/* Derived from Applicom driver ac.c for SCO Unix                            */
/* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
/* Dave@mvhi.com  30/8/98                                                    */
/* $Id: ac.c,v 1.16 1999/08/28 15:11:50 dwmw2 Exp $			     */
/* This module is for Linux 2.1 and 2.2 series kernels.                      */
/*****************************************************************************/
/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
/* ceci pour reseter correctement apres une sortie sauvage                   */
/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
/* LoopCount n'etait pas initialise a 0.                                     */
/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
/*           pour liberer le bus                                             */
/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
/* adresses de base des cartes, IOCTL 6 plus complet                         */ 
/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
/* de code autre que le texte V2.6.1 en V2.8.0                               */
/*****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/pci.h>
#include <linux/wait.h>
#include <linux/init.h>
#include "applicom.h"
#ifndef LINUX_VERSION_CODE
#include <linux/version.h>
#endif

#undef DEBUG
#define DEVPRIO PZERO+8
#define FALSE 0
#define TRUE  ~FALSE 
#define MAX_BOARD 8                 /* maximum of pc board possible */
#define MAX_ISA_BOARD 4
#define LEN_RAM_IO 0x800
#define AC_MINOR 157

#ifndef PCI_VENDOR_ID_APPLICOM
#define PCI_VENDOR_ID_APPLICOM                0x1389 
#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
#define MAX_PCI_DEVICE_NUM 3
#endif

static char *applicom_pci_devnames[]={
  "PCI board", "PCI2000IBS / PCI2000CAN", "PCI2000PFB"};

MODULE_AUTHOR("David Woodhouse & Applicom International");
MODULE_DESCRIPTION("Driver for Applicom Profibus card");
MODULE_PARM(irq, "i");
MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
MODULE_PARM(mem,"i");
MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");

MODULE_SUPPORTED_DEVICE("ac");


struct applicom_board {
  unsigned long PhysIO;
  unsigned long RamIO;
#if LINUX_VERSION_CODE > 0x20300
  wait_queue_head_t FlagSleepSend;
#else
  struct wait_queue *FlagSleepSend;
#endif
  long irq;
} apbs[MAX_BOARD];

static unsigned int irq=0;                    /* interrupt number IRQ       */
static unsigned long mem=0;                   /* physical segment of board  */

static unsigned int numboards;                /* number of installed boards */
static volatile unsigned char Dummy;
#if LINUX_VERSION_CODE > 0x20300
static DECLARE_WAIT_QUEUE_HEAD (FlagSleepRec);
#else
static struct wait_queue *FlagSleepRec;
#endif
static unsigned int WriteErrorCount;          /* number of write error      */
static unsigned int ReadErrorCount;           /* number of read error       */
static unsigned int DeviceErrorCount;         /* number of device error     */

static loff_t ac_llseek(struct file *file, loff_t offset, int origin);
static int ac_open(struct inode *inode, struct file *filp);
static ssize_t ac_read (struct file *filp, char *buf, size_t count, loff_t *ptr);
static ssize_t ac_write (struct file *file, const char *buf, size_t count, loff_t *ppos);
static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
static int ac_release(struct inode *inode, struct file *file);
static void ac_interrupt(int irq, void *dev_instance, struct pt_regs *regs);

struct file_operations ac_fops={
	ac_llseek,      /* llseek */
	ac_read,        /* read */
	ac_write,       /* write */
	NULL,           /* readdir */
	NULL,           /* poll */
       	ac_ioctl,       /* ioctl */
       	NULL,           /* mmap */
	ac_open,        /* open */
	NULL,           /* flush */
	ac_release,     /* release */
	NULL            /* fsync */
};

struct miscdevice ac_miscdev={
  AC_MINOR,
  "ac",
  &ac_fops
};

int ac_register_board(unsigned long physloc, unsigned long loc, 
		      unsigned char boardno)
{
	volatile unsigned char byte_reset_it;

	if((readb(loc + CONF_END_TEST)     != 0x00) ||
	   (readb(loc + CONF_END_TEST + 1) != 0x55) ||
	   (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
	   (readb(loc + CONF_END_TEST + 3) != 0xFF))
	  return 0;


	if (!boardno)
	  boardno = readb(loc + NUMCARD_OWNER_TO_PC);

	if (!boardno && boardno > MAX_BOARD)
	  {
	    printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",boardno, physloc, MAX_BOARD);
	    return 0;
	  }

	if (apbs[boardno-1].RamIO)
	  {
	    printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
		   boardno, physloc, boardno, apbs[boardno-1].PhysIO);
	    return 0;
	  }

	boardno--;

	apbs[boardno].PhysIO = physloc;
	apbs[boardno].RamIO = loc;
#if LINUX_VERSION_CODE > 0x20300
	init_waitqueue_head(&apbs[boardno].FlagSleepSend);
#else
	apbs[boardno].FlagSleepSend = NULL;
#endif
	byte_reset_it = readb(loc + RAM_IT_TO_PC);

	numboards++;
	return 	boardno+1;
}

#ifdef MODULE

#define applicom_init init_module

void cleanup_module(void)
{
	int i;

	misc_deregister(&ac_miscdev);
	for (i=0; i< MAX_BOARD; i++)
	  {
	    if (!apbs[i].RamIO)
	      continue;
	    iounmap((void *)apbs[i].RamIO);
	    if (apbs[i].irq)
	      free_irq(apbs[i].irq,&ac_open);     
	  }
	//	printk("Removing Applicom module\n");
}

#endif /* MODULE */

int __init applicom_init(void)
{
	int i, numisa=0;
	struct pci_dev *dev = NULL;
	void *RamIO;
	int boardno;
#if LINUX_VERSION_CODE > 0x20300
#define PCI_BASE_ADDRESS(dev) (dev->resource[0].start)
#else
#define PCI_BASE_ADDRESS(dev) (dev->base_address[0])
#endif

	printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.16 1999/08/28 15:11:50 dwmw2 Exp $\n");
	
	/* No mem and irq given - check for a PCI card */
	
	while ( (dev = pci_find_device(PCI_VENDOR_ID_APPLICOM, 1, dev)))
	  {
	    //	    mem = dev->base_address[0];
	    // irq = dev->irq;

	    RamIO = ioremap(PCI_BASE_ADDRESS(dev), LEN_RAM_IO);

	    if (!RamIO) {
	      printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", PCI_BASE_ADDRESS(dev));
	      return -EIO;
	    }
	    
	    printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
		   applicom_pci_devnames[dev->device-1], PCI_BASE_ADDRESS(dev), 
		   dev->irq);

	    if (!(boardno = ac_register_board(PCI_BASE_ADDRESS(dev),
					      (unsigned long)RamIO,0)))
	      {
		printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
		iounmap(RamIO);
		continue;
	      }
	    
	    if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &ac_open))
	      {
		printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
		iounmap(RamIO);
		apbs[boardno-1].RamIO = 0;
		continue;
	      }

	    /* Enable interrupts. */

	    writeb(0x40, apbs[boardno-1].RamIO + RAM_IT_FROM_PC);

	    apbs[boardno-1].irq = dev->irq;
	  }
	
	/* Finished with PCI cards. If none registered, 
	 * and there was no mem/irq specified, exit */

	if (!mem || !irq)
	  {
	    if (numboards)
	      goto fin;
	    else
	      {
		printk(KERN_INFO "ac.o: No PCI boards found.\n");
		printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
		return -ENXIO;
	      }
	  }
	
	/* Now try the specified ISA cards */

	RamIO = ioremap(mem, LEN_RAM_IO * MAX_ISA_BOARD); 

	if (!RamIO) {
	  printk(KERN_INFO "ac.o: Failed to ioremap ISA memory space at 0x%lx\n",mem);
	}
	
	for (i=0; i< MAX_ISA_BOARD; i++)
	  {
	    RamIO = ioremap(mem+ (LEN_RAM_IO*i), LEN_RAM_IO); 

	    if (!RamIO) {
	      printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n",i+1);
	      continue;
	    }

	    if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
					      (unsigned long)RamIO,i+1))) {
	      iounmap(RamIO);
	      continue;
	    }
	    
	    printk("Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);

	    if (!numisa)
	      {
		if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &ac_open))
		  {
		    printk("Could not allocate IRQ %d for ISA Applicom device.\n", irq);
		    iounmap((void *)RamIO);
		    apbs[boardno-1].RamIO = 0;
		  }
		apbs[boardno-1].irq=irq;
	      }
	    else
	      apbs[boardno-1].irq=0;

	    numisa++;
	  }

	if (!numisa)
	  printk("ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);

#if LINUX_VERSION_CODE > 0x20300
	init_waitqueue_head(&FlagSleepRec);
#else
	FlagSleepRec     = NULL;
#endif
	WriteErrorCount  = 0;
	ReadErrorCount   = 0;
	DeviceErrorCount = 0;

fin:
	if (numboards)
	  {
	    misc_register (&ac_miscdev);
	    for (i=0; i<MAX_BOARD; i++)
	      {
		int serial;
		char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];

		if (!apbs[i].RamIO)
		  continue;
		
		for(serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
		  boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
		boardname[serial]=0;
		

		printk("Applicom board %d: %s, PROM V%d.%d",
		       i+1, boardname,
		       (int)(readb(apbs[i].RamIO + VERS) >> 4),
		       (int)(readb(apbs[i].RamIO + VERS) & 0xF));

		serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
		  (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
		  (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
		
		if (serial != 0)
		    printk (" S/N %d\n", serial);
		else
		  printk("\n");
	      }
	    return 0;
	  }
	
	else
	  return -ENXIO;
}


#ifndef MODULE
__initcall (applicom_init);
#endif

static loff_t ac_llseek(struct file *file, loff_t offset, int origin)
{
	return -ESPIPE;
}

static int ac_open(struct inode *inode, struct file *filp)
{
	MOD_INC_USE_COUNT;
	return 0;
}

static int ac_release(struct inode *inode, struct file *file)
{
	MOD_DEC_USE_COUNT;
	return 0;
}


static ssize_t ac_write (struct file *file, const char *buf, size_t count, loff_t *ppos)
{
  unsigned int NumCard;                /* Board number 1 -> 8           */
  unsigned int IndexCard;              /* Index board number 0 -> 7     */
  unsigned char TicCard;               /* Board TIC to send             */
  unsigned long flags;                 /* Current priority              */
  struct st_ram_io st_loc;
  struct mailbox tmpmailbox;

  if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
	  printk("Hmmm. write() of Applicom card, length %d != expected %d\n",count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
	  return -EINVAL;
  }

  if(copy_from_user (&st_loc, buf, sizeof(struct st_ram_io))) {
	  return -EFAULT;
  }
  if(copy_from_user (&tmpmailbox, &buf[sizeof(struct st_ram_io)], sizeof(struct mailbox))) {
	  return -EFAULT;
  }

  NumCard   = st_loc.num_card;         /* board number to send          */
  TicCard   = st_loc.tic_des_from_pc;  /* tic number to send            */
  IndexCard = NumCard -1;
  if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
  {                                    /* User board number not OK      */
    // printk("Write to invalid Applicom board %d\n", NumCard);
    return -EINVAL;                    /* Return error code user buffer */
  }
	  
#ifdef DEBUG
  {
    int c;
    
    printk("Write to applicom card #%d. struct st_ram_io follows:",NumCard);
    
    
    
    for (c=0; c< sizeof(struct st_ram_io);)
      {
	printk("\n%5.5X: %2.2X",c,((unsigned char *)&st_loc)[c]);
	
	for (c++ ; c%8 && c<sizeof(struct st_ram_io); c++)
	  {
	    printk(" %2.2X",((unsigned char *)&st_loc)[c]);
	  }
      }

	   printk("\nstruct mailbox follows:");
	 
    for (c=0; c< sizeof(struct mailbox);)
      {
	printk("\n%5.5X: %2.2X",c,((unsigned char *)&tmpmailbox)[c]);
	
	for (c++ ; c%8 && c<sizeof(struct mailbox); c++)
	  {
	    printk(" %2.2X",((unsigned char *)&tmpmailbox)[c]);
	  }
      }
    
    printk("\n");
  }
           	  
#endif

  save_flags (flags);
  cli();                               /* disable interrupt             */

  if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2)  /* Test octet ready correct */
  {
    Dummy = readb(apbs[IndexCard].RamIO + VERS);
    restore_flags(flags);
    printk("APPLICOM driver write error board %d, DataFromPcReady = %d\n",
           IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
    DeviceErrorCount++;
    return -EIO;
  }
  while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0)
  {
    Dummy = readb(apbs[IndexCard].RamIO + VERS);
    restore_flags(flags);
    interruptible_sleep_on (&apbs[IndexCard].FlagSleepSend);
    if (signal_pending(current))
      return -EINTR;
    save_flags(flags);
    cli();
  }
  writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);

  //  memcpy_toio ((void *)apbs[IndexCard].PtrRamFromPc, (void *)&tmpmailbox, sizeof(struct mailbox));
  {
    unsigned char *from = (unsigned char *)&tmpmailbox;
    unsigned long to = (unsigned long)apbs[IndexCard].RamIO + RAM_FROM_PC;
    int c;

    for (c=0; c<sizeof(struct mailbox) ; c++)
      writeb(*(from++), to++);
  }
  writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
  writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
  writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
  writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
  writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
  writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
  Dummy = readb(apbs[IndexCard].RamIO + VERS);
  restore_flags (flags);
  return 0;
}

static ssize_t ac_read (struct file *filp, char *buf, size_t count, loff_t *ptr)
{
  unsigned int NumCard;                /* board number 1 -> 8         */
  unsigned int IndexCard;              /* index board number 0 -> 7   */
  unsigned long flags;
  unsigned int i;
  unsigned char tmp=0;
  struct st_ram_io st_loc;
  struct mailbox tmpmailbox;           /* bounce buffer - can't copy to user space with cli() */


  if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
	  printk("Hmmm. read() of Applicom card, length %d != expected %d\n",count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
	  return -EINVAL;
  }

  save_flags(flags);
  cli();
  
  i = 0;

  while (tmp != 2)
    {
      for (i=0; i < MAX_BOARD; i++)
	{
	  if (!apbs[i].RamIO)
	    continue;
	  
	  tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
	  
	  if (tmp == 2)
	    break;
	  
	  if (tmp > 2)  /* Test octet ready correct */
	    {
	      Dummy = readb(apbs[i].RamIO + VERS);
	      restore_flags(flags);
	      printk("APPLICOM driver read error board %d, DataToPcReady = %d\n",
		     i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
	      DeviceErrorCount++;
	      return -EIO;
	    }
	  Dummy = readb(apbs[i].RamIO + VERS);

	}
      if (tmp != 2)
	{
	  restore_flags(flags);
	  interruptible_sleep_on (&FlagSleepRec);
	  if (signal_pending(current))
	    return -EINTR;
	  save_flags(flags);
	  cli();
	}
    }

  IndexCard = i;
  NumCard   = i+1;
  st_loc.tic_owner_to_pc     = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
  st_loc.numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);


  //  memcpy_fromio(&tmpmailbox, apbs[IndexCard].PtrRamToPc, sizeof(struct mailbox));
 {
    unsigned long from = (unsigned long)apbs[IndexCard].RamIO + RAM_TO_PC;
    unsigned char *to = (unsigned char *)&tmpmailbox;
    int c;

    for (c=0; c<sizeof(struct mailbox) ; c++)
      *(to++) = readb(from++);
  }
  writeb(1,apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
  writeb(1,apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
  writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
  writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
	 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
  writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
  writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
  writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
  Dummy = readb(apbs[IndexCard].RamIO + VERS);
  restore_flags(flags);

#ifdef DEBUG
  { int c;

    printk("Read from applicom card #%d. struct st_ram_io follows:",NumCard);
    
    for (c=0; c< sizeof(struct st_ram_io);)
      {
	printk("\n%5.5X: %2.2X",c,((unsigned char *)&st_loc)[c]);
	
	for (c++ ; c%8 && c<sizeof(struct st_ram_io); c++)
	  {
	    printk(" %2.2X",((unsigned char *)&st_loc)[c]);
	  }
      }

	   printk("\nstruct mailbox follows:");
	 
    for (c=0; c< sizeof(struct mailbox);)
      {
	printk("\n%5.5X: %2.2X",c,((unsigned char *)&tmpmailbox)[c]);
	
	for (c++ ; c%8 && c<sizeof(struct mailbox); c++)
	  {
	    printk(" %2.2X",((unsigned char *)&tmpmailbox)[c]);
	  }
      }
    printk("\n");
    
  }
#endif
           	  

  /* Je suis stupide. DW. */

  if(copy_to_user (buf, &st_loc, sizeof(struct st_ram_io)))
    return -EFAULT;
  if(copy_to_user (&buf[sizeof(struct st_ram_io)], &tmpmailbox, sizeof(struct mailbox)))
    return -EFAULT;

  return 0;
}

static void ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
{
  unsigned int i;
  unsigned int FlagInt;
  unsigned int LoopCount;
  //  volatile unsigned char ResetIntBoard;
	
  //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
  
  LoopCount = 0;
  // for(i=boardno;i<MAX_BOARD;i++)         /* loop for not configured board   */
  //  if (apbs[i].RamIO)
  //    ResetIntBoard = *apbs[i].PtrRamItToPc;    /* reset interrupt of unused boards */

  do
  {
    FlagInt = FALSE;
    for(i=0;i<MAX_BOARD;i++)
    {
      if (!apbs[i].RamIO)
	  continue;

      if(readb(apbs[i].RamIO + RAM_IT_TO_PC) != 0)
	FlagInt = TRUE;
      writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);

      if(readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2)
	{
        printk("APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
               i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
        DeviceErrorCount++;
      }
      if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
	 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6))
      {
        printk("APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
             i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
        DeviceErrorCount++;
      }
      if(readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2)         /* mailbox sent by the card ?   */
      {
         wake_up_interruptible(&FlagSleepRec);
      }
      if(readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0)       /* ram i/o free for write by pc ? */
      {
        if(waitqueue_active(&apbs[i].FlagSleepSend))                /* process sleep during read ?    */
        {
          wake_up_interruptible(&apbs[i].FlagSleepSend);
        }
      }
      Dummy = readb(apbs[i].RamIO + VERS);

      if(readb(apbs[i].RamIO + RAM_IT_TO_PC))
	i--;        /* There's another int waiting on this card */
    }
    if(FlagInt) LoopCount = 0;
    else        LoopCount++;
  }
  while(LoopCount < 2);
}


static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)

{                                           /* @ ADG ou ATO selon le cas */
  int i;
  unsigned char IndexCard;
  unsigned long pmem ;
  volatile unsigned char byte_reset_it;
  struct st_ram_io adgl ;
  unsigned char TmpRamIo[sizeof(struct st_ram_io)];


  if (copy_from_user (&adgl, (void *)arg,sizeof(struct st_ram_io)))
      return -EFAULT;

  IndexCard = adgl.num_card-1;
  if(cmd != 0 && cmd != 6 &&
	((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO))
  {
    printk("APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
    printk("apbs[%d].RamIO = %lx\n",IndexCard, apbs[IndexCard].RamIO);
    return -EINVAL;
  }

  switch( cmd )
  {
    case 0 :
      pmem = apbs[IndexCard].RamIO;
      for(i=0;i<sizeof(struct st_ram_io);i++)TmpRamIo[i]=readb(pmem++);
      if (copy_to_user((void *)arg, TmpRamIo, sizeof(struct st_ram_io)))
	      return -EFAULT;
      break;
    case 1 :
      pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
      for (i=0;i<4;i++)
	adgl.conf_end_test[i] = readb(pmem++);
      for (i=0;i<2;i++)
	adgl.error_code[i] = readb(pmem++);
      for (i=0;i<4;i++)
	adgl.parameter_error[i] = readb(pmem++);
      pmem = apbs[IndexCard].RamIO + VERS;
      adgl.vers = readb(pmem);
      pmem = apbs[IndexCard].RamIO + TYPE_CARD;
      for (i=0;i<20;i++)
        adgl.reserv1[i] = readb(pmem++);
      *(int *)&adgl.reserv1[20] =  
	(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
	(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
	(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );

      if (copy_to_user ((void *)arg, &adgl, sizeof(struct st_ram_io)))
	      return -EFAULT;
      break;
    case 2 :
      pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
      for (i=0;i<10;i++)
	writeb(0xff, pmem++);
      writeb(adgl.data_from_pc_ready, 
	     apbs[IndexCard].RamIO + DATA_FROM_PC_READY);

      writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
#if LINUX_VERSION_CODE > 0x20300
      init_waitqueue_head (&FlagSleepRec);
#else
      FlagSleepRec     = NULL;
#endif
      for (i=0;i<MAX_BOARD;i++)
      {
	if (apbs[i].RamIO)
	  {
#if LINUX_VERSION_CODE > 0x20300
	    init_waitqueue_head (&apbs[i].FlagSleepSend);
#else
	    apbs[i].FlagSleepSend = NULL;
#endif
	    byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
	  }
      }
      break ;
    case 3 :
      pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
      writeb(adgl.tic_des_from_pc, pmem);
      break;
    case 4 :
      pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
      adgl.tic_owner_to_pc     = readb(pmem++);
      adgl.numcard_owner_to_pc = readb(pmem);
      if (copy_to_user ((void *)arg, &adgl,sizeof(struct st_ram_io)))
	      return -EFAULT;
      break;
    case 5 :
      writeb(adgl.num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
      writeb(adgl.num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
      writeb(adgl.num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
      writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
      writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
      break ;
    case 6  :
      printk("APPLICOM driver release .... V2.8.0\n");
      printk("Number of installed boards . %d\n",(int)numboards);
      printk("Segment of board ........... %X\n",(int)mem);
      printk("Interrupt IRQ number ....... %d\n",(int)irq);
      for(i=0;i<MAX_BOARD;i++)
      {
	int serial;
	char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];

	if (!apbs[i].RamIO)
	  continue;

	
	for(serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
	  boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
	boardname[serial]=0;
	
	
        printk("Prom version board %d ....... V%d.%d %s",
               i+1,
               (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
               (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
               boardname);


	serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
	  (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
	  (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );

        if (serial != 0)
          printk (" S/N %d\n", serial);
        else
          printk("\n");
      }
      if(DeviceErrorCount != 0)
        printk("DeviceErrorCount ........... %d\n",DeviceErrorCount);
      if(ReadErrorCount != 0)
        printk("ReadErrorCount ............. %d\n",ReadErrorCount);
      if(WriteErrorCount != 0)
        printk("WriteErrorCount ............ %d\n",WriteErrorCount);
      if(waitqueue_active(&FlagSleepRec))
        printk("Process in read pending\n");
      for(i=0;i<MAX_BOARD;i++)
      {
	if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
          printk("Process in write pending board %d\n",i+1);
      }
      break;
    default :
      printk("APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
      return -EINVAL;
      break;
  }
  Dummy = readb(apbs[IndexCard].RamIO + VERS);
  return 0;
}

#ifndef MODULE
static int __init applicom_setup(char *str)
{
	int ints[4];
	
	(void)get_options(str, 4, ints);

	if (ints[0] > 2) {
		printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
	}
		
	if (ints[0] < 2) {
		printk("applicom numargs: %d\n", ints[0]);
		return 0;
	}
	
	mem=ints[1];
	irq=ints[2];
	return 1;
}
#if LINUX_VERSION_CODE > 0x20300
__setup("applicom=", applicom_setup);
#endif
#endif /* MODULE */