & TRC_INIT) {     /* just report int */
 545                 DPRINTK("irq=%d", irq);
 546                 printk(", sram_phys=0x%x", ti->sram_phys);
 547                 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
 548                         DPRINTK(", ti->mmio=%p", ti->mmio);
 549                         printk(", segment=%02X", segment);
 550                 }
 551                 printk(".\n");
 552         }
 553
 554         /* Get hw address of token ring card */
 555         j = 0;
 556         for (i = 0; i < 0x18; i = i + 2) {
 557                 /* technical reference states to do this */
 558                 temp = readb(ti->mmio + AIP + i) & 0x0f;
 559                 ti->hw_address[j] = temp;
 560                 if (j & 1)
 561                         dev->dev_addr[(j / 2)] =
 562                                 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
 563                 ++j;
 564         }
 565         /* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
 566         ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
 567
 568         /* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
 569         ti->data_rate = readb(ti->mmio + AIPDATARATE);
 570
 571         /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
 572         ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
 573
 574         /* How much shared RAM is on adapter ? */
 575         if (ti->turbo) {
 576                 ti->avail_shared_ram=127;
 577         } else {
 578                 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
 579         }
 580         /* We need to set or do a bunch of work here based on previous results*/
 581         /* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
 582         ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
 583
 584         /* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
 585         switch (readb(ti->mmio + AIP4MBDHB)) {
 586         case 0xe: ti->dhb_size4mb = 4096; break;
 587         case 0xd: ti->dhb_size4mb = 4464; break;
 588         default:  ti->dhb_size4mb = 2048; break;
 589         }
 590
 591         /* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
 592         switch (readb(ti->mmio + AIP16MBDHB)) {
 593         case 0xe: ti->dhb_size16mb = 4096; break;
 594         case 0xd: ti->dhb_size16mb = 8192; break;
 595         case 0xc: ti->dhb_size16mb = 16384; break;
 596         case 0xb: ti->dhb_size16mb = 17960; break;
 597         default:  ti->dhb_size16mb = 2048; break;
 598         }
 599
 600         /*    We must figure out how much shared memory space this adapter
 601          *    will occupy so that if there are two adapters we can fit both
 602          *    in.  Given a choice, we will limit this adapter to 32K.  The
 603          *    maximum space will will use for two adapters is 64K so if the
 604          *    adapter we are working on demands 64K (it also doesn't support
 605          *    paging), then only one adapter can be supported.
 606          */
 607
 608         /*
 609          *    determine how much of total RAM is mapped into PC space
 610          */
 611         ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
 612             1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
 613         ti->page_mask = 0;
 614         if (ti->turbo)  ti->page_mask=0xf0;
 615         else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
 616         else {
 617 #ifdef ENABLE_PAGING
 618                 unsigned char pg_size = 0;
 619                 /* BMS:   page size: PCMCIA, use configuration register;
 620                    ISAPNP, use LANAIDC config tool from www.ibm.com  */
 621                 switch (ti->shared_ram_paging) {
 622                 case 0xf:
 623                         break;
 624                 case 0xe:
 625                         ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
 626                         pg_size = 32;   /* 16KB page size */
 627                         break;
 628                 case 0xd:
 629                         ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
 630                         pg_size = 64;   /* 32KB page size */
 631                         break;
 632                 case 0xc:
 633                         switch (ti->mapped_ram_size) {
 634                         case 32:
 635                                 ti->page_mask = 0xc0;
 636                                 pg_size = 32;
 637                                 break;
 638                         case 64:
 639                                 ti->page_mask = 0x80;
 640                                 pg_size = 64;
 641                                 break;
 642                         }
 643                         break;
 644                 default:
 645                         DPRINTK("Unknown shared ram paging info %01X\n",
 646                                                         ti->shared_ram_paging);
 647                         iounmap(t_mmio);
 648                         kfree(ti);
 649                         return -ENODEV;
 650                         break;
 651                 } /*end switch shared_ram_paging */
 652
 653                 if (ibmtr_debug_trace & TRC_INIT)
 654                         DPRINTK("Shared RAM paging code: %02X, "
 655                                 "mapped RAM size: %dK, shared RAM size: %dK, "
 656                                 "page mask: %02X\n:",
 657                                 ti->shared_ram_paging, ti->mapped_ram_size / 2,
 658                                 ti->avail_shared_ram / 2, ti->page_mask);
 659 #endif  /*ENABLE_PAGING */
 660         }
 661
 662 #ifndef PCMCIA
 663         /* finish figuring the shared RAM address */
 664         if (cardpresent == TR_ISA) {
 665                 static __u32 ram_bndry_mask[] =
 666                         { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
 667                 __u32 new_base, rrr_32, chk_base, rbm;
 668
 669                 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
 670                 rbm = ram_bndry_mask[rrr_32];
 671                 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
 672                 chk_base = new_base + (ti->mapped_ram_size << 9);
 673                 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
 674                         DPRINTK("Shared RAM for this adapter (%05x) exceeds "
 675                         "driver limit (%05x), adapter not started.\n",
 676                         chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
 677                         iounmap(t_mmio);
 678                         kfree(ti);
 679                         return -ENODEV;
 680                 } else { /* seems cool, record what we have figured out */
 681                         ti->sram_base = new_base >> 12;
 682                         ibmtr_mem_base = chk_base;
 683                 }
 684         }
 685         else  ti->sram_base = ti->sram_phys >> 12;
 686
 687         /* The PCMCIA has already got the interrupt line and the io port,
 688            so no chance of anybody else getting it - MLP */
 689         if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
 690                 DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
 691                                         irq);
 692                 iounmap(t_mmio);
 693                 kfree(ti);
 694                 return -ENODEV;
 695         }
 696         /*?? Now, allocate some of the PIO PORTs for this driver.. */
 697         /* record PIOaddr range as busy */
 698         if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
 699                 DPRINTK("Could not grab PIO range. Halting driver.\n");
 700                 free_irq(dev->irq, dev);
 701                 iounmap(t_mmio);
 702                 kfree(ti);
 703                 return -EBUSY;
 704         }
 705
 706         if (!version_printed++) {
 707                 printk(version);
 708         }
 709 #endif /* !PCMCIA */
 710         DPRINTK("%s %s found\n",
 711                 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
 712         DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
 713                         irq, PIOaddr, ti->mapped_ram_size / 2);
 714         DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
 715                 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 716                 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 717         if (ti->page_mask)
 718                 DPRINTK("Shared RAM paging enabled. "
 719                         "Page size: %uK Shared Ram size %dK\n",
 720                         ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
 721         else
 722                 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
 723                                                                 ti->page_mask);
 724
 725         /* Calculate the maximum DHB we can use */
 726         /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
 727             1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
 728             2. user has configured adapter for less than avail_shared_ram
 729                but is not using paging (she should use paging, I believe)
 730         */
 731         if (!ti->page_mask) {
 732                 ti->avail_shared_ram=
 733                                 min(ti->mapped_ram_size,ti->avail_shared_ram);
 734         }
 735
 736         switch (ti->avail_shared_ram) {
 737         case 16:                /* 8KB shared RAM */
 738                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
 739                 ti->rbuf_len4 = 1032;
 740                 ti->rbuf_cnt4=2;
 741                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
 742                 ti->rbuf_len16 = 1032;
 743                 ti->rbuf_cnt16=2;
 744                 break;
 745         case 32:                /* 16KB shared RAM */
 746                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 747                 ti->rbuf_len4 = 1032;
 748                 ti->rbuf_cnt4=4;
 749                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
 750                 ti->rbuf_len16 = 1032;  /*1024 usable */
 751                 ti->rbuf_cnt16=4;
 752                 break;
 753         case 64:                /* 32KB shared RAM */
 754                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 755                 ti->rbuf_len4 = 1032;
 756                 ti->rbuf_cnt4=6;
 757                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
 758                 ti->rbuf_len16 = 1032;
 759                 ti->rbuf_cnt16=6;
 760                 break;
 761         case 127:               /* 63.5KB shared RAM */
 762                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 763                 ti->rbuf_len4 = 1032;
 764                 ti->rbuf_cnt4=6;
 765                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
 766                 ti->rbuf_len16 = 1032;
 767                 ti->rbuf_cnt16=16;
 768                 break;
 769         case 128:               /* 64KB   shared RAM */
 770                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 771                 ti->rbuf_len4 = 1032;
 772                 ti->rbuf_cnt4=6;
 773                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
 774                 ti->rbuf_len16 = 1032;
 775                 ti->rbuf_cnt16=16;
 776                 break;
 777         default:
 778                 ti->dhb_size4mb = 2048;
 779                 ti->rbuf_len4 = 1032;
 780                 ti->rbuf_cnt4=2;
 781                 ti->dhb_size16mb = 2048;
 782                 ti->rbuf_len16 = 1032;
 783                 ti->rbuf_cnt16=2;
 784                 break;
 785         }
 786         /* this formula is not smart enough for the paging case
 787         ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
 788                         ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
 789                         DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
 790                         SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
 791         */
 792         ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
 793         ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
 794         /*BMS assuming 18 bytes of Routing Information (usually works) */
 795         DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
 796                                                      ti->maxmtu16, ti->maxmtu4);
 797
 798         dev->base_addr = PIOaddr;       /* set the value for device */
 799         dev->mem_start = ti->sram_base << 12;
 800         dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
 801         trdev_init(dev);
 802         return 0;   /* Return 0 to indicate we have found a Token Ring card. */
 803 }                               /*ibmtr_probe1() */
 804
 805 /*****************************************************************************/
 806
 807 /* query the adapter for the size of shared RAM  */
 808 /* the function returns the RAM size in units of 512 bytes */
 809
 810 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
 811 {
 812         unsigned char avail_sram_code;
 813         static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
 814         /* Adapter gives
 815            'F' -- use RRR bits 3,2
 816            'E' -- 8kb   'D' -- 16kb
 817            'C' -- 32kb  'A' -- 64KB
 818            'B' - 64KB less 512 bytes at top
 819            (WARNING ... must zero top bytes in INIT */
 820
 821         avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
 822         if (avail_sram_code) return size_code[avail_sram_code];
 823         else            /* for code 'F', must compute size from RRR(3,2) bits */
 824                 return 1 <<
 825                  ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
 826 }
 827
 828 /*****************************************************************************/
 829
 830 static int __devinit trdev_init(struct net_device *dev)
 831 {
 832         struct tok_info *ti = (struct tok_info *) dev->priv;
 833
 834         SET_PAGE(ti->srb_page);
 835         ti->open_failure = NO    ;
 836         dev->open = tok_open;
 837         dev->stop = tok_close;
 838         dev->hard_start_xmit = tok_send_packet;
 839         dev->get_stats = tok_get_stats;
 840         dev->set_multicast_list = tok_set_multicast_list;
 841         dev->change_mtu = ibmtr_change_mtu;
 842
 843         return 0;
 844 }
 845
 846 /*****************************************************************************/
 847
 848 static int tok_init_card(struct net_device *dev)
 849 {
 850         struct tok_info *ti;
 851         short PIOaddr;
 852         unsigned long i;
 853
 854         PIOaddr = dev->base_addr;
 855         ti = (struct tok_info *) dev->priv;
 856         /* Special processing for first interrupt after reset */
 857         ti->do_tok_int = FIRST_INT;
 858         /* Reset adapter */
 859         writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
 860         outb(0, PIOaddr + ADAPTRESET);
 861
 862         schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
 863
 864         outb(0, PIOaddr + ADAPTRESETREL);
 865 #ifdef ENABLE_PAGING
 866         if (ti->page_mask)
 867                 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
 868 #endif
 869         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 870         i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
 871         return i? 0 : -EAGAIN;
 872 }
 873
 874 /*****************************************************************************/
 875 static int tok_open(struct net_device *dev)
 876 {
 877         struct tok_info *ti = (struct tok_info *) dev->priv;
 878         int i;
 879
 880         /*the case we were left in a failure state during a previous open */
 881         if (ti->open_failure == YES) {
 882                 DPRINTK("Last time you were disconnected, how about now?\n");
 883                 printk("You can't insert with an ICS connector half-cocked.\n");
 884         }
 885
 886         ti->open_status  = CLOSED; /* CLOSED or OPEN      */
 887         ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
 888         ti->open_failure =     NO; /* NO     or YES       */
 889         ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
 890
 891         ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
 892         /* init the spinlock */
 893         spin_lock_init(&ti->lock);
 894         init_timer(&ti->tr_timer);
 895
 896         i = tok_init_card(dev);
 897         if (i) return i;
 898
 899         while (1){
 900                 tok_open_adapter((unsigned long) dev);
 901                 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
 902                 /* sig catch: estimate opening adapter takes more than .5 sec*/
 903                 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
 904                 if (i==0) break;
 905                 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
 906                         netif_start_queue(dev);
 907                         DPRINTK("Adapter is up and running\n");
 908                         return 0;
 909                 }
 910                 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
 911                                                         /* wait 30 seconds */
 912                 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
 913         }
 914         outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
 915         DPRINTK("TERMINATED via signal\n");     /*BMS useful */
 916         return -EAGAIN;
 917 }
 918
 919 /*****************************************************************************/
 920
 921 #define COMMAND_OFST             0
 922 #define OPEN_OPTIONS_OFST        8
 923 #define NUM_RCV_BUF_OFST        24
 924 #define RCV_BUF_LEN_OFST        26
 925 #define DHB_LENGTH_OFST         28
 926 #define NUM_DHB_OFST            30
 927 #define DLC_MAX_SAP_OFST        32
 928 #define DLC_MAX_STA_OFST        33
 929
 930 static void tok_open_adapter(unsigned long dev_addr)
 931 {
 932         struct net_device *dev = (struct net_device *) dev_addr;
 933         struct tok_info *ti;
 934         int i;
 935
 936         ti = (struct tok_info *) dev->priv;
 937         SET_PAGE(ti->init_srb_page);
 938         writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
 939         for (i = 0; i < sizeof(struct dir_open_adapter); i++)
 940                 writeb(0, ti->init_srb + i);
 941         writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
 942         writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
 943         if (ti->ring_speed == 16) {
 944                 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
 945                 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
 946                 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
 947         } else {
 948                 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
 949                 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
 950                 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
 951         }
 952         writeb(NUM_DHB,         /* always 2 */ ti->init_srb + NUM_DHB_OFST);
 953         writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
 954         writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
 955         ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
 956         ti->srb_page = ti->init_srb_page;
 957         DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
 958                 readb(ti->init_srb + NUM_DHB_OFST),
 959                 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
 960                 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
 961                 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
 962         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 963         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 964 }
 965
 966 /*****************************************************************************/
 967
 968 static void open_sap(unsigned char type, struct net_device *dev)
 969 {
 970         int i;
 971         struct tok_info *ti = (struct tok_info *) dev->priv;
 972
 973         SET_PAGE(ti->srb_page);
 974         for (i = 0; i < sizeof(struct dlc_open_sap); i++)
 975                 writeb(0, ti->srb + i);
 976
 977 #define MAX_I_FIELD_OFST        14
 978 #define SAP_VALUE_OFST          16
 979 #define SAP_OPTIONS_OFST        17
 980 #define STATION_COUNT_OFST      18
 981
 982         writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
 983         writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
 984         writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
 985         writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
 986         writeb(type, ti->srb + SAP_VALUE_OFST);
 987         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 988 }
 989
 990
 991 /*****************************************************************************/
 992
 993 static void tok_set_multicast_list(struct net_device *dev)
 994 {
 995         struct tok_info *ti = (struct tok_info *) dev->priv;
 996         struct dev_mc_list *mclist;
 997         unsigned char address[4];
 998
 999         int i;
1000
1001         /*BMS the next line is CRUCIAL or you may be sad when you */
1002         /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
1003         if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
1004         address[0] = address[1] = address[2] = address[3] = 0;
1005         mclist = dev->mc_list;
1006         for (i = 0; i < dev->mc_count; i++) {
1007                 address[0] |= mclist->dmi_addr[2];
1008                 address[1] |= mclist->dmi_addr[3];
1009                 address[2] |= mclist->dmi_addr[4];
1010                 address[3] |= mclist->dmi_addr[5];
1011                 mclist = mclist->next;
1012         }
1013         SET_PAGE(ti->srb_page);
1014         for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1015                 writeb(0, ti->srb + i);
1016
1017 #define FUNCT_ADDRESS_OFST 6
1018
1019         writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1020         for (i = 0; i < 4; i++)
1021                 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1022         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1023 #if TR_VERBOSE
1024         DPRINTK("Setting functional address: ");
1025         for (i=0;i<4;i++)  printk("%02X ", address[i]);
1026         printk("\n");
1027 #endif
1028 }
1029
1030 /*****************************************************************************/
1031
1032 #define STATION_ID_OFST 4
1033
1034 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1035 {
1036         struct tok_info *ti;
1037         unsigned long flags;
1038         ti = (struct tok_info *) dev->priv;
1039
1040         netif_stop_queue(dev);
1041
1042         /* lock against other CPUs */
1043         spin_lock_irqsave(&(ti->lock), flags);
1044
1045         /* Save skb; we'll need it when the adapter asks for the data */
1046         ti->current_skb = skb;
1047         SET_PAGE(ti->srb_page);
1048         writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1049         writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1050         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1051         spin_unlock_irqrestore(&(ti->lock), flags);
1052         dev->trans_start = jiffies;
1053         return 0;
1054 }
1055
1056 /*****************************************************************************/
1057
1058 static int tok_close(struct net_device *dev)
1059 {
1060         struct tok_info *ti = (struct tok_info *) dev->priv;
1061
1062         /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1063         /* unloading the module from memory, and then if a timer pops, ouch */
1064         del_timer_sync(&ti->tr_timer);
1065         outb(0, dev->base_addr + ADAPTRESET);
1066         ti->sram_phys |= 1;
1067         ti->open_status = CLOSED;
1068
1069         netif_stop_queue(dev);
1070         DPRINTK("Adapter is closed.\n");
1071         return 0;
1072 }
1073
1074 /*****************************************************************************/
1075
1076 #define RETCODE_OFST            2
1077 #define OPEN_ERROR_CODE_OFST    6
1078 #define ASB_ADDRESS_OFST        8
1079 #define SRB_ADDRESS_OFST        10
1080 #define ARB_ADDRESS_OFST        12
1081 #define SSB_ADDRESS_OFST        14
1082
1083 static char *printphase[]= {"Lobe media test","Physical insertion",
1084               "Address verification","Roll call poll","Request Parameters"};
1085 static char *printerror[]={"Function failure","Signal loss","Reserved",
1086                 "Frequency error","Timeout","Ring failure","Ring beaconing",
1087                 "Duplicate node address",
1088                 "Parameter request-retry count exceeded","Remove received",
1089                 "IMPL force received","Duplicate modifier",
1090                 "No monitor detected","Monitor contention failed for RPL"};
1091
1092 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1093 {
1094         if (ti->page_mask) {
1095                 *page = (index >> 8) & ti->page_mask;
1096                 index &= ~(ti->page_mask << 8);
1097         }
1098         return ti->sram_virt + index;
1099 }
1100
1101 static void dir_open_adapter (struct net_device *dev)
1102 {
1103         struct tok_info *ti = (struct tok_info *) dev->priv;
1104         unsigned char ret_code;
1105         __u16 err;
1106
1107         ti->srb = map_address(ti,
1108                 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1109                 &ti->srb_page);
1110         ti->ssb = map_address(ti,
1111                 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1112                 &ti->ssb_page);
1113         ti->arb = map_address(ti,
1114                 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1115                 &ti->arb_page);
1116         ti->asb = map_address(ti,
1117                 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1118                 &ti->asb_page);
1119         ti->current_skb = NULL;
1120         ret_code = readb(ti->init_srb + RETCODE_OFST);
1121         err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1122         if (!ret_code) {
1123                 ti->open_status = OPEN; /* TR adapter is now available */
1124                 if (ti->open_mode == AUTOMATIC) {
1125                         DPRINTK("Adapter reopened.\n");
1126                 }
1127                 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1128                 open_sap(EXTENDED_SAP, dev);
1129                 return;
1130         }
1131         ti->open_failure = YES;
1132         if (ret_code == 7){
1133                if (err == 0x24) {
1134                         if (!ti->auto_speedsave) {
1135                                 DPRINTK("Open failed: Adapter speed must match "
1136                                  "ring speed if Automatic Ring Speed Save is "
1137                                  "disabled.\n");
1138                                 ti->open_action = FAIL;
1139                         }else
1140                                 DPRINTK("Retrying open to adjust to "
1141                                         "ring speed, ");
1142                 } else if (err == 0x2d) {
1143                         DPRINTK("Physical Insertion: No Monitor Detected, ");
1144                         printk("retrying after %ds delay...\n",
1145                                         TR_RETRY_INTERVAL/HZ);
1146                 } else if (err == 0x11) {
1147                         DPRINTK("Lobe Media Function Failure (0x11), ");
1148                         printk(" retrying after %ds delay...\n",
1149                                         TR_RETRY_INTERVAL/HZ);
1150                 } else {
1151                         char **prphase = printphase;
1152                         char **prerror = printerror;
1153                         DPRINTK("TR Adapter misc open failure, error code = ");
1154                         printk("0x%x, Phase: %s, Error: %s\n",
1155                                 err, prphase[err/16 -1], prerror[err%16 -1]);
1156                         printk(" retrying after %ds delay...\n",
1157                                         TR_RETRY_INTERVAL/HZ);
1158                 }
1159         } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1160         if (ti->open_action != FAIL) {
1161                 if (ti->open_mode==AUTOMATIC){
1162                         ti->open_action = REOPEN;
1163                         ibmtr_reset_timer(&(ti->tr_timer), dev);
1164                         return;
1165                 }
1166                 wake_up(&ti->wait_for_reset);
1167                 return;
1168         }
1169         DPRINTK("FAILURE, CAPUT\n");
1170 }
1171
1172 /******************************************************************************/
1173
1174 static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1175 {
1176         unsigned char status;
1177         /*  unsigned char status_even ; */
1178         struct tok_info *ti;
1179         struct net_device *dev;
1180 #ifdef ENABLE_PAGING
1181         unsigned char save_srpr;
1182 #endif
1183
1184         dev = dev_id;
1185 #if TR_VERBOSE
1186         DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
1187 #endif
1188         ti = (struct tok_info *) dev->priv;
1189         if (ti->sram_phys & 1)
1190                 return IRQ_NONE;         /* PCMCIA card extraction flag */
1191         spin_lock(&(ti->lock));
1192 #ifdef ENABLE_PAGING
1193         save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1194 #endif
1195
1196         /* Disable interrupts till processing is finished */
1197         writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1198
1199         /* Reset interrupt for ISA boards */
1200         if (ti->adapter_int_enable)
1201                 outb(0, ti->adapter_int_enable);
1202         else /* used for PCMCIA cards */
1203                 outb(0, ti->global_int_enable);
1204         if (ti->do_tok_int == FIRST_INT){
1205                 initial_tok_int(dev);
1206 #ifdef ENABLE_PAGING
1207                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1208 #endif
1209                 spin_unlock(&(ti->lock));
1210                 return IRQ_HANDLED;
1211         }
1212         /*  Begin interrupt handler HERE inline to avoid the extra
1213             levels of logic and call depth for the original solution. */
1214         status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1215         /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1216         /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1217         /*BMS                                       status,status_even);      */
1218
1219         if (status & ADAP_CHK_INT) {
1220                 int i;
1221                 void __iomem *check_reason;
1222                 __u8 check_reason_page = 0;
1223                 check_reason = map_address(ti,
1224                         ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1225                         &check_reason_page);
1226                 SET_PAGE(check_reason_page);
1227
1228                 DPRINTK("Adapter check interrupt\n");
1229                 DPRINTK("8 reason bytes follow: ");
1230                 for (i = 0; i < 8; i++, check_reason++)
1231                         printk("%02X ", (int) readb(check_reason));
1232                 printk("\n");
1233                 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1234                 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1235                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1236                 ti->open_status = CLOSED;
1237                 ti->sap_status  = CLOSED;
1238                 ti->open_mode   = AUTOMATIC;
1239                 netif_carrier_off(dev);
1240                 netif_stop_queue(dev);
1241                 ti->open_action = RESTART;
1242                 outb(0, dev->base_addr + ADAPTRESET);
1243                 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1244                 spin_unlock(&(ti->lock));
1245                 return IRQ_HANDLED;
1246         }
1247         if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1248                 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1249                 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1250                         (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1251                 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1252                         ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1253                 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1254                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1255                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1256 #ifdef ENABLE_PAGING
1257                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1258 #endif
1259                 spin_unlock(&(ti->lock));
1260                 return IRQ_HANDLED;
1261         }
1262         if (status & SRB_RESP_INT) {    /* SRB response */
1263                 SET_PAGE(ti->srb_page);
1264 #if TR_VERBOSE
1265                 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1266                                 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1267 #endif
1268                 switch (readb(ti->srb)) {       /* SRB command check */
1269                 case XMIT_DIR_FRAME:{
1270                         unsigned char xmit_ret_code;
1271                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1272                         if (xmit_ret_code == 0xff) break;
1273                         DPRINTK("error on xmit_dir_frame request: %02X\n",
1274                                                                 xmit_ret_code);
1275                         if (ti->current_skb) {
1276                                 dev_kfree_skb_irq(ti->current_skb);
1277                                 ti->current_skb = NULL;
1278                         }
1279                         /*dev->tbusy = 0;*/
1280                         netif_wake_queue(dev);
1281                         if (ti->readlog_pending)
1282                                 ibmtr_readlog(dev);
1283                         break;
1284                 }
1285                 case XMIT_UI_FRAME:{
1286                         unsigned char xmit_ret_code;
1287
1288                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1289                         if (xmit_ret_code == 0xff) break;
1290                         DPRINTK("error on xmit_ui_frame request: %02X\n",
1291                                                                 xmit_ret_code);
1292                         if (ti->current_skb) {
1293                                 dev_kfree_skb_irq(ti->current_skb);
1294                                 ti->current_skb = NULL;
1295                         }
1296                         netif_wake_queue(dev);
1297                         if (ti->readlog_pending)
1298                                 ibmtr_readlog(dev);
1299                         break;
1300                 }
1301                 case DIR_OPEN_ADAPTER:
1302                         dir_open_adapter(dev);
1303                         break;
1304                 case DLC_OPEN_SAP:
1305                         if (readb(ti->srb + RETCODE_OFST)) {
1306                                 DPRINTK("open_sap failed: ret_code = %02X, "
1307                                         "retrying\n",
1308                                         (int) readb(ti->srb + RETCODE_OFST));
1309                                 ti->open_action = REOPEN;
1310                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1311                                 break;
1312                         }
1313                         ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1314                         ti->sap_status = OPEN;/* TR adapter is now available */
1315                         if (ti->open_mode==MANUAL){
1316                                 wake_up(&ti->wait_for_reset);
1317                                 break;
1318                         }
1319                         netif_wake_queue(dev);
1320                         netif_carrier_on(dev);
1321                         break;
1322                 case DIR_INTERRUPT:
1323                 case DIR_MOD_OPEN_PARAMS:
1324                 case DIR_SET_GRP_ADDR:
1325                 case DIR_SET_FUNC_ADDR:
1326                 case DLC_CLOSE_SAP:
1327                         if (readb(ti->srb + RETCODE_OFST))
1328                                 DPRINTK("error on %02X: %02X\n",
1329                                         (int) readb(ti->srb + COMMAND_OFST),
1330                                         (int) readb(ti->srb + RETCODE_OFST));
1331                         break;
1332                 case DIR_READ_LOG:
1333                         if (readb(ti->srb + RETCODE_OFST)){
1334                                 DPRINTK("error on dir_read_log: %02X\n",
1335                                         (int) readb(ti->srb + RETCODE_OFST));
1336                                 netif_wake_queue(dev);
1337                                 break;
1338                         }
1339 #if IBMTR_DEBUG_MESSAGES
1340
1341 #define LINE_ERRORS_OFST                 0
1342 #define INTERNAL_ERRORS_OFST             1
1343 #define BURST_ERRORS_OFST                2
1344 #define AC_ERRORS_OFST                   3
1345 #define ABORT_DELIMITERS_OFST            4
1346 #define LOST_FRAMES_OFST                 6
1347 #define RECV_CONGEST_COUNT_OFST          7
1348 #define FRAME_COPIED_ERRORS_OFST         8
1349 #define FREQUENCY_ERRORS_OFST            9
1350 #define TOKEN_ERRORS_OFST               10
1351
1352                         DPRINTK("Line errors %02X, Internal errors %02X, "
1353                         "Burst errors %02X\n" "A/C errors %02X, "
1354                         "Abort delimiters %02X, Lost frames %02X\n"
1355                         "Receive congestion count %02X, "
1356                         "Frame copied errors %02X\nFrequency errors %02X, "
1357                         "Token errors %02X\n",
1358                         (int) readb(ti->srb + LINE_ERRORS_OFST),
1359                         (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1360                         (int) readb(ti->srb + BURST_ERRORS_OFST),
1361                         (int) readb(ti->srb + AC_ERRORS_OFST),
1362                         (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1363                         (int) readb(ti->srb + LOST_FRAMES_OFST),
1364                         (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1365                         (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1366                         (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1367                         (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1368 #endif
1369                         netif_wake_queue(dev);
1370                         break;
1371                 default:
1372                         DPRINTK("Unknown command %02X encountered\n",
1373                                                 (int) readb(ti->srb));
1374                 }       /* end switch SRB command check */
1375                 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1376         }       /* if SRB response */
1377         if (status & ASB_FREE_INT) {    /* ASB response */
1378                 SET_PAGE(ti->asb_page);
1379 #if TR_VERBOSE
1380                 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1381 #endif
1382
1383                 switch (readb(ti->asb)) {       /* ASB command check */
1384                 case REC_DATA:
1385                 case XMIT_UI_FRAME:
1386                 case XMIT_DIR_FRAME:
1387                         break;
1388                 default:
1389                         DPRINTK("unknown command in asb %02X\n",
1390                                                 (int) readb(ti->asb));
1391                 }       /* switch ASB command check */
1392                 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1393                         DPRINTK("ASB error %02X in cmd %02X\n",
1394                                 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1395                 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1396         }       /* if ASB response */
1397
1398 #define STATUS_OFST             6
1399 #define NETW_STATUS_OFST        6
1400
1401         if (status & ARB_CMD_INT) {     /* ARB response */
1402                 SET_PAGE(ti->arb_page);
1403 #if TR_VERBOSE
1404                 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1405 #endif
1406
1407                 switch (readb(ti->arb)) {       /* ARB command check */
1408                 case DLC_STATUS:
1409                         DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1410                                 ntohs(readw(ti->arb + STATUS_OFST)),
1411                                 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1412                         break;
1413                 case REC_DATA:
1414                         tr_rx(dev);
1415                         break;
1416                 case RING_STAT_CHANGE:{
1417                         unsigned short ring_status;
1418                         ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1419                         if (ibmtr_debug_trace & TRC_INIT)
1420                                 DPRINTK("Ring Status Change...(0x%x)\n",
1421                                                                 ring_status);
1422                         if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1423                                 netif_stop_queue(dev);
1424                                 netif_carrier_off(dev);
1425                                 DPRINTK("Remove received, or Auto-removal error"
1426                                         ", or Lobe fault\n");
1427                                 DPRINTK("We'll try to reopen the closed adapter"
1428                                         " after a %d second delay.\n",
1429                                                 TR_RETRY_INTERVAL/HZ);
1430                                 /*I was confused: I saw the TR reopening but */
1431                                 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1432                                 /*but adapter not in the ring, the TR will   */
1433                                 /* open, and then soon close and come here.  */
1434                                 ti->open_mode = AUTOMATIC;
1435                                 ti->open_status = CLOSED; /*12/2000 BMS*/
1436                                 ti->open_action = REOPEN;
1437                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1438                         } else if (ring_status & LOG_OVERFLOW) {
1439                                 if(netif_queue_stopped(dev))
1440                                         ti->readlog_pending = 1;
1441                                 else
1442                                         ibmtr_readlog(dev);
1443                         }
1444                         break;
1445                 }
1446                 case XMIT_DATA_REQ:
1447                         tr_tx(dev);
1448                         break;
1449                 default:
1450                         DPRINTK("Unknown command %02X in arb\n",
1451                                                 (int) readb(ti->arb));
1452                         break;
1453                 }       /* switch ARB command check */
1454                 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1455                 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1456         }       /* if ARB response */
1457         if (status & SSB_RESP_INT) {    /* SSB response */
1458                 unsigned char retcode;
1459                 SET_PAGE(ti->ssb_page);
1460 #if TR_VERBOSE
1461                 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1462                                 readb(ti->ssb), readb(ti->ssb + 2));
1463 #endif
1464
1465                 switch (readb(ti->ssb)) {       /* SSB command check */
1466                 case XMIT_DIR_FRAME:
1467                 case XMIT_UI_FRAME:
1468                         retcode = readb(ti->ssb + 2);
1469                         if (retcode && (retcode != 0x22))/* checks ret_code */
1470                                 DPRINTK("xmit ret_code: %02X xmit error code: "
1471                                         "%02X\n",
1472                                         (int)retcode, (int)readb(ti->ssb + 6));
1473                         else
1474                                 ti->tr_stats.tx_packets++;
1475                         break;
1476                 case XMIT_XID_CMD:
1477                         DPRINTK("xmit xid ret_code: %02X\n",
1478                                                 (int) readb(ti->ssb + 2));
1479                 default:
1480                         DPRINTK("Unknown command %02X in ssb\n",
1481                                                 (int) readb(ti->ssb));
1482                 }       /* SSB command check */
1483                 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1484                 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1485         }       /* if SSB response */
1486 #ifdef ENABLE_PAGING
1487         writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1488 #endif
1489         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1490         spin_unlock(&(ti->lock));
1491         return IRQ_HANDLED;
1492 }                               /*tok_interrupt */
1493
1494 /*****************************************************************************/
1495
1496 #define INIT_STATUS_OFST        1
1497 #define INIT_STATUS_2_OFST      2
1498 #define ENCODED_ADDRESS_OFST    8
1499
1500 static void initial_tok_int(struct net_device *dev)
1501 {
1502
1503         __u32 encoded_addr, hw_encoded_addr;
1504         struct tok_info *ti;
1505         unsigned char init_status; /*BMS 12/2000*/
1506
1507         ti = (struct tok_info *) dev->priv;
1508
1509         ti->do_tok_int = NOT_FIRST;
1510
1511         /* we assign the shared-ram address for ISA devices */
1512         writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1513 #ifndef PCMCIA
1514         ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1515 #endif
1516         ti->init_srb = map_address(ti,
1517                 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1518                 &ti->init_srb_page);
1519         if (ti->page_mask && ti->avail_shared_ram == 127) {
1520                 void __iomem *last_512;
1521                 __u8 last_512_page=0;
1522                 int i;
1523                 last_512 = map_address(ti, 0xfe00, &last_512_page);
1524                 /* initialize high section of ram (if necessary) */
1525                 SET_PAGE(last_512_page);
1526                 for (i = 0; i < 512; i++)
1527                         writeb(0, last_512 + i);
1528         }
1529         SET_PAGE(ti->init_srb_page);
1530
1531 #if TR_VERBOSE
1532         {
1533         int i;
1534
1535         DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1536         DPRINTK("init_srb(%p):", ti->init_srb );
1537         for (i = 0; i < 20; i++)
1538                 printk("%02X ", (int) readb(ti->init_srb + i));
1539         printk("\n");
1540         }
1541 #endif
1542
1543         hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1544         encoded_addr = ntohs(hw_encoded_addr);
1545         init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1546         readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1547         /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1548         ti->ring_speed = init_status & 0x01 ? 16 : 4;
1549         DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1550                                 ti->ring_speed, (unsigned int)dev->mem_start);
1551         ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
1552
1553         if (ti->open_mode == MANUAL)    wake_up(&ti->wait_for_reset);
1554         else                            tok_open_adapter((unsigned long)dev);
1555
1556 } /*initial_tok_int() */
1557
1558 /*****************************************************************************/
1559
1560 #define CMD_CORRELATE_OFST      1
1561 #define DHB_ADDRESS_OFST        6
1562
1563 #define FRAME_LENGTH_OFST       6
1564 #define HEADER_LENGTH_OFST      8
1565 #define RSAP_VALUE_OFST         9
1566
1567 static void tr_tx(struct net_device *dev)
1568 {
1569         struct tok_info *ti = (struct tok_info *) dev->priv;
1570         struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1571         unsigned int hdr_len;
1572         __u32 dhb=0,dhb_base;
1573         void __iomem *dhbuf = NULL;
1574         unsigned char xmit_command;
1575         int i,dhb_len=0x4000,src_len,src_offset;
1576         struct trllc *llc;
1577         struct srb_xmit xsrb;
1578         __u8 dhb_page = 0;
1579         __u8 llc_ssap;
1580
1581         SET_PAGE(ti->asb_page);
1582
1583         if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1584
1585         /* in providing the transmit interrupts, is telling us it is ready for
1586            data and providing a shared memory address for us to stuff with data.
1587            Here we compute the effective address where we will place data.
1588         */
1589         SET_PAGE(ti->arb_page);
1590         dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1591         if (ti->page_mask) {
1592                 dhb_page = (dhb_base >> 8) & ti->page_mask;
1593                 dhb=dhb_base & ~(ti->page_mask << 8);
1594         }
1595         dhbuf = ti->sram_virt + dhb;
1596
1597         /* Figure out the size of the 802.5 header */
1598         if (!(trhdr->saddr[0] & 0x80))  /* RIF present? */
1599                 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1600         else
1601                 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1602                     + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1603
1604         llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1605
1606         llc_ssap = llc->ssap;
1607         SET_PAGE(ti->srb_page);
1608         memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1609         SET_PAGE(ti->asb_page);
1610         xmit_command = xsrb.command;
1611
1612         writeb(xmit_command, ti->asb + COMMAND_OFST);
1613         writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1614         writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1615         writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1616         writeb(0, ti->asb + RETCODE_OFST);
1617         if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1618                 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1619                 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1620                 SET_PAGE(dhb_page);
1621                 writeb(AC, dhbuf);
1622                 writeb(LLC_FRAME, dhbuf + 1);
1623                 for (i = 0; i < TR_ALEN; i++)
1624                         writeb((int) 0x0FF, dhbuf + i + 2);
1625                 for (i = 0; i < TR_ALEN; i++)
1626                         writeb(0, dhbuf + i + TR_ALEN + 2);
1627                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1628                 return;
1629         }
1630         /*
1631          *    the token ring packet is copied from sk_buff to the adapter
1632          *    buffer identified in the command data received with the interrupt.
1633          */
1634         writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1635         writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1636         src_len=ti->current_skb->len;
1637         src_offset=0;
1638         dhb=dhb_base;
1639         while(1) {
1640                 if (ti->page_mask) {
1641                         dhb_page=(dhb >> 8) & ti->page_mask;
1642                         dhb=dhb & ~(ti->page_mask << 8);
1643                         dhb_len=0x4000-dhb; /* remaining size of this page */
1644                 }
1645                 dhbuf = ti->sram_virt + dhb;
1646                 SET_PAGE(dhb_page);
1647                 if (src_len > dhb_len) {
1648                         memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1649                                         dhb_len);
1650                         src_len -= dhb_len;
1651                         src_offset += dhb_len;
1652                         dhb_base+=dhb_len;
1653                         dhb=dhb_base;
1654                         continue;
1655                 }
1656                 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1657                 break;
1658         }
1659         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1660         ti->tr_stats.tx_bytes += ti->current_skb->len;
1661         dev_kfree_skb_irq(ti->current_skb);
1662         ti->current_skb = NULL;
1663         netif_wake_queue(dev);
1664         if (ti->readlog_pending)
1665                 ibmtr_readlog(dev);
1666 }                               /*tr_tx */
1667
1668 /*****************************************************************************/
1669
1670
1671 #define RECEIVE_BUFFER_OFST     6
1672 #define LAN_HDR_LENGTH_OFST     8
1673 #define DLC_HDR_LENGTH_OFST     9
1674
1675 #define DSAP_OFST               0
1676 #define SSAP_OFST               1
1677 #define LLC_OFST                2
1678 #define PROTID_OFST             3
1679 #define ETHERTYPE_OFST          6
1680
1681 static void tr_rx(struct net_device *dev)
1682 {
1683         struct tok_info *ti = (struct tok_info *) dev->priv;
1684         __u32 rbuffer;
1685         void __iomem *rbuf, *rbufdata, *llc;
1686         __u8 rbuffer_page = 0;
1687         unsigned char *data;
1688         unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1689         unsigned char dlc_hdr_len;
1690         struct sk_buff *skb;
1691         unsigned int skb_size = 0;
1692         int IPv4_p = 0;
1693         unsigned int chksum = 0;
1694         struct iphdr *iph;
1695         struct arb_rec_req rarb;
1696
1697         SET_PAGE(ti->arb_page);
1698         memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1699         rbuffer = ntohs(rarb.rec_buf_addr) ;
1700         rbuf = map_address(ti, rbuffer, &rbuffer_page);
1701
1702         SET_PAGE(ti->asb_page);
1703
1704         if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1705
1706         writeb(REC_DATA, ti->asb + COMMAND_OFST);
1707         writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1708         writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1709
1710         lan_hdr_len = rarb.lan_hdr_len;
1711         if (lan_hdr_len > sizeof(struct trh_hdr)) {
1712                 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1713                 return;
1714         }                       /*BMS I added this above just to be very safe */
1715         dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1716         hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1717
1718         SET_PAGE(rbuffer_page);
1719         llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1720
1721 #if TR_VERBOSE
1722         DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1723         (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1724         DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1725                 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1726         DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1727                 "ethertype: %04X\n",
1728                 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1729                 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1730                 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1731                 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1732 #endif
1733         if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1734                 SET_PAGE(ti->asb_page);
1735                 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1736                 ti->tr_stats.rx_dropped++;
1737                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1738                 return;
1739         }
1740         length = ntohs(rarb.frame_len);
1741         if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1742            readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1743                 length >= hdr_len)      IPv4_p = 1;
1744 #if TR_VERBOSE
1745 #define SADDR_OFST      8
1746 #define DADDR_OFST      2
1747
1748         if (!IPv4_p) {
1749
1750                 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1751
1752                 DPRINTK("Probably non-IP frame received.\n");
1753                 DPRINTK("ssap: %02X dsap: %02X "
1754                         "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
1755                         "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
1756                         readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1757                         readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
1758                         readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
1759                         readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
1760                         readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
1761                         readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
1762                         readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
1763         }
1764 #endif
1765
1766         /*BMS handle the case she comes in with few hops but leaves with many */
1767         skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1768
1769         if (!(skb = dev_alloc_skb(skb_size))) {
1770                 DPRINTK("out of memory. frame dropped.\n");
1771                 ti->tr_stats.rx_dropped++;
1772                 SET_PAGE(ti->asb_page);
1773                 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1774                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1775                 return;
1776         }
1777         /*BMS again, if she comes in with few but leaves with many */
1778         skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1779         skb_put(skb, length);
1780         skb->dev = dev;
1781         data = skb->data;
1782         rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1783         rbufdata = rbuf + offsetof(struct rec_buf, data);
1784
1785         if (IPv4_p) {
1786                 /* Copy the headers without checksumming */
1787                 memcpy_fromio(data, rbufdata, hdr_len);
1788
1789                 /* Watch for padded packets and bogons */
1790                 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1791                 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1792                 length -= hdr_len;
1793                 if ((ip_len <= length) && (ip_len > 7))
1794                         length = ip_len;
1795                 data += hdr_len;
1796                 rbuffer_len -= hdr_len;
1797                 rbufdata += hdr_len;
1798         }
1799         /* Copy the payload... */
1800 #define BUFFER_POINTER_OFST     2
1801 #define BUFFER_LENGTH_OFST      6
1802         for (;;) {
1803                 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1804                         DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1805                                                 length,rbuffer_len);
1806                 if (IPv4_p)
1807                         chksum=csum_partial_copy_nocheck((void*)rbufdata,
1808                             data,length<rbuffer_len?length:rbuffer_len,chksum);
1809                 else
1810                         memcpy_fromio(data, rbufdata, rbuffer_len);
1811                 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1812                 if (!rbuffer)
1813                         break;
1814                 rbuffer -= 2;
1815                 length -= rbuffer_len;
1816                 data += rbuffer_len;
1817                 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1818                 SET_PAGE(rbuffer_page);
1819                 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1820                 rbufdata = rbuf + offsetof(struct rec_buf, data);
1821         }
1822
1823         SET_PAGE(ti->asb_page);
1824         writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1825
1826         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1827
1828         ti->tr_stats.rx_bytes += skb->len;
1829         ti->tr_stats.rx_packets++;
1830
1831         skb->protocol = tr_type_trans(skb, dev);
1832         if (IPv4_p) {
1833                 skb->csum = chksum;
1834                 skb->ip_summed = 1;
1835         }
1836         netif_rx(skb);
1837         dev->last_rx = jiffies;
1838 }                               /*tr_rx */
1839
1840 /*****************************************************************************/
1841
1842 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1843 {
1844         tmr->expires = jiffies + TR_RETRY_INTERVAL;
1845         tmr->data = (unsigned long) dev;
1846         tmr->function = tok_rerun;
1847         init_timer(tmr);
1848         add_timer(tmr);
1849 }
1850
1851 /*****************************************************************************/
1852
1853 void tok_rerun(unsigned long dev_addr){
1854
1855         struct net_device *dev = (struct net_device *)dev_addr;
1856         struct tok_info *ti = (struct tok_info *) dev->priv;
1857
1858         if ( ti->open_action == RESTART){
1859                 ti->do_tok_int = FIRST_INT;
1860                 outb(0, dev->base_addr + ADAPTRESETREL);
1861 #ifdef ENABLE_PAGING
1862                 if (ti->page_mask)
1863                         writeb(SRPR_ENABLE_PAGING,
1864                                 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1865 #endif
1866
1867                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1868         } else
1869                 tok_open_adapter(dev_addr);
1870 }
1871
1872 /*****************************************************************************/
1873
1874 static void ibmtr_readlog(struct net_device *dev)
1875 {
1876         struct tok_info *ti;
1877
1878         ti = (struct tok_info *) dev->priv;
1879
1880         ti->readlog_pending = 0;
1881         SET_PAGE(ti->srb_page);
1882         writeb(DIR_READ_LOG, ti->srb);
1883         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1884         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1885
1886         netif_stop_queue(dev);
1887
1888 }
1889
1890 /*****************************************************************************/
1891
1892 /* tok_get_stats():  Basically a scaffold routine which will return
1893    the address of the tr_statistics structure associated with
1894    this device -- the tr.... structure is an ethnet look-alike
1895    so at least for this iteration may suffice.   */
1896
1897 static struct net_device_stats *tok_get_stats(struct net_device *dev)
1898 {
1899
1900         struct tok_info *toki;
1901         toki = (struct tok_info *) dev->priv;
1902         return (struct net_device_stats *) &toki->tr_stats;
1903 }
1904
1905 /*****************************************************************************/
1906
1907 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1908 {
1909         struct tok_info *ti = (struct tok_info *) dev->priv;
1910
1911         if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1912                 return -EINVAL;
1913         if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1914                 return -EINVAL;
1915         dev->mtu = mtu;
1916         return 0;
1917 }
1918
1919 /*****************************************************************************/
1920 #ifdef MODULE
1921
1922 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1923 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1924 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1925 static int irq[IBMTR_MAX_ADAPTERS];
1926 static int mem[IBMTR_MAX_ADAPTERS];
1927
1928 MODULE_LICENSE("GPL");
1929
1930 module_param_array(io, int, NULL, 0);
1931 module_param_array(irq, int, NULL, 0);
1932 module_param_array(mem, int, NULL, 0);
1933
1934 static int __init ibmtr_init(void)
1935 {
1936         int i;
1937         int count=0;
1938
1939         find_turbo_adapters(io);
1940
1941         for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1942                 struct net_device *dev;
1943                 irq[i] = 0;
1944                 mem[i] = 0;
1945                 dev = alloc_trdev(sizeof(struct tok_info));
1946                 if (dev == NULL) {
1947                         if (i == 0)
1948                                 return -ENOMEM;
1949                         break;
1950                 }
1951                 dev->base_addr = io[i];
1952                 dev->irq = irq[i];
1953                 dev->mem_start = mem[i];
1954
1955                 if (ibmtr_probe_card(dev)) {
1956                         free_netdev(dev);
1957                         continue;
1958                 }
1959                 dev_ibmtr[i] = dev;
1960                 count++;
1961         }
1962         if (count) return 0;
1963         printk("ibmtr: register_netdev() returned non-zero.\n");
1964         return -EIO;
1965 }
1966 module_init(ibmtr_init);
1967
1968 static void __exit ibmtr_cleanup(void)
1969 {
1970         int i;
1971
1972         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1973                 if (!dev_ibmtr[i])
1974                         continue;
1975                 unregister_netdev(dev_ibmtr[i]);
1976                 ibmtr_cleanup_card(dev_ibmtr[i]);
1977                 free_netdev(dev_ibmtr[i]);
1978         }
1979 }
1980 module_exit(ibmtr_cleanup);
1981 #endif