/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "devfsadm.h"
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>

#define DCAM_RE_STRING_LEN      64

#define DCAM_STR_LINK_RE        "^dcam([0-9]+)$"
#define DCAM_CTL_LINK_RE        "^dcamctl([0-9]+)$"

static int dcam1394_process(di_minor_t minor, di_node_t node);

static devfsadm_create_t dcam1394_cbt[] = {
        {
                "firewire",
                NULL,
                "dcam",
                DRV_RE,
                ILEVEL_0,
                dcam1394_process
        }
};

static char *debug_mid = "dcam1394_mid";

DEVFSADM_CREATE_INIT_V0(dcam1394_cbt);


static devfsadm_remove_t dcam1394_remove_cbt[] = {
        {
                "firewire",
                DCAM_STR_LINK_RE,
                RM_PRE | RM_HOT | RM_ALWAYS,
                ILEVEL_0,
                devfsadm_rm_all
        },
        {
                "firewire",
                DCAM_CTL_LINK_RE,
                RM_PRE | RM_HOT | RM_ALWAYS,
                ILEVEL_0,
                devfsadm_rm_all
        }
};

DEVFSADM_REMOVE_INIT_V0(dcam1394_remove_cbt);

int
minor_init(void)
{
        devfsadm_print(debug_mid, "dcam1394_link: minor_init\n");
        return (DEVFSADM_SUCCESS);
}

int
minor_fini(void)
{
        devfsadm_print(debug_mid, "dcam1394_link: minor_fini\n");
        return (DEVFSADM_SUCCESS);
}


/*
 * This function is called for every dcam1394 minor node.
 * Calls enumerate to assign a logical dcam1394 id, and then
 * devfsadm_mklink to make the link.
 */
static int
dcam1394_process(di_minor_t minor, di_node_t node)
{
        char m_name[PATH_MAX], restring0[DCAM_RE_STRING_LEN];
        char l_path[PATH_MAX], p_path[PATH_MAX], *buf, *devfspath;
        devfsadm_enumerate_t re[1];

        (void) strcpy(m_name, di_minor_name(minor));

        if (strcmp(di_driver_name(node), "dcam1394") != 0) {
            return (DEVFSADM_CONTINUE);
        }

        if (strncmp(m_name, "dcamctl", 7) == 0) {
                (void) snprintf(restring0, DCAM_RE_STRING_LEN,
                                DCAM_CTL_LINK_RE);
        } else if (strncmp(m_name, "dcam", 4) == 0) {
                (void) snprintf(restring0, DCAM_RE_STRING_LEN,
                                DCAM_STR_LINK_RE);
        } else {
                return (DEVFSADM_CONTINUE);
        }

        re[0].re        = restring0;
        re[0].subexp    = 1;
        re[0].flags     = MATCH_ALL;

        devfsadm_print(debug_mid,
            "dcam1394_process: path %s\n", di_devfs_path(node));

        (void) strcpy(p_path, devfspath = di_devfs_path(node));
        (void) strcat(p_path, ":");
        (void) strcat(p_path, di_minor_name(minor));
        di_devfs_path_free(devfspath);

        /*
         * Build the physical path from the components, omitting
         * minor name field.  Find the logical dcam1394 id, and
         * stuff it in buf.
         */
        if (devfsadm_enumerate_int(p_path, 0, &buf, re, 1)) {
                devfsadm_print(debug_mid,
                    "dcam1394_process: exit/continue\n");
                return (DEVFSADM_CONTINUE);
        }

        devfsadm_print(debug_mid, "dcam1394_process: p_path=%s buf=%s\n",
            p_path, buf);

        if (strncmp(di_minor_name(minor), "dcamctl", 7) == 0)
                (void) snprintf(l_path, PATH_MAX, "dcamctl%s", buf);
        else
                (void) snprintf(l_path, PATH_MAX, "dcam%s", buf);

        (void) devfsadm_mklink(l_path, node, minor, 0);

        free(buf);

        return (DEVFSADM_CONTINUE);
}