drivers/pcmcia/i82092.c

   1 /*
   2  * Driver for Intel I82092AA PCI-PCMCIA bridge.
   3  *
   4  * (C) 2001 Red Hat, Inc.
   5  *
   6  * Author: Arjan Van De Ven <arjanv@redhat.com>
   7  * Loosly based on i82365.c from the pcmcia-cs package
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/pci.h>
  13 #include <linux/init.h>
  14 #include <linux/workqueue.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/device.h>
  17
  18 #include <pcmcia/ss.h>
  19
  20 #include <asm/io.h>
  21
  22 #include "i82092aa.h"
  23 #include "i82365.h"
  24
  25 MODULE_LICENSE("GPL");
  26
  27 /* PCI core routines */
  28 static const struct pci_device_id i82092aa_pci_ids[] = {
  29         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
  30         { }
  31 };
  32 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
  33
  34 static struct pci_driver i82092aa_pci_driver = {
  35         .name           = "i82092aa",
  36         .id_table       = i82092aa_pci_ids,
  37         .probe          = i82092aa_pci_probe,
  38         .remove         = i82092aa_pci_remove,
  39 };
  40
  41
  42 /* the pccard structure and its functions */
  43 static struct pccard_operations i82092aa_operations = {
  44         .init                   = i82092aa_init,
  45         .get_status             = i82092aa_get_status,
  46         .set_socket             = i82092aa_set_socket,
  47         .set_io_map             = i82092aa_set_io_map,
  48         .set_mem_map            = i82092aa_set_mem_map,
  49 };
  50
  51 /* The card can do up to 4 sockets, allocate a structure for each of them */
  52
  53 struct socket_info {
  54         int     number;
  55         int     card_state;     /*  0 = no socket,
  56                                     1 = empty socket,
  57                                     2 = card but not initialized,
  58                                     3 = operational card */
  59         unsigned int io_base;   /* base io address of the socket */
  60
  61         struct pcmcia_socket socket;
  62         struct pci_dev *dev;    /* The PCI device for the socket */
  63 };
  64
  65 #define MAX_SOCKETS 4
  66 static struct socket_info sockets[MAX_SOCKETS];
  67 static int socket_count;  /* shortcut */
  68
  69
  70 static int i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
  71 {
  72         unsigned char configbyte;
  73         int i, ret;
  74
  75         enter("i82092aa_pci_probe");
  76
  77         if ((ret = pci_enable_device(dev)))
  78                 return ret;
  79
  80         pci_read_config_byte(dev, 0x40, &configbyte);  /* PCI Configuration Control */
  81         switch(configbyte&6) {
  82                 case 0:
  83                         socket_count = 2;
  84                         break;
  85                 case 2:
  86                         socket_count = 1;
  87                         break;
  88                 case 4:
  89                 case 6:
  90                         socket_count = 4;
  91                         break;
  92
  93                 default:
  94                         printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
  95                         ret = -EIO;
  96                         goto err_out_disable;
  97         }
  98         printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
  99
 100         if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
 101                 ret = -EBUSY;
 102                 goto err_out_disable;
 103         }
 104
 105         for (i = 0;i<socket_count;i++) {
 106                 sockets[i].card_state = 1; /* 1 = present but empty */
 107                 sockets[i].io_base = pci_resource_start(dev, 0);
 108                 sockets[i].dev = dev;
 109                 sockets[i].socket.features |= SS_CAP_PCCARD;
 110                 sockets[i].socket.map_size = 0x1000;
 111                 sockets[i].socket.irq_mask = 0;
 112                 sockets[i].socket.pci_irq  = dev->irq;
 113                 sockets[i].socket.cb_dev  = dev;
 114                 sockets[i].socket.owner = THIS_MODULE;
 115
 116                 sockets[i].number = i;
 117
 118                 if (card_present(i)) {
 119                         sockets[i].card_state = 3;
 120                         dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
 121                 } else {
 122                         dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
 123                 }
 124         }
 125
 126         /* Now, specifiy that all interrupts are to be done as PCI interrupts */
 127         configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
 128         pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
 129
 130         /* Register the interrupt handler */
 131         dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
 132         if ((ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED, "i82092aa", i82092aa_interrupt))) {
 133                 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
 134                 goto err_out_free_res;
 135         }
 136
 137         for (i = 0; i<socket_count; i++) {
 138                 sockets[i].socket.dev.parent = &dev->dev;
 139                 sockets[i].socket.ops = &i82092aa_operations;
 140                 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
 141                 ret = pcmcia_register_socket(&sockets[i].socket);
 142                 if (ret) {
 143                         goto err_out_free_sockets;
 144                 }
 145         }
 146
 147         leave("i82092aa_pci_probe");
 148         return 0;
 149
 150 err_out_free_sockets:
 151         if (i) {
 152                 for (i--;i>=0;i--) {
 153                         pcmcia_unregister_socket(&sockets[i].socket);
 154                 }
 155         }
 156         free_irq(dev->irq, i82092aa_interrupt);
 157 err_out_free_res:
 158         release_region(pci_resource_start(dev, 0), 2);
 159 err_out_disable:
 160         pci_disable_device(dev);
 161         return ret;
 162 }
 163
 164 static void i82092aa_pci_remove(struct pci_dev *dev)
 165 {
 166         int i;
 167
 168         enter("i82092aa_pci_remove");
 169
 170         free_irq(dev->irq, i82092aa_interrupt);
 171
 172         for (i = 0; i < socket_count; i++)
 173                 pcmcia_unregister_socket(&sockets[i].socket);
 174
 175         leave("i82092aa_pci_remove");
 176 }
 177
 178 static DEFINE_SPINLOCK(port_lock);
 179
 180 /* basic value read/write functions */
 181
 182 static unsigned char indirect_read(int socket, unsigned short reg)
 183 {
 184         unsigned short int port;
 185         unsigned char val;
 186         unsigned long flags;
 187         spin_lock_irqsave(&port_lock,flags);
 188         reg += socket * 0x40;
 189         port = sockets[socket].io_base;
 190         outb(reg,port);
 191         val = inb(port+1);
 192         spin_unlock_irqrestore(&port_lock,flags);
 193         return val;
 194 }
 195
 196 #if 0
 197 static unsigned short indirect_read16(int socket, unsigned short reg)
 198 {
 199         unsigned short int port;
 200         unsigned short tmp;
 201         unsigned long flags;
 202         spin_lock_irqsave(&port_lock,flags);
 203         reg  = reg + socket * 0x40;
 204         port = sockets[socket].io_base;
 205         outb(reg,port);
 206         tmp = inb(port+1);
 207         reg++;
 208         outb(reg,port);
 209         tmp = tmp | (inb(port+1)<<8);
 210         spin_unlock_irqrestore(&port_lock,flags);
 211         return tmp;
 212 }
 213 #endif
 214
 215 static void indirect_write(int socket, unsigned short reg, unsigned char value)
 216 {
 217         unsigned short int port;
 218         unsigned long flags;
 219         spin_lock_irqsave(&port_lock,flags);
 220         reg = reg + socket * 0x40;
 221         port = sockets[socket].io_base;
 222         outb(reg,port);
 223         outb(value,port+1);
 224         spin_unlock_irqrestore(&port_lock,flags);
 225 }
 226
 227 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
 228 {
 229         unsigned short int port;
 230         unsigned char val;
 231         unsigned long flags;
 232         spin_lock_irqsave(&port_lock,flags);
 233         reg = reg + socket * 0x40;
 234         port = sockets[socket].io_base;
 235         outb(reg,port);
 236         val = inb(port+1);
 237         val |= mask;
 238         outb(reg,port);
 239         outb(val,port+1);
 240         spin_unlock_irqrestore(&port_lock,flags);
 241 }
 242
 243
 244 static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
 245 {
 246         unsigned short int port;
 247         unsigned char val;
 248         unsigned long flags;
 249         spin_lock_irqsave(&port_lock,flags);
 250         reg = reg + socket * 0x40;
 251         port = sockets[socket].io_base;
 252         outb(reg,port);
 253         val = inb(port+1);
 254         val &= ~mask;
 255         outb(reg,port);
 256         outb(val,port+1);
 257         spin_unlock_irqrestore(&port_lock,flags);
 258 }
 259
 260 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
 261 {
 262         unsigned short int port;
 263         unsigned char val;
 264         unsigned long flags;
 265         spin_lock_irqsave(&port_lock,flags);
 266         reg = reg + socket * 0x40;
 267         port = sockets[socket].io_base;
 268
 269         outb(reg,port);
 270         val = value & 255;
 271         outb(val,port+1);
 272
 273         reg++;
 274
 275         outb(reg,port);
 276         val = value>>8;
 277         outb(val,port+1);
 278         spin_unlock_irqrestore(&port_lock,flags);
 279 }
 280
 281 /* simple helper functions */
 282 /* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
 283 static int cycle_time = 120;
 284
 285 static int to_cycles(int ns)
 286 {
 287         if (cycle_time!=0)
 288                 return ns/cycle_time;
 289         else
 290                 return 0;
 291 }
 292
 293
 294 /* Interrupt handler functionality */
 295
 296 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
 297 {
 298         int i;
 299         int loopcount = 0;
 300         int handled = 0;
 301
 302         unsigned int events, active=0;
 303
 304 /*      enter("i82092aa_interrupt");*/
 305
 306         while (1) {
 307                 loopcount++;
 308                 if (loopcount>20) {
 309                         printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
 310                         break;
 311                 }
 312
 313                 active = 0;
 314
 315                 for (i=0;i<socket_count;i++) {
 316                         int csc;
 317                         if (sockets[i].card_state==0) /* Inactive socket, should not happen */
 318                                 continue;
 319
 320                         csc = indirect_read(i,I365_CSC); /* card status change register */
 321
 322                         if (csc==0)  /* no events on this socket */
 323                                 continue;
 324                         handled = 1;
 325                         events = 0;
 326
 327                         if (csc & I365_CSC_DETECT) {
 328                                 events |= SS_DETECT;
 329                                 printk("Card detected in socket %i!\n",i);
 330                          }
 331
 332                         if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) {
 333                                 /* For IO/CARDS, bit 0 means "read the card" */
 334                                 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0;
 335                         } else {
 336                                 /* Check for battery/ready events */
 337                                 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
 338                                 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
 339                                 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
 340                         }
 341
 342                         if (events) {
 343                                 pcmcia_parse_events(&sockets[i].socket, events);
 344                         }
 345                         active |= events;
 346                 }
 347
 348                 if (active==0) /* no more events to handle */
 349                         break;
 350
 351         }
 352         return IRQ_RETVAL(handled);
 353 /*      leave("i82092aa_interrupt");*/
 354 }
 355
 356
 357
 358 /* socket functions */
 359
 360 static int card_present(int socketno)
 361 {
 362         unsigned int val;
 363         enter("card_present");
 364
 365         if ((socketno<0) || (socketno >= MAX_SOCKETS))
 366                 return 0;
 367         if (sockets[socketno].io_base == 0)
 368                 return 0;
 369
 370
 371         val = indirect_read(socketno, 1); /* Interface status register */
 372         if ((val&12)==12) {
 373                 leave("card_present 1");
 374                 return 1;
 375         }
 376
 377         leave("card_present 0");
 378         return 0;
 379 }
 380
 381 static void set_bridge_state(int sock)
 382 {
 383         enter("set_bridge_state");
 384         indirect_write(sock, I365_GBLCTL,0x00);
 385         indirect_write(sock, I365_GENCTL,0x00);
 386
 387         indirect_setbit(sock, I365_INTCTL,0x08);
 388         leave("set_bridge_state");
 389 }
 390
 391
 392
 393
 394
 395
 396 static int i82092aa_init(struct pcmcia_socket *sock)
 397 {
 398         int i;
 399         struct resource res = { .start = 0, .end = 0x0fff };
 400         pccard_io_map io = { 0, 0, 0, 0, 1 };
 401         pccard_mem_map mem = { .res = &res, };
 402
 403         enter("i82092aa_init");
 404
 405         for (i = 0; i < 2; i++) {
 406                 io.map = i;
 407                 i82092aa_set_io_map(sock, &io);
 408         }
 409         for (i = 0; i < 5; i++) {
 410                 mem.map = i;
 411                 i82092aa_set_mem_map(sock, &mem);
 412         }
 413
 414         leave("i82092aa_init");
 415         return 0;
 416 }
 417
 418 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
 419 {
 420         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 421         unsigned int status;
 422
 423         enter("i82092aa_get_status");
 424
 425         status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
 426         *value = 0;
 427
 428         if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
 429                 *value |= SS_DETECT;
 430         }
 431
 432         /* IO cards have a different meaning of bits 0,1 */
 433         /* Also notice the inverse-logic on the bits */
 434          if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
 435                 /* IO card */
 436                 if (!(status & I365_CS_STSCHG))
 437                         *value |= SS_STSCHG;
 438          } else { /* non I/O card */
 439                 if (!(status & I365_CS_BVD1))
 440                         *value |= SS_BATDEAD;
 441                 if (!(status & I365_CS_BVD2))
 442                         *value |= SS_BATWARN;
 443
 444          }
 445
 446          if (status & I365_CS_WRPROT)
 447                 (*value) |= SS_WRPROT;  /* card is write protected */
 448
 449          if (status & I365_CS_READY)
 450                 (*value) |= SS_READY;    /* card is not busy */
 451
 452          if (status & I365_CS_POWERON)
 453                 (*value) |= SS_POWERON;  /* power is applied to the card */
 454
 455
 456         leave("i82092aa_get_status");
 457         return 0;
 458 }
 459
 460
 461 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state)
 462 {
 463         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 464         unsigned char reg;
 465
 466         enter("i82092aa_set_socket");
 467
 468         /* First, set the global controller options */
 469
 470         set_bridge_state(sock);
 471
 472         /* Values for the IGENC register */
 473
 474         reg = 0;
 475         if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
 476                 reg = reg | I365_PC_RESET;
 477         if (state->flags & SS_IOCARD)
 478                 reg = reg | I365_PC_IOCARD;
 479
 480         indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
 481
 482         /* Power registers */
 483
 484         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
 485
 486         if (state->flags & SS_PWR_AUTO) {
 487                 printk("Auto power\n");
 488                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
 489         }
 490         if (state->flags & SS_OUTPUT_ENA) {
 491                 printk("Power Enabled \n");
 492                 reg |= I365_PWR_OUT;    /* enable power */
 493         }
 494
 495         switch (state->Vcc) {
 496                 case 0:
 497                         break;
 498                 case 50:
 499                         printk("setting voltage to Vcc to 5V on socket %i\n",sock);
 500                         reg |= I365_VCC_5V;
 501                         break;
 502                 default:
 503                         printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
 504                         leave("i82092aa_set_socket");
 505                         return -EINVAL;
 506         }
 507
 508
 509         switch (state->Vpp) {
 510                 case 0:
 511                         printk("not setting Vpp on socket %i\n",sock);
 512                         break;
 513                 case 50:
 514                         printk("setting Vpp to 5.0 for socket %i\n",sock);
 515                         reg |= I365_VPP1_5V | I365_VPP2_5V;
 516                         break;
 517                 case 120:
 518                         printk("setting Vpp to 12.0\n");
 519                         reg |= I365_VPP1_12V | I365_VPP2_12V;
 520                         break;
 521                 default:
 522                         printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
 523                         leave("i82092aa_set_socket");
 524                         return -EINVAL;
 525         }
 526
 527         if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
 528                 indirect_write(sock,I365_POWER,reg);
 529
 530         /* Enable specific interrupt events */
 531
 532         reg = 0x00;
 533         if (state->csc_mask & SS_DETECT) {
 534                 reg |= I365_CSC_DETECT;
 535         }
 536         if (state->flags & SS_IOCARD) {
 537                 if (state->csc_mask & SS_STSCHG)
 538                         reg |= I365_CSC_STSCHG;
 539         } else {
 540                 if (state->csc_mask & SS_BATDEAD)
 541                         reg |= I365_CSC_BVD1;
 542                 if (state->csc_mask & SS_BATWARN)
 543                         reg |= I365_CSC_BVD2;
 544                 if (state->csc_mask & SS_READY)
 545                         reg |= I365_CSC_READY;
 546
 547         }
 548
 549         /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
 550
 551         indirect_write(sock,I365_CSCINT,reg);
 552         (void)indirect_read(sock,I365_CSC);
 553
 554         leave("i82092aa_set_socket");
 555         return 0;
 556 }
 557
 558 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
 559 {
 560         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 561         unsigned char map, ioctl;
 562
 563         enter("i82092aa_set_io_map");
 564
 565         map = io->map;
 566
 567         /* Check error conditions */
 568         if (map > 1) {
 569                 leave("i82092aa_set_io_map with invalid map");
 570                 return -EINVAL;
 571         }
 572         if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
 573                 leave("i82092aa_set_io_map with invalid io");
 574                 return -EINVAL;
 575         }
 576
 577         /* Turn off the window before changing anything */
 578         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
 579                 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
 580
 581 /*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
 582
 583         /* write the new values */
 584         indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);
 585         indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);
 586
 587         ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
 588
 589         if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
 590                 ioctl |= I365_IOCTL_16BIT(map);
 591
 592         indirect_write(sock,I365_IOCTL,ioctl);
 593
 594         /* Turn the window back on if needed */
 595         if (io->flags & MAP_ACTIVE)
 596                 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
 597
 598         leave("i82092aa_set_io_map");
 599         return 0;
 600 }
 601
 602 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
 603 {
 604         struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
 605         unsigned int sock = sock_info->number;
 606         struct pci_bus_region region;
 607         unsigned short base, i;
 608         unsigned char map;
 609
 610         enter("i82092aa_set_mem_map");
 611
 612         pcibios_resource_to_bus(sock_info->dev->bus, &region, mem->res);
 613
 614         map = mem->map;
 615         if (map > 4) {
 616                 leave("i82092aa_set_mem_map: invalid map");
 617                 return -EINVAL;
 618         }
 619
 620
 621         if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
 622              (mem->speed > 1000) ) {
 623                 leave("i82092aa_set_mem_map: invalid address / speed");
 624                 printk("invalid mem map for socket %i: %llx to %llx with a "
 625                         "start of %x\n",
 626                         sock,
 627                         (unsigned long long)region.start,
 628                         (unsigned long long)region.end,
 629                         mem->card_start);
 630                 return -EINVAL;
 631         }
 632
 633         /* Turn off the window before changing anything */
 634         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
 635                       indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
 636
 637
 638 /*      printk("set_mem_map: Setting map %i range to %x - %x on socket %i, speed is %i, active = %i \n",map, region.start,region.end,sock,mem->speed,mem->flags & MAP_ACTIVE);  */
 639
 640         /* write the start address */
 641         base = I365_MEM(map);
 642         i = (region.start >> 12) & 0x0fff;
 643         if (mem->flags & MAP_16BIT)
 644                 i |= I365_MEM_16BIT;
 645         if (mem->flags & MAP_0WS)
 646                 i |= I365_MEM_0WS;
 647         indirect_write16(sock,base+I365_W_START,i);
 648
 649         /* write the stop address */
 650
 651         i= (region.end >> 12) & 0x0fff;
 652         switch (to_cycles(mem->speed)) {
 653                 case 0:
 654                         break;
 655                 case 1:
 656                         i |= I365_MEM_WS0;
 657                         break;
 658                 case 2:
 659                         i |= I365_MEM_WS1;
 660                         break;
 661                 default:
 662                         i |= I365_MEM_WS1 | I365_MEM_WS0;
 663                         break;
 664         }
 665
 666         indirect_write16(sock,base+I365_W_STOP,i);
 667
 668         /* card start */
 669
 670         i = ((mem->card_start - region.start) >> 12) & 0x3fff;
 671         if (mem->flags & MAP_WRPROT)
 672                 i |= I365_MEM_WRPROT;
 673         if (mem->flags & MAP_ATTRIB) {
 674 /*              printk("requesting attribute memory for socket %i\n",sock);*/
 675                 i |= I365_MEM_REG;
 676         } else {
 677 /*              printk("requesting normal memory for socket %i\n",sock);*/
 678         }
 679         indirect_write16(sock,base+I365_W_OFF,i);
 680
 681         /* Enable the window if necessary */
 682         if (mem->flags & MAP_ACTIVE)
 683                 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
 684
 685         leave("i82092aa_set_mem_map");
 686         return 0;
 687 }
 688
 689 static int i82092aa_module_init(void)
 690 {
 691         return pci_register_driver(&i82092aa_pci_driver);
 692 }
 693
 694 static void i82092aa_module_exit(void)
 695 {
 696         enter("i82092aa_module_exit");
 697         pci_unregister_driver(&i82092aa_pci_driver);
 698         if (sockets[0].io_base>0)
 699                          release_region(sockets[0].io_base, 2);
 700         leave("i82092aa_module_exit");
 701 }
 702
 703 module_init(i82092aa_module_init);
 704 module_exit(i82092aa_module_exit);
 705