/* $Id: hysdn_init.c,v 1.1 2000/02/10 19:45:18 werner Exp $ * Linux driver for HYSDN cards, init functions. * written by Werner Cornelius (werner@titro.de) for Hypercope GmbH * * Copyright 1999 by Werner Cornelius (werner@titro.de) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Log: hysdn_init.c,v $ * Revision 1.1 2000/02/10 19:45:18 werner * * Initial release * * */ #include #include #include #include #include #include #include #include "hysdn_defs.h" static char *hysdn_init_revision = "$Revision: 1.1 $"; int cardmax; /* number of found cards */ hysdn_card *card_root = NULL; /* pointer to first card */ /**********************************************/ /* table assigning PCI-sub ids to board types */ /* the last entry contains all 0 */ /**********************************************/ static struct { word subid; /* PCI sub id */ uchar cardtyp; /* card type assigned */ } pci_subid_map[] = { { PCI_SUB_ID_METRO, BD_METRO }, { PCI_SUB_ID_CHAMP2, BD_CHAMP2 }, { PCI_SUB_ID_ERGO, BD_ERGO }, { PCI_SUB_ID_OLD_ERGO, BD_ERGO }, { 0, 0 } /* terminating entry */ }; /*********************************************************************/ /* search_cards searches for available cards in the pci config data. */ /* If a card is found, the card structure is allocated and the cards */ /* ressources are reserved. cardmax is incremented. */ /*********************************************************************/ static void search_cards(void) { struct pci_dev *akt_pcidev = NULL; hysdn_card *card, *card_last; uchar irq; int i; card_root = NULL; card_last = NULL; while ((akt_pcidev = pci_find_device(PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_PLX, akt_pcidev)) != NULL) { if (!(card = kmalloc(sizeof(hysdn_card), GFP_KERNEL))) { printk(KERN_ERR "HYSDN: unable to alloc device mem \n"); return; } memset(card, 0, sizeof(hysdn_card)); card->myid = cardmax; /* set own id */ card->bus = akt_pcidev->bus->number; card->devfn = akt_pcidev->devfn; /* slot + function */ pcibios_read_config_word(card->bus, card->devfn, PCI_SUBSYSTEM_ID, &card->subsysid); pcibios_read_config_byte(card->bus, card->devfn, PCI_INTERRUPT_LINE, &irq); card->irq = irq; card->iobase = akt_pcidev->resource[ PCI_REG_PLX_IO_BASE].start & PCI_BASE_ADDRESS_IO_MASK; card->plxbase = akt_pcidev->resource[ PCI_REG_PLX_MEM_BASE].start; card->membase = akt_pcidev->resource[ PCI_REG_MEMORY_BASE].start; 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 */ for (i = 0; pci_subid_map[i].subid; i++) if (pci_subid_map[i].subid == card->subsysid) { card->brdtype = pci_subid_map[i].cardtyp; break; } if (card->brdtype != BD_NONE) { if (ergo_inithardware(card)) { printk(KERN_WARNING "HYSDN: card at io 0x%04x already in use\n", card->iobase); kfree(card); continue; } } else { printk(KERN_WARNING "HYSDN: unknown card id 0x%04x\n", card->subsysid); kfree(card); /* release mem */ continue; } 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 */ } /* device found */ } /* search_cards */ /************************************************************************************/ /* free_resources frees the acquired PCI resources and returns the allocated memory */ /************************************************************************************/ static void free_resources(void) { hysdn_card *card; while (card_root) { card = card_root; if (card->releasehardware) card->releasehardware(card); /* free all hardware resources */ card_root = card_root->next; /* remove card from chain */ kfree(card); /* return mem */ } /* while card_root */ } /* free_resources */ /**************************************************************************/ /* stop_cards disables (hardware resets) all cards and disables interrupt */ /**************************************************************************/ static void stop_cards(void) { hysdn_card *card; card = card_root; /* first in chain */ while (card) { if (card->stopcard) card->stopcard(card); card = card->next; /* remove card from chain */ } /* while card */ } /* stop_cards */ /****************************************************************************/ /* 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. */ /****************************************************************************/ #ifdef CONFIG_MODULES /******************************************************/ /* 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 successfull */ /* 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. */ /****************************************************************************/ int init_module(void) { char tmp[50]; 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)); if (!pci_present()) { printk(KERN_ERR "HYSDN: no PCI bus present, module not loaded\n"); return (-1); } search_cards(); printk(KERN_INFO "HYSDN: %d card(s) found.\n", cardmax); if (hysdn_procconf_init()) { free_resources(); /* proc file_sys not created */ return (-1); } 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 successfull 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. */ /***********************************************************************/ void cleanup_module(void) { stop_cards(); hysdn_procconf_release(); free_resources(); printk(KERN_NOTICE "HYSDN: module unloaded\n"); } /* cleanup_module */ #endif /* CONFIG_MODULES */