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drm_module.c revision 1.2
      1  1.2  riastrad /*	$NetBSD: drm_module.c,v 1.2 2014/03/18 18:20:42 riastradh Exp $	*/
      2  1.2  riastrad 
      3  1.2  riastrad /*-
      4  1.2  riastrad  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  1.2  riastrad  * All rights reserved.
      6  1.2  riastrad  *
      7  1.2  riastrad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2  riastrad  * by Taylor R. Campbell.
      9  1.2  riastrad  *
     10  1.2  riastrad  * Redistribution and use in source and binary forms, with or without
     11  1.2  riastrad  * modification, are permitted provided that the following conditions
     12  1.2  riastrad  * are met:
     13  1.2  riastrad  * 1. Redistributions of source code must retain the above copyright
     14  1.2  riastrad  *    notice, this list of conditions and the following disclaimer.
     15  1.2  riastrad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2  riastrad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2  riastrad  *    documentation and/or other materials provided with the distribution.
     18  1.2  riastrad  *
     19  1.2  riastrad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2  riastrad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2  riastrad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2  riastrad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2  riastrad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2  riastrad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2  riastrad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2  riastrad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2  riastrad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2  riastrad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2  riastrad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2  riastrad  */
     31  1.2  riastrad 
     32  1.2  riastrad #include <sys/cdefs.h>
     33  1.2  riastrad __KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.2 2014/03/18 18:20:42 riastradh Exp $");
     34  1.2  riastrad 
     35  1.2  riastrad #include <sys/types.h>
     36  1.2  riastrad #include <sys/device.h>
     37  1.2  riastrad #include <sys/module.h>
     38  1.2  riastrad #include <sys/systm.h>
     39  1.2  riastrad 
     40  1.2  riastrad #include <drm/drmP.h>
     41  1.2  riastrad 
     42  1.2  riastrad /*
     43  1.2  riastrad  * XXX I2C stuff should be moved to a separate drmkms_i2c module.
     44  1.2  riastrad  */
     45  1.2  riastrad MODULE(MODULE_CLASS_DRIVER, drmkms, "iic,drmkms_linux");
     46  1.2  riastrad 
     47  1.2  riastrad #ifdef _MODULE
     48  1.2  riastrad #include "ioconf.c"
     49  1.2  riastrad #endif
     50  1.2  riastrad 
     51  1.2  riastrad #ifndef _MODULE
     52  1.2  riastrad /*
     53  1.2  riastrad  * XXX Mega-kludge.  See drm_init in drm_drv.c for details.
     54  1.2  riastrad  */
     55  1.2  riastrad extern int linux_suppress_init;
     56  1.2  riastrad #endif
     57  1.2  riastrad 
     58  1.2  riastrad static int
     59  1.2  riastrad drmkms_modcmd(modcmd_t cmd, void *arg __unused)
     60  1.2  riastrad {
     61  1.2  riastrad #ifdef _MODULE
     62  1.2  riastrad 	devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR;
     63  1.2  riastrad 	int error;
     64  1.2  riastrad #endif
     65  1.2  riastrad 
     66  1.2  riastrad 	switch (cmd) {
     67  1.2  riastrad 	case MODULE_CMD_INIT:
     68  1.2  riastrad #ifndef _MODULE
     69  1.2  riastrad 		if (!linux_suppress_init)
     70  1.2  riastrad #endif
     71  1.2  riastrad 		linux_mutex_init(&drm_global_mutex);
     72  1.2  riastrad #ifdef _MODULE
     73  1.2  riastrad 		error = config_init_component(cfdriver_ioconf_drmkms,
     74  1.2  riastrad 		    cfattach_ioconf_drmkms, cfdata_ioconf_drmkms);
     75  1.2  riastrad 		if (error) {
     76  1.2  riastrad 			aprint_error("drmkms: unable to init component: %d\n",
     77  1.2  riastrad 			    error);
     78  1.2  riastrad 			goto init_fail0;
     79  1.2  riastrad 		}
     80  1.2  riastrad 		error = devsw_attach("drm", NULL, &bmajor,
     81  1.2  riastrad 		    &drm_cdevsw, &cmajor);
     82  1.2  riastrad 		if (error) {
     83  1.2  riastrad 			aprint_error("drmkms: unable to attach devsw: %d\n",
     84  1.2  riastrad 			    error);
     85  1.2  riastrad 			goto init_fail1;
     86  1.2  riastrad 		}
     87  1.2  riastrad #endif
     88  1.2  riastrad 		return 0;
     89  1.2  riastrad 
     90  1.2  riastrad #ifdef _MODULE
     91  1.2  riastrad init_fail2: __unused
     92  1.2  riastrad 		(void)devsw_detach(NULL, &drm_cdevsw);
     93  1.2  riastrad init_fail1:	(void)config_fini_component(cfdriver_ioconf_drmkms,
     94  1.2  riastrad 		    cfattach_ioconf_drmkms, cfdata_ioconf_drmkms);
     95  1.2  riastrad init_fail0:	linux_mutex_destroy(&drm_global_mutex);
     96  1.2  riastrad 		return error;
     97  1.2  riastrad #endif	/* _MODULE */
     98  1.2  riastrad 
     99  1.2  riastrad 	case MODULE_CMD_FINI:
    100  1.2  riastrad #ifdef _MODULE
    101  1.2  riastrad 		error = devsw_detach(NULL, &drm_cdevsw);
    102  1.2  riastrad 		if (error)
    103  1.2  riastrad 			return error;
    104  1.2  riastrad 		error = config_fini_component(cfdriver_ioconf_drmkms,
    105  1.2  riastrad 		    cfattach_ioconf_drmkms, cfdata_ioconf_drmkms);
    106  1.2  riastrad 		if (error)
    107  1.2  riastrad 			/* XXX Now what?  Reattach the devsw?  */
    108  1.2  riastrad 			return error;
    109  1.2  riastrad #endif
    110  1.2  riastrad 		linux_mutex_destroy(&drm_global_mutex);
    111  1.2  riastrad 		return 0;
    112  1.2  riastrad 
    113  1.2  riastrad 	default:
    114  1.2  riastrad 		return ENOTTY;
    115  1.2  riastrad 	}
    116  1.2  riastrad }
    117