drivers/sn/ioc3.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * SGI IOC3 master driver and IRQ demuxer
   4  *
   5  * Copyright (c) 2005 Stanislaw Skowronek <[email protected]>
   6  * Heavily based on similar work by:
   7  *   Brent Casavant <[email protected]> - IOC4 master driver
   8  *   Pat Gefre <[email protected]> - IOC3 serial port IRQ demuxer
   9  */
  10
  11 #include <linux/errno.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/delay.h>
  18 #include <linux/ioc3.h>
  19 #include <linux/rwsem.h>
  20 #include <linux/slab.h>
  21
  22 #define IOC3_PCI_SIZE 0x100000
  23
  24 static LIST_HEAD(ioc3_devices);
  25 static int ioc3_counter;
  26 static DECLARE_RWSEM(ioc3_devices_rwsem);
  27
  28 static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
  29 static struct ioc3_submodule *ioc3_ethernet;
  30 static DEFINE_RWLOCK(ioc3_submodules_lock);
  31
  32 /* NIC probing code */
  33
  34 #define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */
  35
  36 static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
  37 {
  38         return (pulse << 10) | (sample << 2);
  39 }
  40
  41 static int nic_wait(struct ioc3_driver_data *idd)
  42 {
  43         unsigned mcr;
  44
  45         do {
  46                 mcr = readl(&idd->vma->mcr);
  47         } while (!(mcr & 2));
  48
  49         return mcr & 1;
  50 }
  51
  52 static int nic_reset(struct ioc3_driver_data *idd)
  53 {
  54         int presence;
  55         unsigned long flags;
  56
  57         local_irq_save(flags);
  58         writel(mcr_pack(500, 65), &idd->vma->mcr);
  59         presence = nic_wait(idd);
  60         local_irq_restore(flags);
  61
  62         udelay(500);
  63
  64         return presence;
  65 }
  66
  67 static int nic_read_bit(struct ioc3_driver_data *idd)
  68 {
  69         int result;
  70         unsigned long flags;
  71
  72         local_irq_save(flags);
  73         writel(mcr_pack(6, 13), &idd->vma->mcr);
  74         result = nic_wait(idd);
  75         local_irq_restore(flags);
  76
  77         udelay(500);
  78
  79         return result;
  80 }
  81
  82 static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
  83 {
  84         if (bit)
  85                 writel(mcr_pack(6, 110), &idd->vma->mcr);
  86         else
  87                 writel(mcr_pack(80, 30), &idd->vma->mcr);
  88
  89         nic_wait(idd);
  90 }
  91
  92 static unsigned nic_read_byte(struct ioc3_driver_data *idd)
  93 {
  94         unsigned result = 0;
  95         int i;
  96
  97         for (i = 0; i < 8; i++)
  98                 result = (result >> 1) | (nic_read_bit(idd) << 7);
  99
 100         return result;
 101 }
 102
 103 static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
 104 {
 105         int i, bit;
 106
 107         for (i = 8; i; i--) {
 108                 bit = byte & 1;
 109                 byte >>= 1;
 110
 111                 nic_write_bit(idd, bit);
 112         }
 113 }
 114
 115 static unsigned long
 116 nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
 117 {
 118         int a, b, index, disc;
 119
 120         nic_reset(idd);
 121
 122         /* Search ROM.  */
 123         nic_write_byte(idd, 0xF0);
 124
 125         /* Algorithm from ``Book of iButton Standards''.  */
 126         for (index = 0, disc = 0; index < 64; index++) {
 127                 a = nic_read_bit(idd);
 128                 b = nic_read_bit(idd);
 129
 130                 if (a && b) {
 131                         printk(KERN_WARNING "IOC3 NIC search failed.\n");
 132                         *last = 0;
 133                         return 0;
 134                 }
 135
 136                 if (!a && !b) {
 137                         if (index == *last) {
 138                                 addr |= 1UL << index;
 139                         } else if (index > *last) {
 140                                 addr &= ~(1UL << index);
 141                                 disc = index;
 142                         } else if ((addr & (1UL << index)) == 0)
 143                                 disc = index;
 144                         nic_write_bit(idd, (addr>>index)&1);
 145                         continue;
 146                 } else {
 147                         if (a)
 148                                 addr |= 1UL << index;
 149                         else
 150                                 addr &= ~(1UL << index);
 151                         nic_write_bit(idd, a);
 152                         continue;
 153                 }
 154         }
 155         *last = disc;
 156         return addr;
 157 }
 158
 159 static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
 160 {
 161         int index;
 162
 163         nic_reset(idd);
 164         nic_write_byte(idd, 0xF0);
 165         for (index = 0; index < 64; index++) {
 166                 nic_read_bit(idd);
 167                 nic_read_bit(idd);
 168                 nic_write_bit(idd, (addr>>index)&1);
 169         }
 170 }
 171
 172 static void crc16_byte(unsigned int *crc, unsigned char db)
 173 {
 174         int i;
 175
 176         for(i=0;i<8;i++) {
 177                 *crc <<= 1;
 178                 if((db^(*crc>>16)) & 1)
 179                         *crc ^= 0x8005;
 180                 db >>= 1;
 181         }
 182         *crc &= 0xFFFF;
 183 }
 184
 185 static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
 186 {
 187         while(size--)
 188                 crc16_byte(&crc, *(dbs++));
 189         return crc;
 190 }
 191
 192 static void crc8_byte(unsigned int *crc, unsigned char db)
 193 {
 194         int i,f;
 195
 196         for(i=0;i<8;i++) {
 197                 f = (*crc ^ db) & 1;
 198                 *crc >>= 1;
 199                 db >>= 1;
 200                 if(f)
 201                         *crc ^= 0x8c;
 202         }
 203         *crc &= 0xff;
 204 }
 205
 206 static unsigned int crc8_addr(unsigned long addr)
 207 {
 208         int i;
 209         unsigned int crc = 0x00;
 210
 211         for(i=0;i<8;i++)
 212                 crc8_byte(&crc, addr>>(i<<3));
 213         return crc;
 214 }
 215
 216 static void
 217 read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
 218                         unsigned char *redir, unsigned char *data)
 219 {
 220         int loops = 16, i;
 221
 222         while(redir[page] != 0xFF) {
 223                 page = redir[page]^0xFF;
 224                 loops--;
 225                 if(loops<0) {
 226                         printk(KERN_ERR "IOC3: NIC circular redirection\n");
 227                         return;
 228                 }
 229         }
 230         loops = 3;
 231         while(loops>0) {
 232                 nic_addr(idd, addr);
 233                 nic_write_byte(idd, 0xF0);
 234                 nic_write_byte(idd, (page << 5) & 0xE0);
 235                 nic_write_byte(idd, (page >> 3) & 0x1F);
 236                 for(i=0;i<0x20;i++)
 237                         data[i] = nic_read_byte(idd);
 238                 if(crc16_area(data, 0x20, 0x0000) == 0x800d)
 239                         return;
 240                 loops--;
 241         }
 242         printk(KERN_ERR "IOC3: CRC error in data page\n");
 243         for(i=0;i<0x20;i++)
 244                 data[i] = 0x00;
 245 }
 246
 247 static void
 248 read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
 249                                          unsigned char *redir)
 250 {
 251         int i,j,loops = 3,crc_ok;
 252         unsigned int crc;
 253
 254         while(loops>0) {
 255                 crc_ok = 1;
 256                 nic_addr(idd, addr);
 257                 nic_write_byte(idd, 0xAA);
 258                 nic_write_byte(idd, 0x00);
 259                 nic_write_byte(idd, 0x01);
 260                 for(i=0;i<64;i+=8) {
 261                         for(j=0;j<8;j++)
 262                                 redir[i+j] = nic_read_byte(idd);
 263                         crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
 264                         crc16_byte(&crc, nic_read_byte(idd));
 265                         crc16_byte(&crc, nic_read_byte(idd));
 266                         if(crc != 0x800d)
 267                                 crc_ok = 0;
 268                 }
 269                 if(crc_ok)
 270                         return;
 271                 loops--;
 272         }
 273         printk(KERN_ERR "IOC3: CRC error in redirection page\n");
 274         for(i=0;i<64;i++)
 275                 redir[i] = 0xFF;
 276 }
 277
 278 static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
 279 {
 280         unsigned char redir[64];
 281         unsigned char data[64],part[32];
 282         int i,j;
 283
 284         /* read redirections */
 285         read_redir_map(idd, addr, redir);
 286         /* read data pages */
 287         read_redir_page(idd, addr, 0, redir, data);
 288         read_redir_page(idd, addr, 1, redir, data+32);
 289         /* assemble the part # */
 290         j=0;
 291         for(i=0;i<19;i++)
 292                 if(data[i+11] != ' ')
 293                         part[j++] = data[i+11];
 294         for(i=0;i<6;i++)
 295                 if(data[i+32] != ' ')
 296                         part[j++] = data[i+32];
 297         part[j] = 0;
 298         /* skip Octane power supplies */
 299         if(!strncmp(part, "060-0035-", 9))
 300                 return;
 301         if(!strncmp(part, "060-0038-", 9))
 302                 return;
 303         strcpy(idd->nic_part, part);
 304         /* assemble the serial # */
 305         j=0;
 306         for(i=0;i<10;i++)
 307                 if(data[i+1] != ' ')
 308                         idd->nic_serial[j++] = data[i+1];
 309         idd->nic_serial[j] = 0;
 310 }
 311
 312 static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
 313 {
 314         int i, loops = 3;
 315         unsigned char data[13];
 316
 317         while(loops>0) {
 318                 nic_addr(idd, addr);
 319                 nic_write_byte(idd, 0xF0);
 320                 nic_write_byte(idd, 0x00);
 321                 nic_write_byte(idd, 0x00);
 322                 nic_read_byte(idd);
 323                 for(i=0;i<13;i++)
 324                         data[i] = nic_read_byte(idd);
 325                 if(crc16_area(data, 13, 0x0000) == 0x800d) {
 326                         for(i=10;i>4;i--)
 327                                 idd->nic_mac[10-i] = data[i];
 328                         return;
 329                 }
 330                 loops--;
 331         }
 332         printk(KERN_ERR "IOC3: CRC error in MAC address\n");
 333         for(i=0;i<6;i++)
 334                 idd->nic_mac[i] = 0x00;
 335 }
 336
 337 static void probe_nic(struct ioc3_driver_data *idd)
 338 {
 339         int save = 0, loops = 3;
 340         unsigned long first, addr;
 341
 342         writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
 343
 344         while(loops>0) {
 345                 idd->nic_part[0] = 0;
 346                 idd->nic_serial[0] = 0;
 347                 addr = first = nic_find(idd, &save, 0);
 348                 if(!first)
 349                         return;
 350                 while(1) {
 351                         if(crc8_addr(addr))
 352                                 break;
 353                         else {
 354                                 switch(addr & 0xFF) {
 355                                 case 0x0B:
 356                                         read_nic(idd, addr);
 357                                         break;
 358                                 case 0x09:
 359                                 case 0x89:
 360                                 case 0x91:
 361                                         read_mac(idd, addr);
 362                                         break;
 363                                 }
 364                         }
 365                         addr = nic_find(idd, &save, addr);
 366                         if(addr == first)
 367                                 return;
 368                 }
 369                 loops--;
 370         }
 371         printk(KERN_ERR "IOC3: CRC error in NIC address\n");
 372 }
 373
 374 /* Interrupts */
 375
 376 static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
 377 {
 378         unsigned long flags;
 379
 380         spin_lock_irqsave(&idd->ir_lock, flags);
 381         switch (which) {
 382         case IOC3_W_IES:
 383                 writel(val, &idd->vma->sio_ies);
 384                 break;
 385         case IOC3_W_IEC:
 386                 writel(val, &idd->vma->sio_iec);
 387                 break;
 388         }
 389         spin_unlock_irqrestore(&idd->ir_lock, flags);
 390 }
 391 static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
 392 {
 393         unsigned long flag;
 394         uint32_t intrs = 0;
 395
 396         spin_lock_irqsave(&idd->ir_lock, flag);
 397         intrs = readl(&idd->vma->sio_ir);
 398         intrs &= readl(&idd->vma->sio_ies);
 399         spin_unlock_irqrestore(&idd->ir_lock, flag);
 400         return intrs;
 401 }
 402
 403 static irqreturn_t ioc3_intr_io(int irq, void *arg)
 404 {
 405         unsigned long flags;
 406         struct ioc3_driver_data *idd = arg;
 407         int handled = 1, id;
 408         unsigned int pending;
 409
 410         read_lock_irqsave(&ioc3_submodules_lock, flags);
 411
 412         if(idd->dual_irq && readb(&idd->vma->eisr)) {
 413                 /* send Ethernet IRQ to the driver */
 414                 if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
 415                                                 ioc3_ethernet->intr) {
 416                         handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
 417                                                         idd, 0);
 418                 }
 419         }
 420         pending = get_pending_intrs(idd);       /* look at the IO IRQs */
 421
 422         for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
 423                 if(idd->active[id] && ioc3_submodules[id]
 424                                 && (pending & ioc3_submodules[id]->irq_mask)
 425                                 && ioc3_submodules[id]->intr) {
 426                         write_ireg(idd, ioc3_submodules[id]->irq_mask,
 427                                                         IOC3_W_IEC);
 428                         if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
 429                                    idd, pending & ioc3_submodules[id]->irq_mask))
 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)
 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         read_unlock_irqrestore(&ioc3_submodules_lock, flags);
 459         return handled?IRQ_HANDLED:IRQ_NONE;
 460 }
 461
 462 void ioc3_enable(struct ioc3_submodule *is,
 463                                 struct ioc3_driver_data *idd, unsigned int irqs)
 464 {
 465         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
 466 }
 467
 468 void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
 469                                 unsigned int irqs)
 470 {
 471         writel(irqs & is->irq_mask, &idd->vma->sio_ir);
 472 }
 473
 474 void ioc3_disable(struct ioc3_submodule *is,
 475                                 struct ioc3_driver_data *idd, unsigned int irqs)
 476 {
 477         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
 478 }
 479
 480 void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
 481 {
 482         unsigned long flags;
 483         spin_lock_irqsave(&idd->gpio_lock, flags);
 484         writel(val, &idd->vma->gpcr_s);
 485         spin_unlock_irqrestore(&idd->gpio_lock, flags);
 486 }
 487
 488 /* Keep it simple, stupid! */
 489 static int find_slot(void **tab, int max)
 490 {
 491         int i;
 492         for(i=0;i<max;i++)
 493                 if(!(tab[i]))
 494                         return i;
 495         return -1;
 496 }
 497
 498 /* Register an IOC3 submodule */
 499 int ioc3_register_submodule(struct ioc3_submodule *is)
 500 {
 501         struct ioc3_driver_data *idd;
 502         int alloc_id;
 503         unsigned long flags;
 504
 505         write_lock_irqsave(&ioc3_submodules_lock, flags);
 506         alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
 507         if(alloc_id != -1) {
 508                 ioc3_submodules[alloc_id] = is;
 509                 if(is->ethernet) {
 510                         if(ioc3_ethernet==NULL)
 511                                 ioc3_ethernet=is;
 512                         else
 513                                 printk(KERN_WARNING
 514                                   "IOC3 Ethernet module already registered!\n");
 515                 }
 516         }
 517         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
 518
 519         if(alloc_id == -1) {
 520                 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
 521                 return -ENOMEM;
 522         }
 523
 524         is->id=alloc_id;
 525
 526         /* Initialize submodule for each IOC3 */
 527         if (!is->probe)
 528                 return 0;
 529
 530         down_read(&ioc3_devices_rwsem);
 531         list_for_each_entry(idd, &ioc3_devices, list) {
 532                 /* set to 1 for IRQs in probe */
 533                 idd->active[alloc_id] = 1;
 534                 idd->active[alloc_id] = !is->probe(is, idd);
 535         }
 536         up_read(&ioc3_devices_rwsem);
 537
 538         return 0;
 539 }
 540
 541 /* Unregister an IOC3 submodule */
 542 void ioc3_unregister_submodule(struct ioc3_submodule *is)
 543 {
 544         struct ioc3_driver_data *idd;
 545         unsigned long flags;
 546
 547         write_lock_irqsave(&ioc3_submodules_lock, flags);
 548         if(ioc3_submodules[is->id]==is)
 549                 ioc3_submodules[is->id]=NULL;
 550         else
 551                 printk(KERN_WARNING
 552                         "IOC3 submodule %s has wrong ID.\n",is->name);
 553         if(ioc3_ethernet==is)
 554                 ioc3_ethernet = NULL;
 555         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
 556
 557         /* Remove submodule for each IOC3 */
 558         down_read(&ioc3_devices_rwsem);
 559         list_for_each_entry(idd, &ioc3_devices, list)
 560                 if(idd->active[is->id]) {
 561                         if(is->remove)
 562                                 if(is->remove(is, idd))
 563                                         printk(KERN_WARNING
 564                                                "%s: IOC3 submodule %s remove failed "
 565                                                "for pci_dev %s.\n",
 566                                                __func__, module_name(is->owner),
 567                                                pci_name(idd->pdev));
 568                         idd->active[is->id] = 0;
 569                         if(is->irq_mask)
 570                                 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
 571                 }
 572         up_read(&ioc3_devices_rwsem);
 573 }
 574
 575 /*********************
 576  * Device management *
 577  *********************/
 578
 579 static char *ioc3_class_names[] = { "unknown", "IP27 BaseIO", "IP30 system",
 580                         "MENET 1/2/3", "MENET 4", "CADduo", "Altix Serial" };
 581
 582 static int ioc3_class(struct ioc3_driver_data *idd)
 583 {
 584         int res = IOC3_CLASS_NONE;
 585         /* NIC-based logic */
 586         if(!strncmp(idd->nic_part, "030-0891-", 9))
 587                 res = IOC3_CLASS_BASE_IP30;
 588         if(!strncmp(idd->nic_part, "030-1155-", 9))
 589                 res = IOC3_CLASS_CADDUO;
 590         if(!strncmp(idd->nic_part, "030-1657-", 9))
 591                 res = IOC3_CLASS_SERIAL;
 592         if(!strncmp(idd->nic_part, "030-1664-", 9))
 593                 res = IOC3_CLASS_SERIAL;
 594         /* total random heuristics */
 595 #ifdef CONFIG_SGI_IP27
 596         if(!idd->nic_part[0])
 597                 res = IOC3_CLASS_BASE_IP27;
 598 #endif
 599         /* print educational message */
 600         printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
 601                         idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
 602         return res;
 603 }
 604 /* Adds a new instance of an IOC3 card */
 605 static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
 606 {
 607         struct ioc3_driver_data *idd;
 608         uint32_t pcmd;
 609         int ret, id;
 610
 611         /* Enable IOC3 and take ownership of it */
 612         if ((ret = pci_enable_device(pdev))) {
 613                 printk(KERN_WARNING
 614                        "%s: Failed to enable IOC3 device for pci_dev %s.\n",
 615                        __func__, pci_name(pdev));
 616                 goto out;
 617         }
 618         pci_set_master(pdev);
 619
 620 #ifdef USE_64BIT_DMA
 621         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 622         if (!ret) {
 623                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 624                 if (ret < 0) {
 625                         printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
 626                                "for consistent allocations\n",
 627                                 __func__);
 628                 }
 629         }
 630 #endif
 631
 632         /* Set up per-IOC3 data */
 633         idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
 634         if (!idd) {
 635                 printk(KERN_WARNING
 636                        "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
 637                        __func__, pci_name(pdev));
 638                 ret = -ENODEV;
 639                 goto out_idd;
 640         }
 641         spin_lock_init(&idd->ir_lock);
 642         spin_lock_init(&idd->gpio_lock);
 643         idd->pdev = pdev;
 644
 645         /* Map all IOC3 registers.  These are shared between subdevices
 646          * so the main IOC3 module manages them.
 647          */
 648         idd->pma = pci_resource_start(pdev, 0);
 649         if (!idd->pma) {
 650                 printk(KERN_WARNING
 651                        "%s: Unable to find IOC3 resource "
 652                        "for pci_dev %s.\n",
 653                        __func__, pci_name(pdev));
 654                 ret = -ENODEV;
 655                 goto out_pci;
 656         }
 657         if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
 658                 printk(KERN_WARNING
 659                        "%s: Unable to request IOC3 region "
 660                        "for pci_dev %s.\n",
 661                        __func__, pci_name(pdev));
 662                 ret = -ENODEV;
 663                 goto out_pci;
 664         }
 665         idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
 666         if (!idd->vma) {
 667                 printk(KERN_WARNING
 668                        "%s: Unable to remap IOC3 region "
 669                        "for pci_dev %s.\n",
 670                        __func__, pci_name(pdev));
 671                 ret = -ENODEV;
 672                 goto out_misc_region;
 673         }
 674
 675         /* Track PCI-device specific data */
 676         pci_set_drvdata(pdev, idd);
 677         down_write(&ioc3_devices_rwsem);
 678         list_add_tail(&idd->list, &ioc3_devices);
 679         idd->id = ioc3_counter++;
 680         up_write(&ioc3_devices_rwsem);
 681
 682         idd->gpdr_shadow = readl(&idd->vma->gpdr);
 683
 684         /* Read IOC3 NIC contents */
 685         probe_nic(idd);
 686
 687         /* Detect IOC3 class */
 688         idd->class = ioc3_class(idd);
 689
 690         /* Initialize IOC3 */
 691        pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
 692        pci_write_config_dword(pdev, PCI_COMMAND,
 693                                pcmd | PCI_COMMAND_MEMORY |
 694                                PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
 695                                PCI_SCR_DROP_MODE_EN);
 696
 697         write_ireg(idd, ~0, IOC3_W_IEC);
 698         writel(~0, &idd->vma->sio_ir);
 699
 700         /* Set up IRQs */
 701         if(idd->class == IOC3_CLASS_BASE_IP30
 702                                 || idd->class == IOC3_CLASS_BASE_IP27) {
 703                 writel(0, &idd->vma->eier);
 704                 writel(~0, &idd->vma->eisr);
 705
 706                 idd->dual_irq = 1;
 707                 if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED,
 708                                  "ioc3-eth", (void *)idd)) {
 709                         idd->irq_eth = pdev->irq;
 710                 } else {
 711                         printk(KERN_WARNING
 712                                "%s : request_irq fails for IRQ 0x%x\n ",
 713                                __func__, pdev->irq);
 714                 }
 715                 if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
 716                                  "ioc3-io", (void *)idd)) {
 717                         idd->irq_io = pdev->irq+2;
 718                 } else {
 719                         printk(KERN_WARNING
 720                                "%s : request_irq fails for IRQ 0x%x\n ",
 721                                __func__, pdev->irq+2);
 722                 }
 723         } else {
 724                 if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
 725                                  "ioc3", (void *)idd)) {
 726                         idd->irq_io = pdev->irq;
 727                 } else {
 728                         printk(KERN_WARNING
 729                                "%s : request_irq fails for IRQ 0x%x\n ",
 730                                __func__, pdev->irq);
 731                 }
 732         }
 733
 734         /* Add this IOC3 to all submodules */
 735         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
 736                 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
 737                         idd->active[id] = 1;
 738                         idd->active[id] = !ioc3_submodules[id]->probe
 739                                                 (ioc3_submodules[id], idd);
 740                 }
 741
 742         printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
 743
 744         return 0;
 745
 746 out_misc_region:
 747         release_mem_region(idd->pma, IOC3_PCI_SIZE);
 748 out_pci:
 749         kfree(idd);
 750 out_idd:
 751         pci_disable_device(pdev);
 752 out:
 753         return ret;
 754 }
 755
 756 /* Removes a particular instance of an IOC3 card. */
 757 static void ioc3_remove(struct pci_dev *pdev)
 758 {
 759         int id;
 760         struct ioc3_driver_data *idd;
 761
 762         idd = pci_get_drvdata(pdev);
 763
 764         /* Remove this IOC3 from all submodules */
 765         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
 766                 if(idd->active[id]) {
 767                         if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
 768                                 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
 769                                                                 idd))
 770                                         printk(KERN_WARNING
 771                                                "%s: IOC3 submodule 0x%s remove failed "
 772                                                "for pci_dev %s.\n",
 773                                                 __func__,
 774                                                 module_name(ioc3_submodules[id]->owner),
 775                                                 pci_name(pdev));
 776                         idd->active[id] = 0;
 777                 }
 778
 779         /* Clear and disable all IRQs */
 780         write_ireg(idd, ~0, IOC3_W_IEC);
 781         writel(~0, &idd->vma->sio_ir);
 782
 783         /* Release resources */
 784         free_irq(idd->irq_io, (void *)idd);
 785         if(idd->dual_irq)
 786                 free_irq(idd->irq_eth, (void *)idd);
 787         iounmap(idd->vma);
 788         release_mem_region(idd->pma, IOC3_PCI_SIZE);
 789
 790         /* Disable IOC3 and relinquish */
 791         pci_disable_device(pdev);
 792
 793         /* Remove and free driver data */
 794         down_write(&ioc3_devices_rwsem);
 795         list_del(&idd->list);
 796         up_write(&ioc3_devices_rwsem);
 797         kfree(idd);
 798 }
 799
 800 static struct pci_device_id ioc3_id_table[] = {
 801         {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
 802         {0}
 803 };
 804
 805 static struct pci_driver ioc3_driver = {
 806         .name = "IOC3",
 807         .id_table = ioc3_id_table,
 808         .probe = ioc3_probe,
 809         .remove = ioc3_remove,
 810 };
 811
 812 MODULE_DEVICE_TABLE(pci, ioc3_id_table);
 813
 814 /*********************
 815  * Module management *
 816  *********************/
 817
 818 /* Module load */
 819 static int __init ioc3_init(void)
 820 {
 821         if (ia64_platform_is("sn2"))
 822                 return pci_register_driver(&ioc3_driver);
 823         return -ENODEV;
 824 }
 825
 826 /* Module unload */
 827 static void __exit ioc3_exit(void)
 828 {
 829         pci_unregister_driver(&ioc3_driver);
 830 }
 831
 832 module_init(ioc3_init);
 833 module_exit(ioc3_exit);
 834
 835 MODULE_AUTHOR("Stanislaw Skowronek <[email protected]>");
 836 MODULE_DESCRIPTION("PCI driver for SGI IOC3");
 837 MODULE_LICENSE("GPL");
 838
 839 EXPORT_SYMBOL_GPL(ioc3_register_submodule);
 840 EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
 841 EXPORT_SYMBOL_GPL(ioc3_ack);
 842 EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
 843 EXPORT_SYMBOL_GPL(ioc3_disable);
 844 EXPORT_SYMBOL_GPL(ioc3_enable);