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drm_module.c revision 1.1.2.1 
      1 /*	$NetBSD: drm_module.c,v 1.1.2.1 2013/07/24 02:43:09 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.1.2.1 2013/07/24 02:43:09 riastradh Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/device.h>
     37 #include <sys/module.h>
     38 #include <sys/systm.h>
     39 
     40 MODULE(MODULE_CLASS_MISC, drm, NULL);
     41 
     42 #ifdef _MODULE
     43 #include "ioconf.c"
     44 #endif
     45 
     46 extern const struct cdevsw drm_cdevsw; /* XXX Put this in a header file?  */
     47 
     48 static int
     49 drm_modcmd(modcmd_t cmd, void *arg __unused)
     50 {
     51 #ifdef _MODULE
     52 	devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR;
     53 	int error;
     54 #endif
     55 
     56 	switch (cmd) {
     57 	case MODULE_CMD_INIT:
     58 #ifdef _MODULE
     59 		error = config_init_component(cfdriver_ioconf_drm,
     60 		    cfattach_ioconf_drm, cfdata_ioconf_drm);
     61 		if (error) {
     62 			aprint_error("drm: unable to init component: %d\n",
     63 			    error);
     64 			return error;
     65 		}
     66 		error = devsw_attach("drm", NULL, &bmajor,
     67 		    &drm_cdevsw, &cmajor);
     68 		if (error) {
     69 			aprint_error("drm: unable to attach devsw: %d\n",
     70 			    error);
     71 			(void)config_fini_component(cfdriver_ioconf_drm,
     72 			    cfattach_ioconf_drm, cfdata_ioconf_drm);
     73 			return error;
     74 		}
     75 #endif
     76 		return 0;
     77 
     78 	case MODULE_CMD_FINI:
     79 #ifdef _MODULE
     80 		error = devsw_detach(NULL, &drm_cdevsw);
     81 		if (error)
     82 			return error;
     83 		error = config_fini_component(cfdriver_ioconf_drm,
     84 		    cfattach_ioconf_drm, cfdata_ioconf_drm);
     85 		if (error)
     86 			/* XXX Now what?  Reattach the devsw?  */
     87 			return error;
     88 #endif
     89 		return 0;
     90 
     91 	default:
     92 		return ENOTTY;
     93 	}
     94 }
     95