diva_didd.c

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/* $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 ([email protected])
 * Copyright 2002-2003 Cytronics & Melware ([email protected])
 *
 * 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 <linux/seq_file.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 divadidd_proc_show(struct seq_file *m, void *v)
{
    char tmprev[32];

    strcpy(tmprev, main_revision);
    seq_printf(m, "%s\n", DRIVERNAME);
    seq_printf(m, "name     : %s\n", DRIVERLNAME);
    seq_printf(m, "release  : %s\n", DRIVERRELEASE_DIDD);
    seq_printf(m, "build    : %s(%s)\n",
           diva_didd_common_code_build, DIVA_BUILD);
    seq_printf(m, "revision : %s\n", getrev(tmprev));

    return 0;
}

static int divadidd_proc_open(struct inode *inode, struct file *file)
{
    return single_open(file, divadidd_proc_show, NULL);
}

static const struct file_operations divadidd_proc_fops = {
    .owner      = THIS_MODULE,
    .open       = divadidd_proc_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = single_release,
};

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

    if (proc_net_eicon) {
        proc_didd = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
                    &divadidd_proc_fops);
        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 __init 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 __exit divadidd_exit(void)
{
    diddfunc_finit();
    remove_proc();
    printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
}

module_init(divadidd_init);
module_exit(divadidd_exit);