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