LXR linux/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
  25MODULE_LICENSE("GPL");
  26
  27/* PCI core routines */
  28static DEFINE_PCI_DEVICE_TABLE(i82092aa_pci_ids) = {
  29        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
  30        { }
  31};
  32MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
  33
  34static 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 */
  43static 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
  53struct 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
  66static struct socket_info sockets[MAX_SOCKETS];
  67static int socket_count;  /* shortcut */                                                                                
  68
  69
  70static 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        pci_set_drvdata(dev, &sockets[i].socket);
 137
 138        for (i = 0; i<socket_count; i++) {
 139                sockets[i].socket.dev.parent = &dev->dev;
 140                sockets[i].socket.ops = &i82092aa_operations;
 141                sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
 142                ret = pcmcia_register_socket(&sockets[i].socket);
 143                if (ret) {
 144                        goto err_out_free_sockets;
 145                }
 146        }
 147
 148        leave("i82092aa_pci_probe");
 149        return 0;
 150
 151err_out_free_sockets:
 152        if (i) {
 153                for (i--;i>=0;i--) {
 154                        pcmcia_unregister_socket(&sockets[i].socket);
 155                }
 156        }
 157        free_irq(dev->irq, i82092aa_interrupt);
 158err_out_free_res:
 159        release_region(pci_resource_start(dev, 0), 2);
 160err_out_disable:
 161        pci_disable_device(dev);
 162        return ret;                     
 163}
 164
 165static void i82092aa_pci_remove(struct pci_dev *dev)
 166{
 167        struct pcmcia_socket *socket = pci_get_drvdata(dev);
 168
 169        enter("i82092aa_pci_remove");
 170        
 171        free_irq(dev->irq, i82092aa_interrupt);
 172
 173        if (socket)
 174                pcmcia_unregister_socket(socket);
 175
 176        leave("i82092aa_pci_remove");
 177}
 178
 179static DEFINE_SPINLOCK(port_lock);
 180
 181/* basic value read/write functions */
 182
 183static unsigned char indirect_read(int socket, unsigned short reg)
 184{
 185        unsigned short int port;
 186        unsigned char val;
 187        unsigned long flags;
 188        spin_lock_irqsave(&port_lock,flags);
 189        reg += socket * 0x40;
 190        port = sockets[socket].io_base;
 191        outb(reg,port);
 192        val = inb(port+1);
 193        spin_unlock_irqrestore(&port_lock,flags);
 194        return val;
 195}
 196
 197#if 0
 198static unsigned short indirect_read16(int socket, unsigned short reg)
 199{
 200        unsigned short int port;
 201        unsigned short tmp;
 202        unsigned long flags;
 203        spin_lock_irqsave(&port_lock,flags);
 204        reg  = reg + socket * 0x40;
 205        port = sockets[socket].io_base;
 206        outb(reg,port);
 207        tmp = inb(port+1);
 208        reg++;
 209        outb(reg,port);
 210        tmp = tmp | (inb(port+1)<<8);
 211        spin_unlock_irqrestore(&port_lock,flags);
 212        return tmp;
 213}
 214#endif
 215
 216static void indirect_write(int socket, unsigned short reg, unsigned char value)
 217{
 218        unsigned short int port;
 219        unsigned long flags;
 220        spin_lock_irqsave(&port_lock,flags);
 221        reg = reg + socket * 0x40;
 222        port = sockets[socket].io_base; 
 223        outb(reg,port);
 224        outb(value,port+1);
 225        spin_unlock_irqrestore(&port_lock,flags);
 226}
 227
 228static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
 229{
 230        unsigned short int port;
 231        unsigned char val;
 232        unsigned long flags;
 233        spin_lock_irqsave(&port_lock,flags);
 234        reg = reg + socket * 0x40;
 235        port = sockets[socket].io_base; 
 236        outb(reg,port);
 237        val = inb(port+1);
 238        val |= mask;
 239        outb(reg,port);
 240        outb(val,port+1);
 241        spin_unlock_irqrestore(&port_lock,flags);
 242}
 243
 244
 245static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
 246{
 247        unsigned short int port;
 248        unsigned char val;
 249        unsigned long flags;
 250        spin_lock_irqsave(&port_lock,flags);
 251        reg = reg + socket * 0x40;
 252        port = sockets[socket].io_base; 
 253        outb(reg,port);
 254        val = inb(port+1);
 255        val &= ~mask;
 256        outb(reg,port);
 257        outb(val,port+1);
 258        spin_unlock_irqrestore(&port_lock,flags);
 259}
 260
 261static void indirect_write16(int socket, unsigned short reg, unsigned short value)
 262{
 263        unsigned short int port;
 264        unsigned char val;
 265        unsigned long flags;
 266        spin_lock_irqsave(&port_lock,flags);
 267        reg = reg + socket * 0x40;
 268        port = sockets[socket].io_base; 
 269        
 270        outb(reg,port);
 271        val = value & 255;
 272        outb(val,port+1);
 273        
 274        reg++;
 275        
 276        outb(reg,port);
 277        val = value>>8;
 278        outb(val,port+1);
 279        spin_unlock_irqrestore(&port_lock,flags);
 280}
 281
 282/* simple helper functions */
 283/* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
 284static int cycle_time = 120;
 285
 286static int to_cycles(int ns)
 287{
 288        if (cycle_time!=0)
 289                return ns/cycle_time;
 290        else
 291                return 0;
 292}
 293    
 294
 295/* Interrupt handler functionality */
 296
 297static irqreturn_t i82092aa_interrupt(int irq, void *dev)
 298{
 299        int i;
 300        int loopcount = 0;
 301        int handled = 0;
 302
 303        unsigned int events, active=0;
 304        
 305/*      enter("i82092aa_interrupt");*/
 306        
 307        while (1) {
 308                loopcount++;
 309                if (loopcount>20) {
 310                        printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
 311                        break;
 312                }
 313                
 314                active = 0;
 315                
 316                for (i=0;i<socket_count;i++) {
 317                        int csc;
 318                        if (sockets[i].card_state==0) /* Inactive socket, should not happen */
 319                                continue;
 320                        
 321                        csc = indirect_read(i,I365_CSC); /* card status change register */
 322                        
 323                        if (csc==0)  /* no events on this socket */
 324                                continue;
 325                        handled = 1;
 326                        events = 0;
 327                         
 328                        if (csc & I365_CSC_DETECT) {
 329                                events |= SS_DETECT;
 330                                printk("Card detected in socket %i!\n",i);
 331                         }
 332                        
 333                        if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) { 
 334                                /* For IO/CARDS, bit 0 means "read the card" */
 335                                events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; 
 336                        } else {
 337                                /* Check for battery/ready events */
 338                                events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
 339                                events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
 340                                events |= (csc & I365_CSC_READY) ? SS_READY : 0;
 341                        }
 342                        
 343                        if (events) {
 344                                pcmcia_parse_events(&sockets[i].socket, events);
 345                        }
 346                        active |= events;
 347                }
 348                                
 349                if (active==0) /* no more events to handle */
 350                        break;                          
 351                
 352        }
 353        return IRQ_RETVAL(handled);
 354/*      leave("i82092aa_interrupt");*/
 355}
 356
 357
 358
 359/* socket functions */
 360
 361static int card_present(int socketno)
 362{       
 363        unsigned int val;
 364        enter("card_present");
 365        
 366        if ((socketno<0) || (socketno >= MAX_SOCKETS))
 367                return 0;
 368        if (sockets[socketno].io_base == 0)
 369                return 0;
 370
 371                
 372        val = indirect_read(socketno, 1); /* Interface status register */
 373        if ((val&12)==12) {
 374                leave("card_present 1");
 375                return 1;
 376        }
 377                
 378        leave("card_present 0");
 379        return 0;
 380}
 381
 382static void set_bridge_state(int sock)
 383{
 384        enter("set_bridge_state");
 385        indirect_write(sock, I365_GBLCTL,0x00);
 386        indirect_write(sock, I365_GENCTL,0x00);
 387        
 388        indirect_setbit(sock, I365_INTCTL,0x08);
 389        leave("set_bridge_state");
 390}
 391
 392
 393
 394
 395
 396      
 397static int i82092aa_init(struct pcmcia_socket *sock)
 398{
 399        int i;
 400        struct resource res = { .start = 0, .end = 0x0fff };
 401        pccard_io_map io = { 0, 0, 0, 0, 1 };
 402        pccard_mem_map mem = { .res = &res, };
 403        
 404        enter("i82092aa_init");
 405                        
 406        for (i = 0; i < 2; i++) {
 407                io.map = i;
 408                i82092aa_set_io_map(sock, &io);
 409        }
 410        for (i = 0; i < 5; i++) {
 411                mem.map = i;
 412                i82092aa_set_mem_map(sock, &mem);
 413        }
 414        
 415        leave("i82092aa_init");
 416        return 0;
 417}
 418                                                                                                                                                                                                                                              
 419static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
 420{
 421        unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 422        unsigned int status;
 423        
 424        enter("i82092aa_get_status");
 425        
 426        status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
 427        *value = 0;
 428        
 429        if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
 430                *value |= SS_DETECT;
 431        }
 432                
 433        /* IO cards have a different meaning of bits 0,1 */
 434        /* Also notice the inverse-logic on the bits */
 435         if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
 436                /* IO card */
 437                if (!(status & I365_CS_STSCHG))
 438                        *value |= SS_STSCHG;
 439         } else { /* non I/O card */
 440                if (!(status & I365_CS_BVD1))
 441                        *value |= SS_BATDEAD;
 442                if (!(status & I365_CS_BVD2))
 443                        *value |= SS_BATWARN;
 444                        
 445         }
 446         
 447         if (status & I365_CS_WRPROT)
 448                (*value) |= SS_WRPROT;  /* card is write protected */
 449         
 450         if (status & I365_CS_READY)
 451                (*value) |= SS_READY;    /* card is not busy */
 452                
 453         if (status & I365_CS_POWERON)
 454                (*value) |= SS_POWERON;  /* power is applied to the card */
 455
 456
 457        leave("i82092aa_get_status");
 458        return 0;
 459}
 460
 461
 462static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state) 
 463{
 464        unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 465        unsigned char reg;
 466        
 467        enter("i82092aa_set_socket");
 468        
 469        /* First, set the global controller options */
 470        
 471        set_bridge_state(sock);
 472        
 473        /* Values for the IGENC register */
 474        
 475        reg = 0;
 476        if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
 477                reg = reg | I365_PC_RESET;  
 478        if (state->flags & SS_IOCARD) 
 479                reg = reg | I365_PC_IOCARD;
 480                
 481        indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
 482        
 483        /* Power registers */
 484        
 485        reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
 486        
 487        if (state->flags & SS_PWR_AUTO) {
 488                printk("Auto power\n");
 489                reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
 490        }
 491        if (state->flags & SS_OUTPUT_ENA) {
 492                printk("Power Enabled \n");
 493                reg |= I365_PWR_OUT;    /* enable power */
 494        }
 495        
 496        switch (state->Vcc) {
 497                case 0: 
 498                        break;
 499                case 50: 
 500                        printk("setting voltage to Vcc to 5V on socket %i\n",sock);
 501                        reg |= I365_VCC_5V;
 502                        break;
 503                default:
 504                        printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
 505                        leave("i82092aa_set_socket");
 506                        return -EINVAL;
 507        }
 508        
 509        
 510        switch (state->Vpp) {
 511                case 0: 
 512                        printk("not setting Vpp on socket %i\n",sock);
 513                        break;
 514                case 50: 
 515                        printk("setting Vpp to 5.0 for socket %i\n",sock);
 516                        reg |= I365_VPP1_5V | I365_VPP2_5V;
 517                        break;
 518                case 120: 
 519                        printk("setting Vpp to 12.0\n");
 520                        reg |= I365_VPP1_12V | I365_VPP2_12V;
 521                        break;
 522                default:
 523                        printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
 524                        leave("i82092aa_set_socket");
 525                        return -EINVAL;
 526        }
 527        
 528        if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
 529                indirect_write(sock,I365_POWER,reg);
 530                
 531        /* Enable specific interrupt events */
 532        
 533        reg = 0x00;
 534        if (state->csc_mask & SS_DETECT) {
 535                reg |= I365_CSC_DETECT;
 536        }
 537        if (state->flags & SS_IOCARD) {
 538                if (state->csc_mask & SS_STSCHG)
 539                        reg |= I365_CSC_STSCHG;
 540        } else {
 541                if (state->csc_mask & SS_BATDEAD) 
 542                        reg |= I365_CSC_BVD1;
 543                if (state->csc_mask & SS_BATWARN) 
 544                        reg |= I365_CSC_BVD2;
 545                if (state->csc_mask & SS_READY) 
 546                        reg |= I365_CSC_READY; 
 547                                        
 548        }
 549        
 550        /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
 551        
 552        indirect_write(sock,I365_CSCINT,reg);
 553        (void)indirect_read(sock,I365_CSC);
 554
 555        leave("i82092aa_set_socket");
 556        return 0;
 557}
 558
 559static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
 560{
 561        unsigned int sock = container_of(socket, struct socket_info, socket)->number;
 562        unsigned char map, ioctl;
 563        
 564        enter("i82092aa_set_io_map");
 565        
 566        map = io->map;
 567        
 568        /* Check error conditions */    
 569        if (map > 1) {
 570                leave("i82092aa_set_io_map with invalid map");
 571                return -EINVAL;
 572        }
 573        if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
 574                leave("i82092aa_set_io_map with invalid io");
 575                return -EINVAL;
 576        }
 577
 578        /* Turn off the window before changing anything */ 
 579        if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
 580                indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
 581
 582/*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
 583        
 584        /* write the new values */
 585        indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);             
 586        indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);               
 587                        
 588        ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
 589        
 590        if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
 591                ioctl |= I365_IOCTL_16BIT(map);
 592                
 593        indirect_write(sock,I365_IOCTL,ioctl);
 594        
 595        /* Turn the window back on if needed */
 596        if (io->flags & MAP_ACTIVE)
 597                indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
 598                        
 599        leave("i82092aa_set_io_map");   
 600        return 0;
 601}
 602
 603static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
 604{
 605        struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
 606        unsigned int sock = sock_info->number;
 607        struct pci_bus_region region;
 608        unsigned short base, i;
 609        unsigned char map;
 610        
 611        enter("i82092aa_set_mem_map");
 612
 613        pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
 614        
 615        map = mem->map;
 616        if (map > 4) {
 617                leave("i82092aa_set_mem_map: invalid map");
 618                return -EINVAL;
 619        }
 620        
 621        
 622        if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
 623             (mem->speed > 1000) ) {
 624                leave("i82092aa_set_mem_map: invalid address / speed");
 625                printk("invalid mem map for socket %i: %llx to %llx with a "
 626                        "start of %x\n",
 627                        sock,
 628                        (unsigned long long)region.start,
 629                        (unsigned long long)region.end,
 630                        mem->card_start);
 631                return -EINVAL;
 632        }
 633        
 634        /* Turn off the window before changing anything */
 635        if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
 636                      indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
 637                         
 638                         
 639/*      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);  */
 640
 641        /* write the start address */
 642        base = I365_MEM(map);
 643        i = (region.start >> 12) & 0x0fff;
 644        if (mem->flags & MAP_16BIT) 
 645                i |= I365_MEM_16BIT;
 646        if (mem->flags & MAP_0WS)
 647                i |= I365_MEM_0WS;      
 648        indirect_write16(sock,base+I365_W_START,i);
 649                               
 650        /* write the stop address */
 651        
 652        i= (region.end >> 12) & 0x0fff;
 653        switch (to_cycles(mem->speed)) {
 654                case 0:
 655                        break;
 656                case 1:
 657                        i |= I365_MEM_WS0;
 658                        break;
 659                case 2:
 660                        i |= I365_MEM_WS1;
 661                        break;
 662                default:
 663                        i |= I365_MEM_WS1 | I365_MEM_WS0;
 664                        break;
 665        }
 666        
 667        indirect_write16(sock,base+I365_W_STOP,i);
 668        
 669        /* card start */
 670        
 671        i = ((mem->card_start - region.start) >> 12) & 0x3fff;
 672        if (mem->flags & MAP_WRPROT)
 673                i |= I365_MEM_WRPROT;
 674        if (mem->flags & MAP_ATTRIB) {
 675/*              printk("requesting attribute memory for socket %i\n",sock);*/
 676                i |= I365_MEM_REG;
 677        } else {
 678/*              printk("requesting normal memory for socket %i\n",sock);*/
 679        }
 680        indirect_write16(sock,base+I365_W_OFF,i);
 681        
 682        /* Enable the window if necessary */
 683        if (mem->flags & MAP_ACTIVE)
 684                indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
 685                    
 686        leave("i82092aa_set_mem_map");
 687        return 0;
 688}
 689
 690static int i82092aa_module_init(void)
 691{
 692        return pci_register_driver(&i82092aa_pci_driver);
 693}
 694
 695static void i82092aa_module_exit(void)
 696{
 697        enter("i82092aa_module_exit");
 698        pci_unregister_driver(&i82092aa_pci_driver);
 699        if (sockets[0].io_base>0)
 700                         release_region(sockets[0].io_base, 2);
 701        leave("i82092aa_module_exit");
 702}
 703
 704module_init(i82092aa_module_init);
 705module_exit(i82092aa_module_exit);
 706
 707