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