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Linux/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,
 24           PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_METRO, 0, 0, BD_METRO },
 25         { PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
 26           PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_CHAMP2, 0, 0, BD_CHAMP2 },
 27         { PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
 28           PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_ERGO, 0, 0, BD_ERGO },
 29         { PCI_VENDOR_ID_HYPERCOPE, PCI_DEVICE_ID_HYPERCOPE_PLX,
 30           PCI_ANY_ID, PCI_SUBDEVICE_ID_HYPERCOPE_OLD_ERGO, 0, 0, BD_ERGO },
 31 
 32         { }                             /* Terminating entry */
 33 };
 34 MODULE_DEVICE_TABLE(pci, hysdn_pci_tbl);
 35 MODULE_DESCRIPTION("ISDN4Linux: Driver for HYSDN cards");
 36 MODULE_AUTHOR("Werner Cornelius");
 37 MODULE_LICENSE("GPL");
 38 
 39 static int cardmax;             /* number of found cards */
 40 hysdn_card *card_root = NULL;   /* pointer to first card */
 41 static hysdn_card *card_last = NULL;    /* pointer to first card */
 42 
 43 
 44 /****************************************************************************/
 45 /* The module startup and shutdown code. Only compiled when used as module. */
 46 /* Using the driver as module is always advisable, because the booting      */
 47 /* image becomes smaller and the driver code is only loaded when needed.    */
 48 /* Additionally newer versions may be activated without rebooting.          */
 49 /****************************************************************************/
 50 
 51 /****************************************************************************/
 52 /* init_module is called once when the module is loaded to do all necessary */
 53 /* things like autodetect...                                                */
 54 /* If the return value of this function is 0 the init has been successful   */
 55 /* and the module is added to the list in /proc/modules, otherwise an error */
 56 /* is assumed and the module will not be kept in memory.                    */
 57 /****************************************************************************/
 58 
 59 static int hysdn_pci_init_one(struct pci_dev *akt_pcidev,
 60                               const struct pci_device_id *ent)
 61 {
 62         hysdn_card *card;
 63         int rc;
 64 
 65         rc = pci_enable_device(akt_pcidev);
 66         if (rc)
 67                 return rc;
 68 
 69         if (!(card = kzalloc(sizeof(hysdn_card), GFP_KERNEL))) {
 70                 printk(KERN_ERR "HYSDN: unable to alloc device mem \n");
 71                 rc = -ENOMEM;
 72                 goto err_out;
 73         }
 74         card->myid = cardmax;   /* set own id */
 75         card->bus = akt_pcidev->bus->number;
 76         card->devfn = akt_pcidev->devfn;        /* slot + function */
 77         card->subsysid = akt_pcidev->subsystem_device;
 78         card->irq = akt_pcidev->irq;
 79         card->iobase = pci_resource_start(akt_pcidev, PCI_REG_PLX_IO_BASE);
 80         card->plxbase = pci_resource_start(akt_pcidev, PCI_REG_PLX_MEM_BASE);
 81         card->membase = pci_resource_start(akt_pcidev, PCI_REG_MEMORY_BASE);
 82         card->brdtype = BD_NONE;        /* unknown */
 83         card->debug_flags = DEF_DEB_FLAGS;      /* set default debug */
 84         card->faxchans = 0;     /* default no fax channels */
 85         card->bchans = 2;       /* and 2 b-channels */
 86         card->brdtype = ent->driver_data;
 87 
 88         if (ergo_inithardware(card)) {
 89                 printk(KERN_WARNING "HYSDN: card at io 0x%04x already in use\n", card->iobase);
 90                 rc = -EBUSY;
 91                 goto err_out_card;
 92         }
 93 
 94         cardmax++;
 95         card->next = NULL;      /*end of chain */
 96         if (card_last)
 97                 card_last->next = card;         /* pointer to next card */
 98         else
 99                 card_root = card;
100         card_last = card;       /* new chain end */
101 
102         pci_set_drvdata(akt_pcidev, card);
103         return 0;
104 
105 err_out_card:
106         kfree(card);
107 err_out:
108         pci_disable_device(akt_pcidev);
109         return rc;
110 }
111 
112 static void hysdn_pci_remove_one(struct pci_dev *akt_pcidev)
113 {
114         hysdn_card *card = pci_get_drvdata(akt_pcidev);
115 
116         pci_set_drvdata(akt_pcidev, NULL);
117 
118         if (card->stopcard)
119                 card->stopcard(card);
120 
121 #ifdef CONFIG_HYSDN_CAPI
122         hycapi_capi_release(card);
123 #endif
124 
125         if (card->releasehardware)
126                 card->releasehardware(card);   /* free all hardware resources */
127 
128         if (card == card_root) {
129                 card_root = card_root->next;
130                 if (!card_root)
131                         card_last = NULL;
132         } else {
133                 hysdn_card *tmp = card_root;
134                 while (tmp) {
135                         if (tmp->next == card)
136                                 tmp->next = card->next;
137                         card_last = tmp;
138                         tmp = tmp->next;
139                 }
140         }
141 
142         kfree(card);
143         pci_disable_device(akt_pcidev);
144 }
145 
146 static struct pci_driver hysdn_pci_driver = {
147         .name           = "hysdn",
148         .id_table       = hysdn_pci_tbl,
149         .probe          = hysdn_pci_init_one,
150         .remove         = hysdn_pci_remove_one,
151 };
152 
153 static int hysdn_have_procfs;
154 
155 static int __init
156 hysdn_init(void)
157 {
158         int rc;
159 
160         printk(KERN_NOTICE "HYSDN: module loaded\n");
161 
162         rc = pci_register_driver(&hysdn_pci_driver);
163         if (rc)
164                 return rc;
165 
166         printk(KERN_INFO "HYSDN: %d card(s) found.\n", cardmax);
167 
168         if (!hysdn_procconf_init())
169                 hysdn_have_procfs = 1;
170 
171 #ifdef CONFIG_HYSDN_CAPI
172         if (cardmax > 0) {
173                 if (hycapi_init()) {
174                         printk(KERN_ERR "HYCAPI: init failed\n");
175 
176                         if (hysdn_have_procfs)
177                                 hysdn_procconf_release();
178 
179                         pci_unregister_driver(&hysdn_pci_driver);
180                         return -ESPIPE;
181                 }
182         }
183 #endif /* CONFIG_HYSDN_CAPI */
184 
185         return 0;               /* no error */
186 }                               /* init_module */
187 
188 
189 /***********************************************************************/
190 /* cleanup_module is called when the module is released by the kernel. */
191 /* The routine is only called if init_module has been successful and   */
192 /* the module counter has a value of 0. Otherwise this function will   */
193 /* not be called. This function must release all resources still allo- */
194 /* cated as after the return from this function the module code will   */
195 /* be removed from memory.                                             */
196 /***********************************************************************/
197 static void __exit
198 hysdn_exit(void)
199 {
200         if (hysdn_have_procfs)
201                 hysdn_procconf_release();
202 
203         pci_unregister_driver(&hysdn_pci_driver);
204 
205 #ifdef CONFIG_HYSDN_CAPI
206         hycapi_cleanup();
207 #endif /* CONFIG_HYSDN_CAPI */
208 
209         printk(KERN_NOTICE "HYSDN: module unloaded\n");
210 }                               /* cleanup_module */
211 
212 module_init(hysdn_init);
213 module_exit(hysdn_exit);
214 

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