text: /* $Id: //WIFI_SOC/MP/SDK_4_3_0_0/RT288x_SDK/source/linux-2.6.36.x/drivers/isdn/hardware/eicon/divasmain.c#1 $
   *
   * Low level driver for Eicon DIVA Server ISDN cards.
   *
   * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
   * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
   *
   * This software may be used and distributed according to the terms
   * of the GNU General Public License, incorporated herein by reference.
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <asm/uaccess.h>
  #include <asm/io.h>
  #include <linux/ioport.h>
  #include <linux/workqueue.h>
  #include <linux/pci.h>
  #include <linux/interrupt.h>
  #include <linux/list.h>
  #include <linux/poll.h>
  #include <linux/kmod.h>
  
  #include "platform.h"
  #undef ID_MASK
  #undef N_DATA
  #include "pc.h"
  #include "di_defs.h"
  #include "divasync.h"
  #include "diva.h"
  #include "di.h"
  #include "io.h"
  #include "xdi_msg.h"
  #include "xdi_adapter.h"
  #include "xdi_vers.h"
  #include "diva_dma.h"
  #include "diva_pci.h"
  
  static char *main_revision = "$Revision: #1 $";
  
  static int major;
  
  static int dbgmask;
  
  MODULE_DESCRIPTION("Kernel driver for Eicon DIVA Server cards");
  MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
  MODULE_LICENSE("GPL");
  
  module_param(dbgmask, int, 0);
  MODULE_PARM_DESC(dbgmask, "initial debug mask");
  
  static char *DRIVERNAME =
      "Eicon DIVA Server driver (http://www.melware.net)";
  static char *DRIVERLNAME = "divas";
  static char *DEVNAME = "Divas";
  char *DRIVERRELEASE_DIVAS = "2.0";
  
  extern irqreturn_t diva_os_irq_wrapper(int irq, void *context);
  extern int create_divas_proc(void);
  extern void remove_divas_proc(void);
  extern void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf);
  extern int divasfunc_init(int dbgmask);
  extern void divasfunc_exit(void);
  
  typedef struct _diva_os_thread_dpc {
  	struct tasklet_struct divas_task;
  	diva_os_soft_isr_t *psoft_isr;
  } diva_os_thread_dpc_t;
  
  /* --------------------------------------------------------------------------
      PCI driver interface section
     -------------------------------------------------------------------------- */
  /*
    vendor, device	Vendor and device ID to match (or PCI_ANY_ID)
    subvendor,	Subsystem vendor and device ID to match (or PCI_ANY_ID)
    subdevice
    class,		Device class to match. The class_mask tells which bits
    class_mask	of the class are honored during the comparison.
    driver_data	Data private to the driver.
    */
  
  #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2)
  #define PCI_DEVICE_ID_EICON_MAESTRAP_2       0xE015
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_4BRI_VOIP)
  #define PCI_DEVICE_ID_EICON_4BRI_VOIP        0xE016
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_4BRI_2_VOIP)
  #define PCI_DEVICE_ID_EICON_4BRI_2_VOIP      0xE017
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2)
  #define PCI_DEVICE_ID_EICON_BRI2M_2          0xE018
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP)
  #define PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP  0xE019
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_2F)
  #define PCI_DEVICE_ID_EICON_2F               0xE01A
  #endif
  
  #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2_VOIP)
  #define PCI_DEVICE_ID_EICON_BRI2M_2_VOIP     0xE01B
  #endif
  
  /*
    This table should be sorted by PCI device ID
    */
  static struct pci_device_id divas_pci_tbl[] = {
  	/* Diva Server BRI-2M PCI 0xE010 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRA),
  		CARDTYPE_MAESTRA_PCI },
  	/* Diva Server 4BRI-8M PCI 0xE012 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRAQ),
  		CARDTYPE_DIVASRV_Q_8M_PCI },
  	/* Diva Server 4BRI-8M 2.0 PCI 0xE013 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRAQ_U),
  		CARDTYPE_DIVASRV_Q_8M_V2_PCI },
  	/* Diva Server PRI-30M PCI 0xE014 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRAP),
  		CARDTYPE_DIVASRV_P_30M_PCI },
  	/* Diva Server PRI 2.0 adapter 0xE015 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2),
  		CARDTYPE_DIVASRV_P_30M_V2_PCI },
  	/* Diva Server Voice 4BRI-8M PCI 0xE016 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_4BRI_VOIP),
  		CARDTYPE_DIVASRV_VOICE_Q_8M_PCI },
  	/* Diva Server Voice 4BRI-8M 2.0 PCI 0xE017 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_4BRI_2_VOIP),
  		CARDTYPE_DIVASRV_VOICE_Q_8M_V2_PCI },
  	/* Diva Server BRI-2M 2.0 PCI 0xE018 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_BRI2M_2),
  		CARDTYPE_DIVASRV_B_2M_V2_PCI },
  	/* Diva Server Voice PRI 2.0 PCI 0xE019 */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP),
  		CARDTYPE_DIVASRV_VOICE_P_30M_V2_PCI },
  	/* Diva Server 2FX 0xE01A */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_2F),
  		CARDTYPE_DIVASRV_B_2F_PCI },
  	/* Diva Server Voice BRI-2M 2.0 PCI 0xE01B */
  	{ PCI_VDEVICE(EICON, PCI_DEVICE_ID_EICON_BRI2M_2_VOIP),
  		CARDTYPE_DIVASRV_VOICE_B_2M_V2_PCI },
  	{ 0, }			/* 0 terminated list. */
  };
  MODULE_DEVICE_TABLE(pci, divas_pci_tbl);
  
  static int divas_init_one(struct pci_dev *pdev,
  			  const struct pci_device_id *ent);
  static void __devexit divas_remove_one(struct pci_dev *pdev);
  
  static struct pci_driver diva_pci_driver = {
  	.name     = "divas",
  	.probe    = divas_init_one,
  	.remove   = __devexit_p(divas_remove_one),
  	.id_table = divas_pci_tbl,
  };
  
  /*********************************************************
   ** little helper functions
   *********************************************************/
  static char *getrev(const char *revision)
  {
  	char *rev;
  	char *p;
  	if ((p = strchr(revision, ':'))) {
  		rev = p + 2;
  		p = strchr(rev, '$');
  		*--p = 0;
  	} else
  		rev = "1.0";
  	return rev;
  }
  
  void diva_log_info(unsigned char *format, ...)
  {
  	va_list args;
  	unsigned char line[160];
  
  	va_start(args, format);
  	vsnprintf(line, sizeof(line), format, args);
  	va_end(args);
  
  	printk(KERN_INFO "%s: %s\n", DRIVERLNAME, line);
  }
  
  void divas_get_version(char *p)
  {
  	char tmprev[32];
  
  	strcpy(tmprev, main_revision);
  	sprintf(p, "%s: %s(%s) %s(%s) major=%d\n", DRIVERLNAME, DRIVERRELEASE_DIVAS,
  		getrev(tmprev), diva_xdi_common_code_build, DIVA_BUILD, major);
  }
  
  /* --------------------------------------------------------------------------
      PCI Bus services  
     -------------------------------------------------------------------------- */
  byte diva_os_get_pci_bus(void *pci_dev_handle)
  {
  	struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
  	return ((byte) pdev->bus->number);
  }
  
  byte diva_os_get_pci_func(void *pci_dev_handle)
  {
  	struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
  	return ((byte) pdev->devfn);
  }
  
  unsigned long divasa_get_pci_irq(unsigned char bus, unsigned char func,
  				 void *pci_dev_handle)
  {
  	unsigned char irq = 0;
  	struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
  
  	irq = dev->irq;
  
  	return ((unsigned long) irq);
  }
  
  unsigned long divasa_get_pci_bar(unsigned char bus, unsigned char func,
  				 int bar, void *pci_dev_handle)
  {
  	unsigned long ret = 0;
  	struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
  
  	if (bar < 6) {
  		ret = dev->resource[bar].start;
  	}
  
  	DBG_TRC(("GOT BAR[%d]=%08x", bar, ret));
  
  	{
  		unsigned long type = (ret & 0x00000001);
  		if (type & PCI_BASE_ADDRESS_SPACE_IO) {
  			DBG_TRC(("  I/O"));
  			ret &= PCI_BASE_ADDRESS_IO_MASK;
  		} else {
  			DBG_TRC(("  memory"));
  			ret &= PCI_BASE_ADDRESS_MEM_MASK;
  		}
  		DBG_TRC(("  final=%08x", ret));
  	}
  
  	return (ret);
  }
  
  void PCIwrite(byte bus, byte func, int offset, void *data, int length,
  	      void *pci_dev_handle)
  {
  	struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
  
  	switch (length) {
  	case 1:		/* byte */
  		pci_write_config_byte(dev, offset,
  				      *(unsigned char *) data);
  		break;
  	case 2:		/* word */
  		pci_write_config_word(dev, offset,
  				      *(unsigned short *) data);
  		break;
  	case 4:		/* dword */
  		pci_write_config_dword(dev, offset,
  				       *(unsigned int *) data);
  		break;
  
  	default:		/* buffer */
  		if (!(length % 4) && !(length & 0x03)) {	/* Copy as dword */
  			dword *p = (dword *) data;
  			length /= 4;
  
  			while (length--) {
  				pci_write_config_dword(dev, offset,
  						       *(unsigned int *)
  						       p++);
  			}
  		} else {	/* copy as byte stream */
  			byte *p = (byte *) data;
  
  			while (length--) {
  				pci_write_config_byte(dev, offset,
  						      *(unsigned char *)
  						      p++);
  			}
  		}
  	}
  }
  
  void PCIread(byte bus, byte func, int offset, void *data, int length,
  	     void *pci_dev_handle)
  {
  	struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
  
  	switch (length) {
  	case 1:		/* byte */
  		pci_read_config_byte(dev, offset, (unsigned char *) data);
  		break;
  	case 2:		/* word */
  		pci_read_config_word(dev, offset, (unsigned short *) data);
  		break;
  	case 4:		/* dword */
  		pci_read_config_dword(dev, offset, (unsigned int *) data);
  		break;
  
  	default:		/* buffer */
  		if (!(length % 4) && !(length & 0x03)) {	/* Copy as dword */
  			dword *p = (dword *) data;
  			length /= 4;
  
  			while (length--) {
  				pci_read_config_dword(dev, offset,
  						      (unsigned int *)
  						      p++);
  			}
  		} else {	/* copy as byte stream */
  			byte *p = (byte *) data;
  
  			while (length--) {
  				pci_read_config_byte(dev, offset,
  						     (unsigned char *)
  						     p++);
  			}
  		}
  	}
  }
  
  /*
    Init map with DMA pages. It is not problem if some allocations fail -
    the channels that will not get one DMA page will use standard PIO
    interface
    */
  static void *diva_pci_alloc_consistent(struct pci_dev *hwdev,
  				       size_t size,
  				       dma_addr_t * dma_handle,
  				       void **addr_handle)
  {
  	void *addr = pci_alloc_consistent(hwdev, size, dma_handle);
  
  	*addr_handle = addr;
  
  	return (addr);
  }
  
  void diva_init_dma_map(void *hdev,
  		       struct _diva_dma_map_entry **ppmap, int nentries)
  {
  	struct pci_dev *pdev = (struct pci_dev *) hdev;
  	struct _diva_dma_map_entry *pmap =
  	    diva_alloc_dma_map(hdev, nentries);
  
  	if (pmap) {
  		int i;
  		dma_addr_t dma_handle;
  		void *cpu_addr;
  		void *addr_handle;
  
  		for (i = 0; i < nentries; i++) {
  			if (!(cpu_addr = diva_pci_alloc_consistent(pdev,
  								   PAGE_SIZE,
  								   &dma_handle,
  								   &addr_handle)))
  			{
  				break;
  			}
  			diva_init_dma_map_entry(pmap, i, cpu_addr,
  						(dword) dma_handle,
  						addr_handle);
  			DBG_TRC(("dma map alloc [%d]=(%08lx:%08x:%08lx)",
  				 i, (unsigned long) cpu_addr,
  				 (dword) dma_handle,
  				 (unsigned long) addr_handle))}
  	}
  
  	*ppmap = pmap;
  }
  
  /*
    Free all contained in the map entries and memory used by the map
    Should be always called after adapter removal from DIDD array
    */
  void diva_free_dma_map(void *hdev, struct _diva_dma_map_entry *pmap)
  {
  	struct pci_dev *pdev = (struct pci_dev *) hdev;
  	int i;
  	dword phys_addr;
  	void *cpu_addr;
  	dma_addr_t dma_handle;
  	void *addr_handle;
  
  	for (i = 0; (pmap != NULL); i++) {
  		diva_get_dma_map_entry(pmap, i, &cpu_addr, &phys_addr);
  		if (!cpu_addr) {
  			break;
  		}
  		addr_handle = diva_get_entry_handle(pmap, i);
  		dma_handle = (dma_addr_t) phys_addr;
  		pci_free_consistent(pdev, PAGE_SIZE, addr_handle,
  				    dma_handle);
  		DBG_TRC(("dma map free [%d]=(%08lx:%08x:%08lx)", i,
  			 (unsigned long) cpu_addr, (dword) dma_handle,
  			 (unsigned long) addr_handle))
  	}
  
  	diva_free_dma_mapping(pmap);
  }
  
  
  /*********************************************************
   ** I/O port utilities  
   *********************************************************/
  
  int
  diva_os_register_io_port(void *adapter, int on, unsigned long port,
  			 unsigned long length, const char *name, int id)
  {
  	if (on) {
  		if (!request_region(port, length, name)) {
  			DBG_ERR(("A: I/O: can't register port=%08x", port))
  			return (-1);
  		}
  	} else {
  		release_region(port, length);
  	}
  	return (0);
  }
  
  void __iomem *divasa_remap_pci_bar(diva_os_xdi_adapter_t *a, int id, unsigned long bar, unsigned long area_length)
  {
  	void __iomem *ret = ioremap(bar, area_length);
  	DBG_TRC(("remap(%08x)->%p", bar, ret));
  	return (ret);
  }
  
  void divasa_unmap_pci_bar(void __iomem *bar)
  {
  	if (bar) {
  		iounmap(bar);
  	}
  }
  
  /*********************************************************
   ** I/O port access 
   *********************************************************/
  byte __inline__ inpp(void __iomem *addr)
  {
  	return (inb((unsigned long) addr));
  }
  
  word __inline__ inppw(void __iomem *addr)
  {
  	return (inw((unsigned long) addr));
  }
  
  void __inline__ inppw_buffer(void __iomem *addr, void *P, int length)
  {
  	insw((unsigned long) addr, (word *) P, length >> 1);
  }
  
  void __inline__ outppw_buffer(void __iomem *addr, void *P, int length)
  {
  	outsw((unsigned long) addr, (word *) P, length >> 1);
  }
  
  void __inline__ outppw(void __iomem *addr, word w)
  {
  	outw(w, (unsigned long) addr);
  }
  
  void __inline__ outpp(void __iomem *addr, word p)
  {
  	outb(p, (unsigned long) addr);
  }
  
  /* --------------------------------------------------------------------------
      IRQ request / remove  
     -------------------------------------------------------------------------- */
  int diva_os_register_irq(void *context, byte irq, const char *name)
  {
  	int result = request_irq(irq, diva_os_irq_wrapper,
  				 IRQF_DISABLED | IRQF_SHARED, name, context);
  	return (result);
  }
  
  void diva_os_remove_irq(void *context, byte irq)
  {
  	free_irq(irq, context);
  }
  
  /* --------------------------------------------------------------------------
      DPC framework implementation
     -------------------------------------------------------------------------- */
  static void diva_os_dpc_proc(unsigned long context)
  {
  	diva_os_thread_dpc_t *psoft_isr = (diva_os_thread_dpc_t *) context;
  	diva_os_soft_isr_t *pisr = psoft_isr->psoft_isr;
  
  	(*(pisr->callback)) (pisr, pisr->callback_context);
  }
  
  int diva_os_initialize_soft_isr(diva_os_soft_isr_t * psoft_isr,
  				diva_os_soft_isr_callback_t callback,
  				void *callback_context)
  {
  	diva_os_thread_dpc_t *pdpc;
  
  	pdpc = (diva_os_thread_dpc_t *) diva_os_malloc(0, sizeof(*pdpc));
  	if (!(psoft_isr->object = pdpc)) {
  		return (-1);
  	}
  	memset(pdpc, 0x00, sizeof(*pdpc));
  	psoft_isr->callback = callback;
  	psoft_isr->callback_context = callback_context;
  	pdpc->psoft_isr = psoft_isr;
  	tasklet_init(&pdpc->divas_task, diva_os_dpc_proc, (unsigned long)pdpc);
  
  	return (0);
  }
  
  int diva_os_schedule_soft_isr(diva_os_soft_isr_t * psoft_isr)
  {
  	if (psoft_isr && psoft_isr->object) {
  		diva_os_thread_dpc_t *pdpc =
  		    (diva_os_thread_dpc_t *) psoft_isr->object;
  
  		tasklet_schedule(&pdpc->divas_task);
  	}
  
  	return (1);
  }
  
  int diva_os_cancel_soft_isr(diva_os_soft_isr_t * psoft_isr)
  {
  	return (0);
  }
  
  void diva_os_remove_soft_isr(diva_os_soft_isr_t * psoft_isr)
  {
  	if (psoft_isr && psoft_isr->object) {
  		diva_os_thread_dpc_t *pdpc =
  		    (diva_os_thread_dpc_t *) psoft_isr->object;
  		void *mem;
  
  		tasklet_kill(&pdpc->divas_task);
  		flush_scheduled_work();
  		mem = psoft_isr->object;
  		psoft_isr->object = NULL;
  		diva_os_free(0, mem);
  	}
  }
  
  /*
   * kernel/user space copy functions
   */
  static int
  xdi_copy_to_user(void *os_handle, void __user *dst, const void *src, int length)
  {
  	if (copy_to_user(dst, src, length)) {
  		return (-EFAULT);
  	}
  	return (length);
  }
  
  static int
  xdi_copy_from_user(void *os_handle, void *dst, const void __user *src, int length)
  {
  	if (copy_from_user(dst, src, length)) {
  		return (-EFAULT);
  	}
  	return (length);
  }
  
  /*
   * device node operations
   */
  static int divas_open(struct inode *inode, struct file *file)
  {
  	return (0);
  }
  
  static int divas_release(struct inode *inode, struct file *file)
  {
  	if (file->private_data) {
  		diva_xdi_close_adapter(file->private_data, file);
  	}
  	return (0);
  }
  
  static ssize_t divas_write(struct file *file, const char __user *buf,
  			   size_t count, loff_t * ppos)
  {
  	int ret = -EINVAL;
  
  	if (!file->private_data) {
  		file->private_data = diva_xdi_open_adapter(file, buf,
  							   count,
  							   xdi_copy_from_user);
  	}
  	if (!file->private_data) {
  		return (-ENODEV);
  	}
  
  	ret = diva_xdi_write(file->private_data, file,
  			     buf, count, xdi_copy_from_user);
  	switch (ret) {
  	case -1:		/* Message should be removed from rx mailbox first */
  		ret = -EBUSY;
  		break;
  	case -2:		/* invalid adapter was specified in this call */
  		ret = -ENOMEM;
  		break;
  	case -3:
  		ret = -ENXIO;
  		break;
  	}
  	DBG_TRC(("write: ret %d", ret));
  	return (ret);
  }
  
  static ssize_t divas_read(struct file *file, char __user *buf,
  			  size_t count, loff_t * ppos)
  {
  	int ret = -EINVAL;
  
  	if (!file->private_data) {
  		file->private_data = diva_xdi_open_adapter(file, buf,
  							   count,
  							   xdi_copy_from_user);
  	}
  	if (!file->private_data) {
  		return (-ENODEV);
  	}
  
  	ret = diva_xdi_read(file->private_data, file,
  			    buf, count, xdi_copy_to_user);
  	switch (ret) {
  	case -1:		/* RX mailbox is empty */
  		ret = -EAGAIN;
  		break;
  	case -2:		/* no memory, mailbox was cleared, last command is failed */
  		ret = -ENOMEM;
  		break;
  	case -3:		/* can't copy to user, retry */
  		ret = -EFAULT;
  		break;
  	}
  	DBG_TRC(("read: ret %d", ret));
  	return (ret);
  }
  
  static unsigned int divas_poll(struct file *file, poll_table * wait)
  {
  	if (!file->private_data) {
  		return (POLLERR);
  	}
  	return (POLLIN | POLLRDNORM);
  }
  
  static const struct file_operations divas_fops = {
  	.owner   = THIS_MODULE,
  	.llseek  = no_llseek,
  	.read    = divas_read,
  	.write   = divas_write,
  	.poll    = divas_poll,
  	.open    = divas_open,
  	.release = divas_release
  };
  
  static void divas_unregister_chrdev(void)
  {
  	unregister_chrdev(major, DEVNAME);
  }
  
  static int DIVA_INIT_FUNCTION divas_register_chrdev(void)
  {
  	if ((major = register_chrdev(0, DEVNAME, &divas_fops)) < 0)
  	{
  		printk(KERN_ERR "%s: failed to create /dev entry.\n",
  		       DRIVERLNAME);
  		return (0);
  	}
  
  	return (1);
  }
  
  /* --------------------------------------------------------------------------
      PCI driver section
     -------------------------------------------------------------------------- */
  static int __devinit divas_init_one(struct pci_dev *pdev,
  				    const struct pci_device_id *ent)
  {
  	void *pdiva = NULL;
  	u8 pci_latency;
  	u8 new_latency = 32;
  
  	DBG_TRC(("%s bus: %08x fn: %08x insertion.\n",
  		 CardProperties[ent->driver_data].Name,
  		 pdev->bus->number, pdev->devfn))
  	printk(KERN_INFO "%s: %s bus: %08x fn: %08x insertion.\n",
  		DRIVERLNAME, CardProperties[ent->driver_data].Name,
  		pdev->bus->number, pdev->devfn);
  
  	if (pci_enable_device(pdev)) {
  		DBG_TRC(("%s: %s bus: %08x fn: %08x device init failed.\n",
  			 DRIVERLNAME,
  			 CardProperties[ent->driver_data].Name,
  			 pdev->bus->number,
  			 pdev->devfn))
  		printk(KERN_ERR
  			"%s: %s bus: %08x fn: %08x device init failed.\n",
  			DRIVERLNAME,
  			CardProperties[ent->driver_data].
  			Name, pdev->bus->number,
  			pdev->devfn);
  		return (-EIO);
  	}
  
  	pci_set_master(pdev);
  
  	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
  	if (!pci_latency) {
  		DBG_TRC(("%s: bus: %08x fn: %08x fix latency.\n",
  			 DRIVERLNAME, pdev->bus->number, pdev->devfn))
  		printk(KERN_INFO
  			"%s: bus: %08x fn: %08x fix latency.\n",
  			 DRIVERLNAME, pdev->bus->number, pdev->devfn);
  		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, new_latency);
  	}
  
  	if (!(pdiva = diva_driver_add_card(pdev, ent->driver_data))) {
  		DBG_TRC(("%s: %s bus: %08x fn: %08x card init failed.\n",
  			 DRIVERLNAME,
  			 CardProperties[ent->driver_data].Name,
  			 pdev->bus->number,
  			 pdev->devfn))
  		printk(KERN_ERR
  			"%s: %s bus: %08x fn: %08x card init failed.\n",
  			DRIVERLNAME,
  			CardProperties[ent->driver_data].
  			Name, pdev->bus->number,
  			pdev->devfn);
  		return (-EIO);
  	}
  
  	pci_set_drvdata(pdev, pdiva);
  
  	return (0);
  }
  
  static void __devexit divas_remove_one(struct pci_dev *pdev)
  {
  	void *pdiva = pci_get_drvdata(pdev);
  
  	DBG_TRC(("bus: %08x fn: %08x removal.\n",
  		 pdev->bus->number, pdev->devfn))
  	printk(KERN_INFO "%s: bus: %08x fn: %08x removal.\n",
  		DRIVERLNAME, pdev->bus->number, pdev->devfn);
  
  	if (pdiva) {
  		diva_driver_remove_card(pdiva);
  	}
  
  }
  
  /* --------------------------------------------------------------------------
      Driver Load / Startup  
     -------------------------------------------------------------------------- */
  static int DIVA_INIT_FUNCTION divas_init(void)
  {
  	char tmprev[50];
  	int ret = 0;
  
  	printk(KERN_INFO "%s\n", DRIVERNAME);
  	printk(KERN_INFO "%s: Rel:%s  Rev:", DRIVERLNAME, DRIVERRELEASE_DIVAS);
  	strcpy(tmprev, main_revision);
  	printk("%s  Build: %s(%s)\n", getrev(tmprev),
  	       diva_xdi_common_code_build, DIVA_BUILD);
  	printk(KERN_INFO "%s: support for: ", DRIVERLNAME);
  #ifdef CONFIG_ISDN_DIVAS_BRIPCI
  	printk("BRI/PCI ");
  #endif
  #ifdef CONFIG_ISDN_DIVAS_PRIPCI
  	printk("PRI/PCI ");
  #endif
  	printk("adapters\n");
  
  	if (!divasfunc_init(dbgmask)) {
  		printk(KERN_ERR "%s: failed to connect to DIDD.\n",
  		       DRIVERLNAME);
  		ret = -EIO;
  		goto out;
  	}
  
  	if (!divas_register_chrdev()) {
  #ifdef MODULE
  		divasfunc_exit();
  #endif
  		ret = -EIO;
  		goto out;
  	}
  
  	if (!create_divas_proc()) {
  #ifdef MODULE
  		divas_unregister_chrdev();
  		divasfunc_exit();
  #endif
  		printk(KERN_ERR "%s: failed to create proc entry.\n",
  		       DRIVERLNAME);
  		ret = -EIO;
  		goto out;
  	}
  
  	if ((ret = pci_register_driver(&diva_pci_driver))) {
  #ifdef MODULE
  		remove_divas_proc();
  		divas_unregister_chrdev();
  		divasfunc_exit();
  #endif
  		printk(KERN_ERR "%s: failed to init pci driver.\n",
  		       DRIVERLNAME);
  		goto out;
  	}
  	printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
  
        out:
  	return (ret);
  }
  
  /* --------------------------------------------------------------------------
      Driver Unload
     -------------------------------------------------------------------------- */
  static void DIVA_EXIT_FUNCTION divas_exit(void)
  {
  	pci_unregister_driver(&diva_pci_driver);
  	remove_divas_proc();
  	divas_unregister_chrdev();
  	divasfunc_exit();
  
  	printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
  }
  
  module_init(divas_init);
  module_exit(divas_exit);
  