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diva_didd.c

/* $Id: diva_didd.c,v 1.13.6.4 2005/02/11 19:40:25 armin Exp $
 *
 * DIDD Interface module for Eicon active cards.
 * 
 * Functions are in dadapter.c 
 * 
 * Copyright 2002-2003 by Armin Schindler (mac@melware.de) 
 * Copyright 2002-2003 Cytronics & Melware (info@melware.de)
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <net/net_namespace.h>

#include "platform.h"
#include "di_defs.h"
#include "dadapter.h"
#include "divasync.h"
#include "did_vers.h"

static char *main_revision = "$Revision: 1.13.6.4 $";

static char *DRIVERNAME =
    "Eicon DIVA - DIDD table (http://www.melware.net)";
static char *DRIVERLNAME = "divadidd";
char *DRIVERRELEASE_DIDD = "2.0";

MODULE_DESCRIPTION("DIDD table driver for diva drivers");
MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
MODULE_SUPPORTED_DEVICE("Eicon diva drivers");
MODULE_LICENSE("GPL");

#define DBG_MINIMUM  (DL_LOG + DL_FTL + DL_ERR)
#define DBG_DEFAULT  (DBG_MINIMUM + DL_XLOG + DL_REG)

extern int diddfunc_init(void);
extern void diddfunc_finit(void);

extern void DIVA_DIDD_Read(void *, int);

static struct proc_dir_entry *proc_didd;
struct proc_dir_entry *proc_net_eicon = NULL;

EXPORT_SYMBOL(DIVA_DIDD_Read);
EXPORT_SYMBOL(proc_net_eicon);

static char *getrev(const char *revision)
{
      char *rev;
      char *p;
      if ((p = strchr(revision, ':'))) {
            rev = p + 2;
            p = strchr(rev, '$');
            *--p = 0;
      } else
            rev = "1.0";
      return rev;
}

static int
proc_read(char *page, char **start, off_t off, int count, int *eof,
        void *data)
{
      int len = 0;
      char tmprev[32];

      strcpy(tmprev, main_revision);
      len += sprintf(page + len, "%s\n", DRIVERNAME);
      len += sprintf(page + len, "name     : %s\n", DRIVERLNAME);
      len += sprintf(page + len, "release  : %s\n", DRIVERRELEASE_DIDD);
      len += sprintf(page + len, "build    : %s(%s)\n",
                   diva_didd_common_code_build, DIVA_BUILD);
      len += sprintf(page + len, "revision : %s\n", getrev(tmprev));

      if (off + count >= len)
            *eof = 1;
      if (len < off)
            return 0;
      *start = page + off;
      return ((count < len - off) ? count : len - off);
}

static int DIVA_INIT_FUNCTION create_proc(void)
{
      proc_net_eicon = proc_mkdir("eicon", init_net.proc_net);

      if (proc_net_eicon) {
            if ((proc_didd =
                 create_proc_entry(DRIVERLNAME, S_IFREG | S_IRUGO,
                               proc_net_eicon))) {
                  proc_didd->read_proc = proc_read;
            }
            return (1);
      }
      return (0);
}

static void remove_proc(void)
{
      remove_proc_entry(DRIVERLNAME, proc_net_eicon);
      remove_proc_entry("eicon", init_net.proc_net);
}

static int DIVA_INIT_FUNCTION divadidd_init(void)
{
      char tmprev[32];
      int ret = 0;

      printk(KERN_INFO "%s\n", DRIVERNAME);
      printk(KERN_INFO "%s: Rel:%s  Rev:", DRIVERLNAME, DRIVERRELEASE_DIDD);
      strcpy(tmprev, main_revision);
      printk("%s  Build:%s(%s)\n", getrev(tmprev),
             diva_didd_common_code_build, DIVA_BUILD);

      if (!create_proc()) {
            printk(KERN_ERR "%s: could not create proc entry\n",
                   DRIVERLNAME);
            ret = -EIO;
            goto out;
      }

      if (!diddfunc_init()) {
            printk(KERN_ERR "%s: failed to connect to DIDD.\n",
                   DRIVERLNAME);
#ifdef MODULE
            remove_proc();
#endif
            ret = -EIO;
            goto out;
      }

      out:
      return (ret);
}

static void DIVA_EXIT_FUNCTION divadidd_exit(void)
{
      diddfunc_finit();
      remove_proc();
      printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
}

module_init(divadidd_init);
module_exit(divadidd_exit);

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