drivers/sn/ioc3.c

   1 /*
   2  * SGI IOC3 master driver and IRQ demuxer
   3  *
   4  * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
   5  * Heavily based on similar work by:
   6  *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
   7  *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
   8  */
   9
  10 #include <linux/config.h>
  11 #include <linux/errno.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/delay.h>
  17 #include <linux/ioc3.h>
  18 #include <linux/rwsem.h>
  19
  20 #define IOC3_PCI_SIZE 0x100000
  21
  22 static LIST_HEAD(ioc3_devices);
  23 static int ioc3_counter;
  24 static DECLARE_RWSEM(ioc3_devices_rwsem);
  25
  26 static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
  27 static struct ioc3_submodule *ioc3_ethernet;
  28 static rwlock_t ioc3_submodules_lock = RW_LOCK_UNLOCKED;
  29
  30 /* NIC probing code */
  31
  32 #define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */
  33
  34 static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
  35 {
  36         return (pulse << 10) | (sample << 2);
  37 }
  38
  39 static int nic_wait(struct ioc3_driver_data *idd)
  40 {
  41         volatile unsigned mcr;
  42
  43         do {
  44                 mcr = (volatile unsigned)idd->vma->mcr;
  45         } while (!(mcr & 2));
  46
  47         return mcr & 1;
  48 }
  49
  50 static int nic_reset(struct ioc3_driver_data *idd)
  51 {
  52         int presence;
  53         unsigned long flags;
  54
  55         local_irq_save(flags);
  56         idd->vma->mcr = mcr_pack(500, 65);
  57         presence = nic_wait(idd);
  58         local_irq_restore(flags);
  59
  60         udelay(500);
  61
  62         return presence;
  63 }
  64
  65 static inline int nic_read_bit(struct ioc3_driver_data *idd)
  66 {
  67         int result;
  68         unsigned long flags;
  69
  70         local_irq_save(flags);
  71         idd->vma->mcr = mcr_pack(6, 13);
  72         result = nic_wait(idd);
  73         local_irq_restore(flags);
  74
  75         udelay(500);
  76
  77         return result;
  78 }
  79
  80 static inline void nic_write_bit(struct ioc3_driver_data *idd, int bit)
  81 {
  82         if (bit)
  83                 idd->vma->mcr = mcr_pack(6, 110);
  84         else
  85                 idd->vma->mcr = mcr_pack(80, 30);
  86
  87         nic_wait(idd);
  88 }
  89
  90 static unsigned nic_read_byte(struct ioc3_driver_data *idd)
  91 {
  92         unsigned result = 0;
  93         int i;
  94
  95         for (i = 0; i < 8; i++)
  96                 result = (result >> 1) | (nic_read_bit(idd) << 7);
  97
  98         return result;
  99 }
 100
 101 static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
 102 {
 103         int i, bit;
 104
 105         for (i = 8; i; i--) {
 106                 bit = byte & 1;
 107                 byte >>= 1;
 108
 109                 nic_write_bit(idd, bit);
 110         }
 111 }
 112
 113 static unsigned long
 114 nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
 115 {
 116         int a, b, index, disc;
 117
 118         nic_reset(idd);
 119
 120         /* Search ROM.  */
 121         nic_write_byte(idd, 0xF0);
 122
 123         /* Algorithm from ``Book of iButton Standards''.  */
 124         for (index = 0, disc = 0; index < 64; index++) {
 125                 a = nic_read_bit(idd);
 126                 b = nic_read_bit(idd);
 127
 128                 if (a && b) {
 129                         printk(KERN_WARNING "IOC3 NIC search failed.\n");
 130                         *last = 0;
 131                         return 0;
 132                 }
 133
 134                 if (!a && !b) {
 135                         if (index == *last) {
 136                                 addr |= 1UL << index;
 137                         } else if (index > *last) {
 138                                 addr &= ~(1UL << index);
 139                                 disc = index;
 140                         } else if ((addr & (1UL << index)) == 0)
 141                                 disc = index;
 142                         nic_write_bit(idd, (addr>>index)&1);
 143                         continue;
 144                 } else {
 145                         if (a)
 146                                 addr |= 1UL << index;
 147                         else
 148                                 addr &= ~(1UL << index);
 149                         nic_write_bit(idd, a);
 150                         continue;
 151                 }
 152         }
 153         *last = disc;
 154         return addr;
 155 }
 156
 157 static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
 158 {
 159         int index;
 160
 161         nic_reset(idd);
 162         nic_write_byte(idd, 0xF0);
 163         for (index = 0; index < 64; index++) {
 164                 nic_read_bit(idd);
 165                 nic_read_bit(idd);
 166                 nic_write_bit(idd, (addr>>index)&1);
 167         }
 168 }
 169
 170 static void crc16_byte(unsigned int *crc, unsigned char db)
 171 {
 172         int i;
 173
 174         for(i=0;i<8;i++) {
 175                 *crc <<= 1;
 176                 if((db^(*crc>>16)) & 1)
 177                         *crc ^= 0x8005;
 178                 db >>= 1;
 179         }
 180         *crc &= 0xFFFF;
 181 }
 182
 183 static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
 184 {
 185         while(size--)
 186                 crc16_byte(&crc, *(dbs++));
 187         return crc;
 188 }
 189
 190 static void crc8_byte(unsigned int *crc, unsigned char db)
 191 {
 192         int i,f;
 193
 194         for(i=0;i<8;i++) {
 195                 f = (*crc ^ db) & 1;
 196                 *crc >>= 1;
 197                 db >>= 1;
 198                 if(f)
 199                         *crc ^= 0x8c;
 200         }
 201         *crc &= 0xff;
 202 }
 203
 204 static unsigned int crc8_addr(unsigned long addr)
 205 {
 206         int i;
 207         unsigned int crc = 0x00;
 208
 209         for(i=0;i<8;i++)
 210                 crc8_byte(&crc, addr>>(i<<3));
 211         return crc;
 212 }
 213
 214 static void
 215 read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
 216                         unsigned char *redir, unsigned char *data)
 217 {
 218         int loops = 16, i;
 219
 220         while(redir[page] != 0xFF) {
 221                 page = redir[page]^0xFF;
 222                 loops--;
 223                 if(loops<0) {
 224                         printk(KERN_ERR "IOC3: NIC circular redirection\n");
 225                         return;
 226                 }
 227         }
 228         loops = 3;
 229         while(loops>0) {
 230                 nic_addr(idd, addr);
 231                 nic_write_byte(idd, 0xF0);
 232                 nic_write_byte(idd, (page << 5) & 0xE0);
 233                 nic_write_byte(idd, (page >> 3) & 0x1F);
 234                 for(i=0;i<0x20;i++)
 235                         data[i] = nic_read_byte(idd);
 236                 if(crc16_area(data, 0x20, 0x0000) == 0x800d)
 237                         return;
 238                 loops--;
 239         }
 240         printk(KERN_ERR "IOC3: CRC error in data page\n");
 241         for(i=0;i<0x20;i++)
 242                 data[i] = 0x00;
 243 }
 244
 245 static void
 246 read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
 247                                          unsigned char *redir)
 248 {
 249         int i,j,loops = 3,crc_ok;
 250         unsigned int crc;
 251
 252         while(loops>0) {
 253                 crc_ok = 1;
 254                 nic_addr(idd, addr);
 255                 nic_write_byte(idd, 0xAA);
 256                 nic_write_byte(idd, 0x00);
 257                 nic_write_byte(idd, 0x01);
 258                 for(i=0;i<64;i+=8) {
 259                         for(j=0;j<8;j++)
 260                                 redir[i+j] = nic_read_byte(idd);
 261                         crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
 262                         crc16_byte(&crc, nic_read_byte(idd));
 263                         crc16_byte(&crc, nic_read_byte(idd));
 264                         if(crc != 0x800d)
 265                                 crc_ok = 0;
 266                 }
 267                 if(crc_ok)
 268                         return;
 269                 loops--;
 270         }
 271         printk(KERN_ERR "IOC3: CRC error in redirection page\n");
 272         for(i=0;i<64;i++)
 273                 redir[i] = 0xFF;
 274 }
 275
 276 static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
 277 {
 278         unsigned char redir[64];
 279         unsigned char data[64],part[32];
 280         int i,j;
 281
 282         /* read redirections */
 283         read_redir_map(idd, addr, redir);
 284         /* read data pages */
 285         read_redir_page(idd, addr, 0, redir, data);
 286         read_redir_page(idd, addr, 1, redir, data+32);
 287         /* assemble the part # */
 288         j=0;
 289         for(i=0;i<19;i++)
 290                 if(data[i+11] != ' ')
 291                         part[j++] = data[i+11];
 292         for(i=0;i<6;i++)
 293                 if(data[i+32] != ' ')
 294                         part[j++] = data[i+32];
 295         part[j] = 0;
 296         /* skip Octane power supplies */
 297         if(!strncmp(part, "060-0035-", 9))
 298                 return;
 299         if(!strncmp(part, "060-0038-", 9))
 300                 return;
 301         strcpy(idd->nic_part, part);
 302         /* assemble the serial # */
 303         j=0;
 304         for(i=0;i<10;i++)
 305                 if(data[i+1] != ' ')
 306                         idd->nic_serial[j++] = data[i+1];
 307         idd->nic_serial[j] = 0;
 308 }
 309
 310 static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
 311 {
 312         int i, loops = 3;
 313         unsigned char data[13];
 314
 315         while(loops>0) {
 316                 nic_addr(idd, addr);
 317                 nic_write_byte(idd, 0xF0);
 318                 nic_write_byte(idd, 0x00);
 319                 nic_write_byte(idd, 0x00);
 320                 nic_read_byte(idd);
 321                 for(i=0;i<13;i++)
 322                         data[i] = nic_read_byte(idd);
 323                 if(crc16_area(data, 13, 0x0000) == 0x800d) {
 324                         for(i=10;i>4;i--)
 325                                 idd->nic_mac[10-i] = data[i];
 326                         return;
 327                 }
 328                 loops--;
 329         }
 330         printk(KERN_ERR "IOC3: CRC error in MAC address\n");
 331         for(i=0;i<6;i++)
 332                 idd->nic_mac[i] = 0x00;
 333 }
 334
 335 static void probe_nic(struct ioc3_driver_data *idd)
 336 {
 337         int save = 0, loops = 3;
 338         unsigned long first, addr;
 339
 340         idd->vma->gpcr_s = GPCR_MLAN_EN;
 341
 342         while(loops>0) {
 343                 idd->nic_part[0] = 0;
 344                 idd->nic_serial[0] = 0;
 345                 addr = first = nic_find(idd, &save, 0);
 346                 if(!first)
 347                         return;
 348                 while(1) {
 349                         if(crc8_addr(addr))
 350                                 break;
 351                         else {
 352                                 switch(addr & 0xFF) {
 353                                 case 0x0B:
 354                                         read_nic(idd, addr);
 355                                         break;
 356                                 case 0x09:
 357                                 case 0x89:
 358                                 case 0x91:
 359                                         read_mac(idd, addr);
 360                                         break;
 361                                 }
 362                         }
 363                         addr = nic_find(idd, &save, addr);
 364                         if(addr == first)
 365                                 return;
 366                 }
 367                 loops--;
 368         }
 369         printk(KERN_ERR "IOC3: CRC error in NIC address\n");
 370 }
 371
 372 /* Interrupts */
 373
 374 static inline void
 375 write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
 376 {
 377         unsigned long flags;
 378
 379         spin_lock_irqsave(&idd->ir_lock, flags);
 380         switch (which) {
 381         case IOC3_W_IES:
 382                 writel(val, &idd->vma->sio_ies);
 383                 break;
 384         case IOC3_W_IEC:
 385                 writel(val, &idd->vma->sio_iec);
 386                 break;
 387         }
 388         spin_unlock_irqrestore(&idd->ir_lock, flags);
 389 }
 390 static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
 391 {
 392         unsigned long flag;
 393         uint32_t intrs = 0;
 394
 395         spin_lock_irqsave(&idd->ir_lock, flag);
 396         intrs = readl(&idd->vma->sio_ir);
 397         intrs &= readl(&idd->vma->sio_ies);
 398         spin_unlock_irqrestore(&idd->ir_lock, flag);
 399         return intrs;
 400 }
 401
 402 static irqreturn_t ioc3_intr_io(int irq, void *arg, struct pt_regs *regs)
 403 {
 404         unsigned long flags;
 405         struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
 406         int handled = 1, id;
 407         unsigned int pending;
 408
 409         read_lock_irqsave(&ioc3_submodules_lock, flags);
 410
 411         if(idd->dual_irq && idd->vma->eisr) {
 412                 /* send Ethernet IRQ to the driver */
 413                 if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
 414                                                 ioc3_ethernet->intr) {
 415                         handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
 416                                                         idd, 0, regs);
 417                 }
 418         }
 419         pending = get_pending_intrs(idd);       /* look at the IO IRQs */
 420
 421         for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
 422                 if(idd->active[id] && ioc3_submodules[id]
 423                                 && (pending & ioc3_submodules[id]->irq_mask)
 424                                 && ioc3_submodules[id]->intr) {
 425                         write_ireg(idd, ioc3_submodules[id]->irq_mask,
 426                                                         IOC3_W_IEC);
 427                         if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
 428                                    idd, pending & ioc3_submodules[id]->irq_mask,
 429                                         regs))
 430                                 pending &= ~ioc3_submodules[id]->irq_mask;
 431                         if (ioc3_submodules[id]->reset_mask)
 432                                 write_ireg(idd, ioc3_submodules[id]->irq_mask,
 433                                                         IOC3_W_IES);
 434                 }
 435         }
 436         read_unlock_irqrestore(&ioc3_submodules_lock, flags);
 437         if(pending) {
 438                 printk(KERN_WARNING
 439                   "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
 440                 write_ireg(idd, pending, IOC3_W_IEC);
 441                 handled = 1;
 442         }
 443         return handled?IRQ_HANDLED:IRQ_NONE;
 444 }
 445
 446 static irqreturn_t ioc3_intr_eth(int irq, void *arg, struct pt_regs *regs)
 447 {
 448         unsigned long flags;
 449         struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
 450         int handled = 1;
 451
 452         if(!idd->dual_irq)
 453                 return IRQ_NONE;
 454         read_lock_irqsave(&ioc3_submodules_lock, flags);
 455         if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
 456                                 && ioc3_ethernet->intr)
 457                 handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0,
 458                                                                 regs);
 459         read_unlock_irqrestore(&ioc3_submodules_lock, flags);
 460         return handled?IRQ_HANDLED:IRQ_NONE;
 461 }
 462
 463 void ioc3_enable(struct ioc3_submodule *is,
 464                                 struct ioc3_driver_data *idd, unsigned int irqs)
 465 {
 466         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
 467 }
 468
 469 void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
 470                                 unsigned int irqs)
 471 {
 472         writel(irqs & is->irq_mask, &idd->vma->sio_ir);
 473 }
 474
 475 void ioc3_disable(struct ioc3_submodule *is,
 476                                 struct ioc3_driver_data *idd, unsigned int irqs)
 477 {
 478         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
 479 }
 480
 481 void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
 482 {
 483         unsigned long flags;
 484         spin_lock_irqsave(&idd->gpio_lock, flags);
 485         writel(val, &idd->vma->gpcr_s);
 486         spin_unlock_irqrestore(&idd->gpio_lock, flags);
 487 }
 488
 489 /* Keep it simple, stupid! */
 490 static int find_slot(void **tab, int max)
 491 {
 492         int i;
 493         for(i=0;i<max;i++)
 494                 if(!(tab[i]))
 495                         return i;
 496         return -1;
 497 }
 498
 499 /* Register an IOC3 submodule */
 500 int ioc3_register_submodule(struct ioc3_submodule *is)
 501 {
 502         struct ioc3_driver_data *idd;
 503         int alloc_id;
 504         unsigned long flags;
 505
 506         write_lock_irqsave(&ioc3_submodules_lock, flags);
 507         alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
 508         if(alloc_id != -1) {
 509                 ioc3_submodules[alloc_id] = is;
 510                 if(is->ethernet) {
 511                         if(ioc3_ethernet==NULL)
 512                                 ioc3_ethernet=is;
 513                         else
 514                                 printk(KERN_WARNING
 515                                   "IOC3 Ethernet module already registered!\n");
 516                 }
 517         }
 518         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
 519
 520         if(alloc_id == -1) {
 521                 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
 522                 return -ENOMEM;
 523         }
 524
 525         is->id=alloc_id;
 526
 527         /* Initialize submodule for each IOC3 */
 528         if (!is->probe)
 529                 return 0;
 530
 531         down_read(&ioc3_devices_rwsem);
 532         list_for_each_entry(idd, &ioc3_devices, list) {
 533                 /* set to 1 for IRQs in probe */
 534                 idd->active[alloc_id] = 1;
 535                 idd->active[alloc_id] = !is->probe(is, idd);
 536         }
 537         up_read(&ioc3_devices_rwsem);
 538
 539         return 0;
 540 }
 541
 542 /* Unregister an IOC3 submodule */
 543 void ioc3_unregister_submodule(struct ioc3_submodule *is)
 544 {
 545         struct ioc3_driver_data *idd;
 546         unsigned long flags;
 547
 548         write_lock_irqsave(&ioc3_submodules_lock, flags);
 549         if(ioc3_submodules[is->id]==is)
 550                 ioc3_submodules[is->id]=NULL;
 551         else
 552                 printk(KERN_WARNING
 553                         "IOC3 submodule %s has wrong ID.\n",is->name);
 554         if(ioc3_ethernet==is)
 555                 ioc3_ethernet = NULL;
 556         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
 557
 558         /* Remove submodule for each IOC3 */
 559         down_read(&ioc3_devices_rwsem);
 560         list_for_each_entry(idd, &ioc3_devices, list)
 561                 if(idd->active[is->id]) {
 562                         if(is->remove)
 563                                 if(is->remove(is, idd))
 564                                         printk(KERN_WARNING
 565                                                "%s: IOC3 submodule %s remove failed "
 566                                                "for pci_dev %s.\n",
 567                                                __FUNCTION__, module_name(is->owner),
 568                                                pci_name(idd->pdev));
 569                         idd->active[is->id] = 0;
 570                         if(is->irq_mask)
 571                                 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
 572                 }
 573         up_read(&ioc3_devices_rwsem);
 574 }
 575
 576 /*********************
 577  * Device management *
 578  *********************/
 579
 580 static char *
 581 ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
 582                         "MENET 4", "CADduo", "Altix Serial"};
 583
 584 static int ioc3_class(struct ioc3_driver_data *idd)
 585 {
 586         int res = IOC3_CLASS_NONE;
 587         /* NIC-based logic */
 588         if(!strncmp(idd->nic_part, "030-0891-", 9))
 589                 res = IOC3_CLASS_BASE_IP30;
 590         if(!strncmp(idd->nic_part, "030-1155-", 9))
 591                 res = IOC3_CLASS_CADDUO;
 592         if(!strncmp(idd->nic_part, "030-1657-", 9))
 593                 res = IOC3_CLASS_SERIAL;
 594         if(!strncmp(idd->nic_part, "030-1664-", 9))
 595                 res = IOC3_CLASS_SERIAL;
 596         /* total random heuristics */
 597 #ifdef CONFIG_SGI_IP27
 598         if(!idd->nic_part[0])
 599                 res = IOC3_CLASS_BASE_IP27;
 600 #endif
 601         /* print educational message */
 602         printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
 603                         idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
 604         return res;
 605 }
 606 /* Adds a new instance of an IOC3 card */
 607 static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
 608 {
 609         struct ioc3_driver_data *idd;
 610         uint32_t pcmd;
 611         int ret, id;
 612
 613         /* Enable IOC3 and take ownership of it */
 614         if ((ret = pci_enable_device(pdev))) {
 615                 printk(KERN_WARNING
 616                        "%s: Failed to enable IOC3 device for pci_dev %s.\n",
 617                        __FUNCTION__, pci_name(pdev));
 618                 goto out;
 619         }
 620         pci_set_master(pdev);
 621
 622 #ifdef USE_64BIT_DMA
 623         ret = pci_set_dma_mask(pdev, 0xffffffffffffffffULL);
 624         if (!ret) {
 625                 ret = pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL);
 626                 if (ret < 0) {
 627                         printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
 628                                "for consistent allocations\n",
 629                                 __FUNCTION__);
 630                 }
 631         }
 632 #endif
 633
 634         /* Set up per-IOC3 data */
 635         idd = kmalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
 636         if (!idd) {
 637                 printk(KERN_WARNING
 638                        "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
 639                        __FUNCTION__, pci_name(pdev));
 640                 ret = -ENODEV;
 641                 goto out_idd;
 642         }
 643         memset(idd, 0, sizeof(struct ioc3_driver_data));
 644         spin_lock_init(&idd->ir_lock);
 645         spin_lock_init(&idd->gpio_lock);
 646         idd->pdev = pdev;
 647
 648         /* Map all IOC3 registers.  These are shared between subdevices
 649          * so the main IOC3 module manages them.
 650          */
 651         idd->pma = pci_resource_start(pdev, 0);
 652         if (!idd->pma) {
 653                 printk(KERN_WARNING
 654                        "%s: Unable to find IOC3 resource "
 655                        "for pci_dev %s.\n",
 656                        __FUNCTION__, pci_name(pdev));
 657                 ret = -ENODEV;
 658                 goto out_pci;
 659         }
 660         if (!request_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
 661                 printk(KERN_WARNING
 662                        "%s: Unable to request IOC3 region "
 663                        "for pci_dev %s.\n",
 664                        __FUNCTION__, pci_name(pdev));
 665                 ret = -ENODEV;
 666                 goto out_pci;
 667         }
 668         idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
 669         if (!idd->vma) {
 670                 printk(KERN_WARNING
 671                        "%s: Unable to remap IOC3 region "
 672                        "for pci_dev %s.\n",
 673                        __FUNCTION__, pci_name(pdev));
 674                 ret = -ENODEV;
 675                 goto out_misc_region;
 676         }
 677
 678         /* Track PCI-device specific data */
 679         pci_set_drvdata(pdev, idd);
 680         down_write(&ioc3_devices_rwsem);
 681         list_add(&idd->list, &ioc3_devices);
 682         idd->id = ioc3_counter++;
 683         up_write(&ioc3_devices_rwsem);
 684
 685         idd->gpdr_shadow = idd->vma->gpdr;
 686
 687         /* Read IOC3 NIC contents */
 688         probe_nic(idd);
 689
 690         /* Detect IOC3 class */
 691         idd->class = ioc3_class(idd);
 692
 693         /* Initialize IOC3 */
 694        pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
 695        pci_write_config_dword(pdev, PCI_COMMAND,
 696                                pcmd | PCI_COMMAND_MEMORY |
 697                                PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
 698                                PCI_SCR_DROP_MODE_EN);
 699
 700         write_ireg(idd, ~0, IOC3_W_IEC);
 701         writel(~0, &idd->vma->sio_ir);
 702
 703         /* Set up IRQs */
 704         if(idd->class == IOC3_CLASS_BASE_IP30
 705                                 || idd->class == IOC3_CLASS_BASE_IP27) {
 706                 writel(0, &idd->vma->eier);
 707                 writel(~0, &idd->vma->eisr);
 708
 709                 idd->dual_irq = 1;
 710                 if (!request_irq(pdev->irq, ioc3_intr_eth, SA_SHIRQ,
 711                                  "ioc3-eth", (void *)idd)) {
 712                         idd->irq_eth = pdev->irq;
 713                 } else {
 714                         printk(KERN_WARNING
 715                                "%s : request_irq fails for IRQ 0x%x\n ",
 716                                __FUNCTION__, pdev->irq);
 717                 }
 718                 if (!request_irq(pdev->irq+2, ioc3_intr_io, SA_SHIRQ,
 719                                  "ioc3-io", (void *)idd)) {
 720                         idd->irq_io = pdev->irq+2;
 721                 } else {
 722                         printk(KERN_WARNING
 723                                "%s : request_irq fails for IRQ 0x%x\n ",
 724                                __FUNCTION__, pdev->irq+2);
 725                 }
 726         } else {
 727                 if (!request_irq(pdev->irq, ioc3_intr_io, SA_SHIRQ,
 728                                  "ioc3", (void *)idd)) {
 729                         idd->irq_io = pdev->irq;
 730                 } else {
 731                         printk(KERN_WARNING
 732                                "%s : request_irq fails for IRQ 0x%x\n ",
 733                                __FUNCTION__, pdev->irq);
 734                 }
 735         }
 736
 737         /* Add this IOC3 to all submodules */
 738         read_lock(&ioc3_submodules_lock);
 739         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
 740                 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
 741                         idd->active[id] = 1;
 742                         idd->active[id] = !ioc3_submodules[id]->probe
 743                                                 (ioc3_submodules[id], idd);
 744                 }
 745         read_unlock(&ioc3_submodules_lock);
 746
 747         printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
 748
 749         return 0;
 750
 751 out_misc_region:
 752         release_region(idd->pma, IOC3_PCI_SIZE);
 753 out_pci:
 754         kfree(idd);
 755 out_idd:
 756         pci_disable_device(pdev);
 757 out:
 758         return ret;
 759 }
 760
 761 /* Removes a particular instance of an IOC3 card. */
 762 static void ioc3_remove(struct pci_dev *pdev)
 763 {
 764         int id;
 765         struct ioc3_driver_data *idd;
 766
 767         idd = pci_get_drvdata(pdev);
 768
 769         /* Remove this IOC3 from all submodules */
 770         read_lock(&ioc3_submodules_lock);
 771         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
 772                 if(idd->active[id]) {
 773                         if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
 774                                 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
 775                                                                 idd))
 776                                         printk(KERN_WARNING
 777                                                "%s: IOC3 submodule 0x%s remove failed "
 778                                                "for pci_dev %s.\n",
 779                                                 __FUNCTION__,
 780                                                 module_name(ioc3_submodules[id]->owner),
 781                                                 pci_name(pdev));
 782                         idd->active[id] = 0;
 783                 }
 784         read_unlock(&ioc3_submodules_lock);
 785
 786         /* Clear and disable all IRQs */
 787         write_ireg(idd, ~0, IOC3_W_IEC);
 788         writel(~0, &idd->vma->sio_ir);
 789
 790         /* Release resources */
 791         free_irq(idd->irq_io, (void *)idd);
 792         if(idd->dual_irq)
 793                 free_irq(idd->irq_eth, (void *)idd);
 794         iounmap(idd->vma);
 795         release_region(idd->pma, IOC3_PCI_SIZE);
 796
 797         /* Disable IOC3 and relinquish */
 798         pci_disable_device(pdev);
 799
 800         /* Remove and free driver data */
 801         down_write(&ioc3_devices_rwsem);
 802         list_del(&idd->list);
 803         up_write(&ioc3_devices_rwsem);
 804         kfree(idd);
 805 }
 806
 807 static struct pci_device_id ioc3_id_table[] = {
 808         {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
 809         {0}
 810 };
 811
 812 static struct pci_driver ioc3_driver = {
 813         .name = "IOC3",
 814         .id_table = ioc3_id_table,
 815         .probe = ioc3_probe,
 816         .remove = ioc3_remove,
 817 };
 818
 819 MODULE_DEVICE_TABLE(pci, ioc3_id_table);
 820
 821 /*********************
 822  * Module management *
 823  *********************/
 824
 825 /* Module load */
 826 static int __devinit ioc3_init(void)
 827 {
 828         if (ia64_platform_is("sn2"))
 829                 return pci_register_driver(&ioc3_driver);
 830         return 0;
 831 }
 832
 833 /* Module unload */
 834 static void __devexit ioc3_exit(void)
 835 {
 836         pci_unregister_driver(&ioc3_driver);
 837 }
 838
 839 module_init(ioc3_init);
 840 module_exit(ioc3_exit);
 841
 842 MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
 843 MODULE_DESCRIPTION("PCI driver for SGI IOC3");
 844 MODULE_LICENSE("GPL");
 845
 846 EXPORT_SYMBOL_GPL(ioc3_register_submodule);
 847 EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
 848 EXPORT_SYMBOL_GPL(ioc3_ack);
 849 EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
 850 EXPORT_SYMBOL_GPL(ioc3_disable);
 851 EXPORT_SYMBOL_GPL(ioc3_enable);