drivers/isdn/hysdn/hysdn_init.c

   1 /* $Id: hysdn_init.c,v 1.6.6.6 2001/09/23 22:24:54 kai Exp $
   2  *
   3  * Linux driver for HYSDN cards, init functions.
   4  *
   5  * Author    Werner Cornelius (werner@titro.de) for Hypercope GmbH
   6  * Copyright 1999 by Werner Cornelius (werner@titro.de)
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/poll.h>
  17 #include <linux/vmalloc.h>
  18 #include <linux/slab.h>
  19 #include <linux/pci.h>
  20
  21 #include "hysdn_defs.h"
  22
  23 static struct pci_device_id hysdn_pci_tbl[] = {
  24         {PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX, PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_METRO},
  25         {PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX, PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_CHAMP2},
  26         {PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX, PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_ERGO},
  27         {PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX, PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_OLD_ERGO},
  28         { }                             /* Terminating entry */
  29 };
  30 MODULE_DEVICE_TABLE(pci, hysdn_pci_tbl);
  31 MODULE_DESCRIPTION("ISDN4Linux: Driver for HYSDN cards");
  32 MODULE_AUTHOR("Werner Cornelius");
  33 MODULE_LICENSE("GPL");
  34
  35 static char *hysdn_init_revision = "$Revision: 1.6.6.6 $";
  36 static int cardmax;             /* number of found cards */
  37 hysdn_card *card_root = NULL;   /* pointer to first card */
  38
  39 /**********************************************/
  40 /* table assigning PCI-sub ids to board types */
  41 /* the last entry contains all 0              */
  42 /**********************************************/
  43 static struct {
  44         unsigned short subid;           /* PCI sub id */
  45         unsigned char cardtyp;          /* card type assigned */
  46 } pci_subid_map[] = {
  47
  48         {
  49                 PCI_SUBDEVICE_ID_HYPERCOPE_METRO, BD_METRO
  50         },
  51         {
  52                 PCI_SUBDEVICE_ID_HYPERCOPE_CHAMP2, BD_CHAMP2
  53         },
  54         {
  55                 PCI_SUBDEVICE_ID_HYPERCOPE_ERGO, BD_ERGO
  56         },
  57         {
  58                 PCI_SUBDEVICE_ID_HYPERCOPE_OLD_ERGO, BD_ERGO
  59         },
  60         {
  61                 0, 0
  62         }                       /* terminating entry */
  63 };
  64
  65
  66 /*********************************************************************/
  67 /* search_cards searches for available cards in the pci config data. */
  68 /* If a card is found, the card structure is allocated and the cards */
  69 /* ressources are reserved. cardmax is incremented.                  */
  70 /*********************************************************************/
  71 static void
  72 search_cards(void)
  73 {
  74         struct pci_dev *akt_pcidev = NULL;
  75         hysdn_card *card, *card_last;
  76         int i;
  77
  78         card_root = NULL;
  79         card_last = NULL;
  80         while ((akt_pcidev = pci_find_device(PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
  81                                              akt_pcidev)) != NULL) {
  82                 if (pci_enable_device(akt_pcidev))
  83                         continue;
  84
  85                 if (!(card = kmalloc(sizeof(hysdn_card), GFP_KERNEL))) {
  86                         printk(KERN_ERR "HYSDN: unable to alloc device mem \n");
  87                         return;
  88                 }
  89                 memset(card, 0, sizeof(hysdn_card));
  90                 card->myid = cardmax;   /* set own id */
  91                 card->bus = akt_pcidev->bus->number;
  92                 card->devfn = akt_pcidev->devfn;        /* slot + function */
  93                 card->subsysid = akt_pcidev->subsystem_device;
  94                 card->irq = akt_pcidev->irq;
  95                 card->iobase = pci_resource_start(akt_pcidev, PCI_REG_PLX_IO_BASE);
  96                 card->plxbase = pci_resource_start(akt_pcidev, PCI_REG_PLX_MEM_BASE);
  97                 card->membase = pci_resource_start(akt_pcidev, PCI_REG_MEMORY_BASE);
  98                 card->brdtype = BD_NONE;        /* unknown */
  99                 card->debug_flags = DEF_DEB_FLAGS;      /* set default debug */
 100                 card->faxchans = 0;     /* default no fax channels */
 101                 card->bchans = 2;       /* and 2 b-channels */
 102                 for (i = 0; pci_subid_map[i].subid; i++)
 103                         if (pci_subid_map[i].subid == card->subsysid) {
 104                                 card->brdtype = pci_subid_map[i].cardtyp;
 105                                 break;
 106                         }
 107                 if (card->brdtype != BD_NONE) {
 108                         if (ergo_inithardware(card)) {
 109                                 printk(KERN_WARNING "HYSDN: card at io 0x%04x already in use\n", card->iobase);
 110                                 kfree(card);
 111                                 continue;
 112                         }
 113                 } else {
 114                         printk(KERN_WARNING "HYSDN: unknown card id 0x%04x\n", card->subsysid);
 115                         kfree(card);    /* release mem */
 116                         continue;
 117                 }
 118                 cardmax++;
 119                 card->next = NULL;      /*end of chain */
 120                 if (card_last)
 121                         card_last->next = card;         /* pointer to next card */
 122                 else
 123                         card_root = card;
 124                 card_last = card;       /* new chain end */
 125         }                       /* device found */
 126 }                               /* search_cards */
 127
 128 /************************************************************************************/
 129 /* free_resources frees the acquired PCI resources and returns the allocated memory */
 130 /************************************************************************************/
 131 static void
 132 free_resources(void)
 133 {
 134         hysdn_card *card;
 135
 136         while (card_root) {
 137                 card = card_root;
 138                 if (card->releasehardware)
 139                         card->releasehardware(card);    /* free all hardware resources */
 140                 card_root = card_root->next;    /* remove card from chain */
 141                 kfree(card);    /* return mem */
 142
 143         }                       /* while card_root */
 144 }                               /* free_resources */
 145
 146 /**************************************************************************/
 147 /* stop_cards disables (hardware resets) all cards and disables interrupt */
 148 /**************************************************************************/
 149 static void
 150 stop_cards(void)
 151 {
 152         hysdn_card *card;
 153
 154         card = card_root;       /* first in chain */
 155         while (card) {
 156                 if (card->stopcard)
 157                         card->stopcard(card);
 158                 card = card->next;      /* remove card from chain */
 159         }                       /* while card */
 160 }                               /* stop_cards */
 161
 162
 163 /****************************************************************************/
 164 /* The module startup and shutdown code. Only compiled when used as module. */
 165 /* Using the driver as module is always advisable, because the booting      */
 166 /* image becomes smaller and the driver code is only loaded when needed.    */
 167 /* Additionally newer versions may be activated without rebooting.          */
 168 /****************************************************************************/
 169
 170 /******************************************************/
 171 /* extract revision number from string for log output */
 172 /******************************************************/
 173 char *
 174 hysdn_getrev(const char *revision)
 175 {
 176         char *rev;
 177         char *p;
 178
 179         if ((p = strchr(revision, ':'))) {
 180                 rev = p + 2;
 181                 p = strchr(rev, '$');
 182                 *--p = 0;
 183         } else
 184                 rev = "???";
 185         return rev;
 186 }
 187
 188
 189 /****************************************************************************/
 190 /* init_module is called once when the module is loaded to do all necessary */
 191 /* things like autodetect...                                                */
 192 /* If the return value of this function is 0 the init has been successful   */
 193 /* and the module is added to the list in /proc/modules, otherwise an error */
 194 /* is assumed and the module will not be kept in memory.                    */
 195 /****************************************************************************/
 196 static int __init
 197 hysdn_init(void)
 198 {
 199         char tmp[50];
 200
 201         strcpy(tmp, hysdn_init_revision);
 202         printk(KERN_NOTICE "HYSDN: module Rev: %s loaded\n", hysdn_getrev(tmp));
 203         strcpy(tmp, hysdn_net_revision);
 204         printk(KERN_NOTICE "HYSDN: network interface Rev: %s \n", hysdn_getrev(tmp));
 205         search_cards();
 206         printk(KERN_INFO "HYSDN: %d card(s) found.\n", cardmax);
 207
 208         if (hysdn_procconf_init()) {
 209                 free_resources();       /* proc file_sys not created */
 210                 return (-1);
 211         }
 212 #ifdef CONFIG_HYSDN_CAPI
 213         if(cardmax > 0) {
 214                 if(hycapi_init()) {
 215                         printk(KERN_ERR "HYCAPI: init failed\n");
 216                         return(-1);
 217                 }
 218         }
 219 #endif /* CONFIG_HYSDN_CAPI */
 220         return (0);             /* no error */
 221 }                               /* init_module */
 222
 223
 224 /***********************************************************************/
 225 /* cleanup_module is called when the module is released by the kernel. */
 226 /* The routine is only called if init_module has been successful and   */
 227 /* the module counter has a value of 0. Otherwise this function will   */
 228 /* not be called. This function must release all resources still allo- */
 229 /* cated as after the return from this function the module code will   */
 230 /* be removed from memory.                                             */
 231 /***********************************************************************/
 232 static void __exit
 233 hysdn_exit(void)
 234 {
 235 #ifdef CONFIG_HYSDN_CAPI
 236         hysdn_card *card;
 237 #endif /* CONFIG_HYSDN_CAPI */
 238         stop_cards();
 239 #ifdef CONFIG_HYSDN_CAPI
 240         card = card_root;       /* first in chain */
 241         while (card) {
 242                 hycapi_capi_release(card);
 243                 card = card->next;      /* remove card from chain */
 244         }                       /* while card */
 245         hycapi_cleanup();
 246 #endif /* CONFIG_HYSDN_CAPI */
 247         hysdn_procconf_release();
 248         free_resources();
 249         printk(KERN_NOTICE "HYSDN: module unloaded\n");
 250 }                               /* cleanup_module */
 251
 252 module_init(hysdn_init);
 253 module_exit(hysdn_exit);