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 = kzalloc(sizeof(hysdn_card), GFP_KERNEL))) {
  85                         printk(KERN_ERR "HYSDN: unable to alloc device mem \n");
  86                         return;
  87                 }
  88                 card->myid = cardmax;   /* set own id */
  89                 card->bus = akt_pcidev->bus->number;
  90                 card->devfn = akt_pcidev->devfn;        /* slot + function */
  91                 card->subsysid = akt_pcidev->subsystem_device;
  92                 card->irq = akt_pcidev->irq;
  93                 card->iobase = pci_resource_start(akt_pcidev, PCI_REG_PLX_IO_BASE);
  94                 card->plxbase = pci_resource_start(akt_pcidev, PCI_REG_PLX_MEM_BASE);
  95                 card->membase = pci_resource_start(akt_pcidev, PCI_REG_MEMORY_BASE);
  96                 card->brdtype = BD_NONE;        /* unknown */
  97                 card->debug_flags = DEF_DEB_FLAGS;      /* set default debug */
  98                 card->faxchans = 0;     /* default no fax channels */
  99                 card->bchans = 2;       /* and 2 b-channels */
 100                 for (i = 0; pci_subid_map[i].subid; i++)
 101                         if (pci_subid_map[i].subid == card->subsysid) {
 102                                 card->brdtype = pci_subid_map[i].cardtyp;
 103                                 break;
 104                         }
 105                 if (card->brdtype != BD_NONE) {
 106                         if (ergo_inithardware(card)) {
 107                                 printk(KERN_WARNING "HYSDN: card at io 0x%04x already in use\n", card->iobase);
 108                                 kfree(card);
 109                                 continue;
 110                         }
 111                 } else {
 112                         printk(KERN_WARNING "HYSDN: unknown card id 0x%04x\n", card->subsysid);
 113                         kfree(card);    /* release mem */
 114                         continue;
 115                 }
 116                 cardmax++;
 117                 card->next = NULL;      /*end of chain */
 118                 if (card_last)
 119                         card_last->next = card;         /* pointer to next card */
 120                 else
 121                         card_root = card;
 122                 card_last = card;       /* new chain end */
 123         }                       /* device found */
 124 }                               /* search_cards */
 125
 126 /************************************************************************************/
 127 /* free_resources frees the acquired PCI resources and returns the allocated memory */
 128 /************************************************************************************/
 129 static void
 130 free_resources(void)
 131 {
 132         hysdn_card *card;
 133
 134         while (card_root) {
 135                 card = card_root;
 136                 if (card->releasehardware)
 137                         card->releasehardware(card);    /* free all hardware resources */
 138                 card_root = card_root->next;    /* remove card from chain */
 139                 kfree(card);    /* return mem */
 140
 141         }                       /* while card_root */
 142 }                               /* free_resources */
 143
 144 /**************************************************************************/
 145 /* stop_cards disables (hardware resets) all cards and disables interrupt */
 146 /**************************************************************************/
 147 static void
 148 stop_cards(void)
 149 {
 150         hysdn_card *card;
 151
 152         card = card_root;       /* first in chain */
 153         while (card) {
 154                 if (card->stopcard)
 155                         card->stopcard(card);
 156                 card = card->next;      /* remove card from chain */
 157         }                       /* while card */
 158 }                               /* stop_cards */
 159
 160
 161 /****************************************************************************/
 162 /* The module startup and shutdown code. Only compiled when used as module. */
 163 /* Using the driver as module is always advisable, because the booting      */
 164 /* image becomes smaller and the driver code is only loaded when needed.    */
 165 /* Additionally newer versions may be activated without rebooting.          */
 166 /****************************************************************************/
 167
 168 /******************************************************/
 169 /* extract revision number from string for log output */
 170 /******************************************************/
 171 char *
 172 hysdn_getrev(const char *revision)
 173 {
 174         char *rev;
 175         char *p;
 176
 177         if ((p = strchr(revision, ':'))) {
 178                 rev = p + 2;
 179                 p = strchr(rev, '$');
 180                 *--p = 0;
 181         } else
 182                 rev = "???";
 183         return rev;
 184 }
 185
 186
 187 /****************************************************************************/
 188 /* init_module is called once when the module is loaded to do all necessary */
 189 /* things like autodetect...                                                */
 190 /* If the return value of this function is 0 the init has been successful   */
 191 /* and the module is added to the list in /proc/modules, otherwise an error */
 192 /* is assumed and the module will not be kept in memory.                    */
 193 /****************************************************************************/
 194 static int __init
 195 hysdn_init(void)
 196 {
 197         char tmp[50];
 198
 199         strcpy(tmp, hysdn_init_revision);
 200         printk(KERN_NOTICE "HYSDN: module Rev: %s loaded\n", hysdn_getrev(tmp));
 201         strcpy(tmp, hysdn_net_revision);
 202         printk(KERN_NOTICE "HYSDN: network interface Rev: %s \n", hysdn_getrev(tmp));
 203         search_cards();
 204         printk(KERN_INFO "HYSDN: %d card(s) found.\n", cardmax);
 205
 206         if (hysdn_procconf_init()) {
 207                 free_resources();       /* proc file_sys not created */
 208                 return (-1);
 209         }
 210 #ifdef CONFIG_HYSDN_CAPI
 211         if(cardmax > 0) {
 212                 if(hycapi_init()) {
 213                         printk(KERN_ERR "HYCAPI: init failed\n");
 214                         return(-1);
 215                 }
 216         }
 217 #endif /* CONFIG_HYSDN_CAPI */
 218         return (0);             /* no error */
 219 }                               /* init_module */
 220
 221
 222 /***********************************************************************/
 223 /* cleanup_module is called when the module is released by the kernel. */
 224 /* The routine is only called if init_module has been successful and   */
 225 /* the module counter has a value of 0. Otherwise this function will   */
 226 /* not be called. This function must release all resources still allo- */
 227 /* cated as after the return from this function the module code will   */
 228 /* be removed from memory.                                             */
 229 /***********************************************************************/
 230 static void __exit
 231 hysdn_exit(void)
 232 {
 233 #ifdef CONFIG_HYSDN_CAPI
 234         hysdn_card *card;
 235 #endif /* CONFIG_HYSDN_CAPI */
 236         stop_cards();
 237 #ifdef CONFIG_HYSDN_CAPI
 238         card = card_root;       /* first in chain */
 239         while (card) {
 240                 hycapi_capi_release(card);
 241                 card = card->next;      /* remove card from chain */
 242         }                       /* while card */
 243         hycapi_cleanup();
 244 #endif /* CONFIG_HYSDN_CAPI */
 245         hysdn_procconf_release();
 246         free_resources();
 247         printk(KERN_NOTICE "HYSDN: module unloaded\n");
 248 }                               /* cleanup_module */
 249
 250 module_init(hysdn_init);
 251 module_exit(hysdn_exit);