1 /* $NetBSD: drm_module.c,v 1.5 2014/04/04 15:16:59 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 1.5 2014/04/04 15:16:59 riastradh Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/device.h> 37 #include <sys/module.h> 38 #include <sys/reboot.h> 39 #include <sys/systm.h> 40 41 #include <drm/drmP.h> 42 43 /* 44 * XXX I2C stuff should be moved to a separate drmkms_i2c module. 45 */ 46 MODULE(MODULE_CLASS_DRIVER, drmkms, "iic,drmkms_linux"); 47 48 #ifdef _MODULE 49 #include "ioconf.c" 50 #endif 51 52 /* 53 * XXX Mega-kludge. See drm_init in drm_drv.c for details. 54 */ 55 #ifdef _MODULE 56 static const int linux_suppress_init = 1; 57 #else 58 extern int linux_suppress_init; 59 #endif 60 61 static int 62 drmkms_modcmd(modcmd_t cmd, void *arg __unused) 63 { 64 #ifdef _MODULE 65 devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR; 66 int error; 67 #endif 68 69 switch (cmd) { 70 case MODULE_CMD_INIT: 71 if (!linux_suppress_init) { 72 linux_mutex_init(&drm_global_mutex); 73 if (ISSET(boothowto, AB_DEBUG)) 74 drm_debug = ~(unsigned int)0; 75 } 76 #ifdef _MODULE 77 error = config_init_component(cfdriver_ioconf_drmkms, 78 cfattach_ioconf_drmkms, cfdata_ioconf_drmkms); 79 if (error) { 80 aprint_error("drmkms: unable to init component: %d\n", 81 error); 82 goto init_fail0; 83 } 84 error = devsw_attach("drm", NULL, &bmajor, 85 &drm_cdevsw, &cmajor); 86 if (error) { 87 aprint_error("drmkms: unable to attach devsw: %d\n", 88 error); 89 goto init_fail1; 90 } 91 #endif 92 return 0; 93 94 #ifdef _MODULE 95 init_fail2: __unused 96 (void)devsw_detach(NULL, &drm_cdevsw); 97 init_fail1: (void)config_fini_component(cfdriver_ioconf_drmkms, 98 cfattach_ioconf_drmkms, cfdata_ioconf_drmkms); 99 init_fail0: linux_mutex_destroy(&drm_global_mutex); 100 return error; 101 #endif /* _MODULE */ 102 103 case MODULE_CMD_FINI: 104 #ifdef _MODULE 105 error = devsw_detach(NULL, &drm_cdevsw); 106 if (error) 107 return error; 108 error = config_fini_component(cfdriver_ioconf_drmkms, 109 cfattach_ioconf_drmkms, cfdata_ioconf_drmkms); 110 if (error) 111 /* XXX Now what? Reattach the devsw? */ 112 return error; 113 #endif 114 linux_mutex_destroy(&drm_global_mutex); 115 return 0; 116 117 default: 118 return ENOTTY; 119 } 120 } 121