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