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drm_module.c revision 1.10
      1  1.10  riastrad /*	$NetBSD: drm_module.c,v 1.10 2015/03/05 17:42:48 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  1.10  riastrad __KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.10 2015/03/05 17:42:48 riastradh Exp $");
     34   1.2  riastrad 
     35   1.2  riastrad #include <sys/types.h>
     36   1.8  riastrad #include <sys/conf.h>
     37   1.2  riastrad #include <sys/device.h>
     38   1.2  riastrad #include <sys/module.h>
     39   1.6  riastrad #ifndef _MODULE
     40   1.6  riastrad #include <sys/once.h>
     41   1.6  riastrad #endif
     42   1.4  riastrad #include <sys/reboot.h>
     43   1.2  riastrad #include <sys/systm.h>
     44   1.2  riastrad 
     45   1.6  riastrad #include <linux/mutex.h>
     46   1.6  riastrad 
     47   1.2  riastrad #include <drm/drmP.h>
     48  1.10  riastrad #include <drm/drm_encoder_slave.h>
     49   1.9  christos #include <drm/drm_sysctl.h>
     50   1.2  riastrad 
     51   1.2  riastrad /*
     52   1.2  riastrad  * XXX I2C stuff should be moved to a separate drmkms_i2c module.
     53   1.2  riastrad  */
     54   1.2  riastrad MODULE(MODULE_CLASS_DRIVER, drmkms, "iic,drmkms_linux");
     55   1.2  riastrad 
     56   1.6  riastrad struct mutex	drm_global_mutex;
     57   1.6  riastrad 
     58   1.9  christos struct drm_sysctl_def drm_def = DRM_SYSCTL_INIT();
     59   1.9  christos 
     60   1.6  riastrad static int
     61   1.6  riastrad drm_init(void)
     62   1.6  riastrad {
     63   1.6  riastrad 	extern int linux_guarantee_initialized(void);
     64   1.6  riastrad 	int error;
     65   1.6  riastrad 
     66   1.6  riastrad 	error = linux_guarantee_initialized();
     67   1.6  riastrad 	if (error)
     68   1.6  riastrad 		return error;
     69   1.6  riastrad 
     70   1.6  riastrad 	if (ISSET(boothowto, AB_DEBUG))
     71   1.6  riastrad 		drm_debug = ~(unsigned int)0;
     72   1.6  riastrad 
     73   1.6  riastrad 	spin_lock_init(&drm_minor_lock);
     74   1.6  riastrad 	idr_init(&drm_minors_idr);
     75   1.6  riastrad 	linux_mutex_init(&drm_global_mutex);
     76   1.6  riastrad 	drm_connector_ida_init();
     77   1.7  riastrad 	drm_global_init();
     78   1.9  christos 	drm_sysctl_init(&drm_def);
     79  1.10  riastrad 	drm_i2c_encoders_init();
     80   1.6  riastrad 
     81   1.6  riastrad 	return 0;
     82   1.6  riastrad }
     83   1.6  riastrad 
     84   1.6  riastrad int	drm_guarantee_initialized(void); /* XXX */
     85   1.6  riastrad int
     86   1.6  riastrad drm_guarantee_initialized(void)
     87   1.6  riastrad {
     88   1.5  riastrad #ifdef _MODULE
     89   1.6  riastrad 	return 0;
     90   1.5  riastrad #else
     91   1.6  riastrad 	static ONCE_DECL(drm_init_once);
     92   1.6  riastrad 
     93   1.6  riastrad 	return RUN_ONCE(&drm_init_once, &drm_init);
     94   1.2  riastrad #endif
     95   1.6  riastrad }
     96   1.6  riastrad 
     97   1.6  riastrad static void
     98   1.6  riastrad drm_fini(void)
     99   1.6  riastrad {
    100  1.10  riastrad 
    101  1.10  riastrad 	drm_i2c_encoders_fini();
    102   1.9  christos 	drm_sysctl_fini(&drm_def);
    103   1.7  riastrad 	drm_global_release();
    104   1.6  riastrad 	drm_connector_ida_destroy();
    105   1.6  riastrad 	linux_mutex_destroy(&drm_global_mutex);
    106   1.6  riastrad 	idr_destroy(&drm_minors_idr);
    107   1.6  riastrad 	spin_lock_destroy(&drm_minor_lock);
    108   1.6  riastrad }
    109   1.2  riastrad 
    110   1.2  riastrad static int
    111   1.2  riastrad drmkms_modcmd(modcmd_t cmd, void *arg __unused)
    112   1.2  riastrad {
    113   1.2  riastrad #ifdef _MODULE
    114   1.2  riastrad 	devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR;
    115   1.6  riastrad #endif
    116   1.2  riastrad 	int error;
    117   1.2  riastrad 
    118   1.2  riastrad 	switch (cmd) {
    119   1.2  riastrad 	case MODULE_CMD_INIT:
    120   1.2  riastrad #ifdef _MODULE
    121   1.6  riastrad 		error = drm_init();
    122   1.6  riastrad #else
    123   1.6  riastrad 		error = drm_guarantee_initialized();
    124   1.6  riastrad #endif
    125   1.6  riastrad 		if (error)
    126   1.6  riastrad 			return error;
    127   1.6  riastrad #ifdef _MODULE
    128   1.2  riastrad 		error = devsw_attach("drm", NULL, &bmajor,
    129   1.2  riastrad 		    &drm_cdevsw, &cmajor);
    130   1.2  riastrad 		if (error) {
    131   1.2  riastrad 			aprint_error("drmkms: unable to attach devsw: %d\n",
    132   1.2  riastrad 			    error);
    133   1.6  riastrad 			return error;
    134   1.2  riastrad 		}
    135   1.2  riastrad #endif
    136   1.2  riastrad 		return 0;
    137   1.2  riastrad 
    138   1.2  riastrad 	case MODULE_CMD_FINI:
    139   1.2  riastrad #ifdef _MODULE
    140   1.2  riastrad 		error = devsw_detach(NULL, &drm_cdevsw);
    141   1.2  riastrad 		if (error)
    142   1.2  riastrad 			return error;
    143   1.2  riastrad #endif
    144   1.6  riastrad 		drm_fini();
    145   1.2  riastrad 		return 0;
    146   1.2  riastrad 
    147   1.2  riastrad 	default:
    148   1.2  riastrad 		return ENOTTY;
    149   1.2  riastrad 	}
    150   1.2  riastrad }
    151