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(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                         return -ENODEV;
 535                 }
 536                 ti->sram_phys =
 537                      ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
 538                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
 539                 break;
 540         } /*end switch (cardpresent) */
 541 #endif  /*not PCMCIA */
 542
 543         if (ibmtr_debug_trace & TRC_INIT) {     /* just report int */
 544                 DPRINTK("irq=%d", irq);
 545                 printk(", sram_phys=0x%x", ti->sram_phys);
 546                 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
 547                         DPRINTK(", ti->mmio=%p", ti->mmio);
 548                         printk(", segment=%02X", segment);
 549                 }
 550                 printk(".\n");
 551         }
 552
 553         /* Get hw address of token ring card */
 554         j = 0;
 555         for (i = 0; i < 0x18; i = i + 2) {
 556                 /* technical reference states to do this */
 557                 temp = readb(ti->mmio + AIP + i) & 0x0f;
 558                 ti->hw_address[j] = temp;
 559                 if (j & 1)
 560                         dev->dev_addr[(j / 2)] =
 561                                 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
 562                 ++j;
 563         }
 564         /* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
 565         ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
 566
 567         /* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
 568         ti->data_rate = readb(ti->mmio + AIPDATARATE);
 569
 570         /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
 571         ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
 572
 573         /* How much shared RAM is on adapter ? */
 574         if (ti->turbo) {
 575                 ti->avail_shared_ram=127;
 576         } else {
 577                 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
 578         }
 579         /* We need to set or do a bunch of work here based on previous results*/
 580         /* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
 581         ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
 582
 583         /* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
 584         switch (readb(ti->mmio + AIP4MBDHB)) {
 585         case 0xe: ti->dhb_size4mb = 4096; break;
 586         case 0xd: ti->dhb_size4mb = 4464; break;
 587         default:  ti->dhb_size4mb = 2048; break;
 588         }
 589
 590         /* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
 591         switch (readb(ti->mmio + AIP16MBDHB)) {
 592         case 0xe: ti->dhb_size16mb = 4096; break;
 593         case 0xd: ti->dhb_size16mb = 8192; break;
 594         case 0xc: ti->dhb_size16mb = 16384; break;
 595         case 0xb: ti->dhb_size16mb = 17960; break;
 596         default:  ti->dhb_size16mb = 2048; break;
 597         }
 598
 599         /*    We must figure out how much shared memory space this adapter
 600          *    will occupy so that if there are two adapters we can fit both
 601          *    in.  Given a choice, we will limit this adapter to 32K.  The
 602          *    maximum space will will use for two adapters is 64K so if the
 603          *    adapter we are working on demands 64K (it also doesn't support
 604          *    paging), then only one adapter can be supported.
 605          */
 606
 607         /*
 608          *    determine how much of total RAM is mapped into PC space
 609          */
 610         ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
 611             1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
 612         ti->page_mask = 0;
 613         if (ti->turbo)  ti->page_mask=0xf0;
 614         else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
 615         else {
 616 #ifdef ENABLE_PAGING
 617                 unsigned char pg_size = 0;
 618                 /* BMS:   page size: PCMCIA, use configuration register;
 619                    ISAPNP, use LANAIDC config tool from www.ibm.com  */
 620                 switch (ti->shared_ram_paging) {
 621                 case 0xf:
 622                         break;
 623                 case 0xe:
 624                         ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
 625                         pg_size = 32;   /* 16KB page size */
 626                         break;
 627                 case 0xd:
 628                         ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
 629                         pg_size = 64;   /* 32KB page size */
 630                         break;
 631                 case 0xc:
 632                         switch (ti->mapped_ram_size) {
 633                         case 32:
 634                                 ti->page_mask = 0xc0;
 635                                 pg_size = 32;
 636                                 break;
 637                         case 64:
 638                                 ti->page_mask = 0x80;
 639                                 pg_size = 64;
 640                                 break;
 641                         }
 642                         break;
 643                 default:
 644                         DPRINTK("Unknown shared ram paging info %01X\n",
 645                                                         ti->shared_ram_paging);
 646                         iounmap(t_mmio);
 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                         return -ENODEV;
 677                 } else { /* seems cool, record what we have figured out */
 678                         ti->sram_base = new_base >> 12;
 679                         ibmtr_mem_base = chk_base;
 680                 }
 681         }
 682         else  ti->sram_base = ti->sram_phys >> 12;
 683
 684         /* The PCMCIA has already got the interrupt line and the io port,
 685            so no chance of anybody else getting it - MLP */
 686         if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
 687                 DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
 688                                         irq);
 689                 iounmap(t_mmio);
 690                 return -ENODEV;
 691         }
 692         /*?? Now, allocate some of the PIO PORTs for this driver.. */
 693         /* record PIOaddr range as busy */
 694         if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
 695                 DPRINTK("Could not grab PIO range. Halting driver.\n");
 696                 free_irq(dev->irq, dev);
 697                 iounmap(t_mmio);
 698                 return -EBUSY;
 699         }
 700
 701         if (!version_printed++) {
 702                 printk(version);
 703         }
 704 #endif /* !PCMCIA */
 705         DPRINTK("%s %s found\n",
 706                 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
 707         DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
 708                         irq, PIOaddr, ti->mapped_ram_size / 2);
 709         DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
 710                 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 711                 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 712         if (ti->page_mask)
 713                 DPRINTK("Shared RAM paging enabled. "
 714                         "Page size: %uK Shared Ram size %dK\n",
 715                         ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
 716         else
 717                 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
 718                                                                 ti->page_mask);
 719
 720         /* Calculate the maximum DHB we can use */
 721         /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
 722             1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
 723             2. user has configured adapter for less than avail_shared_ram
 724                but is not using paging (she should use paging, I believe)
 725         */
 726         if (!ti->page_mask) {
 727                 ti->avail_shared_ram=
 728                                 min(ti->mapped_ram_size,ti->avail_shared_ram);
 729         }
 730
 731         switch (ti->avail_shared_ram) {
 732         case 16:                /* 8KB shared RAM */
 733                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
 734                 ti->rbuf_len4 = 1032;
 735                 ti->rbuf_cnt4=2;
 736                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
 737                 ti->rbuf_len16 = 1032;
 738                 ti->rbuf_cnt16=2;
 739                 break;
 740         case 32:                /* 16KB shared RAM */
 741                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 742                 ti->rbuf_len4 = 1032;
 743                 ti->rbuf_cnt4=4;
 744                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
 745                 ti->rbuf_len16 = 1032;  /*1024 usable */
 746                 ti->rbuf_cnt16=4;
 747                 break;
 748         case 64:                /* 32KB shared RAM */
 749                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 750                 ti->rbuf_len4 = 1032;
 751                 ti->rbuf_cnt4=6;
 752                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
 753                 ti->rbuf_len16 = 1032;
 754                 ti->rbuf_cnt16=6;
 755                 break;
 756         case 127:               /* 63.5KB shared RAM */
 757                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 758                 ti->rbuf_len4 = 1032;
 759                 ti->rbuf_cnt4=6;
 760                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
 761                 ti->rbuf_len16 = 1032;
 762                 ti->rbuf_cnt16=16;
 763                 break;
 764         case 128:               /* 64KB   shared RAM */
 765                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
 766                 ti->rbuf_len4 = 1032;
 767                 ti->rbuf_cnt4=6;
 768                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
 769                 ti->rbuf_len16 = 1032;
 770                 ti->rbuf_cnt16=16;
 771                 break;
 772         default:
 773                 ti->dhb_size4mb = 2048;
 774                 ti->rbuf_len4 = 1032;
 775                 ti->rbuf_cnt4=2;
 776                 ti->dhb_size16mb = 2048;
 777                 ti->rbuf_len16 = 1032;
 778                 ti->rbuf_cnt16=2;
 779                 break;
 780         }
 781         /* this formula is not smart enough for the paging case
 782         ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
 783                         ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
 784                         DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
 785                         SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
 786         */
 787         ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
 788         ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
 789         /*BMS assuming 18 bytes of Routing Information (usually works) */
 790         DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
 791                                                      ti->maxmtu16, ti->maxmtu4);
 792
 793         dev->base_addr = PIOaddr;       /* set the value for device */
 794         dev->mem_start = ti->sram_base << 12;
 795         dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
 796         trdev_init(dev);
 797         return 0;   /* Return 0 to indicate we have found a Token Ring card. */
 798 }                               /*ibmtr_probe1() */
 799
 800 /*****************************************************************************/
 801
 802 /* query the adapter for the size of shared RAM  */
 803 /* the function returns the RAM size in units of 512 bytes */
 804
 805 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
 806 {
 807         unsigned char avail_sram_code;
 808         static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
 809         /* Adapter gives
 810            'F' -- use RRR bits 3,2
 811            'E' -- 8kb   'D' -- 16kb
 812            'C' -- 32kb  'A' -- 64KB
 813            'B' - 64KB less 512 bytes at top
 814            (WARNING ... must zero top bytes in INIT */
 815
 816         avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
 817         if (avail_sram_code) return size_code[avail_sram_code];
 818         else            /* for code 'F', must compute size from RRR(3,2) bits */
 819                 return 1 <<
 820                  ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
 821 }
 822
 823 /*****************************************************************************/
 824
 825 static int __devinit trdev_init(struct net_device *dev)
 826 {
 827         struct tok_info *ti = (struct tok_info *) dev->priv;
 828
 829         SET_PAGE(ti->srb_page);
 830         ti->open_failure = NO    ;
 831         dev->open = tok_open;
 832         dev->stop = tok_close;
 833         dev->hard_start_xmit = tok_send_packet;
 834         dev->get_stats = tok_get_stats;
 835         dev->set_multicast_list = tok_set_multicast_list;
 836         dev->change_mtu = ibmtr_change_mtu;
 837
 838         return 0;
 839 }
 840
 841 /*****************************************************************************/
 842
 843 static int tok_init_card(struct net_device *dev)
 844 {
 845         struct tok_info *ti;
 846         short PIOaddr;
 847         unsigned long i;
 848
 849         PIOaddr = dev->base_addr;
 850         ti = (struct tok_info *) dev->priv;
 851         /* Special processing for first interrupt after reset */
 852         ti->do_tok_int = FIRST_INT;
 853         /* Reset adapter */
 854         writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
 855         outb(0, PIOaddr + ADAPTRESET);
 856
 857         current->state=TASK_UNINTERRUPTIBLE;
 858         schedule_timeout(TR_RST_TIME); /* wait 50ms */
 859
 860         outb(0, PIOaddr + ADAPTRESETREL);
 861 #ifdef ENABLE_PAGING
 862         if (ti->page_mask)
 863                 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
 864 #endif
 865         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 866         i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
 867         return i? 0 : -EAGAIN;
 868 }
 869
 870 /*****************************************************************************/
 871 static int tok_open(struct net_device *dev)
 872 {
 873         struct tok_info *ti = (struct tok_info *) dev->priv;
 874         int i;
 875
 876         /*the case we were left in a failure state during a previous open */
 877         if (ti->open_failure == YES) {
 878                 DPRINTK("Last time you were disconnected, how about now?\n");
 879                 printk("You can't insert with an ICS connector half-cocked.\n");
 880         }
 881
 882         ti->open_status  = CLOSED; /* CLOSED or OPEN      */
 883         ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
 884         ti->open_failure =     NO; /* NO     or YES       */
 885         ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
 886
 887         ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
 888         /* init the spinlock */
 889         spin_lock_init(&ti->lock);
 890         init_timer(&ti->tr_timer);
 891
 892         i = tok_init_card(dev);
 893         if (i) return i;
 894
 895         while (1){
 896                 tok_open_adapter((unsigned long) dev);
 897                 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
 898                 /* sig catch: estimate opening adapter takes more than .5 sec*/
 899                 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
 900                 if (i==0) break;
 901                 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
 902                         netif_start_queue(dev);
 903                         DPRINTK("Adapter is up and running\n");
 904                         return 0;
 905                 }
 906                 current->state=TASK_INTERRUPTIBLE;
 907                 i=schedule_timeout(TR_RETRY_INTERVAL); /* wait 30 seconds */
 908                 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
 909         }
 910         outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
 911         DPRINTK("TERMINATED via signal\n");     /*BMS useful */
 912         return -EAGAIN;
 913 }
 914
 915 /*****************************************************************************/
 916
 917 #define COMMAND_OFST             0
 918 #define OPEN_OPTIONS_OFST        8
 919 #define NUM_RCV_BUF_OFST        24
 920 #define RCV_BUF_LEN_OFST        26
 921 #define DHB_LENGTH_OFST         28
 922 #define NUM_DHB_OFST            30
 923 #define DLC_MAX_SAP_OFST        32
 924 #define DLC_MAX_STA_OFST        33
 925
 926 static void tok_open_adapter(unsigned long dev_addr)
 927 {
 928         struct net_device *dev = (struct net_device *) dev_addr;
 929         struct tok_info *ti;
 930         int i;
 931
 932         ti = (struct tok_info *) dev->priv;
 933         SET_PAGE(ti->init_srb_page);
 934         writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
 935         for (i = 0; i < sizeof(struct dir_open_adapter); i++)
 936                 writeb(0, ti->init_srb + i);
 937         writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
 938         writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
 939         if (ti->ring_speed == 16) {
 940                 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
 941                 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
 942                 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
 943         } else {
 944                 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
 945                 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
 946                 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
 947         }
 948         writeb(NUM_DHB,         /* always 2 */ ti->init_srb + NUM_DHB_OFST);
 949         writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
 950         writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
 951         ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
 952         ti->srb_page = ti->init_srb_page;
 953         DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
 954                 readb(ti->init_srb + NUM_DHB_OFST),
 955                 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
 956                 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
 957                 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
 958         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
 959         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 960 }
 961
 962 /*****************************************************************************/
 963
 964 static void open_sap(unsigned char type, struct net_device *dev)
 965 {
 966         int i;
 967         struct tok_info *ti = (struct tok_info *) dev->priv;
 968
 969         SET_PAGE(ti->srb_page);
 970         for (i = 0; i < sizeof(struct dlc_open_sap); i++)
 971                 writeb(0, ti->srb + i);
 972
 973 #define MAX_I_FIELD_OFST        14
 974 #define SAP_VALUE_OFST          16
 975 #define SAP_OPTIONS_OFST        17
 976 #define STATION_COUNT_OFST      18
 977
 978         writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
 979         writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
 980         writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
 981         writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
 982         writeb(type, ti->srb + SAP_VALUE_OFST);
 983         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
 984 }
 985
 986
 987 /*****************************************************************************/
 988
 989 static void tok_set_multicast_list(struct net_device *dev)
 990 {
 991         struct tok_info *ti = (struct tok_info *) dev->priv;
 992         struct dev_mc_list *mclist;
 993         unsigned char address[4];
 994
 995         int i;
 996
 997         /*BMS the next line is CRUCIAL or you may be sad when you */
 998         /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
 999         if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
1000         address[0] = address[1] = address[2] = address[3] = 0;
1001         mclist = dev->mc_list;
1002         for (i = 0; i < dev->mc_count; i++) {
1003                 address[0] |= mclist->dmi_addr[2];
1004                 address[1] |= mclist->dmi_addr[3];
1005                 address[2] |= mclist->dmi_addr[4];
1006                 address[3] |= mclist->dmi_addr[5];
1007                 mclist = mclist->next;
1008         }
1009         SET_PAGE(ti->srb_page);
1010         for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1011                 writeb(0, ti->srb + i);
1012
1013 #define FUNCT_ADDRESS_OFST 6
1014
1015         writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1016         for (i = 0; i < 4; i++)
1017                 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1018         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1019 #if TR_VERBOSE
1020         DPRINTK("Setting functional address: ");
1021         for (i=0;i<4;i++)  printk("%02X ", address[i]);
1022         printk("\n");
1023 #endif
1024 }
1025
1026 /*****************************************************************************/
1027
1028 #define STATION_ID_OFST 4
1029
1030 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1031 {
1032         struct tok_info *ti;
1033         unsigned long flags;
1034         ti = (struct tok_info *) dev->priv;
1035
1036         netif_stop_queue(dev);
1037
1038         /* lock against other CPUs */
1039         spin_lock_irqsave(&(ti->lock), flags);
1040
1041         /* Save skb; we'll need it when the adapter asks for the data */
1042         ti->current_skb = skb;
1043         SET_PAGE(ti->srb_page);
1044         writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1045         writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1046         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1047         spin_unlock_irqrestore(&(ti->lock), flags);
1048         dev->trans_start = jiffies;
1049         return 0;
1050 }
1051
1052 /*****************************************************************************/
1053
1054 static int tok_close(struct net_device *dev)
1055 {
1056         struct tok_info *ti = (struct tok_info *) dev->priv;
1057
1058         /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1059         /* unloading the module from memory, and then if a timer pops, ouch */
1060         del_timer_sync(&ti->tr_timer);
1061         outb(0, dev->base_addr + ADAPTRESET);
1062         ti->sram_phys |= 1;
1063         ti->open_status = CLOSED;
1064
1065         netif_stop_queue(dev);
1066         DPRINTK("Adapter is closed.\n");
1067         return 0;
1068 }
1069
1070 /*****************************************************************************/
1071
1072 #define RETCODE_OFST            2
1073 #define OPEN_ERROR_CODE_OFST    6
1074 #define ASB_ADDRESS_OFST        8
1075 #define SRB_ADDRESS_OFST        10
1076 #define ARB_ADDRESS_OFST        12
1077 #define SSB_ADDRESS_OFST        14
1078
1079 static char *printphase[]= {"Lobe media test","Physical insertion",
1080               "Address verification","Roll call poll","Request Parameters"};
1081 static char *printerror[]={"Function failure","Signal loss","Reserved",
1082                 "Frequency error","Timeout","Ring failure","Ring beaconing",
1083                 "Duplicate node address",
1084                 "Parameter request-retry count exceeded","Remove received",
1085                 "IMPL force received","Duplicate modifier",
1086                 "No monitor detected","Monitor contention failed for RPL"};
1087
1088 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1089 {
1090         if (ti->page_mask) {
1091                 *page = (index >> 8) & ti->page_mask;
1092                 index &= ~(ti->page_mask << 8);
1093         }
1094         return ti->sram_virt + index;
1095 }
1096
1097 static void dir_open_adapter (struct net_device *dev)
1098 {
1099         struct tok_info *ti = (struct tok_info *) dev->priv;
1100         unsigned char ret_code;
1101         __u16 err;
1102
1103         ti->srb = map_address(ti,
1104                 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1105                 &ti->srb_page);
1106         ti->ssb = map_address(ti,
1107                 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1108                 &ti->ssb_page);
1109         ti->arb = map_address(ti,
1110                 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1111                 &ti->arb_page);
1112         ti->asb = map_address(ti,
1113                 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1114                 &ti->asb_page);
1115         ti->current_skb = NULL;
1116         ret_code = readb(ti->init_srb + RETCODE_OFST);
1117         err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1118         if (!ret_code) {
1119                 ti->open_status = OPEN; /* TR adapter is now available */
1120                 if (ti->open_mode == AUTOMATIC) {
1121                         DPRINTK("Adapter reopened.\n");
1122                 }
1123                 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1124                 open_sap(EXTENDED_SAP, dev);
1125                 return;
1126         }
1127         ti->open_failure = YES;
1128         if (ret_code == 7){
1129                if (err == 0x24) {
1130                         if (!ti->auto_speedsave) {
1131                                 DPRINTK("Open failed: Adapter speed must match "
1132                                  "ring speed if Automatic Ring Speed Save is "
1133                                  "disabled.\n");
1134                                 ti->open_action = FAIL;
1135                         }else
1136                                 DPRINTK("Retrying open to adjust to "
1137                                         "ring speed, ");
1138                 } else if (err == 0x2d) {
1139                         DPRINTK("Physical Insertion: No Monitor Detected, ");
1140                         printk("retrying after %ds delay...\n",
1141                                         TR_RETRY_INTERVAL/HZ);
1142                 } else if (err == 0x11) {
1143                         DPRINTK("Lobe Media Function Failure (0x11), ");
1144                         printk(" retrying after %ds delay...\n",
1145                                         TR_RETRY_INTERVAL/HZ);
1146                 } else {
1147                         char **prphase = printphase;
1148                         char **prerror = printerror;
1149                         DPRINTK("TR Adapter misc open failure, error code = ");
1150                         printk("0x%x, Phase: %s, Error: %s\n",
1151                                 err, prphase[err/16 -1], prerror[err%16 -1]);
1152                         printk(" retrying after %ds delay...\n",
1153                                         TR_RETRY_INTERVAL/HZ);
1154                 }
1155         } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1156         if (ti->open_action != FAIL) {
1157                 if (ti->open_mode==AUTOMATIC){
1158                         ti->open_action = REOPEN;
1159                         ibmtr_reset_timer(&(ti->tr_timer), dev);
1160                         return;
1161                 }
1162                 wake_up(&ti->wait_for_reset);
1163                 return;
1164         }
1165         DPRINTK("FAILURE, CAPUT\n");
1166 }
1167
1168 /******************************************************************************/
1169
1170 static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1171 {
1172         unsigned char status;
1173         /*  unsigned char status_even ; */
1174         struct tok_info *ti;
1175         struct net_device *dev;
1176 #ifdef ENABLE_PAGING
1177         unsigned char save_srpr;
1178 #endif
1179
1180         dev = dev_id;
1181 #if TR_VERBOSE
1182         DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
1183 #endif
1184         ti = (struct tok_info *) dev->priv;
1185         if (ti->sram_phys & 1)
1186                 return IRQ_NONE;         /* PCMCIA card extraction flag */
1187         spin_lock(&(ti->lock));
1188 #ifdef ENABLE_PAGING
1189         save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1190 #endif
1191
1192         /* Disable interrupts till processing is finished */
1193         writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1194
1195         /* Reset interrupt for ISA boards */
1196         if (ti->adapter_int_enable)
1197                 outb(0, ti->adapter_int_enable);
1198         else /* used for PCMCIA cards */
1199                 outb(0, ti->global_int_enable);
1200         if (ti->do_tok_int == FIRST_INT){
1201                 initial_tok_int(dev);
1202 #ifdef ENABLE_PAGING
1203                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1204 #endif
1205                 spin_unlock(&(ti->lock));
1206                 return IRQ_HANDLED;
1207         }
1208         /*  Begin interrupt handler HERE inline to avoid the extra
1209             levels of logic and call depth for the original solution. */
1210         status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1211         /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1212         /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1213         /*BMS                                       status,status_even);      */
1214
1215         if (status & ADAP_CHK_INT) {
1216                 int i;
1217                 void __iomem *check_reason;
1218                 __u8 check_reason_page = 0;
1219                 check_reason = map_address(ti,
1220                         ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1221                         &check_reason_page);
1222                 SET_PAGE(check_reason_page);
1223
1224                 DPRINTK("Adapter check interrupt\n");
1225                 DPRINTK("8 reason bytes follow: ");
1226                 for (i = 0; i < 8; i++, check_reason++)
1227                         printk("%02X ", (int) readb(check_reason));
1228                 printk("\n");
1229                 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1230                 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1231                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1232                 ti->open_status = CLOSED;
1233                 ti->sap_status  = CLOSED;
1234                 ti->open_mode   = AUTOMATIC;
1235                 netif_carrier_off(dev);
1236                 netif_stop_queue(dev);
1237                 ti->open_action = RESTART;
1238                 outb(0, dev->base_addr + ADAPTRESET);
1239                 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1240                 spin_unlock(&(ti->lock));
1241                 return IRQ_HANDLED;
1242         }
1243         if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1244                 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1245                 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1246                         (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1247                 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1248                         ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1249                 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1250                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1251                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1252 #ifdef ENABLE_PAGING
1253                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1254 #endif
1255                 spin_unlock(&(ti->lock));
1256                 return IRQ_HANDLED;
1257         }
1258         if (status & SRB_RESP_INT) {    /* SRB response */
1259                 SET_PAGE(ti->srb_page);
1260 #if TR_VERBOSE
1261                 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1262                                 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1263 #endif
1264                 switch (readb(ti->srb)) {       /* SRB command check */
1265                 case XMIT_DIR_FRAME:{
1266                         unsigned char xmit_ret_code;
1267                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1268                         if (xmit_ret_code == 0xff) break;
1269                         DPRINTK("error on xmit_dir_frame request: %02X\n",
1270                                                                 xmit_ret_code);
1271                         if (ti->current_skb) {
1272                                 dev_kfree_skb_irq(ti->current_skb);
1273                                 ti->current_skb = NULL;
1274                         }
1275                         /*dev->tbusy = 0;*/
1276                         netif_wake_queue(dev);
1277                         if (ti->readlog_pending)
1278                                 ibmtr_readlog(dev);
1279                         break;
1280                 }
1281                 case XMIT_UI_FRAME:{
1282                         unsigned char xmit_ret_code;
1283
1284                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1285                         if (xmit_ret_code == 0xff) break;
1286                         DPRINTK("error on xmit_ui_frame request: %02X\n",
1287                                                                 xmit_ret_code);
1288                         if (ti->current_skb) {
1289                                 dev_kfree_skb_irq(ti->current_skb);
1290                                 ti->current_skb = NULL;
1291                         }
1292                         netif_wake_queue(dev);
1293                         if (ti->readlog_pending)
1294                                 ibmtr_readlog(dev);
1295                         break;
1296                 }
1297                 case DIR_OPEN_ADAPTER:
1298                         dir_open_adapter(dev);
1299                         break;
1300                 case DLC_OPEN_SAP:
1301                         if (readb(ti->srb + RETCODE_OFST)) {
1302                                 DPRINTK("open_sap failed: ret_code = %02X, "
1303                                         "retrying\n",
1304                                         (int) readb(ti->srb + RETCODE_OFST));
1305                                 ti->open_action = REOPEN;
1306                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1307                                 break;
1308                         }
1309                         ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1310                         ti->sap_status = OPEN;/* TR adapter is now available */
1311                         if (ti->open_mode==MANUAL){
1312                                 wake_up(&ti->wait_for_reset);
1313                                 break;
1314                         }
1315                         netif_wake_queue(dev);
1316                         netif_carrier_on(dev);
1317                         break;
1318                 case DIR_INTERRUPT:
1319                 case DIR_MOD_OPEN_PARAMS:
1320                 case DIR_SET_GRP_ADDR:
1321                 case DIR_SET_FUNC_ADDR:
1322                 case DLC_CLOSE_SAP:
1323                         if (readb(ti->srb + RETCODE_OFST))
1324                                 DPRINTK("error on %02X: %02X\n",
1325                                         (int) readb(ti->srb + COMMAND_OFST),
1326                                         (int) readb(ti->srb + RETCODE_OFST));
1327                         break;
1328                 case DIR_READ_LOG:
1329                         if (readb(ti->srb + RETCODE_OFST)){
1330                                 DPRINTK("error on dir_read_log: %02X\n",
1331                                         (int) readb(ti->srb + RETCODE_OFST));
1332                                 netif_wake_queue(dev);
1333                                 break;
1334                         }
1335 #if IBMTR_DEBUG_MESSAGES
1336
1337 #define LINE_ERRORS_OFST                 0
1338 #define INTERNAL_ERRORS_OFST             1
1339 #define BURST_ERRORS_OFST                2
1340 #define AC_ERRORS_OFST                   3
1341 #define ABORT_DELIMITERS_OFST            4
1342 #define LOST_FRAMES_OFST                 6
1343 #define RECV_CONGEST_COUNT_OFST          7
1344 #define FRAME_COPIED_ERRORS_OFST         8
1345 #define FREQUENCY_ERRORS_OFST            9
1346 #define TOKEN_ERRORS_OFST               10
1347
1348                         DPRINTK("Line errors %02X, Internal errors %02X, "
1349                         "Burst errors %02X\n" "A/C errors %02X, "
1350                         "Abort delimiters %02X, Lost frames %02X\n"
1351                         "Receive congestion count %02X, "
1352                         "Frame copied errors %02X\nFrequency errors %02X, "
1353                         "Token errors %02X\n",
1354                         (int) readb(ti->srb + LINE_ERRORS_OFST),
1355                         (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1356                         (int) readb(ti->srb + BURST_ERRORS_OFST),
1357                         (int) readb(ti->srb + AC_ERRORS_OFST),
1358                         (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1359                         (int) readb(ti->srb + LOST_FRAMES_OFST),
1360                         (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1361                         (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1362                         (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1363                         (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1364 #endif
1365                         netif_wake_queue(dev);
1366                         break;
1367                 default:
1368                         DPRINTK("Unknown command %02X encountered\n",
1369                                                 (int) readb(ti->srb));
1370                 }       /* end switch SRB command check */
1371                 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1372         }       /* if SRB response */
1373         if (status & ASB_FREE_INT) {    /* ASB response */
1374                 SET_PAGE(ti->asb_page);
1375 #if TR_VERBOSE
1376                 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1377 #endif
1378
1379                 switch (readb(ti->asb)) {       /* ASB command check */
1380                 case REC_DATA:
1381                 case XMIT_UI_FRAME:
1382                 case XMIT_DIR_FRAME:
1383                         break;
1384                 default:
1385                         DPRINTK("unknown command in asb %02X\n",
1386                                                 (int) readb(ti->asb));
1387                 }       /* switch ASB command check */
1388                 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1389                         DPRINTK("ASB error %02X in cmd %02X\n",
1390                                 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1391                 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1392         }       /* if ASB response */
1393
1394 #define STATUS_OFST             6
1395 #define NETW_STATUS_OFST        6
1396
1397         if (status & ARB_CMD_INT) {     /* ARB response */
1398                 SET_PAGE(ti->arb_page);
1399 #if TR_VERBOSE
1400                 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1401 #endif
1402
1403                 switch (readb(ti->arb)) {       /* ARB command check */
1404                 case DLC_STATUS:
1405                         DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1406                                 ntohs(readw(ti->arb + STATUS_OFST)),
1407                                 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1408                         break;
1409                 case REC_DATA:
1410                         tr_rx(dev);
1411                         break;
1412                 case RING_STAT_CHANGE:{
1413                         unsigned short ring_status;
1414                         ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1415                         if (ibmtr_debug_trace & TRC_INIT)
1416                                 DPRINTK("Ring Status Change...(0x%x)\n",
1417                                                                 ring_status);
1418                         if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1419                                 netif_stop_queue(dev);
1420                                 netif_carrier_off(dev);
1421                                 DPRINTK("Remove received, or Auto-removal error"
1422                                         ", or Lobe fault\n");
1423                                 DPRINTK("We'll try to reopen the closed adapter"
1424                                         " after a %d second delay.\n",
1425                                                 TR_RETRY_INTERVAL/HZ);
1426                                 /*I was confused: I saw the TR reopening but */
1427                                 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1428                                 /*but adapter not in the ring, the TR will   */
1429                                 /* open, and then soon close and come here.  */
1430                                 ti->open_mode = AUTOMATIC;
1431                                 ti->open_status = CLOSED; /*12/2000 BMS*/
1432                                 ti->open_action = REOPEN;
1433                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1434                         } else if (ring_status & LOG_OVERFLOW) {
1435                                 if(netif_queue_stopped(dev))
1436                                         ti->readlog_pending = 1;
1437                                 else
1438                                         ibmtr_readlog(dev);
1439                         }
1440                         break;
1441                 }
1442                 case XMIT_DATA_REQ:
1443                         tr_tx(dev);
1444                         break;
1445                 default:
1446                         DPRINTK("Unknown command %02X in arb\n",
1447                                                 (int) readb(ti->arb));
1448                         break;
1449                 }       /* switch ARB command check */
1450                 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1451                 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1452         }       /* if ARB response */
1453         if (status & SSB_RESP_INT) {    /* SSB response */
1454                 unsigned char retcode;
1455                 SET_PAGE(ti->ssb_page);
1456 #if TR_VERBOSE
1457                 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1458                                 readb(ti->ssb), readb(ti->ssb + 2));
1459 #endif
1460
1461                 switch (readb(ti->ssb)) {       /* SSB command check */
1462                 case XMIT_DIR_FRAME:
1463                 case XMIT_UI_FRAME:
1464                         retcode = readb(ti->ssb + 2);
1465                         if (retcode && (retcode != 0x22))/* checks ret_code */
1466                                 DPRINTK("xmit ret_code: %02X xmit error code: "
1467                                         "%02X\n",
1468                                         (int)retcode, (int)readb(ti->ssb + 6));
1469                         else
1470                                 ti->tr_stats.tx_packets++;
1471                         break;
1472                 case XMIT_XID_CMD:
1473                         DPRINTK("xmit xid ret_code: %02X\n",
1474                                                 (int) readb(ti->ssb + 2));
1475                 default:
1476                         DPRINTK("Unknown command %02X in ssb\n",
1477                                                 (int) readb(ti->ssb));
1478                 }       /* SSB command check */
1479                 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1480                 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1481         }       /* if SSB response */
1482 #ifdef ENABLE_PAGING
1483         writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1484 #endif
1485         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1486         spin_unlock(&(ti->lock));
1487         return IRQ_HANDLED;
1488 }                               /*tok_interrupt */
1489
1490 /*****************************************************************************/
1491
1492 #define INIT_STATUS_OFST        1
1493 #define INIT_STATUS_2_OFST      2
1494 #define ENCODED_ADDRESS_OFST    8
1495
1496 static void initial_tok_int(struct net_device *dev)
1497 {
1498
1499         __u32 encoded_addr, hw_encoded_addr;
1500         struct tok_info *ti;
1501         unsigned char init_status; /*BMS 12/2000*/
1502
1503         ti = (struct tok_info *) dev->priv;
1504
1505         ti->do_tok_int = NOT_FIRST;
1506
1507         /* we assign the shared-ram address for ISA devices */
1508         writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1509 #ifndef PCMCIA
1510         ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1511 #endif
1512         ti->init_srb = map_address(ti,
1513                 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1514                 &ti->init_srb_page);
1515         if (ti->page_mask && ti->avail_shared_ram == 127) {
1516                 void __iomem *last_512;
1517                 __u8 last_512_page=0;
1518                 int i;
1519                 last_512 = map_address(ti, 0xfe00, &last_512_page);
1520                 /* initialize high section of ram (if necessary) */
1521                 SET_PAGE(last_512_page);
1522                 for (i = 0; i < 512; i++)
1523                         writeb(0, last_512 + i);
1524         }
1525         SET_PAGE(ti->init_srb_page);
1526
1527 #if TR_VERBOSE
1528         {
1529         int i;
1530
1531         DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1532         DPRINTK("init_srb(%p):", ti->init_srb );
1533         for (i = 0; i < 20; i++)
1534                 printk("%02X ", (int) readb(ti->init_srb + i));
1535         printk("\n");
1536         }
1537 #endif
1538
1539         hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1540         encoded_addr = ntohs(hw_encoded_addr);
1541         init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1542         readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1543         /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1544         ti->ring_speed = init_status & 0x01 ? 16 : 4;
1545         DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1546                                 ti->ring_speed, (unsigned int)dev->mem_start);
1547         ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
1548
1549         if (ti->open_mode == MANUAL)    wake_up(&ti->wait_for_reset);
1550         else                            tok_open_adapter((unsigned long)dev);
1551
1552 } /*initial_tok_int() */
1553
1554 /*****************************************************************************/
1555
1556 #define CMD_CORRELATE_OFST      1
1557 #define DHB_ADDRESS_OFST        6
1558
1559 #define FRAME_LENGTH_OFST       6
1560 #define HEADER_LENGTH_OFST      8
1561 #define RSAP_VALUE_OFST         9
1562
1563 static void tr_tx(struct net_device *dev)
1564 {
1565         struct tok_info *ti = (struct tok_info *) dev->priv;
1566         struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1567         unsigned int hdr_len;
1568         __u32 dhb=0,dhb_base;
1569         void __iomem *dhbuf = NULL;
1570         unsigned char xmit_command;
1571         int i,dhb_len=0x4000,src_len,src_offset;
1572         struct trllc *llc;
1573         struct srb_xmit xsrb;
1574         __u8 dhb_page = 0;
1575         __u8 llc_ssap;
1576
1577         SET_PAGE(ti->asb_page);
1578
1579         if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1580
1581         /* in providing the transmit interrupts, is telling us it is ready for
1582            data and providing a shared memory address for us to stuff with data.
1583            Here we compute the effective address where we will place data.
1584         */
1585         SET_PAGE(ti->arb_page);
1586         dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1587         if (ti->page_mask) {
1588                 dhb_page = (dhb_base >> 8) & ti->page_mask;
1589                 dhb=dhb_base & ~(ti->page_mask << 8);
1590         }
1591         dhbuf = ti->sram_virt + dhb;
1592
1593         /* Figure out the size of the 802.5 header */
1594         if (!(trhdr->saddr[0] & 0x80))  /* RIF present? */
1595                 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1596         else
1597                 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1598                     + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1599
1600         llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1601
1602         llc_ssap = llc->ssap;
1603         SET_PAGE(ti->srb_page);
1604         memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1605         SET_PAGE(ti->asb_page);
1606         xmit_command = xsrb.command;
1607
1608         writeb(xmit_command, ti->asb + COMMAND_OFST);
1609         writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1610         writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1611         writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1612         writeb(0, ti->asb + RETCODE_OFST);
1613         if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1614                 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1615                 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1616                 SET_PAGE(dhb_page);
1617                 writeb(AC, dhbuf);
1618                 writeb(LLC_FRAME, dhbuf + 1);
1619                 for (i = 0; i < TR_ALEN; i++)
1620                         writeb((int) 0x0FF, dhbuf + i + 2);
1621                 for (i = 0; i < TR_ALEN; i++)
1622                         writeb(0, dhbuf + i + TR_ALEN + 2);
1623                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1624                 return;
1625         }
1626         /*
1627          *    the token ring packet is copied from sk_buff to the adapter
1628          *    buffer identified in the command data received with the interrupt.
1629          */
1630         writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1631         writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1632         src_len=ti->current_skb->len;
1633         src_offset=0;
1634         dhb=dhb_base;
1635         while(1) {
1636                 if (ti->page_mask) {
1637                         dhb_page=(dhb >> 8) & ti->page_mask;
1638                         dhb=dhb & ~(ti->page_mask << 8);
1639                         dhb_len=0x4000-dhb; /* remaining size of this page */
1640                 }
1641                 dhbuf = ti->sram_virt + dhb;
1642                 SET_PAGE(dhb_page);
1643                 if (src_len > dhb_len) {
1644                         memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1645                                         dhb_len);
1646                         src_len -= dhb_len;
1647                         src_offset += dhb_len;
1648                         dhb_base+=dhb_len;
1649                         dhb=dhb_base;
1650                         continue;
1651                 }
1652                 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1653                 break;
1654         }
1655         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1656         ti->tr_stats.tx_bytes += ti->current_skb->len;
1657         dev_kfree_skb_irq(ti->current_skb);
1658         ti->current_skb = NULL;
1659         netif_wake_queue(dev);
1660         if (ti->readlog_pending)
1661                 ibmtr_readlog(dev);
1662 }                               /*tr_tx */
1663
1664 /*****************************************************************************/
1665
1666
1667 #define RECEIVE_BUFFER_OFST     6
1668 #define LAN_HDR_LENGTH_OFST     8
1669 #define DLC_HDR_LENGTH_OFST     9
1670
1671 #define DSAP_OFST               0
1672 #define SSAP_OFST               1
1673 #define LLC_OFST                2
1674 #define PROTID_OFST             3
1675 #define ETHERTYPE_OFST          6
1676
1677 static void tr_rx(struct net_device *dev)
1678 {
1679         struct tok_info *ti = (struct tok_info *) dev->priv;
1680         __u32 rbuffer;
1681         void __iomem *rbuf, *rbufdata, *llc;
1682         __u8 rbuffer_page = 0;
1683         unsigned char *data;
1684         unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1685         unsigned char dlc_hdr_len;
1686         struct sk_buff *skb;
1687         unsigned int skb_size = 0;
1688         int IPv4_p = 0;
1689         unsigned int chksum = 0;
1690         struct iphdr *iph;
1691         struct arb_rec_req rarb;
1692
1693         SET_PAGE(ti->arb_page);
1694         memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1695         rbuffer = ntohs(rarb.rec_buf_addr) ;
1696         rbuf = map_address(ti, rbuffer, &rbuffer_page);
1697
1698         SET_PAGE(ti->asb_page);
1699
1700         if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1701
1702         writeb(REC_DATA, ti->asb + COMMAND_OFST);
1703         writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1704         writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1705
1706         lan_hdr_len = rarb.lan_hdr_len;
1707         if (lan_hdr_len > sizeof(struct trh_hdr)) {
1708                 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1709                 return;
1710         }                       /*BMS I added this above just to be very safe */
1711         dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1712         hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1713
1714         SET_PAGE(rbuffer_page);
1715         llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1716
1717 #if TR_VERBOSE
1718         DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1719         (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1720         DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1721                 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1722         DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1723                 "ethertype: %04X\n",
1724                 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1725                 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1726                 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1727                 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1728 #endif
1729         if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1730                 SET_PAGE(ti->asb_page);
1731                 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1732                 ti->tr_stats.rx_dropped++;
1733                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1734                 return;
1735         }
1736         length = ntohs(rarb.frame_len);
1737         if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1738            readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1739                 length >= hdr_len)      IPv4_p = 1;
1740 #if TR_VERBOSE
1741 #define SADDR_OFST      8
1742 #define DADDR_OFST      2
1743
1744         if (!IPv4_p) {
1745
1746                 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1747
1748                 DPRINTK("Probably non-IP frame received.\n");
1749                 DPRINTK("ssap: %02X dsap: %02X "
1750                         "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
1751                         "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
1752                         readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1753                         readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
1754                         readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
1755                         readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
1756                         readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
1757                         readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
1758                         readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
1759         }
1760 #endif
1761
1762         /*BMS handle the case she comes in with few hops but leaves with many */
1763         skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1764
1765         if (!(skb = dev_alloc_skb(skb_size))) {
1766                 DPRINTK("out of memory. frame dropped.\n");
1767                 ti->tr_stats.rx_dropped++;
1768                 SET_PAGE(ti->asb_page);
1769                 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1770                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1771                 return;
1772         }
1773         /*BMS again, if she comes in with few but leaves with many */
1774         skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1775         skb_put(skb, length);
1776         skb->dev = dev;
1777         data = skb->data;
1778         rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1779         rbufdata = rbuf + offsetof(struct rec_buf, data);
1780
1781         if (IPv4_p) {
1782                 /* Copy the headers without checksumming */
1783                 memcpy_fromio(data, rbufdata, hdr_len);
1784
1785                 /* Watch for padded packets and bogons */
1786                 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1787                 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1788                 length -= hdr_len;
1789                 if ((ip_len <= length) && (ip_len > 7))
1790                         length = ip_len;
1791                 data += hdr_len;
1792                 rbuffer_len -= hdr_len;
1793                 rbufdata += hdr_len;
1794         }
1795         /* Copy the payload... */
1796 #define BUFFER_POINTER_OFST     2
1797 #define BUFFER_LENGTH_OFST      6
1798         for (;;) {
1799                 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1800                         DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1801                                                 length,rbuffer_len);
1802                 if (IPv4_p)
1803                         chksum=csum_partial_copy_nocheck((void*)rbufdata,
1804                             data,length<rbuffer_len?length:rbuffer_len,chksum);
1805                 else
1806                         memcpy_fromio(data, rbufdata, rbuffer_len);
1807                 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1808                 if (!rbuffer)
1809                         break;
1810                 rbuffer -= 2;
1811                 length -= rbuffer_len;
1812                 data += rbuffer_len;
1813                 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1814                 SET_PAGE(rbuffer_page);
1815                 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1816                 rbufdata = rbuf + offsetof(struct rec_buf, data);
1817         }
1818
1819         SET_PAGE(ti->asb_page);
1820         writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1821
1822         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1823
1824         ti->tr_stats.rx_bytes += skb->len;
1825         ti->tr_stats.rx_packets++;
1826
1827         skb->protocol = tr_type_trans(skb, dev);
1828         if (IPv4_p) {
1829                 skb->csum = chksum;
1830                 skb->ip_summed = 1;
1831         }
1832         netif_rx(skb);
1833         dev->last_rx = jiffies;
1834 }                               /*tr_rx */
1835
1836 /*****************************************************************************/
1837
1838 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1839 {
1840         tmr->expires = jiffies + TR_RETRY_INTERVAL;
1841         tmr->data = (unsigned long) dev;
1842         tmr->function = tok_rerun;
1843         init_timer(tmr);
1844         add_timer(tmr);
1845 }
1846
1847 /*****************************************************************************/
1848
1849 void tok_rerun(unsigned long dev_addr){
1850
1851         struct net_device *dev = (struct net_device *)dev_addr;
1852         struct tok_info *ti = (struct tok_info *) dev->priv;
1853
1854         if ( ti->open_action == RESTART){
1855                 ti->do_tok_int = FIRST_INT;
1856                 outb(0, dev->base_addr + ADAPTRESETREL);
1857 #ifdef ENABLE_PAGING
1858                 if (ti->page_mask)
1859                         writeb(SRPR_ENABLE_PAGING,
1860                                 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1861 #endif
1862
1863                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1864         } else
1865                 tok_open_adapter(dev_addr);
1866 }
1867
1868 /*****************************************************************************/
1869
1870 static void ibmtr_readlog(struct net_device *dev)
1871 {
1872         struct tok_info *ti;
1873
1874         ti = (struct tok_info *) dev->priv;
1875
1876         ti->readlog_pending = 0;
1877         SET_PAGE(ti->srb_page);
1878         writeb(DIR_READ_LOG, ti->srb);
1879         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1880         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1881
1882         netif_stop_queue(dev);
1883
1884 }
1885
1886 /*****************************************************************************/
1887
1888 /* tok_get_stats():  Basically a scaffold routine which will return
1889    the address of the tr_statistics structure associated with
1890    this device -- the tr.... structure is an ethnet look-alike
1891    so at least for this iteration may suffice.   */
1892
1893 static struct net_device_stats *tok_get_stats(struct net_device *dev)
1894 {
1895
1896         struct tok_info *toki;
1897         toki = (struct tok_info *) dev->priv;
1898         return (struct net_device_stats *) &toki->tr_stats;
1899 }
1900
1901 /*****************************************************************************/
1902
1903 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1904 {
1905         struct tok_info *ti = (struct tok_info *) dev->priv;
1906
1907         if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1908                 return -EINVAL;
1909         if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1910                 return -EINVAL;
1911         dev->mtu = mtu;
1912         return 0;
1913 }
1914
1915 /*****************************************************************************/
1916 #ifdef MODULE
1917
1918 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1919 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1920 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1921 static int irq[IBMTR_MAX_ADAPTERS];
1922 static int mem[IBMTR_MAX_ADAPTERS];
1923
1924 MODULE_LICENSE("GPL");
1925
1926 module_param_array(io, int, NULL, 0);
1927 module_param_array(irq, int, NULL, 0);
1928 module_param_array(mem, int, NULL, 0);
1929
1930 static int __init ibmtr_init(void)
1931 {
1932         int i;
1933         int count=0;
1934
1935         find_turbo_adapters(io);
1936
1937         for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1938                 struct net_device *dev;
1939                 irq[i] = 0;
1940                 mem[i] = 0;
1941                 dev = alloc_trdev(sizeof(struct tok_info));
1942                 if (dev == NULL) {
1943                         if (i == 0)
1944                                 return -ENOMEM;
1945                         break;
1946                 }
1947                 dev->base_addr = io[i];
1948                 dev->irq = irq[i];
1949                 dev->mem_start = mem[i];
1950
1951                 if (ibmtr_probe_card(dev)) {
1952                         free_netdev(dev);
1953                         continue;
1954                 }
1955                 dev_ibmtr[i] = dev;
1956                 count++;
1957         }
1958         if (count) return 0;
1959         printk("ibmtr: register_netdev() returned non-zero.\n");
1960         return -EIO;
1961 }
1962 module_init(ibmtr_init);
1963
1964 static void __exit ibmtr_cleanup(void)
1965 {
1966         int i;
1967
1968         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1969                 if (!dev_ibmtr[i])
1970                         continue;
1971                 unregister_netdev(dev_ibmtr[i]);
1972                 ibmtr_cleanup_card(dev_ibmtr[i]);
1973                 free_netdev(dev_ibmtr[i]);
1974         }
1975 }
1976 module_exit(ibmtr_cleanup);
1977 #endif