text: /* $Id: hysdn_init.c,v 1.6.6.6 2001/09/23 22:24:54 kai Exp $
   *
   * Linux driver for HYSDN cards, init functions.
   *
   * Author    Werner Cornelius (werner@titro.de) for Hypercope GmbH
   * Copyright 1999 by Werner Cornelius (werner@titro.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/poll.h>
  #include <linux/vmalloc.h>
  #include <linux/slab.h>
  #include <linux/pci.h>
  
  #include "hysdn_defs.h"
  
  static struct pci_device_id hysdn_pci_tbl[] = {
  	{ PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
  	  PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_METRO, 0, 0, BD_METRO },
  	{ PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
  	  PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_CHAMP2, 0, 0, BD_CHAMP2 },
  	{ PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
  	  PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_ERGO, 0, 0, BD_ERGO },
  	{ PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
  	  PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_OLD_ERGO, 0, 0, BD_ERGO },
  
  	{ }				/* Terminating entry */
  };
  MODULE_DEVICE_TABLE(pci, hysdn_pci_tbl);
  MODULE_DESCRIPTION("ISDN4Linux: Driver for HYSDN cards");
  MODULE_AUTHOR("Werner Cornelius");
  MODULE_LICENSE("GPL");
  
  static char *hysdn_init_revision = "$Revision: 1.6.6.6 $";
  static int cardmax;		/* number of found cards */
  hysdn_card *card_root = NULL;	/* pointer to first card */
  static hysdn_card *card_last = NULL;	/* pointer to first card */
  
  
  /****************************************************************************/
  /* The module startup and shutdown code. Only compiled when used as module. */
  /* Using the driver as module is always advisable, because the booting      */
  /* image becomes smaller and the driver code is only loaded when needed.    */
  /* Additionally newer versions may be activated without rebooting.          */
  /****************************************************************************/
  
  /******************************************************/
  /* extract revision number from string for log output */
  /******************************************************/
  char *
  hysdn_getrev(const char *revision)
  {
  	char *rev;
  	char *p;
  
  	if ((p = strchr(revision, ':'))) {
  		rev = p + 2;
  		p = strchr(rev, '$');
  		*--p = 0;
  	} else
  		rev = "???";
  	return rev;
  }
  
  
  /****************************************************************************/
  /* init_module is called once when the module is loaded to do all necessary */
  /* things like autodetect...                                                */
  /* If the return value of this function is 0 the init has been successful   */
  /* and the module is added to the list in /proc/modules, otherwise an error */
  /* is assumed and the module will not be kept in memory.                    */
  /****************************************************************************/
  
  static int __devinit hysdn_pci_init_one(struct pci_dev *akt_pcidev,
  					const struct pci_device_id *ent)
  {
  	hysdn_card *card;
  	int rc;
  
  	rc = pci_enable_device(akt_pcidev);
  	if (rc)
  		return rc;
  
  	if (!(card = kzalloc(sizeof(hysdn_card), GFP_KERNEL))) {
  		printk(KERN_ERR "HYSDN: unable to alloc device mem \n");
  		rc = -ENOMEM;
  		goto err_out;
  	}
  	card->myid = cardmax;	/* set own id */
  	card->bus = akt_pcidev->bus->number;
  	card->devfn = akt_pcidev->devfn;	/* slot + function */
  	card->subsysid = akt_pcidev->subsystem_device;
  	card->irq = akt_pcidev->irq;
  	card->iobase = pci_resource_start(akt_pcidev, PCI_REG_PLX_IO_BASE);
  	card->plxbase = pci_resource_start(akt_pcidev, PCI_REG_PLX_MEM_BASE);
  	card->membase = pci_resource_start(akt_pcidev, PCI_REG_MEMORY_BASE);
  	card->brdtype = BD_NONE;	/* unknown */
  	card->debug_flags = DEF_DEB_FLAGS;	/* set default debug */
  	card->faxchans = 0;	/* default no fax channels */
  	card->bchans = 2;	/* and 2 b-channels */
  	card->brdtype = ent->driver_data;
  
  	if (ergo_inithardware(card)) {
  		printk(KERN_WARNING "HYSDN: card at io 0x%04x already in use\n", card->iobase);
  		rc = -EBUSY;
  		goto err_out_card;
  	}
  
  	cardmax++;
  	card->next = NULL;	/*end of chain */
  	if (card_last)
  		card_last->next = card;		/* pointer to next card */
  	else
  		card_root = card;
  	card_last = card;	/* new chain end */
  
  	pci_set_drvdata(akt_pcidev, card);
  	return 0;
  
  err_out_card:
  	kfree(card);
  err_out:
  	pci_disable_device(akt_pcidev);
  	return rc;
  }
  
  static void __devexit hysdn_pci_remove_one(struct pci_dev *akt_pcidev)
  {
  	hysdn_card *card = pci_get_drvdata(akt_pcidev);
  
  	pci_set_drvdata(akt_pcidev, NULL);
  
  	if (card->stopcard)
  		card->stopcard(card);
  
  #ifdef CONFIG_HYSDN_CAPI
  	hycapi_capi_release(card);
  #endif
  
  	if (card->releasehardware)
  		card->releasehardware(card);   /* free all hardware resources */
  
  	if (card == card_root) {
  		card_root = card_root->next;
  		if (!card_root)
  			card_last = NULL;
  	} else {
  		hysdn_card *tmp = card_root;
  		while (tmp) {
  			if (tmp->next == card)
  				tmp->next = card->next;
  			card_last = tmp;
  			tmp = tmp->next;
  		}
  	}
  
  	kfree(card);
  	pci_disable_device(akt_pcidev);
  }
  
  static struct pci_driver hysdn_pci_driver = {
  	.name		= "hysdn",
  	.id_table	= hysdn_pci_tbl,
  	.probe		= hysdn_pci_init_one,
  	.remove		= __devexit_p(hysdn_pci_remove_one),
  };
  
  static int hysdn_have_procfs;
  
  static int __init
  hysdn_init(void)
  {
  	char tmp[50];
  	int rc;
  
  	strcpy(tmp, hysdn_init_revision);
  	printk(KERN_NOTICE "HYSDN: module Rev: %s loaded\n", hysdn_getrev(tmp));
  	strcpy(tmp, hysdn_net_revision);
  	printk(KERN_NOTICE "HYSDN: network interface Rev: %s \n", hysdn_getrev(tmp));
  
  	rc = pci_register_driver(&hysdn_pci_driver);
  	if (rc)
  		return rc;
  
  	printk(KERN_INFO "HYSDN: %d card(s) found.\n", cardmax);
  
  	if (!hysdn_procconf_init())
  		hysdn_have_procfs = 1;
  
  #ifdef CONFIG_HYSDN_CAPI
  	if(cardmax > 0) {
  		if(hycapi_init()) {
  			printk(KERN_ERR "HYCAPI: init failed\n");
  
  			if (hysdn_have_procfs)
  				hysdn_procconf_release();
  
  			pci_unregister_driver(&hysdn_pci_driver);
  			return -ESPIPE;
  		}
  	}
  #endif /* CONFIG_HYSDN_CAPI */
  
  	return 0;		/* no error */
  }				/* init_module */
  
  
  /***********************************************************************/
  /* cleanup_module is called when the module is released by the kernel. */
  /* The routine is only called if init_module has been successful and   */
  /* the module counter has a value of 0. Otherwise this function will   */
  /* not be called. This function must release all resources still allo- */
  /* cated as after the return from this function the module code will   */
  /* be removed from memory.                                             */
  /***********************************************************************/
  static void __exit
  hysdn_exit(void)
  {
  	if (hysdn_have_procfs)
  		hysdn_procconf_release();
  
  	pci_unregister_driver(&hysdn_pci_driver);
  
  #ifdef CONFIG_HYSDN_CAPI
  	hycapi_cleanup();
  #endif /* CONFIG_HYSDN_CAPI */
  
  	printk(KERN_NOTICE "HYSDN: module unloaded\n");
  }				/* cleanup_module */
  
  module_init(hysdn_init);
  module_exit(hysdn_exit);
  